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gecko/js/src/jsapi.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 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 "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 "jsproxy.h"
#include "jsscript.h"
#include "jsstr.h"
#include "jstypes.h"
#include "jsutil.h"
#include "jswatchpoint.h"
#include "jsweakmap.h"
#ifdef JS_THREADSAFE
#include "jsworkers.h"
#endif
#include "jswrapper.h"
#include "prmjtime.h"
#if ENABLE_YARR_JIT
#include "assembler/jit/ExecutableAllocator.h"
#endif
#include "builtin/Eval.h"
#include "builtin/Intl.h"
#include "builtin/MapObject.h"
#include "builtin/RegExp.h"
#ifdef ENABLE_BINARYDATA
#include "builtin/SIMD.h"
#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 "jit/AsmJSLink.h"
#include "jit/JitCommon.h"
#include "js/CharacterEncoding.h"
#include "js/SliceBudget.h"
#include "js/StructuredClone.h"
#if ENABLE_INTL_API
#include "unicode/uclean.h"
#include "unicode/utypes.h"
#endif // ENABLE_INTL_API
#include "vm/DateObject.h"
#include "vm/Debugger.h"
#include "vm/ErrorObject.h"
#include "vm/Interpreter.h"
#include "vm/NumericConversions.h"
#include "vm/RegExpStatics.h"
#include "vm/Runtime.h"
#include "vm/Shape.h"
#include "vm/SharedArrayObject.h"
#include "vm/StopIterationObject.h"
#include "vm/StringBuffer.h"
#include "vm/TypedArrayObject.h"
#include "vm/WeakMapObject.h"
#include "vm/WrapperObject.h"
#include "vm/Xdr.h"
#include "yarr/BumpPointerAllocator.h"
#include "jsatominlines.h"
#include "jsfuninlines.h"
#include "jsinferinlines.h"
#include "jsscriptinlines.h"
#include "vm/Interpreter-inl.h"
#include "vm/ObjectImpl-inl.h"
#include "vm/String-inl.h"
using namespace js;
using namespace js::gc;
using namespace js::types;
using mozilla::Maybe;
using mozilla::PodCopy;
using mozilla::PodZero;
using js::frontend::Parser;
#ifdef HAVE_VA_LIST_AS_ARRAY
#define JS_ADDRESSOF_VA_LIST(ap) ((va_list *)(ap))
#else
#define JS_ADDRESSOF_VA_LIST(ap) (&(ap))
#endif
/* Make sure that jschar is two bytes unsigned integer */
JS_STATIC_ASSERT((jschar)-1 > 0);
JS_STATIC_ASSERT(sizeof(jschar) == 2);
JS_PUBLIC_API(int64_t)
JS_Now()
{
return PRMJ_Now();
}
JS_PUBLIC_API(jsval)
JS_GetNaNValue(JSContext *cx)
{
return cx->runtime()->NaNValue;
}
JS_PUBLIC_API(jsval)
JS_GetNegativeInfinityValue(JSContext *cx)
{
return cx->runtime()->negativeInfinityValue;
}
JS_PUBLIC_API(jsval)
JS_GetPositiveInfinityValue(JSContext *cx)
{
return cx->runtime()->positiveInfinityValue;
}
JS_PUBLIC_API(jsval)
JS_GetEmptyStringValue(JSContext *cx)
{
return STRING_TO_JSVAL(cx->runtime()->emptyString);
}
JS_PUBLIC_API(JSString *)
JS_GetEmptyString(JSRuntime *rt)
{
JS_ASSERT(rt->hasContexts());
return rt->emptyString;
}
namespace js {
void
AssertHeapIsIdle(JSRuntime *rt)
{
JS_ASSERT(rt->heapState == js::Idle);
}
void
AssertHeapIsIdle(JSContext *cx)
{
AssertHeapIsIdle(cx->runtime());
}
}
static void
AssertHeapIsIdleOrIterating(JSRuntime *rt)
{
JS_ASSERT(!rt->isHeapCollecting());
}
static void
AssertHeapIsIdleOrIterating(JSContext *cx)
{
AssertHeapIsIdleOrIterating(cx->runtime());
}
static void
AssertHeapIsIdleOrStringIsFlat(JSContext *cx, JSString *str)
{
/*
* We allow some functions to be called during a GC as long as the argument
* is a flat string, since that will not cause allocation.
*/
JS_ASSERT_IF(cx->runtime()->isHeapBusy(), str->isFlat());
}
JS_PUBLIC_API(bool)
JS_ConvertArguments(JSContext *cx, const CallArgs &args, const char *format, ...)
{
va_list ap;
bool ok;
AssertHeapIsIdle(cx);
va_start(ap, format);
ok = JS_ConvertArgumentsVA(cx, args, format, ap);
va_end(ap);
return ok;
}
JS_PUBLIC_API(bool)
JS_ConvertArgumentsVA(JSContext *cx, const CallArgs &args, const char *format, va_list ap)
{
unsigned index = 0;
bool required;
char c;
double d;
JSString *str;
RootedObject obj(cx);
RootedValue val(cx);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, args);
required = true;
while ((c = *format++) != '\0') {
if (isspace(c))
continue;
if (c == '/') {
required = false;
continue;
}
if (index == args.length()) {
if (required) {
if (JSFunction *fun = ReportIfNotFunction(cx, args.calleev())) {
char numBuf[12];
JS_snprintf(numBuf, sizeof numBuf, "%u", args.length());
JSAutoByteString funNameBytes;
if (const char *name = GetFunctionNameBytes(cx, fun, &funNameBytes)) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr,
JSMSG_MORE_ARGS_NEEDED,
name, numBuf, (args.length() == 1) ? "" : "s");
}
}
return false;
}
break;
}
MutableHandleValue arg = args[index++];
switch (c) {
case 'b':
*va_arg(ap, bool *) = ToBoolean(arg);
break;
case 'c':
if (!ToUint16(cx, arg, va_arg(ap, uint16_t *)))
return false;
break;
case 'i':
case 'j': // "j" was broken, you should not use it.
if (!ToInt32(cx, arg, va_arg(ap, int32_t *)))
return false;
break;
case 'u':
if (!ToUint32(cx, arg, va_arg(ap, uint32_t *)))
return false;
break;
case 'd':
if (!ToNumber(cx, arg, va_arg(ap, double *)))
return false;
break;
case 'I':
if (!ToNumber(cx, arg, &d))
return false;
*va_arg(ap, double *) = ToInteger(d);
break;
case 'S':
case 'W':
str = ToString<CanGC>(cx, arg);
if (!str)
return false;
arg.setString(str);
if (c == 'W') {
JSFlatString *flat = str->ensureFlat(cx);
if (!flat)
return false;
*va_arg(ap, const jschar **) = flat->chars();
} else {
*va_arg(ap, JSString **) = str;
}
break;
case 'o':
if (arg.isNullOrUndefined()) {
obj = nullptr;
} else {
obj = ToObject(cx, arg);
if (!obj)
return false;
}
arg.setObjectOrNull(obj);
*va_arg(ap, JSObject **) = obj;
break;
case 'f':
obj = ReportIfNotFunction(cx, arg);
if (!obj)
return false;
arg.setObject(*obj);
*va_arg(ap, JSFunction **) = &obj->as<JSFunction>();
break;
case 'v':
*va_arg(ap, jsval *) = arg;
break;
case '*':
break;
default:
JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_BAD_CHAR, format);
return false;
}
}
return true;
}
JS_PUBLIC_API(bool)
JS_ConvertValue(JSContext *cx, HandleValue value, JSType type, MutableHandleValue vp)
{
bool ok;
RootedObject obj(cx);
JSString *str;
double d;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
switch (type) {
case JSTYPE_VOID:
vp.setUndefined();
ok = true;
break;
case JSTYPE_OBJECT:
if (value.isNullOrUndefined()) {
obj.set(nullptr);
} else {
obj = ToObject(cx, value);
if (!obj)
return false;
}
ok = true;
break;
case JSTYPE_FUNCTION:
vp.set(value);
obj = ReportIfNotFunction(cx, vp);
ok = (obj != nullptr);
break;
case JSTYPE_STRING:
str = ToString<CanGC>(cx, value);
ok = (str != nullptr);
if (ok)
vp.setString(str);
break;
case JSTYPE_NUMBER:
ok = ToNumber(cx, value, &d);
if (ok)
vp.setDouble(d);
break;
case JSTYPE_BOOLEAN:
vp.setBoolean(ToBoolean(value));
return true;
default: {
char numBuf[12];
JS_snprintf(numBuf, sizeof numBuf, "%d", (int)type);
JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_BAD_TYPE, numBuf);
ok = false;
break;
}
}
return ok;
}
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(int32_t)
JS_DoubleToInt32(double d)
{
return ToInt32(d);
}
JS_PUBLIC_API(uint32_t)
JS_DoubleToUint32(double d)
{
return ToUint32(d);
}
JS_PUBLIC_API(JSType)
JS_TypeOfValue(JSContext *cx, HandleValue value)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
return TypeOfValue(value);
}
JS_PUBLIC_API(const char *)
JS_GetTypeName(JSContext *cx, JSType type)
{
if ((unsigned)type >= (unsigned)JSTYPE_LIMIT)
return nullptr;
return TypeStrings[type];
}
JS_PUBLIC_API(bool)
JS_StrictlyEqual(JSContext *cx, jsval value1, jsval value2, bool *equal)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value1, value2);
bool eq;
if (!StrictlyEqual(cx, value1, value2, &eq))
return false;
*equal = eq;
return true;
}
JS_PUBLIC_API(bool)
JS_LooselyEqual(JSContext *cx, HandleValue value1, HandleValue value2, bool *equal)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value1, value2);
JS_ASSERT(equal);
return LooselyEqual(cx, value1, value2, equal);
}
JS_PUBLIC_API(bool)
JS_SameValue(JSContext *cx, jsval value1, jsval value2, bool *same)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value1, value2);
bool s;
if (!SameValue(cx, value1, value2, &s))
return false;
*same = s;
return true;
}
JS_PUBLIC_API(bool)
JS_IsBuiltinEvalFunction(JSFunction *fun)
{
return IsAnyBuiltinEval(fun);
}
JS_PUBLIC_API(bool)
JS_IsBuiltinFunctionConstructor(JSFunction *fun)
{
return fun->isBuiltinFunctionConstructor();
}
/************************************************************************/
/*
* SpiderMonkey's initialization status is tracked here, and it controls things
* that should happen only once across all runtimes. It's an API requirement
* that JS_Init (and JS_ShutDown, if called) be called in a thread-aware
* manner, so this variable doesn't need to be atomic.
*
* The only reason at present for the restriction that you can't call
* JS_Init/stuff/JS_ShutDown multiple times is the Windows PRMJ NowInit
* initialization code, which uses PR_CallOnce to initialize the PRMJ_Now
* subsystem. (For reinitialization to be permitted, we'd need to "reset" the
* called-once status -- doable, but more trouble than it's worth now.)
* Initializing that subsystem from JS_Init eliminates the problem, but
* initialization can take a comparatively long time (15ms or so), so we
* really don't want to do it in JS_Init, and we really do want to do it only
* when PRMJ_Now is eventually called.
*/
enum InitState { Uninitialized, Running, ShutDown };
static InitState jsInitState = Uninitialized;
#ifdef DEBUG
static void
CheckMessageNumbering()
{
// Assert that the numbers associated with the error names in js.msg are
// monotonically increasing. It's not a compile-time check, but it's
// better than nothing.
int errorNumber = 0;
# define MSG_DEF(name, number, count, exception, format) \
JS_ASSERT(name == errorNumber++);
# include "js.msg"
# undef MSG_DEF
}
static unsigned
MessageParameterCount(const char *format)
{
unsigned numfmtspecs = 0;
for (const char *fmt = format; *fmt != '\0'; fmt++) {
if (*fmt == '{' && isdigit(fmt[1]))
++numfmtspecs;
}
return numfmtspecs;
}
static void
CheckMessageParameterCounts()
{
// Assert that each message format has the correct number of braced
// parameters.
# define MSG_DEF(name, number, count, exception, format) \
JS_BEGIN_MACRO \
JS_ASSERT(MessageParameterCount(format) == count); \
JS_END_MACRO;
# include "js.msg"
# undef MSG_DEF
}
#endif /* DEBUG */
JS_PUBLIC_API(bool)
JS_Init(void)
{
MOZ_ASSERT(jsInitState == Uninitialized,
"must call JS_Init once before any JSAPI operation except "
"JS_SetICUMemoryFunctions");
MOZ_ASSERT(!JSRuntime::hasLiveRuntimes(),
"how do we have live runtimes before JS_Init?");
#ifdef DEBUG
CheckMessageNumbering();
CheckMessageParameterCounts();
#endif
using js::TlsPerThreadData;
if (!TlsPerThreadData.initialized() && !TlsPerThreadData.init())
return false;
#if defined(JS_ION)
if (!jit::InitializeIon())
return false;
#endif
if (!ForkJoinContext::initialize())
return false;
#if EXPOSE_INTL_API
UErrorCode err = U_ZERO_ERROR;
u_init(&err);
if (U_FAILURE(err))
return false;
#endif // EXPOSE_INTL_API
jsInitState = Running;
return true;
}
JS_PUBLIC_API(void)
JS_ShutDown(void)
{
MOZ_ASSERT(jsInitState == Running,
"JS_ShutDown must only be called after JS_Init and can't race with it");
#ifdef DEBUG
if (JSRuntime::hasLiveRuntimes()) {
// Gecko is too buggy to assert this just yet.
fprintf(stderr,
"WARNING: YOU ARE LEAKING THE WORLD (at least one JSRuntime "
"and everything alive inside it, that is) AT JS_ShutDown "
"TIME. FIX THIS!\n");
}
#endif
#ifdef JS_THREADSAFE
WorkerThreadState().finish();
#endif
PRMJ_NowShutdown();
#if EXPOSE_INTL_API
u_cleanup();
#endif // EXPOSE_INTL_API
jsInitState = ShutDown;
}
#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, JSUseHelperThreads useHelperThreads, JSRuntime *parentRuntime)
{
MOZ_ASSERT(jsInitState == Running,
"must call JS_Init prior to creating any JSRuntimes");
// Any parent runtime should be the topmost parent. This assert
// isn't required for correctness, but ensuring that the parent
// runtime is not destroyed before this one is more easily done
// for the main runtime in the process.
JS_ASSERT_IF(parentRuntime, !parentRuntime->parentRuntime);
JSRuntime *rt = js_new<JSRuntime>(parentRuntime, useHelperThreads);
if (!rt)
return nullptr;
if (!rt->init(maxbytes)) {
JS_DestroyRuntime(rt);
return nullptr;
}
return rt;
}
JS_PUBLIC_API(void)
JS_DestroyRuntime(JSRuntime *rt)
{
js_delete(rt);
}
JS_PUBLIC_API(bool)
JS_SetICUMemoryFunctions(JS_ICUAllocFn allocFn, JS_ICUReallocFn reallocFn, JS_ICUFreeFn freeFn)
{
MOZ_ASSERT(jsInitState == Uninitialized,
"must call JS_SetICUMemoryFunctions before any other JSAPI "
"operation (including JS_Init)");
#if EXPOSE_INTL_API
UErrorCode status = U_ZERO_ERROR;
u_setMemoryFunctions(/* context = */ nullptr, allocFn, reallocFn, freeFn, &status);
return U_SUCCESS(status);
#else
return true;
#endif
}
JS_PUBLIC_API(void *)
JS_GetRuntimePrivate(JSRuntime *rt)
{
return rt->data;
}
JS_PUBLIC_API(void)
JS_SetRuntimePrivate(JSRuntime *rt, void *data)
{
rt->data = data;
}
#ifdef JS_THREADSAFE
static void
StartRequest(JSContext *cx)
{
JSRuntime *rt = cx->runtime();
JS_ASSERT(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();
JS_ASSERT(CurrentThreadCanAccessRuntime(rt));
JS_ASSERT(rt->requestDepth != 0);
if (rt->requestDepth != 1) {
rt->requestDepth--;
} else {
rt->conservativeGC.updateForRequestEnd();
rt->requestDepth = 0;
rt->triggerActivityCallback(false);
}
}
#endif /* JS_THREADSAFE */
JS_PUBLIC_API(void)
JS_BeginRequest(JSContext *cx)
{
#ifdef JS_THREADSAFE
cx->outstandingRequests++;
StartRequest(cx);
#endif
}
JS_PUBLIC_API(void)
JS_EndRequest(JSContext *cx)
{
#ifdef JS_THREADSAFE
JS_ASSERT(cx->outstandingRequests != 0);
cx->outstandingRequests--;
StopRequest(cx);
#endif
}
JS_PUBLIC_API(bool)
JS_IsInRequest(JSRuntime *rt)
{
#ifdef JS_THREADSAFE
JS_ASSERT(CurrentThreadCanAccessRuntime(rt));
return rt->requestDepth != 0;
#else
return false;
#endif
}
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)
{
JS_ASSERT(!cx->compartment());
DestroyContext(cx, DCM_FORCE_GC);
}
JS_PUBLIC_API(void)
JS_DestroyContextNoGC(JSContext *cx)
{
JS_ASSERT(!cx->compartment());
DestroyContext(cx, DCM_NO_GC);
}
JS_PUBLIC_API(void *)
JS_GetContextPrivate(JSContext *cx)
{
return cx->data;
}
JS_PUBLIC_API(void)
JS_SetContextPrivate(JSContext *cx, void *data)
{
cx->data = data;
}
JS_PUBLIC_API(void *)
JS_GetSecondContextPrivate(JSContext *cx)
{
return cx->data2;
}
JS_PUBLIC_API(void)
JS_SetSecondContextPrivate(JSContext *cx, void *data)
{
cx->data2 = data;
}
JS_PUBLIC_API(JSRuntime *)
JS_GetRuntime(JSContext *cx)
{
return cx->runtime();
}
JS_PUBLIC_API(JSRuntime *)
JS_GetParentRuntime(JSContext *cx)
{
JSRuntime *rt = cx->runtime();
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->options().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_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(JSCompartment *)
JS_EnterCompartmentOfScript(JSContext *cx, JSScript *target)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
GlobalObject &global = target->global();
return JS_EnterCompartment(cx, &global);
}
JS_PUBLIC_API(void)
JS_LeaveCompartment(JSContext *cx, JSCompartment *oldCompartment)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
cx->leaveCompartment(oldCompartment);
}
JSAutoCompartment::JSAutoCompartment(JSContext *cx, JSObject *target)
: cx_(cx),
oldCompartment_(cx->compartment())
{
AssertHeapIsIdleOrIterating(cx_);
cx_->enterCompartment(target->compartment());
}
JSAutoCompartment::JSAutoCompartment(JSContext *cx, JSScript *target)
: cx_(cx),
oldCompartment_(cx->compartment())
{
AssertHeapIsIdleOrIterating(cx_);
cx_->enterCompartment(target->compartment());
}
JSAutoCompartment::~JSAutoCompartment()
{
cx_->leaveCompartment(oldCompartment_);
}
JS_PUBLIC_API(void)
JS_SetCompartmentPrivate(JSCompartment *compartment, void *data)
{
compartment->data = data;
}
JS_PUBLIC_API(void *)
JS_GetCompartmentPrivate(JSCompartment *compartment)
{
return compartment->data;
}
JS_PUBLIC_API(void)
JS_SetZoneUserData(JS::Zone *zone, void *data)
{
zone->data = data;
}
JS_PUBLIC_API(void *)
JS_GetZoneUserData(JS::Zone *zone)
{
return zone->data;
}
JS_PUBLIC_API(bool)
JS_WrapObject(JSContext *cx, MutableHandleObject objp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (objp)
JS::ExposeGCThingToActiveJS(objp, JSTRACE_OBJECT);
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);
}
JS_PUBLIC_API(bool)
JS_WrapId(JSContext *cx, JS::MutableHandleId idp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
jsid id = idp.get();
if (JSID_IS_STRING(id))
JS::ExposeGCThingToActiveJS(JSID_TO_STRING(id), JSTRACE_STRING);
else if (JSID_IS_OBJECT(id))
JS::ExposeGCThingToActiveJS(JSID_TO_OBJECT(id), JSTRACE_OBJECT);
return cx->compartment()->wrapId(cx, idp.address());
}
/*
* 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);
JS_ASSERT(origobj != target);
JS_ASSERT(!origobj->is<CrossCompartmentWrapperObject>());
JS_ASSERT(!target->is<CrossCompartmentWrapperObject>());
AutoMaybeTouchDeadZones agc(cx);
AutoDisableProxyCheck adpc(cx->runtime());
JSCompartment *destination = target->compartment();
RootedValue origv(cx, ObjectValue(*origobj));
RootedObject newIdentity(cx);
if (origobj->compartment() == destination) {
// If the original object is in the same compartment as the
// destination, then we know that we won't find a wrapper in the
// destination's cross compartment map and that the same
// object will continue to work.
