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darling-JavaScriptCore/runtime/Options.cpp
Ariel Abreu ffed2428ed
JavaScriptCore-7608.4.9.1.3
2020-08-29 15:28:47 -04:00

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31 KiB
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/*
* Copyright (C) 2011-2019 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "Options.h"
#include "AssemblerCommon.h"
#include "CPU.h"
#include "LLIntCommon.h"
#include "MinimumReservedZoneSize.h"
#include "SigillCrashAnalyzer.h"
#include <algorithm>
#include <limits>
#include <math.h>
#include <mutex>
#include <stdlib.h>
#include <string.h>
#include <wtf/ASCIICType.h>
#include <wtf/Compiler.h>
#include <wtf/DataLog.h>
#include <wtf/NumberOfCores.h>
#include <wtf/PointerPreparations.h>
#include <wtf/StdLibExtras.h>
#include <wtf/text/StringBuilder.h>
#include <wtf/threads/Signals.h>
#if PLATFORM(COCOA)
#include <crt_externs.h>
#endif
#if ENABLE(JIT)
#include "MacroAssembler.h"
#endif
namespace JSC {
namespace {
#ifdef NDEBUG
bool restrictedOptionsEnabled = false;
#else
bool restrictedOptionsEnabled = true;
#endif
}
void Options::enableRestrictedOptions(bool enableOrNot)
{
restrictedOptionsEnabled = enableOrNot;
}
static bool parse(const char* string, bool& value)
{
if (equalLettersIgnoringASCIICase(string, "true") || equalLettersIgnoringASCIICase(string, "yes") || !strcmp(string, "1")) {
value = true;
return true;
}
if (equalLettersIgnoringASCIICase(string, "false") || equalLettersIgnoringASCIICase(string, "no") || !strcmp(string, "0")) {
value = false;
return true;
}
return false;
}
static bool parse(const char* string, int32_t& value)
{
return sscanf(string, "%d", &value) == 1;
}
static bool parse(const char* string, unsigned& value)
{
return sscanf(string, "%u", &value) == 1;
}
static bool UNUSED_FUNCTION parse(const char* string, unsigned long& value)
{
return sscanf(string, "%lu", &value);
}
static bool UNUSED_FUNCTION parse(const char* string, unsigned long long& value)
{
return sscanf(string, "%llu", &value);
}
static bool parse(const char* string, double& value)
{
return sscanf(string, "%lf", &value) == 1;
}
static bool parse(const char* string, OptionRange& value)
{
return value.init(string);
}
static bool parse(const char* string, const char*& value)
{
if (!strlen(string)) {
value = nullptr;
return true;
}
// FIXME <https://webkit.org/b/169057>: This could leak if this option is set more than once.
// Given that Options are typically used for testing, this isn't considered to be a problem.
value = WTF::fastStrDup(string);
return true;
}
static bool parse(const char* string, GCLogging::Level& value)
{
if (equalLettersIgnoringASCIICase(string, "none") || equalLettersIgnoringASCIICase(string, "no") || equalLettersIgnoringASCIICase(string, "false") || !strcmp(string, "0")) {
value = GCLogging::None;
return true;
}
if (equalLettersIgnoringASCIICase(string, "basic") || equalLettersIgnoringASCIICase(string, "yes") || equalLettersIgnoringASCIICase(string, "true") || !strcmp(string, "1")) {
value = GCLogging::Basic;
return true;
}
if (equalLettersIgnoringASCIICase(string, "verbose") || !strcmp(string, "2")) {
value = GCLogging::Verbose;
return true;
}
return false;
}
bool Options::isAvailable(Options::ID id, Options::Availability availability)
{
if (availability == Availability::Restricted)
return restrictedOptionsEnabled;
ASSERT(availability == Availability::Configurable);
UNUSED_PARAM(id);
#if !defined(NDEBUG)
if (id == maxSingleAllocationSizeID)
return true;
#endif
#if OS(DARWIN)
if (id == useSigillCrashAnalyzerID)
return true;
#endif
#if ENABLE(ASSEMBLER) && OS(LINUX)
if (id == logJITCodeForPerfID)
return true;
#endif
if (id == traceLLIntExecutionID)
return !!LLINT_TRACING;
if (id == traceLLIntSlowPathID)
return !!LLINT_TRACING;
return false;
}
template<typename T>
bool overrideOptionWithHeuristic(T& variable, Options::ID id, const char* name, Options::Availability availability)
{
bool available = (availability == Options::Availability::Normal)
|| Options::isAvailable(id, availability);
const char* stringValue = getenv(name);
if (!stringValue)
return false;
if (available && parse(stringValue, variable))
return true;
fprintf(stderr, "WARNING: failed to parse %s=%s\n", name, stringValue);
return false;
}
bool Options::overrideAliasedOptionWithHeuristic(const char* name)
{
const char* stringValue = getenv(name);
if (!stringValue)
return false;
String aliasedOption;
aliasedOption = String(&name[4]) + "=" + stringValue;
if (Options::setOption(aliasedOption.utf8().data()))
return true;
fprintf(stderr, "WARNING: failed to parse %s=%s\n", name, stringValue);
return false;
}
static unsigned computeNumberOfWorkerThreads(int maxNumberOfWorkerThreads, int minimum = 1)
{
int cpusToUse = std::min(kernTCSMAwareNumberOfProcessorCores(), maxNumberOfWorkerThreads);
// Be paranoid, it is the OS we're dealing with, after all.
