mirror of
https://github.com/mozilla/gecko-dev.git
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422 lines
11 KiB
C
422 lines
11 KiB
C
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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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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/*
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* JavaScript Debugging support - 'High Level' functions
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*/
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#include "jsd.h"
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/***************************************************************************/
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/* XXX not 'static' because of old Mac CodeWarrior bug */
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JSCList _jsd_context_list = JS_INIT_STATIC_CLIST(&_jsd_context_list);
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/* these are used to connect JSD_SetUserCallbacks() with JSD_DebuggerOn() */
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static JSD_UserCallbacks _callbacks;
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static void* _user = NULL;
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static JSRuntime* _jsrt = NULL;
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#ifdef JSD_HAS_DANGEROUS_THREAD
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static void* _dangerousThread = NULL;
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#endif
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#ifdef JSD_THREADSAFE
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void* _jsd_global_lock = NULL;
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#endif
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#ifdef DEBUG
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void JSD_ASSERT_VALID_CONTEXT(JSDContext* jsdc)
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{
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JS_ASSERT(jsdc->inited);
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JS_ASSERT(jsdc->jsrt);
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JS_ASSERT(jsdc->dumbContext);
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JS_ASSERT(jsdc->glob);
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}
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#endif
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static JSClass global_class = {
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"JSDGlobal", JSCLASS_GLOBAL_FLAGS,
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JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_StrictPropertyStub,
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JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub
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};
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static JSBool
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_validateUserCallbacks(JSD_UserCallbacks* callbacks)
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{
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return !callbacks ||
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(callbacks->size && callbacks->size <= sizeof(JSD_UserCallbacks));
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}
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static JSDContext*
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_newJSDContext(JSRuntime* jsrt,
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JSD_UserCallbacks* callbacks,
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void* user,
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JSObject* scopeobj)
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{
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JSDContext* jsdc = NULL;
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JSCrossCompartmentCall *call = NULL;
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JSBool ok;
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if( ! jsrt )
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return NULL;
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if( ! _validateUserCallbacks(callbacks) )
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return NULL;
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jsdc = (JSDContext*) calloc(1, sizeof(JSDContext));
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if( ! jsdc )
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goto label_newJSDContext_failure;
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if( ! JSD_INIT_LOCKS(jsdc) )
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goto label_newJSDContext_failure;
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JS_INIT_CLIST(&jsdc->links);
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jsdc->jsrt = jsrt;
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if( callbacks )
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memcpy(&jsdc->userCallbacks, callbacks, callbacks->size);
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jsdc->user = user;
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#ifdef JSD_HAS_DANGEROUS_THREAD
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jsdc->dangerousThread = _dangerousThread;
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#endif
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JS_INIT_CLIST(&jsdc->threadsStates);
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JS_INIT_CLIST(&jsdc->sources);
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JS_INIT_CLIST(&jsdc->removedSources);
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jsdc->sourceAlterCount = 1;
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if( ! jsd_CreateAtomTable(jsdc) )
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goto label_newJSDContext_failure;
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if( ! jsd_InitObjectManager(jsdc) )
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goto label_newJSDContext_failure;
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if( ! jsd_InitScriptManager(jsdc) )
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goto label_newJSDContext_failure;
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jsdc->dumbContext = JS_NewContext(jsdc->jsrt, 256);
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if( ! jsdc->dumbContext )
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goto label_newJSDContext_failure;
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JS_BeginRequest(jsdc->dumbContext);
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JS_SetOptions(jsdc->dumbContext, JS_GetOptions(jsdc->dumbContext));
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jsdc->glob = JS_NewCompartmentAndGlobalObject(jsdc->dumbContext, &global_class, NULL);
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if( ! jsdc->glob )
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goto label_newJSDContext_failure;
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call = JS_EnterCrossCompartmentCall(jsdc->dumbContext, jsdc->glob);
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if( ! call )
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goto label_newJSDContext_failure;
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if ( ! JS_AddNamedObjectRoot(jsdc->dumbContext, &jsdc->glob, "JSD context global") )
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goto label_newJSDContext_failure;
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ok = JS_InitStandardClasses(jsdc->dumbContext, jsdc->glob);
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JS_LeaveCrossCompartmentCall(call);
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if( ! ok )
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goto label_newJSDContext_failure;
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JS_EndRequest(jsdc->dumbContext);
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jsdc->data = NULL;
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jsdc->inited = JS_TRUE;
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JSD_LOCK();
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JS_INSERT_LINK(&jsdc->links, &_jsd_context_list);
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JSD_UNLOCK();
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return jsdc;
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label_newJSDContext_failure:
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if( jsdc ) {
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if ( jsdc->dumbContext && jsdc->glob )
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JS_RemoveObjectRootRT(JS_GetRuntime(jsdc->dumbContext), &jsdc->glob);
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jsd_DestroyObjectManager(jsdc);
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jsd_DestroyAtomTable(jsdc);
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if( jsdc->dumbContext )
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JS_EndRequest(jsdc->dumbContext);
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free(jsdc);
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}
