https://github.com/mozilla/gecko-dev
Tip revision: c858d12560c302dd7f678e6bed3a6c1e66d45113 authored by ffxbld on 04 August 2015, 02:20:59 UTC
Added FIREFOX_38_2_0esr_RELEASE FIREFOX_38_2_0esr_BUILD1 tag(s) for changeset eff70db14dbe. DONTBUILD CLOSED TREE a=release
Added FIREFOX_38_2_0esr_RELEASE FIREFOX_38_2_0esr_BUILD1 tag(s) for changeset eff70db14dbe. DONTBUILD CLOSED TREE a=release
Tip revision: c858d12
jsfriendapi.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/. */
#include "jsfriendapi.h"
#include "mozilla/PodOperations.h"
#include <stdint.h>
#include "jscntxt.h"
#include "jscompartment.h"
#include "jsgc.h"
#include "jsobj.h"
#include "jsprf.h"
#include "jswatchpoint.h"
#include "jsweakmap.h"
#include "jswrapper.h"
#include "prmjtime.h"
#include "builtin/TestingFunctions.h"
#include "js/Proxy.h"
#include "proxy/DeadObjectProxy.h"
#include "vm/ArgumentsObject.h"
#include "vm/WrapperObject.h"
#include "jsobjinlines.h"
#include "jsscriptinlines.h"
#include "vm/NativeObject-inl.h"
#include "vm/ScopeObject-inl.h"
using namespace js;
using mozilla::Move;
using mozilla::PodArrayZero;
using mozilla::UniquePtr;
// Required by PerThreadDataFriendFields::getMainThread()
JS_STATIC_ASSERT(offsetof(JSRuntime, mainThread) ==
PerThreadDataFriendFields::RuntimeMainThreadOffset);
PerThreadDataFriendFields::PerThreadDataFriendFields()
{
PodArrayZero(nativeStackLimit);
#if JS_STACK_GROWTH_DIRECTION > 0
for (int i=0; i<StackKindCount; i++)
nativeStackLimit[i] = UINTPTR_MAX;
#endif
PodArrayZero(thingGCRooters);
}
JS_FRIEND_API(void)
js::SetSourceHook(JSRuntime* rt, UniquePtr<SourceHook> hook)
{
rt->sourceHook = Move(hook);
}
JS_FRIEND_API(UniquePtr<SourceHook>)
js::ForgetSourceHook(JSRuntime* rt)
{
return Move(rt->sourceHook);
}
JS_FRIEND_API(void)
JS_SetGrayGCRootsTracer(JSRuntime* rt, JSTraceDataOp traceOp, void* data)
{
rt->gc.setGrayRootsTracer(traceOp, data);
}
JS_FRIEND_API(JSString*)
JS_GetAnonymousString(JSRuntime* rt)
{
MOZ_ASSERT(rt->hasContexts());
return rt->commonNames->anonymous;
}
JS_FRIEND_API(JSObject*)
JS_FindCompilationScope(JSContext* cx, HandleObject objArg)
{
RootedObject obj(cx, objArg);
/*
* We unwrap wrappers here. This is a little weird, but it's what's being
* asked of us.
*/
if (obj->is<WrapperObject>())
obj = UncheckedUnwrap(obj);
/*
* Innerize the target_obj so that we compile in the correct (inner)
* scope.
*/
return GetInnerObject(obj);
}
JS_FRIEND_API(JSFunction*)
JS_GetObjectFunction(JSObject* obj)
{
if (obj->is<JSFunction>())
return &obj->as<JSFunction>();
return nullptr;
}
JS_FRIEND_API(bool)
JS_SplicePrototype(JSContext* cx, HandleObject obj, HandleObject proto)
{
/*
* Change the prototype of an object which hasn't been used anywhere
* and does not share its type with another object. Unlike JS_SetPrototype,
* does not nuke type information for the object.
*/
CHECK_REQUEST(cx);
if (!obj->isSingleton()) {
/*
* We can see non-singleton objects when trying to splice prototypes
* due to mutable __proto__ (ugh).
*/
return JS_SetPrototype(cx, obj, proto);
}
Rooted<TaggedProto> tagged(cx, TaggedProto(proto));
return obj->splicePrototype(cx, obj->getClass(), tagged);
}
JS_FRIEND_API(JSObject*)
JS_NewObjectWithUniqueType(JSContext* cx, const JSClass* clasp, HandleObject proto,
HandleObject parent)
{
/*
* Create our object with a null proto and then splice in the correct proto
* after we setSingleton, so that we don't pollute the default
* ObjectGroup attached to our proto with information about our object, since
* we're not going to be using that ObjectGroup anyway.
