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cobalt / cobalt / da5c4f09a295755b8923113581bebdc12153e6dd / . / src / third_party / mozjs / js / src / jsapi.cpp
blob: 033642a13b42526b701ae266a1eebcb37ffec510 [file] [log] [blame]
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sts=4 et sw=4 tw=99:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* JavaScript API.
*/
#include "jsapi.h"
#include "mozilla/FloatingPoint.h"
#include "mozilla/PodOperations.h"
#include "mozilla/ThreadLocal.h"
#include <ctype.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include "jstypes.h"
#include "jsutil.h"
#include "jsprf.h"
#include "jsarray.h"
#include "jsatom.h"
#include "jsbool.h"
#include "jsclone.h"
#include "jscntxt.h"
#include "jsdate.h"
#include "jsdtoa.h"
#include "jsexn.h"
#include "jsfun.h"
#include "jsgc.h"
#include "jsiter.h"
#include "jslock.h"
#include "jsmath.h"
#include "jsnativestack.h"
#include "jsnum.h"
#include "json.h"
#include "jsobj.h"
#include "jsproxy.h"
#include "jsscript.h"
#include "jsstr.h"
#include "prmjtime.h"
#include "jsweakmap.h"
#include "jswrapper.h"
#include "jstypedarray.h"
#ifdef JS_THREADSAFE
#include "jsworkers.h"
#endif
#include "builtin/Eval.h"
#include "builtin/Intl.h"
#include "builtin/MapObject.h"
#include "builtin/RegExp.h"
#include "builtin/ParallelArray.h"
#include "frontend/BytecodeCompiler.h"
#include "frontend/FullParseHandler.h" // for JS_BufferIsCompileableUnit
#include "frontend/Parser.h" // for JS_BufferIsCompileableUnit
#include "gc/Marking.h"
#include "gc/Memory.h"
#include "jit/AsmJS.h"
#include "jit/PcScriptCache.h"
#include "js/CharacterEncoding.h"
#include "vm/Debugger.h"
#include "vm/Interpreter.h"
#include "vm/NumericConversions.h"
#include "vm/Shape.h"
#include "vm/StopIterationObject.h"
#include "vm/StringBuffer.h"
#include "vm/WeakMapObject.h"
#include "vm/Xdr.h"
#include "yarr/BumpPointerAllocator.h"
#include "jsatominlines.h"
#include "jsinferinlines.h"
#include "jsscriptinlines.h"
#include "vm/Interpreter-inl.h"
#include "vm/ObjectImpl-inl.h"
#include "vm/RegExpObject-inl.h"
#include "vm/RegExpStatics-inl.h"
#include "vm/Shape-inl.h"
#include "vm/String-inl.h"
#if ENABLE_YARR_JIT
#include "assembler/jit/ExecutableAllocator.h"
#endif
#ifdef JS_ION
#include "jit/Ion.h"
#endif
#include "nb/memory_scope.h"
#include "starboard/file.h"
using namespace js;
using namespace js::gc;
using namespace js::types;
using mozilla::Maybe;
using mozilla::PodCopy;
using mozilla::PodZero;
using js::frontend::Parser;
bool
JS::detail::CallMethodIfWrapped(JSContext *cx, IsAcceptableThis test, NativeImpl impl,
CallArgs args)
{
TRACK_MEMORY_SCOPE("Javascript");
const Value &thisv = args.thisv();
JS_ASSERT(!test(thisv));
if (thisv.isObject()) {
JSObject &thisObj = args.thisv().toObject();
if (thisObj.isProxy())
return Proxy::nativeCall(cx, test, impl, args);
}
ReportIncompatible(cx, args);
return false;
}
#ifdef HAVE_VA_LIST_AS_ARRAY
#define JS_ADDRESSOF_VA_LIST(ap) ((va_list *)(ap))
#else
#define JS_ADDRESSOF_VA_LIST(ap) (&(ap))
#endif
#ifdef JS_USE_JSID_STRUCT_TYPES
const jsid JSID_VOID = { size_t(JSID_TYPE_VOID) };
const jsid JSID_EMPTY = { size_t(JSID_TYPE_OBJECT) };
#endif
const jsval JSVAL_NULL = IMPL_TO_JSVAL(BUILD_JSVAL(JSVAL_TAG_NULL, 0));
const jsval JSVAL_ZERO = IMPL_TO_JSVAL(BUILD_JSVAL(JSVAL_TAG_INT32, 0));
const jsval JSVAL_ONE = IMPL_TO_JSVAL(BUILD_JSVAL(JSVAL_TAG_INT32, 1));
const jsval JSVAL_FALSE = IMPL_TO_JSVAL(BUILD_JSVAL(JSVAL_TAG_BOOLEAN, JS_FALSE));
const jsval JSVAL_TRUE = IMPL_TO_JSVAL(BUILD_JSVAL(JSVAL_TAG_BOOLEAN, JS_TRUE));
const jsval JSVAL_VOID = IMPL_TO_JSVAL(BUILD_JSVAL(JSVAL_TAG_UNDEFINED, 0));
const HandleValue JS::NullHandleValue =
HandleValue::fromMarkedLocation(&JSVAL_NULL);
const HandleValue JS::UndefinedHandleValue =
HandleValue::fromMarkedLocation(&JSVAL_VOID);
const jsid voidIdValue = JSID_VOID;
const jsid emptyIdValue = JSID_EMPTY;
const HandleId JS::JSID_VOIDHANDLE = HandleId::fromMarkedLocation(&voidIdValue);
const HandleId JS::JSID_EMPTYHANDLE = HandleId::fromMarkedLocation(&emptyIdValue);
/* Make sure that jschar is two bytes unsigned integer */
JS_STATIC_ASSERT((jschar)-1 > 0);
JS_STATIC_ASSERT(sizeof(jschar) == 2);
JS_PUBLIC_API(int64_t)
JS_Now()
{
return PRMJ_Now();
}
JS_PUBLIC_API(jsval)
JS_GetNaNValue(JSContext *cx)
{
return cx->runtime()->NaNValue;
}
JS_PUBLIC_API(jsval)
JS_GetNegativeInfinityValue(JSContext *cx)
{
return cx->runtime()->negativeInfinityValue;
}
JS_PUBLIC_API(jsval)
JS_GetPositiveInfinityValue(JSContext *cx)
{
return cx->runtime()->positiveInfinityValue;
}
JS_PUBLIC_API(jsval)
JS_GetEmptyStringValue(JSContext *cx)
{
return STRING_TO_JSVAL(cx->runtime()->emptyString);
}
JS_PUBLIC_API(JSString *)
JS_GetEmptyString(JSRuntime *rt)
{
JS_ASSERT(rt->hasContexts());
return rt->emptyString;
}
static void
AssertHeapIsIdle(JSRuntime *rt)
{
JS_ASSERT(rt->heapState == js::Idle);
}
static void
AssertHeapIsIdle(JSContext *cx)
{
AssertHeapIsIdle(cx->runtime());
}
static void
AssertHeapIsIdleOrIterating(JSRuntime *rt)
{
JS_ASSERT(!rt->isHeapCollecting());
}
static void
AssertHeapIsIdleOrIterating(JSContext *cx)
{
AssertHeapIsIdleOrIterating(cx->runtime());
}
static void
AssertHeapIsIdleOrStringIsFlat(JSContext *cx, JSString *str)
{
/*
* We allow some functions to be called during a GC as long as the argument
* is a flat string, since that will not cause allocation.
*/
JS_ASSERT_IF(cx->runtime()->isHeapBusy(), str->isFlat());
}
JS_PUBLIC_API(JSBool)
JS_ConvertArguments(JSContext *cx, unsigned argc, jsval *argv, const char *format, ...)
{
TRACK_MEMORY_SCOPE("Javascript");
va_list ap;
JSBool ok;
AssertHeapIsIdle(cx);
va_start(ap, format);
ok = JS_ConvertArgumentsVA(cx, argc, argv, format, ap);
va_end(ap);
return ok;
}
JS_PUBLIC_API(JSBool)
JS_ConvertArgumentsVA(JSContext *cx, unsigned argc, jsval *argv, const char *format, va_list ap)
{
TRACK_MEMORY_SCOPE("Javascript");
jsval *sp;
JSBool required;
char c;
double d;
JSString *str;
RootedObject obj(cx);
RootedValue val(cx);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, JSValueArray(argv - 2, argc + 2));
sp = argv;
required = JS_TRUE;
while ((c = *format++) != '\0') {
if (isspace(c))
continue;
if (c == '/') {
required = JS_FALSE;
continue;
}
if (sp == argv + argc) {
if (required) {
if (JSFunction *fun = ReportIfNotFunction(cx, argv[-2])) {
char numBuf[12];
JS_snprintf(numBuf, sizeof numBuf, "%u", argc);
JSAutoByteString funNameBytes;
if (const char *name = GetFunctionNameBytes(cx, fun, &funNameBytes)) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_MORE_ARGS_NEEDED,
name, numBuf, (argc == 1) ? "" : "s");
}
}
return JS_FALSE;
}
break;
}
switch (c) {
case 'b':
*va_arg(ap, JSBool *) = ToBoolean(*sp);
break;
case 'c':
if (!JS_ValueToUint16(cx, *sp, va_arg(ap, uint16_t *)))
return JS_FALSE;
break;
case 'i':
if (!JS_ValueToECMAInt32(cx, *sp, va_arg(ap, int32_t *)))
return JS_FALSE;
break;
case 'u':
if (!JS_ValueToECMAUint32(cx, *sp, va_arg(ap, uint32_t *)))
return JS_FALSE;
break;
case 'j':
if (!JS_ValueToInt32(cx, *sp, va_arg(ap, int32_t *)))
return JS_FALSE;
break;
case 'd':
if (!JS_ValueToNumber(cx, *sp, va_arg(ap, double *)))
return JS_FALSE;
break;
case 'I':
if (!JS_ValueToNumber(cx, *sp, &d))
return JS_FALSE;
*va_arg(ap, double *) = ToInteger(d);
break;
case 'S':
case 'W':
val = *sp;
str = ToString<CanGC>(cx, val);
if (!str)
return JS_FALSE;
*sp = STRING_TO_JSVAL(str);
if (c == 'W') {
JSStableString *stable = str->ensureStable(cx);
if (!stable)
return JS_FALSE;
*va_arg(ap, const jschar **) = stable->chars().get();
} else {
*va_arg(ap, JSString **) = str;
}
break;
case 'o':
if (!js_ValueToObjectOrNull(cx, *sp, &obj))
return JS_FALSE;
*sp = OBJECT_TO_JSVAL(obj);
*va_arg(ap, JSObject **) = obj;
break;
case 'f':
obj = ReportIfNotFunction(cx, *sp);
if (!obj)
return JS_FALSE;
*sp = OBJECT_TO_JSVAL(obj);
*va_arg(ap, JSFunction **) = &obj->as<JSFunction>();
break;
case 'v':
*va_arg(ap, jsval *) = *sp;
break;
case '*':
break;
default:
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_BAD_CHAR, format);
return JS_FALSE;
}
sp++;
}
return JS_TRUE;
}
JS_PUBLIC_API(JSBool)
JS_ConvertValue(JSContext *cx, jsval valueArg, JSType type, jsval *vp)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedValue value(cx, valueArg);
JSBool ok;
RootedObject obj(cx);
JSString *str;
double d;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
switch (type) {
case JSTYPE_VOID:
*vp = JSVAL_VOID;
ok = JS_TRUE;
break;
case JSTYPE_OBJECT:
ok = js_ValueToObjectOrNull(cx, value, &obj);
if (ok)
*vp = OBJECT_TO_JSVAL(obj);
break;
case JSTYPE_FUNCTION:
*vp = value;
obj = ReportIfNotFunction(cx, *vp);
ok = (obj != NULL);
break;
case JSTYPE_STRING:
str = ToString<CanGC>(cx, value);
ok = (str != NULL);
if (ok)
*vp = STRING_TO_JSVAL(str);
break;
case JSTYPE_NUMBER:
ok = JS_ValueToNumber(cx, value, &d);
if (ok)
*vp = DOUBLE_TO_JSVAL(d);
break;
case JSTYPE_BOOLEAN:
*vp = BooleanValue(ToBoolean(value));
return JS_TRUE;
default: {
char numBuf[12];
JS_snprintf(numBuf, sizeof numBuf, "%d", (int)type);
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_BAD_TYPE, numBuf);
ok = JS_FALSE;
break;
}
}
return ok;
}
JS_PUBLIC_API(JSBool)
JS_ValueToObject(JSContext *cx, jsval valueArg, JSObject **objpArg)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedValue value(cx, valueArg);
RootedObject objp(cx, *objpArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
if (!js_ValueToObjectOrNull(cx, value, &objp))
return false;
*objpArg = objp;
return true;
}
JS_PUBLIC_API(JSFunction *)
JS_ValueToFunction(JSContext *cx, jsval valueArg)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedValue value(cx, valueArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
return ReportIfNotFunction(cx, value);
}
JS_PUBLIC_API(JSFunction *)
JS_ValueToConstructor(JSContext *cx, jsval valueArg)
{
RootedValue value(cx, valueArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
return ReportIfNotFunction(cx, value);
}
JS_PUBLIC_API(JSString *)
JS_ValueToString(JSContext *cx, jsval valueArg)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedValue value(cx, valueArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
return ToString<CanGC>(cx, value);
}
JS_PUBLIC_API(JSString *)
JS_ValueToSource(JSContext *cx, jsval valueArg)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedValue value(cx, valueArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
return ValueToSource(cx, value);
}
JS_PUBLIC_API(JSBool)
JS_ValueToNumber(JSContext *cx, jsval valueArg, double *dp)
{
RootedValue value(cx, valueArg);
return JS::ToNumber(cx, value, dp);
}
JS_PUBLIC_API(JSBool)
JS_DoubleIsInt32(double d, int32_t *ip)
{
return mozilla::DoubleIsInt32(d, ip);
}
JS_PUBLIC_API(int32_t)
JS_DoubleToInt32(double d)
{
return ToInt32(d);
}
JS_PUBLIC_API(uint32_t)
JS_DoubleToUint32(double d)
{
return ToUint32(d);
}
JS_PUBLIC_API(JSBool)
JS_ValueToECMAInt32(JSContext *cx, jsval valueArg, int32_t *ip)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedValue value(cx, valueArg);
return JS::ToInt32(cx, value, ip);
}
JS_PUBLIC_API(JSBool)
JS_ValueToECMAUint32(JSContext *cx, jsval valueArg, uint32_t *ip)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedValue value(cx, valueArg);
return JS::ToUint32(cx, value, ip);
}
JS_PUBLIC_API(JSBool)
JS_ValueToInt64(JSContext *cx, jsval valueArg, int64_t *ip)
{
RootedValue value(cx, valueArg);
return JS::ToInt64(cx, value, ip);
}
JS_PUBLIC_API(JSBool)
JS_ValueToUint64(JSContext *cx, jsval valueArg, uint64_t *ip)
{
RootedValue value(cx, valueArg);
return JS::ToUint64(cx, value, ip);
}
JS_PUBLIC_API(JSBool)
JS_ValueToInt32(JSContext *cx, jsval vArg, int32_t *ip)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedValue v(cx, vArg);
assertSameCompartment(cx, v);
if (v.isInt32()) {
*ip = v.toInt32();
return true;
}
double d;
if (v.isDouble()) {
d = v.toDouble();
} else if (!ToNumberSlow(cx, v, &d)) {
return false;
}
if (mozilla::IsNaN(d) || d <= -2147483649.0 || 2147483648.0 <= d) {
js_ReportValueError(cx, JSMSG_CANT_CONVERT,
JSDVG_SEARCH_STACK, v, NullPtr());
return false;
}
*ip = (int32_t) floor(d + 0.5); /* Round to nearest */
return true;
}
JS_PUBLIC_API(JSBool)
JS_ValueToUint16(JSContext *cx, jsval valueArg, uint16_t *ip)
{
RootedValue value(cx, valueArg);
return ToUint16(cx, value, ip);
}
JS_PUBLIC_API(JSBool)
JS_ValueToBoolean(JSContext *cx, jsval value, JSBool *bp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
*bp = ToBoolean(value);
return JS_TRUE;
}
JS_PUBLIC_API(JSType)
JS_TypeOfValue(JSContext *cx, jsval valueArg)
{
RootedValue value(cx, valueArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
return TypeOfValue(cx, value);
}
JS_PUBLIC_API(const char *)
JS_GetTypeName(JSContext *cx, JSType type)
{
if ((unsigned)type >= (unsigned)JSTYPE_LIMIT)
return NULL;
return TypeStrings[type];
}
JS_PUBLIC_API(JSBool)
JS_StrictlyEqual(JSContext *cx, jsval value1, jsval value2, JSBool *equal)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value1, value2);
bool eq;
if (!StrictlyEqual(cx, value1, value2, &eq))
return false;
*equal = eq;
return true;
}
JS_PUBLIC_API(JSBool)
JS_LooselyEqual(JSContext *cx, jsval value1Arg, jsval value2Arg, JSBool *equal)
{
RootedValue value1(cx, value1Arg);
RootedValue value2(cx, value2Arg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value1, value2);
bool eq;
if (!LooselyEqual(cx, value1, value2, &eq))
return false;
*equal = eq;
return true;
}
JS_PUBLIC_API(JSBool)
JS_SameValue(JSContext *cx, jsval value1, jsval value2, JSBool *same)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value1, value2);
bool s;
if (!SameValue(cx, value1, value2, &s))
return false;
*same = s;
return true;
}
JS_PUBLIC_API(JSBool)
JS_IsBuiltinEvalFunction(JSFunction *fun)
{
return IsAnyBuiltinEval(fun);
}
JS_PUBLIC_API(JSBool)
JS_IsBuiltinFunctionConstructor(JSFunction *fun)
{
return IsBuiltinFunctionConstructor(fun);
}
/************************************************************************/
/*
* Has a new runtime ever been created? This flag is used to control things
* that should happen only once across all runtimes.
*/
static JSBool js_NewRuntimeWasCalled = JS_FALSE;
/*
* Thread Local Storage slot for storing the runtime for a thread.
*/
mozilla::ThreadLocal<PerThreadData *> js::TlsPerThreadData;
#ifdef DEBUG
JS_FRIEND_API(bool)
JS::isGCEnabled()
{
return !TlsPerThreadData.get()->suppressGC;
}
#else
JS_FRIEND_API(bool) JS::isGCEnabled() { return true; }
#endif
static const JSSecurityCallbacks NullSecurityCallbacks = { };
static bool
JitSupportsFloatingPoint()
{
#if defined(JS_ION)
if (!JSC::MacroAssembler().supportsFloatingPoint())
return false;
#if defined(JS_ION) && WTF_ARM_ARCH_VERSION == 6
if (!js::jit::hasVFP())
return false;
#endif
return true;
#else
return false;
#endif
}
PerThreadData::PerThreadData(JSRuntime *runtime)
: PerThreadDataFriendFields(),
runtime_(runtime),
ionTop(NULL),
ionJSContext(NULL),
ionStackLimit(0),
activation_(NULL),
asmJSActivationStack_(NULL),
suppressGC(0)
{}
namespace {
// Some platforms require atleast a 16-byte alignment for jmp_buf.
const std::size_t kDesiredJmpBufAlignment = 16;
}
JSRuntime::JSRuntime(JSUseHelperThreads useHelperThreads)
: mainThread(this),
interrupt(0),
#ifdef JS_THREADSAFE
operationCallbackLock(NULL),
#ifdef DEBUG
operationCallbackOwner(NULL),
#endif
#endif
atomsCompartment(NULL),
systemZone(NULL),
numCompartments(0),
localeCallbacks(NULL),
defaultLocale(NULL),
defaultVersion_(JSVERSION_DEFAULT),
#ifdef JS_THREADSAFE
ownerThread_(NULL),
#endif
tempLifoAlloc(TEMP_LIFO_ALLOC_PRIMARY_CHUNK_SIZE),
freeLifoAlloc(TEMP_LIFO_ALLOC_PRIMARY_CHUNK_SIZE),
#if ENABLE_ASSEMBLER
execAlloc_(NULL),
#endif
bumpAlloc_(NULL),
ionRuntime_(NULL),
selfHostingGlobal_(NULL),
selfHostedClasses_(NULL),
nativeStackBase(0),
nativeStackQuota(0),
interpreterFrames(NULL),
cxCallback(NULL),
destroyCompartmentCallback(NULL),
destroyZoneCallback(NULL),
sweepZoneCallback(NULL),
compartmentNameCallback(NULL),
activityCallback(NULL),
activityCallbackArg(NULL),
#ifdef JS_THREADSAFE
requestDepth(0),
# ifdef DEBUG
checkRequestDepth(0),
# endif
#endif
gcSystemAvailableChunkListHead(NULL),
gcUserAvailableChunkListHead(NULL),
gcKeepAtoms(0),
gcBytes(0),
gcMaxBytes(0),
gcMaxMallocBytes(0),
gcNumArenasFreeCommitted(0),
gcMarker(this),
gcVerifyPreData(NULL),
gcVerifyPostData(NULL),
gcChunkAllocationSinceLastGC(false),
gcNextFullGCTime(0),
gcLastGCTime(0),
gcJitReleaseTime(0),
gcMode(JSGC_MODE_GLOBAL),
gcAllocationThreshold(30 * 1024 * 1024),
gcHighFrequencyGC(false),
gcHighFrequencyTimeThreshold(1000),
gcHighFrequencyLowLimitBytes(100 * 1024 * 1024),
gcHighFrequencyHighLimitBytes(500 * 1024 * 1024),
gcHighFrequencyHeapGrowthMax(3.0),
gcHighFrequencyHeapGrowthMin(1.5),
gcLowFrequencyHeapGrowth(1.5),
gcDynamicHeapGrowth(false),
gcDynamicMarkSlice(false),
gcDecommitThreshold(32 * 1024 * 1024),
gcShouldCleanUpEverything(false),
gcGrayBitsValid(false),
gcIsNeeded(0),
gcStats(thisFromCtor()),
gcNumber(0),
gcStartNumber(0),
gcIsFull(false),
gcTriggerReason(JS::gcreason::NO_REASON),
gcStrictCompartmentChecking(false),
#ifdef DEBUG
gcDisableStrictProxyCheckingCount(0),
#endif
gcIncrementalState(gc::NO_INCREMENTAL),
gcLastMarkSlice(false),
gcSweepOnBackgroundThread(false),
gcFoundBlackGrayEdges(false),
gcSweepingZones(NULL),
gcZoneGroupIndex(0),
gcZoneGroups(NULL),
gcCurrentZoneGroup(NULL),
gcSweepPhase(0),
gcSweepZone(NULL),
gcSweepKindIndex(0),
gcAbortSweepAfterCurrentGroup(false),
gcArenasAllocatedDuringSweep(NULL),
#ifdef DEBUG
gcMarkingValidator(NULL),
#endif
gcInterFrameGC(0),
gcSliceBudget(SliceBudget::Unlimited),
gcIncrementalEnabled(true),
gcGenerationalEnabled(true),
gcManipulatingDeadZones(false),
gcObjectsMarkedInDeadZones(0),
gcPoke(false),
heapState(Idle),
#ifdef JSGC_GENERATIONAL
gcNursery(thisFromCtor()),
gcStoreBuffer(thisFromCtor()),
#endif
#ifdef JS_GC_ZEAL
gcZeal_(0),
gcZealFrequency(0),
gcNextScheduled(0),
gcDeterministicOnly(false),
gcIncrementalLimit(0),
#endif
gcValidate(true),
gcFullCompartmentChecks(false),
gcCallback(NULL),
gcSliceCallback(NULL),
gcFinalizeCallback(NULL),
analysisPurgeCallback(NULL),
analysisPurgeTriggerBytes(0),
gcMallocBytes(0),
autoGCRooters(NULL),
scriptAndCountsVector(NULL),
NaNValue(UndefinedValue()),
negativeInfinityValue(UndefinedValue()),
positiveInfinityValue(UndefinedValue()),
emptyString(NULL),
sourceHook(NULL),
debugMode(false),
spsProfiler(thisFromCtor()),
profilingScripts(false),
alwaysPreserveCode(false),
hadOutOfMemory(false),
data(NULL),
gcLock(NULL),
gcHelperThread(thisFromCtor()),
#ifdef JS_THREADSAFE
#ifdef JS_ION
workerThreadState(NULL),
#endif
sourceCompressorThread(),
#endif
defaultFreeOp_(thisFromCtor(), false),
debuggerMutations(0),
securityCallbacks(const_cast<JSSecurityCallbacks *>(&NullSecurityCallbacks)),
DOMcallbacks(NULL),
destroyPrincipals(NULL),
structuredCloneCallbacks(NULL),
telemetryCallback(NULL),
propertyRemovals(0),
#if !ENABLE_INTL_API
thousandsSeparator(0),
decimalSeparator(0),
numGrouping(0),
#endif
// Note: alignas(16) is too big for some compilers, and thus a more
// verbose approach needed to be taken.
conservativeGC_memory(reinterpret_cast<js::ConservativeGCData*>(
SbMemoryAllocateAligned(kDesiredJmpBufAlignment,
sizeof(js::ConservativeGCData)))),
conservativeGC(*conservativeGC_memory),
mathCache_(NULL),
dtoaState(NULL),
activeCompilations(0),
trustedPrincipals_(NULL),
wrapObjectCallback(TransparentObjectWrapper),
sameCompartmentWrapObjectCallback(NULL),
preWrapObjectCallback(NULL),
preserveWrapperCallback(NULL),
#ifdef DEBUG
noGCOrAllocationCheck(0),
#endif
jitHardening(false),
jitSupportsFloatingPoint(false),
ionPcScriptCache(NULL),
threadPool(this),
ctypesActivityCallback(NULL),
parallelWarmup(0),
ionReturnOverride_(MagicValue(JS_ARG_POISON)),
useHelperThreads_(useHelperThreads),
requestedHelperThreadCount(-1)
#ifdef DEBUG
, enteredPolicy(NULL)
#endif
{
/* Initialize infallibly first, so we can goto bad and JS_DestroyRuntime. */
JS_INIT_CLIST(&onNewGlobalObjectWatchers);
PodZero(&debugHooks);
PodZero(&atomState);
#if JS_STACK_GROWTH_DIRECTION > 0
nativeStackLimit = UINTPTR_MAX;
#endif
}
bool
JSRuntime::init(uint32_t maxbytes)
{
TRACK_MEMORY_SCOPE("Javascript");
#ifdef JS_THREADSAFE
ownerThread_ = PR_GetCurrentThread();
operationCallbackLock = PR_NewLock();
if (!operationCallbackLock)
return false;
#endif
js::TlsPerThreadData.set(&mainThread);
if (!js_InitGC(this, maxbytes))
return false;
if (!gcMarker.init())
return false;
#if !defined(STARBOARD)
const char *size = getenv("JSGC_MARK_STACK_LIMIT");
if (size)
SetMarkStackLimit(this, atoi(size));
#endif
ScopedJSDeletePtr<Zone> atomsZone(new_<Zone>(this));
if (!atomsZone)
return false;
JS::CompartmentOptions options;
ScopedJSDeletePtr<JSCompartment> atomsCompartment(new_<JSCompartment>(atomsZone.get(), options));
if (!atomsCompartment || !atomsCompartment->init(NULL))
return false;
zones.append(atomsZone.get());
atomsZone->compartments.append(atomsCompartment.get());
atomsCompartment->isSystem = true;
atomsZone->isSystem = true;
atomsZone->setGCLastBytes(8192, GC_NORMAL);
atomsZone.forget();
this->atomsCompartment = atomsCompartment.forget();
if (!InitAtoms(this))
return false;
if (!InitRuntimeNumberState(this))
return false;
dtoaState = js_NewDtoaState();
if (!dtoaState)
return false;
dateTimeInfo.updateTimeZoneAdjustment();
if (!scriptDataTable.init())
return false;
if (!threadPool.init())
return false;
#ifdef JS_THREADSAFE
if (useHelperThreads() && !sourceCompressorThread.init())
return false;
#endif
if (!evalCache.init())
return false;
nativeStackBase = GetNativeStackBase();
jitSupportsFloatingPoint = JitSupportsFloatingPoint();
return true;
}
JSRuntime::~JSRuntime()
{
SbMemoryDeallocateAligned(conservativeGC_memory);
#ifdef JS_THREADSAFE
clearOwnerThread();
JS_ASSERT(!operationCallbackOwner);
if (operationCallbackLock)
PR_DestroyLock(operationCallbackLock);
#endif
/*
* Even though all objects in the compartment are dead, we may have keep
* some filenames around because of gcKeepAtoms.
