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cobalt / cobalt / 2a8c847d785c1602f60915c8e0112e0aec6a15a5 / . / src / v8 / src / d8.cc
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/// Copyright 2012 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <algorithm>
#include <fstream>
#include <unordered_map>
#include <utility>
#include <vector>
#ifdef ENABLE_VTUNE_JIT_INTERFACE
#include "src/third_party/vtune/v8-vtune.h"
#endif
#include "src/d8-console.h"
#include "src/d8.h"
#include "src/ostreams.h"
#include "include/libplatform/libplatform.h"
#include "include/libplatform/v8-tracing.h"
#include "include/v8-inspector.h"
#include "src/api.h"
#include "src/base/cpu.h"
#include "src/base/logging.h"
#include "src/base/platform/platform.h"
#include "src/base/platform/time.h"
#include "src/base/sys-info.h"
#include "src/basic-block-profiler.h"
#include "src/debug/debug-interface.h"
#include "src/interpreter/interpreter.h"
#include "src/msan.h"
#include "src/objects-inl.h"
#include "src/objects.h"
#include "src/snapshot/natives.h"
#include "src/trap-handler/trap-handler.h"
#include "src/utils.h"
#include "src/v8.h"
#if !defined(_WIN32) && !defined(_WIN64)
#include <unistd.h> // NOLINT
#else
#include <windows.h> // NOLINT
#if defined(_MSC_VER)
#include <crtdbg.h> // NOLINT
#endif // defined(_MSC_VER)
#endif // !defined(_WIN32) && !defined(_WIN64)
#ifndef DCHECK
#define DCHECK(condition) assert(condition)
#endif
#ifndef CHECK
#define CHECK(condition) assert(condition)
#endif
namespace v8 {
namespace {
const int kMB = 1024 * 1024;
const int kMaxWorkers = 50;
const int kMaxSerializerMemoryUsage =
1 * kMB; // Arbitrary maximum for testing.
// Base class for shell ArrayBuffer allocators. It forwards all opertions to
// the default v8 allocator.
class ArrayBufferAllocatorBase : public v8::ArrayBuffer::Allocator {
public:
void* Allocate(size_t length) override {
return allocator_->Allocate(length);
}
void* AllocateUninitialized(size_t length) override {
return allocator_->AllocateUninitialized(length);
}
void Free(void* data, size_t length) override {
allocator_->Free(data, length);
}
void* Reserve(size_t length) override { return allocator_->Reserve(length); }
void Free(void* data, size_t length, AllocationMode mode) override {
allocator_->Free(data, length, mode);
}
void SetProtection(void* data, size_t length,
Protection protection) override {
allocator_->SetProtection(data, length, protection);
}
private:
std::unique_ptr<Allocator> allocator_ =
std::unique_ptr<Allocator>(NewDefaultAllocator());
};
// ArrayBuffer allocator that can use virtual memory to improve performance.
class ShellArrayBufferAllocator : public ArrayBufferAllocatorBase {
public:
void* Allocate(size_t length) override {
if (length >= kVMThreshold) return AllocateVM(length);
return ArrayBufferAllocatorBase::Allocate(length);
}
void* AllocateUninitialized(size_t length) override {
if (length >= kVMThreshold) return AllocateVM(length);
return ArrayBufferAllocatorBase::AllocateUninitialized(length);
}
void Free(void* data, size_t length) override {
if (length >= kVMThreshold) {
FreeVM(data, length);
} else {
ArrayBufferAllocatorBase::Free(data, length);
}
}
void* Reserve(size_t length) override {
// |length| must be over the threshold so we can distinguish VM from
// malloced memory.
DCHECK_LE(kVMThreshold, length);
return ArrayBufferAllocatorBase::Reserve(length);
}
void Free(void* data, size_t length, AllocationMode) override {
// Ignore allocation mode; the appropriate action is determined by |length|.
Free(data, length);
}
private:
static constexpr size_t kVMThreshold = 65536;
static constexpr size_t kTwoGB = 2u * 1024u * 1024u * 1024u;
void* AllocateVM(size_t length) {
DCHECK_LE(kVMThreshold, length);
// TODO(titzer): allocations should fail if >= 2gb because array buffers
// store their lengths as a SMI internally.
if (length >= kTwoGB) return nullptr;
size_t page_size = i::AllocatePageSize();
size_t allocated = RoundUp(length, page_size);
// Rounding up could go over the limit.
if (allocated >= kTwoGB) return nullptr;
return i::AllocatePages(nullptr, allocated, page_size,
PageAllocator::kReadWrite);
}
void FreeVM(void* data, size_t length) {
size_t page_size = i::AllocatePageSize();
size_t allocated = RoundUp(length, page_size);
CHECK(i::FreePages(data, allocated));
}
};
// ArrayBuffer allocator that never allocates over 10MB.
class MockArrayBufferAllocator : public ArrayBufferAllocatorBase {
void* Allocate(size_t length) override {
return ArrayBufferAllocatorBase::Allocate(Adjust(length));
}
void* AllocateUninitialized(size_t length) override {
return ArrayBufferAllocatorBase::AllocateUninitialized(Adjust(length));
}
void Free(void* data, size_t length) override {
return ArrayBufferAllocatorBase::Free(data, Adjust(length));
}
void* Reserve(size_t length) override {
return ArrayBufferAllocatorBase::Reserve(Adjust(length));
}
void Free(void* data, size_t length, AllocationMode mode) override {
return ArrayBufferAllocatorBase::Free(data, Adjust(length), mode);
}
private:
size_t Adjust(size_t length) {
const size_t kAllocationLimit = 10 * kMB;
return length > kAllocationLimit ? i::AllocatePageSize() : length;
}
};
// Predictable v8::Platform implementation. Background tasks and idle tasks are
// disallowed, and the time reported by {MonotonicallyIncreasingTime} is
// deterministic.
class PredictablePlatform : public Platform {
public:
explicit PredictablePlatform(std::unique_ptr<Platform> platform)
: platform_(std::move(platform)) {
DCHECK_NOT_NULL(platform_);
}
PageAllocator* GetPageAllocator() override {
return platform_->GetPageAllocator();
}
void OnCriticalMemoryPressure() override {
platform_->OnCriticalMemoryPressure();
}
bool OnCriticalMemoryPressure(size_t length) override {
return platform_->OnCriticalMemoryPressure(length);
}
std::shared_ptr<TaskRunner> GetForegroundTaskRunner(
v8::Isolate* isolate) override {
return platform_->GetForegroundTaskRunner(isolate);
}
std::shared_ptr<TaskRunner> GetBackgroundTaskRunner(
v8::Isolate* isolate) override {
// Return the foreground task runner here, so that all tasks get executed
// sequentially in a predictable order.
return platform_->GetForegroundTaskRunner(isolate);
}
void CallOnBackgroundThread(Task* task,
ExpectedRuntime expected_runtime) override {
// It's not defined when background tasks are being executed, so we can just
// execute them right away.
task->Run();
delete task;
}
void CallOnForegroundThread(v8::Isolate* isolate, Task* task) override {
platform_->CallOnForegroundThread(isolate, task);
}
void CallDelayedOnForegroundThread(v8::Isolate* isolate, Task* task,
double delay_in_seconds) override {
platform_->CallDelayedOnForegroundThread(isolate, task, delay_in_seconds);
}
void CallIdleOnForegroundThread(Isolate* isolate, IdleTask* task) override {
UNREACHABLE();
}
bool IdleTasksEnabled(Isolate* isolate) override { return false; }
double MonotonicallyIncreasingTime() override {
return synthetic_time_in_sec_ += 0.00001;
}
double CurrentClockTimeMillis() override {
return MonotonicallyIncreasingTime() * base::Time::kMillisecondsPerSecond;
}
v8::TracingController* GetTracingController() override {
return platform_->GetTracingController();
}
Platform* platform() const { return platform_.get(); }
private:
double synthetic_time_in_sec_ = 0.0;
std::unique_ptr<Platform> platform_;
DISALLOW_COPY_AND_ASSIGN(PredictablePlatform);
};
std::unique_ptr<v8::Platform> g_platform;
v8::Platform* GetDefaultPlatform() {
return i::FLAG_verify_predictable
? static_cast<PredictablePlatform*>(g_platform.get())->platform()
: g_platform.get();
}
static Local<Value> Throw(Isolate* isolate, const char* message) {
return isolate->ThrowException(
String::NewFromUtf8(isolate, message, NewStringType::kNormal)
.ToLocalChecked());
}
Worker* GetWorkerFromInternalField(Isolate* isolate, Local<Object> object) {
if (object->InternalFieldCount() != 1) {
Throw(isolate, "this is not a Worker");
return nullptr;
}
Worker* worker =
static_cast<Worker*>(object->GetAlignedPointerFromInternalField(0));
if (worker == nullptr) {
Throw(isolate, "Worker is defunct because main thread is terminating");
return nullptr;
}
return worker;
}
base::Thread::Options GetThreadOptions(const char* name) {
// On some systems (OSX 10.6) the stack size default is 0.5Mb or less
// which is not enough to parse the big literal expressions used in tests.
// The stack size should be at least StackGuard::kLimitSize + some
// OS-specific padding for thread startup code. 2Mbytes seems to be enough.
return base::Thread::Options(name, 2 * kMB);
}
} // namespace
namespace tracing {
namespace {
// String options that can be used to initialize TraceOptions.
const char kRecordUntilFull[] = "record-until-full";
const char kRecordContinuously[] = "record-continuously";
const char kRecordAsMuchAsPossible[] = "record-as-much-as-possible";
const char kRecordModeParam[] = "record_mode";
const char kEnableSystraceParam[] = "enable_systrace";
const char kEnableArgumentFilterParam[] = "enable_argument_filter";
const char kIncludedCategoriesParam[] = "included_categories";
class TraceConfigParser {
public:
static void FillTraceConfig(v8::Isolate* isolate,
platform::tracing::TraceConfig* trace_config,
const char* json_str) {
HandleScope outer_scope(isolate);
Local<Context> context = Context::New(isolate);
Context::Scope context_scope(context);
HandleScope inner_scope(isolate);
Local<String> source =
String::NewFromUtf8(isolate, json_str, NewStringType::kNormal)
.ToLocalChecked();
Local<Value> result = JSON::Parse(context, source).ToLocalChecked();
Local<v8::Object> trace_config_object = Local<v8::Object>::Cast(result);
trace_config->SetTraceRecordMode(
GetTraceRecordMode(isolate, context, trace_config_object));
if (GetBoolean(isolate, context, trace_config_object,
kEnableSystraceParam)) {
trace_config->EnableSystrace();
}
if (GetBoolean(isolate, context, trace_config_object,
kEnableArgumentFilterParam)) {
trace_config->EnableArgumentFilter();
}
UpdateIncludedCategoriesList(isolate, context, trace_config_object,
trace_config);
}
private:
static bool GetBoolean(v8::Isolate* isolate, Local<Context> context,
Local<v8::Object> object, const char* property) {
Local<Value> value = GetValue(isolate, context, object, property);
if (value->IsNumber()) {
Local<Boolean> v8_boolean = value->ToBoolean(context).ToLocalChecked();
return v8_boolean->Value();
}
return false;
}
static int UpdateIncludedCategoriesList(
v8::Isolate* isolate, Local<Context> context, Local<v8::Object> object,
platform::tracing::TraceConfig* trace_config) {
Local<Value> value =
GetValue(isolate, context, object, kIncludedCategoriesParam);
if (value->IsArray()) {
Local<Array> v8_array = Local<Array>::Cast(value);
for (int i = 0, length = v8_array->Length(); i < length; ++i) {
Local<Value> v = v8_array->Get(context, i)
.ToLocalChecked()
->ToString(context)
.ToLocalChecked();
String::Utf8Value str(isolate, v->ToString(context).ToLocalChecked());
trace_config->AddIncludedCategory(*str);
}
return v8_array->Length();
}
return 0;
}
static platform::tracing::TraceRecordMode GetTraceRecordMode(
v8::Isolate* isolate, Local<Context> context, Local<v8::Object> object) {
Local<Value> value = GetValue(isolate, context, object, kRecordModeParam);
if (value->IsString()) {
Local<String> v8_string = value->ToString(context).ToLocalChecked();
String::Utf8Value str(isolate, v8_string);
if (strcmp(kRecordUntilFull, *str) == 0) {
return platform::tracing::TraceRecordMode::RECORD_UNTIL_FULL;
} else if (strcmp(kRecordContinuously, *str) == 0) {
return platform::tracing::TraceRecordMode::RECORD_CONTINUOUSLY;
} else if (strcmp(kRecordAsMuchAsPossible, *str) == 0) {
return platform::tracing::TraceRecordMode::RECORD_AS_MUCH_AS_POSSIBLE;
}
}
return platform::tracing::TraceRecordMode::RECORD_UNTIL_FULL;
}
static Local<Value> GetValue(v8::Isolate* isolate, Local<Context> context,
Local<v8::Object> object, const char* property) {
Local<String> v8_str =
String::NewFromUtf8(isolate, property, NewStringType::kNormal)
.ToLocalChecked();
return object->Get(context, v8_str).ToLocalChecked();
}
};
} // namespace
static platform::tracing::TraceConfig* CreateTraceConfigFromJSON(
v8::Isolate* isolate, const char* json_str) {
platform::tracing::TraceConfig* trace_config =
new platform::tracing::TraceConfig();
TraceConfigParser::FillTraceConfig(isolate, trace_config, json_str);
return trace_config;
}
} // namespace tracing
class PerIsolateData {
public:
explicit PerIsolateData(Isolate* isolate)
: isolate_(isolate), realms_(nullptr) {
isolate->SetData(0, this);
}
~PerIsolateData() {
isolate_->SetData(0, nullptr); // Not really needed, just to be sure...