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return NULL;
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}
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static void
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_destroyJSDContext(JSDContext* jsdc)
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{
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JSD_ASSERT_VALID_CONTEXT(jsdc);
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JSD_LOCK();
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JS_REMOVE_LINK(&jsdc->links);
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JSD_UNLOCK();
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if ( jsdc->dumbContext && jsdc->glob ) {
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JS_RemoveObjectRootRT(JS_GetRuntime(jsdc->dumbContext), &jsdc->glob);
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}
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jsd_DestroyObjectManager(jsdc);
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jsd_DestroyAtomTable(jsdc);
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jsdc->inited = JS_FALSE;
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/*
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* We should free jsdc here, but we let it leak in case there are any
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* asynchronous hooks calling into the system using it as a handle
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*
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* XXX we also leak the locks
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*/
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JS_DestroyContext(jsdc->dumbContext);
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jsdc->dumbContext = NULL;
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}
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/***************************************************************************/
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JSDContext*
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jsd_DebuggerOnForUser(JSRuntime* jsrt,
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JSD_UserCallbacks* callbacks,
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void* user,
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JSObject* scopeobj)
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{
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JSDContext* jsdc;
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JSContext* iter = NULL;
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jsdc = _newJSDContext(jsrt, callbacks, user, scopeobj);
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if( ! jsdc )
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return NULL;
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/*
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* Set hooks here. The new/destroy script hooks are on even when
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* the debugger is paused. The destroy hook so we'll clean up
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* internal data structures when scripts are destroyed, and the
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* newscript hook for backwards compatibility for now. We'd like
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* to stop doing that.
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*/
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JS_SetNewScriptHookProc(jsdc->jsrt, jsd_NewScriptHookProc, jsdc);
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JS_SetDestroyScriptHookProc(jsdc->jsrt, jsd_DestroyScriptHookProc, jsdc);
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jsd_DebuggerUnpause(jsdc);
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#ifdef LIVEWIRE
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LWDBG_SetNewScriptHookProc(jsd_NewScriptHookProc, jsdc);
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#endif
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if( jsdc->userCallbacks.setContext )
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jsdc->userCallbacks.setContext(jsdc, jsdc->user);
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return jsdc;
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}
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JSDContext*
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jsd_DebuggerOn(void)
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{
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JS_ASSERT(_jsrt);
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JS_ASSERT(_validateUserCallbacks(&_callbacks));
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return jsd_DebuggerOnForUser(_jsrt, &_callbacks, _user, NULL);
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}
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void
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jsd_DebuggerOff(JSDContext* jsdc)
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{
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jsd_DebuggerPause(jsdc, JS_TRUE);
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/* clear hooks here */
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JS_SetNewScriptHookProc(jsdc->jsrt, NULL, NULL);
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JS_SetDestroyScriptHookProc(jsdc->jsrt, NULL, NULL);
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#ifdef LIVEWIRE
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LWDBG_SetNewScriptHookProc(NULL,NULL);
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#endif
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/* clean up */
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JSD_LockScriptSubsystem(jsdc);
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jsd_DestroyScriptManager(jsdc);
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JSD_UnlockScriptSubsystem(jsdc);
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jsd_DestroyAllSources(jsdc);
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_destroyJSDContext(jsdc);
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if( jsdc->userCallbacks.setContext )
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jsdc->userCallbacks.setContext(NULL, jsdc->user);
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}
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void
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jsd_DebuggerPause(JSDContext* jsdc, JSBool forceAllHooksOff)
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{
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JS_SetDebuggerHandler(jsdc->jsrt, NULL, NULL);
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if (forceAllHooksOff || !(jsdc->flags & JSD_COLLECT_PROFILE_DATA)) {
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JS_SetExecuteHook(jsdc->jsrt, NULL, NULL);
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JS_SetCallHook(jsdc->jsrt, NULL, NULL);
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}
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JS_SetThrowHook(jsdc->jsrt, NULL, NULL);
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JS_SetDebugErrorHook(jsdc->jsrt, NULL, NULL);
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}
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static JSBool
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jsd_DebugErrorHook(JSContext *cx, const char *message,
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JSErrorReport *report, void *closure);
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void
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jsd_DebuggerUnpause(JSDContext* jsdc)
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{
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JS_SetDebuggerHandler(jsdc->jsrt, jsd_DebuggerHandler, jsdc);
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JS_SetExecuteHook(jsdc->jsrt, jsd_TopLevelCallHook, jsdc);
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JS_SetCallHook(jsdc->jsrt, jsd_FunctionCallHook, jsdc);
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JS_SetThrowHook(jsdc->jsrt, jsd_ThrowHandler, jsdc);
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JS_SetDebugErrorHook(jsdc->jsrt, jsd_DebugErrorHook, jsdc);
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}
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void
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jsd_SetUserCallbacks(JSRuntime* jsrt, JSD_UserCallbacks* callbacks, void* user)
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{
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_jsrt = jsrt;
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_user = user;
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#ifdef JSD_HAS_DANGEROUS_THREAD
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_dangerousThread = JSD_CURRENT_THREAD();
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#endif
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if( callbacks )
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memcpy(&_callbacks, callbacks, sizeof(JSD_UserCallbacks));