*/
FreeScriptData(this);
#ifdef JS_THREADSAFE
# ifdef JS_ION
if (workerThreadState)
js_delete(workerThreadState);
# endif
sourceCompressorThread.finish();
#endif
#ifdef DEBUG
/* Don't hurt everyone in leaky ol' Mozilla with a fatal JS_ASSERT! */
if (hasContexts()) {
unsigned cxcount = 0;
for (ContextIter acx(this); !acx.done(); acx.next()) {
fprintf(stderr,
"JS API usage error: found live context at %p\n",
(void *) acx.get());
cxcount++;
}
fprintf(stderr,
"JS API usage error: %u context%s left in runtime upon JS_DestroyRuntime.\n",
cxcount, (cxcount == 1) ? "" : "s");
}
#endif
#if !ENABLE_INTL_API
FinishRuntimeNumberState(this);
#endif
FinishAtoms(this);
if (dtoaState)
js_DestroyDtoaState(dtoaState);
js_FinishGC(this);
#ifdef JS_THREADSAFE
if (gcLock)
PR_DestroyLock(gcLock);
#endif
js_delete(bumpAlloc_);
js_delete(mathCache_);
#ifdef JS_ION
js_delete(ionRuntime_);
#endif
#if ENABLE_ASSEMBLER
js_delete(execAlloc_); /* Delete after ionRuntime_. */
#endif
if (ionPcScriptCache)
js_delete(ionPcScriptCache);
#ifdef JSGC_GENERATIONAL
gcStoreBuffer.disable();
gcNursery.disable();
#endif
}
#ifdef JS_THREADSAFE
void
JSRuntime::setOwnerThread()
{
JS_ASSERT(ownerThread_ == (void *)0xc1ea12); /* "clear" */
JS_ASSERT(requestDepth == 0);
JS_ASSERT(js_NewRuntimeWasCalled);
JS_ASSERT(js::TlsPerThreadData.get() == NULL);
ownerThread_ = PR_GetCurrentThread();
js::TlsPerThreadData.set(&mainThread);
nativeStackBase = GetNativeStackBase();
if (nativeStackQuota)
JS_SetNativeStackQuota(this, nativeStackQuota);
#ifdef XP_MACOSX
asmJSMachExceptionHandler.setCurrentThread();
#endif
}
void
JSRuntime::clearOwnerThread()
{
assertValidThread();
JS_ASSERT(requestDepth == 0);
JS_ASSERT(js_NewRuntimeWasCalled);
ownerThread_ = (void *)0xc1ea12; /* "clear" */
js::TlsPerThreadData.set(NULL);
nativeStackBase = 0;
#if JS_STACK_GROWTH_DIRECTION > 0
mainThread.nativeStackLimit = UINTPTR_MAX;
#else
mainThread.nativeStackLimit = 0;
#endif
#ifdef XP_MACOSX
asmJSMachExceptionHandler.clearCurrentThread();
#endif
}
JS_FRIEND_API(void)
JSRuntime::abortIfWrongThread() const
{
if (ownerThread_ != PR_GetCurrentThread())
MOZ_CRASH();
if (!js::TlsPerThreadData.get()->associatedWith(this))
MOZ_CRASH();
}
#ifdef DEBUG
JS_FRIEND_API(void)
JSRuntime::assertValidThread() const
{
JS_ASSERT(ownerThread_ == PR_GetCurrentThread());
JS_ASSERT(js::TlsPerThreadData.get()->associatedWith(this));
}
#endif /* DEBUG */
#endif /* JS_THREADSAFE */
JS_PUBLIC_API(JSRuntime *)
JS_NewRuntime(uint32_t maxbytes, JSUseHelperThreads useHelperThreads)
{
TRACK_MEMORY_SCOPE("Javascript");
if (!js_NewRuntimeWasCalled) {
#ifdef DEBUG
/*
* This code asserts that the numbers associated with the error names
* in jsmsg.def are monotonically increasing. It uses values for the
* error names enumerated in jscntxt.c. It's not a compile-time check
* but it's better than nothing.
*/
int errorNumber = 0;
#define MSG_DEF(name, number, count, exception, format) \
JS_ASSERT(name == errorNumber++);
#include "js.msg"
#undef MSG_DEF
#define MSG_DEF(name, number, count, exception, format) \
JS_BEGIN_MACRO \
unsigned numfmtspecs = 0; \
const char *fmt; \
for (fmt = format; *fmt != '\0'; fmt++) { \
if (*fmt == '{' && isdigit(fmt[1])) \
++numfmtspecs; \
} \
JS_ASSERT(count == numfmtspecs); \
JS_END_MACRO;
#include "js.msg"
#undef MSG_DEF
#endif /* DEBUG */
if (!js::TlsPerThreadData.init())
return NULL;
js_NewRuntimeWasCalled = JS_TRUE;
}
JSRuntime *rt = js_new<JSRuntime>(useHelperThreads);
if (!rt)
return NULL;
#if defined(JS_ION)
if (!jit::InitializeIon())
return NULL;
#endif
if (!ForkJoinSlice::InitializeTLS())
return NULL;
if (!rt->init(maxbytes)) {
JS_DestroyRuntime(rt);
return NULL;
}
return rt;
}
JS_PUBLIC_API(void)
JS_DestroyRuntime(JSRuntime *rt)
{
js_free(rt->defaultLocale);
js_delete(rt);
}
JS_PUBLIC_API(void)
JS_ShutDown(void)
{
PRMJ_NowShutdown();
}
JS_PUBLIC_API(void *)
JS_GetRuntimePrivate(JSRuntime *rt)
{
return rt->data;
}
JS_PUBLIC_API(void)
JS_SetRuntimePrivate(JSRuntime *rt, void *data)
{
rt->data = data;
}
#ifdef JS_THREADSAFE
static void
StartRequest(JSContext *cx)
{
TRACK_MEMORY_SCOPE("Javascript");
JSRuntime *rt = cx->runtime();
rt->assertValidThread();
if (rt->requestDepth) {
rt->requestDepth++;
} else {
/* Indicate that a request is running. */
rt->requestDepth = 1;
if (rt->activityCallback)
rt->activityCallback(rt->activityCallbackArg, true);
}
}
static void
StopRequest(JSContext *cx)
{
JSRuntime *rt = cx->runtime();
rt->assertValidThread();
JS_ASSERT(rt->requestDepth != 0);
if (rt->requestDepth != 1) {
rt->requestDepth--;
} else {
rt->conservativeGC.updateForRequestEnd();
rt->requestDepth = 0;
if (rt->activityCallback)
rt->activityCallback(rt->activityCallbackArg, false);
}
}
#endif /* JS_THREADSAFE */
JS_PUBLIC_API(void)
JS_BeginRequest(JSContext *cx)
{
#ifdef JS_THREADSAFE
cx->outstandingRequests++;
StartRequest(cx);
#endif
}
JS_PUBLIC_API(void)
JS_EndRequest(JSContext *cx)
{
#ifdef JS_THREADSAFE
JS_ASSERT(cx->outstandingRequests != 0);
cx->outstandingRequests--;
StopRequest(cx);
#endif
}
JS_PUBLIC_API(JSBool)
JS_IsInRequest(JSRuntime *rt)
{
#ifdef JS_THREADSAFE
rt->assertValidThread();
return rt->requestDepth != 0;
#else
return false;
#endif
}
JS_PUBLIC_API(JSContextCallback)
JS_SetContextCallback(JSRuntime *rt, JSContextCallback cxCallback)
{
JSContextCallback old;
old = rt->cxCallback;
rt->cxCallback = cxCallback;
return old;
}
JS_PUBLIC_API(JSContext *)
JS_NewContext(JSRuntime *rt, size_t stackChunkSize)
{
return NewContext(rt, stackChunkSize);
}
JS_PUBLIC_API(void)
JS_DestroyContext(JSContext *cx)
{
JS_ASSERT(!cx->compartment());
DestroyContext(cx, DCM_FORCE_GC);
}
JS_PUBLIC_API(void)
JS_DestroyContextNoGC(JSContext *cx)
{
JS_ASSERT(!cx->compartment());
DestroyContext(cx, DCM_NO_GC);
}
JS_PUBLIC_API(void *)
JS_GetContextPrivate(JSContext *cx)
{
return cx->data;
}
JS_PUBLIC_API(void)
JS_SetContextPrivate(JSContext *cx, void *data)
{
cx->data = data;
}
JS_PUBLIC_API(void *)
JS_GetSecondContextPrivate(JSContext *cx)
{
return cx->data2;
}
JS_PUBLIC_API(void)
JS_SetSecondContextPrivate(JSContext *cx, void *data)
{
cx->data2 = data;
}
JS_PUBLIC_API(JSRuntime *)
JS_GetRuntime(JSContext *cx)
{
return cx->runtime();
}
JS_PUBLIC_API(JSContext *)
JS_ContextIterator(JSRuntime *rt, JSContext **iterp)
{
JSContext *cx = *iterp;
cx = cx ? cx->getNext() : rt->contextList.getFirst();
*iterp = cx;
return cx;
}
JS_PUBLIC_API(JSVersion)
JS_GetVersion(JSContext *cx)
{
return VersionNumber(cx->findVersion());
}
JS_PUBLIC_API(void)
JS_SetVersionForCompartment(JSCompartment *compartment, JSVersion version)
{
compartment->options().setVersion(version);
}
static struct v2smap {
JSVersion version;
const char *string;
} v2smap[] = {
{JSVERSION_ECMA_3, "ECMAv3"},
{JSVERSION_1_6, "1.6"},
{JSVERSION_1_7, "1.7"},
{JSVERSION_1_8, "1.8"},
{JSVERSION_ECMA_5, "ECMAv5"},
{JSVERSION_DEFAULT, js_default_str},
{JSVERSION_DEFAULT, "1.0"},
{JSVERSION_DEFAULT, "1.1"},
{JSVERSION_DEFAULT, "1.2"},
{JSVERSION_DEFAULT, "1.3"},
{JSVERSION_DEFAULT, "1.4"},
{JSVERSION_DEFAULT, "1.5"},
{JSVERSION_UNKNOWN, NULL}, /* must be last, NULL is sentinel */
};
JS_PUBLIC_API(const char *)
JS_VersionToString(JSVersion version)
{
int i;
for (i = 0; v2smap[i].string; i++)
if (v2smap[i].version == version)
return v2smap[i].string;
return "unknown";
}
JS_PUBLIC_API(JSVersion)
JS_StringToVersion(const char *string)
{
int i;
for (i = 0; v2smap[i].string; i++)
if (strcmp(v2smap[i].string, string) == 0)
return v2smap[i].version;
return JSVERSION_UNKNOWN;
}
JS_PUBLIC_API(uint32_t)
JS_GetOptions(JSContext *cx)
{
/*
* Can't check option/version synchronization here.
* We may have been synchronized with a script version that was formerly on
* the stack, but has now been popped.
*/
return cx->options();
}
static unsigned
SetOptionsCommon(JSContext *cx, unsigned options)
{
JS_ASSERT((options & JSOPTION_MASK) == options);
unsigned oldopts = cx->options();
unsigned newopts = options & JSOPTION_MASK;
cx->setOptions(newopts);
cx->updateJITEnabled();
return oldopts;
}
JS_PUBLIC_API(uint32_t)
JS_SetOptions(JSContext *cx, uint32_t options)
{
return SetOptionsCommon(cx, options);
}
JS_PUBLIC_API(uint32_t)
JS_ToggleOptions(JSContext *cx, uint32_t options)
{
unsigned oldopts = cx->options();
unsigned newopts = oldopts ^ options;
return SetOptionsCommon(cx, newopts);
}
JS_PUBLIC_API(void)
JS_SetJitHardening(JSRuntime *rt, JSBool enabled)
{
rt->setJitHardening(!!enabled);
}
JS_PUBLIC_API(const char *)
JS_GetImplementationVersion(void)
{
return "JavaScript-C" MOZILLA_VERSION;
}
JS_PUBLIC_API(void)
JS_SetDestroyCompartmentCallback(JSRuntime *rt, JSDestroyCompartmentCallback callback)
{
rt->destroyCompartmentCallback = callback;
}
JS_PUBLIC_API(void)
JS_SetDestroyZoneCallback(JSRuntime *rt, JSZoneCallback callback)
{
rt->destroyZoneCallback = callback;
}
JS_PUBLIC_API(void)
JS_SetSweepZoneCallback(JSRuntime *rt, JSZoneCallback callback)
{
rt->sweepZoneCallback = callback;
}
JS_PUBLIC_API(void)
JS_SetCompartmentNameCallback(JSRuntime *rt, JSCompartmentNameCallback callback)
{
rt->compartmentNameCallback = callback;
}
JS_PUBLIC_API(JSWrapObjectCallback)
JS_SetWrapObjectCallbacks(JSRuntime *rt,
JSWrapObjectCallback callback,
JSSameCompartmentWrapObjectCallback sccallback,
JSPreWrapCallback precallback)
{
JSWrapObjectCallback old = rt->wrapObjectCallback;
rt->wrapObjectCallback = callback;
rt->sameCompartmentWrapObjectCallback = sccallback;
rt->preWrapObjectCallback = precallback;
return old;
}
JS_PUBLIC_API(JSCompartment *)
JS_EnterCompartment(JSContext *cx, JSObject *target)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSCompartment *oldCompartment = cx->compartment();
cx->enterCompartment(target->compartment());
return oldCompartment;
}
JS_PUBLIC_API(JSCompartment *)
JS_EnterCompartmentOfScript(JSContext *cx, JSScript *target)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
GlobalObject &global = target->global();
return JS_EnterCompartment(cx, &global);
}
JS_PUBLIC_API(void)
JS_LeaveCompartment(JSContext *cx, JSCompartment *oldCompartment)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
cx->leaveCompartment(oldCompartment);
}
JSAutoCompartment::JSAutoCompartment(JSContext *cx, JSObject *target)
: cx_(cx),
oldCompartment_(cx->compartment())
{
AssertHeapIsIdleOrIterating(cx_);
cx_->enterCompartment(target->compartment());
}
JSAutoCompartment::JSAutoCompartment(JSContext *cx, JSScript *target)
: cx_(cx),
oldCompartment_(cx->compartment())
{
AssertHeapIsIdleOrIterating(cx_);
cx_->enterCompartment(target->compartment());
}
JSAutoCompartment::~JSAutoCompartment()
{
cx_->leaveCompartment(oldCompartment_);
}
JS_PUBLIC_API(void)
JS_SetCompartmentPrivate(JSCompartment *compartment, void *data)
{
compartment->data = data;
}
JS_PUBLIC_API(void *)
JS_GetCompartmentPrivate(JSCompartment *compartment)
{
return compartment->data;
}
JS_PUBLIC_API(void)
JS_SetZoneUserData(JS::Zone *zone, void *data)
{
zone->data = data;
}
JS_PUBLIC_API(void *)
JS_GetZoneUserData(JS::Zone *zone)
{
return zone->data;
}
JS_PUBLIC_API(JSBool)
JS_WrapObject(JSContext *cx, JSObject **objp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (*objp)
JS::ExposeGCThingToActiveJS(*objp, JSTRACE_OBJECT);
return cx->compartment()->wrap(cx, objp);
}
JS_PUBLIC_API(JSBool)
JS_WrapValue(JSContext *cx, jsval *vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (vp)
JS::ExposeValueToActiveJS(*vp);
RootedValue value(cx, *vp);
bool ok = cx->compartment()->wrap(cx, &value);
*vp = value.get();
return ok;
}
JS_PUBLIC_API(JSBool)
JS_WrapId(JSContext *cx, jsid *idp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (idp) {
jsid id = *idp;
if (JSID_IS_STRING(id))
JS::ExposeGCThingToActiveJS(JSID_TO_STRING(id), JSTRACE_STRING);
else if (JSID_IS_OBJECT(id))
JS::ExposeGCThingToActiveJS(JSID_TO_OBJECT(id), JSTRACE_OBJECT);
}
return cx->compartment()->wrapId(cx, idp);
}
/*
* Identity remapping. Not for casual consumers.
*
* Normally, an object's contents and its identity are inextricably linked.
* Identity is determined by the address of the JSObject* in the heap, and
* the contents are what is located at that address. Transplanting allows these
* concepts to be separated through a combination of swapping (exchanging the
* contents of two same-compartment objects) and remapping cross-compartment
* identities by altering wrappers.
*
* The |origobj| argument should be the object whose identity needs to be
* remapped, usually to another compartment. The contents of |origobj| are
* destroyed.
*
* The |target| argument serves two purposes:
*
* First, |target| serves as a hint for the new identity of the object. The new
* identity object will always be in the same compartment as |target|, but
* if that compartment already had an object representing |origobj| (either a
* cross-compartment wrapper for it, or |origobj| itself if the two arguments
* are same-compartment), the existing object is used. Otherwise, |target|
* itself is used. To avoid ambiguity, JS_TransplantObject always returns the
* new identity.
*
* Second, the new identity object's contents will be those of |target|. A swap()
* is used to make this happen if an object other than |target| is used.
*
* We don't have a good way to recover from failure in this function, so
* we intentionally crash instead.
*/
JS_PUBLIC_API(JSObject *)
JS_TransplantObject(JSContext *cx, HandleObject origobj, HandleObject target)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
JS_ASSERT(origobj != target);
JS_ASSERT(!IsCrossCompartmentWrapper(origobj));
JS_ASSERT(!IsCrossCompartmentWrapper(target));
AutoMaybeTouchDeadZones agc(cx);
AutoDisableProxyCheck adpc(cx->runtime());
JSCompartment *destination = target->compartment();
RootedValue origv(cx, ObjectValue(*origobj));
RootedObject newIdentity(cx);
if (origobj->compartment() == destination) {
// If the original object is in the same compartment as the
// destination, then we know that we won't find a wrapper in the
// destination's cross compartment map and that the same
// object will continue to work.
if (!JSObject::swap(cx, origobj, target))
MOZ_CRASH();
newIdentity = origobj;
} else if (WrapperMap::Ptr p = destination->lookupWrapper(origv)) {
// There might already be a wrapper for the original object in
// the new compartment. If there is, we use its identity and swap
// in the contents of |target|.
newIdentity = &p->value.toObject();
// When we remove origv from the wrapper map, its wrapper, newIdentity,
// must immediately cease to be a cross-compartment wrapper. Neuter it.
destination->removeWrapper(p);
NukeCrossCompartmentWrapper(cx, newIdentity);
if (!JSObject::swap(cx, newIdentity, target))
MOZ_CRASH();
} else {
// Otherwise, we use |target| for the new identity object.
newIdentity = target;
}
// Now, iterate through other scopes looking for references to the
// old object, and update the relevant cross-compartment wrappers.
if (!RemapAllWrappersForObject(cx, origobj, newIdentity))
MOZ_CRASH();
// Lastly, update the original object to point to the new one.
if (origobj->compartment() != destination) {
RootedObject newIdentityWrapper(cx, newIdentity);
AutoCompartment ac(cx, origobj);
if (!JS_WrapObject(cx, newIdentityWrapper.address()))
MOZ_CRASH();
JS_ASSERT(Wrapper::wrappedObject(newIdentityWrapper) == newIdentity);
if (!JSObject::swap(cx, origobj, newIdentityWrapper))
MOZ_CRASH();
origobj->compartment()->putWrapper(ObjectValue(*newIdentity), origv);
}
// The new identity object might be one of several things. Return it to avoid
// ambiguity.
return newIdentity;
}
/*
* Recompute all cross-compartment wrappers for an object, resetting state.
* Gecko uses this to clear Xray wrappers when doing a navigation that reuses
* the inner window and global object.
*/
JS_PUBLIC_API(JSBool)
JS_RefreshCrossCompartmentWrappers(JSContext *cx, JSObject *objArg)
{
RootedObject obj(cx, objArg);
return RemapAllWrappersForObject(cx, obj, obj);
}
JS_PUBLIC_API(void)
JS_SetGlobalObject(JSContext *cx, JSObject *obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
cx->setDefaultCompartmentObject(obj);
}
JS_PUBLIC_API(JSBool)
JS_InitStandardClasses(JSContext *cx, JSObject *objArg)
{
RootedObject obj(cx, objArg);
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
cx->setDefaultCompartmentObjectIfUnset(obj);
assertSameCompartment(cx, obj);
Rooted<GlobalObject*> global(cx, &obj->global());
return GlobalObject::initStandardClasses(cx, global);
}
#define CLASP(name) (&name##Class)
#define OCLASP(name) (&name##Object::class_)
#define TYPED_ARRAY_CLASP(type) (&TypedArray::classes[TypedArray::type])
#define EAGER_ATOM(name) NAME_OFFSET(name)
#define EAGER_CLASS_ATOM(name) NAME_OFFSET(name)
#define EAGER_ATOM_AND_CLASP(name) EAGER_CLASS_ATOM(name), CLASP(name)
#define EAGER_ATOM_AND_OCLASP(name) EAGER_CLASS_ATOM(name), OCLASP(name)
typedef struct JSStdName {
JSClassInitializerOp init;
size_t atomOffset; /* offset of atom pointer in JSAtomState */
Class *clasp;
} JSStdName;
static Handle<PropertyName*>
StdNameToPropertyName(JSContext *cx, const JSStdName *stdn)
{
return OFFSET_TO_NAME(cx->runtime(), stdn->atomOffset);
}
/*
* Table of class initializers and their atom offsets in rt->atomState.
* If you add a "standard" class, remember to update this table.
*/
static const JSStdName standard_class_atoms[] = {
{js_InitFunctionClass, EAGER_CLASS_ATOM(Function), &JSFunction::class_},
{js_InitObjectClass, EAGER_ATOM_AND_CLASP(Object)},
{js_InitArrayClass, EAGER_ATOM_AND_CLASP(Array)},
{js_InitBooleanClass, EAGER_ATOM_AND_OCLASP(Boolean)},
{js_InitDateClass, EAGER_ATOM_AND_CLASP(Date)},
{js_InitMathClass, EAGER_ATOM_AND_CLASP(Math)},
{js_InitNumberClass, EAGER_ATOM_AND_OCLASP(Number)},
{js_InitStringClass, EAGER_ATOM_AND_OCLASP(String)},
{js_InitExceptionClasses, EAGER_ATOM_AND_CLASP(Error)},
{js_InitRegExpClass, EAGER_ATOM_AND_OCLASP(RegExp)},
#if JS_HAS_GENERATORS
{js_InitIteratorClasses, EAGER_ATOM_AND_OCLASP(StopIteration)},
#endif
{js_InitJSONClass, EAGER_ATOM_AND_CLASP(JSON)},
{js_InitTypedArrayClasses, EAGER_CLASS_ATOM(ArrayBuffer), &js::ArrayBufferObject::protoClass},
{js_InitWeakMapClass, EAGER_ATOM_AND_OCLASP(WeakMap)},
{js_InitMapClass, EAGER_ATOM_AND_OCLASP(Map)},
{js_InitSetClass, EAGER_ATOM_AND_OCLASP(Set)},
#ifdef ENABLE_PARALLEL_JS
{js_InitParallelArrayClass, EAGER_ATOM_AND_OCLASP(ParallelArray)},
#endif
{js_InitProxyClass, EAGER_ATOM_AND_CLASP(Proxy)},
#if ENABLE_INTL_API
{js_InitIntlClass, EAGER_ATOM_AND_CLASP(Intl)},
#endif
{NULL, 0, NULL}
};
/*
* Table of top-level function and constant names and their init functions.
* If you add a "standard" global function or property, remember to update
* this table.
