mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-07 20:17:37 +00:00
5033 lines
165 KiB
C++
5033 lines
165 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* vim: set ts=8 sts=4 et sw=4 tw=99:
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/* JavaScript API. */
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#ifndef jsapi_h
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#define jsapi_h
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#include "mozilla/FloatingPoint.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/RangedPtr.h"
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#include <stdarg.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include "jsalloc.h"
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#include "jspubtd.h"
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#include "js/CallArgs.h"
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#include "js/Class.h"
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#include "js/HashTable.h"
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#include "js/Id.h"
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#include "js/Principals.h"
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#include "js/RootingAPI.h"
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#include "js/TracingAPI.h"
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#include "js/Utility.h"
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#include "js/Value.h"
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#include "js/Vector.h"
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/************************************************************************/
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namespace JS {
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class Latin1CharsZ;
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class TwoByteChars;
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#if defined JS_THREADSAFE && defined JS_DEBUG
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class JS_PUBLIC_API(AutoCheckRequestDepth)
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{
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JSContext *cx;
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public:
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AutoCheckRequestDepth(JSContext *cx);
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AutoCheckRequestDepth(js::ContextFriendFields *cx);
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~AutoCheckRequestDepth();
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};
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# define CHECK_REQUEST(cx) \
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JS::AutoCheckRequestDepth _autoCheckRequestDepth(cx)
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#else
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# define CHECK_REQUEST(cx) \
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((void) 0)
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#endif /* JS_THREADSAFE && JS_DEBUG */
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#ifdef JS_DEBUG
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/*
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* Assert that we're not doing GC on cx, that we're in a request as
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* needed, and that the compartments for cx and v are correct.
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* Also check that GC would be safe at this point.
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*/
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JS_PUBLIC_API(void)
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AssertArgumentsAreSane(JSContext *cx, JS::HandleValue v);
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#else
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inline void AssertArgumentsAreSane(JSContext *cx, JS::HandleValue v) {
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/* Do nothing */
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}
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#endif /* JS_DEBUG */
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class JS_PUBLIC_API(AutoGCRooter) {
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public:
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AutoGCRooter(JSContext *cx, ptrdiff_t tag);
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AutoGCRooter(js::ContextFriendFields *cx, ptrdiff_t tag);
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~AutoGCRooter() {
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JS_ASSERT(this == *stackTop);
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*stackTop = down;
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}
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/* Implemented in gc/RootMarking.cpp. */
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inline void trace(JSTracer *trc);
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static void traceAll(JSTracer *trc);
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static void traceAllWrappers(JSTracer *trc);
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protected:
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AutoGCRooter * const down;
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/*
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* Discriminates actual subclass of this being used. If non-negative, the
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* subclass roots an array of values of the length stored in this field.
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* If negative, meaning is indicated by the corresponding value in the enum
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* below. Any other negative value indicates some deeper problem such as
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* memory corruption.
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*/
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ptrdiff_t tag_;
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enum {
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VALARRAY = -2, /* js::AutoValueArray */
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PARSER = -3, /* js::frontend::Parser */
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SHAPEVECTOR = -4, /* js::AutoShapeVector */
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IDARRAY = -6, /* js::AutoIdArray */
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DESCRIPTORS = -7, /* js::AutoPropDescArrayRooter */
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ID = -9, /* js::AutoIdRooter */
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VALVECTOR = -10, /* js::AutoValueVector */
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IDVECTOR = -13, /* js::AutoIdVector */
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OBJVECTOR = -14, /* js::AutoObjectVector */
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STRINGVECTOR =-15, /* js::AutoStringVector */
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SCRIPTVECTOR =-16, /* js::AutoScriptVector */
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NAMEVECTOR = -17, /* js::AutoNameVector */
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HASHABLEVALUE=-18, /* js::HashableValue */
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IONMASM = -19, /* js::jit::MacroAssembler */
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IONALLOC = -20, /* js::jit::AutoTempAllocatorRooter */
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WRAPVECTOR = -21, /* js::AutoWrapperVector */
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WRAPPER = -22, /* js::AutoWrapperRooter */
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OBJOBJHASHMAP=-23, /* js::AutoObjectObjectHashMap */
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OBJU32HASHMAP=-24, /* js::AutoObjectUnsigned32HashMap */
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OBJHASHSET = -25, /* js::AutoObjectHashSet */
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JSONPARSER = -26, /* js::JSONParser */
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CUSTOM = -27, /* js::CustomAutoRooter */
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FUNVECTOR = -28 /* js::AutoFunctionVector */
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};
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private:
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AutoGCRooter ** const stackTop;
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/* No copy or assignment semantics. */
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AutoGCRooter(AutoGCRooter &ida) MOZ_DELETE;
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void operator=(AutoGCRooter &ida) MOZ_DELETE;
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};
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/* AutoValueArray roots an internal fixed-size array of Values. */
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template <size_t N>
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class AutoValueArray : public AutoGCRooter
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{
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const size_t length_;
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Value elements_[N];
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public:
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AutoValueArray(JSContext *cx
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MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
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: AutoGCRooter(cx, VALARRAY), length_(N)
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{
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/* Always initialize in case we GC before assignment. */
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mozilla::PodArrayZero(elements_);
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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}
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unsigned length() const { return length_; }
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const Value *begin() const { return elements_; }
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Value *begin() { return elements_; }
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HandleValue operator[](unsigned i) const {
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JS_ASSERT(i < N);
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return HandleValue::fromMarkedLocation(&elements_[i]);
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}
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MutableHandleValue operator[](unsigned i) {
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JS_ASSERT(i < N);
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return MutableHandleValue::fromMarkedLocation(&elements_[i]);
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}
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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};
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template<class T>
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class AutoVectorRooter : protected AutoGCRooter
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{
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typedef js::Vector<T, 8> VectorImpl;
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VectorImpl vector;
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public:
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explicit AutoVectorRooter(JSContext *cx, ptrdiff_t tag
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MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
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: AutoGCRooter(cx, tag), vector(cx)
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{
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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}
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explicit AutoVectorRooter(js::ContextFriendFields *cx, ptrdiff_t tag
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MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
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: AutoGCRooter(cx, tag), vector(cx)
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{
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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}
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typedef T ElementType;
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typedef typename VectorImpl::Range Range;
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size_t length() const { return vector.length(); }
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bool empty() const { return vector.empty(); }
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bool append(const T &v) { return vector.append(v); }
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bool append(const T *ptr, size_t len) { return vector.append(ptr, len); }
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bool appendAll(const AutoVectorRooter<T> &other) {
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return vector.appendAll(other.vector);
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}
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bool insert(T *p, const T &val) { return vector.insert(p, val); }
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/* For use when space has already been reserved. */
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void infallibleAppend(const T &v) { vector.infallibleAppend(v); }
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void popBack() { vector.popBack(); }
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T popCopy() { return vector.popCopy(); }
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bool growBy(size_t inc) {
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size_t oldLength = vector.length();
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if (!vector.growByUninitialized(inc))
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return false;
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makeRangeGCSafe(oldLength);
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return true;
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}
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bool resize(size_t newLength) {
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size_t oldLength = vector.length();
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if (newLength <= oldLength) {
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vector.shrinkBy(oldLength - newLength);
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return true;
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}
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if (!vector.growByUninitialized(newLength - oldLength))
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return false;
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makeRangeGCSafe(oldLength);
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return true;
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}
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void clear() { vector.clear(); }
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bool reserve(size_t newLength) {
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return vector.reserve(newLength);
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}
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T &operator[](size_t i) { return vector[i]; }
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const T &operator[](size_t i) const { return vector[i]; }
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JS::MutableHandle<T> handleAt(size_t i) {
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return JS::MutableHandle<T>::fromMarkedLocation(&vector[i]);
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}
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JS::Handle<T> handleAt(size_t i) const {
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return JS::Handle<T>::fromMarkedLocation(&vector[i]);
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}
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const T *begin() const { return vector.begin(); }
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T *begin() { return vector.begin(); }
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const T *end() const { return vector.end(); }
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T *end() { return vector.end(); }
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Range all() { return vector.all(); }
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const T &back() const { return vector.back(); }
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friend void AutoGCRooter::trace(JSTracer *trc);
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private:
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void makeRangeGCSafe(size_t oldLength) {
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T *t = vector.begin() + oldLength;
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for (size_t i = oldLength; i < vector.length(); ++i, ++t)
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memset(t, 0, sizeof(T));
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}
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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};
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template<class Key, class Value>
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class AutoHashMapRooter : protected AutoGCRooter
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{
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private:
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typedef js::HashMap<Key, Value> HashMapImpl;
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public:
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explicit AutoHashMapRooter(JSContext *cx, ptrdiff_t tag
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MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
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: AutoGCRooter(cx, tag), map(cx)
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{
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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}
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typedef Key KeyType;
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typedef Value ValueType;
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typedef typename HashMapImpl::Entry Entry;
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typedef typename HashMapImpl::Lookup Lookup;
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typedef typename HashMapImpl::Ptr Ptr;
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typedef typename HashMapImpl::AddPtr AddPtr;
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bool init(uint32_t len = 16) {
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return map.init(len);
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}
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bool initialized() const {
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return map.initialized();
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}
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Ptr lookup(const Lookup &l) const {
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return map.lookup(l);
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}
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void remove(Ptr p) {
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map.remove(p);
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}
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AddPtr lookupForAdd(const Lookup &l) const {
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return map.lookupForAdd(l);
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}
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template<typename KeyInput, typename ValueInput>
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bool add(AddPtr &p, const KeyInput &k, const ValueInput &v) {
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return map.add(p, k, v);
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}
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bool add(AddPtr &p, const Key &k) {
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return map.add(p, k);
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}
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template<typename KeyInput, typename ValueInput>
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bool relookupOrAdd(AddPtr &p, const KeyInput &k, const ValueInput &v) {
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return map.relookupOrAdd(p, k, v);
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}
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typedef typename HashMapImpl::Range Range;
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Range all() const {
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return map.all();
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}
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typedef typename HashMapImpl::Enum Enum;
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void clear() {
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map.clear();
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}
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void finish() {
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map.finish();
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}
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bool empty() const {
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return map.empty();
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}
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uint32_t count() const {
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return map.count();
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}
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size_t capacity() const {
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return map.capacity();
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}
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size_t sizeOfExcludingThis(mozilla::MallocSizeOf mallocSizeOf) const {
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return map.sizeOfExcludingThis(mallocSizeOf);
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}
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size_t sizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const {
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return map.sizeOfIncludingThis(mallocSizeOf);
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}
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unsigned generation() const {
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return map.generation();
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}
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/************************************************** Shorthand operations */
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bool has(const Lookup &l) const {
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return map.has(l);
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}
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template<typename KeyInput, typename ValueInput>
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bool put(const KeyInput &k, const ValueInput &v) {
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return map.put(k, v);
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}
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template<typename KeyInput, typename ValueInput>
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bool putNew(const KeyInput &k, const ValueInput &v) {
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return map.putNew(k, v);
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}
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Ptr lookupWithDefault(const Key &k, const Value &defaultValue) {
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return map.lookupWithDefault(k, defaultValue);
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}
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void remove(const Lookup &l) {
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map.remove(l);
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}
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friend void AutoGCRooter::trace(JSTracer *trc);
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private:
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AutoHashMapRooter(const AutoHashMapRooter &hmr) MOZ_DELETE;
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AutoHashMapRooter &operator=(const AutoHashMapRooter &hmr) MOZ_DELETE;
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HashMapImpl map;
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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};
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template<class T>
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class AutoHashSetRooter : protected AutoGCRooter
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{
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private:
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typedef js::HashSet<T> HashSetImpl;
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public:
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explicit AutoHashSetRooter(JSContext *cx, ptrdiff_t tag
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MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
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: AutoGCRooter(cx, tag), set(cx)
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{
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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}
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typedef typename HashSetImpl::Lookup Lookup;
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typedef typename HashSetImpl::Ptr Ptr;
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typedef typename HashSetImpl::AddPtr AddPtr;
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bool init(uint32_t len = 16) {
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return set.init(len);
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}
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bool initialized() const {
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return set.initialized();
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}
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Ptr lookup(const Lookup &l) const {
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return set.lookup(l);
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}
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void remove(Ptr p) {
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set.remove(p);
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}
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AddPtr lookupForAdd(const Lookup &l) const {
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return set.lookupForAdd(l);
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}
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bool add(AddPtr &p, const T &t) {
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return set.add(p, t);
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}
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bool relookupOrAdd(AddPtr &p, const Lookup &l, const T &t) {
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return set.relookupOrAdd(p, l, t);
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}
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typedef typename HashSetImpl::Range Range;
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Range all() const {
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return set.all();
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}
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typedef typename HashSetImpl::Enum Enum;
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void clear() {
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set.clear();
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}
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void finish() {
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set.finish();
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}
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bool empty() const {
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return set.empty();
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}
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uint32_t count() const {
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return set.count();
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}
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size_t capacity() const {
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return set.capacity();
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}
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size_t sizeOfExcludingThis(mozilla::MallocSizeOf mallocSizeOf) const {
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return set.sizeOfExcludingThis(mallocSizeOf);
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}
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size_t sizeOfIncludingThis(mozilla::MallocSizeOf mallocSizeOf) const {
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return set.sizeOfIncludingThis(mallocSizeOf);
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}
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unsigned generation() const {
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return set.generation();
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}
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/************************************************** Shorthand operations */
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bool has(const Lookup &l) const {
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return set.has(l);
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}
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bool put(const T &t) {
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return set.put(t);
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}
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bool putNew(const T &t) {
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return set.putNew(t);
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}
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void remove(const Lookup &l) {
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set.remove(l);
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}
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friend void AutoGCRooter::trace(JSTracer *trc);
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private:
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AutoHashSetRooter(const AutoHashSetRooter &hmr) MOZ_DELETE;
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AutoHashSetRooter &operator=(const AutoHashSetRooter &hmr) MOZ_DELETE;
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HashSetImpl set;
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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};
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class MOZ_STACK_CLASS AutoValueVector : public AutoVectorRooter<Value>
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{
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public:
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explicit AutoValueVector(JSContext *cx
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MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
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: AutoVectorRooter<Value>(cx, VALVECTOR)
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{
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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}
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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};
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class AutoIdVector : public AutoVectorRooter<jsid>
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{
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public:
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explicit AutoIdVector(JSContext *cx
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MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
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: AutoVectorRooter<jsid>(cx, IDVECTOR)
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{
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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}
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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};
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class AutoObjectVector : public AutoVectorRooter<JSObject *>
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{
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public:
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explicit AutoObjectVector(JSContext *cx
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MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
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: AutoVectorRooter<JSObject *>(cx, OBJVECTOR)
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{
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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}
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MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
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};
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class AutoFunctionVector : public AutoVectorRooter<JSFunction *>
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{
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public:
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explicit AutoFunctionVector(JSContext *cx
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MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
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: AutoVectorRooter<JSFunction *>(cx, FUNVECTOR)
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{
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MOZ_GUARD_OBJECT_NOTIFIER_INIT;
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}
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explicit AutoFunctionVector(js::ContextFriendFields *cx
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MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
|
|
: AutoVectorRooter<JSFunction *>(cx, FUNVECTOR)
|
|
{
|
|
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
|
|
}
|
|
|
|
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
|
|
};
|
|
|
|
class AutoScriptVector : public AutoVectorRooter<JSScript *>
|
|
{
|
|
public:
|
|
explicit AutoScriptVector(JSContext *cx
|
|
MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
|
|
: AutoVectorRooter<JSScript *>(cx, SCRIPTVECTOR)
|
|
{
|
|
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
|
|
}
|
|
|
|
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
|
|
};
|
|
|
|
/*
|
|
* Cutsom rooting behavior for internal and external clients.
|
|
*/
|
|
class JS_PUBLIC_API(CustomAutoRooter) : private AutoGCRooter
|
|
{
|
|
public:
|
|
template <typename CX>
|
|
explicit CustomAutoRooter(CX *cx MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
|
|
: AutoGCRooter(cx, CUSTOM)
|
|
{
|
|
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
|
|
}
|
|
|
|
friend void AutoGCRooter::trace(JSTracer *trc);
|
|
|
|
protected:
|
|
/* Supplied by derived class to trace roots. */
|
|
virtual void trace(JSTracer *trc) = 0;
|
|
|
|
private:
|
|
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
|
|
};
|
|
|
|
/* A handle to an array of rooted values. */
|
|
class HandleValueArray
|
|
{
|
|
const size_t length_;
|
|
const Value * const elements_;
|
|
|
|
HandleValueArray(size_t len, const Value *elements) : length_(len), elements_(elements) {}
|
|
|
|
public:
|
|
HandleValueArray(const RootedValue& value) : length_(1), elements_(value.address()) {}
|
|
|
|
HandleValueArray(const AutoValueVector& values)
|
|
: length_(values.length()), elements_(values.begin()) {}
|
|
|
|
template <size_t N>
|
|
HandleValueArray(const AutoValueArray<N>& values) : length_(N), elements_(values.begin()) {}
|
|
|
|
/* CallArgs must already be rooted somewhere up the stack. */
|
|
HandleValueArray(const JS::CallArgs& args) : length_(args.length()), elements_(args.array()) {}
|
|
|
|
/* Use with care! Only call this if the data is guaranteed to be marked. */
|
|
static HandleValueArray fromMarkedLocation(size_t len, const Value *elements) {
|
|
return HandleValueArray(len, elements);
|
|
}
|
|
|
|
static HandleValueArray subarray(const HandleValueArray& values, size_t startIndex, size_t len) {
|
|
JS_ASSERT(startIndex + len <= values.length());
|
|
return HandleValueArray(len, values.begin() + startIndex);
|
|
}
|
|
|
|
static HandleValueArray empty() {
|
|
return HandleValueArray(0, nullptr);
|
|
}
|
|
|
|
size_t length() const { return length_; }
|
|
const Value *begin() const { return elements_; }
|
|
|
|
HandleValue operator[](size_t i) const {
|
|
JS_ASSERT(i < length_);
|
|
return HandleValue::fromMarkedLocation(&elements_[i]);
|
|
}
|
|
};
|
|
|
|
} /* namespace JS */
|
|
|
|
/************************************************************************/
|
|
|
|
struct JSFreeOp {
|
|
private:
|
|
JSRuntime *runtime_;
|
|
|
|
protected:
|
|
JSFreeOp(JSRuntime *rt)
|
|
: runtime_(rt) { }
|
|
|
|
public:
|
|
JSRuntime *runtime() const {
|
|
return runtime_;
|
|
}
|
|
};
|
|
|
|
/* Callbacks and their arguments. */
|
|
|
|
/************************************************************************/
|
|
|
|
typedef enum JSContextOp {
|
|
JSCONTEXT_NEW,
|
|
JSCONTEXT_DESTROY
|
|
} JSContextOp;
|
|
|
|
/*
|
|
* The possible values for contextOp when the runtime calls the callback are:
|
|
* JSCONTEXT_NEW JS_NewContext successfully created a new JSContext
|
|
* instance. The callback can initialize the instance as
|
|
* required. If the callback returns false, the instance
|
|
* will be destroyed and JS_NewContext returns null. In
|
|
* this case the callback is not called again.
|
|
* JSCONTEXT_DESTROY One of JS_DestroyContext* methods is called. The
|
|
* callback may perform its own cleanup and must always
|
|
* return true.
|
|
* Any other value For future compatibility the callback must do nothing
|
|
* and return true in this case.
|
|
*/
|
|
typedef bool
|
|
(* JSContextCallback)(JSContext *cx, unsigned contextOp, void *data);
|
|
|
|
typedef enum JSGCStatus {
|
|
JSGC_BEGIN,
|
|
JSGC_END
|
|
} JSGCStatus;
|
|
|
|
typedef void
|
|
(* JSGCCallback)(JSRuntime *rt, JSGCStatus status, void *data);
|
|
|
|
typedef enum JSFinalizeStatus {
|
|
/*
|
|
* Called when preparing to sweep a group of compartments, before anything
|
|
* has been swept. The collector will not yield to the mutator before
|
|
* calling the callback with JSFINALIZE_GROUP_END status.
|
|
*/
|
|
JSFINALIZE_GROUP_START,
|
|
|
|
/*
|
|
* Called when preparing to sweep a group of compartments. Weak references
|
|
* to unmarked things have been removed and things that are not swept
|
|
* incrementally have been finalized at this point. The collector may yield
|
|
* to the mutator after this point.
|
|
*/
|
|
JSFINALIZE_GROUP_END,
|
|
|
|
/*
|
|
* Called at the end of collection when everything has been swept.
|
|
*/
|
|
JSFINALIZE_COLLECTION_END
|
|
} JSFinalizeStatus;
|
|
|
|
typedef void
|
|
(* JSFinalizeCallback)(JSFreeOp *fop, JSFinalizeStatus status, bool isCompartment);
|
|
|
|
typedef bool
|
|
(* JSInterruptCallback)(JSContext *cx);
|
|
|
|
typedef void
|
|
(* JSErrorReporter)(JSContext *cx, const char *message, JSErrorReport *report);
|
|
|
|
#ifdef MOZ_TRACE_JSCALLS
|
|
typedef void
|
|
(* JSFunctionCallback)(const JSFunction *fun,
|
|
const JSScript *scr,
|
|
const JSContext *cx,
|
|
int entering);
|
|
#endif
|
|
|
|
/*
|
|
* Possible exception types. These types are part of a JSErrorFormatString
|
|
* structure. They define which error to throw in case of a runtime error.
|
|
* JSEXN_NONE marks an unthrowable error.
|
|
*/
|
|
typedef enum JSExnType {
|
|
JSEXN_NONE = -1,
|
|
JSEXN_ERR,
|
|
JSEXN_INTERNALERR,
|
|
JSEXN_EVALERR,
|
|
JSEXN_RANGEERR,
|
|
JSEXN_REFERENCEERR,
|
|
JSEXN_SYNTAXERR,
|
|
JSEXN_TYPEERR,
|
|
JSEXN_URIERR,
|
|
JSEXN_LIMIT
|
|
} JSExnType;
|
|
|
|
typedef struct JSErrorFormatString {
|
|
/* The error format string in ASCII. */
|
|
const char *format;
|
|
|
|
/* The number of arguments to expand in the formatted error message. */
|
|
uint16_t argCount;
|
|
|
|
/* One of the JSExnType constants above. */
|
|
int16_t exnType;
|
|
} JSErrorFormatString;
|
|
|
|
typedef const JSErrorFormatString *
|
|
(* JSErrorCallback)(void *userRef, const char *locale,
|
|
const unsigned errorNumber);
|
|
|
|
typedef bool
|
|
(* JSLocaleToUpperCase)(JSContext *cx, JS::HandleString src, JS::MutableHandleValue rval);
|
|
|
|
typedef bool
|
|
(* JSLocaleToLowerCase)(JSContext *cx, JS::HandleString src, JS::MutableHandleValue rval);
|
|
|
|
typedef bool
|
|
(* JSLocaleCompare)(JSContext *cx, JS::HandleString src1, JS::HandleString src2,
|
|
JS::MutableHandleValue rval);
|
|
|
|
typedef bool
|
|
(* JSLocaleToUnicode)(JSContext *cx, const char *src, JS::MutableHandleValue rval);
|
|
|
|
/*
|
|
* Callback used to ask the embedding for the cross compartment wrapper handler
|
|
* that implements the desired prolicy for this kind of object in the
|
|
* destination compartment. |obj| is the object to be wrapped. If |existing| is
|
|
* non-nullptr, it will point to an existing wrapper object that should be
|
|
* re-used if possible. |existing| is guaranteed to be a cross-compartment
|
|
* wrapper with a lazily-defined prototype and the correct global. It is
|
|
* guaranteed not to wrap a function.
|
|
*/
|
|
typedef JSObject *
|
|
(* JSWrapObjectCallback)(JSContext *cx, JS::HandleObject existing, JS::HandleObject obj,
|
|
JS::HandleObject proto, JS::HandleObject parent,
|
|
unsigned flags);
|
|
|
|
/*
|
|
* Callback used by the wrap hook to ask the embedding to prepare an object
|
|
* for wrapping in a context. This might include unwrapping other wrappers
|
|
* or even finding a more suitable object for the new compartment.
