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818ce2c0e43c601f21dddd45cc9cd720de99249c
tubestation/js/src/jsapi.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sw=4 et tw=78:
*
* 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 "mozilla/FloatingPoint.h"
#include <ctype.h>
#include <stdarg.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include "jstypes.h"
#include "jsutil.h"
#include "jsclist.h"
#include "jsprf.h"
#include "jsapi.h"
#include "jsarray.h"
#include "jsatom.h"
#include "jsbool.h"
#include "jsclone.h"
#include "jscntxt.h"
#include "jsversion.h"
#include "jsdate.h"
#include "jsdtoa.h"
#include "jsexn.h"
#include "jsfun.h"
#include "jsgc.h"
#include "jsinterp.h"
#include "jsiter.h"
#include "jslock.h"
#include "jsmath.h"
#include "jsnativestack.h"
#include "jsnum.h"
#include "json.h"
#include "jsobj.h"
#include "jsopcode.h"
#include "jsprobes.h"
#include "jsproxy.h"
#include "jsscope.h"
#include "jsscript.h"
#include "jsstr.h"
#include "prmjtime.h"
#include "jsweakmap.h"
#include "jswrapper.h"
#include "jstypedarray.h"
#include "jsxml.h"
#include "builtin/Eval.h"
#include "builtin/MapObject.h"
#include "builtin/RegExp.h"
#include "ds/LifoAlloc.h"
#include "frontend/BytecodeCompiler.h"
#include "frontend/TreeContext.h"
#include "gc/Marking.h"
#include "gc/Memory.h"
#include "js/MemoryMetrics.h"
#include "vm/NumericConversions.h"
#include "vm/StringBuffer.h"
#include "vm/Xdr.h"
#include "yarr/BumpPointerAllocator.h"
#include "jsatominlines.h"
#include "jsinferinlines.h"
#include "jsobjinlines.h"
#include "jsscopeinlines.h"
#include "jsscriptinlines.h"
#include "vm/ObjectImpl-inl.h"
#include "vm/RegExpObject-inl.h"
#include "vm/RegExpStatics-inl.h"
#include "vm/Stack-inl.h"
#include "vm/String-inl.h"
#if ENABLE_YARR_JIT
#include "assembler/jit/ExecutableAllocator.h"
#include "methodjit/Logging.h"
#endif
using namespace js;
using namespace js::gc;
using namespace js::types;
using js::frontend::Parser;
bool
JS::detail::CallMethodIfWrapped(JSContext *cx, IsAcceptableThis test, NativeImpl impl,
CallArgs args)
{
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;
}
/*
* This class is a version-establishing barrier at the head of a VM entry or
* re-entry. It ensures that:
*
* - |newVersion| is the starting (default) version used for the context.
* - The starting version state is not an override.
* - Overrides in the VM session are not propagated to the caller.
*/
class AutoVersionAPI
{
JSContext * const cx;
JSVersion oldDefaultVersion;
bool oldHasVersionOverride;
JSVersion oldVersionOverride;
#ifdef DEBUG
unsigned oldCompileOptions;
#endif
JSVersion newVersion;
public:
AutoVersionAPI(JSContext *cx, JSVersion newVersion)
: cx(cx),
oldDefaultVersion(cx->getDefaultVersion()),
oldHasVersionOverride(cx->isVersionOverridden()),
oldVersionOverride(oldHasVersionOverride ? cx->findVersion() : JSVERSION_UNKNOWN)
#ifdef DEBUG
, oldCompileOptions(cx->getCompileOptions())
#endif
{
#if JS_HAS_XML_SUPPORT
// For backward compatibility, AutoVersionAPI clobbers the
// JSOPTION_MOAR_XML bit in cx, but not the JSOPTION_ALLOW_XML bit.
newVersion = JSVersion(newVersion | (oldDefaultVersion & VersionFlags::ALLOW_XML));
#endif
this->newVersion = newVersion;
cx->clearVersionOverride();
cx->setDefaultVersion(newVersion);
}
~AutoVersionAPI() {
cx->setDefaultVersion(oldDefaultVersion);
if (oldHasVersionOverride)
cx->overrideVersion(oldVersionOverride);
else
cx->clearVersionOverride();
JS_ASSERT(oldCompileOptions == cx->getCompileOptions());
}
/* The version that this scoped-entity establishes. */
JSVersion version() const { return newVersion; }
};
#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
jsid JS_DEFAULT_XML_NAMESPACE_ID = { size_t(JSID_TYPE_DEFAULT_XML_NAMESPACE) };
jsid JSID_VOID = { size_t(JSID_TYPE_VOID) };
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));
/* 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 JSBool
TryArgumentFormatter(JSContext *cx, const char **formatp, JSBool fromJS, jsval **vpp, va_list *app)
{
const char *format;
JSArgumentFormatMap *map;
format = *formatp;
for (map = cx->argumentFormatMap; map; map = map->next) {
if (!strncmp(format, map->format, map->length)) {
*formatp = format + map->length;
return map->formatter(cx, format, fromJS, vpp, app);
}
}
JS_ReportErrorNumber(cx, js_GetErrorMessage, NULL, JSMSG_BAD_CHAR, format);
return JS_FALSE;
}
static void
AssertHeapIsIdle(JSRuntime *rt)
{
JS_ASSERT(rt->heapState == JSRuntime::Idle);
}
static void
AssertHeapIsIdle(JSContext *cx)
{
AssertHeapIsIdle(cx->runtime);
}
static void
AssertHeapIsIdleOrIterating(JSRuntime *rt)
{
JS_ASSERT(rt->heapState != JSRuntime::Collecting);
}
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, ...)
{
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)
{
jsval *sp;
JSBool required;
char c;
double d;
JSString *str;
JSObject *obj;
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 *) = js_ValueToBoolean(*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':
str = ToString(cx, *sp);
if (!str)
return JS_FALSE;
*sp = STRING_TO_JSVAL(str);
if (c == 'W') {
JSFixedString *fixed = str->ensureFixed(cx);
if (!fixed)
return JS_FALSE;
*va_arg(ap, const jschar **) = fixed->chars();
} 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->toFunction();
break;
case 'v':
*va_arg(ap, jsval *) = *sp;
break;
case '*':
break;
default:
format--;
if (!TryArgumentFormatter(cx, &format, JS_TRUE, &sp,
JS_ADDRESSOF_VA_LIST(ap))) {
return JS_FALSE;
}
/* NB: the formatter already updated sp, so we continue here. */
continue;
}
sp++;
}
return JS_TRUE;
}
JS_PUBLIC_API(JSBool)
JS_AddArgumentFormatter(JSContext *cx, const char *format, JSArgumentFormatter formatter)
{
size_t length;
JSArgumentFormatMap **mpp, *map;
length = strlen(format);
mpp = &cx->argumentFormatMap;
while ((map = *mpp) != NULL) {
/* Insert before any shorter string to match before prefixes. */
if (map->length < length)
break;
if (map->length == length && !strcmp(map->format, format))
goto out;
mpp = &map->next;
}
map = (JSArgumentFormatMap *) cx->malloc_(sizeof *map);
if (!map)
return JS_FALSE;
map->format = format;
map->length = length;
map->next = *mpp;
*mpp = map;
out:
map->formatter = formatter;
return JS_TRUE;
}
JS_PUBLIC_API(void)
JS_RemoveArgumentFormatter(JSContext *cx, const char *format)
{
size_t length;
JSArgumentFormatMap **mpp, *map;
length = strlen(format);
mpp = &cx->argumentFormatMap;
while ((map = *mpp) != NULL) {
if (map->length == length && !strcmp(map->format, format)) {
*mpp = map->next;
cx->free_(map);
return;
}
mpp = &map->next;
}
}
JS_PUBLIC_API(JSBool)
JS_ConvertValue(JSContext *cx, jsval v, JSType type, jsval *vp)
{
JSBool ok;
JSObject *obj;
JSString *str;
double d;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v);
switch (type) {
case JSTYPE_VOID:
*vp = JSVAL_VOID;
ok = JS_TRUE;
break;
case JSTYPE_OBJECT:
ok = js_ValueToObjectOrNull(cx, v, &obj);
if (ok)
*vp = OBJECT_TO_JSVAL(obj);
break;
case JSTYPE_FUNCTION:
*vp = v;
obj = ReportIfNotFunction(cx, *vp);
ok = (obj != NULL);
break;
case JSTYPE_STRING:
str = ToString(cx, v);
ok = (str != NULL);
if (ok)
*vp = STRING_TO_JSVAL(str);
break;
case JSTYPE_NUMBER:
ok = JS_ValueToNumber(cx, v, &d);
if (ok)
*vp = DOUBLE_TO_JSVAL(d);
break;
case JSTYPE_BOOLEAN:
*vp = BOOLEAN_TO_JSVAL(js_ValueToBoolean(v));
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 v, JSObject **objp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v);
return js_ValueToObjectOrNull(cx, v, objp);
}
JS_PUBLIC_API(JSFunction *)
JS_ValueToFunction(JSContext *cx, jsval v)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v);
return ReportIfNotFunction(cx, v);
}
JS_PUBLIC_API(JSFunction *)
JS_ValueToConstructor(JSContext *cx, jsval v)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v);
return ReportIfNotFunction(cx, v);
}
JS_PUBLIC_API(JSString *)
JS_ValueToString(JSContext *cx, jsval v)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v);
return ToString(cx, v);
}
JS_PUBLIC_API(JSString *)
JS_ValueToSource(JSContext *cx, jsval v)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v);
return js_ValueToSource(cx, v);
}
JS_PUBLIC_API(JSBool)
JS_ValueToNumber(JSContext *cx, jsval v, double *dp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v);
return ToNumber(cx, v, dp);
}
JS_PUBLIC_API(JSBool)
JS_DoubleIsInt32(double d, int32_t *ip)
{
return MOZ_DOUBLE_IS_INT32(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 v, int32_t *ip)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v);
RootedValue value(cx, v);
return ToInt32(cx, value, ip);
}
JS_PUBLIC_API(JSBool)
JS_ValueToECMAUint32(JSContext *cx, jsval v, uint32_t *ip)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v);
return ToUint32(cx, v, (uint32_t *)ip);
}
JS_PUBLIC_API(JSBool)
JS_ValueToInt32(JSContext *cx, jsval v, int32_t *ip)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
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 (MOZ_DOUBLE_IS_NaN(d) || d <= -2147483649.0 || 2147483648.0 <= d) {
js_ReportValueError(cx, JSMSG_CANT_CONVERT,
JSDVG_SEARCH_STACK, v, NULL);
return false;
}
*ip = (int32_t) floor(d + 0.5); /* Round to nearest */
return true;
}
JS_PUBLIC_API(JSBool)
JS_ValueToUint16(JSContext *cx, jsval v, uint16_t *ip)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v);
return ValueToUint16(cx, v, (uint16_t *)ip);
}
JS_PUBLIC_API(JSBool)
JS_ValueToBoolean(JSContext *cx, jsval v, JSBool *bp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v);
*bp = js_ValueToBoolean(v);
return JS_TRUE;
}
JS_PUBLIC_API(JSType)
JS_TypeOfValue(JSContext *cx, jsval v)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v);
return TypeOfValue(cx, v);
}
JS_PUBLIC_API(const char *)
JS_GetTypeName(JSContext *cx, JSType type)
{
if ((unsigned)type >= (unsigned)JSTYPE_LIMIT)
return NULL;
return JS_TYPE_STR(type);
}
JS_PUBLIC_API(JSBool)
JS_StrictlyEqual(JSContext *cx, jsval v1, jsval v2, JSBool *equal)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v1, v2);
bool eq;
if (!StrictlyEqual(cx, v1, v2, &eq))
return false;
*equal = eq;
return true;
}
JS_PUBLIC_API(JSBool)
JS_LooselyEqual(JSContext *cx, jsval v1, jsval v2, JSBool *equal)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v1, v2);
bool eq;
if (!LooselyEqual(cx, v1, v2, &eq))
return false;
*equal = eq;
return true;
}
JS_PUBLIC_API(JSBool)
JS_SameValue(JSContext *cx, jsval v1, jsval v2, JSBool *same)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v1, v2);
bool s;
if (!SameValue(cx, v1, v2, &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 detect unsafe
* changes to js_CStringsAreUTF8 after a runtime has been created, and to
* control things that should happen only once across all runtimes.
*/
static JSBool js_NewRuntimeWasCalled = JS_FALSE;
static const JSSecurityCallbacks NullSecurityCallbacks = { };
JSRuntime::JSRuntime()
: atomsCompartment(NULL),
#ifdef JS_THREADSAFE
ownerThread_(NULL),
#endif
tempLifoAlloc(TEMP_LIFO_ALLOC_PRIMARY_CHUNK_SIZE),
execAlloc_(NULL),
bumpAlloc_(NULL),
#ifdef JS_METHODJIT
jaegerRuntime_(NULL),
#endif
nativeStackBase(0),
nativeStackQuota(0),
interpreterFrames(NULL),
cxCallback(NULL),
destroyCompartmentCallback(NULL),
activityCallback(NULL),
activityCallbackArg(NULL),
#ifdef JS_THREADSAFE
suspendCount(0),
requestDepth(0),
# ifdef DEBUG
checkRequestDepth(0),
# endif
#endif
gcSystemAvailableChunkListHead(NULL),
gcUserAvailableChunkListHead(NULL),
gcKeepAtoms(0),
gcBytes(0),
gcMaxBytes(0),
gcMaxMallocBytes(0),
gcNumArenasFreeCommitted(0),
gcVerifyData(NULL),
gcChunkAllocationSinceLastGC(false),
gcNextFullGCTime(0),
gcLastGCTime(0),
gcJitReleaseTime(0),
gcMode(JSGC_MODE_GLOBAL),
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),
gcShouldCleanUpEverything(false),
gcIsNeeded(0),
gcWeakMapList(NULL),
gcStats(thisFromCtor()),
gcNumber(0),
gcStartNumber(0),
gcIsFull(false),
gcTriggerReason(gcreason::NO_REASON),
gcStrictCompartmentChecking(false),
gcDisableStrictProxyCheckingCount(0),
gcIncrementalState(gc::NO_INCREMENTAL),
gcLastMarkSlice(false),
gcInterFrameGC(0),
gcSliceBudget(SliceBudget::Unlimited),
gcIncrementalEnabled(true),
gcExactScanningEnabled(true),
gcPoke(false),
heapState(Idle),
#ifdef JS_GC_ZEAL
gcZeal_(0),
gcZealFrequency(0),
gcNextScheduled(0),
gcDeterministicOnly(false),
gcIncrementalLimit(0),
#endif
gcCallback(NULL),
gcSliceCallback(NULL),
gcFinalizeCallback(NULL),
gcMallocBytes(0),
gcBlackRootsTraceOp(NULL),
gcBlackRootsData(NULL),
gcGrayRootsTraceOp(NULL),
gcGrayRootsData(NULL),
autoGCRooters(NULL),
scriptAndCountsVector(NULL),
NaNValue(UndefinedValue()),
negativeInfinityValue(UndefinedValue()),
positiveInfinityValue(UndefinedValue()),
emptyString(NULL),
debugMode(false),
spsProfiler(thisFromCtor()),
profilingScripts(false),
alwaysPreserveCode(false),
hadOutOfMemory(false),
debugScopes(NULL),
data(NULL),
gcLock(NULL),
gcHelperThread(thisFromCtor()),
defaultFreeOp_(thisFromCtor(), false, false),
debuggerMutations(0),
securityCallbacks(const_cast<JSSecurityCallbacks *>(&NullSecurityCallbacks)),
destroyPrincipals(NULL),
structuredCloneCallbacks(NULL),
telemetryCallback(NULL),
propertyRemovals(0),
thousandsSeparator(0),
decimalSeparator(0),
numGrouping(0),
waiveGCQuota(false),
mathCache_(NULL),
dtoaState(NULL),
pendingProxyOperation(NULL),
trustedPrincipals_(NULL),
wrapObjectCallback(TransparentObjectWrapper),
sameCompartmentWrapObjectCallback(NULL),
preWrapObjectCallback(NULL),
preserveWrapperCallback(NULL),
#ifdef DEBUG
noGCOrAllocationCheck(0),
#endif
inOOMReport(0),
jitHardening(false)
{
/* Initialize infallibly first, so we can goto bad and JS_DestroyRuntime. */
JS_INIT_CLIST(&contextList);
JS_INIT_CLIST(&debuggerList);
PodZero(&debugHooks);
PodZero(&atomState);
#if JS_STACK_GROWTH_DIRECTION > 0
nativeStackLimit = UINTPTR_MAX;
#endif
}
bool
JSRuntime::init(uint32_t maxbytes)
{
#ifdef JS_THREADSAFE
ownerThread_ = PR_GetCurrentThread();
#endif
#ifdef JS_METHODJIT_SPEW
JMCheckLogging();
#endif
if (!js_InitGC(this, maxbytes))
return false;
if (!gcMarker.init())
return false;
const char *size = getenv("JSGC_MARK_STACK_LIMIT");
if (size)
SetMarkStackLimit(this, atoi(size));
if (!(atomsCompartment = this->new_<JSCompartment>(this)) ||
!atomsCompartment->init(NULL) ||
!compartments.append(atomsCompartment)) {
Foreground::delete_(atomsCompartment);
return false;
}
atomsCompartment->isSystemCompartment = true;
atomsCompartment->setGCLastBytes(8192, 8192, GC_NORMAL);
if (!js_InitAtomState(this))
return false;
if (!InitRuntimeNumberState(this))
return false;
dtoaState = js_NewDtoaState();
if (!dtoaState)
return false;
if (!stackSpace.init())
return false;
if (!scriptFilenameTable.init())
return false;
if (!evalCache.init())
return false;
debugScopes = this->new_<DebugScopes>(this);
if (!debugScopes || !debugScopes->init()) {
Foreground::delete_(debugScopes);
return false;
}
nativeStackBase = GetNativeStackBase();
return true;
}
JSRuntime::~JSRuntime()
{
JS_ASSERT(onOwnerThread());
delete_(debugScopes);
/*
* Even though all objects in the compartment are dead, we may have keep
* some filenames around because of gcKeepAtoms.