if (!JSObject::swap(cx, origobj, target))
MOZ_CRASH();
newIdentity = origobj;
} else if (WrapperMap::Ptr p = destination->lookupWrapper(origv)) {
// There might already be a wrapper for the original object in
// the new compartment. If there is, we use its identity and swap
// in the contents of |target|.
newIdentity = &p->value().toObject();
// When we remove origv from the wrapper map, its wrapper, newIdentity,
// must immediately cease to be a cross-compartment wrapper. Neuter it.
destination->removeWrapper(p);
NukeCrossCompartmentWrapper(cx, newIdentity);
if (!JSObject::swap(cx, newIdentity, target))
MOZ_CRASH();
} else {
// Otherwise, we use |target| for the new identity object.
newIdentity = target;
}
// Now, iterate through other scopes looking for references to the
// old object, and update the relevant cross-compartment wrappers.
if (!RemapAllWrappersForObject(cx, origobj, newIdentity))
MOZ_CRASH();
// Lastly, update the original object to point to the new one.
if (origobj->compartment() != destination) {
RootedObject newIdentityWrapper(cx, newIdentity);
AutoCompartment ac(cx, origobj);
if (!JS_WrapObject(cx, &newIdentityWrapper))
MOZ_CRASH();
JS_ASSERT(Wrapper::wrappedObject(newIdentityWrapper) == newIdentity);
if (!JSObject::swap(cx, origobj, newIdentityWrapper))
MOZ_CRASH();
origobj->compartment()->putWrapper(cx, ObjectValue(*newIdentity), origv);
}
// The new identity object might be one of several things. Return it to avoid
// ambiguity.
return newIdentity;
}
/*
* Recompute all cross-compartment wrappers for an object, resetting state.
* Gecko uses this to clear Xray wrappers when doing a navigation that reuses
* the inner window and global object.
*/
JS_PUBLIC_API(bool)
JS_RefreshCrossCompartmentWrappers(JSContext *cx, HandleObject obj)
{
return RemapAllWrappersForObject(cx, obj, obj);
}
JS_PUBLIC_API(bool)
JS_InitStandardClasses(JSContext *cx, HandleObject obj)
{
JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
cx->setDefaultCompartmentObjectIfUnset(obj);
assertSameCompartment(cx, obj);
Rooted<GlobalObject*> global(cx, &obj->global());
return GlobalObject::initStandardClasses(cx, global);
}
#define CLASP(name) (&name##Class)
#define OCLASP(name) (&name##Object::class_)
#define TYPED_ARRAY_CLASP(type) (&TypedArrayObject::classes[ScalarTypeDescr::type])
#define EAGER_ATOM(name) NAME_OFFSET(name)
#define EAGER_CLASS_ATOM(name) NAME_OFFSET(name)
static js::Class DummyClass;
static js::Class SentinelClass;
typedef struct JSStdName {
size_t atomOffset; /* offset of atom pointer in JSAtomState */
const Class *clasp;
bool isDummy() const { return clasp == &DummyClass; };
bool isSentinel() const { return clasp == &SentinelClass; };
} JSStdName;
static const JSStdName*
LookupStdName(JSRuntime *rt, HandleString name, const JSStdName *table)
{
MOZ_ASSERT(name->isAtom());
for (unsigned i = 0; !table[i].isSentinel(); i++) {
if (table[i].isDummy())
continue;
JSAtom *atom = AtomStateOffsetToName(*rt->commonNames, 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_CLASS_ATOM(name), clasp },
#define STD_DUMMY_ENTRY(name, code, init, dummy) { 0, &DummyClass },
static const JSStdName standard_class_names[] = {
JS_FOR_PROTOTYPES(STD_NAME_ENTRY, STD_DUMMY_ENTRY)
{ 0, &SentinelClass }
};
/*
* Table of top-level function and constant names and the init function of the
* corresponding standard class that sets them up.
*/
static const JSStdName builtin_property_names[] = {
{ EAGER_ATOM(eval), &JSObject::class_ },
/* Global properties and functions defined by the Number class. */
{ EAGER_ATOM(NaN), OCLASP(Number) },
{ EAGER_ATOM(Infinity), OCLASP(Number) },
{ EAGER_ATOM(isNaN), OCLASP(Number) },
{ EAGER_ATOM(isFinite), OCLASP(Number) },
{ EAGER_ATOM(parseFloat), OCLASP(Number) },
{ EAGER_ATOM(parseInt), OCLASP(Number) },
/* String global functions. */
{ EAGER_ATOM(escape), OCLASP(String) },
{ EAGER_ATOM(unescape), OCLASP(String) },
{ EAGER_ATOM(decodeURI), OCLASP(String) },
{ EAGER_ATOM(encodeURI), OCLASP(String) },
{ EAGER_ATOM(decodeURIComponent), OCLASP(String) },
{ EAGER_ATOM(encodeURIComponent), OCLASP(String) },
#if JS_HAS_UNEVAL
{ EAGER_ATOM(uneval), OCLASP(String) },
#endif
#ifdef ENABLE_BINARYDATA
{ EAGER_ATOM(SIMD), OCLASP(SIMD) },
{ EAGER_ATOM(TypedObject), OCLASP(TypedObjectModule) },
#endif
{ 0, &SentinelClass }
};
#undef CLASP
#undef TYPED_ARRAY_CLASP
#undef EAGER_ATOM
#undef EAGER_CLASS_ATOM
#undef EAGER_ATOM_CLASP
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;
RootedString idstr(cx, JSID_TO_STRING(id));
/* Check whether we're resolving 'undefined', and define it if so. */
JSAtom *undefinedAtom = cx->names().undefined;
if (idstr == undefinedAtom) {
*resolved = true;
return JSObject::defineProperty(cx, obj, undefinedAtom->asPropertyName(),
UndefinedHandleValue,
JS_PropertyStub, JS_StrictPropertyStub,
JSPROP_PERMANENT | JSPROP_READONLY);
}
/* Try for class constructors/prototypes named by well-known atoms. */
stdnm = LookupStdName(rt, idstr, standard_class_names);
/* Try less frequently used top-level functions and constants. */
if (!stdnm)
stdnm = LookupStdName(rt, idstr, builtin_property_names);
// If this class is anonymous, then it doesn't exist as a global
// property, so we won't resolve anything.
if (stdnm && !(stdnm->clasp->flags & JSCLASS_IS_ANONYMOUS)) {
JSProtoKey key = JSCLASS_CACHED_PROTO_KEY(stdnm->clasp);
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_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);
}
JS_PUBLIC_API(JSProtoKey)
JS_IdToProtoKey(JSContext *cx, HandleId id)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!JSID_IS_ATOM(id))
return JSProto_Null;
RootedString idstr(cx, JSID_TO_STRING(id));
const JSStdName *stdnm = LookupStdName(cx->runtime(), idstr, standard_class_names);
if (!stdnm)
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_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>();
}
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(jsval)
JS_ComputeThis(JSContext *cx, jsval *vp)
{
AssertHeapIsIdle(cx);
assertSameCompartment(cx, JSValueArray(vp, 2));
CallReceiver call = CallReceiverFromVp(vp);
if (!BoxNonStrictThis(cx, call))
return JSVAL_NULL;
return call.thisv();
}
JS_PUBLIC_API(void *)
JS_malloc(JSContext *cx, size_t nbytes)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return cx->malloc_(nbytes);
}
JS_PUBLIC_API(void *)
JS_realloc(JSContext *cx, void *p, size_t nbytes)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return cx->realloc_(p, nbytes);
}
JS_PUBLIC_API(void)
JS_free(JSContext *cx, void *p)
{
return js_free(p);
}
JS_PUBLIC_API(void)
JS_freeop(JSFreeOp *fop, void *p)
{
return FreeOp::get(fop)->free_(p);
}
JS_PUBLIC_API(JSFreeOp *)
JS_GetDefaultFreeOp(JSRuntime *rt)
{
return rt->defaultFreeOp();
}
JS_PUBLIC_API(void)
JS_updateMallocCounter(JSContext *cx, size_t nbytes)
{
return cx->runtime()->updateMallocCounter(cx->zone(), nbytes);
}
JS_PUBLIC_API(char *)
JS_strdup(JSContext *cx, const char *s)
{
AssertHeapIsIdle(cx);
return js_strdup(cx, s);
}
JS_PUBLIC_API(char *)
JS_strdup(JSRuntime *rt, const char *s)
{
AssertHeapIsIdle(rt);
size_t n = strlen(s) + 1;
void *p = rt->malloc_(n);
if (!p)
return nullptr;
return static_cast<char*>(js_memcpy(p, s, n));
}
#undef JS_AddRoot
JS_PUBLIC_API(bool)
JS_AddValueRoot(JSContext *cx, jsval *vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return AddValueRoot(cx, vp, nullptr);
}
JS_PUBLIC_API(bool)
JS_AddStringRoot(JSContext *cx, JSString **rp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return AddStringRoot(cx, rp, nullptr);
}
JS_PUBLIC_API(bool)
JS_AddObjectRoot(JSContext *cx, JSObject **rp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return AddObjectRoot(cx, rp, nullptr);
}
JS_PUBLIC_API(bool)
JS_AddNamedValueRoot(JSContext *cx, jsval *vp, const char *name)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return AddValueRoot(cx, vp, name);
}
JS_PUBLIC_API(bool)
JS_AddNamedValueRootRT(JSRuntime *rt, jsval *vp, const char *name)
{
return AddValueRootRT(rt, vp, name);
}
JS_PUBLIC_API(bool)
JS_AddNamedStringRoot(JSContext *cx, JSString **rp, const char *name)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return AddStringRoot(cx, rp, name);
}
JS_PUBLIC_API(bool)
JS_AddNamedObjectRoot(JSContext *cx, JSObject **rp, const char *name)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return AddObjectRoot(cx, rp, name);
}
JS_PUBLIC_API(bool)
JS_AddNamedScriptRoot(JSContext *cx, JSScript **rp, const char *name)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return AddScriptRoot(cx, rp, name);
}
/* We allow unrooting from finalizers within the GC */
JS_PUBLIC_API(void)
JS_RemoveValueRoot(JSContext *cx, jsval *vp)
{
CHECK_REQUEST(cx);
RemoveRoot(cx->runtime(), (void *)vp);
}
JS_PUBLIC_API(void)
JS_RemoveStringRoot(JSContext *cx, JSString **rp)
{
CHECK_REQUEST(cx);
RemoveRoot(cx->runtime(), (void *)rp);
}
JS_PUBLIC_API(void)
JS_RemoveObjectRoot(JSContext *cx, JSObject **rp)
{
CHECK_REQUEST(cx);
RemoveRoot(cx->runtime(), (void *)rp);
}
JS_PUBLIC_API(void)
JS_RemoveScriptRoot(JSContext *cx, JSScript **rp)
{
CHECK_REQUEST(cx);
RemoveRoot(cx->runtime(), (void *)rp);
}
JS_PUBLIC_API(void)
JS_RemoveValueRootRT(JSRuntime *rt, jsval *vp)
{
RemoveRoot(rt, (void *)vp);
}
JS_PUBLIC_API(void)
JS_RemoveStringRootRT(JSRuntime *rt, JSString **rp)
{
RemoveRoot(rt, (void *)rp);
}
JS_PUBLIC_API(void)
JS_RemoveObjectRootRT(JSRuntime *rt, JSObject **rp)
{
RemoveRoot(rt, (void *)rp);
}
JS_PUBLIC_API(void)
JS_RemoveScriptRootRT(JSRuntime *rt, JSScript **rp)
{
RemoveRoot(rt, (void *)rp);
}
JS_PUBLIC_API(bool)
JS_AddExtraGCRootsTracer(JSRuntime *rt, JSTraceDataOp traceOp, void *data)
{
AssertHeapIsIdle(rt);
return !!rt->gcBlackRootTracers.append(JSRuntime::ExtraTracer(traceOp, data));
}
JS_PUBLIC_API(void)
JS_RemoveExtraGCRootsTracer(JSRuntime *rt, JSTraceDataOp traceOp, void *data)
{
AssertHeapIsIdle(rt);
for (size_t i = 0; i < rt->gcBlackRootTracers.length(); i++) {
JSRuntime::ExtraTracer *e = &rt->gcBlackRootTracers[i];
if (e->op == traceOp && e->data == data) {
rt->gcBlackRootTracers.erase(e);
break;
}
}
}
#ifdef DEBUG
typedef struct JSHeapDumpNode JSHeapDumpNode;
struct JSHeapDumpNode {
void *thing;
JSGCTraceKind kind;
JSHeapDumpNode *next; /* next sibling */
JSHeapDumpNode *parent; /* node with the thing that refer to thing
from this node */
char edgeName[1]; /* name of the edge from parent->thing
into thing */
};
typedef HashSet<void *, PointerHasher<void *, 3>, SystemAllocPolicy> VisitedSet;
typedef struct JSDumpingTracer {
JSTracer base;
VisitedSet visited;
bool ok;
void *startThing;
void *thingToFind;
void *thingToIgnore;
JSHeapDumpNode *parentNode;
JSHeapDumpNode **lastNodep;
char buffer[200];
} JSDumpingTracer;
static void
DumpNotify(JSTracer *trc, void **thingp, JSGCTraceKind kind)
{
JS_ASSERT(trc->callback == DumpNotify);
JSDumpingTracer *dtrc = (JSDumpingTracer *)trc;
void *thing = *thingp;
if (!dtrc->ok || thing == dtrc->thingToIgnore)
return;
/*
* Check if we have already seen thing unless it is thingToFind to include
* it to the graph each time we reach it and print all live things that
* refer to thingToFind.
*
* This does not print all possible paths leading to thingToFind since
* when a thing A refers directly or indirectly to thingToFind and A is
* present several times in the graph, we will print only the first path
* leading to A and thingToFind, other ways to reach A will be ignored.
*/
if (dtrc->thingToFind != thing) {
/*
* The startThing check allows to avoid putting startThing into the
* hash table before tracing startThing in JS_DumpHeap.
*/
if (thing == dtrc->startThing)
return;
VisitedSet::AddPtr p = dtrc->visited.lookupForAdd(thing);
if (p)
return;
if (!dtrc->visited.add(p, thing)) {
dtrc->ok = false;
return;
}
}
const char *edgeName = JS_GetTraceEdgeName(&dtrc->base, dtrc->buffer, sizeof(dtrc->buffer));
size_t edgeNameSize = strlen(edgeName) + 1;
size_t bytes = offsetof(JSHeapDumpNode, edgeName) + edgeNameSize;
JSHeapDumpNode *node = (JSHeapDumpNode *) js_malloc(bytes);
if (!node) {
dtrc->ok = false;
return;
}
node->thing = thing;
node->kind = kind;
node->next = nullptr;
node->parent = dtrc->parentNode;
js_memcpy(node->edgeName, edgeName, edgeNameSize);
JS_ASSERT(!*dtrc->lastNodep);
*dtrc->lastNodep = node;
dtrc->lastNodep = &node->next;
}
/* Dump node and the chain that leads to thing it contains. */
static bool
DumpNode(JSDumpingTracer *dtrc, FILE* fp, JSHeapDumpNode *node)
{
JSHeapDumpNode *prev, *following;
size_t chainLimit;
enum { MAX_PARENTS_TO_PRINT = 10 };
JS_GetTraceThingInfo(dtrc->buffer, sizeof dtrc->buffer,
&dtrc->base, node->thing, node->kind, true);
if (fprintf(fp, "%p %-22s via ", node->thing, dtrc->buffer) < 0)
return false;
/*
* We need to print the parent chain in the reverse order. To do it in
* O(N) time where N is the chain length we first reverse the chain while
* searching for the top and then print each node while restoring the
* chain order.
