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cobalt / cobalt / c73ce7d5dfce7ae20bcc30efc5f220e0fbac12b1 / . / src / third_party / mozjs-45 / js / src / builtin / TestingFunctions.cpp
blob: 9a1c6b8f4e30394ba50bb347f28058acd51f25c3 [file] [log] [blame]
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
* vim: set ts=8 sts=4 et sw=4 tw=99:
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "builtin/TestingFunctions.h"
#include "mozilla/Move.h"
#include "mozilla/UniquePtr.h"
#include "jsapi.h"
#include "jscntxt.h"
#include "jsfriendapi.h"
#include "jsgc.h"
#include "jsobj.h"
#include "jsprf.h"
#include "jswrapper.h"
#include "asmjs/AsmJSLink.h"
#include "asmjs/AsmJSValidate.h"
#include "jit/InlinableNatives.h"
#include "jit/JitFrameIterator.h"
#include "js/Debug.h"
#include "js/HashTable.h"
#include "js/StructuredClone.h"
#include "js/UbiNode.h"
#include "js/UbiNodeBreadthFirst.h"
#include "js/Vector.h"
#include "vm/GlobalObject.h"
#include "vm/Interpreter.h"
#include "vm/ProxyObject.h"
#include "vm/SavedStacks.h"
#include "vm/Stack.h"
#include "vm/TraceLogging.h"
#include "jscntxtinlines.h"
#include "jsobjinlines.h"
#include "vm/NativeObject-inl.h"
// Unified leak fix:
#include "vm/ScopeObject-inl.h"
using namespace js;
using mozilla::ArrayLength;
using mozilla::Move;
using mozilla::UniquePtr;
// If fuzzingSafe is set, remove functionality that could cause problems with
// fuzzers. Set this via the environment variable MOZ_FUZZING_SAFE.
static bool fuzzingSafe = false;
// If disableOOMFunctions is set, disable functionality that causes artificial
// OOM conditions.
static bool disableOOMFunctions = false;
static bool
EnvVarIsDefined(const char* name)
{
const char* value = js_sb_getenv(name);
return value && *value;
}
#if defined(DEBUG) || defined(JS_OOM_BREAKPOINT)
static bool
EnvVarAsInt(const char* name, int* valueOut)
{
if (!EnvVarIsDefined(name))
return false;
*valueOut = atoi(js_sb_getenv(name));
return true;
}
#endif
static bool
GetBuildConfiguration(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
RootedObject info(cx, JS_NewPlainObject(cx));
if (!info)
return false;
if (!JS_SetProperty(cx, info, "rooting-analysis", FalseHandleValue))
return false;
if (!JS_SetProperty(cx, info, "exact-rooting", TrueHandleValue))
return false;
if (!JS_SetProperty(cx, info, "trace-jscalls-api", FalseHandleValue))
return false;
if (!JS_SetProperty(cx, info, "incremental-gc", TrueHandleValue))
return false;
if (!JS_SetProperty(cx, info, "generational-gc", TrueHandleValue))
return false;
RootedValue value(cx);
#ifdef DEBUG
value = BooleanValue(true);
#else
value = BooleanValue(false);
#endif
if (!JS_SetProperty(cx, info, "debug", value))
return false;
#ifdef RELEASE_BUILD
value = BooleanValue(true);
#else
value = BooleanValue(false);
#endif
if (!JS_SetProperty(cx, info, "release", value))
return false;
#ifdef JS_HAS_CTYPES
value = BooleanValue(true);
#else
value = BooleanValue(false);
#endif
if (!JS_SetProperty(cx, info, "has-ctypes", value))
return false;
#ifdef JS_CPU_X86
value = BooleanValue(true);
#else
value = BooleanValue(false);
#endif
if (!JS_SetProperty(cx, info, "x86", value))
return false;
#ifdef JS_CPU_X64
value = BooleanValue(true);
#else
value = BooleanValue(false);
#endif
if (!JS_SetProperty(cx, info, "x64", value))
return false;
#ifdef JS_SIMULATOR_ARM
value = BooleanValue(true);
#else
value = BooleanValue(false);
#endif
if (!JS_SetProperty(cx, info, "arm-simulator", value))
return false;
#ifdef JS_SIMULATOR_ARM64
value = BooleanValue(true);
#else
value = BooleanValue(false);
#endif
if (!JS_SetProperty(cx, info, "arm64-simulator", value))
return false;
#ifdef MOZ_ASAN
value = BooleanValue(true);
#else
value = BooleanValue(false);
#endif
if (!JS_SetProperty(cx, info, "asan", value))
return false;
#ifdef MOZ_TSAN
value = BooleanValue(true);
#else
value = BooleanValue(false);
#endif
if (!JS_SetProperty(cx, info, "tsan", value))
return false;
if (cobalt::configuration::Configuration::GetInstance()->CobaltGcZeal()) {
value = BooleanValue(true);
} else {
value = BooleanValue(false);
}
if (!JS_SetProperty(cx, info, "has-gczeal", value))
return false;
#ifdef JS_MORE_DETERMINISTIC
value = BooleanValue(true);
#else
value = BooleanValue(false);
#endif
if (!JS_SetProperty(cx, info, "more-deterministic", value))
return false;
#ifdef MOZ_PROFILING
value = BooleanValue(true);
#else
value = BooleanValue(false);
#endif
if (!JS_SetProperty(cx, info, "profiling", value))
return false;
#ifdef INCLUDE_MOZILLA_DTRACE
value = BooleanValue(true);
#else
value = BooleanValue(false);
#endif
if (!JS_SetProperty(cx, info, "dtrace", value))
return false;
#ifdef MOZ_VALGRIND
value = BooleanValue(true);
#else
value = BooleanValue(false);
#endif
if (!JS_SetProperty(cx, info, "valgrind", value))
return false;
#ifdef JS_OOM_DO_BACKTRACES
value = BooleanValue(true);
#else
value = BooleanValue(false);
#endif
if (!JS_SetProperty(cx, info, "oom-backtraces", value))
return false;
#ifdef ENABLE_BINARYDATA
value = BooleanValue(true);
#else
value = BooleanValue(false);
#endif
if (!JS_SetProperty(cx, info, "binary-data", value))
return false;
#ifdef EXPOSE_INTL_API
value = BooleanValue(true);
#else
value = BooleanValue(false);
#endif
if (!JS_SetProperty(cx, info, "intl-api", value))
return false;
#if defined(XP_WIN)
value = BooleanValue(false);
#elif defined(SOLARIS)
value = BooleanValue(false);
#elif defined(XP_UNIX)
value = BooleanValue(true);
#else
value = BooleanValue(false);
#endif
if (!JS_SetProperty(cx, info, "mapped-array-buffer", value))
return false;
#ifdef MOZ_MEMORY
value = BooleanValue(true);
#else
value = BooleanValue(false);
#endif
if (!JS_SetProperty(cx, info, "moz-memory", value))
return false;
value.setInt32(sizeof(void*));
if (!JS_SetProperty(cx, info, "pointer-byte-size", value))
return false;
args.rval().setObject(*info);
return true;
}
static bool
GC(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
/*
* If the first argument is 'compartment', we collect any compartments
* previously scheduled for GC via schedulegc. If the first argument is an
* object, we collect the object's compartment (and any other compartments
* scheduled for GC). Otherwise, we collect all compartments.
*/
bool compartment = false;
if (args.length() >= 1) {
Value arg = args[0];
if (arg.isString()) {
if (!JS_StringEqualsAscii(cx, arg.toString(), "compartment", &compartment))
return false;
} else if (arg.isObject()) {
PrepareZoneForGC(UncheckedUnwrap(&arg.toObject())->zone());
compartment = true;
}
}
bool shrinking = false;
if (args.length() >= 2) {
Value arg = args[1];
if (arg.isString()) {
if (!JS_StringEqualsAscii(cx, arg.toString(), "shrinking", &shrinking))
return false;
}
}
#ifndef JS_MORE_DETERMINISTIC
size_t preBytes = cx->runtime()->gc.usage.gcBytes();
#endif
if (compartment)
PrepareForDebugGC(cx->runtime());
else
JS::PrepareForFullGC(cx->runtime());
JSGCInvocationKind gckind = shrinking ? GC_SHRINK : GC_NORMAL;
JS::GCForReason(cx->runtime(), gckind, JS::gcreason::API);
char buf[256] = { '\0' };
#ifndef JS_MORE_DETERMINISTIC
JS_snprintf(buf, sizeof(buf), "before %lu, after %lu\n",
(unsigned long)preBytes, (unsigned long)cx->runtime()->gc.usage.gcBytes());
#endif
JSString* str = JS_NewStringCopyZ(cx, buf);
if (!str)
return false;
args.rval().setString(str);
return true;
}
static bool
MinorGC(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.get(0) == BooleanValue(true))
cx->runtime()->gc.storeBuffer.setAboutToOverflow();
cx->minorGC(JS::gcreason::API);
args.rval().setUndefined();
return true;
}
static const struct ParamPair {
const char* name;
JSGCParamKey param;
} paramMap[] = {
{"maxBytes", JSGC_MAX_BYTES },
{"maxMallocBytes", JSGC_MAX_MALLOC_BYTES},
{"gcBytes", JSGC_BYTES},
{"gcNumber", JSGC_NUMBER},
{"sliceTimeBudget", JSGC_SLICE_TIME_BUDGET},
{"markStackLimit", JSGC_MARK_STACK_LIMIT},
{"minEmptyChunkCount", JSGC_MIN_EMPTY_CHUNK_COUNT},
{"maxEmptyChunkCount", JSGC_MAX_EMPTY_CHUNK_COUNT}
};
// Keep this in sync with above params.
#define GC_PARAMETER_ARGS_LIST "maxBytes, maxMallocBytes, gcBytes, gcNumber, sliceTimeBudget, markStackLimit, minEmptyChunkCount or maxEmptyChunkCount"
static bool
GCParameter(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
JSString* str = ToString(cx, args.get(0));
if (!str)
return false;
JSFlatString* flatStr = JS_FlattenString(cx, str);
if (!flatStr)
return false;
size_t paramIndex = 0;
for (;; paramIndex++) {
if (paramIndex == ArrayLength(paramMap)) {
JS_ReportError(cx,
"the first argument must be one of " GC_PARAMETER_ARGS_LIST);
return false;
}
if (JS_FlatStringEqualsAscii(flatStr, paramMap[paramIndex].name))
break;
}
JSGCParamKey param = paramMap[paramIndex].param;
// Request mode.
if (args.length() == 1) {
uint32_t value = JS_GetGCParameter(cx->runtime(), param);
args.rval().setNumber(value);
return true;
}
if (param == JSGC_NUMBER || param == JSGC_BYTES) {
JS_ReportError(cx, "Attempt to change read-only parameter %s",
paramMap[paramIndex].name);
return false;
}
if (disableOOMFunctions && (param == JSGC_MAX_BYTES || param == JSGC_MAX_MALLOC_BYTES)) {
args.rval().setUndefined();
return true;
}
uint32_t value;
if (!ToUint32(cx, args[1], &value))
return false;
if (!value) {
JS_ReportError(cx, "the second argument must be convertable to uint32_t "
"with non-zero value");
return false;
}
if (param == JSGC_MARK_STACK_LIMIT && JS::IsIncrementalGCInProgress(cx->runtime())) {
JS_ReportError(cx, "attempt to set markStackLimit while a GC is in progress");
return false;
}
if (param == JSGC_MAX_BYTES) {
uint32_t gcBytes = JS_GetGCParameter(cx->runtime(), JSGC_BYTES);
if (value < gcBytes) {
JS_ReportError(cx,
"attempt to set maxBytes to the value less than the current "
"gcBytes (%u)",
gcBytes);
return false;
}
}
JS_SetGCParameter(cx->runtime(), param, value);
args.rval().setUndefined();
return true;
}
static void
SetAllowRelazification(JSContext* cx, bool allow)
{
JSRuntime* rt = cx->runtime();
MOZ_ASSERT(rt->allowRelazificationForTesting != allow);
rt->allowRelazificationForTesting = allow;
for (AllFramesIter i(cx); !i.done(); ++i)
i.script()->setDoNotRelazify(allow);
}
static bool
RelazifyFunctions(JSContext* cx, unsigned argc, Value* vp)
{
// Relazifying functions on GC is usually only done for compartments that are
// not active. To aid fuzzing, this testing function allows us to relazify
// even if the compartment is active.