|
|
*/
|
|
typedef JSObject *
|
|
(* JSPreWrapCallback)(JSContext *cx, JS::HandleObject scope, JS::HandleObject obj,
|
|
unsigned flags);
|
|
|
|
struct JSWrapObjectCallbacks
|
|
{
|
|
JSWrapObjectCallback wrap;
|
|
JSPreWrapCallback preWrap;
|
|
};
|
|
|
|
typedef void
|
|
(* JSDestroyCompartmentCallback)(JSFreeOp *fop, JSCompartment *compartment);
|
|
|
|
typedef void
|
|
(* JSZoneCallback)(JS::Zone *zone);
|
|
|
|
typedef void
|
|
(* JSCompartmentNameCallback)(JSRuntime *rt, JSCompartment *compartment,
|
|
char *buf, size_t bufsize);
|
|
|
|
/************************************************************************/
|
|
|
|
static MOZ_ALWAYS_INLINE jsval
|
|
JS_NumberValue(double d)
|
|
{
|
|
int32_t i;
|
|
d = JS::CanonicalizeNaN(d);
|
|
if (mozilla::NumberIsInt32(d, &i))
|
|
return INT_TO_JSVAL(i);
|
|
return DOUBLE_TO_JSVAL(d);
|
|
}
|
|
|
|
/************************************************************************/
|
|
|
|
JS_PUBLIC_API(bool)
|
|
JS_StringHasBeenInterned(JSContext *cx, JSString *str);
|
|
|
|
/*
|
|
* Only JSStrings that have been interned via the JSAPI can be turned into
|
|
* jsids by API clients.
|
|
*
|
|
* N.B. if a jsid is backed by a string which has not been interned, that
|
|
* string must be appropriately rooted to avoid being collected by the GC.
|
|
*/
|
|
JS_PUBLIC_API(jsid)
|
|
INTERNED_STRING_TO_JSID(JSContext *cx, JSString *str);
|
|
|
|
/*
|
|
* Returns true iff the given jsval is immune to GC and can be used across
|
|
* multiple JSRuntimes without requiring any conversion API.
|
|
*/
|
|
static MOZ_ALWAYS_INLINE bool
|
|
JSVAL_IS_UNIVERSAL(jsval v)
|
|
{
|
|
return !JSVAL_IS_GCTHING(v);
|
|
}
|
|
|
|
namespace JS {
|
|
|
|
class AutoIdRooter : private AutoGCRooter
|
|
{
|
|
public:
|
|
explicit AutoIdRooter(JSContext *cx, jsid aId = INT_TO_JSID(0)
|
|
MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
|
|
: AutoGCRooter(cx, ID), id_(aId)
|
|
{
|
|
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
|
|
}
|
|
|
|
jsid id() {
|
|
return id_;
|
|
}
|
|
|
|
jsid * addr() {
|
|
return &id_;
|
|
}
|
|
|
|
friend void AutoGCRooter::trace(JSTracer *trc);
|
|
|
|
private:
|
|
jsid id_;
|
|
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
|
|
};
|
|
|
|
// Container class for passing in script source buffers to the JS engine. This
|
|
// not only groups the buffer and length values, it also provides a way to
|
|
// optionally pass ownership of the buffer to the JS engine without copying.
|
|
// Rules for use:
|
|
//
|
|
// 1) The data array must be allocated with js_malloc() or js_realloc() if
|
|
// ownership is being granted to the SourceBufferHolder.
|
|
// 2) If ownership is not given to the SourceBufferHolder, then the memory
|
|
// must be kept alive until the JS compilation is complete.
|
|
// 3) Any code calling SourceBufferHolder::take() must guarantee to keep the
|
|
// memory alive until JS compilation completes. Normally only the JS
|
|
// engine should be calling take().
|
|
//
|
|
// Example use:
|
|
//
|
|
// size_t length = 512;
|
|
// jschar* chars = static_cast<jschar*>(js_malloc(sizeof(jschar) * length));
|
|
// JS::SourceBufferHolder srcBuf(chars, length, JS::SourceBufferHolder::GiveOwnership);
|
|
// JS::Compile(cx, obj, options, srcBuf);
|
|
//
|
|
class MOZ_STACK_CLASS SourceBufferHolder MOZ_FINAL
|
|
{
|
|
public:
|
|
enum Ownership {
|
|
NoOwnership,
|
|
GiveOwnership
|
|
};
|
|
|
|
SourceBufferHolder(const jschar *data, size_t dataLength, Ownership ownership)
|
|
: data_(data),
|
|
length_(dataLength),
|
|
ownsChars_(ownership == GiveOwnership)
|
|
{
|
|
// Ensure that null buffers properly return an unowned, empty,
|
|
// null-terminated string.
|
|
static const jschar NullChar_ = 0;
|
|
if (!get()) {
|
|
data_ = &NullChar_;
|
|
length_ = 0;
|
|
ownsChars_ = false;
|
|
}
|
|
}
|
|
|
|
~SourceBufferHolder() {
|
|
if (ownsChars_)
|
|
js_free(const_cast<jschar *>(data_));
|
|
}
|
|
|
|
// Access the underlying source buffer without affecting ownership.
|
|
const jschar *get() const { return data_; }
|
|
|
|
// Length of the source buffer in jschars (not bytes)
|
|
size_t length() const { return length_; }
|
|
|
|
// Returns true if the SourceBufferHolder owns the buffer and will free
|
|
// it upon destruction. If true, it is legal to call take().
|
|
bool ownsChars() const { return ownsChars_; }
|
|
|
|
// Retrieve and take ownership of the underlying data buffer. The caller
|
|
// is now responsible for calling js_free() on the returned value, *but only
|
|
// after JS script compilation has completed*.
|
|
//
|
|
// After the buffer has been taken the SourceBufferHolder functions as if
|
|
// it had been constructed on an unowned buffer; get() and length() still
|
|
// work. In order for this to be safe the taken buffer must be kept alive
|
|
// until after JS script compilation completes as noted above.
|
|
//
|
|
// Note, it's the caller's responsibility to check ownsChars() before taking
|
|
// the buffer. Taking and then free'ing an unowned buffer will have dire
|
|
// consequences.
|
|
jschar *take() {
|
|
JS_ASSERT(ownsChars_);
|
|
ownsChars_ = false;
|
|
return const_cast<jschar *>(data_);
|
|
}
|
|
|
|
private:
|
|
SourceBufferHolder(SourceBufferHolder &) MOZ_DELETE;
|
|
SourceBufferHolder &operator=(SourceBufferHolder &) MOZ_DELETE;
|
|
|
|
const jschar *data_;
|
|
size_t length_;
|
|
bool ownsChars_;
|
|
};
|
|
|
|
} /* namespace JS */
|
|
|
|
/************************************************************************/
|
|
|
|
/* Property attributes, set in JSPropertySpec and passed to API functions. */
|
|
#define JSPROP_ENUMERATE 0x01 /* property is visible to for/in loop */
|
|
#define JSPROP_READONLY 0x02 /* not settable: assignment is no-op.
|
|
This flag is only valid when neither
|
|
JSPROP_GETTER nor JSPROP_SETTER is
|
|
set. */
|
|
#define JSPROP_PERMANENT 0x04 /* property cannot be deleted */
|
|
#define JSPROP_NATIVE_ACCESSORS 0x08 /* set in JSPropertyDescriptor.flags
|
|
if getters/setters are JSNatives */
|
|
#define JSPROP_GETTER 0x10 /* property holds getter function */
|
|
#define JSPROP_SETTER 0x20 /* property holds setter function */
|
|
#define JSPROP_SHARED 0x40 /* don't allocate a value slot for this
|
|
property; don't copy the property on
|
|
set of the same-named property in an
|
|
object that delegates to a prototype
|
|
containing this property */
|
|
#define JSPROP_INDEX 0x80 /* name is actually (int) index */
|
|
|
|
#define JSFUN_STUB_GSOPS 0x200 /* use JS_PropertyStub getter/setter
|
|
instead of defaulting to class gsops
|
|
for property holding function */
|
|
|
|
#define JSFUN_CONSTRUCTOR 0x400 /* native that can be called as a ctor */
|
|
|
|
|
|
/*
|
|
* Specify a generic native prototype methods, i.e., methods of a class
|
|
* prototype that are exposed as static methods taking an extra leading
|
|
* argument: the generic |this| parameter.
|
|
*
|
|
* If you set this flag in a JSFunctionSpec struct's flags initializer, then
|
|
* that struct must live at least as long as the native static method object
|
|
* created due to this flag by JS_DefineFunctions or JS_InitClass. Typically
|
|
* JSFunctionSpec structs are allocated in static arrays.
|
|
*/
|
|
#define JSFUN_GENERIC_NATIVE 0x800
|
|
|
|
#define JSFUN_FLAGS_MASK 0xe00 /* | of all the JSFUN_* flags */
|
|
|
|
/*
|
|
* The first call to JS_CallOnce by any thread in a process will call 'func'.
|
|
* Later calls to JS_CallOnce with the same JSCallOnceType object will be
|
|
* suppressed.
|
|
*
|
|
* Equivalently: each distinct JSCallOnceType object will allow one JS_CallOnce
|
|
* to invoke its JSInitCallback.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_CallOnce(JSCallOnceType *once, JSInitCallback func);
|
|
|
|
/* Microseconds since the epoch, midnight, January 1, 1970 UTC. */
|
|
extern JS_PUBLIC_API(int64_t)
|
|
JS_Now(void);
|
|
|
|
/* Don't want to export data, so provide accessors for non-inline jsvals. */
|
|
extern JS_PUBLIC_API(jsval)
|
|
JS_GetNaNValue(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(jsval)
|
|
JS_GetNegativeInfinityValue(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(jsval)
|
|
JS_GetPositiveInfinityValue(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(jsval)
|
|
JS_GetEmptyStringValue(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_GetEmptyString(JSRuntime *rt);
|
|
|
|
/*
|
|
* Format is a string of the following characters (spaces are insignificant),
|
|
* specifying the tabulated type conversions:
|
|
*
|
|
* b bool Boolean
|
|
* c uint16_t/jschar ECMA uint16_t, Unicode char
|
|
* i int32_t ECMA int32_t
|
|
* j int32_t ECMA int32_t (used to be different)
|
|
* u uint32_t ECMA uint32_t
|
|
* d double IEEE double
|
|
* I double Integral IEEE double
|
|
* S JSString * Unicode string, accessed by a JSString pointer
|
|
* W jschar * Unicode character vector, 0-terminated (W for wide)
|
|
* o JSObject * Object reference
|
|
* f JSFunction * Function private
|
|
* v jsval Argument value (no conversion)
|
|
* * N/A Skip this argument (no vararg)
|
|
* / N/A End of required arguments
|
|
*
|
|
* The variable argument list after format must consist of &b, &c, &s, e.g.,
|
|
* where those variables have the types given above. For the pointer types
|
|
* char *, JSString *, and JSObject *, the pointed-at memory returned belongs
|
|
* to the JS runtime, not to the calling native code. The runtime promises
|
|
* to keep this memory valid so long as argv refers to allocated stack space
|
|
* (so long as the native function is active).
|
|
*
|
|
* Fewer arguments than format specifies may be passed only if there is a /
|
|
* in format after the last required argument specifier and argc is at least
|
|
* the number of required arguments. More arguments than format specifies
|
|
* may be passed without error; it is up to the caller to deal with trailing
|
|
* unconverted arguments.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ConvertArguments(JSContext *cx, const JS::CallArgs &args, const char *format, ...);
|
|
|
|
#ifdef va_start
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ConvertArgumentsVA(JSContext *cx, const JS::CallArgs &args, const char *format,
|
|
va_list ap);
|
|
#endif
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ConvertValue(JSContext *cx, JS::HandleValue v, JSType type, JS::MutableHandleValue vp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ValueToObject(JSContext *cx, JS::HandleValue v, JS::MutableHandleObject objp);
|
|
|
|
extern JS_PUBLIC_API(JSFunction *)
|
|
JS_ValueToFunction(JSContext *cx, JS::HandleValue v);
|
|
|
|
extern JS_PUBLIC_API(JSFunction *)
|
|
JS_ValueToConstructor(JSContext *cx, JS::HandleValue v);
|
|
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_ValueToSource(JSContext *cx, JS::Handle<JS::Value> v);
|
|
|
|
namespace js {
|
|
/*
|
|
* DO NOT CALL THIS. Use JS::ToNumber
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
ToNumberSlow(JSContext *cx, JS::Value v, double *dp);
|
|
|
|
/*
|
|
* DO NOT CALL THIS. Use JS::ToBoolean
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
ToBooleanSlow(JS::HandleValue v);
|
|
|
|
/*
|
|
* DO NOT CALL THIS. Use JS::ToString
|
|
*/
|
|
extern JS_PUBLIC_API(JSString*)
|
|
ToStringSlow(JSContext *cx, JS::HandleValue v);
|
|
} /* namespace js */
|
|
|
|
namespace JS {
|
|
|
|
/* ES5 9.3 ToNumber. */
|
|
MOZ_ALWAYS_INLINE bool
|
|
ToNumber(JSContext *cx, HandleValue v, double *out)
|
|
{
|
|
AssertArgumentsAreSane(cx, v);
|
|
|
|
if (v.isNumber()) {
|
|
*out = v.toNumber();
|
|
return true;
|
|
}
|
|
return js::ToNumberSlow(cx, v, out);
|
|
}
|
|
|
|
MOZ_ALWAYS_INLINE bool
|
|
ToBoolean(HandleValue v)
|
|
{
|
|
if (v.isBoolean())
|
|
return v.toBoolean();
|
|
if (v.isInt32())
|
|
return v.toInt32() != 0;
|
|
if (v.isNullOrUndefined())
|
|
return false;
|
|
if (v.isDouble()) {
|
|
double d = v.toDouble();
|
|
return !mozilla::IsNaN(d) && d != 0;
|
|
}
|
|
|
|
/* The slow path handles strings and objects. */
|
|
return js::ToBooleanSlow(v);
|
|
}
|
|
|
|
MOZ_ALWAYS_INLINE JSString*
|
|
ToString(JSContext *cx, HandleValue v)
|
|
{
|
|
if (v.isString())
|
|
return v.toString();
|
|
return js::ToStringSlow(cx, v);
|
|
}
|
|
|
|
} /* namespace JS */
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DoubleIsInt32(double d, int32_t *ip);
|
|
|
|
extern JS_PUBLIC_API(int32_t)
|
|
JS_DoubleToInt32(double d);
|
|
|
|
extern JS_PUBLIC_API(uint32_t)
|
|
JS_DoubleToUint32(double d);
|
|
|
|
|
|
namespace js {
|
|
/* DO NOT CALL THIS. Use JS::ToUint16. */
|
|
extern JS_PUBLIC_API(bool)
|
|
ToUint16Slow(JSContext *cx, JS::HandleValue v, uint16_t *out);
|
|
|
|
/* DO NOT CALL THIS. Use JS::ToInt32. */
|
|
extern JS_PUBLIC_API(bool)
|
|
ToInt32Slow(JSContext *cx, JS::HandleValue v, int32_t *out);
|
|
|
|
/* DO NOT CALL THIS. Use JS::ToUint32. */
|
|
extern JS_PUBLIC_API(bool)
|
|
ToUint32Slow(JSContext *cx, JS::HandleValue v, uint32_t *out);
|
|
|
|
/* DO NOT CALL THIS. Use JS::ToInt64. */
|
|
extern JS_PUBLIC_API(bool)
|
|
ToInt64Slow(JSContext *cx, JS::HandleValue v, int64_t *out);
|
|
|
|
/* DO NOT CALL THIS. Use JS::ToUint64. */
|
|
extern JS_PUBLIC_API(bool)
|
|
ToUint64Slow(JSContext *cx, JS::HandleValue v, uint64_t *out);
|
|
} /* namespace js */
|
|
|
|
namespace JS {
|
|
|
|
MOZ_ALWAYS_INLINE bool
|
|
ToUint16(JSContext *cx, JS::HandleValue v, uint16_t *out)
|
|
{
|
|
AssertArgumentsAreSane(cx, v);
|
|
|
|
if (v.isInt32()) {
|
|
*out = uint16_t(v.toInt32());
|
|
return true;
|
|
}
|
|
return js::ToUint16Slow(cx, v, out);
|
|
}
|
|
|
|
MOZ_ALWAYS_INLINE bool
|
|
ToInt32(JSContext *cx, JS::HandleValue v, int32_t *out)
|
|
{
|
|
AssertArgumentsAreSane(cx, v);
|
|
|
|
if (v.isInt32()) {
|
|
*out = v.toInt32();
|
|
return true;
|
|
}
|
|
return js::ToInt32Slow(cx, v, out);
|
|
}
|
|
|
|
MOZ_ALWAYS_INLINE bool
|
|
ToUint32(JSContext *cx, JS::HandleValue v, uint32_t *out)
|
|
{
|
|
AssertArgumentsAreSane(cx, v);
|
|
|
|
if (v.isInt32()) {
|
|
*out = uint32_t(v.toInt32());
|
|
return true;
|
|
}
|
|
return js::ToUint32Slow(cx, v, out);
|
|
}
|
|
|
|
MOZ_ALWAYS_INLINE bool
|
|
ToInt64(JSContext *cx, JS::HandleValue v, int64_t *out)
|
|
{
|
|
AssertArgumentsAreSane(cx, v);
|
|
|
|
if (v.isInt32()) {
|
|
*out = int64_t(v.toInt32());
|
|
return true;
|
|
}
|
|
return js::ToInt64Slow(cx, v, out);
|
|
}
|
|
|
|
MOZ_ALWAYS_INLINE bool
|
|
ToUint64(JSContext *cx, JS::HandleValue v, uint64_t *out)
|
|
{
|
|
AssertArgumentsAreSane(cx, v);
|
|
|
|
if (v.isInt32()) {
|
|
/* Account for sign extension of negatives into the longer 64bit space. */
|
|
*out = uint64_t(int64_t(v.toInt32()));
|
|
return true;
|
|
}
|
|
return js::ToUint64Slow(cx, v, out);
|
|
}
|
|
|
|
|
|
} /* namespace JS */
|
|
|
|
extern JS_PUBLIC_API(JSType)
|
|
JS_TypeOfValue(JSContext *cx, JS::Handle<JS::Value> v);
|
|
|
|
extern JS_PUBLIC_API(const char *)
|
|
JS_GetTypeName(JSContext *cx, JSType type);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_StrictlyEqual(JSContext *cx, jsval v1, jsval v2, bool *equal);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_LooselyEqual(JSContext *cx, JS::Handle<JS::Value> v1, JS::Handle<JS::Value> v2, bool *equal);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_SameValue(JSContext *cx, jsval v1, jsval v2, bool *same);
|
|
|
|
/* True iff fun is the global eval function. */
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IsBuiltinEvalFunction(JSFunction *fun);
|
|
|
|
/* True iff fun is the Function constructor. */
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IsBuiltinFunctionConstructor(JSFunction *fun);
|
|
|
|
/************************************************************************/
|
|
|
|
/*
|
|
* Initialization, locking, contexts, and memory allocation.
|
|
*
|
|
* It is important that the first runtime and first context be created in a
|
|
* single-threaded fashion, otherwise the behavior of the library is undefined.
|
|
* See: http://developer.mozilla.org/en/docs/Category:JSAPI_Reference
|
|
*/
|
|
|
|
typedef enum JSUseHelperThreads
|
|
{
|
|
JS_NO_HELPER_THREADS,
|
|
JS_USE_HELPER_THREADS
|
|
} JSUseHelperThreads;
|
|
|
|
/**
|
|
* Initialize SpiderMonkey, returning true only if initialization succeeded.
|
|
* Once this method has succeeded, it is safe to call JS_NewRuntime and other
|
|
* JSAPI methods.
|
|
*
|
|
* This method must be called before any other JSAPI method is used on any
|
|
* thread. Once it has been used, it is safe to call any JSAPI method, and it
|
|
* remains safe to do so until JS_ShutDown is correctly called.
|
|
*
|
|
* It is currently not possible to initialize SpiderMonkey multiple times (that
|
|
* is, calling JS_Init/JSAPI methods/JS_ShutDown in that order, then doing so
|
|
* again). This restriction may eventually be lifted.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_Init(void);
|
|
|
|
/**
|
|
* Destroy free-standing resources allocated by SpiderMonkey, not associated
|
|
* with any runtime, context, or other structure.
|
|
*
|
|
* This method should be called after all other JSAPI data has been properly
|
|
* cleaned up: every new runtime must have been destroyed, every new context
|
|
* must have been destroyed, and so on. Calling this method before all other
|
|
* resources have been destroyed has undefined behavior.
|
|
*
|
|
* Failure to call this method, at present, has no adverse effects other than
|
|
* leaking memory. This may not always be the case; it's recommended that all
|
|
* embedders call this method when all other JSAPI operations have completed.
|
|
*
|
|
* It is currently not possible to initialize SpiderMonkey multiple times (that
|
|
* is, calling JS_Init/JSAPI methods/JS_ShutDown in that order, then doing so
|
|
* again). This restriction may eventually be lifted.
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
JS_ShutDown(void);
|
|
|
|
extern JS_PUBLIC_API(JSRuntime *)
|
|
JS_NewRuntime(uint32_t maxbytes, JSUseHelperThreads useHelperThreads,
|
|
JSRuntime *parentRuntime = nullptr);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_DestroyRuntime(JSRuntime *rt);
|
|
|
|
// These are equivalent to ICU's |UMemAllocFn|, |UMemReallocFn|, and
|
|
// |UMemFreeFn| types. The first argument (called |context| in the ICU docs)
|
|
// will always be nullptr, and should be ignored.
|
|
typedef void *(*JS_ICUAllocFn)(const void *, size_t size);
|
|
typedef void *(*JS_ICUReallocFn)(const void *, void *p, size_t size);
|
|
typedef void (*JS_ICUFreeFn)(const void *, void *p);
|
|
|
|
// This function can be used to track memory used by ICU.
|
|
// Do not use it unless you know what you are doing!
