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chromium / v8 / v8 / dc9ed94efdac30bdbe88e81f4cf08783c1dc952f / . / src / d8 / d8.cc
blob: c36b255e6054551e9175e212890724d6be516fcc [file] [log] [blame]
// 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 <iomanip>
#include <iterator>
#include <string>
#include <tuple>
#include <type_traits>
#include <unordered_map>
#include <utility>
#include <vector>
#ifdef ENABLE_VTUNE_JIT_INTERFACE
#include "src/third_party/vtune/v8-vtune.h"
#endif
#include "include/libplatform/libplatform.h"
#include "include/libplatform/v8-tracing.h"
#include "include/v8-function.h"
#include "include/v8-initialization.h"
#include "include/v8-inspector.h"
#include "include/v8-json.h"
#include "include/v8-locker.h"
#include "include/v8-profiler.h"
#include "include/v8-wasm.h"
#include "src/api/api-inl.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/platform/wrappers.h"
#include "src/base/sanitizer/msan.h"
#include "src/base/sys-info.h"
#include "src/base/utils/random-number-generator.h"
#include "src/d8/d8-console.h"
#include "src/d8/d8-platforms.h"
#include "src/d8/d8.h"
#include "src/debug/debug-interface.h"
#include "src/deoptimizer/deoptimizer.h"
#include "src/diagnostics/basic-block-profiler.h"
#include "src/execution/v8threads.h"
#include "src/execution/vm-state-inl.h"
#include "src/flags/flags.h"
#include "src/handles/maybe-handles.h"
#include "src/heap/parked-scope.h"
#include "src/init/v8.h"
#include "src/interpreter/interpreter.h"
#include "src/logging/counters.h"
#include "src/logging/log-utils.h"
#include "src/objects/managed-inl.h"
#include "src/objects/objects-inl.h"
#include "src/objects/objects.h"
#include "src/parsing/parse-info.h"
#include "src/parsing/parsing.h"
#include "src/parsing/scanner-character-streams.h"
#include "src/profiler/profile-generator.h"
#include "src/snapshot/snapshot.h"
#include "src/tasks/cancelable-task.h"
#include "src/trap-handler/trap-handler.h"
#include "src/utils/ostreams.h"
#include "src/utils/utils.h"
#include "src/web-snapshot/web-snapshot.h"
#ifdef V8_FUZZILLI
#include "src/d8/cov.h"
#endif // V8_FUZZILLI
#ifdef V8_USE_PERFETTO
#include "perfetto/tracing.h"
#endif // V8_USE_PERFETTO
#ifdef V8_INTL_SUPPORT
#include "unicode/locid.h"
#endif // V8_INTL_SUPPORT
#ifdef V8_OS_LINUX
#include <sys/mman.h> // For MultiMappedAllocator.
#endif
#if !defined(_WIN32) && !defined(_WIN64)
#include <unistd.h>
#else
#include <windows.h>
#endif // !defined(_WIN32) && !defined(_WIN64)
#ifndef DCHECK
#define DCHECK(condition) assert(condition)
#endif
#ifndef CHECK
#define CHECK(condition) assert(condition)
#endif
#define TRACE_BS(...) \
do { \
if (i::FLAG_trace_backing_store) PrintF(__VA_ARGS__); \
} while (false)
namespace v8 {
namespace {
const int kMB = 1024 * 1024;
#ifdef V8_FUZZILLI
// REPRL = read-eval-print-reset-loop
// These file descriptors are being opened when Fuzzilli uses fork & execve to
// run V8.
#define REPRL_CRFD 100 // Control read file decriptor
#define REPRL_CWFD 101 // Control write file decriptor
#define REPRL_DRFD 102 // Data read file decriptor
#define REPRL_DWFD 103 // Data write file decriptor
bool fuzzilli_reprl = true;
#else
bool fuzzilli_reprl = false;
#endif // V8_FUZZILLI
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);
}
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);
}
}
private:
static constexpr size_t kVMThreshold = 65536;
void* AllocateVM(size_t length) {
DCHECK_LE(kVMThreshold, length);
v8::PageAllocator* page_allocator = i::GetArrayBufferPageAllocator();
size_t page_size = page_allocator->AllocatePageSize();
size_t allocated = RoundUp(length, page_size);
return i::AllocatePages(page_allocator, nullptr, allocated, page_size,
PageAllocator::kReadWrite);
}
void FreeVM(void* data, size_t length) {
v8::PageAllocator* page_allocator = i::GetArrayBufferPageAllocator();
size_t page_size = page_allocator->AllocatePageSize();
size_t allocated = RoundUp(length, page_size);
i::FreePages(page_allocator, data, allocated);
}
};
// ArrayBuffer allocator that never allocates over 10MB.