SetAllowRelazification(cx, true);
bool res = GC(cx, argc, vp);
SetAllowRelazification(cx, false);
return res;
}
static bool
IsProxy(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 1) {
JS_ReportError(cx, "the function takes exactly one argument");
return false;
}
if (!args[0].isObject()) {
args.rval().setBoolean(false);
return true;
}
args.rval().setBoolean(args[0].toObject().is<ProxyObject>());
return true;
}
static bool
IsLazyFunction(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 1) {
JS_ReportError(cx, "The function takes exactly one argument.");
return false;
}
if (!args[0].isObject() || !args[0].toObject().is<JSFunction>()) {
JS_ReportError(cx, "The first argument should be a function.");
return false;
}
args.rval().setBoolean(args[0].toObject().as<JSFunction>().isInterpretedLazy());
return true;
}
static bool
IsRelazifiableFunction(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 1) {
JS_ReportError(cx, "The function takes exactly one argument.");
return false;
}
if (!args[0].isObject() ||
!args[0].toObject().is<JSFunction>())
{
JS_ReportError(cx, "The first argument should be a function.");
return true;
}
JSFunction* fun = &args[0].toObject().as<JSFunction>();
args.rval().setBoolean(fun->hasScript() && fun->nonLazyScript()->isRelazifiable());
return true;
}
static bool
InternalConst(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() == 0) {
JS_ReportError(cx, "the function takes exactly one argument");
return false;
}
JSString* str = ToString(cx, args[0]);
if (!str)
return false;
JSFlatString* flat = JS_FlattenString(cx, str);
if (!flat)
return false;
if (JS_FlatStringEqualsAscii(flat, "INCREMENTAL_MARK_STACK_BASE_CAPACITY")) {
args.rval().setNumber(uint32_t(js::INCREMENTAL_MARK_STACK_BASE_CAPACITY));
} else {
JS_ReportError(cx, "unknown const name");
return false;
}
return true;
}
static bool
GCPreserveCode(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 0) {
RootedObject callee(cx, &args.callee());
ReportUsageError(cx, callee, "Wrong number of arguments");
return false;
}
cx->runtime()->gc.setAlwaysPreserveCode();
args.rval().setUndefined();
return true;
}
static bool
GCZeal(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() > 2) {
RootedObject callee(cx, &args.callee());
ReportUsageError(cx, callee, "Too many arguments");
return false;
}
uint32_t zeal;
if (!ToUint32(cx, args.get(0), &zeal))
return false;
uint32_t frequency = JS_DEFAULT_ZEAL_FREQ;
if (args.length() >= 2) {
if (!ToUint32(cx, args.get(1), &frequency))
return false;
}
JS_SetGCZeal(cx, (uint8_t)zeal, frequency);
args.rval().setUndefined();
return true;
}
static bool
ScheduleGC(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() > 1) {
RootedObject callee(cx, &args.callee());
ReportUsageError(cx, callee, "Too many arguments");
return false;
}
if (args.length() == 0) {
/* Fetch next zeal trigger only. */
} else if (args[0].isInt32()) {
/* Schedule a GC to happen after |arg| allocations. */
JS_ScheduleGC(cx, args[0].toInt32());
} else if (args[0].isObject()) {
/* Ensure that |zone| is collected during the next GC. */
Zone* zone = UncheckedUnwrap(&args[0].toObject())->zone();
PrepareZoneForGC(zone);
} else if (args[0].isString()) {
/* This allows us to schedule atomsCompartment for GC. */
PrepareZoneForGC(args[0].toString()->zone());
}
uint8_t zeal;
uint32_t freq;
uint32_t next;
JS_GetGCZeal(cx, &zeal, &freq, &next);
args.rval().setInt32(next);
return true;
}
static bool
SelectForGC(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
/*
* The selectedForMarking set is intended to be manually marked at slice
* start to detect missing pre-barriers. It is invalid for nursery things
* to be in the set, so evict the nursery before adding items.
*/
JSRuntime* rt = cx->runtime();
rt->gc.evictNursery();
for (unsigned i = 0; i < args.length(); i++) {
if (args[i].isObject()) {
if (!rt->gc.selectForMarking(&args[i].toObject()))
return false;
}
}
args.rval().setUndefined();
return true;
}
static bool
VerifyPreBarriers(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() > 0) {
RootedObject callee(cx, &args.callee());
ReportUsageError(cx, callee, "Too many arguments");
return false;
}
gc::VerifyBarriers(cx->runtime(), gc::PreBarrierVerifier);
args.rval().setUndefined();
return true;
}
static bool
VerifyPostBarriers(JSContext* cx, unsigned argc, Value* vp)
{
// This is a no-op since the post barrier verifier was removed.
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length()) {
RootedObject callee(cx, &args.callee());
ReportUsageError(cx, callee, "Too many arguments");
return false;
}
args.rval().setUndefined();
return true;
}
static bool
GCState(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 0) {
RootedObject callee(cx, &args.callee());
ReportUsageError(cx, callee, "Too many arguments");
return false;
}
const char* state;
gc::State globalState = cx->runtime()->gc.state();
if (globalState == gc::NO_INCREMENTAL)
state = "none";
else if (globalState == gc::MARK)
state = "mark";
else if (globalState == gc::SWEEP)
state = "sweep";
else if (globalState == gc::COMPACT)
state = "compact";
else
MOZ_CRASH("Unobserveable global GC state");
JSString* str = JS_NewStringCopyZ(cx, state);
if (!str)
return false;
args.rval().setString(str);
return true;
}
static bool
DeterministicGC(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 1) {
RootedObject callee(cx, &args.callee());
ReportUsageError(cx, callee, "Wrong number of arguments");
return false;
}
cx->runtime()->gc.setDeterministic(ToBoolean(args[0]));
args.rval().setUndefined();
return true;
}
static bool
StartGC(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() > 2) {
RootedObject callee(cx, &args.callee());
ReportUsageError(cx, callee, "Wrong number of arguments");
return false;
}
auto budget = SliceBudget::unlimited();
if (args.length() >= 1) {
uint32_t work = 0;
if (!ToUint32(cx, args[0], &work))
return false;
budget = SliceBudget(WorkBudget(work));
}
bool shrinking = false;
if (args.length() >= 2) {
Value arg = args[1];
if (arg.isString()) {
if (!JS_StringEqualsAscii(cx, arg.toString(), "shrinking", &shrinking))
return false;
}
}
JSRuntime* rt = cx->runtime();
if (rt->gc.isIncrementalGCInProgress()) {
RootedObject callee(cx, &args.callee());
JS_ReportError(cx, "Incremental GC already in progress");
return false;
}
JSGCInvocationKind gckind = shrinking ? GC_SHRINK : GC_NORMAL;
rt->gc.startDebugGC(gckind, budget);
args.rval().setUndefined();
return true;
}
static bool
GCSlice(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() > 1) {
RootedObject callee(cx, &args.callee());
ReportUsageError(cx, callee, "Wrong number of arguments");
return false;
}
auto budget = SliceBudget::unlimited();
if (args.length() == 1) {
uint32_t work = 0;
if (!ToUint32(cx, args[0], &work))
return false;
budget = SliceBudget(WorkBudget(work));
}
JSRuntime* rt = cx->runtime();
if (!rt->gc.isIncrementalGCInProgress())
rt->gc.startDebugGC(GC_NORMAL, budget);
else
rt->gc.debugGCSlice(budget);
args.rval().setUndefined();
return true;
}
static bool
AbortGC(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 0) {
RootedObject callee(cx, &args.callee());
ReportUsageError(cx, callee, "Wrong number of arguments");
return false;
}
cx->runtime()->gc.abortGC();
args.rval().setUndefined();
return true;
}
static bool
ValidateGC(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 1) {
RootedObject callee(cx, &args.callee());
ReportUsageError(cx, callee, "Wrong number of arguments");
return false;
}
cx->runtime()->gc.setValidate(ToBoolean(args[0]));
args.rval().setUndefined();
return true;
}
static bool
FullCompartmentChecks(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 1) {
RootedObject callee(cx, &args.callee());
ReportUsageError(cx, callee, "Wrong number of arguments");
return false;
}
cx->runtime()->gc.setFullCompartmentChecks(ToBoolean(args[0]));
args.rval().setUndefined();
return true;
}
static bool
NondeterministicGetWeakMapKeys(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 1) {
RootedObject callee(cx, &args.callee());
ReportUsageError(cx, callee, "Wrong number of arguments");
return false;
}
if (!args[0].isObject()) {
JS_ReportErrorNumber(cx, GetErrorMessage, nullptr, JSMSG_NOT_EXPECTED_TYPE,
"nondeterministicGetWeakMapKeys", "WeakMap",
InformalValueTypeName(args[0]));
return false;
}
RootedObject arr(cx);
RootedObject mapObj(cx, &args[0].toObject());
if (!JS_NondeterministicGetWeakMapKeys(cx, mapObj, &arr))
return false;
if (!arr) {
JS_ReportErrorNumber(cx, GetErrorMessage, nullptr, JSMSG_NOT_EXPECTED_TYPE,
"nondeterministicGetWeakMapKeys", "WeakMap",
args[0].toObject().getClass()->name);
return false;
}
args.rval().setObject(*arr);
return true;
}
class HasChildTracer : public JS::CallbackTracer
{
RootedValue child_;
bool found_;
void onChild(const JS::GCCellPtr& thing) override {
if (thing.asCell() == child_.toGCThing())
found_ = true;
}
public:
HasChildTracer(JSRuntime* rt, HandleValue child)
: JS::CallbackTracer(rt, TraceWeakMapKeysValues), child_(rt, child), found_(false)
{}
bool found() const { return found_; }
};
static bool
HasChild(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
RootedValue parent(cx, args.get(0));
RootedValue child(cx, args.get(1));
if (!parent.isMarkable() || !child.isMarkable()) {
args.rval().setBoolean(false);
return true;
}
HasChildTracer trc(cx->runtime(), child);
TraceChildren(&trc, parent.toGCThing(), parent.traceKind());
args.rval().setBoolean(trc.found());
return true;
}
static bool
SetSavedStacksRNGState(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (!args.requireAtLeast(cx, "setSavedStacksRNGState", 1))
return false;
int32_t seed;
if (!ToInt32(cx, args[0], &seed))
return false;
// Either one or the other of the seed arguments must be non-zero;
// make this true no matter what value 'seed' has.
cx->compartment()->savedStacks().setRNGState(seed, (seed + 1) * 33);
return true;
}
static bool
GetSavedFrameCount(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
args.rval().setNumber(cx->compartment()->savedStacks().count());
return true;
}
static bool
SaveStack(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
unsigned maxFrameCount = 0;
if (args.length() >= 1) {
double d;
if (!ToNumber(cx, args[0], &d))
return false;
if (d < 0) {
ReportValueErrorFlags(cx, JSREPORT_ERROR, JSMSG_UNEXPECTED_TYPE,
JSDVG_SEARCH_STACK, args[0], nullptr,
"not a valid maximum frame count", NULL);
return false;
}
maxFrameCount = d;
}
JSCompartment* targetCompartment = cx->compartment();
if (args.length() >= 2) {
if (!args[1].isObject()) {
ReportValueErrorFlags(cx, JSREPORT_ERROR, JSMSG_UNEXPECTED_TYPE,
JSDVG_SEARCH_STACK, args[0], nullptr,
"not an object", NULL);
return false;
}
RootedObject obj(cx, UncheckedUnwrap(&args[1].toObject()));
if (!obj)
return false;
targetCompartment = obj->compartment();
}
RootedObject stack(cx);
{
AutoCompartment ac(cx, targetCompartment);
if (!JS::CaptureCurrentStack(cx, &stack, maxFrameCount))
return false;
}
if (stack && !cx->compartment()->wrap(cx, &stack))
return false;
args.rval().setObjectOrNull(stack);
return true;
}
static bool
CallFunctionFromNativeFrame(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 1) {
JS_ReportError(cx, "The function takes exactly one argument.");
return false;
}
if (!args[0].isObject() || !IsCallable(args[0])) {
JS_ReportError(cx, "The first argument should be a function.");
return false;
}
RootedObject function(cx, &args[0].toObject());
return Call(cx, UndefinedHandleValue, function,
JS::HandleValueArray::empty(), args.rval());
}
static bool
CallFunctionWithAsyncStack(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 3) {
JS_ReportError(cx, "The function takes exactly three arguments.");
return false;
}
if (!args[0].isObject() || !IsCallable(args[0])) {
JS_ReportError(cx, "The first argument should be a function.");
return false;
}
if (!args[1].isObject() || !args[1].toObject().is<SavedFrame>()) {
JS_ReportError(cx, "The second argument should be a SavedFrame.");
return false;
}
if (!args[2].isString() || args[2].toString()->empty()) {
JS_ReportError(cx, "The third argument should be a non-empty string.");
return false;
}
RootedObject function(cx, &args[0].toObject());
RootedObject stack(cx, &args[1].toObject());
RootedString asyncCause(cx, args[2].toString());
JS::AutoSetAsyncStackForNewCalls sas(cx, stack, asyncCause,
JS::AutoSetAsyncStackForNewCalls::AsyncCallKind::EXPLICIT);
return Call(cx, UndefinedHandleValue, function,
JS::HandleValueArray::empty(), args.rval());
}
static bool
EnableTrackAllocations(JSContext* cx, unsigned argc, Value* vp)
{
SetObjectMetadataCallback(cx, SavedStacksMetadataCallback);
return true;
}
static bool
DisableTrackAllocations(JSContext* cx, unsigned argc, Value* vp)
{
SetObjectMetadataCallback(cx, nullptr);
return true;
}
#if defined(DEBUG) || defined(JS_OOM_BREAKPOINT)
static bool
OOMThreadTypes(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
args.rval().setInt32(js::oom::THREAD_TYPE_MAX);
return true;
}
static bool
SetupOOMFailure(JSContext* cx, bool failAlways, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (disableOOMFunctions) {
args.rval().setUndefined();
return true;
}
if (args.length() < 1) {
JS_ReportError(cx, "Count argument required");
return false;
}
if (args.length() > 2) {
JS_ReportError(cx, "Too many arguments");
return false;
}
int32_t count;
if (!JS::ToInt32(cx, args.get(0), &count))
return false;
if (count <= 0) {
JS_ReportError(cx, "OOM cutoff should be positive");
return false;
}
uint32_t targetThread = js::oom::THREAD_TYPE_MAIN;
if (args.length() > 1 && !ToUint32(cx, args[1], &targetThread))
return false;
if (targetThread == js::oom::THREAD_TYPE_NONE || targetThread >= js::oom::THREAD_TYPE_MAX) {
JS_ReportError(cx, "Invalid thread type specified");
return false;
}
HelperThreadState().waitForAllThreads();
js::oom::targetThread = targetThread;
if (uint64_t(OOM_counter) + count >= UINT32_MAX) {
JS_ReportError(cx, "OOM cutoff out of range");
return false;
}
OOM_maxAllocations = OOM_counter + count;
OOM_failAlways = failAlways;
args.rval().setUndefined();
return true;
}
static bool
OOMAfterAllocations(JSContext* cx, unsigned argc, Value* vp)
{
return SetupOOMFailure(cx, true, argc, vp);
}
static bool
OOMAtAllocation(JSContext* cx, unsigned argc, Value* vp)
{
return SetupOOMFailure(cx, false, argc, vp);
}
static bool
ResetOOMFailure(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
args.rval().setBoolean(OOM_counter >= OOM_maxAllocations);
js::oom::targetThread = js::oom::THREAD_TYPE_NONE;
OOM_maxAllocations = UINT32_MAX;
return true;
}
static bool
OOMTest(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 1 || !args[0].isObject() || !args[0].toObject().is<JSFunction>()) {
JS_ReportError(cx, "oomTest() takes a single function argument.");
return false;
}
if (disableOOMFunctions) {
args.rval().setUndefined();
return true;
}
MOZ_ASSERT(!cx->isExceptionPending());
cx->runtime()->hadOutOfMemory = false;
RootedFunction function(cx, &args[0].toObject().as<JSFunction>());
bool verbose = EnvVarIsDefined("OOM_VERBOSE");
unsigned threadStart = oom::THREAD_TYPE_MAIN;
unsigned threadEnd = oom::THREAD_TYPE_MAX;
// Test a single thread type if specified by the OOM_THREAD environment variable.