ASSERT(cpusToUse >= 1);
return std::max(cpusToUse, minimum);
}
static int32_t computePriorityDeltaOfWorkerThreads(int32_t twoCorePriorityDelta, int32_t multiCorePriorityDelta)
{
if (kernTCSMAwareNumberOfProcessorCores() <= 2)
return twoCorePriorityDelta;
return multiCorePriorityDelta;
}
static bool jitEnabledByDefault()
{
return is32Bit() || isAddress64Bit();
}
static unsigned computeNumberOfGCMarkers(unsigned maxNumberOfGCMarkers)
{
return computeNumberOfWorkerThreads(maxNumberOfGCMarkers);
}
const char* const OptionRange::s_nullRangeStr = "<null>";
bool OptionRange::init(const char* rangeString)
{
// rangeString should be in the form of [!]<low>[:<high>]
// where low and high are unsigned
bool invert = false;
if (!rangeString) {
m_state = InitError;
return false;
}
if (!strcmp(rangeString, s_nullRangeStr)) {
m_state = Uninitialized;
return true;
}
const char* p = rangeString;
if (*p == '!') {
invert = true;
p++;
}
int scanResult = sscanf(p, " %u:%u", &m_lowLimit, &m_highLimit);
if (!scanResult || scanResult == EOF) {
m_state = InitError;
return false;
}
if (scanResult == 1)
m_highLimit = m_lowLimit;
if (m_lowLimit > m_highLimit) {
m_state = InitError;
return false;
}
// FIXME <https://webkit.org/b/169057>: This could leak if this particular option is set more than once.
// Given that these options are used for testing, this isn't considered to be problem.
m_rangeString = WTF::fastStrDup(rangeString);
m_state = invert ? Inverted : Normal;
return true;
}
bool OptionRange::isInRange(unsigned count)
{
if (m_state < Normal)
return true;
if ((m_lowLimit <= count) && (count <= m_highLimit))
return m_state == Normal ? true : false;
return m_state == Normal ? false : true;
}
void OptionRange::dump(PrintStream& out) const
{
out.print(m_rangeString);
}
Options::Entry Options::s_options[Options::numberOfOptions];
Options::Entry Options::s_defaultOptions[Options::numberOfOptions];
// Realize the names for each of the options:
const Options::EntryInfo Options::s_optionsInfo[Options::numberOfOptions] = {
#define FOR_EACH_OPTION(type_, name_, defaultValue_, availability_, description_) \
{ #name_, description_, Options::Type::type_##Type, Availability::availability_ },
JSC_OPTIONS(FOR_EACH_OPTION)
#undef FOR_EACH_OPTION
};
static void scaleJITPolicy()
{
auto& scaleFactor = Options::jitPolicyScale();
if (scaleFactor > 1.0)
scaleFactor = 1.0;
else if (scaleFactor < 0.0)
scaleFactor = 0.0;
struct OptionToScale {
Options::ID id;
int32_t minVal;
};
static const OptionToScale optionsToScale[] = {
{ Options::thresholdForJITAfterWarmUpID, 0 },
{ Options::thresholdForJITSoonID, 0 },
{ Options::thresholdForOptimizeAfterWarmUpID, 1 },
{ Options::thresholdForOptimizeAfterLongWarmUpID, 1 },
{ Options::thresholdForOptimizeSoonID, 1 },
{ Options::thresholdForFTLOptimizeSoonID, 2 },
{ Options::thresholdForFTLOptimizeAfterWarmUpID, 2 }
};
const int numberOfOptionsToScale = sizeof(optionsToScale) / sizeof(OptionToScale);
for (int i = 0; i < numberOfOptionsToScale; i++) {
Option option(optionsToScale[i].id);
ASSERT(option.type() == Options::Type::int32Type);
option.int32Val() *= scaleFactor;
option.int32Val() = std::max(option.int32Val(), optionsToScale[i].minVal);
}
}
static void overrideDefaults()
{
#if !PLATFORM(IOS_FAMILY)
if (WTF::numberOfProcessorCores() < 4)
#endif
{
Options::maximumMutatorUtilization() = 0.6;
Options::concurrentGCMaxHeadroom() = 1.4;
Options::minimumGCPauseMS() = 1;
Options::useStochasticMutatorScheduler() = false;
if (WTF::numberOfProcessorCores() <= 1)
Options::gcIncrementScale() = 1;
else
Options::gcIncrementScale() = 0;
}
#if PLATFORM(IOS_FAMILY)
// On iOS, we control heap growth using process memory footprint. Therefore these values can be agressive.