*/
chainLimit = MAX_PARENTS_TO_PRINT;
prev = nullptr;
for (;;) {
following = node->parent;
node->parent = prev;
prev = node;
node = following;
if (!node)
break;
if (chainLimit == 0) {
if (fputs("...", fp) < 0)
return false;
break;
}
--chainLimit;
}
node = prev;
prev = following;
bool ok = true;
do {
/* Loop must continue even when !ok to restore the parent chain. */
if (ok) {
if (!prev) {
/* Print edge from some runtime root or startThing. */
if (fputs(node->edgeName, fp) < 0)
ok = false;
} else {
JS_GetTraceThingInfo(dtrc->buffer, sizeof dtrc->buffer,
&dtrc->base, prev->thing, prev->kind,
false);
if (fprintf(fp, "(%p %s).%s",
prev->thing, dtrc->buffer, node->edgeName) < 0) {
ok = false;
}
}
}
following = node->parent;
node->parent = prev;
prev = node;
node = following;
} while (node);
return ok && putc('\n', fp) >= 0;
}
JS_PUBLIC_API(bool)
JS_DumpHeap(JSRuntime *rt, FILE *fp, void* startThing, JSGCTraceKind startKind,
void *thingToFind, size_t maxDepth, void *thingToIgnore)
{
if (maxDepth == 0)
return true;
JSDumpingTracer dtrc;
if (!dtrc.visited.init())
return false;
JS_TracerInit(&dtrc.base, rt, DumpNotify);
dtrc.ok = true;
dtrc.startThing = startThing;
dtrc.thingToFind = thingToFind;
dtrc.thingToIgnore = thingToIgnore;
dtrc.parentNode = nullptr;
JSHeapDumpNode *node = nullptr;
dtrc.lastNodep = &node;
if (!startThing) {
JS_ASSERT(startKind == JSTRACE_OBJECT);
TraceRuntime(&dtrc.base);
} else {
JS_TraceChildren(&dtrc.base, startThing, startKind);
}
if (!node)
return dtrc.ok;
size_t depth = 1;
JSHeapDumpNode *children, *next, *parent;
bool thingToFindWasTraced = thingToFind && thingToFind == startThing;
for (;;) {
/*
* Loop must continue even when !dtrc.ok to free all nodes allocated
* so far.
*/
if (dtrc.ok) {
if (thingToFind == nullptr || thingToFind == node->thing)
dtrc.ok = DumpNode(&dtrc, fp, node);
/* Descend into children. */
if (dtrc.ok &&
depth < maxDepth &&
(thingToFind != node->thing || !thingToFindWasTraced)) {
dtrc.parentNode = node;
children = nullptr;
dtrc.lastNodep = &children;
JS_TraceChildren(&dtrc.base, node->thing, node->kind);
if (thingToFind == node->thing)
thingToFindWasTraced = true;
if (children != nullptr) {
++depth;
node = children;
continue;
}
}
}
/* Move to next or parents next and free the node. */
for (;;) {
next = node->next;
parent = node->parent;
js_free(node);
node = next;
if (node)
break;
if (!parent)
return dtrc.ok;
JS_ASSERT(depth > 1);
--depth;
node = parent;
}
}
JS_ASSERT(depth == 1);
return dtrc.ok;
}
#endif /* DEBUG */
extern JS_PUBLIC_API(bool)
JS_IsGCMarkingTracer(JSTracer *trc)
{
return IS_GC_MARKING_TRACER(trc);
}
#ifdef DEBUG
extern JS_PUBLIC_API(bool)
JS_IsMarkingGray(JSTracer *trc)
{
JS_ASSERT(JS_IsGCMarkingTracer(trc));
return trc->callback == GCMarker::GrayCallback;
}
#endif
JS_PUBLIC_API(void)
JS_GC(JSRuntime *rt)
{
AssertHeapIsIdle(rt);
JS::PrepareForFullGC(rt);
GC(rt, GC_NORMAL, JS::gcreason::API);
}
JS_PUBLIC_API(void)
JS_MaybeGC(JSContext *cx)
{
MaybeGC(cx);
}
JS_PUBLIC_API(void)
JS_SetGCCallback(JSRuntime *rt, JSGCCallback cb, void *data)
{
AssertHeapIsIdle(rt);
rt->gcCallback = cb;
rt->gcCallbackData = data;
}
JS_PUBLIC_API(void)
JS_SetFinalizeCallback(JSRuntime *rt, JSFinalizeCallback cb)
{
AssertHeapIsIdle(rt);
rt->gcFinalizeCallback = cb;
}
JS_PUBLIC_API(bool)
JS_IsAboutToBeFinalized(JS::Heap<JSObject *> *objp)
{
return IsObjectAboutToBeFinalized(objp->unsafeGet());
}
JS_PUBLIC_API(bool)
JS_IsAboutToBeFinalizedUnbarriered(JSObject **objp)
{
return IsObjectAboutToBeFinalized(objp);
}
JS_PUBLIC_API(void)
JS_SetGCParameter(JSRuntime *rt, JSGCParamKey key, uint32_t value)
{
switch (key) {
case JSGC_MAX_BYTES: {
JS_ASSERT(value >= rt->gcBytes);
rt->gcMaxBytes = value;
break;
}
case JSGC_MAX_MALLOC_BYTES:
rt->setGCMaxMallocBytes(value);
break;
case JSGC_SLICE_TIME_BUDGET:
rt->gcSliceBudget = SliceBudget::TimeBudget(value);
break;
case JSGC_MARK_STACK_LIMIT:
js::SetMarkStackLimit(rt, value);
break;
case JSGC_HIGH_FREQUENCY_TIME_LIMIT:
rt->gcHighFrequencyTimeThreshold = value;
break;
case JSGC_HIGH_FREQUENCY_LOW_LIMIT:
rt->gcHighFrequencyLowLimitBytes = value * 1024 * 1024;
break;
case JSGC_HIGH_FREQUENCY_HIGH_LIMIT:
rt->gcHighFrequencyHighLimitBytes = value * 1024 * 1024;
break;
case JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MAX:
rt->gcHighFrequencyHeapGrowthMax = value / 100.0;
break;
case JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MIN:
rt->gcHighFrequencyHeapGrowthMin = value / 100.0;
break;
case JSGC_LOW_FREQUENCY_HEAP_GROWTH:
rt->gcLowFrequencyHeapGrowth = value / 100.0;
break;
case JSGC_DYNAMIC_HEAP_GROWTH:
rt->gcDynamicHeapGrowth = value;
break;
case JSGC_DYNAMIC_MARK_SLICE:
rt->gcDynamicMarkSlice = value;
break;
case JSGC_ALLOCATION_THRESHOLD:
rt->gcAllocationThreshold = value * 1024 * 1024;
break;
case JSGC_DECOMMIT_THRESHOLD:
rt->gcDecommitThreshold = value * 1024 * 1024;
break;
default:
JS_ASSERT(key == JSGC_MODE);
rt->setGCMode(JSGCMode(value));
JS_ASSERT(rt->gcMode() == JSGC_MODE_GLOBAL ||
rt->gcMode() == JSGC_MODE_COMPARTMENT ||
rt->gcMode() == JSGC_MODE_INCREMENTAL);
return;
}
}
JS_PUBLIC_API(uint32_t)
JS_GetGCParameter(JSRuntime *rt, JSGCParamKey key)
{
switch (key) {
case JSGC_MAX_BYTES:
return uint32_t(rt->gcMaxBytes);
case JSGC_MAX_MALLOC_BYTES:
return rt->gcMaxMallocBytes;
case JSGC_BYTES:
return uint32_t(rt->gcBytes);
case JSGC_MODE:
return uint32_t(rt->gcMode());
case JSGC_UNUSED_CHUNKS:
return uint32_t(rt->gcChunkPool.getEmptyCount());
case JSGC_TOTAL_CHUNKS:
return uint32_t(rt->gcChunkSet.count() + rt->gcChunkPool.getEmptyCount());
case JSGC_SLICE_TIME_BUDGET:
return uint32_t(rt->gcSliceBudget > 0 ? rt->gcSliceBudget / PRMJ_USEC_PER_MSEC : 0);
case JSGC_MARK_STACK_LIMIT:
return rt->gcMarker.maxCapacity();
case JSGC_HIGH_FREQUENCY_TIME_LIMIT:
return rt->gcHighFrequencyTimeThreshold;
case JSGC_HIGH_FREQUENCY_LOW_LIMIT:
return rt->gcHighFrequencyLowLimitBytes / 1024 / 1024;
case JSGC_HIGH_FREQUENCY_HIGH_LIMIT:
return rt->gcHighFrequencyHighLimitBytes / 1024 / 1024;
case JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MAX:
return uint32_t(rt->gcHighFrequencyHeapGrowthMax * 100);
case JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MIN:
return uint32_t(rt->gcHighFrequencyHeapGrowthMin * 100);
case JSGC_LOW_FREQUENCY_HEAP_GROWTH:
return uint32_t(rt->gcLowFrequencyHeapGrowth * 100);
case JSGC_DYNAMIC_HEAP_GROWTH:
return rt->gcDynamicHeapGrowth;
case JSGC_DYNAMIC_MARK_SLICE:
return rt->gcDynamicMarkSlice;
case JSGC_ALLOCATION_THRESHOLD:
return rt->gcAllocationThreshold / 1024 / 1024;
default:
JS_ASSERT(key == JSGC_NUMBER);
return uint32_t(rt->gcNumber);
}
}
JS_PUBLIC_API(void)
JS_SetGCParameterForThread(JSContext *cx, JSGCParamKey key, uint32_t value)
{
JS_ASSERT(key == JSGC_MAX_CODE_CACHE_BYTES);
}
JS_PUBLIC_API(uint32_t)
JS_GetGCParameterForThread(JSContext *cx, JSGCParamKey key)
{
JS_ASSERT(key == JSGC_MAX_CODE_CACHE_BYTES);
return 0;
}
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},
// This are the current default settings but this is likely inverted as
// explained for the computation of Next_GC in Bug 863398 comment 21.
{JSGC_HIGH_FREQUENCY_HIGH_LIMIT, 100},
{JSGC_HIGH_FREQUENCY_LOW_LIMIT, 500},
{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 jschar *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
SetNativeStackQuota(JSRuntime *rt, StackKind kind, size_t stackSize)
{
rt->nativeStackQuota[kind] = stackSize;
if (rt->nativeStackBase)
RecomputeStackLimit(rt, kind);
}
void
js::RecomputeStackLimit(JSRuntime *rt, StackKind kind)
{
size_t stackSize = rt->nativeStackQuota[kind];
#if JS_STACK_GROWTH_DIRECTION > 0
if (stackSize == 0) {
rt->mainThread.nativeStackLimit[kind] = UINTPTR_MAX;
} else {
JS_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 {
JS_ASSERT(rt->nativeStackBase >= stackSize);
rt->mainThread.nativeStackLimit[kind] =
rt->nativeStackBase - (stackSize - 1);
}
#endif
// If there's no pending interrupt request set on the runtime's main thread's
// jitStackLimit, then update it so that it reflects the new nativeStacklimit.
//
// Note that, for now, we use the untrusted limit for ion. This is fine,
// because it's the most conservative limit, and if we hit it, we'll bail
// out of ion into the interpeter, which will do a proper recursion check.
#ifdef JS_ION
if (kind == StackForUntrustedScript) {
JSRuntime::AutoLockForInterrupt lock(rt);
if (rt->mainThread.jitStackLimit != uintptr_t(-1)) {
rt->mainThread.jitStackLimit = rt->mainThread.nativeStackLimit[kind];
#ifdef JS_ARM_SIMULATOR
rt->mainThread.jitStackLimit = jit::Simulator::StackLimit();
#endif
}
}
#endif
}
JS_PUBLIC_API(void)
JS_SetNativeStackQuota(JSRuntime *rt, size_t systemCodeStackSize,
size_t trustedScriptStackSize,
size_t untrustedScriptStackSize)
{
JS_ASSERT_IF(trustedScriptStackSize,
trustedScriptStackSize < systemCodeStackSize);
if (!trustedScriptStackSize)
trustedScriptStackSize = systemCodeStackSize;
JS_ASSERT_IF(untrustedScriptStackSize,
untrustedScriptStackSize < trustedScriptStackSize);
if (!untrustedScriptStackSize)
untrustedScriptStackSize = trustedScriptStackSize;
SetNativeStackQuota(rt, StackForSystemCode, systemCodeStackSize);
SetNativeStackQuota(rt, StackForTrustedScript, trustedScriptStackSize);
SetNativeStackQuota(rt, StackForUntrustedScript, untrustedScriptStackSize);
}
/************************************************************************/
JS_PUBLIC_API(int)
JS_IdArrayLength(JSContext *cx, JSIdArray *ida)
{
return ida->length;
}
JS_PUBLIC_API(jsid)
JS_IdArrayGet(JSContext *cx, JSIdArray *ida, int index)
{
JS_ASSERT(index >= 0 && index < ida->length);
return ida->vector[index];
}
JS_PUBLIC_API(void)
JS_DestroyIdArray(JSContext *cx, JSIdArray *ida)
{
cx->runtime()->defaultFreeOp()->free_(ida);
}
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_DefaultValue(JSContext *cx, HandleObject obj, JSType hint, MutableHandleValue vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JS_ASSERT(obj != nullptr);
JS_ASSERT(hint == JSTYPE_VOID || hint == JSTYPE_STRING || hint == JSTYPE_NUMBER);
return JSObject::defaultValue(cx, obj, hint, vp);
}
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, bool strict, MutableHandleValue vp)
{
return true;
}
JS_PUBLIC_API(bool)
JS_DeletePropertyStub(JSContext *cx, HandleObject obj, HandleId id, bool *succeeded)
{
*succeeded = true;
return true;
}
JS_PUBLIC_API(bool)
JS_EnumerateStub(JSContext *cx, HandleObject obj)
{
return true;
}
JS_PUBLIC_API(bool)
JS_ResolveStub(JSContext *cx, HandleObject obj, HandleId id)
{
return true;
}
JS_PUBLIC_API(bool)
JS_ConvertStub(JSContext *cx, HandleObject obj, JSType type, MutableHandleValue vp)
{
JS_ASSERT(type != JSTYPE_OBJECT && type != JSTYPE_FUNCTION);
JS_ASSERT(obj);
return DefaultValue(cx, obj, type, vp);
}
JS_PUBLIC_API(JSObject *)
JS_InitClass(JSContext *cx, 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 js_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->getPrivate();
}
JS_PUBLIC_API(void)
JS_SetPrivate(JSObject *obj, void *data)
{
/* This function can be called by a finalizer. */
obj->setPrivate(data);
}
JS_PUBLIC_API(void *)
JS_GetInstancePrivate(JSContext *cx, HandleObject obj, const JSClass *clasp, CallArgs *args)
{
if (!JS_InstanceOf(cx, obj, clasp, args))
return nullptr;
return obj->getPrivate();
}
JS_PUBLIC_API(bool)
JS_GetPrototype(JSContext *cx, JS::Handle<JSObject*> obj, JS::MutableHandle<JSObject*> protop)
{
return JSObject::getProto(cx, obj, protop);
}
JS_PUBLIC_API(bool)
JS_SetPrototype(JSContext *cx, JS::Handle<JSObject*> obj, JS::Handle<JSObject*> proto)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, proto);
bool succeeded;
if (!JSObject::setProto(cx, obj, proto, &succeeded))
return false;
if (!succeeded) {
RootedValue val(cx, ObjectValue(*obj));
js_ReportValueError(cx, JSMSG_SETPROTOTYPEOF_FAIL, JSDVG_IGNORE_STACK, val, js::NullPtr());
return false;
}
return true;
}
JS_PUBLIC_API(JSObject *)
JS_GetParent(JSObject *obj)
{
JS_ASSERT(!obj->is<ScopeObject>());
return obj->getParent();
}
JS_PUBLIC_API(bool)
JS_SetParent(JSContext *cx, HandleObject obj, HandleObject parent)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JS_ASSERT(!obj->is<ScopeObject>());
JS_ASSERT(parent || !obj->getParent());
assertSameCompartment(cx, obj, parent);
return JSObject::setParent(cx, obj, parent);
}
JS_PUBLIC_API(JSObject *)
JS_GetConstructor(JSContext *cx, HandleObject proto)
{
RootedValue cval(cx);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, proto);
{
JSAutoResolveFlags rf(cx, 0);
if (!JSObject::getProperty(cx, proto, proto, cx->names().constructor, &cval))
return nullptr;
}
if (!IsFunctionObject(cval)) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_NO_CONSTRUCTOR,
proto->getClass()->name);
return nullptr;
}
return &cval.toObject();
}
JS_PUBLIC_API(bool)
JS_GetObjectId(JSContext *cx, HandleObject obj, MutableHandleId idp)
{
AssertHeapIsIdle(cx);
assertSameCompartment(cx, obj);
#ifdef JSGC_GENERATIONAL
// Ensure that the object is tenured before returning it.