int threadOption = 0;
if (EnvVarAsInt("OOM_THREAD", &threadOption)) {
if (threadOption < oom::THREAD_TYPE_MAIN || threadOption > oom::THREAD_TYPE_MAX) {
JS_ReportError(cx, "OOM_THREAD value out of range.");
return false;
}
threadStart = threadOption;
threadEnd = threadOption + 1;
}
if (cobalt::configuration::Configuration::GetInstance()->CobaltGcZeal()) {
JS_SetGCZeal(cx, 0, JS_DEFAULT_ZEAL_FREQ);
}
for (unsigned thread = threadStart; thread < threadEnd; thread++) {
if (verbose)
fprintf(stderr, "thread %d\n", thread);
HelperThreadState().waitForAllThreads();
js::oom::targetThread = thread;
unsigned allocation = 1;
bool handledOOM;
do {
if (verbose)
fprintf(stderr, " allocation %d\n", allocation);
MOZ_ASSERT(!cx->isExceptionPending());
MOZ_ASSERT(!cx->runtime()->hadOutOfMemory);
OOM_maxAllocations = OOM_counter + allocation;
OOM_failAlways = false;
RootedValue result(cx);
bool ok = JS_CallFunction(cx, cx->global(), function,
HandleValueArray::empty(), &result);
handledOOM = OOM_counter >= OOM_maxAllocations;
OOM_maxAllocations = UINT32_MAX;
MOZ_ASSERT_IF(ok, !cx->isExceptionPending());
// Note that it is possible that the function throws an exception
// unconnected to OOM, in which case we ignore it. More correct
// would be to have the caller pass some kind of exception
// specification and to check the exception against it.
cx->clearPendingException();
cx->runtime()->hadOutOfMemory = false;
allocation++;
} while (handledOOM);
if (verbose) {
fprintf(stderr, " finished after %d allocations\n", allocation - 2);
}
}
js::oom::targetThread = js::oom::THREAD_TYPE_NONE;
args.rval().setUndefined();
return true;
}
#endif
static const js::Class FakePromiseClass = {
"Promise", JSCLASS_IS_ANONYMOUS
};
static bool
MakeFakePromise(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
RootedObject obj(cx, NewObjectWithGivenProto(cx, &FakePromiseClass, nullptr));
if (!obj)
return false;
JS::dbg::onNewPromise(cx, obj);
args.rval().setObject(*obj);
return true;
}
static bool
SettleFakePromise(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (!args.requireAtLeast(cx, "settleFakePromise", 1))
return false;
if (!args[0].isObject() || args[0].toObject().getClass() != &FakePromiseClass) {
JS_ReportError(cx, "first argument must be a (fake) Promise object");
return false;
}
RootedObject promise(cx, &args[0].toObject());
JS::dbg::onPromiseSettled(cx, promise);
return true;
}
static unsigned finalizeCount = 0;
static void
finalize_counter_finalize(JSFreeOp* fop, JSObject* obj)
{
++finalizeCount;
}
static const JSClass FinalizeCounterClass = {
"FinalizeCounter", JSCLASS_IS_ANONYMOUS,
nullptr, /* addProperty */
nullptr, /* delProperty */
nullptr, /* getProperty */
nullptr, /* setProperty */
nullptr, /* enumerate */
nullptr, /* resolve */
nullptr, /* mayResolve */
finalize_counter_finalize
};
static bool
MakeFinalizeObserver(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
JSObject* obj = JS_NewObjectWithGivenProto(cx, &FinalizeCounterClass, nullptr);
if (!obj)
return false;
args.rval().setObject(*obj);
return true;
}
static bool
FinalizeCount(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
args.rval().setInt32(finalizeCount);
return true;
}
static bool
DumpHeap(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
DumpHeapNurseryBehaviour nurseryBehaviour = js::IgnoreNurseryObjects;
FILE* dumpFile = nullptr;
unsigned i = 0;
if (args.length() > i) {
Value v = args[i];
if (v.isString()) {
JSString* str = v.toString();
bool same = false;
if (!JS_StringEqualsAscii(cx, str, "collectNurseryBeforeDump", &same))
return false;
if (same) {
nurseryBehaviour = js::CollectNurseryBeforeDump;
++i;
}
}
}
if (args.length() > i) {
Value v = args[i];
if (v.isString()) {
if (!fuzzingSafe) {
JSString* str = v.toString();
JSAutoByteString fileNameBytes;
if (!fileNameBytes.encodeLatin1(cx, str))
return false;
const char* fileName = fileNameBytes.ptr();
dumpFile = fopen(fileName, "w");
if (!dumpFile) {
JS_ReportError(cx, "can't open %s", fileName);
return false;
}
}
++i;
}
}
if (i != args.length()) {
JS_ReportError(cx, "bad arguments passed to dumpHeap");
if (dumpFile)
fclose(dumpFile);
return false;
}
js::DumpHeap(JS_GetRuntime(cx), dumpFile ? dumpFile : stdout, nurseryBehaviour);
if (dumpFile)
fclose(dumpFile);
args.rval().setUndefined();
return true;
}
static bool
Terminate(JSContext* cx, unsigned arg, Value* vp)
{
#ifdef JS_MORE_DETERMINISTIC
// Print a message to stderr in more-deterministic builds to help jsfunfuzz
// find uncatchable-exception bugs.
fprintf(stderr, "terminate called\n");
#endif
JS_ClearPendingException(cx);
return false;
}
#define SPS_PROFILING_STACK_MAX_SIZE 1000
static ProfileEntry SPS_PROFILING_STACK[SPS_PROFILING_STACK_MAX_SIZE];
static uint32_t SPS_PROFILING_STACK_SIZE = 0;
static bool
EnableSPSProfiling(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
// Disable before re-enabling; see the assertion in |SPSProfiler::setProfilingStack|.
if (cx->runtime()->spsProfiler.installed())
cx->runtime()->spsProfiler.enable(false);
SetRuntimeProfilingStack(cx->runtime(), SPS_PROFILING_STACK, &SPS_PROFILING_STACK_SIZE,
SPS_PROFILING_STACK_MAX_SIZE);
cx->runtime()->spsProfiler.enableSlowAssertions(false);
cx->runtime()->spsProfiler.enable(true);
args.rval().setUndefined();
return true;
}
static bool
EnableSPSProfilingWithSlowAssertions(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
args.rval().setUndefined();
if (cx->runtime()->spsProfiler.enabled()) {
// If profiling already enabled with slow assertions disabled,
// this is a no-op.
if (cx->runtime()->spsProfiler.slowAssertionsEnabled())
return true;
// Slow assertions are off. Disable profiling before re-enabling
// with slow assertions on.
cx->runtime()->spsProfiler.enable(false);
}
// Disable before re-enabling; see the assertion in |SPSProfiler::setProfilingStack|.
if (cx->runtime()->spsProfiler.installed())
cx->runtime()->spsProfiler.enable(false);
SetRuntimeProfilingStack(cx->runtime(), SPS_PROFILING_STACK, &SPS_PROFILING_STACK_SIZE,
SPS_PROFILING_STACK_MAX_SIZE);
cx->runtime()->spsProfiler.enableSlowAssertions(true);
cx->runtime()->spsProfiler.enable(true);
return true;
}
static bool
DisableSPSProfiling(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (cx->runtime()->spsProfiler.installed())
cx->runtime()->spsProfiler.enable(false);
args.rval().setUndefined();
return true;
}
static bool
ReadSPSProfilingStack(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
args.rval().setUndefined();
// Return boolean 'false' if profiler is not enabled.
if (!cx->runtime()->spsProfiler.enabled()) {
args.rval().setBoolean(false);
return true;
}
// Array holding physical jit stack frames.
RootedObject stack(cx, NewDenseEmptyArray(cx));
if (!stack)
return false;
RootedObject inlineStack(cx);
RootedObject inlineFrameInfo(cx);
RootedString frameKind(cx);
RootedString frameLabel(cx);
RootedId idx(cx);
JS::ProfilingFrameIterator::RegisterState state;
uint32_t physicalFrameNo = 0;
const unsigned propAttrs = JSPROP_ENUMERATE;
for (JS::ProfilingFrameIterator i(cx->runtime(), state); !i.done(); ++i, ++physicalFrameNo) {
MOZ_ASSERT(i.stackAddress() != nullptr);
// Array holding all inline frames in a single physical jit stack frame.
inlineStack = NewDenseEmptyArray(cx);
if (!inlineStack)
return false;
JS::ProfilingFrameIterator::Frame frames[16];
uint32_t nframes = i.extractStack(frames, 0, 16);
for (uint32_t inlineFrameNo = 0; inlineFrameNo < nframes; inlineFrameNo++) {
// Object holding frame info.
inlineFrameInfo = NewBuiltinClassInstance<PlainObject>(cx);
if (!inlineFrameInfo)
return false;
const char* frameKindStr = nullptr;
switch (frames[inlineFrameNo].kind) {
case JS::ProfilingFrameIterator::Frame_Baseline:
frameKindStr = "baseline";
break;
case JS::ProfilingFrameIterator::Frame_Ion:
frameKindStr = "ion";
break;
case JS::ProfilingFrameIterator::Frame_AsmJS:
frameKindStr = "asmjs";
break;
default:
frameKindStr = "unknown";
}
frameKind = NewStringCopyZ<CanGC>(cx, frameKindStr);
if (!frameKind)
return false;
if (!JS_DefineProperty(cx, inlineFrameInfo, "kind", frameKind, propAttrs))
return false;
frameLabel = NewStringCopyZ<CanGC>(cx, frames[inlineFrameNo].label);
if (!frameLabel)
return false;
if (!JS_DefineProperty(cx, inlineFrameInfo, "label", frameLabel, propAttrs))
return false;
idx = INT_TO_JSID(inlineFrameNo);
if (!JS_DefinePropertyById(cx, inlineStack, idx, inlineFrameInfo, 0))
return false;
}
// Push inline array into main array.