*/
RootedObject obj(cx, NewObjectWithGivenProto(cx, (const js::Class*)clasp, NullPtr(),
parent, SingletonObject));
if (!obj)
return nullptr;
if (!JS_SplicePrototype(cx, obj, proto))
return nullptr;
return obj;
}
JS_FRIEND_API(JSPrincipals*)
JS_GetCompartmentPrincipals(JSCompartment* compartment)
{
return compartment->principals;
}
JS_FRIEND_API(void)
JS_SetCompartmentPrincipals(JSCompartment* compartment, JSPrincipals* principals)
{
// Short circuit if there's no change.
if (principals == compartment->principals)
return;
// Any compartment with the trusted principals -- and there can be
// multiple -- is a system compartment.
const JSPrincipals* trusted = compartment->runtimeFromMainThread()->trustedPrincipals();
bool isSystem = principals && principals == trusted;
// Clear out the old principals, if any.
if (compartment->principals) {
JS_DropPrincipals(compartment->runtimeFromMainThread(), compartment->principals);
compartment->principals = nullptr;
// We'd like to assert that our new principals is always same-origin
// with the old one, but JSPrincipals doesn't give us a way to do that.
// But we can at least assert that we're not switching between system
// and non-system.
MOZ_ASSERT(compartment->isSystem == isSystem);
}
// Set up the new principals.
if (principals) {
JS_HoldPrincipals(principals);
compartment->principals = principals;
}
// Update the system flag.
compartment->isSystem = isSystem;
}
JS_FRIEND_API(JSPrincipals*)
JS_GetScriptPrincipals(JSScript* script)
{
return script->principals();
}
JS_FRIEND_API(bool)
JS_ScriptHasMutedErrors(JSScript* script)
{
return script->mutedErrors();
}
JS_FRIEND_API(bool)
JS_WrapPropertyDescriptor(JSContext* cx, JS::MutableHandle<js::PropertyDescriptor> desc)
{
return cx->compartment()->wrap(cx, desc);
}
JS_FRIEND_API(void)
JS_TraceShapeCycleCollectorChildren(JSTracer* trc, JS::GCCellPtr shape)
{
MOZ_ASSERT(shape.isShape());
MarkCycleCollectorChildren(trc, static_cast<Shape*>(shape.asCell()));
}
static bool
DefineHelpProperty(JSContext* cx, HandleObject obj, const char* prop, const char* value)
{
RootedAtom atom(cx, Atomize(cx, value, strlen(value)));
if (!atom)
return false;
return JS_DefineProperty(cx, obj, prop, atom,
JSPROP_READONLY | JSPROP_PERMANENT,
JS_STUBGETTER, JS_STUBSETTER);
}
JS_FRIEND_API(bool)
JS_DefineFunctionsWithHelp(JSContext* cx, HandleObject obj, const JSFunctionSpecWithHelp* fs)
{
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
for (; fs->name; fs++) {
JSAtom* atom = Atomize(cx, fs->name, strlen(fs->name));
if (!atom)
return false;
Rooted<jsid> id(cx, AtomToId(atom));
RootedFunction fun(cx, DefineFunction(cx, obj, id, fs->call, fs->nargs, fs->flags));
if (!fun)
return false;
if (fs->usage) {
if (!DefineHelpProperty(cx, fun, "usage", fs->usage))
return false;
}
if (fs->help) {
if (!DefineHelpProperty(cx, fun, "help", fs->help))
return false;
}
}
return true;
}
JS_FRIEND_API(bool)
js_ObjectClassIs(JSContext* cx, HandleObject obj, ESClassValue classValue)
{
return ObjectClassIs(obj, classValue, cx);
}
JS_FRIEND_API(const char*)
js_ObjectClassName(JSContext* cx, HandleObject obj)
{
return GetObjectClassName(cx, obj);
}
JS_FRIEND_API(JS::Zone*)
js::GetCompartmentZone(JSCompartment* comp)
{
return comp->zone();
}
JS_FRIEND_API(bool)
js::IsSystemCompartment(JSCompartment* comp)
{
return comp->isSystem;
}
JS_FRIEND_API(bool)
js::IsSystemZone(Zone* zone)
{
return zone->isSystem;
}
JS_FRIEND_API(bool)
js::IsAtomsCompartment(JSCompartment* comp)
{
return comp->runtimeFromAnyThread()->isAtomsCompartment(comp);
}
JS_FRIEND_API(bool)
js::IsInNonStrictPropertySet(JSContext* cx)
{
jsbytecode* pc;
JSScript* script = cx->currentScript(&pc, JSContext::ALLOW_CROSS_COMPARTMENT);
return script && !IsStrictSetPC(pc) && (js_CodeSpec[*pc].format & JOF_SET);
}
JS_FRIEND_API(bool)
js::IsFunctionObject(JSObject* obj)
{
return obj->is<JSFunction>();
}
JS_FRIEND_API(bool)
js::IsScopeObject(JSObject* obj)
{
return obj->is<ScopeObject>();
}
JS_FRIEND_API(bool)