class MockArrayBufferAllocator : public ArrayBufferAllocatorBase {
protected:
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));
}
private:
size_t Adjust(size_t length) {
const size_t kAllocationLimit = 10 * kMB;
return length > kAllocationLimit ? i::AllocatePageSize() : length;
}
};
// ArrayBuffer allocator that can be equipped with a limit to simulate system
// OOM.
class MockArrayBufferAllocatiorWithLimit : public MockArrayBufferAllocator {
public:
explicit MockArrayBufferAllocatiorWithLimit(size_t allocation_limit)
: space_left_(allocation_limit) {}
protected:
void* Allocate(size_t length) override {
if (length > space_left_) {
return nullptr;
}
space_left_ -= length;
return MockArrayBufferAllocator::Allocate(length);
}
void* AllocateUninitialized(size_t length) override {
if (length > space_left_) {
return nullptr;
}
space_left_ -= length;
return MockArrayBufferAllocator::AllocateUninitialized(length);
}
void Free(void* data, size_t length) override {
space_left_ += length;
return MockArrayBufferAllocator::Free(data, length);
}
private:
std::atomic<size_t> space_left_;
};
#if MULTI_MAPPED_ALLOCATOR_AVAILABLE
// This is a mock allocator variant that provides a huge virtual allocation
// backed by a small real allocation that is repeatedly mapped. If you create an
// array on memory allocated by this allocator, you will observe that elements
// will alias each other as if their indices were modulo-divided by the real
// allocation length.
// The purpose is to allow stability-testing of huge (typed) arrays without
// actually consuming huge amounts of physical memory.
// This is currently only available on Linux because it relies on {mremap}.
class MultiMappedAllocator : public ArrayBufferAllocatorBase {
protected:
void* Allocate(size_t length) override {
if (length < kChunkSize) {
return ArrayBufferAllocatorBase::Allocate(length);
}
// We use mmap, which initializes pages to zero anyway.
return AllocateUninitialized(length);
}
void* AllocateUninitialized(size_t length) override {
if (length < kChunkSize) {
return ArrayBufferAllocatorBase::AllocateUninitialized(length);
}
size_t rounded_length = RoundUp(length, kChunkSize);
int prot = PROT_READ | PROT_WRITE;
// We have to specify MAP_SHARED to make {mremap} below do what we want.
int flags = MAP_SHARED | MAP_ANONYMOUS;
void* real_alloc = mmap(nullptr, kChunkSize, prot, flags, -1, 0);
if (reinterpret_cast<intptr_t>(real_alloc) == -1) {
// If we ran into some limit (physical or virtual memory, or number
// of mappings, etc), return {nullptr}, which callers can handle.
if (errno == ENOMEM) {
return nullptr;
}
// Other errors may be bugs which we want to learn about.
FATAL("mmap (real) failed with error %d: %s", errno, strerror(errno));
}
void* virtual_alloc =
mmap(nullptr, rounded_length, prot, flags | MAP_NORESERVE, -1, 0);
if (reinterpret_cast<intptr_t>(virtual_alloc) == -1) {
if (errno == ENOMEM) {
// Undo earlier, successful mappings.
munmap(real_alloc, kChunkSize);
return nullptr;
}
FATAL("mmap (virtual) failed with error %d: %s", errno, strerror(errno));
}
i::Address virtual_base = reinterpret_cast<i::Address>(virtual_alloc);
i::Address virtual_end = virtual_base + rounded_length;
for (i::Address to_map = virtual_base; to_map < virtual_end;
to_map += kChunkSize) {
// Specifying 0 as the "old size" causes the existing map entry to not
// get deleted, which is important so that we can remap it again in the
// next iteration of this loop.
void* result =
mremap(real_alloc, 0, kChunkSize, MREMAP_MAYMOVE | MREMAP_FIXED,
reinterpret_cast<void*>(to_map));
if (reinterpret_cast<intptr_t>(result) == -1) {
if (errno == ENOMEM) {
// Undo earlier, successful mappings.
munmap(real_alloc, kChunkSize);
munmap(virtual_alloc, (to_map - virtual_base));
return nullptr;
}
FATAL("mremap failed with error %d: %s", errno, strerror(errno));
}
}
base::MutexGuard lock_guard(&regions_mutex_);
regions_[virtual_alloc] = real_alloc;
return virtual_alloc;
}
void Free(void* data, size_t length) override {
if (length < kChunkSize) {
return ArrayBufferAllocatorBase::Free(data, length);
}
base::MutexGuard lock_guard(&regions_mutex_);
void* real_alloc = regions_[data];
munmap(real_alloc, kChunkSize);
size_t rounded_length = RoundUp(length, kChunkSize);
munmap(data, rounded_length);
regions_.erase(data);
}
private:
// Aiming for a "Huge Page" (2M on Linux x64) to go easy on the TLB.