*/
FreeScriptFilenames(this);
#ifdef DEBUG
/* Don't hurt everyone in leaky ol' Mozilla with a fatal JS_ASSERT! */
if (!JS_CLIST_IS_EMPTY(&contextList)) {
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
FinishRuntimeNumberState(this);
js_FinishAtomState(this);
if (dtoaState)
js_DestroyDtoaState(dtoaState);
js_FinishGC(this);
#ifdef JS_THREADSAFE
if (gcLock)
PR_DestroyLock(gcLock);
#endif
delete_(bumpAlloc_);
delete_(mathCache_);
#ifdef JS_METHODJIT
delete_(jaegerRuntime_);
#endif
delete_(execAlloc_); /* Delete after jaegerRuntime_. */
}
#ifdef JS_THREADSAFE
void
JSRuntime::setOwnerThread()
{
JS_ASSERT(ownerThread_ == (void *)0xc1ea12); /* "clear" */
JS_ASSERT(requestDepth == 0);
ownerThread_ = PR_GetCurrentThread();
nativeStackBase = GetNativeStackBase();
if (nativeStackQuota)
JS_SetNativeStackQuota(this, nativeStackQuota);
}
void
JSRuntime::clearOwnerThread()
{
JS_ASSERT(onOwnerThread());
JS_ASSERT(requestDepth == 0);
ownerThread_ = (void *)0xc1ea12; /* "clear" */
nativeStackBase = 0;
#if JS_STACK_GROWTH_DIRECTION > 0
nativeStackLimit = UINTPTR_MAX;
#else
nativeStackLimit = 0;
#endif
}
JS_FRIEND_API(bool)
JSRuntime::onOwnerThread() const
{
return ownerThread_ == PR_GetCurrentThread();
}
#endif /* JS_THREADSAFE */
JS_PUBLIC_API(JSRuntime *)
JS_NewRuntime(uint32_t maxbytes)
{
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 */
InitMemorySubsystem();
js_NewRuntimeWasCalled = JS_TRUE;
}
JSRuntime *rt = OffTheBooks::new_<JSRuntime>();
if (!rt)
return NULL;
if (!rt->init(maxbytes)) {
JS_DestroyRuntime(rt);
return NULL;
}
Probes::createRuntime(rt);
return rt;
}
JS_PUBLIC_API(void)
JS_DestroyRuntime(JSRuntime *rt)
{
Probes::destroyRuntime(rt);
Foreground::delete_(rt);
}
JS_PUBLIC_API(void)
JS_ShutDown(void)
{
Probes::shutdown();
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)
{
JSRuntime *rt = cx->runtime;
JS_ASSERT(rt->onOwnerThread());
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;
JS_ASSERT(rt->onOwnerThread());
JS_ASSERT(rt->requestDepth != 0);
if (rt->requestDepth != 1) {
rt->requestDepth--;
} else {
rt->conservativeGC.updateForRequestEnd(rt->suspendCount);
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
}
/* Yield to pending GC operations, regardless of request depth */
JS_PUBLIC_API(void)
JS_YieldRequest(JSContext *cx)
{
#ifdef JS_THREADSAFE
CHECK_REQUEST(cx);
JS_ResumeRequest(cx, JS_SuspendRequest(cx));
#endif
}
JS_PUBLIC_API(unsigned)
JS_SuspendRequest(JSContext *cx)
{
#ifdef JS_THREADSAFE
JSRuntime *rt = cx->runtime;
JS_ASSERT(rt->onOwnerThread());
unsigned saveDepth = rt->requestDepth;
if (!saveDepth)
return 0;
rt->suspendCount++;
rt->requestDepth = 1;
StopRequest(cx);
return saveDepth;
#else
return 0;
#endif
}
JS_PUBLIC_API(void)
JS_ResumeRequest(JSContext *cx, unsigned saveDepth)
{
#ifdef JS_THREADSAFE
JSRuntime *rt = cx->runtime;
JS_ASSERT(rt->onOwnerThread());
if (saveDepth == 0)
return;
JS_ASSERT(saveDepth >= 1);
JS_ASSERT(!rt->requestDepth);
JS_ASSERT(rt->suspendCount);
StartRequest(cx);
rt->requestDepth = saveDepth;
rt->suspendCount--;
#endif
}
JS_PUBLIC_API(JSBool)
JS_IsInRequest(JSRuntime *rt)
{
#ifdef JS_THREADSAFE
JS_ASSERT(rt->onOwnerThread());
return rt->requestDepth != 0;
#else
return false;
#endif
}
JS_PUBLIC_API(JSBool)
JS_IsInSuspendedRequest(JSRuntime *rt)
{
#ifdef JS_THREADSAFE
JS_ASSERT(rt->onOwnerThread());
return rt->suspendCount != 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)
{
DestroyContext(cx, DCM_FORCE_GC);
}
JS_PUBLIC_API(void)
JS_DestroyContextNoGC(JSContext *cx)
{
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;
JSCList *next = cx ? cx->link.next : rt->contextList.next;
cx = (next == &rt->contextList) ? NULL : JSContext::fromLinkField(next);
*iterp = cx;
return cx;
}
JS_PUBLIC_API(JSVersion)
JS_GetVersion(JSContext *cx)
{
return VersionNumber(cx->findVersion());
}
JS_PUBLIC_API(JSVersion)
JS_SetVersion(JSContext *cx, JSVersion newVersion)
{
JS_ASSERT(VersionIsKnown(newVersion));
JS_ASSERT(!VersionHasFlags(newVersion));
JSVersion newVersionNumber = newVersion;
#ifdef DEBUG
unsigned coptsBefore = cx->getCompileOptions();
#endif
JSVersion oldVersion = cx->findVersion();
JSVersion oldVersionNumber = VersionNumber(oldVersion);
if (oldVersionNumber == newVersionNumber)
return oldVersionNumber; /* No override actually occurs! */
/* We no longer support 1.4 or below. */
if (newVersionNumber != JSVERSION_DEFAULT && newVersionNumber <= JSVERSION_1_4)
return oldVersionNumber;
VersionCopyFlags(&newVersion, oldVersion);
cx->maybeOverrideVersion(newVersion);
JS_ASSERT(cx->getCompileOptions() == coptsBefore);
return oldVersionNumber;
}
static struct v2smap {
JSVersion version;
const char *string;
} v2smap[] = {
{JSVERSION_1_0, "1.0"},
{JSVERSION_1_1, "1.1"},
{JSVERSION_1_2, "1.2"},
{JSVERSION_1_3, "1.3"},
{JSVERSION_1_4, "1.4"},
{JSVERSION_ECMA_3, "ECMAv3"},
{JSVERSION_1_5, "1.5"},
{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_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->allOptions();
}
static unsigned
SetOptionsCommon(JSContext *cx, unsigned options)
{
JS_ASSERT((options & JSALLOPTION_MASK) == options);
unsigned oldopts = cx->allOptions();
unsigned newropts = options & JSRUNOPTION_MASK;
unsigned newcopts = options & JSCOMPILEOPTION_MASK;
cx->setRunOptions(newropts);
cx->setCompileOptions(newcopts);
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->allOptions();
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 1.8.5+ 2011-04-16";
}
JS_PUBLIC_API(void)
JS_SetDestroyCompartmentCallback(JSRuntime *rt, JSDestroyCompartmentCallback callback)
{
rt->destroyCompartmentCallback = 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(JSCrossCompartmentCall *)
JS_EnterCrossCompartmentCall(JSContext *cx, JSObject *target)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JS_ASSERT(target);
AutoCompartment *call = cx->new_<AutoCompartment>(cx, target);
if (!call)
return NULL;
if (!call->enter()) {
Foreground::delete_(call);
return NULL;
}
return reinterpret_cast<JSCrossCompartmentCall *>(call);
}
namespace js {
// Declared in jscompartment.h
Class dummy_class = {
"jdummy",
JSCLASS_GLOBAL_FLAGS,
JS_PropertyStub, JS_PropertyStub,
JS_PropertyStub, JS_StrictPropertyStub,
JS_EnumerateStub, JS_ResolveStub,
JS_ConvertStub
};
} /*namespace js */
JS_PUBLIC_API(JSCrossCompartmentCall *)
JS_EnterCrossCompartmentCallScript(JSContext *cx, JSScript *target)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
GlobalObject *global = target->compartment()->maybeGlobal();
return global ? JS_EnterCrossCompartmentCall(cx, global) : NULL;
}
JS_PUBLIC_API(JSCrossCompartmentCall *)
JS_EnterCrossCompartmentCallStackFrame(JSContext *cx, JSStackFrame *target)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return JS_EnterCrossCompartmentCall(cx, &Valueify(target)->global());
}
JS_PUBLIC_API(void)
JS_LeaveCrossCompartmentCall(JSCrossCompartmentCall *call)
{
AutoCompartment *realcall = reinterpret_cast<AutoCompartment *>(call);
AssertHeapIsIdle(realcall->context);
CHECK_REQUEST(realcall->context);
realcall->leave();
Foreground::delete_(realcall);
}
bool
JSAutoEnterCompartment::enter(JSContext *cx, JSObject *target)
{
AssertHeapIsIdleOrIterating(cx);
JS_ASSERT(state == STATE_UNENTERED);
if (cx->compartment == target->compartment()) {
state = STATE_SAME_COMPARTMENT;
return true;
}
JS_STATIC_ASSERT(sizeof(bytes) == sizeof(AutoCompartment));
CHECK_REQUEST(cx);
AutoCompartment *call = new (bytes) AutoCompartment(cx, target);
if (call->enter()) {
state = STATE_OTHER_COMPARTMENT;
return true;
}
return false;
}
void
JSAutoEnterCompartment::enterAndIgnoreErrors(JSContext *cx, JSObject *target)
{
(void) enter(cx, target);
}
void
JSAutoEnterCompartment::leave()
{
JS_ASSERT(entered());
if (state == STATE_OTHER_COMPARTMENT) {
AutoCompartment* ac = getAutoCompartment();
CHECK_REQUEST(ac->context);
ac->~AutoCompartment();
}
state = STATE_UNENTERED;
}
JSAutoEnterCompartment::~JSAutoEnterCompartment()
{
if (entered())
leave();
}
namespace JS {
bool
AutoEnterScriptCompartment::enter(JSContext *cx, JSScript *target)
{
JS_ASSERT(!call);
if (cx->compartment == target->compartment()) {
call = reinterpret_cast<JSCrossCompartmentCall*>(1);
return true;
}
call = JS_EnterCrossCompartmentCallScript(cx, target);
return call != NULL;
}
bool
AutoEnterFrameCompartment::enter(JSContext *cx, JSStackFrame *target)
{
JS_ASSERT(!call);
if (cx->compartment == Valueify(target)->scopeChain()->compartment()) {
call = reinterpret_cast<JSCrossCompartmentCall*>(1);
return true;
}
call = JS_EnterCrossCompartmentCallStackFrame(cx, target);
return call != NULL;
}
} /* namespace JS */
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(JSBool)
JS_WrapObject(JSContext *cx, JSObject **objp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return cx->compartment->wrap(cx, objp);
}
JS_PUBLIC_API(JSBool)
JS_WrapValue(JSContext *cx, jsval *vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return cx->compartment->wrap(cx, vp);
}
/*
* 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.
*/
JS_PUBLIC_API(JSObject *)
JS_TransplantObject(JSContext *cx, JSObject *origobj, JSObject *target)
{
AssertHeapIsIdle(cx);
JS_ASSERT(origobj != target);
JS_ASSERT(!IsCrossCompartmentWrapper(origobj));
JS_ASSERT(!IsCrossCompartmentWrapper(target));
/*
* Transplantation typically allocates new wrappers in every compartment. If
* an incremental GC is active, this causes every compartment to be leaked
* for that GC. Hence, we finish any ongoing incremental GC before the
* transplant to avoid leaks.
*/
if (cx->runtime->gcIncrementalState != NO_INCREMENTAL)
FinishIncrementalGC(cx->runtime, gcreason::TRANSPLANT);
JSCompartment *destination = target->compartment();
WrapperMap &map = destination->crossCompartmentWrappers;
Value origv = ObjectValue(*origobj);
JSObject *newIdentity;
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 (!origobj->swap(cx, target))
return NULL;
newIdentity = origobj;
} else if (WrapperMap::Ptr p = map.lookup(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.
map.remove(p);
NukeCrossCompartmentWrapper(newIdentity);
if (!newIdentity->swap(cx, target))
return NULL;
} 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))
return NULL;
// Lastly, update the original object to point to the new one.
if (origobj->compartment() != destination) {
AutoCompartment ac(cx, origobj);
JSObject *newIdentityWrapper = newIdentity;
if (!ac.enter() || !JS_WrapObject(cx, &newIdentityWrapper))
return NULL;
if (!origobj->swap(cx, newIdentityWrapper))
return NULL;
origobj->compartment()->crossCompartmentWrappers.put(ObjectValue(*newIdentity), origv);
}
// The new identity object might be one of several things. Return it to avoid
// ambiguity.
return newIdentity;
}
/*
* The location object is special. There is the location object itself and
* then the location object wrapper. Because there are no direct references to
* the location object itself, we don't want the old obj (|origobj| here) to
* become the new wrapper but the wrapper itself instead. This leads to very
* subtle differences between js_TransplantObjectWithWrapper and
* JS_TransplantObject.
*/
JS_FRIEND_API(JSObject *)
js_TransplantObjectWithWrapper(JSContext *cx,
JSObject *origobj,
JSObject *origwrapper,
JSObject *targetobj,
JSObject *targetwrapper)
{
AssertHeapIsIdle(cx);
JS_ASSERT(!IsCrossCompartmentWrapper(origobj));
JS_ASSERT(!IsCrossCompartmentWrapper(origwrapper));
JS_ASSERT(!IsCrossCompartmentWrapper(targetobj));
JS_ASSERT(!IsCrossCompartmentWrapper(targetwrapper));
JSObject *newWrapper;
JSCompartment *destination = targetobj->compartment();
WrapperMap &map = destination->crossCompartmentWrappers;
// |origv| is the map entry we're looking up. The map entries are going to
// be for |origobj|, not |origwrapper|.