}
inline static PerIsolateData* Get(Isolate* isolate) {
return reinterpret_cast<PerIsolateData*>(isolate->GetData(0));
}
class RealmScope {
public:
explicit RealmScope(PerIsolateData* data);
~RealmScope();
private:
PerIsolateData* data_;
};
inline void SetTimeout(Local<Function> callback, Local<Context> context) {
set_timeout_callbacks_.emplace(isolate_, callback);
set_timeout_contexts_.emplace(isolate_, context);
}
inline MaybeLocal<Function> GetTimeoutCallback() {
if (set_timeout_callbacks_.empty()) return MaybeLocal<Function>();
Local<Function> result = set_timeout_callbacks_.front().Get(isolate_);
set_timeout_callbacks_.pop();
return result;
}
inline MaybeLocal<Context> GetTimeoutContext() {
if (set_timeout_contexts_.empty()) return MaybeLocal<Context>();
Local<Context> result = set_timeout_contexts_.front().Get(isolate_);
set_timeout_contexts_.pop();
return result;
}
private:
friend class Shell;
friend class RealmScope;
Isolate* isolate_;
int realm_count_;
int realm_current_;
int realm_switch_;
Global<Context>* realms_;
Global<Value> realm_shared_;
std::queue<Global<Function>> set_timeout_callbacks_;
std::queue<Global<Context>> set_timeout_contexts_;
int RealmIndexOrThrow(const v8::FunctionCallbackInfo<v8::Value>& args,
int arg_offset);
int RealmFind(Local<Context> context);
};
class ExternalOwningOneByteStringResource
: public String::ExternalOneByteStringResource {
public:
ExternalOwningOneByteStringResource() : length_(0) {}
ExternalOwningOneByteStringResource(std::unique_ptr<const char[]> data,
size_t length)
: data_(std::move(data)), length_(length) {}
const char* data() const override { return data_.get(); }
size_t length() const override { return length_; }
private:
std::unique_ptr<const char[]> data_;
size_t length_;
};
CounterMap* Shell::counter_map_;
base::OS::MemoryMappedFile* Shell::counters_file_ = nullptr;
CounterCollection Shell::local_counters_;
CounterCollection* Shell::counters_ = &local_counters_;
base::LazyMutex Shell::context_mutex_;
const base::TimeTicks Shell::kInitialTicks =
base::TimeTicks::HighResolutionNow();
Global<Function> Shell::stringify_function_;
base::LazyMutex Shell::workers_mutex_;
bool Shell::allow_new_workers_ = true;
std::vector<Worker*> Shell::workers_;
std::vector<ExternalizedContents> Shell::externalized_contents_;
base::LazyMutex Shell::isolate_status_lock_;
std::map<v8::Isolate*, bool> Shell::isolate_status_;
base::LazyMutex Shell::cached_code_mutex_;
std::map<std::string, std::unique_ptr<ScriptCompiler::CachedData>>
Shell::cached_code_map_;
Global<Context> Shell::evaluation_context_;
ArrayBuffer::Allocator* Shell::array_buffer_allocator;
ShellOptions Shell::options;
base::OnceType Shell::quit_once_ = V8_ONCE_INIT;
bool CounterMap::Match(void* key1, void* key2) {
const char* name1 = reinterpret_cast<const char*>(key1);
const char* name2 = reinterpret_cast<const char*>(key2);
return strcmp(name1, name2) == 0;
}
// Dummy external source stream which returns the whole source in one go.
class DummySourceStream : public v8::ScriptCompiler::ExternalSourceStream {
public:
explicit DummySourceStream(Local<String> source) : done_(false) {
source_length_ = source->Utf8Length();
source_buffer_.reset(new uint8_t[source_length_]);
source->WriteUtf8(reinterpret_cast<char*>(source_buffer_.get()),
source_length_);
}
virtual size_t GetMoreData(const uint8_t** src) {
if (done_) {
return 0;
}
*src = source_buffer_.release();
done_ = true;
return source_length_;
}
private:
int source_length_;
std::unique_ptr<uint8_t[]> source_buffer_;
bool done_;
};
class BackgroundCompileThread : public base::Thread {
public:
BackgroundCompileThread(Isolate* isolate, Local<String> source)
: base::Thread(GetThreadOptions("BackgroundCompileThread")),
source_(source),
streamed_source_(new DummySourceStream(source),
v8::ScriptCompiler::StreamedSource::UTF8),
task_(v8::ScriptCompiler::StartStreamingScript(isolate,
&streamed_source_)) {}
void Run() override { task_->Run(); }
v8::ScriptCompiler::StreamedSource* streamed_source() {
return &streamed_source_;
}
private:
Local<String> source_;
v8::ScriptCompiler::StreamedSource streamed_source_;
std::unique_ptr<v8::ScriptCompiler::ScriptStreamingTask> task_;
};
ScriptCompiler::CachedData* Shell::LookupCodeCache(Isolate* isolate,
Local<Value> source) {
base::LockGuard<base::Mutex> lock_guard(cached_code_mutex_.Pointer());
CHECK(source->IsString());
v8::String::Utf8Value key(isolate, source);
DCHECK(*key);
auto entry = cached_code_map_.find(*key);
if (entry != cached_code_map_.end() && entry->second) {
int length = entry->second->length;
uint8_t* cache = new uint8_t[length];
memcpy(cache, entry->second->data, length);
ScriptCompiler::CachedData* cached_data = new ScriptCompiler::CachedData(
cache, length, ScriptCompiler::CachedData::BufferOwned);
return cached_data;
}
return nullptr;
}
void Shell::StoreInCodeCache(Isolate* isolate, Local<Value> source,
const ScriptCompiler::CachedData* cache_data) {
base::LockGuard<base::Mutex> lock_guard(cached_code_mutex_.Pointer());
CHECK(source->IsString());
if (cache_data == nullptr) return;
v8::String::Utf8Value key(isolate, source);
DCHECK(*key);
int length = cache_data->length;
uint8_t* cache = new uint8_t[length];
memcpy(cache, cache_data->data, length);
cached_code_map_[*key] = std::unique_ptr<ScriptCompiler::CachedData>(
new ScriptCompiler::CachedData(cache, length,
ScriptCompiler::CachedData::BufferOwned));
}
// Executes a string within the current v8 context.
bool Shell::ExecuteString(Isolate* isolate, Local<String> source,
Local<Value> name, bool print_result,
bool report_exceptions) {
HandleScope handle_scope(isolate);
TryCatch try_catch(isolate);
try_catch.SetVerbose(true);
MaybeLocal<Value> maybe_result;
bool success = true;
{
PerIsolateData* data = PerIsolateData::Get(isolate);
Local<Context> realm =
Local<Context>::New(isolate, data->realms_[data->realm_current_]);
Context::Scope context_scope(realm);
MaybeLocal<Script> maybe_script;
Local<Context> context(isolate->GetCurrentContext());
ScriptOrigin origin(name);
if (options.compile_options == ScriptCompiler::kConsumeCodeCache ||
options.compile_options == ScriptCompiler::kConsumeParserCache) {
ScriptCompiler::CachedData* cached_code =
LookupCodeCache(isolate, source);
if (cached_code != nullptr) {
ScriptCompiler::Source script_source(source, origin, cached_code);
maybe_script = ScriptCompiler::Compile(context, &script_source,
options.compile_options);
CHECK(!cached_code->rejected);
} else {
ScriptCompiler::Source script_source(source, origin);
maybe_script = ScriptCompiler::Compile(
context, &script_source, ScriptCompiler::kNoCompileOptions);
}
} else if (options.stress_background_compile) {
// Start a background thread compiling the script.
BackgroundCompileThread background_compile_thread(isolate, source);
background_compile_thread.Start();
// In parallel, compile on the main thread to flush out any data races.
{
TryCatch ignore_try_catch(isolate);
ScriptCompiler::Source script_source(source, origin);
USE(ScriptCompiler::Compile(context, &script_source,
ScriptCompiler::kNoCompileOptions));
}
// Join with background thread and finalize compilation.
background_compile_thread.Join();
maybe_script = v8::ScriptCompiler::Compile(
context, background_compile_thread.streamed_source(), source, origin);
} else {
ScriptCompiler::Source script_source(source, origin);
maybe_script = ScriptCompiler::Compile(context, &script_source,
options.compile_options);
if (options.compile_options == ScriptCompiler::kProduceParserCache) {
StoreInCodeCache(isolate, source, script_source.GetCachedData());
}
}
Local<Script> script;
if (!maybe_script.ToLocal(&script)) {
// Print errors that happened during compilation.
if (report_exceptions) ReportException(isolate, &try_catch);
return false;
}
if (options.code_cache_options ==
ShellOptions::CodeCacheOptions::kProduceCache) {
// Serialize and store it in memory for the next execution.
ScriptCompiler::CachedData* cached_data =
ScriptCompiler::CreateCodeCache(script->GetUnboundScript(), source);
StoreInCodeCache(isolate, source, cached_data);
delete cached_data;
}
maybe_result = script->Run(realm);
if (options.code_cache_options ==
ShellOptions::CodeCacheOptions::kProduceCacheAfterExecute) {
// Serialize and store it in memory for the next execution.
ScriptCompiler::CachedData* cached_data =
ScriptCompiler::CreateCodeCache(script->GetUnboundScript(), source);
StoreInCodeCache(isolate, source, cached_data);
delete cached_data;
}
if (!EmptyMessageQueues(isolate)) success = false;
data->realm_current_ = data->realm_switch_;
}
Local<Value> result;
if (!maybe_result.ToLocal(&result)) {
DCHECK(try_catch.HasCaught());
// Print errors that happened during execution.
if (report_exceptions) ReportException(isolate, &try_catch);
return false;
}
DCHECK(!try_catch.HasCaught());
if (print_result) {
if (options.test_shell) {
if (!result->IsUndefined()) {
// If all went well and the result wasn't undefined then print
// the returned value.
v8::String::Utf8Value str(isolate, result);
fwrite(*str, sizeof(**str), str.length(), stdout);
printf("\n");
}
} else {
v8::String::Utf8Value str(isolate, Stringify(isolate, result));
fwrite(*str, sizeof(**str), str.length(), stdout);
printf("\n");
}
}
return success;
}
namespace {
std::string ToSTLString(Isolate* isolate, Local<String> v8_str) {
String::Utf8Value utf8(isolate, v8_str);
// Should not be able to fail since the input is a String.
CHECK(*utf8);
return *utf8;
}
bool IsAbsolutePath(const std::string& path) {
#if defined(_WIN32) || defined(_WIN64)
// TODO(adamk): This is an incorrect approximation, but should
// work for all our test-running cases.
return path.find(':') != std::string::npos;
#else
return path[0] == '/';
#endif
}
std::string GetWorkingDirectory() {
#if defined(_WIN32) || defined(_WIN64)
char system_buffer[MAX_PATH];
// TODO(adamk): Support Unicode paths.
DWORD len = GetCurrentDirectoryA(MAX_PATH, system_buffer);
CHECK_GT(len, 0);
return system_buffer;
#else
char curdir[PATH_MAX];
CHECK_NOT_NULL(getcwd(curdir, PATH_MAX));
return curdir;
#endif
}
// Returns the directory part of path, without the trailing '/'.
std::string DirName(const std::string& path) {
DCHECK(IsAbsolutePath(path));
size_t last_slash = path.find_last_of('/');
DCHECK(last_slash != std::string::npos);
return path.substr(0, last_slash);
}
// Resolves path to an absolute path if necessary, and does some
// normalization (eliding references to the current directory
// and replacing backslashes with slashes).
std::string NormalizePath(const std::string& path,
const std::string& dir_name) {
std::string result;
if (IsAbsolutePath(path)) {
result = path;
} else {
result = dir_name + '/' + path;
}
std::replace(result.begin(), result.end(), '\\', '/');
size_t i;
while ((i = result.find("/./")) != std::string::npos) {
result.erase(i, 2);
}
return result;
}
// Per-context Module data, allowing sharing of module maps
// across top-level module loads.
class ModuleEmbedderData {
private:
class ModuleGlobalHash {
public:
explicit ModuleGlobalHash(Isolate* isolate) : isolate_(isolate) {}
size_t operator()(const Global<Module>& module) const {
return module.Get(isolate_)->GetIdentityHash();
}
private:
Isolate* isolate_;
};
public:
explicit ModuleEmbedderData(Isolate* isolate)
: module_to_specifier_map(10, ModuleGlobalHash(isolate)) {}
// Map from normalized module specifier to Module.