static constexpr size_t kChunkSize = 2 * 1024 * 1024;
std::unordered_map<void*, void*> regions_;
base::Mutex regions_mutex_;
};
#endif // MULTI_MAPPED_ALLOCATOR_AVAILABLE
v8::Platform* g_default_platform;
std::unique_ptr<v8::Platform> g_platform;
static MaybeLocal<Value> TryGetValue(v8::Isolate* isolate,
Local<Context> context,
Local<v8::Object> object,
const char* property) {
MaybeLocal<String> v8_str = String::NewFromUtf8(isolate, property);
if (v8_str.IsEmpty()) return {};
return object->Get(context, v8_str.ToLocalChecked());
}
static Local<Value> GetValue(v8::Isolate* isolate, Local<Context> context,
Local<v8::Object> object, const char* property) {
return TryGetValue(isolate, context, object, property).ToLocalChecked();
}
std::shared_ptr<Worker> GetWorkerFromInternalField(Isolate* isolate,
Local<Object> object) {
if (object->InternalFieldCount() != 1) {
isolate->ThrowError("this is not a Worker");
return nullptr;
}
i::Handle<i::Object> handle = Utils::OpenHandle(*object->GetInternalField(0));
if (handle->IsSmi()) {
isolate->ThrowError("Worker is defunct because main thread is terminating");
return nullptr;
}
auto managed = i::Handle<i::Managed<Worker>>::cast(handle);
return managed->get();
}
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 {
static constexpr 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).ToLocalChecked();
Local<Value> result = JSON::Parse(context, source).ToLocalChecked();
Local<v8::Object> trace_config_object = result.As<v8::Object>();
UpdateIncludedCategoriesList(isolate, context, trace_config_object,
trace_config);
}
private:
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 = value.As<Array>();
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;
}
};
} // 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 ExternalOwningOneByteStringResource
: public String::ExternalOneByteStringResource {
public:
ExternalOwningOneByteStringResource() = default;
ExternalOwningOneByteStringResource(
std::unique_ptr<base::OS::MemoryMappedFile> file)
: file_(std::move(file)) {}
const char* data() const override {
return static_cast<char*>(file_->memory());
}
size_t length() const override { return file_->size(); }
private:
std::unique_ptr<base::OS::MemoryMappedFile> file_;
};
// static variables:
CounterMap* Shell::counter_map_;
base::SharedMutex Shell::counter_mutex_;
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::Now();
Global<Function> Shell::stringify_function_;
base::LazyMutex Shell::workers_mutex_;
bool Shell::allow_new_workers_ = true;
std::unordered_set<std::shared_ptr<Worker>> Shell::running_workers_;
std::atomic<bool> Shell::script_executed_{false};
std::atomic<bool> Shell::valid_fuzz_script_{false};
base::LazyMutex Shell::isolate_status_lock_;
std::map<v8::Isolate*, bool> Shell::isolate_status_;
std::map<v8::Isolate*, int> Shell::isolate_running_streaming_tasks_;
base::LazyMutex Shell::cached_code_mutex_;
std::map<std::string, std::unique_ptr<ScriptCompiler::CachedData>>
Shell::cached_code_map_;
std::atomic<int> Shell::unhandled_promise_rejections_{0};
Global<Context> Shell::evaluation_context_;
ArrayBuffer::Allocator* Shell::array_buffer_allocator;
Isolate* Shell::shared_isolate = nullptr;
bool check_d8_flag_contradictions = true;
ShellOptions Shell::options;
base::OnceType Shell::quit_once_ = V8_ONCE_INIT;
ScriptCompiler::CachedData* Shell::LookupCodeCache(Isolate* isolate,
Local<Value> source) {
base::MutexGuard 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::MutexGuard 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));
}
// Dummy external source stream which returns the whole source in one go.
// TODO(leszeks): Also test chunking the data.
class DummySourceStream : public v8::ScriptCompiler::ExternalSourceStream {
public:
explicit DummySourceStream(Local<String> source) : done_(false) {
source_buffer_ = Utils::OpenHandle(*source)->ToCString(
i::ALLOW_NULLS, i::FAST_STRING_TRAVERSAL, &source_length_);
}
size_t GetMoreData(const uint8_t** src) override {
if (done_) {
return 0;
}
*src = reinterpret_cast<uint8_t*>(source_buffer_.release());
done_ = true;
return source_length_;
}
private:
int source_length_;
std::unique_ptr<char[]> source_buffer_;
bool done_;
};
class StreamingCompileTask final : public v8::Task {
public:
StreamingCompileTask(Isolate* isolate,
v8::ScriptCompiler::StreamedSource* streamed_source,
v8::ScriptType type)
: isolate_(isolate),
script_streaming_task_(v8::ScriptCompiler::StartStreaming(
isolate, streamed_source, type)) {
Shell::NotifyStartStreamingTask(isolate_);
}
void Run() override {
script_streaming_task_->Run();
// Signal that the task has finished using the task runner to wake the
// message loop.