js::IsCallObject(JSObject* obj)
{
return obj->is<CallObject>();
}
JS_FRIEND_API(JSObject*)
js::GetObjectParentMaybeScope(JSObject* obj)
{
return obj->enclosingScope();
}
JS_FRIEND_API(JSObject*)
js::GetGlobalForObjectCrossCompartment(JSObject* obj)
{
return &obj->global();
}
JS_FRIEND_API(JSObject*)
js::GetPrototypeNoProxy(JSObject* obj)
{
MOZ_ASSERT(!obj->is<js::ProxyObject>());
MOZ_ASSERT(!obj->getTaggedProto().isLazy());
return obj->getTaggedProto().toObjectOrNull();
}
JS_FRIEND_API(void)
js::SetPendingExceptionCrossContext(JSContext* cx, JS::HandleValue v)
{
cx->setPendingException(v);
}
JS_FRIEND_API(void)
js::AssertSameCompartment(JSContext* cx, JSObject* obj)
{
assertSameCompartment(cx, obj);
}
#ifdef DEBUG
JS_FRIEND_API(void)
js::AssertSameCompartment(JSObject* objA, JSObject* objB)
{
MOZ_ASSERT(objA->compartment() == objB->compartment());
}
#endif
JS_FRIEND_API(void)
js::NotifyAnimationActivity(JSObject* obj)
{
obj->compartment()->lastAnimationTime = PRMJ_Now();
}
JS_FRIEND_API(uint32_t)
js::GetObjectSlotSpan(JSObject* obj)
{
return obj->as<NativeObject>().slotSpan();
}
JS_FRIEND_API(bool)
js::IsObjectInContextCompartment(JSObject* obj, const JSContext* cx)
{
return obj->compartment() == cx->compartment();
}
JS_FRIEND_API(bool)
js::RunningWithTrustedPrincipals(JSContext* cx)
{
return cx->runningWithTrustedPrincipals();
}
JS_FRIEND_API(JSFunction*)
js::GetOutermostEnclosingFunctionOfScriptedCaller(JSContext* cx)
{
ScriptFrameIter iter(cx);
if (iter.done())
return nullptr;
if (!iter.isFunctionFrame())
return nullptr;
RootedFunction curr(cx, iter.callee(cx));
for (StaticScopeIter<NoGC> i(curr); !i.done(); i++) {
if (i.type() == StaticScopeIter<NoGC>::Function)
curr = &i.fun();
}
return curr;
}
JS_FRIEND_API(JSFunction*)
js::DefineFunctionWithReserved(JSContext* cx, JSObject* objArg, const char* name, JSNative call,
unsigned nargs, unsigned attrs)
{
RootedObject obj(cx, objArg);
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
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, JSFunction::ExtendedFinalizeKind);
}
JS_FRIEND_API(JSFunction*)
js::NewFunctionWithReserved(JSContext* cx, JSNative native, unsigned nargs, unsigned flags,
JSObject* parentArg, const char* name)
{
RootedObject parent(cx, parentArg);
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
CHECK_REQUEST(cx);
assertSameCompartment(cx, parent);
RootedAtom atom(cx);
if (name) {
atom = Atomize(cx, name, strlen(name));
if (!atom)
return nullptr;
}
JSFunction::Flags funFlags = JSAPIToJSFunctionFlags(flags);
return NewFunction(cx, NullPtr(), native, nargs, funFlags, parent, atom,
JSFunction::ExtendedFinalizeKind);
}
JS_FRIEND_API(JSFunction*)
js::NewFunctionByIdWithReserved(JSContext* cx, JSNative native, unsigned nargs, unsigned flags, JSObject* parentArg,
jsid id)
{
RootedObject parent(cx, parentArg);
MOZ_ASSERT(JSID_IS_STRING(id));
MOZ_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
CHECK_REQUEST(cx);
assertSameCompartment(cx, parent);
RootedAtom atom(cx, JSID_TO_ATOM(id));
JSFunction::Flags funFlags = JSAPIToJSFunctionFlags(flags);
return NewFunction(cx, NullPtr(), native, nargs, funFlags, parent, atom,
JSFunction::ExtendedFinalizeKind);
}
JS_FRIEND_API(const Value&)
js::GetFunctionNativeReserved(JSObject* fun, size_t which)
{
MOZ_ASSERT(fun->as<JSFunction>().isNative());
return fun->as<JSFunction>().getExtendedSlot(which);
}
JS_FRIEND_API(void)
js::SetFunctionNativeReserved(JSObject* fun, size_t which, const Value& val)
{
MOZ_ASSERT(fun->as<JSFunction>().isNative());
MOZ_ASSERT_IF(val.isObject(), val.toObject().compartment() == fun->compartment());
fun->as<JSFunction>().setExtendedSlot(which, val);
}
JS_FRIEND_API(bool)
js::GetObjectProto(JSContext* cx, JS::Handle<JSObject*> obj, JS::MutableHandle<JSObject*> proto)
{
if (IsProxy(obj))
return JS_GetPrototype(cx, obj, proto);
proto.set(reinterpret_cast<const shadow::Object*>(obj.get())->group->proto);
return true;
}
JS_FRIEND_API(bool)
js::GetOriginalEval(JSContext* cx, HandleObject scope, MutableHandleObject eval)
