jsapi.cpp
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sts=4 et sw=4 tw=99:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
* JavaScript API.
*/
#include "jsapi.h"
#include "mozilla/FloatingPoint.h"
#include "mozilla/PodOperations.h"
#include <ctype.h>
#include <stdarg.h>
#include <string.h>
#include <sys/stat.h>
#include "jsarray.h"
#include "jsatom.h"
#include "jsbool.h"
#include "jscntxt.h"
#include "jsdate.h"
#include "jsexn.h"
#include "jsfriendapi.h"
#include "jsfun.h"
#include "jsgc.h"
#include "jsiter.h"
#include "jslock.h"
#include "jsmath.h"
#include "jsnum.h"
#include "jsobj.h"
#include "json.h"
#include "jsprf.h"
#include "jsscript.h"
#include "jsstr.h"
#include "jstypes.h"
#include "jsutil.h"
#include "jswatchpoint.h"
#include "jsweakmap.h"
#include "jswrapper.h"
#include "asmjs/AsmJS.h"
#include "builtin/AtomicsObject.h"
#include "builtin/Eval.h"
#include "builtin/Intl.h"
#include "builtin/MapObject.h"
#include "builtin/Promise.h"
#include "builtin/RegExp.h"
#include "builtin/SymbolObject.h"
#ifdef ENABLE_SIMD
# include "builtin/SIMD.h"
#endif
#ifdef ENABLE_BINARYDATA
# include "builtin/TypedObject.h"
#endif
#include "frontend/BytecodeCompiler.h"
#include "frontend/FullParseHandler.h" // for JS_BufferIsCompileableUnit
#include "frontend/Parser.h" // for JS_BufferIsCompileableUnit
#include "gc/Marking.h"
#include "gc/Policy.h"
#include "jit/JitCommon.h"
#include "js/CharacterEncoding.h"
#include "js/Conversions.h"
#include "js/Date.h"
#include "js/Initialization.h"
#include "js/Proxy.h"
#include "js/SliceBudget.h"
#include "js/StructuredClone.h"
#include "js/UniquePtr.h"
#include "vm/DateObject.h"
#include "vm/Debugger.h"
#include "vm/ErrorObject.h"
#include "vm/HelperThreads.h"
#include "vm/Interpreter.h"
#include "vm/RegExpStatics.h"
#include "vm/Runtime.h"
#include "vm/SavedStacks.h"
#include "vm/ScopeObject.h"
#include "vm/SelfHosting.h"
#include "vm/Shape.h"
#include "vm/StopIterationObject.h"
#include "vm/StringBuffer.h"
#include "vm/Symbol.h"
#include "vm/TypedArrayCommon.h"
#include "vm/WrapperObject.h"
#include "vm/Xdr.h"
#include "jsatominlines.h"
#include "jsfuninlines.h"
#include "jsscriptinlines.h"
#include "vm/Interpreter-inl.h"
#include "vm/NativeObject-inl.h"
#include "vm/SavedStacks-inl.h"
#include "vm/String-inl.h"
using namespace js;
using namespace js::gc;
using mozilla::Maybe;
using mozilla::PodCopy;
using mozilla::PodZero;
using JS::AutoGCRooter;
using JS::ToInt32;
using JS::ToInteger;
using JS::ToUint32;
using js::frontend::Parser;
#ifdef HAVE_VA_LIST_AS_ARRAY
#define JS_ADDRESSOF_VA_LIST(ap) ((va_list*)(ap))
#else
#define JS_ADDRESSOF_VA_LIST(ap) (&(ap))
#endif
bool
JS::CallArgs::requireAtLeast(JSContext* cx, const char* fnname, unsigned required) const
{
if (length() < required) {
char numArgsStr[40];
JS_snprintf(numArgsStr, sizeof numArgsStr, "%u", required - 1);
JS_ReportErrorNumber(cx, GetErrorMessage, nullptr, JSMSG_MORE_ARGS_NEEDED,
fnname, numArgsStr, required == 2 ? "" : "s");
return false;
}
return true;
}
static bool
ErrorTakesArguments(unsigned msg)
{
MOZ_ASSERT(msg < JSErr_Limit);
unsigned argCount = js_ErrorFormatString[msg].argCount;
MOZ_ASSERT(argCount <= 2);
return argCount == 1 || argCount == 2;
}
static bool
ErrorTakesObjectArgument(unsigned msg)
{
MOZ_ASSERT(msg < JSErr_Limit);
unsigned argCount = js_ErrorFormatString[msg].argCount;
MOZ_ASSERT(argCount <= 2);
return argCount == 2;
}
JS_PUBLIC_API(bool)
JS::ObjectOpResult::reportStrictErrorOrWarning(JSContext* cx, HandleObject obj, HandleId id,
bool strict)
{
static_assert(unsigned(OkCode) == unsigned(JSMSG_NOT_AN_ERROR),
"unsigned value of OkCode must not be an error code");
MOZ_ASSERT(code_ != Uninitialized);
MOZ_ASSERT(!ok());
unsigned flags = strict ? JSREPORT_ERROR : (JSREPORT_WARNING | JSREPORT_STRICT);
if (code_ == JSMSG_OBJECT_NOT_EXTENSIBLE || code_ == JSMSG_SET_NON_OBJECT_RECEIVER) {
RootedValue val(cx, ObjectValue(*obj));
return ReportValueErrorFlags(cx, flags, code_, JSDVG_IGNORE_STACK, val,
nullptr, nullptr, nullptr);
}
if (ErrorTakesArguments(code_)) {
RootedValue idv(cx, IdToValue(id));
RootedString str(cx, ValueToSource(cx, idv));
if (!str)
return false;
JSAutoByteString propName(cx, str);
if (!propName)
return false;
if (ErrorTakesObjectArgument(code_)) {
return JS_ReportErrorFlagsAndNumber(cx, flags, GetErrorMessage, nullptr, code_,
obj->getClass()->name, propName.ptr());
}
return JS_ReportErrorFlagsAndNumber(cx, flags, GetErrorMessage, nullptr, code_,
propName.ptr());
}
return JS_ReportErrorFlagsAndNumber(cx, flags, GetErrorMessage, nullptr, code_);
}
JS_PUBLIC_API(bool)
JS::ObjectOpResult::reportStrictErrorOrWarning(JSContext* cx, HandleObject obj, bool strict)
{
MOZ_ASSERT(code_ != Uninitialized);
MOZ_ASSERT(!ok());
MOZ_ASSERT(!ErrorTakesArguments(code_));
unsigned flags = strict ? JSREPORT_ERROR : (JSREPORT_WARNING | JSREPORT_STRICT);
return JS_ReportErrorFlagsAndNumber(cx, flags, GetErrorMessage, nullptr, code_);
}
JS_PUBLIC_API(bool)
JS::ObjectOpResult::failCantRedefineProp()
{
return fail(JSMSG_CANT_REDEFINE_PROP);
}
JS_PUBLIC_API(bool)
JS::ObjectOpResult::failReadOnly()
{
return fail(JSMSG_READ_ONLY);
}
JS_PUBLIC_API(bool)
JS::ObjectOpResult::failGetterOnly()
{
return fail(JSMSG_GETTER_ONLY);
}
JS_PUBLIC_API(bool)
JS::ObjectOpResult::failCantDelete()
{
return fail(JSMSG_CANT_DELETE);
}
JS_PUBLIC_API(bool)
JS::ObjectOpResult::failCantSetInterposed()
{
return fail(JSMSG_CANT_SET_INTERPOSED);
}
JS_PUBLIC_API(bool)
JS::ObjectOpResult::failCantDefineWindowElement()
{
return fail(JSMSG_CANT_DEFINE_WINDOW_ELEMENT);
}
JS_PUBLIC_API(bool)
JS::ObjectOpResult::failCantDeleteWindowElement()
{
return fail(JSMSG_CANT_DELETE_WINDOW_ELEMENT);
}
JS_PUBLIC_API(bool)
JS::ObjectOpResult::failCantDeleteWindowNamedProperty()
{
return fail(JSMSG_CANT_DELETE_WINDOW_NAMED_PROPERTY);
}
JS_PUBLIC_API(bool)
JS::ObjectOpResult::failCantPreventExtensions()
{
return fail(JSMSG_CANT_PREVENT_EXTENSIONS);
}
JS_PUBLIC_API(bool)
JS::ObjectOpResult::failCantSetProto()
{
return fail(JSMSG_CANT_SET_PROTO);
}
JS_PUBLIC_API(bool)
JS::ObjectOpResult::failNoNamedSetter()
{
return fail(JSMSG_NO_NAMED_SETTER);
}
JS_PUBLIC_API(bool)
JS::ObjectOpResult::failNoIndexedSetter()
{
return fail(JSMSG_NO_INDEXED_SETTER);
}
JS_PUBLIC_API(int64_t)
JS_Now()
{
return PRMJ_Now();
}
JS_PUBLIC_API(Value)
JS_GetNaNValue(JSContext* cx)
{
return cx->runtime()->NaNValue;
}
JS_PUBLIC_API(Value)
JS_GetNegativeInfinityValue(JSContext* cx)
{
return cx->runtime()->negativeInfinityValue;
}
JS_PUBLIC_API(Value)
JS_GetPositiveInfinityValue(JSContext* cx)
{
return cx->runtime()->positiveInfinityValue;
}
JS_PUBLIC_API(Value)
JS_GetEmptyStringValue(JSContext* cx)
{
return StringValue(cx->runtime()->emptyString);
}
JS_PUBLIC_API(JSString*)
JS_GetEmptyString(JSRuntime* rt)
{
MOZ_ASSERT(rt->hasContexts());
return rt->emptyString;
}
namespace js {
void
AssertHeapIsIdle(JSRuntime* rt)
{
MOZ_ASSERT(!rt->isHeapBusy());
}
void
AssertHeapIsIdle(JSContext* cx)
{
AssertHeapIsIdle(cx->runtime());
}
} // namespace js
static void
AssertHeapIsIdleOrIterating(JSRuntime* rt)
{
MOZ_ASSERT(!rt->isHeapCollecting());
}
static void
AssertHeapIsIdleOrIterating(JSContext* cx)
{
AssertHeapIsIdleOrIterating(cx->runtime());
}
static void
AssertHeapIsIdleOrStringIsFlat(JSContext* cx, JSString* str)
{
/*
* We allow some functions to be called during a GC as long as the argument
* is a flat string, since that will not cause allocation.
*/
MOZ_ASSERT_IF(cx->runtime()->isHeapBusy(), str->isFlat());
}
JS_PUBLIC_API(bool)
JS_ValueToObject(JSContext* cx, HandleValue value, MutableHandleObject objp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
if (value.isNullOrUndefined()) {
objp.set(nullptr);
return true;
}
JSObject* obj = ToObject(cx, value);
if (!obj)
return false;
objp.set(obj);
return true;
}
JS_PUBLIC_API(JSFunction*)
JS_ValueToFunction(JSContext* cx, HandleValue value)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
return ReportIfNotFunction(cx, value);
}
JS_PUBLIC_API(JSFunction*)
JS_ValueToConstructor(JSContext* cx, HandleValue value)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
return ReportIfNotFunction(cx, value);
}
JS_PUBLIC_API(JSString*)
JS_ValueToSource(JSContext* cx, HandleValue value)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
return ValueToSource(cx, value);
}
JS_PUBLIC_API(bool)
JS_DoubleIsInt32(double d, int32_t* ip)
{
return mozilla::NumberIsInt32(d, ip);
}
JS_PUBLIC_API(JSType)
JS_TypeOfValue(JSContext* cx, HandleValue value)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
return TypeOfValue(value);
}
JS_PUBLIC_API(bool)
JS_StrictlyEqual(JSContext* cx, HandleValue value1, HandleValue value2, bool* equal)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value1, value2);
MOZ_ASSERT(equal);
return StrictlyEqual(cx, value1, value2, equal);
}
JS_PUBLIC_API(bool)
JS_LooselyEqual(JSContext* cx, HandleValue value1, HandleValue value2, bool* equal)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value1, value2);
MOZ_ASSERT(equal);
return LooselyEqual(cx, value1, value2, equal);
}
JS_PUBLIC_API(bool)
JS_SameValue(JSContext* cx, HandleValue value1, HandleValue value2, bool* same)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value1, value2);
MOZ_ASSERT(same);
return SameValue(cx, value1, value2, same);
}
JS_PUBLIC_API(bool)
JS_IsBuiltinEvalFunction(JSFunction* fun)
{
return IsAnyBuiltinEval(fun);
}
JS_PUBLIC_API(bool)
JS_IsBuiltinFunctionConstructor(JSFunction* fun)
{
return fun->isBuiltinFunctionConstructor();
}
/************************************************************************/
#ifdef DEBUG
JS_FRIEND_API(bool)
JS::isGCEnabled()
{
return !TlsPerThreadData.get()->suppressGC;
}
#else
JS_FRIEND_API(bool) JS::isGCEnabled() { return true; }
#endif
JS_PUBLIC_API(JSRuntime*)
JS_NewRuntime(uint32_t maxbytes, uint32_t maxNurseryBytes, JSRuntime* parentRuntime)
{
MOZ_ASSERT(JS::detail::libraryInitState == JS::detail::InitState::Running,
"must call JS_Init prior to creating any JSRuntimes");
// Make sure that all parent runtimes are the topmost parent.
while (parentRuntime && parentRuntime->parentRuntime)
parentRuntime = parentRuntime->parentRuntime;
JSRuntime* rt = js_new<JSRuntime>(parentRuntime);
if (!rt)
return nullptr;
if (!rt->init(maxbytes, maxNurseryBytes)) {
JS_DestroyRuntime(rt);
return nullptr;
}
return rt;
}
JS_PUBLIC_API(void)
JS_DestroyRuntime(JSRuntime* rt)
{
js_delete(rt);
}
static JS_CurrentEmbedderTimeFunction currentEmbedderTimeFunction;
JS_PUBLIC_API(void)
JS_SetCurrentEmbedderTimeFunction(JS_CurrentEmbedderTimeFunction timeFn)
{
currentEmbedderTimeFunction = timeFn;
}
JS_PUBLIC_API(double)
JS_GetCurrentEmbedderTime()
{
if (currentEmbedderTimeFunction)
return currentEmbedderTimeFunction();
return PRMJ_Now() / static_cast<double>(PRMJ_USEC_PER_MSEC);
}
JS_PUBLIC_API(void*)
JS_GetRuntimePrivate(JSRuntime* rt)
{
return rt->data;
}
JS_PUBLIC_API(void)
JS_SetRuntimePrivate(JSRuntime* rt, void* data)
{
rt->data = data;
}
JS_PUBLIC_API(void)
JS_SetFutexCanWait(JSRuntime* rt)
{
rt->fx.setCanWait(true);
}
static void
StartRequest(JSContext* cx)
{
JSRuntime* rt = cx->runtime();
MOZ_ASSERT(CurrentThreadCanAccessRuntime(rt));
if (rt->requestDepth) {
rt->requestDepth++;
} else {
/* Indicate that a request is running. */
rt->requestDepth = 1;
rt->triggerActivityCallback(true);
}
}
static void
StopRequest(JSContext* cx)
{
JSRuntime* rt = cx->runtime();
MOZ_ASSERT(CurrentThreadCanAccessRuntime(rt));
MOZ_ASSERT(rt->requestDepth != 0);
if (rt->requestDepth != 1) {
rt->requestDepth--;
} else {
rt->requestDepth = 0;
rt->triggerActivityCallback(false);
}
}
JS_PUBLIC_API(void)
JS_BeginRequest(JSContext* cx)
{
cx->outstandingRequests++;
StartRequest(cx);
}
JS_PUBLIC_API(void)
JS_EndRequest(JSContext* cx)
{
MOZ_ASSERT(cx->outstandingRequests != 0);
cx->outstandingRequests--;
StopRequest(cx);
}
JS_PUBLIC_API(void)
JS_SetContextCallback(JSRuntime* rt, JSContextCallback cxCallback, void* data)
{
rt->cxCallback = cxCallback;
rt->cxCallbackData = data;
}
JS_PUBLIC_API(JSContext*)
JS_NewContext(JSRuntime* rt, size_t stackChunkSize)
{
return NewContext(rt, stackChunkSize);
}
JS_PUBLIC_API(void)
JS_DestroyContext(JSContext* cx)
{
MOZ_ASSERT(!cx->compartment());
DestroyContext(cx, DCM_FORCE_GC);
}
JS_PUBLIC_API(void)
JS_DestroyContextNoGC(JSContext* cx)
{
MOZ_ASSERT(!cx->compartment());
DestroyContext(cx, DCM_NO_GC);
}
JS_PUBLIC_API(void*)
JS_GetContextPrivate(JSContext* cx)
{
return cx->data;
}
JS_PUBLIC_API(void)
JS_SetContextPrivate(JSContext* cx, void* data)
{
cx->data = data;
}
JS_PUBLIC_API(void*)
JS_GetSecondContextPrivate(JSContext* cx)
{
return cx->data2;
}
JS_PUBLIC_API(void)
JS_SetSecondContextPrivate(JSContext* cx, void* data)
{
cx->data2 = data;
}
JS_PUBLIC_API(JSRuntime*)
JS_GetRuntime(JSContext* cx)
{
return cx->runtime();
}
JS_PUBLIC_API(JSRuntime*)
JS_GetParentRuntime(JSRuntime* rt)
{
return rt->parentRuntime ? rt->parentRuntime : rt;
}
JS_PUBLIC_API(JSContext*)
JS_ContextIterator(JSRuntime* rt, JSContext** iterp)
{
JSContext* cx = *iterp;
cx = cx ? cx->getNext() : rt->contextList.getFirst();
*iterp = cx;
return cx;
}
JS_PUBLIC_API(JSVersion)
JS_GetVersion(JSContext* cx)
{
return VersionNumber(cx->findVersion());
}
JS_PUBLIC_API(void)
JS_SetVersionForCompartment(JSCompartment* compartment, JSVersion version)
{
compartment->behaviors().setVersion(version);
}
static const struct v2smap {
JSVersion version;
const char* string;
} v2smap[] = {
{JSVERSION_ECMA_3, "ECMAv3"},
{JSVERSION_1_6, "1.6"},
{JSVERSION_1_7, "1.7"},
{JSVERSION_1_8, "1.8"},
{JSVERSION_ECMA_5, "ECMAv5"},
{JSVERSION_DEFAULT, js_default_str},
{JSVERSION_DEFAULT, "1.0"},
{JSVERSION_DEFAULT, "1.1"},
{JSVERSION_DEFAULT, "1.2"},
{JSVERSION_DEFAULT, "1.3"},
{JSVERSION_DEFAULT, "1.4"},
{JSVERSION_DEFAULT, "1.5"},
{JSVERSION_UNKNOWN, nullptr}, /* must be last, nullptr 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(JS::RuntimeOptions&)
JS::RuntimeOptionsRef(JSRuntime* rt)
{
return rt->options();
}
JS_PUBLIC_API(JS::RuntimeOptions&)
JS::RuntimeOptionsRef(JSContext* cx)
{
return cx->runtime()->options();
}
JS_PUBLIC_API(JS::ContextOptions&)
JS::ContextOptionsRef(JSContext* cx)
{
return cx->options();
}
JS_PUBLIC_API(const char*)
JS_GetImplementationVersion(void)
{
return "JavaScript-C" MOZILLA_VERSION;
}
JS_PUBLIC_API(void)
JS_SetDestroyCompartmentCallback(JSRuntime* rt, JSDestroyCompartmentCallback callback)
{
rt->destroyCompartmentCallback = callback;
}
JS_PUBLIC_API(void)
JS_SetSizeOfIncludingThisCompartmentCallback(JSRuntime* rt,
JSSizeOfIncludingThisCompartmentCallback callback)
{
rt->sizeOfIncludingThisCompartmentCallback = callback;
}
JS_PUBLIC_API(void)
JS_SetDestroyZoneCallback(JSRuntime* rt, JSZoneCallback callback)
{
rt->destroyZoneCallback = callback;
}
JS_PUBLIC_API(void)
JS_SetSweepZoneCallback(JSRuntime* rt, JSZoneCallback callback)
{
rt->sweepZoneCallback = callback;
}
JS_PUBLIC_API(void)
JS_SetCompartmentNameCallback(JSRuntime* rt, JSCompartmentNameCallback callback)
{
rt->compartmentNameCallback = callback;
}
JS_PUBLIC_API(void)
JS_SetWrapObjectCallbacks(JSRuntime* rt, const JSWrapObjectCallbacks* callbacks)
{
rt->wrapObjectCallbacks = callbacks;
}
JS_PUBLIC_API(JSCompartment*)
JS_EnterCompartment(JSContext* cx, JSObject* target)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSCompartment* oldCompartment = cx->compartment();
cx->enterCompartment(target->compartment());
return oldCompartment;
}
JS_PUBLIC_API(void)
JS_LeaveCompartment(JSContext* cx, JSCompartment* oldCompartment)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
cx->leaveCompartment(oldCompartment);
}
JSAutoCompartment::JSAutoCompartment(JSContext* cx, JSObject* target
MOZ_GUARD_OBJECT_NOTIFIER_PARAM_IN_IMPL)
: cx_(cx),
oldCompartment_(cx->compartment())
{
AssertHeapIsIdleOrIterating(cx_);
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
cx_->enterCompartment(target->compartment());
}
JSAutoCompartment::JSAutoCompartment(JSContext* cx, JSScript* target
MOZ_GUARD_OBJECT_NOTIFIER_PARAM_IN_IMPL)
: cx_(cx),
oldCompartment_(cx->compartment())
{
AssertHeapIsIdleOrIterating(cx_);
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
cx_->enterCompartment(target->compartment());
}
JSAutoCompartment::~JSAutoCompartment()
{
cx_->leaveCompartment(oldCompartment_);
}
JSAutoNullableCompartment::JSAutoNullableCompartment(JSContext* cx,
JSObject* targetOrNull
MOZ_GUARD_OBJECT_NOTIFIER_PARAM_IN_IMPL)
: cx_(cx),
oldCompartment_(cx->compartment())
{
AssertHeapIsIdleOrIterating(cx_);
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
if (targetOrNull) {
cx_->enterCompartment(targetOrNull->compartment());
} else {
cx_->enterNullCompartment();
}
}
JSAutoNullableCompartment::~JSAutoNullableCompartment()
{
cx_->leaveCompartment(oldCompartment_);
}
JS_PUBLIC_API(void)
JS_SetCompartmentPrivate(JSCompartment* compartment, void* data)
{
compartment->data = data;
}
JS_PUBLIC_API(void*)
JS_GetCompartmentPrivate(JSCompartment* compartment)
{
return compartment->data;
}
JS_PUBLIC_API(JSAddonId*)
JS::NewAddonId(JSContext* cx, HandleString str)
{
return static_cast<JSAddonId*>(JS_AtomizeAndPinJSString(cx, str));
}
JS_PUBLIC_API(JSString*)
JS::StringOfAddonId(JSAddonId* id)
{
return id;
}
JS_PUBLIC_API(JSAddonId*)
JS::AddonIdOfObject(JSObject* obj)
{
return obj->compartment()->creationOptions().addonIdOrNull();
}
JS_PUBLIC_API(void)
JS_SetZoneUserData(JS::Zone* zone, void* data)
{
zone->data = data;
}
JS_PUBLIC_API(void*)
JS_GetZoneUserData(JS::Zone* zone)
{
return zone->data;
}
JS_PUBLIC_API(bool)
JS_WrapObject(JSContext* cx, MutableHandleObject objp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (objp)
JS::ExposeObjectToActiveJS(objp);
return cx->compartment()->wrap(cx, objp);
}
JS_PUBLIC_API(bool)
JS_WrapValue(JSContext* cx, MutableHandleValue vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JS::ExposeValueToActiveJS(vp);
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.
*
* We don't have a good way to recover from failure in this function, so
* we intentionally crash instead.
*/
JS_PUBLIC_API(JSObject*)
JS_TransplantObject(JSContext* cx, HandleObject origobj, HandleObject target)
{
AssertHeapIsIdle(cx);
MOZ_ASSERT(origobj != target);
MOZ_ASSERT(!origobj->is<CrossCompartmentWrapperObject>());
MOZ_ASSERT(!target->is<CrossCompartmentWrapperObject>());
RootedValue origv(cx, ObjectValue(*origobj));
RootedObject newIdentity(cx);
// Don't allow a compacting GC to observe any intermediate state.