Shell::PostForegroundTask(isolate_, std::make_unique<FinishTask>(isolate_));
}
private:
class FinishTask final : public v8::Task {
public:
explicit FinishTask(Isolate* isolate) : isolate_(isolate) {}
void Run() final { Shell::NotifyFinishStreamingTask(isolate_); }
Isolate* isolate_;
};
Isolate* isolate_;
std::unique_ptr<v8::ScriptCompiler::ScriptStreamingTask>
script_streaming_task_;
};
namespace {
template <class T>
MaybeLocal<T> CompileStreamed(Local<Context> context,
ScriptCompiler::StreamedSource* v8_source,
Local<String> full_source_string,
const ScriptOrigin& origin) {}
template <>
MaybeLocal<Script> CompileStreamed(Local<Context> context,
ScriptCompiler::StreamedSource* v8_source,
Local<String> full_source_string,
const ScriptOrigin& origin) {
return ScriptCompiler::Compile(context, v8_source, full_source_string,
origin);
}
template <>
MaybeLocal<Module> CompileStreamed(Local<Context> context,
ScriptCompiler::StreamedSource* v8_source,
Local<String> full_source_string,
const ScriptOrigin& origin) {
return ScriptCompiler::CompileModule(context, v8_source, full_source_string,
origin);
}
template <class T>
MaybeLocal<T> Compile(Local<Context> context, ScriptCompiler::Source* source,
ScriptCompiler::CompileOptions options) {}
template <>
MaybeLocal<Script> Compile(Local<Context> context,
ScriptCompiler::Source* source,
ScriptCompiler::CompileOptions options) {
return ScriptCompiler::Compile(context, source, options);
}
template <>
MaybeLocal<Module> Compile(Local<Context> context,
ScriptCompiler::Source* source,
ScriptCompiler::CompileOptions options) {
return ScriptCompiler::CompileModule(context->GetIsolate(), source, options);
}
} // namespace
template <class T>
MaybeLocal<T> Shell::CompileString(Isolate* isolate, Local<Context> context,
Local<String> source,
const ScriptOrigin& origin) {
if (options.streaming_compile) {
v8::ScriptCompiler::StreamedSource streamed_source(
std::make_unique<DummySourceStream>(source),
v8::ScriptCompiler::StreamedSource::UTF8);
PostBlockingBackgroundTask(std::make_unique<StreamingCompileTask>(
isolate, &streamed_source,
std::is_same<T, Module>::value ? v8::ScriptType::kModule
: v8::ScriptType::kClassic));
// Pump the loop until the streaming task completes.
Shell::CompleteMessageLoop(isolate);
return CompileStreamed<T>(context, &streamed_source, source, origin);
}
ScriptCompiler::CachedData* cached_code = nullptr;
if (options.compile_options == ScriptCompiler::kConsumeCodeCache) {
cached_code = LookupCodeCache(isolate, source);
}
ScriptCompiler::Source script_source(source, origin, cached_code);
MaybeLocal<T> result =
Compile<T>(context, &script_source,
cached_code ? ScriptCompiler::kConsumeCodeCache
: ScriptCompiler::kNoCompileOptions);
if (cached_code) CHECK(!cached_code->rejected);
return result;
}
namespace {
// For testing.
const int kHostDefinedOptionsLength = 2;
const uint32_t kHostDefinedOptionsMagicConstant = 0xF1F2F3F0;
ScriptOrigin CreateScriptOrigin(Isolate* isolate, Local<String> resource_name,
v8::ScriptType type) {
Local<PrimitiveArray> options =
PrimitiveArray::New(isolate, kHostDefinedOptionsLength);
options->Set(isolate, 0,
v8::Uint32::New(isolate, kHostDefinedOptionsMagicConstant));
options->Set(isolate, 1, resource_name);
return ScriptOrigin(isolate, resource_name, 0, 0, false, -1, Local<Value>(),
false, false, type == v8::ScriptType::kModule, options);
}
bool IsValidHostDefinedOptions(Local<Context> context, Local<Data> options,
Local<Value> resource_name) {
if (!options->IsFixedArray()) return false;
Local<FixedArray> array = options.As<FixedArray>();
if (array->Length() != kHostDefinedOptionsLength) return false;
uint32_t magic = 0;
if (!array->Get(context, 0).As<Value>()->Uint32Value(context).To(&magic)) {
return false;
}
if (magic != kHostDefinedOptionsMagicConstant) return false;
return array->Get(context, 1).As<String>()->StrictEquals(resource_name);
}
} // namespace
// Executes a string within the current v8 context.