{
assertSameCompartment(cx, scope);
Rooted<GlobalObject*> global(cx, &scope->global());
return GlobalObject::getOrCreateEval(cx, global, eval);
}
JS_FRIEND_API(void)
js::SetReservedOrProxyPrivateSlotWithBarrier(JSObject* obj, size_t slot, const js::Value& value)
{
if (IsProxy(obj)) {
MOZ_ASSERT(slot == 0);
obj->as<ProxyObject>().setSameCompartmentPrivate(value);
} else {
obj->as<NativeObject>().setSlot(slot, value);
}
}
JS_FRIEND_API(bool)
js::GetGeneric(JSContext* cx, JSObject* objArg, JSObject* receiverArg, jsid idArg,
Value* vp)
{
RootedObject obj(cx, objArg), receiver(cx, receiverArg);
RootedId id(cx, idArg);
RootedValue value(cx);
if (!GetProperty(cx, obj, receiver, id, &value))
return false;
*vp = value;
return true;
}
void
js::SetPreserveWrapperCallback(JSRuntime* rt, PreserveWrapperCallback callback)
{
rt->preserveWrapperCallback = callback;
}
/*
* The below code is for temporary telemetry use. It can be removed when
* sufficient data has been harvested.
*/
namespace js {
// Defined in vm/GlobalObject.cpp.
extern size_t sSetProtoCalled;
}
JS_FRIEND_API(size_t)
JS_SetProtoCalled(JSContext*)
{
return sSetProtoCalled;
}
// Defined in jsiter.cpp.
extern size_t sCustomIteratorCount;
JS_FRIEND_API(size_t)
JS_GetCustomIteratorCount(JSContext* cx)
{
return sCustomIteratorCount;
}
JS_FRIEND_API(unsigned)
JS_PCToLineNumber(JSScript* script, jsbytecode* pc)
{
return PCToLineNumber(script, pc);
}
JS_FRIEND_API(bool)
JS_IsDeadWrapper(JSObject* obj)
{
return IsDeadProxyObject(obj);
}
void
js::TraceWeakMaps(WeakMapTracer* trc)
{
WeakMapBase::traceAllMappings(trc);
WatchpointMap::traceAll(trc);
}
extern JS_FRIEND_API(bool)
js::AreGCGrayBitsValid(JSRuntime* rt)
{
return rt->gc.areGrayBitsValid();
}
JS_FRIEND_API(bool)
js::ZoneGlobalsAreAllGray(JS::Zone* zone)
{
for (CompartmentsInZoneIter comp(zone); !comp.done(); comp.next()) {
JSObject* obj = comp->maybeGlobal();
if (!obj || !JS::ObjectIsMarkedGray(obj))
return false;
}
return true;
}
JS_FRIEND_API(JSGCTraceKind)
js::GCThingTraceKind(void* thing)
{
MOZ_ASSERT(thing);
return gc::GetGCThingTraceKind(thing);
}
JS_FRIEND_API(void)
js::VisitGrayWrapperTargets(Zone* zone, GCThingCallback callback, void* closure)
{
for (CompartmentsInZoneIter comp(zone); !comp.done(); comp.next()) {
for (JSCompartment::WrapperEnum e(comp); !e.empty(); e.popFront()) {
gc::Cell* thing = e.front().key().wrapped;
if (thing->isTenured() && thing->asTenured().isMarked(gc::GRAY))
callback(closure, JS::GCCellPtr(thing, thing->asTenured().getTraceKind()));
}
}
}
JS_FRIEND_API(JSObject*)
js::GetWeakmapKeyDelegate(JSObject* key)
{
if (JSWeakmapKeyDelegateOp op = key->getClass()->ext.weakmapKeyDelegateOp)
return op(key);
return nullptr;
}
JS_FRIEND_API(JSLinearString*)
js::StringToLinearStringSlow(JSContext* cx, JSString* str)
{
return str->ensureLinear(cx);
}
JS_FRIEND_API(void)
JS_SetAccumulateTelemetryCallback(JSRuntime* rt, JSAccumulateTelemetryDataCallback callback)
{
rt->setTelemetryCallback(rt, callback);
}
JS_FRIEND_API(JSObject*)
JS_CloneObject(JSContext* cx, HandleObject obj, HandleObject protoArg, HandleObject parent)
{
Rooted<TaggedProto> proto(cx, TaggedProto(protoArg.get()));
return CloneObject(cx, obj, proto, parent);
}
#ifdef DEBUG
JS_FRIEND_API(void)
js_DumpString(JSString* str)
{
str->dump();
}
JS_FRIEND_API(void)
js_DumpAtom(JSAtom* atom)
{
atom->dump();
}
JS_FRIEND_API(void)
js_DumpChars(const char16_t* s, size_t n)
{
fprintf(stderr, "char16_t * (%p) = ", (void*) s);
JSString::dumpChars(s, n);
fputc('\n', stderr);
}
JS_FRIEND_API(void)
js_DumpObject(JSObject* obj)
{
if (!obj) {
fprintf(stderr, "NULL\n");
return;
}
obj->dump();
}
#endif
static const char*
FormatValue(JSContext* cx, const Value& vArg, JSAutoByteString& bytes)
{
RootedValue v(cx, vArg);
if (v.isMagic(JS_OPTIMIZED_OUT))
return "[unavailable]";
/*
* We could use Maybe<AutoCompartment> here, but G++ can't quite follow
* that, and warns about uninitialized members being used in the
* destructor.