AutoDisableCompactingGC nocgc(cx->runtime());
AutoDisableProxyCheck adpc(cx->runtime());
JSCompartment* destination = target->compartment();
if (origobj->compartment() == destination) {
// If the original object is in the same compartment as the
// destination, then we know that we won't find a wrapper in the
// destination's cross compartment map and that the same
// object will continue to work.
if (!JSObject::swap(cx, origobj, target))
MOZ_CRASH();
newIdentity = origobj;
} else if (WrapperMap::Ptr p = destination->lookupWrapper(origv)) {
// There might already be a wrapper for the original object in
// the new compartment. If there is, we use its identity and swap
// in the contents of |target|.
newIdentity = &p->value().get().toObject();
// When we remove origv from the wrapper map, its wrapper, newIdentity,
// must immediately cease to be a cross-compartment wrapper. Nuke it.
destination->removeWrapper(p);
NukeCrossCompartmentWrapper(cx, newIdentity);
if (!JSObject::swap(cx, newIdentity, target))
MOZ_CRASH();
} else {
// Otherwise, we use |target| for the new identity object.
newIdentity = target;
}
// Now, iterate through other scopes looking for references to the
// old object, and update the relevant cross-compartment wrappers.
if (!RemapAllWrappersForObject(cx, origobj, newIdentity))
MOZ_CRASH();
// Lastly, update the original object to point to the new one.
if (origobj->compartment() != destination) {
RootedObject newIdentityWrapper(cx, newIdentity);
AutoCompartment ac(cx, origobj);
if (!JS_WrapObject(cx, &newIdentityWrapper))
MOZ_CRASH();
MOZ_ASSERT(Wrapper::wrappedObject(newIdentityWrapper) == newIdentity);
if (!JSObject::swap(cx, origobj, newIdentityWrapper))
MOZ_CRASH();
if (!origobj->compartment()->putWrapper(cx, CrossCompartmentKey(newIdentity), origv))
MOZ_CRASH();
}
// The new identity object might be one of several things. Return it to avoid
// ambiguity.
return newIdentity;
}
/*
* Recompute all cross-compartment wrappers for an object, resetting state.
* Gecko uses this to clear Xray wrappers when doing a navigation that reuses
* the inner window and global object.
*/
JS_PUBLIC_API(bool)
JS_RefreshCrossCompartmentWrappers(JSContext* cx, HandleObject obj)
{
return RemapAllWrappersForObject(cx, obj, obj);
}
JS_PUBLIC_API(bool)
JS_InitStandardClasses(JSContext* cx, HandleObject obj)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
Rooted<GlobalObject*> global(cx, &obj->global());
return GlobalObject::initStandardClasses(cx, global);
}
#define EAGER_ATOM(name) NAME_OFFSET(name)
typedef struct JSStdName {
size_t atomOffset; /* offset of atom pointer in JSAtomState */
JSProtoKey key;
bool isDummy() const { return key == JSProto_Null; }
bool isSentinel() const { return key == JSProto_LIMIT; }
} JSStdName;
static const JSStdName*
LookupStdName(const JSAtomState& names, JSAtom* name, const JSStdName* table)
{
for (unsigned i = 0; !table[i].isSentinel(); i++) {
if (table[i].isDummy())
continue;
JSAtom* atom = AtomStateOffsetToName(names, table[i].atomOffset);
MOZ_ASSERT(atom);
if (name == atom)
return &table[i];
}
return nullptr;
}
/*
* Table of standard classes, indexed by JSProtoKey. For entries where the
* JSProtoKey does not correspond to a class with a meaningful constructor, we
* insert a null entry into the table.
*/
#define STD_NAME_ENTRY(name, code, init, clasp) { EAGER_ATOM(name), static_cast<JSProtoKey>(code) },
#define STD_DUMMY_ENTRY(name, code, init, dummy) { 0, JSProto_Null },
static const JSStdName standard_class_names[] = {
JS_FOR_PROTOTYPES(STD_NAME_ENTRY, STD_DUMMY_ENTRY)
{ 0, JSProto_LIMIT }
};
/*
* Table of top-level function and constant names and the JSProtoKey of the
* standard class that initializes them.
*/
static const JSStdName builtin_property_names[] = {
{ EAGER_ATOM(eval), JSProto_Object },
/* Global properties and functions defined by the Number class. */
{ EAGER_ATOM(NaN), JSProto_Number },
{ EAGER_ATOM(Infinity), JSProto_Number },
{ EAGER_ATOM(isNaN), JSProto_Number },
{ EAGER_ATOM(isFinite), JSProto_Number },
{ EAGER_ATOM(parseFloat), JSProto_Number },
{ EAGER_ATOM(parseInt), JSProto_Number },
/* String global functions. */
{ EAGER_ATOM(escape), JSProto_String },
{ EAGER_ATOM(unescape), JSProto_String },
{ EAGER_ATOM(decodeURI), JSProto_String },
{ EAGER_ATOM(encodeURI), JSProto_String },
{ EAGER_ATOM(decodeURIComponent), JSProto_String },
{ EAGER_ATOM(encodeURIComponent), JSProto_String },
#if JS_HAS_UNEVAL
{ EAGER_ATOM(uneval), JSProto_String },
#endif
{ 0, JSProto_LIMIT }
};
#undef EAGER_ATOM
JS_PUBLIC_API(bool)
JS_ResolveStandardClass(JSContext* cx, HandleObject obj, HandleId id, bool* resolved)
{
JSRuntime* rt;
const JSStdName* stdnm;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
Rooted<GlobalObject*> global(cx, &obj->as<GlobalObject>());
*resolved = false;
rt = cx->runtime();
if (!rt->hasContexts() || !JSID_IS_ATOM(id))
return true;
/* Check whether we're resolving 'undefined', and define it if so. */
JSAtom* idAtom = JSID_TO_ATOM(id);
JSAtom* undefinedAtom = cx->names().undefined;
if (idAtom == undefinedAtom) {
*resolved = true;
return DefineProperty(cx, global, id, UndefinedHandleValue, nullptr, nullptr,
JSPROP_PERMANENT | JSPROP_READONLY | JSPROP_RESOLVING);
}
/* Try for class constructors/prototypes named by well-known atoms. */
stdnm = LookupStdName(cx->names(), idAtom, standard_class_names);
/* Try less frequently used top-level functions and constants. */
if (!stdnm)
stdnm = LookupStdName(cx->names(), idAtom, builtin_property_names);
if (stdnm && GlobalObject::skipDeselectedConstructor(cx, stdnm->key))
stdnm = nullptr;
// If this class is anonymous, then it doesn't exist as a global
// property, so we won't resolve anything.
JSProtoKey key = stdnm ? stdnm->key : JSProto_Null;
if (key != JSProto_Null) {
const Class* clasp = ProtoKeyToClass(key);
if (!clasp || !(clasp->flags & JSCLASS_IS_ANONYMOUS)) {
if (!GlobalObject::ensureConstructor(cx, global, key))
return false;
*resolved = true;
return true;
}
}
// There is no such property to resolve. An ordinary resolve hook would
// just return true at this point. But the global object is special in one
// more way: its prototype chain is lazily initialized. That is,
// global->getProto() might be null right now because we haven't created
// Object.prototype yet. Force it now.
if (!global->getOrCreateObjectPrototype(cx))
return false;
return true;
}
JS_PUBLIC_API(bool)
JS_MayResolveStandardClass(const JSAtomState& names, jsid id, JSObject* maybeObj)
{
MOZ_ASSERT_IF(maybeObj, maybeObj->is<GlobalObject>());
// The global object's resolve hook is special: JS_ResolveStandardClass
// initializes the prototype chain lazily. Only attempt to optimize here
// if we know the prototype chain has been initialized.
if (!maybeObj || !maybeObj->getProto())
return true;
if (!JSID_IS_ATOM(id))
return false;
JSAtom* atom = JSID_TO_ATOM(id);
// This will return true even for deselected constructors. (To do
// better, we need a JSContext here; it's fine as it is.)
return atom == names.undefined ||
LookupStdName(names, atom, standard_class_names) ||
LookupStdName(names, atom, builtin_property_names);
}
JS_PUBLIC_API(bool)
JS_EnumerateStandardClasses(JSContext* cx, HandleObject obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
MOZ_ASSERT(obj->is<GlobalObject>());
Rooted<GlobalObject*> global(cx, &obj->as<GlobalObject>());
return GlobalObject::initStandardClasses(cx, global);
}
JS_PUBLIC_API(bool)
JS_GetClassObject(JSContext* cx, JSProtoKey key, MutableHandleObject objp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return GetBuiltinConstructor(cx, key, objp);
}
JS_PUBLIC_API(bool)
JS_GetClassPrototype(JSContext* cx, JSProtoKey key, MutableHandleObject objp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return GetBuiltinPrototype(cx, key, objp);
}
namespace JS {
JS_PUBLIC_API(void)
ProtoKeyToId(JSContext* cx, JSProtoKey key, MutableHandleId idp)
{
idp.set(NameToId(ClassName(key, cx)));
}
} /* namespace JS */
JS_PUBLIC_API(JSProtoKey)
JS_IdToProtoKey(JSContext* cx, HandleId id)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!JSID_IS_ATOM(id))
return JSProto_Null;
JSAtom* atom = JSID_TO_ATOM(id);
const JSStdName* stdnm = LookupStdName(cx->names(), atom, standard_class_names);
if (!stdnm)
return JSProto_Null;
if (GlobalObject::skipDeselectedConstructor(cx, stdnm->key))
return JSProto_Null;
MOZ_ASSERT(MOZ_ARRAY_LENGTH(standard_class_names) == JSProto_LIMIT + 1);
return static_cast<JSProtoKey>(stdnm - standard_class_names);
}
JS_PUBLIC_API(JSObject*)
JS_GetObjectPrototype(JSContext* cx, HandleObject forObj)
{
CHECK_REQUEST(cx);
assertSameCompartment(cx, forObj);
return forObj->global().getOrCreateObjectPrototype(cx);
}
JS_PUBLIC_API(JSObject*)
JS_GetFunctionPrototype(JSContext* cx, HandleObject forObj)
{
CHECK_REQUEST(cx);
assertSameCompartment(cx, forObj);
return forObj->global().getOrCreateFunctionPrototype(cx);
}
JS_PUBLIC_API(JSObject*)
JS_GetArrayPrototype(JSContext* cx, HandleObject forObj)
{
CHECK_REQUEST(cx);
assertSameCompartment(cx, forObj);
Rooted<GlobalObject*> global(cx, &forObj->global());
return GlobalObject::getOrCreateArrayPrototype(cx, global);
}
JS_PUBLIC_API(JSObject*)
JS_GetErrorPrototype(JSContext* cx)
{
CHECK_REQUEST(cx);
Rooted<GlobalObject*> global(cx, cx->global());
return GlobalObject::getOrCreateCustomErrorPrototype(cx, global, JSEXN_ERR);
}
JS_PUBLIC_API(JSObject*)
JS_GetIteratorPrototype(JSContext* cx)
{
CHECK_REQUEST(cx);
Rooted<GlobalObject*> global(cx, cx->global());
return GlobalObject::getOrCreateIteratorPrototype(cx, global);
}
JS_PUBLIC_API(JSObject*)
JS_GetGlobalForObject(JSContext* cx, JSObject* obj)
{
AssertHeapIsIdle(cx);
assertSameCompartment(cx, obj);
return &obj->global();
}
extern JS_PUBLIC_API(bool)
JS_IsGlobalObject(JSObject* obj)
{
return obj->is<GlobalObject>();
}
extern JS_PUBLIC_API(JSObject*)
JS_GlobalLexicalScope(JSObject* obj)
{
return &obj->as<GlobalObject>().lexicalScope();
}
extern JS_PUBLIC_API(bool)
JS_HasExtensibleLexicalScope(JSObject* obj)
{
return obj->is<GlobalObject>() || obj->compartment()->getNonSyntacticLexicalScope(obj);
}
extern JS_PUBLIC_API(JSObject*)
JS_ExtensibleLexicalScope(JSObject* obj)
{
JSObject* lexical = nullptr;
if (obj->is<GlobalObject>())
lexical = JS_GlobalLexicalScope(obj);
else
lexical = obj->compartment()->getNonSyntacticLexicalScope(obj);
MOZ_ASSERT(lexical);
return lexical;
}
JS_PUBLIC_API(JSObject*)
JS_GetGlobalForCompartmentOrNull(JSContext* cx, JSCompartment* c)
{
AssertHeapIsIdleOrIterating(cx);
assertSameCompartment(cx, c);
return c->maybeGlobal();
}
JS_PUBLIC_API(JSObject*)
JS::CurrentGlobalOrNull(JSContext* cx)
{
AssertHeapIsIdleOrIterating(cx);
CHECK_REQUEST(cx);
if (!cx->compartment())
return nullptr;
return cx->global();
}
JS_PUBLIC_API(Value)
JS_ComputeThis(JSContext* cx, Value* vp)
{
AssertHeapIsIdle(cx);
assertSameCompartment(cx, JSValueArray(vp, 2));
CallReceiver call = CallReceiverFromVp(vp);
if (!BoxNonStrictThis(cx, call))
return NullValue();
return call.thisv();
}
JS_PUBLIC_API(void*)
JS_malloc(JSContext* cx, size_t nbytes)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return static_cast<void*>(cx->runtime()->pod_malloc<uint8_t>(nbytes));
}
JS_PUBLIC_API(void*)
JS_realloc(JSContext* cx, void* p, size_t oldBytes, size_t newBytes)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return static_cast<void*>(cx->zone()->pod_realloc<uint8_t>(static_cast<uint8_t*>(p), oldBytes,
newBytes));
}
JS_PUBLIC_API(void)
JS_free(JSContext* cx, void* p)
{
return js_free(p);
}
JS_PUBLIC_API(void)
JS_freeop(JSFreeOp* fop, void* p)
{
return FreeOp::get(fop)->free_(p);
}
JS_PUBLIC_API(JSFreeOp*)
JS_GetDefaultFreeOp(JSRuntime* rt)
{
return rt->defaultFreeOp();
}
JS_PUBLIC_API(void)
JS_updateMallocCounter(JSContext* cx, size_t nbytes)
{
return cx->runtime()->updateMallocCounter(cx->zone(), nbytes);
}
JS_PUBLIC_API(char*)
JS_strdup(JSContext* cx, const char* s)
{
AssertHeapIsIdle(cx);
return DuplicateString(cx, s).release();
}
JS_PUBLIC_API(char*)
JS_strdup(JSRuntime* rt, const char* s)
{
AssertHeapIsIdle(rt);
size_t n = strlen(s) + 1;
char* p = rt->pod_malloc<char>(n);
if (!p)
return nullptr;
return static_cast<char*>(js_memcpy(p, s, n));
}
#undef JS_AddRoot
JS_PUBLIC_API(bool)
JS_AddExtraGCRootsTracer(JSRuntime* rt, JSTraceDataOp traceOp, void* data)
{
return rt->gc.addBlackRootsTracer(traceOp, data);
}
JS_PUBLIC_API(void)
JS_RemoveExtraGCRootsTracer(JSRuntime* rt, JSTraceDataOp traceOp, void* data)
{
return rt->gc.removeBlackRootsTracer(traceOp, data);
}
JS_PUBLIC_API(void)
JS_GC(JSRuntime* rt)
{
AssertHeapIsIdle(rt);
JS::PrepareForFullGC(rt);
rt->gc.gc(GC_NORMAL, JS::gcreason::API);
}
JS_PUBLIC_API(void)
JS_MaybeGC(JSContext* cx)
{
GCRuntime& gc = cx->runtime()->gc;
if (!gc.maybeGC(cx->zone()))
gc.maybePeriodicFullGC();
}
JS_PUBLIC_API(void)
JS_SetGCCallback(JSRuntime* rt, JSGCCallback cb, void* data)
{
AssertHeapIsIdle(rt);
rt->gc.setGCCallback(cb, data);
}
JS_PUBLIC_API(void)
JS_SetObjectsTenuredCallback(JSRuntime* rt, JSObjectsTenuredCallback cb,
void* data)
{
AssertHeapIsIdle(rt);
rt->gc.setObjectsTenuredCallback(cb, data);
}
JS_PUBLIC_API(bool)
JS_AddFinalizeCallback(JSRuntime* rt, JSFinalizeCallback cb, void* data)
{
AssertHeapIsIdle(rt);
return rt->gc.addFinalizeCallback(cb, data);
}
JS_PUBLIC_API(void)
JS_RemoveFinalizeCallback(JSRuntime* rt, JSFinalizeCallback cb)
{
rt->gc.removeFinalizeCallback(cb);
}
JS_PUBLIC_API(bool)
JS_AddWeakPointerZoneGroupCallback(JSRuntime* rt, JSWeakPointerZoneGroupCallback cb, void* data)
{
AssertHeapIsIdle(rt);
return rt->gc.addWeakPointerZoneGroupCallback(cb, data);
}
JS_PUBLIC_API(void)
JS_RemoveWeakPointerZoneGroupCallback(JSRuntime* rt, JSWeakPointerZoneGroupCallback cb)
{
rt->gc.removeWeakPointerZoneGroupCallback(cb);
}
JS_PUBLIC_API(bool)
JS_AddWeakPointerCompartmentCallback(JSRuntime* rt, JSWeakPointerCompartmentCallback cb,
void* data)
{
AssertHeapIsIdle(rt);
return rt->gc.addWeakPointerCompartmentCallback(cb, data);
}
JS_PUBLIC_API(void)
JS_RemoveWeakPointerCompartmentCallback(JSRuntime* rt, JSWeakPointerCompartmentCallback cb)
{
rt->gc.removeWeakPointerCompartmentCallback(cb);
}
JS_PUBLIC_API(void)
JS_UpdateWeakPointerAfterGC(JS::Heap<JSObject*>* objp)
{
JS_UpdateWeakPointerAfterGCUnbarriered(objp->unsafeGet());
}
JS_PUBLIC_API(void)
JS_UpdateWeakPointerAfterGCUnbarriered(JSObject** objp)
{
if (IsAboutToBeFinalizedUnbarriered(objp))
*objp = nullptr;
}
JS_PUBLIC_API(void)
JS_SetGCParameter(JSRuntime* rt, JSGCParamKey key, uint32_t value)
{
rt->gc.waitBackgroundSweepEnd();
AutoLockGC lock(rt);
MOZ_ALWAYS_TRUE(rt->gc.setParameter(key, value, lock));
}
JS_PUBLIC_API(uint32_t)
JS_GetGCParameter(JSRuntime* rt, JSGCParamKey key)
{
AutoLockGC lock(rt);
return rt->gc.getParameter(key, lock);
}
static const size_t NumGCConfigs = 14;
struct JSGCConfig {
JSGCParamKey key;
uint32_t value;
};
JS_PUBLIC_API(void)
JS_SetGCParametersBasedOnAvailableMemory(JSRuntime* rt, uint32_t availMem)
{
static const JSGCConfig minimal[NumGCConfigs] = {
{JSGC_MAX_MALLOC_BYTES, 6 * 1024 * 1024},
{JSGC_SLICE_TIME_BUDGET, 30},
{JSGC_HIGH_FREQUENCY_TIME_LIMIT, 1500},
{JSGC_HIGH_FREQUENCY_HIGH_LIMIT, 40},
{JSGC_HIGH_FREQUENCY_LOW_LIMIT, 0},
{JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MAX, 300},
{JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MIN, 120},
{JSGC_LOW_FREQUENCY_HEAP_GROWTH, 120},
{JSGC_HIGH_FREQUENCY_TIME_LIMIT, 1500},
{JSGC_HIGH_FREQUENCY_TIME_LIMIT, 1500},
{JSGC_HIGH_FREQUENCY_TIME_LIMIT, 1500},
{JSGC_ALLOCATION_THRESHOLD, 1},
{JSGC_DECOMMIT_THRESHOLD, 1},
{JSGC_MODE, JSGC_MODE_INCREMENTAL}
};
const JSGCConfig* config = minimal;
if (availMem > 512) {
static const JSGCConfig nominal[NumGCConfigs] = {
{JSGC_MAX_MALLOC_BYTES, 6 * 1024 * 1024},
{JSGC_SLICE_TIME_BUDGET, 30},
{JSGC_HIGH_FREQUENCY_TIME_LIMIT, 1000},
{JSGC_HIGH_FREQUENCY_HIGH_LIMIT, 500},
{JSGC_HIGH_FREQUENCY_LOW_LIMIT, 100},
{JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MAX, 300},
{JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MIN, 150},
{JSGC_LOW_FREQUENCY_HEAP_GROWTH, 150},
{JSGC_HIGH_FREQUENCY_TIME_LIMIT, 1500},
{JSGC_HIGH_FREQUENCY_TIME_LIMIT, 1500},
{JSGC_HIGH_FREQUENCY_TIME_LIMIT, 1500},
{JSGC_ALLOCATION_THRESHOLD, 30},
{JSGC_DECOMMIT_THRESHOLD, 32},
{JSGC_MODE, JSGC_MODE_COMPARTMENT}
};
config = nominal;
}
for (size_t i = 0; i < NumGCConfigs; i++)
JS_SetGCParameter(rt, config[i].key, config[i].value);
}
JS_PUBLIC_API(JSString*)
JS_NewExternalString(JSContext* cx, const char16_t* chars, size_t length,
const JSStringFinalizer* fin)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSString* s = JSExternalString::new_(cx, chars, length, fin);
return s;
}
extern JS_PUBLIC_API(bool)
JS_IsExternalString(JSString* str)
{
return str->isExternal();
}
extern JS_PUBLIC_API(const JSStringFinalizer*)