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_SetICUMemoryFunctions(JS_ICUAllocFn allocFn, JS_ICUReallocFn reallocFn, JS_ICUFreeFn freeFn);
|
|
|
|
JS_PUBLIC_API(void *)
|
|
JS_GetRuntimePrivate(JSRuntime *rt);
|
|
|
|
extern JS_PUBLIC_API(JSRuntime *)
|
|
JS_GetRuntime(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(JSRuntime *)
|
|
JS_GetParentRuntime(JSContext *cx);
|
|
|
|
JS_PUBLIC_API(void)
|
|
JS_SetRuntimePrivate(JSRuntime *rt, void *data);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_BeginRequest(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_EndRequest(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IsInRequest(JSRuntime *rt);
|
|
|
|
namespace js {
|
|
|
|
void
|
|
AssertHeapIsIdle(JSRuntime *rt);
|
|
|
|
void
|
|
AssertHeapIsIdle(JSContext *cx);
|
|
|
|
} /* namespace js */
|
|
|
|
class JSAutoRequest
|
|
{
|
|
public:
|
|
JSAutoRequest(JSContext *cx
|
|
MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
|
|
: mContext(cx)
|
|
{
|
|
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
|
|
JS_BeginRequest(mContext);
|
|
}
|
|
~JSAutoRequest() {
|
|
JS_EndRequest(mContext);
|
|
}
|
|
|
|
protected:
|
|
JSContext *mContext;
|
|
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
|
|
|
|
#if 0
|
|
private:
|
|
static void *operator new(size_t) CPP_THROW_NEW { return 0; };
|
|
static void operator delete(void *, size_t) { };
|
|
#endif
|
|
};
|
|
|
|
class JSAutoCheckRequest
|
|
{
|
|
public:
|
|
JSAutoCheckRequest(JSContext *cx
|
|
MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
|
|
{
|
|
#if defined JS_THREADSAFE && defined JS_DEBUG
|
|
mContext = cx;
|
|
JS_ASSERT(JS_IsInRequest(JS_GetRuntime(cx)));
|
|
#endif
|
|
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
|
|
}
|
|
|
|
~JSAutoCheckRequest() {
|
|
#if defined JS_THREADSAFE && defined JS_DEBUG
|
|
JS_ASSERT(JS_IsInRequest(JS_GetRuntime(mContext)));
|
|
#endif
|
|
}
|
|
|
|
|
|
private:
|
|
#if defined JS_THREADSAFE && defined JS_DEBUG
|
|
JSContext *mContext;
|
|
#endif
|
|
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
|
|
};
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetContextCallback(JSRuntime *rt, JSContextCallback cxCallback, void *data);
|
|
|
|
extern JS_PUBLIC_API(JSContext *)
|
|
JS_NewContext(JSRuntime *rt, size_t stackChunkSize);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_DestroyContext(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_DestroyContextNoGC(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(void *)
|
|
JS_GetContextPrivate(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetContextPrivate(JSContext *cx, void *data);
|
|
|
|
extern JS_PUBLIC_API(void *)
|
|
JS_GetSecondContextPrivate(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetSecondContextPrivate(JSContext *cx, void *data);
|
|
|
|
extern JS_PUBLIC_API(JSRuntime *)
|
|
JS_GetRuntime(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(JSContext *)
|
|
JS_ContextIterator(JSRuntime *rt, JSContext **iterp);
|
|
|
|
extern JS_PUBLIC_API(JSVersion)
|
|
JS_GetVersion(JSContext *cx);
|
|
|
|
// Mutate the version on the compartment. This is generally discouraged, but
|
|
// necessary to support the version mutation in the js and xpc shell command
|
|
// set.
|
|
//
|
|
// It would be nice to put this in jsfriendapi, but the linkage requirements
|
|
// of the shells make that impossible.
|
|
JS_PUBLIC_API(void)
|
|
JS_SetVersionForCompartment(JSCompartment *compartment, JSVersion version);
|
|
|
|
extern JS_PUBLIC_API(const char *)
|
|
JS_VersionToString(JSVersion version);
|
|
|
|
extern JS_PUBLIC_API(JSVersion)
|
|
JS_StringToVersion(const char *string);
|
|
|
|
namespace JS {
|
|
|
|
class JS_PUBLIC_API(RuntimeOptions) {
|
|
public:
|
|
RuntimeOptions()
|
|
: baseline_(false),
|
|
ion_(false),
|
|
asmJS_(false)
|
|
{
|
|
}
|
|
|
|
bool baseline() const { return baseline_; }
|
|
RuntimeOptions &setBaseline(bool flag) {
|
|
baseline_ = flag;
|
|
return *this;
|
|
}
|
|
RuntimeOptions &toggleBaseline() {
|
|
baseline_ = !baseline_;
|
|
return *this;
|
|
}
|
|
|
|
bool ion() const { return ion_; }
|
|
RuntimeOptions &setIon(bool flag) {
|
|
ion_ = flag;
|
|
return *this;
|
|
}
|
|
RuntimeOptions &toggleIon() {
|
|
ion_ = !ion_;
|
|
return *this;
|
|
}
|
|
|
|
bool asmJS() const { return asmJS_; }
|
|
RuntimeOptions &setAsmJS(bool flag) {
|
|
asmJS_ = flag;
|
|
return *this;
|
|
}
|
|
RuntimeOptions &toggleAsmJS() {
|
|
asmJS_ = !asmJS_;
|
|
return *this;
|
|
}
|
|
|
|
private:
|
|
bool baseline_ : 1;
|
|
bool ion_ : 1;
|
|
bool asmJS_ : 1;
|
|
};
|
|
|
|
JS_PUBLIC_API(RuntimeOptions &)
|
|
RuntimeOptionsRef(JSRuntime *rt);
|
|
|
|
JS_PUBLIC_API(RuntimeOptions &)
|
|
RuntimeOptionsRef(JSContext *cx);
|
|
|
|
class JS_PUBLIC_API(ContextOptions) {
|
|
public:
|
|
ContextOptions()
|
|
: extraWarnings_(false),
|
|
werror_(false),
|
|
varObjFix_(false),
|
|
privateIsNSISupports_(false),
|
|
dontReportUncaught_(false),
|
|
noDefaultCompartmentObject_(false),
|
|
noScriptRval_(false),
|
|
strictMode_(false),
|
|
cloneSingletons_(false)
|
|
{
|
|
}
|
|
|
|
bool extraWarnings() const { return extraWarnings_; }
|
|
ContextOptions &setExtraWarnings(bool flag) {
|
|
extraWarnings_ = flag;
|
|
return *this;
|
|
}
|
|
ContextOptions &toggleExtraWarnings() {
|
|
extraWarnings_ = !extraWarnings_;
|
|
return *this;
|
|
}
|
|
|
|
bool werror() const { return werror_; }
|
|
ContextOptions &setWerror(bool flag) {
|
|
werror_ = flag;
|
|
return *this;
|
|
}
|
|
ContextOptions &toggleWerror() {
|
|
werror_ = !werror_;
|
|
return *this;
|
|
}
|
|
|
|
bool varObjFix() const { return varObjFix_; }
|
|
ContextOptions &setVarObjFix(bool flag) {
|
|
varObjFix_ = flag;
|
|
return *this;
|
|
}
|
|
ContextOptions &toggleVarObjFix() {
|
|
varObjFix_ = !varObjFix_;
|
|
return *this;
|
|
}
|
|
|
|
bool privateIsNSISupports() const { return privateIsNSISupports_; }
|
|
ContextOptions &setPrivateIsNSISupports(bool flag) {
|
|
privateIsNSISupports_ = flag;
|
|
return *this;
|
|
}
|
|
ContextOptions &togglePrivateIsNSISupports() {
|
|
privateIsNSISupports_ = !privateIsNSISupports_;
|
|
return *this;
|
|
}
|
|
|
|
bool dontReportUncaught() const { return dontReportUncaught_; }
|
|
ContextOptions &setDontReportUncaught(bool flag) {
|
|
dontReportUncaught_ = flag;
|
|
return *this;
|
|
}
|
|
ContextOptions &toggleDontReportUncaught() {
|
|
dontReportUncaught_ = !dontReportUncaught_;
|
|
return *this;
|
|
}
|
|
|
|
bool noDefaultCompartmentObject() const { return noDefaultCompartmentObject_; }
|
|
ContextOptions &setNoDefaultCompartmentObject(bool flag) {
|
|
noDefaultCompartmentObject_ = flag;
|
|
return *this;
|
|
}
|
|
ContextOptions &toggleNoDefaultCompartmentObject() {
|
|
noDefaultCompartmentObject_ = !noDefaultCompartmentObject_;
|
|
return *this;
|
|
}
|
|
|
|
bool noScriptRval() const { return noScriptRval_; }
|
|
ContextOptions &setNoScriptRval(bool flag) {
|
|
noScriptRval_ = flag;
|
|
return *this;
|
|
}
|
|
ContextOptions &toggleNoScriptRval() {
|
|
noScriptRval_ = !noScriptRval_;
|
|
return *this;
|
|
}
|
|
|
|
bool strictMode() const { return strictMode_; }
|
|
ContextOptions &setStrictMode(bool flag) {
|
|
strictMode_ = flag;
|
|
return *this;
|
|
}
|
|
ContextOptions &toggleStrictMode() {
|
|
strictMode_ = !strictMode_;
|
|
return *this;
|
|
}
|
|
|
|
bool cloneSingletons() const { return cloneSingletons_; }
|
|
ContextOptions &setCloneSingletons(bool flag) {
|
|
cloneSingletons_ = flag;
|
|
return *this;
|
|
}
|
|
ContextOptions &toggleCloneSingletons() {
|
|
cloneSingletons_ = !cloneSingletons_;
|
|
return *this;
|
|
}
|
|
|
|
private:
|
|
bool extraWarnings_ : 1;
|
|
bool werror_ : 1;
|
|
bool varObjFix_ : 1;
|
|
bool privateIsNSISupports_ : 1;
|
|
bool dontReportUncaught_ : 1;
|
|
bool noDefaultCompartmentObject_ : 1;
|
|
bool noScriptRval_ : 1;
|
|
bool strictMode_ : 1;
|
|
bool cloneSingletons_ : 1;
|
|
};
|
|
|
|
JS_PUBLIC_API(ContextOptions &)
|
|
ContextOptionsRef(JSContext *cx);
|
|
|
|
class JS_PUBLIC_API(AutoSaveContextOptions) {
|
|
public:
|
|
AutoSaveContextOptions(JSContext *cx)
|
|
: cx_(cx),
|
|
oldOptions_(ContextOptionsRef(cx_))
|
|
{
|
|
}
|
|
|
|
~AutoSaveContextOptions()
|
|
{
|
|
ContextOptionsRef(cx_) = oldOptions_;
|
|
}
|
|
|
|
private:
|
|
JSContext *cx_;
|
|
JS::ContextOptions oldOptions_;
|
|
};
|
|
|
|
} /* namespace JS */
|
|
|
|
extern JS_PUBLIC_API(const char *)
|
|
JS_GetImplementationVersion(void);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetDestroyCompartmentCallback(JSRuntime *rt, JSDestroyCompartmentCallback callback);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetDestroyZoneCallback(JSRuntime *rt, JSZoneCallback callback);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetSweepZoneCallback(JSRuntime *rt, JSZoneCallback callback);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetCompartmentNameCallback(JSRuntime *rt, JSCompartmentNameCallback callback);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetWrapObjectCallbacks(JSRuntime *rt, const JSWrapObjectCallbacks *callbacks);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetCompartmentPrivate(JSCompartment *compartment, void *data);
|
|
|
|
extern JS_PUBLIC_API(void *)
|
|
JS_GetCompartmentPrivate(JSCompartment *compartment);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetZoneUserData(JS::Zone *zone, void *data);
|
|
|
|
extern JS_PUBLIC_API(void *)
|
|
JS_GetZoneUserData(JS::Zone *zone);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_WrapObject(JSContext *cx, JS::MutableHandleObject objp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_WrapValue(JSContext *cx, JS::MutableHandleValue vp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_WrapId(JSContext *cx, JS::MutableHandleId idp);
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_TransplantObject(JSContext *cx, JS::HandleObject origobj, JS::HandleObject target);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_RefreshCrossCompartmentWrappers(JSContext *cx, JS::Handle<JSObject*> obj);
|
|
|
|
/*
|
|
* At any time, a JSContext has a current (possibly-nullptr) compartment.
|
|
* Compartments are described in:
|
|
*
|
|
* developer.mozilla.org/en-US/docs/SpiderMonkey/SpiderMonkey_compartments
|
|
*
|
|
* The current compartment of a context may be changed. The preferred way to do
|
|
* this is with JSAutoCompartment:
|
|
*
|
|
* void foo(JSContext *cx, JSObject *obj) {
|
|
* // in some compartment 'c'
|
|
* {
|
|
* JSAutoCompartment ac(cx, obj); // constructor enters
|
|
* // in the compartment of 'obj'
|
|
* } // destructor leaves
|
|
* // back in compartment 'c'
|
|
* }
|
|
*
|
|
* For more complicated uses that don't neatly fit in a C++ stack frame, the
|
|
* compartment can entered and left using separate function calls:
|
|
*
|
|
* void foo(JSContext *cx, JSObject *obj) {
|
|
* // in 'oldCompartment'
|
|
* JSCompartment *oldCompartment = JS_EnterCompartment(cx, obj);
|
|
* // in the compartment of 'obj'
|
|
* JS_LeaveCompartment(cx, oldCompartment);
|
|
* // back in 'oldCompartment'
|
|
* }
|
|
*
|
|
* Note: these calls must still execute in a LIFO manner w.r.t all other
|
|
* enter/leave calls on the context. Furthermore, only the return value of a
|
|
* JS_EnterCompartment call may be passed as the 'oldCompartment' argument of
|
|
* the corresponding JS_LeaveCompartment call.
|
|
*/
|
|
|
|
class JS_PUBLIC_API(JSAutoCompartment)
|
|
{
|
|
JSContext *cx_;
|
|
JSCompartment *oldCompartment_;
|
|
public:
|
|
JSAutoCompartment(JSContext *cx, JSObject *target);
|
|
JSAutoCompartment(JSContext *cx, JSScript *target);
|
|
~JSAutoCompartment();
|
|
};
|
|
|
|
class JS_PUBLIC_API(JSAutoNullCompartment)
|
|
{
|
|
JSContext *cx_;
|
|
JSCompartment *oldCompartment_;
|
|
public:
|
|
JSAutoNullCompartment(JSContext *cx);
|
|
~JSAutoNullCompartment();
|
|
};
|
|
|
|
/* NB: This API is infallible; a nullptr return value does not indicate error. */
|
|
extern JS_PUBLIC_API(JSCompartment *)
|
|
JS_EnterCompartment(JSContext *cx, JSObject *target);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_LeaveCompartment(JSContext *cx, JSCompartment *oldCompartment);
|
|
|
|
typedef void (*JSIterateCompartmentCallback)(JSRuntime *rt, void *data, JSCompartment *compartment);
|
|
|
|
/*
|
|
* This function calls |compartmentCallback| on every compartment. Beware that
|
|
* there is no guarantee that the compartment will survive after the callback
|
|
* returns.
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
JS_IterateCompartments(JSRuntime *rt, void *data,
|
|
JSIterateCompartmentCallback compartmentCallback);
|
|
|
|
/*
|
|
* Initialize standard JS class constructors, prototypes, and any top-level
|
|
* functions and constants associated with the standard classes (e.g. isNaN
|
|
* for Number).
|
|
*
|
|
* NB: This sets cx's global object to obj if it was null.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_InitStandardClasses(JSContext *cx, JS::Handle<JSObject*> obj);
|
|
|
|
/*
|
|
* Resolve id, which must contain either a string or an int, to a standard
|
|
* class name in obj if possible, defining the class's constructor and/or
|
|
* prototype and storing true in *resolved. If id does not name a standard
|
|
* class or a top-level property induced by initializing a standard class,
|
|
* store false in *resolved and just return true. Return false on error,
|
|
* as usual for bool result-typed API entry points.
|
|
*
|
|
* This API can be called directly from a global object class's resolve op,
|
|
* to define standard classes lazily. The class's enumerate op should call
|
|
* JS_EnumerateStandardClasses(cx, obj), to define eagerly during for..in
|
|
* loops any classes not yet resolved lazily.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ResolveStandardClass(JSContext *cx, JS::HandleObject obj, JS::HandleId id, bool *resolved);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_EnumerateStandardClasses(JSContext *cx, JS::HandleObject obj);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_GetClassObject(JSContext *cx, JSProtoKey key, JS::MutableHandle<JSObject*> objp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_GetClassPrototype(JSContext *cx, JSProtoKey key, JS::MutableHandle<JSObject*> objp);
|
|
|
|
namespace JS {
|
|
|
|
/*
|
|
* Determine if the given object is an instance or prototype for a standard
|
|
* class. If so, return the associated JSProtoKey. If not, return JSProto_Null.
|
|
*/
|
|
|
|
extern JS_PUBLIC_API(JSProtoKey)
|
|
IdentifyStandardInstance(JSObject *obj);
|
|
|
|
extern JS_PUBLIC_API(JSProtoKey)
|
|
IdentifyStandardPrototype(JSObject *obj);
|
|
|
|
extern JS_PUBLIC_API(JSProtoKey)
|
|
IdentifyStandardInstanceOrPrototype(JSObject *obj);
|
|
|
|
} /* namespace JS */
|
|
|
|
extern JS_PUBLIC_API(JSProtoKey)
|
|
JS_IdToProtoKey(JSContext *cx, JS::HandleId id);
|
|
|
|
/*
|
|
* Returns the original value of |Function.prototype| from the global object in
|
|
* which |forObj| was created.
|
|
*/
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_GetFunctionPrototype(JSContext *cx, JS::HandleObject forObj);
|
|
|
|
/*
|
|
* Returns the original value of |Object.prototype| from the global object in
|
|
* which |forObj| was created.
|
|
*/
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_GetObjectPrototype(JSContext *cx, JS::HandleObject forObj);
|
|
|
|
/*
|
|
* Returns the original value of |Array.prototype| from the global object in
|
|
* which |forObj| was created.
|
|
*/
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_GetArrayPrototype(JSContext *cx, JS::HandleObject forObj);
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_GetGlobalForObject(JSContext *cx, JSObject *obj);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IsGlobalObject(JSObject *obj);
|
|
|
|
/*
|
|
* May return nullptr, if |c| never had a global (e.g. the atoms compartment),
|
|
* or if |c|'s global has been collected.
|
|
*/
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_GetGlobalForCompartmentOrNull(JSContext *cx, JSCompartment *c);
|
|
|
|
namespace JS {
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
CurrentGlobalOrNull(JSContext *cx);
|
|
|
|
}
|
|
|
|
/*
|
|
* Initialize the 'Reflect' object on a global object.
|
|
*/
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_InitReflect(JSContext *cx, JS::HandleObject global);
|
|
|
|
#ifdef JS_HAS_CTYPES
|
|
/*
|
|
* Initialize the 'ctypes' object on a global variable 'obj'. The 'ctypes'
|
|
* object will be sealed.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_InitCTypesClass(JSContext *cx, JS::HandleObject global);
|
|
|
|
/*
|
|
* Convert a unicode string 'source' of length 'slen' to the platform native
|
|
* charset, returning a null-terminated string allocated with JS_malloc. On
|
|
* failure, this function should report an error.
|
|
*/
|
|
typedef char *
|
|
(* JSCTypesUnicodeToNativeFun)(JSContext *cx, const jschar *source, size_t slen);
|
|
|
|
/*
|
|
* Set of function pointers that ctypes can use for various internal functions.
|
|
* See JS_SetCTypesCallbacks below. Providing nullptr for a function is safe,
|
|
* and will result in the applicable ctypes functionality not being available.
|
|
*/
|
|
struct JSCTypesCallbacks {
|
|
JSCTypesUnicodeToNativeFun unicodeToNative;
|
|
};
|
|
|
|
typedef struct JSCTypesCallbacks JSCTypesCallbacks;
|
|
|
|
/*
|
|
* Set the callbacks on the provided 'ctypesObj' object. 'callbacks' should be a
|
|
* pointer to static data that exists for the lifetime of 'ctypesObj', but it
|
|
* may safely be altered after calling this function and without having
|
|
* to call this function again.
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetCTypesCallbacks(JSObject *ctypesObj, JSCTypesCallbacks *callbacks);
|
|
#endif
|
|
|
|
typedef bool
|
|
(* JSEnumerateDiagnosticMemoryCallback)(void *ptr, size_t length);
|
|
|
|
/*
|
|
* Enumerate memory regions that contain diagnostic information
|
|
* intended to be included in crash report minidumps.
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
JS_EnumerateDiagnosticMemoryRegions(JSEnumerateDiagnosticMemoryCallback callback);
|
|
|
|
extern JS_PUBLIC_API(void *)
|
|
JS_malloc(JSContext *cx, size_t nbytes);
|
|
|
|
extern JS_PUBLIC_API(void *)
|
|
JS_realloc(JSContext *cx, void *p, size_t nbytes);
|
|
|
|
/*
|
|
* A wrapper for js_free(p) that may delay js_free(p) invocation as a
|
|
* performance optimization.
|
|
* cx may be nullptr.
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
JS_free(JSContext *cx, void *p);
|
|
|
|
/*
|
|
* A wrapper for js_free(p) that may delay js_free(p) invocation as a
|
|
* performance optimization as specified by the given JSFreeOp instance.
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
JS_freeop(JSFreeOp *fop, void *p);
|
|
|
|
extern JS_PUBLIC_API(JSFreeOp *)
|
|
JS_GetDefaultFreeOp(JSRuntime *rt);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_updateMallocCounter(JSContext *cx, size_t nbytes);
|
|
|
|
extern JS_PUBLIC_API(char *)
|
|
JS_strdup(JSContext *cx, const char *s);
|
|
|
|
/* Duplicate a string. Does not report an error on failure. */
|
|
extern JS_PUBLIC_API(char *)
|
|
JS_strdup(JSRuntime *rt, const char *s);
|
|
|
|
namespace JS {
|
|
|
|
/*
|
|
* A GC root is a pointer to a jsval, JSObject * or JSString * that itself
|
|
* points into the GC heap. JS_AddValueRoot takes a pointer to a jsval and
|
|
* JS_AddGCThingRoot takes a pointer to a JSObject * or JString *.
|
|
*
|
|
* Note that, since JS_Add*Root stores the address of a variable (of type
|
|
* jsval, JSString *, or JSObject *), that variable must live until
|
|
* JS_Remove*Root is called to remove that variable. For example, after:
|
|
*
|
|
* void some_function() {
|
|
* jsval v;
|
|
* JS_AddNamedValueRoot(cx, &v, "name");
|
|
*
|
|
* the caller must perform
|
|
*
|
|
* JS_RemoveValueRoot(cx, &v);
|
|
*
|
|
* before some_function() returns.
|
|
*
|
|
* Also, use JS_AddNamed*Root(cx, &structPtr->memberObj, "structPtr->memberObj")
|
|
* in preference to JS_Add*Root(cx, &structPtr->memberObj), in order to identify
|
|
* roots by their source callsites. This way, you can find the callsite while
|
|
* debugging if you should fail to do JS_Remove*Root(cx, &structPtr->memberObj)
|
|
* before freeing structPtr's memory.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
AddValueRoot(JSContext *cx, JS::Heap<JS::Value> *vp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
AddStringRoot(JSContext *cx, JS::Heap<JSString *> *rp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
AddObjectRoot(JSContext *cx, JS::Heap<JSObject *> *rp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
AddNamedValueRoot(JSContext *cx, JS::Heap<JS::Value> *vp, const char *name);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
AddNamedValueRootRT(JSRuntime *rt, JS::Heap<JS::Value> *vp, const char *name);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
AddNamedStringRoot(JSContext *cx, JS::Heap<JSString *> *rp, const char *name);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
AddNamedObjectRoot(JSContext *cx, JS::Heap<JSObject *> *rp, const char *name);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
AddNamedScriptRoot(JSContext *cx, JS::Heap<JSScript *> *rp, const char *name);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
RemoveValueRoot(JSContext *cx, JS::Heap<JS::Value> *vp);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
RemoveStringRoot(JSContext *cx, JS::Heap<JSString *> *rp);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
RemoveObjectRoot(JSContext *cx, JS::Heap<JSObject *> *rp);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
RemoveScriptRoot(JSContext *cx, JS::Heap<JSScript *> *rp);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
RemoveValueRootRT(JSRuntime *rt, JS::Heap<JS::Value> *vp);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
RemoveStringRootRT(JSRuntime *rt, JS::Heap<JSString *> *rp);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
RemoveObjectRootRT(JSRuntime *rt, JS::Heap<JSObject *> *rp);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
RemoveScriptRootRT(JSRuntime *rt, JS::Heap<JSScript *> *rp);
|
|
|
|
} /* namespace JS */
|
|
|
|
/*
|
|
* Register externally maintained GC roots.
|
|
*
|
|
* traceOp: the trace operation. For each root the implementation should call
|
|
* JS_CallTracer whenever the root contains a traceable thing.
|
|
* data: the data argument to pass to each invocation of traceOp.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_AddExtraGCRootsTracer(JSRuntime *rt, JSTraceDataOp traceOp, void *data);
|
|
|
|
/* Undo a call to JS_AddExtraGCRootsTracer. */
|
|
extern JS_PUBLIC_API(void)
|
|
JS_RemoveExtraGCRootsTracer(JSRuntime *rt, JSTraceDataOp traceOp, void *data);
|
|
|
|
#ifdef JS_DEBUG
|
|
|
|
/*
|
|
* Debug-only method to dump the object graph of heap-allocated things.
|
|
*
|
|
* fp: file for the dump output.
|
|
* start: when non-null, dump only things reachable from start
|
|
* thing. Otherwise dump all things reachable from the
|
|
* runtime roots.
|
|
* startKind: trace kind of start if start is not null. Must be
|
|
* JSTRACE_OBJECT when start is null.
|
|
* thingToFind: dump only paths in the object graph leading to thingToFind
|
|
* when non-null.
|
|
* maxDepth: the upper bound on the number of edges to descend from the
|
|
* graph roots.
|
|
* thingToIgnore: thing to ignore during the graph traversal when non-null.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DumpHeap(JSRuntime *rt, FILE *fp, void* startThing, JSGCTraceKind kind,
|
|
void *thingToFind, size_t maxDepth, void *thingToIgnore);
|
|
|
|
#endif
|
|
|
|
/*
|
|
* Garbage collector API.