*/
RootedString str(cx);
if (v.isObject()) {
AutoCompartment ac(cx, &v.toObject());
str = ToString<CanGC>(cx, v);
} else {
str = ToString<CanGC>(cx, v);
}
if (!str)
return nullptr;
const char* buf = bytes.encodeLatin1(cx, str);
if (!buf)
return nullptr;
const char* found = strstr(buf, "function ");
if (found && (found - buf <= 2))
return "[function]";
return buf;
}
static char*
FormatFrame(JSContext* cx, const ScriptFrameIter& iter, char* buf, int num,
bool showArgs, bool showLocals, bool showThisProps)
{
MOZ_ASSERT(!cx->isExceptionPending());
RootedScript script(cx, iter.script());
jsbytecode* pc = iter.pc();
RootedObject scopeChain(cx, iter.scopeChain(cx));
JSAutoCompartment ac(cx, scopeChain);
const char* filename = script->filename();
unsigned lineno = PCToLineNumber(script, pc);
RootedFunction fun(cx, iter.maybeCallee(cx));
RootedString funname(cx);
if (fun)
funname = fun->displayAtom();
RootedValue thisVal(cx);
if (iter.hasUsableAbstractFramePtr() && iter.computeThis(cx)) {
thisVal = iter.computedThisValue();
}
// print the frame number and function name
if (funname) {
JSAutoByteString funbytes;
buf = JS_sprintf_append(buf, "%d %s(", num, funbytes.encodeLatin1(cx, funname));
} else if (fun) {
buf = JS_sprintf_append(buf, "%d anonymous(", num);
} else {
buf = JS_sprintf_append(buf, "%d <TOP LEVEL>", num);
}
if (!buf)
return buf;
if (showArgs && iter.hasArgs()) {
BindingIter bi(script);
bool first = true;
for (unsigned i = 0; i < iter.numActualArgs(); i++) {
RootedValue arg(cx);
if (i < iter.numFormalArgs() && script->formalIsAliased(i)) {
for (AliasedFormalIter fi(script); ; fi++) {
if (fi.frameIndex() == i) {
arg = iter.callObj(cx).aliasedVar(fi);
break;
}
}
} else if (script->argsObjAliasesFormals() && iter.hasArgsObj()) {
arg = iter.argsObj().arg(i);
} else {
if (iter.hasUsableAbstractFramePtr())
arg = iter.unaliasedActual(i, DONT_CHECK_ALIASING);
else
arg = MagicValue(JS_OPTIMIZED_OUT);
}
JSAutoByteString valueBytes;
const char* value = FormatValue(cx, arg, valueBytes);
JSAutoByteString nameBytes;
const char* name = nullptr;
if (i < iter.numFormalArgs()) {
MOZ_ASSERT(i == bi.argIndex());
name = nameBytes.encodeLatin1(cx, bi->name());
if (!buf)
return nullptr;
bi++;
}
if (value) {
buf = JS_sprintf_append(buf, "%s%s%s%s%s%s",
!first ? ", " : "",
name ? name :"",
name ? " = " : "",
arg.isString() ? "\"" : "",
value ? value : "?unknown?",
arg.isString() ? "\"" : "");
if (!buf)
return buf;
first = false;
} else {
buf = JS_sprintf_append(buf, " <Failed to get argument while inspecting stack frame>\n");
if (!buf)
return buf;
cx->clearPendingException();
}
}
}
// print filename and line number
buf = JS_sprintf_append(buf, "%s [\"%s\":%d]\n",
fun ? ")" : "",
filename ? filename : "<unknown>",
lineno);
if (!buf)
return buf;
// Note: Right now we don't dump the local variables anymore, because
// that is hard to support across all the JITs etc.