JS_GetExternalStringFinalizer(JSString* str)
{
return str->asExternal().externalFinalizer();
}
static void
SetNativeStackQuotaAndLimit(JSRuntime* rt, StackKind kind, size_t stackSize)
{
rt->nativeStackQuota[kind] = stackSize;
#if JS_STACK_GROWTH_DIRECTION > 0
if (stackSize == 0) {
rt->mainThread.nativeStackLimit[kind] = UINTPTR_MAX;
} else {
MOZ_ASSERT(rt->nativeStackBase <= size_t(-1) - stackSize);
rt->mainThread.nativeStackLimit[kind] = rt->nativeStackBase + stackSize - 1;
}
#else
if (stackSize == 0) {
rt->mainThread.nativeStackLimit[kind] = 0;
} else {
MOZ_ASSERT(rt->nativeStackBase >= stackSize);
rt->mainThread.nativeStackLimit[kind] = rt->nativeStackBase - (stackSize - 1);
}
#endif
}
JS_PUBLIC_API(void)
JS_SetNativeStackQuota(JSRuntime* rt, size_t systemCodeStackSize, size_t trustedScriptStackSize,
size_t untrustedScriptStackSize)
{
MOZ_ASSERT(rt->requestDepth == 0);
if (!trustedScriptStackSize)
trustedScriptStackSize = systemCodeStackSize;
else
MOZ_ASSERT(trustedScriptStackSize < systemCodeStackSize);
if (!untrustedScriptStackSize)
untrustedScriptStackSize = trustedScriptStackSize;
else
MOZ_ASSERT(untrustedScriptStackSize < trustedScriptStackSize);
SetNativeStackQuotaAndLimit(rt, StackForSystemCode, systemCodeStackSize);
SetNativeStackQuotaAndLimit(rt, StackForTrustedScript, trustedScriptStackSize);
SetNativeStackQuotaAndLimit(rt, StackForUntrustedScript, untrustedScriptStackSize);
rt->initJitStackLimit();
}
/************************************************************************/
JS_PUBLIC_API(bool)
JS_ValueToId(JSContext* cx, HandleValue value, MutableHandleId idp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
return ValueToId<CanGC>(cx, value, idp);
}
JS_PUBLIC_API(bool)
JS_StringToId(JSContext* cx, HandleString string, MutableHandleId idp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, string);
RootedValue value(cx, StringValue(string));
return ValueToId<CanGC>(cx, value, idp);
}
JS_PUBLIC_API(bool)
JS_IdToValue(JSContext* cx, jsid id, MutableHandleValue vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
vp.set(IdToValue(id));
assertSameCompartment(cx, vp);
return true;
}
JS_PUBLIC_API(bool)
JS::ToPrimitive(JSContext* cx, HandleObject obj, JSType hint, MutableHandleValue vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
MOZ_ASSERT(obj != nullptr);
MOZ_ASSERT(hint == JSTYPE_VOID || hint == JSTYPE_STRING || hint == JSTYPE_NUMBER);
vp.setObject(*obj);
return ToPrimitiveSlow(cx, hint, vp);
}
JS_PUBLIC_API(bool)
JS::GetFirstArgumentAsTypeHint(JSContext* cx, CallArgs args, JSType *result)
{
if (!args.get(0).isString()) {
JS_ReportErrorNumber(cx, GetErrorMessage, nullptr, JSMSG_NOT_EXPECTED_TYPE,
"Symbol.toPrimitive",
"\"string\", \"number\", or \"default\"",
InformalValueTypeName(args.get(0)));
return false;
}
RootedString str(cx, args.get(0).toString());
bool match;
if (!EqualStrings(cx, str, cx->names().default_, &match))
return false;
if (match) {
*result = JSTYPE_VOID;
return true;
}
if (!EqualStrings(cx, str, cx->names().string, &match))
return false;
if (match) {
*result = JSTYPE_STRING;
return true;
}
if (!EqualStrings(cx, str, cx->names().number, &match))
return false;
if (match) {
*result = JSTYPE_NUMBER;
return true;
}
JSAutoByteString bytes;
const char* source = ValueToSourceForError(cx, args.get(0), bytes);
if (!source) {
ReportOutOfMemory(cx);
return false;
}
JS_ReportErrorNumber(cx, GetErrorMessage, nullptr, JSMSG_NOT_EXPECTED_TYPE,
"Symbol.toPrimitive",
"\"string\", \"number\", or \"default\"", source);
return false;
}
JS_PUBLIC_API(bool)
JS_PropertyStub(JSContext* cx, HandleObject obj, HandleId id, MutableHandleValue vp)
{
return true;
}
JS_PUBLIC_API(bool)
JS_StrictPropertyStub(JSContext* cx, HandleObject obj, HandleId id, MutableHandleValue vp,
ObjectOpResult& result)
{
return result.succeed();
}
JS_PUBLIC_API(JSObject*)
JS_InitClass(JSContext* cx, HandleObject obj, HandleObject parent_proto,
const JSClass* clasp, JSNative constructor, unsigned nargs,
const JSPropertySpec* ps, const JSFunctionSpec* fs,
const JSPropertySpec* static_ps, const JSFunctionSpec* static_fs)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, parent_proto);
return InitClass(cx, obj, parent_proto, Valueify(clasp), constructor,
nargs, ps, fs, static_ps, static_fs);
}
JS_PUBLIC_API(bool)
JS_LinkConstructorAndPrototype(JSContext* cx, HandleObject ctor, HandleObject proto)
{
return LinkConstructorAndPrototype(cx, ctor, proto);
}
JS_PUBLIC_API(const JSClass*)
JS_GetClass(JSObject* obj)
{
return obj->getJSClass();
}
JS_PUBLIC_API(bool)
JS_InstanceOf(JSContext* cx, HandleObject obj, const JSClass* clasp, CallArgs* args)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
#ifdef DEBUG
if (args) {
assertSameCompartment(cx, obj);
assertSameCompartment(cx, args->thisv(), args->calleev());
}
#endif
if (!obj || obj->getJSClass() != clasp) {
if (args)
ReportIncompatibleMethod(cx, *args, Valueify(clasp));
return false;
}
return true;
}
JS_PUBLIC_API(bool)
JS_HasInstance(JSContext* cx, HandleObject obj, HandleValue value, bool* bp)
{
AssertHeapIsIdle(cx);
assertSameCompartment(cx, obj, value);
return HasInstance(cx, obj, value, bp);
}
JS_PUBLIC_API(void*)
JS_GetPrivate(JSObject* obj)
{
/* This function can be called by a finalizer. */
return obj->as<NativeObject>().getPrivate();
}
JS_PUBLIC_API(void)
JS_SetPrivate(JSObject* obj, void* data)
{
/* This function can be called by a finalizer. */
obj->as<NativeObject>().setPrivate(data);
}
JS_PUBLIC_API(void*)
JS_GetInstancePrivate(JSContext* cx, HandleObject obj, const JSClass* clasp, CallArgs* args)
{
if (!JS_InstanceOf(cx, obj, clasp, args))
return nullptr;
return obj->as<NativeObject>().getPrivate();
}
JS_PUBLIC_API(JSObject*)
JS_GetConstructor(JSContext* cx, HandleObject proto)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, proto);
RootedValue cval(cx);
if (!GetProperty(cx, proto, proto, cx->names().constructor, &cval))
return nullptr;
if (!IsFunctionObject(cval)) {
JS_ReportErrorNumber(cx, GetErrorMessage, nullptr, JSMSG_NO_CONSTRUCTOR,
proto->getClass()->name);
return nullptr;
}
return &cval.toObject();
}
bool
JS::CompartmentBehaviors::extraWarnings(JSRuntime* rt) const
{
return extraWarningsOverride_.get(rt->options().extraWarnings());
}
bool
JS::CompartmentBehaviors::extraWarnings(JSContext* cx) const
{
return extraWarnings(cx->runtime());
}
JS::CompartmentCreationOptions&
JS::CompartmentCreationOptions::setZone(ZoneSpecifier spec)
{
zone_.spec = spec;
return *this;
}
JS::CompartmentCreationOptions&
JS::CompartmentCreationOptions::setSameZoneAs(JSObject* obj)
{
zone_.pointer = static_cast<void*>(obj->zone());
return *this;
}
const JS::CompartmentCreationOptions&
JS::CompartmentCreationOptionsRef(JSCompartment* compartment)
{
return compartment->creationOptions();
}
const JS::CompartmentCreationOptions&
JS::CompartmentCreationOptionsRef(JSObject* obj)
{
return obj->compartment()->creationOptions();
}
const JS::CompartmentCreationOptions&
JS::CompartmentCreationOptionsRef(JSContext* cx)
{
return cx->compartment()->creationOptions();
}
bool
JS::CompartmentCreationOptions::getSharedMemoryAndAtomicsEnabled() const
{
#if defined(ENABLE_SHARED_ARRAY_BUFFER)
return sharedMemoryAndAtomics_;
#else
return false;
#endif
}
JS::CompartmentCreationOptions&
JS::CompartmentCreationOptions::setSharedMemoryAndAtomicsEnabled(bool flag)
{
#if defined(ENABLE_SHARED_ARRAY_BUFFER)
sharedMemoryAndAtomics_ = flag;
#endif
return *this;
}
JS::CompartmentBehaviors&
JS::CompartmentBehaviorsRef(JSCompartment* compartment)
{
return compartment->behaviors();
}
JS::CompartmentBehaviors&
JS::CompartmentBehaviorsRef(JSObject* obj)
{
return obj->compartment()->behaviors();
}
JS::CompartmentBehaviors&
JS::CompartmentBehaviorsRef(JSContext* cx)
{
return cx->compartment()->behaviors();
}
JS_PUBLIC_API(JSObject*)
JS_NewGlobalObject(JSContext* cx, const JSClass* clasp, JSPrincipals* principals,
JS::OnNewGlobalHookOption hookOption,
const JS::CompartmentOptions& options)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return GlobalObject::new_(cx, Valueify(clasp), principals, hookOption, options);
}
JS_PUBLIC_API(void)
JS_GlobalObjectTraceHook(JSTracer* trc, JSObject* global)
{
MOZ_ASSERT(global->is<GlobalObject>());
// Off thread parsing and compilation tasks create a dummy global which is then
// merged back into the host compartment. Since it used to be a global, it will still
// have this trace hook, but it does not have a meaning relative to its new compartment.
// We can safely skip it.
if (!global->isOwnGlobal())
return;
// Trace the compartment for any GC things that should only stick around if we know the
// compartment is live.
global->compartment()->trace(trc);
if (JSTraceOp trace = global->compartment()->creationOptions().getTrace())
trace(trc, global);
}
JS_PUBLIC_API(void)
JS_FireOnNewGlobalObject(JSContext* cx, JS::HandleObject global)
{
// This hook is infallible, because we don't really want arbitrary script
// to be able to throw errors during delicate global creation routines.
// This infallibility will eat OOM and slow script, but if that happens
// we'll likely run up into them again soon in a fallible context.
Rooted<js::GlobalObject*> globalObject(cx, &global->as<GlobalObject>());
Debugger::onNewGlobalObject(cx, globalObject);
}
JS_PUBLIC_API(JSObject*)
JS_NewObject(JSContext* cx, const JSClass* jsclasp)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
const Class* clasp = Valueify(jsclasp);
if (!clasp)
clasp = &PlainObject::class_; /* default class is Object */
MOZ_ASSERT(clasp != &JSFunction::class_);
MOZ_ASSERT(!(clasp->flags & JSCLASS_IS_GLOBAL));
return NewObjectWithClassProto(cx, clasp, nullptr);
}
JS_PUBLIC_API(JSObject*)
JS_NewObjectWithGivenProto(JSContext* cx, const JSClass* jsclasp, HandleObject proto)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, proto);
const Class* clasp = Valueify(jsclasp);
if (!clasp)
clasp = &PlainObject::class_; /* default class is Object */
MOZ_ASSERT(clasp != &JSFunction::class_);
MOZ_ASSERT(!(clasp->flags & JSCLASS_IS_GLOBAL));
return NewObjectWithGivenProto(cx, clasp, proto);
}
JS_PUBLIC_API(JSObject*)
JS_NewPlainObject(JSContext* cx)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return NewBuiltinClassInstance<PlainObject>(cx);
}
JS_PUBLIC_API(JSObject*)
JS_NewObjectForConstructor(JSContext* cx, const JSClass* clasp, const CallArgs& args)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
Value callee = args.calleev();
assertSameCompartment(cx, callee);
RootedObject obj(cx, &callee.toObject());
return CreateThis(cx, Valueify(clasp), obj);
}
JS_PUBLIC_API(bool)
JS_IsNative(JSObject* obj)
{
return obj->isNative();
}
JS_PUBLIC_API(JSRuntime*)
JS_GetObjectRuntime(JSObject* obj)
{
return obj->compartment()->runtimeFromMainThread();
}
/*** Standard internal methods *******************************************************************/
JS_PUBLIC_API(bool)
JS_GetPrototype(JSContext* cx, HandleObject obj, MutableHandleObject result)
{
return GetPrototype(cx, obj, result);
}
JS_PUBLIC_API(bool)
JS_SetPrototype(JSContext* cx, HandleObject obj, HandleObject proto)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, proto);
return SetPrototype(cx, obj, proto);
}
JS_PUBLIC_API(bool)
JS_IsExtensible(JSContext* cx, HandleObject obj, bool* extensible)
{
return IsExtensible(cx, obj, extensible);
}
JS_PUBLIC_API(bool)
JS_PreventExtensions(JSContext* cx, JS::HandleObject obj, ObjectOpResult& result)
{
return PreventExtensions(cx, obj, result);
}
JS_PUBLIC_API(bool)
JS_SetImmutablePrototype(JSContext *cx, JS::HandleObject obj, bool *succeeded)
{
return SetImmutablePrototype(cx, obj, succeeded);
}
JS_PUBLIC_API(bool)
JS_GetOwnPropertyDescriptorById(JSContext* cx, HandleObject obj, HandleId id,
MutableHandle<PropertyDescriptor> desc)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return GetOwnPropertyDescriptor(cx, obj, id, desc);
}
JS_PUBLIC_API(bool)
JS_GetOwnPropertyDescriptor(JSContext* cx, HandleObject obj, const char* name,
MutableHandle<PropertyDescriptor> desc)
{
JSAtom* atom = Atomize(cx, name, strlen(name));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return JS_GetOwnPropertyDescriptorById(cx, obj, id, desc);
}
JS_PUBLIC_API(bool)
JS_GetOwnUCPropertyDescriptor(JSContext* cx, HandleObject obj, const char16_t* name,
MutableHandle<PropertyDescriptor> desc)
{
JSAtom* atom = AtomizeChars(cx, name, js_strlen(name));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return JS_GetOwnPropertyDescriptorById(cx, obj, id, desc);
}
JS_PUBLIC_API(bool)
JS_GetPropertyDescriptorById(JSContext* cx, HandleObject obj, HandleId id,
MutableHandle<PropertyDescriptor> desc)
{
return GetPropertyDescriptor(cx, obj, id, desc);
}
JS_PUBLIC_API(bool)
JS_GetPropertyDescriptor(JSContext* cx, HandleObject obj, const char* name,
MutableHandle<PropertyDescriptor> desc)
{
JSAtom* atom = Atomize(cx, name, strlen(name));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return atom && JS_GetPropertyDescriptorById(cx, obj, id, desc);
}
static bool
DefinePropertyByDescriptor(JSContext* cx, HandleObject obj, HandleId id,
Handle<PropertyDescriptor> desc, ObjectOpResult& result)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id, desc);
return DefineProperty(cx, obj, id, desc.value(), desc.getter(), desc.setter(),
desc.attributes(), result);
}
JS_PUBLIC_API(bool)
JS_DefinePropertyById(JSContext* cx, HandleObject obj, HandleId id,
Handle<PropertyDescriptor> desc, ObjectOpResult& result)
{
return DefinePropertyByDescriptor(cx, obj, id, desc, result);
}
JS_PUBLIC_API(bool)
JS_DefinePropertyById(JSContext* cx, HandleObject obj, HandleId id,
Handle<PropertyDescriptor> desc)
{
ObjectOpResult result;
return DefinePropertyByDescriptor(cx, obj, id, desc, result) &&
result.checkStrict(cx, obj, id);
}
static bool
DefinePropertyById(JSContext* cx, HandleObject obj, HandleId id, HandleValue value,
const JSNativeWrapper& get, const JSNativeWrapper& set,
unsigned attrs, unsigned flags)
{
JSGetterOp getter = JS_CAST_NATIVE_TO(get.op, JSGetterOp);
JSSetterOp setter = JS_CAST_NATIVE_TO(set.op, JSSetterOp);
// 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.
//
// But skip doing this if our accessors are the well-known stub
// accessors, since those are known to be JSGetterOps. Assert
// some sanity about it, though.
MOZ_ASSERT_IF(getter == JS_PropertyStub,
setter == JS_StrictPropertyStub || (attrs & JSPROP_PROPOP_ACCESSORS));
MOZ_ASSERT_IF(setter == JS_StrictPropertyStub,
getter == JS_PropertyStub || (attrs & JSPROP_PROPOP_ACCESSORS));
// If !(attrs & JSPROP_PROPOP_ACCESSORS), then either getter/setter are both
// possibly-null JSNatives (or possibly-null JSFunction* if JSPROP_GETTER or
// JSPROP_SETTER is appropriately set), or both are the well-known property
// stubs. The subsequent block must handle only the first of these cases,
// so carefully exclude the latter case.
if (!(attrs & JSPROP_PROPOP_ACCESSORS) &&
getter != JS_PropertyStub && setter != JS_StrictPropertyStub)
{
if (getter && !(attrs & JSPROP_GETTER)) {
RootedAtom atom(cx, IdToFunctionName(cx, id, "get"));
if (!atom)
return false;
JSFunction* getobj = NewNativeFunction(cx, (Native) getter, 0, atom);
if (!getobj)
return false;
if (get.info)
getobj->setJitInfo(get.info);
getter = JS_DATA_TO_FUNC_PTR(GetterOp, getobj);
attrs |= JSPROP_GETTER;
}
if (setter && !(attrs & JSPROP_SETTER)) {
// Root just the getter, since the setter is not yet a JSObject.
AutoRooterGetterSetter getRoot(cx, JSPROP_GETTER, &getter, nullptr);
RootedAtom atom(cx, IdToFunctionName(cx, id, "set"));
if (!atom)
return false;
JSFunction* setobj = NewNativeFunction(cx, (Native) setter, 1, atom);
if (!setobj)
return false;
if (set.info)
setobj->setJitInfo(set.info);
setter = JS_DATA_TO_FUNC_PTR(SetterOp, setobj);
attrs |= JSPROP_SETTER;
}
} else {
attrs &= ~JSPROP_PROPOP_ACCESSORS;
}
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id, value,
(attrs & JSPROP_GETTER)
? JS_FUNC_TO_DATA_PTR(JSObject*, getter)
: nullptr,
(attrs & JSPROP_SETTER)
? JS_FUNC_TO_DATA_PTR(JSObject*, setter)
: nullptr);
// In most places throughout the engine, a property with null getter and
// not JSPROP_GETTER/SETTER/SHARED has no getter, and the same for setters:
// it's just a plain old data property. However the JS_Define* APIs use
// null getter and setter to mean "default to the Class getProperty and
// setProperty ops".
if (!(attrs & (JSPROP_GETTER | JSPROP_SETTER))) {
if (!getter)
getter = obj->getClass()->getProperty;
if (!setter)
setter = obj->getClass()->setProperty;
}
if (getter == JS_PropertyStub)
getter = nullptr;
if (setter == JS_StrictPropertyStub)
setter = nullptr;
return DefineProperty(cx, obj, id, value, getter, setter, attrs);
}
/*
* Wrapper functions to create wrappers with no corresponding JSJitInfo from API
* function arguments.