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
JS_GC(JSRuntime *rt);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_MaybeGC(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetGCCallback(JSRuntime *rt, JSGCCallback cb, void *data);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetFinalizeCallback(JSRuntime *rt, JSFinalizeCallback cb);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IsGCMarkingTracer(JSTracer *trc);
|
|
|
|
/* For assertions only. */
|
|
#ifdef JS_DEBUG
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IsMarkingGray(JSTracer *trc);
|
|
#endif
|
|
|
|
/*
|
|
* JS_IsAboutToBeFinalized checks if the given object is going to be finalized
|
|
* at the end of the current GC. When called outside of the context of a GC,
|
|
* this function will return false. Typically this function is used on weak
|
|
* references, where the reference should be nulled out or destroyed if the
|
|
* given object is about to be finalized.
|
|
*
|
|
* The argument to JS_IsAboutToBeFinalized is an in-out param: when the
|
|
* function returns false, the object being referenced is still alive, but the
|
|
* garbage collector might have moved it. In this case, the reference passed
|
|
* to JS_IsAboutToBeFinalized will be updated to the object's new location.
|
|
* Callers of this method are responsible for updating any state that is
|
|
* dependent on the object's address. For example, if the object's address is
|
|
* used as a key in a hashtable, then the object must be removed and
|
|
* re-inserted with the correct hash.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IsAboutToBeFinalized(JS::Heap<JSObject *> *objp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IsAboutToBeFinalizedUnbarriered(JSObject **objp);
|
|
|
|
typedef enum JSGCParamKey {
|
|
/* Maximum nominal heap before last ditch GC. */
|
|
JSGC_MAX_BYTES = 0,
|
|
|
|
/* Number of JS_malloc bytes before last ditch GC. */
|
|
JSGC_MAX_MALLOC_BYTES = 1,
|
|
|
|
/* Amount of bytes allocated by the GC. */
|
|
JSGC_BYTES = 3,
|
|
|
|
/* Number of times when GC was invoked. */
|
|
JSGC_NUMBER = 4,
|
|
|
|
/* Max size of the code cache in bytes. */
|
|
JSGC_MAX_CODE_CACHE_BYTES = 5,
|
|
|
|
/* Select GC mode. */
|
|
JSGC_MODE = 6,
|
|
|
|
/* Number of cached empty GC chunks. */
|
|
JSGC_UNUSED_CHUNKS = 7,
|
|
|
|
/* Total number of allocated GC chunks. */
|
|
JSGC_TOTAL_CHUNKS = 8,
|
|
|
|
/* Max milliseconds to spend in an incremental GC slice. */
|
|
JSGC_SLICE_TIME_BUDGET = 9,
|
|
|
|
/* Maximum size the GC mark stack can grow to. */
|
|
JSGC_MARK_STACK_LIMIT = 10,
|
|
|
|
/*
|
|
* GCs less than this far apart in time will be considered 'high-frequency GCs'.
|
|
* See setGCLastBytes in jsgc.cpp.
|
|
*/
|
|
JSGC_HIGH_FREQUENCY_TIME_LIMIT = 11,
|
|
|
|
/* Start of dynamic heap growth. */
|
|
JSGC_HIGH_FREQUENCY_LOW_LIMIT = 12,
|
|
|
|
/* End of dynamic heap growth. */
|
|
JSGC_HIGH_FREQUENCY_HIGH_LIMIT = 13,
|
|
|
|
/* Upper bound of heap growth. */
|
|
JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MAX = 14,
|
|
|
|
/* Lower bound of heap growth. */
|
|
JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MIN = 15,
|
|
|
|
/* Heap growth for low frequency GCs. */
|
|
JSGC_LOW_FREQUENCY_HEAP_GROWTH = 16,
|
|
|
|
/*
|
|
* If false, the heap growth factor is fixed at 3. If true, it is determined
|
|
* based on whether GCs are high- or low- frequency.
|
|
*/
|
|
JSGC_DYNAMIC_HEAP_GROWTH = 17,
|
|
|
|
/* If true, high-frequency GCs will use a longer mark slice. */
|
|
JSGC_DYNAMIC_MARK_SLICE = 18,
|
|
|
|
/* Lower limit after which we limit the heap growth. */
|
|
JSGC_ALLOCATION_THRESHOLD = 19,
|
|
|
|
/*
|
|
* We decommit memory lazily. If more than this number of megabytes is
|
|
* available to be decommitted, then JS_MaybeGC will trigger a shrinking GC
|
|
* to decommit it.
|
|
*/
|
|
JSGC_DECOMMIT_THRESHOLD = 20
|
|
} JSGCParamKey;
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetGCParameter(JSRuntime *rt, JSGCParamKey key, uint32_t value);
|
|
|
|
extern JS_PUBLIC_API(uint32_t)
|
|
JS_GetGCParameter(JSRuntime *rt, JSGCParamKey key);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetGCParameterForThread(JSContext *cx, JSGCParamKey key, uint32_t value);
|
|
|
|
extern JS_PUBLIC_API(uint32_t)
|
|
JS_GetGCParameterForThread(JSContext *cx, JSGCParamKey key);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetGCParametersBasedOnAvailableMemory(JSRuntime *rt, uint32_t availMem);
|
|
|
|
/*
|
|
* Create a new JSString whose chars member refers to external memory, i.e.,
|
|
* memory requiring application-specific finalization.
|
|
*/
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_NewExternalString(JSContext *cx, const jschar *chars, size_t length,
|
|
const JSStringFinalizer *fin);
|
|
|
|
/*
|
|
* Return whether 'str' was created with JS_NewExternalString or
|
|
* JS_NewExternalStringWithClosure.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IsExternalString(JSString *str);
|
|
|
|
/*
|
|
* Return the 'closure' arg passed to JS_NewExternalStringWithClosure or
|
|
* nullptr if the external string was created via JS_NewExternalString.
|
|
*/
|
|
extern JS_PUBLIC_API(const JSStringFinalizer *)
|
|
JS_GetExternalStringFinalizer(JSString *str);
|
|
|
|
/*
|
|
* Set the size of the native stack that should not be exceed. To disable
|
|
* stack size checking pass 0.
|
|
*
|
|
* SpiderMonkey allows for a distinction between system code (such as GCs, which
|
|
* may incidentally be triggered by script but are not strictly performed on
|
|
* behalf of such script), trusted script (as determined by JS_SetTrustedPrincipals),
|
|
* and untrusted script. Each kind of code may have a different stack quota,
|
|
* allowing embedders to keep higher-priority machinery running in the face of
|
|
* scripted stack exhaustion by something else.
|
|
*
|
|
* The stack quotas for each kind of code should be monotonically descending,
|
|
* and may be specified with this function. If 0 is passed for a given kind
|
|
* of code, it defaults to the value of the next-highest-priority kind.
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetNativeStackQuota(JSRuntime *cx, size_t systemCodeStackSize,
|
|
size_t trustedScriptStackSize = 0,
|
|
size_t untrustedScriptStackSize = 0);
|
|
|
|
/************************************************************************/
|
|
|
|
extern JS_PUBLIC_API(int)
|
|
JS_IdArrayLength(JSContext *cx, JSIdArray *ida);
|
|
|
|
extern JS_PUBLIC_API(jsid)
|
|
JS_IdArrayGet(JSContext *cx, JSIdArray *ida, int index);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_DestroyIdArray(JSContext *cx, JSIdArray *ida);
|
|
|
|
namespace JS {
|
|
|
|
class AutoIdArray : private AutoGCRooter
|
|
{
|
|
public:
|
|
AutoIdArray(JSContext *cx, JSIdArray *ida
|
|
MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
|
|
: AutoGCRooter(cx, IDARRAY), context(cx), idArray(ida)
|
|
{
|
|
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
|
|
}
|
|
~AutoIdArray() {
|
|
if (idArray)
|
|
JS_DestroyIdArray(context, idArray);
|
|
}
|
|
bool operator!() {
|
|
return !idArray;
|
|
}
|
|
jsid operator[](size_t i) const {
|
|
JS_ASSERT(idArray);
|
|
return JS_IdArrayGet(context, idArray, i);
|
|
}
|
|
size_t length() const {
|
|
return JS_IdArrayLength(context, idArray);
|
|
}
|
|
|
|
friend void AutoGCRooter::trace(JSTracer *trc);
|
|
|
|
JSIdArray *steal() {
|
|
JSIdArray *copy = idArray;
|
|
idArray = nullptr;
|
|
return copy;
|
|
}
|
|
|
|
protected:
|
|
inline void trace(JSTracer *trc);
|
|
|
|
private:
|
|
JSContext *context;
|
|
JSIdArray *idArray;
|
|
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
|
|
|
|
/* No copy or assignment semantics. */
|
|
AutoIdArray(AutoIdArray &ida) MOZ_DELETE;
|
|
void operator=(AutoIdArray &ida) MOZ_DELETE;
|
|
};
|
|
|
|
} /* namespace JS */
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ValueToId(JSContext *cx, JS::HandleValue v, JS::MutableHandleId idp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_StringToId(JSContext *cx, JS::HandleString s, JS::MutableHandleId idp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IdToValue(JSContext *cx, jsid id, JS::MutableHandle<JS::Value> vp);
|
|
|
|
/*
|
|
* Invoke the [[DefaultValue]] hook (see ES5 8.6.2) with the provided hint on
|
|
* the specified object, computing a primitive default value for the object.
|
|
* The hint must be JSTYPE_STRING, JSTYPE_NUMBER, or JSTYPE_VOID (no hint). On
|
|
* success the resulting value is stored in *vp.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DefaultValue(JSContext *cx, JS::Handle<JSObject*> obj, JSType hint,
|
|
JS::MutableHandle<JS::Value> vp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_PropertyStub(JSContext *cx, JS::HandleObject obj, JS::HandleId id,
|
|
JS::MutableHandleValue vp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_StrictPropertyStub(JSContext *cx, JS::HandleObject obj, JS::HandleId id, bool strict,
|
|
JS::MutableHandleValue vp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DeletePropertyStub(JSContext *cx, JS::HandleObject obj, JS::HandleId id,
|
|
bool *succeeded);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_EnumerateStub(JSContext *cx, JS::HandleObject obj);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ResolveStub(JSContext *cx, JS::HandleObject obj, JS::HandleId id);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ConvertStub(JSContext *cx, JS::HandleObject obj, JSType type,
|
|
JS::MutableHandleValue vp);
|
|
|
|
struct JSConstDoubleSpec {
|
|
double dval;
|
|
const char *name;
|
|
uint8_t flags;
|
|
uint8_t spare[3];
|
|
};
|
|
|
|
struct JSJitInfo;
|
|
|
|
/*
|
|
* Wrappers to replace {Strict,}PropertyOp for JSPropertySpecs. This will allow
|
|
* us to pass one JSJitInfo per function with the property spec, without
|
|
* additional field overhead.
|
|
*/
|
|
typedef struct JSStrictPropertyOpWrapper {
|
|
JSStrictPropertyOp op;
|
|
const JSJitInfo *info;
|
|
} JSStrictPropertyOpWrapper;
|
|
|
|
typedef struct JSPropertyOpWrapper {
|
|
JSPropertyOp op;
|
|
const JSJitInfo *info;
|
|
} JSPropertyOpWrapper;
|
|
|
|
/*
|
|
* Wrapper to do as above, but for JSNatives for JSFunctionSpecs.
|
|
*/
|
|
typedef struct JSNativeWrapper {
|
|
JSNative op;
|
|
const JSJitInfo *info;
|
|
} JSNativeWrapper;
|
|
|
|
/*
|
|
* Macro static initializers which make it easy to pass no JSJitInfo as part of a
|
|
* JSPropertySpec or JSFunctionSpec.
|
|
*/
|
|
#define JSOP_WRAPPER(op) { {op, nullptr} }
|
|
#define JSOP_NULLWRAPPER JSOP_WRAPPER(nullptr)
|
|
|
|
/*
|
|
* To define an array element rather than a named property member, cast the
|
|
* element's index to (const char *) and initialize name with it, and set the
|
|
* JSPROP_INDEX bit in flags.
|
|
*/
|
|
struct JSPropertySpec {
|
|
struct SelfHostedWrapper {
|
|
void *unused;
|
|
const char *funname;
|
|
};
|
|
|
|
const char *name;
|
|
uint8_t flags;
|
|
union {
|
|
JSPropertyOpWrapper propertyOp;
|
|
SelfHostedWrapper selfHosted;
|
|
} getter;
|
|
union {
|
|
JSStrictPropertyOpWrapper propertyOp;
|
|
SelfHostedWrapper selfHosted;
|
|
} setter;
|
|
|
|
private:
|
|
void StaticAsserts() {
|
|
JS_STATIC_ASSERT(sizeof(SelfHostedWrapper) == sizeof(JSPropertyOpWrapper));
|
|
JS_STATIC_ASSERT(sizeof(SelfHostedWrapper) == sizeof(JSStrictPropertyOpWrapper));
|
|
JS_STATIC_ASSERT(offsetof(SelfHostedWrapper, funname) ==
|
|
offsetof(JSPropertyOpWrapper, info));
|
|
}
|
|
};
|
|
|
|
namespace JS {
|
|
namespace detail {
|
|
|
|
/* NEVER DEFINED, DON'T USE. For use by JS_CAST_NATIVE_TO only. */
|
|
inline int CheckIsNative(JSNative native);
|
|
|
|
/* NEVER DEFINED, DON'T USE. For use by JS_CAST_STRING_TO only. */
|
|
template<size_t N>
|
|
inline int
|
|
CheckIsCharacterLiteral(const char (&arr)[N]);
|
|
|
|
} // namespace detail
|
|
} // namespace JS
|
|
|
|
#define JS_CAST_NATIVE_TO(v, To) \
|
|
(static_cast<void>(sizeof(JS::detail::CheckIsNative(v))), \
|
|
reinterpret_cast<To>(v))
|
|
|
|
#define JS_CAST_STRING_TO(s, To) \
|
|
(static_cast<void>(sizeof(JS::detail::CheckIsCharacterLiteral(s))), \
|
|
reinterpret_cast<To>(s))
|
|
|
|
#define JS_CHECK_ACCESSOR_FLAGS(flags) \
|
|
(static_cast<mozilla::EnableIf<!((flags) & (JSPROP_READONLY | JSPROP_SHARED | JSPROP_NATIVE_ACCESSORS))>::Type>(0), \
|
|
(flags))
|
|
|
|
/*
|
|
* JSPropertySpec uses JSAPI JSPropertyOp and JSStrictPropertyOp in function
|
|
* signatures. These macros encapsulate the definition of JSNative-backed
|
|
* JSPropertySpecs, performing type-safe casts on the getter/setter functions
|
|
* and adding the necessary property flags to trigger interpretation as
|
|
* JSNatives.
|
|
*/
|
|
#define JS_PSG(name, getter, flags) \
|
|
{name, \
|
|
uint8_t(JS_CHECK_ACCESSOR_FLAGS(flags) | JSPROP_SHARED | JSPROP_NATIVE_ACCESSORS), \
|
|
JSOP_WRAPPER(JS_CAST_NATIVE_TO(getter, JSPropertyOp)), \
|
|
JSOP_NULLWRAPPER}
|
|
#define JS_PSGS(name, getter, setter, flags) \
|
|
{name, \
|
|
uint8_t(JS_CHECK_ACCESSOR_FLAGS(flags) | JSPROP_SHARED | JSPROP_NATIVE_ACCESSORS), \
|
|
JSOP_WRAPPER(JS_CAST_NATIVE_TO(getter, JSPropertyOp)), \
|
|
JSOP_WRAPPER(JS_CAST_NATIVE_TO(setter, JSStrictPropertyOp))}
|
|
#define JS_SELF_HOSTED_GET(name, getterName, flags) \
|
|
{name, \
|
|
uint8_t(JS_CHECK_ACCESSOR_FLAGS(flags) | JSPROP_SHARED | JSPROP_GETTER), \
|
|
{ nullptr, JS_CAST_STRING_TO(getterName, const JSJitInfo *) }, \
|
|
JSOP_NULLWRAPPER }
|
|
#define JS_SELF_HOSTED_GETSET(name, getterName, setterName, flags) \
|
|
{name, \
|
|
uint8_t(JS_CHECK_ACCESSOR_FLAGS(flags) | JSPROP_SHARED | JSPROP_GETTER | JSPROP_SETTER), \
|
|
{ nullptr, JS_CAST_STRING_TO(getterName, const JSJitInfo *) }, \
|
|
{ nullptr, JS_CAST_STRING_TO(setterName, const JSJitInfo *) } }
|
|
#define JS_PS_END { nullptr, 0, JSOP_NULLWRAPPER, JSOP_NULLWRAPPER }
|
|
|
|
/*
|
|
* To define a native function, set call to a JSNativeWrapper. To define a
|
|
* self-hosted function, set selfHostedName to the name of a function
|
|
* compiled during JSRuntime::initSelfHosting.
|
|
*/
|
|
struct JSFunctionSpec {
|
|
const char *name;
|
|
JSNativeWrapper call;
|
|
uint16_t nargs;
|
|
uint16_t flags;
|
|
const char *selfHostedName;
|
|
};
|
|
|
|
/*
|
|
* Terminating sentinel initializer to put at the end of a JSFunctionSpec array
|
|
* that's passed to JS_DefineFunctions or JS_InitClass.
|
|
*/
|
|
#define JS_FS_END JS_FS(nullptr,nullptr,0,0)
|
|
|
|
/*
|
|
* Initializer macros for a JSFunctionSpec array element. JS_FN (whose name pays
|
|
* homage to the old JSNative/JSFastNative split) simply adds the flag
|
|
* JSFUN_STUB_GSOPS. JS_FNINFO allows the simple adding of
|
|
* JSJitInfos. JS_SELF_HOSTED_FN declares a self-hosted function. Finally
|
|
* JS_FNSPEC has slots for all the fields.
|
|
*/
|
|
#define JS_FS(name,call,nargs,flags) \
|
|
JS_FNSPEC(name, call, nullptr, nargs, flags, nullptr)
|
|
#define JS_FN(name,call,nargs,flags) \
|
|
JS_FNSPEC(name, call, nullptr, nargs, (flags) | JSFUN_STUB_GSOPS, nullptr)
|
|
#define JS_FNINFO(name,call,info,nargs,flags) \
|
|
JS_FNSPEC(name, call, info, nargs, flags, nullptr)
|
|
#define JS_SELF_HOSTED_FN(name,selfHostedName,nargs,flags) \
|
|
JS_FNSPEC(name, nullptr, nullptr, nargs, flags, selfHostedName)
|
|
#define JS_FNSPEC(name,call,info,nargs,flags,selfHostedName) \
|
|
{name, {call, info}, nargs, flags, selfHostedName}
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_InitClass(JSContext *cx, JS::HandleObject obj, JS::HandleObject parent_proto,
|
|
const JSClass *clasp, JSNative constructor, unsigned nargs,
|
|
const JSPropertySpec *ps, const JSFunctionSpec *fs,
|
|
const JSPropertySpec *static_ps, const JSFunctionSpec *static_fs);
|
|
|
|
/*
|
|
* Set up ctor.prototype = proto and proto.constructor = ctor with the
|
|
* right property flags.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_LinkConstructorAndPrototype(JSContext *cx, JS::Handle<JSObject*> ctor,
|
|
JS::Handle<JSObject*> proto);
|
|
|
|
extern JS_PUBLIC_API(const JSClass *)
|
|
JS_GetClass(JSObject *obj);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_InstanceOf(JSContext *cx, JS::Handle<JSObject*> obj, const JSClass *clasp, JS::CallArgs *args);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_HasInstance(JSContext *cx, JS::Handle<JSObject*> obj, JS::Handle<JS::Value> v, bool *bp);
|
|
|
|
extern JS_PUBLIC_API(void *)
|
|
JS_GetPrivate(JSObject *obj);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetPrivate(JSObject *obj, void *data);
|
|
|
|
extern JS_PUBLIC_API(void *)
|
|
JS_GetInstancePrivate(JSContext *cx, JS::Handle<JSObject*> obj, const JSClass *clasp,
|
|
JS::CallArgs *args);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_GetPrototype(JSContext *cx, JS::HandleObject obj, JS::MutableHandleObject protop);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_SetPrototype(JSContext *cx, JS::HandleObject obj, JS::HandleObject proto);
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_GetParent(JSObject *obj);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_SetParent(JSContext *cx, JS::HandleObject obj, JS::HandleObject parent);
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_GetConstructor(JSContext *cx, JS::Handle<JSObject*> proto);
|
|
|
|
namespace JS {
|
|
|
|
enum ZoneSpecifier {
|
|
FreshZone = 0,
|
|
SystemZone = 1
|
|
};
|
|
|
|
class JS_PUBLIC_API(CompartmentOptions)
|
|
{
|
|
public:
|
|
class Override {
|
|
public:
|
|
Override() : mode_(Default) {}
|
|
|
|
bool get(bool defaultValue) const {
|
|
if (mode_ == Default)
|
|
return defaultValue;
|
|
return mode_ == ForceTrue;
|
|
};
|
|
|
|
void set(bool overrideValue) {
|
|
mode_ = overrideValue ? ForceTrue : ForceFalse;
|
|
};
|
|
|
|
void reset() {
|
|
mode_ = Default;
|
|
}
|
|
|
|
private:
|
|
enum Mode {
|
|
Default,
|
|
ForceTrue,
|
|
ForceFalse
|
|
};
|
|
|
|
Mode mode_;
|
|
};
|
|
|
|
explicit CompartmentOptions()
|
|
: version_(JSVERSION_UNKNOWN)
|
|
, invisibleToDebugger_(false)
|
|
, mergeable_(false)
|
|
, discardSource_(false)
|
|
, traceGlobal_(nullptr)
|
|
, singletonsAsTemplates_(true)
|
|
{
|
|
zone_.spec = JS::FreshZone;
|
|
}
|
|
|
|
JSVersion version() const { return version_; }
|
|
CompartmentOptions &setVersion(JSVersion aVersion) {
|
|
MOZ_ASSERT(aVersion != JSVERSION_UNKNOWN);
|
|
version_ = aVersion;
|
|
return *this;
|
|
}
|
|
|
|
// Certain scopes (i.e. XBL compilation scopes) are implementation details
|
|
// of the embedding, and references to them should never leak out to script.
|
|
// This flag causes the this compartment to skip firing onNewGlobalObject
|
|
// and makes addDebuggee a no-op for this global.
|
|
bool invisibleToDebugger() const { return invisibleToDebugger_; }
|
|
CompartmentOptions &setInvisibleToDebugger(bool flag) {
|
|
invisibleToDebugger_ = flag;
|
|
return *this;
|
|
}
|
|
|
|
// Compartments used for off-thread compilation have their contents merged
|
|
// into a target compartment when the compilation is finished. This is only
|
|
// allowed if this flag is set. The invisibleToDebugger flag must also be
|
|
// set for such compartments.
|
|
bool mergeable() const { return mergeable_; }
|
|
CompartmentOptions &setMergeable(bool flag) {
|
|
mergeable_ = flag;
|
|
return *this;
|
|
}
|
|
|
|
// For certain globals, we know enough about the code that will run in them
|
|
// that we can discard script source entirely.
|
|
bool discardSource() const { return discardSource_; }
|
|
CompartmentOptions &setDiscardSource(bool flag) {
|
|
discardSource_ = flag;
|
|
return *this;
|
|
}
|
|
|
|
|
|
bool cloneSingletons(JSContext *cx) const;
|
|
Override &cloneSingletonsOverride() { return cloneSingletonsOverride_; }
|
|
|
|
void *zonePointer() const {
|
|
JS_ASSERT(uintptr_t(zone_.pointer) > uintptr_t(JS::SystemZone));
|
|
return zone_.pointer;
|
|
}
|
|
ZoneSpecifier zoneSpecifier() const { return zone_.spec; }
|
|
CompartmentOptions &setZone(ZoneSpecifier spec);
|
|
CompartmentOptions &setSameZoneAs(JSObject *obj);
|
|
|
|
void setSingletonsAsValues() {
|
|
singletonsAsTemplates_ = false;
|
|
}
|
|
bool getSingletonsAsTemplates() const {
|
|
return singletonsAsTemplates_;
|
|
};
|
|
|
|
CompartmentOptions &setTrace(JSTraceOp op) {
|
|
traceGlobal_ = op;
|
|
return *this;
|
|
}
|
|
JSTraceOp getTrace() const {
|
|
return traceGlobal_;
|
|
}
|
|
|
|
private:
|
|
JSVersion version_;
|
|
bool invisibleToDebugger_;
|
|
bool mergeable_;
|
|
bool discardSource_;
|
|
Override cloneSingletonsOverride_;
|
|
union {
|
|
ZoneSpecifier spec;
|
|
void *pointer; // js::Zone* is not exposed in the API.
|
|
} zone_;
|
|
JSTraceOp traceGlobal_;
|
|
|
|
// To XDR singletons, we need to ensure that all singletons are all used as
|
|
// templates, by making JSOP_OBJECT return a clone of the JSScript
|
|
// singleton, instead of returning the value which is baked in the JSScript.
|
|
bool singletonsAsTemplates_;
|
|
};
|
|
|
|
JS_PUBLIC_API(CompartmentOptions &)
|
|
CompartmentOptionsRef(JSCompartment *compartment);
|
|
|
|
JS_PUBLIC_API(CompartmentOptions &)
|
|
CompartmentOptionsRef(JSObject *obj);
|
|
|
|
JS_PUBLIC_API(CompartmentOptions &)
|
|
CompartmentOptionsRef(JSContext *cx);
|
|
|
|
// During global creation, we fire notifications to callbacks registered
|
|
// via the Debugger API. These callbacks are arbitrary script, and can touch
|
|
// the global in arbitrary ways. When that happens, the global should not be
|
|
// in a half-baked state. But this creates a problem for consumers that need
|
|
// to set slots on the global to put it in a consistent state.
|
|
//
|
|
// This API provides a way for consumers to set slots atomically (immediately
|
|
// after the global is created), before any debugger hooks are fired. It's
|
|
// unfortunately on the clunky side, but that's the way the cookie crumbles.
|
|
//
|
|
// If callers have no additional state on the global to set up, they may pass
|
|
// |FireOnNewGlobalHook| to JS_NewGlobalObject, which causes that function to
|
|
// fire the hook as its final act before returning. Otherwise, callers should
|
|
// pass |DontFireOnNewGlobalHook|, which means that they are responsible for
|
|
// invoking JS_FireOnNewGlobalObject upon successfully creating the global. If
|
|
// an error occurs and the operation aborts, callers should skip firing the
|
|
// hook. But otherwise, callers must take care to fire the hook exactly once
|
|
// before compiling any script in the global's scope (we have assertions in
|
|
// place to enforce this). This lets us be sure that debugger clients never miss
|
|
// breakpoints.
|
|
enum OnNewGlobalHookOption {
|
|
FireOnNewGlobalHook,
|
|
DontFireOnNewGlobalHook
|
|
};
|
|
|
|
} /* namespace JS */
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_NewGlobalObject(JSContext *cx, const JSClass *clasp, JSPrincipals *principals,
|
|
JS::OnNewGlobalHookOption hookOption,
|
|
const JS::CompartmentOptions &options = JS::CompartmentOptions());
|
|
/*
|
|
* Spidermonkey does not have a good way of keeping track of what compartments should be marked on
|
|
* their own. We can mark the roots unconditionally, but marking GC things only relevant in live
|
|
* compartments is hard. To mitigate this, we create a static trace hook, installed on each global
|
|
* object, from which we can be sure the compartment is relevant, and mark it.
|
|
*
|
|
* It is still possible to specify custom trace hooks for global object classes. They can be
|
|
* provided via the CompartmentOptions passed to JS_NewGlobalObject.