*/
static const JSStdName standard_class_names[] = {
{js_InitObjectClass, EAGER_ATOM(eval), CLASP(Object)},
/* Global properties and functions defined by the Number class. */
{js_InitNumberClass, EAGER_ATOM(NaN), OCLASP(Number)},
{js_InitNumberClass, EAGER_ATOM(Infinity), OCLASP(Number)},
{js_InitNumberClass, EAGER_ATOM(isNaN), OCLASP(Number)},
{js_InitNumberClass, EAGER_ATOM(isFinite), OCLASP(Number)},
{js_InitNumberClass, EAGER_ATOM(parseFloat), OCLASP(Number)},
{js_InitNumberClass, EAGER_ATOM(parseInt), OCLASP(Number)},
/* String global functions. */
{js_InitStringClass, EAGER_ATOM(escape), OCLASP(String)},
{js_InitStringClass, EAGER_ATOM(unescape), OCLASP(String)},
{js_InitStringClass, EAGER_ATOM(decodeURI), OCLASP(String)},
{js_InitStringClass, EAGER_ATOM(encodeURI), OCLASP(String)},
{js_InitStringClass, EAGER_ATOM(decodeURIComponent), OCLASP(String)},
{js_InitStringClass, EAGER_ATOM(encodeURIComponent), OCLASP(String)},
#if JS_HAS_UNEVAL
{js_InitStringClass, EAGER_ATOM(uneval), OCLASP(String)},
#endif
/* Exception constructors. */
{js_InitExceptionClasses, EAGER_CLASS_ATOM(Error), CLASP(Error)},
{js_InitExceptionClasses, EAGER_CLASS_ATOM(InternalError), CLASP(Error)},
{js_InitExceptionClasses, EAGER_CLASS_ATOM(EvalError), CLASP(Error)},
{js_InitExceptionClasses, EAGER_CLASS_ATOM(RangeError), CLASP(Error)},
{js_InitExceptionClasses, EAGER_CLASS_ATOM(ReferenceError), CLASP(Error)},
{js_InitExceptionClasses, EAGER_CLASS_ATOM(SyntaxError), CLASP(Error)},
{js_InitExceptionClasses, EAGER_CLASS_ATOM(TypeError), CLASP(Error)},
{js_InitExceptionClasses, EAGER_CLASS_ATOM(URIError), CLASP(Error)},
{js_InitIteratorClasses, EAGER_CLASS_ATOM(Iterator), &PropertyIteratorObject::class_},
/* Typed Arrays */
{js_InitTypedArrayClasses, EAGER_CLASS_ATOM(ArrayBuffer), &ArrayBufferObject::class_},
{js_InitTypedArrayClasses, EAGER_CLASS_ATOM(Int8Array), TYPED_ARRAY_CLASP(TYPE_INT8)},
{js_InitTypedArrayClasses, EAGER_CLASS_ATOM(Uint8Array), TYPED_ARRAY_CLASP(TYPE_UINT8)},
{js_InitTypedArrayClasses, EAGER_CLASS_ATOM(Int16Array), TYPED_ARRAY_CLASP(TYPE_INT16)},
{js_InitTypedArrayClasses, EAGER_CLASS_ATOM(Uint16Array), TYPED_ARRAY_CLASP(TYPE_UINT16)},
{js_InitTypedArrayClasses, EAGER_CLASS_ATOM(Int32Array), TYPED_ARRAY_CLASP(TYPE_INT32)},
{js_InitTypedArrayClasses, EAGER_CLASS_ATOM(Uint32Array), TYPED_ARRAY_CLASP(TYPE_UINT32)},
{js_InitTypedArrayClasses, EAGER_CLASS_ATOM(Float32Array), TYPED_ARRAY_CLASP(TYPE_FLOAT32)},
{js_InitTypedArrayClasses, EAGER_CLASS_ATOM(Float64Array), TYPED_ARRAY_CLASP(TYPE_FLOAT64)},
{js_InitTypedArrayClasses, EAGER_CLASS_ATOM(Uint8ClampedArray),
TYPED_ARRAY_CLASP(TYPE_UINT8_CLAMPED)},
{js_InitTypedArrayClasses, EAGER_CLASS_ATOM(DataView), &DataViewObject::class_},
{NULL, 0, NULL}
};
static const JSStdName object_prototype_names[] = {
/* Object.prototype properties (global delegates to Object.prototype). */
{js_InitObjectClass, EAGER_ATOM(proto), CLASP(Object)},
#if JS_HAS_TOSOURCE
{js_InitObjectClass, EAGER_ATOM(toSource), CLASP(Object)},
#endif
{js_InitObjectClass, EAGER_ATOM(toString), CLASP(Object)},
{js_InitObjectClass, EAGER_ATOM(toLocaleString), CLASP(Object)},
{js_InitObjectClass, EAGER_ATOM(valueOf), CLASP(Object)},
#if JS_HAS_OBJ_WATCHPOINT
{js_InitObjectClass, EAGER_ATOM(watch), CLASP(Object)},
{js_InitObjectClass, EAGER_ATOM(unwatch), CLASP(Object)},
#endif
{js_InitObjectClass, EAGER_ATOM(hasOwnProperty), CLASP(Object)},
{js_InitObjectClass, EAGER_ATOM(isPrototypeOf), CLASP(Object)},
{js_InitObjectClass, EAGER_ATOM(propertyIsEnumerable), CLASP(Object)},
#if OLD_GETTER_SETTER_METHODS
{js_InitObjectClass, EAGER_ATOM(defineGetter), CLASP(Object)},
{js_InitObjectClass, EAGER_ATOM(defineSetter), CLASP(Object)},
{js_InitObjectClass, EAGER_ATOM(lookupGetter), CLASP(Object)},
{js_InitObjectClass, EAGER_ATOM(lookupSetter), CLASP(Object)},
#endif
{NULL, 0, NULL}
};
#undef CLASP
#undef TYPED_ARRAY_CLASP
#undef EAGER_ATOM
#undef EAGER_CLASS_ATOM
#undef EAGER_ATOM_AND_CLASP
JS_PUBLIC_API(JSBool)
JS_ResolveStandardClass(JSContext *cx, HandleObject obj, HandleId id, JSBool *resolved)
{
TRACK_MEMORY_SCOPE("Javascript");
JSRuntime *rt;
JSAtom *atom;
const JSStdName *stdnm;
unsigned i;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
*resolved = false;
rt = cx->runtime();
if (!rt->hasContexts() || !JSID_IS_ATOM(id))
return true;
RootedString idstr(cx, JSID_TO_STRING(id));
/* Check whether we're resolving 'undefined', and define it if so. */
atom = rt->atomState.undefined;
if (idstr == atom) {
*resolved = true;
RootedValue undefinedValue(cx, UndefinedValue());
return JSObject::defineProperty(cx, obj, atom->asPropertyName(), undefinedValue,
JS_PropertyStub, JS_StrictPropertyStub,
JSPROP_PERMANENT | JSPROP_READONLY);
}
/* Try for class constructors/prototypes named by well-known atoms. */
stdnm = NULL;
for (i = 0; standard_class_atoms[i].init; i++) {
JS_ASSERT(standard_class_atoms[i].clasp);
atom = OFFSET_TO_NAME(rt, standard_class_atoms[i].atomOffset);
if (idstr == atom) {
stdnm = &standard_class_atoms[i];
break;
}
}
if (!stdnm) {
/* Try less frequently used top-level functions and constants. */
for (i = 0; standard_class_names[i].init; i++) {
JS_ASSERT(standard_class_names[i].clasp);
atom = StdNameToPropertyName(cx, &standard_class_names[i]);
if (!atom)
return false;
if (idstr == atom) {
stdnm = &standard_class_names[i];
break;
}
}
RootedObject proto(cx);
if (!JSObject::getProto(cx, obj, &proto))
return false;
if (!stdnm && !proto) {
/*
* Try even less frequently used names delegated from the global
* object to Object.prototype, but only if the Object class hasn't
* yet been initialized.
*/
for (i = 0; object_prototype_names[i].init; i++) {
JS_ASSERT(object_prototype_names[i].clasp);
atom = StdNameToPropertyName(cx, &object_prototype_names[i]);
if (!atom)
return false;
if (idstr == atom) {
stdnm = &object_prototype_names[i];
break;
}
}
}
}
if (stdnm) {
/*
* If this standard class is anonymous, then we don't want to resolve
* by name.
*/
JS_ASSERT(obj->is<GlobalObject>());
if (stdnm->clasp->flags & JSCLASS_IS_ANONYMOUS)
return true;
if (IsStandardClassResolved(obj, stdnm->clasp))
return true;
if (!stdnm->init(cx, obj))
return false;
*resolved = true;
}
return true;
}
JS_PUBLIC_API(JSBool)
JS_EnumerateStandardClasses(JSContext *cx, HandleObject obj)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
/*
* Check whether we need to bind 'undefined' and define it if so.
* Since ES5 15.1.1.3 undefined can't be deleted.
*/
HandlePropertyName undefinedName = cx->names().undefined;
RootedValue undefinedValue(cx, UndefinedValue());
if (!obj->nativeContains(cx, undefinedName) &&
!JSObject::defineProperty(cx, obj, undefinedName, undefinedValue,
JS_PropertyStub, JS_StrictPropertyStub,
JSPROP_PERMANENT | JSPROP_READONLY)) {
return false;
}
/* Initialize any classes that have not been initialized yet. */
for (unsigned i = 0; standard_class_atoms[i].init; i++) {
const JSStdName &stdnm = standard_class_atoms[i];
if (!js::IsStandardClassResolved(obj, stdnm.clasp)) {
if (!stdnm.init(cx, obj))
return false;
}
}
return true;
}
JS_PUBLIC_API(JSBool)
JS_GetClassObject(JSContext *cx, JSObject *obj, JSProtoKey key, JSObject **objpArg)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject objp(cx, *objpArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
if (!js_GetClassObject(cx, obj, key, &objp))
return false;
*objpArg = objp;
return true;
}
JS_PUBLIC_API(JSBool)
JS_GetClassPrototype(JSContext *cx, JSProtoKey key, JSObject **objp_)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedObject objp(cx);
bool result = js_GetClassPrototype(cx, key, &objp);
*objp_ = objp;
return result;
}
JS_PUBLIC_API(JSProtoKey)
JS_IdentifyClassPrototype(JSContext *cx, JSObject *obj)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JS_ASSERT(!IsCrossCompartmentWrapper(obj));
return js_IdentifyClassPrototype(obj);
}
JS_PUBLIC_API(JSObject *)
JS_GetObjectPrototype(JSContext *cx, JSObject *forObj)
{
CHECK_REQUEST(cx);
assertSameCompartment(cx, forObj);
return forObj->global().getOrCreateObjectPrototype(cx);
}
JS_PUBLIC_API(JSObject *)
JS_GetFunctionPrototype(JSContext *cx, JSObject *forObj)
{
CHECK_REQUEST(cx);
assertSameCompartment(cx, forObj);
return forObj->global().getOrCreateFunctionPrototype(cx);
}
JS_PUBLIC_API(JSObject *)
JS_GetArrayPrototype(JSContext *cx, JSObject *forObj)
{
CHECK_REQUEST(cx);
assertSameCompartment(cx, forObj);
return forObj->global().getOrCreateArrayPrototype(cx);
}
JS_PUBLIC_API(JSObject *)
JS_GetGlobalForObject(JSContext *cx, JSObject *obj)
{
AssertHeapIsIdle(cx);
assertSameCompartment(cx, obj);
return &obj->global();
}
extern JS_PUBLIC_API(JSBool)
JS_IsGlobalObject(JSObject *obj)
{
return obj->is<GlobalObject>();
}
JS_PUBLIC_API(JSObject *)
JS_GetGlobalForCompartmentOrNull(JSContext *cx, JSCompartment *c)
{
AssertHeapIsIdleOrIterating(cx);
assertSameCompartment(cx, c);
return c->maybeGlobal();
}
JS_PUBLIC_API(JSObject *)
JS_GetGlobalForScopeChain(JSContext *cx)
{
AssertHeapIsIdleOrIterating(cx);
CHECK_REQUEST(cx);
if (!cx->compartment())
return NULL;
return cx->global();
}
JS_PUBLIC_API(jsval)
JS_ComputeThis(JSContext *cx, jsval *vp)
{
AssertHeapIsIdle(cx);
assertSameCompartment(cx, JSValueArray(vp, 2));
CallReceiver call = CallReceiverFromVp(vp);
if (!BoxNonStrictThis(cx, call))
return JSVAL_NULL;
return call.thisv();
}
JS_PUBLIC_API(void *)
JS_malloc(JSContext *cx, size_t nbytes)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return cx->malloc_(nbytes);
}
JS_PUBLIC_API(void *)
JS_realloc(JSContext *cx, void *p, size_t nbytes)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return cx->realloc_(p, nbytes);
}
JS_PUBLIC_API(void)
JS_free(JSContext *cx, void *p)
{
return js_free(p);
}
JS_PUBLIC_API(void)
JS_freeop(JSFreeOp *fop, void *p)
{
return FreeOp::get(fop)->free_(p);
}
JS_PUBLIC_API(JSFreeOp *)
JS_GetDefaultFreeOp(JSRuntime *rt)
{
return rt->defaultFreeOp();
}
JS_PUBLIC_API(void)
JS_updateMallocCounter(JSContext *cx, size_t nbytes)
{
return cx->runtime()->updateMallocCounter(cx->zone(), nbytes);
}
JS_PUBLIC_API(char *)
JS_strdup(JSContext *cx, const char *s)
{
AssertHeapIsIdle(cx);
size_t n = strlen(s) + 1;
void *p = cx->malloc_(n);
if (!p)
return NULL;
return (char *)js_memcpy(p, s, n);
}
JS_PUBLIC_API(char *)
JS_strdup(JSRuntime *rt, const char *s)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(rt);
size_t n = strlen(s) + 1;
void *p = rt->malloc_(n);
if (!p)
return NULL;
return static_cast<char*>(js_memcpy(p, s, n));
}
#undef JS_AddRoot
JS_PUBLIC_API(JSBool)
JS_AddValueRoot(JSContext *cx, jsval *vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return AddValueRoot(cx, vp, NULL);
}
JS_PUBLIC_API(JSBool)
JS_AddStringRoot(JSContext *cx, JSString **rp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return AddStringRoot(cx, rp, NULL);
}
JS_PUBLIC_API(JSBool)
JS_AddObjectRoot(JSContext *cx, JSObject **rp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return AddObjectRoot(cx, rp, NULL);
}
JS_PUBLIC_API(JSBool)
JS_AddNamedValueRoot(JSContext *cx, jsval *vp, const char *name)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return AddValueRoot(cx, vp, name);
}
JS_PUBLIC_API(JSBool)
JS_AddNamedValueRootRT(JSRuntime *rt, jsval *vp, const char *name)
{
return AddValueRootRT(rt, vp, name);
}
JS_PUBLIC_API(JSBool)
JS_AddNamedStringRoot(JSContext *cx, JSString **rp, const char *name)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return AddStringRoot(cx, rp, name);
}
JS_PUBLIC_API(JSBool)
JS_AddNamedObjectRoot(JSContext *cx, JSObject **rp, const char *name)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return AddObjectRoot(cx, rp, name);
}
JS_PUBLIC_API(JSBool)
JS_AddNamedScriptRoot(JSContext *cx, JSScript **rp, const char *name)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return AddScriptRoot(cx, rp, name);
}
/* We allow unrooting from finalizers within the GC */
JS_PUBLIC_API(void)
JS_RemoveValueRoot(JSContext *cx, jsval *vp)
{
CHECK_REQUEST(cx);
js_RemoveRoot(cx->runtime(), (void *)vp);
}
JS_PUBLIC_API(void)
JS_RemoveStringRoot(JSContext *cx, JSString **rp)
{
CHECK_REQUEST(cx);
js_RemoveRoot(cx->runtime(), (void *)rp);
}
JS_PUBLIC_API(void)
JS_RemoveObjectRoot(JSContext *cx, JSObject **rp)
{
CHECK_REQUEST(cx);
js_RemoveRoot(cx->runtime(), (void *)rp);
}
JS_PUBLIC_API(void)
JS_RemoveScriptRoot(JSContext *cx, JSScript **rp)
{
CHECK_REQUEST(cx);
js_RemoveRoot(cx->runtime(), (void *)rp);
}
JS_PUBLIC_API(void)
JS_RemoveValueRootRT(JSRuntime *rt, jsval *vp)
{
js_RemoveRoot(rt, (void *)vp);
}
JS_PUBLIC_API(void)
JS_RemoveStringRootRT(JSRuntime *rt, JSString **rp)
{
js_RemoveRoot(rt, (void *)rp);
}
JS_PUBLIC_API(void)
JS_RemoveObjectRootRT(JSRuntime *rt, JSObject **rp)
{
js_RemoveRoot(rt, (void *)rp);
}
JS_PUBLIC_API(void)
JS_RemoveScriptRootRT(JSRuntime *rt, JSScript **rp)
{
js_RemoveRoot(rt, (void *)rp);
}
JS_NEVER_INLINE JS_PUBLIC_API(void)
JS_AnchorPtr(void *p)
{
}
JS_PUBLIC_API(JSBool)
JS_AddExtraGCRootsTracer(JSRuntime *rt, JSTraceDataOp traceOp, void *data)
{
AssertHeapIsIdle(rt);
return !!rt->gcBlackRootTracers.append(JSRuntime::ExtraTracer(traceOp, data));
}
JS_PUBLIC_API(void)
JS_RemoveExtraGCRootsTracer(JSRuntime *rt, JSTraceDataOp traceOp, void *data)
{
AssertHeapIsIdle(rt);
for (size_t i = 0; i < rt->gcBlackRootTracers.length(); i++) {
JSRuntime::ExtraTracer *e = &rt->gcBlackRootTracers[i];
if (e->op == traceOp && e->data == data) {
rt->gcBlackRootTracers.erase(e);
break;
}
}
}
JS_PUBLIC_API(void)
JS_CallValueTracer(JSTracer *trc, Value *valuep, const char *name)
{
MarkValueUnbarriered(trc, valuep, name);
}
JS_PUBLIC_API(void)
JS_CallIdTracer(JSTracer *trc, jsid *idp, const char *name)
{
MarkIdUnbarriered(trc, idp, name);
}
JS_PUBLIC_API(void)
JS_CallObjectTracer(JSTracer *trc, JSObject **objp, const char *name)
{
MarkObjectUnbarriered(trc, objp, name);
}
JS_PUBLIC_API(void)
JS_CallMaskedObjectTracer(JSTracer *trc, uintptr_t *objp, uintptr_t flagMask, const char *name)
{
uintptr_t flags = *objp & flagMask;
JSObject *obj = reinterpret_cast<JSObject *>(*objp & ~flagMask);
if (!obj)
return;
JS_SET_TRACING_LOCATION(trc, (void*)objp);
MarkObjectUnbarriered(trc, &obj, name);
*objp = uintptr_t(obj) | flags;
}
JS_PUBLIC_API(void)
JS_CallStringTracer(JSTracer *trc, JSString **strp, const char *name)
{
MarkStringUnbarriered(trc, strp, name);
}
JS_PUBLIC_API(void)
JS_CallScriptTracer(JSTracer *trc, JSScript **scriptp, const char *name)
{
MarkScriptUnbarriered(trc, scriptp, name);
}
JS_PUBLIC_API(void)
JS_CallGenericTracer(JSTracer *trc, void *gcthingArg, const char *name)
{
void *gcthing = gcthingArg;
JSGCTraceKind kind = gc::GetGCThingTraceKind(gcthing);
JS_SET_TRACING_NAME(trc, name);
MarkKind(trc, &gcthing, kind);
JS_ASSERT(gcthing == gcthingArg);
}
JS_PUBLIC_API(void)
JS_CallHeapValueTracer(JSTracer *trc, JS::Heap<JS::Value> *valuep, const char *name)
{
MarkValueUnbarriered(trc, valuep->unsafeGet(), name);
}
JS_PUBLIC_API(void)
JS_CallHeapIdTracer(JSTracer *trc, JS::Heap<jsid> *idp, const char *name)
{
MarkIdUnbarriered(trc, idp->unsafeGet(), name);
}
JS_PUBLIC_API(void)
JS_CallHeapObjectTracer(JSTracer *trc, JS::Heap<JSObject *> *objp, const char *name)
{
MarkObjectUnbarriered(trc, objp->unsafeGet(), name);
}
JS_PUBLIC_API(void)
JS_CallHeapStringTracer(JSTracer *trc, JS::Heap<JSString *> *strp, const char *name)
{
MarkStringUnbarriered(trc, strp->unsafeGet(), name);
}
JS_PUBLIC_API(void)
JS_CallHeapScriptTracer(JSTracer *trc, JS::Heap<JSScript *> *scriptp, const char *name)
{
MarkScriptUnbarriered(trc, scriptp->unsafeGet(), name);
}
JS_PUBLIC_API(void)
JS_TracerInit(JSTracer *trc, JSRuntime *rt, JSTraceCallback callback)
{
InitTracer(trc, rt, callback);
}
JS_PUBLIC_API(void)
JS_TraceRuntime(JSTracer *trc)
{
AssertHeapIsIdle(trc->runtime);
TraceRuntime(trc);
}
JS_PUBLIC_API(void)
JS_TraceChildren(JSTracer *trc, void *thing, JSGCTraceKind kind)
{
js::TraceChildren(trc, thing, kind);
}
JS_PUBLIC_API(void)
JS_GetTraceThingInfo(char *buf, size_t bufsize, JSTracer *trc, void *thing,
JSGCTraceKind kind, JSBool details)
{
const char *name = NULL; /* silence uninitialized warning */
size_t n;
if (bufsize == 0)
return;
switch (kind) {
case JSTRACE_OBJECT:
{
name = static_cast<JSObject *>(thing)->getClass()->name;
break;
}
case JSTRACE_STRING:
name = ((JSString *)thing)->isDependent()
? "substring"
: "string";
break;
case JSTRACE_SCRIPT:
name = "script";
break;
case JSTRACE_LAZY_SCRIPT:
name = "lazyscript";
break;
case JSTRACE_IONCODE:
name = "ioncode";
break;
case JSTRACE_SHAPE:
name = "shape";
break;
case JSTRACE_BASE_SHAPE:
name = "base_shape";
break;
case JSTRACE_TYPE_OBJECT:
name = "type_object";
break;
}
n = strlen(name);
if (n > bufsize - 1)
n = bufsize - 1;
js_memcpy(buf, name, n + 1);
buf += n;
bufsize -= n;
*buf = '\0';
if (details && bufsize > 2) {
switch (kind) {
case JSTRACE_OBJECT:
{
JSObject *obj = (JSObject *)thing;
if (obj->is<JSFunction>()) {
JSFunction *fun = &obj->as<JSFunction>();
if (fun->displayAtom()) {
*buf++ = ' ';
bufsize--;
PutEscapedString(buf, bufsize, fun->displayAtom(), 0);
}
} else if (obj->getClass()->flags & JSCLASS_HAS_PRIVATE) {
JS_snprintf(buf, bufsize, " %p", obj->getPrivate());
} else {
JS_snprintf(buf, bufsize, " <no private>");
}
break;
}
case JSTRACE_STRING:
{
*buf++ = ' ';
bufsize--;
JSString *str = (JSString *)thing;
if (str->isLinear())
PutEscapedString(buf, bufsize, &str->asLinear(), 0);
else
JS_snprintf(buf, bufsize, "<rope: length %d>", (int)str->length());
break;
}
case JSTRACE_SCRIPT:
{
JSScript *script = static_cast<JSScript *>(thing);
JS_snprintf(buf, bufsize, " %s:%u", script->filename(), unsigned(script->lineno));
break;
}
case JSTRACE_LAZY_SCRIPT:
case JSTRACE_IONCODE:
case JSTRACE_SHAPE:
case JSTRACE_BASE_SHAPE:
case JSTRACE_TYPE_OBJECT:
break;
}
}
buf[bufsize - 1] = '\0';
}
extern JS_PUBLIC_API(const char *)
JS_GetTraceEdgeName(JSTracer *trc, char *buffer, int bufferSize)
{
if (trc->debugPrinter) {
trc->debugPrinter(trc, buffer, bufferSize);
return buffer;
}
if (trc->debugPrintIndex != (size_t) - 1) {
JS_snprintf(buffer, bufferSize, "%s[%lu]",
(const char *)trc->debugPrintArg,
trc->debugPrintIndex);
return buffer;
}
return (const char*)trc->debugPrintArg;
}
#ifdef DEBUG
typedef struct JSHeapDumpNode JSHeapDumpNode;
struct JSHeapDumpNode {
void *thing;
JSGCTraceKind kind;
JSHeapDumpNode *next; /* next sibling */
JSHeapDumpNode *parent; /* node with the thing that refer to thing
from this node */
char edgeName[1]; /* name of the edge from parent->thing
into thing */
};
typedef HashSet<void *, PointerHasher<void *, 3>, SystemAllocPolicy> VisitedSet;
typedef struct JSDumpingTracer {
JSTracer base;
VisitedSet visited;
bool ok;
void *startThing;
void *thingToFind;
void *thingToIgnore;
JSHeapDumpNode *parentNode;
JSHeapDumpNode **lastNodep;
char buffer[200];
} JSDumpingTracer;
static void
DumpNotify(JSTracer *trc, void **thingp, JSGCTraceKind kind)
{
JS_ASSERT(trc->callback == DumpNotify);
JSDumpingTracer *dtrc = (JSDumpingTracer *)trc;
void *thing = *thingp;
if (!dtrc->ok || thing == dtrc->thingToIgnore)
return;
/*
* Check if we have already seen thing unless it is thingToFind to include
* it to the graph each time we reach it and print all live things that
* refer to thingToFind.
*
* This does not print all possible paths leading to thingToFind since
* when a thing A refers directly or indirectly to thingToFind and A is
* present several times in the graph, we will print only the first path
* leading to A and thingToFind, other ways to reach A will be ignored.
*/
if (dtrc->thingToFind != thing) {
/*
* The startThing check allows to avoid putting startThing into the
* hash table before tracing startThing in JS_DumpHeap.
*/
if (thing == dtrc->startThing)
return;
VisitedSet::AddPtr p = dtrc->visited.lookupForAdd(thing);
if (p)
return;
if (!dtrc->visited.add(p, thing)) {
dtrc->ok = false;
return;
}
}
const char *edgeName = JS_GetTraceEdgeName(&dtrc->base, dtrc->buffer, sizeof(dtrc->buffer));
size_t edgeNameSize = strlen(edgeName) + 1;
size_t bytes = offsetof(JSHeapDumpNode, edgeName) + edgeNameSize;
JSHeapDumpNode *node = (JSHeapDumpNode *) js_malloc(bytes);
if (!node) {
dtrc->ok = false;
return;
}
node->thing = thing;
node->kind = kind;
node->next = NULL;
node->parent = dtrc->parentNode;
js_memcpy(node->edgeName, edgeName, edgeNameSize);
JS_ASSERT(!*dtrc->lastNodep);
*dtrc->lastNodep = node;
dtrc->lastNodep = &node->next;
}
/* Dump node and the chain that leads to thing it contains. */
static JSBool
DumpNode(JSDumpingTracer *dtrc, FILE* fp, JSHeapDumpNode *node)
{
JSHeapDumpNode *prev, *following;
size_t chainLimit;
enum { MAX_PARENTS_TO_PRINT = 10 };
JS_GetTraceThingInfo(dtrc->buffer, sizeof dtrc->buffer,
&dtrc->base, node->thing, node->kind, JS_TRUE);
if (fprintf(fp, "%p %-22s via ", node->thing, dtrc->buffer) < 0)
return JS_FALSE;
/*
* We need to print the parent chain in the reverse order. To do it in
* O(N) time where N is the chain length we first reverse the chain while
* searching for the top and then print each node while restoring the
* chain order.
*/
chainLimit = MAX_PARENTS_TO_PRINT;
prev = NULL;
for (;;) {
following = node->parent;
node->parent = prev;
prev = node;
node = following;
if (!node)
break;
if (chainLimit == 0) {
if (fputs("...", fp) < 0)
return JS_FALSE;
break;
}
--chainLimit;
}
node = prev;
prev = following;
bool ok = true;
do {
/* Loop must continue even when !ok to restore the parent chain. */
if (ok) {
if (!prev) {
/* Print edge from some runtime root or startThing. */
if (fputs(node->edgeName, fp) < 0)
ok = false;
} else {
JS_GetTraceThingInfo(dtrc->buffer, sizeof dtrc->buffer,
&dtrc->base, prev->thing, prev->kind,
JS_FALSE);
if (fprintf(fp, "(%p %s).%s",
prev->thing, dtrc->buffer, node->edgeName) < 0) {
ok = false;
}
}
}
following = node->parent;
node->parent = prev;
prev = node;
node = following;
} while (node);
return ok && putc('\n', fp) >= 0;
}
JS_PUBLIC_API(JSBool)
JS_DumpHeap(JSRuntime *rt, FILE *fp, void* startThing, JSGCTraceKind startKind,
void *thingToFind, size_t maxDepth, void *thingToIgnore)
{
if (maxDepth == 0)
return true;
JSDumpingTracer dtrc;
if (!dtrc.visited.init())
return false;
JS_TracerInit(&dtrc.base, rt, DumpNotify);
dtrc.ok = true;
dtrc.startThing = startThing;
dtrc.thingToFind = thingToFind;
dtrc.thingToIgnore = thingToIgnore;
dtrc.parentNode = NULL;
JSHeapDumpNode *node = NULL;
dtrc.lastNodep = &node;
if (!startThing) {
JS_ASSERT(startKind == JSTRACE_OBJECT);
TraceRuntime(&dtrc.base);
} else {
JS_TraceChildren(&dtrc.base, startThing, startKind);
}
if (!node)
return dtrc.ok;
size_t depth = 1;
JSHeapDumpNode *children, *next, *parent;
bool thingToFindWasTraced = thingToFind && thingToFind == startThing;
for (;;) {
/*
* Loop must continue even when !dtrc.ok to free all nodes allocated
* so far.