bool Shell::ExecuteString(Isolate* isolate, Local<String> source,
Local<String> name, PrintResult print_result,
ReportExceptions report_exceptions,
ProcessMessageQueue process_message_queue) {
i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
if (i::FLAG_parse_only) {
i::VMState<PARSER> state(i_isolate);
i::Handle<i::String> str = Utils::OpenHandle(*(source));
// Set up ParseInfo.
i::UnoptimizedCompileState compile_state;
i::ReusableUnoptimizedCompileState reusable_state(i_isolate);
i::UnoptimizedCompileFlags flags =
i::UnoptimizedCompileFlags::ForToplevelCompile(
i_isolate, true, i::construct_language_mode(i::FLAG_use_strict),
i::REPLMode::kNo, ScriptType::kClassic, i::FLAG_lazy);
if (options.compile_options == v8::ScriptCompiler::kEagerCompile) {
flags.set_is_eager(true);
}
i::ParseInfo parse_info(i_isolate, flags, &compile_state, &reusable_state);
i::Handle<i::Script> script = parse_info.CreateScript(
i_isolate, str, i::kNullMaybeHandle, ScriptOriginOptions());
if (!i::parsing::ParseProgram(&parse_info, script, i_isolate,
i::parsing::ReportStatisticsMode::kYes)) {
parse_info.pending_error_handler()->PrepareErrors(
i_isolate, parse_info.ast_value_factory());
parse_info.pending_error_handler()->ReportErrors(i_isolate, script);
fprintf(stderr, "Failed parsing\n");
return false;
}
return true;
}
HandleScope handle_scope(isolate);
TryCatch try_catch(isolate);
try_catch.SetVerbose(report_exceptions == kReportExceptions);
// Explicitly check for stack overflows. This method can be called
// recursively, and since we consume quite some stack space for the C++
// frames, the stack check in the called frame might be too late.
if (i::StackLimitCheck{i_isolate}.HasOverflowed()) {
i_isolate->StackOverflow();
i_isolate->OptionalRescheduleException(false);
return false;
}
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);
Local<Context> context(isolate->GetCurrentContext());
ScriptOrigin origin =
CreateScriptOrigin(isolate, name, ScriptType::kClassic);
for (int i = 1; i < options.repeat_compile; ++i) {
HandleScope handle_scope_for_compiling(isolate);
if (CompileString<Script>(isolate, context, source, origin).IsEmpty()) {
return false;
}
}
Local<Script> script;
if (!CompileString<Script>(isolate, context, source, origin)
.ToLocal(&script)) {
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());
StoreInCodeCache(isolate, source, cached_data);
delete cached_data;
}
if (options.compile_only) return true;
if (options.compile_options == ScriptCompiler::kConsumeCodeCache) {
i::Handle<i::Script> i_script(
i::Script::cast(Utils::OpenHandle(*script)->shared().script()),
i_isolate);
// TODO(cbruni, chromium:1244145): remove once context-allocated.
i_script->set_host_defined_options(i::FixedArray::cast(
*Utils::OpenHandle(*(origin.GetHostDefinedOptions()))));
}
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());
StoreInCodeCache(isolate, source, cached_data);
delete cached_data;
}
if (process_message_queue) {
if (!EmptyMessageQueues(isolate)) success = false;
if (!HandleUnhandledPromiseRejections(isolate)) success = false;
}
data->realm_current_ = data->realm_switch_;
if (options.web_snapshot_config) {
const char* web_snapshot_output_file_name = "web.snap";
if (options.web_snapshot_output) {
web_snapshot_output_file_name = options.web_snapshot_output;
}
MaybeLocal<PrimitiveArray> maybe_exports =
ReadLines(isolate, options.web_snapshot_config);
Local<PrimitiveArray> exports;
if (!maybe_exports.ToLocal(&exports)) {
isolate->ThrowError("Web snapshots: unable to read config");
CHECK(try_catch.HasCaught());
ReportException(isolate, &try_catch);
return false;
}
i::WebSnapshotSerializer serializer(isolate);
i::WebSnapshotData snapshot_data;
if (serializer.TakeSnapshot(context, exports, snapshot_data)) {
DCHECK_NOT_NULL(snapshot_data.buffer);
WriteChars(web_snapshot_output_file_name, snapshot_data.buffer,
snapshot_data.buffer_size);
} else {
CHECK(try_catch.HasCaught());
return false;
}
} else if (options.web_snapshot_output) {
isolate->ThrowError(
"Web snapshots: --web-snapshot-config is needed when "
"--web-snapshot-output is passed");
}
}
Local<Value> result;
if (!maybe_result.ToLocal(&result)) {
DCHECK(try_catch.HasCaught());
return false;
}
// It's possible that a FinalizationRegistry cleanup task threw an error.