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
JS_GlobalObjectTraceHook(JSTracer *trc, JSObject *global);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_FireOnNewGlobalObject(JSContext *cx, JS::HandleObject global);
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_NewObject(JSContext *cx, const JSClass *clasp, JS::Handle<JSObject*> proto,
|
|
JS::Handle<JSObject*> parent);
|
|
|
|
/* Queries the [[Extensible]] property of the object. */
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IsExtensible(JSContext *cx, JS::HandleObject obj, bool *extensible);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IsNative(JSObject *obj);
|
|
|
|
extern JS_PUBLIC_API(JSRuntime *)
|
|
JS_GetObjectRuntime(JSObject *obj);
|
|
|
|
/*
|
|
* Unlike JS_NewObject, JS_NewObjectWithGivenProto does not compute a default
|
|
* proto if proto's actual parameter value is null.
|
|
*/
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_NewObjectWithGivenProto(JSContext *cx, const JSClass *clasp, JS::Handle<JSObject*> proto,
|
|
JS::Handle<JSObject*> parent);
|
|
|
|
/*
|
|
* Freeze obj, and all objects it refers to, recursively. This will not recurse
|
|
* through non-extensible objects, on the assumption that those are already
|
|
* deep-frozen.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DeepFreezeObject(JSContext *cx, JS::Handle<JSObject*> obj);
|
|
|
|
/*
|
|
* Freezes an object; see ES5's Object.freeze(obj) method.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_FreezeObject(JSContext *cx, JS::Handle<JSObject*> obj);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_PreventExtensions(JSContext *cx, JS::HandleObject obj);
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_New(JSContext *cx, JS::HandleObject ctor, const JS::HandleValueArray& args);
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_DefineObject(JSContext *cx, JSObject *obj, const char *name, const JSClass *clasp,
|
|
JSObject *proto, unsigned attrs);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DefineConstDoubles(JSContext *cx, JS::HandleObject obj, const JSConstDoubleSpec *cds);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DefineProperties(JSContext *cx, JS::HandleObject obj, const JSPropertySpec *ps);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DefineProperty(JSContext *cx, JS::HandleObject obj, const char *name, JS::HandleValue value,
|
|
unsigned attrs,
|
|
JSPropertyOp getter = nullptr, JSStrictPropertyOp setter = nullptr);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DefineProperty(JSContext *cx, JS::HandleObject obj, const char *name, JS::HandleObject value,
|
|
unsigned attrs,
|
|
JSPropertyOp getter = nullptr, JSStrictPropertyOp setter = nullptr);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DefineProperty(JSContext *cx, JS::HandleObject obj, const char *name, JS::HandleString value,
|
|
unsigned attrs,
|
|
JSPropertyOp getter = nullptr, JSStrictPropertyOp setter = nullptr);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DefineProperty(JSContext *cx, JS::HandleObject obj, const char *name, int32_t value,
|
|
unsigned attrs,
|
|
JSPropertyOp getter = nullptr, JSStrictPropertyOp setter = nullptr);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DefineProperty(JSContext *cx, JS::HandleObject obj, const char *name, uint32_t value,
|
|
unsigned attrs,
|
|
JSPropertyOp getter = nullptr, JSStrictPropertyOp setter = nullptr);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DefineProperty(JSContext *cx, JS::HandleObject obj, const char *name, double value,
|
|
unsigned attrs,
|
|
JSPropertyOp getter = nullptr, JSStrictPropertyOp setter = nullptr);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DefinePropertyById(JSContext *cx, JSObject *obj, jsid id, jsval value,
|
|
JSPropertyOp getter, JSStrictPropertyOp setter, unsigned attrs);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DefineOwnProperty(JSContext *cx, JS::HandleObject obj, JS::HandleId id,
|
|
JS::HandleValue descriptor, bool *bp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_AlreadyHasOwnProperty(JSContext *cx, JS::HandleObject obj, const char *name,
|
|
bool *foundp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_AlreadyHasOwnPropertyById(JSContext *cx, JS::HandleObject obj, JS::HandleId id,
|
|
bool *foundp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_HasProperty(JSContext *cx, JS::HandleObject obj, const char *name, bool *foundp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_HasPropertyById(JSContext *cx, JS::HandleObject obj, JS::HandleId id, bool *foundp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_LookupProperty(JSContext *cx, JS::HandleObject obj, const char *name, JS::MutableHandleValue vp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_LookupPropertyById(JSContext *cx, JS::HandleObject obj, JS::HandleId id,
|
|
JS::MutableHandleValue vp);
|
|
|
|
struct JSPropertyDescriptor {
|
|
JSObject *obj;
|
|
unsigned attrs;
|
|
JSPropertyOp getter;
|
|
JSStrictPropertyOp setter;
|
|
JS::Value value;
|
|
|
|
JSPropertyDescriptor()
|
|
: obj(nullptr), attrs(0), getter(nullptr), setter(nullptr), value(JSVAL_VOID)
|
|
{}
|
|
|
|
void trace(JSTracer *trc);
|
|
};
|
|
|
|
namespace JS {
|
|
|
|
template <typename Outer>
|
|
class PropertyDescriptorOperations
|
|
{
|
|
const JSPropertyDescriptor * desc() const { return static_cast<const Outer*>(this)->extract(); }
|
|
|
|
public:
|
|
bool isEnumerable() const { return desc()->attrs & JSPROP_ENUMERATE; }
|
|
bool isReadonly() const { return desc()->attrs & JSPROP_READONLY; }
|
|
bool isPermanent() const { return desc()->attrs & JSPROP_PERMANENT; }
|
|
bool hasNativeAccessors() const { return desc()->attrs & JSPROP_NATIVE_ACCESSORS; }
|
|
bool hasGetterObject() const { return desc()->attrs & JSPROP_GETTER; }
|
|
bool hasSetterObject() const { return desc()->attrs & JSPROP_SETTER; }
|
|
bool hasGetterOrSetterObject() const { return desc()->attrs & (JSPROP_GETTER | JSPROP_SETTER); }
|
|
bool isShared() const { return desc()->attrs & JSPROP_SHARED; }
|
|
bool isIndex() const { return desc()->attrs & JSPROP_INDEX; }
|
|
bool hasAttributes(unsigned attrs) const { return desc()->attrs & attrs; }
|
|
|
|
JS::HandleObject object() const {
|
|
return JS::HandleObject::fromMarkedLocation(&desc()->obj);
|
|
}
|
|
unsigned attributes() const { return desc()->attrs; }
|
|
JSPropertyOp getter() const { return desc()->getter; }
|
|
JSStrictPropertyOp setter() const { return desc()->setter; }
|
|
JS::HandleObject getterObject() const {
|
|
MOZ_ASSERT(hasGetterObject());
|
|
return JS::HandleObject::fromMarkedLocation(
|
|
reinterpret_cast<JSObject *const *>(&desc()->getter));
|
|
}
|
|
JS::HandleObject setterObject() const {
|
|
MOZ_ASSERT(hasSetterObject());
|
|
return JS::HandleObject::fromMarkedLocation(
|
|
reinterpret_cast<JSObject *const *>(&desc()->setter));
|
|
}
|
|
JS::HandleValue value() const {
|
|
return JS::HandleValue::fromMarkedLocation(&desc()->value);
|
|
}
|
|
};
|
|
|
|
template <typename Outer>
|
|
class MutablePropertyDescriptorOperations : public PropertyDescriptorOperations<Outer>
|
|
{
|
|
JSPropertyDescriptor * desc() { return static_cast<Outer*>(this)->extractMutable(); }
|
|
|
|
public:
|
|
|
|
void clear() {
|
|
object().set(nullptr);
|
|
setAttributes(0);
|
|
setGetter(nullptr);
|
|
setSetter(nullptr);
|
|
value().setUndefined();
|
|
}
|
|
|
|
JS::MutableHandleObject object() {
|
|
return JS::MutableHandleObject::fromMarkedLocation(&desc()->obj);
|
|
}
|
|
unsigned &attributesRef() { return desc()->attrs; }
|
|
JSPropertyOp &getter() { return desc()->getter; }
|
|
JSStrictPropertyOp &setter() { return desc()->setter; }
|
|
JS::MutableHandleValue value() {
|
|
return JS::MutableHandleValue::fromMarkedLocation(&desc()->value);
|
|
}
|
|
|
|
void setEnumerable() { desc()->attrs |= JSPROP_ENUMERATE; }
|
|
void setAttributes(unsigned attrs) { desc()->attrs = attrs; }
|
|
|
|
void setGetter(JSPropertyOp op) { desc()->getter = op; }
|
|
void setSetter(JSStrictPropertyOp op) { desc()->setter = op; }
|
|
void setGetterObject(JSObject *obj) { desc()->getter = reinterpret_cast<JSPropertyOp>(obj); }
|
|
void setSetterObject(JSObject *obj) { desc()->setter = reinterpret_cast<JSStrictPropertyOp>(obj); }
|
|
};
|
|
|
|
} /* namespace JS */
|
|
|
|
namespace js {
|
|
|
|
template <>
|
|
struct GCMethods<JSPropertyDescriptor> {
|
|
static JSPropertyDescriptor initial() { return JSPropertyDescriptor(); }
|
|
static ThingRootKind kind() { return THING_ROOT_PROPERTY_DESCRIPTOR; }
|
|
static bool poisoned(const JSPropertyDescriptor &desc) {
|
|
return (desc.obj && JS::IsPoisonedPtr(desc.obj)) ||
|
|
(desc.attrs & JSPROP_GETTER && desc.getter && JS::IsPoisonedPtr(desc.getter)) ||
|
|
(desc.attrs & JSPROP_SETTER && desc.setter && JS::IsPoisonedPtr(desc.setter)) ||
|
|
(desc.value.isGCThing() && JS::IsPoisonedPtr(desc.value.toGCThing()));
|
|
}
|
|
};
|
|
|
|
template <>
|
|
class RootedBase<JSPropertyDescriptor>
|
|
: public JS::MutablePropertyDescriptorOperations<JS::Rooted<JSPropertyDescriptor> >
|
|
{
|
|
friend class JS::PropertyDescriptorOperations<JS::Rooted<JSPropertyDescriptor> >;
|
|
friend class JS::MutablePropertyDescriptorOperations<JS::Rooted<JSPropertyDescriptor> >;
|
|
const JSPropertyDescriptor *extract() const {
|
|
return static_cast<const JS::Rooted<JSPropertyDescriptor>*>(this)->address();
|
|
}
|
|
JSPropertyDescriptor *extractMutable() {
|
|
return static_cast<JS::Rooted<JSPropertyDescriptor>*>(this)->address();
|
|
}
|
|
};
|
|
|
|
template <>
|
|
class HandleBase<JSPropertyDescriptor>
|
|
: public JS::PropertyDescriptorOperations<JS::Handle<JSPropertyDescriptor> >
|
|
{
|
|
friend class JS::PropertyDescriptorOperations<JS::Handle<JSPropertyDescriptor> >;
|
|
const JSPropertyDescriptor *extract() const {
|
|
return static_cast<const JS::Handle<JSPropertyDescriptor>*>(this)->address();
|
|
}
|
|
};
|
|
|
|
template <>
|
|
class MutableHandleBase<JSPropertyDescriptor>
|
|
: public JS::MutablePropertyDescriptorOperations<JS::MutableHandle<JSPropertyDescriptor> >
|
|
{
|
|
friend class JS::PropertyDescriptorOperations<JS::MutableHandle<JSPropertyDescriptor> >;
|
|
friend class JS::MutablePropertyDescriptorOperations<JS::MutableHandle<JSPropertyDescriptor> >;
|
|
const JSPropertyDescriptor *extract() const {
|
|
return static_cast<const JS::MutableHandle<JSPropertyDescriptor>*>(this)->address();
|
|
}
|
|
JSPropertyDescriptor *extractMutable() {
|
|
return static_cast<JS::MutableHandle<JSPropertyDescriptor>*>(this)->address();
|
|
}
|
|
};
|
|
|
|
} /* namespace js */
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_GetOwnPropertyDescriptorById(JSContext *cx, JS::HandleObject obj, JS::HandleId id,
|
|
JS::MutableHandle<JSPropertyDescriptor> desc);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_GetOwnPropertyDescriptor(JSContext *cx, JS::HandleObject obj, const char *name,
|
|
JS::MutableHandle<JSPropertyDescriptor> desc);
|
|
|
|
/*
|
|
* Like JS_GetOwnPropertyDescriptorById but will return a property on
|
|
* an object on the prototype chain (returned in desc->obj). If desc->obj is null,
|
|
* then this property was not found on the prototype chain.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_GetPropertyDescriptorById(JSContext *cx, JS::HandleObject obj, JS::HandleId id,
|
|
JS::MutableHandle<JSPropertyDescriptor> desc);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_GetPropertyDescriptor(JSContext *cx, JS::HandleObject obj, const char *name,
|
|
JS::MutableHandle<JSPropertyDescriptor> desc);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_GetProperty(JSContext *cx, JS::HandleObject obj, const char *name, JS::MutableHandleValue vp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_GetPropertyById(JSContext *cx, JS::HandleObject obj, JS::HandleId id, JS::MutableHandleValue vp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ForwardGetPropertyTo(JSContext *cx, JS::HandleObject obj, JS::HandleId id, JS::HandleObject onBehalfOf,
|
|
JS::MutableHandleValue vp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_SetProperty(JSContext *cx, JS::HandleObject obj, const char *name, JS::HandleValue v);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_SetPropertyById(JSContext *cx, JS::HandleObject obj, JS::HandleId id, JS::HandleValue v);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DeleteProperty(JSContext *cx, JS::HandleObject obj, const char *name);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DeleteProperty2(JSContext *cx, JS::HandleObject obj, const char *name, bool *succeeded);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DeletePropertyById(JSContext *cx, JS::HandleObject obj, jsid id);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DeletePropertyById2(JSContext *cx, JS::HandleObject obj, JS::HandleId id, bool *succeeded);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DefineUCProperty(JSContext *cx, JSObject *obj,
|
|
const jschar *name, size_t namelen, jsval value,
|
|
JSPropertyOp getter, JSStrictPropertyOp setter,
|
|
unsigned attrs);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_AlreadyHasOwnUCProperty(JSContext *cx, JS::HandleObject obj, const jschar *name,
|
|
size_t namelen, bool *foundp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_HasUCProperty(JSContext *cx, JS::HandleObject obj,
|
|
const jschar *name, size_t namelen,
|
|
bool *vp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_LookupUCProperty(JSContext *cx, JS::HandleObject obj,
|
|
const jschar *name, size_t namelen,
|
|
JS::MutableHandleValue vp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_GetUCProperty(JSContext *cx, JS::HandleObject obj,
|
|
const jschar *name, size_t namelen,
|
|
JS::MutableHandleValue vp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_SetUCProperty(JSContext *cx, JS::HandleObject obj,
|
|
const jschar *name, size_t namelen,
|
|
JS::HandleValue v);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DeleteUCProperty2(JSContext *cx, JS::HandleObject obj, const jschar *name, size_t namelen,
|
|
bool *succeeded);
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_NewArrayObject(JSContext *cx, const JS::HandleValueArray& contents);
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_NewArrayObject(JSContext *cx, size_t length);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IsArrayObject(JSContext *cx, JS::HandleValue value);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IsArrayObject(JSContext *cx, JS::HandleObject obj);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_GetArrayLength(JSContext *cx, JS::Handle<JSObject*> obj, uint32_t *lengthp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_SetArrayLength(JSContext *cx, JS::Handle<JSObject*> obj, uint32_t length);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DefineElement(JSContext *cx, JSObject *obj, uint32_t index, jsval value,
|
|
JSPropertyOp getter, JSStrictPropertyOp setter, unsigned attrs);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_AlreadyHasOwnElement(JSContext *cx, JS::HandleObject obj, uint32_t index, bool *foundp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_HasElement(JSContext *cx, JS::HandleObject obj, uint32_t index, bool *foundp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_LookupElement(JSContext *cx, JS::HandleObject obj, uint32_t index, JS::MutableHandleValue vp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_GetElement(JSContext *cx, JS::HandleObject obj, uint32_t index, JS::MutableHandleValue vp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ForwardGetElementTo(JSContext *cx, JS::HandleObject obj, uint32_t index,
|
|
JS::HandleObject onBehalfOf, JS::MutableHandleValue vp);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_SetElement(JSContext *cx, JS::HandleObject obj, uint32_t index, JS::HandleValue v);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_SetElement(JSContext *cx, JS::HandleObject obj, uint32_t index, JS::HandleObject v);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_SetElement(JSContext *cx, JS::HandleObject obj, uint32_t index, JS::HandleString v);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_SetElement(JSContext *cx, JS::HandleObject obj, uint32_t index, int32_t v);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_SetElement(JSContext *cx, JS::HandleObject obj, uint32_t index, uint32_t v);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_SetElement(JSContext *cx, JS::HandleObject obj, uint32_t index, double v);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DeleteElement(JSContext *cx, JS::HandleObject obj, uint32_t index);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DeleteElement2(JSContext *cx, JS::HandleObject obj, uint32_t index, bool *succeeded);
|
|
|
|
/*
|
|
* Remove all configurable properties from the given (non-global) object and
|
|
* assign undefined to all writable data properties.
|
|
*/
|
|
JS_PUBLIC_API(void)
|
|
JS_ClearNonGlobalObject(JSContext *cx, JS::HandleObject obj);
|
|
|
|
/*
|
|
* Assign 'undefined' to all of the object's non-reserved slots. Note: this is
|
|
* done for all slots, regardless of the associated property descriptor.
|
|
*/
|
|
JS_PUBLIC_API(void)
|
|
JS_SetAllNonReservedSlotsToUndefined(JSContext *cx, JSObject *objArg);
|
|
|
|
/*
|
|
* Create a new array buffer with the given contents. On success, the ownership
|
|
* is transferred to the new array buffer.
|
|
*/
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_NewArrayBufferWithContents(JSContext *cx, size_t nbytes, void *contents);
|
|
|
|
/*
|
|
* Steal the contents of the given array buffer. The array buffer has its
|
|
* length set to 0 and its contents array cleared. The caller takes ownership
|
|
* of the return value and must free it or transfer ownership via
|
|
* JS_NewArrayBufferWithContents when done using it.
|
|
*/
|
|
extern JS_PUBLIC_API(void *)
|
|
JS_StealArrayBufferContents(JSContext *cx, JS::HandleObject obj);
|
|
|
|
/*
|
|
* Allocate memory that may be eventually passed to
|
|
* JS_NewArrayBufferWithContents. |maybecx| is optional; if a non-nullptr cx is
|
|
* given, it will be used for memory accounting and OOM reporting. |nbytes| is
|
|
* the number of payload bytes required.
|
|
*/
|
|
extern JS_PUBLIC_API(void *)
|
|
JS_AllocateArrayBufferContents(JSContext *maybecx, uint32_t nbytes);
|
|
|
|
/*
|
|
* Reallocate memory allocated by JS_AllocateArrayBufferContents, growing or
|
|
* shrinking it as appropriate. If oldContents is null then this behaves like
|
|
* JS_AllocateArrayBufferContents.
|
|
*/
|
|
extern JS_PUBLIC_API(void *)
|
|
JS_ReallocateArrayBufferContents(JSContext *cx, uint32_t nbytes, void *oldContents, uint32_t oldNbytes);
|
|
|
|
/*
|
|
* Create a new mapped array buffer with the given memory mapped contents. On success,
|
|
* the ownership is transferred to the new mapped array buffer.
|
|
*/
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_NewMappedArrayBufferWithContents(JSContext *cx, size_t nbytes, void *contents);
|
|
|
|
/*
|
|
* Create memory mapped array buffer contents.
|
|
* Caller must take care of closing fd after calling this function.
|
|
*/
|
|
extern JS_PUBLIC_API(void *)
|
|
JS_CreateMappedArrayBufferContents(int fd, size_t offset, size_t length);
|
|
|
|
/*
|
|
* Release the allocated resource of mapped array buffer contents before the
|
|
* object is created.
|
|
* If a new object has been created by JS_NewMappedArrayBufferWithContents()
|
|
* with this content, then JS_NeuterArrayBuffer() should be used instead to
|
|
* release the resource used by the object.
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
JS_ReleaseMappedArrayBufferContents(void *contents, size_t length);
|
|
|
|
extern JS_PUBLIC_API(JSIdArray *)
|
|
JS_Enumerate(JSContext *cx, JS::HandleObject obj);
|
|
|
|
/*
|
|
* Create an object to iterate over enumerable properties of obj, in arbitrary
|
|
* property definition order. NB: This differs from longstanding for..in loop
|
|
* order, which uses order of property definition in obj.
|
|
*/
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_NewPropertyIterator(JSContext *cx, JS::Handle<JSObject*> obj);
|
|
|
|
/*
|
|
* Return true on success with *idp containing the id of the next enumerable
|
|
* property to visit using iterobj, or JSID_IS_VOID if there is no such property
|
|
* left to visit. Return false on error.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_NextProperty(JSContext *cx, JS::Handle<JSObject*> iterobj, jsid *idp);
|
|
|
|
extern JS_PUBLIC_API(jsval)
|
|
JS_GetReservedSlot(JSObject *obj, uint32_t index);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetReservedSlot(JSObject *obj, uint32_t index, jsval v);
|
|
|
|
/************************************************************************/
|
|
|
|
/*
|
|
* Functions and scripts.
|
|
*/
|
|
extern JS_PUBLIC_API(JSFunction *)
|
|
JS_NewFunction(JSContext *cx, JSNative call, unsigned nargs, unsigned flags,
|
|
JS::Handle<JSObject*> parent, const char *name);
|
|
|
|
/*
|
|
* Create the function with the name given by the id. JSID_IS_STRING(id) must
|
|
* be true.
|
|
*/
|
|
extern JS_PUBLIC_API(JSFunction *)
|
|
JS_NewFunctionById(JSContext *cx, JSNative call, unsigned nargs, unsigned flags,
|
|
JS::Handle<JSObject*> parent, JS::Handle<jsid> id);
|
|
|
|
namespace JS {
|
|
|
|
extern JS_PUBLIC_API(JSFunction *)
|
|
GetSelfHostedFunction(JSContext *cx, const char *selfHostedName, JS::Handle<jsid> id,
|
|
unsigned nargs);
|
|
|
|
} /* namespace JS */
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_GetFunctionObject(JSFunction *fun);
|
|
|
|
/*
|
|
* Return the function's identifier as a JSString, or null if fun is unnamed.
|
|
* The returned string lives as long as fun, so you don't need to root a saved
|
|
* reference to it if fun is well-connected or rooted, and provided you bound
|
|
* the use of the saved reference by fun's lifetime.
|
|
*/
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_GetFunctionId(JSFunction *fun);
|
|
|
|
/*
|
|
* Return a function's display name. This is the defined name if one was given
|
|
* where the function was defined, or it could be an inferred name by the JS
|
|
* engine in the case that the function was defined to be anonymous. This can
|
|
* still return nullptr if a useful display name could not be inferred. The
|
|
* same restrictions on rooting as those in JS_GetFunctionId apply.
|
|
*/
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_GetFunctionDisplayId(JSFunction *fun);
|
|
|
|
/*
|
|
* Return the arity (length) of fun.
|
|
*/
|
|
extern JS_PUBLIC_API(uint16_t)
|
|
JS_GetFunctionArity(JSFunction *fun);
|
|
|
|
/*
|
|
* Infallible predicate to test whether obj is a function object (faster than
|
|
* comparing obj's class name to "Function", but equivalent unless someone has
|
|
* overwritten the "Function" identifier with a different constructor and then
|
|
* created instances using that constructor that might be passed in as obj).