Value origv = ObjectValue(*origobj);
// There might already be a wrapper for the original object in the new
// compartment.
if (WrapperMap::Ptr p = map.lookup(origv)) {
// There is. Make the existing cross-compartment wrapper a same-
// compartment wrapper.
newWrapper = &p->value.toObject();
// When we remove origv from the wrapper map, its wrapper, newWrapper,
// must immediately cease to be a cross-compartment wrapper. Neuter it.
map.remove(p);
NukeCrossCompartmentWrapper(newWrapper);
if (!newWrapper->swap(cx, targetwrapper))
return NULL;
} else {
// Otherwise, use the passed-in wrapper as the same-compartment wrapper.
newWrapper = targetwrapper;
}
// Now, iterate through other scopes looking for references to the old
// object. Note that the entries in the maps are for |origobj| and not
// |origwrapper|. They need to be updated to point at the new object.
if (!RemapAllWrappersForObject(cx, origobj, targetobj))
return NULL;
// Lastly, update things in the original compartment. Our invariants dictate
// that the original compartment can only have one cross-compartment wrapper
// to the new object. So we choose to update |origwrapper|, not |origobj|,
// since theoretically there should have been no direct intra-compartment
// references to |origobj|.
{
AutoCompartment ac(cx, origobj);
JSObject *wrapperGuts = targetobj;
if (!ac.enter() || !JS_WrapObject(cx, &wrapperGuts))
return NULL;
if (!origwrapper->swap(cx, wrapperGuts))
return NULL;
origwrapper->compartment()->crossCompartmentWrappers.put(ObjectValue(*targetobj),
ObjectValue(*origwrapper));
}
return newWrapper;
}
/*
* 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 *obj)
{
return RemapAllWrappersForObject(cx, obj, obj);
}
JS_PUBLIC_API(JSObject *)
JS_GetGlobalObject(JSContext *cx)
{
return cx->globalObject;
}
JS_PUBLIC_API(void)
JS_SetGlobalObject(JSContext *cx, JSObject *obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
cx->globalObject = obj;
if (!cx->hasfp())
cx->resetCompartment();
}
JS_PUBLIC_API(JSBool)
JS_InitStandardClasses(JSContext *cx, JSObject *obj)
{
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
/*
* JS_SetGlobalObject might or might not change cx's compartment, so call
* it before assertSameCompartment. (The API contract is that *after* this,
* cx and obj must be in the same compartment.)
*/
if (!cx->globalObject)
JS_SetGlobalObject(cx, obj);
assertSameCompartment(cx, obj);
Rooted<GlobalObject*> global(cx, &obj->global());
return GlobalObject::initStandardClasses(cx, global);
}
#define CLASP(name) (&name##Class)
#define TYPED_ARRAY_CLASP(type) (&TypedArray::classes[TypedArray::type])
#define EAGER_ATOM(name) NAME_OFFSET(name)
#define EAGER_CLASS_ATOM(name) CLASS_NAME_OFFSET(name)
#define EAGER_ATOM_AND_CLASP(name) EAGER_CLASS_ATOM(name), CLASP(name)
typedef struct JSStdName {
JSClassInitializerOp init;
size_t atomOffset; /* offset of atom pointer in JSAtomState */
Class *clasp;
} JSStdName;
static PropertyName *
StdNameToPropertyName(JSContext *cx, 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 JSStdName standard_class_atoms[] = {
{js_InitFunctionClass, EAGER_ATOM_AND_CLASP(Function)},
{js_InitObjectClass, EAGER_ATOM_AND_CLASP(Object)},
{js_InitArrayClass, EAGER_ATOM_AND_CLASP(Array)},
{js_InitBooleanClass, EAGER_ATOM_AND_CLASP(Boolean)},
{js_InitDateClass, EAGER_ATOM_AND_CLASP(Date)},
{js_InitMathClass, EAGER_ATOM_AND_CLASP(Math)},
{js_InitNumberClass, EAGER_ATOM_AND_CLASP(Number)},
{js_InitStringClass, EAGER_ATOM_AND_CLASP(String)},
{js_InitExceptionClasses, EAGER_ATOM_AND_CLASP(Error)},
{js_InitRegExpClass, EAGER_ATOM_AND_CLASP(RegExp)},
#if JS_HAS_XML_SUPPORT
{js_InitXMLClass, EAGER_ATOM_AND_CLASP(XML)},
{js_InitNamespaceClass, EAGER_ATOM_AND_CLASP(Namespace)},
{js_InitQNameClass, EAGER_ATOM_AND_CLASP(QName)},
#endif
#if JS_HAS_GENERATORS
{js_InitIteratorClasses, EAGER_ATOM_AND_CLASP(StopIteration)},
#endif
{js_InitJSONClass, EAGER_ATOM_AND_CLASP(JSON)},
{js_InitTypedArrayClasses, EAGER_CLASS_ATOM(ArrayBuffer), &js::ArrayBufferObject::protoClass},
{js_InitWeakMapClass, EAGER_CLASS_ATOM(WeakMap), &js::WeakMapClass},
{js_InitMapClass, EAGER_CLASS_ATOM(Map), &js::MapObject::class_},
{js_InitSetClass, EAGER_CLASS_ATOM(Set), &js::SetObject::class_},
{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 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), CLASP(Number)},
{js_InitNumberClass, EAGER_ATOM(Infinity), CLASP(Number)},
{js_InitNumberClass, EAGER_ATOM(isNaN), CLASP(Number)},
{js_InitNumberClass, EAGER_ATOM(isFinite), CLASP(Number)},
{js_InitNumberClass, EAGER_ATOM(parseFloat), CLASP(Number)},
{js_InitNumberClass, EAGER_ATOM(parseInt), CLASP(Number)},
/* String global functions. */
{js_InitStringClass, EAGER_ATOM(escape), CLASP(String)},
{js_InitStringClass, EAGER_ATOM(unescape), CLASP(String)},
{js_InitStringClass, EAGER_ATOM(decodeURI), CLASP(String)},
{js_InitStringClass, EAGER_ATOM(encodeURI), CLASP(String)},
{js_InitStringClass, EAGER_ATOM(decodeURIComponent), CLASP(String)},
{js_InitStringClass, EAGER_ATOM(encodeURIComponent), CLASP(String)},
#if JS_HAS_UNEVAL
{js_InitStringClass, EAGER_ATOM(uneval), CLASP(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)},
#if JS_HAS_XML_SUPPORT
{js_InitXMLClass, EAGER_ATOM(XMLList), CLASP(XML)},
{js_InitXMLClass, EAGER_ATOM(isXMLName), CLASP(XML)},
#endif
#if JS_HAS_GENERATORS
{js_InitIteratorClasses, EAGER_ATOM_AND_CLASP(Iterator)},
#endif
/* Typed Arrays */
{js_InitTypedArrayClasses, EAGER_CLASS_ATOM(ArrayBuffer), &ArrayBufferClass},
{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), &DataViewClass},
{js_InitWeakMapClass, EAGER_ATOM_AND_CLASP(WeakMap)},
{js_InitProxyClass, EAGER_ATOM_AND_CLASP(Proxy)},
{NULL, 0, NULL}
};
static 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}
};
JS_PUBLIC_API(JSBool)
JS_ResolveStandardClass(JSContext *cx, JSObject *obj_, jsid id, JSBool *resolved)
{
JSString *idstr;
JSRuntime *rt;
JSAtom *atom;
JSStdName *stdnm;
unsigned i;
RootedObject obj(cx, obj_);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
*resolved = false;
rt = cx->runtime;
if (!rt->hasContexts() || !JSID_IS_ATOM(id))
return true;
idstr = JSID_TO_STRING(id);
/* Check whether we're resolving 'undefined', and define it if so. */
atom = rt->atomState.typeAtoms[JSTYPE_VOID];
if (idstr == atom) {
*resolved = true;
return obj->defineProperty(cx, 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;
}
}
if (!stdnm && !obj->getProto()) {
/*
* 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->isGlobal());
if (stdnm->clasp->flags & JSCLASS_IS_ANONYMOUS)
return true;
if (IsStandardClassResolved(obj, stdnm->clasp))
return true;
#if JS_HAS_XML_SUPPORT
if ((stdnm->init == js_InitXMLClass ||
stdnm->init == js_InitNamespaceClass ||
stdnm->init == js_InitQNameClass) &&
!VersionHasAllowXML(cx->findVersion()))
{
return true;
}
#endif
if (!stdnm->init(cx, obj))
return false;
*resolved = true;
}
return true;
}
JS_PUBLIC_API(JSBool)
JS_EnumerateStandardClasses(JSContext *cx, JSObject *obj_)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj_);
RootedObject obj(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.
*/
RootedPropertyName undefinedName(cx, cx->runtime->atomState.typeAtoms[JSTYPE_VOID]);
RootedId undefinedId(cx, NameToId(undefinedName));
if (!obj->nativeContains(cx, undefinedId) &&
!obj->defineProperty(cx, 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 JS_HAS_XML_SUPPORT
&& ((stdnm.init != js_InitXMLClass &&
stdnm.init != js_InitNamespaceClass &&
stdnm.init != js_InitQNameClass) ||
VersionHasAllowXML(cx->findVersion()))
#endif
)
{
if (!stdnm.init(cx, obj))
return false;
}
}
return true;
}
static JSIdArray *
NewIdArray(JSContext *cx, int length)
{
JSIdArray *ida;
ida = (JSIdArray *)
cx->calloc_(offsetof(JSIdArray, vector) + length * sizeof(jsval));
if (ida)
ida->length = length;
return ida;
}
/*
* Unlike realloc(3), this function frees ida on failure.
*/
static JSIdArray *
SetIdArrayLength(JSContext *cx, JSIdArray *ida, int length)
{
JSIdArray *rida;
rida = (JSIdArray *)
JS_realloc(cx, ida,
offsetof(JSIdArray, vector) + length * sizeof(jsval));
if (!rida) {
JS_DestroyIdArray(cx, ida);
} else {
rida->length = length;
}
return rida;
}
static JSIdArray *
AddNameToArray(JSContext *cx, PropertyName *name, JSIdArray *ida, int *ip)
{
int i = *ip;
int length = ida->length;
if (i >= length) {
ida = SetIdArrayLength(cx, ida, JS_MAX(length * 2, 8));
if (!ida)
return NULL;
JS_ASSERT(i < ida->length);
}
ida->vector[i].init(NameToId(name));
*ip = i + 1;
return ida;
}
static JSIdArray *
EnumerateIfResolved(JSContext *cx, JSObject *obj, PropertyName *name, JSIdArray *ida,
int *ip, JSBool *foundp)
{
RootedId id(cx, NameToId(name));
*foundp = obj->nativeContains(cx, id);
if (*foundp)
ida = AddNameToArray(cx, name, ida, ip);
return ida;
}
JS_PUBLIC_API(JSIdArray *)
JS_EnumerateResolvedStandardClasses(JSContext *cx, JSObject *obj, JSIdArray *ida)
{
JSRuntime *rt;
int i, j, k;
PropertyName *name;
JSBool found;
JSClassInitializerOp init;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, ida);
rt = cx->runtime;
if (ida) {
i = ida->length;
} else {
ida = NewIdArray(cx, 8);
if (!ida)
return NULL;
i = 0;
}
/* Check whether 'undefined' has been resolved and enumerate it if so. */
name = rt->atomState.typeAtoms[JSTYPE_VOID];
ida = EnumerateIfResolved(cx, obj, name, ida, &i, &found);
if (!ida)
return NULL;
/* Enumerate only classes that *have* been resolved. */
for (j = 0; standard_class_atoms[j].init; j++) {
name = OFFSET_TO_NAME(rt, standard_class_atoms[j].atomOffset);
ida = EnumerateIfResolved(cx, obj, name, ida, &i, &found);
if (!ida)
return NULL;
if (found) {
init = standard_class_atoms[j].init;
for (k = 0; standard_class_names[k].init; k++) {
if (standard_class_names[k].init == init) {
name = StdNameToPropertyName(cx, &standard_class_names[k]);
ida = AddNameToArray(cx, name, ida, &i);
if (!ida)
return NULL;
}
}
if (init == js_InitObjectClass) {
for (k = 0; object_prototype_names[k].init; k++) {
name = StdNameToPropertyName(cx, &object_prototype_names[k]);
ida = AddNameToArray(cx, name, ida, &i);
if (!ida)
return NULL;
}
}
}
}
/* Trim to exact length. */
return SetIdArrayLength(cx, ida, i);
}
#undef CLASP
#undef EAGER_ATOM
#undef EAGER_CLASS_ATOM
#undef EAGER_ATOM_CLASP
JS_PUBLIC_API(JSBool)
JS_GetClassObject(JSContext *cx, JSObject *obj_, JSProtoKey key, JSObject **objp_)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedObject obj(cx, obj_);
RootedObject objp(cx);
assertSameCompartment(cx, obj);
bool result = js_GetClassObject(cx, obj, key, &objp);
*objp_ = objp;
return result;
}
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_GetGlobalForObject(JSContext *cx, JSObject *obj)
{
AssertHeapIsIdle(cx);
assertSameCompartment(cx, obj);
return &obj->global();
}
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)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return GetGlobalForScopeChain(cx);
}
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_MallocInCompartment(JSCompartment *comp, size_t nbytes)
{
comp->mallocInCompartment(nbytes);
}
JS_PUBLIC_API(void)
JS_FreeInCompartment(JSCompartment *comp, size_t nbytes)
{
comp->freeInCompartment(nbytes);
}
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 cx->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, 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(JSBool)
JS_NewNumberValue(JSContext *cx, double d, jsval *rval)
{
AssertHeapIsIdle(cx);
d = JS_CANONICALIZE_NAN(d);
rval->setNumber(d);
return JS_TRUE;
}
#undef JS_AddRoot
JS_PUBLIC_API(JSBool)
JS_AddValueRoot(JSContext *cx, jsval *vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_AddRoot(cx, vp, NULL);
}
JS_PUBLIC_API(JSBool)
JS_AddStringRoot(JSContext *cx, JSString **rp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_AddGCThingRoot(cx, (void **)rp, NULL);
}
JS_PUBLIC_API(JSBool)
JS_AddObjectRoot(JSContext *cx, JSObject **rp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_AddGCThingRoot(cx, (void **)rp, NULL);
}
JS_PUBLIC_API(JSBool)
JS_AddGCThingRoot(JSContext *cx, void **rp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_AddGCThingRoot(cx, (void **)rp, NULL);
}
JS_PUBLIC_API(JSBool)
JS_AddNamedValueRoot(JSContext *cx, jsval *vp, const char *name)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_AddRoot(cx, vp, name);
}
JS_PUBLIC_API(JSBool)
JS_AddNamedStringRoot(JSContext *cx, JSString **rp, const char *name)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_AddGCThingRoot(cx, (void **)rp, name);
}
JS_PUBLIC_API(JSBool)
JS_AddNamedObjectRoot(JSContext *cx, JSObject **rp, const char *name)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_AddGCThingRoot(cx, (void **)rp, name);
}
JS_PUBLIC_API(JSBool)
JS_AddNamedScriptRoot(JSContext *cx, JSScript **rp, const char *name)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_AddGCThingRoot(cx, (void **)rp, name);
}
JS_PUBLIC_API(JSBool)
JS_AddNamedGCThingRoot(JSContext *cx, void **rp, const char *name)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_AddGCThingRoot(cx, (void **)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_RemoveGCThingRoot(JSContext *cx, void **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_RemoveScriptRoot(JSRuntime *rt, JSScript **rp)
{
js_RemoveRoot(rt, (void *)rp);
}
JS_NEVER_INLINE JS_PUBLIC_API(void)
JS_AnchorPtr(void *p)
{
}
#ifdef DEBUG
JS_PUBLIC_API(void)
JS_DumpNamedRoots(JSRuntime *rt,
void (*dump)(const char *name, void *rp, JSGCRootType type, void *data),
void *data)
{
js_DumpNamedRoots(rt, dump, data);
}
#endif /* DEBUG */
JS_PUBLIC_API(uint32_t)
JS_MapGCRoots(JSRuntime *rt, JSGCRootMapFun map, void *data)
{
return js_MapGCRoots(rt, map, data);
}
JS_PUBLIC_API(JSBool)
JS_LockGCThing(JSContext *cx, void *thing)
{
JSBool ok;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
ok = js_LockGCThingRT(cx->runtime, thing);
if (!ok)
JS_ReportOutOfMemory(cx);
return ok;
}
JS_PUBLIC_API(JSBool)
JS_LockGCThingRT(JSRuntime *rt, void *thing)
{
return js_LockGCThingRT(rt, thing);