std::unordered_map<std::string, Global<Module>> specifier_to_module_map;
// Map from Module to its URL as defined in the ScriptOrigin
std::unordered_map<Global<Module>, std::string, ModuleGlobalHash>
module_to_specifier_map;
};
enum {
kModuleEmbedderDataIndex,
kInspectorClientIndex
};
void InitializeModuleEmbedderData(Local<Context> context) {
context->SetAlignedPointerInEmbedderData(
kModuleEmbedderDataIndex, new ModuleEmbedderData(context->GetIsolate()));
}
ModuleEmbedderData* GetModuleDataFromContext(Local<Context> context) {
return static_cast<ModuleEmbedderData*>(
context->GetAlignedPointerFromEmbedderData(kModuleEmbedderDataIndex));
}
void DisposeModuleEmbedderData(Local<Context> context) {
delete GetModuleDataFromContext(context);
context->SetAlignedPointerInEmbedderData(kModuleEmbedderDataIndex, nullptr);
}
MaybeLocal<Module> ResolveModuleCallback(Local<Context> context,
Local<String> specifier,
Local<Module> referrer) {
Isolate* isolate = context->GetIsolate();
ModuleEmbedderData* d = GetModuleDataFromContext(context);
auto specifier_it =
d->module_to_specifier_map.find(Global<Module>(isolate, referrer));
CHECK(specifier_it != d->module_to_specifier_map.end());
std::string absolute_path = NormalizePath(ToSTLString(isolate, specifier),
DirName(specifier_it->second));
auto module_it = d->specifier_to_module_map.find(absolute_path);
CHECK(module_it != d->specifier_to_module_map.end());
return module_it->second.Get(isolate);
}
} // anonymous namespace
MaybeLocal<Module> Shell::FetchModuleTree(Local<Context> context,
const std::string& file_name) {
DCHECK(IsAbsolutePath(file_name));
Isolate* isolate = context->GetIsolate();
Local<String> source_text = ReadFile(isolate, file_name.c_str());
if (source_text.IsEmpty()) {
std::string msg = "Error reading: " + file_name;
Throw(isolate, msg.c_str());
return MaybeLocal<Module>();
}
ScriptOrigin origin(
String::NewFromUtf8(isolate, file_name.c_str(), NewStringType::kNormal)
.ToLocalChecked(),
Local<Integer>(), Local<Integer>(), Local<Boolean>(), Local<Integer>(),
Local<Value>(), Local<Boolean>(), Local<Boolean>(), True(isolate));
ScriptCompiler::Source source(source_text, origin);
Local<Module> module;
if (!ScriptCompiler::CompileModule(isolate, &source).ToLocal(&module)) {
return MaybeLocal<Module>();
}
ModuleEmbedderData* d = GetModuleDataFromContext(context);
CHECK(d->specifier_to_module_map
.insert(std::make_pair(file_name, Global<Module>(isolate, module)))
.second);
CHECK(d->module_to_specifier_map
.insert(std::make_pair(Global<Module>(isolate, module), file_name))
.second);
std::string dir_name = DirName(file_name);
for (int i = 0, length = module->GetModuleRequestsLength(); i < length; ++i) {
Local<String> name = module->GetModuleRequest(i);
std::string absolute_path =
NormalizePath(ToSTLString(isolate, name), dir_name);
if (!d->specifier_to_module_map.count(absolute_path)) {
if (FetchModuleTree(context, absolute_path).IsEmpty()) {
return MaybeLocal<Module>();
}
}
}
return module;
}
namespace {
struct DynamicImportData {
DynamicImportData(Isolate* isolate_, Local<String> referrer_,
Local<String> specifier_,
Local<Promise::Resolver> resolver_)
: isolate(isolate_) {
referrer.Reset(isolate, referrer_);
specifier.Reset(isolate, specifier_);
resolver.Reset(isolate, resolver_);
}
Isolate* isolate;
Global<String> referrer;
Global<String> specifier;
Global<Promise::Resolver> resolver;
};
} // namespace
MaybeLocal<Promise> Shell::HostImportModuleDynamically(
Local<Context> context, Local<ScriptOrModule> referrer,
Local<String> specifier) {
Isolate* isolate = context->GetIsolate();
MaybeLocal<Promise::Resolver> maybe_resolver =
Promise::Resolver::New(context);
Local<Promise::Resolver> resolver;
if (maybe_resolver.ToLocal(&resolver)) {
DynamicImportData* data = new DynamicImportData(
isolate, Local<String>::Cast(referrer->GetResourceName()), specifier,
resolver);
isolate->EnqueueMicrotask(Shell::DoHostImportModuleDynamically, data);
return resolver->GetPromise();
}
return MaybeLocal<Promise>();
}
void Shell::HostInitializeImportMetaObject(Local<Context> context,
Local<Module> module,
Local<Object> meta) {
Isolate* isolate = context->GetIsolate();
HandleScope handle_scope(isolate);
ModuleEmbedderData* d = GetModuleDataFromContext(context);
auto specifier_it =
d->module_to_specifier_map.find(Global<Module>(isolate, module));
CHECK(specifier_it != d->module_to_specifier_map.end());
Local<String> url_key =
String::NewFromUtf8(isolate, "url", NewStringType::kNormal)
.ToLocalChecked();
Local<String> url = String::NewFromUtf8(isolate, specifier_it->second.c_str(),
NewStringType::kNormal)
.ToLocalChecked();
meta->CreateDataProperty(context, url_key, url).ToChecked();
}
void Shell::DoHostImportModuleDynamically(void* import_data) {
std::unique_ptr<DynamicImportData> import_data_(
static_cast<DynamicImportData*>(import_data));
Isolate* isolate(import_data_->isolate);
HandleScope handle_scope(isolate);
Local<String> referrer(import_data_->referrer.Get(isolate));
Local<String> specifier(import_data_->specifier.Get(isolate));
Local<Promise::Resolver> resolver(import_data_->resolver.Get(isolate));
PerIsolateData* data = PerIsolateData::Get(isolate);
Local<Context> realm = data->realms_[data->realm_current_].Get(isolate);
Context::Scope context_scope(realm);
std::string source_url = ToSTLString(isolate, referrer);
std::string dir_name =
DirName(IsAbsolutePath(source_url)
? source_url
: NormalizePath(source_url, GetWorkingDirectory()));
std::string file_name = ToSTLString(isolate, specifier);
std::string absolute_path = NormalizePath(file_name, dir_name);
TryCatch try_catch(isolate);
try_catch.SetVerbose(true);
ModuleEmbedderData* d = GetModuleDataFromContext(realm);
Local<Module> root_module;
auto module_it = d->specifier_to_module_map.find(absolute_path);
if (module_it != d->specifier_to_module_map.end()) {
root_module = module_it->second.Get(isolate);
} else if (!FetchModuleTree(realm, absolute_path).ToLocal(&root_module)) {
CHECK(try_catch.HasCaught());
resolver->Reject(realm, try_catch.Exception()).ToChecked();
return;
}
MaybeLocal<Value> maybe_result;
if (root_module->InstantiateModule(realm, ResolveModuleCallback)
.FromMaybe(false)) {
maybe_result = root_module->Evaluate(realm);
EmptyMessageQueues(isolate);
}
Local<Value> module;
if (!maybe_result.ToLocal(&module)) {
DCHECK(try_catch.HasCaught());
resolver->Reject(realm, try_catch.Exception()).ToChecked();
return;
}
DCHECK(!try_catch.HasCaught());
Local<Value> module_namespace = root_module->GetModuleNamespace();
resolver->Resolve(realm, module_namespace).ToChecked();
}
bool Shell::ExecuteModule(Isolate* isolate, const char* file_name) {
HandleScope handle_scope(isolate);
PerIsolateData* data = PerIsolateData::Get(isolate);
Local<Context> realm = data->realms_[data->realm_current_].Get(isolate);
Context::Scope context_scope(realm);
std::string absolute_path = NormalizePath(file_name, GetWorkingDirectory());
TryCatch try_catch(isolate);
try_catch.SetVerbose(true);
Local<Module> root_module;
MaybeLocal<Value> maybe_exception;
if (!FetchModuleTree(realm, absolute_path).ToLocal(&root_module)) {
CHECK(try_catch.HasCaught());
ReportException(isolate, &try_catch);
return false;
}
MaybeLocal<Value> maybe_result;
if (root_module->InstantiateModule(realm, ResolveModuleCallback)
.FromMaybe(false)) {
maybe_result = root_module->Evaluate(realm);
EmptyMessageQueues(isolate);
}
Local<Value> result;
if (!maybe_result.ToLocal(&result)) {
DCHECK(try_catch.HasCaught());
// Print errors that happened during execution.
ReportException(isolate, &try_catch);
return false;
}
DCHECK(!try_catch.HasCaught());
return true;
}
PerIsolateData::RealmScope::RealmScope(PerIsolateData* data) : data_(data) {
data_->realm_count_ = 1;
data_->realm_current_ = 0;
data_->realm_switch_ = 0;
data_->realms_ = new Global<Context>[1];
data_->realms_[0].Reset(data_->isolate_,
data_->isolate_->GetEnteredContext());
}
PerIsolateData::RealmScope::~RealmScope() {
// Drop realms to avoid keeping them alive. We don't dispose the
// module embedder data for the first realm here, but instead do
// it in RunShell or in RunMain, if not running in interactive mode
for (int i = 1; i < data_->realm_count_; ++i) {
Global<Context>& realm = data_->realms_[i];
if (realm.IsEmpty()) continue;
DisposeModuleEmbedderData(realm.Get(data_->isolate_));
// TODO(adamk): No need to reset manually, Globals reset when destructed.
realm.Reset();
}
data_->realm_count_ = 0;
delete[] data_->realms_;
// TODO(adamk): No need to reset manually, Globals reset when destructed.
if (!data_->realm_shared_.IsEmpty())
data_->realm_shared_.Reset();
}
int PerIsolateData::RealmFind(Local<Context> context) {
for (int i = 0; i < realm_count_; ++i) {
if (realms_[i] == context) return i;
}
return -1;
}
int PerIsolateData::RealmIndexOrThrow(
const v8::FunctionCallbackInfo<v8::Value>& args,
int arg_offset) {
if (args.Length() < arg_offset || !args[arg_offset]->IsNumber()) {
Throw(args.GetIsolate(), "Invalid argument");
return -1;
}
int index = args[arg_offset]
->Int32Value(args.GetIsolate()->GetCurrentContext())
.FromMaybe(-1);
if (index < 0 || index >= realm_count_ || realms_[index].IsEmpty()) {
Throw(args.GetIsolate(), "Invalid realm index");
return -1;
}
return index;
}
// performance.now() returns a time stamp as double, measured in milliseconds.
// When FLAG_verify_predictable mode is enabled it returns result of
// v8::Platform::MonotonicallyIncreasingTime().
void Shell::PerformanceNow(const v8::FunctionCallbackInfo<v8::Value>& args) {
if (i::FLAG_verify_predictable) {
args.GetReturnValue().Set(g_platform->MonotonicallyIncreasingTime());
} else {
base::TimeDelta delta =
base::TimeTicks::HighResolutionNow() - kInitialTicks;
args.GetReturnValue().Set(delta.InMillisecondsF());
}
}
// Realm.current() returns the index of the currently active realm.
void Shell::RealmCurrent(const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
PerIsolateData* data = PerIsolateData::Get(isolate);
int index = data->RealmFind(isolate->GetEnteredContext());
if (index == -1) return;
args.GetReturnValue().Set(index);
}
// Realm.owner(o) returns the index of the realm that created o.
void Shell::RealmOwner(const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
PerIsolateData* data = PerIsolateData::Get(isolate);
if (args.Length() < 1 || !args[0]->IsObject()) {
Throw(args.GetIsolate(), "Invalid argument");
return;
}
int index = data->RealmFind(args[0]
->ToObject(isolate->GetCurrentContext())
.ToLocalChecked()
->CreationContext());
if (index == -1) return;
args.GetReturnValue().Set(index);
}
// Realm.global(i) returns the global object of realm i.
// (Note that properties of global objects cannot be read/written cross-realm.)
void Shell::RealmGlobal(const v8::FunctionCallbackInfo<v8::Value>& args) {
PerIsolateData* data = PerIsolateData::Get(args.GetIsolate());
int index = data->RealmIndexOrThrow(args, 0);
if (index == -1) return;
args.GetReturnValue().Set(
Local<Context>::New(args.GetIsolate(), data->realms_[index])->Global());
}
MaybeLocal<Context> Shell::CreateRealm(
const v8::FunctionCallbackInfo<v8::Value>& args, int index,
v8::MaybeLocal<Value> global_object) {
Isolate* isolate = args.GetIsolate();
TryCatch try_catch(isolate);
PerIsolateData* data = PerIsolateData::Get(isolate);
if (index < 0) {
Global<Context>* old_realms = data->realms_;
index = data->realm_count_;
data->realms_ = new Global<Context>[++data->realm_count_];
for (int i = 0; i < index; ++i) {
data->realms_[i].Reset(isolate, old_realms[i]);
old_realms[i].Reset();
}
delete[] old_realms;
}
Local<ObjectTemplate> global_template = CreateGlobalTemplate(isolate);
Local<Context> context =
Context::New(isolate, nullptr, global_template, global_object);
DCHECK(!try_catch.HasCaught());
if (context.IsEmpty()) return MaybeLocal<Context>();
InitializeModuleEmbedderData(context);
data->realms_[index].Reset(isolate, context);
args.GetReturnValue().Set(index);
return context;
}
void Shell::DisposeRealm(const v8::FunctionCallbackInfo<v8::Value>& args,
int index) {
Isolate* isolate = args.GetIsolate();
PerIsolateData* data = PerIsolateData::Get(isolate);
DisposeModuleEmbedderData(data->realms_[index].Get(isolate));
data->realms_[index].Reset();
isolate->ContextDisposedNotification();
isolate->IdleNotificationDeadline(g_platform->MonotonicallyIncreasingTime());
}
// Realm.create() creates a new realm with a distinct security token
// and returns its index.
void Shell::RealmCreate(const v8::FunctionCallbackInfo<v8::Value>& args) {
CreateRealm(args, -1, v8::MaybeLocal<Value>());
}
// Realm.createAllowCrossRealmAccess() creates a new realm with the same
// security token as the current realm.
void Shell::RealmCreateAllowCrossRealmAccess(
const v8::FunctionCallbackInfo<v8::Value>& args) {
Local<Context> context;
if (CreateRealm(args, -1, v8::MaybeLocal<Value>()).ToLocal(&context)) {
context->SetSecurityToken(
args.GetIsolate()->GetEnteredContext()->GetSecurityToken());
}
}
// Realm.navigate(i) creates a new realm with a distinct security token
// in place of realm i.
void Shell::RealmNavigate(const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
PerIsolateData* data = PerIsolateData::Get(isolate);
int index = data->RealmIndexOrThrow(args, 0);
if (index == -1) return;
if (index == 0 || index == data->realm_current_ ||
index == data->realm_switch_) {
Throw(args.GetIsolate(), "Invalid realm index");
return;
}
Local<Context> context = Local<Context>::New(isolate, data->realms_[index]);
v8::MaybeLocal<Value> global_object = context->Global();
DisposeRealm(args, index);
CreateRealm(args, index, global_object);
}
// Realm.dispose(i) disposes the reference to the realm i.
void Shell::RealmDispose(const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
PerIsolateData* data = PerIsolateData::Get(isolate);
int index = data->RealmIndexOrThrow(args, 0);
if (index == -1) return;
if (index == 0 ||
index == data->realm_current_ || index == data->realm_switch_) {
Throw(args.GetIsolate(), "Invalid realm index");
return;
}
DisposeRealm(args, index);
}
// Realm.switch(i) switches to the realm i for consecutive interactive inputs.
void Shell::RealmSwitch(const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
PerIsolateData* data = PerIsolateData::Get(isolate);
int index = data->RealmIndexOrThrow(args, 0);
if (index == -1) return;
data->realm_switch_ = index;
}
// Realm.eval(i, s) evaluates s in realm i and returns the result.
void Shell::RealmEval(const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
PerIsolateData* data = PerIsolateData::Get(isolate);
int index = data->RealmIndexOrThrow(args, 0);
if (index == -1) return;
if (args.Length() < 2 || !args[1]->IsString()) {
Throw(args.GetIsolate(), "Invalid argument");
return;
}
ScriptCompiler::Source script_source(
args[1]->ToString(isolate->GetCurrentContext()).ToLocalChecked());
Local<UnboundScript> script;
if (!ScriptCompiler::CompileUnboundScript(isolate, &script_source)
.ToLocal(&script)) {
return;
}
Local<Context> realm = Local<Context>::New(isolate, data->realms_[index]);
realm->Enter();
int previous_index = data->realm_current_;
data->realm_current_ = data->realm_switch_ = index;
Local<Value> result;
if (!script->BindToCurrentContext()->Run(realm).ToLocal(&result)) {
realm->Exit();
data->realm_current_ = data->realm_switch_ = previous_index;
return;
}
realm->Exit();
data->realm_current_ = data->realm_switch_ = previous_index;
args.GetReturnValue().Set(result);
}
// Realm.shared is an accessor for a single shared value across realms.
void Shell::RealmSharedGet(Local<String> property,
const PropertyCallbackInfo<Value>& info) {
Isolate* isolate = info.GetIsolate();
PerIsolateData* data = PerIsolateData::Get(isolate);
if (data->realm_shared_.IsEmpty()) return;
info.GetReturnValue().Set(data->realm_shared_);
}
void Shell::RealmSharedSet(Local<String> property,
Local<Value> value,
const PropertyCallbackInfo<void>& info) {
Isolate* isolate = info.GetIsolate();
PerIsolateData* data = PerIsolateData::Get(isolate);
data->realm_shared_.Reset(isolate, value);
}
void WriteToFile(FILE* file, const v8::FunctionCallbackInfo<v8::Value>& args) {
for (int i = 0; i < args.Length(); i++) {
HandleScope handle_scope(args.GetIsolate());
if (i != 0) {
fprintf(file, " ");
}
// Explicitly catch potential exceptions in toString().
v8::TryCatch try_catch(args.GetIsolate());
Local<Value> arg = args[i];
Local<String> str_obj;
if (arg->IsSymbol()) {
arg = Local<Symbol>::Cast(arg)->Name();
}
if (!arg->ToString(args.GetIsolate()->GetCurrentContext())
.ToLocal(&str_obj)) {
try_catch.ReThrow();
return;
}
v8::String::Utf8Value str(args.GetIsolate(), str_obj);
int n = static_cast<int>(fwrite(*str, sizeof(**str), str.length(), file));
if (n != str.length()) {
printf("Error in fwrite\n");
Shell::Exit(1);
}
}
}
void WriteAndFlush(FILE* file,
const v8::FunctionCallbackInfo<v8::Value>& args) {
WriteToFile(file, args);
fprintf(file, "\n");
fflush(file);
}
void Shell::Print(const v8::FunctionCallbackInfo<v8::Value>& args) {
WriteAndFlush(stdout, args);
}
void Shell::PrintErr(const v8::FunctionCallbackInfo<v8::Value>& args) {
WriteAndFlush(stderr, args);
}
void Shell::Write(const v8::FunctionCallbackInfo<v8::Value>& args) {
WriteToFile(stdout, args);
}
void Shell::Read(const v8::FunctionCallbackInfo<v8::Value>& args) {
String::Utf8Value file(args.GetIsolate(), args[0]);
if (*file == nullptr) {
Throw(args.GetIsolate(), "Error loading file");
return;
}
if (args.Length() == 2) {
String::Utf8Value format(args.GetIsolate(), args[1]);
if (*format && std::strcmp(*format, "binary") == 0) {
ReadBuffer(args);
return;
}
}
Local<String> source = ReadFile(args.GetIsolate(), *file);
if (source.IsEmpty()) {
Throw(args.GetIsolate(), "Error loading file");
return;
}
args.GetReturnValue().Set(source);
}
Local<String> Shell::ReadFromStdin(Isolate* isolate) {
static const int kBufferSize = 256;
char buffer[kBufferSize];
Local<String> accumulator =
String::NewFromUtf8(isolate, "", NewStringType::kNormal).ToLocalChecked();
int length;
while (true) {
// Continue reading if the line ends with an escape '\\' or the line has
// not been fully read into the buffer yet (does not end with '\n').