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ObjectIsFunction(JSContext *cx, JSObject *obj);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ObjectIsCallable(JSContext *cx, JSObject *obj);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IsNativeFunction(JSObject *funobj, JSNative call);
|
|
|
|
/* Return whether the given function is a valid constructor. */
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IsConstructor(JSFunction *fun);
|
|
|
|
/*
|
|
* Bind the given callable to use the given object as "this".
|
|
*
|
|
* If |callable| is not callable, will throw and return nullptr.
|
|
*/
|
|
extern JS_PUBLIC_API(JSObject*)
|
|
JS_BindCallable(JSContext *cx, JS::Handle<JSObject*> callable, JS::Handle<JSObject*> newThis);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_DefineFunctions(JSContext *cx, JS::Handle<JSObject*> obj, const JSFunctionSpec *fs);
|
|
|
|
extern JS_PUBLIC_API(JSFunction *)
|
|
JS_DefineFunction(JSContext *cx, JS::Handle<JSObject*> obj, const char *name, JSNative call,
|
|
unsigned nargs, unsigned attrs);
|
|
|
|
extern JS_PUBLIC_API(JSFunction *)
|
|
JS_DefineUCFunction(JSContext *cx, JS::Handle<JSObject*> obj,
|
|
const jschar *name, size_t namelen, JSNative call,
|
|
unsigned nargs, unsigned attrs);
|
|
|
|
extern JS_PUBLIC_API(JSFunction *)
|
|
JS_DefineFunctionById(JSContext *cx, JS::Handle<JSObject*> obj, JS::Handle<jsid> id, JSNative call,
|
|
unsigned nargs, unsigned attrs);
|
|
|
|
/*
|
|
* Clone a top-level function into a new scope. This function will dynamically
|
|
* fail if funobj was lexically nested inside some other function.
|
|
*/
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_CloneFunctionObject(JSContext *cx, JS::Handle<JSObject*> funobj, JS::Handle<JSObject*> parent);
|
|
|
|
/*
|
|
* Given a buffer, return false if the buffer might become a valid
|
|
* javascript statement with the addition of more lines. Otherwise return
|
|
* true. The intent is to support interactive compilation - accumulate
|
|
* lines in a buffer until JS_BufferIsCompilableUnit is true, then pass it to
|
|
* the compiler.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_BufferIsCompilableUnit(JSContext *cx, JS::Handle<JSObject*> obj, const char *utf8,
|
|
size_t length);
|
|
|
|
extern JS_PUBLIC_API(JSScript *)
|
|
JS_CompileScript(JSContext *cx, JS::HandleObject obj,
|
|
const char *ascii, size_t length,
|
|
const JS::CompileOptions &options);
|
|
|
|
extern JS_PUBLIC_API(JSScript *)
|
|
JS_CompileUCScript(JSContext *cx, JS::HandleObject obj,
|
|
const jschar *chars, size_t length,
|
|
const JS::CompileOptions &options);
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_GetGlobalFromScript(JSScript *script);
|
|
|
|
extern JS_PUBLIC_API(JSFunction *)
|
|
JS_CompileFunction(JSContext *cx, JS::HandleObject obj, const char *name,
|
|
unsigned nargs, const char *const *argnames,
|
|
const char *bytes, size_t length,
|
|
const JS::CompileOptions &options);
|
|
|
|
extern JS_PUBLIC_API(JSFunction *)
|
|
JS_CompileUCFunction(JSContext *cx, JS::HandleObject obj, const char *name,
|
|
unsigned nargs, const char *const *argnames,
|
|
const jschar *chars, size_t length,
|
|
const JS::CompileOptions &options);
|
|
|
|
namespace JS {
|
|
|
|
/* Options for JavaScript compilation. */
|
|
|
|
/*
|
|
* In the most common use case, a CompileOptions instance is allocated on the
|
|
* stack, and holds non-owning references to non-POD option values: strings;
|
|
* principals; objects; and so on. The code declaring the instance guarantees
|
|
* that such option values will outlive the CompileOptions itself: objects are
|
|
* otherwise rooted; principals have had their reference counts bumped; strings
|
|
* will not be freed until the CompileOptions goes out of scope. In this
|
|
* situation, CompileOptions only refers to things others own, so it can be
|
|
* lightweight.
|
|
*
|
|
* In some cases, however, we need to hold compilation options with a
|
|
* non-stack-like lifetime. For example, JS::CompileOffThread needs to save
|
|
* compilation options where a worker thread can find them, and then return
|
|
* immediately. The worker thread will come along at some later point, and use
|
|
* the options.
|
|
*
|
|
* The compiler itself just needs to be able to access a collection of options;
|
|
* it doesn't care who owns them, or what's keeping them alive. It does its own
|
|
* addrefs/copies/tracing/etc.
|
|
*
|
|
* So, we have a class hierarchy that reflects these three use cases:
|
|
*
|
|
* - ReadOnlyCompileOptions is the common base class. It can be used by code
|
|
* that simply needs to access options set elsewhere, like the compiler.
|
|
*
|
|
* - The usual CompileOptions class must be stack-allocated, and holds
|
|
* non-owning references to the filename, element, and so on. It's derived
|
|
* from ReadOnlyCompileOptions, so the compiler can use it.
|
|
*
|
|
* - OwningCompileOptions roots / copies / reference counts of all its values,
|
|
* and unroots / frees / releases them when it is destructed. It too is
|
|
* derived from ReadOnlyCompileOptions, so the compiler accepts it.
|
|
*/
|
|
|
|
/*
|
|
* The common base class for the CompileOptions hierarchy.
|
|
*
|
|
* Use this in code that only needs to access compilation options created
|
|
* elsewhere, like the compiler. Don't instantiate this class (the constructor
|
|
* is protected anyway); instead, create instances only of the derived classes:
|
|
* CompileOptions and OwningCompileOptions.
|
|
*/
|
|
class JS_FRIEND_API(ReadOnlyCompileOptions)
|
|
{
|
|
friend class CompileOptions;
|
|
|
|
protected:
|
|
JSPrincipals *originPrincipals_;
|
|
const char *filename_;
|
|
const char *introducerFilename_;
|
|
const jschar *sourceMapURL_;
|
|
|
|
// This constructor leaves 'version' set to JSVERSION_UNKNOWN. The structure
|
|
// is unusable until that's set to something more specific; the derived
|
|
// classes' constructors take care of that, in ways appropriate to their
|
|
// purpose.
|
|
ReadOnlyCompileOptions()
|
|
: originPrincipals_(nullptr),
|
|
filename_(nullptr),
|
|
introducerFilename_(nullptr),
|
|
sourceMapURL_(nullptr),
|
|
version(JSVERSION_UNKNOWN),
|
|
versionSet(false),
|
|
utf8(false),
|
|
lineno(1),
|
|
column(0),
|
|
compileAndGo(false),
|
|
forEval(false),
|
|
defineOnScope(true),
|
|
noScriptRval(false),
|
|
selfHostingMode(false),
|
|
canLazilyParse(true),
|
|
strictOption(false),
|
|
extraWarningsOption(false),
|
|
werrorOption(false),
|
|
asmJSOption(false),
|
|
forceAsync(false),
|
|
installedFile(false),
|
|
sourceIsLazy(false),
|
|
introductionType(nullptr),
|
|
introductionLineno(0),
|
|
introductionOffset(0),
|
|
hasIntroductionInfo(false)
|
|
{ }
|
|
|
|
// Set all POD options (those not requiring reference counts, copies,
|
|
// rooting, or other hand-holding) to their values in |rhs|.
|
|
void copyPODOptions(const ReadOnlyCompileOptions &rhs);
|
|
|
|
public:
|
|
// Read-only accessors for non-POD options. The proper way to set these
|
|
// depends on the derived type.
|
|
JSPrincipals *originPrincipals(js::ExclusiveContext *cx) const;
|
|
const char *filename() const { return filename_; }
|
|
const char *introducerFilename() const { return introducerFilename_; }
|
|
const jschar *sourceMapURL() const { return sourceMapURL_; }
|
|
virtual JSObject *element() const = 0;
|
|
virtual JSString *elementAttributeName() const = 0;
|
|
virtual JSScript *introductionScript() const = 0;
|
|
|
|
// POD options.
|
|
JSVersion version;
|
|
bool versionSet;
|
|
bool utf8;
|
|
unsigned lineno;
|
|
unsigned column;
|
|
bool compileAndGo;
|
|
bool forEval;
|
|
bool defineOnScope;
|
|
bool noScriptRval;
|
|
bool selfHostingMode;
|
|
bool canLazilyParse;
|
|
bool strictOption;
|
|
bool extraWarningsOption;
|
|
bool werrorOption;
|
|
bool asmJSOption;
|
|
bool forceAsync;
|
|
bool installedFile; // 'true' iff pre-compiling js file in packaged app
|
|
bool sourceIsLazy;
|
|
|
|
// |introductionType| is a statically allocated C string:
|
|
// one of "eval", "Function", or "GeneratorFunction".
|
|
const char *introductionType;
|
|
unsigned introductionLineno;
|
|
uint32_t introductionOffset;
|
|
bool hasIntroductionInfo;
|
|
|
|
// Wrap any compilation option values that need it as appropriate for
|
|
// use from |compartment|.
|
|
virtual bool wrap(JSContext *cx, JSCompartment *compartment) = 0;
|
|
|
|
private:
|
|
static JSObject * const nullObjectPtr;
|
|
void operator=(const ReadOnlyCompileOptions &) MOZ_DELETE;
|
|
};
|
|
|
|
/*
|
|
* Compilation options, with dynamic lifetime. An instance of this type
|
|
* makes a copy of / holds / roots all dynamically allocated resources
|
|
* (principals; elements; strings) that it refers to. Its destructor frees
|
|
* / drops / unroots them. This is heavier than CompileOptions, below, but
|
|
* unlike CompileOptions, it can outlive any given stack frame.
|
|
*
|
|
* Note that this *roots* any JS values it refers to - they're live
|
|
* unconditionally. Thus, instances of this type can't be owned, directly
|
|
* or indirectly, by a JavaScript object: if any value that this roots ever
|
|
* comes to refer to the object that owns this, then the whole cycle, and
|
|
* anything else it entrains, will never be freed.
|
|
*/
|
|
class JS_FRIEND_API(OwningCompileOptions) : public ReadOnlyCompileOptions
|
|
{
|
|
JSRuntime *runtime;
|
|
PersistentRootedObject elementRoot;
|
|
PersistentRootedString elementAttributeNameRoot;
|
|
PersistentRootedScript introductionScriptRoot;
|
|
|
|
public:
|
|
// A minimal constructor, for use with OwningCompileOptions::copy. This
|
|
// leaves |this.version| set to JSVERSION_UNKNOWN; the instance
|
|
// shouldn't be used until we've set that to something real (as |copy|
|
|
// will).
|
|
explicit OwningCompileOptions(JSContext *cx);
|
|
~OwningCompileOptions();
|
|
|
|
JSObject *element() const MOZ_OVERRIDE { return elementRoot; }
|
|
JSString *elementAttributeName() const MOZ_OVERRIDE { return elementAttributeNameRoot; }
|
|
JSScript *introductionScript() const MOZ_OVERRIDE { return introductionScriptRoot; }
|
|
|
|
// Set this to a copy of |rhs|. Return false on OOM.
|
|
bool copy(JSContext *cx, const ReadOnlyCompileOptions &rhs);
|
|
|
|
/* These setters make copies of their string arguments, and are fallible. */
|
|
bool setFile(JSContext *cx, const char *f);
|
|
bool setFileAndLine(JSContext *cx, const char *f, unsigned l);
|
|
bool setSourceMapURL(JSContext *cx, const jschar *s);
|
|
bool setIntroducerFilename(JSContext *cx, const char *s);
|
|
|
|
/* These setters are infallible, and can be chained. */
|
|
OwningCompileOptions &setLine(unsigned l) { lineno = l; return *this; }
|
|
OwningCompileOptions &setElement(JSObject *e) {
|
|
elementRoot = e;
|
|
return *this;
|
|
}
|
|
OwningCompileOptions &setElementAttributeName(JSString *p) {
|
|
elementAttributeNameRoot = p;
|
|
return *this;
|
|
}
|
|
OwningCompileOptions &setIntroductionScript(JSScript *s) {
|
|
introductionScriptRoot = s;
|
|
return *this;
|
|
}
|
|
OwningCompileOptions &setOriginPrincipals(JSPrincipals *p) {
|
|
if (p) JS_HoldPrincipals(p);
|
|
if (originPrincipals_) JS_DropPrincipals(runtime, originPrincipals_);
|
|
originPrincipals_ = p;
|
|
return *this;
|
|
}
|
|
OwningCompileOptions &setVersion(JSVersion v) {
|
|
version = v;
|
|
versionSet = true;
|
|
return *this;
|
|
}
|
|
OwningCompileOptions &setUTF8(bool u) { utf8 = u; return *this; }
|
|
OwningCompileOptions &setColumn(unsigned c) { column = c; return *this; }
|
|
OwningCompileOptions &setCompileAndGo(bool cng) { compileAndGo = cng; return *this; }
|
|
OwningCompileOptions &setForEval(bool eval) { forEval = eval; return *this; }
|
|
OwningCompileOptions &setDefineOnScope(bool define) { defineOnScope = define; return *this; }
|
|
OwningCompileOptions &setNoScriptRval(bool nsr) { noScriptRval = nsr; return *this; }
|
|
OwningCompileOptions &setSelfHostingMode(bool shm) { selfHostingMode = shm; return *this; }
|
|
OwningCompileOptions &setCanLazilyParse(bool clp) { canLazilyParse = clp; return *this; }
|
|
OwningCompileOptions &setSourceIsLazy(bool l) { sourceIsLazy = l; return *this; }
|
|
OwningCompileOptions &setIntroductionType(const char *t) { introductionType = t; return *this; }
|
|
bool setIntroductionInfo(JSContext *cx, const char *introducerFn, const char *intro,
|
|
unsigned line, JSScript *script, uint32_t offset)
|
|
{
|
|
if (!setIntroducerFilename(cx, introducerFn))
|
|
return false;
|
|
introductionType = intro;
|
|
introductionLineno = line;
|
|
introductionScriptRoot = script;
|
|
introductionOffset = offset;
|
|
hasIntroductionInfo = true;
|
|
return true;
|
|
}
|
|
|
|
virtual bool wrap(JSContext *cx, JSCompartment *compartment) MOZ_OVERRIDE;
|
|
|
|
private:
|
|
void operator=(const CompileOptions &rhs) MOZ_DELETE;
|
|
};
|
|
|
|
/*
|
|
* Compilation options stored on the stack. An instance of this type
|
|
* simply holds references to dynamically allocated resources (element;
|
|
* filename; source map URL) that are owned by something else. If you
|
|
* create an instance of this type, it's up to you to guarantee that
|
|
* everything you store in it will outlive it.
|
|
*/
|
|
class MOZ_STACK_CLASS JS_FRIEND_API(CompileOptions) : public ReadOnlyCompileOptions
|
|
{
|
|
RootedObject elementRoot;
|
|
RootedString elementAttributeNameRoot;
|
|
RootedScript introductionScriptRoot;
|
|
|
|
public:
|
|
explicit CompileOptions(JSContext *cx, JSVersion version = JSVERSION_UNKNOWN);
|
|
CompileOptions(js::ContextFriendFields *cx, const ReadOnlyCompileOptions &rhs)
|
|
: ReadOnlyCompileOptions(), elementRoot(cx), elementAttributeNameRoot(cx),
|
|
introductionScriptRoot(cx)
|
|
{
|
|
copyPODOptions(rhs);
|
|
|
|
originPrincipals_ = rhs.originPrincipals_;
|
|
filename_ = rhs.filename();
|
|
sourceMapURL_ = rhs.sourceMapURL();
|
|
elementRoot = rhs.element();
|
|
elementAttributeNameRoot = rhs.elementAttributeName();
|
|
introductionScriptRoot = rhs.introductionScript();
|
|
}
|
|
|
|
JSObject *element() const MOZ_OVERRIDE { return elementRoot; }
|
|
JSString *elementAttributeName() const MOZ_OVERRIDE { return elementAttributeNameRoot; }
|
|
JSScript *introductionScript() const MOZ_OVERRIDE { return introductionScriptRoot; }
|
|
|
|
CompileOptions &setFile(const char *f) { filename_ = f; return *this; }
|
|
CompileOptions &setLine(unsigned l) { lineno = l; return *this; }
|
|
CompileOptions &setFileAndLine(const char *f, unsigned l) {
|
|
filename_ = f; lineno = l; return *this;
|
|
}
|
|
CompileOptions &setSourceMapURL(const jschar *s) { sourceMapURL_ = s; return *this; }
|
|
CompileOptions &setElement(JSObject *e) { elementRoot = e; return *this; }
|
|
CompileOptions &setElementAttributeName(JSString *p) {
|
|
elementAttributeNameRoot = p;
|
|
return *this;
|
|
}
|
|
CompileOptions &setIntroductionScript(JSScript *s) {
|
|
introductionScriptRoot = s;
|
|
return *this;
|
|
}
|
|
CompileOptions &setOriginPrincipals(JSPrincipals *p) {
|
|
originPrincipals_ = p;
|
|
return *this;
|
|
}
|
|
CompileOptions &setVersion(JSVersion v) {
|
|
version = v;
|
|
versionSet = true;
|
|
return *this;
|
|
}
|
|
CompileOptions &setUTF8(bool u) { utf8 = u; return *this; }
|
|
CompileOptions &setColumn(unsigned c) { column = c; return *this; }
|
|
CompileOptions &setCompileAndGo(bool cng) { compileAndGo = cng; return *this; }
|
|
CompileOptions &setForEval(bool eval) { forEval = eval; return *this; }
|
|
CompileOptions &setDefineOnScope(bool define) { defineOnScope = define; return *this; }
|
|
CompileOptions &setNoScriptRval(bool nsr) { noScriptRval = nsr; return *this; }
|
|
CompileOptions &setSelfHostingMode(bool shm) { selfHostingMode = shm; return *this; }
|
|
CompileOptions &setCanLazilyParse(bool clp) { canLazilyParse = clp; return *this; }
|
|
CompileOptions &setSourceIsLazy(bool l) { sourceIsLazy = l; return *this; }
|
|
CompileOptions &setIntroductionType(const char *t) { introductionType = t; return *this; }
|
|
CompileOptions &setIntroductionInfo(const char *introducerFn, const char *intro,
|
|
unsigned line, JSScript *script, uint32_t offset)
|
|
{
|
|
introducerFilename_ = introducerFn;
|
|
introductionType = intro;
|
|
introductionLineno = line;
|
|
introductionScriptRoot = script;
|
|
introductionOffset = offset;
|
|
hasIntroductionInfo = true;
|
|
return *this;
|
|
}
|
|
|
|
virtual bool wrap(JSContext *cx, JSCompartment *compartment) MOZ_OVERRIDE;
|
|
|
|
private:
|
|
void operator=(const CompileOptions &rhs) MOZ_DELETE;
|
|
};
|
|
|
|
extern JS_PUBLIC_API(JSScript *)
|
|
Compile(JSContext *cx, JS::HandleObject obj, const ReadOnlyCompileOptions &options,
|
|
const char *bytes, size_t length);
|
|
|
|
extern JS_PUBLIC_API(JSScript *)
|
|
Compile(JSContext *cx, JS::HandleObject obj, const ReadOnlyCompileOptions &options,
|
|
const jschar *chars, size_t length);
|
|
|
|
extern JS_PUBLIC_API(JSScript *)
|
|
Compile(JSContext *cx, JS::HandleObject obj, const ReadOnlyCompileOptions &options,
|
|
SourceBufferHolder &srcBuf);
|
|
|
|
extern JS_PUBLIC_API(JSScript *)
|
|
Compile(JSContext *cx, JS::HandleObject obj, const ReadOnlyCompileOptions &options, FILE *file);
|
|
|
|
extern JS_PUBLIC_API(JSScript *)
|
|
Compile(JSContext *cx, JS::HandleObject obj, const ReadOnlyCompileOptions &options, const char *filename);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
CanCompileOffThread(JSContext *cx, const ReadOnlyCompileOptions &options, size_t length);
|
|
|
|
/*
|
|
* Off thread compilation control flow.
|
|
*
|
|
* After successfully triggering an off thread compile of a script, the
|
|
* callback will eventually be invoked with the specified data and a token
|
|
* for the compilation. The callback will be invoked while off the main thread,
|
|
* so must ensure that its operations are thread safe. Afterwards,
|
|
* FinishOffThreadScript must be invoked on the main thread to get the result
|
|
* script or nullptr. If maybecx is not specified, the resources will be freed,
|
|
* but no script will be returned.
|
|
*
|
|
* The characters passed in to CompileOffThread must remain live until the
|
|
* callback is invoked, and the resulting script will be rooted until the call
|
|
* to FinishOffThreadScript.
|
|
*/
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
CompileOffThread(JSContext *cx, const ReadOnlyCompileOptions &options,
|
|
const jschar *chars, size_t length,
|
|
OffThreadCompileCallback callback, void *callbackData);
|
|
|
|
extern JS_PUBLIC_API(JSScript *)
|
|
FinishOffThreadScript(JSContext *maybecx, JSRuntime *rt, void *token);
|
|
|
|
extern JS_PUBLIC_API(JSFunction *)
|
|
CompileFunction(JSContext *cx, JS::HandleObject obj, const ReadOnlyCompileOptions &options,
|
|
const char *name, unsigned nargs, const char *const *argnames,
|
|
const char *bytes, size_t length);
|
|
|
|
extern JS_PUBLIC_API(JSFunction *)
|
|
CompileFunction(JSContext *cx, JS::HandleObject obj, const ReadOnlyCompileOptions &options,
|
|
const char *name, unsigned nargs, const char *const *argnames,
|
|
const jschar *chars, size_t length);
|
|
|
|
extern JS_PUBLIC_API(JSFunction *)
|
|
CompileFunction(JSContext *cx, JS::HandleObject obj, const ReadOnlyCompileOptions &options,
|
|
const char *name, unsigned nargs, const char *const *argnames,
|
|
SourceBufferHolder &srcBuf);
|
|
|
|
} /* namespace JS */
|
|
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_DecompileScript(JSContext *cx, JS::Handle<JSScript*> script, const char *name, unsigned indent);
|
|
|
|
/*
|
|
* API extension: OR this into indent to avoid pretty-printing the decompiled
|
|
* source resulting from JS_DecompileFunction{,Body}.