Options::smallHeapRAMFraction() = 0.8;
Options::mediumHeapRAMFraction() = 0.9;
#if !PLATFORM(WATCHOS) && defined(__LP64__)
Options::useSigillCrashAnalyzer() = true;
#endif
#endif
#if !ENABLE(SIGNAL_BASED_VM_TRAPS)
Options::usePollingTraps() = true;
#endif
#if !ENABLE(WEBASSEMBLY_FAST_MEMORY)
Options::useWebAssemblyFastMemory() = false;
#endif
#if !HAVE(MACH_EXCEPTIONS)
Options::useMachForExceptions() = false;
#endif
}
static void correctOptions()
{
unsigned thresholdForGlobalLexicalBindingEpoch = Options::thresholdForGlobalLexicalBindingEpoch();
if (thresholdForGlobalLexicalBindingEpoch == 0 || thresholdForGlobalLexicalBindingEpoch == 1)
Options::thresholdForGlobalLexicalBindingEpoch() = UINT_MAX;
}
static void recomputeDependentOptions()
{
#if !defined(NDEBUG)
Options::validateDFGExceptionHandling() = true;
#endif
#if !ENABLE(JIT)
Options::useLLInt() = true;
Options::useJIT() = false;
Options::useBaselineJIT() = false;
Options::useDFGJIT() = false;
Options::useFTLJIT() = false;
Options::useDOMJIT() = false;
Options::useRegExpJIT() = false;
#endif
#if !ENABLE(CONCURRENT_JS)
Options::useConcurrentJIT() = false;
#endif
#if !ENABLE(YARR_JIT)
Options::useRegExpJIT() = false;
#endif
#if !ENABLE(DFG_JIT)
Options::useDFGJIT() = false;
Options::useFTLJIT() = false;
#endif
#if !ENABLE(FTL_JIT)
Options::useFTLJIT() = false;
#endif
#if !CPU(X86_64) && !CPU(ARM64)
Options::useConcurrentGC() = false;
#endif
if (!Options::useJIT()) {
Options::useSigillCrashAnalyzer() = false;
Options::useWebAssembly() = false;
}
if (!Options::useWebAssembly())
Options::useFastTLSForWasmContext() = false;
if (Options::dumpDisassembly()
|| Options::dumpDFGDisassembly()
|| Options::dumpFTLDisassembly()
|| Options::dumpBytecodeAtDFGTime()
|| Options::dumpGraphAtEachPhase()
|| Options::dumpDFGGraphAtEachPhase()
|| Options::dumpDFGFTLGraphAtEachPhase()
|| Options::dumpB3GraphAtEachPhase()
|| Options::dumpAirGraphAtEachPhase()
|| Options::verboseCompilation()
|| Options::verboseFTLCompilation()
|| Options::logCompilationChanges()
|| Options::validateGraph()
|| Options::validateGraphAtEachPhase()
|| Options::verboseOSR()
|| Options::verboseCompilationQueue()
|| Options::reportCompileTimes()
|| Options::reportBaselineCompileTimes()
|| Options::reportDFGCompileTimes()
|| Options::reportFTLCompileTimes()
|| Options::logPhaseTimes()
|| Options::verboseCFA()
|| Options::verboseDFGFailure()
|| Options::verboseFTLFailure()
|| Options::dumpRandomizingFuzzerAgentPredictions())
Options::alwaysComputeHash() = true;
if (!Options::useConcurrentGC())
Options::collectContinuously() = false;
if (Option(Options::jitPolicyScaleID).isOverridden())
scaleJITPolicy();
if (Options::forceEagerCompilation()) {
Options::thresholdForJITAfterWarmUp() = 10;
Options::thresholdForJITSoon() = 10;
Options::thresholdForOptimizeAfterWarmUp() = 20;
Options::thresholdForOptimizeAfterLongWarmUp() = 20;
Options::thresholdForOptimizeSoon() = 20;
Options::thresholdForFTLOptimizeAfterWarmUp() = 20;