}
JS_PUBLIC_API(JSBool)
JS_UnlockGCThing(JSContext *cx, void *thing)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
js_UnlockGCThingRT(cx->runtime, thing);
return true;
}
JS_PUBLIC_API(JSBool)
JS_UnlockGCThingRT(JSRuntime *rt, void *thing)
{
js_UnlockGCThingRT(rt, thing);
return true;
}
JS_PUBLIC_API(void)
JS_SetExtraGCRootsTracer(JSRuntime *rt, JSTraceDataOp traceOp, void *data)
{
AssertHeapIsIdle(rt);
rt->gcBlackRootsTraceOp = traceOp;
rt->gcBlackRootsData = data;
}
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_CallTracer(JSTracer *trc, void *thing, JSGCTraceKind kind)
{
js::CallTracer(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_SHAPE:
name = "shape";
break;
case JSTRACE_BASE_SHAPE:
name = "base_shape";
break;
case JSTRACE_TYPE_OBJECT:
name = "type_object";
break;
#if JS_HAS_XML_SUPPORT
case JSTRACE_XML:
name = "xml";
break;
#endif
}
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;
Class *clasp = obj->getClass();
if (clasp == &FunctionClass) {
JSFunction *fun = obj->toFunction();
if (!fun) {
JS_snprintf(buf, bufsize, " <newborn>");
} else if (fun != obj) {
JS_snprintf(buf, bufsize, " %p", fun);
} else {
if (fun->atom) {
*buf++ = ' ';
bufsize--;
PutEscapedString(buf, bufsize, fun->atom, 0);
}
}
} else if (clasp->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_SHAPE:
case JSTRACE_BASE_SHAPE:
case JSTRACE_TYPE_OBJECT:
break;
#if JS_HAS_XML_SUPPORT
case JSTRACE_XML:
{
extern const char *js_xml_class_str[];
JSXML *xml = (JSXML *)thing;
JS_snprintf(buf, bufsize, " %s", js_xml_class_str[xml->xml_class]);
break;
}
#endif
}
}
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 *) OffTheBooks::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;
Foreground::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);
PrepareForFullGC(rt);
GC(rt, GC_NORMAL, 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(void *thing)
{
gc::Cell *t = static_cast<gc::Cell *>(thing);
bool isMarked = IsCellMarked(&t);
JS_ASSERT(t == thing);
return !isMarked;
}
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;
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;
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)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSString *s = JSExternalString::new_(cx, chars, length, fin);
Probes::createString(cx, s, length);
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->nativeStackLimit = UINTPTR_MAX;
} else {
JS_ASSERT(rt->nativeStackBase <= size_t(-1) - stackSize);
rt->nativeStackLimit = rt->nativeStackBase + stackSize - 1;
}
#else
if (stackSize == 0) {
rt->nativeStackLimit = 0;
} else {
JS_ASSERT(rt->nativeStackBase >= stackSize);
rt->nativeStackLimit = rt->nativeStackBase - (stackSize - 1);
}
#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 v, jsid *idp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v);
return ValueToId(cx, v, idp);
}
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 *obj, JSType hint, jsval *vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JS_ASSERT(obj != NULL);
JS_ASSERT(hint == JSTYPE_VOID || hint == JSTYPE_STRING || hint == JSTYPE_NUMBER);
return obj->defaultValue(cx, hint, vp);
}
JS_PUBLIC_API(JSBool)
JS_PropertyStub(JSContext *cx, JSHandleObject obj, JSHandleId id, jsval *vp)
{
return JS_TRUE;
}
JS_PUBLIC_API(JSBool)
JS_StrictPropertyStub(JSContext *cx, JSHandleObject obj, JSHandleId id, JSBool strict, jsval *vp)
{
return JS_TRUE;
}
JS_PUBLIC_API(JSBool)
JS_EnumerateStub(JSContext *cx, JSHandleObject obj)
{
return JS_TRUE;
}
JS_PUBLIC_API(JSBool)
JS_ResolveStub(JSContext *cx, JSHandleObject obj, JSHandleId id)
{
return JS_TRUE;
}
JS_PUBLIC_API(JSBool)
JS_ConvertStub(JSContext *cx, JSHandleObject obj, JSType type, jsval *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 *obj_, JSObject *parent_proto,
JSClass *clasp, JSNative constructor, unsigned nargs,
JSPropertySpec *ps, JSFunctionSpec *fs,
JSPropertySpec *static_ps, JSFunctionSpec *static_fs)
{
RootedObject obj(cx, obj_);
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 *ctor, JSObject *proto)
{
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 *obj, JSClass *clasp, jsval *argv)
{
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 *obj_, jsval v, JSBool *bp)
{
RootedObject obj(cx, obj_);
AssertHeapIsIdle(cx);
assertSameCompartment(cx, obj, v);
return HasInstance(cx, obj, &v, 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 *obj, JSClass *clasp, jsval *argv)
{
if (!JS_InstanceOf(cx, obj, clasp, argv))
return NULL;
return obj->getPrivate();
}
JS_PUBLIC_API(JSObject *)
JS_GetPrototype(JSObject *obj)
{
return obj->getProto();
}
JS_PUBLIC_API(JSBool)
JS_SetPrototype(JSContext *cx, JSObject *obj_, JSObject *proto_)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj_, proto_);
Rooted<JSObject*> obj(cx, obj_);
Rooted<JSObject*> proto(cx, proto_);
return SetProto(cx, obj, proto, JS_FALSE);
}
JS_PUBLIC_API(JSObject *)
JS_GetParent(JSObject *obj)
{
JS_ASSERT(!obj->isScope());
return obj->getParent();
}
JS_PUBLIC_API(JSBool)
JS_SetParent(JSContext *cx, JSObject *obj_, JSObject *parent_)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JS_ASSERT(!obj_->isScope());
JS_ASSERT(parent_ || !obj_->getParent());
assertSameCompartment(cx, obj_, parent_);
Rooted<JSObject*> obj(cx, obj_);
Rooted<JSObject*> parent(cx, parent_);
return JSObject::setParent(cx, obj, parent);
}
JS_PUBLIC_API(JSObject *)
JS_GetConstructor(JSContext *cx, JSObject *proto)
{
Value cval;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, proto);
{
JSAutoResolveFlags rf(cx, JSRESOLVE_QUALIFIED);
if (!proto->getProperty(cx, cx->runtime->atomState.constructorAtom, &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 AutoHoldCompartment {
public:
explicit AutoHoldCompartment(JSCompartment *compartment JS_GUARD_OBJECT_NOTIFIER_PARAM)
: holdp(&compartment->hold)
{
JS_GUARD_OBJECT_NOTIFIER_INIT;
*holdp = true;
}
~AutoHoldCompartment() {
*holdp = false;
}
private:
bool *holdp;
JS_DECL_USE_GUARD_OBJECT_NOTIFIER
};
JS_PUBLIC_API(JSObject *)
JS_NewGlobalObject(JSContext *cx, JSClass *clasp, JSPrincipals *principals)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
JSCompartment *compartment = NewCompartment(cx, principals);
if (!compartment)
return NULL;
AutoHoldCompartment hold(compartment);
JSCompartment *saved = cx->compartment;
cx->setCompartment(compartment);
GlobalObject *global = GlobalObject::create(cx, Valueify(clasp));
cx->setCompartment(saved);
return global;
}
JS_PUBLIC_API(JSObject *)
JS_NewObject(JSContext *cx, JSClass *jsclasp, JSObject *proto_, JSObject *parent_)
{
RootedObject proto(cx, proto_);
RootedObject parent(cx, parent_);
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 != &FunctionClass);
JS_ASSERT(!(clasp->flags & JSCLASS_IS_GLOBAL));
JSObject *obj = NewObjectWithClassProto(cx, clasp, proto, parent);
AssertRootingUnnecessary safe(cx);
if (obj) {
if (clasp->ext.equality)
MarkTypeObjectFlags(cx, obj, OBJECT_FLAG_SPECIAL_EQUALITY);
}
JS_ASSERT_IF(obj, obj->getParent());
return obj;
}
JS_PUBLIC_API(JSObject *)
JS_NewObjectWithGivenProto(JSContext *cx, JSClass *jsclasp, JSObject *proto, JSObject *parent)
{
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 != &FunctionClass);
JS_ASSERT(!(clasp->flags & JSCLASS_IS_GLOBAL));
JSObject *obj = NewObjectWithGivenProto(cx, clasp, proto, parent);
AssertRootingUnnecessary safe(cx);
if (obj)
MarkTypeObjectUnknownProperties(cx, obj->type());
return obj;
}
JS_PUBLIC_API(JSObject *)
JS_NewObjectForConstructor(JSContext *cx, JSClass *clasp, const jsval *vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, *vp);
RootedObject obj(cx, JSVAL_TO_OBJECT(*vp));
return js_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 *obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
return obj->freeze(cx);
}
JS_PUBLIC_API(JSBool)
JS_DeepFreezeObject(JSContext *cx, JSObject *obj_)
{
RootedObject obj(cx, obj_);
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 (!obj->freeze(cx))
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;
if (!JS_DeepFreezeObject(cx, &v.toObject()))
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 obj->lookupGeneric(cx, 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, jsid id,
HandleShape shape, Value *vp)
{
if (!shape) {
/* XXX bad API: no way to tell "not defined" from "void value" */
vp->setUndefined();
return JS_TRUE;
}
if (obj2->isNative()) {
/* Peek at the native property's slot value, without doing a Get. */
if (shape->hasSlot()) {
*vp = obj2->nativeGetSlot(shape->slot());
return true;
}
} else {
if (obj2->isDenseArray())
return js_GetDenseArrayElementValue(cx, obj2, id, vp);
if (obj2->isProxy()) {
AutoPropertyDescriptorRooter desc(cx);
if (!Proxy::getPropertyDescriptor(cx, obj2, id, false, &desc))
return false;
if (!(desc.attrs & JSPROP_SHARED)) {
*vp = desc.value;
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 *obj_, jsid id_, jsval *vp)
{
RootedId id(cx, id_);
RootedObject obj(cx, obj_);
RootedObject obj2(cx);
RootedShape prop(cx);
return LookupPropertyById(cx, obj, id, JSRESOLVE_QUALIFIED, &obj2, &prop) &&
LookupResult(cx, obj, obj2, id, prop, vp);
}
JS_PUBLIC_API(JSBool)
JS_LookupElement(JSContext *cx, JSObject *obj, uint32_t index, jsval *vp)
{
CHECK_REQUEST(cx);
jsid id;
if (!IndexToId(cx, index, &id))
return false;
return JS_LookupPropertyById(cx, obj, id, vp);
}
JS_PUBLIC_API(JSBool)
JS_LookupProperty(JSContext *cx, JSObject *obj, const char *name, jsval *vp)
{
JSAtom *atom = js_Atomize(cx, name, strlen(name));
return atom && JS_LookupPropertyById(cx, obj, AtomToId(atom), vp);
}
JS_PUBLIC_API(JSBool)
JS_LookupUCProperty(JSContext *cx, JSObject *obj_, const jschar *name, size_t namelen, jsval *vp)
{
RootedObject obj(cx, obj_);
JSAtom *atom = js_AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
return atom && JS_LookupPropertyById(cx, obj, AtomToId(atom), vp);
}
JS_PUBLIC_API(JSBool)
JS_LookupPropertyWithFlagsById(JSContext *cx, JSObject *obj_, jsid id_, unsigned flags,
JSObject **objp_, jsval *vp)
{
RootedObject obj(cx, obj_);
RootedObject objp(cx, *objp_);
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)
: obj->lookupGeneric(cx, id, &objp, &prop)))
return false;
if (!LookupResult(cx, obj, objp, id, prop, vp))
return false;
*objp_ = objp;
return true;
}
JS_PUBLIC_API(JSBool)
JS_LookupPropertyWithFlags(JSContext *cx, JSObject *obj, const char *name, unsigned flags, jsval *vp)
{
JSObject *obj2;
JSAtom *atom = js_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 *obj_, jsid id_, JSBool *foundp)
{
RootedObject obj(cx, obj_);
RootedId id(cx, id_);
RootedObject obj2(cx);
RootedShape prop(cx);
JSBool ok = LookupPropertyById(cx, obj, id, JSRESOLVE_QUALIFIED | JSRESOLVE_DETECTING,
&obj2, &prop);
*foundp = (prop != NULL);
return ok;
}
JS_PUBLIC_API(JSBool)
JS_HasElement(JSContext *cx, JSObject *obj, uint32_t index, JSBool *foundp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
jsid id;
if (!IndexToId(cx, index, &id))
return false;
return JS_HasPropertyById(cx, obj, id, foundp);
}
JS_PUBLIC_API(JSBool)
JS_HasProperty(JSContext *cx, JSObject *obj, const char *name, JSBool *foundp)
{
JSAtom *atom = js_Atomize(cx, name, strlen(name));
return atom && JS_HasPropertyById(cx, obj, AtomToId(atom), foundp);
}
JS_PUBLIC_API(JSBool)
JS_HasUCProperty(JSContext *cx, JSObject *obj_, const jschar *name, size_t namelen, JSBool *foundp)
{
RootedObject obj(cx, obj_);
JSAtom *atom = js_AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
return atom && JS_HasPropertyById(cx, obj, AtomToId(atom), foundp);
}
JS_PUBLIC_API(JSBool)
JS_AlreadyHasOwnPropertyById(JSContext *cx, JSObject *obj_, jsid id_, JSBool *foundp)
{
RootedId id(cx, id_);
RootedObject obj(cx, obj_);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
if (!obj->isNative()) {
RootedObject obj2(cx);
RootedShape prop(cx);
if (!LookupPropertyById(cx, obj, id, JSRESOLVE_QUALIFIED | JSRESOLVE_DETECTING,
&obj2, &prop)) {
return JS_FALSE;
}
*foundp = (obj == obj2);
return JS_TRUE;
}
*foundp = obj->nativeContains(cx, id);
return JS_TRUE;
}
JS_PUBLIC_API(JSBool)
JS_AlreadyHasOwnElement(JSContext *cx, JSObject *obj, uint32_t index, JSBool *foundp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
jsid id;
if (!IndexToId(cx, index, &id))
return false;
return JS_AlreadyHasOwnPropertyById(cx, obj, id, foundp);
}
JS_PUBLIC_API(JSBool)
JS_AlreadyHasOwnProperty(JSContext *cx, JSObject *obj, const char *name, JSBool *foundp)
{
JSAtom *atom = js_Atomize(cx, name, strlen(name));
return atom && JS_AlreadyHasOwnPropertyById(cx, obj, AtomToId(atom), foundp);
}
JS_PUBLIC_API(JSBool)
JS_AlreadyHasOwnUCProperty(JSContext *cx, JSObject *obj_, const jschar *name, size_t namelen,
JSBool *foundp)
{
RootedObject obj(cx, obj_);
JSAtom *atom = js_AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
return atom && JS_AlreadyHasOwnPropertyById(cx, obj, AtomToId(atom), foundp);
}
static JSBool
DefinePropertyById(JSContext *cx, HandleObject obj, HandleId id, HandleValue value,
PropertyOp getter, StrictPropertyOp setter, unsigned attrs,
unsigned flags, int tinyid)
{
/*
* 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)));
attrs &= ~JSPROP_NATIVE_ACCESSORS;
if (getter) {
JSObject *getobj = JS_NewFunction(cx, (Native) getter, 0, 0, &obj->global(), NULL);
if (!getobj)
return false;
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);
JSObject *setobj = JS_NewFunction(cx, (Native) setter, 1, 0, &obj->global(), NULL);
if (!setobj)
return false;
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, JSRESOLVE_QUALIFIED);
if (flags != 0 && obj->isNative()) {
return !!DefineNativeProperty(cx, obj, id, value, getter, setter,
attrs, flags, tinyid);
}
return obj->defineGeneric(cx, id, value, getter, setter, attrs);
}
JS_PUBLIC_API(JSBool)
JS_DefinePropertyById(JSContext *cx, JSObject *obj_, jsid id_, jsval value_,
JSPropertyOp getter, JSStrictPropertyOp setter, unsigned attrs)
{
RootedObject obj(cx, obj_);
RootedId id(cx, id_);
RootedValue value(cx, value_);