if (IsInsideNursery(cx->runtime(), obj)) {
MinorGC(cx, JS::gcreason::EVICT_NURSERY);
MOZ_ASSERT(!IsInsideNursery(cx->runtime(), obj));
}
#endif
idp.set(OBJECT_TO_JSID(obj));
return true;
}
namespace {
class AutoCompartmentRooter : private JS::CustomAutoRooter
{
public:
explicit AutoCompartmentRooter(JSContext *cx, JSCompartment *comp
MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
: CustomAutoRooter(cx), compartment(comp)
{
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
}
operator JSCompartment *() {
return compartment;
}
JSCompartment *operator->() {
return compartment;
}
protected:
virtual void trace(JSTracer *trc)
{
compartment->mark();
}
private:
JSCompartment *compartment;
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
};
} /* anonymous namespace */
bool
JS::CompartmentOptions::cloneSingletons(JSContext *cx) const
{
return cloneSingletonsOverride_.get(cx->options().cloneSingletons());
}
JS::CompartmentOptions &
JS::CompartmentOptions::setZone(ZoneSpecifier spec)
{
zone_.spec = spec;
return *this;
}
JS::CompartmentOptions &
JS::CompartmentOptions::setSameZoneAs(JSObject *obj)
{
zone_.pointer = static_cast<void *>(obj->zone());
return *this;
}
JS::CompartmentOptions &
JS::CompartmentOptionsRef(JSCompartment *compartment)
{
return compartment->options();
}
JS::CompartmentOptions &
JS::CompartmentOptionsRef(JSContext *cx)
{
return cx->compartment()->options();
}
JS_PUBLIC_API(JSObject *)
JS_NewGlobalObject(JSContext *cx, const JSClass *clasp, JSPrincipals *principals,
JS::OnNewGlobalHookOption hookOption,
const JS::CompartmentOptions &options /* = JS::CompartmentOptions() */)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
JS_ASSERT(!cx->isExceptionPending());
JSRuntime *rt = cx->runtime();
Zone *zone;
if (options.zoneSpecifier() == JS::SystemZone)
zone = rt->systemZone;
else if (options.zoneSpecifier() == JS::FreshZone)
zone = nullptr;
else
zone = static_cast<Zone *>(options.zonePointer());
AutoCompartmentRooter compartment(cx, NewCompartment(cx, zone, principals, options));
if (!compartment)
return nullptr;
// Lazily create the system zone.
if (!rt->systemZone && options.zoneSpecifier() == JS::SystemZone) {
rt->systemZone = compartment->zone();
rt->systemZone->isSystem = true;
}
Rooted<GlobalObject *> global(cx);
{
AutoCompartment ac(cx, compartment);
global = GlobalObject::create(cx, Valueify(clasp));
}
if (!global)
return nullptr;
if (hookOption == JS::FireOnNewGlobalHook)
JS_FireOnNewGlobalObject(cx, global);
return global;
}
JS_PUBLIC_API(void)
JS_GlobalObjectTraceHook(JSTracer *trc, JSObject *global)
{
JS_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);
JSTraceOp trace = global->compartment()->options().getTrace();
if (trace)
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, HandleObject proto, HandleObject parent)
{
JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, proto, parent);
const Class *clasp = Valueify(jsclasp);
if (!clasp)
clasp = &JSObject::class_; /* default class is Object */
JS_ASSERT(clasp != &JSFunction::class_);
JS_ASSERT(!(clasp->flags & JSCLASS_IS_GLOBAL));
JSObject *obj = NewObjectWithClassProto(cx, clasp, proto, parent);
JS_ASSERT_IF(obj, obj->getParent());
return obj;
}
JS_PUBLIC_API(JSObject *)
JS_NewObjectWithGivenProto(JSContext *cx, const JSClass *jsclasp, HandleObject proto, HandleObject parent)
{
JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, proto, parent);
const Class *clasp = Valueify(jsclasp);
if (!clasp)
clasp = &JSObject::class_; /* default class is Object */
JS_ASSERT(clasp != &JSFunction::class_);
JS_ASSERT(!(clasp->flags & JSCLASS_IS_GLOBAL));
JSObject *obj = NewObjectWithGivenProto(cx, clasp, proto, parent);
if (obj)
MarkTypeObjectUnknownProperties(cx, obj->type());
return obj;
}
JS_PUBLIC_API(JSObject *)
JS_NewObjectForConstructor(JSContext *cx, 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_IsExtensible(JSContext *cx, HandleObject obj, bool *extensible)
{
return JSObject::isExtensible(cx, obj, extensible);
}
JS_PUBLIC_API(bool)
JS_IsNative(JSObject *obj)
{
return obj->isNative();
}
JS_PUBLIC_API(JSRuntime *)
JS_GetObjectRuntime(JSObject *obj)
{
return obj->compartment()->runtimeFromMainThread();
}
JS_PUBLIC_API(bool)
JS_FreezeObject(JSContext *cx, HandleObject obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
return JSObject::freeze(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 (!JSObject::isExtensible(cx, obj, &extensible))
return false;
if (!extensible)
return true;
if (!JSObject::freeze(cx, obj))
return false;
/* Walk slots in obj and if any value is a non-null object, seal it. */
for (uint32_t i = 0, n = obj->slotSpan(); i < n; ++i) {
const Value &v = obj->getSlot(i);
if (v.isPrimitive())
continue;
RootedObject obj(cx, &v.toObject());
if (!JS_DeepFreezeObject(cx, obj))
return false;
}
return true;
}
static bool
LookupPropertyById(JSContext *cx, HandleObject obj, HandleId id, unsigned flags,
MutableHandleObject objp, MutableHandleShape propp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
JSAutoResolveFlags rf(cx, flags);
return JSObject::lookupGeneric(cx, obj, id, objp, propp);
}
#define AUTO_NAMELEN(s,n) (((n) == (size_t)-1) ? js_strlen(s) : (n))
static bool
LookupResult(JSContext *cx, HandleObject obj, HandleObject obj2, HandleId id,
HandleShape shape, MutableHandleValue vp)
{
if (!shape) {
/* XXX bad API: no way to tell "not defined" from "void value" */
vp.setUndefined();
return true;
}
if (!obj2->isNative()) {
if (obj2->is<ProxyObject>()) {
Rooted<PropertyDescriptor> desc(cx);
if (!Proxy::getPropertyDescriptor(cx, obj2, id, &desc, 0))
return false;
if (!desc.isShared()) {
vp.set(desc.value());
return true;
}
}
} else if (IsImplicitDenseOrTypedArrayElement(shape)) {
vp.set(obj2->getDenseOrTypedArrayElement(JSID_TO_INT(id)));
return true;
} else {
/* Peek at the native property's slot value, without doing a Get. */
if (shape->hasSlot()) {
vp.set(obj2->nativeGetSlot(shape->slot()));
return true;
}
}
/* XXX bad API: no way to return "defined but value unknown" */
vp.setBoolean(true);
return true;
}
JS_PUBLIC_API(bool)
JS_LookupPropertyById(JSContext *cx, HandleObject obj, HandleId id, MutableHandleValue vp)
{
RootedObject obj2(cx);
RootedShape prop(cx);
return LookupPropertyById(cx, obj, id, 0, &obj2, &prop) &&
LookupResult(cx, obj, obj2, id, prop, vp);
}
JS_PUBLIC_API(bool)
JS_LookupElement(JSContext *cx, HandleObject obj, uint32_t index, MutableHandleValue vp)
{
CHECK_REQUEST(cx);
RootedId id(cx);
if (!IndexToId(cx, index, &id))
return false;
return JS_LookupPropertyById(cx, obj, id, vp);
}
JS_PUBLIC_API(bool)
JS_LookupProperty(JSContext *cx, HandleObject objArg, const char *name, MutableHandleValue vp)
{
RootedObject obj(cx, objArg);
JSAtom *atom = Atomize(cx, name, strlen(name));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return JS_LookupPropertyById(cx, obj, id, vp);
}
JS_PUBLIC_API(bool)
JS_LookupUCProperty(JSContext *cx, HandleObject objArg, const jschar *name, size_t namelen,
MutableHandleValue vp)
{
RootedObject obj(cx, objArg);
JSAtom *atom = AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return JS_LookupPropertyById(cx, obj, id, vp);
}
JS_PUBLIC_API(bool)
JS_LookupPropertyWithFlagsById(JSContext *cx, HandleObject obj, HandleId id, unsigned flags,
MutableHandleObject objp, MutableHandleValue vp)
{
RootedShape prop(cx);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
if (!(obj->isNative()
? LookupPropertyWithFlags(cx, obj, id, flags, objp, &prop)
: JSObject::lookupGeneric(cx, obj, id, objp, &prop)))
return false;
return LookupResult(cx, obj, objp, id, prop, vp);
}
JS_PUBLIC_API(bool)
JS_LookupPropertyWithFlags(JSContext *cx, HandleObject obj, const char *name, unsigned flags,
MutableHandleValue vp)
{
RootedObject obj2(cx);
JSAtom *atom = Atomize(cx, name, strlen(name));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return JS_LookupPropertyWithFlagsById(cx, obj, id, flags, &obj2, vp);
}
JS_PUBLIC_API(bool)
JS_HasPropertyById(JSContext *cx, HandleObject obj, HandleId id, bool *foundp)
{
RootedObject obj2(cx);
RootedShape prop(cx);
bool ok = LookupPropertyById(cx, obj, id, 0, &obj2, &prop);
*foundp = (prop != nullptr);
return ok;
}
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_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 jschar *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_AlreadyHasOwnPropertyById(JSContext *cx, HandleObject obj, HandleId id, bool *foundp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
if (!obj->isNative()) {
RootedObject obj2(cx);
RootedShape prop(cx);
if (!LookupPropertyById(cx, obj, id, 0, &obj2, &prop))
return false;
*foundp = (obj == obj2);
return true;
}
// Check for an existing native property on the objct. Be careful not to
// call any lookup or resolve hooks.
if (JSID_IS_INT(id)) {
uint32_t index = JSID_TO_INT(id);
if (obj->containsDenseElement(index)) {
*foundp = true;
return true;
}
if (obj->is<TypedArrayObject>() && index < obj->as<TypedArrayObject>().length()) {
*foundp = true;
return true;
}
}
*foundp = obj->nativeContains(cx, id);
return true;
}
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_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 jschar *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);
}
/* Wrapper functions to create wrappers with no corresponding JSJitInfo from API
* function arguments.
*/
static JSPropertyOpWrapper
GetterWrapper(JSPropertyOp getter)
{
JSPropertyOpWrapper ret;
ret.op = getter;
ret.info = nullptr;
return ret;
}
static JSStrictPropertyOpWrapper
SetterWrapper(JSStrictPropertyOp setter)
{
JSStrictPropertyOpWrapper ret;
ret.op = setter;
ret.info = nullptr;
return ret;
}
static bool
DefinePropertyById(JSContext *cx, HandleObject obj, HandleId id, HandleValue value,
const JSPropertyOpWrapper &get, const JSStrictPropertyOpWrapper &set,
unsigned attrs, unsigned flags)
{
PropertyOp getter = get.op;
StrictPropertyOp setter = set.op;
/*
* JSPROP_READONLY has no meaning when accessors are involved. Ideally we'd
* throw if this happens, but we've accepted it for long enough that it's
* not worth trying to make callers change their ways. Just flip it off on
* its way through the API layer so that we can enforce this internally.
*/
if (attrs & (JSPROP_GETTER | JSPROP_SETTER))
attrs &= ~JSPROP_READONLY;
/*
* When we use DefineProperty, we need full scriptable Function objects rather
* than JSNatives. However, we might be pulling this property descriptor off
* of something with JSNative property descriptors. If we are, wrap them in
* JS Function objects.
*/
if (attrs & JSPROP_NATIVE_ACCESSORS) {
JS_ASSERT(!(attrs & (JSPROP_GETTER | JSPROP_SETTER)));
JSFunction::Flags zeroFlags = JSAPIToJSFunctionFlags(0);
// We can't just use JS_NewFunctionById here because it
// assumes a string id.
RootedAtom atom(cx, JSID_IS_ATOM(id) ? JSID_TO_ATOM(id) : nullptr);
attrs &= ~JSPROP_NATIVE_ACCESSORS;
if (getter) {
RootedObject global(cx, (JSObject*) &obj->global());
JSFunction *getobj = NewFunction(cx, NullPtr(), (Native) getter, 0,
zeroFlags, global, atom);
if (!getobj)
return false;
if (get.info)
getobj->setJitInfo(get.info);
getter = JS_DATA_TO_FUNC_PTR(PropertyOp, getobj);
attrs |= JSPROP_GETTER;
}
if (setter) {
// Root just the getter, since the setter is not yet a JSObject.
AutoRooterGetterSetter getRoot(cx, JSPROP_GETTER, &getter, nullptr);
RootedObject global(cx, (JSObject*) &obj->global());
JSFunction *setobj = NewFunction(cx, NullPtr(), (Native) setter, 1,
zeroFlags, global, atom);
if (!setobj)
return false;
if (set.info)
setobj->setJitInfo(set.info);
setter = JS_DATA_TO_FUNC_PTR(StrictPropertyOp, setobj);
attrs |= JSPROP_SETTER;
}
}
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id, value,
(attrs & JSPROP_GETTER)
? JS_FUNC_TO_DATA_PTR(JSObject *, getter)
: nullptr,
(attrs & JSPROP_SETTER)
? JS_FUNC_TO_DATA_PTR(JSObject *, setter)
: nullptr);
JSAutoResolveFlags rf(cx, 0);
if (flags != 0 && obj->isNative())
return DefineNativeProperty(cx, obj, id, value, getter, setter, attrs, flags);
return JSObject::defineGeneric(cx, obj, id, value, getter, setter, attrs);
}
JS_PUBLIC_API(bool)
JS_DefinePropertyById(JSContext *cx, JSObject *objArg, jsid idArg, jsval valueArg,
JSPropertyOp getter, JSStrictPropertyOp setter, unsigned attrs)
{
RootedObject obj(cx, objArg);
RootedId id(cx, idArg);
RootedValue value(cx, valueArg);
return DefinePropertyById(cx, obj, id, value, GetterWrapper(getter), SetterWrapper(setter),
attrs, 0);
}
JS_PUBLIC_API(bool)
JS_DefineElement(JSContext *cx, JSObject *objArg, uint32_t index, jsval valueArg,
JSPropertyOp getter, JSStrictPropertyOp setter, unsigned attrs)
{
RootedObject obj(cx, objArg);
RootedValue value(cx, valueArg);
AutoRooterGetterSetter gsRoot(cx, attrs, &getter, &setter);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedId id(cx);
if (!IndexToId(cx, index, &id))
return false;
return DefinePropertyById(cx, obj, id, value, GetterWrapper(getter), SetterWrapper(setter),
attrs, 0);
}
static bool
DefineProperty(JSContext *cx, HandleObject obj, const char *name, HandleValue value,
const JSPropertyOpWrapper &getter, const JSStrictPropertyOpWrapper &setter,
unsigned attrs, unsigned flags)
{
AutoRooterGetterSetter gsRoot(cx, attrs, const_cast<JSPropertyOp *>(&getter.op),
const_cast<JSStrictPropertyOp *>(&setter.op));
RootedId id(cx);
if (attrs & JSPROP_INDEX) {
id.set(INT_TO_JSID(intptr_t(name)));
attrs &= ~JSPROP_INDEX;
} else {
JSAtom *atom = Atomize(cx, name, strlen(name));
if (!atom)
return false;
id = AtomToId(atom);
}
return DefinePropertyById(cx, obj, id, value, getter, setter, attrs, flags);
}
static bool
DefineSelfHostedProperty(JSContext *cx,
HandleObject obj,
const char *name,
const char *getterName,
const char *setterName,
unsigned attrs,
unsigned flags)
{
RootedAtom nameAtom(cx, Atomize(cx, name, strlen(name)));
if (!nameAtom)
return false;
RootedAtom getterNameAtom(cx, Atomize(cx, getterName, strlen(getterName)));
if (!getterNameAtom)
return false;
RootedValue getterValue(cx);
if (!cx->global()->getSelfHostedFunction(cx, getterNameAtom, nameAtom,
0, &getterValue))
{
return false;
}
JS_ASSERT(getterValue.isObject() && getterValue.toObject().is<JSFunction>());
RootedFunction getterFunc(cx, &getterValue.toObject().as<JSFunction>());
JSPropertyOp getterOp = JS_DATA_TO_FUNC_PTR(PropertyOp, getterFunc.get());
RootedFunction setterFunc(cx);
if (setterName) {
RootedAtom setterNameAtom(cx, Atomize(cx, setterName, strlen(setterName)));
if (!setterNameAtom)
return false;
RootedValue setterValue(cx);
if (!cx->global()->getSelfHostedFunction(cx, setterNameAtom, nameAtom,
0, &setterValue))
{
return false;
}
JS_ASSERT(setterValue.isObject() && setterValue.toObject().is<JSFunction>());
setterFunc = &getterValue.toObject().as<JSFunction>();
}
JSStrictPropertyOp setterOp = JS_DATA_TO_FUNC_PTR(StrictPropertyOp, setterFunc.get());
return DefineProperty(cx, obj, name, JS::UndefinedHandleValue,
GetterWrapper(getterOp), SetterWrapper(setterOp),
attrs, flags);
}
JS_PUBLIC_API(bool)
JS_DefineProperty(JSContext *cx, JSObject *objArg, const char *name, jsval valueArg,
PropertyOp getter, JSStrictPropertyOp setter, unsigned attrs)
{
RootedObject obj(cx, objArg);
RootedValue value(cx, valueArg);
return DefineProperty(cx, obj, name, value, GetterWrapper(getter), SetterWrapper(setter),
attrs, 0);
}
static bool
DefineUCProperty(JSContext *cx, HandleObject obj, const jschar *name, size_t namelen,
const Value &value_, PropertyOp getter, StrictPropertyOp 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, GetterWrapper(getter), SetterWrapper(setter),
attrs, flags);
}
JS_PUBLIC_API(bool)
JS_DefineUCProperty(JSContext *cx, JSObject *objArg, const jschar *name, size_t namelen,
jsval valueArg, JSPropertyOp getter, JSStrictPropertyOp setter, unsigned attrs)
{
RootedObject obj(cx, objArg);
RootedValue value(cx, valueArg);
return DefineUCProperty(cx, obj, name, namelen, value, getter, setter, attrs, 0);
}
JS_PUBLIC_API(bool)
JS_DefineOwnProperty(JSContext *cx, HandleObject obj, HandleId id, HandleValue descriptor, bool *bp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id, descriptor);
return DefineOwnProperty(cx, obj, id, descriptor, bp);
}
JS_PUBLIC_API(JSObject *)
JS_DefineObject(JSContext *cx, JSObject *objArg, const char *name, const JSClass *jsclasp,
JSObject *protoArg, unsigned attrs)
{
RootedObject obj(cx, objArg);
RootedObject proto(cx, protoArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, proto);
const Class *clasp = Valueify(jsclasp);
if (!clasp)
clasp = &JSObject::class_; /* default class is Object */
RootedObject nobj(cx, NewObjectWithClassProto(cx, clasp, proto, obj));
if (!nobj)
return nullptr;
RootedValue nobjValue(cx, ObjectValue(*nobj));
if (!DefineProperty(cx, obj, name, nobjValue, GetterWrapper(nullptr), SetterWrapper(nullptr),
attrs, 0)) {
return nullptr;
}
return nobj;
}
JS_PUBLIC_API(bool)
JS_DefineConstDoubles(JSContext *cx, HandleObject obj, const JSConstDoubleSpec *cds)
{
bool ok;
unsigned attrs;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSPropertyOpWrapper noget = GetterWrapper(nullptr);
JSStrictPropertyOpWrapper noset = SetterWrapper(nullptr);
for (ok = true; cds->name; cds++) {
RootedValue value(cx, DoubleValue(cds->dval));
attrs = cds->flags;
if (!attrs)
attrs = JSPROP_READONLY | JSPROP_PERMANENT;
ok = DefineProperty(cx, obj, cds->name, value, noget, noset, attrs, 0);
if (!ok)
break;
}
return ok;
}
JS_PUBLIC_API(bool)
JS_DefineProperties(JSContext *cx, HandleObject obj, const JSPropertySpec *ps)
{
bool ok;
for (ok = true; ps->name; ps++) {
if (ps->flags & JSPROP_NATIVE_ACCESSORS) {
// If you declare native accessors, then you should have a native
// getter.