*/
if (dtrc.ok) {
if (thingToFind == NULL || thingToFind == node->thing)
dtrc.ok = DumpNode(&dtrc, fp, node);
/* Descend into children. */
if (dtrc.ok &&
depth < maxDepth &&
(thingToFind != node->thing || !thingToFindWasTraced)) {
dtrc.parentNode = node;
children = NULL;
dtrc.lastNodep = &children;
JS_TraceChildren(&dtrc.base, node->thing, node->kind);
if (thingToFind == node->thing)
thingToFindWasTraced = JS_TRUE;
if (children != NULL) {
++depth;
node = children;
continue;
}
}
}
/* Move to next or parents next and free the node. */
for (;;) {
next = node->next;
parent = node->parent;
js_free(node);
node = next;
if (node)
break;
if (!parent)
return dtrc.ok;
JS_ASSERT(depth > 1);
--depth;
node = parent;
}
}
JS_ASSERT(depth == 1);
return dtrc.ok;
}
#endif /* DEBUG */
extern JS_PUBLIC_API(JSBool)
JS_IsGCMarkingTracer(JSTracer *trc)
{
return IS_GC_MARKING_TRACER(trc);
}
JS_PUBLIC_API(void)
JS_GC(JSRuntime *rt)
{
AssertHeapIsIdle(rt);
JS::PrepareForFullGC(rt);
GC(rt, GC_NORMAL, JS::gcreason::API);
}
JS_PUBLIC_API(void)
JS_MaybeGC(JSContext *cx)
{
MaybeGC(cx);
}
JS_PUBLIC_API(void)
JS_SetGCCallback(JSRuntime *rt, JSGCCallback cb)
{
AssertHeapIsIdle(rt);
rt->gcCallback = cb;
}
JS_PUBLIC_API(void)
JS_SetFinalizeCallback(JSRuntime *rt, JSFinalizeCallback cb)
{
AssertHeapIsIdle(rt);
rt->gcFinalizeCallback = cb;
}
JS_PUBLIC_API(JSBool)
JS_IsAboutToBeFinalized(JSObject **obj)
{
return IsObjectAboutToBeFinalized(obj);
}
JS_PUBLIC_API(void)
JS_SetGCParameter(JSRuntime *rt, JSGCParamKey key, uint32_t value)
{
switch (key) {
case JSGC_MAX_BYTES: {
JS_ASSERT(value >= rt->gcBytes);
rt->gcMaxBytes = value;
break;
}
case JSGC_MAX_MALLOC_BYTES:
rt->setGCMaxMallocBytes(value);
break;
case JSGC_SLICE_TIME_BUDGET:
rt->gcSliceBudget = SliceBudget::TimeBudget(value);
break;
case JSGC_MARK_STACK_LIMIT:
js::SetMarkStackLimit(rt, value);
break;
case JSGC_HIGH_FREQUENCY_TIME_LIMIT:
rt->gcHighFrequencyTimeThreshold = value;
break;
case JSGC_HIGH_FREQUENCY_LOW_LIMIT:
rt->gcHighFrequencyLowLimitBytes = value * 1024 * 1024;
break;
case JSGC_HIGH_FREQUENCY_HIGH_LIMIT:
rt->gcHighFrequencyHighLimitBytes = value * 1024 * 1024;
break;
case JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MAX:
rt->gcHighFrequencyHeapGrowthMax = value / 100.0;
break;
case JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MIN:
rt->gcHighFrequencyHeapGrowthMin = value / 100.0;
break;
case JSGC_LOW_FREQUENCY_HEAP_GROWTH:
rt->gcLowFrequencyHeapGrowth = value / 100.0;
break;
case JSGC_DYNAMIC_HEAP_GROWTH:
rt->gcDynamicHeapGrowth = value;
break;
case JSGC_DYNAMIC_MARK_SLICE:
rt->gcDynamicMarkSlice = value;
break;
case JSGC_ANALYSIS_PURGE_TRIGGER:
rt->analysisPurgeTriggerBytes = value * 1024 * 1024;
break;
case JSGC_ALLOCATION_THRESHOLD:
rt->gcAllocationThreshold = value * 1024 * 1024;
break;
case JSGC_DECOMMIT_THRESHOLD:
rt->gcDecommitThreshold = value * 1024 * 1024;
break;
default:
JS_ASSERT(key == JSGC_MODE);
rt->gcMode = JSGCMode(value);
JS_ASSERT(rt->gcMode == JSGC_MODE_GLOBAL ||
rt->gcMode == JSGC_MODE_COMPARTMENT ||
rt->gcMode == JSGC_MODE_INCREMENTAL);
return;
}
}
JS_PUBLIC_API(uint32_t)
JS_GetGCParameter(JSRuntime *rt, JSGCParamKey key)
{
switch (key) {
case JSGC_MAX_BYTES:
return uint32_t(rt->gcMaxBytes);
case JSGC_MAX_MALLOC_BYTES:
return rt->gcMaxMallocBytes;
case JSGC_BYTES:
return uint32_t(rt->gcBytes);
case JSGC_MODE:
return uint32_t(rt->gcMode);
case JSGC_UNUSED_CHUNKS:
return uint32_t(rt->gcChunkPool.getEmptyCount());
case JSGC_TOTAL_CHUNKS:
return uint32_t(rt->gcChunkSet.count() + rt->gcChunkPool.getEmptyCount());
case JSGC_SLICE_TIME_BUDGET:
return uint32_t(rt->gcSliceBudget > 0 ? rt->gcSliceBudget / PRMJ_USEC_PER_MSEC : 0);
case JSGC_MARK_STACK_LIMIT:
return rt->gcMarker.sizeLimit();
case JSGC_HIGH_FREQUENCY_TIME_LIMIT:
return rt->gcHighFrequencyTimeThreshold;
case JSGC_HIGH_FREQUENCY_LOW_LIMIT:
return rt->gcHighFrequencyLowLimitBytes / 1024 / 1024;
case JSGC_HIGH_FREQUENCY_HIGH_LIMIT:
return rt->gcHighFrequencyHighLimitBytes / 1024 / 1024;
case JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MAX:
return uint32_t(rt->gcHighFrequencyHeapGrowthMax * 100);
case JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MIN:
return uint32_t(rt->gcHighFrequencyHeapGrowthMin * 100);
case JSGC_LOW_FREQUENCY_HEAP_GROWTH:
return uint32_t(rt->gcLowFrequencyHeapGrowth * 100);
case JSGC_DYNAMIC_HEAP_GROWTH:
return rt->gcDynamicHeapGrowth;
case JSGC_DYNAMIC_MARK_SLICE:
return rt->gcDynamicMarkSlice;
case JSGC_ANALYSIS_PURGE_TRIGGER:
return rt->analysisPurgeTriggerBytes / 1024 / 1024;
case JSGC_ALLOCATION_THRESHOLD:
return rt->gcAllocationThreshold / 1024 / 1024;
default:
JS_ASSERT(key == JSGC_NUMBER);
return uint32_t(rt->gcNumber);
}
}
JS_PUBLIC_API(void)
JS_SetGCParameterForThread(JSContext *cx, JSGCParamKey key, uint32_t value)
{
JS_ASSERT(key == JSGC_MAX_CODE_CACHE_BYTES);
}
JS_PUBLIC_API(uint32_t)
JS_GetGCParameterForThread(JSContext *cx, JSGCParamKey key)
{
JS_ASSERT(key == JSGC_MAX_CODE_CACHE_BYTES);
return 0;
}
JS_PUBLIC_API(JSString *)
JS_NewExternalString(JSContext *cx, const jschar *chars, size_t length,
const JSStringFinalizer *fin)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSString *s = JSExternalString::new_(cx, chars, length, fin);
return s;
}
extern JS_PUBLIC_API(JSBool)
JS_IsExternalString(JSString *str)
{
return str->isExternal();
}
extern JS_PUBLIC_API(const JSStringFinalizer *)
JS_GetExternalStringFinalizer(JSString *str)
{
return str->asExternal().externalFinalizer();
}
JS_PUBLIC_API(void)
JS_SetNativeStackQuota(JSRuntime *rt, size_t stackSize)
{
rt->nativeStackQuota = stackSize;
if (!rt->nativeStackBase)
return;
#if JS_STACK_GROWTH_DIRECTION > 0
if (stackSize == 0) {
rt->mainThread.nativeStackLimit = UINTPTR_MAX;
} else {
JS_ASSERT(rt->nativeStackBase <= size_t(-1) - stackSize);
rt->mainThread.nativeStackLimit = rt->nativeStackBase + stackSize - 1;
}
#else
if (stackSize == 0) {
rt->mainThread.nativeStackLimit = 0;
} else {
JS_ASSERT(rt->nativeStackBase >= stackSize);
rt->mainThread.nativeStackLimit = rt->nativeStackBase - (stackSize - 1);
}
#endif
// If there's no pending interrupt request set on the runtime's main thread's
// ionStackLimit, then update it so that it reflects the new nativeStacklimit.
#ifdef JS_ION
{
JSRuntime::AutoLockForOperationCallback lock(rt);
if (rt->mainThread.ionStackLimit != uintptr_t(-1))
rt->mainThread.ionStackLimit = rt->mainThread.nativeStackLimit;
}
#endif
}
/************************************************************************/
JS_PUBLIC_API(int)
JS_IdArrayLength(JSContext *cx, JSIdArray *ida)
{
return ida->length;
}
JS_PUBLIC_API(jsid)
JS_IdArrayGet(JSContext *cx, JSIdArray *ida, int index)
{
JS_ASSERT(index >= 0 && index < ida->length);
return ida->vector[index];
}
JS_PUBLIC_API(void)
JS_DestroyIdArray(JSContext *cx, JSIdArray *ida)
{
DestroyIdArray(cx->runtime()->defaultFreeOp(), ida);
}
JS_PUBLIC_API(JSBool)
JS_ValueToId(JSContext *cx, jsval valueArg, jsid *idp)
{
RootedValue value(cx, valueArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
RootedId id(cx);
if (!ValueToId<CanGC>(cx, value, &id))
return false;
*idp = id;
return true;
}
JS_PUBLIC_API(JSBool)
JS_IdToValue(JSContext *cx, jsid id, jsval *vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
*vp = IdToJsval(id);
assertSameCompartment(cx, *vp);
return JS_TRUE;
}
JS_PUBLIC_API(JSBool)
JS_DefaultValue(JSContext *cx, JSObject *objArg, JSType hint, jsval *vp)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JS_ASSERT(obj != NULL);
JS_ASSERT(hint == JSTYPE_VOID || hint == JSTYPE_STRING || hint == JSTYPE_NUMBER);
RootedValue value(cx);
if (!JSObject::defaultValue(cx, obj, hint, &value))
return false;
*vp = value;
return true;
}
JS_PUBLIC_API(JSBool)
JS_PropertyStub(JSContext *cx, HandleObject obj, HandleId id, MutableHandleValue vp)
{
return JS_TRUE;
}
JS_PUBLIC_API(JSBool)
JS_StrictPropertyStub(JSContext *cx, HandleObject obj, HandleId id, JSBool strict, MutableHandleValue vp)
{
return JS_TRUE;
}
JS_PUBLIC_API(JSBool)
JS_DeletePropertyStub(JSContext *cx, HandleObject obj, HandleId id, JSBool *succeeded)
{
*succeeded = true;
return true;
}
JS_PUBLIC_API(JSBool)
JS_EnumerateStub(JSContext *cx, HandleObject obj)
{
return JS_TRUE;
}
JS_PUBLIC_API(JSBool)
JS_ResolveStub(JSContext *cx, HandleObject obj, HandleId id)
{
return JS_TRUE;
}
JS_PUBLIC_API(JSBool)
JS_ConvertStub(JSContext *cx, HandleObject obj, JSType type, MutableHandleValue vp)
{
JS_ASSERT(type != JSTYPE_OBJECT && type != JSTYPE_FUNCTION);
JS_ASSERT(obj);
return DefaultValue(cx, obj, type, vp);
}
JS_PUBLIC_API(JSObject *)
JS_InitClass(JSContext *cx, JSObject *objArg, JSObject *parent_protoArg,
JSClass *clasp, JSNative constructor, unsigned nargs,
const JSPropertySpec *ps, const JSFunctionSpec *fs,
const JSPropertySpec *static_ps, const JSFunctionSpec *static_fs)
{
RootedObject obj(cx, objArg);
RootedObject parent_proto(cx, parent_protoArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, parent_proto);
return js_InitClass(cx, obj, parent_proto, Valueify(clasp), constructor,
nargs, ps, fs, static_ps, static_fs);
}
JS_PUBLIC_API(JSBool)
JS_LinkConstructorAndPrototype(JSContext *cx, JSObject *ctorArg, JSObject *protoArg)
{
RootedObject ctor(cx, ctorArg);
RootedObject proto(cx, protoArg);
return LinkConstructorAndPrototype(cx, ctor, proto);
}
JS_PUBLIC_API(JSClass *)
JS_GetClass(JSObject *obj)
{
return obj->getJSClass();
}
JS_PUBLIC_API(JSBool)
JS_InstanceOf(JSContext *cx, JSObject *objArg, JSClass *clasp, jsval *argv)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
#ifdef DEBUG
if (argv) {
assertSameCompartment(cx, obj);
assertSameCompartment(cx, JSValueArray(argv - 2, 2));
}
#endif
if (!obj || obj->getJSClass() != clasp) {
if (argv)
ReportIncompatibleMethod(cx, CallReceiverFromArgv(argv), Valueify(clasp));
return false;
}
return true;
}
JS_PUBLIC_API(JSBool)
JS_HasInstance(JSContext *cx, JSObject *objArg, jsval valueArg, JSBool *bp)
{
RootedObject obj(cx, objArg);
RootedValue value(cx, valueArg);
AssertHeapIsIdle(cx);
assertSameCompartment(cx, obj, value);
return HasInstance(cx, obj, value, bp);
}
JS_PUBLIC_API(void *)
JS_GetPrivate(JSObject *obj)
{
/* This function can be called by a finalizer. */
return obj->getPrivate();
}
JS_PUBLIC_API(void)
JS_SetPrivate(JSObject *obj, void *data)
{
/* This function can be called by a finalizer. */
obj->setPrivate(data);
}
JS_PUBLIC_API(void *)
JS_GetInstancePrivate(JSContext *cx, JSObject *objArg, JSClass *clasp, jsval *argv)
{
RootedObject obj(cx, objArg);
if (!JS_InstanceOf(cx, obj, clasp, argv))
return NULL;
return obj->getPrivate();
}
JS_PUBLIC_API(JSBool)
JS_GetPrototype(JSContext *cx, JSObject *objArg, JSObject **protop)
{
RootedObject obj(cx, objArg);
RootedObject proto(cx);
bool rv = JSObject::getProto(cx, obj, &proto);
*protop = proto;
return rv;
}
JS_PUBLIC_API(JSBool)
JS_SetPrototype(JSContext *cx, JSObject *objArg, JSObject *protoArg)
{
RootedObject obj(cx, objArg);
RootedObject proto(cx, protoArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, proto);
return SetClassAndProto(cx, obj, obj->getClass(), proto, JS_FALSE);
}
JS_PUBLIC_API(JSObject *)
JS_GetParent(JSObject *obj)
{
JS_ASSERT(!obj->is<ScopeObject>());
return obj->getParent();
}
JS_PUBLIC_API(JSBool)
JS_SetParent(JSContext *cx, JSObject *objArg, JSObject *parentArg)
{
RootedObject obj(cx, objArg);
RootedObject parent(cx, parentArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JS_ASSERT(!obj->is<ScopeObject>());
JS_ASSERT(parent || !obj->getParent());
assertSameCompartment(cx, obj, parent);
return JSObject::setParent(cx, obj, parent);
}
JS_PUBLIC_API(JSObject *)
JS_GetConstructor(JSContext *cx, JSObject *protoArg)
{
RootedObject proto(cx, protoArg);
RootedValue cval(cx);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, proto);
{
JSAutoResolveFlags rf(cx, 0);
if (!JSObject::getProperty(cx, proto, proto, cx->names().constructor, &cval))
return NULL;
}
if (!IsFunctionObject(cval)) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_NO_CONSTRUCTOR,
proto->getClass()->name);
return NULL;
}
return &cval.toObject();
}
JS_PUBLIC_API(JSBool)
JS_GetObjectId(JSContext *cx, JSObject *obj, jsid *idp)
{
AssertHeapIsIdle(cx);
assertSameCompartment(cx, obj);
*idp = OBJECT_TO_JSID(obj);
return JS_TRUE;
}
class AutoHoldZone
{
public:
explicit AutoHoldZone(Zone *zone
MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
: holdp(&zone->hold)
{
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
*holdp = true;
}
~AutoHoldZone() {
*holdp = false;
}
private:
bool *holdp;
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
};
JS_PUBLIC_API(JSObject *)
JS_NewGlobalObject(JSContext *cx, JSClass *clasp, JSPrincipals *principals,
const JS::CompartmentOptions &options)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
JSRuntime *rt = cx->runtime();
Zone *zone;
if (options.zoneSpec == JS::SystemZone)
zone = rt->systemZone;
else if (options.zoneSpec == JS::FreshZone)
zone = NULL;
else
zone = ((JSObject *)options.zoneSpec)->zone();
JSCompartment *compartment = NewCompartment(cx, zone, principals, options);
if (!compartment)
return NULL;
if (options.zoneSpec == JS::SystemZone) {
rt->systemZone = compartment->zone();
rt->systemZone->isSystem = true;
}
AutoHoldZone hold(compartment->zone());
Rooted<GlobalObject *> global(cx);
{
AutoCompartment ac(cx, compartment);
global = GlobalObject::create(cx, Valueify(clasp));
}
if (!global)
return NULL;
if (!Debugger::onNewGlobalObject(cx, global))
return NULL;
return global;
}
JS_PUBLIC_API(JSObject *)
JS_NewObject(JSContext *cx, JSClass *jsclasp, JSObject *protoArg, JSObject *parentArg)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject proto(cx, protoArg);
RootedObject parent(cx, parentArg);
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, proto, parent);
Class *clasp = Valueify(jsclasp);
if (!clasp)
clasp = &ObjectClass; /* default class is Object */
JS_ASSERT(clasp != &JSFunction::class_);
JS_ASSERT(!(clasp->flags & JSCLASS_IS_GLOBAL));
JSObject *obj = NewObjectWithClassProto(cx, clasp, proto, parent);
if (obj) {
TypeObjectFlags flags = 0;
if (clasp->emulatesUndefined())
flags |= OBJECT_FLAG_EMULATES_UNDEFINED;
if (flags)
MarkTypeObjectFlags(cx, obj, flags);
}
JS_ASSERT_IF(obj, obj->getParent());
return obj;
}
JS_PUBLIC_API(JSObject *)
JS_NewObjectWithGivenProto(JSContext *cx, JSClass *jsclasp, JSObject *protoArg, JSObject *parentArg)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject proto(cx, protoArg);
RootedObject parent(cx, parentArg);
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, proto, parent);
Class *clasp = Valueify(jsclasp);
if (!clasp)
clasp = &ObjectClass; /* default class is Object */
JS_ASSERT(clasp != &JSFunction::class_);
JS_ASSERT(!(clasp->flags & JSCLASS_IS_GLOBAL));
JSObject *obj = NewObjectWithGivenProto(cx, clasp, proto, parent);
if (obj)
MarkTypeObjectUnknownProperties(cx, obj->type());
return obj;
}
JS_PUBLIC_API(JSObject *)
JS_NewObjectForConstructor(JSContext *cx, JSClass *clasp, const jsval *vp)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, *vp);
RootedObject obj(cx, JSVAL_TO_OBJECT(*vp));
return CreateThis(cx, Valueify(clasp), obj);
}
JS_PUBLIC_API(JSBool)
JS_IsExtensible(JSObject *obj)
{
return obj->isExtensible();
}
JS_PUBLIC_API(JSBool)
JS_IsNative(JSObject *obj)
{
return obj->isNative();
}
JS_PUBLIC_API(JSRuntime *)
JS_GetObjectRuntime(JSObject *obj)
{
return obj->compartment()->rt;
}
JS_PUBLIC_API(JSBool)
JS_FreezeObject(JSContext *cx, JSObject *objArg)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
return JSObject::freeze(cx, obj);
}
JS_PUBLIC_API(JSBool)
JS_DeepFreezeObject(JSContext *cx, JSObject *objArg)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
/* Assume that non-extensible objects are already deep-frozen, to avoid divergence. */
if (!obj->isExtensible())
return true;
if (!JSObject::freeze(cx, obj))
return false;
/* Walk slots in obj and if any value is a non-null object, seal it. */
for (uint32_t i = 0, n = obj->slotSpan(); i < n; ++i) {
const Value &v = obj->getSlot(i);
if (v.isPrimitive())
continue;
RootedObject obj(cx, &v.toObject());
if (!JS_DeepFreezeObject(cx, obj))
return false;
}
return true;
}
static JSBool
LookupPropertyById(JSContext *cx, HandleObject obj, HandleId id, unsigned flags,
MutableHandleObject objp, MutableHandleShape propp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
JSAutoResolveFlags rf(cx, flags);
return JSObject::lookupGeneric(cx, obj, id, objp, propp);
}
#define AUTO_NAMELEN(s,n) (((n) == (size_t)-1) ? js_strlen(s) : (n))
static JSBool
LookupResult(JSContext *cx, HandleObject obj, HandleObject obj2, HandleId id,
HandleShape shape, Value *vp)
{
TRACK_MEMORY_SCOPE("Javascript");
if (!shape) {
/* XXX bad API: no way to tell "not defined" from "void value" */
vp->setUndefined();
return JS_TRUE;
}
if (!obj2->isNative()) {
if (obj2->isProxy()) {
AutoPropertyDescriptorRooter desc(cx);
if (!Proxy::getPropertyDescriptor(cx, obj2, id, &desc, 0))
return false;
if (!(desc.attrs & JSPROP_SHARED)) {
*vp = desc.value;
return true;
}
}
} else if (IsImplicitDenseElement(shape)) {
*vp = obj2->getDenseElement(JSID_TO_INT(id));
return true;
} else {
/* Peek at the native property's slot value, without doing a Get. */
if (shape->hasSlot()) {
*vp = obj2->nativeGetSlot(shape->slot());
return true;
}
}
/* XXX bad API: no way to return "defined but value unknown" */
vp->setBoolean(true);
return true;
}
JS_PUBLIC_API(JSBool)
JS_LookupPropertyById(JSContext *cx, JSObject *objArg, jsid idArg, jsval *vp)
{
RootedId id(cx, idArg);
RootedObject obj(cx, objArg);
RootedObject obj2(cx);
RootedShape prop(cx);
return LookupPropertyById(cx, obj, id, 0, &obj2, &prop) &&
LookupResult(cx, obj, obj2, id, prop, vp);
}
JS_PUBLIC_API(JSBool)
JS_LookupElement(JSContext *cx, JSObject *objArg, uint32_t index, jsval *vp)
{
RootedObject obj(cx, objArg);
CHECK_REQUEST(cx);
RootedId id(cx);
if (!IndexToId(cx, index, &id))
return false;
return JS_LookupPropertyById(cx, obj, id, vp);
}
JS_PUBLIC_API(JSBool)
JS_LookupProperty(JSContext *cx, JSObject *objArg, const char *name, jsval *vp)
{
RootedObject obj(cx, objArg);
JSAtom *atom = Atomize(cx, name, strlen(name));
return atom && JS_LookupPropertyById(cx, obj, AtomToId(atom), vp);
}
JS_PUBLIC_API(JSBool)
JS_LookupUCProperty(JSContext *cx, JSObject *objArg, const jschar *name, size_t namelen, jsval *vp)
{
RootedObject obj(cx, objArg);
JSAtom *atom = AtomizeChars<CanGC>(cx, name, AUTO_NAMELEN(name, namelen));
return atom && JS_LookupPropertyById(cx, obj, AtomToId(atom), vp);
}
JS_PUBLIC_API(JSBool)
JS_LookupPropertyWithFlagsById(JSContext *cx, JSObject *objArg, jsid id_, unsigned flags,
JSObject **objpArg, jsval *vp)
{
RootedObject obj(cx, objArg);
RootedObject objp(cx, *objpArg);
RootedId id(cx, id_);
RootedShape prop(cx);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
if (!(obj->isNative()
? LookupPropertyWithFlags(cx, obj, id, flags, &objp, &prop)
: JSObject::lookupGeneric(cx, obj, id, &objp, &prop)))
return false;
if (!LookupResult(cx, obj, objp, id, prop, vp))
return false;
*objpArg = objp;
return true;
}
JS_PUBLIC_API(JSBool)
JS_LookupPropertyWithFlags(JSContext *cx, JSObject *objArg, const char *name, unsigned flags, jsval *vp)
{
RootedObject obj(cx, objArg);
JSObject *obj2;
JSAtom *atom = Atomize(cx, name, strlen(name));
return atom && JS_LookupPropertyWithFlagsById(cx, obj, AtomToId(atom), flags, &obj2, vp);
}
JS_PUBLIC_API(JSBool)
JS_HasPropertyById(JSContext *cx, JSObject *objArg, jsid idArg, JSBool *foundp)
{
RootedObject obj(cx, objArg);
RootedId id(cx, idArg);
RootedObject obj2(cx);
RootedShape prop(cx);
JSBool ok = LookupPropertyById(cx, obj, id, 0, &obj2, &prop);
*foundp = (prop != NULL);
return ok;
}
JS_PUBLIC_API(JSBool)
JS_HasElement(JSContext *cx, JSObject *objArg, uint32_t index, JSBool *foundp)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedId id(cx);
if (!IndexToId(cx, index, &id))
return false;
return JS_HasPropertyById(cx, obj, id, foundp);
}
JS_PUBLIC_API(JSBool)
JS_HasProperty(JSContext *cx, JSObject *objArg, const char *name, JSBool *foundp)
{
RootedObject obj(cx, objArg);
JSAtom *atom = Atomize(cx, name, strlen(name));
return atom && JS_HasPropertyById(cx, obj, AtomToId(atom), foundp);
}
JS_PUBLIC_API(JSBool)
JS_HasUCProperty(JSContext *cx, JSObject *objArg, const jschar *name, size_t namelen, JSBool *foundp)
{
RootedObject obj(cx, objArg);
JSAtom *atom = AtomizeChars<CanGC>(cx, name, AUTO_NAMELEN(name, namelen));
return atom && JS_HasPropertyById(cx, obj, AtomToId(atom), foundp);
}
JS_PUBLIC_API(JSBool)
JS_AlreadyHasOwnPropertyById(JSContext *cx, JSObject *objArg, jsid id_, JSBool *foundp)
{
RootedObject obj(cx, objArg);
RootedId id(cx, id_);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
if (!obj->isNative()) {
RootedObject obj2(cx);
RootedShape prop(cx);
if (!LookupPropertyById(cx, obj, id, 0, &obj2, &prop))
return JS_FALSE;
*foundp = (obj == obj2);
return JS_TRUE;
}
if (JSID_IS_INT(id) && obj->containsDenseElement(JSID_TO_INT(id))) {
*foundp = true;
return JS_TRUE;
}
*foundp = obj->nativeContains(cx, id);
return JS_TRUE;
}
JS_PUBLIC_API(JSBool)
JS_AlreadyHasOwnElement(JSContext *cx, JSObject *objArg, uint32_t index, JSBool *foundp)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedId id(cx);
if (!IndexToId(cx, index, &id))
return false;
return JS_AlreadyHasOwnPropertyById(cx, obj, id, foundp);
}
JS_PUBLIC_API(JSBool)
JS_AlreadyHasOwnProperty(JSContext *cx, JSObject *objArg, const char *name, JSBool *foundp)
{
RootedObject obj(cx, objArg);
JSAtom *atom = Atomize(cx, name, strlen(name));
return atom && JS_AlreadyHasOwnPropertyById(cx, obj, AtomToId(atom), foundp);
}
JS_PUBLIC_API(JSBool)
JS_AlreadyHasOwnUCProperty(JSContext *cx, JSObject *objArg, const jschar *name, size_t namelen,
JSBool *foundp)
{
RootedObject obj(cx, objArg);
JSAtom *atom = AtomizeChars<CanGC>(cx, name, AUTO_NAMELEN(name, namelen));
return atom && JS_AlreadyHasOwnPropertyById(cx, obj, AtomToId(atom), foundp);
}
/* Wrapper functions to create wrappers with no corresponding JSJitInfo from API
* function arguments.