idx = INT_TO_JSID(physicalFrameNo);
if (!JS_DefinePropertyById(cx, stack, idx, inlineStack, 0))
return false;
}
args.rval().setObject(*stack);
return true;
}
static bool
EnableOsiPointRegisterChecks(JSContext*, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
#ifdef CHECK_OSIPOINT_REGISTERS
jit::JitOptions.checkOsiPointRegisters = true;
#endif
args.rval().setUndefined();
return true;
}
static bool
DisplayName(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (!args.get(0).isObject() || !args[0].toObject().is<JSFunction>()) {
RootedObject arg(cx, &args.callee());
ReportUsageError(cx, arg, "Must have one function argument");
return false;
}
JSFunction* fun = &args[0].toObject().as<JSFunction>();
JSString* str = fun->displayAtom();
args.rval().setString(str ? str : cx->runtime()->emptyString);
return true;
}
static JSObject*
ShellObjectMetadataCallback(JSContext* cx, JSObject*)
{
AutoEnterOOMUnsafeRegion oomUnsafe;
RootedObject obj(cx, NewBuiltinClassInstance<PlainObject>(cx));
if (!obj)
oomUnsafe.crash("ShellObjectMetadataCallback");
RootedObject stack(cx, NewDenseEmptyArray(cx));
if (!stack)
oomUnsafe.crash("ShellObjectMetadataCallback");
static int createdIndex = 0;
createdIndex++;
if (!JS_DefineProperty(cx, obj, "index", createdIndex, 0,
JS_STUBGETTER, JS_STUBSETTER))
{
oomUnsafe.crash("ShellObjectMetadataCallback");
}
if (!JS_DefineProperty(cx, obj, "stack", stack, 0,
JS_STUBGETTER, JS_STUBSETTER))
{
oomUnsafe.crash("ShellObjectMetadataCallback");
}
int stackIndex = 0;
RootedId id(cx);
RootedValue callee(cx);
for (NonBuiltinScriptFrameIter iter(cx); !iter.done(); ++iter) {
if (iter.isFunctionFrame() && iter.compartment() == cx->compartment()) {
id = INT_TO_JSID(stackIndex);
RootedObject callee(cx, iter.callee(cx));
if (!JS_DefinePropertyById(cx, stack, id, callee, 0,
JS_STUBGETTER, JS_STUBSETTER))
{
oomUnsafe.crash("ShellObjectMetadataCallback");
}
stackIndex++;
}
}
return obj;
}
static bool
EnableShellObjectMetadataCallback(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
SetObjectMetadataCallback(cx, ShellObjectMetadataCallback);
args.rval().setUndefined();
return true;
}
static bool
GetObjectMetadata(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 1 || !args[0].isObject()) {
JS_ReportError(cx, "Argument must be an object");
return false;
}
args.rval().setObjectOrNull(GetObjectMetadata(&args[0].toObject()));
return true;
}
static bool
testingFunc_bailout(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
// NOP when not in IonMonkey
args.rval().setUndefined();
return true;
}
static bool
testingFunc_inJit(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (!jit::IsBaselineEnabled(cx)) {
JSString* error = JS_NewStringCopyZ(cx, "Baseline is disabled.");
if(!error)
return false;
args.rval().setString(error);
return true;
}
JSScript* script = cx->currentScript();
if (script && script->getWarmUpResetCount() >= 20) {
JSString* error = JS_NewStringCopyZ(cx, "Compilation is being repeatedly prevented. Giving up.");
if (!error)
return false;
args.rval().setString(error);
return true;
}
args.rval().setBoolean(cx->currentlyRunningInJit());
return true;
}
static bool
testingFunc_inIon(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (!jit::IsIonEnabled(cx)) {
JSString* error = JS_NewStringCopyZ(cx, "Ion is disabled.");
if (!error)
return false;
args.rval().setString(error);
return true;
}
ScriptFrameIter iter(cx);
if (iter.isIon()) {
// Reset the counter of the IonScript's script.
jit::JitFrameIterator jitIter(cx);
++jitIter;
jitIter.script()->resetWarmUpResetCounter();
} else {
// Check if we missed multiple attempts at compiling the innermost script.
JSScript* script = cx->currentScript();
if (script && script->getWarmUpResetCount() >= 20) {
JSString* error = JS_NewStringCopyZ(cx, "Compilation is being repeatedly prevented. Giving up.");
if (!error)
return false;
args.rval().setString(error);
return true;
}
}
args.rval().setBoolean(iter.isIon());
return true;
}
bool
js::testingFunc_assertFloat32(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 2) {
JS_ReportError(cx, "Expects only 2 arguments");
return false;
}
// NOP when not in IonMonkey
args.rval().setUndefined();
return true;
}
static bool
TestingFunc_assertJitStackInvariants(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
jit::AssertJitStackInvariants(cx);
args.rval().setUndefined();
return true;
}
bool
js::testingFunc_assertRecoveredOnBailout(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 2) {
JS_ReportError(cx, "Expects only 2 arguments");
return false;
}
// NOP when not in IonMonkey
args.rval().setUndefined();
return true;
}
static bool
SetJitCompilerOption(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
RootedObject callee(cx, &args.callee());
if (args.length() != 2) {
ReportUsageError(cx, callee, "Wrong number of arguments.");
return false;
}
if (!args[0].isString()) {
ReportUsageError(cx, callee, "First argument must be a String.");
return false;
}
if (!args[1].isInt32()) {
ReportUsageError(cx, callee, "Second argument must be an Int32.");
return false;
}
JSFlatString* strArg = JS_FlattenString(cx, args[0].toString());
#define JIT_COMPILER_MATCH(key, string) \
else if (JS_FlatStringEqualsAscii(strArg, string)) \
opt = JSJITCOMPILER_ ## key;
JSJitCompilerOption opt = JSJITCOMPILER_NOT_AN_OPTION;
if (false) {}
JIT_COMPILER_OPTIONS(JIT_COMPILER_MATCH);
#undef JIT_COMPILER_MATCH
if (opt == JSJITCOMPILER_NOT_AN_OPTION) {
ReportUsageError(cx, callee, "First argument does not name a valid option (see jsapi.h).");
return false;
}
int32_t number = args[1].toInt32();
if (number < 0)
number = -1;
// Throw if disabling the JITs and there's JIT code on the stack, to avoid
// assertion failures.
if ((opt == JSJITCOMPILER_BASELINE_ENABLE || opt == JSJITCOMPILER_ION_ENABLE) &&
number == 0)
{
js::jit::JitActivationIterator iter(cx->runtime());
if (!iter.done()) {
JS_ReportError(cx, "Can't turn off JITs with JIT code on the stack.");
return false;
}
}
JS_SetGlobalJitCompilerOption(cx->runtime(), opt, uint32_t(number));
args.rval().setUndefined();
return true;
}
static bool
GetJitCompilerOptions(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
RootedObject info(cx, JS_NewPlainObject(cx));
if (!info)
return false;
RootedValue value(cx);
#define JIT_COMPILER_MATCH(key, string) \
opt = JSJITCOMPILER_ ## key; \
value.setInt32(JS_GetGlobalJitCompilerOption(cx->runtime(), opt)); \
if (!JS_SetProperty(cx, info, string, value)) \
return false;
JSJitCompilerOption opt = JSJITCOMPILER_NOT_AN_OPTION;
JIT_COMPILER_OPTIONS(JIT_COMPILER_MATCH);
#undef JIT_COMPILER_MATCH
args.rval().setObject(*info);
return true;
}
static bool
SetIonCheckGraphCoherency(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
jit::JitOptions.checkGraphConsistency = ToBoolean(args.get(0));
args.rval().setUndefined();
return true;
}
class CloneBufferObject : public NativeObject {
static const JSPropertySpec props_[2];
static const size_t DATA_SLOT = 0;
static const size_t LENGTH_SLOT = 1;
static const size_t NUM_SLOTS = 2;
public:
static const Class class_;
static CloneBufferObject* Create(JSContext* cx) {
RootedObject obj(cx, JS_NewObject(cx, Jsvalify(&class_)));
if (!obj)
return nullptr;
obj->as<CloneBufferObject>().setReservedSlot(DATA_SLOT, PrivateValue(nullptr));
obj->as<CloneBufferObject>().setReservedSlot(LENGTH_SLOT, Int32Value(0));
if (!JS_DefineProperties(cx, obj, props_))
return nullptr;
return &obj->as<CloneBufferObject>();
}
static CloneBufferObject* Create(JSContext* cx, JSAutoStructuredCloneBuffer* buffer) {
Rooted<CloneBufferObject*> obj(cx, Create(cx));
if (!obj)
return nullptr;
uint64_t* datap;
size_t nbytes;
buffer->steal(&datap, &nbytes);
obj->setData(datap);
obj->setNBytes(nbytes);
return obj;
}
uint64_t* data() const {
return static_cast<uint64_t*>(getReservedSlot(DATA_SLOT).toPrivate());
}
void setData(uint64_t* aData) {
MOZ_ASSERT(!data());
setReservedSlot(DATA_SLOT, PrivateValue(aData));
}
size_t nbytes() const {
return getReservedSlot(LENGTH_SLOT).toInt32();
}
void setNBytes(size_t nbytes) {
MOZ_ASSERT(nbytes <= UINT32_MAX);
setReservedSlot(LENGTH_SLOT, Int32Value(nbytes));
}
// Discard an owned clone buffer.
void discard() {
if (data())
JS_ClearStructuredClone(data(), nbytes(), nullptr, nullptr);
setReservedSlot(DATA_SLOT, PrivateValue(nullptr));
}
static bool
setCloneBuffer_impl(JSContext* cx, const CallArgs& args) {
if (args.length() != 1 || !args[0].isString()) {
JS_ReportError(cx,
"the first argument argument must be maxBytes, "
"maxMallocBytes, gcStackpoolLifespan, gcBytes or "
"gcNumber");
JS_ReportError(cx, "clonebuffer setter requires a single string argument");
return false;
}
if (fuzzingSafe) {
// A manually-created clonebuffer could easily trigger a crash
args.rval().setUndefined();
return true;
}
Rooted<CloneBufferObject*> obj(cx, &args.thisv().toObject().as<CloneBufferObject>());
obj->discard();
char* str = JS_EncodeString(cx, args[0].toString());
if (!str)
return false;
obj->setData(reinterpret_cast<uint64_t*>(str));
obj->setNBytes(JS_GetStringLength(args[0].toString()));
args.rval().setUndefined();
return true;
}
static bool
is(HandleValue v) {
return v.isObject() && v.toObject().is<CloneBufferObject>();
}
static bool
setCloneBuffer(JSContext* cx, unsigned int argc, JS::Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return CallNonGenericMethod<is, setCloneBuffer_impl>(cx, args);
}
static bool
getCloneBuffer_impl(JSContext* cx, const CallArgs& args) {
Rooted<CloneBufferObject*> obj(cx, &args.thisv().toObject().as<CloneBufferObject>());
MOZ_ASSERT(args.length() == 0);
if (!obj->data()) {
args.rval().setUndefined();
return true;
}
bool hasTransferable;
if (!JS_StructuredCloneHasTransferables(obj->data(), obj->nbytes(), &hasTransferable))
return false;
if (hasTransferable) {
JS_ReportError(cx, "cannot retrieve structured clone buffer with transferables");
return false;
}
JSString* str = JS_NewStringCopyN(cx, reinterpret_cast<char*>(obj->data()), obj->nbytes());
if (!str)
return false;
args.rval().setString(str);
return true;
}
static bool
getCloneBuffer(JSContext* cx, unsigned int argc, JS::Value* vp) {
CallArgs args = CallArgsFromVp(argc, vp);
return CallNonGenericMethod<is, getCloneBuffer_impl>(cx, args);
}
static void Finalize(FreeOp* fop, JSObject* obj) {
obj->as<CloneBufferObject>().discard();
}
};
const Class CloneBufferObject::class_ = {
"CloneBuffer", JSCLASS_HAS_RESERVED_SLOTS(CloneBufferObject::NUM_SLOTS),
nullptr, /* addProperty */
nullptr, /* delProperty */
nullptr, /* getProperty */
nullptr, /* setProperty */
nullptr, /* enumerate */
nullptr, /* resolve */
nullptr, /* mayResolve */
Finalize
};
const JSPropertySpec CloneBufferObject::props_[] = {
JS_PSGS("clonebuffer", getCloneBuffer, setCloneBuffer, 0),
JS_PS_END
};
static bool
Serialize(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
JSAutoStructuredCloneBuffer clonebuf;
if (!clonebuf.write(cx, args.get(0), args.get(1)))
return false;
RootedObject obj(cx, CloneBufferObject::Create(cx, &clonebuf));
if (!obj)
return false;
args.rval().setObject(*obj);
return true;
}
static bool
Deserialize(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 1 || !args[0].isObject()) {
JS_ReportError(cx, "deserialize requires a single clonebuffer argument");
return false;
}
if (!args[0].toObject().is<CloneBufferObject>()) {
JS_ReportError(cx, "deserialize requires a clonebuffer");
return false;
}
Rooted<CloneBufferObject*> obj(cx, &args[0].toObject().as<CloneBufferObject>());
// Clone buffer was already consumed?