// If fgets gets an error, just give up.
char* input = nullptr;
input = fgets(buffer, kBufferSize, stdin);
if (input == nullptr) return Local<String>();
length = static_cast<int>(strlen(buffer));
if (length == 0) {
return accumulator;
} else if (buffer[length-1] != '\n') {
accumulator = String::Concat(
accumulator,
String::NewFromUtf8(isolate, buffer, NewStringType::kNormal, length)
.ToLocalChecked());
} else if (length > 1 && buffer[length-2] == '\\') {
buffer[length-2] = '\n';
accumulator = String::Concat(
accumulator,
String::NewFromUtf8(isolate, buffer, NewStringType::kNormal,
length - 1).ToLocalChecked());
} else {
return String::Concat(
accumulator,
String::NewFromUtf8(isolate, buffer, NewStringType::kNormal,
length - 1).ToLocalChecked());
}
}
}
void Shell::Load(const v8::FunctionCallbackInfo<v8::Value>& args) {
for (int i = 0; i < args.Length(); i++) {
HandleScope handle_scope(args.GetIsolate());
String::Utf8Value file(args.GetIsolate(), args[i]);
if (*file == nullptr) {
Throw(args.GetIsolate(), "Error loading file");
return;
}
Local<String> source = ReadFile(args.GetIsolate(), *file);
if (source.IsEmpty()) {
Throw(args.GetIsolate(), "Error loading file");
return;
}
if (!ExecuteString(args.GetIsolate(), source,
String::NewFromUtf8(args.GetIsolate(), *file,
NewStringType::kNormal)
.ToLocalChecked(),
false, !options.quiet_load)) {
Throw(args.GetIsolate(), "Error executing file");
return;
}
}
}
void Shell::SetTimeout(const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
args.GetReturnValue().Set(v8::Number::New(isolate, 0));
if (args.Length() == 0 || !args[0]->IsFunction()) return;
Local<Function> callback = Local<Function>::Cast(args[0]);
Local<Context> context = isolate->GetCurrentContext();
PerIsolateData::Get(isolate)->SetTimeout(callback, context);
}
void Shell::WorkerNew(const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
HandleScope handle_scope(isolate);
if (args.Length() < 1 || !args[0]->IsString()) {
Throw(args.GetIsolate(), "1st argument must be string");
return;
}
if (!args.IsConstructCall()) {
Throw(args.GetIsolate(), "Worker must be constructed with new");
return;
}
{
base::LockGuard<base::Mutex> lock_guard(workers_mutex_.Pointer());
if (workers_.size() >= kMaxWorkers) {
Throw(args.GetIsolate(), "Too many workers, I won't let you create more");
return;
}
// Initialize the embedder field to nullptr; if we return early without
// creating a new Worker (because the main thread is terminating) we can
// early-out from the instance calls.
args.Holder()->SetAlignedPointerInInternalField(0, nullptr);
if (!allow_new_workers_) return;
Worker* worker = new Worker;
args.Holder()->SetAlignedPointerInInternalField(0, worker);
workers_.push_back(worker);
String::Utf8Value script(args.GetIsolate(), args[0]);
if (!*script) {
Throw(args.GetIsolate(), "Can't get worker script");
return;
}
worker->StartExecuteInThread(*script);
}
}
void Shell::WorkerPostMessage(const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
HandleScope handle_scope(isolate);
if (args.Length() < 1) {
Throw(isolate, "Invalid argument");
return;
}
Worker* worker = GetWorkerFromInternalField(isolate, args.Holder());
if (!worker) {
return;
}
Local<Value> message = args[0];
Local<Value> transfer =
args.Length() >= 2 ? args[1] : Local<Value>::Cast(Undefined(isolate));
std::unique_ptr<SerializationData> data =
Shell::SerializeValue(isolate, message, transfer);
if (data) {
worker->PostMessage(std::move(data));
}
}
void Shell::WorkerGetMessage(const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
HandleScope handle_scope(isolate);
Worker* worker = GetWorkerFromInternalField(isolate, args.Holder());
if (!worker) {
return;
}
std::unique_ptr<SerializationData> data = worker->GetMessage();
if (data) {
Local<Value> value;
if (Shell::DeserializeValue(isolate, std::move(data)).ToLocal(&value)) {
args.GetReturnValue().Set(value);
}
}
}
void Shell::WorkerTerminate(const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
HandleScope handle_scope(isolate);
Worker* worker = GetWorkerFromInternalField(isolate, args.Holder());
if (!worker) {
return;
}
worker->Terminate();
}
void Shell::QuitOnce(v8::FunctionCallbackInfo<v8::Value>* args) {
int exit_code = (*args)[0]
->Int32Value(args->GetIsolate()->GetCurrentContext())
.FromMaybe(0);
CleanupWorkers();
args->GetIsolate()->Exit();
OnExit(args->GetIsolate());
Exit(exit_code);
}
void Shell::Quit(const v8::FunctionCallbackInfo<v8::Value>& args) {
base::CallOnce(&quit_once_, &QuitOnce,
const_cast<v8::FunctionCallbackInfo<v8::Value>*>(&args));
}
void Shell::WaitUntilDone(const v8::FunctionCallbackInfo<v8::Value>& args) {
SetWaitUntilDone(args.GetIsolate(), true);
}
void Shell::NotifyDone(const v8::FunctionCallbackInfo<v8::Value>& args) {
SetWaitUntilDone(args.GetIsolate(), false);
}
void Shell::Version(const v8::FunctionCallbackInfo<v8::Value>& args) {
args.GetReturnValue().Set(
String::NewFromUtf8(args.GetIsolate(), V8::GetVersion(),
NewStringType::kNormal).ToLocalChecked());
}
void Shell::ReportException(Isolate* isolate, v8::TryCatch* try_catch) {
HandleScope handle_scope(isolate);
Local<Context> context = isolate->GetCurrentContext();
bool enter_context = context.IsEmpty();
if (enter_context) {
context = Local<Context>::New(isolate, evaluation_context_);
context->Enter();
}
// Converts a V8 value to a C string.
auto ToCString = [](const v8::String::Utf8Value& value) {
return *value ? *value : "<string conversion failed>";
};
v8::String::Utf8Value exception(isolate, try_catch->Exception());
const char* exception_string = ToCString(exception);
Local<Message> message = try_catch->Message();
if (message.IsEmpty()) {
// V8 didn't provide any extra information about this error; just
// print the exception.
printf("%s\n", exception_string);
} else if (message->GetScriptOrigin().Options().IsWasm()) {
// Print wasm-function[(function index)]:(offset): (message).
int function_index = message->GetLineNumber(context).FromJust() - 1;
int offset = message->GetStartColumn(context).FromJust();
printf("wasm-function[%d]:%d: %s\n", function_index, offset,
exception_string);
} else {
// Print (filename):(line number): (message).
v8::String::Utf8Value filename(isolate,
message->GetScriptOrigin().ResourceName());
const char* filename_string = ToCString(filename);
int linenum = message->GetLineNumber(context).FromMaybe(-1);
printf("%s:%i: %s\n", filename_string, linenum, exception_string);
Local<String> sourceline;
if (message->GetSourceLine(context).ToLocal(&sourceline)) {
// Print line of source code.
v8::String::Utf8Value sourcelinevalue(isolate, sourceline);
const char* sourceline_string = ToCString(sourcelinevalue);
printf("%s\n", sourceline_string);
// Print wavy underline (GetUnderline is deprecated).
int start = message->GetStartColumn(context).FromJust();
for (int i = 0; i < start; i++) {
printf(" ");
}
int end = message->GetEndColumn(context).FromJust();
for (int i = start; i < end; i++) {
printf("^");
}
printf("\n");
}
}
Local<Value> stack_trace_string;
if (try_catch->StackTrace(context).ToLocal(&stack_trace_string) &&
stack_trace_string->IsString()) {
v8::String::Utf8Value stack_trace(isolate,
Local<String>::Cast(stack_trace_string));
printf("%s\n", ToCString(stack_trace));
}
printf("\n");
if (enter_context) context->Exit();
}
int32_t* Counter::Bind(const char* name, bool is_histogram) {
int i;
for (i = 0; i < kMaxNameSize - 1 && name[i]; i++)
name_[i] = static_cast<char>(name[i]);
name_[i] = '\0';
is_histogram_ = is_histogram;
return ptr();
}
void Counter::AddSample(int32_t sample) {
count_++;
sample_total_ += sample;
}
CounterCollection::CounterCollection() {
magic_number_ = 0xDEADFACE;
max_counters_ = kMaxCounters;
max_name_size_ = Counter::kMaxNameSize;
counters_in_use_ = 0;
}
Counter* CounterCollection::GetNextCounter() {
if (counters_in_use_ == kMaxCounters) return nullptr;
return &counters_[counters_in_use_++];
}
void Shell::MapCounters(v8::Isolate* isolate, const char* name) {
counters_file_ = base::OS::MemoryMappedFile::create(
name, sizeof(CounterCollection), &local_counters_);
void* memory =
(counters_file_ == nullptr) ? nullptr : counters_file_->memory();
if (memory == nullptr) {
printf("Could not map counters file %s\n", name);
Exit(1);
}
counters_ = static_cast<CounterCollection*>(memory);
isolate->SetCounterFunction(LookupCounter);
isolate->SetCreateHistogramFunction(CreateHistogram);
isolate->SetAddHistogramSampleFunction(AddHistogramSample);
}
int CounterMap::Hash(const char* name) {
int h = 0;
int c;
while ((c = *name++) != 0) {
h += h << 5;
h += c;
}
return h;
}
Counter* Shell::GetCounter(const char* name, bool is_histogram) {
Counter* counter = counter_map_->Lookup(name);
if (counter == nullptr) {
counter = counters_->GetNextCounter();
if (counter != nullptr) {
counter_map_->Set(name, counter);
counter->Bind(name, is_histogram);
}
} else {
DCHECK(counter->is_histogram() == is_histogram);
}
return counter;
}
int* Shell::LookupCounter(const char* name) {
Counter* counter = GetCounter(name, false);
if (counter != nullptr) {
return counter->ptr();
} else {
return nullptr;
}
}
void* Shell::CreateHistogram(const char* name,
int min,
int max,
size_t buckets) {
return GetCounter(name, true);
}
void Shell::AddHistogramSample(void* histogram, int sample) {
Counter* counter = reinterpret_cast<Counter*>(histogram);
counter->AddSample(sample);
}
// Turn a value into a human-readable string.
Local<String> Shell::Stringify(Isolate* isolate, Local<Value> value) {
v8::Local<v8::Context> context =
v8::Local<v8::Context>::New(isolate, evaluation_context_);
if (stringify_function_.IsEmpty()) {
int source_index = i::NativesCollection<i::D8>::GetIndex("d8");
i::Vector<const char> source_string =
i::NativesCollection<i::D8>::GetScriptSource(source_index);
i::Vector<const char> source_name =
i::NativesCollection<i::D8>::GetScriptName(source_index);
Local<String> source =
String::NewFromUtf8(isolate, source_string.start(),
NewStringType::kNormal, source_string.length())
.ToLocalChecked();
Local<String> name =
String::NewFromUtf8(isolate, source_name.start(),
NewStringType::kNormal, source_name.length())
.ToLocalChecked();
ScriptOrigin origin(name);
Local<Script> script =
Script::Compile(context, source, &origin).ToLocalChecked();
stringify_function_.Reset(
isolate, script->Run(context).ToLocalChecked().As<Function>());
}
Local<Function> fun = Local<Function>::New(isolate, stringify_function_);
Local<Value> argv[1] = {value};
v8::TryCatch try_catch(isolate);
MaybeLocal<Value> result = fun->Call(context, Undefined(isolate), 1, argv);
if (result.IsEmpty()) return String::Empty(isolate);
return result.ToLocalChecked().As<String>();
}
Local<ObjectTemplate> Shell::CreateGlobalTemplate(Isolate* isolate) {
Local<ObjectTemplate> global_template = ObjectTemplate::New(isolate);
global_template->Set(
String::NewFromUtf8(isolate, "print", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, Print));
global_template->Set(
String::NewFromUtf8(isolate, "printErr", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, PrintErr));
global_template->Set(
String::NewFromUtf8(isolate, "write", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, Write));
global_template->Set(
String::NewFromUtf8(isolate, "read", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, Read));
global_template->Set(
String::NewFromUtf8(isolate, "readbuffer", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, ReadBuffer));
global_template->Set(
String::NewFromUtf8(isolate, "readline", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, ReadLine));
global_template->Set(
String::NewFromUtf8(isolate, "load", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, Load));
global_template->Set(
String::NewFromUtf8(isolate, "setTimeout", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, SetTimeout));
// Some Emscripten-generated code tries to call 'quit', which in turn would
// call C's exit(). This would lead to memory leaks, because there is no way
// we can terminate cleanly then, so we need a way to hide 'quit'.
if (!options.omit_quit) {
global_template->Set(
String::NewFromUtf8(isolate, "quit", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, Quit));
}
Local<ObjectTemplate> test_template = ObjectTemplate::New(isolate);
global_template->Set(
String::NewFromUtf8(isolate, "testRunner", NewStringType::kNormal)
.ToLocalChecked(),
test_template);
test_template->Set(
String::NewFromUtf8(isolate, "notifyDone", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, NotifyDone));
test_template->Set(
String::NewFromUtf8(isolate, "waitUntilDone", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, WaitUntilDone));
global_template->Set(
String::NewFromUtf8(isolate, "version", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, Version));
global_template->Set(
Symbol::GetToStringTag(isolate),
String::NewFromUtf8(isolate, "global", NewStringType::kNormal)
.ToLocalChecked());
// Bind the Realm object.