*/
static JSNativeWrapper
NativeOpWrapper(Native native)
{
JSNativeWrapper ret;
ret.op = native;
ret.info = nullptr;
return ret;
}
JS_PUBLIC_API(bool)
JS_DefinePropertyById(JSContext* cx, HandleObject obj, HandleId id, HandleValue value,
unsigned attrs, Native getter, Native setter)
{
return DefinePropertyById(cx, obj, id, value,
NativeOpWrapper(getter), NativeOpWrapper(setter),
attrs, 0);
}
JS_PUBLIC_API(bool)
JS_DefinePropertyById(JSContext* cx, HandleObject obj, HandleId id, HandleObject valueArg,
unsigned attrs, Native getter, Native setter)
{
RootedValue value(cx, ObjectValue(*valueArg));
return DefinePropertyById(cx, obj, id, value,
NativeOpWrapper(getter), NativeOpWrapper(setter),
attrs, 0);
}
JS_PUBLIC_API(bool)
JS_DefinePropertyById(JSContext* cx, HandleObject obj, HandleId id, HandleString valueArg,
unsigned attrs, Native getter, Native setter)
{
RootedValue value(cx, StringValue(valueArg));
return DefinePropertyById(cx, obj, id, value,
NativeOpWrapper(getter), NativeOpWrapper(setter),
attrs, 0);
}
JS_PUBLIC_API(bool)
JS_DefinePropertyById(JSContext* cx, HandleObject obj, HandleId id, int32_t valueArg,
unsigned attrs, Native getter, Native setter)
{
Value value = Int32Value(valueArg);
return DefinePropertyById(cx, obj, id, HandleValue::fromMarkedLocation(&value),
NativeOpWrapper(getter), NativeOpWrapper(setter), attrs, 0);
}
JS_PUBLIC_API(bool)
JS_DefinePropertyById(JSContext* cx, HandleObject obj, HandleId id, uint32_t valueArg,
unsigned attrs, Native getter, Native setter)
{
Value value = NumberValue(valueArg);
return DefinePropertyById(cx, obj, id, HandleValue::fromMarkedLocation(&value),
NativeOpWrapper(getter), NativeOpWrapper(setter), attrs, 0);
}
JS_PUBLIC_API(bool)
JS_DefinePropertyById(JSContext* cx, HandleObject obj, HandleId id, double valueArg,
unsigned attrs, Native getter, Native setter)
{
Value value = NumberValue(valueArg);
return DefinePropertyById(cx, obj, id, HandleValue::fromMarkedLocation(&value),
NativeOpWrapper(getter), NativeOpWrapper(setter), attrs, 0);
}
static bool
DefineProperty(JSContext* cx, HandleObject obj, const char* name, HandleValue value,
const JSNativeWrapper& getter, const JSNativeWrapper& setter,
unsigned attrs, unsigned flags)
{
AutoRooterGetterSetter gsRoot(cx, attrs, const_cast<JSNative*>(&getter.op),
const_cast<JSNative*>(&setter.op));
JSAtom* atom = Atomize(cx, name, strlen(name));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return DefinePropertyById(cx, obj, id, value, getter, setter, attrs, flags);
}
JS_PUBLIC_API(bool)
JS_DefineProperty(JSContext* cx, HandleObject obj, const char* name, HandleValue value,
unsigned attrs,
Native getter /* = nullptr */, Native setter /* = nullptr */)
{
return DefineProperty(cx, obj, name, value, NativeOpWrapper(getter), NativeOpWrapper(setter),
attrs, 0);
}
JS_PUBLIC_API(bool)
JS_DefineProperty(JSContext* cx, HandleObject obj, const char* name, HandleObject valueArg,
unsigned attrs,
Native getter /* = nullptr */, Native setter /* = nullptr */)
{
RootedValue value(cx, ObjectValue(*valueArg));
return DefineProperty(cx, obj, name, value, NativeOpWrapper(getter), NativeOpWrapper(setter),
attrs, 0);
}
JS_PUBLIC_API(bool)
JS_DefineProperty(JSContext* cx, HandleObject obj, const char* name, HandleString valueArg,
unsigned attrs,
Native getter /* = nullptr */, Native setter /* = nullptr */)
{
RootedValue value(cx, StringValue(valueArg));
return DefineProperty(cx, obj, name, value, NativeOpWrapper(getter), NativeOpWrapper(setter),
attrs, 0);
}
JS_PUBLIC_API(bool)
JS_DefineProperty(JSContext* cx, HandleObject obj, const char* name, int32_t valueArg,
unsigned attrs,
Native getter /* = nullptr */, Native setter /* = nullptr */)
{
Value value = Int32Value(valueArg);
return DefineProperty(cx, obj, name, HandleValue::fromMarkedLocation(&value),
NativeOpWrapper(getter), NativeOpWrapper(setter), attrs, 0);
}
JS_PUBLIC_API(bool)
JS_DefineProperty(JSContext* cx, HandleObject obj, const char* name, uint32_t valueArg,
unsigned attrs,
Native getter /* = nullptr */, Native setter /* = nullptr */)
{
Value value = NumberValue(valueArg);
return DefineProperty(cx, obj, name, HandleValue::fromMarkedLocation(&value),
NativeOpWrapper(getter), NativeOpWrapper(setter), attrs, 0);
}
JS_PUBLIC_API(bool)
JS_DefineProperty(JSContext* cx, HandleObject obj, const char* name, double valueArg,
unsigned attrs,
Native getter /* = nullptr */, Native setter /* = nullptr */)
{
Value value = NumberValue(valueArg);
return DefineProperty(cx, obj, name, HandleValue::fromMarkedLocation(&value),
NativeOpWrapper(getter), NativeOpWrapper(setter), attrs, 0);
}
#define AUTO_NAMELEN(s,n) (((n) == (size_t)-1) ? js_strlen(s) : (n))
JS_PUBLIC_API(bool)
JS_DefineUCProperty(JSContext* cx, HandleObject obj, const char16_t* name, size_t namelen,
Handle<PropertyDescriptor> desc,
ObjectOpResult& result)
{
JSAtom* atom = AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return DefinePropertyByDescriptor(cx, obj, id, desc, result);
}
JS_PUBLIC_API(bool)
JS_DefineUCProperty(JSContext* cx, HandleObject obj, const char16_t* name, size_t namelen,
Handle<PropertyDescriptor> desc)
{
JSAtom* atom = AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
ObjectOpResult result;
return DefinePropertyByDescriptor(cx, obj, id, desc, result) &&
result.checkStrict(cx, obj, id);
}
static bool
DefineUCProperty(JSContext* cx, HandleObject obj, const char16_t* name, size_t namelen,
const Value& value_, Native getter, Native setter, unsigned attrs,
unsigned flags)
{
RootedValue value(cx, value_);
AutoRooterGetterSetter gsRoot(cx, attrs, &getter, &setter);
JSAtom* atom = AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return DefinePropertyById(cx, obj, id, value, NativeOpWrapper(getter), NativeOpWrapper(setter),
attrs, flags);
}
JS_PUBLIC_API(bool)
JS_DefineUCProperty(JSContext* cx, HandleObject obj, const char16_t* name, size_t namelen,
HandleValue value, unsigned attrs, Native getter, Native setter)
{
return DefineUCProperty(cx, obj, name, namelen, value, getter, setter, attrs, 0);
}
JS_PUBLIC_API(bool)
JS_DefineUCProperty(JSContext* cx, HandleObject obj, const char16_t* name, size_t namelen,
HandleObject valueArg, unsigned attrs, Native getter, Native setter)
{
RootedValue value(cx, ObjectValue(*valueArg));
return DefineUCProperty(cx, obj, name, namelen, value, getter, setter, attrs, 0);
}
JS_PUBLIC_API(bool)
JS_DefineUCProperty(JSContext* cx, HandleObject obj, const char16_t* name, size_t namelen,
HandleString valueArg, unsigned attrs, Native getter, Native setter)
{
RootedValue value(cx, StringValue(valueArg));
return DefineUCProperty(cx, obj, name, namelen, value, getter, setter, attrs, 0);
}
JS_PUBLIC_API(bool)
JS_DefineUCProperty(JSContext* cx, HandleObject obj, const char16_t* name, size_t namelen,
int32_t valueArg, unsigned attrs, Native getter, Native setter)
{
Value value = Int32Value(valueArg);
return DefineUCProperty(cx, obj, name, namelen, HandleValue::fromMarkedLocation(&value),
getter, setter, attrs, 0);
}
JS_PUBLIC_API(bool)
JS_DefineUCProperty(JSContext* cx, HandleObject obj, const char16_t* name, size_t namelen,
uint32_t valueArg, unsigned attrs, Native getter, Native setter)
{
Value value = NumberValue(valueArg);
return DefineUCProperty(cx, obj, name, namelen, HandleValue::fromMarkedLocation(&value),
getter, setter, attrs, 0);
}
JS_PUBLIC_API(bool)
JS_DefineUCProperty(JSContext* cx, HandleObject obj, const char16_t* name, size_t namelen,
double valueArg, unsigned attrs, Native getter, Native setter)
{
Value value = NumberValue(valueArg);
return DefineUCProperty(cx, obj, name, namelen, HandleValue::fromMarkedLocation(&value),
getter, setter, attrs, 0);
}
static bool
DefineElement(JSContext* cx, HandleObject obj, uint32_t index, HandleValue value,
unsigned attrs, Native getter, Native setter)
{
AutoRooterGetterSetter gsRoot(cx, attrs, &getter, &setter);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedId id(cx);
if (!IndexToId(cx, index, &id))
return false;
return DefinePropertyById(cx, obj, id, value,
NativeOpWrapper(getter), NativeOpWrapper(setter),
attrs, 0);
}
JS_PUBLIC_API(bool)
JS_DefineElement(JSContext* cx, HandleObject obj, uint32_t index, HandleValue value,
unsigned attrs, Native getter, Native setter)
{
return DefineElement(cx, obj, index, value, attrs, getter, setter);
}
JS_PUBLIC_API(bool)
JS_DefineElement(JSContext* cx, HandleObject obj, uint32_t index, HandleObject valueArg,
unsigned attrs, Native getter, Native setter)
{
RootedValue value(cx, ObjectValue(*valueArg));
return DefineElement(cx, obj, index, value, attrs, getter, setter);
}
JS_PUBLIC_API(bool)
JS_DefineElement(JSContext* cx, HandleObject obj, uint32_t index, HandleString valueArg,
unsigned attrs, Native getter, Native setter)
{
RootedValue value(cx, StringValue(valueArg));
return DefineElement(cx, obj, index, value, attrs, getter, setter);
}
JS_PUBLIC_API(bool)
JS_DefineElement(JSContext* cx, HandleObject obj, uint32_t index, int32_t valueArg,
unsigned attrs, Native getter, Native setter)
{
Value value = Int32Value(valueArg);
return DefineElement(cx, obj, index, HandleValue::fromMarkedLocation(&value),
attrs, getter, setter);
}
JS_PUBLIC_API(bool)
JS_DefineElement(JSContext* cx, HandleObject obj, uint32_t index, uint32_t valueArg,
unsigned attrs, Native getter, Native setter)
{
Value value = NumberValue(valueArg);
return DefineElement(cx, obj, index, HandleValue::fromMarkedLocation(&value),
attrs, getter, setter);
}
JS_PUBLIC_API(bool)
JS_DefineElement(JSContext* cx, HandleObject obj, uint32_t index, double valueArg,
unsigned attrs, Native getter, Native setter)
{
Value value = NumberValue(valueArg);
return DefineElement(cx, obj, index, HandleValue::fromMarkedLocation(&value),
attrs, getter, setter);
}
JS_PUBLIC_API(bool)
JS_HasPropertyById(JSContext* cx, HandleObject obj, HandleId id, bool* foundp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return HasProperty(cx, obj, id, foundp);
}
JS_PUBLIC_API(bool)
JS_HasProperty(JSContext* cx, HandleObject obj, const char* name, bool* foundp)
{
JSAtom* atom = Atomize(cx, name, strlen(name));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return JS_HasPropertyById(cx, obj, id, foundp);
}
JS_PUBLIC_API(bool)
JS_HasUCProperty(JSContext* cx, HandleObject obj, const char16_t* name, size_t namelen, bool* foundp)
{
JSAtom* atom = AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return JS_HasPropertyById(cx, obj, id, foundp);
}
JS_PUBLIC_API(bool)
JS_HasElement(JSContext* cx, HandleObject obj, uint32_t index, bool* foundp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedId id(cx);
if (!IndexToId(cx, index, &id))
return false;
return JS_HasPropertyById(cx, obj, id, foundp);
}
JS_PUBLIC_API(bool)
JS_HasOwnPropertyById(JSContext* cx, HandleObject obj, HandleId id, bool* foundp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
return HasOwnProperty(cx, obj, id, foundp);
}
JS_PUBLIC_API(bool)
JS_HasOwnProperty(JSContext* cx, HandleObject obj, const char* name, bool* foundp)
{
JSAtom* atom = Atomize(cx, name, strlen(name));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return JS_HasOwnPropertyById(cx, obj, id, foundp);
}
JS_PUBLIC_API(bool)
JS_ForwardGetPropertyTo(JSContext* cx, HandleObject obj, HandleId id, HandleValue receiver,
MutableHandleValue vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id, receiver);
return GetProperty(cx, obj, receiver, id, vp);
}
JS_PUBLIC_API(bool)
JS_ForwardGetElementTo(JSContext* cx, HandleObject obj, uint32_t index, HandleObject receiver,
MutableHandleValue vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
return GetElement(cx, obj, receiver, index, vp);
}
JS_PUBLIC_API(bool)
JS_GetPropertyById(JSContext* cx, HandleObject obj, HandleId id, MutableHandleValue vp)
{
RootedValue receiver(cx, ObjectValue(*obj));
return JS_ForwardGetPropertyTo(cx, obj, id, receiver, vp);
}
JS_PUBLIC_API(bool)
JS_GetProperty(JSContext* cx, HandleObject obj, const char* name, MutableHandleValue vp)
{
JSAtom* atom = Atomize(cx, name, strlen(name));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return JS_GetPropertyById(cx, obj, id, vp);
}
JS_PUBLIC_API(bool)
JS_GetUCProperty(JSContext* cx, HandleObject obj, const char16_t* name, size_t namelen,
MutableHandleValue vp)
{
JSAtom* atom = AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return JS_GetPropertyById(cx, obj, id, vp);
}
JS_PUBLIC_API(bool)
JS_GetElement(JSContext* cx, HandleObject objArg, uint32_t index, MutableHandleValue vp)
{
return JS_ForwardGetElementTo(cx, objArg, index, objArg, vp);
}
JS_PUBLIC_API(bool)
JS_ForwardSetPropertyTo(JSContext* cx, HandleObject obj, HandleId id, HandleValue v,
HandleValue receiver, ObjectOpResult& result)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id, receiver);
return SetProperty(cx, obj, id, v, receiver, result);
}
JS_PUBLIC_API(bool)
JS_SetPropertyById(JSContext* cx, HandleObject obj, HandleId id, HandleValue v)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
RootedValue receiver(cx, ObjectValue(*obj));
ObjectOpResult ignored;
return SetProperty(cx, obj, id, v, receiver, ignored);
}
JS_PUBLIC_API(bool)
JS_SetProperty(JSContext* cx, HandleObject obj, const char* name, HandleValue v)
{
JSAtom* atom = Atomize(cx, name, strlen(name));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return JS_SetPropertyById(cx, obj, id, v);
}
JS_PUBLIC_API(bool)
JS_SetUCProperty(JSContext* cx, HandleObject obj, const char16_t* name, size_t namelen,
HandleValue v)
{
JSAtom* atom = AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return JS_SetPropertyById(cx, obj, id, v);
}
static bool
SetElement(JSContext* cx, HandleObject obj, uint32_t index, HandleValue v)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, v);
RootedValue receiver(cx, ObjectValue(*obj));
ObjectOpResult ignored;
return SetElement(cx, obj, index, v, receiver, ignored);
}
JS_PUBLIC_API(bool)
JS_SetElement(JSContext* cx, HandleObject obj, uint32_t index, HandleValue v)
{
return SetElement(cx, obj, index, v);
}
JS_PUBLIC_API(bool)
JS_SetElement(JSContext* cx, HandleObject obj, uint32_t index, HandleObject v)
{
RootedValue value(cx, ObjectOrNullValue(v));
return SetElement(cx, obj, index, value);
}
JS_PUBLIC_API(bool)
JS_SetElement(JSContext* cx, HandleObject obj, uint32_t index, HandleString v)
{
RootedValue value(cx, StringValue(v));
return SetElement(cx, obj, index, value);
}
JS_PUBLIC_API(bool)
JS_SetElement(JSContext* cx, HandleObject obj, uint32_t index, int32_t v)
{
RootedValue value(cx, NumberValue(v));
return SetElement(cx, obj, index, value);
}
JS_PUBLIC_API(bool)
JS_SetElement(JSContext* cx, HandleObject obj, uint32_t index, uint32_t v)
{
RootedValue value(cx, NumberValue(v));
return SetElement(cx, obj, index, value);
}
JS_PUBLIC_API(bool)
JS_SetElement(JSContext* cx, HandleObject obj, uint32_t index, double v)
{
RootedValue value(cx, NumberValue(v));
return SetElement(cx, obj, index, value);
}
JS_PUBLIC_API(bool)
JS_DeletePropertyById(JSContext* cx, HandleObject obj, HandleId id, ObjectOpResult& result)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
return DeleteProperty(cx, obj, id, result);
}
JS_PUBLIC_API(bool)
JS_DeleteProperty(JSContext* cx, HandleObject obj, const char* name, ObjectOpResult& result)
{
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAtom* atom = Atomize(cx, name, strlen(name));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return DeleteProperty(cx, obj, id, result);
}
JS_PUBLIC_API(bool)
JS_DeleteUCProperty(JSContext* cx, HandleObject obj, const char16_t* name, size_t namelen,
ObjectOpResult& result)
{
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAtom* atom = AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return DeleteProperty(cx, obj, id, result);
}
JS_PUBLIC_API(bool)
JS_DeleteElement(JSContext* cx, HandleObject obj, uint32_t index, ObjectOpResult& result)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
return DeleteElement(cx, obj, index, result);
}
JS_PUBLIC_API(bool)
JS_DeletePropertyById(JSContext* cx, HandleObject obj, HandleId id)
{
ObjectOpResult ignored;
return JS_DeletePropertyById(cx, obj, id, ignored);
}
JS_PUBLIC_API(bool)
JS_DeleteProperty(JSContext* cx, HandleObject obj, const char* name)
{
ObjectOpResult ignored;
return JS_DeleteProperty(cx, obj, name, ignored);
}
JS_PUBLIC_API(bool)
JS_DeleteElement(JSContext* cx, HandleObject obj, uint32_t index)
{
ObjectOpResult ignored;
return JS_DeleteElement(cx, obj, index, ignored);
}
JS_PUBLIC_API(bool)
JS_Enumerate(JSContext* cx, HandleObject obj, JS::MutableHandle<IdVector> props)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
MOZ_ASSERT(props.empty());
AutoIdVector ids(cx);
if (!GetPropertyKeys(cx, obj, JSITER_OWNONLY, &ids))
return false;
return props.append(ids.begin(), ids.end());
}
JS_PUBLIC_API(bool)
JS::IsCallable(JSObject* obj)
{
return obj->isCallable();
}
JS_PUBLIC_API(bool)
JS::IsConstructor(JSObject* obj)
{
return obj->isConstructor();
}
struct AutoLastFrameCheck
{
explicit AutoLastFrameCheck(JSContext* cx
MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
: cx(cx)
{
MOZ_ASSERT(cx);
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
}
~AutoLastFrameCheck() {
if (cx->isExceptionPending() &&
!JS_IsRunning(cx) &&
(!cx->options().dontReportUncaught() && !cx->options().autoJSAPIOwnsErrorReporting())) {
ReportUncaughtException(cx);
}
}
private:
JSContext* cx;
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
};
JS_PUBLIC_API(bool)
JS_CallFunctionValue(JSContext* cx, HandleObject obj, HandleValue fval, const HandleValueArray& args,
MutableHandleValue rval)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, fval, args);
AutoLastFrameCheck lfc(cx);
return Invoke(cx, ObjectOrNullValue(obj), fval, args.length(), args.begin(), rval);
}
JS_PUBLIC_API(bool)
JS_CallFunction(JSContext* cx, HandleObject obj, HandleFunction fun, const HandleValueArray& args,
MutableHandleValue rval)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, fun, args);
AutoLastFrameCheck lfc(cx);
return Invoke(cx, ObjectOrNullValue(obj), ObjectValue(*fun), args.length(), args.begin(), rval);
}
JS_PUBLIC_API(bool)
JS_CallFunctionName(JSContext* cx, HandleObject obj, const char* name, const HandleValueArray& args,
MutableHandleValue rval)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, args);
AutoLastFrameCheck lfc(cx);
JSAtom* atom = Atomize(cx, name, strlen(name));
if (!atom)
return false;
RootedValue v(cx);
RootedId id(cx, AtomToId(atom));
if (!GetProperty(cx, obj, obj, id, &v))
return false;
return Invoke(cx, ObjectOrNullValue(obj), v, args.length(), args.begin(), rval);
}
JS_PUBLIC_API(bool)
JS::Call(JSContext* cx, HandleValue thisv, HandleValue fval, const JS::HandleValueArray& args,
MutableHandleValue rval)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, thisv, fval, args);
AutoLastFrameCheck lfc(cx);
return Invoke(cx, thisv, fval, args.length(), args.begin(), rval);
}
JS_PUBLIC_API(bool)
JS::Construct(JSContext* cx, HandleValue fval, HandleObject newTarget, const JS::HandleValueArray& args,
MutableHandleObject objp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, fval, newTarget, args);
AutoLastFrameCheck lfc(cx);
if (!IsConstructor(fval)) {
ReportValueError(cx, JSMSG_NOT_CONSTRUCTOR, JSDVG_IGNORE_STACK, fval, nullptr);
return false;
}
RootedValue newTargetVal(cx, ObjectValue(*newTarget));
if (!IsConstructor(newTargetVal)) {
ReportValueError(cx, JSMSG_NOT_CONSTRUCTOR, JSDVG_IGNORE_STACK, newTargetVal, nullptr);
return false;
}
ConstructArgs cargs(cx);
if (!FillArgumentsFromArraylike(cx, cargs, args))
return false;
return js::Construct(cx, fval, cargs, newTargetVal, objp);
}
JS_PUBLIC_API(bool)
JS::Construct(JSContext* cx, HandleValue fval, const JS::HandleValueArray& args,
MutableHandleObject objp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, fval, args);
AutoLastFrameCheck lfc(cx);
if (!IsConstructor(fval)) {
ReportValueError(cx, JSMSG_NOT_CONSTRUCTOR, JSDVG_IGNORE_STACK, fval, nullptr);
return false;
}
ConstructArgs cargs(cx);
if (!FillArgumentsFromArraylike(cx, cargs, args))
return false;
return js::Construct(cx, fval, cargs, fval, objp);
}
/* * */
JS_PUBLIC_API(bool)
JS_AlreadyHasOwnPropertyById(JSContext* cx, HandleObject obj, HandleId id, bool* foundp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
if (!obj->isNative())
return js::HasOwnProperty(cx, obj, id, foundp);
RootedNativeObject nativeObj(cx, &obj->as<NativeObject>());
RootedShape prop(cx);
NativeLookupOwnPropertyNoResolve(cx, nativeObj, id, &prop);
*foundp = !!prop;
return true;
}
JS_PUBLIC_API(bool)
JS_AlreadyHasOwnProperty(JSContext* cx, HandleObject obj, const char* name, bool* foundp)
{
JSAtom* atom = Atomize(cx, name, strlen(name));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return JS_AlreadyHasOwnPropertyById(cx, obj, id, foundp);
}
JS_PUBLIC_API(bool)
JS_AlreadyHasOwnUCProperty(JSContext* cx, HandleObject obj, const char16_t* name, size_t namelen,
bool* foundp)
{
JSAtom* atom = AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return JS_AlreadyHasOwnPropertyById(cx, obj, id, foundp);
}
JS_PUBLIC_API(bool)
JS_AlreadyHasOwnElement(JSContext* cx, HandleObject obj, uint32_t index, bool* foundp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedId id(cx);
if (!IndexToId(cx, index, &id))
return false;
return JS_AlreadyHasOwnPropertyById(cx, obj, id, foundp);
}
JS_PUBLIC_API(bool)
JS_FreezeObject(JSContext* cx, HandleObject obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
return FreezeObject(cx, obj);
}
JS_PUBLIC_API(bool)
JS_DeepFreezeObject(JSContext* cx, HandleObject obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
/* Assume that non-extensible objects are already deep-frozen, to avoid divergence. */
bool extensible;
if (!IsExtensible(cx, obj, &extensible))
return false;
if (!extensible)
return true;
if (!FreezeObject(cx, obj))
return false;
/* Walk slots in obj and if any value is a non-null object, seal it. */
if (obj->isNative()) {
for (uint32_t i = 0, n = obj->as<NativeObject>().slotSpan(); i < n; ++i) {
const Value& v = obj->as<NativeObject>().getSlot(i);
if (v.isPrimitive())
continue;
RootedObject obj(cx, &v.toObject());
if (!JS_DeepFreezeObject(cx, obj))
return false;
}
}
return true;
}
static bool
DefineSelfHostedProperty(JSContext* cx, HandleObject obj, HandleId id,
const char* getterName, const char* setterName,
unsigned attrs, unsigned flags)
{
JSAtom* getterNameAtom = Atomize(cx, getterName, strlen(getterName));
if (!getterNameAtom)
return false;
RootedPropertyName getterNameName(cx, getterNameAtom->asPropertyName());
RootedAtom name(cx, IdToFunctionName(cx, id));
if (!name)
return false;
RootedValue getterValue(cx);
if (!GlobalObject::getSelfHostedFunction(cx, cx->global(), getterNameName, name, 0,
&getterValue))
{
return false;
}
MOZ_ASSERT(getterValue.isObject() && getterValue.toObject().is<JSFunction>());
RootedFunction getterFunc(cx, &getterValue.toObject().as<JSFunction>());
JSNative getterOp = JS_DATA_TO_FUNC_PTR(JSNative, getterFunc.get());
RootedFunction setterFunc(cx);
if (setterName) {
JSAtom* setterNameAtom = Atomize(cx, setterName, strlen(setterName));
if (!setterNameAtom)
return false;
RootedPropertyName setterNameName(cx, setterNameAtom->asPropertyName());
RootedValue setterValue(cx);
if (!GlobalObject::getSelfHostedFunction(cx, cx->global(), setterNameName, name, 0,
&setterValue))
{
return false;
}
MOZ_ASSERT(setterValue.isObject() && setterValue.toObject().is<JSFunction>());
setterFunc = &setterValue.toObject().as<JSFunction>();
}
JSNative setterOp = JS_DATA_TO_FUNC_PTR(JSNative, setterFunc.get());
return DefinePropertyById(cx, obj, id, JS::UndefinedHandleValue,
NativeOpWrapper(getterOp), NativeOpWrapper(setterOp),
attrs, flags);
}
JS_PUBLIC_API(JSObject*)
JS_DefineObject(JSContext* cx, HandleObject obj, const char* name, const JSClass* jsclasp,
unsigned attrs)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
const Class* clasp = Valueify(jsclasp);
if (!clasp)
clasp = &PlainObject::class_; /* default class is Object */
RootedObject nobj(cx, NewObjectWithClassProto(cx, clasp, nullptr));
if (!nobj)
return nullptr;
RootedValue nobjValue(cx, ObjectValue(*nobj));
if (!DefineProperty(cx, obj, name, nobjValue, NativeOpWrapper(nullptr), NativeOpWrapper(nullptr),
attrs, 0)) {
return nullptr;
}
return nobj;
}
static inline Value
ValueFromScalar(double x)
{
return DoubleValue(x);
}
static inline Value
ValueFromScalar(int32_t x)
{
return Int32Value(x);
}
template<typename T>
static bool
DefineConstScalar(JSContext* cx, HandleObject obj, const JSConstScalarSpec<T>* cds)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSNativeWrapper noget = NativeOpWrapper(nullptr);
JSNativeWrapper noset = NativeOpWrapper(nullptr);
unsigned attrs = JSPROP_READONLY | JSPROP_PERMANENT;
for (; cds->name; cds++) {
RootedValue value(cx, ValueFromScalar(cds->val));
if (!DefineProperty(cx, obj, cds->name, value, noget, noset, attrs, 0))
return false;
}
return true;
}
JS_PUBLIC_API(bool)
JS_DefineConstDoubles(JSContext* cx, HandleObject obj, const JSConstDoubleSpec* cds)
{
return DefineConstScalar(cx, obj, cds);
}
JS_PUBLIC_API(bool)
JS_DefineConstIntegers(JSContext* cx, HandleObject obj, const JSConstIntegerSpec* cis)
{
return DefineConstScalar(cx, obj, cis);
}
static JS::SymbolCode
PropertySpecNameToSymbolCode(const char* name)
{
MOZ_ASSERT(JS::PropertySpecNameIsSymbol(name));
uintptr_t u = reinterpret_cast<uintptr_t>(name);
return JS::SymbolCode(u - 1);
}
bool
PropertySpecNameToId(JSContext* cx, const char* name, MutableHandleId id,
js::PinningBehavior pin = js::DoNotPinAtom)
{
if (JS::PropertySpecNameIsSymbol(name)) {
JS::SymbolCode which = PropertySpecNameToSymbolCode(name);
id.set(SYMBOL_TO_JSID(cx->wellKnownSymbols().get(which)));
} else {
JSAtom* atom = Atomize(cx, name, strlen(name), pin);
if (!atom)
return false;
id.set(AtomToId(atom));
}
return true;
}
JS_PUBLIC_API(bool)
JS::PropertySpecNameToPermanentId(JSContext* cx, const char* name, jsid* idp)
{
// We are calling fromMarkedLocation(idp) even though idp points to a
// location that will never be marked. This is OK because the whole point
// of this API is to populate *idp with a jsid that does not need to be
// marked.