return DefinePropertyById(cx, obj, id, value, getter, setter, attrs, 0, 0);
}
JS_PUBLIC_API(JSBool)
JS_DefineElement(JSContext *cx, JSObject *obj_, uint32_t index, jsval value_,
JSPropertyOp getter, JSStrictPropertyOp setter, unsigned attrs)
{
RootedObject obj(cx, obj_);
RootedValue value(cx, value_);
AutoRooterGetterSetter gsRoot(cx, attrs, &getter, &setter);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedId id(cx);
if (!IndexToId(cx, index, id.address()))
return false;
return DefinePropertyById(cx, obj, id, value, getter, setter, attrs, 0, 0);
}
static JSBool
DefineProperty(JSContext *cx, JSObject *obj_, const char *name, const Value &value_,
PropertyOp getter, StrictPropertyOp setter, unsigned attrs,
unsigned flags, int tinyid)
{
RootedObject obj(cx, obj_);
RootedValue value(cx, value_);
AutoRooterGetterSetter gsRoot(cx, attrs, &getter, &setter);
RootedId id(cx);
if (attrs & JSPROP_INDEX) {
id = INT_TO_JSID(intptr_t(name));
attrs &= ~JSPROP_INDEX;
} else {
JSAtom *atom = js_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 *obj, const char *name, jsval value,
PropertyOp getter, JSStrictPropertyOp setter, unsigned attrs)
{
return DefineProperty(cx, obj, name, value, getter, setter, attrs, 0, 0);
}
JS_PUBLIC_API(JSBool)
JS_DefinePropertyWithTinyId(JSContext *cx, JSObject *obj, const char *name, int8_t tinyid,
jsval value, PropertyOp getter, JSStrictPropertyOp setter, unsigned attrs)
{
return DefineProperty(cx, obj, name, value, getter, setter, attrs, Shape::HAS_SHORTID, tinyid);
}
static JSBool
DefineUCProperty(JSContext *cx, JSObject *obj_, const jschar *name, size_t namelen,
const Value &value_, PropertyOp getter, StrictPropertyOp setter, unsigned attrs,
unsigned flags, int tinyid)
{
RootedObject obj(cx, obj_);
RootedValue value(cx, value_);
AutoRooterGetterSetter gsRoot(cx, attrs, &getter, &setter);
JSAtom *atom = js_AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return DefinePropertyById(cx, obj, id, value, getter, setter, attrs, flags, tinyid);
}
JS_PUBLIC_API(JSBool)
JS_DefineUCProperty(JSContext *cx, JSObject *obj, const jschar *name, size_t namelen,
jsval value, JSPropertyOp getter, JSStrictPropertyOp setter, unsigned attrs)
{
return DefineUCProperty(cx, obj, name, namelen, value, getter, setter, attrs, 0, 0);
}
JS_PUBLIC_API(JSBool)
JS_DefineUCPropertyWithTinyId(JSContext *cx, JSObject *obj, const jschar *name, size_t namelen,
int8_t tinyid, jsval value,
JSPropertyOp getter, JSStrictPropertyOp setter, unsigned attrs)
{
return DefineUCProperty(cx, obj, name, namelen, value, getter, setter, attrs,
Shape::HAS_SHORTID, tinyid);
}
JS_PUBLIC_API(JSBool)
JS_DefineOwnProperty(JSContext *cx, JSObject *obj_, jsid id_, jsval descriptor, JSBool *bp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj_, id_, descriptor);
Rooted<JSObject*> obj(cx, obj_);
Rooted<jsid> id(cx, id_);
return js_DefineOwnProperty(cx, obj, id, descriptor, bp);
}
JS_PUBLIC_API(JSObject *)
JS_DefineObject(JSContext *cx, JSObject *obj_, const char *name, JSClass *jsclasp,
JSObject *proto, unsigned attrs)
{
RootedObject obj(cx, obj_), nobj(cx);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, proto);
Class *clasp = Valueify(jsclasp);
if (!clasp)
clasp = &ObjectClass; /* default class is Object */
nobj = NewObjectWithClassProto(cx, clasp, proto, obj);
if (!nobj)
return NULL;
if (!DefineProperty(cx, obj, name, ObjectValue(*nobj), NULL, NULL, attrs, 0, 0))
return NULL;
return nobj;
}
JS_PUBLIC_API(JSBool)
JS_DefineConstDoubles(JSContext *cx, JSObject *obj_, JSConstDoubleSpec *cds)
{
RootedObject obj(cx, obj_);
JSBool ok;
unsigned attrs;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
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, NULL, NULL, attrs, 0, 0);
if (!ok)
break;
}
return ok;
}
JS_PUBLIC_API(JSBool)
JS_DefineProperties(JSContext *cx, JSObject *obj_, JSPropertySpec *ps)
{
JSBool ok;
RootedObject obj(cx, obj_);
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()) {
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, false, desc)
: Proxy::getPropertyDescriptor(cx, obj2, id, false, desc);
}
if (!obj2->getGenericAttributes(cx, 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 *obj_, jsid id_, unsigned flags,
JSPropertyDescriptor *desc_)
{
RootedId id(cx, id_);
RootedObject obj(cx, obj_);
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 *obj_, jsid id_,
unsigned *attrsp, JSBool *foundp,
JSPropertyOp *getterp, JSStrictPropertyOp *setterp)
{
RootedObject obj(cx, obj_);
RootedId id(cx, id_);
AutoPropertyDescriptorRooter desc(cx);
if (!GetPropertyDescriptorById(cx, obj, id, JSRESOLVE_QUALIFIED, 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 *obj, const char *name,
unsigned *attrsp, JSBool *foundp)
{
JSAtom *atom = js_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 *obj_, const jschar *name, size_t namelen,
unsigned *attrsp, JSBool *foundp)
{
RootedObject obj(cx, obj_);
JSAtom *atom = js_AtomizeChars(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 *obj, const char *name,
unsigned *attrsp, JSBool *foundp,
JSPropertyOp *getterp, JSStrictPropertyOp *setterp)
{
JSAtom *atom = js_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 *obj_,
const jschar *name, size_t namelen,
unsigned *attrsp, JSBool *foundp,
JSPropertyOp *getterp, JSStrictPropertyOp *setterp)
{
RootedObject obj(cx, obj_);
JSAtom *atom = js_AtomizeChars(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 *obj_, jsid id_, jsval *vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
Rooted<JSObject*> obj(cx, obj_);
Rooted<jsid> id(cx, id_);
return GetOwnPropertyDescriptor(cx, obj, id, vp);
}
static JSBool
SetPropertyAttributesById(JSContext *cx, HandleObject obj, HandleId id, unsigned attrs, JSBool *foundp)
{
RootedObject obj2(cx);
RootedShape shape(cx);
if (!LookupPropertyById(cx, obj, id, JSRESOLVE_QUALIFIED, &obj2, &shape))
return false;
if (!shape || obj != obj2) {
*foundp = false;
return true;
}
JSBool ok = obj->isNative()
? obj->changePropertyAttributes(cx, shape, attrs)
: obj->setGenericAttributes(cx, id, &attrs);
if (ok)
*foundp = true;
return ok;
}
JS_PUBLIC_API(JSBool)
JS_SetPropertyAttributes(JSContext *cx, JSObject *obj_, const char *name,
unsigned attrs, JSBool *foundp)
{
RootedObject obj(cx, obj_);
JSAtom *atom = js_Atomize(cx, name, strlen(name));
Rooted<jsid> id(cx, AtomToId(atom));
return atom && SetPropertyAttributesById(cx, obj, id, attrs, foundp);
}
JS_PUBLIC_API(JSBool)
JS_SetUCPropertyAttributes(JSContext *cx, JSObject *obj_, const jschar *name, size_t namelen,
unsigned attrs, JSBool *foundp)
{
RootedObject obj(cx, obj_);
JSAtom *atom = js_AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
Rooted<jsid> id(cx, AtomToId(atom));
return atom && SetPropertyAttributesById(cx, obj, id, attrs, foundp);
}
JS_PUBLIC_API(JSBool)
JS_GetPropertyById(JSContext *cx, JSObject *obj, jsid id, jsval *vp)
{
return JS_ForwardGetPropertyTo(cx, obj, id, obj, vp);
}
JS_PUBLIC_API(JSBool)
JS_ForwardGetPropertyTo(JSContext *cx, JSObject *obj, jsid id_, JSObject *onBehalfOf_, jsval *vp)
{
RootedId id(cx, id_);
RootedObject onBehalfOf(cx, onBehalfOf_);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
assertSameCompartment(cx, onBehalfOf);
JSAutoResolveFlags rf(cx, JSRESOLVE_QUALIFIED);
return obj->getGeneric(cx, onBehalfOf, id, vp);
}
JS_PUBLIC_API(JSBool)
JS_GetPropertyByIdDefault(JSContext *cx, JSObject *obj_, jsid id_, jsval def, jsval *vp)
{
Rooted<JSObject*> obj(cx, obj_);
Rooted<jsid> id(cx, id_);
return baseops::GetPropertyDefault(cx, obj, id, def, vp);
}
JS_PUBLIC_API(JSBool)
JS_GetElement(JSContext *cx, JSObject *obj, uint32_t index, jsval *vp)
{
return JS_ForwardGetElementTo(cx, obj, index, obj, vp);
}
JS_PUBLIC_API(JSBool)
JS_ForwardGetElementTo(JSContext *cx, JSObject *obj, uint32_t index, JSObject *onBehalfOf_, jsval *vp)
{
RootedObject onBehalfOf(cx, onBehalfOf_);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAutoResolveFlags rf(cx, JSRESOLVE_QUALIFIED);
return obj->getElement(cx, onBehalfOf, index, vp);
}
JS_PUBLIC_API(JSBool)
JS_GetElementIfPresent(JSContext *cx, JSObject *obj, uint32_t index, JSObject *onBehalfOf_, jsval *vp, JSBool* present)
{
RootedObject onBehalfOf(cx, onBehalfOf_);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAutoResolveFlags rf(cx, JSRESOLVE_QUALIFIED);
bool isPresent;
if (!obj->getElementIfPresent(cx, onBehalfOf, index, vp, &isPresent))
return false;
*present = isPresent;
return true;
}
JS_PUBLIC_API(JSBool)
JS_GetProperty(JSContext *cx, JSObject *obj_, const char *name, jsval *vp)
{
RootedObject obj(cx, obj_);
JSAtom *atom = js_Atomize(cx, name, strlen(name));
return atom && JS_GetPropertyById(cx, obj, AtomToId(atom), vp);
}
JS_PUBLIC_API(JSBool)
JS_GetPropertyDefault(JSContext *cx, JSObject *obj_, const char *name, jsval def, jsval *vp)
{
RootedObject obj(cx, obj_);
JSAtom *atom = js_Atomize(cx, name, strlen(name));
return atom && JS_GetPropertyByIdDefault(cx, obj, AtomToId(atom), def, vp);
}
JS_PUBLIC_API(JSBool)
JS_GetUCProperty(JSContext *cx, JSObject *obj_, const jschar *name, size_t namelen, jsval *vp)
{
RootedObject obj(cx, obj_);
JSAtom *atom = js_AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
return atom && JS_GetPropertyById(cx, obj, AtomToId(atom), vp);
}
JS_PUBLIC_API(JSBool)
JS_GetMethodById(JSContext *cx, JSObject *obj_, jsid id_, JSObject **objp, jsval *vp)
{
RootedObject obj(cx, obj_);
RootedId id(cx, id_);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
if (!GetMethod(cx, obj, id, 0, vp))
return JS_FALSE;
if (objp)
*objp = obj;
return JS_TRUE;
}
JS_PUBLIC_API(JSBool)
JS_GetMethod(JSContext *cx, JSObject *obj, const char *name, JSObject **objp, jsval *vp)
{
JSAtom *atom = js_Atomize(cx, name, strlen(name));
return atom && JS_GetMethodById(cx, obj, AtomToId(atom), objp, vp);
}
JS_PUBLIC_API(JSBool)
JS_SetPropertyById(JSContext *cx, JSObject *objArg, jsid id_, jsval *vp)
{
RootedId id(cx, id_);
Rooted<JSObject*> obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
JSAutoResolveFlags rf(cx, JSRESOLVE_QUALIFIED | JSRESOLVE_ASSIGNING);
return obj->setGeneric(cx, obj, id, vp, false);
}
JS_PUBLIC_API(JSBool)
JS_SetElement(JSContext *cx, JSObject *obj_, uint32_t index, jsval *vp)
{
RootedObject obj(cx, obj_);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, *vp);
JSAutoResolveFlags rf(cx, JSRESOLVE_QUALIFIED | JSRESOLVE_ASSIGNING);
return obj->setElement(cx, obj, index, vp, false);
}
JS_PUBLIC_API(JSBool)
JS_SetProperty(JSContext *cx, JSObject *obj_, const char *name, jsval *vp)
{
RootedObject obj(cx, obj_);
JSAtom *atom = js_Atomize(cx, name, strlen(name));
return atom && JS_SetPropertyById(cx, obj, AtomToId(atom), vp);
}
JS_PUBLIC_API(JSBool)
JS_SetUCProperty(JSContext *cx, JSObject *obj_, const jschar *name, size_t namelen, jsval *vp)
{
RootedObject obj(cx, obj_);
JSAtom *atom = js_AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
return atom && JS_SetPropertyById(cx, obj, AtomToId(atom), vp);
}
JS_PUBLIC_API(JSBool)
JS_DeletePropertyById2(JSContext *cx, JSObject *obj, jsid id, jsval *rval)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
JSAutoResolveFlags rf(cx, JSRESOLVE_QUALIFIED);
if (JSID_IS_SPECIAL(id)) {
Rooted<SpecialId> sid(cx, JSID_TO_SPECIALID(id));
return obj->deleteSpecial(cx, sid, rval, false);
}
return obj->deleteByValue(cx, IdToValue(id), rval, false);
}
JS_PUBLIC_API(JSBool)
JS_DeleteElement2(JSContext *cx, JSObject *obj, uint32_t index, jsval *rval)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAutoResolveFlags rf(cx, JSRESOLVE_QUALIFIED);
return obj->deleteElement(cx, index, rval, false);
}
JS_PUBLIC_API(JSBool)
JS_DeleteProperty2(JSContext *cx, JSObject *obj_, const char *name, jsval *rval)
{
RootedObject obj(cx, obj_);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAutoResolveFlags rf(cx, JSRESOLVE_QUALIFIED);
JSAtom *atom = js_Atomize(cx, name, strlen(name));
if (!atom)
return false;
return obj->deleteByValue(cx, StringValue(atom), rval, false);
}
JS_PUBLIC_API(JSBool)
JS_DeleteUCProperty2(JSContext *cx, JSObject *obj_, const jschar *name, size_t namelen, jsval *rval)
{
RootedObject obj(cx, obj_);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAutoResolveFlags rf(cx, JSRESOLVE_QUALIFIED);
JSAtom *atom = js_AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
if (!atom)
return false;
return obj->deleteByValue(cx, StringValue(atom), rval, false);
}
JS_PUBLIC_API(JSBool)
JS_DeletePropertyById(JSContext *cx, JSObject *obj, jsid id)
{
jsval junk;
return JS_DeletePropertyById2(cx, obj, id, &junk);
}
JS_PUBLIC_API(JSBool)
JS_DeleteElement(JSContext *cx, JSObject *obj, uint32_t index)
{
jsval junk;
return JS_DeleteElement2(cx, obj, index, &junk);
}
JS_PUBLIC_API(JSBool)
JS_DeleteProperty(JSContext *cx, JSObject *obj, const char *name)
{
jsval junk;
return JS_DeleteProperty2(cx, obj, name, &junk);
}
JS_PUBLIC_API(void)
JS_ClearScope(JSContext *cx, JSObject *obj_)
{
RootedObject obj(cx, obj_);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
ClearOp clearOp = obj->getOps()->clear;
if (clearOp)
clearOp(cx, obj);
if (obj->isNative())
js_ClearNative(cx, obj);
/* Clear cached class objects on the global object. */
if (obj->isGlobal())
obj->asGlobal().clear(cx);
js_InitRandom(cx);
}
JS_PUBLIC_API(JSIdArray *)
JS_Enumerate(JSContext *cx, JSObject *obj)
{
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 Shape *, 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 = (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_PropertyStub, /* 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 *obj_)
{
RootedObject obj(cx, obj_);
JSObject *iterobj;
void *pdata;
int index;
JSIdArray *ida;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
iterobj = NewObjectWithClassProto(cx, &prop_iter_class, NULL, obj);
AssertRootingUnnecessary safe(cx);
if (!iterobj)
return NULL;
if (obj->isNative()) {
/* Native case: start with the last property in obj. */
pdata = (void *)obj->lastProperty();
index = -1;
} else {
/*
* Non-native case: enumerate a JSIdArray and keep it via private.