Local<ObjectTemplate> realm_template = ObjectTemplate::New(isolate);
realm_template->Set(
String::NewFromUtf8(isolate, "current", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, RealmCurrent));
realm_template->Set(
String::NewFromUtf8(isolate, "owner", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, RealmOwner));
realm_template->Set(
String::NewFromUtf8(isolate, "global", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, RealmGlobal));
realm_template->Set(
String::NewFromUtf8(isolate, "create", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, RealmCreate));
realm_template->Set(
String::NewFromUtf8(isolate, "createAllowCrossRealmAccess",
NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, RealmCreateAllowCrossRealmAccess));
realm_template->Set(
String::NewFromUtf8(isolate, "navigate", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, RealmNavigate));
realm_template->Set(
String::NewFromUtf8(isolate, "dispose", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, RealmDispose));
realm_template->Set(
String::NewFromUtf8(isolate, "switch", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, RealmSwitch));
realm_template->Set(
String::NewFromUtf8(isolate, "eval", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, RealmEval));
realm_template->SetAccessor(
String::NewFromUtf8(isolate, "shared", NewStringType::kNormal)
.ToLocalChecked(),
RealmSharedGet, RealmSharedSet);
global_template->Set(
String::NewFromUtf8(isolate, "Realm", NewStringType::kNormal)
.ToLocalChecked(),
realm_template);
Local<ObjectTemplate> performance_template = ObjectTemplate::New(isolate);
performance_template->Set(
String::NewFromUtf8(isolate, "now", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, PerformanceNow));
global_template->Set(
String::NewFromUtf8(isolate, "performance", NewStringType::kNormal)
.ToLocalChecked(),
performance_template);
Local<FunctionTemplate> worker_fun_template =
FunctionTemplate::New(isolate, WorkerNew);
Local<Signature> worker_signature =
Signature::New(isolate, worker_fun_template);
worker_fun_template->SetClassName(
String::NewFromUtf8(isolate, "Worker", NewStringType::kNormal)
.ToLocalChecked());
worker_fun_template->ReadOnlyPrototype();
worker_fun_template->PrototypeTemplate()->Set(
String::NewFromUtf8(isolate, "terminate", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, WorkerTerminate, Local<Value>(),
worker_signature));
worker_fun_template->PrototypeTemplate()->Set(
String::NewFromUtf8(isolate, "postMessage", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, WorkerPostMessage, Local<Value>(),
worker_signature));
worker_fun_template->PrototypeTemplate()->Set(
String::NewFromUtf8(isolate, "getMessage", NewStringType::kNormal)
.ToLocalChecked(),
FunctionTemplate::New(isolate, WorkerGetMessage, Local<Value>(),
worker_signature));
worker_fun_template->InstanceTemplate()->SetInternalFieldCount(1);
global_template->Set(
String::NewFromUtf8(isolate, "Worker", NewStringType::kNormal)
.ToLocalChecked(),
worker_fun_template);
Local<ObjectTemplate> os_templ = ObjectTemplate::New(isolate);
AddOSMethods(isolate, os_templ);
global_template->Set(
String::NewFromUtf8(isolate, "os", NewStringType::kNormal)
.ToLocalChecked(),
os_templ);
return global_template;
}
static void PrintNonErrorsMessageCallback(Local<Message> message,
Local<Value> error) {
// Nothing to do here for errors, exceptions thrown up to the shell will be
// reported
// separately by {Shell::ReportException} after they are caught.
// Do print other kinds of messages.
switch (message->ErrorLevel()) {
case v8::Isolate::kMessageWarning:
case v8::Isolate::kMessageLog:
case v8::Isolate::kMessageInfo:
case v8::Isolate::kMessageDebug: {
break;
}
case v8::Isolate::kMessageError: {
// Ignore errors, printed elsewhere.
return;
}
default: {
UNREACHABLE();
break;
}
}
// Converts a V8 value to a C string.
auto ToCString = [](const v8::String::Utf8Value& value) {
return *value ? *value : "<string conversion failed>";
};
Isolate* isolate = Isolate::GetCurrent();
v8::String::Utf8Value msg(isolate, message->Get());
const char* msg_string = ToCString(msg);
// Print (filename):(line number): (message).
v8::String::Utf8Value filename(isolate,
message->GetScriptOrigin().ResourceName());
const char* filename_string = ToCString(filename);
Maybe<int> maybeline = message->GetLineNumber(isolate->GetCurrentContext());
int linenum = maybeline.IsJust() ? maybeline.FromJust() : -1;
printf("%s:%i: %s\n", filename_string, linenum, msg_string);
}
void Shell::Initialize(Isolate* isolate) {
// Set up counters
if (i::StrLength(i::FLAG_map_counters) != 0)
MapCounters(isolate, i::FLAG_map_counters);
// Disable default message reporting.
isolate->AddMessageListenerWithErrorLevel(
PrintNonErrorsMessageCallback,
v8::Isolate::kMessageError | v8::Isolate::kMessageWarning |
v8::Isolate::kMessageInfo | v8::Isolate::kMessageDebug |
v8::Isolate::kMessageLog);
}
Local<Context> Shell::CreateEvaluationContext(Isolate* isolate) {
// This needs to be a critical section since this is not thread-safe
base::LockGuard<base::Mutex> lock_guard(context_mutex_.Pointer());
// Initialize the global objects
Local<ObjectTemplate> global_template = CreateGlobalTemplate(isolate);
EscapableHandleScope handle_scope(isolate);
Local<Context> context = Context::New(isolate, nullptr, global_template);
DCHECK(!context.IsEmpty());
InitializeModuleEmbedderData(context);
Context::Scope scope(context);
i::Factory* factory = reinterpret_cast<i::Isolate*>(isolate)->factory();
i::JSArguments js_args = i::FLAG_js_arguments;
i::Handle<i::FixedArray> arguments_array =
factory->NewFixedArray(js_args.argc);
for (int j = 0; j < js_args.argc; j++) {
i::Handle<i::String> arg =
factory->NewStringFromUtf8(i::CStrVector(js_args[j])).ToHandleChecked();
arguments_array->set(j, *arg);
}
i::Handle<i::JSArray> arguments_jsarray =
factory->NewJSArrayWithElements(arguments_array);
context->Global()
->Set(context,
String::NewFromUtf8(isolate, "arguments", NewStringType::kNormal)
.ToLocalChecked(),
Utils::ToLocal(arguments_jsarray))
.FromJust();
return handle_scope.Escape(context);
}
struct CounterAndKey {
Counter* counter;
const char* key;
};
inline bool operator<(const CounterAndKey& lhs, const CounterAndKey& rhs) {
return strcmp(lhs.key, rhs.key) < 0;
}
void Shell::WriteIgnitionDispatchCountersFile(v8::Isolate* isolate) {
HandleScope handle_scope(isolate);
Local<Context> context = Context::New(isolate);
Context::Scope context_scope(context);
Local<Object> dispatch_counters = reinterpret_cast<i::Isolate*>(isolate)
->interpreter()
->GetDispatchCountersObject();
std::ofstream dispatch_counters_stream(
i::FLAG_trace_ignition_dispatches_output_file);
dispatch_counters_stream << *String::Utf8Value(
isolate, JSON::Stringify(context, dispatch_counters).ToLocalChecked());
}
namespace {
int LineFromOffset(Local<debug::Script> script, int offset) {
debug::Location location = script->GetSourceLocation(offset);
return location.GetLineNumber();
}
void WriteLcovDataForRange(std::vector<uint32_t>& lines, int start_line,
int end_line, uint32_t count) {
// Ensure space in the array.
lines.resize(std::max(static_cast<size_t>(end_line + 1), lines.size()), 0);
// Boundary lines could be shared between two functions with different
// invocation counts. Take the maximum.
lines[start_line] = std::max(lines[start_line], count);
lines[end_line] = std::max(lines[end_line], count);
// Invocation counts for non-boundary lines are overwritten.
for (int k = start_line + 1; k < end_line; k++) lines[k] = count;
}
void WriteLcovDataForNamedRange(std::ostream& sink,
std::vector<uint32_t>& lines, std::string name,
int start_line, int end_line, uint32_t count) {
WriteLcovDataForRange(lines, start_line, end_line, count);
sink << "FN:" << start_line + 1 << "," << name << std::endl;
sink << "FNDA:" << count << "," << name << std::endl;
}
} // namespace
// Write coverage data in LCOV format. See man page for geninfo(1).
void Shell::WriteLcovData(v8::Isolate* isolate, const char* file) {
if (!file) return;
HandleScope handle_scope(isolate);
debug::Coverage coverage = debug::Coverage::CollectPrecise(isolate);
std::ofstream sink(file, std::ofstream::app);
for (size_t i = 0; i < coverage.ScriptCount(); i++) {
debug::Coverage::ScriptData script_data = coverage.GetScriptData(i);
Local<debug::Script> script = script_data.GetScript();
// Skip unnamed scripts.
Local<String> name;
if (!script->Name().ToLocal(&name)) continue;
std::string file_name = ToSTLString(isolate, name);
// Skip scripts not backed by a file.
if (!std::ifstream(file_name).good()) continue;
sink << "SF:";
sink << NormalizePath(file_name, GetWorkingDirectory()) << std::endl;
std::vector<uint32_t> lines;
for (size_t j = 0; j < script_data.FunctionCount(); j++) {
debug::Coverage::FunctionData function_data =
script_data.GetFunctionData(j);
// Write function stats.
{
debug::Location start =
script->GetSourceLocation(function_data.StartOffset());
debug::Location end =
script->GetSourceLocation(function_data.EndOffset());
int start_line = start.GetLineNumber();
int end_line = end.GetLineNumber();
uint32_t count = function_data.Count();
Local<String> name;
std::stringstream name_stream;
if (function_data.Name().ToLocal(&name)) {
name_stream << ToSTLString(isolate, name);
} else {
name_stream << "<" << start_line + 1 << "-";
name_stream << start.GetColumnNumber() << ">";
}
WriteLcovDataForNamedRange(sink, lines, name_stream.str(), start_line,
end_line, count);
}
// Process inner blocks.
for (size_t k = 0; k < function_data.BlockCount(); k++) {
debug::Coverage::BlockData block_data = function_data.GetBlockData(k);
int start_line = LineFromOffset(script, block_data.StartOffset());
int end_line = LineFromOffset(script, block_data.EndOffset() - 1);
uint32_t count = block_data.Count();
WriteLcovDataForRange(lines, start_line, end_line, count);
}
}
// Write per-line coverage. LCOV uses 1-based line numbers.
for (size_t i = 0; i < lines.size(); i++) {
sink << "DA:" << (i + 1) << "," << lines[i] << std::endl;
}
sink << "end_of_record" << std::endl;
}
}
void Shell::OnExit(v8::Isolate* isolate) {
// Dump basic block profiling data.
if (i::BasicBlockProfiler* profiler =
reinterpret_cast<i::Isolate*>(isolate)->basic_block_profiler()) {
i::OFStream os(stdout);
os << *profiler;
}
isolate->Dispose();
if (i::FLAG_dump_counters || i::FLAG_dump_counters_nvp) {
int number_of_counters = 0;
for (CounterMap::Iterator i(counter_map_); i.More(); i.Next()) {
number_of_counters++;
}
CounterAndKey* counters = new CounterAndKey[number_of_counters];
int j = 0;
for (CounterMap::Iterator i(counter_map_); i.More(); i.Next(), j++) {
counters[j].counter = i.CurrentValue();
counters[j].key = i.CurrentKey();
}
std::sort(counters, counters + number_of_counters);
if (i::FLAG_dump_counters_nvp) {
// Dump counters as name-value pairs.
for (j = 0; j < number_of_counters; j++) {
Counter* counter = counters[j].counter;
const char* key = counters[j].key;
if (counter->is_histogram()) {
printf("\"c:%s\"=%i\n", key, counter->count());
printf("\"t:%s\"=%i\n", key, counter->sample_total());
} else {
printf("\"%s\"=%i\n", key, counter->count());
}
}
} else {
// Dump counters in formatted boxes.
printf(
"+----------------------------------------------------------------+"
"-------------+\n");
printf(
"| Name |"
" Value |\n");
printf(
"+----------------------------------------------------------------+"
"-------------+\n");
for (j = 0; j < number_of_counters; j++) {
Counter* counter = counters[j].counter;
const char* key = counters[j].key;
if (counter->is_histogram()) {
printf("| c:%-60s | %11i |\n", key, counter->count());
printf("| t:%-60s | %11i |\n", key, counter->sample_total());
} else {
printf("| %-62s | %11i |\n", key, counter->count());
}
}
printf(
"+----------------------------------------------------------------+"
"-------------+\n");
}
delete [] counters;
}
delete counters_file_;
delete counter_map_;
}
static FILE* FOpen(const char* path, const char* mode) {
#if defined(_MSC_VER) && (defined(_WIN32) || defined(_WIN64))
FILE* result;
if (fopen_s(&result, path, mode) == 0) {
return result;
} else {
return nullptr;
}
#else
FILE* file = fopen(path, mode);
if (file == nullptr) return nullptr;
struct stat file_stat;
if (fstat(fileno(file), &file_stat) != 0) return nullptr;
bool is_regular_file = ((file_stat.st_mode & S_IFREG) != 0);
if (is_regular_file) return file;
fclose(file);
return nullptr;
#endif
}
static char* ReadChars(const char* name, int* size_out) {
if (Shell::options.read_from_tcp_port >= 0) {
return Shell::ReadCharsFromTcpPort(name, size_out);
}
FILE* file = FOpen(name, "rb");
if (file == nullptr) return nullptr;
fseek(file, 0, SEEK_END);
size_t size = ftell(file);
rewind(file);
char* chars = new char[size + 1];
chars[size] = '\0';
for (size_t i = 0; i < size;) {
i += fread(&chars[i], 1, size - i, file);
if (ferror(file)) {
fclose(file);
delete[] chars;
return nullptr;
}
}
fclose(file);
*size_out = static_cast<int>(size);
return chars;
}
struct DataAndPersistent {
uint8_t* data;
int byte_length;
Global<ArrayBuffer> handle;
};
static void ReadBufferWeakCallback(
const v8::WeakCallbackInfo<DataAndPersistent>& data) {
int byte_length = data.GetParameter()->byte_length;
data.GetIsolate()->AdjustAmountOfExternalAllocatedMemory(
-static_cast<intptr_t>(byte_length));
delete[] data.GetParameter()->data;
data.GetParameter()->handle.Reset();
delete data.GetParameter();
}
void Shell::ReadBuffer(const v8::FunctionCallbackInfo<v8::Value>& args) {
static_assert(sizeof(char) == sizeof(uint8_t),
"char and uint8_t should both have 1 byte");
Isolate* isolate = args.GetIsolate();
String::Utf8Value filename(isolate, args[0]);
int length;
if (*filename == nullptr) {
Throw(isolate, "Error loading file");
return;
}
DataAndPersistent* data = new DataAndPersistent;
data->data = reinterpret_cast<uint8_t*>(ReadChars(*filename, &length));
if (data->data == nullptr) {
delete data;
Throw(isolate, "Error reading file");
return;
}
data->byte_length = length;
Local<v8::ArrayBuffer> buffer = ArrayBuffer::New(isolate, data->data, length);
data->handle.Reset(isolate, buffer);
data->handle.SetWeak(data, ReadBufferWeakCallback,
v8::WeakCallbackType::kParameter);
isolate->AdjustAmountOfExternalAllocatedMemory(length);
args.GetReturnValue().Set(buffer);
}
// Reads a file into a v8 string.