JS_ASSERT(ps->getter.propertyOp.op);
// If you do not have a self-hosted getter, you should not have a
// self-hosted setter. This is the closest approximation to that
// assertion we can have with our setup.
JS_ASSERT_IF(ps->setter.propertyOp.info, ps->setter.propertyOp.op);
ok = DefineProperty(cx, obj, ps->name, JS::UndefinedHandleValue,
ps->getter.propertyOp, ps->setter.propertyOp, ps->flags, 0);
} else {
// If you have self-hosted getter/setter, you can't have a
// native one.
JS_ASSERT(!ps->getter.propertyOp.op && !ps->setter.propertyOp.op);
JS_ASSERT(ps->flags & JSPROP_GETTER);
/*
* During creation of the self-hosting global, we ignore all
* self-hosted properties, as that means we're currently setting up
* the global object that the self-hosted code is then compiled
* in. That means that Self-hosted properties can't be used in the
* self-hosting global itself, right now.
*/
if (cx->runtime()->isSelfHostingGlobal(cx->global()))
continue;
ok = DefineSelfHostedProperty(cx, obj, ps->name,
ps->getter.selfHosted.funname,
ps->setter.selfHosted.funname,
ps->flags, 0);
}
if (!ok)
break;
}
return ok;
}
static bool
GetPropertyDescriptorById(JSContext *cx, HandleObject obj, HandleId id, unsigned flags,
bool own, MutableHandle<PropertyDescriptor> desc)
{
RootedObject obj2(cx);
RootedShape shape(cx);
if (!LookupPropertyById(cx, obj, id, flags, &obj2, &shape))
return false;
desc.clear();
if (!shape || (own && obj != obj2))
return true;
desc.object().set(obj2);
if (obj2->isNative()) {
if (IsImplicitDenseOrTypedArrayElement(shape)) {
desc.setEnumerable();
desc.value().set(obj2->getDenseOrTypedArrayElement(JSID_TO_INT(id)));
} else {
desc.setAttributes(shape->attributes());
desc.setGetter(shape->getter());
desc.setSetter(shape->setter());
JS_ASSERT(desc.value().isUndefined());
if (shape->hasSlot())
desc.value().set(obj2->nativeGetSlot(shape->slot()));
}
} else {
if (obj2->is<ProxyObject>()) {
JSAutoResolveFlags rf(cx, flags);
return own
? Proxy::getOwnPropertyDescriptor(cx, obj2, id, desc, 0)
: Proxy::getPropertyDescriptor(cx, obj2, id, desc, 0);
}
if (!JSObject::getGenericAttributes(cx, obj2, id, &desc.attributesRef()))
return false;
JS_ASSERT(desc.getter() == nullptr);
JS_ASSERT(desc.setter() == nullptr);
JS_ASSERT(desc.value().isUndefined());
}
return true;
}
JS_PUBLIC_API(bool)
JS_GetOwnPropertyDescriptorById(JSContext *cx, HandleObject obj, HandleId id, unsigned flags,
MutableHandle<JSPropertyDescriptor> desc)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return GetPropertyDescriptorById(cx, obj, id, flags, true, desc);
}
JS_PUBLIC_API(bool)
JS_GetOwnPropertyDescriptor(JSContext *cx, HandleObject obj, const char *name, unsigned flags,
MutableHandle<JSPropertyDescriptor> desc)
{
JSAtom *atom = Atomize(cx, name, strlen(name));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return JS_GetOwnPropertyDescriptorById(cx, obj, id, flags, desc);
}
JS_PUBLIC_API(bool)
JS_GetPropertyDescriptorById(JSContext *cx, HandleObject obj, HandleId id, unsigned flags,
MutableHandle<JSPropertyDescriptor> desc)
{
return GetPropertyDescriptorById(cx, obj, id, flags, false, desc);
}
JS_PUBLIC_API(bool)
JS_GetPropertyDescriptor(JSContext *cx, HandleObject obj, const char *name, unsigned flags,
MutableHandle<JSPropertyDescriptor> desc)
{
JSAtom *atom = Atomize(cx, name, strlen(name));
if (!atom)
return false;
RootedId id(cx, AtomToId(atom));
return atom && JS_GetPropertyDescriptorById(cx, obj, id, flags, desc);
}
JS_PUBLIC_API(bool)
JS_GetPropertyById(JSContext *cx, HandleObject obj, HandleId id, MutableHandleValue vp)
{
return JS_ForwardGetPropertyTo(cx, obj, id, obj, vp);
}
JS_PUBLIC_API(bool)
JS_ForwardGetPropertyTo(JSContext *cx, JS::HandleObject obj, JS::HandleId id, JS::HandleObject onBehalfOf,
JS::MutableHandleValue vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
assertSameCompartment(cx, onBehalfOf);
JSAutoResolveFlags rf(cx, 0);
return JSObject::getGeneric(cx, obj, onBehalfOf, 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_ForwardGetElementTo(JSContext *cx, HandleObject obj, uint32_t index, HandleObject onBehalfOf,
MutableHandleValue vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAutoResolveFlags rf(cx, 0);
return JSObject::getElement(cx, obj, onBehalfOf, index, 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 jschar *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_SetPropertyById(JSContext *cx, HandleObject obj, HandleId id, HandleValue v)
{
RootedValue value(cx, v);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
JSAutoResolveFlags rf(cx, JSRESOLVE_ASSIGNING);
return JSObject::setGeneric(cx, obj, obj, id, &value, false);
}
static bool
SetElement(JSContext *cx, HandleObject obj, uint32_t index, MutableHandleValue vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, vp);
JSAutoResolveFlags rf(cx, JSRESOLVE_ASSIGNING);
return JSObject::setElement(cx, obj, obj, index, vp, false);
}
JS_PUBLIC_API(bool)
JS_SetElement(JSContext *cx, HandleObject obj, uint32_t index, HandleValue v)
{
RootedValue value(cx, v);
return SetElement(cx, obj, index, &value);
}
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_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 jschar *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);
}
JS_PUBLIC_API(bool)
JS_DeletePropertyById2(JSContext *cx, HandleObject obj, HandleId id, bool *result)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj, id);
JSAutoResolveFlags rf(cx, 0);
return JSObject::deleteByValue(cx, obj, IdToValue(id), result);
}
JS_PUBLIC_API(bool)
JS_DeleteElement2(JSContext *cx, HandleObject obj, uint32_t index, bool *result)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAutoResolveFlags rf(cx, 0);
return JSObject::deleteElement(cx, obj, index, result);
}
JS_PUBLIC_API(bool)
JS_DeleteProperty2(JSContext *cx, HandleObject obj, const char *name, bool *result)
{
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAutoResolveFlags rf(cx, 0);
JSAtom *atom = Atomize(cx, name, strlen(name));
if (!atom)
return false;
return JSObject::deleteByValue(cx, obj, StringValue(atom), result);
}
JS_PUBLIC_API(bool)
JS_DeleteUCProperty2(JSContext *cx, HandleObject obj, const jschar *name, size_t namelen,
bool *result)
{
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JSAutoResolveFlags rf(cx, 0);
JSAtom *atom = AtomizeChars(cx, name, AUTO_NAMELEN(name, namelen));
if (!atom)
return false;
return JSObject::deleteByValue(cx, obj, StringValue(atom), result);
}
JS_PUBLIC_API(bool)
JS_DeletePropertyById(JSContext *cx, HandleObject obj, HandleId id)
{
bool junk;
return JS_DeletePropertyById2(cx, obj, id, &junk);
}
JS_PUBLIC_API(bool)
JS_DeleteElement(JSContext *cx, HandleObject obj, uint32_t index)
{
bool junk;
return JS_DeleteElement2(cx, obj, index, &junk);
}
JS_PUBLIC_API(bool)
JS_DeleteProperty(JSContext *cx, HandleObject obj, const char *name)
{
bool junk;
return JS_DeleteProperty2(cx, obj, name, &junk);
}
static Shape *
LastConfigurableShape(JSObject *obj)
{
for (Shape::Range<NoGC> r(obj->lastProperty()); !r.empty(); r.popFront()) {
Shape *shape = &r.front();
if (shape->configurable())
return shape;
}
return nullptr;
}
JS_PUBLIC_API(void)
JS_ClearNonGlobalObject(JSContext *cx, HandleObject obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
JS_ASSERT(!obj->is<GlobalObject>());
if (!obj->isNative())
return;
/* Remove all configurable properties from obj. */
RootedShape shape(cx);
while ((shape = LastConfigurableShape(obj))) {
if (!obj->removeProperty(cx, shape->propid()))
return;
}
/* Set all remaining writable plain data properties to undefined. */
for (Shape::Range<NoGC> r(obj->lastProperty()); !r.empty(); r.popFront()) {
Shape *shape = &r.front();
if (shape->isDataDescriptor() &&
shape->writable() &&
shape->hasDefaultSetter() &&
shape->hasSlot())
{
obj->nativeSetSlot(shape->slot(), UndefinedValue());
}
}
}
JS_PUBLIC_API(void)
JS_SetAllNonReservedSlotsToUndefined(JSContext *cx, JSObject *objArg)
{
RootedObject obj(cx, objArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
if (!obj->isNative())
return;
const Class *clasp = obj->getClass();
unsigned numReserved = JSCLASS_RESERVED_SLOTS(clasp);
unsigned numSlots = obj->slotSpan();
for (unsigned i = numReserved; i < numSlots; i++)
obj->setSlot(i, UndefinedValue());
}
JS_PUBLIC_API(JSIdArray *)
JS_Enumerate(JSContext *cx, HandleObject obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
AutoIdVector props(cx);
JSIdArray *ida;
if (!GetPropertyNames(cx, obj, JSITER_OWNONLY, &props) || !VectorToIdArray(cx, props, &ida))
return nullptr;
return ida;
}
/*
* XXX reverse iterator for properties, unreverse and meld with jsinterp.c's
* prop_iterator_class somehow...
* + preserve the obj->enumerate API while optimizing the native object case
* + native case here uses a JSShape *, but that iterates in reverse!
* + so we make non-native match, by reverse-iterating after JS_Enumerating
*/
static const uint32_t JSSLOT_ITER_INDEX = 0;
static void
prop_iter_finalize(FreeOp *fop, JSObject *obj)
{
void *pdata = obj->getPrivate();
if (!pdata)
return;
if (obj->getSlot(JSSLOT_ITER_INDEX).toInt32() >= 0) {
/* Non-native case: destroy the ida enumerated when obj was created. */
JSIdArray *ida = (JSIdArray *) pdata;
fop->free_(ida);
}
}
static void
prop_iter_trace(JSTracer *trc, JSObject *obj)
{
void *pdata = obj->getPrivate();
if (!pdata)
return;
if (obj->getSlot(JSSLOT_ITER_INDEX).toInt32() < 0) {
/*
* Native case: just mark the next property to visit. We don't need a
* barrier here because the pointer is updated via setPrivate, which
* always takes a barrier.
*/
Shape *tmp = static_cast<Shape *>(pdata);
MarkShapeUnbarriered(trc, &tmp, "prop iter shape");
obj->setPrivateUnbarriered(tmp);
} else {
/* Non-native case: mark each id in the JSIdArray private. */
JSIdArray *ida = (JSIdArray *) pdata;
MarkIdRange(trc, ida->length, ida->vector, "prop iter");
}
}
static const Class prop_iter_class = {
"PropertyIterator",
JSCLASS_HAS_PRIVATE | JSCLASS_IMPLEMENTS_BARRIERS | JSCLASS_HAS_RESERVED_SLOTS(1),
JS_PropertyStub, /* addProperty */
JS_DeletePropertyStub, /* delProperty */
JS_PropertyStub, /* getProperty */
JS_StrictPropertyStub, /* setProperty */
JS_EnumerateStub,
JS_ResolveStub,
JS_ConvertStub,
prop_iter_finalize,
nullptr, /* call */
nullptr, /* hasInstance */
nullptr, /* construct */
prop_iter_trace
};
JS_PUBLIC_API(JSObject *)
JS_NewPropertyIterator(JSContext *cx, HandleObject obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
RootedObject iterobj(cx, NewObjectWithClassProto(cx, &prop_iter_class, nullptr, obj));
if (!iterobj)
return nullptr;
int index;
if (obj->isNative()) {
/* Native case: start with the last property in obj. */
iterobj->setPrivateGCThing(obj->lastProperty());
index = -1;
} else {
/* Non-native case: enumerate a JSIdArray and keep it via private. */
JSIdArray *ida = JS_Enumerate(cx, obj);
if (!ida)
return nullptr;
iterobj->setPrivate((void *)ida);
index = ida->length;
}
/* iterobj cannot escape to other threads here. */
iterobj->setSlot(JSSLOT_ITER_INDEX, Int32Value(index));
return iterobj;
}
JS_PUBLIC_API(bool)
JS_NextProperty(JSContext *cx, HandleObject iterobj, jsid *idp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, iterobj);
int32_t i = iterobj->getSlot(JSSLOT_ITER_INDEX).toInt32();
if (i < 0) {
/* Native case: private data is a property tree node pointer. */
JS_ASSERT(iterobj->getParent()->isNative());
Shape *shape = static_cast<Shape *>(iterobj->getPrivate());
while (shape->previous() && !shape->enumerable())
shape = shape->previous();
if (!shape->previous()) {
JS_ASSERT(shape->isEmptyShape());
*idp = JSID_VOID;
} else {
iterobj->setPrivateGCThing(const_cast<Shape *>(shape->previous().get()));
*idp = shape->propid();
}
} else {
/* Non-native case: use the ida enumerated when iterobj was created. */
JSIdArray *ida = (JSIdArray *) iterobj->getPrivate();
JS_ASSERT(i <= ida->length);
STATIC_ASSUME(i <= ida->length);
if (i == 0) {
*idp = JSID_VOID;
} else {
*idp = ida->vector[--i];
iterobj->setSlot(JSSLOT_ITER_INDEX, Int32Value(i));
}
}
return true;
}
JS_PUBLIC_API(jsval)
JS_GetReservedSlot(JSObject *obj, uint32_t index)
{
return obj->getReservedSlot(index);
}
JS_PUBLIC_API(void)
JS_SetReservedSlot(JSObject *obj, uint32_t index, Value value)
{
obj->setReservedSlot(index, value);
}
JS_PUBLIC_API(JSObject *)
JS_NewArrayObject(JSContext *cx, const JS::HandleValueArray& contents)
{
JS_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)
{
JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return NewDenseAllocatedArray(cx, length);
}
JS_PUBLIC_API(bool)
JS_IsArrayObject(JSContext *cx, JS::HandleObject obj)
{
assertSameCompartment(cx, obj);
return ObjectClassIs(obj, ESClass_Array, cx);
}
JS_PUBLIC_API(bool)
JS_IsArrayObject(JSContext *cx, JS::HandleValue value)
{
if (!value.isObject())
return false;
RootedObject obj(cx, &value.toObject());
return JS_IsArrayObject(cx, obj);
}
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)
{
JS_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, const JSPrincipals *prin)
{
rt->setTrustedPrincipals(prin);
}
extern JS_PUBLIC_API(void)
JS_InitDestroyPrincipalsCallback(JSRuntime *rt, JSDestroyPrincipalsOp destroyPrincipals)
{
JS_ASSERT(destroyPrincipals);
JS_ASSERT(!rt->destroyPrincipals);
rt->destroyPrincipals = destroyPrincipals;
}
JS_PUBLIC_API(JSFunction *)
JS_NewFunction(JSContext *cx, JSNative native, unsigned nargs, unsigned flags,
HandleObject parent, const char *name)
{
JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
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);
}
JS_PUBLIC_API(JSFunction *)
JS_NewFunctionById(JSContext *cx, JSNative native, unsigned nargs, unsigned flags,
HandleObject parent, HandleId id)
{
JS_ASSERT(JSID_IS_STRING(id));
JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
JS_ASSERT(native);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, parent);
RootedAtom name(cx, JSID_TO_ATOM(id));
JSFunction::Flags funFlags = JSAPIToJSFunctionFlags(flags);
return NewFunction(cx, NullPtr(), native, nargs, funFlags, parent, name);
}
JS_PUBLIC_API(JSFunction *)
JS::GetSelfHostedFunction(JSContext *cx, const char *selfHostedName, HandleId id, unsigned nargs)
{
JS_ASSERT(JSID_IS_STRING(id));
JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedAtom name(cx, JSID_TO_ATOM(id));
RootedAtom shName(cx, Atomize(cx, selfHostedName, strlen(selfHostedName)));
if (!shName)
return nullptr;
RootedValue funVal(cx);
if (!cx->global()->getSelfHostedFunction(cx, shName, name, nargs, &funVal))
return nullptr;
return &funVal.toObject().as<JSFunction>();
}
JS_PUBLIC_API(JSObject *)
JS_CloneFunctionObject(JSContext *cx, HandleObject funobj, HandleObject parentArg)
{
RootedObject parent(cx, parentArg);
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, parent);
// Note that funobj can be in a different compartment.
if (!parent)
parent = cx->global();
if (!funobj->is<JSFunction>()) {
AutoCompartment ac(cx, funobj);
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 a function was compiled to be lexically nested inside some other
* script, we cannot clone it without breaking the compiler's assumptions.