*
* Note: we have to make sure that we root obj around the call to
* JS_Enumerate to protect against multiple allocations under it.
*/
ida = JS_Enumerate(cx, obj);
if (!ida)
return NULL;
pdata = ida;
index = ida->length;
}
/* iterobj cannot escape to other threads here. */
iterobj->setPrivate(pdata);
iterobj->setSlot(JSSLOT_ITER_INDEX, Int32Value(index));
return iterobj;
}
JS_PUBLIC_API(JSBool)
JS_NextProperty(JSContext *cx, JSObject *iterobj, jsid *idp)
{
AssertRootingUnnecessary safe(cx);
int32_t i;
Shape *shape;
JSIdArray *ida;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, iterobj);
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 *) iterobj->getPrivate();
while (shape->previous() && !shape->enumerable())
shape = shape->previous();
if (!shape->previous()) {
JS_ASSERT(shape->isEmptyShape());
*idp = JSID_VOID;
} else {
iterobj->setPrivate(const_cast<Shape *>(shape->previous().get()));
*idp = shape->propid();
}
} else {
/* Non-native case: use the ida enumerated when iterobj was created. */
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 JS_TRUE;
}
JS_PUBLIC_API(JSObject *)
JS_NewElementIterator(JSContext *cx, JSObject *obj_)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj_);
Rooted<JSObject*> obj(cx, obj_);
return ElementIteratorObject::create(cx, obj);
}
JS_PUBLIC_API(JSObject *)
JS_ElementIteratorStub(JSContext *cx, JSHandleObject obj, JSBool keysonly)
{
JS_ASSERT(!keysonly);
return JS_NewElementIterator(cx, obj);
}
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, jsval v)
{
obj->setReservedSlot(index, v);
}
JS_PUBLIC_API(JSObject *)
JS_NewArrayObject(JSContext *cx, int length, jsval *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 *obj)
{
assertSameCompartment(cx, obj);
return ObjectClassIs(*obj, ESClass_Array, cx);
}
JS_PUBLIC_API(JSBool)
JS_GetArrayLength(JSContext *cx, JSObject *obj, uint32_t *lengthp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
return js_GetLengthProperty(cx, obj, lengthp);
}
JS_PUBLIC_API(JSBool)
JS_SetArrayLength(JSContext *cx, JSObject *obj, uint32_t length)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
return js_SetLengthProperty(cx, obj, length);
}
JS_PUBLIC_API(JSBool)
JS_CheckAccess(JSContext *cx, JSObject *obj, jsid id_, JSAccessMode mode,
jsval *vp, unsigned *attrsp)
{
RootedId id(cx, id_);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
return CheckAccess(cx, obj, id, mode, vp, attrsp);
}
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 *parent_, const char *name)
{
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
JSAtom *atom;
RootedObject parent(cx, parent_);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, parent);
if (!name) {
atom = NULL;
} else {
atom = js_Atomize(cx, name, strlen(name));
if (!atom)
return NULL;
}
return js_NewFunction(cx, NULL, native, nargs, flags, parent, atom);
}
JS_PUBLIC_API(JSFunction *)
JS_NewFunctionById(JSContext *cx, JSNative native, unsigned nargs, unsigned flags, JSObject *parent_,
jsid id)
{
RootedObject parent(cx, parent_);
JS_ASSERT(JSID_IS_STRING(id));
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, parent);
return js_NewFunction(cx, NULL, native, nargs, flags, parent, JSID_TO_ATOM(id));
}
JS_PUBLIC_API(JSObject *)
JS_CloneFunctionObject(JSContext *cx, JSObject *funobj, JSObject *parent_)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, parent_); // XXX no funobj for now
RootedObject parent(cx, parent_);
if (!parent) {
if (cx->hasfp())
parent = cx->fp()->scopeChain();
if (!parent)
parent = cx->globalObject;
JS_ASSERT(parent);
}
if (!funobj->isFunction()) {
ReportIsNotFunction(cx, ObjectValue(*funobj));
return NULL;
}
/*
* If a function was compiled as compile-and-go or was compiled to be
* lexically nested inside some other script, we cannot clone it without
* breaking the compiler's assumptions.
*/
RootedFunction fun(cx, funobj->toFunction());
if (fun->isInterpreted() &&
(fun->script()->compileAndGo || fun->script()->enclosingStaticScope()))
{
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;
}
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(unsigned)
JS_GetFunctionFlags(JSFunction *fun)
{
return fun->flags;
}
JS_PUBLIC_API(uint16_t)
JS_GetFunctionArity(JSFunction *fun)
{
return fun->nargs;
}
JS_PUBLIC_API(JSBool)
JS_ObjectIsFunction(JSContext *cx, JSObject *obj)
{
return obj->isFunction();
}
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->isFunction())
return false;
JSFunction *fun = funobj->toFunction();
return fun->isNative() && fun->native() == call;
}
JS_PUBLIC_API(JSObject*)
JS_BindCallable(JSContext *cx, JSObject *callable, JSObject *newThis)
{
RootedObject target(cx, callable);
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)
{
JSFunctionSpec *fs = (JSFunctionSpec *)
vp->toObject().toFunction()->getExtendedSlot(0).toPrivate();
JS_ASSERT((fs->flags & JSFUN_GENERIC_NATIVE) != 0);
if (argc < 1) {
js_ReportMissingArg(cx, *vp, 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(cx, argc, vp);
}
JS_PUBLIC_API(JSBool)
JS_DefineFunctions(JSContext *cx, JSObject *obj_, JSFunctionSpec *fs)
{
RootedObject obj(cx, obj_);
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
unsigned flags;
RootedObject ctor(cx);
JSFunction *fun;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
for (; fs->name; fs++) {
flags = fs->flags;
RootedAtom atom(cx, js_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.
*/
if (flags & JSFUN_GENERIC_NATIVE) {
if (!ctor) {
ctor = JS_GetConstructor(cx, obj);
if (!ctor)
return JS_FALSE;
}
flags &= ~JSFUN_GENERIC_NATIVE;
fun = js_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(fs));
}
fun = js_DefineFunction(cx, obj, id, fs->call, fs->nargs, flags);
if (!fun)
return JS_FALSE;
}
return JS_TRUE;
}
JS_PUBLIC_API(JSFunction *)
JS_DefineFunction(JSContext *cx, JSObject *obj_, const char *name, JSNative call,
unsigned nargs, unsigned attrs)
{
RootedObject obj(cx, obj_);
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAtom *atom = js_Atomize(cx, name, strlen(name));
if (!atom)
return NULL;
Rooted<jsid> id(cx, AtomToId(atom));
return js_DefineFunction(cx, obj, id, call, nargs, attrs);
}
JS_PUBLIC_API(JSFunction *)
JS_DefineUCFunction(JSContext *cx, JSObject *obj_,
const jschar *name, size_t namelen, JSNative call,
unsigned nargs, unsigned attrs)
{
RootedObject obj(cx, obj_);
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAtom *atom = js_AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
if (!atom)
return NULL;
Rooted<jsid> id(cx, AtomToId(atom));
return js_DefineFunction(cx, obj, id, call, nargs, attrs);
}
extern JS_PUBLIC_API(JSFunction *)
JS_DefineFunctionById(JSContext *cx, JSObject *obj_, jsid id_, JSNative call,
unsigned nargs, unsigned attrs)
{
RootedObject obj(cx, obj_);
RootedId id(cx, id_);
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
return js_DefineFunction(cx, obj, id, call, nargs, attrs);
}
struct AutoLastFrameCheck {
AutoLastFrameCheck(JSContext *cx JS_GUARD_OBJECT_NOTIFIER_PARAM)
: cx(cx) {
JS_ASSERT(cx);
JS_GUARD_OBJECT_NOTIFIER_INIT;
}
~AutoLastFrameCheck() {
if (cx->isExceptionPending() &&
!JS_IsRunning(cx) &&
!cx->hasRunOption(JSOPTION_DONT_REPORT_UNCAUGHT)) {
js_ReportUncaughtException(cx);
}
}
private:
JSContext *cx;
JS_DECL_USE_GUARD_OBJECT_NOTIFIER
};
static JSScript *
CompileUCScriptForPrincipalsCommon(JSContext *cx, JSObject *obj_,
JSPrincipals *principals, JSPrincipals *originPrincipals,
const jschar *chars, size_t length,
const char *filename, unsigned lineno, JSVersion version)
{
RootedObject obj(cx, obj_);
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, principals);
AutoLastFrameCheck lfc(cx);
bool compileAndGo = cx->hasRunOption(JSOPTION_COMPILE_N_GO);
bool noScriptRval = cx->hasRunOption(JSOPTION_NO_SCRIPT_RVAL);
return frontend::CompileScript(cx, obj, NULL, principals, originPrincipals,
compileAndGo, noScriptRval, chars, length,
filename, lineno, version);
}
extern JS_PUBLIC_API(JSScript *)
JS_CompileUCScriptForPrincipalsVersion(JSContext *cx, JSObject *obj,
JSPrincipals *principals,
const jschar *chars, size_t length,
const char *filename, unsigned lineno,
JSVersion version)
{
AutoVersionAPI avi(cx, version);
return CompileUCScriptForPrincipalsCommon(cx, obj, principals, NULL, chars, length,
filename, lineno, avi.version());
}
extern JS_PUBLIC_API(JSScript *)
JS_CompileUCScriptForPrincipalsVersionOrigin(JSContext *cx, JSObject *obj,
JSPrincipals *principals,
JSPrincipals *originPrincipals,
const jschar *chars, size_t length,
const char *filename, unsigned lineno,
JSVersion version)
{
AutoVersionAPI avi(cx, version);
return CompileUCScriptForPrincipalsCommon(cx, obj, principals, originPrincipals,
chars, length, filename, lineno, avi.version());
}
JS_PUBLIC_API(JSScript *)
JS_CompileUCScriptForPrincipals(JSContext *cx, JSObject *obj, JSPrincipals *principals,
const jschar *chars, size_t length,
const char *filename, unsigned lineno)
{
return CompileUCScriptForPrincipalsCommon(cx, obj, principals, NULL, chars, length,
filename, lineno, cx->findVersion());
}
JS_PUBLIC_API(JSScript *)
JS_CompileUCScript(JSContext *cx, JSObject *obj, const jschar *chars, size_t length,
const char *filename, unsigned lineno)
{
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
return JS_CompileUCScriptForPrincipals(cx, obj, NULL, chars, length, filename, lineno);
}
JS_PUBLIC_API(JSScript *)
JS_CompileScriptForPrincipalsVersion(JSContext *cx, JSObject *obj,
JSPrincipals *principals,
const char *bytes, size_t length,
const char *filename, unsigned lineno,
JSVersion version)
{
AutoVersionAPI ava(cx, version);
return JS_CompileScriptForPrincipals(cx, obj, principals, bytes, length, filename, lineno);
}
JS_PUBLIC_API(JSScript *)
JS_CompileScriptForPrincipals(JSContext *cx, JSObject *obj_,
JSPrincipals *principals,
const char *bytes, size_t length,
const char *filename, unsigned lineno)
{
RootedObject obj(cx, obj_);
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
jschar *chars = InflateString(cx, bytes, &length);
if (!chars)
return NULL;
JSScript *script =
JS_CompileUCScriptForPrincipals(cx, obj, principals, chars, length, filename, lineno);
cx->free_(chars);
return script;
}
JS_PUBLIC_API(JSScript *)
JS_CompileScript(JSContext *cx, JSObject *obj, const char *bytes, size_t length,
const char *filename, unsigned lineno)
{
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
return JS_CompileScriptForPrincipals(cx, obj, NULL, bytes, length, filename, lineno);
}
JS_PUBLIC_API(JSBool)
JS_BufferIsCompilableUnit(JSContext *cx, JSBool bytes_are_utf8, JSObject *obj_, const char *bytes, size_t length)
{
RootedObject obj(cx, obj_);
jschar *chars;
JSBool result;
JSExceptionState *exnState;
JSErrorReporter older;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
if (bytes_are_utf8)
chars = InflateString(cx, bytes, &length, CESU8Encoding);
else
chars = InflateString(cx, bytes, &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);
{
Parser parser(cx, /* prin = */ NULL, /* originPrin = */ NULL,
chars, length, /* filename = */ NULL, /* lineno = */ 1, cx->findVersion(),
/* foldConstants = */ true, /* compileAndGo = */ false);
if (parser.init()) {
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);
}
}
cx->free_(chars);
JS_RestoreExceptionState(cx, exnState);
return result;
}
/* 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
static JSScript *
CompileUTF8FileHelper(JSContext *cx, JSObject *obj_, JSPrincipals *principals,
const char* filename, FILE *fp)
{
RootedObject obj(cx, obj_);
struct stat st;
int ok = fstat(fileno(fp), &st);
if (ok != 0)
return NULL;
char *buf = NULL;
size_t len = st.st_size;
size_t i = 0;
JSScript *script;
/* Read in the whole file, then compile it. */
if (fp == stdin) {
if (len == 0)
len = 8; /* start with a small buffer, expand as necessary */
int c;
bool hitEOF = false;
while (!hitEOF) {
len *= 2;
char* tmpbuf = (char *) cx->realloc_(buf, len * sizeof(char));
if (!tmpbuf) {
cx->free_(buf);
return NULL;
}
buf = tmpbuf;
while (i < len) {
c = fast_getc(fp);
if (c == EOF) {
hitEOF = true;
break;
}
buf[i++] = c;
}
}
} else {
buf = (char *) cx->malloc_(len * sizeof(char));
if (!buf)
return NULL;
int c;
// The |i < len| is necessary for files that lie about their length,
// e.g. /dev/zero and /dev/random. See bug 669434.
