The Tor Browser: comparison js/src/jsapi.cpp

--1:000000000000
+:4664904299ee
+/* -*- 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_);
+}
+JSAutoNullCompartment::JSAutoNullCompartment(JSContext *cx)
+: cx_(cx),
+oldCompartment_(cx->compartment())
+{
+AssertHeapIsIdleOrIterating(cx_);
+cx_->enterNullCompartment();
+}
+JSAutoNullCompartment::~JSAutoNullCompartment()
+{
+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>());
+RootedValue origv(cx, ObjectValue(*origobj));
+RootedObject newIdentity(cx);
+{
+// Scope to make ~AutoMaybeTouchDeadZones do its GC before the return value is on the stack.
+AutoMaybeTouchDeadZones agc(cx);
+AutoDisableProxyCheck adpc(cx->runtime());
+JSCompartment *destination = target->compartment();
+if (origobj->compartment() == destination) {
+// If the original object is in the same compartment as the
+// destination, then we know that we won't find a wrapper in the
+// destination's cross compartment map and that the same
+// object will continue to work.
+if (!JSObject::swap(cx, origobj, target))
+MOZ_CRASH();
+newIdentity = origobj;
+} else if (WrapperMap::Ptr p = destination->lookupWrapper(origv)) {
+// There might already be a wrapper for the original object in
+// the new compartment. If there is, we use its identity and swap
+// in the contents of |target|.
+newIdentity = &p->value().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, JS::Heap<JS::Value> *vp)
+{
+AssertHeapIsIdle(cx);
+CHECK_REQUEST(cx);
+return AddValueRoot(cx, vp->unsafeGet(), nullptr);
+}
+JS_PUBLIC_API(bool)
+JS::AddStringRoot(JSContext *cx, JS::Heap<JSString *> *rp)
+{
+AssertHeapIsIdle(cx);
+CHECK_REQUEST(cx);
+return AddStringRoot(cx, rp->unsafeGet(), nullptr);
+}
+JS_PUBLIC_API(bool)
+JS::AddObjectRoot(JSContext *cx, JS::Heap<JSObject *> *rp)
+{
+AssertHeapIsIdle(cx);
+CHECK_REQUEST(cx);
+return AddObjectRoot(cx, rp->unsafeGet(), nullptr);
+}
+JS_PUBLIC_API(bool)
+JS::AddNamedValueRoot(JSContext *cx, JS::Heap<JS::Value> *vp, const char *name)
+{
+AssertHeapIsIdle(cx);
+CHECK_REQUEST(cx);
+return AddValueRoot(cx, vp->unsafeGet(), name);
+}
+JS_PUBLIC_API(bool)
+JS::AddNamedValueRootRT(JSRuntime *rt, JS::Heap<JS::Value> *vp, const char *name)
+{
+return AddValueRootRT(rt, vp->unsafeGet(), name);
+}
+JS_PUBLIC_API(bool)
+JS::AddNamedStringRoot(JSContext *cx, JS::Heap<JSString *> *rp, const char *name)
+{
+AssertHeapIsIdle(cx);
+CHECK_REQUEST(cx);
+return AddStringRoot(cx, rp->unsafeGet(), name);
+}
+JS_PUBLIC_API(bool)
+JS::AddNamedObjectRoot(JSContext *cx, JS::Heap<JSObject *> *rp, const char *name)
+{
+AssertHeapIsIdle(cx);
+CHECK_REQUEST(cx);
+return AddObjectRoot(cx, rp->unsafeGet(), name);
+}
+JS_PUBLIC_API(bool)
+JS::AddNamedScriptRoot(JSContext *cx, JS::Heap<JSScript *> *rp, const char *name)
+{
+AssertHeapIsIdle(cx);
+CHECK_REQUEST(cx);
+return AddScriptRoot(cx, rp->unsafeGet(), name);
+}
+/* We allow unrooting from finalizers within the GC */
+JS_PUBLIC_API(void)
+JS::RemoveValueRoot(JSContext *cx, JS::Heap<JS::Value> *vp)
+{
+CHECK_REQUEST(cx);
+RemoveRoot(cx->runtime(), (void *)vp);
+*vp = UndefinedValue();
+}
+JS_PUBLIC_API(void)
+JS::RemoveStringRoot(JSContext *cx, JS::Heap<JSString *> *rp)
+{
+CHECK_REQUEST(cx);
+RemoveRoot(cx->runtime(), (void *)rp);
+*rp = nullptr;
+}
+JS_PUBLIC_API(void)
+JS::RemoveObjectRoot(JSContext *cx, JS::Heap<JSObject *> *rp)
+{
+CHECK_REQUEST(cx);
+RemoveRoot(cx->runtime(), (void *)rp);
+*rp = nullptr;
+}
+JS_PUBLIC_API(void)