|
|
*/
|
|
#define JS_DONT_PRETTY_PRINT ((unsigned)0x8000)
|
|
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_DecompileFunction(JSContext *cx, JS::Handle<JSFunction*> fun, unsigned indent);
|
|
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_DecompileFunctionBody(JSContext *cx, JS::Handle<JSFunction*> fun, unsigned indent);
|
|
|
|
/*
|
|
* NB: JS_ExecuteScript and the JS_Evaluate*Script* quadruplets use the obj
|
|
* parameter as the initial scope chain header, the 'this' keyword value, and
|
|
* the variables object (ECMA parlance for where 'var' and 'function' bind
|
|
* names) of the execution context for script.
|
|
*
|
|
* Using obj as the variables object is problematic if obj's parent (which is
|
|
* the scope chain link; see JS_SetParent and JS_NewObject) is not null: in
|
|
* this case, variables created by 'var x = 0', e.g., go in obj, but variables
|
|
* created by assignment to an unbound id, 'x = 0', go in the last object on
|
|
* the scope chain linked by parent.
|
|
*
|
|
* ECMA calls that last scoping object the "global object", but note that many
|
|
* embeddings have several such objects. ECMA requires that "global code" be
|
|
* executed with the variables object equal to this global object. But these
|
|
* JS API entry points provide freedom to execute code against a "sub-global",
|
|
* i.e., a parented or scoped object, in which case the variables object will
|
|
* differ from the last object on the scope chain, resulting in confusing and
|
|
* non-ECMA explicit vs. implicit variable creation.
|
|
*
|
|
* Caveat embedders: unless you already depend on this buggy variables object
|
|
* binding behavior, you should call ContextOptionsRef(cx).setVarObjFix(true)
|
|
* for each context in the application, if you pass parented objects as the obj
|
|
* parameter, or may ever pass such objects in the future.
|
|
*
|
|
* Why a runtime option? The alternative is to add six or so new API entry
|
|
* points with signatures matching the following six, and that doesn't seem
|
|
* worth the code bloat cost. Such new entry points would probably have less
|
|
* obvious names, too, so would not tend to be used. The JS_SetOption call,
|
|
* OTOH, can be more easily hacked into existing code that does not depend on
|
|
* the bug; such code can continue to use the familiar JS_EvaluateScript,
|
|
* etc., entry points.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ExecuteScript(JSContext *cx, JS::HandleObject obj, JS::HandleScript script, JS::MutableHandleValue rval);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ExecuteScript(JSContext *cx, JS::HandleObject obj, JS::HandleScript script);
|
|
|
|
namespace JS {
|
|
|
|
/*
|
|
* Like the above, but handles a cross-compartment script. If the script is
|
|
* cross-compartment, it is cloned into the current compartment before executing.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
CloneAndExecuteScript(JSContext *cx, JS::Handle<JSObject*> obj, JS::Handle<JSScript*> script);
|
|
|
|
} /* namespace JS */
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ExecuteScriptVersion(JSContext *cx, JS::HandleObject obj, JS::HandleScript script,
|
|
JS::MutableHandleValue rval, JSVersion version);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ExecuteScriptVersion(JSContext *cx, JS::HandleObject obj, JS::HandleScript script,
|
|
JSVersion version);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_EvaluateScript(JSContext *cx, JS::HandleObject obj,
|
|
const char *bytes, unsigned length,
|
|
const char *filename, unsigned lineno,
|
|
JS::MutableHandleValue rval);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_EvaluateScript(JSContext *cx, JS::HandleObject obj,
|
|
const char *bytes, unsigned length,
|
|
const char *filename, unsigned lineno);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_EvaluateUCScript(JSContext *cx, JS::Handle<JSObject*> obj,
|
|
const jschar *chars, unsigned length,
|
|
const char *filename, unsigned lineno,
|
|
JS::MutableHandle<JS::Value> rval);
|
|
|
|
namespace JS {
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
Evaluate(JSContext *cx, JS::HandleObject obj, const ReadOnlyCompileOptions &options,
|
|
SourceBufferHolder &srcBuf, JS::MutableHandleValue rval);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
Evaluate(JSContext *cx, JS::HandleObject obj, const ReadOnlyCompileOptions &options,
|
|
const jschar *chars, size_t length, JS::MutableHandleValue rval);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
Evaluate(JSContext *cx, JS::HandleObject obj, const ReadOnlyCompileOptions &options,
|
|
const char *bytes, size_t length, JS::MutableHandleValue rval);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
Evaluate(JSContext *cx, JS::HandleObject obj, const ReadOnlyCompileOptions &options,
|
|
const char *filename, JS::MutableHandleValue rval);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
Evaluate(JSContext *cx, JS::HandleObject obj, const ReadOnlyCompileOptions &options,
|
|
SourceBufferHolder &srcBuf);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
Evaluate(JSContext *cx, JS::HandleObject obj, const ReadOnlyCompileOptions &options,
|
|
const jschar *chars, size_t length);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
Evaluate(JSContext *cx, JS::HandleObject obj, const ReadOnlyCompileOptions &options,
|
|
const char *bytes, size_t length);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
Evaluate(JSContext *cx, JS::HandleObject obj, const ReadOnlyCompileOptions &options,
|
|
const char *filename);
|
|
|
|
} /* namespace JS */
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_CallFunction(JSContext *cx, JS::HandleObject obj, JS::HandleFunction fun,
|
|
const JS::HandleValueArray& args, JS::MutableHandleValue rval);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_CallFunctionName(JSContext *cx, JS::HandleObject obj, const char *name,
|
|
const JS::HandleValueArray& args, JS::MutableHandleValue rval);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_CallFunctionValue(JSContext *cx, JS::HandleObject obj, JS::HandleValue fval,
|
|
const JS::HandleValueArray& args, JS::MutableHandleValue rval);
|
|
|
|
namespace JS {
|
|
|
|
static inline bool
|
|
Call(JSContext *cx, JS::HandleObject thisObj, JS::HandleFunction fun,
|
|
const JS::HandleValueArray &args, MutableHandleValue rval)
|
|
{
|
|
return !!JS_CallFunction(cx, thisObj, fun, args, rval);
|
|
}
|
|
|
|
static inline bool
|
|
Call(JSContext *cx, JS::HandleObject thisObj, const char *name, const JS::HandleValueArray& args,
|
|
MutableHandleValue rval)
|
|
{
|
|
return !!JS_CallFunctionName(cx, thisObj, name, args, rval);
|
|
}
|
|
|
|
static inline bool
|
|
Call(JSContext *cx, JS::HandleObject thisObj, JS::HandleValue fun, const JS::HandleValueArray& args,
|
|
MutableHandleValue rval)
|
|
{
|
|
return !!JS_CallFunctionValue(cx, thisObj, fun, args, rval);
|
|
}
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
Call(JSContext *cx, JS::HandleValue thisv, JS::HandleValue fun, const JS::HandleValueArray& args,
|
|
MutableHandleValue rval);
|
|
|
|
static inline bool
|
|
Call(JSContext *cx, JS::HandleValue thisv, JS::HandleObject funObj, const JS::HandleValueArray& args,
|
|
MutableHandleValue rval)
|
|
{
|
|
JS_ASSERT(funObj);
|
|
JS::RootedValue fun(cx, JS::ObjectValue(*funObj));
|
|
return Call(cx, thisv, fun, args, rval);
|
|
}
|
|
|
|
} /* namespace JS */
|
|
|
|
/*
|
|
* These functions allow setting an interrupt callback that will be called
|
|
* from the JS thread some time after any thread triggered the callback using
|
|
* JS_RequestInterruptCallback(rt).
|
|
*
|
|
* To schedule the GC and for other activities the engine internally triggers
|
|
* interrupt callbacks. The embedding should thus not rely on callbacks being
|
|
* triggered through the external API only.
|
|
*
|
|
* Important note: Additional callbacks can occur inside the callback handler
|
|
* if it re-enters the JS engine. The embedding must ensure that the callback
|
|
* is disconnected before attempting such re-entry.
|
|
*/
|
|
extern JS_PUBLIC_API(JSInterruptCallback)
|
|
JS_SetInterruptCallback(JSRuntime *rt, JSInterruptCallback callback);
|
|
|
|
extern JS_PUBLIC_API(JSInterruptCallback)
|
|
JS_GetInterruptCallback(JSRuntime *rt);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_RequestInterruptCallback(JSRuntime *rt);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IsRunning(JSContext *cx);
|
|
|
|
/*
|
|
* Saving and restoring frame chains.
|
|
*
|
|
* These two functions are used to set aside cx's call stack while that stack
|
|
* is inactive. After a call to JS_SaveFrameChain, it looks as if there is no
|
|
* code running on cx. Before calling JS_RestoreFrameChain, cx's call stack
|
|
* must be balanced and all nested calls to JS_SaveFrameChain must have had
|
|
* matching JS_RestoreFrameChain calls.
|
|
*
|
|
* JS_SaveFrameChain deals with cx not having any code running on it.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_SaveFrameChain(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_RestoreFrameChain(JSContext *cx);
|
|
|
|
#ifdef MOZ_TRACE_JSCALLS
|
|
/*
|
|
* The callback is expected to be quick and noninvasive. It should not
|
|
* request interrupts, turn on debugging, or produce uncaught JS
|
|
* exceptions. The state of the stack and registers in the context
|
|
* cannot be relied upon, since this callback may be invoked directly
|
|
* from either JIT. The 'entering' field means we are entering a
|
|
* function if it is positive, leaving a function if it is zero or
|
|
* negative.
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetFunctionCallback(JSContext *cx, JSFunctionCallback fcb);
|
|
|
|
extern JS_PUBLIC_API(JSFunctionCallback)
|
|
JS_GetFunctionCallback(JSContext *cx);
|
|
#endif /* MOZ_TRACE_JSCALLS */
|
|
|
|
/************************************************************************/
|
|
|
|
/*
|
|
* Strings.
|
|
*
|
|
* NB: JS_NewUCString takes ownership of bytes on success, avoiding a copy;
|
|
* but on error (signified by null return), it leaves chars owned by the
|
|
* caller. So the caller must free bytes in the error case, if it has no use
|
|
* for them. In contrast, all the JS_New*StringCopy* functions do not take
|
|
* ownership of the character memory passed to them -- they copy it.
|
|
*/
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_NewStringCopyN(JSContext *cx, const char *s, size_t n);
|
|
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_NewStringCopyZ(JSContext *cx, const char *s);
|
|
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_InternJSString(JSContext *cx, JS::HandleString str);
|
|
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_InternStringN(JSContext *cx, const char *s, size_t length);
|
|
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_InternString(JSContext *cx, const char *s);
|
|
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_NewUCString(JSContext *cx, jschar *chars, size_t length);
|
|
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_NewUCStringCopyN(JSContext *cx, const jschar *s, size_t n);
|
|
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_NewUCStringCopyZ(JSContext *cx, const jschar *s);
|
|
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_InternUCStringN(JSContext *cx, const jschar *s, size_t length);
|
|
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_InternUCString(JSContext *cx, const jschar *s);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_CompareStrings(JSContext *cx, JSString *str1, JSString *str2, int32_t *result);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_StringEqualsAscii(JSContext *cx, JSString *str, const char *asciiBytes, bool *match);
|
|
|
|
extern JS_PUBLIC_API(size_t)
|
|
JS_PutEscapedString(JSContext *cx, char *buffer, size_t size, JSString *str, char quote);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_FileEscapedString(FILE *fp, JSString *str, char quote);
|
|
|
|
/*
|
|
* Extracting string characters and length.
|
|
*
|
|
* While getting the length of a string is infallible, getting the chars can
|
|
* fail. As indicated by the lack of a JSContext parameter, there are two
|
|
* special cases where getting the chars is infallible:
|
|
*
|
|
* The first case is interned strings, i.e., strings from JS_InternString or
|
|
* JSID_TO_STRING(id), using JS_GetInternedStringChars*.
|
|
*
|
|
* The second case is "flat" strings that have been explicitly prepared in a
|
|
* fallible context by JS_FlattenString. To catch errors, a separate opaque
|
|
* JSFlatString type is returned by JS_FlattenString and expected by
|
|
* JS_GetFlatStringChars. Note, though, that this is purely a syntactic
|
|
* distinction: the input and output of JS_FlattenString are the same actual
|
|
* GC-thing so only one needs to be rooted. If a JSString is known to be flat,
|
|
* JS_ASSERT_STRING_IS_FLAT can be used to make a debug-checked cast. Example:
|
|
*
|
|
* // in a fallible context
|
|
* JSFlatString *fstr = JS_FlattenString(cx, str);
|
|
* if (!fstr)
|
|
* return false;
|
|
* JS_ASSERT(fstr == JS_ASSERT_STRING_IS_FLAT(str));
|
|
*
|
|
* // in an infallible context, for the same 'str'
|
|
* const jschar *chars = JS_GetFlatStringChars(fstr)
|
|
* JS_ASSERT(chars);
|
|
*
|
|
* The CharsZ APIs guarantee that the returned array has a null character at
|
|
* chars[length]. This can require additional copying so clients should prefer
|
|
* APIs without CharsZ if possible. The infallible functions also return
|
|
* null-terminated arrays. (There is no additional cost or non-Z alternative
|
|
* for the infallible functions, so 'Z' is left out of the identifier.)
|
|
*/
|
|
|
|
extern JS_PUBLIC_API(size_t)
|
|
JS_GetStringLength(JSString *str);
|
|
|
|
extern JS_PUBLIC_API(const jschar *)
|
|
JS_GetStringCharsAndLength(JSContext *cx, JSString *str, size_t *length);
|
|
|
|
extern JS_PUBLIC_API(const jschar *)
|
|
JS_GetInternedStringChars(JSString *str);
|
|
|
|
extern JS_PUBLIC_API(const jschar *)
|
|
JS_GetInternedStringCharsAndLength(JSString *str, size_t *length);
|
|
|
|
extern JS_PUBLIC_API(const jschar *)
|
|
JS_GetStringCharsZ(JSContext *cx, JSString *str);
|
|
|
|
extern JS_PUBLIC_API(const jschar *)
|
|
JS_GetStringCharsZAndLength(JSContext *cx, JSString *str, size_t *length);
|
|
|
|
extern JS_PUBLIC_API(JSFlatString *)
|
|
JS_FlattenString(JSContext *cx, JSString *str);
|
|
|
|
extern JS_PUBLIC_API(const jschar *)
|
|
JS_GetFlatStringChars(JSFlatString *str);
|
|
|
|
static MOZ_ALWAYS_INLINE JSFlatString *
|
|
JSID_TO_FLAT_STRING(jsid id)
|
|
{
|
|
JS_ASSERT(JSID_IS_STRING(id));
|
|
return (JSFlatString *)(JSID_BITS(id));
|
|
}
|
|
|
|
static MOZ_ALWAYS_INLINE JSFlatString *
|
|
JS_ASSERT_STRING_IS_FLAT(JSString *str)
|
|
{
|
|
JS_ASSERT(JS_GetFlatStringChars((JSFlatString *)str));
|
|
return (JSFlatString *)str;
|
|
}
|
|
|
|
static MOZ_ALWAYS_INLINE JSString *
|
|
JS_FORGET_STRING_FLATNESS(JSFlatString *fstr)
|
|
{
|
|
return (JSString *)fstr;
|
|
}
|
|
|
|
/*
|
|
* Additional APIs that avoid fallibility when given a flat string.
|
|
*/
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_FlatStringEqualsAscii(JSFlatString *str, const char *asciiBytes);
|
|
|
|
extern JS_PUBLIC_API(size_t)
|
|
JS_PutEscapedFlatString(char *buffer, size_t size, JSFlatString *str, char quote);
|
|
|
|
/*
|
|
* Create a dependent string, i.e., a string that owns no character storage,
|
|
* but that refers to a slice of another string's chars. Dependent strings
|
|
* are mutable by definition, so the thread safety comments above apply.
|
|
*/
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_NewDependentString(JSContext *cx, JS::HandleString str, size_t start,
|
|
size_t length);
|
|
|
|
/*
|
|
* Concatenate two strings, possibly resulting in a rope.
|
|
* See above for thread safety comments.
|
|
*/
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_ConcatStrings(JSContext *cx, JS::HandleString left, JS::HandleString right);
|
|
|
|
/*
|
|
* For JS_DecodeBytes, set *dstlenp to the size of the destination buffer before
|
|
* the call; on return, *dstlenp contains the number of jschars actually stored.
|
|
* To determine the necessary destination buffer size, make a sizing call that
|
|
* passes nullptr for dst.
|
|
*
|
|
* On errors, the functions report the error. In that case, *dstlenp contains
|
|
* the number of characters or bytes transferred so far. If cx is nullptr, no
|
|
* error is reported on failure, and the functions simply return false.
|
|
*
|
|
* NB: This function does not store an additional zero byte or jschar after the
|
|
* transcoded string.
|
|
*/
|
|
JS_PUBLIC_API(bool)
|
|
JS_DecodeBytes(JSContext *cx, const char *src, size_t srclen, jschar *dst,
|
|
size_t *dstlenp);
|
|
|
|
/*
|
|
* A variation on JS_EncodeCharacters where a null terminated string is
|
|
* returned that you are expected to call JS_free on when done.
|
|
*/
|
|
JS_PUBLIC_API(char *)
|
|
JS_EncodeString(JSContext *cx, JSString *str);
|
|
|
|
/*
|
|
* Same behavior as JS_EncodeString(), but encode into UTF-8 string
|
|
*/
|
|
JS_PUBLIC_API(char *)
|
|
JS_EncodeStringToUTF8(JSContext *cx, JS::HandleString str);
|
|
|
|
/*
|
|
* Get number of bytes in the string encoding (without accounting for a
|
|
* terminating zero bytes. The function returns (size_t) -1 if the string
|
|
* can not be encoded into bytes and reports an error using cx accordingly.
|
|
*/
|
|
JS_PUBLIC_API(size_t)
|
|
JS_GetStringEncodingLength(JSContext *cx, JSString *str);
|
|
|
|
/*
|
|
* Encode string into a buffer. The function does not stores an additional
|
|
* zero byte. The function returns (size_t) -1 if the string can not be
|
|
* encoded into bytes with no error reported. Otherwise it returns the number
|
|
* of bytes that are necessary to encode the string. If that exceeds the
|
|
* length parameter, the string will be cut and only length bytes will be
|
|
* written into the buffer.
|
|
*/
|
|
JS_PUBLIC_API(size_t)
|
|
JS_EncodeStringToBuffer(JSContext *cx, JSString *str, char *buffer, size_t length);
|
|
|
|
class JSAutoByteString
|
|
{
|
|
public:
|
|
JSAutoByteString(JSContext *cx, JSString *str
|
|
MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
|
|
: mBytes(JS_EncodeString(cx, str))
|
|
{
|
|
JS_ASSERT(cx);
|
|
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
|
|
}
|
|
|
|
JSAutoByteString(MOZ_GUARD_OBJECT_NOTIFIER_ONLY_PARAM)
|
|
: mBytes(nullptr)
|
|
{
|
|
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
|
|
}
|
|
|
|
~JSAutoByteString() {
|
|
js_free(mBytes);
|
|
}
|
|
|
|
/* Take ownership of the given byte array. */
|
|
void initBytes(char *bytes) {
|
|
JS_ASSERT(!mBytes);
|
|
mBytes = bytes;
|
|
}
|
|
|
|
char *encodeLatin1(JSContext *cx, JSString *str) {
|
|
JS_ASSERT(!mBytes);
|
|
JS_ASSERT(cx);
|
|
mBytes = JS_EncodeString(cx, str);
|
|
return mBytes;
|
|
}
|
|
|
|
char *encodeLatin1(js::ExclusiveContext *cx, JSString *str);
|
|
|
|
char *encodeUtf8(JSContext *cx, JS::HandleString str) {
|
|
JS_ASSERT(!mBytes);
|
|
JS_ASSERT(cx);
|
|
mBytes = JS_EncodeStringToUTF8(cx, str);
|
|
return mBytes;
|
|
}
|
|
|
|
void clear() {
|
|
js_free(mBytes);
|
|
mBytes = nullptr;
|
|
}
|
|
|
|
char *ptr() const {
|
|
return mBytes;
|
|
}
|
|
|
|
bool operator!() const {
|
|
return !mBytes;
|
|
}
|
|
|
|
size_t length() const {
|
|
if (!mBytes)
|
|
return 0;
|
|
return strlen(mBytes);
|
|
}
|
|
|
|
private:
|
|
char *mBytes;
|
|
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
|
|
|
|
/* Copy and assignment are not supported. */
|
|
JSAutoByteString(const JSAutoByteString &another);
|
|
JSAutoByteString &operator=(const JSAutoByteString &another);
|
|
};
|
|
|
|
/************************************************************************/
|
|
/*
|
|
* JSON functions
|
|
*/
|
|
typedef bool (* JSONWriteCallback)(const jschar *buf, uint32_t len, void *data);
|
|
|
|
/*
|
|
* JSON.stringify as specified by ES5.
|
|
*/
|
|
JS_PUBLIC_API(bool)
|
|
JS_Stringify(JSContext *cx, JS::MutableHandleValue value, JS::HandleObject replacer,
|
|
JS::HandleValue space, JSONWriteCallback callback, void *data);
|
|
|
|
/*
|
|
* JSON.parse as specified by ES5.
|
|
*/
|
|
JS_PUBLIC_API(bool)
|
|
JS_ParseJSON(JSContext *cx, const jschar *chars, uint32_t len, JS::MutableHandleValue vp);
|
|
|
|
JS_PUBLIC_API(bool)
|
|
JS_ParseJSONWithReviver(JSContext *cx, const jschar *chars, uint32_t len, JS::HandleValue reviver,
|
|
JS::MutableHandleValue vp);
|
|
|
|
/************************************************************************/
|
|
|
|
/*
|
|
* The default locale for the ECMAScript Internationalization API
|
|
* (Intl.Collator, Intl.NumberFormat, Intl.DateTimeFormat).
|
|
* Note that the Internationalization API encourages clients to
|
|
* specify their own locales.
|
|
* The locale string remains owned by the caller.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_SetDefaultLocale(JSRuntime *rt, const char *locale);
|
|
|
|
/*
|
|
* Reset the default locale to OS defaults.
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
JS_ResetDefaultLocale(JSRuntime *rt);
|
|
|
|
/*
|
|
* Locale specific string conversion and error message callbacks.
|
|
*/
|
|
struct JSLocaleCallbacks {
|
|
JSLocaleToUpperCase localeToUpperCase;
|
|
JSLocaleToLowerCase localeToLowerCase;
|
|
JSLocaleCompare localeCompare; // not used #if EXPOSE_INTL_API
|
|
JSLocaleToUnicode localeToUnicode;
|
|
JSErrorCallback localeGetErrorMessage;
|
|
};
|
|
|
|
/*
|
|
* Establish locale callbacks. The pointer must persist as long as the
|
|
* JSRuntime. Passing nullptr restores the default behaviour.
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetLocaleCallbacks(JSRuntime *rt, JSLocaleCallbacks *callbacks);
|
|
|
|
/*
|
|
* Return the address of the current locale callbacks struct, which may
|
|
* be nullptr.
|
|
*/
|
|
extern JS_PUBLIC_API(JSLocaleCallbacks *)
|
|
JS_GetLocaleCallbacks(JSRuntime *rt);
|
|
|
|
/************************************************************************/
|
|
|
|
/*
|
|
* Error reporting.
|
|
*/
|
|
|
|
/*
|
|
* Report an exception represented by the sprintf-like conversion of format
|
|
* and its arguments. This exception message string is passed to a pre-set
|
|
* JSErrorReporter function (set by JS_SetErrorReporter).
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
JS_ReportError(JSContext *cx, const char *format, ...);
|
|
|
|
/*
|
|
* Use an errorNumber to retrieve the format string, args are char *
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
JS_ReportErrorNumber(JSContext *cx, JSErrorCallback errorCallback,
|
|
void *userRef, const unsigned errorNumber, ...);
|
|
|
|
#ifdef va_start
|
|
extern JS_PUBLIC_API(void)
|
|
JS_ReportErrorNumberVA(JSContext *cx, JSErrorCallback errorCallback,
|
|
void *userRef, const unsigned errorNumber, va_list ap);
|
|
#endif
|
|
|
|
/*
|
|
* Use an errorNumber to retrieve the format string, args are jschar *
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
JS_ReportErrorNumberUC(JSContext *cx, JSErrorCallback errorCallback,
|
|
void *userRef, const unsigned errorNumber, ...);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_ReportErrorNumberUCArray(JSContext *cx, JSErrorCallback errorCallback,
|
|
void *userRef, const unsigned errorNumber,
|
|
const jschar **args);
|
|
|
|
/*
|
|
* As above, but report a warning instead (JSREPORT_IS_WARNING(report.flags)).
|
|
* Return true if there was no error trying to issue the warning, and if the
|
|
* warning was not converted into an error due to the JSOPTION_WERROR option
|
|
* being set, false otherwise.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ReportWarning(JSContext *cx, const char *format, ...);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ReportErrorFlagsAndNumber(JSContext *cx, unsigned flags,
|
|
JSErrorCallback errorCallback, void *userRef,
|
|
const unsigned errorNumber, ...);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ReportErrorFlagsAndNumberUC(JSContext *cx, unsigned flags,
|
|
JSErrorCallback errorCallback, void *userRef,
|
|
const unsigned errorNumber, ...);
|
|
|
|
/*
|
|
* Complain when out of memory.