while (i < len && (c = fast_getc(fp)) != EOF)
buf[i++] = c;
}
JS_ASSERT(i <= len);
len = i;
size_t decodelen = len;
jschar *decodebuf = (jschar *)cx->malloc_(decodelen * sizeof(jschar));
if (JS_DecodeUTF8(cx, buf, len, decodebuf, &decodelen)) {
bool compileAndGo = cx->hasRunOption(JSOPTION_COMPILE_N_GO);
bool noScriptRval = cx->hasRunOption(JSOPTION_NO_SCRIPT_RVAL);
script = frontend::CompileScript(cx, obj, NULL, principals, NULL,
compileAndGo, noScriptRval, decodebuf, decodelen,
filename, 1, cx->findVersion());
} else {
script = NULL;
}
cx->free_(buf);
cx->free_(decodebuf);
return script;
}
JS_PUBLIC_API(JSScript *)
JS_CompileUTF8File(JSContext *cx, JSObject *obj_, const char *filename)
{
RootedObject obj(cx, obj_);
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
AutoLastFrameCheck lfc(cx);
FILE *fp;
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 NULL;
}
}
JSScript *script = CompileUTF8FileHelper(cx, obj, NULL, filename, fp);
if (fp != stdin)
fclose(fp);
return script;
}
JS_PUBLIC_API(JSScript *)
JS_CompileUTF8FileHandleForPrincipals(JSContext *cx, JSObject *obj, const char *filename,
FILE *file, JSPrincipals *principals)
{
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, principals);
AutoLastFrameCheck lfc(cx);
return CompileUTF8FileHelper(cx, obj, principals, filename, file);
}
JS_PUBLIC_API(JSScript *)
JS_CompileUTF8FileHandleForPrincipalsVersion(JSContext *cx, JSObject *obj, const char *filename,
FILE *file, JSPrincipals *principals, JSVersion version)
{
AutoVersionAPI ava(cx, version);
return JS_CompileUTF8FileHandleForPrincipals(cx, obj, filename, file, principals);
}
JS_PUBLIC_API(JSScript *)
JS_CompileUTF8FileHandle(JSContext *cx, JSObject *obj, const char *filename, FILE *file)
{
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
return JS_CompileUTF8FileHandleForPrincipals(cx, obj, filename, file, NULL);
}
JS_PUBLIC_API(JSObject *)
JS_GetGlobalFromScript(JSScript *script)
{
JS_ASSERT(!script->isCachedEval);
return &script->global();
}
static JSFunction *
CompileUCFunctionForPrincipalsCommon(JSContext *cx, JSObject *obj_,
JSPrincipals *principals, const char *name,
unsigned nargs, const char **argnames,
const jschar *chars, size_t length,
const char *filename, unsigned lineno, JSVersion version)
{
RootedObject obj(cx, obj_);
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, principals);
AutoLastFrameCheck lfc(cx);
RootedAtom funAtom(cx);
if (name) {
funAtom = js_Atomize(cx, name, strlen(name));
if (!funAtom)
return NULL;
}
Bindings bindings;
for (unsigned i = 0; i < nargs; i++) {
uint16_t dummy;
RootedAtom argAtom(cx, js_Atomize(cx, argnames[i], strlen(argnames[i])));
if (!argAtom || !bindings.addArgument(cx, argAtom, &dummy))
return NULL;
}
RootedFunction fun(cx, js_NewFunction(cx, NULL, NULL, 0, JSFUN_INTERPRETED, obj, funAtom));
if (!fun)
return NULL;
if (!frontend::CompileFunctionBody(cx, fun, principals, NULL, &bindings,
chars, length, filename, lineno, version))
{
return NULL;
}
if (obj && funAtom) {
Rooted<jsid> id(cx, AtomToId(funAtom));
if (!obj->defineGeneric(cx, id, ObjectValue(*fun), NULL, NULL, JSPROP_ENUMERATE))
return NULL;
}
return fun;
}
JS_PUBLIC_API(JSFunction *)
JS_CompileUCFunctionForPrincipalsVersion(JSContext *cx, JSObject *obj,
JSPrincipals *principals, const char *name,
unsigned nargs, const char **argnames,
const jschar *chars, size_t length,
const char *filename, unsigned lineno,
JSVersion version)
{
AutoVersionAPI avi(cx, version);
return CompileUCFunctionForPrincipalsCommon(cx, obj, principals, name, nargs, argnames, chars,
length, filename, lineno, avi.version());
}
JS_PUBLIC_API(JSFunction *)
JS_CompileUCFunctionForPrincipals(JSContext *cx, JSObject *obj,
JSPrincipals *principals, const char *name,
unsigned nargs, const char **argnames,
const jschar *chars, size_t length,
const char *filename, unsigned lineno)
{
return CompileUCFunctionForPrincipalsCommon(cx, obj, principals, name, nargs, argnames, chars,
length, filename, lineno, cx->findVersion());
}
JS_PUBLIC_API(JSFunction *)
JS_CompileUCFunction(JSContext *cx, JSObject *obj, const char *name,
unsigned nargs, const char **argnames,
const jschar *chars, size_t length,
const char *filename, unsigned lineno)
{
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
return JS_CompileUCFunctionForPrincipals(cx, obj, NULL, name, nargs, argnames,
chars, length, filename, lineno);
}
JS_PUBLIC_API(JSFunction *)
JS_CompileFunctionForPrincipals(JSContext *cx, JSObject *obj_,
JSPrincipals *principals, const char *name,
unsigned nargs, const char **argnames,
const char *bytes, size_t length,
const char *filename, unsigned lineno)
{
RootedObject obj(cx, obj_);
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
jschar *chars = InflateString(cx, bytes, &length);
if (!chars)
return NULL;
JSFunction *fun = JS_CompileUCFunctionForPrincipals(cx, obj, principals, name,
nargs, argnames, chars, length,
filename, lineno);
cx->free_(chars);
return fun;
}
JS_PUBLIC_API(JSFunction *)
JS_CompileFunction(JSContext *cx, JSObject *obj, const char *name,
unsigned nargs, const char **argnames,
const char *bytes, size_t length,
const char *filename, unsigned lineno)
{
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
return JS_CompileFunctionForPrincipals(cx, obj, NULL, name, nargs, argnames, bytes, length,
filename, lineno);
}
JS_PUBLIC_API(JSString *)
JS_DecompileScript(JSContext *cx, JSScript *script, const char *name, unsigned indent)
{
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
JSPrinter *jp;
JSString *str;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
#ifdef DEBUG
if (cx->compartment != script->compartment())
CompartmentChecker::fail(cx->compartment, script->compartment());
#endif
jp = js_NewPrinter(cx, name, NULL,
indent & ~JS_DONT_PRETTY_PRINT,
!(indent & JS_DONT_PRETTY_PRINT),
false, false);
if (!jp)
return NULL;
if (js_DecompileScript(jp, script))
str = js_GetPrinterOutput(jp);
else
str = NULL;
js_DestroyPrinter(jp);
return str;
}
JS_PUBLIC_API(JSString *)
JS_DecompileFunction(JSContext *cx, JSFunction *fun, unsigned indent)
{
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, fun);
return js_DecompileToString(cx, "JS_DecompileFunction", fun,
indent & ~JS_DONT_PRETTY_PRINT,
!(indent & JS_DONT_PRETTY_PRINT),
false, false, js_DecompileFunction);
}
JS_PUBLIC_API(JSString *)
JS_DecompileFunctionBody(JSContext *cx, JSFunction *fun, unsigned indent)
{
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, fun);
return js_DecompileToString(cx, "JS_DecompileFunctionBody", fun,
indent & ~JS_DONT_PRETTY_PRINT,
!(indent & JS_DONT_PRETTY_PRINT),
false, false, js_DecompileFunctionBody);
}
JS_NEVER_INLINE JS_PUBLIC_API(JSBool)
JS_ExecuteScript(JSContext *cx, JSObject *obj, JSScript *scriptArg_, jsval *rval)
{
RootedScript scriptArg(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);
JS::Anchor<JSScript *> script(NULL);
/*
* 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 (scriptArg->compartment() != obj->compartment()) {
script = CloneScript(cx, NullPtr(), NullPtr(), scriptArg);
if (!script.get())
return false;
} else {
script = scriptArg;
}
return Execute(cx, script.get(), *obj, rval);
}
JS_PUBLIC_API(JSBool)
JS_ExecuteScriptVersion(JSContext *cx, JSObject *obj, JSScript *script, jsval *rval,
JSVersion version)
{
AutoVersionAPI ava(cx, version);
return JS_ExecuteScript(cx, obj, script, rval);
}
bool
EvaluateUCScriptForPrincipalsCommon(JSContext *cx, JSObject *obj_,
JSPrincipals *principals, JSPrincipals *originPrincipals,
const jschar *chars, unsigned length,
const char *filename, unsigned lineno,
jsval *rval, JSVersion compileVersion)
{
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
RootedObject obj(cx, obj_);
bool compileAndGo = true;
bool noScriptRval = !rval;
CHECK_REQUEST(cx);
AutoLastFrameCheck lfc(cx);
JSScript *script = frontend::CompileScript(cx, obj, NULL, principals, originPrincipals,
compileAndGo, noScriptRval, chars, length,
filename, lineno, compileVersion);
if (!script)
return false;
JS_ASSERT(script->getVersion() == compileVersion);
return Execute(cx, script, *obj, rval);
}
JS_PUBLIC_API(JSBool)
JS_EvaluateUCScriptForPrincipals(JSContext *cx, JSObject *obj,
JSPrincipals *principals,
const jschar *chars, unsigned length,
const char *filename, unsigned lineno,
jsval *rval)
{
return EvaluateUCScriptForPrincipalsCommon(cx, obj, principals, NULL, chars, length,
filename, lineno, rval, cx->findVersion());
}
JS_PUBLIC_API(JSBool)
JS_EvaluateUCScriptForPrincipalsVersion(JSContext *cx, JSObject *obj,
JSPrincipals *principals,
const jschar *chars, unsigned length,
const char *filename, unsigned lineno,
jsval *rval, JSVersion version)
{
AutoVersionAPI avi(cx, version);
return EvaluateUCScriptForPrincipalsCommon(cx, obj, principals, NULL, chars, length,
filename, lineno, rval, avi.version());
}
extern JS_PUBLIC_API(JSBool)
JS_EvaluateUCScriptForPrincipalsVersionOrigin(JSContext *cx, JSObject *obj,
JSPrincipals *principals,
JSPrincipals *originPrincipals,
const jschar *chars, unsigned length,
const char *filename, unsigned lineno,
jsval *rval, JSVersion version)
{
AutoVersionAPI avi(cx, version);
return EvaluateUCScriptForPrincipalsCommon(cx, obj, principals, originPrincipals,
chars, length, filename, lineno, rval,
avi.version());
}
JS_PUBLIC_API(JSBool)
JS_EvaluateUCScript(JSContext *cx, JSObject *obj, const jschar *chars, unsigned length,
const char *filename, unsigned lineno, jsval *rval)
{
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
return JS_EvaluateUCScriptForPrincipals(cx, obj, NULL, chars, length, filename, lineno, rval);
}
/* Ancient unsigned nbytes is part of API/ABI, so use size_t length local. */
JS_PUBLIC_API(JSBool)
JS_EvaluateScriptForPrincipals(JSContext *cx, JSObject *obj_, JSPrincipals *principals,
const char *bytes, unsigned nbytes,
const char *filename, unsigned lineno, jsval *rval)
{
RootedObject obj(cx, obj_);
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
size_t length = nbytes;
jschar *chars = InflateString(cx, bytes, &length);
if (!chars)
return JS_FALSE;
JSBool ok = JS_EvaluateUCScriptForPrincipals(cx, obj, principals, chars, length,
filename, lineno, rval);
cx->free_(chars);
return ok;
}
JS_PUBLIC_API(JSBool)
JS_EvaluateScriptForPrincipalsVersion(JSContext *cx, JSObject *obj, JSPrincipals *principals,
const char *bytes, unsigned nbytes,
const char *filename, unsigned lineno, jsval *rval, JSVersion version)
{
AutoVersionAPI avi(cx, version);
return JS_EvaluateScriptForPrincipals(cx, obj, principals, bytes, nbytes, filename, lineno,
rval);
}
JS_PUBLIC_API(JSBool)
JS_EvaluateScript(JSContext *cx, JSObject *obj, const char *bytes, unsigned nbytes,
const char *filename, unsigned lineno, jsval *rval)
{
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
return JS_EvaluateScriptForPrincipals(cx, obj, NULL, bytes, nbytes, filename, lineno, rval);
}
JS_PUBLIC_API(JSBool)
JS_CallFunction(JSContext *cx, JSObject *obj, JSFunction *fun, unsigned argc, jsval *argv,
jsval *rval)
{
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 *obj_, const char *name, unsigned argc, jsval *argv,
jsval *rval)
{
JS_THREADSAFE_ASSERT(cx->compartment != cx->runtime->atomsCompartment);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj_, JSValueArray(argv, argc));
AutoLastFrameCheck lfc(cx);
RootedObject obj(cx, obj_);
Value v;
JSAtom *atom = js_Atomize(cx, name, strlen(name));
if (!atom)
return false;
Rooted<jsid> id(cx, AtomToId(atom));
return GetMethod(cx, obj, id, 0, &v) &&
Invoke(cx, ObjectOrNullValue(obj), v, argc, argv, rval);
}
JS_PUBLIC_API(JSBool)
JS_CallFunctionValue(JSContext *cx, JSObject *obj, jsval fval, unsigned argc, jsval *argv,
jsval *rval)
{
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);
}
namespace JS {
JS_PUBLIC_API(bool)
Call(JSContext *cx, jsval thisv, jsval fval, unsigned argc, jsval *argv, jsval *rval)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, thisv, fval, JSValueArray(argv, argc));
AutoLastFrameCheck lfc(cx);
return Invoke(cx, thisv, fval, argc, argv, rval);
}
} // namespace JS
JS_PUBLIC_API(JSObject *)
JS_New(JSContext *cx, JSObject *ctor, unsigned argc, jsval *argv)
{
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.