Local<String> Shell::ReadFile(Isolate* isolate, const char* name) {
int size = 0;
char* chars = ReadChars(name, &size);
if (chars == nullptr) return Local<String>();
Local<String> result;
if (i::FLAG_use_external_strings && i::String::IsAscii(chars, size)) {
String::ExternalOneByteStringResource* resource =
new ExternalOwningOneByteStringResource(
std::unique_ptr<const char[]>(chars), size);
result = String::NewExternalOneByte(isolate, resource).ToLocalChecked();
} else {
result = String::NewFromUtf8(isolate, chars, NewStringType::kNormal, size)
.ToLocalChecked();
delete[] chars;
}
return result;
}
void Shell::RunShell(Isolate* isolate) {
HandleScope outer_scope(isolate);
v8::Local<v8::Context> context =
v8::Local<v8::Context>::New(isolate, evaluation_context_);
v8::Context::Scope context_scope(context);
PerIsolateData::RealmScope realm_scope(PerIsolateData::Get(isolate));
Local<String> name =
String::NewFromUtf8(isolate, "(d8)", NewStringType::kNormal)
.ToLocalChecked();
printf("V8 version %s\n", V8::GetVersion());
while (true) {
HandleScope inner_scope(isolate);
printf("d8> ");
Local<String> input = Shell::ReadFromStdin(isolate);
if (input.IsEmpty()) break;
ExecuteString(isolate, input, name, true, true);
}
printf("\n");
// We need to explicitly clean up the module embedder data for
// the interative shell context.
DisposeModuleEmbedderData(context);
}
class InspectorFrontend final : public v8_inspector::V8Inspector::Channel {
public:
explicit InspectorFrontend(Local<Context> context) {
isolate_ = context->GetIsolate();
context_.Reset(isolate_, context);
}
virtual ~InspectorFrontend() = default;
private:
void sendResponse(
int callId,
std::unique_ptr<v8_inspector::StringBuffer> message) override {
Send(message->string());
}
void sendNotification(
std::unique_ptr<v8_inspector::StringBuffer> message) override {
Send(message->string());
}
void flushProtocolNotifications() override {}
void Send(const v8_inspector::StringView& string) {
v8::Isolate::AllowJavascriptExecutionScope allow_script(isolate_);
int length = static_cast<int>(string.length());
DCHECK_LT(length, v8::String::kMaxLength);
Local<String> message =
(string.is8Bit()
? v8::String::NewFromOneByte(
isolate_,
reinterpret_cast<const uint8_t*>(string.characters8()),
v8::NewStringType::kNormal, length)
: v8::String::NewFromTwoByte(
isolate_,
reinterpret_cast<const uint16_t*>(string.characters16()),
v8::NewStringType::kNormal, length))
.ToLocalChecked();
Local<String> callback_name =
v8::String::NewFromUtf8(isolate_, "receive", v8::NewStringType::kNormal)
.ToLocalChecked();
Local<Context> context = context_.Get(isolate_);
Local<Value> callback =
context->Global()->Get(context, callback_name).ToLocalChecked();
if (callback->IsFunction()) {
v8::TryCatch try_catch(isolate_);
Local<Value> args[] = {message};
USE(Local<Function>::Cast(callback)->Call(context, Undefined(isolate_), 1,
args));
#ifdef DEBUG
if (try_catch.HasCaught()) {
Local<Object> exception = Local<Object>::Cast(try_catch.Exception());
Local<String> key = v8::String::NewFromUtf8(isolate_, "message",
v8::NewStringType::kNormal)
.ToLocalChecked();
Local<String> expected =
v8::String::NewFromUtf8(isolate_,
"Maximum call stack size exceeded",
v8::NewStringType::kNormal)
.ToLocalChecked();
Local<Value> value = exception->Get(context, key).ToLocalChecked();
DCHECK(value->StrictEquals(expected));
}
#endif
}
}
Isolate* isolate_;
Global<Context> context_;
};
class InspectorClient : public v8_inspector::V8InspectorClient {
public:
InspectorClient(Local<Context> context, bool connect) {
if (!connect) return;
isolate_ = context->GetIsolate();
channel_.reset(new InspectorFrontend(context));
inspector_ = v8_inspector::V8Inspector::create(isolate_, this);
session_ =
inspector_->connect(1, channel_.get(), v8_inspector::StringView());
context->SetAlignedPointerInEmbedderData(kInspectorClientIndex, this);
inspector_->contextCreated(v8_inspector::V8ContextInfo(
context, kContextGroupId, v8_inspector::StringView()));
Local<Value> function =
FunctionTemplate::New(isolate_, SendInspectorMessage)
->GetFunction(context)
.ToLocalChecked();
Local<String> function_name =
String::NewFromUtf8(isolate_, "send", NewStringType::kNormal)
.ToLocalChecked();
CHECK(context->Global()->Set(context, function_name, function).FromJust());
v8::debug::SetLiveEditEnabled(isolate_, true);
context_.Reset(isolate_, context);
}
private:
static v8_inspector::V8InspectorSession* GetSession(Local<Context> context) {
InspectorClient* inspector_client = static_cast<InspectorClient*>(
context->GetAlignedPointerFromEmbedderData(kInspectorClientIndex));
return inspector_client->session_.get();
}
Local<Context> ensureDefaultContextInGroup(int group_id) override {
DCHECK(isolate_);
DCHECK_EQ(kContextGroupId, group_id);
return context_.Get(isolate_);
}
static void SendInspectorMessage(
const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
v8::HandleScope handle_scope(isolate);
Local<Context> context = isolate->GetCurrentContext();
args.GetReturnValue().Set(Undefined(isolate));
Local<String> message = args[0]->ToString(context).ToLocalChecked();
v8_inspector::V8InspectorSession* session =
InspectorClient::GetSession(context);
int length = message->Length();
std::unique_ptr<uint16_t[]> buffer(new uint16_t[length]);
message->Write(buffer.get(), 0, length);
v8_inspector::StringView message_view(buffer.get(), length);
session->dispatchProtocolMessage(message_view);
args.GetReturnValue().Set(True(isolate));
}
static const int kContextGroupId = 1;
std::unique_ptr<v8_inspector::V8Inspector> inspector_;
std::unique_ptr<v8_inspector::V8InspectorSession> session_;
std::unique_ptr<v8_inspector::V8Inspector::Channel> channel_;
Global<Context> context_;
Isolate* isolate_;
};
SourceGroup::~SourceGroup() {
delete thread_;
thread_ = nullptr;
}
void SourceGroup::Execute(Isolate* isolate) {
bool exception_was_thrown = false;
for (int i = begin_offset_; i < end_offset_; ++i) {
const char* arg = argv_[i];
if (strcmp(arg, "-e") == 0 && i + 1 < end_offset_) {
// Execute argument given to -e option directly.
HandleScope handle_scope(isolate);
Local<String> file_name =
String::NewFromUtf8(isolate, "unnamed", NewStringType::kNormal)
.ToLocalChecked();
Local<String> source =
String::NewFromUtf8(isolate, argv_[i + 1], NewStringType::kNormal)
.ToLocalChecked();
Shell::options.script_executed = true;
if (!Shell::ExecuteString(isolate, source, file_name, false, true)) {
exception_was_thrown = true;
break;
}
++i;
continue;
} else if (strcmp(arg, "--module") == 0 && i + 1 < end_offset_) {
// Treat the next file as a module.
arg = argv_[++i];
Shell::options.script_executed = true;
if (!Shell::ExecuteModule(isolate, arg)) {
exception_was_thrown = true;
break;
}
continue;
} else if (arg[0] == '-') {
// Ignore other options. They have been parsed already.
continue;
}
// Use all other arguments as names of files to load and run.
HandleScope handle_scope(isolate);
Local<String> file_name =
String::NewFromUtf8(isolate, arg, NewStringType::kNormal)
.ToLocalChecked();
Local<String> source = ReadFile(isolate, arg);
if (source.IsEmpty()) {
printf("Error reading '%s'\n", arg);
Shell::Exit(1);
}
Shell::options.script_executed = true;
if (!Shell::ExecuteString(isolate, source, file_name, false, true)) {
exception_was_thrown = true;
break;
}
}
if (exception_was_thrown != Shell::options.expected_to_throw) {
Shell::Exit(1);
}
}
Local<String> SourceGroup::ReadFile(Isolate* isolate, const char* name) {
return Shell::ReadFile(isolate, name);
}
SourceGroup::IsolateThread::IsolateThread(SourceGroup* group)
: base::Thread(GetThreadOptions("IsolateThread")), group_(group) {}
void SourceGroup::ExecuteInThread() {
Isolate::CreateParams create_params;
create_params.array_buffer_allocator = Shell::array_buffer_allocator;
Isolate* isolate = Isolate::New(create_params);
isolate->SetHostImportModuleDynamicallyCallback(
Shell::HostImportModuleDynamically);
isolate->SetHostInitializeImportMetaObjectCallback(
Shell::HostInitializeImportMetaObject);
Shell::EnsureEventLoopInitialized(isolate);
D8Console console(isolate);
debug::SetConsoleDelegate(isolate, &console);
for (int i = 0; i < Shell::options.stress_runs; ++i) {
next_semaphore_.Wait();
{
Isolate::Scope iscope(isolate);
PerIsolateData data(isolate);
{
HandleScope scope(isolate);
Local<Context> context = Shell::CreateEvaluationContext(isolate);
{
Context::Scope cscope(context);
InspectorClient inspector_client(context,
Shell::options.enable_inspector);
PerIsolateData::RealmScope realm_scope(PerIsolateData::Get(isolate));
Execute(isolate);
Shell::CompleteMessageLoop(isolate);
}
DisposeModuleEmbedderData(context);
}
Shell::CollectGarbage(isolate);
}
done_semaphore_.Signal();
}
isolate->Dispose();
}
void SourceGroup::StartExecuteInThread() {
if (thread_ == nullptr) {
thread_ = new IsolateThread(this);
thread_->Start();
}
next_semaphore_.Signal();
}
void SourceGroup::WaitForThread() {
if (thread_ == nullptr) return;
done_semaphore_.Wait();
}
void SourceGroup::JoinThread() {
if (thread_ == nullptr) return;
thread_->Join();
}
ExternalizedContents::~ExternalizedContents() {
if (base_ != nullptr) {
Shell::array_buffer_allocator->Free(base_, length_, mode_);
}
}
void SerializationDataQueue::Enqueue(std::unique_ptr<SerializationData> data) {
base::LockGuard<base::Mutex> lock_guard(&mutex_);
data_.push_back(std::move(data));
}
bool SerializationDataQueue::Dequeue(
std::unique_ptr<SerializationData>* out_data) {
out_data->reset();
base::LockGuard<base::Mutex> lock_guard(&mutex_);
if (data_.empty()) return false;
*out_data = std::move(data_[0]);
data_.erase(data_.begin());
return true;
}
bool SerializationDataQueue::IsEmpty() {
base::LockGuard<base::Mutex> lock_guard(&mutex_);
return data_.empty();
}
void SerializationDataQueue::Clear() {
base::LockGuard<base::Mutex> lock_guard(&mutex_);
data_.clear();
}
Worker::Worker()
: in_semaphore_(0),
out_semaphore_(0),
thread_(nullptr),
script_(nullptr),
running_(false) {}
Worker::~Worker() {
delete thread_;
thread_ = nullptr;
delete[] script_;
script_ = nullptr;
in_queue_.Clear();
out_queue_.Clear();
}
void Worker::StartExecuteInThread(const char* script) {
running_ = true;
script_ = i::StrDup(script);
thread_ = new WorkerThread(this);
thread_->Start();
}
void Worker::PostMessage(std::unique_ptr<SerializationData> data) {
in_queue_.Enqueue(std::move(data));
in_semaphore_.Signal();
}
std::unique_ptr<SerializationData> Worker::GetMessage() {
std::unique_ptr<SerializationData> result;
while (!out_queue_.Dequeue(&result)) {
// If the worker is no longer running, and there are no messages in the
// queue, don't expect any more messages from it.
if (!base::Relaxed_Load(&running_)) break;
out_semaphore_.Wait();
}
return result;
}
void Worker::Terminate() {
base::Relaxed_Store(&running_, false);
// Post nullptr to wake the Worker thread message loop, and tell it to stop
// running.