Options::thresholdForFTLOptimizeSoon() = 20;
Options::maximumEvalCacheableSourceLength() = 150000;
Options::useConcurrentJIT() = false;
}
if (Options::useMaximalFlushInsertionPhase()) {
Options::useOSREntryToDFG() = false;
Options::useOSREntryToFTL() = false;
}
#if ENABLE(SEPARATED_WX_HEAP)
// Override globally for now. Longer term we'll just make the default
// be to have this option enabled, and have platforms that don't support
// it just silently use a single mapping.
Options::useSeparatedWXHeap() = true;
#else
Options::useSeparatedWXHeap() = false;
#endif
if (Options::alwaysUseShadowChicken())
Options::maximumInliningDepth() = 1;
// Compute the maximum value of the reoptimization retry counter. This is simply
// the largest value at which we don't overflow the execute counter, when using it
// to left-shift the execution counter by this amount. Currently the value ends
// up being 18, so this loop is not so terrible; it probably takes up ~100 cycles
// total on a 32-bit processor.
Options::reoptimizationRetryCounterMax() = 0;
while ((static_cast<int64_t>(Options::thresholdForOptimizeAfterLongWarmUp()) << (Options::reoptimizationRetryCounterMax() + 1)) <= static_cast<int64_t>(std::numeric_limits<int32_t>::max()))
Options::reoptimizationRetryCounterMax()++;
ASSERT((static_cast<int64_t>(Options::thresholdForOptimizeAfterLongWarmUp()) << Options::reoptimizationRetryCounterMax()) > 0);
ASSERT((static_cast<int64_t>(Options::thresholdForOptimizeAfterLongWarmUp()) << Options::reoptimizationRetryCounterMax()) <= static_cast<int64_t>(std::numeric_limits<int32_t>::max()));
#if !defined(NDEBUG)
if (Options::maxSingleAllocationSize())
fastSetMaxSingleAllocationSize(Options::maxSingleAllocationSize());
else
fastSetMaxSingleAllocationSize(std::numeric_limits<size_t>::max());
#endif
if (Options::useZombieMode()) {
Options::sweepSynchronously() = true;
Options::scribbleFreeCells() = true;
}
if (Options::reservedZoneSize() < minimumReservedZoneSize)
Options::reservedZoneSize() = minimumReservedZoneSize;
if (Options::softReservedZoneSize() < Options::reservedZoneSize() + minimumReservedZoneSize)
Options::softReservedZoneSize() = Options::reservedZoneSize() + minimumReservedZoneSize;
#if USE(JSVALUE32_64)
// FIXME: Make probe OSR exit work on 32-bit:
// https://bugs.webkit.org/show_bug.cgi?id=177956
Options::useProbeOSRExit() = false;
#endif
if (!Options::useCodeCache())
Options::diskCachePath() = nullptr;
}
void Options::initialize()
{
static std::once_flag initializeOptionsOnceFlag;
std::call_once(
initializeOptionsOnceFlag,
[] {
// Initialize each of the options with their default values:
#define FOR_EACH_OPTION(type_, name_, defaultValue_, availability_, description_) \
name_() = defaultValue_; \
name_##Default() = defaultValue_;
JSC_OPTIONS(FOR_EACH_OPTION)
#undef FOR_EACH_OPTION
overrideDefaults();
// Allow environment vars to override options if applicable.
// The evn var should be the name of the option prefixed with
// "JSC_".