if (try_catch.HasCaught()) success = false;
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)
// 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];
// Unicode paths are unsupported, which is fine as long as
// the test directory doesn't include any such 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 absolute_path;
if (IsAbsolutePath(path)) {
absolute_path = path;
} else {
absolute_path = dir_name + '/' + path;
}
std::replace(absolute_path.begin(), absolute_path.end(), '\\', '/');
std::vector<std::string> segments;
std::istringstream segment_stream(absolute_path);
std::string segment;
while (std::getline(segment_stream, segment, '/')) {
if (segment == "..") {
if (!segments.empty()) segments.pop_back();
} else if (segment != ".") {
segments.push_back(segment);
}
}
// Join path segments.
std::ostringstream os;
if (segments.size() > 1) {
std::copy(segments.begin(), segments.end() - 1,
std::ostream_iterator<std::string>(os, "/"));
os << *segments.rbegin();
} else {
os << "/";
if (!segments.empty()) os << segments[0];
}
return os.str();
}
// 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)),
json_module_to_parsed_json_map(10, ModuleGlobalHash(isolate)) {}
static ModuleType ModuleTypeFromImportAssertions(
Local<Context> context, Local<FixedArray> import_assertions,
bool hasPositions) {
Isolate* isolate = context->GetIsolate();
const int kV8AssertionEntrySize = hasPositions ? 3 : 2;
for (int i = 0; i < import_assertions->Length();
i += kV8AssertionEntrySize) {
Local<String> v8_assertion_key =
import_assertions->Get(context, i).As<v8::String>();
std::string assertion_key = ToSTLString(isolate, v8_assertion_key);
if (assertion_key == "type") {
Local<String> v8_assertion_value =
import_assertions->Get(context, i + 1).As<String>();
std::string assertion_value = ToSTLString(isolate, v8_assertion_value);
if (assertion_value == "json") {
return ModuleType::kJSON;
} else {
// JSON is currently the only supported non-JS type
return ModuleType::kInvalid;
}
}
}
// If no type is asserted, default to JS.
return ModuleType::kJavaScript;
}
// Map from (normalized module specifier, module type) pair to Module.
std::map<std::pair<std::string, ModuleType>, Global<Module>> 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;
// Map from JSON Module to its parsed content, for use in module
// JSONModuleEvaluationSteps
std::unordered_map<Global<Module>, Global<Value>, ModuleGlobalHash>
json_module_to_parsed_json_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<FixedArray> import_assertions,
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));
ModuleType module_type = ModuleEmbedderData::ModuleTypeFromImportAssertions(
context, import_assertions, true);
auto module_it =
d->module_map.find(std::make_pair(absolute_path, module_type));
CHECK(module_it != d->module_map.end());
return module_it->second.Get(isolate);
}
} // anonymous namespace
MaybeLocal<Module> Shell::FetchModuleTree(Local<Module> referrer,
Local<Context> context,
const std::string& file_name,
ModuleType module_type) {
DCHECK(IsAbsolutePath(file_name));
Isolate* isolate = context->GetIsolate();
Local<String> source_text = ReadFile(isolate, file_name.c_str(), false);
if (source_text.IsEmpty() && options.fuzzy_module_file_extensions) {
std::string fallback_file_name = file_name + ".js";
source_text = ReadFile(isolate, fallback_file_name.c_str(), false);
if (source_text.IsEmpty()) {
fallback_file_name = file_name + ".mjs";
source_text = ReadFile(isolate, fallback_file_name.c_str());
}
}
ModuleEmbedderData* d = GetModuleDataFromContext(context);
if (source_text.IsEmpty()) {
std::string msg = "d8: Error reading module from " + file_name;
if (!referrer.IsEmpty()) {
auto specifier_it =
d->module_to_specifier_map.find(Global<Module>(isolate, referrer));
CHECK(specifier_it != d->module_to_specifier_map.end());
msg += "\n imported by " + specifier_it->second;
}
isolate->ThrowError(
v8::String::NewFromUtf8(isolate, msg.c_str()).ToLocalChecked());
return MaybeLocal<Module>();
}
Local<String> resource_name =
String::NewFromUtf8(isolate, file_name.c_str()).ToLocalChecked();
ScriptOrigin origin =
CreateScriptOrigin(isolate, resource_name, ScriptType::kModule);
Local<Module> module;
if (module_type == ModuleType::kJavaScript) {
ScriptCompiler::Source source(source_text, origin);
if (!CompileString<Module>(isolate, context, source_text, origin)
.ToLocal(&module)) {
return MaybeLocal<Module>();
}
} else if (module_type == ModuleType::kJSON) {