// print the value of 'this'
if (showLocals) {
if (!thisVal.isUndefined()) {
JSAutoByteString thisValBytes;
RootedString thisValStr(cx, ToString<CanGC>(cx, thisVal));
const char* str = nullptr;
if (thisValStr &&
(str = thisValBytes.encodeLatin1(cx, thisValStr)))
{
buf = JS_sprintf_append(buf, " this = %s\n", str);
if (!buf)
return buf;
} else {
buf = JS_sprintf_append(buf, " <failed to get 'this' value>\n");
cx->clearPendingException();
}
}
}
if (showThisProps && thisVal.isObject()) {
RootedObject obj(cx, &thisVal.toObject());
AutoIdVector keys(cx);
if (!GetPropertyKeys(cx, obj, JSITER_OWNONLY, &keys)) {
cx->clearPendingException();
return buf;
}
RootedId id(cx);
for (size_t i = 0; i < keys.length(); i++) {
RootedId id(cx, keys[i]);
RootedValue key(cx, IdToValue(id));
RootedValue v(cx);
if (!GetProperty(cx, obj, obj, id, &v)) {
buf = JS_sprintf_append(buf, " <Failed to fetch property while inspecting stack frame>\n");
cx->clearPendingException();
continue;
}
JSAutoByteString nameBytes;
JSAutoByteString valueBytes;
const char* name = FormatValue(cx, key, nameBytes);
const char* value = FormatValue(cx, v, valueBytes);
if (name && value) {
buf = JS_sprintf_append(buf, " this.%s = %s%s%s\n",
name,
v.isString() ? "\"" : "",
value,
v.isString() ? "\"" : "");
if (!buf)
return buf;
} else {
buf = JS_sprintf_append(buf, " <Failed to format values while inspecting stack frame>\n");
cx->clearPendingException();
}
}
}
MOZ_ASSERT(!cx->isExceptionPending());
return buf;
}
JS_FRIEND_API(char*)
JS::FormatStackDump(JSContext* cx, char* buf, bool showArgs, bool showLocals, bool showThisProps)
{
int num = 0;
for (AllFramesIter i(cx); !i.done(); ++i) {
buf = FormatFrame(cx, i, buf, num, showArgs, showLocals, showThisProps);
num++;
}
if (!num)
buf = JS_sprintf_append(buf, "JavaScript stack is empty\n");
return buf;
}
struct DumpHeapTracer : public JSTracer
{
FILE* output;
DumpHeapTracer(FILE* fp, JSRuntime* rt, JSTraceCallback callback,
WeakMapTraceKind weakTraceKind)
: JSTracer(rt, callback, weakTraceKind), output(fp)
{}
};
static char
MarkDescriptor(void* thing)
{
gc::TenuredCell* cell = gc::TenuredCell::fromPointer(thing);
if (cell->isMarked(gc::BLACK))
return cell->isMarked(gc::GRAY) ? 'G' : 'B';
else
return cell->isMarked(gc::GRAY) ? 'X' : 'W';
}
static void
DumpHeapVisitZone(JSRuntime* rt, void* data, Zone* zone)
{
DumpHeapTracer* dtrc = static_cast<DumpHeapTracer*>(data);
fprintf(dtrc->output, "# zone %p\n", (void*)zone);
}
static void
DumpHeapVisitCompartment(JSRuntime* rt, void* data, JSCompartment* comp)
{
char name[1024];
if (rt->compartmentNameCallback)
(*rt->compartmentNameCallback)(rt, comp, name, sizeof(name));
else
strcpy(name, "<unknown>");
DumpHeapTracer* dtrc = static_cast<DumpHeapTracer*>(data);
fprintf(dtrc->output, "# compartment %s [in zone %p]\n", name, (void*)comp->zone());
}
static void
DumpHeapVisitArena(JSRuntime* rt, void* data, gc::Arena* arena,
JSGCTraceKind traceKind, size_t thingSize)
{
DumpHeapTracer* dtrc = static_cast<DumpHeapTracer*>(data);
fprintf(dtrc->output, "# arena allockind=%u size=%u\n",
unsigned(arena->aheader.getAllocKind()), unsigned(thingSize));
}
static void
DumpHeapVisitCell(JSRuntime* rt, void* data, void* thing,
JSGCTraceKind traceKind, size_t thingSize)
{
DumpHeapTracer* dtrc = static_cast<DumpHeapTracer*>(data);
char cellDesc[1024 * 32];
JS_GetTraceThingInfo(cellDesc, sizeof(cellDesc), dtrc, thing, traceKind, true);
fprintf(dtrc->output, "%p %c %s\n", thing, MarkDescriptor(thing), cellDesc);
JS_TraceChildren(dtrc, thing, traceKind);