if (!obj->data()) {
JS_ReportError(cx, "deserialize given invalid clone buffer "
"(transferables already consumed?)");
return false;
}
bool hasTransferable;
if (!JS_StructuredCloneHasTransferables(obj->data(), obj->nbytes(), &hasTransferable))
return false;
RootedValue deserialized(cx);
if (!JS_ReadStructuredClone(cx, obj->data(), obj->nbytes(),
JS_STRUCTURED_CLONE_VERSION, &deserialized, nullptr, nullptr)) {
return false;
}
args.rval().set(deserialized);
if (hasTransferable)
obj->discard();
return true;
}
static bool
Neuter(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 2) {
JS_ReportError(cx, "wrong number of arguments to neuter()");
return false;
}
RootedObject obj(cx);
if (!JS_ValueToObject(cx, args[0], &obj))
return false;
if (!obj) {
JS_ReportError(cx, "neuter must be passed an object");
return false;
}
NeuterDataDisposition changeData;
RootedString str(cx, JS::ToString(cx, args[1]));
if (!str)
return false;
JSAutoByteString dataDisposition(cx, str);
if (!dataDisposition)
return false;
if (strcmp(dataDisposition.ptr(), "same-data") == 0) {
changeData = KeepData;
} else if (strcmp(dataDisposition.ptr(), "change-data") == 0) {
changeData = ChangeData;
} else {
JS_ReportError(cx, "unknown parameter 2 to neuter()");
return false;
}
if (!JS_NeuterArrayBuffer(cx, obj, changeData))
return false;
args.rval().setUndefined();
return true;
}
static bool
HelperThreadCount(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
#ifdef JS_MORE_DETERMINISTIC
// Always return 0 to get consistent output with and without --no-threads.
args.rval().setInt32(0);
#else
if (CanUseExtraThreads())
args.rval().setInt32(HelperThreadState().threadCount);
else
args.rval().setInt32(0);
#endif
return true;
}
static bool
TimesAccessed(JSContext* cx, unsigned argc, Value* vp)
{
static int32_t accessed = 0;
CallArgs args = CallArgsFromVp(argc, vp);
args.rval().setInt32(++accessed);
return true;
}
#ifdef JS_TRACE_LOGGING
static bool
EnableTraceLogger(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
TraceLoggerThread* logger = TraceLoggerForMainThread(cx->runtime());
if (!TraceLoggerEnable(logger, cx))
return false;
args.rval().setUndefined();
return true;
}
static bool
DisableTraceLogger(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
TraceLoggerThread* logger = TraceLoggerForMainThread(cx->runtime());
args.rval().setBoolean(TraceLoggerDisable(logger));
return true;
}
#endif
#ifdef DEBUG
static bool
DumpObject(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
RootedObject obj(cx, ToObject(cx, args.get(0)));
if (!obj)
return false;
DumpObject(obj);
args.rval().setUndefined();
return true;
}
#endif
#ifdef NIGHTLY_BUILD
static bool
ObjectAddress(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 1) {
RootedObject callee(cx, &args.callee());
ReportUsageError(cx, callee, "Wrong number of arguments");
return false;
}
if (!args[0].isObject()) {
RootedObject callee(cx, &args.callee());
ReportUsageError(cx, callee, "Expected object");
return false;
}
#ifdef JS_MORE_DETERMINISTIC
args.rval().setInt32(0);
#else
void* ptr = js::UncheckedUnwrap(&args[0].toObject(), true);
char buffer[64];
JS_snprintf(buffer, sizeof(buffer), "%p", ptr);
JSString* str = JS_NewStringCopyZ(cx, buffer);
if (!str)
return false;
args.rval().setString(str);
#endif
return true;
}
static bool
SharedAddress(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 1) {
RootedObject callee(cx, &args.callee());
ReportUsageError(cx, callee, "Wrong number of arguments");
return false;
}
if (!args[0].isObject()) {
RootedObject callee(cx, &args.callee());
ReportUsageError(cx, callee, "Expected object");
return false;
}
#ifdef JS_MORE_DETERMINISTIC
args.rval().setString(cx->staticStrings().getUint(0));
#else
RootedObject obj(cx, CheckedUnwrap(&args[0].toObject()));
if (!obj) {
JS_ReportError(cx, "Permission denied to access object");
return false;
}
if (!obj->is<SharedArrayBufferObject>()) {
JS_ReportError(cx, "Argument must be a SharedArrayBuffer");
return false;
}
char buffer[64];
uint32_t nchar =
JS_snprintf(buffer, sizeof(buffer), "%p",
obj->as<SharedArrayBufferObject>().dataPointerShared().unwrap(/*safeish*/));
JSString* str = JS_NewStringCopyN(cx, buffer, nchar);
if (!str)
return false;
args.rval().setString(str);
#endif
return true;
}
#endif
static bool
DumpBacktrace(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
DumpBacktrace(cx);
args.rval().setUndefined();
return true;
}
static bool
GetBacktrace(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
bool showArgs = false;
bool showLocals = false;
bool showThisProps = false;
if (args.length() > 1) {
RootedObject callee(cx, &args.callee());
ReportUsageError(cx, callee, "Too many arguments");
return false;
}
if (args.length() == 1) {
RootedObject cfg(cx, ToObject(cx, args[0]));
if (!cfg)
return false;
RootedValue v(cx);
if (!JS_GetProperty(cx, cfg, "args", &v))
return false;
showArgs = ToBoolean(v);
if (!JS_GetProperty(cx, cfg, "locals", &v))
return false;
showLocals = ToBoolean(v);
if (!JS_GetProperty(cx, cfg, "thisprops", &v))
return false;
showThisProps = ToBoolean(v);
}
char* buf = JS::FormatStackDump(cx, nullptr, showArgs, showLocals, showThisProps);
if (!buf)
return false;
RootedString str(cx);
if (!(str = JS_NewStringCopyZ(cx, buf)))
return false;
JS_smprintf_free(buf);
args.rval().setString(str);
return true;
}
static bool
ReportOutOfMemory(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
JS_ReportOutOfMemory(cx);
cx->clearPendingException();
args.rval().setUndefined();
return true;
}
static bool
ReportLargeAllocationFailure(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
void* buf = cx->runtime()->onOutOfMemoryCanGC(AllocFunction::Malloc, JSRuntime::LARGE_ALLOCATION);
js_free(buf);
args.rval().setUndefined();
return true;
}
namespace heaptools {
typedef UniquePtr<char16_t[], JS::FreePolicy> EdgeName;
// An edge to a node from its predecessor in a path through the graph.
class BackEdge {
// The node from which this edge starts.
JS::ubi::Node predecessor_;
// The name of this edge.
EdgeName name_;
public:
BackEdge() : name_(nullptr) { }
// Construct an initialized back edge, taking ownership of |name|.
BackEdge(JS::ubi::Node predecessor, EdgeName name)
: predecessor_(predecessor), name_(Move(name)) { }
BackEdge(BackEdge&& rhs) : predecessor_(rhs.predecessor_), name_(Move(rhs.name_)) { }
BackEdge& operator=(BackEdge&& rhs) {
MOZ_ASSERT(&rhs != this);
this->~BackEdge();
new(this) BackEdge(Move(rhs));
return *this;
}
EdgeName forgetName() { return Move(name_); }
JS::ubi::Node predecessor() const { return predecessor_; }
private:
// No copy constructor or copying assignment.
BackEdge(const BackEdge&) = delete;
BackEdge& operator=(const BackEdge&) = delete;
};
// A path-finding handler class for use with JS::ubi::BreadthFirst.
struct FindPathHandler {
typedef BackEdge NodeData;
typedef JS::ubi::BreadthFirst<FindPathHandler> Traversal;
FindPathHandler(JSContext*cx, JS::ubi::Node start, JS::ubi::Node target,
AutoValueVector& nodes, Vector<EdgeName>& edges)
: cx(cx), start(start), target(target), foundPath(false),
nodes(nodes), edges(edges) { }
bool
operator()(Traversal& traversal, JS::ubi::Node origin, const JS::ubi::Edge& edge,
BackEdge* backEdge, bool first)
{
// We take care of each node the first time we visit it, so there's
// nothing to be done on subsequent visits.
if (!first)
return true;
// Record how we reached this node. This is the last edge on a
// shortest path to this node.
EdgeName edgeName = DuplicateString(cx, edge.name.get());
if (!edgeName)
return false;
*backEdge = mozilla::Move(BackEdge(origin, Move(edgeName)));
// Have we reached our final target node?
if (edge.referent == target) {
// Record the path that got us here, which must be a shortest path.
if (!recordPath(traversal))
return false;
foundPath = true;
traversal.stop();
}
return true;
}
// We've found a path to our target. Walk the backlinks to produce the
// (reversed) path, saving the path in |nodes| and |edges|. |nodes| is
// rooted, so it can hold the path's nodes as we leave the scope of
// the AutoCheckCannotGC.
bool recordPath(Traversal& traversal) {
JS::ubi::Node here = target;
do {
Traversal::NodeMap::Ptr p = traversal.visited.lookup(here);
MOZ_ASSERT(p);
JS::ubi::Node predecessor = p->value().predecessor();
if (!nodes.append(predecessor.exposeToJS()) ||
!edges.append(p->value().forgetName()))
return false;
here = predecessor;
} while (here != start);
return true;
}
JSContext* cx;
// The node we're starting from.
JS::ubi::Node start;
// The node we're looking for.
JS::ubi::Node target;
// True if we found a path to target, false if we didn't.
bool foundPath;
// The nodes and edges of the path --- should we find one. The path is
// stored in reverse order, because that's how it's easiest for us to
// construct it:
// - edges[i] is the name of the edge from nodes[i] to nodes[i-1].
// - edges[0] is the name of the edge from nodes[0] to the target.
// - The last node, nodes[n-1], is the start node.
AutoValueVector& nodes;
Vector<EdgeName>& edges;
};
} // namespace heaptools
static bool
FindPath(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (argc < 2) {
JS_ReportErrorNumber(cx, GetErrorMessage, NULL, JSMSG_MORE_ARGS_NEEDED,
"findPath", "1", "");
return false;
}
// We don't ToString non-objects given as 'start' or 'target', because this
// test is all about object identity, and ToString doesn't preserve that.
// Non-GCThing endpoints don't make much sense.
if (!args[0].isObject() && !args[0].isString() && !args[0].isSymbol()) {
ReportValueErrorFlags(cx, JSREPORT_ERROR, JSMSG_UNEXPECTED_TYPE,
JSDVG_SEARCH_STACK, args[0], nullptr,
"not an object, string, or symbol", NULL);
return false;
}
if (!args[1].isObject() && !args[1].isString() && !args[1].isSymbol()) {
ReportValueErrorFlags(cx, JSREPORT_ERROR, JSMSG_UNEXPECTED_TYPE,
JSDVG_SEARCH_STACK, args[0], nullptr,
"not an object, string, or symbol", NULL);
return false;
}
AutoValueVector nodes(cx);
Vector<heaptools::EdgeName> edges(cx);
{
// We can't tolerate the GC moving things around while we're searching
// the heap. Check that nothing we do causes a GC.
JS::AutoCheckCannotGC autoCannotGC;
JS::ubi::Node start(args[0]), target(args[1]);
heaptools::FindPathHandler handler(cx, start, target, nodes, edges);
heaptools::FindPathHandler::Traversal traversal(cx->runtime(), handler, autoCannotGC);
if (!traversal.init() || !traversal.addStart(start))
return false;
if (!traversal.traverse())
return false;
if (!handler.foundPath) {
// We didn't find any paths from the start to the target.
args.rval().setUndefined();
return true;
}
}
// |nodes| and |edges| contain the path from |start| to |target|, reversed.
// Construct a JavaScript array describing the path from the start to the
// target. Each element has the form:
//
// {
// node: <object or string or symbol>,
// edge: <string describing outgoing edge from node>
// }
//
// or, if the node is some internal thing that isn't a proper JavaScript
// value:
//
// { node: undefined, edge: <string> }
size_t length = nodes.length();
RootedArrayObject result(cx, NewDenseFullyAllocatedArray(cx, length));
if (!result)
return false;
result->ensureDenseInitializedLength(cx, 0, length);
// Walk |nodes| and |edges| in the stored order, and construct the result
// array in start-to-target order.
for (size_t i = 0; i < length; i++) {
// Build an object describing the node and edge.
RootedObject obj(cx, NewBuiltinClassInstance<PlainObject>(cx));
if (!obj)
return false;
if (!JS_DefineProperty(cx, obj, "node", nodes[i],
JSPROP_ENUMERATE, nullptr, nullptr))
return false;
heaptools::EdgeName edgeName = Move(edges[i]);
RootedString edgeStr(cx, NewString<CanGC>(cx, edgeName.get(), js_strlen(edgeName.get())));
if (!edgeStr)
return false;
edgeName.release(); // edgeStr acquired ownership
if (!JS_DefineProperty(cx, obj, "edge", edgeStr, JSPROP_ENUMERATE, nullptr, nullptr))
return false;
result->setDenseElement(length - i - 1, ObjectValue(*obj));
}
args.rval().setObject(*result);
return true;
}
static bool
EvalReturningScope(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (!args.requireAtLeast(cx, "evalReturningScope", 1))
return false;
RootedString str(cx, ToString(cx, args[0]));
if (!str)
return false;
RootedObject global(cx);
if (args.hasDefined(1)) {
global = ToObject(cx, args[1]);
if (!global)
return false;
}
AutoStableStringChars strChars(cx);
if (!strChars.initTwoByte(cx, str))
return false;
mozilla::Range<const char16_t> chars = strChars.twoByteRange();
size_t srclen = chars.length();
const char16_t* src = chars.start().get();
JS::AutoFilename filename;
unsigned lineno;
DescribeScriptedCaller(cx, &filename, &lineno);
JS::CompileOptions options(cx);
options.setFileAndLine(filename.get(), lineno);
options.setNoScriptRval(true);
JS::SourceBufferHolder srcBuf(src, srclen, JS::SourceBufferHolder::NoOwnership);
RootedScript script(cx);
if (!JS::CompileForNonSyntacticScope(cx, options, srcBuf, &script))
return false;
if (global) {
global = CheckedUnwrap(global);
if (!global) {
JS_ReportError(cx, "Permission denied to access global");
return false;
}
if (!global->is<GlobalObject>()) {
JS_ReportError(cx, "Argument must be a global object");
return false;
}
} else {
global = JS::CurrentGlobalOrNull(cx);
}
RootedObject varObj(cx);
RootedObject lexicalScope(cx);
{
// If we're switching globals here, ExecuteInGlobalAndReturnScope will
// take care of cloning the script into that compartment before
// executing it.