PostMessage(nullptr);
}
void Worker::WaitForThread() {
Terminate();
thread_->Join();
}
void Worker::ExecuteInThread() {
Isolate::CreateParams create_params;
create_params.array_buffer_allocator = Shell::array_buffer_allocator;
Isolate* isolate = Isolate::New(create_params);
isolate->SetHostImportModuleDynamicallyCallback(
Shell::HostImportModuleDynamically);
isolate->SetHostInitializeImportMetaObjectCallback(
Shell::HostInitializeImportMetaObject);
D8Console console(isolate);
debug::SetConsoleDelegate(isolate, &console);
{
Isolate::Scope iscope(isolate);
{
HandleScope scope(isolate);
PerIsolateData data(isolate);
Local<Context> context = Shell::CreateEvaluationContext(isolate);
{
Context::Scope cscope(context);
PerIsolateData::RealmScope realm_scope(PerIsolateData::Get(isolate));
Local<Object> global = context->Global();
Local<Value> this_value = External::New(isolate, this);
Local<FunctionTemplate> postmessage_fun_template =
FunctionTemplate::New(isolate, PostMessageOut, this_value);
Local<Function> postmessage_fun;
if (postmessage_fun_template->GetFunction(context)
.ToLocal(&postmessage_fun)) {
global->Set(context, String::NewFromUtf8(isolate, "postMessage",
NewStringType::kNormal)
.ToLocalChecked(),
postmessage_fun).FromJust();
}
// First run the script
Local<String> file_name =
String::NewFromUtf8(isolate, "unnamed", NewStringType::kNormal)
.ToLocalChecked();
Local<String> source =
String::NewFromUtf8(isolate, script_, NewStringType::kNormal)
.ToLocalChecked();
if (Shell::ExecuteString(isolate, source, file_name, false, true)) {
// Get the message handler
Local<Value> onmessage =
global->Get(context, String::NewFromUtf8(isolate, "onmessage",
NewStringType::kNormal)
.ToLocalChecked()).ToLocalChecked();
if (onmessage->IsFunction()) {
Local<Function> onmessage_fun = Local<Function>::Cast(onmessage);
// Now wait for messages
while (true) {
in_semaphore_.Wait();
std::unique_ptr<SerializationData> data;
if (!in_queue_.Dequeue(&data)) continue;
if (!data) {
break;
}
v8::TryCatch try_catch(isolate);
Local<Value> value;
if (Shell::DeserializeValue(isolate, std::move(data))
.ToLocal(&value)) {
Local<Value> argv[] = {value};
(void)onmessage_fun->Call(context, global, 1, argv);
}
if (try_catch.HasCaught()) {
Shell::ReportException(isolate, &try_catch);
}
}
}
}
}
DisposeModuleEmbedderData(context);
}
Shell::CollectGarbage(isolate);
}
isolate->Dispose();
// Post nullptr to wake the thread waiting on GetMessage() if there is one.
out_queue_.Enqueue(nullptr);
out_semaphore_.Signal();
}
void Worker::PostMessageOut(const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
HandleScope handle_scope(isolate);
if (args.Length() < 1) {
Throw(isolate, "Invalid argument");
return;
}
Local<Value> message = args[0];
Local<Value> transfer = Undefined(isolate);
std::unique_ptr<SerializationData> data =
Shell::SerializeValue(isolate, message, transfer);
if (data) {
DCHECK(args.Data()->IsExternal());
Local<External> this_value = Local<External>::Cast(args.Data());
Worker* worker = static_cast<Worker*>(this_value->Value());
worker->out_queue_.Enqueue(std::move(data));
worker->out_semaphore_.Signal();
}
}
void SetFlagsFromString(const char* flags) {
v8::V8::SetFlagsFromString(flags, static_cast<int>(strlen(flags)));
}
bool Shell::SetOptions(int argc, char* argv[]) {
bool logfile_per_isolate = false;
for (int i = 0; i < argc; i++) {
if (strcmp(argv[i], "--stress-opt") == 0) {
options.stress_opt = true;
argv[i] = nullptr;
} else if (strcmp(argv[i], "--nostress-opt") == 0 ||
strcmp(argv[i], "--no-stress-opt") == 0) {
options.stress_opt = false;
argv[i] = nullptr;
} else if (strcmp(argv[i], "--stress-deopt") == 0) {
options.stress_deopt = true;
argv[i] = nullptr;
} else if (strcmp(argv[i], "--stress-background-compile") == 0) {
options.stress_background_compile = true;
argv[i] = nullptr;
} else if (strcmp(argv[i], "--nostress-background-compile") == 0 ||
strcmp(argv[i], "--no-stress-background-compile") == 0) {
options.stress_background_compile = false;
argv[i] = nullptr;
} else if (strcmp(argv[i], "--mock-arraybuffer-allocator") == 0) {
options.mock_arraybuffer_allocator = true;
argv[i] = nullptr;
} else if (strcmp(argv[i], "--noalways-opt") == 0 ||
strcmp(argv[i], "--no-always-opt") == 0) {
// No support for stressing if we can't use --always-opt.
options.stress_opt = false;
options.stress_deopt = false;
} else if (strcmp(argv[i], "--logfile-per-isolate") == 0) {
logfile_per_isolate = true;
argv[i] = nullptr;
} else if (strcmp(argv[i], "--shell") == 0) {
options.interactive_shell = true;
argv[i] = nullptr;
} else if (strcmp(argv[i], "--test") == 0) {
options.test_shell = true;
argv[i] = nullptr;
} else if (strcmp(argv[i], "--notest") == 0 ||
strcmp(argv[i], "--no-test") == 0) {
options.test_shell = false;
argv[i] = nullptr;
} else if (strcmp(argv[i], "--send-idle-notification") == 0) {
options.send_idle_notification = true;
argv[i] = nullptr;
} else if (strcmp(argv[i], "--invoke-weak-callbacks") == 0) {
options.invoke_weak_callbacks = true;
// TODO(jochen) See issue 3351
options.send_idle_notification = true;
argv[i] = nullptr;
} else if (strcmp(argv[i], "--omit-quit") == 0) {
options.omit_quit = true;
argv[i] = nullptr;
} else if (strcmp(argv[i], "-f") == 0) {
// Ignore any -f flags for compatibility with other stand-alone
// JavaScript engines.
continue;
} else if (strcmp(argv[i], "--isolate") == 0) {
options.num_isolates++;
} else if (strcmp(argv[i], "--throws") == 0) {
options.expected_to_throw = true;
argv[i] = nullptr;
} else if (strncmp(argv[i], "--icu-data-file=", 16) == 0) {
options.icu_data_file = argv[i] + 16;
argv[i] = nullptr;
#ifdef V8_USE_EXTERNAL_STARTUP_DATA
} else if (strncmp(argv[i], "--natives_blob=", 15) == 0) {
options.natives_blob = argv[i] + 15;
argv[i] = nullptr;
} else if (strncmp(argv[i], "--snapshot_blob=", 16) == 0) {
options.snapshot_blob = argv[i] + 16;
argv[i] = nullptr;
#endif // V8_USE_EXTERNAL_STARTUP_DATA
} else if (strcmp(argv[i], "--cache") == 0 ||
strncmp(argv[i], "--cache=", 8) == 0) {
const char* value = argv[i] + 7;
if (!*value || strncmp(value, "=code", 6) == 0) {
options.compile_options = v8::ScriptCompiler::kNoCompileOptions;
options.code_cache_options =
ShellOptions::CodeCacheOptions::kProduceCache;
} else if (strncmp(value, "=parse", 7) == 0) {
options.compile_options = v8::ScriptCompiler::kProduceParserCache;
} else if (strncmp(value, "=none", 6) == 0) {
options.compile_options = v8::ScriptCompiler::kNoCompileOptions;
options.code_cache_options =
ShellOptions::CodeCacheOptions::kNoProduceCache;
} else if (strncmp(value, "=after-execute", 15) == 0) {
options.compile_options = v8::ScriptCompiler::kNoCompileOptions;
options.code_cache_options =
ShellOptions::CodeCacheOptions::kProduceCacheAfterExecute;
} else if (strncmp(value, "=full-code-cache", 17) == 0) {
options.compile_options = v8::ScriptCompiler::kEagerCompile;
options.code_cache_options =
ShellOptions::CodeCacheOptions::kProduceCache;
} else {
printf("Unknown option to --cache.\n");
return false;
}
argv[i] = nullptr;
} else if (strcmp(argv[i], "--enable-tracing") == 0) {
options.trace_enabled = true;
argv[i] = nullptr;
} else if (strncmp(argv[i], "--trace-path=", 13) == 0) {
options.trace_path = argv[i] + 13;
argv[i] = nullptr;
} else if (strncmp(argv[i], "--trace-config=", 15) == 0) {
options.trace_config = argv[i] + 15;
argv[i] = nullptr;
} else if (strcmp(argv[i], "--enable-inspector") == 0) {
options.enable_inspector = true;
argv[i] = nullptr;
} else if (strncmp(argv[i], "--lcov=", 7) == 0) {
options.lcov_file = argv[i] + 7;
argv[i] = nullptr;
} else if (strcmp(argv[i], "--disable-in-process-stack-traces") == 0) {
options.disable_in_process_stack_traces = true;
argv[i] = nullptr;
#ifdef V8_OS_POSIX
} else if (strncmp(argv[i], "--read-from-tcp-port=", 21) == 0) {
options.read_from_tcp_port = atoi(argv[i] + 21);
argv[i] = nullptr;
#endif // V8_OS_POSIX
} else if (strcmp(argv[i], "--enable-os-system") == 0) {
options.enable_os_system = true;
argv[i] = nullptr;
} else if (strcmp(argv[i], "--quiet-load") == 0) {
options.quiet_load = true;
argv[i] = nullptr;
}
}
v8::V8::SetFlagsFromCommandLine(&argc, argv, true);
// Set up isolated source groups.
options.isolate_sources = new SourceGroup[options.num_isolates];
SourceGroup* current = options.isolate_sources;
current->Begin(argv, 1);
for (int i = 1; i < argc; i++) {
const char* str = argv[i];
if (strcmp(str, "--isolate") == 0) {
current->End(i);
current++;
current->Begin(argv, i + 1);
} else if (strcmp(str, "--module") == 0) {
// Pass on to SourceGroup, which understands this option.
} else if (strncmp(argv[i], "--", 2) == 0) {
printf("Warning: unknown flag %s.\nTry --help for options\n", argv[i]);
} else if (strcmp(str, "-e") == 0 && i + 1 < argc) {
options.script_executed = true;
} else if (strncmp(str, "-", 1) != 0) {
// Not a flag, so it must be a script to execute.
options.script_executed = true;
}
}
current->End(argc);
if (!logfile_per_isolate && options.num_isolates) {
SetFlagsFromString("--nologfile_per_isolate");
}
return true;
}
int Shell::RunMain(Isolate* isolate, int argc, char* argv[], bool last_run) {
for (int i = 1; i < options.num_isolates; ++i) {
options.isolate_sources[i].StartExecuteInThread();
}
{
EnsureEventLoopInitialized(isolate);
if (options.lcov_file) {
debug::Coverage::SelectMode(isolate, debug::Coverage::kBlockCount);
}
HandleScope scope(isolate);
Local<Context> context = CreateEvaluationContext(isolate);
bool use_existing_context = last_run && options.use_interactive_shell();
if (use_existing_context) {
// Keep using the same context in the interactive shell.
evaluation_context_.Reset(isolate, context);
}
{
Context::Scope cscope(context);
InspectorClient inspector_client(context, options.enable_inspector);
PerIsolateData::RealmScope realm_scope(PerIsolateData::Get(isolate));
options.isolate_sources[0].Execute(isolate);
CompleteMessageLoop(isolate);
}
if (!use_existing_context) {
DisposeModuleEmbedderData(context);
}
WriteLcovData(isolate, options.lcov_file);
}
CollectGarbage(isolate);
for (int i = 1; i < options.num_isolates; ++i) {
if (last_run) {
options.isolate_sources[i].JoinThread();
} else {
options.isolate_sources[i].WaitForThread();
}
}
CleanupWorkers();
return 0;
}
void Shell::CollectGarbage(Isolate* isolate) {
if (options.send_idle_notification) {
const double kLongIdlePauseInSeconds = 1.0;
isolate->ContextDisposedNotification();
isolate->IdleNotificationDeadline(
g_platform->MonotonicallyIncreasingTime() + kLongIdlePauseInSeconds);
}
if (options.invoke_weak_callbacks) {
// By sending a low memory notifications, we will try hard to collect all
// garbage and will therefore also invoke all weak callbacks of actually
// unreachable persistent handles.
isolate->LowMemoryNotification();
}
}
void Shell::EnsureEventLoopInitialized(Isolate* isolate) {
v8::platform::EnsureEventLoopInitialized(GetDefaultPlatform(), isolate);
SetWaitUntilDone(isolate, false);
}
void Shell::SetWaitUntilDone(Isolate* isolate, bool value) {
base::LockGuard<base::Mutex> guard(isolate_status_lock_.Pointer());
if (isolate_status_.count(isolate) == 0) {
isolate_status_.insert(std::make_pair(isolate, value));
} else {
isolate_status_[isolate] = value;
}
}
namespace {
bool ProcessMessages(Isolate* isolate,
std::function<platform::MessageLoopBehavior()> behavior) {
Platform* platform = GetDefaultPlatform();
while (true) {
while (v8::platform::PumpMessageLoop(platform, isolate, behavior())) {
isolate->RunMicrotasks();
}
if (platform->IdleTasksEnabled(isolate)) {
v8::platform::RunIdleTasks(platform, isolate,
50.0 / base::Time::kMillisecondsPerSecond);
}
HandleScope handle_scope(isolate);
PerIsolateData* data = PerIsolateData::Get(isolate);
Local<Function> callback;
if (!data->GetTimeoutCallback().ToLocal(&callback)) break;
Local<Context> context;
if (!data->GetTimeoutContext().ToLocal(&context)) break;
TryCatch try_catch(isolate);
try_catch.SetVerbose(true);
Context::Scope context_scope(context);
if (callback->Call(context, Undefined(isolate), 0, nullptr).IsEmpty()) {
Shell::ReportException(isolate, &try_catch);
return false;
}
}
return true;
}
} // anonymous namespace
void Shell::CompleteMessageLoop(Isolate* isolate) {
ProcessMessages(isolate, [isolate]() {
base::LockGuard<base::Mutex> guard(isolate_status_lock_.Pointer());
DCHECK_GT(isolate_status_.count(isolate), 0);
return isolate_status_[isolate]
? platform::MessageLoopBehavior::kWaitForWork
: platform::MessageLoopBehavior::kDoNotWait;
});
}
bool Shell::EmptyMessageQueues(Isolate* isolate) {
return ProcessMessages(
isolate, []() { return platform::MessageLoopBehavior::kDoNotWait; });
}
class Serializer : public ValueSerializer::Delegate {
public:
explicit Serializer(Isolate* isolate)
: isolate_(isolate),
serializer_(isolate, this),
current_memory_usage_(0) {}
Maybe<bool> WriteValue(Local<Context> context, Local<Value> value,
Local<Value> transfer) {
bool ok;
DCHECK(!data_);
data_.reset(new SerializationData);
if (!PrepareTransfer(context, transfer).To(&ok)) {
return Nothing<bool>();
}
serializer_.WriteHeader();
if (!serializer_.WriteValue(context, value).To(&ok)) {
data_.reset();
return Nothing<bool>();
}
if (!FinalizeTransfer().To(&ok)) {
return Nothing<bool>();
}
std::pair<uint8_t*, size_t> pair = serializer_.Release();
data_->data_.reset(pair.first);
data_->size_ = pair.second;
return Just(true);
}
std::unique_ptr<SerializationData> Release() { return std::move(data_); }
protected:
// Implements ValueSerializer::Delegate.