InvokeArgsGuard args;
if (!cx->stack.pushInvokeArgs(cx, argc, &args))
return NULL;
args.calleev().setObject(*ctor);
args.thisv().setNull();
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)
{
rt->triggerOperationCallback();
}
JS_PUBLIC_API(JSBool)
JS_IsRunning(JSContext *cx)
{
StackFrame *fp = cx->maybefp();
while (fp && fp->isDummyFrame())
fp = fp->prev();
return fp != NULL;
}
JS_PUBLIC_API(JSBool)
JS_SaveFrameChain(JSContext *cx)
{
AssertHeapIsIdleOrIterating(cx);
CHECK_REQUEST(cx);
return cx->stack.saveFrameChain();
}
JS_PUBLIC_API(void)
JS_RestoreFrameChain(JSContext *cx)
{
AssertHeapIsIdleOrIterating(cx);
CHECK_REQUEST(cx);
cx->stack.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)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_NewStringCopyN(cx, s, n);
}
JS_PUBLIC_API(JSString *)
JS_NewStringCopyZ(JSContext *cx, const char *s)
{
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(cx, js, n);
if (!str)
cx->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)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSAtom *atom = js_AtomizeString(cx, str, InternAtom);
JS_ASSERT_IF(atom, JS_StringHasBeenInterned(cx, atom));
return atom;
}
JS_PUBLIC_API(JSString *)
JS_InternString(JSContext *cx, const char *s)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSAtom *atom = js_Atomize(cx, s, strlen(s), InternAtom);
JS_ASSERT_IF(atom, JS_StringHasBeenInterned(cx, atom));
return atom;
}
JS_PUBLIC_API(JSString *)
JS_NewUCString(JSContext *cx, jschar *chars, size_t length)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_NewString(cx, chars, length);
}
JS_PUBLIC_API(JSString *)
JS_NewUCStringCopyN(JSContext *cx, const jschar *s, size_t n)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_NewStringCopyN(cx, s, n);
}
JS_PUBLIC_API(JSString *)
JS_NewUCStringCopyZ(JSContext *cx, const jschar *s)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!s)
return cx->runtime->emptyString;
return js_NewStringCopyZ(cx, s);
}
JS_PUBLIC_API(JSString *)
JS_InternUCStringN(JSContext *cx, const jschar *s, size_t length)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSAtom *atom = js_AtomizeChars(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)
{
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)
{
AssertHeapIsIdleOrStringIsFlat(cx, str);
CHECK_REQUEST(cx);
assertSameCompartment(cx, str);
return str->getCharsZ(cx);
}
JS_PUBLIC_API(const jschar *)
JS_GetStringCharsZAndLength(JSContext *cx, JSString *str, size_t *plength)
{
AssertHeapIsIdleOrStringIsFlat(cx, str);
CHECK_REQUEST(cx);
assertSameCompartment(cx, str);
*plength = str->length();
return str->getCharsZ(cx);
}
JS_PUBLIC_API(const jschar *)
JS_GetStringCharsAndLength(JSContext *cx, JSString *str, size_t *plength)
{
AssertHeapIsIdleOrStringIsFlat(cx, str);
CHECK_REQUEST(cx);
assertSameCompartment(cx, str);
*plength = str->length();
return str->getChars(cx);
}
JS_PUBLIC_API(const jschar *)
JS_GetInternedStringChars(JSString *str)
{
return str->asAtom().chars();
}
JS_PUBLIC_API(const jschar *)
JS_GetInternedStringCharsAndLength(JSString *str, size_t *plength)
{
JSAtom &atom = str->asAtom();
*plength = atom.length();
return atom.chars();
}
extern JS_PUBLIC_API(JSFlatString *)
JS_FlattenString(JSContext *cx, JSString *str)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, str);
return str->getCharsZ(cx) ? (JSFlatString *)str : NULL;
}
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)
{
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)
{
JSLinearString *linearStr = str->ensureLinear(NULL);
return linearStr && FileEscapedString(fp, linearStr, quote);
}
JS_PUBLIC_API(JSString *)
JS_NewGrowableString(JSContext *cx, jschar *chars, size_t length)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_NewString(cx, chars, length);
}
JS_PUBLIC_API(JSString *)
JS_NewDependentString(JSContext *cx, JSString *str, size_t start, size_t length)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_NewDependentString(cx, str, start, length);
}
JS_PUBLIC_API(JSString *)
JS_ConcatStrings(JSContext *cx, JSString *left, JSString *right)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
Rooted<JSString*> lstr(cx, left);
Rooted<JSString*> rstr(cx, right);
return js_ConcatStrings(cx, lstr, rstr);
}
JS_PUBLIC_API(const jschar *)
JS_UndependString(JSContext *cx, JSString *str)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return str->getCharsZ(cx);
}
JS_PUBLIC_API(JSBool)
JS_MakeStringImmutable(JSContext *cx, JSString *str)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return !!str->ensureFixed(cx);
}
JS_PUBLIC_API(JSBool)
JS_EncodeCharacters(JSContext *cx, const jschar *src, size_t srclen, char *dst, size_t *dstlenp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
size_t n;
if (!dst) {
n = GetDeflatedStringLength(cx, src, srclen);
if (n == (size_t)-1) {
*dstlenp = 0;
return JS_FALSE;
}
*dstlenp = n;
return JS_TRUE;
}
return DeflateStringToBuffer(cx, src, srclen, dst, dstlenp);
}
JS_PUBLIC_API(JSBool)
JS_DecodeBytes(JSContext *cx, const char *src, size_t srclen, jschar *dst, size_t *dstlenp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return InflateStringToBuffer(cx, src, srclen, dst, dstlenp);
}
JS_PUBLIC_API(JSBool)
JS_DecodeUTF8(JSContext *cx, const char *src, size_t srclen, jschar *dst,
size_t *dstlenp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return InflateUTF8StringToBuffer(cx, src, srclen, dst, dstlenp);
}
JS_PUBLIC_API(char *)
JS_EncodeString(JSContext *cx, JSString *str)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
const jschar *chars = str->getChars(cx);
if (!chars)
return NULL;
return DeflateString(cx, chars, str->length());
}
JS_PUBLIC_API(size_t)
JS_GetStringEncodingLength(JSContext *cx, JSString *str)
{
/* jsd calls us with a NULL cx. Ugh. */
if (cx) {
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
}
const jschar *chars = str->getChars(cx);
if (!chars)
return size_t(-1);
return GetDeflatedStringLength(cx, chars, str->length());
}
JS_PUBLIC_API(size_t)
JS_EncodeStringToBuffer(JSString *str, char *buffer, size_t length)
{
/*
* 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 = GetDeflatedStringLength(NULL, chars, str->length());
if (necessaryLength == size_t(-1))
return size_t(-1);
if (writtenLength != length) {
/* Make sure that the buffer contains only valid UTF-8 sequences. */
JS_ASSERT(js_CStringsAreUTF8);
PodZero(buffer + writtenLength, length - writtenLength);
}
return necessaryLength;
}
JS_PUBLIC_API(JSBool)
JS_Stringify(JSContext *cx, jsval *vp, JSObject *replacer, jsval space,
JSONWriteCallback callback, void *data)
{
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()) {
JSAtom *nullAtom = cx->runtime->atomState.nullAtom;
return callback(nullAtom->chars(), nullAtom->length(), data);
}
return callback(sb.begin(), sb.length(), data);
}
JS_PUBLIC_API(JSBool)
JS_ParseJSON(JSContext *cx, const jschar *chars, uint32_t len, jsval *vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return ParseJSONWithReviver(cx, chars, len, NullValue(), vp);
}
JS_PUBLIC_API(JSBool)
JS_ParseJSONWithReviver(JSContext *cx, const jschar *chars, uint32_t len, jsval reviver, jsval *vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return ParseJSONWithReviver(cx, chars, len, reviver, vp);
}
JS_PUBLIC_API(JSBool)
JS_ReadStructuredClone(JSContext *cx, const uint64_t *buf, size_t nbytes,
uint32_t version, jsval *vp,
const JSStructuredCloneCallbacks *optionalCallbacks,
void *closure)
{
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 v, uint64_t **bufp, size_t *nbytesp,
const JSStructuredCloneCallbacks *optionalCallbacks,
void *closure)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v);
const JSStructuredCloneCallbacks *callbacks =
optionalCallbacks ?
optionalCallbacks :
cx->runtime->structuredCloneCallbacks;
return WriteStructuredClone(cx, v, (uint64_t **) bufp, nbytesp, callbacks, closure);
}
JS_PUBLIC_API(JSBool)
JS_StructuredClone(JSContext *cx, jsval v, jsval *vp,
const JSStructuredCloneCallbacks *optionalCallbacks,
void *closure)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v);
const JSStructuredCloneCallbacks *callbacks =
optionalCallbacks ?
optionalCallbacks :
cx->runtime->structuredCloneCallbacks;
JSAutoStructuredCloneBuffer buf;
return buf.write(cx, v, callbacks, closure) &&
buf.read(cx, vp, callbacks, closure);
}
void
JSAutoStructuredCloneBuffer::clear()
{
if (data_) {
Foreground::free_(data_);
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)
{
uint64_t *newData = static_cast<uint64_t *>(OffTheBooks::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) const
{
JS_ASSERT(cx);
JS_ASSERT(data_);
return !!JS_ReadStructuredClone(cx, data_, nbytes_, version_, vp,
optionalCallbacks, closure);
}
bool
JSAutoStructuredCloneBuffer::write(JSContext *cx, jsval v,
const JSStructuredCloneCallbacks *optionalCallbacks,
void *closure)
{
clear();
bool ok = !!JS_WriteStructuredClone(cx, v, &data_, &nbytes_,
optionalCallbacks, closure);
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);
}
/*
* The following determines whether C Strings are to be treated as UTF-8
* or ISO-8859-1. For correct operation, it must be set prior to the
* first call to JS_NewRuntime.
*/
#ifndef JS_C_STRINGS_ARE_UTF8
JSBool js_CStringsAreUTF8 = JS_FALSE;
#endif
JS_PUBLIC_API(JSBool)
JS_CStringsAreUTF8()
{
return js_CStringsAreUTF8;
}
JS_PUBLIC_API(void)
JS_SetCStringsAreUTF8()
{
JS_ASSERT(!js_NewRuntimeWasCalled);
#ifndef JS_C_STRINGS_ARE_UTF8
js_CStringsAreUTF8 = JS_TRUE;
#endif
}
/************************************************************************/
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, JS_TRUE, 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, JS_FALSE, ap);
va_end(ap);
}
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, JS_TRUE, 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, JS_FALSE, 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)
{
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)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_NewDateObjectMsec(cx, msec);
}
JS_PUBLIC_API(JSBool)
JS_ObjectIsDate(JSContext *cx, JSObject *obj)
{
AssertHeapIsIdle(cx);
JS_ASSERT(obj);
return obj->isDate();
}
JS_PUBLIC_API(void)
JS_ClearDateCaches(JSContext *cx)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
js_ClearDateCaches();
}
/************************************************************************/
/*
* Regular Expressions.
*/
JS_PUBLIC_API(JSObject *)
JS_NewRegExpObject(JSContext *cx, JSObject *obj_, char *bytes, size_t length, unsigned flags)
{
RootedObject obj(cx, obj_);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
jschar *chars = InflateString(cx, bytes, &length);
if (!chars)
return NULL;
RegExpStatics *res = obj->asGlobal().getRegExpStatics();
RegExpObject *reobj = RegExpObject::create(cx, res, chars, length, RegExpFlag(flags), NULL);
cx->free_(chars);
return reobj;
}
JS_PUBLIC_API(JSObject *)
JS_NewUCRegExpObject(JSContext *cx, JSObject *obj, jschar *chars, size_t length, unsigned flags)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RegExpStatics *res = obj->asGlobal().getRegExpStatics();
return RegExpObject::create(cx, res, chars, length, RegExpFlag(flags), NULL);
}
JS_PUBLIC_API(void)
JS_SetRegExpInput(JSContext *cx, JSObject *obj, JSString *input, JSBool multiline)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, input);
obj->asGlobal().getRegExpStatics()->reset(cx, input, !!multiline);
}
JS_PUBLIC_API(void)
JS_ClearRegExpStatics(JSContext *cx, JSObject *obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JS_ASSERT(obj);
obj->asGlobal().getRegExpStatics()->clear();
}
JS_PUBLIC_API(JSBool)
JS_ExecuteRegExp(JSContext *cx, JSObject *obj, JSObject *reobj, jschar *chars, size_t length,
size_t *indexp, JSBool test, jsval *rval)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RegExpStatics *res = obj->asGlobal().getRegExpStatics();
return ExecuteRegExp(cx, res, reobj->asRegExp(), NULL, chars, length,
indexp, test ? RegExpTest : RegExpExec, rval);
}
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);
cx->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 *obj, jschar *chars, size_t length,
size_t *indexp, JSBool test, jsval *rval)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return ExecuteRegExp(cx, NULL, obj->asRegExp(), NULL, chars, length, indexp,
test ? RegExpTest : RegExpExec, rval);
}
JS_PUBLIC_API(JSBool)
JS_ObjectIsRegExp(JSContext *cx, JSObject *obj)
{
AssertHeapIsIdle(cx);
JS_ASSERT(obj);
return obj->isRegExp();
}
JS_PUBLIC_API(unsigned)
JS_GetRegExpFlags(JSContext *cx, JSObject *obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return obj->asRegExp().getFlags();
}
JS_PUBLIC_API(JSString *)
JS_GetRegExpSource(JSContext *cx, JSObject *obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return obj->asRegExp().getSource();
}
/************************************************************************/
JS_PUBLIC_API(void)
JS_SetLocaleCallbacks(JSContext *cx, JSLocaleCallbacks *callbacks)
{
AssertHeapIsIdle(cx);
cx->localeCallbacks = callbacks;
}
JS_PUBLIC_API(JSLocaleCallbacks *)
JS_GetLocaleCallbacks(JSContext *cx)
{
/* This function can be called by a finalizer. */
return cx->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 v)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v);
cx->setPendingException(v);
}
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 {
JSBool throwing;
jsval exception;
};
JS_PUBLIC_API(JSExceptionState *)
JS_SaveExceptionState(JSContext *cx)
{
JSExceptionState *state;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
state = (JSExceptionState *) cx->malloc_(sizeof(JSExceptionState));
if (state) {
state->throwing = JS_GetPendingException(cx, &state->exception);
if (state->throwing && JSVAL_IS_GCTHING(state->exception))
js_AddRoot(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);
}
cx->free_(state);
}
}
JS_PUBLIC_API(JSErrorReport *)
JS_ErrorFromException(JSContext *cx, jsval v)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v);
return js_ErrorFromException(cx, v);
}
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)
{
#ifdef JS_THREADSAFE
if (!rt->onOwnerThread())
MOZ_CRASH();
#endif
}
#ifdef JS_GC_ZEAL
JS_PUBLIC_API(void)
JS_SetGCZeal(JSContext *cx, uint8_t zeal, uint32_t frequency)
{
const char *env = getenv("JS_GC_ZEAL");
if (env) {
if (0 == strcmp(env, "help")) {
printf("Format: JS_GC_ZEAL=N[,F]\n"
"N indicates \"zealousness\":\n"
" 0: no additional GCs\n"
" 1: additional GCs at common danger points\n"
" 2: GC every F allocations (default: 100)\n"
" 3: GC when the window paints (browser only)\n"
" 4: Verify write barriers between instructions\n"
" 5: Verify write barriers between paints\n"
" 6: Verify stack rooting (ignoring XML and Reflect)\n"
" 7: Verify stack rooting (all roots)\n"
" 8: Incremental GC in two slices: 1) mark roots 2) finish collection\n"
" 9: Incremental GC in two slices: 1) mark all 2) new marking and finish\n"
" 10: Incremental GC in multiple slices\n");
}
const char *p = strchr(env, ',');
zeal = atoi(env);
frequency = p ? atoi(p + 1) : JS_DEFAULT_ZEAL_FREQ;
}
if (zeal == 0 && cx->runtime->gcVerifyData)
VerifyBarriers(cx->runtime);
bool schedule = zeal >= js::gc::ZealAllocValue;
cx->runtime->gcZeal_ = zeal;
cx->runtime->gcZealFrequency = frequency;
cx->runtime->gcNextScheduled = schedule ? frequency : 0;
}
JS_PUBLIC_API(void)
JS_ScheduleGC(JSContext *cx, uint32_t count)
{
cx->runtime->gcNextScheduled = count;
}
#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 *id)
{
return IndexToId(cx, index, id);
}
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;
ScriptFrameIter 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
}
namespace JS {
AutoGCRooter::AutoGCRooter(JSContext *cx, ptrdiff_t tag)
: down(cx->runtime->autoGCRooters), tag(tag), stackTop(&cx->runtime->autoGCRooters)
{
JS_ASSERT(this != *stackTop);
*stackTop = this;
}
AutoEnumStateRooter::~AutoEnumStateRooter()
{
if (!stateValue.isNull())
MOZ_ALWAYS_TRUE(obj->enumerate(context, JSENUMERATE_DESTROY, &stateValue, 0));
}
#ifdef DEBUG
JS_PUBLIC_API(void)
AssertArgumentsAreSane(JSContext *cx, const JS::Value &v)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, v);
}
#endif /* DEBUG */
} // namespace JS
JS_PUBLIC_API(void *)
JS_EncodeScript(JSContext *cx, JSScript *script, uint32_t *lengthp)
{
XDREncoder encoder(cx);
if (!encoder.codeScript(&script))
return NULL;
return encoder.forgetData(lengthp);
}
JS_PUBLIC_API(void *)
JS_EncodeInterpretedFunction(JSContext *cx, JSObject *funobj, uint32_t *lengthp)
{
XDREncoder encoder(cx);
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)
{
XDRDecoder decoder(cx, data, length, principals, originPrincipals);
JSScript *script;
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)
{
XDRDecoder decoder(cx, data, length, principals, originPrincipals);
JSObject *funobj;
if (!decoder.codeFunction(&funobj))
return NULL;
return funobj;
}
JS_PUBLIC_API(JSObject *)
JS_GetScriptedGlobal(JSContext *cx)
{
ScriptFrameIter i(cx);
if (i.done())
return JS_GetGlobalForScopeChain(cx);
return JS_GetGlobalForFrame(Jsvalify(i.fp()));
}
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