+JS::RemoveScriptRoot(JSContext *cx, JS::Heap<JSScript *> *rp)
+{
+CHECK_REQUEST(cx);
+RemoveRoot(cx->runtime(), (void *)rp);
+*rp = nullptr;
+}
+JS_PUBLIC_API(void)
+JS::RemoveValueRootRT(JSRuntime *rt, JS::Heap<JS::Value> *vp)
+{
+RemoveRoot(rt, (void *)vp);
+*vp = UndefinedValue();
+}
+JS_PUBLIC_API(void)
+JS::RemoveStringRootRT(JSRuntime *rt, JS::Heap<JSString *> *rp)
+{
+RemoveRoot(rt, (void *)rp);
+*rp = nullptr;
+}
+JS_PUBLIC_API(void)
+JS::RemoveObjectRootRT(JSRuntime *rt, JS::Heap<JSObject *> *rp)
+{
+RemoveRoot(rt, (void *)rp);
+*rp = nullptr;
+}
+JS_PUBLIC_API(void)
+JS::RemoveScriptRootRT(JSRuntime *rt, JS::Heap<JSScript *> *rp)
+{
+RemoveRoot(rt, (void *)rp);
+*rp = nullptr;
+}
+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;
+class DumpingTracer
+{
+public:
+DumpingTracer(JSRuntime *rt, JSTraceCallback callback)
+: base(rt, callback)
+{}
+JSTracer            base;
+VisitedSet          visited;
+bool                ok;
+void                *startThing;
+void                *thingToFind;
+void                *thingToIgnore;
+JSHeapDumpNode      *parentNode;
+JSHeapDumpNode      **lastNodep;
+char                buffer[200];
+};
+static void
+DumpNotify(JSTracer *trc, void **thingp, JSGCTraceKind kind)
+{
+JS_ASSERT(trc->callback == DumpNotify);
+DumpingTracer *dtrc = (DumpingTracer *)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 = dtrc->base.getTracingEdgeName(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(DumpingTracer *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;
+DumpingTracer dtrc(rt, DumpNotify);
+if (!dtrc.visited.init())
+return false;
+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;
+MOZ_ASSERT(rt->gcHighFrequencyHeapGrowthMax / 0.85 > 1.0);
+break;
+case JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MIN:
+rt->gcHighFrequencyHeapGrowthMin = value / 100.0;
+MOZ_ASSERT(rt->gcHighFrequencyHeapGrowthMin / 0.85 > 1.0);
+break;
+case JSGC_LOW_FREQUENCY_HEAP_GROWTH:
+rt->gcLowFrequencyHeapGrowth = value / 100.0;
+MOZ_ASSERT(rt->gcLowFrequencyHeapGrowth / 0.9 > 1.0);
+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},
+{JSGC_HIGH_FREQUENCY_HIGH_LIMIT, 500},
+{JSGC_HIGH_FREQUENCY_LOW_LIMIT, 100},
+{JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MAX, 300},
+{JSGC_HIGH_FREQUENCY_HEAP_GROWTH_MIN, 150},
+{JSGC_LOW_FREQUENCY_HEAP_GROWTH, 150},
+{JSGC_HIGH_FREQUENCY_TIME_LIMIT, 1500},
+{JSGC_HIGH_FREQUENCY_TIME_LIMIT, 1500},
+{JSGC_HIGH_FREQUENCY_TIME_LIMIT, 1500},
+{JSGC_ALLOCATION_THRESHOLD, 30},
+{JSGC_DECOMMIT_THRESHOLD, 32},
+{JSGC_MODE, JSGC_MODE_COMPARTMENT}
+};
+config = nominal;
+}
+for (size_t i = 0; i < NumGCConfigs; i++)
+JS_SetGCParameter(rt, config[i].key, config[i].value);
+}
+JS_PUBLIC_API(JSString *)
+JS_NewExternalString(JSContext *cx, const 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)
+{
+AssertHeapIsIdle(cx);
+CHECK_REQUEST(cx);
+assertSameCompartment(cx, proto);
+RootedValue cval(cx);
+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();
+}
+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(JSObject *obj)
+{
+return obj->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,
+MutableHandleObject objp, MutableHandleShape propp)
+{
+AssertHeapIsIdle(cx);
+CHECK_REQUEST(cx);
+assertSameCompartment(cx, obj, id);
+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))
+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, &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_HasPropertyById(JSContext *cx, HandleObject obj, HandleId id, bool *foundp)