AutoCompartment ac(cx, global);
if (!js::ExecuteInGlobalAndReturnScope(cx, global, script, &lexicalScope))
return false;
varObj = lexicalScope->enclosingScope();
}
RootedObject rv(cx, JS_NewPlainObject(cx));
if (!rv)
return false;
RootedValue varObjVal(cx, ObjectValue(*varObj));
if (!cx->compartment()->wrap(cx, &varObjVal))
return false;
if (!JS_SetProperty(cx, rv, "vars", varObjVal))
return false;
RootedValue lexicalScopeVal(cx, ObjectValue(*lexicalScope));
if (!cx->compartment()->wrap(cx, &lexicalScopeVal))
return false;
if (!JS_SetProperty(cx, rv, "lexicals", lexicalScopeVal))
return false;
args.rval().setObject(*rv);
return true;
}
static bool
ShellCloneAndExecuteScript(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (!args.requireAtLeast(cx, "cloneAndExecuteScript", 2))
return false;
RootedString str(cx, ToString(cx, args[0]));
if (!str)
return false;
RootedObject global(cx, ToObject(cx, args[1]));
if (!global)
return false;
AutoStableStringChars strChars(cx);
if (!strChars.initTwoByte(cx, str))
return false;
mozilla::Range<const char16_t> chars = strChars.twoByteRange();
size_t srclen = chars.length();
const char16_t* src = chars.start().get();
JS::AutoFilename filename;
unsigned lineno;
DescribeScriptedCaller(cx, &filename, &lineno);
JS::CompileOptions options(cx);
options.setFileAndLine(filename.get(), lineno);
options.setNoScriptRval(true);
JS::SourceBufferHolder srcBuf(src, srclen, JS::SourceBufferHolder::NoOwnership);
RootedScript script(cx);
if (!JS::Compile(cx, options, srcBuf, &script))
return false;
global = CheckedUnwrap(global);
if (!global) {
JS_ReportError(cx, "Permission denied to access global");
return false;
}
if (!global->is<GlobalObject>()) {
JS_ReportError(cx, "Argument must be a global object");
return false;
}
AutoCompartment ac(cx, global);
if (!JS::CloneAndExecuteScript(cx, script))
return false;
args.rval().setUndefined();
return true;
}
static bool
IsSimdAvailable(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
#ifdef JS_CODEGEN_NONE
bool available = false;
#else
bool available = cx->jitSupportsSimd();
#endif
args.rval().set(BooleanValue(available));
return true;
}
static bool
ByteSize(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
mozilla::MallocSizeOf mallocSizeOf = cx->runtime()->debuggerMallocSizeOf;
{
// We can't tolerate the GC moving things around while we're using a
// ubi::Node. Check that nothing we do causes a GC.
JS::AutoCheckCannotGC autoCannotGC;
JS::ubi::Node node = args.get(0);
if (node)
args.rval().setNumber(uint32_t(node.size(mallocSizeOf)));
else
args.rval().setUndefined();
}
return true;
}
static bool
ByteSizeOfScript(JSContext*cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (!args.requireAtLeast(cx, "byteSizeOfScript", 1))
return false;
if (!args[0].isObject() || !args[0].toObject().is<JSFunction>()) {
JS_ReportError(cx, "Argument must be a Function object");
return false;
}
JSFunction* fun = &args[0].toObject().as<JSFunction>();
if (fun->isNative()) {
JS_ReportError(cx, "Argument must be a scripted function");
return false;
}
RootedScript script(cx, fun->getOrCreateScript(cx));
if (!script)
return false;
mozilla::MallocSizeOf mallocSizeOf = cx->runtime()->debuggerMallocSizeOf;
{
// We can't tolerate the GC moving things around while we're using a
// ubi::Node. Check that nothing we do causes a GC.
JS::AutoCheckCannotGC autoCannotGC;
JS::ubi::Node node = script;
if (node)
args.rval().setNumber(uint32_t(node.size(mallocSizeOf)));
else
args.rval().setUndefined();
}
return true;
}
static bool
ImmutablePrototypesEnabled(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
args.rval().setBoolean(JS_ImmutablePrototypesEnabled());
return true;
}
static bool
SetImmutablePrototype(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (!args.get(0).isObject()) {
JS_ReportError(cx, "setImmutablePrototype: object expected");
return false;
}
RootedObject obj(cx, &args[0].toObject());
bool succeeded;
if (!js::SetImmutablePrototype(cx, obj, &succeeded))
return false;
args.rval().setBoolean(succeeded);
return true;
}
#ifdef DEBUG
static bool
DumpStringRepresentation(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
RootedString str(cx, ToString(cx, args.get(0)));
if (!str)
return false;
str->dumpRepresentation(stderr, 0);
args.rval().setUndefined();
return true;
}
#endif
static bool
SetLazyParsingDisabled(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
bool disable = !args.hasDefined(0) || ToBoolean(args[0]);
JS::CompartmentOptionsRef(cx->compartment()).setDisableLazyParsing(disable);
args.rval().setUndefined();
return true;
}
static bool
SetDiscardSource(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
bool discard = !args.hasDefined(0) || ToBoolean(args[0]);
JS::CompartmentOptionsRef(cx->compartment()).setDiscardSource(discard);
args.rval().setUndefined();
return true;
}
static bool
GetConstructorName(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (!args.requireAtLeast(cx, "getConstructorName", 1))
return false;
if (!args[0].isObject()) {
JS_ReportErrorNumber(cx, GetErrorMessage, nullptr, JSMSG_NOT_EXPECTED_TYPE,
"getConstructorName", "Object",
InformalValueTypeName(args[0]));
return false;
}
RootedAtom name(cx);
if (!args[0].toObject().constructorDisplayAtom(cx, &name))
return false;
if (name) {
args.rval().setString(name);
} else {
args.rval().setNull();
}
return true;
}
static bool
AllocationMarker(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
bool allocateInsideNursery = true;
if (args.length() > 0 && args[0].isObject()) {
RootedObject options(cx, &args[0].toObject());
RootedValue nurseryVal(cx);
if (!JS_GetProperty(cx, options, "nursery", &nurseryVal))
return false;
allocateInsideNursery = ToBoolean(nurseryVal);
}
static const Class cls = { "AllocationMarker" };
auto newKind = allocateInsideNursery ? GenericObject : TenuredObject;
RootedObject obj(cx, NewObjectWithGivenProto(cx, &cls, nullptr, newKind));
if (!obj)
return false;
args.rval().setObject(*obj);
return true;
}
namespace gcCallback {
struct MajorGC {
int32_t depth;
int32_t phases;
};
static void
majorGC(JSRuntime* rt, JSGCStatus status, void* data)
{
auto info = static_cast<MajorGC*>(data);
if (!(info->phases & (1 << status)))
return;
if (info->depth > 0) {
info->depth--;
JS::PrepareForFullGC(rt);
JS::GCForReason(rt, GC_NORMAL, JS::gcreason::API);
info->depth++;
}
}
struct MinorGC {
int32_t phases;
bool active;
};
static void
minorGC(JSRuntime* rt, JSGCStatus status, void* data)
{
auto info = static_cast<MinorGC*>(data);
if (!(info->phases & (1 << status)))
return;
if (info->active) {
info->active = false;
rt->gc.evictNursery(JS::gcreason::DEBUG_GC);
info->active = true;
}
}
// Process global, should really be runtime-local. Also, the final one of these
// is currently leaked, since they are only deleted when changing.
MajorGC* prevMajorGC = nullptr;
MinorGC* prevMinorGC = nullptr;
} /* namespace gcCallback */
static bool
SetGCCallback(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 1) {
JS_ReportError(cx, "Wrong number of arguments");
return false;
}
RootedObject opts(cx, ToObject(cx, args[0]));
if (!opts)
return false;
RootedValue v(cx);
if (!JS_GetProperty(cx, opts, "action", &v))
return false;
JSString* str = JS::ToString(cx, v);
if (!str)
return false;
JSAutoByteString action(cx, str);
if (!action)
return false;
int32_t phases = 0;
if ((strcmp(action.ptr(), "minorGC") == 0) || (strcmp(action.ptr(), "majorGC") == 0)) {
if (!JS_GetProperty(cx, opts, "phases", &v))
return false;
if (v.isUndefined()) {
phases = (1 << JSGC_END);
} else {
JSString* str = JS::ToString(cx, v);
if (!str)
return false;
JSAutoByteString phasesStr(cx, str);
if (!phasesStr)
return false;
if (strcmp(phasesStr.ptr(), "begin") == 0)
phases = (1 << JSGC_BEGIN);
else if (strcmp(phasesStr.ptr(), "end") == 0)
phases = (1 << JSGC_END);
else if (strcmp(phasesStr.ptr(), "both") == 0)
phases = (1 << JSGC_BEGIN) | (1 << JSGC_END);
else {
JS_ReportError(cx, "Invalid callback phase");
return false;
}
}
}
if (gcCallback::prevMajorGC) {
JS_SetGCCallback(cx->runtime(), nullptr, nullptr);
js_delete<gcCallback::MajorGC>(gcCallback::prevMajorGC);
gcCallback::prevMajorGC = nullptr;
}
if (gcCallback::prevMinorGC) {
JS_SetGCCallback(cx->runtime(), nullptr, nullptr);
js_delete<gcCallback::MinorGC>(gcCallback::prevMinorGC);
gcCallback::prevMinorGC = nullptr;
}
if (strcmp(action.ptr(), "minorGC") == 0) {
auto info = js_new<gcCallback::MinorGC>();
info->phases = phases;
info->active = true;
JS_SetGCCallback(cx->runtime(), gcCallback::minorGC, info);
} else if (strcmp(action.ptr(), "majorGC") == 0) {
if (!JS_GetProperty(cx, opts, "depth", &v))
return false;
int32_t depth = 1;
if (!v.isUndefined()) {
if (!ToInt32(cx, v, &depth))
return false;
}
if (depth > int32_t(gcstats::Statistics::MAX_NESTING - 4)) {
JS_ReportError(cx, "Nesting depth too large, would overflow");
return false;
}
auto info = js_new<gcCallback::MajorGC>();
info->phases = phases;
info->depth = depth;
JS_SetGCCallback(cx->runtime(), gcCallback::majorGC, info);
} else {
JS_ReportError(cx, "Unknown GC callback action");
return false;
}
args.rval().setUndefined();
return true;
}
static bool
SetARMHwCapFlags(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 1) {
JS_ReportError(cx, "Wrong number of arguments");
return false;
}
RootedString flagsListString(cx, JS::ToString(cx, args.get(0)));
if (!flagsListString)
return false;
#if defined(JS_CODEGEN_ARM)
JSAutoByteString flagsList(cx, flagsListString);
if (!flagsList)
return false;
jit::ParseARMHwCapFlags(flagsList.ptr());
#endif
args.rval().setUndefined();
return true;
}
static bool
GetLcovInfo(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() > 1) {
JS_ReportError(cx, "Wrong number of arguments");
return false;
}
RootedObject global(cx);
if (args.hasDefined(0)) {
global = ToObject(cx, args[0]);
if (!global) {
JS_ReportError(cx, "First argument should be an object");
return false;
}
global = CheckedUnwrap(global);
if (!global) {
JS_ReportError(cx, "Permission denied to access global");
return false;
}
if (!global->is<GlobalObject>()) {
JS_ReportError(cx, "Argument must be a global object");
return false;
}
} else {
global = JS::CurrentGlobalOrNull(cx);
}
size_t length = 0;
char* content = nullptr;
{
AutoCompartment ac(cx, global);
content = js::GetCodeCoverageSummary(cx, &length);
}
if (!content)
return false;
JSString* str = JS_NewStringCopyN(cx, content, length);
js_free(content);
if (!str)
return false;
args.rval().setString(str);
return true;
}
#ifdef DEBUG
static bool
SetRNGState(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (!args.requireAtLeast(cx, "SetRNGState", 2))
return false;
double d0;
if (!ToNumber(cx, args[0], &d0))
return false;
double d1;
if (!ToNumber(cx, args[1], &d1))
return false;
uint64_t seed0 = static_cast<uint64_t>(d0);
uint64_t seed1 = static_cast<uint64_t>(d1);
if (seed0 == 0 && seed1 == 0) {
JS_ReportError(cx, "RNG requires non-zero seed");
return false;
}
cx->compartment()->ensureRandomNumberGenerator();
cx->compartment()->randomNumberGenerator.ref().setState(seed0, seed1);
args.rval().setUndefined();
return true;
}
#endif
static ModuleEnvironmentObject*
GetModuleEnvironment(JSContext* cx, HandleValue moduleValue)
{
RootedModuleObject module(cx, &moduleValue.toObject().as<ModuleObject>());
// Use the initial environment so that tests can check bindings exists
// before they have been instantiated.