*/
if (fun->isInterpreted() && (fun->nonLazyScript()->enclosingStaticScope() ||
(fun->nonLazyScript()->compileAndGo() && !parent->is<GlobalObject>())))
{
JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_BAD_CLONE_FUNOBJ_SCOPE);
return nullptr;
}
if (fun->isBoundFunction()) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_CANT_CLONE_OBJECT);
return nullptr;
}
if (fun->isNative() && IsAsmJSModuleNative(fun->native())) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_CANT_CLONE_OBJECT);
return nullptr;
}
return CloneFunctionObject(cx, fun, parent, fun->getAllocKind());
}
JS_PUBLIC_API(JSObject *)
JS_GetFunctionObject(JSFunction *fun)
{
return fun;
}
JS_PUBLIC_API(JSString *)
JS_GetFunctionId(JSFunction *fun)
{
return fun->atom();
}
JS_PUBLIC_API(JSString *)
JS_GetFunctionDisplayId(JSFunction *fun)
{
return fun->displayAtom();
}
JS_PUBLIC_API(uint16_t)
JS_GetFunctionArity(JSFunction *fun)
{
return fun->nargs();
}
JS_PUBLIC_API(bool)
JS_ObjectIsFunction(JSContext *cx, JSObject *obj)
{
return obj->is<JSFunction>();
}
JS_PUBLIC_API(bool)
JS_ObjectIsCallable(JSContext *cx, JSObject *obj)
{
return obj->isCallable();
}
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->isNativeConstructor() || fun->isInterpretedConstructor();
}
JS_PUBLIC_API(JSObject*)
JS_BindCallable(JSContext *cx, HandleObject target, HandleObject newThis)
{
RootedValue thisArg(cx, ObjectValue(*newThis));
return js_fun_bind(cx, target, thisArg, nullptr, 0);
}
static bool
js_generic_native_method_dispatcher(JSContext *cx, unsigned argc, Value *vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
const JSFunctionSpec *fs = (JSFunctionSpec *)
args.callee().as<JSFunction>().getExtendedSlot(0).toPrivate();
JS_ASSERT((fs->flags & JSFUN_GENERIC_NATIVE) != 0);
if (argc < 1) {
js_ReportMissingArg(cx, args.calleev(), 0);
return false;
}
/*
* Copy all actual (argc) arguments down over our |this| parameter, vp[1],
* which is almost always the class constructor object, e.g. Array. Then
* call the corresponding prototype native method with our first argument
* passed as |this|.
*/
memmove(vp + 1, vp + 2, argc * sizeof(jsval));
/* Clear the last parameter in case too few arguments were passed. */
vp[2 + --argc].setUndefined();
return fs->call.op(cx, argc, vp);
}
JS_PUBLIC_API(bool)
JS_DefineFunctions(JSContext *cx, HandleObject obj, const JSFunctionSpec *fs)
{
JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
RootedObject ctor(cx);
for (; fs->name; fs++) {
RootedAtom atom(cx);
// If the name starts with "@@", it must be a well-known symbol.
if (fs->name[0] != '@' || fs->name[1] != '@')
atom = Atomize(cx, fs->name, strlen(fs->name));
else if (strcmp(fs->name, "@@iterator") == 0)
// FIXME: This atom should be a symbol: bug 918828.
atom = cx->names().std_iterator;
else
JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_BAD_SYMBOL, fs->name);
if (!atom)
return false;
Rooted<jsid> id(cx, AtomToId(atom));
/*
* Define a generic arity N+1 static method for the arity N prototype
* method if flags contains JSFUN_GENERIC_NATIVE.
*/
unsigned flags = fs->flags;
if (flags & JSFUN_GENERIC_NATIVE) {
if (!ctor) {
ctor = JS_GetConstructor(cx, obj);
if (!ctor)
return false;
}
flags &= ~JSFUN_GENERIC_NATIVE;
JSFunction *fun = DefineFunction(cx, ctor, id,
js_generic_native_method_dispatcher,
fs->nargs + 1, flags,
JSFunction::ExtendedFinalizeKind);
if (!fun)
return false;
/*
* As jsapi.h notes, fs must point to storage that lives as long
* as fun->object lives.
*/
fun->setExtendedSlot(0, PrivateValue(const_cast<JSFunctionSpec*>(fs)));
}
/*
* Delay cloning self-hosted functions until they are called. This is
* achieved by passing DefineFunction a nullptr JSNative which
* produces an interpreted JSFunction where !hasScript. Interpreted
* call paths then call InitializeLazyFunctionScript if !hasScript.
*/
if (fs->selfHostedName) {
JS_ASSERT(!fs->call.op);
JS_ASSERT(!fs->call.info);
/*
* During creation of the self-hosting global, we ignore all
* self-hosted functions, as that means we're currently setting up
* the global object that the self-hosted code is then compiled
* in. Self-hosted functions can access each other via their names,
* but not via the builtin classes they get installed into.
*/
if (cx->runtime()->isSelfHostingGlobal(cx->global()))
continue;
RootedAtom shName(cx, Atomize(cx, fs->selfHostedName, strlen(fs->selfHostedName)));
if (!shName)
return false;
RootedValue funVal(cx);
if (!cx->global()->getSelfHostedFunction(cx, shName, atom, fs->nargs, &funVal))
return false;
if (!JSObject::defineGeneric(cx, obj, id, funVal, nullptr, nullptr, flags))
return false;
} else {
JSFunction *fun = DefineFunction(cx, obj, id, fs->call.op, fs->nargs, flags);
if (!fun)
return false;
if (fs->call.info)
fun->setJitInfo(fs->call.info);
}
}
return true;
}
JS_PUBLIC_API(JSFunction *)
JS_DefineFunction(JSContext *cx, HandleObject obj, const char *name, JSNative call,
unsigned nargs, unsigned attrs)
{
JS_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 jschar *name, size_t namelen, JSNative call,
unsigned nargs, unsigned attrs)
{
JS_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)
{
JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
return DefineFunction(cx, obj, id, call, nargs, attrs);
}
struct AutoLastFrameCheck
{
AutoLastFrameCheck(JSContext *cx
MOZ_GUARD_OBJECT_NOTIFIER_PARAM)
: cx(cx)
{
JS_ASSERT(cx);
MOZ_GUARD_OBJECT_NOTIFIER_INIT;
}
~AutoLastFrameCheck() {
if (cx->isExceptionPending() &&
!JS_IsRunning(cx) &&
!cx->options().dontReportUncaught()) {
js_ReportUncaughtException(cx);
}
}
private:
JSContext *cx;
MOZ_DECL_USE_GUARD_OBJECT_NOTIFIER
};
/* Use the fastest available getc. */
#if defined(HAVE_GETC_UNLOCKED)
# define fast_getc getc_unlocked
#elif defined(HAVE__GETC_NOLOCK)
# define fast_getc _getc_nolock
#else
# define fast_getc getc
#endif
typedef js::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)
{
JS_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, js_GetErrorMessage, nullptr, JSMSG_CANT_OPEN,
filename, "No such file or directory");
return false;
}
}
return true;
}
JSObject * const JS::ReadOnlyCompileOptions::nullObjectPtr = nullptr;
void
JS::ReadOnlyCompileOptions::copyPODOptions(const ReadOnlyCompileOptions &rhs)
{
version = rhs.version;
versionSet = rhs.versionSet;
utf8 = rhs.utf8;
lineno = rhs.lineno;
column = rhs.column;
compileAndGo = rhs.compileAndGo;
forEval = rhs.forEval;
noScriptRval = rhs.noScriptRval;
selfHostingMode = rhs.selfHostingMode;
canLazilyParse = rhs.canLazilyParse;
strictOption = rhs.strictOption;
extraWarningsOption = rhs.extraWarningsOption;
werrorOption = rhs.werrorOption;
asmJSOption = rhs.asmJSOption;
sourcePolicy = rhs.sourcePolicy;
introductionType = rhs.introductionType;
introductionLineno = rhs.introductionLineno;
introductionOffset = rhs.introductionOffset;
hasIntroductionInfo = rhs.hasIntroductionInfo;
}
JSPrincipals *
JS::ReadOnlyCompileOptions::originPrincipals(ExclusiveContext *cx) const
{
return NormalizeOriginPrincipals(cx->compartment()->principals, originPrincipals_);
}
JS::OwningCompileOptions::OwningCompileOptions(JSContext *cx)
: ReadOnlyCompileOptions(),
runtime(GetRuntime(cx)),
elementRoot(cx),
elementAttributeNameRoot(cx),
introductionScriptRoot(cx)
{
}
JS::OwningCompileOptions::~OwningCompileOptions()
{
if (originPrincipals_)
JS_DropPrincipals(runtime, originPrincipals_);
// OwningCompileOptions always owns these, so these casts are okay.
js_free(const_cast<char *>(filename_));
js_free(const_cast<jschar *>(sourceMapURL_));
js_free(const_cast<char *>(introducerFilename_));
}
bool
JS::OwningCompileOptions::copy(JSContext *cx, const ReadOnlyCompileOptions &rhs)
{
copyPODOptions(rhs);
setOriginPrincipals(rhs.originPrincipals(cx));
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 jschar *s)
{
jschar *copy = nullptr;
if (s) {
copy = js_strdup(cx, s);
if (!copy)
return false;
}
// OwningCompileOptions always owns sourceMapURL_, so this cast is okay.
js_free(const_cast<jschar *>(sourceMapURL_));
sourceMapURL_ = copy;
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;
}
bool
JS::OwningCompileOptions::wrap(JSContext *cx, JSCompartment *compartment)
{
if (!compartment->wrap(cx, &elementRoot))
return false;
if (elementAttributeNameRoot) {
if (!compartment->wrap(cx, elementAttributeNameRoot.address()))
return false;
}
// There is no equivalent of cross-compartment wrappers for scripts. If
// the introduction script would be in a different compartment from the
// compiled code, we would be creating a cross-compartment script
// reference, which would be bogus. In that case, just don't bother to
// retain the introduction script.
if (introductionScriptRoot) {
if (introductionScriptRoot->compartment() != compartment)
introductionScriptRoot = nullptr;
}
return true;
}
JS::CompileOptions::CompileOptions(JSContext *cx, JSVersion version)
: ReadOnlyCompileOptions(), elementRoot(cx), elementAttributeNameRoot(cx),
introductionScriptRoot(cx)
{
this->version = (version != JSVERSION_UNKNOWN) ? version : cx->findVersion();
compileAndGo = false;
noScriptRval = cx->options().noScriptRval();
strictOption = cx->options().strictMode();
extraWarningsOption = cx->options().extraWarnings();
werrorOption = cx->options().werror();
asmJSOption = cx->runtime()->options().asmJS();
}
bool
JS::CompileOptions::wrap(JSContext *cx, JSCompartment *compartment)
{
if (!compartment->wrap(cx, &elementRoot))
return false;
if (elementAttributeNameRoot) {
if (!compartment->wrap(cx, elementAttributeNameRoot.address()))
return false;
}
// There is no equivalent of cross-compartment wrappers for scripts. If
// the introduction script would be in a different compartment from the
// compiled code, we would be creating a cross-compartment script
// reference, which would be bogus. In that case, just don't bother to
// retain the introduction script.
if (introductionScriptRoot) {
if (introductionScriptRoot->compartment() != compartment)
introductionScriptRoot = nullptr;
}
return true;
}
JSScript *
JS::Compile(JSContext *cx, HandleObject obj, const ReadOnlyCompileOptions &options,
const jschar *chars, size_t length)
{
JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
AutoLastFrameCheck lfc(cx);
return frontend::CompileScript(cx, &cx->tempLifoAlloc(), obj, NullPtr(), options, chars, length);
}
JSScript *
JS::Compile(JSContext *cx, HandleObject obj, const ReadOnlyCompileOptions &options,
const char *bytes, size_t length)
{
jschar *chars;
if (options.utf8)
chars = UTF8CharsToNewTwoByteCharsZ(cx, UTF8Chars(bytes, length), &length).get();
else
chars = InflateString(cx, bytes, &length);
if (!chars)
return nullptr;
JSScript *script = Compile(cx, obj, options, chars, length);
js_free(chars);
return script;
}
JSScript *
JS::Compile(JSContext *cx, HandleObject obj, const ReadOnlyCompileOptions &options, FILE *fp)
{
FileContents buffer(cx);
if (!ReadCompleteFile(cx, fp, buffer))
return nullptr;
JSScript *script = Compile(cx, obj, options, buffer.begin(), buffer.length());
return script;
}
JSScript *
JS::Compile(JSContext *cx, HandleObject obj, const ReadOnlyCompileOptions &optionsArg, const char *filename)
{
AutoFile file;
if (!file.open(cx, filename))
return nullptr;
CompileOptions options(cx, optionsArg);
options.setFileAndLine(filename, 1);
JSScript *script = Compile(cx, obj, options, file.fp());
return script;
}
JS_PUBLIC_API(bool)
JS::CanCompileOffThread(JSContext *cx, const ReadOnlyCompileOptions &options, size_t length)
{
static const size_t TINY_LENGTH = 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;
#ifdef JS_THREADSAFE
// 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;
#endif // JS_THREADSAFE
}
return cx->runtime()->canUseParallelParsing();
}
JS_PUBLIC_API(bool)
JS::CompileOffThread(JSContext *cx, Handle<JSObject*> obj, const ReadOnlyCompileOptions &options,
const jschar *chars, size_t length,
OffThreadCompileCallback callback, void *callbackData)
{
JS_ASSERT(CanCompileOffThread(cx, options, length));
return StartOffThreadParseScript(cx, options, chars, length, obj, callback, callbackData);
}
JS_PUBLIC_API(JSScript *)
JS::FinishOffThreadScript(JSContext *maybecx, JSRuntime *rt, void *token)
{
#ifdef JS_THREADSAFE
JS_ASSERT(CurrentThreadCanAccessRuntime(rt));
Maybe<AutoLastFrameCheck> lfc;
if (maybecx)
lfc.construct(maybecx);
return WorkerThreadState().finishParseTask(maybecx, rt, token);
#else
MOZ_ASSUME_UNREACHABLE("Off thread compilation is not available.");
#endif
}
JS_PUBLIC_API(JSScript *)
JS_CompileScript(JSContext *cx, JS::HandleObject obj, const char *ascii,
size_t length, const JS::CompileOptions &options)
{
return Compile(cx, obj, options, ascii, length);
}
JS_PUBLIC_API(JSScript *)
JS_CompileUCScript(JSContext *cx, JS::HandleObject obj, const jschar *chars,
size_t length, const JS::CompileOptions &options)
{
return Compile(cx, obj, options, chars, length);
}
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();
jschar *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);
options.setCompileAndGo(false);
Parser<frontend::FullParseHandler> parser(cx, &cx->tempLifoAlloc(),
options, chars, length,
/* foldConstants = */ true, nullptr, nullptr);
JSErrorReporter older = JS_SetErrorReporter(cx, nullptr);
if (!parser.parse(obj)) {
// 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, older);
js_free(chars);
return result;
}
JS_PUBLIC_API(JSObject *)
JS_GetGlobalFromScript(JSScript *script)
{
JS_ASSERT(!script->isCachedEval());
return &script->global();
}
JS_PUBLIC_API(JSFunction *)
JS::CompileFunction(JSContext *cx, HandleObject obj, const ReadOnlyCompileOptions &options,
const char *name, unsigned nargs, const char *const *argnames,
const jschar *chars, size_t length)
{
JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
AutoLastFrameCheck lfc(cx);
RootedAtom funAtom(cx);
if (name) {
funAtom = Atomize(cx, name, strlen(name));
if (!funAtom)
return nullptr;
}
AutoNameVector formals(cx);
for (unsigned i = 0; i < nargs; i++) {
RootedAtom argAtom(cx, Atomize(cx, argnames[i], strlen(argnames[i])));
if (!argAtom || !formals.append(argAtom->asPropertyName()))
return nullptr;
}
RootedFunction fun(cx, NewFunction(cx, NullPtr(), nullptr, 0, JSFunction::INTERPRETED, obj,
funAtom, JSFunction::FinalizeKind, TenuredObject));
if (!fun)
return nullptr;
if (!frontend::CompileFunctionBody(cx, &fun, options, formals, chars, length))
return nullptr;
if (obj && funAtom && options.defineOnScope) {
Rooted<jsid> id(cx, AtomToId(funAtom));
RootedValue value(cx, ObjectValue(*fun));
if (!JSObject::defineGeneric(cx, obj, id, value, nullptr, nullptr, JSPROP_ENUMERATE))
return nullptr;
}
return fun;
}
JS_PUBLIC_API(JSFunction *)
JS::CompileFunction(JSContext *cx, HandleObject obj, const ReadOnlyCompileOptions &options,
const char *name, unsigned nargs, const char *const *argnames,
const char *bytes, size_t length)
{
jschar *chars;
if (options.utf8)
chars = UTF8CharsToNewTwoByteCharsZ(cx, UTF8Chars(bytes, length), &length).get();
else
chars = InflateString(cx, bytes, &length);
if (!chars)
return nullptr;
JSFunction *fun = CompileFunction(cx, obj, options, name, nargs, argnames, chars, length);
js_free(chars);
return fun;
}
JS_PUBLIC_API(JSFunction *)
JS_CompileUCFunction(JSContext *cx, JS::HandleObject obj, const char *name,
unsigned nargs, const char *const *argnames,
const jschar *chars, size_t length,
const CompileOptions &options)
{
return CompileFunction(cx, obj, options, name, nargs, argnames, chars, length);
}
JS_PUBLIC_API(JSFunction *)
JS_CompileFunction(JSContext *cx, JS::HandleObject obj, const char *name,
unsigned nargs, const char *const *argnames,
const char *ascii, size_t length,
const JS::CompileOptions &options)
{
return CompileFunction(cx, obj, options, name, nargs, argnames, ascii, length);
}
JS_PUBLIC_API(JSString *)
JS_DecompileScript(JSContext *cx, HandleScript script, const char *name, unsigned indent)
{
JS_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) : js_NewStringCopyZ<CanGC>(cx, "[no source]");
}
JS_PUBLIC_API(JSString *)
JS_DecompileFunction(JSContext *cx, HandleFunction fun, unsigned indent)
{
JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, fun);
return FunctionToString(cx, fun, false, !(indent & JS_DONT_PRETTY_PRINT));
}
JS_PUBLIC_API(JSString *)
JS_DecompileFunctionBody(JSContext *cx, HandleFunction fun, unsigned indent)
{
JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, fun);
return FunctionToString(cx, fun, true, !(indent & JS_DONT_PRETTY_PRINT));
}
MOZ_NEVER_INLINE static bool
ExecuteScript(JSContext *cx, HandleObject obj, HandleScript scriptArg, jsval *rval)
{
RootedScript script(cx, scriptArg);
JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
if (cx->compartment() != obj->compartment())
*(volatile int *) 0 = 0xf0;
AutoLastFrameCheck lfc(cx);
/*
* Mozilla caches pre-compiled scripts (e.g., in the XUL prototype cache)
* and runs them against multiple globals. With a compartment per global,
* this requires cloning the pre-compiled script into each new global.