+{
+RootedObject obj2(cx);
+RootedShape prop(cx);
+bool ok = LookupPropertyById(cx, obj, id, &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, &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);
+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, HandleObject obj, const char *name, HandleValue value,
+unsigned attrs,
+PropertyOp getter /* = nullptr */, JSStrictPropertyOp setter /* = nullptr */)
+{
+return DefineProperty(cx, obj, name, value, GetterWrapper(getter), SetterWrapper(setter),
+attrs, 0);
+}
+JS_PUBLIC_API(bool)
+JS_DefineProperty(JSContext *cx, HandleObject obj, const char *name, HandleObject valueArg,
+unsigned attrs,
+PropertyOp getter /* = nullptr */, JSStrictPropertyOp setter /* = nullptr */)
+{
+RootedValue value(cx, ObjectValue(*valueArg));
+return DefineProperty(cx, obj, name, value, GetterWrapper(getter), SetterWrapper(setter),
+attrs, 0);
+}
+JS_PUBLIC_API(bool)
+JS_DefineProperty(JSContext *cx, HandleObject obj, const char *name, HandleString valueArg,
+unsigned attrs,
+PropertyOp getter /* = nullptr */, JSStrictPropertyOp setter /* = nullptr */)
+{
+RootedValue value(cx, StringValue(valueArg));
+return DefineProperty(cx, obj, name, value, GetterWrapper(getter), SetterWrapper(setter),
+attrs, 0);
+}
+JS_PUBLIC_API(bool)
+JS_DefineProperty(JSContext *cx, HandleObject obj, const char *name, int32_t valueArg,
+unsigned attrs,
+PropertyOp getter /* = nullptr */, JSStrictPropertyOp setter /* = nullptr */)
+{
+Value value = Int32Value(valueArg);
+return DefineProperty(cx, obj, name, HandleValue::fromMarkedLocation(&value),
+GetterWrapper(getter), SetterWrapper(setter), attrs, 0);
+}
+JS_PUBLIC_API(bool)
+JS_DefineProperty(JSContext *cx, HandleObject obj, const char *name, uint32_t valueArg,
+unsigned attrs,
+PropertyOp getter /* = nullptr */, JSStrictPropertyOp setter /* = nullptr */)
+{
+Value value = UINT_TO_JSVAL(valueArg);
+return DefineProperty(cx, obj, name, HandleValue::fromMarkedLocation(&value),
+GetterWrapper(getter), SetterWrapper(setter), attrs, 0);
+}
+JS_PUBLIC_API(bool)
+JS_DefineProperty(JSContext *cx, HandleObject obj, const char *name, double valueArg,
+unsigned attrs,
+PropertyOp getter /* = nullptr */, JSStrictPropertyOp setter /* = nullptr */)
+{
+Value value = NumberValue(valueArg);
+return DefineProperty(cx, obj, name, HandleValue::fromMarkedLocation(&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,
+MutableHandle<PropertyDescriptor> desc)
+{
+RootedObject obj2(cx);
+RootedShape shape(cx);
+if (!LookupPropertyById(cx, obj, id, &obj2, &shape))
+return false;
+desc.clear();
+if (!shape)
+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>())
+return Proxy::getPropertyDescriptor(cx, obj2, id, desc);
+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,
+MutableHandle<JSPropertyDescriptor> desc)
+{
+AssertHeapIsIdle(cx);
+CHECK_REQUEST(cx);
+return GetOwnPropertyDescriptor(cx, obj, id, desc);
+}
+JS_PUBLIC_API(bool)
+JS_GetOwnPropertyDescriptor(JSContext *cx, HandleObject obj, const char *name,
+MutableHandle<JSPropertyDescriptor> desc)
+{
+JSAtom *atom = Atomize(cx, name, strlen(name));
+if (!atom)
+return false;
+RootedId id(cx, AtomToId(atom));
+return JS_GetOwnPropertyDescriptorById(cx, obj, id, desc);
+}
+JS_PUBLIC_API(bool)
+JS_GetPropertyDescriptorById(JSContext *cx, HandleObject obj, HandleId id,
+MutableHandle<JSPropertyDescriptor> desc)