}
static void
DumpHeapVisitChild(JSTracer* trc, void** thingp, JSGCTraceKind kind)
{
if (gc::IsInsideNursery((js::gc::Cell*)*thingp))
return;
DumpHeapTracer* dtrc = static_cast<DumpHeapTracer*>(trc);
char buffer[1024];
fprintf(dtrc->output, "> %p %c %s\n", *thingp, MarkDescriptor(*thingp),
dtrc->getTracingEdgeName(buffer, sizeof(buffer)));
}
static void
DumpHeapVisitRoot(JSTracer* trc, void** thingp, JSGCTraceKind kind)
{
if (gc::IsInsideNursery((js::gc::Cell*)*thingp))
return;
DumpHeapTracer* dtrc = static_cast<DumpHeapTracer*>(trc);
char buffer[1024];
fprintf(dtrc->output, "%p %c %s\n", *thingp, MarkDescriptor(*thingp),
dtrc->getTracingEdgeName(buffer, sizeof(buffer)));
}
void
js::DumpHeapComplete(JSRuntime* rt, FILE* fp, js::DumpHeapNurseryBehaviour nurseryBehaviour)
{
if (nurseryBehaviour == js::CollectNurseryBeforeDump)
rt->gc.evictNursery(JS::gcreason::API);
DumpHeapTracer dtrc(fp, rt, DumpHeapVisitRoot, TraceWeakMapKeysValues);
TraceRuntime(&dtrc);
fprintf(dtrc.output, "==========\n");
dtrc.setTraceCallback(DumpHeapVisitChild);
IterateZonesCompartmentsArenasCells(rt, &dtrc,
DumpHeapVisitZone,
DumpHeapVisitCompartment,
DumpHeapVisitArena,
DumpHeapVisitCell);
fflush(dtrc.output);
}
JS_FRIEND_API(const JSStructuredCloneCallbacks*)
js::GetContextStructuredCloneCallbacks(JSContext* cx)
{
return cx->runtime()->structuredCloneCallbacks;
}
JS_FRIEND_API(bool)
js::ContextHasOutstandingRequests(const JSContext* cx)
{
return cx->outstandingRequests > 0;
}
JS_FRIEND_API(void)
js::SetActivityCallback(JSRuntime* rt, ActivityCallback cb, void* arg)
{
rt->activityCallback = cb;
rt->activityCallbackArg = arg;
}
JS_FRIEND_API(bool)
js::IsContextRunningJS(JSContext* cx)
{
return cx->currentlyRunning();
}
JS_FRIEND_API(int64_t)
GetMaxGCPauseSinceClear(JSRuntime* rt)
{
return rt->gc.stats.getMaxGCPauseSinceClear();
}
JS_FRIEND_API(int64_t)
ClearMaxGCPauseAccumulator(JSRuntime* rt)
{
return rt->gc.stats.clearMaxGCPauseAccumulator();
}
JS_FRIEND_API(void)
JS::NotifyDidPaint(JSRuntime* rt)
{
rt->gc.notifyDidPaint();
}
JS_FRIEND_API(void)
JS::PokeGC(JSRuntime* rt)
{
rt->gc.poke();
}
JS_FRIEND_API(JSCompartment*)
js::GetAnyCompartmentInZone(JS::Zone* zone)
{
CompartmentsInZoneIter comp(zone);
MOZ_ASSERT(!comp.done());
return comp.get();
}
void
JS::ObjectPtr::updateWeakPointerAfterGC()
{
if (js::gc::IsObjectAboutToBeFinalized(value.unsafeGet()))
value = nullptr;
}
void
JS::ObjectPtr::trace(JSTracer* trc, const char* name)
{
JS_CallObjectTracer(trc, &value, name);
}
JS_FRIEND_API(JSObject*)
js::GetTestingFunctions(JSContext* cx)
{
RootedObject obj(cx, JS_NewPlainObject(cx));
if (!obj)
return nullptr;
if (!DefineTestingFunctions(cx, obj, false))
return nullptr;
return obj;
}
#ifdef DEBUG
JS_FRIEND_API(unsigned)
js::GetEnterCompartmentDepth(JSContext* cx)
{
return cx->getEnterCompartmentDepth();
}
#endif
JS_FRIEND_API(void)
js::SetDOMCallbacks(JSRuntime* rt, const DOMCallbacks* callbacks)
{
rt->DOMcallbacks = callbacks;
}
JS_FRIEND_API(const DOMCallbacks*)
js::GetDOMCallbacks(JSRuntime* rt)
{
return rt->DOMcallbacks;
}
static const void* gDOMProxyHandlerFamily = nullptr;
static uint32_t gDOMProxyExpandoSlot = 0;
static DOMProxyShadowsCheck gDOMProxyShadowsCheck;
JS_FRIEND_API(void)
js::SetDOMProxyInformation(const void* domProxyHandlerFamily, uint32_t domProxyExpandoSlot,
DOMProxyShadowsCheck domProxyShadowsCheck)
{
gDOMProxyHandlerFamily = domProxyHandlerFamily;
gDOMProxyExpandoSlot = domProxyExpandoSlot;
gDOMProxyShadowsCheck = domProxyShadowsCheck;
}
const void*