*/
static JSPropertyOpWrapper
GetterWrapper(JSPropertyOp getter)
{
JSPropertyOpWrapper ret;
ret.op = getter;
ret.info = NULL;
return ret;
}
static JSStrictPropertyOpWrapper
SetterWrapper(JSStrictPropertyOp setter)
{
JSStrictPropertyOpWrapper ret;
ret.op = setter;
ret.info = NULL;
return ret;
}
static JSBool
DefinePropertyById(JSContext *cx, HandleObject obj, HandleId id, HandleValue value,
const JSPropertyOpWrapper &get, const JSStrictPropertyOpWrapper &set,
unsigned attrs, unsigned flags, int tinyid)
{
TRACK_MEMORY_SCOPE("Javascript");
PropertyOp getter = get.op;
StrictPropertyOp setter = set.op;
/*
* JSPROP_READONLY has no meaning when accessors are involved. Ideally we'd
* throw if this happens, but we've accepted it for long enough that it's
* not worth trying to make callers change their ways. Just flip it off on
* its way through the API layer so that we can enforce this internally.
*/
if (attrs & (JSPROP_GETTER | JSPROP_SETTER))
attrs &= ~JSPROP_READONLY;
/*
* When we use DefineProperty, we need full scriptable Function objects rather
* than JSNatives. However, we might be pulling this property descriptor off
* of something with JSNative property descriptors. If we are, wrap them in
* JS Function objects.
*/
if (attrs & JSPROP_NATIVE_ACCESSORS) {
JS_ASSERT(!(attrs & (JSPROP_GETTER | JSPROP_SETTER)));
JSFunction::Flags zeroFlags = JSAPIToJSFunctionFlags(0);
// We can't just use JS_NewFunctionById here because it
// assumes a string id.
RootedAtom atom(cx, JSID_IS_ATOM(id) ? JSID_TO_ATOM(id) : nullptr);
attrs &= ~JSPROP_NATIVE_ACCESSORS;
if (getter) {
RootedObject global(cx, (JSObject*) &obj->global());
JSFunction *getobj = NewFunction(cx, NullPtr(), (Native) getter, 0,
zeroFlags, global, atom);
if (!getobj)
return false;
if (get.info)
getobj->setJitInfo(get.info);
getter = JS_DATA_TO_FUNC_PTR(PropertyOp, getobj);
attrs |= JSPROP_GETTER;
}
if (setter) {
// Root just the getter, since the setter is not yet a JSObject.
AutoRooterGetterSetter getRoot(cx, JSPROP_GETTER, &getter, NULL);
RootedObject global(cx, (JSObject*) &obj->global());
JSFunction *setobj = NewFunction(cx, NullPtr(), (Native) setter, 1,
zeroFlags, global, atom);
if (!setobj)
return false;
if (set.info)
setobj->setJitInfo(set.info);
setter = JS_DATA_TO_FUNC_PTR(StrictPropertyOp, setobj);
attrs |= JSPROP_SETTER;
}
}
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id, value,
(attrs & JSPROP_GETTER)
? JS_FUNC_TO_DATA_PTR(JSObject *, getter)
: NULL,
(attrs & JSPROP_SETTER)
? JS_FUNC_TO_DATA_PTR(JSObject *, setter)
: NULL);
JSAutoResolveFlags rf(cx, 0);
if (flags != 0 && obj->isNative()) {
return DefineNativeProperty(cx, obj, id, value, getter, setter,
attrs, flags, tinyid);
}
return JSObject::defineGeneric(cx, obj, id, value, getter, setter, attrs);
}
JS_PUBLIC_API(JSBool)
JS_DefinePropertyById(JSContext *cx, JSObject *objArg, jsid idArg, jsval valueArg,
JSPropertyOp getter, JSStrictPropertyOp setter, unsigned attrs)
{
RootedObject obj(cx, objArg);
RootedId id(cx, idArg);
RootedValue value(cx, valueArg);
return DefinePropertyById(cx, obj, id, value, GetterWrapper(getter),
SetterWrapper(setter), attrs, 0, 0);
}
JS_PUBLIC_API(JSBool)
JS_DefineElement(JSContext *cx, JSObject *objArg, uint32_t index, jsval valueArg,
JSPropertyOp getter, JSStrictPropertyOp setter, unsigned attrs)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
RootedValue value(cx, valueArg);
AutoRooterGetterSetter gsRoot(cx, attrs, &getter, &setter);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedId id(cx);
if (!IndexToId(cx, index, &id))
return false;
return DefinePropertyById(cx, obj, id, value, GetterWrapper(getter),
SetterWrapper(setter), attrs, 0, 0);
}
static JSBool
DefineProperty(JSContext *cx, HandleObject obj, const char *name, const Value &value_,
const JSPropertyOpWrapper &getter, const JSStrictPropertyOpWrapper &setter,
unsigned attrs, unsigned flags, int tinyid)
{
RootedValue value(cx, value_);
AutoRooterGetterSetter gsRoot(cx, attrs, const_cast<JSPropertyOp *>(&getter.op),
const_cast<JSStrictPropertyOp *>(&setter.op));
RootedId id(cx);
if (attrs & JSPROP_INDEX) {
id = INT_TO_JSID(intptr_t(name));
attrs &= ~JSPROP_INDEX;
} else {
JSAtom *atom = Atomize(cx, name, strlen(name));
if (!atom)
return JS_FALSE;
id = AtomToId(atom);
}
return DefinePropertyById(cx, obj, id, value, getter, setter, attrs, flags, tinyid);
}
JS_PUBLIC_API(JSBool)
JS_DefineProperty(JSContext *cx, JSObject *objArg, const char *name, jsval valueArg,
PropertyOp getter, JSStrictPropertyOp setter, unsigned attrs)
{
RootedObject obj(cx, objArg);
RootedValue value(cx, valueArg);
return DefineProperty(cx, obj, name, value, GetterWrapper(getter),
SetterWrapper(setter), attrs, 0, 0);
}
JS_PUBLIC_API(JSBool)
JS_DefinePropertyWithTinyId(JSContext *cx, JSObject *objArg, const char *name, int8_t tinyid,
jsval valueArg, PropertyOp getter, JSStrictPropertyOp setter, unsigned attrs)
{
RootedObject obj(cx, objArg);
RootedValue value(cx, valueArg);
return DefineProperty(cx, obj, name, value, GetterWrapper(getter),
SetterWrapper(setter), attrs, Shape::HAS_SHORTID, tinyid);
}
static JSBool
DefineUCProperty(JSContext *cx, HandleObject obj, const jschar *name, size_t namelen,
const Value &value_, PropertyOp getter, StrictPropertyOp setter, unsigned attrs,
unsigned flags, int tinyid)
{
RootedValue value(cx, value_);
AutoRooterGetterSetter gsRoot(cx, attrs, &getter, &setter);
JSAtom *atom = AtomizeChars<CanGC>(cx, name, AUTO_NAMELEN(name, namelen));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return DefinePropertyById(cx, obj, id, value, GetterWrapper(getter),
SetterWrapper(setter), attrs, flags, tinyid);
}
JS_PUBLIC_API(JSBool)
JS_DefineUCProperty(JSContext *cx, JSObject *objArg, const jschar *name, size_t namelen,
jsval valueArg, JSPropertyOp getter, JSStrictPropertyOp setter, unsigned attrs)
{
RootedObject obj(cx, objArg);
RootedValue value(cx, valueArg);
return DefineUCProperty(cx, obj, name, namelen, value, getter, setter, attrs, 0, 0);
}
JS_PUBLIC_API(JSBool)
JS_DefineUCPropertyWithTinyId(JSContext *cx, JSObject *objArg, const jschar *name, size_t namelen,
int8_t tinyid, jsval valueArg,
JSPropertyOp getter, JSStrictPropertyOp setter, unsigned attrs)
{
RootedObject obj(cx, objArg);
RootedValue value(cx, valueArg);
return DefineUCProperty(cx, obj, name, namelen, value, getter, setter, attrs,
Shape::HAS_SHORTID, tinyid);
}
JS_PUBLIC_API(JSBool)
JS_DefineOwnProperty(JSContext *cx, JSObject *objArg, jsid idArg, jsval descriptorArg, JSBool *bp)
{
RootedObject obj(cx, objArg);
RootedId id(cx, idArg);
RootedValue descriptor(cx, descriptorArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id, descriptor);
return DefineOwnProperty(cx, obj, id, descriptor, bp);
}
JS_PUBLIC_API(JSObject *)
JS_DefineObject(JSContext *cx, JSObject *objArg, const char *name, JSClass *jsclasp,
JSObject *protoArg, unsigned attrs)
{
RootedObject obj(cx, objArg);
RootedObject proto(cx, protoArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, proto);
Class *clasp = Valueify(jsclasp);
if (!clasp)
clasp = &ObjectClass; /* default class is Object */
RootedObject nobj(cx, NewObjectWithClassProto(cx, clasp, proto, obj));
if (!nobj)
return NULL;
if (!DefineProperty(cx, obj, name, ObjectValue(*nobj), GetterWrapper(NULL),
SetterWrapper(NULL), attrs, 0, 0))
{
return NULL;
}
return nobj;
}
JS_PUBLIC_API(JSBool)
JS_DefineConstDoubles(JSContext *cx, JSObject *objArg, const JSConstDoubleSpec *cds)
{
RootedObject obj(cx, objArg);
JSBool ok;
unsigned attrs;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSPropertyOpWrapper noget = GetterWrapper(NULL);
JSStrictPropertyOpWrapper noset = SetterWrapper(NULL);
for (ok = JS_TRUE; cds->name; cds++) {
Value value = DoubleValue(cds->dval);
attrs = cds->flags;
if (!attrs)
attrs = JSPROP_READONLY | JSPROP_PERMANENT;
ok = DefineProperty(cx, obj, cds->name, value, noget, noset, attrs, 0, 0);
if (!ok)
break;
}
return ok;
}
JS_PUBLIC_API(JSBool)
JS_DefineProperties(JSContext *cx, JSObject *objArg, const JSPropertySpec *ps)
{
RootedObject obj(cx, objArg);
JSBool ok;
for (ok = true; ps->name; ps++) {
ok = DefineProperty(cx, obj, ps->name, UndefinedValue(), ps->getter, ps->setter,
ps->flags, Shape::HAS_SHORTID, ps->tinyid);
if (!ok)
break;
}
return ok;
}
static JSBool
GetPropertyDescriptorById(JSContext *cx, HandleObject obj, HandleId id, unsigned flags,
JSBool own, PropertyDescriptor *desc)
{
RootedObject obj2(cx);
RootedShape shape(cx);
if (!LookupPropertyById(cx, obj, id, flags, &obj2, &shape))
return JS_FALSE;
if (!shape || (own && obj != obj2)) {
desc->obj = NULL;
desc->attrs = 0;
desc->getter = NULL;
desc->setter = NULL;
desc->value.setUndefined();
return JS_TRUE;
}
desc->obj = obj2;
if (obj2->isNative()) {
if (IsImplicitDenseElement(shape)) {
desc->attrs = JSPROP_ENUMERATE;
desc->getter = NULL;
desc->setter = NULL;
desc->value = obj2->getDenseElement(JSID_TO_INT(id));
} else {
desc->attrs = shape->attributes();
desc->getter = shape->getter();
desc->setter = shape->setter();
if (shape->hasSlot())
desc->value = obj2->nativeGetSlot(shape->slot());
else
desc->value.setUndefined();
}
} else {
if (obj2->isProxy()) {
JSAutoResolveFlags rf(cx, flags);
return own
? Proxy::getOwnPropertyDescriptor(cx, obj2, id, desc, 0)
: Proxy::getPropertyDescriptor(cx, obj2, id, desc, 0);
}
if (!JSObject::getGenericAttributes(cx, obj2, id, &desc->attrs))
return false;
desc->getter = NULL;
desc->setter = NULL;
desc->value.setUndefined();
}
return true;
}
JS_PUBLIC_API(JSBool)
JS_GetPropertyDescriptorById(JSContext *cx, JSObject *objArg, jsid idArg, unsigned flags,
JSPropertyDescriptor *desc_)
{
RootedObject obj(cx, objArg);
RootedId id(cx, idArg);
AutoPropertyDescriptorRooter desc(cx);
if (!GetPropertyDescriptorById(cx, obj, id, flags, JS_FALSE, &desc))
return false;
*desc_ = desc;
return true;
}
JS_PUBLIC_API(JSBool)
JS_GetPropertyAttrsGetterAndSetterById(JSContext *cx, JSObject *objArg, jsid idArg,
unsigned *attrsp, JSBool *foundp,
JSPropertyOp *getterp, JSStrictPropertyOp *setterp)
{
RootedObject obj(cx, objArg);
RootedId id(cx, idArg);
AutoPropertyDescriptorRooter desc(cx);
if (!GetPropertyDescriptorById(cx, obj, id, 0, JS_FALSE, &desc))
return false;
*attrsp = desc.attrs;
*foundp = (desc.obj != NULL);
if (getterp)
*getterp = desc.getter;
if (setterp)
*setterp = desc.setter;
return true;
}
JS_PUBLIC_API(JSBool)
JS_GetPropertyAttributes(JSContext *cx, JSObject *objArg, const char *name,
unsigned *attrsp, JSBool *foundp)
{
RootedObject obj(cx, objArg);
JSAtom *atom = Atomize(cx, name, strlen(name));
return atom && JS_GetPropertyAttrsGetterAndSetterById(cx, obj, AtomToId(atom),
attrsp, foundp, NULL, NULL);
}
JS_PUBLIC_API(JSBool)
JS_GetUCPropertyAttributes(JSContext *cx, JSObject *objArg, const jschar *name, size_t namelen,
unsigned *attrsp, JSBool *foundp)
{
RootedObject obj(cx, objArg);
JSAtom *atom = AtomizeChars<CanGC>(cx, name, AUTO_NAMELEN(name, namelen));
return atom && JS_GetPropertyAttrsGetterAndSetterById(cx, obj, AtomToId(atom),
attrsp, foundp, NULL, NULL);
}
JS_PUBLIC_API(JSBool)
JS_GetPropertyAttrsGetterAndSetter(JSContext *cx, JSObject *objArg, const char *name,
unsigned *attrsp, JSBool *foundp,
JSPropertyOp *getterp, JSStrictPropertyOp *setterp)
{
RootedObject obj(cx, objArg);
JSAtom *atom = Atomize(cx, name, strlen(name));
return atom && JS_GetPropertyAttrsGetterAndSetterById(cx, obj, AtomToId(atom),
attrsp, foundp, getterp, setterp);
}
JS_PUBLIC_API(JSBool)
JS_GetUCPropertyAttrsGetterAndSetter(JSContext *cx, JSObject *objArg,
const jschar *name, size_t namelen,
unsigned *attrsp, JSBool *foundp,
JSPropertyOp *getterp, JSStrictPropertyOp *setterp)
{
RootedObject obj(cx, objArg);
JSAtom *atom = AtomizeChars<CanGC>(cx, name, AUTO_NAMELEN(name, namelen));
return atom && JS_GetPropertyAttrsGetterAndSetterById(cx, obj, AtomToId(atom),
attrsp, foundp, getterp, setterp);
}
JS_PUBLIC_API(JSBool)
JS_GetOwnPropertyDescriptor(JSContext *cx, JSObject *objArg, jsid idArg, jsval *vp)
{
RootedObject obj(cx, objArg);
RootedId id(cx, idArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedValue value(cx);
if (!GetOwnPropertyDescriptor(cx, obj, id, &value))
return false;
*vp = value;
return true;
}
static JSBool
SetPropertyAttributesById(JSContext *cx, HandleObject obj, HandleId id, unsigned attrs, JSBool *foundp)
{
RootedObject obj2(cx);
RootedShape shape(cx);
if (!LookupPropertyById(cx, obj, id, 0, &obj2, &shape))
return false;
if (!shape || obj != obj2) {
*foundp = false;
return true;
}
JSBool ok = obj->isNative()
? JSObject::changePropertyAttributes(cx, obj, shape, attrs)
: JSObject::setGenericAttributes(cx, obj, id, &attrs);
if (ok)
*foundp = true;
return ok;
}
JS_PUBLIC_API(JSBool)
JS_SetPropertyAttributes(JSContext *cx, JSObject *objArg, const char *name,
unsigned attrs, JSBool *foundp)
{
RootedObject obj(cx, objArg);
JSAtom *atom = Atomize(cx, name, strlen(name));
RootedId id(cx, AtomToId(atom));
return atom && SetPropertyAttributesById(cx, obj, id, attrs, foundp);
}
JS_PUBLIC_API(JSBool)
JS_SetUCPropertyAttributes(JSContext *cx, JSObject *objArg, const jschar *name, size_t namelen,
unsigned attrs, JSBool *foundp)
{
RootedObject obj(cx, objArg);
JSAtom *atom = AtomizeChars<CanGC>(cx, name, AUTO_NAMELEN(name, namelen));
RootedId id(cx, AtomToId(atom));
return atom && SetPropertyAttributesById(cx, obj, id, attrs, foundp);
}
JS_PUBLIC_API(JSBool)
JS_GetPropertyById(JSContext *cx, JSObject *objArg, jsid idArg, jsval *vp)
{
return JS_ForwardGetPropertyTo(cx, objArg, idArg, objArg, vp);
}
JS_PUBLIC_API(JSBool)
JS_ForwardGetPropertyTo(JSContext *cx, JSObject *objArg, jsid idArg, JSObject *onBehalfOfArg, jsval *vp)
{
RootedObject obj(cx, objArg);
RootedObject onBehalfOf(cx, onBehalfOfArg);
RootedId id(cx, idArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
assertSameCompartment(cx, onBehalfOf);
JSAutoResolveFlags rf(cx, 0);
RootedValue value(cx);
if (!JSObject::getGeneric(cx, obj, onBehalfOf, id, &value))
return false;
*vp = value;
return true;
}
JS_PUBLIC_API(JSBool)
JS_GetPropertyByIdDefault(JSContext *cx, JSObject *objArg, jsid idArg, jsval defArg, jsval *vp)
{
RootedObject obj(cx, objArg);
RootedId id(cx, idArg);
RootedValue def(cx, defArg);
RootedValue value(cx);
if (!baseops::GetPropertyDefault(cx, obj, id, def, &value))
return false;
*vp = value;
return true;
}
JS_PUBLIC_API(JSBool)
JS_GetElement(JSContext *cx, JSObject *objArg, uint32_t index, jsval *vp)
{
return JS_ForwardGetElementTo(cx, objArg, index, objArg, vp);
}
JS_PUBLIC_API(JSBool)
JS_ForwardGetElementTo(JSContext *cx, JSObject *objArg, uint32_t index, JSObject *onBehalfOfArg, jsval *vp)
{
RootedObject obj(cx, objArg);
RootedObject onBehalfOf(cx, onBehalfOfArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAutoResolveFlags rf(cx, 0);
RootedValue value(cx);
if (!JSObject::getElement(cx, obj, onBehalfOf, index, &value))
return false;
*vp = value;
return true;
}
JS_PUBLIC_API(JSBool)
JS_GetElementIfPresent(JSContext *cx, JSObject *objArg, uint32_t index, JSObject *onBehalfOfArg, jsval *vp, JSBool* present)
{
RootedObject obj(cx, objArg);
RootedObject onBehalfOf(cx, onBehalfOfArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAutoResolveFlags rf(cx, 0);
RootedValue value(cx);
bool isPresent;
if (!JSObject::getElementIfPresent(cx, obj, onBehalfOf, index, &value, &isPresent))
return false;
*vp = value;
*present = isPresent;
return true;
}
JS_PUBLIC_API(JSBool)
JS_GetProperty(JSContext *cx, JSObject *objArg, const char *name, jsval *vp)
{
RootedObject obj(cx, objArg);
JSAtom *atom = Atomize(cx, name, strlen(name));
return atom && JS_GetPropertyById(cx, obj, AtomToId(atom), vp);
}
JS_PUBLIC_API(JSBool)
JS_GetPropertyDefault(JSContext *cx, JSObject *objArg, const char *name, jsval defArg, jsval *vp)
{
RootedObject obj(cx, objArg);
RootedValue def(cx, defArg);
JSAtom *atom = Atomize(cx, name, strlen(name));
return atom && JS_GetPropertyByIdDefault(cx, obj, AtomToId(atom), def, vp);
}
JS_PUBLIC_API(JSBool)
JS_GetUCProperty(JSContext *cx, JSObject *objArg, const jschar *name, size_t namelen, jsval *vp)
{
RootedObject obj(cx, objArg);
JSAtom *atom = AtomizeChars<CanGC>(cx, name, AUTO_NAMELEN(name, namelen));
return atom && JS_GetPropertyById(cx, obj, AtomToId(atom), vp);
}
JS_PUBLIC_API(JSBool)
JS_SetPropertyById(JSContext *cx, JSObject *objArg, jsid idArg, jsval *vp)
{
RootedObject obj(cx, objArg);
RootedId id(cx, idArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
JSAutoResolveFlags rf(cx, JSRESOLVE_ASSIGNING);
RootedValue value(cx, *vp);
if (!JSObject::setGeneric(cx, obj, obj, id, &value, false))
return false;
*vp = value;
return true;
}
JS_PUBLIC_API(JSBool)
JS_SetElement(JSContext *cx, JSObject *objArg, uint32_t index, jsval *vp)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, *vp);
JSAutoResolveFlags rf(cx, JSRESOLVE_ASSIGNING);
RootedValue value(cx, *vp);
if (!JSObject::setElement(cx, obj, obj, index, &value, false))
return false;
*vp = value;
return true;
}
JS_PUBLIC_API(JSBool)
JS_SetProperty(JSContext *cx, JSObject *objArg, const char *name, jsval *vp)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
JSAtom *atom = Atomize(cx, name, strlen(name));
return atom && JS_SetPropertyById(cx, obj, AtomToId(atom), vp);
}
JS_PUBLIC_API(JSBool)
JS_SetUCProperty(JSContext *cx, JSObject *objArg, const jschar *name, size_t namelen, jsval *vp)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
JSAtom *atom = AtomizeChars<CanGC>(cx, name, AUTO_NAMELEN(name, namelen));
return atom && JS_SetPropertyById(cx, obj, AtomToId(atom), vp);
}
JS_PUBLIC_API(JSBool)
JS_DeletePropertyById2(JSContext *cx, JSObject *objArg, jsid id, jsval *rval)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
JSAutoResolveFlags rf(cx, 0);
RootedValue value(cx);
JSBool succeeded;
if (JSID_IS_SPECIAL(id)) {
Rooted<SpecialId> sid(cx, JSID_TO_SPECIALID(id));
if (!JSObject::deleteSpecial(cx, obj, sid, &succeeded))
return false;
} else {
if (!JSObject::deleteByValue(cx, obj, IdToValue(id), &succeeded))
return false;
}
*rval = BooleanValue(succeeded);
return true;
}
JS_PUBLIC_API(JSBool)
JS_DeleteElement2(JSContext *cx, JSObject *objArg, uint32_t index, jsval *rval)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAutoResolveFlags rf(cx, 0);
JSBool succeeded;
if (!JSObject::deleteElement(cx, obj, index, &succeeded))
return false;
*rval = BooleanValue(succeeded);
return true;
}
JS_PUBLIC_API(JSBool)
JS_DeleteProperty2(JSContext *cx, JSObject *objArg, const char *name, jsval *rval)
{
RootedObject obj(cx, objArg);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAutoResolveFlags rf(cx, 0);
JSAtom *atom = Atomize(cx, name, strlen(name));
if (!atom)
return false;
JSBool succeeded;
if (!JSObject::deleteByValue(cx, obj, StringValue(atom), &succeeded))
return false;
*rval = BooleanValue(succeeded);
return true;
}
JS_PUBLIC_API(JSBool)
JS_DeleteUCProperty2(JSContext *cx, JSObject *objArg, const jschar *name, size_t namelen, jsval *rval)
{
RootedObject obj(cx, objArg);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAutoResolveFlags rf(cx, 0);
JSAtom *atom = AtomizeChars<CanGC>(cx, name, AUTO_NAMELEN(name, namelen));
if (!atom)
return false;
JSBool succeeded;
if (!JSObject::deleteByValue(cx, obj, StringValue(atom), &succeeded))
return false;
*rval = BooleanValue(succeeded);
return true;
}
JS_PUBLIC_API(JSBool)
JS_DeletePropertyById(JSContext *cx, JSObject *objArg, jsid idArg)
{
jsval junk;
return JS_DeletePropertyById2(cx, objArg, idArg, &junk);
}
JS_PUBLIC_API(JSBool)
JS_DeleteElement(JSContext *cx, JSObject *objArg, uint32_t index)
{
jsval junk;
return JS_DeleteElement2(cx, objArg, index, &junk);
}
JS_PUBLIC_API(JSBool)
JS_DeleteProperty(JSContext *cx, JSObject *objArg, const char *name)
{
jsval junk;
return JS_DeleteProperty2(cx, objArg, name, &junk);
}
static Shape *
LastConfigurableShape(JSObject *obj)
{
for (Shape::Range<NoGC> r(obj->lastProperty()); !r.empty(); r.popFront()) {
Shape *shape = &r.front();
if (shape->configurable())
return shape;
}
return NULL;
}
JS_PUBLIC_API(void)
JS_ClearNonGlobalObject(JSContext *cx, JSObject *objArg)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JS_ASSERT(!obj->is<GlobalObject>());
if (!obj->isNative())
return;
/* Remove all configurable properties from obj. */
RootedShape shape(cx);
while ((shape = LastConfigurableShape(obj))) {
if (!obj->removeProperty(cx, shape->propid()))
return;
}
/* Set all remaining writable plain data properties to undefined. */
for (Shape::Range<NoGC> r(obj->lastProperty()); !r.empty(); r.popFront()) {
Shape *shape = &r.front();
if (shape->isDataDescriptor() &&
shape->writable() &&
shape->hasDefaultSetter() &&
shape->hasSlot())
{
obj->nativeSetSlot(shape->slot(), UndefinedValue());
}
}
}
JS_PUBLIC_API(void)
JS_SetAllNonReservedSlotsToUndefined(JSContext *cx, JSObject *objArg)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
if (!obj->isNative())
return;
Class *clasp = obj->getClass();
unsigned numReserved = JSCLASS_RESERVED_SLOTS(clasp);
unsigned numSlots = obj->slotSpan();
for (unsigned i = numReserved; i < numSlots; i++)
obj->setSlot(i, UndefinedValue());
}
JS_PUBLIC_API(JSIdArray *)
JS_Enumerate(JSContext *cx, JSObject *objArg)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
AutoIdVector props(cx);
JSIdArray *ida;
if (!GetPropertyNames(cx, obj, JSITER_OWNONLY, &props) || !VectorToIdArray(cx, props, &ida))
return NULL;
return ida;
}
/*
* XXX reverse iterator for properties, unreverse and meld with jsinterp.c's
* prop_iterator_class somehow...