return PropertySpecNameToId(cx, name, MutableHandleId::fromMarkedLocation(idp),
js::PinAtom);
}
JS_PUBLIC_API(bool)
JS_DefineProperties(JSContext* cx, HandleObject obj, const JSPropertySpec* ps)
{
RootedId id(cx);
for (; ps->name; ps++) {
if (!PropertySpecNameToId(cx, ps->name, &id))
return false;
if (ps->isSelfHosted()) {
if (!DefineSelfHostedProperty(cx, obj, id,
ps->getter.selfHosted.funname,
ps->setter.selfHosted.funname,
ps->flags, 0))
{
return false;
}
} else {
if (!DefinePropertyById(cx, obj, id, JS::UndefinedHandleValue,
ps->getter.native, ps->setter.native, ps->flags, 0))
{
return false;
}
}
}
return true;
}
JS_PUBLIC_API(bool)
JS::ObjectToCompletePropertyDescriptor(JSContext* cx,
HandleObject obj,
HandleValue descObj,
MutableHandle<PropertyDescriptor> desc)
{
if (!ToPropertyDescriptor(cx, descObj, true, desc))
return false;
CompletePropertyDescriptor(desc);
desc.object().set(obj);
return true;
}
JS_PUBLIC_API(void)
JS_SetAllNonReservedSlotsToUndefined(JSContext* cx, JSObject* objArg)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
if (!obj->isNative())
return;
const Class* clasp = obj->getClass();
unsigned numReserved = JSCLASS_RESERVED_SLOTS(clasp);
unsigned numSlots = obj->as<NativeObject>().slotSpan();
for (unsigned i = numReserved; i < numSlots; i++)
obj->as<NativeObject>().setSlot(i, UndefinedValue());
}
JS_PUBLIC_API(Value)
JS_GetReservedSlot(JSObject* obj, uint32_t index)
{
return obj->as<NativeObject>().getReservedSlot(index);
}
JS_PUBLIC_API(void)
JS_SetReservedSlot(JSObject* obj, uint32_t index, Value value)
{
obj->as<NativeObject>().setReservedSlot(index, value);
}
JS_PUBLIC_API(JSObject*)
JS_NewArrayObject(JSContext* cx, const JS::HandleValueArray& contents)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, contents);
return NewDenseCopiedArray(cx, contents.length(), contents.begin());
}
JS_PUBLIC_API(JSObject*)
JS_NewArrayObject(JSContext* cx, size_t length)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return NewDenseFullyAllocatedArray(cx, length);
}
JS_PUBLIC_API(bool)
JS_IsArrayObject(JSContext* cx, JS::HandleObject obj, bool* isArray)
{
assertSameCompartment(cx, obj);
ESClassValue cls;
if (!GetBuiltinClass(cx, obj, &cls))
return false;
*isArray = cls == ESClass_Array;
return true;
}
JS_PUBLIC_API(bool)
JS_IsArrayObject(JSContext* cx, JS::HandleValue value, bool* isArray)
{
if (!value.isObject()) {
*isArray = false;
return true;
}
RootedObject obj(cx, &value.toObject());
return JS_IsArrayObject(cx, obj, isArray);
}
JS_PUBLIC_API(bool)
JS_GetArrayLength(JSContext* cx, HandleObject obj, uint32_t* lengthp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
return GetLengthProperty(cx, obj, lengthp);
}
JS_PUBLIC_API(bool)
JS_SetArrayLength(JSContext* cx, HandleObject obj, uint32_t length)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
return SetLengthProperty(cx, obj, length);
}
JS_PUBLIC_API(void)
JS_HoldPrincipals(JSPrincipals* principals)
{
++principals->refcount;
}
JS_PUBLIC_API(void)
JS_DropPrincipals(JSRuntime* rt, JSPrincipals* principals)
{
int rc = --principals->refcount;
if (rc == 0)
rt->destroyPrincipals(principals);
}
JS_PUBLIC_API(void)
JS_SetSecurityCallbacks(JSRuntime* rt, const JSSecurityCallbacks* scb)
{
MOZ_ASSERT(scb != &NullSecurityCallbacks);
rt->securityCallbacks = scb ? scb : &NullSecurityCallbacks;
}
JS_PUBLIC_API(const JSSecurityCallbacks*)
JS_GetSecurityCallbacks(JSRuntime* rt)
{
return (rt->securityCallbacks != &NullSecurityCallbacks) ? rt->securityCallbacks : nullptr;
}
JS_PUBLIC_API(void)
JS_SetTrustedPrincipals(JSRuntime* rt, JSPrincipals* prin)
{
rt->setTrustedPrincipals(prin);
}
extern JS_PUBLIC_API(void)
JS_InitDestroyPrincipalsCallback(JSRuntime* rt, JSDestroyPrincipalsOp destroyPrincipals)
{
MOZ_ASSERT(destroyPrincipals);
MOZ_ASSERT(!rt->destroyPrincipals);
rt->destroyPrincipals = destroyPrincipals;
}
extern JS_PUBLIC_API(void)
JS_InitReadPrincipalsCallback(JSRuntime* rt, JSReadPrincipalsOp read)
{
MOZ_ASSERT(read);
MOZ_ASSERT(!rt->readPrincipals);
rt->readPrincipals = read;
}
JS_PUBLIC_API(JSFunction*)
JS_NewFunction(JSContext* cx, JSNative native, unsigned nargs, unsigned flags,
const char* name)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedAtom atom(cx);
if (name) {
atom = Atomize(cx, name, strlen(name));
if (!atom)
return nullptr;
}
return (flags & JSFUN_CONSTRUCTOR)
? NewNativeConstructor(cx, native, nargs, atom)
: NewNativeFunction(cx, native, nargs, atom);
}
JS_PUBLIC_API(JSFunction*)
JS::GetSelfHostedFunction(JSContext* cx, const char* selfHostedName, HandleId id, unsigned nargs)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedAtom name(cx, IdToFunctionName(cx, id));
if (!name)
return nullptr;
JSAtom* shAtom = Atomize(cx, selfHostedName, strlen(selfHostedName));
if (!shAtom)
return nullptr;
RootedPropertyName shName(cx, shAtom->asPropertyName());
RootedValue funVal(cx);
if (!GlobalObject::getSelfHostedFunction(cx, cx->global(), shName, name, nargs, &funVal))
return nullptr;
return &funVal.toObject().as<JSFunction>();
}
JS_PUBLIC_API(JSFunction*)
JS::NewFunctionFromSpec(JSContext* cx, const JSFunctionSpec* fs, HandleId id)
{
// Delay cloning self-hosted functions until they are called. This is
// achieved by passing DefineFunction a nullptr JSNative which produces an
// interpreted JSFunction where !hasScript. Interpreted call paths then
// call InitializeLazyFunctionScript if !hasScript.
if (fs->selfHostedName) {
MOZ_ASSERT(!fs->call.op);
MOZ_ASSERT(!fs->call.info);
JSAtom* shAtom = Atomize(cx, fs->selfHostedName, strlen(fs->selfHostedName));
if (!shAtom)
return nullptr;
RootedPropertyName shName(cx, shAtom->asPropertyName());
RootedAtom name(cx, IdToFunctionName(cx, id));
if (!name)
return nullptr;
RootedValue funVal(cx);
if (!GlobalObject::getSelfHostedFunction(cx, cx->global(), shName, name, fs->nargs,
&funVal))
{
return nullptr;
}
JSFunction* fun = &funVal.toObject().as<JSFunction>();
if (fs->flags & JSFUN_HAS_REST)
fun->setHasRest();
return fun;
}
RootedAtom atom(cx, IdToFunctionName(cx, id));
if (!atom)
return nullptr;
JSFunction* fun;
if (!fs->call.op)
fun = NewScriptedFunction(cx, fs->nargs, JSFunction::INTERPRETED_LAZY, atom);
else if (fs->flags & JSFUN_CONSTRUCTOR)
fun = NewNativeConstructor(cx, fs->call.op, fs->nargs, atom);
else
fun = NewNativeFunction(cx, fs->call.op, fs->nargs, atom);
if (!fun)
return nullptr;
if (fs->call.info)
fun->setJitInfo(fs->call.info);
return fun;
}
static bool
CreateNonSyntacticScopeChain(JSContext* cx, AutoObjectVector& scopeChain,
MutableHandleObject dynamicScopeObj,
MutableHandle<StaticScope*> staticScopeObj)
{
Rooted<ClonedBlockObject*> globalLexical(cx, &cx->global()->lexicalScope());
if (!js::CreateScopeObjectsForScopeChain(cx, scopeChain, globalLexical, dynamicScopeObj))
return false;
staticScopeObj.set(&globalLexical->staticBlock());
if (!scopeChain.empty()) {
staticScopeObj.set(StaticNonSyntacticScope::create(cx, staticScopeObj));
if (!staticScopeObj)
return false;
// The XPConnect subscript loader, which may pass in its own dynamic
// scopes to load scripts in, expects the dynamic scope chain to be
// the holder of "var" declarations. In SpiderMonkey, such objects are
// called "qualified varobjs", the "qualified" part meaning the
// declaration was qualified by "var". There is only sadness.
//
// See JSObject::isQualifiedVarObj.
if (!dynamicScopeObj->setQualifiedVarObj(cx))
return false;
// Also get a non-syntactic lexical scope to capture 'let' and 'const'
// bindings. To persist lexical bindings, we have a 1-1 mapping with
// the final unwrapped dynamic scope object (the scope that stores the
// 'var' bindings) and the lexical scope.
//
// TODOshu: disallow the subscript loader from using non-distinguished
// objects as dynamic scopes.
dynamicScopeObj.set(
cx->compartment()->getOrCreateNonSyntacticLexicalScope(cx, staticScopeObj,
dynamicScopeObj));
if (!dynamicScopeObj)
return false;
}
return true;
}
static bool
IsFunctionCloneable(HandleFunction fun)
{
if (!fun->isInterpreted())
return true;
// If a function was compiled to be lexically nested inside some other
// script, we cannot clone it without breaking the compiler's assumptions.
if (JSObject* scope = fun->nonLazyScript()->enclosingStaticScope()) {
// If the script is directly under the global scope, we can clone it.
if (IsStaticGlobalLexicalScope(scope))
return true;
// If the script already deals with non-syntactic scopes, we can clone
// it.
if (scope->is<StaticNonSyntacticScope>())
return true;
// 'eval' scopes are always scoped immediately under a non-extensible
// lexical scope.
if (scope->is<StaticBlockScope>()) {
StaticBlockScope& block = scope->as<StaticBlockScope>();
if (block.needsClone())
return false;
JSObject* enclosing = block.enclosingStaticScope();
// If the script is an indirect eval that is immediately scoped
// under the global, we can clone it.
if (enclosing->is<StaticEvalScope>())
return !enclosing->as<StaticEvalScope>().isNonGlobal();
}
// Any other enclosing static scope (e.g., function, block) cannot be
// cloned.
return false;
}
return true;
}
static JSObject*
CloneFunctionObject(JSContext* cx, HandleObject funobj, HandleObject dynamicScope,
Handle<StaticScope*> staticScope)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, dynamicScope);
MOZ_ASSERT(dynamicScope);
// Note that funobj can be in a different compartment.
if (!funobj->is<JSFunction>()) {
AutoCompartment ac(cx, funobj);
RootedValue v(cx, ObjectValue(*funobj));
ReportIsNotFunction(cx, v);
return nullptr;
}
RootedFunction fun(cx, &funobj->as<JSFunction>());
if (fun->isInterpretedLazy()) {
AutoCompartment ac(cx, funobj);
if (!fun->getOrCreateScript(cx))
return nullptr;
}
if (!IsFunctionCloneable(fun)) {
JS_ReportErrorNumber(cx, GetErrorMessage, nullptr, JSMSG_BAD_CLONE_FUNOBJ_SCOPE);
return nullptr;
}
if (fun->isBoundFunction()) {
JS_ReportErrorNumber(cx, GetErrorMessage, nullptr, JSMSG_CANT_CLONE_OBJECT);
return nullptr;
}
if (IsAsmJSModule(fun)) {
JS_ReportErrorNumber(cx, GetErrorMessage, nullptr, JSMSG_CANT_CLONE_OBJECT);
return nullptr;
}
if (CanReuseScriptForClone(cx->compartment(), fun, dynamicScope)) {
// If the script is to be reused, either the script can already handle
// non-syntactic scopes, or there is only the standard global lexical
// scope.
#ifdef DEBUG
// Fail here if we OOM during debug asserting.
// CloneFunctionReuseScript will delazify the script anyways, so we
// are not creating an extra failure condition for DEBUG builds.
if (!fun->getOrCreateScript(cx))
return nullptr;
MOZ_ASSERT(IsStaticGlobalLexicalScope(staticScope) ||
fun->nonLazyScript()->hasNonSyntacticScope());
#endif
return CloneFunctionReuseScript(cx, fun, dynamicScope, fun->getAllocKind());
}
JSFunction* clone = CloneFunctionAndScript(cx, fun, dynamicScope, staticScope,
fun->getAllocKind());
#ifdef DEBUG
// The cloned function should itself be cloneable.
RootedFunction cloneRoot(cx, clone);
MOZ_ASSERT_IF(cloneRoot, IsFunctionCloneable(cloneRoot));
#endif
return clone;
}
JS_PUBLIC_API(JSObject*)
JS::CloneFunctionObject(JSContext* cx, HandleObject funobj)
{
Rooted<ClonedBlockObject*> globalLexical(cx, &cx->global()->lexicalScope());
Rooted<StaticScope*> staticLexical(cx, &globalLexical->staticBlock());
return CloneFunctionObject(cx, funobj, globalLexical, staticLexical);
}
extern JS_PUBLIC_API(JSObject*)
JS::CloneFunctionObject(JSContext* cx, HandleObject funobj, AutoObjectVector& scopeChain)
{
RootedObject dynamicScope(cx);
Rooted<StaticScope*> staticScope(cx);
if (!CreateNonSyntacticScopeChain(cx, scopeChain, &dynamicScope, &staticScope))
return nullptr;
return CloneFunctionObject(cx, funobj, dynamicScope, staticScope);
}
JS_PUBLIC_API(JSObject*)
JS_GetFunctionObject(JSFunction* fun)
{
return fun;
}
JS_PUBLIC_API(JSString*)
JS_GetFunctionId(JSFunction* fun)
{
return fun->atom();
}
JS_PUBLIC_API(JSString*)
JS_GetFunctionDisplayId(JSFunction* fun)
{
return fun->displayAtom();
}
JS_PUBLIC_API(uint16_t)
JS_GetFunctionArity(JSFunction* fun)
{
return fun->nargs();
}
JS_PUBLIC_API(bool)
JS_ObjectIsFunction(JSContext* cx, JSObject* obj)
{
return obj->is<JSFunction>();
}
JS_PUBLIC_API(bool)
JS_IsNativeFunction(JSObject* funobj, JSNative call)
{
if (!funobj->is<JSFunction>())
return false;
JSFunction* fun = &funobj->as<JSFunction>();
return fun->isNative() && fun->native() == call;
}
extern JS_PUBLIC_API(bool)
JS_IsConstructor(JSFunction* fun)
{
return fun->isConstructor();
}
JS_PUBLIC_API(bool)
JS_DefineFunctions(JSContext* cx, HandleObject obj, const JSFunctionSpec* fs)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
return DefineFunctions(cx, obj, fs, NotIntrinsic);
}
JS_PUBLIC_API(JSFunction*)
JS_DefineFunction(JSContext* cx, HandleObject obj, const char* name, JSNative call,
unsigned nargs, unsigned attrs)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAtom* atom = Atomize(cx, name, strlen(name));
if (!atom)
return nullptr;
Rooted<jsid> id(cx, AtomToId(atom));
return DefineFunction(cx, obj, id, call, nargs, attrs);
}
JS_PUBLIC_API(JSFunction*)
JS_DefineUCFunction(JSContext* cx, HandleObject obj,
const char16_t* name, size_t namelen, JSNative call,
unsigned nargs, unsigned attrs)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAtom* atom = AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
if (!atom)
return nullptr;
Rooted<jsid> id(cx, AtomToId(atom));
return DefineFunction(cx, obj, id, call, nargs, attrs);
}
extern JS_PUBLIC_API(JSFunction*)
JS_DefineFunctionById(JSContext* cx, HandleObject obj, HandleId id, JSNative call,
unsigned nargs, unsigned attrs)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
return DefineFunction(cx, obj, id, call, nargs, attrs);
}
/* Use the fastest available getc. */
#if defined(HAVE_GETC_UNLOCKED)
# define fast_getc getc_unlocked
#elif defined(HAVE__GETC_NOLOCK)
# define fast_getc _getc_nolock
#else
# define fast_getc getc
#endif
typedef Vector<char, 8, TempAllocPolicy> FileContents;
static bool
ReadCompleteFile(JSContext* cx, FILE* fp, FileContents& buffer)
{
/* Get the complete length of the file, if possible. */
struct stat st;
int ok = fstat(fileno(fp), &st);
if (ok != 0)
return false;
if (st.st_size > 0) {
if (!buffer.reserve(st.st_size))
return false;
}
// Read in the whole file. Note that we can't assume the data's length
// is actually st.st_size, because 1) some files lie about their size
// (/dev/zero and /dev/random), and 2) reading files in text mode on
// Windows collapses "\r\n" pairs to single \n characters.
for (;;) {
int c = fast_getc(fp);
if (c == EOF)
break;
if (!buffer.append(c))
return false;
}
return true;
}
namespace {
class AutoFile
{
FILE* fp_;
public:
AutoFile()
: fp_(nullptr)
{}
~AutoFile()
{
if (fp_ && fp_ != stdin)
fclose(fp_);
}
FILE* fp() const { return fp_; }
bool open(JSContext* cx, const char* filename);
bool readAll(JSContext* cx, FileContents& buffer)
{
MOZ_ASSERT(fp_);
return ReadCompleteFile(cx, fp_, buffer);
}
};
} /* anonymous namespace */
/*
* Open a source file for reading. Supports "-" and nullptr to mean stdin. The
* return value must be fclosed unless it is stdin.
*/
bool
AutoFile::open(JSContext* cx, const char* filename)
{
if (!filename || strcmp(filename, "-") == 0) {
fp_ = stdin;
} else {
fp_ = fopen(filename, "r");
if (!fp_) {
JS_ReportErrorNumber(cx, GetErrorMessage, nullptr, JSMSG_CANT_OPEN,
filename, "No such file or directory");
return false;
}
}
return true;
}
void
JS::TransitiveCompileOptions::copyPODTransitiveOptions(const TransitiveCompileOptions& rhs)
{
mutedErrors_ = rhs.mutedErrors_;
version = rhs.version;
versionSet = rhs.versionSet;
utf8 = rhs.utf8;
selfHostingMode = rhs.selfHostingMode;
canLazilyParse = rhs.canLazilyParse;
strictOption = rhs.strictOption;
extraWarningsOption = rhs.extraWarningsOption;
werrorOption = rhs.werrorOption;
asmJSOption = rhs.asmJSOption;
throwOnAsmJSValidationFailureOption = rhs.throwOnAsmJSValidationFailureOption;
forceAsync = rhs.forceAsync;
installedFile = rhs.installedFile;
sourceIsLazy = rhs.sourceIsLazy;
introductionType = rhs.introductionType;
introductionLineno = rhs.introductionLineno;
introductionOffset = rhs.introductionOffset;
hasIntroductionInfo = rhs.hasIntroductionInfo;
};
void
JS::ReadOnlyCompileOptions::copyPODOptions(const ReadOnlyCompileOptions& rhs)
{
copyPODTransitiveOptions(rhs);
lineno = rhs.lineno;
column = rhs.column;
isRunOnce = rhs.isRunOnce;
forEval = rhs.forEval;
noScriptRval = rhs.noScriptRval;
}
JS::OwningCompileOptions::OwningCompileOptions(JSContext* cx)
: ReadOnlyCompileOptions(),
runtime(GetRuntime(cx)),
elementRoot(cx),
elementAttributeNameRoot(cx),
introductionScriptRoot(cx)
{
}
JS::OwningCompileOptions::~OwningCompileOptions()
{
// OwningCompileOptions always owns these, so these casts are okay.
js_free(const_cast<char*>(filename_));
js_free(const_cast<char16_t*>(sourceMapURL_));
js_free(const_cast<char*>(introducerFilename_));
}
bool
JS::OwningCompileOptions::copy(JSContext* cx, const ReadOnlyCompileOptions& rhs)
{
copyPODOptions(rhs);
setElement(rhs.element());
setElementAttributeName(rhs.elementAttributeName());
setIntroductionScript(rhs.introductionScript());
return setFileAndLine(cx, rhs.filename(), rhs.lineno) &&
setSourceMapURL(cx, rhs.sourceMapURL()) &&
setIntroducerFilename(cx, rhs.introducerFilename());
}
bool
JS::OwningCompileOptions::setFile(JSContext* cx, const char* f)
{
char* copy = nullptr;
if (f) {
copy = JS_strdup(cx, f);
if (!copy)
return false;
}
// OwningCompileOptions always owns filename_, so this cast is okay.
js_free(const_cast<char*>(filename_));
filename_ = copy;
return true;
}
bool
JS::OwningCompileOptions::setFileAndLine(JSContext* cx, const char* f, unsigned l)
{
if (!setFile(cx, f))
return false;
lineno = l;
return true;
}
bool
JS::OwningCompileOptions::setSourceMapURL(JSContext* cx, const char16_t* s)
{
UniqueTwoByteChars copy;
if (s) {
copy = DuplicateString(cx, s);
if (!copy)
return false;
}
// OwningCompileOptions always owns sourceMapURL_, so this cast is okay.
js_free(const_cast<char16_t*>(sourceMapURL_));
sourceMapURL_ = copy.release();
return true;
}
bool
JS::OwningCompileOptions::setIntroducerFilename(JSContext* cx, const char* s)
{
char* copy = nullptr;
if (s) {
copy = JS_strdup(cx, s);
if (!copy)
return false;
}
// OwningCompileOptions always owns introducerFilename_, so this cast is okay.
js_free(const_cast<char*>(introducerFilename_));
introducerFilename_ = copy;
return true;
}
JS::CompileOptions::CompileOptions(JSContext* cx, JSVersion version)
: ReadOnlyCompileOptions(), elementRoot(cx), elementAttributeNameRoot(cx),
introductionScriptRoot(cx)
{
this->version = (version != JSVERSION_UNKNOWN) ? version : cx->findVersion();
strictOption = cx->runtime()->options().strictMode();
extraWarningsOption = cx->compartment()->behaviors().extraWarnings(cx);
werrorOption = cx->runtime()->options().werror();
if (!cx->runtime()->options().asmJS())
asmJSOption = AsmJSOption::Disabled;
else if (cx->compartment()->debuggerObservesAsmJS())
asmJSOption = AsmJSOption::DisabledByDebugger;
else
asmJSOption = AsmJSOption::Enabled;
throwOnAsmJSValidationFailureOption = cx->runtime()->options().throwOnAsmJSValidationFailure();
}
enum SyntacticScopeOption { HasSyntacticScope, HasNonSyntacticScope };
static bool
Compile(JSContext* cx, const ReadOnlyCompileOptions& options, SyntacticScopeOption scopeOption,
SourceBufferHolder& srcBuf, MutableHandleScript script)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
AutoLastFrameCheck lfc(cx);
Rooted<StaticScope*> staticScope(cx, &cx->global()->lexicalScope().staticBlock());
if (scopeOption == HasNonSyntacticScope) {
staticScope = StaticNonSyntacticScope::create(cx, staticScope);
if (!staticScope)
return false;
}
RootedObject globalLexical(cx, &cx->global()->lexicalScope());
script.set(frontend::CompileScript(cx, &cx->tempLifoAlloc(), globalLexical,
staticScope, nullptr, options, srcBuf));
return !!script;
}
static bool
Compile(JSContext* cx, const ReadOnlyCompileOptions& options, SyntacticScopeOption scopeOption,
const char16_t* chars, size_t length, MutableHandleScript script)
{
SourceBufferHolder srcBuf(chars, length, SourceBufferHolder::NoOwnership);
return ::Compile(cx, options, scopeOption, srcBuf, script);
}
static bool
Compile(JSContext* cx, const ReadOnlyCompileOptions& options, SyntacticScopeOption scopeOption,
const char* bytes, size_t length, MutableHandleScript script)
{
UniqueTwoByteChars chars;
if (options.utf8)
chars.reset(UTF8CharsToNewTwoByteCharsZ(cx, UTF8Chars(bytes, length), &length).get());
else
chars.reset(InflateString(cx, bytes, &length));
if (!chars)
return false;
return ::Compile(cx, options, scopeOption, chars.get(), length, script);
}
static bool
Compile(JSContext* cx, const ReadOnlyCompileOptions& options, SyntacticScopeOption scopeOption,
FILE* fp, MutableHandleScript script)
{
FileContents buffer(cx);
if (!ReadCompleteFile(cx, fp, buffer))
return false;
return ::Compile(cx, options, scopeOption, buffer.begin(), buffer.length(), script);
}
static bool
Compile(JSContext* cx, const ReadOnlyCompileOptions& optionsArg, SyntacticScopeOption scopeOption,
const char* filename, MutableHandleScript script)
{
AutoFile file;
if (!file.open(cx, filename))
return false;
CompileOptions options(cx, optionsArg);
options.setFileAndLine(filename, 1);
return ::Compile(cx, options, scopeOption, file.fp(), script);
}
bool
JS::Compile(JSContext* cx, const ReadOnlyCompileOptions& options,
SourceBufferHolder& srcBuf, JS::MutableHandleScript script)
{
return ::Compile(cx, options, HasSyntacticScope, srcBuf, script);
}
bool
JS::Compile(JSContext* cx, const ReadOnlyCompileOptions& options,
const char* bytes, size_t length, JS::MutableHandleScript script)
{
return ::Compile(cx, options, HasSyntacticScope, bytes, length, script);
}
bool
JS::Compile(JSContext* cx, const ReadOnlyCompileOptions& options,
const char16_t* chars, size_t length, JS::MutableHandleScript script)
{
return ::Compile(cx, options, HasSyntacticScope, chars, length, script);
}
bool
JS::Compile(JSContext* cx, const ReadOnlyCompileOptions& options,
FILE* file, JS::MutableHandleScript script)
{
return ::Compile(cx, options, HasSyntacticScope, file, script);
}
bool
JS::Compile(JSContext* cx, const ReadOnlyCompileOptions& options,
const char* filename, JS::MutableHandleScript script)
{
return ::Compile(cx, options, HasSyntacticScope, filename, script);
}
bool
JS::CompileForNonSyntacticScope(JSContext* cx, const ReadOnlyCompileOptions& options,
SourceBufferHolder& srcBuf, JS::MutableHandleScript script)
{
return ::Compile(cx, options, HasNonSyntacticScope, srcBuf, script);
}
bool
JS::CompileForNonSyntacticScope(JSContext* cx, const ReadOnlyCompileOptions& options,
const char* bytes, size_t length, JS::MutableHandleScript script)
{
return ::Compile(cx, options, HasNonSyntacticScope, bytes, length, script);
}
bool
JS::CompileForNonSyntacticScope(JSContext* cx, const ReadOnlyCompileOptions& options,
const char16_t* chars, size_t length,
JS::MutableHandleScript script)
{
return ::Compile(cx, options, HasNonSyntacticScope, chars, length, script);
}
bool
JS::CompileForNonSyntacticScope(JSContext* cx, const ReadOnlyCompileOptions& options,
FILE* file, JS::MutableHandleScript script)
{
return ::Compile(cx, options, HasNonSyntacticScope, file, script);
}
bool
JS::CompileForNonSyntacticScope(JSContext* cx, const ReadOnlyCompileOptions& options,
const char* filename, JS::MutableHandleScript script)
{
return ::Compile(cx, options, HasNonSyntacticScope, filename, script);
}
JS_PUBLIC_API(bool)
JS::CanCompileOffThread(JSContext* cx, const ReadOnlyCompileOptions& options, size_t length)
{
static const size_t TINY_LENGTH = 5 * 1000;
static const size_t HUGE_LENGTH = 100 * 1000;
// These are heuristics which the caller may choose to ignore (e.g., for
// testing purposes).