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
JS_ReportOutOfMemory(JSContext *cx);
|
|
|
|
/*
|
|
* Complain when an allocation size overflows the maximum supported limit.
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
JS_ReportAllocationOverflow(JSContext *cx);
|
|
|
|
struct JSErrorReport {
|
|
const char *filename; /* source file name, URL, etc., or null */
|
|
JSPrincipals *originPrincipals; /* see 'originPrincipals' comment above */
|
|
unsigned lineno; /* source line number */
|
|
const char *linebuf; /* offending source line without final \n */
|
|
const char *tokenptr; /* pointer to error token in linebuf */
|
|
const jschar *uclinebuf; /* unicode (original) line buffer */
|
|
const jschar *uctokenptr; /* unicode (original) token pointer */
|
|
unsigned flags; /* error/warning, etc. */
|
|
unsigned errorNumber; /* the error number, e.g. see js.msg */
|
|
const jschar *ucmessage; /* the (default) error message */
|
|
const jschar **messageArgs; /* arguments for the error message */
|
|
int16_t exnType; /* One of the JSExnType constants */
|
|
unsigned column; /* zero-based column index in line */
|
|
};
|
|
|
|
/*
|
|
* JSErrorReport flag values. These may be freely composed.
|
|
*/
|
|
#define JSREPORT_ERROR 0x0 /* pseudo-flag for default case */
|
|
#define JSREPORT_WARNING 0x1 /* reported via JS_ReportWarning */
|
|
#define JSREPORT_EXCEPTION 0x2 /* exception was thrown */
|
|
#define JSREPORT_STRICT 0x4 /* error or warning due to strict option */
|
|
|
|
/*
|
|
* This condition is an error in strict mode code, a warning if
|
|
* JS_HAS_STRICT_OPTION(cx), and otherwise should not be reported at
|
|
* all. We check the strictness of the context's top frame's script;
|
|
* where that isn't appropriate, the caller should do the right checks
|
|
* itself instead of using this flag.
|
|
*/
|
|
#define JSREPORT_STRICT_MODE_ERROR 0x8
|
|
|
|
/*
|
|
* If JSREPORT_EXCEPTION is set, then a JavaScript-catchable exception
|
|
* has been thrown for this runtime error, and the host should ignore it.
|
|
* Exception-aware hosts should also check for JS_IsExceptionPending if
|
|
* JS_ExecuteScript returns failure, and signal or propagate the exception, as
|
|
* appropriate.
|
|
*/
|
|
#define JSREPORT_IS_WARNING(flags) (((flags) & JSREPORT_WARNING) != 0)
|
|
#define JSREPORT_IS_EXCEPTION(flags) (((flags) & JSREPORT_EXCEPTION) != 0)
|
|
#define JSREPORT_IS_STRICT(flags) (((flags) & JSREPORT_STRICT) != 0)
|
|
#define JSREPORT_IS_STRICT_MODE_ERROR(flags) (((flags) & \
|
|
JSREPORT_STRICT_MODE_ERROR) != 0)
|
|
extern JS_PUBLIC_API(JSErrorReporter)
|
|
JS_GetErrorReporter(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(JSErrorReporter)
|
|
JS_SetErrorReporter(JSContext *cx, JSErrorReporter er);
|
|
|
|
namespace JS {
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
CreateTypeError(JSContext *cx, HandleString stack, HandleString fileName,
|
|
uint32_t lineNumber, uint32_t columnNumber, JSErrorReport *report,
|
|
HandleString message, MutableHandleValue rval);
|
|
|
|
/************************************************************************/
|
|
|
|
/*
|
|
* Weak Maps.
|
|
*/
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
NewWeakMapObject(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
IsWeakMapObject(JSObject *obj);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
GetWeakMapEntry(JSContext *cx, JS::HandleObject mapObj, JS::HandleObject key,
|
|
JS::MutableHandleValue val);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
SetWeakMapEntry(JSContext *cx, JS::HandleObject mapObj, JS::HandleObject key,
|
|
JS::HandleValue val);
|
|
|
|
} /* namespace JS */
|
|
|
|
/*
|
|
* Dates.
|
|
*/
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_NewDateObject(JSContext *cx, int year, int mon, int mday, int hour, int min, int sec);
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_NewDateObjectMsec(JSContext *cx, double msec);
|
|
|
|
/*
|
|
* Infallible predicate to test whether obj is a date object.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ObjectIsDate(JSContext *cx, JS::HandleObject obj);
|
|
|
|
/*
|
|
* Clears the cache of calculated local time from each Date object.
|
|
* Call to propagate a system timezone change.
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
JS_ClearDateCaches(JSContext *cx);
|
|
|
|
/************************************************************************/
|
|
|
|
/*
|
|
* Regular Expressions.
|
|
*/
|
|
#define JSREG_FOLD 0x01 /* fold uppercase to lowercase */
|
|
#define JSREG_GLOB 0x02 /* global exec, creates array of matches */
|
|
#define JSREG_MULTILINE 0x04 /* treat ^ and $ as begin and end of line */
|
|
#define JSREG_STICKY 0x08 /* only match starting at lastIndex */
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_NewRegExpObject(JSContext *cx, JS::HandleObject obj, char *bytes, size_t length,
|
|
unsigned flags);
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_NewUCRegExpObject(JSContext *cx, JS::HandleObject obj, jschar *chars, size_t length,
|
|
unsigned flags);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetRegExpInput(JSContext *cx, JS::HandleObject obj, JS::HandleString input,
|
|
bool multiline);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_ClearRegExpStatics(JSContext *cx, JS::HandleObject obj);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ExecuteRegExp(JSContext *cx, JS::HandleObject obj, JS::HandleObject reobj,
|
|
jschar *chars, size_t length, size_t *indexp, bool test,
|
|
JS::MutableHandleValue rval);
|
|
|
|
/* RegExp interface for clients without a global object. */
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_NewRegExpObjectNoStatics(JSContext *cx, char *bytes, size_t length, unsigned flags);
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_NewUCRegExpObjectNoStatics(JSContext *cx, jschar *chars, size_t length, unsigned flags);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ExecuteRegExpNoStatics(JSContext *cx, JS::HandleObject reobj, jschar *chars, size_t length,
|
|
size_t *indexp, bool test, JS::MutableHandleValue rval);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ObjectIsRegExp(JSContext *cx, JS::HandleObject obj);
|
|
|
|
extern JS_PUBLIC_API(unsigned)
|
|
JS_GetRegExpFlags(JSContext *cx, JS::HandleObject obj);
|
|
|
|
extern JS_PUBLIC_API(JSString *)
|
|
JS_GetRegExpSource(JSContext *cx, JS::HandleObject obj);
|
|
|
|
/************************************************************************/
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IsExceptionPending(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_GetPendingException(JSContext *cx, JS::MutableHandleValue vp);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetPendingException(JSContext *cx, JS::HandleValue v);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_ClearPendingException(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ReportPendingException(JSContext *cx);
|
|
|
|
namespace JS {
|
|
|
|
/*
|
|
* Save and later restore the current exception state of a given JSContext.
|
|
* This is useful for implementing behavior in C++ that's like try/catch
|
|
* or try/finally in JS.
|
|
*
|
|
* Typical usage:
|
|
*
|
|
* bool ok = JS_EvaluateScript(cx, ...);
|
|
* AutoSaveExceptionState savedExc(cx);
|
|
* ... cleanup that might re-enter JS ...
|
|
* return ok;
|
|
*/
|
|
class JS_PUBLIC_API(AutoSaveExceptionState)
|
|
{
|
|
private:
|
|
JSContext *context;
|
|
bool wasThrowing;
|
|
RootedValue exceptionValue;
|
|
|
|
public:
|
|
/*
|
|
* Take a snapshot of cx's current exception state. Then clear any current
|
|
* pending exception in cx.
|
|
*/
|
|
explicit AutoSaveExceptionState(JSContext *cx);
|
|
|
|
/*
|
|
* If neither drop() nor restore() was called, restore the exception
|
|
* state only if no exception is currently pending on cx.
|
|
*/
|
|
~AutoSaveExceptionState();
|
|
|
|
/*
|
|
* Discard any stored exception state.
|
|
* If this is called, the destructor is a no-op.
|
|
*/
|
|
void drop() {
|
|
wasThrowing = false;
|
|
exceptionValue.setUndefined();
|
|
}
|
|
|
|
/*
|
|
* Replace cx's exception state with the stored exception state. Then
|
|
* discard the stored exception state. If this is called, the
|
|
* destructor is a no-op.
|
|
*/
|
|
void restore();
|
|
};
|
|
|
|
} /* namespace JS */
|
|
|
|
/* Deprecated API. Use AutoSaveExceptionState instead. */
|
|
extern JS_PUBLIC_API(JSExceptionState *)
|
|
JS_SaveExceptionState(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_RestoreExceptionState(JSContext *cx, JSExceptionState *state);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_DropExceptionState(JSContext *cx, JSExceptionState *state);
|
|
|
|
/*
|
|
* If the given object is an exception object, the exception will have (or be
|
|
* able to lazily create) an error report struct, and this function will return
|
|
* the address of that struct. Otherwise, it returns nullptr. The lifetime
|
|
* of the error report struct that might be returned is the same as the
|
|
* lifetime of the exception object.
|
|
*/
|
|
extern JS_PUBLIC_API(JSErrorReport *)
|
|
JS_ErrorFromException(JSContext *cx, JS::HandleObject obj);
|
|
|
|
/*
|
|
* Throws a StopIteration exception on cx.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_ThrowStopIteration(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IsStopIteration(jsval v);
|
|
|
|
extern JS_PUBLIC_API(intptr_t)
|
|
JS_GetCurrentThread();
|
|
|
|
/*
|
|
* A JS runtime always has an "owner thread". The owner thread is set when the
|
|
* runtime is created (to the current thread) and practically all entry points
|
|
* into the JS engine check that a runtime (or anything contained in the
|
|
* runtime: context, compartment, object, etc) is only touched by its owner
|
|
* thread. Embeddings may check this invariant outside the JS engine by calling
|
|
* JS_AbortIfWrongThread (which will abort if not on the owner thread, even for
|
|
* non-debug builds).
|
|
*/
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_AbortIfWrongThread(JSRuntime *rt);
|
|
|
|
/************************************************************************/
|
|
|
|
/*
|
|
* A constructor can request that the JS engine create a default new 'this'
|
|
* object of the given class, using the callee to determine parentage and
|
|
* [[Prototype]].
|
|
*/
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_NewObjectForConstructor(JSContext *cx, const JSClass *clasp, const JS::CallArgs& args);
|
|
|
|
/************************************************************************/
|
|
|
|
#ifdef JS_GC_ZEAL
|
|
#define JS_DEFAULT_ZEAL_FREQ 100
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetGCZeal(JSContext *cx, uint8_t zeal, uint32_t frequency);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_ScheduleGC(JSContext *cx, uint32_t count);
|
|
#endif
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetParallelParsingEnabled(JSRuntime *rt, bool enabled);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetParallelIonCompilationEnabled(JSRuntime *rt, bool enabled);
|
|
|
|
#define JIT_COMPILER_OPTIONS(Register) \
|
|
Register(BASELINE_USECOUNT_TRIGGER, "baseline.usecount.trigger") \
|
|
Register(ION_USECOUNT_TRIGGER, "ion.usecount.trigger") \
|
|
Register(ION_ENABLE, "ion.enable") \
|
|
Register(BASELINE_ENABLE, "baseline.enable") \
|
|
Register(PARALLEL_COMPILATION_ENABLE, "parallel-compilation.enable")
|
|
|
|
typedef enum JSJitCompilerOption {
|
|
#define JIT_COMPILER_DECLARE(key, str) \
|
|
JSJITCOMPILER_ ## key,
|
|
|
|
JIT_COMPILER_OPTIONS(JIT_COMPILER_DECLARE)
|
|
#undef JIT_COMPILER_DECLARE
|
|
|
|
JSJITCOMPILER_NOT_AN_OPTION
|
|
} JSJitCompilerOption;
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
JS_SetGlobalJitCompilerOption(JSRuntime *rt, JSJitCompilerOption opt, uint32_t value);
|
|
extern JS_PUBLIC_API(int)
|
|
JS_GetGlobalJitCompilerOption(JSRuntime *rt, JSJitCompilerOption opt);
|
|
|
|
/*
|
|
* Convert a uint32_t index into a jsid.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IndexToId(JSContext *cx, uint32_t index, JS::MutableHandleId);
|
|
|
|
/*
|
|
* Convert chars into a jsid.
|
|
*
|
|
* |chars| may not be an index.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_CharsToId(JSContext* cx, JS::TwoByteChars chars, JS::MutableHandleId);
|
|
|
|
/*
|
|
* Test if the given string is a valid ECMAScript identifier
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
JS_IsIdentifier(JSContext *cx, JS::HandleString str, bool *isIdentifier);
|
|
|
|
namespace JS {
|
|
|
|
/*
|
|
* AutoFilename encapsulates a pointer to a C-string and keeps the C-string
|
|
* alive for as long as the associated AutoFilename object is alive.
|
|
*/
|
|
class MOZ_STACK_CLASS JS_PUBLIC_API(AutoFilename)
|
|
{
|
|
void *scriptSource_;
|
|
|
|
AutoFilename(const AutoFilename &) MOZ_DELETE;
|
|
void operator=(const AutoFilename &) MOZ_DELETE;
|
|
|
|
public:
|
|
AutoFilename() : scriptSource_(nullptr) {}
|
|
~AutoFilename() { reset(nullptr); }
|
|
|
|
const char *get() const;
|
|
|
|
void reset(void *newScriptSource);
|
|
};
|
|
|
|
/*
|
|
* Return the current filename and line number of the most currently running
|
|
* frame. Returns true if a scripted frame was found, false otherwise.
|
|
*
|
|
* If a the embedding has hidden the scripted caller for the topmost activation
|
|
* record, this will also return false.
|
|
*/
|
|
extern JS_PUBLIC_API(bool)
|
|
DescribeScriptedCaller(JSContext *cx, AutoFilename *filename = nullptr,
|
|
unsigned *lineno = nullptr);
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
GetScriptedCallerGlobal(JSContext *cx);
|
|
|
|
/*
|
|
* Informs the JS engine that the scripted caller should be hidden. This can be
|
|
* used by the embedding to maintain an override of the scripted caller in its
|
|
* calculations, by hiding the scripted caller in the JS engine and pushing data
|
|
* onto a separate stack, which it inspects when DescribeScriptedCaller returns
|
|
* null.
|
|
*
|
|
* We maintain a counter on each activation record. Add() increments the counter
|
|
* of the topmost activation, and Remove() decrements it. The count may never
|
|
* drop below zero, and must always be exactly zero when the activation is
|
|
* popped from the stack.
|
|
*/
|
|
extern JS_PUBLIC_API(void)
|
|
HideScriptedCaller(JSContext *cx);
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
UnhideScriptedCaller(JSContext *cx);
|
|
|
|
class AutoHideScriptedCaller
|
|
{
|
|
public:
|
|
AutoHideScriptedCaller(JSContext *cx
|
|
MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
|
|
: mContext(cx)
|
|
{
|
|
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
|
|
HideScriptedCaller(mContext);
|
|
}
|
|
~AutoHideScriptedCaller() {
|
|
UnhideScriptedCaller(mContext);
|
|
}
|
|
|
|
protected:
|
|
JSContext *mContext;
|
|
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
|
|
};
|
|
|
|
} /* namespace JS */
|
|
|
|
/*
|
|
* Encode/Decode interpreted scripts and functions to/from memory.
|
|
*/
|
|
|
|
extern JS_PUBLIC_API(void *)
|
|
JS_EncodeScript(JSContext *cx, JS::HandleScript script, uint32_t *lengthp);
|
|
|
|
extern JS_PUBLIC_API(void *)
|
|
JS_EncodeInterpretedFunction(JSContext *cx, JS::HandleObject funobj, uint32_t *lengthp);
|
|
|
|
extern JS_PUBLIC_API(JSScript *)
|
|
JS_DecodeScript(JSContext *cx, const void *data, uint32_t length, JSPrincipals *originPrincipals);
|
|
|
|
extern JS_PUBLIC_API(JSObject *)
|
|
JS_DecodeInterpretedFunction(JSContext *cx, const void *data, uint32_t length,
|
|
JSPrincipals *originPrincipals);
|
|
|
|
namespace JS {
|
|
|
|
/*
|
|
* This callback represents a request by the JS engine to open for reading the
|
|
* existing cache entry for the given global and char range that may contain a
|
|
* module. If a cache entry exists, the callback shall return 'true' and return
|
|
* the size, base address and an opaque file handle as outparams. If the
|
|
* callback returns 'true', the JS engine guarantees a call to
|
|
* CloseAsmJSCacheEntryForReadOp, passing the same base address, size and
|
|
* handle.
|
|
*/
|
|
typedef bool
|
|
(* OpenAsmJSCacheEntryForReadOp)(HandleObject global, const jschar *begin, const jschar *limit,
|
|
size_t *size, const uint8_t **memory, intptr_t *handle);
|
|
typedef void
|
|
(* CloseAsmJSCacheEntryForReadOp)(HandleObject global, size_t size, const uint8_t *memory,
|
|
intptr_t handle);
|
|
|
|
/*
|
|
* This callback represents a request by the JS engine to open for writing a
|
|
* cache entry of the given size for the given global and char range containing
|
|
* the just-compiled module. If cache entry space is available, the callback
|
|
* shall return 'true' and return the base address and an opaque file handle as
|
|
* outparams. If the callback returns 'true', the JS engine guarantees a call
|
|
* to CloseAsmJSCacheEntryForWriteOp passing the same base address, size and
|
|
* handle.
|
|
*
|
|
* If 'installed' is true, then the cache entry is associated with a permanently
|
|
* installed JS file (e.g., in a packaged webapp). This information allows the
|
|
* embedding to store the cache entry in a installed location associated with
|
|
* the principal of 'global' where it will not be evicted until the associated
|
|
* installed JS file is removed.
|
|
*/
|
|
typedef bool
|
|
(* OpenAsmJSCacheEntryForWriteOp)(HandleObject global, bool installed,
|
|
const jschar *begin, const jschar *end,
|
|
size_t size, uint8_t **memory, intptr_t *handle);
|
|
typedef void
|
|
(* CloseAsmJSCacheEntryForWriteOp)(HandleObject global, size_t size, uint8_t *memory,
|
|
intptr_t handle);
|
|
|
|
typedef js::Vector<char, 0, js::SystemAllocPolicy> BuildIdCharVector;
|
|
|
|
// Return the buildId (represented as a sequence of characters) associated with
|
|
// the currently-executing build. If the JS engine is embedded such that a
|
|
// single cache entry can be observed by different compiled versions of the JS
|
|
// engine, it is critical that the buildId shall change for each new build of
|
|
// the JS engine.
|
|
|
|
typedef bool
|
|
(* BuildIdOp)(BuildIdCharVector *buildId);
|
|
|
|
struct AsmJSCacheOps
|
|
{
|
|
OpenAsmJSCacheEntryForReadOp openEntryForRead;
|
|
CloseAsmJSCacheEntryForReadOp closeEntryForRead;
|
|
OpenAsmJSCacheEntryForWriteOp openEntryForWrite;
|
|
CloseAsmJSCacheEntryForWriteOp closeEntryForWrite;
|
|
BuildIdOp buildId;
|
|
};
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
SetAsmJSCacheOps(JSRuntime *rt, const AsmJSCacheOps *callbacks);
|
|
|
|
/*
|
|
* Convenience class for imitating a JS level for-of loop. Typical usage:
|
|
*
|
|
* ForOfIterator it(cx);
|
|
* if (!it.init(iterable))
|
|
* return false;
|
|
* RootedValue val(cx);
|
|
* while (true) {
|
|
* bool done;
|
|
* if (!it.next(&val, &done))
|
|
* return false;
|
|
* if (done)
|
|
* break;
|
|
* if (!DoStuff(cx, val))
|
|
* return false;
|
|
* }
|
|
*/
|
|
class MOZ_STACK_CLASS JS_PUBLIC_API(ForOfIterator) {
|
|
protected:
|
|
JSContext *cx_;
|
|
/*
|
|
* Use the ForOfPIC on the global object (see vm/GlobalObject.h) to try
|
|
* to optimize iteration across arrays.
|
|
*
|
|
* Case 1: Regular Iteration
|
|
* iterator - pointer to the iterator object.
|
|
* index - fixed to NOT_ARRAY (== UINT32_MAX)
|
|
*
|
|
* Case 2: Optimized Array Iteration
|
|
* iterator - pointer to the array object.
|
|
* index - current position in array.
|
|
*
|
|
* The cases are distinguished by whether or not |index| is equal to NOT_ARRAY.
|
|
*/
|
|
JS::RootedObject iterator;
|
|
uint32_t index;
|
|
|
|
static const uint32_t NOT_ARRAY = UINT32_MAX;
|
|
|
|
ForOfIterator(const ForOfIterator &) MOZ_DELETE;
|
|
ForOfIterator &operator=(const ForOfIterator &) MOZ_DELETE;
|
|
|
|
public:
|
|
ForOfIterator(JSContext *cx) : cx_(cx), iterator(cx_), index(NOT_ARRAY) { }
|
|
|
|
enum NonIterableBehavior {
|
|
ThrowOnNonIterable,
|
|
AllowNonIterable
|
|
};
|
|
|
|
/*
|
|
* Initialize the iterator. If AllowNonIterable is passed then if iterable
|
|
* does not have a callable @@iterator init() will just return true instead
|
|
* of throwing. Callers should then check valueIsIterable() before
|
|
* continuing with the iteration.
|
|
*/
|
|
bool init(JS::HandleValue iterable,
|
|
NonIterableBehavior nonIterableBehavior = ThrowOnNonIterable);
|
|
|
|
/*
|
|
* Get the next value from the iterator. If false *done is true
|
|
* after this call, do not examine val.
|
|
*/
|
|
bool next(JS::MutableHandleValue val, bool *done);
|
|
|
|
/*
|
|
* If initialized with throwOnNonCallable = false, check whether
|
|
* the value is iterable.
|
|
*/
|
|
bool valueIsIterable() const {
|
|
return iterator;
|
|
}
|
|
|
|
private:
|
|
inline bool nextFromOptimizedArray(MutableHandleValue val, bool *done);
|
|
bool materializeArrayIterator();
|
|
};
|
|
|
|
|
|
/*
|
|
* If a large allocation fails, the JS engine may call the large-allocation-
|
|
* failure callback, if set, to allow the embedding to flush caches, possibly
|
|
* perform shrinking GCs, etc. to make some room so that the allocation will
|
|
* succeed if retried. After the callback returns, the JS engine will try to
|
|
* allocate again and may be succesful.
|
|
*/
|
|
|
|
typedef void
|
|
(* LargeAllocationFailureCallback)();
|
|
|
|
extern JS_PUBLIC_API(void)
|
|
SetLargeAllocationFailureCallback(JSRuntime *rt, LargeAllocationFailureCallback afc);
|
|
|
|
/*
|
|
* Unlike the error reporter, which is only called if the exception for an OOM
|
|
* bubbles up and is not caught, the OutOfMemoryCallback is called immediately
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* at the OOM site to allow the embedding to capture the current state of heap
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* allocation before anything is freed. If the large-allocation-failure callback
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* is called at all (not all allocation sites call the large-allocation-failure
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* callback on failure), it is called before the out-of-memory callback; the
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* out-of-memory callback is only called if the allocation still fails after the
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* large-allocation-failure callback has returned.
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*/
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typedef void
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(* OutOfMemoryCallback)(JSContext *cx);
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extern JS_PUBLIC_API(void)
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SetOutOfMemoryCallback(JSRuntime *rt, OutOfMemoryCallback cb);
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} /* namespace JS */
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#endif /* jsapi_h */
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