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else
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memset(&_callbacks, 0 , sizeof(JSD_UserCallbacks));
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}
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void*
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jsd_SetContextPrivate(JSDContext* jsdc, void *data)
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{
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void *rval = jsdc->data;
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jsdc->data = data;
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return data;
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}
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void*
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jsd_GetContextPrivate(JSDContext* jsdc)
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{
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return jsdc->data;
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}
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void
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jsd_ClearAllProfileData(JSDContext* jsdc)
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{
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JSDScript *current;
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JSD_LOCK_SCRIPTS(jsdc);
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current = (JSDScript *)jsdc->scripts.next;
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while (current != (JSDScript *)&jsdc->scripts)
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{
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jsd_ClearScriptProfileData(jsdc, current);
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current = (JSDScript *)current->links.next;
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}
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JSD_UNLOCK_SCRIPTS(jsdc);
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}
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JSDContext*
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jsd_JSDContextForJSContext(JSContext* context)
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{
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JSDContext* iter;
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JSDContext* jsdc = NULL;
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JSRuntime* runtime = JS_GetRuntime(context);
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JSD_LOCK();
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for( iter = (JSDContext*)_jsd_context_list.next;
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iter != (JSDContext*)&_jsd_context_list;
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iter = (JSDContext*)iter->links.next )
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{
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if( runtime == iter->jsrt )
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{
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jsdc = iter;
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break;
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}
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}
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JSD_UNLOCK();
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return jsdc;
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}
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static JSBool
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jsd_DebugErrorHook(JSContext *cx, const char *message,
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JSErrorReport *report, void *closure)
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{
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JSDContext* jsdc = (JSDContext*) closure;
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JSD_ErrorReporter errorReporter;
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void* errorReporterData;
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if( ! jsdc )
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{
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JS_ASSERT(0);
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return JS_TRUE;
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}
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if( JSD_IS_DANGEROUS_THREAD(jsdc) )
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return JS_TRUE;
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/* local in case hook gets cleared on another thread */
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JSD_LOCK();
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errorReporter = jsdc->errorReporter;
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errorReporterData = jsdc->errorReporterData;
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JSD_UNLOCK();
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if(!errorReporter)
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return JS_TRUE;
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switch(errorReporter(jsdc, cx, message, report, errorReporterData))
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{
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case JSD_ERROR_REPORTER_PASS_ALONG:
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return JS_TRUE;
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case JSD_ERROR_REPORTER_RETURN:
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return JS_FALSE;
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case JSD_ERROR_REPORTER_DEBUG:
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{
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jsval rval;
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JSD_ExecutionHookProc hook;
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void* hookData;
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/* local in case hook gets cleared on another thread */
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JSD_LOCK();
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hook = jsdc->debugBreakHook;
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hookData = jsdc->debugBreakHookData;
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JSD_UNLOCK();
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jsd_CallExecutionHook(jsdc, cx, JSD_HOOK_DEBUG_REQUESTED,
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hook, hookData, &rval);
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/* XXX Should make this dependent on ExecutionHook retval */
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return JS_TRUE;
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}
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case JSD_ERROR_REPORTER_CLEAR_RETURN:
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if(report && JSREPORT_IS_EXCEPTION(report->flags))
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JS_ClearPendingException(cx);
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return JS_FALSE;
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default:
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JS_ASSERT(0);
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break;
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}
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return JS_TRUE;
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}
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JSBool
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jsd_SetErrorReporter(JSDContext* jsdc,
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JSD_ErrorReporter reporter,
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void* callerdata)
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{
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JSD_LOCK();
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jsdc->errorReporter = reporter;
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jsdc->errorReporterData = callerdata;
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JSD_UNLOCK();
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return JS_TRUE;
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}
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JSBool
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jsd_GetErrorReporter(JSDContext* jsdc,
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JSD_ErrorReporter* reporter,
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void** callerdata)
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{
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JSD_LOCK();
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if( reporter )
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*reporter = jsdc->errorReporter;
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if( callerdata )
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*callerdata = jsdc->errorReporterData;
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JSD_UNLOCK();
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return JS_TRUE;
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}
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