+{
+return GetPropertyDescriptorById(cx, obj, id, desc);
+}
+JS_PUBLIC_API(bool)
+JS_GetPropertyDescriptor(JSContext *cx, HandleObject obj, const char *name,
+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, 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);
+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);
+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);
+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);
+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);
+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);
+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);
+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);
+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;
+forceAsync = rhs.forceAsync;
+installedFile = rhs.installedFile;
+sourceIsLazy = rhs.sourceIsLazy;
+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;
+}
+bool
+JS::Compile(JSContext *cx, HandleObject obj, const ReadOnlyCompileOptions &options,
+SourceBufferHolder &srcBuf, MutableHandleScript script)
+{
+JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
+AssertHeapIsIdle(cx);
+CHECK_REQUEST(cx);
+assertSameCompartment(cx, obj);
+AutoLastFrameCheck lfc(cx);
+script.set(frontend::CompileScript(cx, &cx->tempLifoAlloc(), obj, NullPtr(), options, srcBuf));
+return !!script;
+}
+JSScript *
+JS::Compile(JSContext *cx, HandleObject obj, const ReadOnlyCompileOptions &options,
+const jschar *chars, size_t length)
+{
+SourceBufferHolder srcBuf(chars, length, SourceBufferHolder::NoOwnership);
+RootedScript script(cx);
+if (!Compile(cx, obj, options, srcBuf, &script))
+return nullptr;
+return script;
+}
+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);
+return Compile(cx, obj, options, file.fp());
+}
+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, 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, callback, callbackData);
+}
+JS_PUBLIC_API(JSScript *)
+JS::FinishOffThreadScript(JSContext *maybecx, JSRuntime *rt, void *token)
+{
+#ifdef JS_THREADSAFE
+JS_ASSERT(CurrentThreadCanAccessRuntime(rt));
+if (maybecx) {
+RootedScript script(maybecx);
+{
+AutoLastFrameCheck lfc(maybecx);
+script = WorkerThreadState().finishParseTask(maybecx, rt, token);
+}
+return script;
+} else {
+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(bool)
+JS::CompileFunction(JSContext *cx, HandleObject obj, const ReadOnlyCompileOptions &options,
+const char *name, unsigned nargs, const char *const *argnames,
+SourceBufferHolder &srcBuf, MutableHandleFunction fun)
+{
+JS_ASSERT(!cx->runtime()->isAtomsCompartment(cx->compartment()));
+AssertHeapIsIdle(cx);
+CHECK_REQUEST(cx);
+assertSameCompartment(cx, obj);
+RootedAtom funAtom(cx);
+AutoLastFrameCheck lfc(cx);
+if (name) {
+funAtom = Atomize(cx, name, strlen(name));
+if (!funAtom)
+return false;
+}
+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 false;
+}
+fun.set(NewFunction(cx, NullPtr(), nullptr, 0, JSFunction::INTERPRETED, obj,
+funAtom, JSFunction::FinalizeKind, TenuredObject));
+if (!fun)
+return false;
+if (!frontend::CompileFunctionBody(cx, fun, options, formals, srcBuf))
+return false;
+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 false;
+}
+return true;
+}
+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)
+{
+RootedFunction fun(cx);
+SourceBufferHolder srcBuf(chars, length, SourceBufferHolder::NoOwnership);
+if (!JS::CompileFunction(cx, obj, options, name, nargs, argnames, srcBuf, &fun))