void ThrowDataCloneError(Local<String> message) override {
isolate_->ThrowException(Exception::Error(message));
}
Maybe<uint32_t> GetSharedArrayBufferId(
Isolate* isolate, Local<SharedArrayBuffer> shared_array_buffer) override {
DCHECK_NOT_NULL(data_);
for (size_t index = 0; index < shared_array_buffers_.size(); ++index) {
if (shared_array_buffers_[index] == shared_array_buffer) {
return Just<uint32_t>(static_cast<uint32_t>(index));
}
}
size_t index = shared_array_buffers_.size();
shared_array_buffers_.emplace_back(isolate_, shared_array_buffer);
return Just<uint32_t>(static_cast<uint32_t>(index));
}
void* ReallocateBufferMemory(void* old_buffer, size_t size,
size_t* actual_size) override {
// Not accurate, because we don't take into account reallocated buffers,
// but this is fine for testing.
current_memory_usage_ += size;
if (current_memory_usage_ > kMaxSerializerMemoryUsage) return nullptr;
void* result = realloc(old_buffer, size);
*actual_size = result ? size : 0;
return result;
}
void FreeBufferMemory(void* buffer) override { free(buffer); }
private:
Maybe<bool> PrepareTransfer(Local<Context> context, Local<Value> transfer) {
if (transfer->IsArray()) {
Local<Array> transfer_array = Local<Array>::Cast(transfer);
uint32_t length = transfer_array->Length();
for (uint32_t i = 0; i < length; ++i) {
Local<Value> element;
if (transfer_array->Get(context, i).ToLocal(&element)) {
if (!element->IsArrayBuffer()) {
Throw(isolate_, "Transfer array elements must be an ArrayBuffer");
return Nothing<bool>();
}
Local<ArrayBuffer> array_buffer = Local<ArrayBuffer>::Cast(element);
serializer_.TransferArrayBuffer(
static_cast<uint32_t>(array_buffers_.size()), array_buffer);
array_buffers_.emplace_back(isolate_, array_buffer);
} else {
return Nothing<bool>();
}
}
return Just(true);
} else if (transfer->IsUndefined()) {
return Just(true);
} else {
Throw(isolate_, "Transfer list must be an Array or undefined");
return Nothing<bool>();
}
}
template <typename T>
typename T::Contents MaybeExternalize(Local<T> array_buffer) {
if (array_buffer->IsExternal()) {
return array_buffer->GetContents();
} else {
typename T::Contents contents = array_buffer->Externalize();
data_->externalized_contents_.emplace_back(contents);
return contents;
}
}
Maybe<bool> FinalizeTransfer() {
for (const auto& global_array_buffer : array_buffers_) {
Local<ArrayBuffer> array_buffer =
Local<ArrayBuffer>::New(isolate_, global_array_buffer);
if (!array_buffer->IsNeuterable()) {
Throw(isolate_, "ArrayBuffer could not be transferred");
return Nothing<bool>();
}
ArrayBuffer::Contents contents = MaybeExternalize(array_buffer);
array_buffer->Neuter();
data_->array_buffer_contents_.push_back(contents);
}
for (const auto& global_shared_array_buffer : shared_array_buffers_) {
Local<SharedArrayBuffer> shared_array_buffer =
Local<SharedArrayBuffer>::New(isolate_, global_shared_array_buffer);
data_->shared_array_buffer_contents_.push_back(
MaybeExternalize(shared_array_buffer));
}
return Just(true);
}
Isolate* isolate_;
ValueSerializer serializer_;
std::unique_ptr<SerializationData> data_;
std::vector<Global<ArrayBuffer>> array_buffers_;
std::vector<Global<SharedArrayBuffer>> shared_array_buffers_;
size_t current_memory_usage_;
DISALLOW_COPY_AND_ASSIGN(Serializer);
};
class Deserializer : public ValueDeserializer::Delegate {
public:
Deserializer(Isolate* isolate, std::unique_ptr<SerializationData> data)
: isolate_(isolate),
deserializer_(isolate, data->data(), data->size(), this),
data_(std::move(data)) {
deserializer_.SetSupportsLegacyWireFormat(true);
}
MaybeLocal<Value> ReadValue(Local<Context> context) {
bool read_header;
if (!deserializer_.ReadHeader(context).To(&read_header)) {
return MaybeLocal<Value>();
}
uint32_t index = 0;
for (const auto& contents : data_->array_buffer_contents()) {
Local<ArrayBuffer> array_buffer =
ArrayBuffer::New(isolate_, contents.Data(), contents.ByteLength());
deserializer_.TransferArrayBuffer(index++, array_buffer);
}
index = 0;
for (const auto& contents : data_->shared_array_buffer_contents()) {
Local<SharedArrayBuffer> shared_array_buffer = SharedArrayBuffer::New(
isolate_, contents.Data(), contents.ByteLength());
deserializer_.TransferSharedArrayBuffer(index++, shared_array_buffer);
}
return deserializer_.ReadValue(context);
}
private:
Isolate* isolate_;
ValueDeserializer deserializer_;
std::unique_ptr<SerializationData> data_;
DISALLOW_COPY_AND_ASSIGN(Deserializer);
};
std::unique_ptr<SerializationData> Shell::SerializeValue(
Isolate* isolate, Local<Value> value, Local<Value> transfer) {
bool ok;
Local<Context> context = isolate->GetCurrentContext();
Serializer serializer(isolate);
if (serializer.WriteValue(context, value, transfer).To(&ok)) {
std::unique_ptr<SerializationData> data = serializer.Release();
base::LockGuard<base::Mutex> lock_guard(workers_mutex_.Pointer());
data->AppendExternalizedContentsTo(&externalized_contents_);
return data;
}
return nullptr;
}
MaybeLocal<Value> Shell::DeserializeValue(
Isolate* isolate, std::unique_ptr<SerializationData> data) {
Local<Value> value;
Local<Context> context = isolate->GetCurrentContext();
Deserializer deserializer(isolate, std::move(data));
return deserializer.ReadValue(context);
}
void Shell::CleanupWorkers() {
// Make a copy of workers_, because we don't want to call Worker::Terminate
// while holding the workers_mutex_ lock. Otherwise, if a worker is about to
// create a new Worker, it would deadlock.
std::vector<Worker*> workers_copy;
{
base::LockGuard<base::Mutex> lock_guard(workers_mutex_.Pointer());
allow_new_workers_ = false;
workers_copy.swap(workers_);
}
for (Worker* worker : workers_copy) {
worker->WaitForThread();
delete worker;
}
// Now that all workers are terminated, we can re-enable Worker creation.
base::LockGuard<base::Mutex> lock_guard(workers_mutex_.Pointer());
allow_new_workers_ = true;
externalized_contents_.clear();
}
int Shell::Main(int argc, char* argv[]) {
std::ofstream trace_file;
#if (defined(_WIN32) || defined(_WIN64))
UINT new_flags =
SEM_FAILCRITICALERRORS | SEM_NOGPFAULTERRORBOX | SEM_NOOPENFILEERRORBOX;
UINT existing_flags = SetErrorMode(new_flags);
SetErrorMode(existing_flags | new_flags);
#if defined(_MSC_VER)
_CrtSetReportMode(_CRT_WARN, _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE);
_CrtSetReportFile(_CRT_WARN, _CRTDBG_FILE_STDERR);
_CrtSetReportMode(_CRT_ASSERT, _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE);
_CrtSetReportFile(_CRT_ASSERT, _CRTDBG_FILE_STDERR);
_CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_DEBUG | _CRTDBG_MODE_FILE);
_CrtSetReportFile(_CRT_ERROR, _CRTDBG_FILE_STDERR);
_set_error_mode(_OUT_TO_STDERR);
#endif // defined(_MSC_VER)
#endif // defined(_WIN32) || defined(_WIN64)
if (!SetOptions(argc, argv)) return 1;
v8::V8::InitializeICUDefaultLocation(argv[0], options.icu_data_file);
v8::platform::InProcessStackDumping in_process_stack_dumping =
options.disable_in_process_stack_traces
? v8::platform::InProcessStackDumping::kDisabled
: v8::platform::InProcessStackDumping::kEnabled;
std::unique_ptr<platform::tracing::TracingController> tracing;
if (options.trace_enabled && !i::FLAG_verify_predictable) {
tracing = base::make_unique<platform::tracing::TracingController>();
trace_file.open(options.trace_path ? options.trace_path : "v8_trace.json");
platform::tracing::TraceBuffer* trace_buffer =
platform::tracing::TraceBuffer::CreateTraceBufferRingBuffer(
platform::tracing::TraceBuffer::kRingBufferChunks,
platform::tracing::TraceWriter::CreateJSONTraceWriter(trace_file));
tracing->Initialize(trace_buffer);
}
platform::tracing::TracingController* tracing_controller = tracing.get();
g_platform = v8::platform::NewDefaultPlatform(
0, v8::platform::IdleTaskSupport::kEnabled, in_process_stack_dumping,
std::move(tracing));
if (i::FLAG_verify_predictable) {
g_platform.reset(new PredictablePlatform(std::move(g_platform)));
}
v8::V8::InitializePlatform(g_platform.get());
v8::V8::Initialize();
if (options.natives_blob || options.snapshot_blob) {
v8::V8::InitializeExternalStartupData(options.natives_blob,
options.snapshot_blob);
} else {
v8::V8::InitializeExternalStartupData(argv[0]);
}
SetFlagsFromString("--trace-turbo-cfg-file=turbo.cfg");
SetFlagsFromString("--redirect-code-traces-to=code.asm");
int result = 0;
Isolate::CreateParams create_params;
ShellArrayBufferAllocator shell_array_buffer_allocator;
MockArrayBufferAllocator mock_arraybuffer_allocator;
if (options.mock_arraybuffer_allocator) {
Shell::array_buffer_allocator = &mock_arraybuffer_allocator;
} else {
Shell::array_buffer_allocator = &shell_array_buffer_allocator;
}
create_params.array_buffer_allocator = Shell::array_buffer_allocator;
#ifdef ENABLE_VTUNE_JIT_INTERFACE
create_params.code_event_handler = vTune::GetVtuneCodeEventHandler();
#endif
create_params.constraints.ConfigureDefaults(
base::SysInfo::AmountOfPhysicalMemory(),
base::SysInfo::AmountOfVirtualMemory());
Shell::counter_map_ = new CounterMap();
if (i::FLAG_dump_counters || i::FLAG_dump_counters_nvp || i::FLAG_gc_stats) {
create_params.counter_lookup_callback = LookupCounter;
create_params.create_histogram_callback = CreateHistogram;
create_params.add_histogram_sample_callback = AddHistogramSample;
}
if (i::trap_handler::IsTrapHandlerEnabled()) {
if (!v8::V8::RegisterDefaultSignalHandler()) {
fprintf(stderr, "Could not register signal handler");
exit(1);
}
}
Isolate* isolate = Isolate::New(create_params);
isolate->SetHostImportModuleDynamicallyCallback(
Shell::HostImportModuleDynamically);
isolate->SetHostInitializeImportMetaObjectCallback(
Shell::HostInitializeImportMetaObject);
D8Console console(isolate);
{
Isolate::Scope scope(isolate);
Initialize(isolate);
PerIsolateData data(isolate);
debug::SetConsoleDelegate(isolate, &console);
if (options.trace_enabled) {
platform::tracing::TraceConfig* trace_config;
if (options.trace_config) {
int size = 0;
char* trace_config_json_str = ReadChars(options.trace_config, &size);
trace_config =
tracing::CreateTraceConfigFromJSON(isolate, trace_config_json_str);
delete[] trace_config_json_str;
} else {
trace_config =
platform::tracing::TraceConfig::CreateDefaultTraceConfig();
}
tracing_controller->StartTracing(trace_config);
}
if (options.stress_opt || options.stress_deopt) {
Testing::SetStressRunType(options.stress_opt
? Testing::kStressTypeOpt
: Testing::kStressTypeDeopt);
options.stress_runs = Testing::GetStressRuns();
for (int i = 0; i < options.stress_runs && result == 0; i++) {
printf("============ Stress %d/%d ============\n", i + 1,
options.stress_runs);
Testing::PrepareStressRun(i);
bool last_run = i == options.stress_runs - 1;
result = RunMain(isolate, argc, argv, last_run);
}
printf("======== Full Deoptimization =======\n");
Testing::DeoptimizeAll(isolate);
} else if (i::FLAG_stress_runs > 0) {
options.stress_runs = i::FLAG_stress_runs;
for (int i = 0; i < options.stress_runs && result == 0; i++) {
printf("============ Run %d/%d ============\n", i + 1,
options.stress_runs);
bool last_run = i == options.stress_runs - 1;
result = RunMain(isolate, argc, argv, last_run);
}
} else if (options.code_cache_options !=
ShellOptions::CodeCacheOptions::kNoProduceCache) {
printf("============ Run: Produce code cache ============\n");
// First run to produce the cache
result = RunMain(isolate, argc, argv, false);
// Change the options to consume cache
if (options.compile_options == v8::ScriptCompiler::kProduceParserCache) {
options.compile_options = v8::ScriptCompiler::kConsumeParserCache;
} else {
DCHECK(options.compile_options == v8::ScriptCompiler::kEagerCompile ||
options.compile_options ==
v8::ScriptCompiler::kNoCompileOptions);
options.compile_options = v8::ScriptCompiler::kConsumeCodeCache;
}
printf("============ Run: Consume code cache ============\n");
// Second run to consume the cache in new isolate
Isolate::CreateParams create_params;
create_params.array_buffer_allocator = Shell::array_buffer_allocator;
i::FLAG_hash_seed ^= 1337; // Use a different hash seed.
Isolate* isolate2 = Isolate::New(create_params);
i::FLAG_hash_seed ^= 1337; // Restore old hash seed.
isolate2->SetHostImportModuleDynamicallyCallback(
Shell::HostImportModuleDynamically);
isolate2->SetHostInitializeImportMetaObjectCallback(
Shell::HostInitializeImportMetaObject);
{
D8Console console(isolate2);
debug::SetConsoleDelegate(isolate2, &console);
PerIsolateData data(isolate2);
Isolate::Scope isolate_scope(isolate2);
result = RunMain(isolate2, argc, argv, true);
}
isolate2->Dispose();
} else {
bool last_run = true;
result = RunMain(isolate, argc, argv, last_run);
}
// Run interactive shell if explicitly requested or if no script has been
// executed, but never on --test
if (options.use_interactive_shell()) {
RunShell(isolate);
}
if (i::FLAG_trace_ignition_dispatches &&
i::FLAG_trace_ignition_dispatches_output_file != nullptr) {
WriteIgnitionDispatchCountersFile(isolate);
}
// Shut down contexts and collect garbage.
cached_code_map_.clear();
evaluation_context_.Reset();
stringify_function_.Reset();
CollectGarbage(isolate);
}
OnExit(isolate);
V8::Dispose();
V8::ShutdownPlatform();
// Delete the platform explicitly here to write the tracing output to the
// tracing file.
g_platform.reset();
return result;
}
} // namespace v8
#ifndef GOOGLE3
int main(int argc, char* argv[]) {
return v8::Shell::Main(argc, argv);
}
#endif
#undef CHECK
#undef DCHECK