Local<Value> parsed_json;
if (!v8::JSON::Parse(context, source_text).ToLocal(&parsed_json)) {
return MaybeLocal<Module>();
}
std::vector<Local<String>> export_names{
String::NewFromUtf8(isolate, "default").ToLocalChecked()};
module = v8::Module::CreateSyntheticModule(
isolate,
String::NewFromUtf8(isolate, file_name.c_str()).ToLocalChecked(),
export_names, Shell::JSONModuleEvaluationSteps);
CHECK(d->json_module_to_parsed_json_map
.insert(std::make_pair(Global<Module>(isolate, module),
Global<Value>(isolate, parsed_json)))
.second);
} else {
UNREACHABLE();
}
CHECK(d->module_map
.insert(std::make_pair(std::make_pair(file_name, module_type),
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);
Local<FixedArray> module_requests = module->GetModuleRequests();
for (int i = 0, length = module_requests->Length(); i < length; ++i) {
Local<ModuleRequest> module_request =
module_requests->Get(context, i).As<ModuleRequest>();
Local<String> name = module_request->GetSpecifier();
std::string absolute_path =
NormalizePath(ToSTLString(isolate, name), dir_name);
Local<FixedArray> import_assertions = module_request->GetImportAssertions();
ModuleType request_module_type =
ModuleEmbedderData::ModuleTypeFromImportAssertions(
context, import_assertions, true);
if (request_module_type == ModuleType::kInvalid) {
isolate->ThrowError("Invalid module type was asserted");
return MaybeLocal<Module>();
}
if (d->module_map.count(
std::make_pair(absolute_path, request_module_type))) {
continue;
}
if (FetchModuleTree(module, context, absolute_path, request_module_type)
.IsEmpty()) {
return MaybeLocal<Module>();
}
}
return module;
}
MaybeLocal<Value> Shell::JSONModuleEvaluationSteps(Local<Context> context,
Local<Module> module) {
Isolate* isolate = context->GetIsolate();
ModuleEmbedderData* d = GetModuleDataFromContext(context);
auto json_value_it =
d->json_module_to_parsed_json_map.find(Global<Module>(isolate, module));
CHECK(json_value_it != d->json_module_to_parsed_json_map.end());
Local<Value> json_value = json_value_it->second.Get(isolate);
TryCatch try_catch(isolate);
Maybe<bool> result = module->SetSyntheticModuleExport(
isolate,
String::NewFromUtf8Literal(isolate, "default",
NewStringType::kInternalized),
json_value);
// Setting the default export should never fail.
CHECK(!try_catch.HasCaught());
CHECK(!result.IsNothing() && result.FromJust());
Local<Promise::Resolver> resolver =
Promise::Resolver::New(context).ToLocalChecked();
resolver->Resolve(context, Undefined(isolate)).ToChecked();
return resolver->GetPromise();
}
struct DynamicImportData {
DynamicImportData(Isolate* isolate_, Local<String> referrer_,
Local<String> specifier_,
Local<FixedArray> import_assertions_,
Local<Promise::Resolver> resolver_)
: isolate(isolate_) {
referrer.Reset(isolate, referrer_);
specifier.Reset(isolate, specifier_);
import_assertions.Reset(isolate, import_assertions_);
resolver.Reset(isolate, resolver_);
}
Isolate* isolate;
Global<String> referrer;
Global<String> specifier;
Global<FixedArray> import_assertions;
Global<Promise::Resolver> resolver;
};
namespace {
struct ModuleResolutionData {
ModuleResolutionData(Isolate* isolate_, Local<Value> module_namespace_,
Local<Promise::Resolver> resolver_)
: isolate(isolate_) {
module_namespace.Reset(isolate, module_namespace_);
resolver.Reset(isolate, resolver_);
}
Isolate* isolate;
Global<Value> module_namespace;
Global<Promise::Resolver> resolver;
};
} // namespace
void Shell::ModuleResolutionSuccessCallback(
const FunctionCallbackInfo<Value>& info) {
std::unique_ptr<ModuleResolutionData> module_resolution_data(
static_cast<ModuleResolutionData*>(
info.Data().As<v8::External>()->Value()));
Isolate* isolate(module_resolution_data->isolate);
HandleScope handle_scope(isolate);
Local<Promise::Resolver> resolver(
module_resolution_data->resolver.Get(isolate));
Local<Value> module_namespace(
module_resolution_data->module_namespace.Get(isolate));
PerIsolateData* data = PerIsolateData::Get(isolate);
Local<Context> realm = data->realms_[data->realm_current_].Get(isolate);
Context::Scope context_scope(realm);
resolver->Resolve(realm, module_namespace).ToChecked();
}
void Shell::ModuleResolutionFailureCallback(
const FunctionCallbackInfo<Value>& info) {
std::unique_ptr<ModuleResolutionData> module_resolution_data(
static_cast<ModuleResolutionData*>(
info.Data().As<v8::External>()->Value()));
Isolate* isolate(module_resolution_data->isolate);
HandleScope handle_scope(isolate);