#if PLATFORM(COCOA)
bool hasBadOptions = false;
for (char** envp = *_NSGetEnviron(); *envp; envp++) {
const char* env = *envp;
if (!strncmp("JSC_", env, 4)) {
if (!Options::setOption(&env[4])) {
dataLog("ERROR: invalid option: ", *envp, "\n");
hasBadOptions = true;
}
}
}
if (hasBadOptions && Options::validateOptions())
CRASH();
#else // PLATFORM(COCOA)
#define FOR_EACH_OPTION(type_, name_, defaultValue_, availability_, description_) \
overrideOptionWithHeuristic(name_(), name_##ID, "JSC_" #name_, Availability::availability_);
JSC_OPTIONS(FOR_EACH_OPTION)
#undef FOR_EACH_OPTION
#endif // PLATFORM(COCOA)
#define FOR_EACH_OPTION(aliasedName_, unaliasedName_, equivalence_) \
overrideAliasedOptionWithHeuristic("JSC_" #aliasedName_);
JSC_ALIASED_OPTIONS(FOR_EACH_OPTION)
#undef FOR_EACH_OPTION
#if 0
; // Deconfuse editors that do auto indentation
#endif
correctOptions();
recomputeDependentOptions();
// Do range checks where needed and make corrections to the options:
ASSERT(Options::thresholdForOptimizeAfterLongWarmUp() >= Options::thresholdForOptimizeAfterWarmUp());
ASSERT(Options::thresholdForOptimizeAfterWarmUp() >= Options::thresholdForOptimizeSoon());
ASSERT(Options::thresholdForOptimizeAfterWarmUp() >= 0);
ASSERT(Options::criticalGCMemoryThreshold() > 0.0 && Options::criticalGCMemoryThreshold() < 1.0);
dumpOptionsIfNeeded();
ensureOptionsAreCoherent();
#if HAVE(MACH_EXCEPTIONS)
if (Options::useMachForExceptions())
handleSignalsWithMach();
#endif
#if ASAN_ENABLED && OS(LINUX) && ENABLE(WEBASSEMBLY_FAST_MEMORY)
if (Options::useWebAssemblyFastMemory()) {
const char* asanOptions = getenv("ASAN_OPTIONS");
bool okToUseWebAssemblyFastMemory = asanOptions
&& (strstr(asanOptions, "allow_user_segv_handler=1") || strstr(asanOptions, "handle_segv=0"));
if (!okToUseWebAssemblyFastMemory) {
dataLogLn("WARNING: ASAN interferes with JSC signal handlers; useWebAssemblyFastMemory will be disabled.");
Options::useWebAssemblyFastMemory() = false;
}
}
#endif
#if CPU(X86_64) && OS(DARWIN)
Options::dumpZappedCellCrashData() =
(hwPhysicalCPUMax() >= 4) && (hwL3CacheSize() >= static_cast<int64_t>(6 * MB));
#endif
});
}
void Options::dumpOptionsIfNeeded()
{
if (Options::dumpOptions()) {
DumpLevel level = static_cast<DumpLevel>(Options::dumpOptions());
if (level > DumpLevel::Verbose)
level = DumpLevel::Verbose;
const char* title = nullptr;
switch (level) {
case DumpLevel::None:
break;
case DumpLevel::Overridden:
title = "Overridden JSC options:";
break;
case DumpLevel::All:
title = "All JSC options:";
break;
case DumpLevel::Verbose:
title = "All JSC options with descriptions:";
break;
}
StringBuilder builder;
dumpAllOptions(builder, level, title, nullptr, " ", "\n", DumpDefaults);
dataLog(builder.toString());
}
}
static bool isSeparator(char c)
{
return isASCIISpace(c) || (c == ',');
}
bool Options::setOptions(const char* optionsStr)
{
Vector<char*> options;
size_t length = strlen(optionsStr);
char* optionsStrCopy = WTF::fastStrDup(optionsStr);
char* end = optionsStrCopy + length;
char* p = optionsStrCopy;
while (p < end) {
// Skip separators (white space or commas).
while (p < end && isSeparator(*p))
p++;
if (p == end)
break;
char* optionStart = p;
p = strstr(p, "=");
if (!p) {
dataLogF("'=' not found in option string: %p\n", optionStart);
WTF::fastFree(optionsStrCopy);
return false;
}
p++;
char* valueBegin = p;
bool hasStringValue = false;
const int minStringLength = 2; // The min is an empty string i.e. 2 double quotes.
if ((p + minStringLength < end) && (*p == '"')) {
p = strstr(p + 1, "\"");
if (!p) {
dataLogF("Missing trailing '\"' in option string: %p\n", optionStart);
WTF::fastFree(optionsStrCopy);
return false; // End of string not found.