+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, scriptArg);
+AutoLastFrameCheck lfc(cx);
+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::CloneAndExecuteScript(JSContext *cx, HandleObject obj, HandleScript scriptArg)
+{
+CHECK_REQUEST(cx);
+assertSameCompartment(cx, obj);
+RootedScript script(cx, scriptArg);
+if (script->compartment() != cx->compartment()) {
+script = CloneScript(cx, NullPtr(), NullPtr(), script);
+if (!script)
+return false;
+}
+return ExecuteScript(cx, obj, script, 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,
+SourceBufferHolder &srcBuf, 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,
+srcBuf, 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 &optionsArg,
+const jschar *chars, size_t length, JS::Value *rval)
+{
+SourceBufferHolder srcBuf(chars, length, SourceBufferHolder::NoOwnership);
+return ::Evaluate(cx, obj, optionsArg, srcBuf, rval);
+}
+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;
+SourceBufferHolder srcBuf(chars, length, SourceBufferHolder::GiveOwnership);
+bool ok = ::Evaluate(cx, obj, options, srcBuf, rval);
+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,
+SourceBufferHolder &srcBuf, MutableHandleValue rval)
+{
+return ::Evaluate(cx, obj, optionsArg, srcBuf, rval.address());
+}
+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,
+SourceBufferHolder &srcBuf)
+{
+return ::Evaluate(cx, obj, optionsArg, srcBuf, nullptr);
+}
+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_EvaluateUCScript(JSContext *cx, HandleObject obj, SourceBufferHolder &srcBuf,
+const char *filename, unsigned lineno, MutableHandleValue rval)
+{
+CompileOptions options(cx);
+options.setFileAndLine(filename, lineno);
+return ::Evaluate(cx, obj, options, srcBuf, 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);
+}
+static JSObject *
+JS_NewHelper(JSContext *cx, HandleObject ctor, const JS::HandleValueArray& inputArgs)
+{
+AssertHeapIsIdle(cx);
+CHECK_REQUEST(cx);
+assertSameCompartment(cx, ctor, inputArgs);
+// 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(JSObject *)
+JS_New(JSContext *cx, HandleObject ctor, const JS::HandleValueArray& inputArgs)
+{
+RootedObject obj(cx);
+{
+AutoLastFrameCheck lfc(cx);
+obj = JS_NewHelper(cx, ctor, inputArgs);
+}
+return obj;
+}
+JS_PUBLIC_API(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(const char*)
+JS_GetDefaultLocale(JSRuntime *rt)
+{
+AssertHeapIsIdle(rt);
+return rt->getDefaultLocale();
+}
+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);
+RemoveRoot(cx->runtime(), &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;
+case JSJITCOMPILER_PARALLEL_COMPILATION_ENABLE:
+if (value == 1) {
+rt->setParallelIonCompilationEnabled(true);
+IonSpew(js::jit::IonSpew_Scripts, "Enable parallel compilation");
+} else if (value == 0) {
+rt->setParallelIonCompilationEnabled(false);
+IonSpew(js::jit::IonSpew_Scripts, "Disable parallel compilation");
+}
+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();
+case JSJITCOMPILER_PARALLEL_COMPILATION_ENABLE:
+return rt->canUseParallelIonCompilation();
+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 *originPrincipals)
+{
+XDRDecoder decoder(cx, data, length, 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 *originPrincipals)
+{
+XDRDecoder decoder(cx, data, length, 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;
+}

The Tor Browser / file comparison

comparison: js/src/jsapi.cpp

js/src/jsapi.cpp