if (!options.forceAsync) {
// Compiling off the main thread inolves creating a new Zone and other
// significant overheads. Don't bother if the script is tiny.
if (length < TINY_LENGTH)
return false;
// If the parsing task would have to wait for GC to complete, it'll probably
// be faster to just start it synchronously on the main thread unless the
// script is huge.
if (OffThreadParsingMustWaitForGC(cx->runtime()) && length < HUGE_LENGTH)
return false;
}
return cx->runtime()->canUseParallelParsing() && CanUseExtraThreads();
}
JS_PUBLIC_API(bool)
JS::CompileOffThread(JSContext* cx, const ReadOnlyCompileOptions& options,
const char16_t* chars, size_t length,
OffThreadCompileCallback callback, void* callbackData)
{
MOZ_ASSERT(CanCompileOffThread(cx, options, length));
return StartOffThreadParseScript(cx, options, chars, length, callback, callbackData);
}
JS_PUBLIC_API(JSScript*)
JS::FinishOffThreadScript(JSContext* maybecx, JSRuntime* rt, void* token)
{
MOZ_ASSERT(CurrentThreadCanAccessRuntime(rt));
if (maybecx) {
RootedScript script(maybecx);
{
AutoLastFrameCheck lfc(maybecx);
script = HelperThreadState().finishScriptParseTask(maybecx, rt, token);
}
return script;
} else {
return HelperThreadState().finishScriptParseTask(maybecx, rt, token);
}
}
JS_PUBLIC_API(bool)
JS_CompileScript(JSContext* cx, const char* ascii, size_t length,
const JS::CompileOptions& options, MutableHandleScript script)
{
return Compile(cx, options, ascii, length, script);
}
JS_PUBLIC_API(bool)
JS_CompileUCScript(JSContext* cx, const char16_t* chars, size_t length,
const JS::CompileOptions& options, MutableHandleScript script)
{
return Compile(cx, options, chars, length, script);
}
JS_PUBLIC_API(bool)
JS_BufferIsCompilableUnit(JSContext* cx, HandleObject obj, const char* utf8, size_t length)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
cx->clearPendingException();
char16_t* chars = JS::UTF8CharsToNewTwoByteCharsZ(cx, JS::UTF8Chars(utf8, length), &length).get();
if (!chars)
return true;
// Return true on any out-of-memory error or non-EOF-related syntax error, so our
// caller doesn't try to collect more buffered source.
bool result = true;
CompileOptions options(cx);
Parser<frontend::FullParseHandler> parser(cx, &cx->tempLifoAlloc(),
options, chars, length,
/* foldConstants = */ true, nullptr, nullptr);
JSErrorReporter older = JS_SetErrorReporter(cx->runtime(), nullptr);
if (!parser.checkOptions() || !parser.parse()) {
// 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.
if (parser.isUnexpectedEOF())
result = false;
cx->clearPendingException();
}
JS_SetErrorReporter(cx->runtime(), older);
js_free(chars);
return result;
}
JS_PUBLIC_API(JSObject*)
JS_GetGlobalFromScript(JSScript* script)
{
MOZ_ASSERT(!script->isCachedEval());
return &script->global();
}
JS_PUBLIC_API(const char*)
JS_GetScriptFilename(JSScript* script)
{
// This is called from ThreadStackHelper which can be called from another
// thread or inside a signal hander, so we need to be careful in case a
// copmacting GC is currently moving things around.
return script->maybeForwardedFilename();
}
JS_PUBLIC_API(unsigned)
JS_GetScriptBaseLineNumber(JSContext* cx, JSScript* script)
{
return script->lineno();
}
JS_PUBLIC_API(JSScript*)
JS_GetFunctionScript(JSContext* cx, HandleFunction fun)
{
if (fun->isNative())
return nullptr;
if (fun->isInterpretedLazy()) {
AutoCompartment funCompartment(cx, fun);
JSScript* script = fun->getOrCreateScript(cx);
if (!script)
MOZ_CRASH();
return script;
}
return fun->nonLazyScript();
}
/*
* enclosingStaticScope is a static enclosing scope, if any (e.g. a
* StaticWithScope). If the enclosing scope is the global scope, this must be
* null.
*
* enclosingDynamicScope is a dynamic scope to use, if it's not the global.
*/
static bool
CompileFunction(JSContext* cx, const ReadOnlyCompileOptions& optionsArg,
const char* name, unsigned nargs, const char* const* argnames,
SourceBufferHolder& srcBuf,
HandleObject enclosingDynamicScope,
Handle<StaticScope*> enclosingStaticScope,
MutableHandleFunction fun)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, enclosingDynamicScope);
assertSameCompartment(cx, enclosingStaticScope);
RootedAtom funAtom(cx);
AutoLastFrameCheck lfc(cx);
if (name) {
funAtom = Atomize(cx, name, strlen(name));
if (!funAtom)
return false;
}
Rooted<PropertyNameVector> formals(cx, PropertyNameVector(cx));
for (unsigned i = 0; i < nargs; i++) {
RootedAtom argAtom(cx, Atomize(cx, argnames[i], strlen(argnames[i])));
if (!argAtom || !formals.append(argAtom->asPropertyName()))
return false;
}
fun.set(NewScriptedFunction(cx, 0, JSFunction::INTERPRETED_NORMAL, funAtom,
/* proto = */ nullptr,
gc::AllocKind::FUNCTION, TenuredObject,
enclosingDynamicScope));
if (!fun)
return false;
// Make sure the static scope chain matches up when we have a
// non-syntactic scope.
MOZ_ASSERT_IF(!IsGlobalLexicalScope(enclosingDynamicScope),
HasNonSyntacticStaticScopeChain(enclosingStaticScope));
if (!frontend::CompileFunctionBody(cx, fun, optionsArg, formals, srcBuf, enclosingStaticScope))
return false;
return true;
}
JS_PUBLIC_API(bool)
JS::CompileFunction(JSContext* cx, AutoObjectVector& scopeChain,
const ReadOnlyCompileOptions& options,
const char* name, unsigned nargs, const char* const* argnames,
SourceBufferHolder& srcBuf, MutableHandleFunction fun)
{
RootedObject dynamicScopeObj(cx);
Rooted<StaticScope*> staticScopeObj(cx);
if (!CreateNonSyntacticScopeChain(cx, scopeChain, &dynamicScopeObj, &staticScopeObj))
return false;
return CompileFunction(cx, options, name, nargs, argnames,
srcBuf, dynamicScopeObj, staticScopeObj, fun);
}
JS_PUBLIC_API(bool)
JS::CompileFunction(JSContext* cx, AutoObjectVector& scopeChain,
const ReadOnlyCompileOptions& options,
const char* name, unsigned nargs, const char* const* argnames,
const char16_t* chars, size_t length, MutableHandleFunction fun)
{
SourceBufferHolder srcBuf(chars, length, SourceBufferHolder::NoOwnership);
return CompileFunction(cx, scopeChain, options, name, nargs, argnames,
srcBuf, fun);
}
JS_PUBLIC_API(bool)
JS::CompileFunction(JSContext* cx, AutoObjectVector& scopeChain,
const ReadOnlyCompileOptions& options,
const char* name, unsigned nargs, const char* const* argnames,
const char* bytes, size_t length, MutableHandleFunction fun)
{
UniqueTwoByteChars chars;
if (options.utf8)
chars.reset(UTF8CharsToNewTwoByteCharsZ(cx, UTF8Chars(bytes, length), &length).get());
else
chars.reset(InflateString(cx, bytes, &length));
if (!chars)
return false;
return CompileFunction(cx, scopeChain, options, name, nargs, argnames,
chars.get(), length, fun);
}
JS_PUBLIC_API(JSString*)
JS_DecompileScript(JSContext* cx, HandleScript script, const char* name, unsigned indent)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
script->ensureNonLazyCanonicalFunction(cx);
RootedFunction fun(cx, script->functionNonDelazifying());
if (fun)
return JS_DecompileFunction(cx, fun, indent);
bool haveSource = script->scriptSource()->hasSourceData();
if (!haveSource && !JSScript::loadSource(cx, script->scriptSource(), &haveSource))
return nullptr;
return haveSource ? script->sourceData(cx) : NewStringCopyZ<CanGC>(cx, "[no source]");
}
JS_PUBLIC_API(JSString*)
JS_DecompileFunction(JSContext* cx, HandleFunction fun, unsigned indent)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, fun);
return FunctionToString(cx, fun, !(indent & JS_DONT_PRETTY_PRINT));
}
MOZ_NEVER_INLINE static bool
ExecuteScript(JSContext* cx, HandleObject scope, HandleScript script, Value* rval)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, scope, script);
MOZ_ASSERT_IF(!IsGlobalLexicalScope(scope), script->hasNonSyntacticScope());
AutoLastFrameCheck lfc(cx);
return Execute(cx, script, *scope, rval);
}
static bool
ExecuteScript(JSContext* cx, AutoObjectVector& scopeChain, HandleScript scriptArg, Value* rval)
{
RootedObject dynamicScope(cx);
Rooted<StaticScope*> staticScope(cx);
if (!CreateNonSyntacticScopeChain(cx, scopeChain, &dynamicScope, &staticScope))
return false;
RootedScript script(cx, scriptArg);
if (!script->hasNonSyntacticScope() && !IsGlobalLexicalScope(dynamicScope)) {
script = CloneGlobalScript(cx, staticScope, script);
if (!script)
return false;
js::Debugger::onNewScript(cx, script);
}
return ExecuteScript(cx, dynamicScope, script, rval);
}
MOZ_NEVER_INLINE JS_PUBLIC_API(bool)
JS_ExecuteScript(JSContext* cx, HandleScript scriptArg, MutableHandleValue rval)
{
RootedObject globalLexical(cx, &cx->global()->lexicalScope());
return ExecuteScript(cx, globalLexical, scriptArg, rval.address());
}
MOZ_NEVER_INLINE JS_PUBLIC_API(bool)
JS_ExecuteScript(JSContext* cx, HandleScript scriptArg)
{
RootedObject globalLexical(cx, &cx->global()->lexicalScope());
return ExecuteScript(cx, globalLexical, scriptArg, nullptr);
}
MOZ_NEVER_INLINE JS_PUBLIC_API(bool)
JS_ExecuteScript(JSContext* cx, AutoObjectVector& scopeChain,
HandleScript scriptArg, MutableHandleValue rval)
{
return ExecuteScript(cx, scopeChain, scriptArg, rval.address());
}
MOZ_NEVER_INLINE JS_PUBLIC_API(bool)
JS_ExecuteScript(JSContext* cx, AutoObjectVector& scopeChain, HandleScript scriptArg)
{
return ExecuteScript(cx, scopeChain, scriptArg, nullptr);
}
JS_PUBLIC_API(bool)
JS::CloneAndExecuteScript(JSContext* cx, HandleScript scriptArg)
{
CHECK_REQUEST(cx);
RootedScript script(cx, scriptArg);
Rooted<ClonedBlockObject*> globalLexical(cx, &cx->global()->lexicalScope());
if (script->compartment() != cx->compartment()) {
Rooted<StaticScope*> staticLexical(cx, &globalLexical->staticBlock());
script = CloneGlobalScript(cx, staticLexical, script);
if (!script)
return false;
js::Debugger::onNewScript(cx, script);
}
return ExecuteScript(cx, globalLexical, script, nullptr);
}
static const unsigned LARGE_SCRIPT_LENGTH = 500*1024;
static bool
Evaluate(JSContext* cx, HandleObject scope, Handle<StaticScope*> staticScope,
const ReadOnlyCompileOptions& optionsArg,
SourceBufferHolder& srcBuf, MutableHandleValue rval)
{
CompileOptions options(cx, optionsArg);
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, scope);
AutoLastFrameCheck lfc(cx);
MOZ_ASSERT_IF(!IsGlobalLexicalScope(scope), HasNonSyntacticStaticScopeChain(staticScope));
options.setIsRunOnce(true);
SourceCompressionTask sct(cx);
RootedScript script(cx, frontend::CompileScript(cx, &cx->tempLifoAlloc(),
scope, staticScope,
/* evalCaller = */ nullptr, options,
srcBuf, /* source = */ nullptr, &sct));
if (!script)
return false;
MOZ_ASSERT(script->getVersion() == options.version);
bool result = Execute(cx, script, *scope,
options.noScriptRval ? nullptr : rval.address());
if (!sct.complete())
result = false;
// After evaluation, the compiled script will not be run again.
// script->ensureRanAnalysis allocated 1 analyze::Bytecode for every opcode
// which for large scripts means significant memory. Perform a GC eagerly
// to clear out this analysis data before anything happens to inhibit the
// flushing of this memory (such as setting requestAnimationFrame).
if (script->length() > LARGE_SCRIPT_LENGTH) {
script = nullptr;
PrepareZoneForGC(cx->zone());
cx->runtime()->gc.gc(GC_NORMAL, JS::gcreason::FINISH_LARGE_EVALUATE);
}
return result;
}
static bool
Evaluate(JSContext* cx, AutoObjectVector& scopeChain, const ReadOnlyCompileOptions& optionsArg,
SourceBufferHolder& srcBuf, MutableHandleValue rval)
{
RootedObject dynamicScope(cx);
Rooted<StaticScope*> staticScope(cx);
if (!CreateNonSyntacticScopeChain(cx, scopeChain, &dynamicScope, &staticScope))
return false;
return ::Evaluate(cx, dynamicScope, staticScope, optionsArg, srcBuf, rval);
}
static bool
Evaluate(JSContext* cx, const ReadOnlyCompileOptions& optionsArg,
const char16_t* chars, size_t length, MutableHandleValue rval)
{
SourceBufferHolder srcBuf(chars, length, SourceBufferHolder::NoOwnership);
Rooted<ClonedBlockObject*> globalLexical(cx, &cx->global()->lexicalScope());
Rooted<StaticScope*> staticLexical(cx, &globalLexical->staticBlock());
return ::Evaluate(cx, globalLexical, staticLexical, optionsArg, srcBuf, rval);
}
extern JS_PUBLIC_API(bool)
JS::Evaluate(JSContext* cx, const ReadOnlyCompileOptions& options,
const char* bytes, size_t length, MutableHandleValue rval)
{
char16_t* chars;
if (options.utf8)
chars = UTF8CharsToNewTwoByteCharsZ(cx, JS::UTF8Chars(bytes, length), &length).get();
else
chars = InflateString(cx, bytes, &length);
if (!chars)
return false;
SourceBufferHolder srcBuf(chars, length, SourceBufferHolder::GiveOwnership);
Rooted<ClonedBlockObject*> globalLexical(cx, &cx->global()->lexicalScope());
Rooted<StaticScope*> staticLexical(cx, &globalLexical->staticBlock());
bool ok = ::Evaluate(cx, globalLexical, staticLexical, options, srcBuf, rval);
return ok;
}
static bool
Evaluate(JSContext* cx, const ReadOnlyCompileOptions& optionsArg,
const char* filename, MutableHandleValue rval)
{
FileContents buffer(cx);
{
AutoFile file;
if (!file.open(cx, filename) || !file.readAll(cx, buffer))
return false;
}
CompileOptions options(cx, optionsArg);
options.setFileAndLine(filename, 1);
return Evaluate(cx, options, buffer.begin(), buffer.length(), rval);
}
JS_PUBLIC_API(bool)
JS::Evaluate(JSContext* cx, const ReadOnlyCompileOptions& optionsArg,
SourceBufferHolder& srcBuf, MutableHandleValue rval)
{
Rooted<ClonedBlockObject*> globalLexical(cx, &cx->global()->lexicalScope());
Rooted<StaticScope*> staticLexical(cx, &globalLexical->staticBlock());
return ::Evaluate(cx, globalLexical, staticLexical, optionsArg, srcBuf, rval);
}
JS_PUBLIC_API(bool)
JS::Evaluate(JSContext* cx, AutoObjectVector& scopeChain, const ReadOnlyCompileOptions& optionsArg,
SourceBufferHolder& srcBuf, MutableHandleValue rval)
{
return ::Evaluate(cx, scopeChain, optionsArg, srcBuf, rval);
}
JS_PUBLIC_API(bool)
JS::Evaluate(JSContext* cx, const ReadOnlyCompileOptions& optionsArg,
const char16_t* chars, size_t length, MutableHandleValue rval)
{
return ::Evaluate(cx, optionsArg, chars, length, rval);
}
JS_PUBLIC_API(bool)
JS::Evaluate(JSContext* cx, AutoObjectVector& scopeChain, const ReadOnlyCompileOptions& optionsArg,
const char16_t* chars, size_t length, MutableHandleValue rval)
{
SourceBufferHolder srcBuf(chars, length, SourceBufferHolder::NoOwnership);
return ::Evaluate(cx, scopeChain, optionsArg, srcBuf, rval);
}
JS_PUBLIC_API(bool)
JS::Evaluate(JSContext* cx, const ReadOnlyCompileOptions& optionsArg,
const char* filename, MutableHandleValue rval)
{
return ::Evaluate(cx, optionsArg, filename, rval);
}
static JSObject*
JS_NewHelper(JSContext* cx, HandleObject ctor, const JS::HandleValueArray& inputArgs)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, ctor, inputArgs);
RootedValue ctorVal(cx, ObjectValue(*ctor));
if (!IsConstructor(ctorVal)) {
ReportValueError(cx, JSMSG_NOT_CONSTRUCTOR, JSDVG_IGNORE_STACK, ctorVal, nullptr);
return nullptr;
}
ConstructArgs args(cx);
if (!FillArgumentsFromArraylike(cx, args, inputArgs))
return nullptr;
RootedObject obj(cx);
if (!js::Construct(cx, ctorVal, args, ctorVal, &obj))
return nullptr;
return obj;
}
JS_PUBLIC_API(JSObject*)
JS_New(JSContext* cx, HandleObject ctor, const JS::HandleValueArray& inputArgs)
{
RootedObject obj(cx);
{
AutoLastFrameCheck lfc(cx);
obj = JS_NewHelper(cx, ctor, inputArgs);
}
return obj;
}
JS_PUBLIC_API(bool)
JS_CheckForInterrupt(JSContext* cx)
{
return js::CheckForInterrupt(cx);
}
JS_PUBLIC_API(JSInterruptCallback)
JS_SetInterruptCallback(JSRuntime* rt, JSInterruptCallback callback)
{
JSInterruptCallback old = rt->interruptCallback;
rt->interruptCallback = callback;
return old;
}
JS_PUBLIC_API(JSInterruptCallback)
JS_GetInterruptCallback(JSRuntime* rt)
{
return rt->interruptCallback;
}
/************************************************************************/
/*
* Promises.