}
hasStringValue = true;
}
// Find next separator (white space or commas).
while (p < end && !isSeparator(*p))
p++;
if (!p)
p = end; // No more " " separator. Hence, this is the last arg.
// If we have a well-formed string value, strip the quotes.
if (hasStringValue) {
char* valueEnd = p;
ASSERT((*valueBegin == '"') && ((valueEnd - valueBegin) >= minStringLength) && (valueEnd[-1] == '"'));
memmove(valueBegin, valueBegin + 1, valueEnd - valueBegin - minStringLength);
valueEnd[-minStringLength] = '\0';
}
// Strip leading -- if present.
if ((p - optionStart > 2) && optionStart[0] == '-' && optionStart[1] == '-')
optionStart += 2;
*p++ = '\0';
options.append(optionStart);
}
bool success = true;
for (auto& option : options) {
bool optionSuccess = setOption(option);
if (!optionSuccess) {
dataLogF("Failed to set option : %s\n", option);
success = false;
}
}
correctOptions();
recomputeDependentOptions();
dumpOptionsIfNeeded();
ensureOptionsAreCoherent();
WTF::fastFree(optionsStrCopy);
return success;
}
// Parses a single command line option in the format "<optionName>=<value>"
// (no spaces allowed) and set the specified option if appropriate.
bool Options::setOptionWithoutAlias(const char* arg)
{
// arg should look like this:
// <jscOptionName>=<appropriate value>
const char* equalStr = strchr(arg, '=');
if (!equalStr)
return false;
const char* valueStr = equalStr + 1;
// For each option, check if the specify arg is a match. If so, set the arg
// if the value makes sense. Otherwise, move on to checking the next option.
#define FOR_EACH_OPTION(type_, name_, defaultValue_, availability_, description_) \
if (strlen(#name_) == static_cast<size_t>(equalStr - arg) \
&& !strncmp(arg, #name_, equalStr - arg)) { \
if (Availability::availability_ != Availability::Normal \
&& !isAvailable(name_##ID, Availability::availability_)) \
return false; \
type_ value; \
value = (defaultValue_); \
bool success = parse(valueStr, value); \
if (success) { \
name_() = value; \
correctOptions(); \
recomputeDependentOptions(); \
return true; \
} \
return false; \
}
JSC_OPTIONS(FOR_EACH_OPTION)
#undef FOR_EACH_OPTION
return false; // No option matched.
}
static bool invertBoolOptionValue(const char* valueStr, const char*& invertedValueStr)
{
bool boolValue;
if (!parse(valueStr, boolValue))
return false;
invertedValueStr = boolValue ? "false" : "true";
return true;
}
bool Options::setAliasedOption(const char* arg)
{
// arg should look like this:
// <jscOptionName>=<appropriate value>
const char* equalStr = strchr(arg, '=');
if (!equalStr)
return false;
IGNORE_WARNINGS_BEGIN("tautological-compare")
// For each option, check if the specify arg is a match. If so, set the arg
// if the value makes sense. Otherwise, move on to checking the next option.
#define FOR_EACH_OPTION(aliasedName_, unaliasedName_, equivalence) \
if (strlen(#aliasedName_) == static_cast<size_t>(equalStr - arg) \
&& !strncmp(arg, #aliasedName_, equalStr - arg)) { \
String unaliasedOption(#unaliasedName_); \
if (equivalence == SameOption) \
unaliasedOption = unaliasedOption + equalStr; \
else { \
ASSERT(equivalence == InvertedOption); \
const char* invertedValueStr = nullptr; \
if (!invertBoolOptionValue(equalStr + 1, invertedValueStr)) \
return false; \
unaliasedOption = unaliasedOption + "=" + invertedValueStr; \
} \
return setOptionWithoutAlias(unaliasedOption.utf8().data()); \
}
JSC_ALIASED_OPTIONS(FOR_EACH_OPTION)
#undef FOR_EACH_OPTION
IGNORE_WARNINGS_END
return false; // No option matched.