* Since each script gets run once, there is no point in trying to cache
* this clone. Ideally, this would be handled at some pinch point in
* mozilla, but there doesn't seem to be one, so we handle it here.
*/
if (script->compartment() != obj->compartment()) {
script = CloneScript(cx, NullPtr(), NullPtr(), script);
if (!script.get())
return false;
} else {
script = scriptArg;
}
return Execute(cx, script, *obj, rval);
}
MOZ_NEVER_INLINE JS_PUBLIC_API(bool)
JS_ExecuteScript(JSContext *cx, HandleObject obj, HandleScript scriptArg, MutableHandleValue rval)
{
return ExecuteScript(cx, obj, scriptArg, rval.address());
}
MOZ_NEVER_INLINE JS_PUBLIC_API(bool)
JS_ExecuteScript(JSContext *cx, HandleObject obj, HandleScript scriptArg)
{
return ExecuteScript(cx, obj, scriptArg, nullptr);
}
JS_PUBLIC_API(bool)
JS_ExecuteScriptVersion(JSContext *cx, HandleObject obj, HandleScript script,
MutableHandleValue rval, JSVersion version)
{
return ExecuteScript(cx, obj, script, rval.address());
}
JS_PUBLIC_API(bool)
JS_ExecuteScriptVersion(JSContext *cx, HandleObject obj, HandleScript script, JSVersion version)
{
return ExecuteScript(cx, obj, script, nullptr);
}
static const unsigned LARGE_SCRIPT_LENGTH = 500*1024;
static bool
Evaluate(JSContext *cx, HandleObject obj, const ReadOnlyCompileOptions &optionsArg,
const jschar *chars, size_t length, JS::Value *rval)
{
CompileOptions options(cx, optionsArg);
JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
AutoLastFrameCheck lfc(cx);
options.setCompileAndGo(obj->is<GlobalObject>());
options.setNoScriptRval(!rval);
SourceCompressionTask sct(cx);
RootedScript script(cx, frontend::CompileScript(cx, &cx->tempLifoAlloc(),
obj, NullPtr(), options,
chars, length, nullptr, 0, &sct));
if (!script)
return false;
JS_ASSERT(script->getVersion() == options.version);
bool result = Execute(cx, script, *obj, rval);
if (!sct.complete())
result = false;
// After evaluation, the compiled script will not be run again.
// script->ensureRanAnalysis allocated 1 analyze::Bytecode for every opcode
// which for large scripts means significant memory. Perform a GC eagerly
// to clear out this analysis data before anything happens to inhibit the
// flushing of this memory (such as setting requestAnimationFrame).
if (script->length() > LARGE_SCRIPT_LENGTH) {
script = nullptr;
PrepareZoneForGC(cx->zone());
GC(cx->runtime(), GC_NORMAL, JS::gcreason::FINISH_LARGE_EVALUTE);
}
return result;
}
static bool
Evaluate(JSContext *cx, HandleObject obj, const ReadOnlyCompileOptions &options,
const char *bytes, size_t length, JS::Value *rval)
{
jschar *chars;
if (options.utf8)
chars = UTF8CharsToNewTwoByteCharsZ(cx, JS::UTF8Chars(bytes, length), &length).get();
else
chars = InflateString(cx, bytes, &length);
if (!chars)
return false;
bool ok = ::Evaluate(cx, obj, options, chars, length, rval);
js_free(chars);
return ok;
}
static bool
Evaluate(JSContext *cx, HandleObject obj, const ReadOnlyCompileOptions &optionsArg,
const char *filename, JS::Value *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, obj, options, buffer.begin(), buffer.length(), rval);
}
extern JS_PUBLIC_API(bool)
JS::Evaluate(JSContext *cx, HandleObject obj, const ReadOnlyCompileOptions &optionsArg,
const jschar *chars, size_t length, MutableHandleValue rval)
{
return ::Evaluate(cx, obj, optionsArg, chars, length, rval.address());
}
extern JS_PUBLIC_API(bool)
JS::Evaluate(JSContext *cx, HandleObject obj, const ReadOnlyCompileOptions &options,
const char *bytes, size_t length, MutableHandleValue rval)
{
return ::Evaluate(cx, obj, options, bytes, length, rval.address());
}
extern JS_PUBLIC_API(bool)
JS::Evaluate(JSContext *cx, HandleObject obj, const ReadOnlyCompileOptions &optionsArg,
const char *filename, MutableHandleValue rval)
{
return ::Evaluate(cx, obj, optionsArg, filename, rval.address());
}
extern JS_PUBLIC_API(bool)
JS::Evaluate(JSContext *cx, HandleObject obj, const ReadOnlyCompileOptions &optionsArg,
const jschar *chars, size_t length)
{
return ::Evaluate(cx, obj, optionsArg, chars, length, nullptr);
}
extern JS_PUBLIC_API(bool)
JS::Evaluate(JSContext *cx, HandleObject obj, const ReadOnlyCompileOptions &options,
const char *bytes, size_t length)
{
return ::Evaluate(cx, obj, options, bytes, length, nullptr);
}
extern JS_PUBLIC_API(bool)
JS::Evaluate(JSContext *cx, HandleObject obj, const ReadOnlyCompileOptions &optionsArg,
const char *filename)
{
return ::Evaluate(cx, obj, optionsArg, filename, nullptr);
}
JS_PUBLIC_API(bool)
JS_EvaluateUCScript(JSContext *cx, HandleObject obj, const jschar *chars, unsigned length,
const char *filename, unsigned lineno, MutableHandleValue rval)
{
CompileOptions options(cx);
options.setFileAndLine(filename, lineno);
return ::Evaluate(cx, obj, options, chars, length, rval.address());
}
JS_PUBLIC_API(bool)
JS_EvaluateScript(JSContext *cx, HandleObject obj, const char *bytes, unsigned nbytes,
const char *filename, unsigned lineno, MutableHandleValue rval)
{
CompileOptions options(cx);
options.setFileAndLine(filename, lineno);
return ::Evaluate(cx, obj, options, bytes, nbytes, rval.address());
}
JS_PUBLIC_API(bool)
JS_EvaluateScript(JSContext *cx, HandleObject obj, const char *bytes, unsigned nbytes,
const char *filename, unsigned lineno)
{
CompileOptions options(cx);
options.setFileAndLine(filename, lineno);
return ::Evaluate(cx, obj, options, bytes, nbytes, nullptr);
}
JS_PUBLIC_API(bool)
JS_CallFunction(JSContext *cx, HandleObject obj, HandleFunction fun, const HandleValueArray& args,
MutableHandleValue rval)
{
JS_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)
{
JS_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 (!JSObject::getGeneric(cx, obj, obj, id, &v))
return false;
return Invoke(cx, ObjectOrNullValue(obj), v, args.length(), args.begin(), rval);
}
JS_PUBLIC_API(bool)
JS_CallFunctionValue(JSContext *cx, HandleObject obj, HandleValue fval, const HandleValueArray& args,
MutableHandleValue rval)
{
JS_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::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(JSObject *)
JS_New(JSContext *cx, HandleObject ctor, const JS::HandleValueArray& inputArgs)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, ctor, inputArgs);
AutoLastFrameCheck lfc(cx);
// This is not a simple variation of JS_CallFunctionValue because JSOP_NEW
// is not a simple variation of JSOP_CALL. We have to determine what class
// of object to create, create it, and clamp the return value to an object,
// among other details. InvokeConstructor does the hard work.
InvokeArgs args(cx);
if (!args.init(inputArgs.length()))
return nullptr;
args.setCallee(ObjectValue(*ctor));
args.setThis(NullValue());
PodCopy(args.array(), inputArgs.begin(), inputArgs.length());
if (!InvokeConstructor(cx, args))
return nullptr;
if (!args.rval().isObject()) {
/*
* Although constructors may return primitives (via proxies), this
* API is asking for an object, so we report an error.
*/
JSAutoByteString bytes;
if (js_ValueToPrintable(cx, args.rval(), &bytes)) {
JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_BAD_NEW_RESULT,
bytes.ptr());
}
return nullptr;
}
return &args.rval().toObject();
}
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;
}
JS_PUBLIC_API(void)
JS_RequestInterruptCallback(JSRuntime *rt)
{
rt->requestInterrupt(JSRuntime::RequestInterruptAnyThread);
}
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();
}
#ifdef MOZ_TRACE_JSCALLS
JS_PUBLIC_API(void)
JS_SetFunctionCallback(JSContext *cx, JSFunctionCallback fcb)
{
cx->functionCallback = fcb;
}
JS_PUBLIC_API(JSFunctionCallback)
JS_GetFunctionCallback(JSContext *cx)
{
return cx->functionCallback;
}
#endif
/************************************************************************/
JS_PUBLIC_API(JSString *)
JS_NewStringCopyN(JSContext *cx, const char *s, size_t n)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!n)
return cx->names().empty;
return js_NewStringCopyN<CanGC>(cx, s, n);
}
JS_PUBLIC_API(JSString *)
JS_NewStringCopyZ(JSContext *cx, const char *s)
{
size_t n;
jschar *js;
JSString *str;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!s || !*s)
return cx->runtime()->emptyString;
n = strlen(s);
js = InflateString(cx, s, &n);
if (!js)
return nullptr;
str = js_NewString<CanGC>(cx, js, n);
if (!str)
js_free(js);
return str;
}
JS_PUBLIC_API(bool)
JS_StringHasBeenInterned(JSContext *cx, JSString *str)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!str->isAtom())
return false;
return AtomIsInterned(cx, &str->asAtom());
}
JS_PUBLIC_API(jsid)
INTERNED_STRING_TO_JSID(JSContext *cx, JSString *str)
{
JS_ASSERT(str);
JS_ASSERT(((size_t)str & JSID_TYPE_MASK) == 0);
JS_ASSERT_IF(cx, JS_StringHasBeenInterned(cx, str));
return AtomToId(&str->asAtom());
}
JS_PUBLIC_API(JSString *)
JS_InternJSString(JSContext *cx, HandleString str)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSAtom *atom = AtomizeString(cx, str, InternAtom);
JS_ASSERT_IF(atom, JS_StringHasBeenInterned(cx, atom));
return atom;
}
JS_PUBLIC_API(JSString *)
JS_InternString(JSContext *cx, const char *s)
{
return JS_InternStringN(cx, s, strlen(s));
}
JS_PUBLIC_API(JSString *)
JS_InternStringN(JSContext *cx, const char *s, size_t length)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSAtom *atom = Atomize(cx, s, length, InternAtom);
JS_ASSERT_IF(atom, JS_StringHasBeenInterned(cx, atom));
return atom;
}
JS_PUBLIC_API(JSString *)
JS_NewUCString(JSContext *cx, jschar *chars, size_t length)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_NewString<CanGC>(cx, chars, length);
}
JS_PUBLIC_API(JSString *)
JS_NewUCStringCopyN(JSContext *cx, const jschar *s, size_t n)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!n)
return cx->names().empty;
return js_NewStringCopyN<CanGC>(cx, s, n);
}
JS_PUBLIC_API(JSString *)
JS_NewUCStringCopyZ(JSContext *cx, const jschar *s)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!s)
return cx->runtime()->emptyString;
return js_NewStringCopyZ<CanGC>(cx, s);
}
JS_PUBLIC_API(JSString *)
JS_InternUCStringN(JSContext *cx, const jschar *s, size_t length)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSAtom *atom = AtomizeChars(cx, s, length, InternAtom);
JS_ASSERT_IF(atom, JS_StringHasBeenInterned(cx, atom));
return atom;
}
JS_PUBLIC_API(JSString *)
JS_InternUCString(JSContext *cx, const jschar *s)
{
return JS_InternUCStringN(cx, s, js_strlen(s));
}
JS_PUBLIC_API(size_t)
JS_GetStringLength(JSString *str)
{
return str->length();
}
JS_PUBLIC_API(const jschar *)
JS_GetStringCharsZ(JSContext *cx, JSString *str)
{
size_t dummy;
return JS_GetStringCharsZAndLength(cx, str, &dummy);
}
JS_PUBLIC_API(const jschar *)
JS_GetStringCharsZAndLength(JSContext *cx, JSString *str, size_t *plength)
{
/*
* Don't require |cx->compartment()| to be |str|'s compartment. We don't need
* it, and it's annoying for callers.
*/
JS_ASSERT(plength);
AssertHeapIsIdleOrStringIsFlat(cx, str);
CHECK_REQUEST(cx);
JSFlatString *flat = str->ensureFlat(cx);
if (!flat)
return nullptr;
*plength = flat->length();
return flat->chars();
}
JS_PUBLIC_API(const jschar *)
JS_GetStringCharsAndLength(JSContext *cx, JSString *str, size_t *plength)
{
JS_ASSERT(plength);
AssertHeapIsIdleOrStringIsFlat(cx, str);
CHECK_REQUEST(cx);
assertSameCompartment(cx, str);
JSLinearString *linear = str->ensureLinear(cx);
if (!linear)
return nullptr;
*plength = linear->length();
return linear->chars();
}
JS_PUBLIC_API(const jschar *)
JS_GetInternedStringChars(JSString *str)
{
JS_ASSERT(str->isAtom());
JSFlatString *flat = str->ensureFlat(nullptr);
if (!flat)
return nullptr;
return flat->chars();
}
JS_PUBLIC_API(const jschar *)
JS_GetInternedStringCharsAndLength(JSString *str, size_t *plength)
{
JS_ASSERT(str->isAtom());
JS_ASSERT(plength);
JSFlatString *flat = str->ensureFlat(nullptr);
if (!flat)
return nullptr;
*plength = flat->length();
return flat->chars();
}
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 jschar *)
JS_GetFlatStringChars(JSFlatString *str)
{
return str->chars();
}
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 js_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, jschar *dst, size_t *dstlenp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (!dst) {
*dstlenp = srclen;
return true;
}
size_t dstlen = *dstlenp;
if (srclen > dstlen) {
InflateStringToBuffer(src, dstlen, dst);
AutoSuppressGC suppress(cx);
JS_ReportErrorNumber(cx, js_GetErrorMessage, nullptr, JSMSG_BUFFER_TOO_SMALL);
return false;
}
InflateStringToBuffer(src, srclen, dst);
*dstlenp = srclen;
return true;
}
JS_PUBLIC_API(char *)
JS_EncodeString(JSContext *cx, JSString *str)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSLinearString *linear = str->ensureLinear(cx);
if (!linear)
return nullptr;
return LossyTwoByteCharsToNewLatin1CharsZ(cx, linear->range()).c_str();
}
JS_PUBLIC_API(char *)
JS_EncodeStringToUTF8(JSContext *cx, HandleString str)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JSLinearString *linear = str->ensureLinear(cx);
if (!linear)
return nullptr;
return TwoByteCharsToNewUTF8CharsZ(cx, linear->range()).c_str();
}
JS_PUBLIC_API(size_t)
JS_GetStringEncodingLength(JSContext *cx, JSString *str)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
const jschar *chars = str->getChars(cx);
if (!chars)
return size_t(-1);
return str->length();
}
JS_PUBLIC_API(size_t)
JS_EncodeStringToBuffer(JSContext *cx, JSString *str, char *buffer, size_t length)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
/*
* FIXME bug 612141 - fix DeflateStringToBuffer interface so the result
* would allow to distinguish between insufficient buffer and encoding
* error.
*/
size_t writtenLength = length;
const jschar *chars = str->getChars(nullptr);
if (!chars)
return size_t(-1);
if (DeflateStringToBuffer(nullptr, chars, str->length(), buffer, &writtenLength)) {
JS_ASSERT(writtenLength <= length);
return writtenLength;
}
JS_ASSERT(writtenLength <= length);
size_t necessaryLength = str->length();
if (necessaryLength == size_t(-1))
return size_t(-1);
JS_ASSERT(writtenLength == length); // C strings are NOT encoded.
return necessaryLength;
}
JS_PUBLIC_API(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 (!js_Stringify(cx, vp, replacer, space, sb))
return false;
if (sb.empty()) {
HandlePropertyName null = cx->names().null;
return callback(null->chars(), null->length(), data);
}
return callback(sb.begin(), sb.length(), data);
}
JS_PUBLIC_API(bool)
JS_ParseJSON(JSContext *cx, const jschar *chars, uint32_t len, JS::MutableHandleValue vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RootedValue reviver(cx, NullValue());
return ParseJSONWithReviver(cx, ConstTwoByteChars(chars, len), len, reviver, vp);
}
JS_PUBLIC_API(bool)
JS_ParseJSONWithReviver(JSContext *cx, const jschar *chars, uint32_t len, HandleValue reviver, MutableHandleValue vp)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return ParseJSONWithReviver(cx, ConstTwoByteChars(chars, len), len, reviver, vp);
}
/************************************************************************/
JS_PUBLIC_API(void)
JS_ReportError(JSContext *cx, const char *format, ...)