* + preserve the obj->enumerate API while optimizing the native object case
* + native case here uses a JSShape *, but that iterates in reverse!
* + so we make non-native match, by reverse-iterating after JS_Enumerating
*/
const uint32_t JSSLOT_ITER_INDEX = 0;
static void
prop_iter_finalize(FreeOp *fop, JSObject *obj)
{
void *pdata = obj->getPrivate();
if (!pdata)
return;
if (obj->getSlot(JSSLOT_ITER_INDEX).toInt32() >= 0) {
/* Non-native case: destroy the ida enumerated when obj was created. */
JSIdArray *ida = (JSIdArray *) pdata;
DestroyIdArray(fop, ida);
}
}
static void
prop_iter_trace(JSTracer *trc, JSObject *obj)
{
void *pdata = obj->getPrivate();
if (!pdata)
return;
if (obj->getSlot(JSSLOT_ITER_INDEX).toInt32() < 0) {
/*
* Native case: just mark the next property to visit. We don't need a
* barrier here because the pointer is updated via setPrivate, which
* always takes a barrier.
*/
Shape *tmp = static_cast<Shape *>(pdata);
MarkShapeUnbarriered(trc, &tmp, "prop iter shape");
obj->setPrivateUnbarriered(tmp);
} else {
/* Non-native case: mark each id in the JSIdArray private. */
JSIdArray *ida = (JSIdArray *) pdata;
MarkIdRange(trc, ida->length, ida->vector, "prop iter");
}
}
static Class prop_iter_class = {
"PropertyIterator",
JSCLASS_HAS_PRIVATE | JSCLASS_IMPLEMENTS_BARRIERS | JSCLASS_HAS_RESERVED_SLOTS(1),
JS_PropertyStub, /* addProperty */
JS_DeletePropertyStub, /* delProperty */
JS_PropertyStub, /* getProperty */
JS_StrictPropertyStub, /* setProperty */
JS_EnumerateStub,
JS_ResolveStub,
JS_ConvertStub,
prop_iter_finalize,
NULL, /* checkAccess */
NULL, /* call */
NULL, /* construct */
NULL, /* hasInstance */
prop_iter_trace
};
JS_PUBLIC_API(JSObject *)
JS_NewPropertyIterator(JSContext *cx, JSObject *objArg)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
RootedObject iterobj(cx, NewObjectWithClassProto(cx, &prop_iter_class, NULL, obj));
if (!iterobj)
return NULL;
int index;
if (obj->isNative()) {
/* Native case: start with the last property in obj. */
iterobj->setPrivateGCThing(obj->lastProperty());
index = -1;
} else {
/* Non-native case: enumerate a JSIdArray and keep it via private. */
JSIdArray *ida = JS_Enumerate(cx, obj);
if (!ida)
return NULL;
iterobj->setPrivate((void *)ida);
index = ida->length;
}
/* iterobj cannot escape to other threads here. */
iterobj->setSlot(JSSLOT_ITER_INDEX, Int32Value(index));
return iterobj;
}
JS_PUBLIC_API(JSBool)
JS_NextProperty(JSContext *cx, JSObject *iterobjArg, jsid *idp)
{
RootedObject iterobj(cx, iterobjArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, iterobj);
int32_t i = iterobj->getSlot(JSSLOT_ITER_INDEX).toInt32();
if (i < 0) {
/* Native case: private data is a property tree node pointer. */
JS_ASSERT(iterobj->getParent()->isNative());
Shape *shape = static_cast<Shape *>(iterobj->getPrivate());
while (shape->previous() && !shape->enumerable())
shape = shape->previous();
if (!shape->previous()) {
JS_ASSERT(shape->isEmptyShape());
*idp = JSID_VOID;
} else {
iterobj->setPrivateGCThing(const_cast<Shape *>(shape->previous().get()));
*idp = shape->propid();
}
} else {
/* Non-native case: use the ida enumerated when iterobj was created. */
JSIdArray *ida = (JSIdArray *) iterobj->getPrivate();
JS_ASSERT(i <= ida->length);
STATIC_ASSUME(i <= ida->length);
if (i == 0) {
*idp = JSID_VOID;
} else {
*idp = ida->vector[--i];
iterobj->setSlot(JSSLOT_ITER_INDEX, Int32Value(i));
}
}
return true;
}
JS_PUBLIC_API(JSBool)
JS_ArrayIterator(JSContext *cx, unsigned argc, jsval *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
Rooted<Value> target(cx, args.thisv());
AssertHeapIsIdle(cx);
assertSameCompartment(cx, target);
CHECK_REQUEST(cx);
JSObject *iterobj = ElementIteratorObject::create(cx, target);
if (!iterobj)
return false;
vp->setObject(*iterobj);
return true;
}
JS_PUBLIC_API(jsval)
JS_GetReservedSlot(JSObject *obj, uint32_t index)
{
return obj->getReservedSlot(index);
}
JS_PUBLIC_API(void)
JS_SetReservedSlot(JSObject *obj, uint32_t index, Value value)
{
obj->setReservedSlot(index, value);
}
JS_PUBLIC_API(JSObject *)
JS_NewArrayObject(JSContext *cx, int length, jsval *vector)
{
TRACK_MEMORY_SCOPE("Javascript");
AutoArrayRooter tvr(cx, length, vector);
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, JSValueArray(vector, vector ? (uint32_t)length : 0));
return NewDenseCopiedArray(cx, (uint32_t)length, vector);
}
JS_PUBLIC_API(JSBool)
JS_IsArrayObject(JSContext *cx, JSObject *objArg)
{
RootedObject obj(cx, objArg);
assertSameCompartment(cx, obj);
return ObjectClassIs(obj, ESClass_Array, cx);
}
JS_PUBLIC_API(JSBool)
JS_GetArrayLength(JSContext *cx, JSObject *objArg, uint32_t *lengthp)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
return GetLengthProperty(cx, obj, lengthp);
}
JS_PUBLIC_API(JSBool)
JS_SetArrayLength(JSContext *cx, JSObject *objArg, uint32_t length)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
return SetLengthProperty(cx, obj, length);
}
JS_PUBLIC_API(JSBool)
JS_CheckAccess(JSContext *cx, JSObject *objArg, jsid idArg, JSAccessMode mode,
jsval *vp, unsigned *attrsp)
{
RootedObject obj(cx, objArg);
RootedId id(cx, idArg);
RootedValue value(cx, *vp);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
JSBool status = CheckAccess(cx, obj, id, mode, &value, attrsp);
*vp = value;
return status;
}
JS_PUBLIC_API(void)
JS_HoldPrincipals(JSPrincipals *principals)
{
JS_ATOMIC_INCREMENT(&principals->refcount);
}
JS_PUBLIC_API(void)
JS_DropPrincipals(JSRuntime *rt, JSPrincipals *principals)
{
int rc = JS_ATOMIC_DECREMENT(&principals->refcount);
if (rc == 0)
rt->destroyPrincipals(principals);
}
JS_PUBLIC_API(void)
JS_SetSecurityCallbacks(JSRuntime *rt, const JSSecurityCallbacks *scb)
{
JS_ASSERT(scb != &NullSecurityCallbacks);
rt->securityCallbacks = scb ? scb : &NullSecurityCallbacks;
}
JS_PUBLIC_API(const JSSecurityCallbacks *)
JS_GetSecurityCallbacks(JSRuntime *rt)
{
return (rt->securityCallbacks != &NullSecurityCallbacks) ? rt->securityCallbacks : NULL;
}
JS_PUBLIC_API(void)
JS_SetTrustedPrincipals(JSRuntime *rt, JSPrincipals *prin)
{
rt->setTrustedPrincipals(prin);
}
extern JS_PUBLIC_API(void)
JS_InitDestroyPrincipalsCallback(JSRuntime *rt, JSDestroyPrincipalsOp destroyPrincipals)
{
JS_ASSERT(destroyPrincipals);
JS_ASSERT(!rt->destroyPrincipals);
rt->destroyPrincipals = destroyPrincipals;
}
JS_PUBLIC_API(JSFunction *)
JS_NewFunction(JSContext *cx, JSNative native, unsigned nargs, unsigned flags,
JSObject *parentArg, const char *name)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject parent(cx, parentArg);
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, parent);
RootedAtom atom(cx);
if (name) {
atom = Atomize(cx, name, strlen(name));
if (!atom)
return NULL;
}
JSFunction::Flags funFlags = JSAPIToJSFunctionFlags(flags);
return NewFunction(cx, NullPtr(), native, nargs, funFlags, parent, atom);
}
JS_PUBLIC_API(JSFunction *)
JS_NewFunctionById(JSContext *cx, JSNative native, unsigned nargs, unsigned flags, JSObject *parentArg,
jsid id)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject parent(cx, parentArg);
JS_ASSERT(JSID_IS_STRING(id));
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, parent);
RootedAtom atom(cx, JSID_TO_ATOM(id));
JSFunction::Flags funFlags = JSAPIToJSFunctionFlags(flags);
return NewFunction(cx, NullPtr(), native, nargs, funFlags, parent, atom);
}
JS_PUBLIC_API(JSObject *)
JS_CloneFunctionObject(JSContext *cx, JSObject *funobjArg, JSObject *parentArg)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject funobj(cx, funobjArg);
RootedObject parent(cx, parentArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, parent);
// Note that funobj can be in a different compartment.
if (!parent)
parent = cx->global();
if (!funobj->is<JSFunction>()) {
AutoCompartment ac(cx, funobj);
ReportIsNotFunction(cx, ObjectValue(*funobj));
return NULL;
}
/*
* If a function was compiled to be lexically nested inside some other
* script, we cannot clone it without breaking the compiler's assumptions.
*/
RootedFunction fun(cx, &funobj->as<JSFunction>());
if (fun->isInterpretedLazy()) {
AutoCompartment ac(cx, funobj);
if (!fun->getOrCreateScript(cx))
return NULL;
}
if (fun->isInterpreted() && (fun->nonLazyScript()->enclosingStaticScope() ||
(fun->nonLazyScript()->compileAndGo && !parent->is<GlobalObject>())))
{
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_BAD_CLONE_FUNOBJ_SCOPE);
return NULL;
}
if (fun->isBoundFunction()) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_CLONE_OBJECT);
return NULL;
}
if (fun->isNative() && IsAsmJSModuleNative(fun->native())) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_CLONE_OBJECT);
return NULL;
}
return CloneFunctionObject(cx, fun, parent, fun->getAllocKind());
}
JS_PUBLIC_API(JSObject *)
JS_GetFunctionObject(JSFunction *fun)
{
return fun;
}
JS_PUBLIC_API(JSString *)
JS_GetFunctionId(JSFunction *fun)
{
return fun->atom();
}
JS_PUBLIC_API(JSString *)
JS_GetFunctionDisplayId(JSFunction *fun)
{
return fun->displayAtom();
}
JS_PUBLIC_API(uint16_t)
JS_GetFunctionArity(JSFunction *fun)
{
return fun->nargs;
}
JS_PUBLIC_API(JSBool)
JS_ObjectIsFunction(JSContext *cx, JSObject *obj)
{
return obj->is<JSFunction>();
}
JS_PUBLIC_API(JSBool)
JS_ObjectIsCallable(JSContext *cx, JSObject *obj)
{
return obj->isCallable();
}
JS_PUBLIC_API(JSBool)
JS_IsNativeFunction(JSObject *funobj, JSNative call)
{
if (!funobj->is<JSFunction>())
return false;
JSFunction *fun = &funobj->as<JSFunction>();
return fun->isNative() && fun->native() == call;
}
extern JS_PUBLIC_API(JSBool)
JS_IsConstructor(JSFunction *fun)
{
return fun->isNativeConstructor() || fun->isInterpretedConstructor();
}
JS_PUBLIC_API(JSObject*)
JS_BindCallable(JSContext *cx, JSObject *targetArg, JSObject *newThis)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject target(cx, targetArg);
RootedValue thisArg(cx, ObjectValue(*newThis));
return js_fun_bind(cx, target, thisArg, NULL, 0);
}
JSBool
js_generic_native_method_dispatcher(JSContext *cx, unsigned argc, Value *vp)
{
TRACK_MEMORY_SCOPE("Javascript");
CallArgs args = CallArgsFromVp(argc, vp);
const JSFunctionSpec *fs = (JSFunctionSpec *)
vp->toObject().as<JSFunction>().getExtendedSlot(0).toPrivate();
JS_ASSERT((fs->flags & JSFUN_GENERIC_NATIVE) != 0);
if (argc < 1) {
js_ReportMissingArg(cx, args.calleev(), 0);
return JS_FALSE;
}
/*
* Copy all actual (argc) arguments down over our |this| parameter, vp[1],
* which is almost always the class constructor object, e.g. Array. Then
* call the corresponding prototype native method with our first argument
* passed as |this|.
*/
memmove(vp + 1, vp + 2, argc * sizeof(jsval));
/* Clear the last parameter in case too few arguments were passed. */
vp[2 + --argc].setUndefined();
return fs->call.op(cx, argc, vp);
}
JS_PUBLIC_API(JSBool)
JS_DefineFunctions(JSContext *cx, JSObject *objArg, const JSFunctionSpec *fs)
{
TRACK_MEMORY_SCOPE("Javascript");
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, objArg);
RootedObject obj(cx, objArg);
RootedObject ctor(cx);
for (; fs->name; fs++) {
RootedAtom atom(cx, Atomize(cx, fs->name, strlen(fs->name)));
if (!atom)
return JS_FALSE;
Rooted<jsid> id(cx, AtomToId(atom));
/*
* Define a generic arity N+1 static method for the arity N prototype
* method if flags contains JSFUN_GENERIC_NATIVE.
*/
unsigned flags = fs->flags;
if (flags & JSFUN_GENERIC_NATIVE) {
if (!ctor) {
ctor = JS_GetConstructor(cx, obj);
if (!ctor)
return JS_FALSE;
}
flags &= ~JSFUN_GENERIC_NATIVE;
JSFunction *fun = DefineFunction(cx, ctor, id,
js_generic_native_method_dispatcher,
fs->nargs + 1, flags,
JSFunction::ExtendedFinalizeKind);
if (!fun)
return JS_FALSE;
/*
* As jsapi.h notes, fs must point to storage that lives as long
* as fun->object lives.
*/
fun->setExtendedSlot(0, PrivateValue(const_cast<JSFunctionSpec*>(fs)));
}
/*
* Delay cloning self-hosted functions until they are called. This is
* achieved by passing DefineFunction a NULL JSNative which
* produces an interpreted JSFunction where !hasScript. Interpreted
* call paths then call InitializeLazyFunctionScript if !hasScript.
*/
if (fs->selfHostedName) {
/*
* During creation of the self-hosting global, we ignore all
* self-hosted functions, as that means we're currently setting up
* the global object that the self-hosted code is then compiled
* in. Self-hosted functions can access each other via their names,
* but not via the builtin classes they get installed into.
*/
if (cx->runtime()->isSelfHostingGlobal(cx->global()))
continue;
RootedAtom shAtom(cx, Atomize(cx, fs->selfHostedName, strlen(fs->selfHostedName)));
if (!shAtom)
return JS_FALSE;
RootedPropertyName shName(cx, shAtom->asPropertyName());
RootedValue funVal(cx);
if (!cx->runtime()->maybeWrappedSelfHostedFunction(cx, shName, &funVal))
return JS_FALSE;
if (!funVal.isUndefined()) {
if (!JSObject::defineProperty(cx, obj, atom->asPropertyName(), funVal,
NULL, NULL, flags & ~JSFUN_FLAGS_MASK))
{
return JS_FALSE;
}
} else {
JSFunction *fun = DefineFunction(cx, obj, id, /* native = */ NULL, fs->nargs, 0,
JSFunction::ExtendedFinalizeKind, SingletonObject);
if (!fun)
return JS_FALSE;
fun->setIsSelfHostedBuiltin();
fun->setExtendedSlot(0, PrivateValue(const_cast<JSFunctionSpec*>(fs)));
funVal.setObject(*fun);
}
RootedObject holder(cx, cx->global()->intrinsicsHolder());
if (!JSObject::defineProperty(cx, holder, shName, funVal))
return JS_FALSE;
} else {
JSFunction *fun = DefineFunction(cx, obj, id, fs->call.op, fs->nargs, flags);
if (!fun)
return JS_FALSE;
if (fs->call.info)
fun->setJitInfo(fs->call.info);
}
}
return JS_TRUE;
}
JS_PUBLIC_API(JSFunction *)
JS_DefineFunction(JSContext *cx, JSObject *objArg, const char *name, JSNative call,
unsigned nargs, unsigned attrs)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAtom *atom = Atomize(cx, name, strlen(name));
if (!atom)
return NULL;
Rooted<jsid> id(cx, AtomToId(atom));
return DefineFunction(cx, obj, id, call, nargs, attrs);
}
JS_PUBLIC_API(JSFunction *)
JS_DefineUCFunction(JSContext *cx, JSObject *objArg,
const jschar *name, size_t namelen, JSNative call,
unsigned nargs, unsigned attrs)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAtom *atom = AtomizeChars<CanGC>(cx, name, AUTO_NAMELEN(name, namelen));
if (!atom)
return NULL;
Rooted<jsid> id(cx, AtomToId(atom));
return DefineFunction(cx, obj, id, call, nargs, attrs);
}
extern JS_PUBLIC_API(JSFunction *)
JS_DefineFunctionById(JSContext *cx, JSObject *objArg, jsid id_, JSNative call,
unsigned nargs, unsigned attrs)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
RootedId id(cx, id_);
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
return DefineFunction(cx, obj, id, call, nargs, attrs);
}
struct AutoLastFrameCheck
{
AutoLastFrameCheck(JSContext *cx
MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
: cx(cx)
{
JS_ASSERT(cx);
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
}
~AutoLastFrameCheck() {
if (cx->isExceptionPending() &&
!JS_IsRunning(cx) &&
!cx->hasOption(JSOPTION_DONT_REPORT_UNCAUGHT)) {
js_ReportUncaughtException(cx);
}
}
private:
JSContext *cx;
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
};
/* Use the fastest available getc. */
#if defined(HAVE_GETC_UNLOCKED)
# define fast_getc getc_unlocked
#elif defined(HAVE__GETC_NOLOCK)
# define fast_getc _getc_nolock
#else
# define fast_getc getc
#endif
typedef Vector<char, 8, TempAllocPolicy> FileContents;
#if defined(STARBOARD)
static bool
ReadCompleteFile(JSContext *cx, SbFile file, FileContents &buffer)
{
TRACK_MEMORY_SCOPE("Javascript");
SbFileInfo info;
bool success = SbFileGetInfo(file, &info);
if (!success) {
return false;
}
const int64_t kFileSize = info.size;
buffer.resize(kFileSize);
if (SbFileReadAll(file, buffer.begin(), kFileSize) < 0) {
return false;
}
return true;
}
class AutoFile
{
SbFile sb_file_;
public:
AutoFile() {}
~AutoFile()
{
SbFileClose(sb_file_);
}
SbFile sb_file() const { return sb_file_; }
bool open(JSContext *cx, const char *filename);
bool readAll(JSContext *cx, FileContents &buffer)
{
return ReadCompleteFile(cx, sb_file_, buffer);
}
};
/*
* Open a source file for reading. Supports "-" and NULL to mean stdin. The
* return value must be fclosed unless it is stdin.
*/
bool
AutoFile::open(JSContext *cx, const char *filename)
{
TRACK_MEMORY_SCOPE("Javascript");
// Starboard does not support stdin.
if (!filename || strcmp(filename, "-") == 0) {
return false;
} else {
sb_file_ = SbFileOpen(filename, kSbFileOpenOnly | kSbFileRead, NULL,
NULL);
if (!SbFileIsValid(sb_file_)) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_OPEN,
filename, "No such file or directory");
return false;
}
}
return true;
}
#else // #if defined(STARBOARD)
static bool
ReadCompleteFile(JSContext *cx, FILE *fp, FileContents &buffer)
{
/* Get the complete length of the file, if possible. */
struct stat st;
int ok = fstat(fileno(fp), &st);
if (ok != 0)
return false;
if (st.st_size > 0) {
if (!buffer.reserve(st.st_size))
return false;
}
// Read in the whole file. Note that we can't assume the data's length
// is actually st.st_size, because 1) some files lie about their size
// (/dev/zero and /dev/random), and 2) reading files in text mode on
// Windows collapses "\r\n" pairs to single \n characters.
for (;;) {
int c = fast_getc(fp);
if (c == EOF)
break;
if (!buffer.append(c))
return false;
}
return true;
}
class AutoFile
{
FILE *fp_;
public:
AutoFile()
: fp_(NULL)
{}
~AutoFile()
{
if (fp_ && fp_ != stdin)
fclose(fp_);
}
FILE *fp() const { return fp_; }
bool open(JSContext *cx, const char *filename);
bool readAll(JSContext *cx, FileContents &buffer)
{
JS_ASSERT(fp_);
return ReadCompleteFile(cx, fp_, buffer);
}
};
/*
* Open a source file for reading. Supports "-" and NULL to mean stdin. The
* return value must be fclosed unless it is stdin.
*/
bool
AutoFile::open(JSContext *cx, const char *filename)
{
if (!filename || strcmp(filename, "-") == 0) {
fp_ = stdin;
} else {
fp_ = fopen(filename, "r");
if (!fp_) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_CANT_OPEN,
filename, "No such file or directory");
return false;
}
}
return true;
}
#endif // #if defined(STARBOARD)
JS::CompileOptions::CompileOptions(JSContext *cx, JSVersion version)
: principals(NULL),
originPrincipals(NULL),
version(version != JSVERSION_UNKNOWN ? version : cx->findVersion()),
versionSet(false),
utf8(false),
filename(NULL),
lineno(1),
column(0),
element(NullPtr()),
compileAndGo(cx->hasOption(JSOPTION_COMPILE_N_GO)),
forEval(false),
noScriptRval(cx->hasOption(JSOPTION_NO_SCRIPT_RVAL)),
selfHostingMode(false),
canLazilyParse(true),
sourcePolicy(SAVE_SOURCE)
{
}
JSScript *
JS::Compile(JSContext *cx, HandleObject obj, CompileOptions options,
const jschar *chars, size_t length)
{
TRACK_MEMORY_SCOPE("Javascript");
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JS_ASSERT_IF(options.principals, cx->compartment()->principals == options.principals);
AutoLastFrameCheck lfc(cx);
return frontend::CompileScript(cx, obj, NullPtr(), options, chars, length);
}
JSScript *
JS::Compile(JSContext *cx, HandleObject obj, CompileOptions options,
const char *bytes, size_t length)
{
TRACK_MEMORY_SCOPE("Javascript");
jschar *chars;
if (options.utf8)
chars = InflateUTF8String(cx, bytes, &length);
else
chars = InflateString(cx, bytes, &length);
if (!chars)
return NULL;
JSScript *script = Compile(cx, obj, options, chars, length);
js_free(chars);
return script;
}
#if defined(STARBOARD)
JSScript *
JS::Compile(JSContext *cx, HandleObject obj, CompileOptions options,
SbFile file)
{
TRACK_MEMORY_SCOPE("Javascript");
SbFileInfo info;
bool success = SbFileGetInfo(file, &info);
if (!success) {
return NULL;
}
const int64_t kFileSize = info.size;
FileContents buffer(cx);
buffer.resize(kFileSize);
if (SbFileReadAll(file, buffer.begin(), kFileSize) < 0) {
return NULL;
}
JSScript *script = Compile(cx, obj, options, buffer.begin(),
buffer.length());
return script;
}
#else
JSScript *
JS::Compile(JSContext *cx, HandleObject obj, CompileOptions options, FILE *fp)
{
TRACK_MEMORY_SCOPE("Javascript");
FileContents buffer(cx);
if (!ReadCompleteFile(cx, fp, buffer))
return NULL;
JSScript *script = Compile(cx, obj, options, buffer.begin(), buffer.length());
return script;
}
#endif
JSScript *
JS::Compile(JSContext *cx, HandleObject obj, CompileOptions options, const char *filename)
{
TRACK_MEMORY_SCOPE("Javascript");
#if defined(STARBOARD)
starboard::ScopedFile file(filename, kSbFileOpenOnly | kSbFileRead, NULL,
NULL);
if (!file.IsValid()) {
return NULL;
}
options = options.setFileAndLine(filename, 1);
JSScript *script = Compile(cx, obj, options, file.file());
#else
AutoFile file;
if (!file.open(cx, filename))
return NULL;
options = options.setFileAndLine(filename, 1);
JSScript *script = Compile(cx, obj, options, file.fp());
#endif
return script;
}
JS_PUBLIC_API(JSScript *)
JS_CompileUCScriptForPrincipals(JSContext *cx, JSObject *objArg, JSPrincipals *principals,
const jschar *chars, size_t length,
const char *filename, unsigned lineno)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
CompileOptions options(cx);
options.setPrincipals(principals)
.setFileAndLine(filename, lineno);
return Compile(cx, obj, options, chars, length);
}
JS_PUBLIC_API(JSScript *)
JS_CompileUCScript(JSContext *cx, JSObject *objArg, const jschar *chars, size_t length,
const char *filename, unsigned lineno)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
CompileOptions options(cx);
options.setFileAndLine(filename, lineno);
return Compile(cx, obj, options, chars, length);
}
JS_PUBLIC_API(JSScript *)
JS_CompileScriptForPrincipals(JSContext *cx, JSObject *objArg,
JSPrincipals *principals,
const char *ascii, size_t length,
const char *filename, unsigned lineno)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
CompileOptions options(cx);
options.setPrincipals(principals)
.setFileAndLine(filename, lineno);
return Compile(cx, obj, options, ascii, length);
}
JS_PUBLIC_API(JSScript *)
JS_CompileScript(JSContext *cx, JSObject *objArg, const char *ascii, size_t length,
const char *filename, unsigned lineno)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
CompileOptions options(cx);
options.setFileAndLine(filename, lineno);
return Compile(cx, obj, options, ascii, length);
}
JS_PUBLIC_API(JSBool)
JS_BufferIsCompilableUnit(JSContext *cx, JSObject *objArg, const char *utf8, size_t length)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
JSBool result;
JSExceptionState *exnState;
JSErrorReporter older;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
jschar *chars = InflateUTF8String(cx, utf8, &length);
if (!chars)
return JS_TRUE;
/*
* Return true on any out-of-memory error, so our caller doesn't try to
* collect more buffered source.