*/
JS_PUBLIC_API(void)
JS::SetEnqueuePromiseJobCallback(JSRuntime* rt, JSEnqueuePromiseJobCallback callback,
void* data /* = nullptr */)
{
rt->enqueuePromiseJobCallback = callback;
rt->enqueuePromiseJobCallbackData = data;
}
JS_PUBLIC_API(JSObject*)
JS::NewPromiseObject(JSContext* cx, HandleObject executor, HandleObject proto /* = nullptr */)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
MOZ_ASSERT(IsCallable(executor));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return PromiseObject::create(cx, executor, proto);
}
JS_PUBLIC_API(bool)
JS::IsPromiseObject(JS::HandleObject obj)
{
JSObject* object = CheckedUnwrap(obj);
return object && object->is<PromiseObject>();
}
JS_PUBLIC_API(JSObject*)
JS::GetPromiseConstructor(JSContext* cx)
{
CHECK_REQUEST(cx);
Rooted<GlobalObject*> global(cx, cx->global());
return GlobalObject::getOrCreatePromiseConstructor(cx, global);
}
JS_PUBLIC_API(JSObject*)
JS::GetPromisePrototype(JSContext* cx)
{
CHECK_REQUEST(cx);
Rooted<GlobalObject*> global(cx, cx->global());
return GlobalObject::getOrCreatePromisePrototype(cx, global);
}
JS_PUBLIC_API(JS::PromiseState)
JS::GetPromiseState(JS::HandleObject obj)
{
JSObject* promise = CheckedUnwrap(obj);
return promise->as<PromiseObject>().state();
}
JS_PUBLIC_API(double)
JS::GetPromiseID(JS::HandleObject promise)
{
return promise->as<PromiseObject>().getID();
}
JS_PUBLIC_API(JS::Value)
JS::GetPromiseResult(JS::HandleObject promiseObj)
{
PromiseObject* promise = &promiseObj->as<PromiseObject>();
MOZ_ASSERT(promise->state() != JS::PromiseState::Pending);
return promise->state() == JS::PromiseState::Fulfilled ? promise->value() : promise->reason();
}
JS_PUBLIC_API(JSObject*)
JS::GetPromiseAllocationSite(JS::HandleObject promise)
{
return promise->as<PromiseObject>().allocationSite();
}
JS_PUBLIC_API(JSObject*)
JS::GetPromiseResolutionSite(JS::HandleObject promise)
{
return promise->as<PromiseObject>().resolutionSite();
}
JS_PUBLIC_API(JSObject*)
JS::CallOriginalPromiseResolve(JSContext* cx, JS::HandleValue resolutionValue)
{
InvokeArgs args(cx);
if (!args.init(1))
return nullptr;
RootedObject promiseCtor(cx, GetPromiseConstructor(cx));
if (!promiseCtor)
return nullptr;
args.setThis(ObjectValue(*promiseCtor));
args[0].set(resolutionValue);
if (!CallSelfHostedFunction(cx, "Promise_static_resolve", args))
return nullptr;
MOZ_ASSERT(args.rval().isObject());
JSObject* obj = &args.rval().toObject();
MOZ_ASSERT(obj->is<PromiseObject>());
return obj;
}
JS_PUBLIC_API(JSObject*)
JS::CallOriginalPromiseReject(JSContext* cx, JS::HandleValue rejectionValue)
{
InvokeArgs args(cx);
if (!args.init(1))
return nullptr;
RootedObject promiseCtor(cx, GetPromiseConstructor(cx));
if (!promiseCtor)
return nullptr;
args.setThis(ObjectValue(*promiseCtor));
args[0].set(rejectionValue);
if (!CallSelfHostedFunction(cx, "Promise_static_reject", args))
return nullptr;
MOZ_ASSERT(args.rval().isObject());
JSObject* obj = &args.rval().toObject();
MOZ_ASSERT(obj->is<PromiseObject>());
return obj;
}
JS_PUBLIC_API(bool)
JS::ResolvePromise(JSContext* cx, JS::HandleObject promise, JS::HandleValue resolutionValue)
{
MOZ_ASSERT(promise->is<PromiseObject>());
return promise->as<PromiseObject>().resolve(cx, resolutionValue);
}
JS_PUBLIC_API(bool)
JS::RejectPromise(JSContext* cx, JS::HandleObject promise, JS::HandleValue rejectionValue)
{
MOZ_ASSERT(promise->is<PromiseObject>());
return promise->as<PromiseObject>().reject(cx, rejectionValue);
}
JS_PUBLIC_API(JSObject*)
JS::CallOriginalPromiseThen(JSContext* cx, JS::HandleObject promise,
JS::HandleObject onResolve, JS::HandleObject onReject)
{
MOZ_ASSERT(promise->is<PromiseObject>());
MOZ_ASSERT(onResolve == nullptr || IsCallable(onResolve));
MOZ_ASSERT(onReject == nullptr || IsCallable(onReject));
InvokeArgs args(cx);
if (!args.init(2))
return nullptr;
args.setThis(ObjectValue(*promise));
args[0].setObjectOrNull(onResolve);
args[1].setObjectOrNull(onReject);
if (!CallSelfHostedFunction(cx, "Promise_then", args))
return nullptr;
MOZ_ASSERT(args.rval().isObject());
JSObject* obj = &args.rval().toObject();
MOZ_ASSERT(obj->is<PromiseObject>());
return obj;
}
JS_PUBLIC_API(bool)
JS::AddPromiseReactions(JSContext* cx, JS::HandleObject promise,
JS::HandleObject onResolve, JS::HandleObject onReject)
{
MOZ_ASSERT(promise->is<PromiseObject>());
MOZ_ASSERT(IsCallable(onResolve));
MOZ_ASSERT(IsCallable(onReject));
InvokeArgs args(cx);
if (!args.init(4))
return false;
args[0].setObject(*promise);
args[1].setNull();
args[2].setObject(*onResolve);
args[3].setObject(*onReject);
return js::CallSelfHostedFunction(cx, "EnqueuePromiseReactions", args);
}
JS_PUBLIC_API(JSObject*)
JS::GetWaitForAllPromise(JSContext* cx, const JS::AutoObjectVector& promises)
{
RootedArrayObject arr(cx, NewDenseFullyAllocatedArray(cx, promises.length()));
if (!arr)
return nullptr;
arr->ensureDenseInitializedLength(cx, 0, promises.length());
for (size_t i = 0, len = promises.length(); i < len; i++) {
#ifdef DEBUG
JSObject* obj = promises[i];
if (IsWrapper(obj))
obj = UncheckedUnwrap(obj);
MOZ_ASSERT(obj->is<PromiseObject>());
#endif
arr->setDenseElement(i, ObjectValue(*promises[i]));
}
InvokeArgs args(cx);
if (!args.init(1))
return nullptr;
args[0].setObject(*arr);
if (!js::CallSelfHostedFunction(cx, "GetWaitForAllPromise", args))
return nullptr;
MOZ_ASSERT(args.rval().isObject());
JSObject* obj = &args.rval().toObject();
MOZ_ASSERT(obj->is<PromiseObject>());
return obj;
}
JS_PUBLIC_API(void)
JS_RequestInterruptCallback(JSRuntime* rt)
{
rt->requestInterrupt(JSRuntime::RequestInterruptUrgent);
}
JS_PUBLIC_API(bool)
JS_IsRunning(JSContext* cx)
{
return cx->currentlyRunning();
}
JS_PUBLIC_API(bool)
JS_SaveFrameChain(JSContext* cx)
{
AssertHeapIsIdleOrIterating(cx);
CHECK_REQUEST(cx);
return cx->saveFrameChain();
}
JS_PUBLIC_API(void)
JS_RestoreFrameChain(JSContext* cx)
{
AssertHeapIsIdleOrIterating(cx);
CHECK_REQUEST(cx);
cx->restoreFrameChain();
}
JS::AutoSetAsyncStackForNewCalls::AutoSetAsyncStackForNewCalls(
JSContext* cx, HandleObject stack, const char* asyncCause,
JS::AutoSetAsyncStackForNewCalls::AsyncCallKind kind)
: cx(cx),
oldAsyncStack(cx, cx->runtime()->asyncStackForNewActivations),
oldAsyncCause(cx->runtime()->asyncCauseForNewActivations),
oldAsyncCallIsExplicit(cx->runtime()->asyncCallIsExplicit)
{
CHECK_REQUEST(cx);
// The option determines whether we actually use the new values at this
// point. It will not affect restoring the previous values when the object
// is destroyed, so if the option changes it won't cause consistency issues.
if (!cx->runtime()->options().asyncStack())
return;
SavedFrame* asyncStack = &stack->as<SavedFrame>();
cx->runtime()->asyncStackForNewActivations = asyncStack;
cx->runtime()->asyncCauseForNewActivations = asyncCause;
cx->runtime()->asyncCallIsExplicit = kind == AsyncCallKind::EXPLICIT;
}
JS::AutoSetAsyncStackForNewCalls::~AutoSetAsyncStackForNewCalls()
{
cx->runtime()->asyncCauseForNewActivations = oldAsyncCause;
cx->runtime()->asyncStackForNewActivations =
oldAsyncStack ? &oldAsyncStack->as<SavedFrame>() : nullptr;
cx->runtime()->asyncCallIsExplicit = oldAsyncCallIsExplicit;
}
/************************************************************************/
JS_PUBLIC_API(JSString*)
JS_NewStringCopyN(JSContext* cx, const char* s, size_t n)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!n)
return cx->names().empty;
return NewStringCopyN<CanGC>(cx, s, n);
}
JS_PUBLIC_API(JSString*)
JS_NewStringCopyZ(JSContext* cx, const char* s)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!s || !*s)
return cx->runtime()->emptyString;
return NewStringCopyZ<CanGC>(cx, s);
}
JS_PUBLIC_API(bool)
JS_StringHasBeenPinned(JSContext* cx, JSString* str)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!str->isAtom())
return false;
return AtomIsPinned(cx, &str->asAtom());
}
JS_PUBLIC_API(jsid)
INTERNED_STRING_TO_JSID(JSContext* cx, JSString* str)
{
MOZ_ASSERT(str);
MOZ_ASSERT(((size_t)str & JSID_TYPE_MASK) == 0);
MOZ_ASSERT_IF(cx, JS_StringHasBeenPinned(cx, str));
return AtomToId(&str->asAtom());
}
JS_PUBLIC_API(JSString*)
JS_AtomizeAndPinJSString(JSContext* cx, HandleString str)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSAtom* atom = AtomizeString(cx, str, PinAtom);
MOZ_ASSERT_IF(atom, JS_StringHasBeenPinned(cx, atom));
return atom;
}
JS_PUBLIC_API(JSString*)
JS_AtomizeString(JSContext* cx, const char* s)
{
return JS_AtomizeStringN(cx, s, strlen(s));
}
JS_PUBLIC_API(JSString*)
JS_AtomizeStringN(JSContext* cx, const char* s, size_t length)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return Atomize(cx, s, length, DoNotPinAtom);
}
JS_PUBLIC_API(JSString*)
JS_AtomizeAndPinString(JSContext* cx, const char* s)
{
return JS_AtomizeAndPinStringN(cx, s, strlen(s));
}
JS_PUBLIC_API(JSString*)
JS_AtomizeAndPinStringN(JSContext* cx, const char* s, size_t length)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSAtom* atom = Atomize(cx, s, length, PinAtom);
MOZ_ASSERT_IF(atom, JS_StringHasBeenPinned(cx, atom));
return atom;
}
JS_PUBLIC_API(JSString*)
JS_NewUCString(JSContext* cx, char16_t* chars, size_t length)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return NewString<CanGC>(cx, chars, length);
}
JS_PUBLIC_API(JSString*)
JS_NewUCStringCopyN(JSContext* cx, const char16_t* s, size_t n)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!n)
return cx->names().empty;
return NewStringCopyN<CanGC>(cx, s, n);
}
JS_PUBLIC_API(JSString*)
JS_NewUCStringCopyZ(JSContext* cx, const char16_t* s)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!s)
return cx->runtime()->emptyString;
return NewStringCopyZ<CanGC>(cx, s);
}
JS_PUBLIC_API(JSString*)
JS_AtomizeUCString(JSContext* cx, const char16_t* s)
{
return JS_AtomizeUCStringN(cx, s, js_strlen(s));
}
JS_PUBLIC_API(JSString*)
JS_AtomizeUCStringN(JSContext* cx, const char16_t* s, size_t length)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return AtomizeChars(cx, s, length, DoNotPinAtom);
}
JS_PUBLIC_API(JSString*)
JS_AtomizeAndPinUCStringN(JSContext* cx, const char16_t* s, size_t length)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSAtom* atom = AtomizeChars(cx, s, length, PinAtom);
MOZ_ASSERT_IF(atom, JS_StringHasBeenPinned(cx, atom));
return atom;
}
JS_PUBLIC_API(JSString*)
JS_AtomizeAndPinUCString(JSContext* cx, const char16_t* s)
{
return JS_AtomizeAndPinUCStringN(cx, s, js_strlen(s));
}
JS_PUBLIC_API(size_t)
JS_GetStringLength(JSString* str)
{
return str->length();
}
JS_PUBLIC_API(bool)
JS_StringIsFlat(JSString* str)
{
return str->isFlat();
}
JS_PUBLIC_API(bool)
JS_StringHasLatin1Chars(JSString* str)
{
return str->hasLatin1Chars();
}
JS_PUBLIC_API(const JS::Latin1Char*)
JS_GetLatin1StringCharsAndLength(JSContext* cx, const JS::AutoCheckCannotGC& nogc, JSString* str,
size_t* plength)
{
MOZ_ASSERT(plength);
AssertHeapIsIdleOrStringIsFlat(cx, str);
CHECK_REQUEST(cx);
assertSameCompartment(cx, str);
JSLinearString* linear = str->ensureLinear(cx);
if (!linear)
return nullptr;
*plength = linear->length();
return linear->latin1Chars(nogc);
}
JS_PUBLIC_API(const char16_t*)
JS_GetTwoByteStringCharsAndLength(JSContext* cx, const JS::AutoCheckCannotGC& nogc, JSString* str,
size_t* plength)
{
MOZ_ASSERT(plength);
AssertHeapIsIdleOrStringIsFlat(cx, str);
CHECK_REQUEST(cx);
assertSameCompartment(cx, str);
JSLinearString* linear = str->ensureLinear(cx);
if (!linear)
return nullptr;
*plength = linear->length();
return linear->twoByteChars(nogc);
}
JS_PUBLIC_API(const char16_t*)
JS_GetTwoByteExternalStringChars(JSString* str)
{
return str->asExternal().twoByteChars();
}
JS_PUBLIC_API(bool)
JS_GetStringCharAt(JSContext* cx, JSString* str, size_t index, char16_t* res)
{
AssertHeapIsIdleOrStringIsFlat(cx, str);
CHECK_REQUEST(cx);
assertSameCompartment(cx, str);
JSLinearString* linear = str->ensureLinear(cx);
if (!linear)
return false;
*res = linear->latin1OrTwoByteChar(index);
return true;
}
JS_PUBLIC_API(char16_t)
JS_GetFlatStringCharAt(JSFlatString* str, size_t index)
{
return str->latin1OrTwoByteChar(index);
}
JS_PUBLIC_API(bool)
JS_CopyStringChars(JSContext* cx, mozilla::Range<char16_t> dest, JSString* str)
{
AssertHeapIsIdleOrStringIsFlat(cx, str);
CHECK_REQUEST(cx);
assertSameCompartment(cx, str);
JSLinearString* linear = str->ensureLinear(cx);
if (!linear)
return false;
MOZ_ASSERT(linear->length() <= dest.length());
CopyChars(dest.start().get(), *linear);
return true;
}
JS_PUBLIC_API(const Latin1Char*)
JS_GetLatin1InternedStringChars(const JS::AutoCheckCannotGC& nogc, JSString* str)
{
MOZ_ASSERT(str->isAtom());
JSFlatString* flat = str->ensureFlat(nullptr);
if (!flat)
return nullptr;
return flat->latin1Chars(nogc);
}
JS_PUBLIC_API(const char16_t*)
JS_GetTwoByteInternedStringChars(const JS::AutoCheckCannotGC& nogc, JSString* str)
{
MOZ_ASSERT(str->isAtom());
JSFlatString* flat = str->ensureFlat(nullptr);
if (!flat)
return nullptr;
return flat->twoByteChars(nogc);
}
extern JS_PUBLIC_API(JSFlatString*)
JS_FlattenString(JSContext* cx, JSString* str)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, str);
JSFlatString* flat = str->ensureFlat(cx);
if (!flat)
return nullptr;
return flat;
}
extern JS_PUBLIC_API(const Latin1Char*)
JS_GetLatin1FlatStringChars(const JS::AutoCheckCannotGC& nogc, JSFlatString* str)
{
return str->latin1Chars(nogc);
}
extern JS_PUBLIC_API(const char16_t*)
JS_GetTwoByteFlatStringChars(const JS::AutoCheckCannotGC& nogc, JSFlatString* str)
{
return str->twoByteChars(nogc);
}
JS_PUBLIC_API(bool)
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(bool)
JS_StringEqualsAscii(JSContext* cx, JSString* str, const char* asciiBytes, bool* match)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSLinearString* linearStr = str->ensureLinear(cx);
if (!linearStr)
return false;
*match = StringEqualsAscii(linearStr, asciiBytes);
return true;
}
JS_PUBLIC_API(bool)
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(bool)
JS_FileEscapedString(FILE* fp, JSString* str, char quote)
{
JSLinearString* linearStr = str->ensureLinear(nullptr);
return linearStr && FileEscapedString(fp, linearStr, quote);
}
JS_PUBLIC_API(JSString*)
JS_NewDependentString(JSContext* cx, HandleString str, size_t start, size_t length)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return NewDependentString(cx, str, start, length);
}
JS_PUBLIC_API(JSString*)
JS_ConcatStrings(JSContext* cx, HandleString left, HandleString right)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return ConcatStrings<CanGC>(cx, left, right);
}
JS_PUBLIC_API(bool)
JS_DecodeBytes(JSContext* cx, const char* src, size_t srclen, char16_t* dst, size_t* dstlenp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!dst) {
*dstlenp = srclen;
return true;
}
size_t dstlen = *dstlenp;
if (srclen > dstlen) {
CopyAndInflateChars(dst, src, dstlen);
AutoSuppressGC suppress(cx);
JS_ReportErrorNumber(cx, GetErrorMessage, nullptr, JSMSG_BUFFER_TOO_SMALL);
return false;
}
CopyAndInflateChars(dst, src, srclen);
*dstlenp = srclen;
return true;
}
static char*
EncodeLatin1(ExclusiveContext* cx, JSString* str)
{
JSLinearString* linear = str->ensureLinear(cx);
if (!linear)
return nullptr;
JS::AutoCheckCannotGC nogc;
if (linear->hasTwoByteChars())
return JS::LossyTwoByteCharsToNewLatin1CharsZ(cx, linear->twoByteRange(nogc)).c_str();
size_t len = str->length();
Latin1Char* buf = cx->pod_malloc<Latin1Char>(len + 1);
if (!buf) {
ReportOutOfMemory(cx);
return nullptr;
}
mozilla::PodCopy(buf, linear->latin1Chars(nogc), len);
buf[len] = '\0';
return reinterpret_cast<char*>(buf);
}
JS_PUBLIC_API(char*)
JS_EncodeString(JSContext* cx, JSString* str)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return EncodeLatin1(cx, str);
}
JS_PUBLIC_API(char*)
JS_EncodeStringToUTF8(JSContext* cx, HandleString str)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return StringToNewUTF8CharsZ(cx, *str).release();
}
JS_PUBLIC_API(size_t)
JS_GetStringEncodingLength(JSContext* cx, JSString* str)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!str->ensureLinear(cx))
return size_t(-1);
return str->length();
}
JS_PUBLIC_API(size_t)
JS_EncodeStringToBuffer(JSContext* cx, JSString* str, char* buffer, size_t length)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
/*
* FIXME bug 612141 - fix DeflateStringToBuffer interface so the result
* would allow to distinguish between insufficient buffer and encoding
* error.
*/
size_t writtenLength = length;
JSLinearString* linear = str->ensureLinear(cx);
if (!linear)
return size_t(-1);
bool res;
if (linear->hasLatin1Chars()) {
JS::AutoCheckCannotGC nogc;
res = DeflateStringToBuffer(nullptr, linear->latin1Chars(nogc), linear->length(), buffer,
&writtenLength);
} else {
JS::AutoCheckCannotGC nogc;
res = DeflateStringToBuffer(nullptr, linear->twoByteChars(nogc), linear->length(), buffer,
&writtenLength);
}
if (res) {
MOZ_ASSERT(writtenLength <= length);
return writtenLength;
}
MOZ_ASSERT(writtenLength <= length);
size_t necessaryLength = str->length();
if (necessaryLength == size_t(-1))
return size_t(-1);
MOZ_ASSERT(writtenLength == length); // C strings are NOT encoded.
return necessaryLength;
}
JS_PUBLIC_API(JS::Symbol*)
JS::NewSymbol(JSContext* cx, HandleString description)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (description)
assertSameCompartment(cx, description);
return Symbol::new_(cx, SymbolCode::UniqueSymbol, description);
}
JS_PUBLIC_API(JS::Symbol*)
JS::GetSymbolFor(JSContext* cx, HandleString key)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, key);
return Symbol::for_(cx, key);
}
JS_PUBLIC_API(JSString*)
JS::GetSymbolDescription(HandleSymbol symbol)
{
return symbol->description();
}
JS_PUBLIC_API(JS::SymbolCode)
JS::GetSymbolCode(Handle<Symbol*> symbol)
{
return symbol->code();
}
JS_PUBLIC_API(JS::Symbol*)
JS::GetWellKnownSymbol(JSContext* cx, JS::SymbolCode which)
{
return cx->wellKnownSymbols().get(uint32_t(which));
}
#ifdef DEBUG
static bool
PropertySpecNameIsDigits(const char* s) {
if (JS::PropertySpecNameIsSymbol(s))
return false;
if (!*s)
return false;
for (; *s; s++) {
if (*s < '0' || *s > '9')
return false;
}
return true;
}
#endif // DEBUG
JS_PUBLIC_API(bool)
JS::PropertySpecNameEqualsId(const char* name, HandleId id)
{
if (JS::PropertySpecNameIsSymbol(name)) {
if (!JSID_IS_SYMBOL(id))
return false;
Symbol* sym = JSID_TO_SYMBOL(id);
return sym->isWellKnownSymbol() && sym->code() == PropertySpecNameToSymbolCode(name);
}
MOZ_ASSERT(!PropertySpecNameIsDigits(name));
return JSID_IS_ATOM(id) && JS_FlatStringEqualsAscii(JSID_TO_ATOM(id), name);
}
JS_PUBLIC_API(bool)
JS_Stringify(JSContext* cx, MutableHandleValue vp, HandleObject replacer,
HandleValue space, JSONWriteCallback callback, void* data)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, replacer, space);
StringBuffer sb(cx);
if (!sb.ensureTwoByteChars())
return false;
if (!Stringify(cx, vp, replacer, space, sb, StringifyBehavior::Normal))
return false;
if (sb.empty() && !sb.append(cx->names().null))
return false;
return callback(sb.rawTwoByteBegin(), sb.length(), data);
}
JS_PUBLIC_API(bool)
JS::ToJSONMaybeSafely(JSContext* cx, JS::HandleObject input,
JSONWriteCallback callback, void* data)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, input);
StringBuffer sb(cx);
if (!sb.ensureTwoByteChars())
return false;
RootedValue inputValue(cx, ObjectValue(*input));
if (!Stringify(cx, &inputValue, nullptr, NullHandleValue, sb,
StringifyBehavior::RestrictedSafe))
return false;
if (sb.empty() && !sb.append(cx->names().null))
return false;
return callback(sb.rawTwoByteBegin(), sb.length(), data);
}
JS_PUBLIC_API(bool)
JS_ParseJSON(JSContext* cx, const char16_t* chars, uint32_t len, MutableHandleValue vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return ParseJSONWithReviver(cx, mozilla::Range<const char16_t>(chars, len), NullHandleValue, vp);
}
JS_PUBLIC_API(bool)
JS_ParseJSON(JSContext* cx, HandleString str, MutableHandleValue vp)
{
return JS_ParseJSONWithReviver(cx, str, NullHandleValue, vp);
}
JS_PUBLIC_API(bool)
JS_ParseJSONWithReviver(JSContext* cx, const char16_t* chars, uint32_t len, HandleValue reviver, MutableHandleValue vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return ParseJSONWithReviver(cx, mozilla::Range<const char16_t>(chars, len), reviver, vp);
}
JS_PUBLIC_API(bool)
JS_ParseJSONWithReviver(JSContext* cx, HandleString str, HandleValue reviver, MutableHandleValue vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, str);
AutoStableStringChars stableChars(cx);
if (!stableChars.init(cx, str))
return false;
return stableChars.isLatin1()
? ParseJSONWithReviver(cx, stableChars.latin1Range(), reviver, vp)
: ParseJSONWithReviver(cx, stableChars.twoByteRange(), reviver, vp);
}
/************************************************************************/
JS_PUBLIC_API(void)
JS_ReportError(JSContext* cx, const char* format, ...)
{
va_list ap;
AssertHeapIsIdle(cx);
va_start(ap, format);
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);
ReportErrorNumberVA(cx, JSREPORT_ERROR, errorCallback, userRef,
errorNumber, ArgumentsAreASCII, ap);
}
JS_PUBLIC_API(void)
JS_ReportErrorNumberUC(JSContext* cx, JSErrorCallback errorCallback,
void* userRef, const unsigned errorNumber, ...)
{
va_list ap;
AssertHeapIsIdle(cx);
va_start(ap, errorNumber);
ReportErrorNumberVA(cx, JSREPORT_ERROR, errorCallback, userRef,
errorNumber, ArgumentsAreUnicode, ap);
va_end(ap);
}
JS_PUBLIC_API(void)
JS_ReportErrorNumberUCArray(JSContext* cx, JSErrorCallback errorCallback,
void* userRef, const unsigned errorNumber,
const char16_t** args)
{
AssertHeapIsIdle(cx);
ReportErrorNumberUCArray(cx, JSREPORT_ERROR, errorCallback, userRef,
errorNumber, args);
}
JS_PUBLIC_API(bool)
JS_ReportWarning(JSContext* cx, const char* format, ...)
{
va_list ap;
bool ok;
AssertHeapIsIdle(cx);
va_start(ap, format);
ok = ReportErrorVA(cx, JSREPORT_WARNING, format, ap);
va_end(ap);
return ok;
}
JS_PUBLIC_API(bool)
JS_ReportErrorFlagsAndNumber(JSContext* cx, unsigned flags,
JSErrorCallback errorCallback, void* userRef,
const unsigned errorNumber, ...)
{
va_list ap;
bool ok;
AssertHeapIsIdle(cx);
va_start(ap, errorNumber);
ok = ReportErrorNumberVA(cx, flags, errorCallback, userRef,
errorNumber, ArgumentsAreASCII, ap);
va_end(ap);
return ok;
}
JS_PUBLIC_API(bool)
JS_ReportErrorFlagsAndNumberUC(JSContext* cx, unsigned flags,
JSErrorCallback errorCallback, void* userRef,
const unsigned errorNumber, ...)