{
va_list ap;
AssertHeapIsIdle(cx);
va_start(ap, format);
js_ReportErrorVA(cx, JSREPORT_ERROR, format, ap);
va_end(ap);
}
JS_PUBLIC_API(void)
JS_ReportErrorNumber(JSContext *cx, JSErrorCallback errorCallback,
void *userRef, const unsigned errorNumber, ...)
{
va_list ap;
va_start(ap, errorNumber);
JS_ReportErrorNumberVA(cx, errorCallback, userRef, errorNumber, ap);
va_end(ap);
}
JS_PUBLIC_API(void)
JS_ReportErrorNumberVA(JSContext *cx, JSErrorCallback errorCallback,
void *userRef, const unsigned errorNumber,
va_list ap)
{
AssertHeapIsIdle(cx);
js_ReportErrorNumberVA(cx, JSREPORT_ERROR, errorCallback, userRef,
errorNumber, ArgumentsAreASCII, ap);
}
JS_PUBLIC_API(void)
JS_ReportErrorNumberUC(JSContext *cx, JSErrorCallback errorCallback,
void *userRef, const unsigned errorNumber, ...)
{
va_list ap;
AssertHeapIsIdle(cx);
va_start(ap, errorNumber);
js_ReportErrorNumberVA(cx, JSREPORT_ERROR, errorCallback, userRef,
errorNumber, ArgumentsAreUnicode, ap);
va_end(ap);
}
JS_PUBLIC_API(void)
JS_ReportErrorNumberUCArray(JSContext *cx, JSErrorCallback errorCallback,
void *userRef, const unsigned errorNumber,
const jschar **args)
{
AssertHeapIsIdle(cx);
js_ReportErrorNumberUCArray(cx, JSREPORT_ERROR, errorCallback, userRef,
errorNumber, args);
}
JS_PUBLIC_API(bool)
JS_ReportWarning(JSContext *cx, const char *format, ...)
{
va_list ap;
bool ok;
AssertHeapIsIdle(cx);
va_start(ap, format);
ok = js_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 = js_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 = js_ReportErrorNumberVA(cx, flags, errorCallback, userRef,
errorNumber, ArgumentsAreUnicode, ap);
va_end(ap);
return ok;
}
JS_PUBLIC_API(void)
JS_ReportOutOfMemory(JSContext *cx)
{
js_ReportOutOfMemory(cx);
}
JS_PUBLIC_API(void)
JS_ReportAllocationOverflow(JSContext *cx)
{
js_ReportAllocationOverflow(cx);
}
JS_PUBLIC_API(JSErrorReporter)
JS_GetErrorReporter(JSContext *cx)
{
return cx->errorReporter;
}
JS_PUBLIC_API(JSErrorReporter)
JS_SetErrorReporter(JSContext *cx, JSErrorReporter er)
{
JSErrorReporter older;
older = cx->errorReporter;
cx->errorReporter = er;
return older;
}
/************************************************************************/
/*
* Dates.
*/
JS_PUBLIC_API(JSObject *)
JS_NewDateObject(JSContext *cx, int year, int mon, int mday, int hour, int min, int sec)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_NewDateObject(cx, year, mon, mday, hour, min, sec);
}
JS_PUBLIC_API(JSObject *)
JS_NewDateObjectMsec(JSContext *cx, double msec)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return js_NewDateObjectMsec(cx, msec);
}
JS_PUBLIC_API(bool)
JS_ObjectIsDate(JSContext *cx, HandleObject obj)
{
assertSameCompartment(cx, obj);
return ObjectClassIs(obj, ESClass_Date, cx);
}
JS_PUBLIC_API(void)
JS_ClearDateCaches(JSContext *cx)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
cx->runtime()->dateTimeInfo.updateTimeZoneAdjustment();
}
/************************************************************************/
/*
* Regular Expressions.
*/
JS_PUBLIC_API(JSObject *)
JS_NewRegExpObject(JSContext *cx, HandleObject obj, char *bytes, size_t length, unsigned flags)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
jschar *chars = InflateString(cx, bytes, &length);
if (!chars)
return nullptr;
RegExpStatics *res = obj->as<GlobalObject>().getRegExpStatics();
RegExpObject *reobj = RegExpObject::create(cx, res, chars, length,
RegExpFlag(flags), nullptr);
js_free(chars);
return reobj;
}
JS_PUBLIC_API(JSObject *)
JS_NewUCRegExpObject(JSContext *cx, HandleObject obj, jschar *chars, size_t length,
unsigned flags)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RegExpStatics *res = obj->as<GlobalObject>().getRegExpStatics();
return RegExpObject::create(cx, res, chars, length,
RegExpFlag(flags), nullptr);
}
JS_PUBLIC_API(void)
JS_SetRegExpInput(JSContext *cx, HandleObject obj, HandleString input, bool multiline)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, input);
obj->as<GlobalObject>().getRegExpStatics()->reset(cx, input, !!multiline);
}
JS_PUBLIC_API(void)
JS_ClearRegExpStatics(JSContext *cx, HandleObject obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
JS_ASSERT(obj);
obj->as<GlobalObject>().getRegExpStatics()->clear();
}
JS_PUBLIC_API(bool)
JS_ExecuteRegExp(JSContext *cx, HandleObject obj, HandleObject reobj, jschar *chars,
size_t length, size_t *indexp, bool test, MutableHandleValue rval)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
RegExpStatics *res = obj->as<GlobalObject>().getRegExpStatics();
return ExecuteRegExpLegacy(cx, res, reobj->as<RegExpObject>(), NullPtr(), chars, length, indexp,
test, rval);
}
JS_PUBLIC_API(JSObject *)
JS_NewRegExpObjectNoStatics(JSContext *cx, char *bytes, size_t length, unsigned flags)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
jschar *chars = InflateString(cx, bytes, &length);
if (!chars)
return nullptr;
RegExpObject *reobj = RegExpObject::createNoStatics(cx, chars, length,
RegExpFlag(flags), nullptr);
js_free(chars);
return reobj;
}
JS_PUBLIC_API(JSObject *)
JS_NewUCRegExpObjectNoStatics(JSContext *cx, jschar *chars, size_t length, unsigned flags)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return RegExpObject::createNoStatics(cx, chars, length,
RegExpFlag(flags), nullptr);
}
JS_PUBLIC_API(bool)
JS_ExecuteRegExpNoStatics(JSContext *cx, HandleObject obj, jschar *chars, size_t length,
size_t *indexp, bool test, MutableHandleValue rval)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return ExecuteRegExpLegacy(cx, nullptr, obj->as<RegExpObject>(), NullPtr(), chars, length,
indexp, test, rval);
}
JS_PUBLIC_API(bool)
JS_ObjectIsRegExp(JSContext *cx, HandleObject obj)
{
assertSameCompartment(cx, obj);
return ObjectClassIs(obj, ESClass_RegExp, cx);
}
JS_PUBLIC_API(unsigned)
JS_GetRegExpFlags(JSContext *cx, HandleObject obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return obj->as<RegExpObject>().getFlags();
}
JS_PUBLIC_API(JSString *)
JS_GetRegExpSource(JSContext *cx, HandleObject obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
return obj->as<RegExpObject>().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, JSLocaleCallbacks *callbacks)
{
AssertHeapIsIdle(rt);
rt->localeCallbacks = callbacks;
}
JS_PUBLIC_API(JSLocaleCallbacks *)
JS_GetLocaleCallbacks(JSRuntime *rt)
{
/* This function can be called by a finalizer. */
return rt->localeCallbacks;
}
/************************************************************************/
JS_PUBLIC_API(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 = js_ReportUncaughtException(cx);
JS_ASSERT(!cx->isExceptionPending());
return ok;
}
JS::AutoSaveExceptionState::AutoSaveExceptionState(JSContext *cx)
: context(cx), wasThrowing(cx->throwing), exceptionValue(cx)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (wasThrowing) {
exceptionValue = cx->unwrappedException_;
cx->clearPendingException();
}
}
void
JS::AutoSaveExceptionState::restore()
{
context->throwing = wasThrowing;
context->unwrappedException_ = exceptionValue;
drop();
}
JS::AutoSaveExceptionState::~AutoSaveExceptionState()
{
if (wasThrowing && !context->isExceptionPending()) {
context->throwing = true;
context->unwrappedException_ = exceptionValue;
}
}
struct JSExceptionState {
bool throwing;
jsval exception;
};
JS_PUBLIC_API(JSExceptionState *)
JS_SaveExceptionState(JSContext *cx)
{
JSExceptionState *state;
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
state = cx->pod_malloc<JSExceptionState>();
if (state) {
state->throwing =
JS_GetPendingException(cx, MutableHandleValue::fromMarkedLocation(&state->exception));
if (state->throwing && JSVAL_IS_GCTHING(state->exception))
AddValueRoot(cx, &state->exception, "JSExceptionState.exception");
}
return state;
}
JS_PUBLIC_API(void)
JS_RestoreExceptionState(JSContext *cx, JSExceptionState *state)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (state) {
if (state->throwing)
JS_SetPendingException(cx, HandleValue::fromMarkedLocation(&state->exception));
else
JS_ClearPendingException(cx);
JS_DropExceptionState(cx, state);
}
}
JS_PUBLIC_API(void)
JS_DropExceptionState(JSContext *cx, JSExceptionState *state)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
if (state) {
if (state->throwing && JSVAL_IS_GCTHING(state->exception)) {
assertSameCompartment(cx, state->exception);
JS_RemoveValueRoot(cx, &state->exception);
}
js_free(state);
}
}
JS_PUBLIC_API(JSErrorReport *)
JS_ErrorFromException(JSContext *cx, HandleObject obj)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, obj);
return js_ErrorFromException(cx, obj);
}
JS_PUBLIC_API(bool)
JS_ThrowStopIteration(JSContext *cx)
{
AssertHeapIsIdle(cx);
return js_ThrowStopIteration(cx);
}
JS_PUBLIC_API(bool)
JS_IsStopIteration(jsval v)
{
return v.isObject() && v.toObject().is<StopIterationObject>();
}
JS_PUBLIC_API(intptr_t)
JS_GetCurrentThread()
{
#ifdef JS_THREADSAFE
return reinterpret_cast<intptr_t>(PR_GetCurrentThread());
#else
return 0;
#endif
}
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_SetGCZeal(JSContext *cx, uint8_t zeal, uint32_t frequency)
{
SetGCZeal(cx->runtime(), zeal, frequency);
}
JS_PUBLIC_API(void)
JS_ScheduleGC(JSContext *cx, uint32_t count)
{
cx->runtime()->gcNextScheduled = count;
}
#endif
JS_PUBLIC_API(void)
JS_SetParallelParsingEnabled(JSRuntime *rt, bool enabled)
{
#ifdef JS_ION
rt->setParallelParsingEnabled(enabled);
#endif
}
JS_PUBLIC_API(void)
JS_SetParallelIonCompilationEnabled(JSRuntime *rt, bool enabled)
{
#ifdef JS_ION
rt->setParallelIonCompilationEnabled(enabled);
#endif
}
JS_PUBLIC_API(void)
JS_SetGlobalJitCompilerOption(JSRuntime *rt, JSJitCompilerOption opt, uint32_t value)
{
#ifdef JS_ION
switch (opt) {
case JSJITCOMPILER_BASELINE_USECOUNT_TRIGGER:
if (value == uint32_t(-1)) {
jit::JitOptions defaultValues;
value = defaultValues.baselineUsesBeforeCompile;
}
jit::js_JitOptions.baselineUsesBeforeCompile = value;
break;
case JSJITCOMPILER_ION_USECOUNT_TRIGGER:
if (value == uint32_t(-1)) {
jit::js_JitOptions.resetUsesBeforeCompile();
break;
}
jit::js_JitOptions.setUsesBeforeCompile(value);
if (value == 0)
jit::js_JitOptions.setEagerCompilation();
break;
case JSJITCOMPILER_ION_ENABLE:
if (value == 1) {
JS::RuntimeOptionsRef(rt).setIon(true);
IonSpew(js::jit::IonSpew_Scripts, "Enable ion");
} else if (value == 0) {
JS::RuntimeOptionsRef(rt).setIon(false);
IonSpew(js::jit::IonSpew_Scripts, "Disable ion");
}
break;
case JSJITCOMPILER_BASELINE_ENABLE:
if (value == 1) {
JS::RuntimeOptionsRef(rt).setBaseline(true);
IonSpew(js::jit::IonSpew_BaselineScripts, "Enable baseline");
} else if (value == 0) {
JS::RuntimeOptionsRef(rt).setBaseline(false);
IonSpew(js::jit::IonSpew_BaselineScripts, "Disable baseline");
}
break;
default:
break;
}
#endif
}
JS_PUBLIC_API(int)
JS_GetGlobalJitCompilerOption(JSRuntime *rt, JSJitCompilerOption opt)
{
#ifdef JS_ION
switch (opt) {
case JSJITCOMPILER_BASELINE_USECOUNT_TRIGGER:
return jit::js_JitOptions.baselineUsesBeforeCompile;
case JSJITCOMPILER_ION_USECOUNT_TRIGGER:
return jit::js_JitOptions.forcedDefaultIonUsesBeforeCompile;
case JSJITCOMPILER_ION_ENABLE:
return JS::RuntimeOptionsRef(rt).ion();
case JSJITCOMPILER_BASELINE_ENABLE:
return JS::RuntimeOptionsRef(rt).baseline();
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;
}
namespace JS {
void
AutoFilename::reset(void *newScriptSource)
{
if (newScriptSource)
reinterpret_cast<ScriptSource*>(newScriptSource)->incref();
if (scriptSource_)
reinterpret_cast<ScriptSource*>(scriptSource_)->decref();
scriptSource_ = newScriptSource;
}
const char *
AutoFilename::get() const
{
JS_ASSERT(scriptSource_);
return reinterpret_cast<ScriptSource*>(scriptSource_)->filename();
}
JS_PUBLIC_API(bool)
DescribeScriptedCaller(JSContext *cx, AutoFilename *filename, unsigned *lineno)
{
if (lineno)
*lineno = 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)
filename->reset(i.scriptSource());
if (lineno)
*lineno = i.computeLine();
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.
JS_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()->mainThread.activation();
if (!act)
return;
act->hideScriptedCaller();
}
JS_PUBLIC_API(void)
UnhideScriptedCaller(JSContext *cx)
{
Activation *act = cx->runtime()->mainThread.activation();
if (!act)
return;
act->unhideScriptedCaller();
}
} /* namespace JS */
#ifdef JS_THREADSAFE
static PRStatus
CallOnce(void *func)
{
JSInitCallback init = JS_DATA_TO_FUNC_PTR(JSInitCallback, func);
return init() ? PR_SUCCESS : PR_FAILURE;
}
#endif
JS_PUBLIC_API(bool)
JS_CallOnce(JSCallOnceType *once, JSInitCallback func)
{
#ifdef JS_THREADSAFE
return PR_CallOnceWithArg(once, CallOnce, JS_FUNC_TO_DATA_PTR(void *, func)) == PR_SUCCESS;
#else
if (!*once) {
*once = true;
return func();
} else {
return true;
}
#endif
}
AutoGCRooter::AutoGCRooter(JSContext *cx, ptrdiff_t tag)
: down(ContextFriendFields::get(cx)->autoGCRooters),
tag_(tag),
stackTop(&ContextFriendFields::get(cx)->autoGCRooters)
{
JS_ASSERT(this != *stackTop);
*stackTop = this;
}
AutoGCRooter::AutoGCRooter(ContextFriendFields *cx, ptrdiff_t tag)
: down(cx->autoGCRooters),
tag_(tag),
stackTop(&cx->autoGCRooters)
{
JS_ASSERT(this != *stackTop);
*stackTop = this;
}
#ifdef DEBUG
JS_PUBLIC_API(void)
JS::AssertArgumentsAreSane(JSContext *cx, HandleValue value)
{
AssertHeapIsIdle(cx);
CHECK_REQUEST(cx);
assertSameCompartment(cx, value);
}
#endif /* 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);
RootedObject funobj(cx, funobjArg);
if (!encoder.codeFunction(&funobj))
return nullptr;
return encoder.forgetData(lengthp);
}
JS_PUBLIC_API(JSScript *)
JS_DecodeScript(JSContext *cx, const void *data, uint32_t length,
JSPrincipals *principals, JSPrincipals *originPrincipals)
{
XDRDecoder decoder(cx, data, length, principals, originPrincipals);
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,
JSPrincipals *principals, JSPrincipals *originPrincipals)
{
XDRDecoder decoder(cx, data, length, principals, originPrincipals);
RootedObject funobj(cx);
if (!decoder.codeFunction(&funobj))
return nullptr;
return funobj;
}
JS_PUBLIC_API(bool)
JS_PreventExtensions(JSContext *cx, JS::HandleObject obj)
{
bool extensible;
if (!JSObject::isExtensible(cx, obj, &extensible))
return false;
if (!extensible)
return true;
return JSObject::preventExtensions(cx, obj);
}
JS_PUBLIC_API(void)
JS::SetAsmJSCacheOps(JSRuntime *rt, const JS::AsmJSCacheOps *ops)
{
rt->asmJSCacheOps = *ops;
}
char *
JSAutoByteString::encodeLatin1(ExclusiveContext *cx, JSString *str)
{
JSLinearString *linear = str->ensureLinear(cx);
if (!linear)
return nullptr;
mBytes = LossyTwoByteCharsToNewLatin1CharsZ(cx, linear->range()).c_str();
return mBytes;
}
JS_PUBLIC_API(void)
JS::SetLargeAllocationFailureCallback(JSRuntime *rt, JS::LargeAllocationFailureCallback lafc)
{
rt->largeAllocationFailureCallback = lafc;
}
JS_PUBLIC_API(void)
JS::SetOutOfMemoryCallback(JSRuntime *rt, OutOfMemoryCallback cb)
{
rt->oomCallback = cb;
}
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