*/
result = JS_TRUE;
exnState = JS_SaveExceptionState(cx);
{
CompileOptions options(cx);
options.setCompileAndGo(false);
Parser<frontend::FullParseHandler> parser(cx, options, chars, length,
/* foldConstants = */ true, NULL, NULL);
older = JS_SetErrorReporter(cx, NULL);
if (!parser.parse(obj) && parser.tokenStream.isUnexpectedEOF()) {
/*
* We ran into an error. If it was because we ran out of
* source, we return false so our caller knows to try to
* collect more buffered source.
*/
result = JS_FALSE;
}
JS_SetErrorReporter(cx, older);
}
js_free(chars);
JS_RestoreExceptionState(cx, exnState);
return result;
}
JS_PUBLIC_API(JSObject *)
JS_GetGlobalFromScript(JSScript *script)
{
JS_ASSERT(!script->isCachedEval);
return &script->global();
}
JS_PUBLIC_API(JSFunction *)
JS::CompileFunction(JSContext *cx, HandleObject obj, CompileOptions options,
const char *name, unsigned nargs, const char **argnames,
const jschar *chars, size_t length)
{
TRACK_MEMORY_SCOPE("Javascript");
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JS_ASSERT_IF(options.principals, cx->compartment()->principals == options.principals);
AutoLastFrameCheck lfc(cx);
RootedAtom funAtom(cx);
if (name) {
funAtom = Atomize(cx, name, strlen(name));
if (!funAtom)
return NULL;
}
AutoNameVector formals(cx);
for (unsigned i = 0; i < nargs; i++) {
RootedAtom argAtom(cx, Atomize(cx, argnames[i], strlen(argnames[i])));
if (!argAtom || !formals.append(argAtom->asPropertyName()))
return NULL;
}
RootedFunction fun(cx, NewFunction(cx, NullPtr(), NULL, 0, JSFunction::INTERPRETED, obj,
funAtom, JSFunction::FinalizeKind, TenuredObject));
if (!fun)
return NULL;
if (!frontend::CompileFunctionBody(cx, &fun, options, formals, chars, length))
return NULL;
if (obj && funAtom) {
Rooted<jsid> id(cx, AtomToId(funAtom));
RootedValue value(cx, ObjectValue(*fun));
if (!JSObject::defineGeneric(cx, obj, id, value, NULL, NULL, JSPROP_ENUMERATE))
return NULL;
}
return fun;
}
JS_PUBLIC_API(JSFunction *)
JS::CompileFunction(JSContext *cx, HandleObject obj, CompileOptions options,
const char *name, unsigned nargs, const char **argnames,
const char *bytes, size_t length)
{
TRACK_MEMORY_SCOPE("Javascript");
jschar *chars;
if (options.utf8)
chars = InflateUTF8String(cx, bytes, &length);
else
chars = InflateString(cx, bytes, &length);
if (!chars)
return NULL;
JSFunction *fun = CompileFunction(cx, obj, options, name, nargs, argnames, chars, length);
js_free(chars);
return fun;
}
JS_PUBLIC_API(JSFunction *)
JS_CompileUCFunction(JSContext *cx, JSObject *objArg, const char *name,
unsigned nargs, const char **argnames,
const jschar *chars, size_t length,
const char *filename, unsigned lineno)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
CompileOptions options(cx);
options.setFileAndLine(filename, lineno);
return CompileFunction(cx, obj, options, name, nargs, argnames, chars, length);
}
JS_PUBLIC_API(JSFunction *)
JS_CompileFunctionForPrincipals(JSContext *cx, JSObject *objArg,
JSPrincipals *principals, const char *name,
unsigned nargs, const char **argnames,
const char *ascii, size_t length,
const char *filename, unsigned lineno)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
CompileOptions options(cx);
options.setPrincipals(principals)
.setFileAndLine(filename, lineno);
return CompileFunction(cx, obj, options, name, nargs, argnames, ascii, length);
}
JS_PUBLIC_API(JSFunction *)
JS_CompileFunction(JSContext *cx, JSObject *objArg, const char *name,
unsigned nargs, const char **argnames,
const char *ascii, size_t length,
const char *filename, unsigned lineno)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
CompileOptions options(cx);
options.setFileAndLine(filename, lineno);
return CompileFunction(cx, obj, options, name, nargs, argnames, ascii, length);
}
JS_PUBLIC_API(JSString *)
JS_DecompileScript(JSContext *cx, JSScript *scriptArg, const char *name, unsigned indent)
{
TRACK_MEMORY_SCOPE("Javascript");
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedScript script(cx, scriptArg);
RootedFunction fun(cx, script->function());
if (fun)
return JS_DecompileFunction(cx, fun, indent);
bool haveSource = script->scriptSource()->hasSourceData();
if (!haveSource && !JSScript::loadSource(cx, script, &haveSource))
return NULL;
return haveSource ? script->sourceData(cx) : js_NewStringCopyZ<CanGC>(cx, "[no source]");
}
JS_PUBLIC_API(JSString *)
JS_DecompileFunction(JSContext *cx, JSFunction *funArg, unsigned indent)
{
TRACK_MEMORY_SCOPE("Javascript");
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, funArg);
RootedFunction fun(cx, funArg);
return FunctionToString(cx, fun, false, !(indent & JS_DONT_PRETTY_PRINT));
}
JS_PUBLIC_API(JSString *)
JS_DecompileFunctionBody(JSContext *cx, JSFunction *funArg, unsigned indent)
{
TRACK_MEMORY_SCOPE("Javascript");
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, funArg);
RootedFunction fun(cx, funArg);
return FunctionToString(cx, fun, true, !(indent & JS_DONT_PRETTY_PRINT));
}
JS_NEVER_INLINE JS_PUBLIC_API(JSBool)
JS_ExecuteScript(JSContext *cx, JSObject *objArg, JSScript *scriptArg, jsval *rval)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
RootedScript script(cx, scriptArg);
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
if (cx->compartment() != obj->compartment())
*(volatile int *) 0 = 0xf0;
AutoLastFrameCheck lfc(cx);
/*
* Mozilla caches pre-compiled scripts (e.g., in the XUL prototype cache)
* and runs them against multiple globals. With a compartment per global,
* this requires cloning the pre-compiled script into each new global.
* Since each script gets run once, there is no point in trying to cache
* this clone. Ideally, this would be handled at some pinch point in
* mozilla, but there doesn't seem to be one, so we handle it here.
*/
if (script->compartment() != obj->compartment()) {
script = CloneScript(cx, NullPtr(), NullPtr(), script);
if (!script.get())
return false;
} else {
script = scriptArg;
}
return Execute(cx, script, *obj, rval);
}
JS_PUBLIC_API(JSBool)
JS_ExecuteScriptVersion(JSContext *cx, JSObject *objArg, JSScript *script, jsval *rval,
JSVersion version)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
return JS_ExecuteScript(cx, obj, script, rval);
}
static const unsigned LARGE_SCRIPT_LENGTH = 500*1024;
extern JS_PUBLIC_API(bool)
JS::Evaluate(JSContext *cx, HandleObject obj, CompileOptions options,
const jschar *chars, size_t length, jsval *rval)
{
TRACK_MEMORY_SCOPE("Javascript");
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JS_ASSERT_IF(options.principals, cx->compartment()->principals == options.principals);
AutoLastFrameCheck lfc(cx);
options.setCompileAndGo(obj->is<GlobalObject>());
options.setNoScriptRval(!rval);
SourceCompressionToken sct(cx);
RootedScript script(cx, frontend::CompileScript(cx, obj, NullPtr(), options,
chars, length, NULL, 0, &sct));
if (!script)
return false;
JS_ASSERT(script->getVersion() == options.version);
bool result = Execute(cx, script, *obj, rval);
if (!sct.complete())
result = false;
// After evaluation, the compiled script will not be run again.
// script->ensureRanAnalysis allocated 1 analyze::Bytecode for every opcode
// which for large scripts means significant memory. Perform a GC eagerly
// to clear out this analysis data before anything happens to inhibit the
// flushing of this memory (such as setting requestAnimationFrame).
if (script->length > LARGE_SCRIPT_LENGTH) {
script = NULL;
PrepareZoneForGC(cx->zone());
GC(cx->runtime(), GC_NORMAL, gcreason::FINISH_LARGE_EVALUTE);
}
return result;
}
extern JS_PUBLIC_API(bool)
JS::Evaluate(JSContext *cx, HandleObject obj, CompileOptions options,
const char *bytes, size_t length, jsval *rval)
{
TRACK_MEMORY_SCOPE("Javascript");
jschar *chars;
if (options.utf8)
chars = InflateUTF8String(cx, bytes, &length);
else
chars = InflateString(cx, bytes, &length);
if (!chars)
return false;
bool ok = Evaluate(cx, obj, options, chars, length, rval);
js_free(chars);
return ok;
}
extern JS_PUBLIC_API(bool)
JS::Evaluate(JSContext *cx, HandleObject obj, CompileOptions options,
const char *filename, jsval *rval)
{
TRACK_MEMORY_SCOPE("Javascript");
#if defined(STARBOARD)
starboard::ScopedFile file(filename, kSbFileOpenOnly | kSbFileRead, NULL,
NULL);
const int64_t kFileSize = file.GetSize();
FileContents buffer(cx);
buffer.resize(kFileSize);
if (file.ReadAll(buffer.begin(), kFileSize) < 0) {
return false;
}
#else
FileContents buffer(cx);
{
AutoFile file;
if (!file.open(cx, filename) || !file.readAll(cx, buffer))
return false;
}
#endif
options.setFileAndLine(filename, 1);
return Evaluate(cx, obj, options, buffer.begin(), buffer.length(), rval);
}
JS_PUBLIC_API(JSBool)
JS_EvaluateUCScriptForPrincipals(JSContext *cx, JSObject *objArg,
JSPrincipals *principals,
const jschar *chars, unsigned length,
const char *filename, unsigned lineno,
jsval *rval)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
CompileOptions options(cx);
options.setPrincipals(principals)
.setFileAndLine(filename, lineno);
return Evaluate(cx, obj, options, chars, length, rval);
}
JS_PUBLIC_API(JSBool)
JS_EvaluateUCScriptForPrincipalsVersion(JSContext *cx, JSObject *objArg,
JSPrincipals *principals,
const jschar *chars, unsigned length,
const char *filename, unsigned lineno,
jsval *rval, JSVersion version)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
CompileOptions options(cx);
options.setPrincipals(principals)
.setFileAndLine(filename, lineno)
.setVersion(version);
return Evaluate(cx, obj, options, chars, length, rval);
}
extern JS_PUBLIC_API(JSBool)
JS_EvaluateUCScriptForPrincipalsVersionOrigin(JSContext *cx, JSObject *objArg,
JSPrincipals *principals,
JSPrincipals *originPrincipals,
const jschar *chars, unsigned length,
const char *filename, unsigned lineno,
jsval *rval, JSVersion version)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
CompileOptions options(cx);
options.setPrincipals(principals)
.setOriginPrincipals(originPrincipals)
.setFileAndLine(filename, lineno)
.setVersion(version);
return Evaluate(cx, obj, options, chars, length, rval);
}
JS_PUBLIC_API(JSBool)
JS_EvaluateUCScript(JSContext *cx, JSObject *objArg, const jschar *chars, unsigned length,
const char *filename, unsigned lineno, jsval *rval)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
CompileOptions options(cx);
options.setFileAndLine(filename, lineno);
return Evaluate(cx, obj, options, chars, length, rval);
}
/* Ancient unsigned nbytes is part of API/ABI, so use size_t length local. */
JS_PUBLIC_API(JSBool)
JS_EvaluateScriptForPrincipals(JSContext *cx, JSObject *objArg, JSPrincipals *principals,
const char *bytes, unsigned nbytes,
const char *filename, unsigned lineno, jsval *rval)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
CompileOptions options(cx);
options.setPrincipals(principals)
.setFileAndLine(filename, lineno);
return Evaluate(cx, obj, options, bytes, nbytes, rval);
}
JS_PUBLIC_API(JSBool)
JS_EvaluateScriptForPrincipalsVersion(JSContext *cx, JSObject *objArg, JSPrincipals *principals,
const char *bytes, unsigned nbytes,
const char *filename, unsigned lineno, jsval *rval,
JSVersion version)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
CompileOptions options(cx);
options.setPrincipals(principals)
.setVersion(version)
.setFileAndLine(filename, lineno);
return Evaluate(cx, obj, options, bytes, nbytes, rval);
}
JS_PUBLIC_API(JSBool)
JS_EvaluateScript(JSContext *cx, JSObject *objArg, const char *bytes, unsigned nbytes,
const char *filename, unsigned lineno, jsval *rval)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
CompileOptions options(cx);
options.setFileAndLine(filename, lineno);
return Evaluate(cx, obj, options, bytes, nbytes, rval);
}
JS_PUBLIC_API(JSBool)
JS_CallFunction(JSContext *cx, JSObject *objArg, JSFunction *fun, unsigned argc, jsval *argv,
jsval *rval)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, fun, JSValueArray(argv, argc));
AutoLastFrameCheck lfc(cx);
return Invoke(cx, ObjectOrNullValue(obj), ObjectValue(*fun), argc, argv, rval);
}
JS_PUBLIC_API(JSBool)
JS_CallFunctionName(JSContext *cx, JSObject *objArg, const char *name, unsigned argc, jsval *argv,
jsval *rval)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, JSValueArray(argv, argc));
AutoLastFrameCheck lfc(cx);
JSAtom *atom = Atomize(cx, name, strlen(name));
if (!atom)
return false;
RootedValue v(cx);
RootedId id(cx, AtomToId(atom));
return JSObject::getGeneric(cx, obj, obj, id, &v) &&
Invoke(cx, ObjectOrNullValue(obj), v, argc, argv, rval);
}
JS_PUBLIC_API(JSBool)
JS_CallFunctionValue(JSContext *cx, JSObject *objArg, jsval fval, unsigned argc, jsval *argv,
jsval *rval)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
JS_THREADSAFE_ASSERT(cx->compartment() != cx->runtime()->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, fval, JSValueArray(argv, argc));
AutoLastFrameCheck lfc(cx);
return Invoke(cx, ObjectOrNullValue(obj), fval, argc, argv, rval);
}
JS_PUBLIC_API(bool)
JS::Call(JSContext *cx, jsval thisv, jsval fval, unsigned argc, jsval *argv, jsval *rval)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, thisv, fval, JSValueArray(argv, argc));
AutoLastFrameCheck lfc(cx);
return Invoke(cx, thisv, fval, argc, argv, rval);
}
JS_PUBLIC_API(JSObject *)
JS_New(JSContext *cx, JSObject *ctorArg, unsigned argc, jsval *argv)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject ctor(cx, ctorArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, ctor, JSValueArray(argv, argc));
AutoLastFrameCheck lfc(cx);
// This is not a simple variation of JS_CallFunctionValue because JSOP_NEW
// is not a simple variation of JSOP_CALL. We have to determine what class
// of object to create, create it, and clamp the return value to an object,
// among other details. InvokeConstructor does the hard work.
InvokeArgs args(cx);
if (!args.init(argc))
return NULL;
args.setCallee(ObjectValue(*ctor));
args.setThis(NullValue());
PodCopy(args.array(), argv, argc);
if (!InvokeConstructor(cx, args))
return NULL;
if (!args.rval().isObject()) {
/*
* Although constructors may return primitives (via proxies), this
* API is asking for an object, so we report an error.
*/
JSAutoByteString bytes;
if (js_ValueToPrintable(cx, args.rval(), &bytes)) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_BAD_NEW_RESULT,
bytes.ptr());
}
return NULL;
}
return &args.rval().toObject();
}
JS_PUBLIC_API(JSOperationCallback)
JS_SetOperationCallback(JSContext *cx, JSOperationCallback callback)
{
JSOperationCallback old = cx->operationCallback;
cx->operationCallback = callback;
return old;
}
JS_PUBLIC_API(JSOperationCallback)
JS_GetOperationCallback(JSContext *cx)
{
return cx->operationCallback;
}
JS_PUBLIC_API(void)
JS_TriggerOperationCallback(JSRuntime *rt)
{
TRACK_MEMORY_SCOPE("Javascript");
rt->triggerOperationCallback();
}
JS_PUBLIC_API(JSBool)
JS_IsRunning(JSContext *cx)
{
return cx->currentlyRunning();
}
JS_PUBLIC_API(JSBool)
JS_SaveFrameChain(JSContext *cx)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdleOrIterating(cx);
CHECK_REQUEST(cx);
return cx->saveFrameChain();
}
JS_PUBLIC_API(void)
JS_RestoreFrameChain(JSContext *cx)
{
AssertHeapIsIdleOrIterating(cx);
CHECK_REQUEST(cx);
cx->restoreFrameChain();
}
#ifdef MOZ_TRACE_JSCALLS
JS_PUBLIC_API(void)
JS_SetFunctionCallback(JSContext *cx, JSFunctionCallback fcb)
{
cx->functionCallback = fcb;
}
JS_PUBLIC_API(JSFunctionCallback)
JS_GetFunctionCallback(JSContext *cx)
{
return cx->functionCallback;
}
#endif
/************************************************************************/
JS_PUBLIC_API(JSString *)
JS_NewStringCopyN(JSContext *cx, const char *s, size_t n)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_NewStringCopyN<CanGC>(cx, s, n);
}
JS_PUBLIC_API(JSString *)
JS_NewStringCopyZ(JSContext *cx, const char *s)
{
TRACK_MEMORY_SCOPE("Javascript");
size_t n;
jschar *js;
JSString *str;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!s || !*s)
return cx->runtime()->emptyString;
n = strlen(s);
js = InflateString(cx, s, &n);
if (!js)
return NULL;
str = js_NewString<CanGC>(cx, js, n);
if (!str)
js_free(js);
return str;
}
JS_PUBLIC_API(JSBool)
JS_StringHasBeenInterned(JSContext *cx, JSString *str)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!str->isAtom())
return false;
return AtomIsInterned(cx, &str->asAtom());
}
JS_PUBLIC_API(jsid)
INTERNED_STRING_TO_JSID(JSContext *cx, JSString *str)
{
JS_ASSERT(str);
JS_ASSERT(((size_t)str & JSID_TYPE_MASK) == 0);
JS_ASSERT_IF(cx, JS_StringHasBeenInterned(cx, str));
return AtomToId(&str->asAtom());
}
JS_PUBLIC_API(JSString *)
JS_InternJSString(JSContext *cx, JSString *str)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSAtom *atom = AtomizeString<CanGC>(cx, str, InternAtom);
JS_ASSERT_IF(atom, JS_StringHasBeenInterned(cx, atom));
return atom;
}
JS_PUBLIC_API(JSString *)
JS_InternString(JSContext *cx, const char *s)
{
TRACK_MEMORY_SCOPE("Javascript");
return JS_InternStringN(cx, s, strlen(s));
}
JS_PUBLIC_API(JSString *)
JS_InternStringN(JSContext *cx, const char *s, size_t length)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSAtom *atom = Atomize(cx, s, length, InternAtom);
JS_ASSERT_IF(atom, JS_StringHasBeenInterned(cx, atom));
return atom;
}
JS_PUBLIC_API(JSString *)
JS_NewUCString(JSContext *cx, jschar *chars, size_t length)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_NewString<CanGC>(cx, chars, length);
}
JS_PUBLIC_API(JSString *)
JS_NewUCStringCopyN(JSContext *cx, const jschar *s, size_t n)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_NewStringCopyN<CanGC>(cx, s, n);
}
JS_PUBLIC_API(JSString *)
JS_NewUCStringCopyZ(JSContext *cx, const jschar *s)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!s)
return cx->runtime()->emptyString;
return js_NewStringCopyZ<CanGC>(cx, s);
}
JS_PUBLIC_API(JSString *)
JS_InternUCStringN(JSContext *cx, const jschar *s, size_t length)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSAtom *atom = AtomizeChars<CanGC>(cx, s, length, InternAtom);
JS_ASSERT_IF(atom, JS_StringHasBeenInterned(cx, atom));
return atom;
}
JS_PUBLIC_API(JSString *)
JS_InternUCString(JSContext *cx, const jschar *s)
{
TRACK_MEMORY_SCOPE("Javascript");
return JS_InternUCStringN(cx, s, js_strlen(s));
}
JS_PUBLIC_API(size_t)
JS_GetStringLength(JSString *str)
{
return str->length();
}
JS_PUBLIC_API(const jschar *)
JS_GetStringCharsZ(JSContext *cx, JSString *str)
{
size_t dummy;
return JS_GetStringCharsZAndLength(cx, str, &dummy);
}
JS_PUBLIC_API(const jschar *)
JS_GetStringCharsZAndLength(JSContext *cx, JSString *str, size_t *plength)
{
/*
* Don't require |cx->compartment()| to be |str|'s compartment. We don't need
* it, and it's annoying for callers.
*/
JS_ASSERT(plength);
AssertHeapIsIdleOrStringIsFlat(cx, str);
CHECK_REQUEST(cx);
JSFlatString *flat = str->ensureFlat(cx);
if (!flat)
return NULL;
*plength = flat->length();
return flat->chars();
}
JS_PUBLIC_API(const jschar *)
JS_GetStringCharsAndLength(JSContext *cx, JSString *str, size_t *plength)
{
JS_ASSERT(plength);
AssertHeapIsIdleOrStringIsFlat(cx, str);
CHECK_REQUEST(cx);
assertSameCompartment(cx, str);
JSLinearString *linear = str->ensureLinear(cx);
if (!linear)
return NULL;
*plength = linear->length();
return linear->chars();
}
JS_PUBLIC_API(const jschar *)
JS_GetInternedStringChars(JSString *str)
{
TRACK_MEMORY_SCOPE("Javascript");
JS_ASSERT(str->isAtom());
JSFlatString *flat = str->ensureFlat(NULL);
if (!flat)
return NULL;
return flat->chars();
}
JS_PUBLIC_API(const jschar *)
JS_GetInternedStringCharsAndLength(JSString *str, size_t *plength)
{
JS_ASSERT(str->isAtom());
JS_ASSERT(plength);
JSFlatString *flat = str->ensureFlat(NULL);
if (!flat)
return NULL;
*plength = flat->length();
return flat->chars();
}
extern JS_PUBLIC_API(JSFlatString *)
JS_FlattenString(JSContext *cx, JSString *str)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, str);
JSFlatString *flat = str->ensureFlat(cx);
if (!flat)
return NULL;
return flat;
}
extern JS_PUBLIC_API(const jschar *)
JS_GetFlatStringChars(JSFlatString *str)
{
return str->chars();
}
JS_PUBLIC_API(JSBool)
JS_CompareStrings(JSContext *cx, JSString *str1, JSString *str2, int32_t *result)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return CompareStrings(cx, str1, str2, result);
}
JS_PUBLIC_API(JSBool)
JS_StringEqualsAscii(JSContext *cx, JSString *str, const char *asciiBytes, JSBool *match)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSLinearString *linearStr = str->ensureLinear(cx);
if (!linearStr)
return false;
*match = StringEqualsAscii(linearStr, asciiBytes);
return true;
}
JS_PUBLIC_API(JSBool)
JS_FlatStringEqualsAscii(JSFlatString *str, const char *asciiBytes)
{
return StringEqualsAscii(str, asciiBytes);
}
JS_PUBLIC_API(size_t)
JS_PutEscapedFlatString(char *buffer, size_t size, JSFlatString *str, char quote)
{
return PutEscapedString(buffer, size, str, quote);
}
JS_PUBLIC_API(size_t)
JS_PutEscapedString(JSContext *cx, char *buffer, size_t size, JSString *str, char quote)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
JSLinearString *linearStr = str->ensureLinear(cx);
if (!linearStr)
return size_t(-1);
return PutEscapedString(buffer, size, linearStr, quote);
}
JS_PUBLIC_API(JSBool)
JS_FileEscapedString(FILE *fp, JSString *str, char quote)
{
TRACK_MEMORY_SCOPE("Javascript");
JSLinearString *linearStr = str->ensureLinear(NULL);
return linearStr && FileEscapedString(fp, linearStr, quote);
}
JS_PUBLIC_API(JSString *)
JS_NewGrowableString(JSContext *cx, jschar *chars, size_t length)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_NewString<CanGC>(cx, chars, length);
}
JS_PUBLIC_API(JSString *)
JS_NewDependentString(JSContext *cx, JSString *str, size_t start, size_t length)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_NewDependentString(cx, str, start, length);
}
JS_PUBLIC_API(JSString *)
JS_ConcatStrings(JSContext *cx, JSString *left, JSString *right)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
Rooted<JSString*> lstr(cx, left);
Rooted<JSString*> rstr(cx, right);
return ConcatStrings<CanGC>(cx, lstr, rstr);
}
JS_PUBLIC_API(JSBool)
JS_DecodeBytes(JSContext *cx, const char *src, size_t srclen, jschar *dst, size_t *dstlenp)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return InflateStringToBuffer(cx, src, srclen, dst, dstlenp);
}
JS_PUBLIC_API(char *)
JS_EncodeString(JSContext *cx, JSString *str)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSLinearString *linear = str->ensureLinear(cx);
if (!linear)
return NULL;
return LossyTwoByteCharsToNewLatin1CharsZ(cx, linear->range()).c_str();
}
JS_PUBLIC_API(char *)
JS_EncodeStringToUTF8(JSContext *cx, JSString *str)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSLinearString *linear = str->ensureLinear(cx);
if (!linear)
return NULL;
return TwoByteCharsToNewUTF8CharsZ(cx, linear->range()).c_str();
}
JS_PUBLIC_API(size_t)
JS_GetStringEncodingLength(JSContext *cx, JSString *str)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
const jschar *chars = str->getChars(cx);
if (!chars)
return size_t(-1);
return str->length();
}
JS_PUBLIC_API(size_t)
JS_EncodeStringToBuffer(JSContext *cx, JSString *str, char *buffer, size_t length)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
/*
* FIXME bug 612141 - fix DeflateStringToBuffer interface so the result
* would allow to distinguish between insufficient buffer and encoding
* error.