RootedModuleEnvironmentObject env(cx, &module->initialEnvironment());
MOZ_ASSERT(env);
MOZ_ASSERT_IF(module->environment(), module->environment() == env);
return env;
}
static bool
GetModuleEnvironmentNames(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 1) {
JS_ReportError(cx, "Wrong number of arguments");
return false;
}
if (!args[0].isObject() || !args[0].toObject().is<ModuleObject>()) {
JS_ReportError(cx, "First argument should be a ModuleObject");
return false;
}
RootedModuleEnvironmentObject env(cx, GetModuleEnvironment(cx, args[0]));
Rooted<IdVector> ids(cx, IdVector(cx));
if (!JS_Enumerate(cx, env, &ids))
return false;
uint32_t length = ids.length();
RootedArrayObject array(cx, NewDenseFullyAllocatedArray(cx, length));
if (!array)
return false;
array->setDenseInitializedLength(length);
for (uint32_t i = 0; i < length; i++)
array->initDenseElement(i, StringValue(JSID_TO_STRING(ids[i])));
args.rval().setObject(*array);
return true;
}
static bool
GetModuleEnvironmentValue(JSContext* cx, unsigned argc, Value* vp)
{
CallArgs args = CallArgsFromVp(argc, vp);
if (args.length() != 2) {
JS_ReportError(cx, "Wrong number of arguments");
return false;
}
if (!args[0].isObject() || !args[0].toObject().is<ModuleObject>()) {
JS_ReportError(cx, "First argument should be a ModuleObject");
return false;
}
if (!args[1].isString()) {
JS_ReportError(cx, "Second argument should be a string");
return false;
}
RootedModuleEnvironmentObject env(cx, GetModuleEnvironment(cx, args[0]));
RootedString name(cx, args[1].toString());
RootedId id(cx);
if (!JS_StringToId(cx, name, &id))
return false;
return GetProperty(cx, env, env, id, args.rval());
}
static const JSFunctionSpecWithHelp TestingFunctions[] = {
JS_FN_HELP("gc", ::GC, 0, 0,
"gc([obj] | 'compartment' [, 'shrinking'])",
" Run the garbage collector. When obj is given, GC only its compartment.\n"
" If 'compartment' is given, GC any compartments that were scheduled for\n"
" GC via schedulegc.\n"
" If 'shrinking' is passed as the optional second argument, perform a\n"
" shrinking GC rather than a normal GC."),
JS_FN_HELP("minorgc", ::MinorGC, 0, 0,
"minorgc([aboutToOverflow])",
" Run a minor collector on the Nursery. When aboutToOverflow is true, marks\n"
" the store buffer as about-to-overflow before collecting."),
JS_FN_HELP("gcparam", GCParameter, 2, 0,
"gcparam(name [, value])",
" Wrapper for JS_[GS]etGCParameter. The name is one of " GC_PARAMETER_ARGS_LIST),
JS_FN_HELP("relazifyFunctions", RelazifyFunctions, 0, 0,
"relazifyFunctions(...)",
" Perform a GC and allow relazification of functions. Accepts the same\n"
" arguments as gc()."),
JS_FN_HELP("getBuildConfiguration", GetBuildConfiguration, 0, 0,
"getBuildConfiguration()",
" Return an object describing some of the configuration options SpiderMonkey\n"
" was built with."),
JS_FN_HELP("hasChild", HasChild, 0, 0,
"hasChild(parent, child)",
" Return true if |child| is a child of |parent|, as determined by a call to\n"
" TraceChildren"),
JS_FN_HELP("setSavedStacksRNGState", SetSavedStacksRNGState, 1, 0,
"setSavedStacksRNGState(seed)",
" Set this compartment's SavedStacks' RNG state.\n"),
JS_FN_HELP("getSavedFrameCount", GetSavedFrameCount, 0, 0,
"getSavedFrameCount()",
" Return the number of SavedFrame instances stored in this compartment's\n"
" SavedStacks cache."),
JS_FN_HELP("saveStack", SaveStack, 0, 0,
"saveStack([maxDepth [, compartment]])",
" Capture a stack. If 'maxDepth' is given, capture at most 'maxDepth' number\n"
" of frames. If 'compartment' is given, allocate the js::SavedFrame instances\n"
" with the given object's compartment."),
JS_FN_HELP("callFunctionFromNativeFrame", CallFunctionFromNativeFrame, 1, 0,
"callFunctionFromNativeFrame(function)",
" Call 'function' with a (C++-)native frame on stack.\n"
" Required for testing that SaveStack properly handles native frames."),
JS_FN_HELP("callFunctionWithAsyncStack", CallFunctionWithAsyncStack, 0, 0,
"callFunctionWithAsyncStack(function, stack, asyncCause)",
" Call 'function', using the provided stack as the async stack responsible\n"
" for the call, and propagate its return value or the exception it throws.\n"
" The function is called with no arguments, and 'this' is 'undefined'. The\n"
" specified |asyncCause| is attached to the provided stack frame."),
JS_FN_HELP("enableTrackAllocations", EnableTrackAllocations, 0, 0,
"enableTrackAllocations()",
" Start capturing the JS stack at every allocation. Note that this sets an\n"
" object metadata callback that will override any other object metadata\n"
" callback that may be set."),
JS_FN_HELP("disableTrackAllocations", DisableTrackAllocations, 0, 0,
"disableTrackAllocations()",
" Stop capturing the JS stack at every allocation."),
#if defined(DEBUG) || defined(JS_OOM_BREAKPOINT)
JS_FN_HELP("oomThreadTypes", OOMThreadTypes, 0, 0,
"oomThreadTypes()",
" Get the number of thread types that can be used as an argument for\n"
"oomAfterAllocations() and oomAtAllocation()."),
JS_FN_HELP("oomAfterAllocations", OOMAfterAllocations, 2, 0,
"oomAfterAllocations(count [,threadType])",
" After 'count' js_malloc memory allocations, fail every following allocation\n"
" (return nullptr). The optional thread type limits the effect to the\n"
" specified type of helper thread."),
JS_FN_HELP("oomAtAllocation", OOMAtAllocation, 2, 0,
"oomAtAllocation(count [,threadType])",
" After 'count' js_malloc memory allocations, fail the next allocation\n"
" (return nullptr). The optional thread type limits the effect to the\n"
" specified type of helper thread."),
JS_FN_HELP("resetOOMFailure", ResetOOMFailure, 0, 0,
"resetOOMFailure()",
" Remove the allocation failure scheduled by either oomAfterAllocations() or\n"
" oomAtAllocation() and return whether any allocation had been caused to fail."),
JS_FN_HELP("oomTest", OOMTest, 0, 0,
"oomTest(function)",
" Test that the passed function behaves correctly under OOM conditions by\n"
" repeatedly executing it and simulating allocation failure at successive\n"
" allocations until the function completes without seeing a failure."),
#endif
JS_FN_HELP("makeFakePromise", MakeFakePromise, 0, 0,
"makeFakePromise()",
" Create an object whose [[Class]] name is 'Promise' and call\n"
" JS::dbg::onNewPromise on it before returning it. It doesn't actually have\n"
" any of the other behavior associated with promises."),
JS_FN_HELP("settleFakePromise", SettleFakePromise, 1, 0,
"settleFakePromise(promise)",
" 'Settle' a 'promise' created by makeFakePromise(). This doesn't have any\n"
" observable effects outside of firing any onPromiseSettled hooks set on\n"
" Debugger instances that are observing the given promise's global as a\n"
" debuggee."),
JS_FN_HELP("makeFinalizeObserver", MakeFinalizeObserver, 0, 0,
"makeFinalizeObserver()",
" Get a special object whose finalization increases the counter returned\n"
" by the finalizeCount function."),
JS_FN_HELP("finalizeCount", FinalizeCount, 0, 0,
"finalizeCount()",
" Return the current value of the finalization counter that is incremented\n"
" each time an object returned by the makeFinalizeObserver is finalized."),
JS_FN_HELP("gcPreserveCode", GCPreserveCode, 0, 0,
"gcPreserveCode()",
" Preserve JIT code during garbage collections."),
JS_FN_HELP("gczeal", GCZeal, 2, 0,
"gczeal(level, [N])",
gc::ZealModeHelpText),
JS_FN_HELP("schedulegc", ScheduleGC, 1, 0,
"schedulegc([num | obj])",
" If num is given, schedule a GC after num allocations.\n"
" If obj is given, schedule a GC of obj's compartment.\n"
" Returns the number of allocations before the next trigger."),
JS_FN_HELP("selectforgc", SelectForGC, 0, 0,
"selectforgc(obj1, obj2, ...)",
" Schedule the given objects to be marked in the next GC slice."),
JS_FN_HELP("verifyprebarriers", VerifyPreBarriers, 0, 0,
"verifyprebarriers()",
" Start or end a run of the pre-write barrier verifier."),
JS_FN_HELP("verifypostbarriers", VerifyPostBarriers, 0, 0,
"verifypostbarriers()",
" Does nothing (the post-write barrier verifier has been remove)."),
JS_FN_HELP("gcstate", GCState, 0, 0,
"gcstate()",
" Report the global GC state."),
JS_FN_HELP("deterministicgc", DeterministicGC, 1, 0,
"deterministicgc(true|false)",
" If true, only allow determinstic GCs to run."),
JS_FN_HELP("startgc", StartGC, 1, 0,
"startgc([n [, 'shrinking']])",
" Start an incremental GC and run a slice that processes about n objects.\n"
" If 'shrinking' is passesd as the optional second argument, perform a\n"
" shrinking GC rather than a normal GC."),
JS_FN_HELP("gcslice", GCSlice, 1, 0,
"gcslice([n])",
" Start or continue an an incremental GC, running a slice that processes about n objects."),
JS_FN_HELP("abortgc", AbortGC, 1, 0,
"abortgc()",
" Abort the current incremental GC."),
JS_FN_HELP("validategc", ValidateGC, 1, 0,
"validategc(true|false)",
" If true, a separate validation step is performed after an incremental GC."),
JS_FN_HELP("fullcompartmentchecks", FullCompartmentChecks, 1, 0,
"fullcompartmentchecks(true|false)",
" If true, check for compartment mismatches before every GC."),
JS_FN_HELP("nondeterministicGetWeakMapKeys", NondeterministicGetWeakMapKeys, 1, 0,
"nondeterministicGetWeakMapKeys(weakmap)",
" Return an array of the keys in the given WeakMap."),
JS_FN_HELP("internalConst", InternalConst, 1, 0,
"internalConst(name)",
" Query an internal constant for the engine. See InternalConst source for\n"
" the list of constant names."),
JS_FN_HELP("isProxy", IsProxy, 1, 0,
"isProxy(obj)",
" If true, obj is a proxy of some sort"),
JS_FN_HELP("dumpHeap", DumpHeap, 1, 0,
"dumpHeap(['collectNurseryBeforeDump'], [filename])",
" Dump reachable and unreachable objects to the named file, or to stdout. If\n"
" 'collectNurseryBeforeDump' is specified, a minor GC is performed first,\n"
" otherwise objects in the nursery are ignored."),
JS_FN_HELP("terminate", Terminate, 0, 0,
"terminate()",
" Terminate JavaScript execution, as if we had run out of\n"
" memory or been terminated by the slow script dialog."),
JS_FN_HELP("enableSPSProfiling", EnableSPSProfiling, 0, 0,
"enableSPSProfiling()",
" Enables SPS instrumentation and corresponding assertions, with slow\n"
" assertions disabled.\n"),
JS_FN_HELP("enableSPSProfilingWithSlowAssertions", EnableSPSProfilingWithSlowAssertions, 0, 0,
"enableSPSProfilingWithSlowAssertions()",
" Enables SPS instrumentation and corresponding assertions, with slow\n"
" assertions enabled.\n"),
JS_FN_HELP("disableSPSProfiling", DisableSPSProfiling, 0, 0,
"disableSPSProfiling()",
" Disables SPS instrumentation"),
JS_FN_HELP("readSPSProfilingStack", ReadSPSProfilingStack, 0, 0,
"readSPSProfilingStack()",
" Reads the jit stack using ProfilingFrameIterator."),
JS_FN_HELP("enableOsiPointRegisterChecks", EnableOsiPointRegisterChecks, 0, 0,
"enableOsiPointRegisterChecks()",
"Emit extra code to verify live regs at the start of a VM call are not\n"
"modified before its OsiPoint."),
JS_FN_HELP("displayName", DisplayName, 1, 0,
"displayName(fn)",
" Gets the display name for a function, which can possibly be a guessed or\n"
" inferred name based on where the function was defined. This can be\n"
" different from the 'name' property on the function."),
JS_FN_HELP("isAsmJSCompilationAvailable", IsAsmJSCompilationAvailable, 0, 0,
"isAsmJSCompilationAvailable",
" Returns whether asm.js compilation is currently available or whether it is disabled\n"