{
va_list ap;
bool ok;
AssertHeapIsIdle(cx);
va_start(ap, errorNumber);
ok = ReportErrorNumberVA(cx, flags, errorCallback, userRef,
errorNumber, ArgumentsAreUnicode, ap);
va_end(ap);
return ok;
}
JS_PUBLIC_API(void)
JS_ReportOutOfMemory(JSContext* cx)
{
ReportOutOfMemory(cx);
}
JS_PUBLIC_API(void)
JS_ReportAllocationOverflow(JSContext* cx)
{
ReportAllocationOverflow(cx);
}
JS_PUBLIC_API(JSErrorReporter)
JS_GetErrorReporter(JSRuntime* rt)
{
return rt->errorReporter;
}
JS_PUBLIC_API(JSErrorReporter)
JS_SetErrorReporter(JSRuntime* rt, JSErrorReporter er)
{
JSErrorReporter older;
older = rt->errorReporter;
rt->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 NewDateObject(cx, year, mon, mday, hour, min, sec);
}
JS_PUBLIC_API(JSObject*)
JS::NewDateObject(JSContext* cx, JS::ClippedTime time)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return NewDateObjectMsec(cx, time);
}
JS_PUBLIC_API(bool)
JS_ObjectIsDate(JSContext* cx, HandleObject obj, bool* isDate)
{
assertSameCompartment(cx, obj);
ESClassValue cls;
if (!GetBuiltinClass(cx, obj, &cls))
return false;
*isDate = cls == ESClass_Date;
return true;
}
/************************************************************************/
/*
* Regular Expressions.
*/
JS_PUBLIC_API(JSObject*)
JS_NewRegExpObject(JSContext* cx, const char* bytes, size_t length, unsigned flags)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
ScopedJSFreePtr<char16_t> chars(InflateString(cx, bytes, &length));
if (!chars)
return nullptr;
RegExpObject* reobj = RegExpObject::create(cx, chars, length,
RegExpFlag(flags), nullptr, cx->tempLifoAlloc());
return reobj;
}
JS_PUBLIC_API(JSObject*)
JS_NewUCRegExpObject(JSContext* cx, const char16_t* chars, size_t length, unsigned flags)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return RegExpObject::create(cx, chars, length,
RegExpFlag(flags), nullptr, cx->tempLifoAlloc());
}
JS_PUBLIC_API(bool)
JS_SetRegExpInput(JSContext* cx, HandleObject obj, HandleString input)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, input);
RegExpStatics* res = obj->as<GlobalObject>().getRegExpStatics(cx);
if (!res)
return false;
res->reset(cx, input);
return true;
}
JS_PUBLIC_API(bool)
JS_ClearRegExpStatics(JSContext* cx, HandleObject obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
MOZ_ASSERT(obj);
RegExpStatics* res = obj->as<GlobalObject>().getRegExpStatics(cx);
if (!res)
return false;
res->clear();
return true;
}
JS_PUBLIC_API(bool)
JS_ExecuteRegExp(JSContext* cx, HandleObject obj, HandleObject reobj, char16_t* chars,
size_t length, size_t* indexp, bool test, MutableHandleValue rval)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RegExpStatics* res = obj->as<GlobalObject>().getRegExpStatics(cx);
if (!res)
return false;
RootedLinearString input(cx, NewStringCopyN<CanGC>(cx, chars, length));
if (!input)
return false;
return ExecuteRegExpLegacy(cx, res, reobj->as<RegExpObject>(), input, indexp, test, rval);
}
JS_PUBLIC_API(bool)
JS_ExecuteRegExpNoStatics(JSContext* cx, HandleObject obj, char16_t* chars, size_t length,
size_t* indexp, bool test, MutableHandleValue rval)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedLinearString input(cx, NewStringCopyN<CanGC>(cx, chars, length));
if (!input)
return false;
return ExecuteRegExpLegacy(cx, nullptr, obj->as<RegExpObject>(), input, indexp, test,
rval);
}
JS_PUBLIC_API(bool)
JS_ObjectIsRegExp(JSContext* cx, HandleObject obj, bool* isRegExp)
{
assertSameCompartment(cx, obj);
ESClassValue cls;
if (!GetBuiltinClass(cx, obj, &cls))
return false;
*isRegExp = cls == ESClass_RegExp;
return true;
}
JS_PUBLIC_API(unsigned)
JS_GetRegExpFlags(JSContext* cx, HandleObject obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RegExpGuard shared(cx);
if (!RegExpToShared(cx, obj, &shared))
return false;
return shared.re()->getFlags();
}
JS_PUBLIC_API(JSString*)
JS_GetRegExpSource(JSContext* cx, HandleObject obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RegExpGuard shared(cx);
if (!RegExpToShared(cx, obj, &shared))
return nullptr;
return shared.re()->getSource();
}
/************************************************************************/
JS_PUBLIC_API(bool)
JS_SetDefaultLocale(JSRuntime* rt, const char* locale)
{
AssertHeapIsIdle(rt);
return rt->setDefaultLocale(locale);
}
JS_PUBLIC_API(void)
JS_ResetDefaultLocale(JSRuntime* rt)
{
AssertHeapIsIdle(rt);
rt->resetDefaultLocale();
}
JS_PUBLIC_API(void)
JS_SetLocaleCallbacks(JSRuntime* rt, const JSLocaleCallbacks* callbacks)
{
AssertHeapIsIdle(rt);
rt->localeCallbacks = callbacks;
}
JS_PUBLIC_API(const JSLocaleCallbacks*)
JS_GetLocaleCallbacks(JSRuntime* rt)
{
/* This function can be called by a finalizer. */
return rt->localeCallbacks;
}
/************************************************************************/
JS_PUBLIC_API(bool)
JS_IsExceptionPending(JSContext* cx)
{
/* This function can be called by a finalizer. */
return (bool) cx->isExceptionPending();
}
JS_PUBLIC_API(bool)
JS_GetPendingException(JSContext* cx, MutableHandleValue vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!cx->isExceptionPending())
return false;
return cx->getPendingException(vp);
}
JS_PUBLIC_API(void)
JS_SetPendingException(JSContext* cx, HandleValue value)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
cx->setPendingException(value);
}
JS_PUBLIC_API(void)
JS_ClearPendingException(JSContext* cx)
{
AssertHeapIsIdle(cx);
cx->clearPendingException();
}
JS_PUBLIC_API(bool)
JS_ReportPendingException(JSContext* cx)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
// This can only fail due to oom.
bool ok = ReportUncaughtException(cx);
MOZ_ASSERT(!cx->isExceptionPending());
return ok;
}
JS::AutoSaveExceptionState::AutoSaveExceptionState(JSContext* cx)
: context(cx),
wasPropagatingForcedReturn(cx->propagatingForcedReturn_),
wasOverRecursed(cx->overRecursed_),
wasThrowing(cx->throwing),
exceptionValue(cx)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (wasPropagatingForcedReturn)
cx->clearPropagatingForcedReturn();
if (wasOverRecursed)
cx->overRecursed_ = false;
if (wasThrowing) {
exceptionValue = cx->unwrappedException_;
cx->clearPendingException();
}
}
void
JS::AutoSaveExceptionState::restore()
{
context->propagatingForcedReturn_ = wasPropagatingForcedReturn;
context->overRecursed_ = wasOverRecursed;
context->throwing = wasThrowing;
context->unwrappedException_ = exceptionValue;
drop();
}
JS::AutoSaveExceptionState::~AutoSaveExceptionState()
{
if (!context->isExceptionPending()) {
if (wasPropagatingForcedReturn)
context->setPropagatingForcedReturn();
if (wasThrowing) {
context->overRecursed_ = wasOverRecursed;
context->throwing = true;
context->unwrappedException_ = exceptionValue;
}
}
}
struct JSExceptionState {
explicit JSExceptionState(JSContext* cx) : exception(cx) {}
bool throwing;
PersistentRootedValue exception;
};
JS_PUBLIC_API(JSExceptionState*)
JS_SaveExceptionState(JSContext* cx)
{
JSExceptionState* state;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
state = cx->new_<JSExceptionState>(cx);
if (state)
state->throwing = JS_GetPendingException(cx, &state->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);
js_delete(state);
}
JS_PUBLIC_API(JSErrorReport*)
JS_ErrorFromException(JSContext* cx, HandleObject obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
return ErrorFromException(cx, obj);
}
void
JSErrorReport::initLinebuf(const char16_t* linebuf, size_t linebufLength, size_t tokenOffset)
{
MOZ_ASSERT(linebuf);
MOZ_ASSERT(tokenOffset <= linebufLength);
MOZ_ASSERT(linebuf[linebufLength] == '\0');
linebuf_ = linebuf;
linebufLength_ = linebufLength;
tokenOffset_ = tokenOffset;
}
JS_PUBLIC_API(bool)
JS_ThrowStopIteration(JSContext* cx)
{
AssertHeapIsIdle(cx);
return ThrowStopIteration(cx);
}
JS_PUBLIC_API(bool)
JS_IsStopIteration(Value v)
{
return v.isObject() && v.toObject().is<StopIterationObject>();
}
JS_PUBLIC_API(intptr_t)
JS_GetCurrentThread()
{
return reinterpret_cast<intptr_t>(PR_GetCurrentThread());
}
extern MOZ_NEVER_INLINE JS_PUBLIC_API(void)
JS_AbortIfWrongThread(JSRuntime* rt)
{
if (!CurrentThreadCanAccessRuntime(rt))
MOZ_CRASH();
if (!js::TlsPerThreadData.get()->associatedWith(rt))
MOZ_CRASH();
}
#ifdef JS_GC_ZEAL
JS_PUBLIC_API(void)
JS_GetGCZealBits(JSContext* cx, uint32_t* zealBits, uint32_t* frequency, uint32_t* nextScheduled)
{
cx->runtime()->gc.getZealBits(zealBits, frequency, nextScheduled);
}
JS_PUBLIC_API(void)
JS_SetGCZeal(JSContext* cx, uint8_t zeal, uint32_t frequency)
{
cx->runtime()->gc.setZeal(zeal, frequency);
}
JS_PUBLIC_API(void)
JS_ScheduleGC(JSContext* cx, uint32_t count)
{
cx->runtime()->gc.setNextScheduled(count);
}
#endif
JS_PUBLIC_API(void)
JS_SetParallelParsingEnabled(JSRuntime* rt, bool enabled)
{
rt->setParallelParsingEnabled(enabled);
}
JS_PUBLIC_API(void)
JS_SetOffthreadIonCompilationEnabled(JSRuntime* rt, bool enabled)
{
rt->setOffthreadIonCompilationEnabled(enabled);
}
JS_PUBLIC_API(void)
JS_SetGlobalJitCompilerOption(JSRuntime* rt, JSJitCompilerOption opt, uint32_t value)
{
switch (opt) {
case JSJITCOMPILER_BASELINE_WARMUP_TRIGGER:
if (value == uint32_t(-1)) {
jit::DefaultJitOptions defaultValues;
value = defaultValues.baselineWarmUpThreshold;
}
jit::JitOptions.baselineWarmUpThreshold = value;
break;
case JSJITCOMPILER_ION_WARMUP_TRIGGER:
if (value == uint32_t(-1)) {
jit::JitOptions.resetCompilerWarmUpThreshold();
break;
}
jit::JitOptions.setCompilerWarmUpThreshold(value);
if (value == 0)
jit::JitOptions.setEagerCompilation();
break;
case JSJITCOMPILER_ION_GVN_ENABLE:
if (value == 0) {
jit::JitOptions.enableGvn(false);
JitSpew(js::jit::JitSpew_IonScripts, "Disable ion's GVN");
} else {
jit::JitOptions.enableGvn(true);
JitSpew(js::jit::JitSpew_IonScripts, "Enable ion's GVN");
}
break;
case JSJITCOMPILER_ION_FORCE_IC:
if (value == 0) {
jit::JitOptions.forceInlineCaches = false;
JitSpew(js::jit::JitSpew_IonScripts, "IonBuilder: Enable non-IC optimizations.");
} else {
jit::JitOptions.forceInlineCaches = true;
JitSpew(js::jit::JitSpew_IonScripts, "IonBuilder: Disable non-IC optimizations.");
}
break;
case JSJITCOMPILER_ION_ENABLE:
if (value == 1) {
JS::RuntimeOptionsRef(rt).setIon(true);
JitSpew(js::jit::JitSpew_IonScripts, "Enable ion");
} else if (value == 0) {
JS::RuntimeOptionsRef(rt).setIon(false);
JitSpew(js::jit::JitSpew_IonScripts, "Disable ion");
}
break;
case JSJITCOMPILER_BASELINE_ENABLE:
if (value == 1) {
JS::RuntimeOptionsRef(rt).setBaseline(true);
ReleaseAllJITCode(rt->defaultFreeOp());
JitSpew(js::jit::JitSpew_BaselineScripts, "Enable baseline");
} else if (value == 0) {
JS::RuntimeOptionsRef(rt).setBaseline(false);
ReleaseAllJITCode(rt->defaultFreeOp());
JitSpew(js::jit::JitSpew_BaselineScripts, "Disable baseline");
}
break;
case JSJITCOMPILER_OFFTHREAD_COMPILATION_ENABLE:
if (value == 1) {
rt->setOffthreadIonCompilationEnabled(true);
JitSpew(js::jit::JitSpew_IonScripts, "Enable offthread compilation");
} else if (value == 0) {
rt->setOffthreadIonCompilationEnabled(false);
JitSpew(js::jit::JitSpew_IonScripts, "Disable offthread compilation");
}
break;
case JSJITCOMPILER_SIGNALS_ENABLE:
if (value == 1) {
rt->setCanUseSignalHandlers(true);
JitSpew(js::jit::JitSpew_IonScripts, "Enable signals");
} else if (value == 0) {
rt->setCanUseSignalHandlers(false);
JitSpew(js::jit::JitSpew_IonScripts, "Disable signals");
}
break;
case JSJITCOMPILER_JUMP_THRESHOLD:
if (value == uint32_t(-1)) {
jit::DefaultJitOptions defaultValues;
value = defaultValues.jumpThreshold;
}
jit::JitOptions.jumpThreshold = value;
break;
default:
break;
}
}
JS_PUBLIC_API(int)
JS_GetGlobalJitCompilerOption(JSRuntime* rt, JSJitCompilerOption opt)
{
#ifndef JS_CODEGEN_NONE
switch (opt) {
case JSJITCOMPILER_BASELINE_WARMUP_TRIGGER:
return jit::JitOptions.baselineWarmUpThreshold;
case JSJITCOMPILER_ION_WARMUP_TRIGGER:
return jit::JitOptions.forcedDefaultIonWarmUpThreshold.isSome()
? jit::JitOptions.forcedDefaultIonWarmUpThreshold.ref()
: jit::OptimizationInfo::CompilerWarmupThreshold;
case JSJITCOMPILER_ION_FORCE_IC:
return jit::JitOptions.forceInlineCaches;
case JSJITCOMPILER_ION_ENABLE:
return JS::RuntimeOptionsRef(rt).ion();
case JSJITCOMPILER_BASELINE_ENABLE:
return JS::RuntimeOptionsRef(rt).baseline();
case JSJITCOMPILER_OFFTHREAD_COMPILATION_ENABLE:
return rt->canUseOffthreadIonCompilation();
case JSJITCOMPILER_SIGNALS_ENABLE:
return rt->canUseSignalHandlers();
default:
break;
}
#endif
return 0;
}
/************************************************************************/
#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(bool)
JS_IndexToId(JSContext* cx, uint32_t index, MutableHandleId id)
{
return IndexToId(cx, index, id);
}
JS_PUBLIC_API(bool)
JS_CharsToId(JSContext* cx, JS::TwoByteChars chars, MutableHandleId idp)
{
RootedAtom atom(cx, AtomizeChars(cx, chars.start().get(), chars.length()));
if (!atom)
return false;
#ifdef DEBUG
uint32_t dummy;
MOZ_ASSERT(!atom->isIndex(&dummy), "API misuse: |chars| must not encode an index");
#endif
idp.set(AtomToId(atom));
return true;
}
JS_PUBLIC_API(bool)
JS_IsIdentifier(JSContext* cx, HandleString str, bool* isIdentifier)
{
assertSameCompartment(cx, str);
JSLinearString* linearStr = str->ensureLinear(cx);
if (!linearStr)
return false;
*isIdentifier = js::frontend::IsIdentifier(linearStr);
return true;
}
JS_PUBLIC_API(bool)
JS_IsIdentifier(const char16_t* chars, size_t length)
{
return js::frontend::IsIdentifier(chars, length);
}
namespace JS {
void AutoFilename::reset()
{
if (ss_) {
ss_->decref();
ss_ = nullptr;
}
if (filename_.is<const char*>())
filename_.as<const char*>() = nullptr;
else
filename_.as<UniqueChars>().reset();
}
void AutoFilename::setScriptSource(js::ScriptSource* p)
{
MOZ_ASSERT(!ss_);
MOZ_ASSERT(!get());
ss_ = p;
if (p) {
p->incref();
setUnowned(p->filename());
}
}
void AutoFilename::setUnowned(const char* filename)
{
MOZ_ASSERT(!get());
filename_.as<const char*>() = filename;
}
void AutoFilename::setOwned(UniqueChars&& filename)
{
MOZ_ASSERT(!get());
filename_ = AsVariant(Move(filename));
}
const char* AutoFilename::get() const
{
if (filename_.is<const char*>())
return filename_.as<const char*>();
return filename_.as<UniqueChars>().get();
}
JS_PUBLIC_API(bool)
DescribeScriptedCaller(JSContext* cx, AutoFilename* filename, unsigned* lineno,
unsigned* column)
{
if (filename)
filename->reset();
if (lineno)
*lineno = 0;
if (column)
*column = 0;
NonBuiltinFrameIter i(cx);
if (i.done())
return false;
// If the caller is hidden, the embedding wants us to return false here so
// that it can check its own stack (see HideScriptedCaller).
if (i.activation()->scriptedCallerIsHidden())
return false;
if (filename) {
if (i.isWasm()) {
// For Wasm, copy out the filename, there is no script source.
UniqueChars copy = DuplicateString(i.filename());
if (!copy)
filename->setUnowned("out of memory");
else
filename->setOwned(Move(copy));
} else {
// All other frames have a script source to read the filename from.
filename->setScriptSource(i.scriptSource());
}
}
if (lineno)
*lineno = i.computeLine(column);
else if (column)
i.computeLine(column);
return true;
}
JS_PUBLIC_API(JSObject*)
GetScriptedCallerGlobal(JSContext* cx)
{
NonBuiltinFrameIter i(cx);
if (i.done())
return nullptr;
// If the caller is hidden, the embedding wants us to return null here so
// that it can check its own stack (see HideScriptedCaller).
if (i.activation()->scriptedCallerIsHidden())
return nullptr;
GlobalObject* global = i.activation()->compartment()->maybeGlobal();
// Noone should be running code in the atoms compartment or running code in
// a compartment without any live objects, so there should definitely be a
// live global.
MOZ_ASSERT(global);
return global;
}
JS_PUBLIC_API(void)
HideScriptedCaller(JSContext* cx)
{
MOZ_ASSERT(cx);
// If there's no accessible activation on the stack, we'll return null from
// DescribeScriptedCaller anyway, so there's no need to annotate anything.
Activation* act = cx->runtime()->activation();
if (!act)
return;
act->hideScriptedCaller();
}
JS_PUBLIC_API(void)
UnhideScriptedCaller(JSContext* cx)
{
Activation* act = cx->runtime()->activation();
if (!act)
return;
act->unhideScriptedCaller();
}
} /* namespace JS */
static PRStatus
CallOnce(void* func)
{
JSInitCallback init = JS_DATA_TO_FUNC_PTR(JSInitCallback, func);
return init() ? PR_SUCCESS : PR_FAILURE;
}
JS_PUBLIC_API(bool)
JS_CallOnce(JSCallOnceType* once, JSInitCallback func)
{
return PR_CallOnceWithArg(once, CallOnce, JS_FUNC_TO_DATA_PTR(void*, func)) == PR_SUCCESS;
}
AutoGCRooter::AutoGCRooter(JSContext* cx, ptrdiff_t tag)
: down(ContextFriendFields::get(cx)->roots.autoGCRooters_),
tag_(tag),
stackTop(&ContextFriendFields::get(cx)->roots.autoGCRooters_)
{
MOZ_ASSERT(this != *stackTop);
*stackTop = this;
}
AutoGCRooter::AutoGCRooter(ContextFriendFields* cx, ptrdiff_t tag)
: down(cx->roots.autoGCRooters_),
tag_(tag),
stackTop(&cx->roots.autoGCRooters_)
{
MOZ_ASSERT(this != *stackTop);
*stackTop = this;
}
#ifdef JS_DEBUG
JS_PUBLIC_API(void)
JS::detail::AssertArgumentsAreSane(JSContext* cx, HandleValue value)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
}
#endif /* JS_DEBUG */
JS_PUBLIC_API(void*)
JS_EncodeScript(JSContext* cx, HandleScript scriptArg, uint32_t* lengthp)
{
XDREncoder encoder(cx);
RootedScript script(cx, scriptArg);
if (!encoder.codeScript(&script))
return nullptr;
return encoder.forgetData(lengthp);
}
JS_PUBLIC_API(void*)
JS_EncodeInterpretedFunction(JSContext* cx, HandleObject funobjArg, uint32_t* lengthp)
{
XDREncoder encoder(cx);
RootedFunction funobj(cx, &funobjArg->as<JSFunction>());
if (!encoder.codeFunction(&funobj))
return nullptr;
return encoder.forgetData(lengthp);
}
JS_PUBLIC_API(JSScript*)
JS_DecodeScript(JSContext* cx, const void* data, uint32_t length)
{
XDRDecoder decoder(cx, data, length);
RootedScript script(cx);
if (!decoder.codeScript(&script))
return nullptr;
return script;
}
JS_PUBLIC_API(JSObject*)
JS_DecodeInterpretedFunction(JSContext* cx, const void* data, uint32_t length)
{
XDRDecoder decoder(cx, data, length);
RootedFunction funobj(cx);
if (!decoder.codeFunction(&funobj))
return nullptr;
return funobj;
}
JS_PUBLIC_API(void)
JS::SetBuildIdOp(JSRuntime* rt, JS::BuildIdOp buildIdOp)
{
rt->buildIdOp = buildIdOp;
}
JS_PUBLIC_API(void)
JS::SetAsmJSCacheOps(JSRuntime* rt, const JS::AsmJSCacheOps* ops)
{
rt->asmJSCacheOps = *ops;
}
char*
JSAutoByteString::encodeLatin1(ExclusiveContext* cx, JSString* str)
{
mBytes = EncodeLatin1(cx, str);
return mBytes;
}
JS_PUBLIC_API(void)
JS::SetLargeAllocationFailureCallback(JSRuntime* rt, JS::LargeAllocationFailureCallback lafc,
void* data)
{
rt->largeAllocationFailureCallback = lafc;
rt->largeAllocationFailureCallbackData = data;
}
JS_PUBLIC_API(void)
JS::SetOutOfMemoryCallback(JSRuntime* rt, OutOfMemoryCallback cb, void* data)
{
rt->oomCallback = cb;
rt->oomCallbackData = data;
}
JS_PUBLIC_API(bool)
JS::CaptureCurrentStack(JSContext* cx, JS::MutableHandleObject stackp, unsigned maxFrameCount)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
MOZ_RELEASE_ASSERT(cx->compartment());
JSCompartment* compartment = cx->compartment();
Rooted<SavedFrame*> frame(cx);
if (!compartment->savedStacks().saveCurrentStack(cx, &frame, maxFrameCount))
return false;
stackp.set(frame.get());
return true;
}
JS_PUBLIC_API(bool)
JS::CopyAsyncStack(JSContext* cx, JS::HandleObject asyncStack,
JS::HandleString asyncCause, JS::MutableHandleObject stackp,
unsigned maxFrameCount)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
MOZ_RELEASE_ASSERT(cx->compartment());
js::AssertObjectIsSavedFrameOrWrapper(cx, asyncStack);
JSCompartment* compartment = cx->compartment();
Rooted<SavedFrame*> frame(cx);
if (!compartment->savedStacks().copyAsyncStack(cx, asyncStack, asyncCause,
&frame, maxFrameCount))
return false;
stackp.set(frame.get());
return true;
}
JS_PUBLIC_API(Zone*)
JS::GetObjectZone(JSObject* obj)
{
return obj->zone();
}