*/
size_t writtenLength = length;
const jschar *chars = str->getChars(NULL);
if (!chars)
return size_t(-1);
if (DeflateStringToBuffer(NULL, chars, str->length(), buffer, &writtenLength)) {
JS_ASSERT(writtenLength <= length);
return writtenLength;
}
JS_ASSERT(writtenLength <= length);
size_t necessaryLength = str->length();
if (necessaryLength == size_t(-1))
return size_t(-1);
JS_ASSERT(writtenLength == length); // C strings are NOT encoded.
return necessaryLength;
}
JS_PUBLIC_API(JSBool)
JS_Stringify(JSContext *cx, jsval *vp, JSObject *replacerArg, jsval space,
JSONWriteCallback callback, void *data)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject replacer(cx, replacerArg);
RootedValue value(cx, *vp);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, replacer, space);
StringBuffer sb(cx);
if (!js_Stringify(cx, &value, replacer, space, sb))
return false;
*vp = value;
if (sb.empty()) {
HandlePropertyName null = cx->names().null;
return callback(null->chars(), null->length(), data);
}
return callback(sb.begin(), sb.length(), data);
}
JS_PUBLIC_API(JSBool)
JS_ParseJSON(JSContext *cx, const jschar *chars, uint32_t len, JS::MutableHandleValue vp)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedValue reviver(cx, NullValue()), value(cx);
return ParseJSONWithReviver(cx, JS::StableCharPtr(chars, len), len, reviver, vp);
}
JS_PUBLIC_API(JSBool)
JS_ParseJSONWithReviver(JSContext *cx, const jschar *chars, uint32_t len, jsval reviverArg, jsval *vp)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedValue reviver(cx, reviverArg), value(cx);
if (!ParseJSONWithReviver(cx, StableCharPtr(chars, len), len, reviver, &value))
return false;
*vp = value;
return true;
}
JS_PUBLIC_API(JSBool)
JS_ReadStructuredClone(JSContext *cx, uint64_t *buf, size_t nbytes,
uint32_t version, jsval *vp,
const JSStructuredCloneCallbacks *optionalCallbacks,
void *closure)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (version > JS_STRUCTURED_CLONE_VERSION) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_BAD_CLONE_VERSION);
return false;
}
const JSStructuredCloneCallbacks *callbacks =
optionalCallbacks ?
optionalCallbacks :
cx->runtime()->structuredCloneCallbacks;
return ReadStructuredClone(cx, buf, nbytes, vp, callbacks, closure);
}
JS_PUBLIC_API(JSBool)
JS_WriteStructuredClone(JSContext *cx, jsval valueArg, uint64_t **bufp, size_t *nbytesp,
const JSStructuredCloneCallbacks *optionalCallbacks,
void *closure, jsval transferable)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedValue value(cx, valueArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
const JSStructuredCloneCallbacks *callbacks =
optionalCallbacks ?
optionalCallbacks :
cx->runtime()->structuredCloneCallbacks;
return WriteStructuredClone(cx, value, (uint64_t **) bufp, nbytesp,
callbacks, closure, transferable);
}
JS_PUBLIC_API(JSBool)
JS_ClearStructuredClone(const uint64_t *data, size_t nbytes)
{
return ClearStructuredClone(data, nbytes);
}
JS_PUBLIC_API(JSBool)
JS_StructuredCloneHasTransferables(const uint64_t *data, size_t nbytes,
JSBool *hasTransferable)
{
bool transferable;
if (!StructuredCloneHasTransferObjects(data, nbytes, &transferable))
return false;
*hasTransferable = transferable;
return true;
}
JS_PUBLIC_API(JSBool)
JS_StructuredClone(JSContext *cx, jsval valueArg, jsval *vp,
const JSStructuredCloneCallbacks *optionalCallbacks,
void *closure)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedValue value(cx, valueArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
const JSStructuredCloneCallbacks *callbacks =
optionalCallbacks ?
optionalCallbacks :
cx->runtime()->structuredCloneCallbacks;
JSAutoStructuredCloneBuffer buf;
return buf.write(cx, value, callbacks, closure) &&
buf.read(cx, vp, callbacks, closure);
}
void
JSAutoStructuredCloneBuffer::clear()
{
if (data_) {
ClearStructuredClone(data_, nbytes_);
data_ = NULL;
nbytes_ = 0;
version_ = 0;
}
}
void
JSAutoStructuredCloneBuffer::adopt(uint64_t *data, size_t nbytes, uint32_t version)
{
clear();
data_ = data;
nbytes_ = nbytes;
version_ = version;
}
bool
JSAutoStructuredCloneBuffer::copy(const uint64_t *srcData, size_t nbytes, uint32_t version)
{
// transferable objects cannot be copied
bool hasTransferable;
if (!StructuredCloneHasTransferObjects(data_, nbytes_, &hasTransferable) ||
hasTransferable)
return false;
uint64_t *newData = static_cast<uint64_t *>(js_malloc(nbytes));
if (!newData)
return false;
js_memcpy(newData, srcData, nbytes);
clear();
data_ = newData;
nbytes_ = nbytes;
version_ = version;
return true;
}
void
JSAutoStructuredCloneBuffer::steal(uint64_t **datap, size_t *nbytesp, uint32_t *versionp)
{
*datap = data_;
*nbytesp = nbytes_;
if (versionp)
*versionp = version_;
data_ = NULL;
nbytes_ = 0;
version_ = 0;
}
bool
JSAutoStructuredCloneBuffer::read(JSContext *cx, jsval *vp,
const JSStructuredCloneCallbacks *optionalCallbacks,
void *closure)
{
JS_ASSERT(cx);
JS_ASSERT(data_);
return !!JS_ReadStructuredClone(cx, data_, nbytes_, version_, vp,
optionalCallbacks, closure);
}
bool
JSAutoStructuredCloneBuffer::write(JSContext *cx, jsval valueArg,
const JSStructuredCloneCallbacks *optionalCallbacks,
void *closure)
{
jsval transferable = JSVAL_VOID;
return write(cx, valueArg, transferable, optionalCallbacks, closure);
}
bool
JSAutoStructuredCloneBuffer::write(JSContext *cx, jsval valueArg,
jsval transferable,
const JSStructuredCloneCallbacks *optionalCallbacks,
void *closure)
{
RootedValue value(cx, valueArg);
clear();
bool ok = !!JS_WriteStructuredClone(cx, value, &data_, &nbytes_,
optionalCallbacks, closure,
transferable);
if (!ok) {
data_ = NULL;
nbytes_ = 0;
version_ = JS_STRUCTURED_CLONE_VERSION;
}
return ok;
}
void
JSAutoStructuredCloneBuffer::swap(JSAutoStructuredCloneBuffer &other)
{
uint64_t *data = other.data_;
size_t nbytes = other.nbytes_;
uint32_t version = other.version_;
other.data_ = this->data_;
other.nbytes_ = this->nbytes_;
other.version_ = this->version_;
this->data_ = data;
this->nbytes_ = nbytes;
this->version_ = version;
}
JS_PUBLIC_API(void)
JS_SetStructuredCloneCallbacks(JSRuntime *rt, const JSStructuredCloneCallbacks *callbacks)
{
rt->structuredCloneCallbacks = callbacks;
}
JS_PUBLIC_API(JSBool)
JS_ReadUint32Pair(JSStructuredCloneReader *r, uint32_t *p1, uint32_t *p2)
{
return r->input().readPair((uint32_t *) p1, (uint32_t *) p2);
}
JS_PUBLIC_API(JSBool)
JS_ReadBytes(JSStructuredCloneReader *r, void *p, size_t len)
{
return r->input().readBytes(p, len);
}
JS_PUBLIC_API(JSBool)
JS_WriteUint32Pair(JSStructuredCloneWriter *w, uint32_t tag, uint32_t data)
{
return w->output().writePair(tag, data);
}
JS_PUBLIC_API(JSBool)
JS_WriteBytes(JSStructuredCloneWriter *w, const void *p, size_t len)
{
return w->output().writeBytes(p, len);
}
/************************************************************************/
JS_PUBLIC_API(void)
JS_ReportError(JSContext *cx, const char *format, ...)
{
va_list ap;
AssertHeapIsIdle(cx);
va_start(ap, format);
js_ReportErrorVA(cx, JSREPORT_ERROR, format, ap);
va_end(ap);
}
JS_PUBLIC_API(void)
JS_ReportErrorNumber(JSContext *cx, JSErrorCallback errorCallback,
void *userRef, const unsigned errorNumber, ...)
{
va_list ap;
va_start(ap, errorNumber);
JS_ReportErrorNumberVA(cx, errorCallback, userRef, errorNumber, ap);
va_end(ap);
}
JS_PUBLIC_API(void)
JS_ReportErrorNumberVA(JSContext *cx, JSErrorCallback errorCallback,
void *userRef, const unsigned errorNumber,
va_list ap)
{
AssertHeapIsIdle(cx);
js_ReportErrorNumberVA(cx, JSREPORT_ERROR, errorCallback, userRef,
errorNumber, ArgumentsAreASCII, ap);
}
JS_PUBLIC_API(void)
JS_ReportErrorNumberUC(JSContext *cx, JSErrorCallback errorCallback,
void *userRef, const unsigned errorNumber, ...)
{
va_list ap;
AssertHeapIsIdle(cx);
va_start(ap, errorNumber);
js_ReportErrorNumberVA(cx, JSREPORT_ERROR, errorCallback, userRef,
errorNumber, ArgumentsAreUnicode, ap);
va_end(ap);
}
JS_PUBLIC_API(void)
JS_ReportErrorNumberUCArray(JSContext *cx, JSErrorCallback errorCallback,
void *userRef, const unsigned errorNumber,
const jschar **args)
{
AssertHeapIsIdle(cx);
js_ReportErrorNumberUCArray(cx, JSREPORT_ERROR, errorCallback, userRef,
errorNumber, args);
}
JS_PUBLIC_API(JSBool)
JS_ReportWarning(JSContext *cx, const char *format, ...)
{
va_list ap;
JSBool ok;
AssertHeapIsIdle(cx);
va_start(ap, format);
ok = js_ReportErrorVA(cx, JSREPORT_WARNING, format, ap);
va_end(ap);
return ok;
}
JS_PUBLIC_API(JSBool)
JS_ReportErrorFlagsAndNumber(JSContext *cx, unsigned flags,
JSErrorCallback errorCallback, void *userRef,
const unsigned errorNumber, ...)
{
va_list ap;
JSBool ok;
AssertHeapIsIdle(cx);
va_start(ap, errorNumber);
ok = js_ReportErrorNumberVA(cx, flags, errorCallback, userRef,
errorNumber, ArgumentsAreASCII, ap);
va_end(ap);
return ok;
}
JS_PUBLIC_API(JSBool)
JS_ReportErrorFlagsAndNumberUC(JSContext *cx, unsigned flags,
JSErrorCallback errorCallback, void *userRef,
const unsigned errorNumber, ...)
{
va_list ap;
JSBool ok;
AssertHeapIsIdle(cx);
va_start(ap, errorNumber);
ok = js_ReportErrorNumberVA(cx, flags, errorCallback, userRef,
errorNumber, ArgumentsAreUnicode, ap);
va_end(ap);
return ok;
}
JS_PUBLIC_API(void)
JS_ReportOutOfMemory(JSContext *cx)
{
js_ReportOutOfMemory(cx);
}
JS_PUBLIC_API(void)
JS_ReportAllocationOverflow(JSContext *cx)
{
js_ReportAllocationOverflow(cx);
}
JS_PUBLIC_API(JSErrorReporter)
JS_GetErrorReporter(JSContext *cx)
{
return cx->errorReporter;
}
JS_PUBLIC_API(JSErrorReporter)
JS_SetErrorReporter(JSContext *cx, JSErrorReporter er)
{
JSErrorReporter older;
older = cx->errorReporter;
cx->errorReporter = er;
return older;
}
/************************************************************************/
/*
* Dates.
*/
JS_PUBLIC_API(JSObject *)
JS_NewDateObject(JSContext *cx, int year, int mon, int mday, int hour, int min, int sec)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_NewDateObject(cx, year, mon, mday, hour, min, sec);
}
JS_PUBLIC_API(JSObject *)
JS_NewDateObjectMsec(JSContext *cx, double msec)
{
TRACK_MEMORY_SCOPE("Javascript");
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_NewDateObjectMsec(cx, msec);
}
JS_PUBLIC_API(JSBool)
JS_ObjectIsDate(JSContext *cx, JSObject *objArg)
{
RootedObject obj(cx, objArg);
assertSameCompartment(cx, obj);
return ObjectClassIs(obj, ESClass_Date, cx);
}
JS_PUBLIC_API(void)
JS_ClearDateCaches(JSContext *cx)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
cx->runtime()->dateTimeInfo.updateTimeZoneAdjustment();
}
/************************************************************************/
/*
* Regular Expressions.
*/
JS_PUBLIC_API(JSObject *)
JS_NewRegExpObject(JSContext *cx, JSObject *objArg, char *bytes, size_t length, unsigned flags)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
jschar *chars = InflateString(cx, bytes, &length);
if (!chars)
return NULL;
RegExpStatics *res = obj->as<GlobalObject>().getRegExpStatics();
RegExpObject *reobj = RegExpObject::create(cx, res, chars, length,
RegExpFlag(flags), NULL);
js_free(chars);
return reobj;
}
JS_PUBLIC_API(JSObject *)
JS_NewUCRegExpObject(JSContext *cx, JSObject *objArg, jschar *chars, size_t length, unsigned flags)
{
TRACK_MEMORY_SCOPE("Javascript");
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RegExpStatics *res = obj->as<GlobalObject>().getRegExpStatics();
return RegExpObject::create(cx, res, chars, length,
RegExpFlag(flags), NULL);
}
JS_PUBLIC_API(void)
JS_SetRegExpInput(JSContext *cx, JSObject *objArg, JSString *input, JSBool multiline)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, input);
obj->as<GlobalObject>().getRegExpStatics()->reset(cx, input, !!multiline);
}
JS_PUBLIC_API(void)
JS_ClearRegExpStatics(JSContext *cx, JSObject *objArg)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JS_ASSERT(obj);
obj->as<GlobalObject>().getRegExpStatics()->clear();
}
JS_PUBLIC_API(JSBool)
JS_ExecuteRegExp(JSContext *cx, JSObject *objArg, JSObject *reobjArg, jschar *chars, size_t length,
size_t *indexp, JSBool test, jsval *rval)
{
RootedObject obj(cx, objArg);
RootedObject reobj(cx, reobjArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RegExpStatics *res = obj->as<GlobalObject>().getRegExpStatics();
RootedValue val(cx);
if (!ExecuteRegExpLegacy(cx, res, reobj->as<RegExpObject>(), NullPtr(), chars, length, indexp,
test, &val))
{
return false;
}
*rval = val;
return true;
}
JS_PUBLIC_API(JSObject *)
JS_NewRegExpObjectNoStatics(JSContext *cx, char *bytes, size_t length, unsigned flags)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
jschar *chars = InflateString(cx, bytes, &length);
if (!chars)
return NULL;
RegExpObject *reobj = RegExpObject::createNoStatics(cx, chars, length,
RegExpFlag(flags), NULL);
js_free(chars);
return reobj;
}
JS_PUBLIC_API(JSObject *)
JS_NewUCRegExpObjectNoStatics(JSContext *cx, jschar *chars, size_t length, unsigned flags)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return RegExpObject::createNoStatics(cx, chars, length,
RegExpFlag(flags), NULL);
}
JS_PUBLIC_API(JSBool)
JS_ExecuteRegExpNoStatics(JSContext *cx, JSObject *objArg, jschar *chars, size_t length,
size_t *indexp, JSBool test, jsval *rval)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedValue val(cx);
if (!ExecuteRegExpLegacy(cx, NULL, obj->as<RegExpObject>(), NullPtr(), chars, length, indexp,
test, &val))
{
return false;
}
*rval = val;
return true;
}
JS_PUBLIC_API(JSBool)
JS_ObjectIsRegExp(JSContext *cx, JSObject *objArg)
{
RootedObject obj(cx, objArg);
assertSameCompartment(cx, obj);
return ObjectClassIs(obj, ESClass_RegExp, cx);
}
JS_PUBLIC_API(unsigned)
JS_GetRegExpFlags(JSContext *cx, JSObject *objArg)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return obj->as<RegExpObject>().getFlags();
}
JS_PUBLIC_API(JSString *)
JS_GetRegExpSource(JSContext *cx, JSObject *objArg)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return obj->as<RegExpObject>().getSource();
}
/************************************************************************/
JS_PUBLIC_API(JSBool)
JS_SetDefaultLocale(JSRuntime *rt, const char *locale)
{
AssertHeapIsIdle(rt);
return rt->setDefaultLocale(locale);
}
JS_PUBLIC_API(void)
JS_ResetDefaultLocale(JSRuntime *rt)
{
AssertHeapIsIdle(rt);
rt->resetDefaultLocale();
}
JS_PUBLIC_API(void)
JS_SetLocaleCallbacks(JSRuntime *rt, JSLocaleCallbacks *callbacks)
{
AssertHeapIsIdle(rt);
rt->localeCallbacks = callbacks;
}
JS_PUBLIC_API(JSLocaleCallbacks *)
JS_GetLocaleCallbacks(JSRuntime *rt)
{
/* This function can be called by a finalizer. */
return rt->localeCallbacks;
}
/************************************************************************/
JS_PUBLIC_API(JSBool)
JS_IsExceptionPending(JSContext *cx)
{
/* This function can be called by a finalizer. */
return (JSBool) cx->isExceptionPending();
}
JS_PUBLIC_API(JSBool)
JS_GetPendingException(JSContext *cx, jsval *vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!cx->isExceptionPending())
return JS_FALSE;
*vp = cx->getPendingException();
assertSameCompartment(cx, *vp);
return JS_TRUE;
}
JS_PUBLIC_API(void)
JS_SetPendingException(JSContext *cx, jsval valueArg)
{
RootedValue value(cx, valueArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
cx->setPendingException(value);
}
JS_PUBLIC_API(void)
JS_ClearPendingException(JSContext *cx)
{
AssertHeapIsIdle(cx);
cx->clearPendingException();
}
JS_PUBLIC_API(JSBool)
JS_ReportPendingException(JSContext *cx)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_ReportUncaughtException(cx);
}
struct JSExceptionState {
bool throwing;
jsval exception;
};
JS_PUBLIC_API(JSExceptionState *)
JS_SaveExceptionState(JSContext *cx)
{
JSExceptionState *state;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
state = cx->pod_malloc<JSExceptionState>();
if (state) {
state->throwing = JS_GetPendingException(cx, &state->exception);
if (state->throwing && JSVAL_IS_GCTHING(state->exception))
AddValueRoot(cx, &state->exception, "JSExceptionState.exception");
}
return state;
}
JS_PUBLIC_API(void)
JS_RestoreExceptionState(JSContext *cx, JSExceptionState *state)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (state) {
if (state->throwing)
JS_SetPendingException(cx, state->exception);
else
JS_ClearPendingException(cx);
JS_DropExceptionState(cx, state);
}
}
JS_PUBLIC_API(void)
JS_DropExceptionState(JSContext *cx, JSExceptionState *state)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (state) {
if (state->throwing && JSVAL_IS_GCTHING(state->exception)) {
assertSameCompartment(cx, state->exception);
JS_RemoveValueRoot(cx, &state->exception);
}
js_free(state);
}
}
JS_PUBLIC_API(JSErrorReport *)
JS_ErrorFromException(JSContext *cx, jsval valueArg)
{
RootedValue value(cx, valueArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
return js_ErrorFromException(value);
}
JS_PUBLIC_API(JSBool)
JS_ThrowReportedError(JSContext *cx, const char *message,
JSErrorReport *reportp)
{
AssertHeapIsIdle(cx);
return JS_IsRunning(cx) &&
js_ErrorToException(cx, message, reportp, NULL, NULL);
}
JS_PUBLIC_API(JSBool)
JS_ThrowStopIteration(JSContext *cx)
{
AssertHeapIsIdle(cx);
return js_ThrowStopIteration(cx);
}
JS_PUBLIC_API(intptr_t)
JS_GetCurrentThread()
{
#ifdef JS_THREADSAFE
return reinterpret_cast<intptr_t>(PR_GetCurrentThread());
#else
return 0;
#endif
}
extern JS_PUBLIC_API(void)
JS_ClearRuntimeThread(JSRuntime *rt)
{
AssertHeapIsIdle(rt);
#ifdef JS_THREADSAFE
rt->clearOwnerThread();
#endif
}
extern JS_PUBLIC_API(void)
JS_SetRuntimeThread(JSRuntime *rt)
{
AssertHeapIsIdle(rt);
#ifdef JS_THREADSAFE
rt->setOwnerThread();
#endif
}
extern JS_NEVER_INLINE JS_PUBLIC_API(void)
JS_AbortIfWrongThread(JSRuntime *rt)
{
rt->abortIfWrongThread();
}
#ifdef JS_GC_ZEAL
JS_PUBLIC_API(void)
JS_SetGCZeal(JSContext *cx, uint8_t zeal, uint32_t frequency)
{
SetGCZeal(cx->runtime(), zeal, frequency);
}
JS_PUBLIC_API(void)
JS_ScheduleGC(JSContext *cx, uint32_t count)
{
cx->runtime()->gcNextScheduled = count;
}
#endif
JS_PUBLIC_API(void)
JS_SetParallelCompilationEnabled(JSContext *cx, bool enabled)
{
#ifdef JS_ION
jit::js_IonOptions.parallelCompilation = enabled;
#endif
}
JS_PUBLIC_API(void)
JS_SetGlobalCompilerOption(JSContext *cx, JSCompilerOption opt, uint32_t value)
{
#ifdef JS_ION
jit::IonOptions defaultValues;
switch (opt) {
case JSCOMPILER_BASELINE_USECOUNT_TRIGGER:
if (value == uint32_t(-1))
value = defaultValues.baselineUsesBeforeCompile;
jit::js_IonOptions.baselineUsesBeforeCompile = value;
break;
case JSCOMPILER_ION_USECOUNT_TRIGGER:
if (value == uint32_t(-1))
value = defaultValues.usesBeforeCompile;
jit::js_IonOptions.usesBeforeCompile = value;
jit::js_IonOptions.eagerCompilation = (value == 0);
break;
case JSCOMPILER_PJS_ENABLE:
if (value == uint32_t(-1))
value = uint32_t(defaultValues.parallelCompilation);
jit::js_IonOptions.parallelCompilation = bool(value);
break;
}
#endif
}
/************************************************************************/
#if !defined(STATIC_EXPORTABLE_JS_API) && !defined(STATIC_JS_API) && defined(XP_WIN)
#include "jswin.h"
/*
* Initialization routine for the JS DLL.
*/
BOOL WINAPI DllMain (HINSTANCE hDLL, DWORD dwReason, LPVOID lpReserved)
{
return TRUE;
}
#endif
JS_PUBLIC_API(JSBool)
JS_IndexToId(JSContext *cx, uint32_t index, jsid *idp)
{
RootedId id(cx);
if (!IndexToId(cx, index, &id))
return false;
*idp = id;
return true;
}
JS_PUBLIC_API(JSBool)
JS_CharsToId(JSContext* cx, JS::TwoByteChars chars, jsid *idp)
{
RootedAtom atom(cx, AtomizeChars<CanGC>(cx, chars.start().get(), chars.length()));
if (!atom)
return false;
#ifdef DEBUG
uint32_t dummy;
MOZ_ASSERT(!atom->isIndex(&dummy), "API misuse: |chars| must not encode an index");
#endif
*idp = AtomToId(atom);
return true;
}
JS_PUBLIC_API(JSBool)
JS_IsIdentifier(JSContext *cx, JSString *str, JSBool *isIdentifier)
{
assertSameCompartment(cx, str);
JSLinearString* linearStr = str->ensureLinear(cx);
if (!linearStr)
return false;
*isIdentifier = js::frontend::IsIdentifier(linearStr);
return true;
}
JS_PUBLIC_API(JSBool)
JS_DescribeScriptedCaller(JSContext *cx, JSScript **script, unsigned *lineno)
{
if (script)
*script = NULL;
if (lineno)
*lineno = 0;
NonBuiltinScriptFrameIter i(cx);
if (i.done())
return JS_FALSE;
if (script)
*script = i.script();
if (lineno)
*lineno = js::PCToLineNumber(i.script(), i.pc());
return JS_TRUE;
}
#ifdef JS_THREADSAFE
static PRStatus
CallOnce(void *func)
{
JSInitCallback init = JS_DATA_TO_FUNC_PTR(JSInitCallback, func);
return init() ? PR_SUCCESS : PR_FAILURE;
}
#endif
JS_PUBLIC_API(JSBool)
JS_CallOnce(JSCallOnceType *once, JSInitCallback func)
{
#ifdef JS_THREADSAFE
return PR_CallOnceWithArg(once, CallOnce, JS_FUNC_TO_DATA_PTR(void *, func)) == PR_SUCCESS;
#else
if (!*once) {
*once = true;
return func();
} else {
return JS_TRUE;
}
#endif
}
AutoGCRooter::AutoGCRooter(JSContext *cx, ptrdiff_t tag)
: down(cx->runtime()->autoGCRooters), tag_(tag), stackTop(&cx->runtime()->autoGCRooters)
{
JS_ASSERT(this != *stackTop);
*stackTop = this;
}
#ifdef DEBUG
JS_PUBLIC_API(void)
JS::AssertArgumentsAreSane(JSContext *cx, const JS::Value &value)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
}
#endif /* DEBUG */
JS_PUBLIC_API(void *)
JS_EncodeScript(JSContext *cx, JSScript *scriptArg, uint32_t *lengthp)
{
TRACK_MEMORY_SCOPE("Javascript");
XDREncoder encoder(cx);
RootedScript script(cx, scriptArg);
if (!encoder.codeScript(&script))
return NULL;
return encoder.forgetData(lengthp);
}
JS_PUBLIC_API(void *)
JS_EncodeInterpretedFunction(JSContext *cx, JSObject *funobjArg, uint32_t *lengthp)
{
TRACK_MEMORY_SCOPE("Javascript");
XDREncoder encoder(cx);
RootedObject funobj(cx, funobjArg);
if (!encoder.codeFunction(&funobj))
return NULL;
return encoder.forgetData(lengthp);
}
JS_PUBLIC_API(JSScript *)
JS_DecodeScript(JSContext *cx, const void *data, uint32_t length,
JSPrincipals *principals, JSPrincipals *originPrincipals)
{
TRACK_MEMORY_SCOPE("Javascript");
XDRDecoder decoder(cx, data, length, principals, originPrincipals);
RootedScript script(cx);
if (!decoder.codeScript(&script))
return NULL;
return script;
}
JS_PUBLIC_API(JSObject *)
JS_DecodeInterpretedFunction(JSContext *cx, const void *data, uint32_t length,
JSPrincipals *principals, JSPrincipals *originPrincipals)
{
TRACK_MEMORY_SCOPE("Javascript");
XDRDecoder decoder(cx, data, length, principals, originPrincipals);
RootedObject funobj(cx);
if (!decoder.codeFunction(&funobj))
return NULL;
return funobj;
}
JS_PUBLIC_API(JSObject *)
JS_GetScriptedGlobal(JSContext *cx)
{
ScriptFrameIter i(cx);
if (i.done())
return cx->global();
return &i.scopeChain()->global();
}
JS_PUBLIC_API(JSBool)
JS_PreventExtensions(JSContext *cx, JS::HandleObject obj)
{
if (!JS_IsExtensible(obj))
return JS_TRUE;
return JSObject::preventExtensions(cx, obj);
}