}
bool Options::setOption(const char* arg)
{
bool success = setOptionWithoutAlias(arg);
if (success)
return true;
return setAliasedOption(arg);
}
void Options::dumpAllOptions(StringBuilder& builder, DumpLevel level, const char* title,
const char* separator, const char* optionHeader, const char* optionFooter, DumpDefaultsOption dumpDefaultsOption)
{
if (title) {
builder.append(title);
builder.append('\n');
}
for (int id = 0; id < numberOfOptions; id++) {
if (separator && id)
builder.append(separator);
dumpOption(builder, level, static_cast<ID>(id), optionHeader, optionFooter, dumpDefaultsOption);
}
}
void Options::dumpAllOptionsInALine(StringBuilder& builder)
{
dumpAllOptions(builder, DumpLevel::All, nullptr, " ", nullptr, nullptr, DontDumpDefaults);
}
void Options::dumpAllOptions(FILE* stream, DumpLevel level, const char* title)
{
StringBuilder builder;
dumpAllOptions(builder, level, title, nullptr, " ", "\n", DumpDefaults);
fprintf(stream, "%s", builder.toString().utf8().data());
}
void Options::dumpOption(StringBuilder& builder, DumpLevel level, Options::ID id,
const char* header, const char* footer, DumpDefaultsOption dumpDefaultsOption)
{
if (id >= numberOfOptions)
return; // Illegal option.
Option option(id);
Availability availability = option.availability();
if (availability != Availability::Normal && !isAvailable(id, availability))
return;
bool wasOverridden = option.isOverridden();
bool needsDescription = (level == DumpLevel::Verbose && option.description());
if (level == DumpLevel::Overridden && !wasOverridden)
return;
if (header)
builder.append(header);
builder.append(option.name());
builder.append('=');
option.dump(builder);
if (wasOverridden && (dumpDefaultsOption == DumpDefaults)) {
builder.appendLiteral(" (default: ");
option.defaultOption().dump(builder);
builder.appendLiteral(")");
}
if (needsDescription) {
builder.appendLiteral(" ... ");
builder.append(option.description());
}
builder.append(footer);
}
void Options::ensureOptionsAreCoherent()
{
bool coherent = true;
if (!(useLLInt() || useJIT())) {
coherent = false;
dataLog("INCOHERENT OPTIONS: at least one of useLLInt or useJIT must be true\n");
}
if (!coherent)
CRASH();
}
void Option::dump(StringBuilder& builder) const
{
switch (type()) {
case Options::Type::boolType:
builder.append(m_entry.boolVal ? "true" : "false");
break;
case Options::Type::unsignedType:
builder.appendNumber(m_entry.unsignedVal);
break;
case Options::Type::sizeType:
builder.appendNumber(m_entry.sizeVal);
break;
case Options::Type::doubleType:
builder.appendFixedPrecisionNumber(m_entry.doubleVal);
break;
case Options::Type::int32Type:
builder.appendNumber(m_entry.int32Val);
break;
case Options::Type::optionRangeType:
builder.append(m_entry.optionRangeVal.rangeString());
break;
case Options::Type::optionStringType: {
const char* option = m_entry.optionStringVal;
if (!option)
option = "";
builder.append('"');
builder.append(option);
builder.append('"');
break;
}
case Options::Type::gcLogLevelType: {
builder.append(GCLogging::levelAsString(m_entry.gcLogLevelVal));
break;
}
}
}
bool Option::operator==(const Option& other) const
{
switch (type()) {
case Options::Type::boolType:
return m_entry.boolVal == other.m_entry.boolVal;
case Options::Type::unsignedType:
return m_entry.unsignedVal == other.m_entry.unsignedVal;
case Options::Type::sizeType:
return m_entry.sizeVal == other.m_entry.sizeVal;
case Options::Type::doubleType:
return (m_entry.doubleVal == other.m_entry.doubleVal) || (std::isnan(m_entry.doubleVal) && std::isnan(other.m_entry.doubleVal));
case Options::Type::int32Type:
return m_entry.int32Val == other.m_entry.int32Val;
case Options::Type::optionRangeType:
return m_entry.optionRangeVal.rangeString() == other.m_entry.optionRangeVal.rangeString();
case Options::Type::optionStringType:
return (m_entry.optionStringVal == other.m_entry.optionStringVal)
|| (m_entry.optionStringVal && other.m_entry.optionStringVal && !strcmp(m_entry.optionStringVal, other.m_entry.optionStringVal));
case Options::Type::gcLogLevelType:
return m_entry.gcLogLevelVal == other.m_entry.gcLogLevelVal;
}
return false;
}
} // namespace JSC
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