js::GetDOMProxyHandlerFamily()
{
return gDOMProxyHandlerFamily;
}
uint32_t
js::GetDOMProxyExpandoSlot()
{
return gDOMProxyExpandoSlot;
}
DOMProxyShadowsCheck
js::GetDOMProxyShadowsCheck()
{
return gDOMProxyShadowsCheck;
}
bool
js::detail::IdMatchesAtom(jsid id, JSAtom* atom)
{
return id == INTERNED_STRING_TO_JSID(nullptr, atom);
}
JS_FRIEND_API(JSContext*)
js::DefaultJSContext(JSRuntime* rt)
{
if (rt->defaultJSContextCallback) {
JSContext* cx = rt->defaultJSContextCallback(rt);
MOZ_ASSERT(cx);
return cx;
}
MOZ_ASSERT(rt->contextList.getFirst() == rt->contextList.getLast());
return rt->contextList.getFirst();
}
JS_FRIEND_API(void)
js::SetDefaultJSContextCallback(JSRuntime* rt, DefaultJSContextCallback cb)
{
rt->defaultJSContextCallback = cb;
}
#ifdef DEBUG
JS_FRIEND_API(void)
js::Debug_SetActiveJSContext(JSRuntime* rt, JSContext* cx)
{
rt->activeContext = cx;
}
#endif
JS_FRIEND_API(void)
js::SetCTypesActivityCallback(JSRuntime* rt, CTypesActivityCallback cb)
{
rt->ctypesActivityCallback = cb;
}
js::AutoCTypesActivityCallback::AutoCTypesActivityCallback(JSContext* cx,
js::CTypesActivityType beginType,
js::CTypesActivityType endType
MOZ_GUARD_OBJECT_NOTIFIER_PARAM_IN_IMPL)
: cx(cx), callback(cx->runtime()->ctypesActivityCallback), endType(endType)
{
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
if (callback)
callback(cx, beginType);
}
JS_FRIEND_API(void)
js::SetObjectMetadataCallback(JSContext* cx, ObjectMetadataCallback callback)
{
cx->compartment()->setObjectMetadataCallback(callback);
}
JS_FRIEND_API(bool)
js::SetObjectMetadata(JSContext* cx, HandleObject obj, HandleObject metadata)
{
return JSObject::setMetadata(cx, obj, metadata);
}
JS_FRIEND_API(JSObject*)
js::GetObjectMetadata(JSObject* obj)
{
return obj->getMetadata();
}
JS_FRIEND_API(bool)
js_DefineOwnProperty(JSContext* cx, JSObject* objArg, jsid idArg,
JS::Handle<js::PropertyDescriptor> descriptor, bool* bp)
{
RootedObject obj(cx, objArg);
RootedId id(cx, idArg);
js::AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id, descriptor.value());
if (descriptor.hasGetterObject())
assertSameCompartment(cx, descriptor.getterObject());
if (descriptor.hasSetterObject())
assertSameCompartment(cx, descriptor.setterObject());
return StandardDefineProperty(cx, obj, id, descriptor, bp);
}
JS_FRIEND_API(bool)
js_ReportIsNotFunction(JSContext* cx, JS::HandleValue v)
{
return ReportIsNotFunction(cx, v);
}
JS_FRIEND_API(void)
js::ReportErrorWithId(JSContext* cx, const char* msg, HandleId id)
{
RootedValue idv(cx);
if (!JS_IdToValue(cx, id, &idv))
return;
JSString* idstr = JS::ToString(cx, idv);
if (!idstr)
return;
JSAutoByteString bytes(cx, idstr);
if (!bytes)
return;
JS_ReportError(cx, msg, bytes.ptr());
}
#ifdef DEBUG
bool
js::HasObjectMovedOp(JSObject* obj) {
return !!GetObjectClass(obj)->ext.objectMovedOp;
}
#endif
JS_FRIEND_API(void)
JS_StoreObjectPostBarrierCallback(JSContext* cx,
void (*callback)(JSTracer* trc, JSObject* key, void* data),
JSObject* key, void* data)
{
JSRuntime* rt = cx->runtime();
if (IsInsideNursery(key))
rt->gc.storeBuffer.putCallback(callback, key, data);
}
extern JS_FRIEND_API(void)
JS_StoreStringPostBarrierCallback(JSContext* cx,
void (*callback)(JSTracer* trc, JSString* key, void* data),
JSString* key, void* data)
{
JSRuntime* rt = cx->runtime();
if (IsInsideNursery(key))
rt->gc.storeBuffer.putCallback(callback, key, data);
}
JS_FRIEND_API(bool)
js::ForwardToNative(JSContext* cx, JSNative native, const CallArgs& args)
{
return native(cx, args.length(), args.base());
}