" (e.g., by the debugger)."),
JS_FN_HELP("isSimdAvailable", IsSimdAvailable, 0, 0,
"isSimdAvailable",
" Returns true if SIMD extensions are supported on this platform."),
JS_FN_HELP("getJitCompilerOptions", GetJitCompilerOptions, 0, 0,
"getCompilerOptions()",
"Return an object describing some of the JIT compiler options.\n"),
JS_FN_HELP("isAsmJSModule", IsAsmJSModule, 1, 0,
"isAsmJSModule(fn)",
" Returns whether the given value is a function containing \"use asm\" that has been\n"
" validated according to the asm.js spec."),
JS_FN_HELP("isAsmJSModuleLoadedFromCache", IsAsmJSModuleLoadedFromCache, 1, 0,
"isAsmJSModuleLoadedFromCache(fn)",
" Return whether the given asm.js module function has been loaded directly\n"
" from the cache. This function throws an error if fn is not a validated asm.js\n"
" module."),
JS_FN_HELP("isAsmJSFunction", IsAsmJSFunction, 1, 0,
"isAsmJSFunction(fn)",
" Returns whether the given value is a nested function in an asm.js module that has been\n"
" both compile- and link-time validated."),
JS_FN_HELP("isLazyFunction", IsLazyFunction, 1, 0,
"isLazyFunction(fun)",
" True if fun is a lazy JSFunction."),
JS_FN_HELP("isRelazifiableFunction", IsRelazifiableFunction, 1, 0,
"isRelazifiableFunction(fun)",
" Ture if fun is a JSFunction with a relazifiable JSScript."),
JS_FN_HELP("enableShellObjectMetadataCallback", EnableShellObjectMetadataCallback, 0, 0,
"enableShellObjectMetadataCallback()",
" Use ShellObjectMetadataCallback to supply metadata for all newly created objects."),
JS_FN_HELP("getObjectMetadata", GetObjectMetadata, 1, 0,
"getObjectMetadata(obj)",
" Get the metadata for an object."),
JS_INLINABLE_FN_HELP("bailout", testingFunc_bailout, 0, 0, TestBailout,
"bailout()",
" Force a bailout out of ionmonkey (if running in ionmonkey)."),
JS_FN_HELP("inJit", testingFunc_inJit, 0, 0,
"inJit()",
" Returns true when called within (jit-)compiled code. When jit compilation is disabled this\n"
" function returns an error string. This function returns false in all other cases.\n"
" Depending on truthiness, you should continue to wait for compilation to happen or stop execution.\n"),
JS_FN_HELP("inIon", testingFunc_inIon, 0, 0,
"inIon()",
" Returns true when called within ion. When ion is disabled or when compilation is abnormally\n"
" slow to start, this function returns an error string. Otherwise, this function returns false.\n"
" This behaviour ensures that a falsy value means that we are not in ion, but expect a\n"
" compilation to occur in the future. Conversely, a truthy value means that we are either in\n"
" ion or that there is litle or no chance of ion ever compiling the current script."),
JS_FN_HELP("assertJitStackInvariants", TestingFunc_assertJitStackInvariants, 0, 0,
"assertJitStackInvariants()",
" Iterates the Jit stack and check that stack invariants hold."),
JS_FN_HELP("setJitCompilerOption", SetJitCompilerOption, 2, 0,
"setCompilerOption(<option>, <number>)",
" Set a compiler option indexed in JSCompileOption enum to a number.\n"),
JS_FN_HELP("setIonCheckGraphCoherency", SetIonCheckGraphCoherency, 1, 0,
"setIonCheckGraphCoherency(bool)",
" Set whether Ion should perform graph consistency (DEBUG-only) assertions. These assertions\n"
" are valuable and should be generally enabled, however they can be very expensive for large\n"
" (asm.js) programs."),
JS_FN_HELP("serialize", Serialize, 1, 0,
"serialize(data, [transferables])",
" Serialize 'data' using JS_WriteStructuredClone. Returns a structured\n"
" clone buffer object."),
JS_FN_HELP("deserialize", Deserialize, 1, 0,
"deserialize(clonebuffer)",
" Deserialize data generated by serialize."),
JS_FN_HELP("neuter", Neuter, 1, 0,
"neuter(buffer, \"change-data\"|\"same-data\")",
" Neuter the given ArrayBuffer object as if it had been transferred to a\n"
" WebWorker. \"change-data\" will update the internal data pointer.\n"
" \"same-data\" will leave it set to its original value, to mimic eg\n"
" asm.js ArrayBuffer neutering."),
JS_FN_HELP("helperThreadCount", HelperThreadCount, 0, 0,
"helperThreadCount()",
" Returns the number of helper threads available for off-main-thread tasks."),
#ifdef JS_TRACE_LOGGING
JS_FN_HELP("startTraceLogger", EnableTraceLogger, 0, 0,
"startTraceLogger()",
" Start logging the mainThread.\n"
" Note: tracelogging starts automatically. Disable it by setting environment variable\n"
" TLOPTIONS=disableMainThread"),
JS_FN_HELP("stopTraceLogger", DisableTraceLogger, 0, 0,
"stopTraceLogger()",
" Stop logging the mainThread."),
#endif
JS_FN_HELP("reportOutOfMemory", ReportOutOfMemory, 0, 0,
"reportOutOfMemory()",
" Report OOM, then clear the exception and return undefined. For crash testing."),
JS_FN_HELP("reportLargeAllocationFailure", ReportLargeAllocationFailure, 0, 0,
"reportLargeAllocationFailure()",
" Call the large allocation failure callback, as though a large malloc call failed,\n"
" then return undefined. In Gecko, this sends a memory pressure notification, which\n"
" can free up some memory."),
JS_FN_HELP("findPath", FindPath, 2, 0,
"findPath(start, target)",
" Return an array describing one of the shortest paths of GC heap edges from\n"
" |start| to |target|, or |undefined| if |target| is unreachable from |start|.\n"
" Each element of the array is either of the form:\n"
" { node: <object or string>, edge: <string describing edge from node> }\n"
" if the node is a JavaScript object or value; or of the form:\n"
" { type: <string describing node>, edge: <string describing edge> }\n"
" if the node is some internal thing that is not a proper JavaScript value\n"
" (like a shape or a scope chain element). The destination of the i'th array\n"
" element's edge is the node of the i+1'th array element; the destination of\n"
" the last array element is implicitly |target|.\n"),
#ifdef DEBUG
JS_FN_HELP("dumpObject", DumpObject, 1, 0,
"dumpObject()",
" Dump an internal representation of an object."),
#endif
#ifdef NIGHTLY_BUILD
JS_FN_HELP("objectAddress", ObjectAddress, 1, 0,
"objectAddress(obj)",
" Return the current address of the object. For debugging only--this\n"
" address may change during a moving GC."),
JS_FN_HELP("sharedAddress", SharedAddress, 1, 0,
"sharedAddress(obj)",
" Return the address of the shared storage of a SharedArrayBuffer."),
#endif
JS_FN_HELP("evalReturningScope", EvalReturningScope, 1, 0,
"evalReturningScope(scriptStr, [global])",
" Evaluate the script in a new scope and return the scope.\n"
" If |global| is present, clone the script to |global| before executing."),
JS_FN_HELP("cloneAndExecuteScript", ShellCloneAndExecuteScript, 2, 0,
"cloneAndExecuteScript(source, global)",
" Compile |source| in the current compartment, clone it into |global|'s\n"
" compartment, and run it there."),
JS_FN_HELP("backtrace", DumpBacktrace, 1, 0,
"backtrace()",
" Dump out a brief backtrace."),
JS_FN_HELP("getBacktrace", GetBacktrace, 1, 0,
"getBacktrace([options])",
" Return the current stack as a string. Takes an optional options object,\n"
" which may contain any or all of the boolean properties\n"
" options.args - show arguments to each function\n"
" options.locals - show local variables in each frame\n"
" options.thisprops - show the properties of the 'this' object of each frame\n"),
JS_FN_HELP("byteSize", ByteSize, 1, 0,
"byteSize(value)",
" Return the size in bytes occupied by |value|, or |undefined| if value\n"
" is not allocated in memory.\n"),
JS_FN_HELP("byteSizeOfScript", ByteSizeOfScript, 1, 0,
"byteSizeOfScript(f)",
" Return the size in bytes occupied by the function |f|'s JSScript.\n"),
JS_FN_HELP("immutablePrototypesEnabled", ImmutablePrototypesEnabled, 0, 0,
"immutablePrototypesEnabled()",
" Returns true if immutable-prototype behavior (triggered by setImmutablePrototype)\n"
" is enabled, such that modifying an immutable prototype will fail."),
JS_FN_HELP("setImmutablePrototype", SetImmutablePrototype, 1, 0,
"setImmutablePrototype(obj)",
" Try to make obj's [[Prototype]] immutable, such that subsequent attempts to\n"
" change it will fail. Return true if obj's [[Prototype]] was successfully made\n"
" immutable (or if it already was immutable), false otherwise. Throws in case\n"
" of internal error, or if the operation doesn't even make sense (for example,\n"
" because the object is a revoked proxy)."),
#ifdef DEBUG
JS_FN_HELP("dumpStringRepresentation", DumpStringRepresentation, 1, 0,
"dumpStringRepresentation(str)",
" Print a human-readable description of how the string |str| is represented.\n"),
#endif
JS_FN_HELP("setLazyParsingDisabled", SetLazyParsingDisabled, 1, 0,
"setLazyParsingDisabled(bool)",
" Explicitly disable lazy parsing in the current compartment. The default is that lazy "
" parsing is not explicitly disabled."),
JS_FN_HELP("setDiscardSource", SetDiscardSource, 1, 0,
"setDiscardSource(bool)",
" Explicitly enable source discarding in the current compartment. The default is that "
" source discarding is not explicitly enabled."),
JS_FN_HELP("getConstructorName", GetConstructorName, 1, 0,
"getConstructorName(object)",
" If the given object was created with `new Ctor`, return the constructor's display name. "
" Otherwise, return null."),
JS_FN_HELP("allocationMarker", AllocationMarker, 0, 0,
"allocationMarker([options])",
" Return a freshly allocated object whose [[Class]] name is\n"
" \"AllocationMarker\". Such objects are allocated only by calls\n"
" to this function, never implicitly by the system, making them\n"
" suitable for use in allocation tooling tests. Takes an optional\n"
" options object which may contain the following properties:\n"
" * nursery: bool, whether to allocate the object in the nursery\n"),
JS_FN_HELP("setGCCallback", SetGCCallback, 1, 0,
"setGCCallback({action:\"...\", options...})",
" Set the GC callback. action may be:\n"
" 'minorGC' - run a nursery collection\n"
" 'majorGC' - run a major collection, nesting up to a given 'depth'\n"),
JS_FN_HELP("setARMHwCapFlags", SetARMHwCapFlags, 1, 0,
"setARMHwCapFlags(\"flag1,flag2 flag3\")",
" On non-ARM, no-op. On ARM, set the hardware capabilities. The list of \n"
" flags is available by calling this function with \"help\" as the flag's name"),
JS_FN_HELP("getLcovInfo", GetLcovInfo, 1, 0,
"getLcovInfo(global)",
" Generate LCOV tracefile for the given compartment. If no global are provided then\n"
" the current global is used as the default one.\n"),
#ifdef DEBUG
JS_FN_HELP("setRNGState", SetRNGState, 2, 0,
"setRNGState(seed0, seed1)",
" Set this compartment's RNG state.\n"),
#endif
JS_FN_HELP("getModuleEnvironmentNames", GetModuleEnvironmentNames, 1, 0,
"getModuleEnvironmentNames(module)",
" Get the list of a module environment's bound names for a specified module.\n"),
JS_FN_HELP("getModuleEnvironmentValue", GetModuleEnvironmentValue, 2, 0,
"getModuleEnvironmentValue(module, name)",
" Get the value of a bound name in a module environment.\n"),
JS_FS_HELP_END
};
static const JSPropertySpec TestingProperties[] = {
JS_PSG("timesAccessed", TimesAccessed, 0),
JS_PS_END
};
bool
js::DefineTestingFunctions(JSContext* cx, HandleObject obj, bool fuzzingSafe_,
bool disableOOMFunctions_)
{
fuzzingSafe = fuzzingSafe_;
if (EnvVarIsDefined("MOZ_FUZZING_SAFE"))
fuzzingSafe = true;
disableOOMFunctions = disableOOMFunctions_;
if (!JS_DefineProperties(cx, obj, TestingProperties))
return false;
return JS_DefineFunctionsWithHelp(cx, obj, TestingFunctions);
}