Local<Promise::Resolver> resolver(
module_resolution_data->resolver.Get(isolate));
PerIsolateData* data = PerIsolateData::Get(isolate);
Local<Context> realm = data->realms_[data->realm_current_].Get(isolate);
Context::Scope context_scope(realm);
DCHECK_EQ(info.Length(), 1);
resolver->Reject(realm, info[0]).ToChecked();
}
MaybeLocal<Promise> Shell::HostImportModuleDynamically(
Local<Context> context, Local<Data> host_defined_options,
Local<Value> resource_name, Local<String> specifier,
Local<FixedArray> import_assertions) {
Isolate* isolate = context->GetIsolate();
MaybeLocal<Promise::Resolver> maybe_resolver =
Promise::Resolver::New(context);
Local<Promise::Resolver> resolver;
if (!maybe_resolver.ToLocal(&resolver)) return MaybeLocal<Promise>();
if (!IsValidHostDefinedOptions(context, host_defined_options,
resource_name)) {
resolver
->Reject(context, v8::Exception::TypeError(String::NewFromUtf8Literal(
isolate, "Invalid host defined options")))
.ToChecked();
} else {
DynamicImportData* data =
new DynamicImportData(isolate, resource_name.As<String>(), specifier,
import_assertions, resolver);
PerIsolateData::Get(isolate)->AddDynamicImportData(data);
isolate->EnqueueMicrotask(Shell::DoHostImportModuleDynamically, data);
}
return resolver->GetPromise();
}
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::NewFromUtf8Literal(isolate, "url", NewStringType::kInternalized);
Local<String> url = String::NewFromUtf8(isolate, specifier_it->second.c_str())
.ToLocalChecked();
meta->CreateDataProperty(context, url_key, url).ToChecked();
}
MaybeLocal<Context> Shell::HostCreateShadowRealmContext(
Local<Context> initiator_context) {
return v8::Context::New(initiator_context->GetIsolate());
}
void Shell::DoHostImportModuleDynamically(void* import_data) {
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<FixedArray> import_assertions(
import_data_->import_assertions.Get(isolate));
Local<Promise::Resolver> resolver(import_data_->resolver.Get(isolate));
PerIsolateData* data = PerIsolateData::Get(isolate);
PerIsolateData::Get(isolate)->DeleteDynamicImportData(import_data_);
Local<Context> realm = data->realms_[data->realm_current_].Get(isolate);
Context::Scope context_scope(realm);
ModuleType module_type = ModuleEmbedderData::ModuleTypeFromImportAssertions(
realm, import_assertions, false);
TryCatch try_catch(isolate);
try_catch.SetVerbose(true);
if (module_type == ModuleType::kInvalid) {
isolate->ThrowError("Invalid module type was asserted");
CHECK(try_catch.HasCaught());
resolver->Reject(realm, try_catch.Exception()).ToChecked();
return;
}
std::string source_url = ToSTLString(isolate, referrer);
std::string dir_name =
DirName(NormalizePath(source_url, GetWorkingDirectory()));
std::string file_name = ToSTLString(isolate, specifier);
std::string absolute_path = NormalizePath(file_name, dir_name);
ModuleEmbedderData* d = GetModuleDataFromContext(realm);
Local<Module> root_module;
auto module_it =
d->module_map.find(std::make_pair(absolute_path, module_type));
if (module_it != d->module_map.end()) {
root_module = module_it->second.Get(isolate);
} else if (!FetchModuleTree(Local<Module>(), realm, absolute_path,
module_type)
.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);
CHECK(!maybe_result.IsEmpty());
EmptyMessageQueues(isolate);
}
Local<Value> result;
if (!maybe_result.ToLocal(&result)) {
DCHECK(try_catch.HasCaught());
resolver->Reject(realm, try_catch.Exception()).ToChecked();
return;
}
Local<Value> module_namespace = root_module->GetModuleNamespace();
Local<Promise> result_promise(result.As<Promise>());
// Setup callbacks, and then chain them to the result promise.
// ModuleResolutionData will be deleted by the callbacks.
auto module_resolution_data =
new ModuleResolutionData(isolate, module_namespace, resolver);
Local<v8::External> edata = External::New(isolate, module_resolution_data);
Local<Function> callback_success;
CHECK(Function::New(realm, ModuleResolutionSuccessCallback, edata)
.ToLocal(&callback_success));
Local<Function> callback_failure;
CHECK(Function::New(realm, ModuleResolutionFailureCallback, edata)
.ToLocal(&callback_failure));
result_promise->Then(realm, callback_success, callback_failure)
.ToLocalChecked();
}
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());
// Use a non-verbose TryCatch and report exceptions manually using
// Shell::ReportException, because some errors (such as file errors) are
// thrown without entering JS and thus do not trigger
// isolate->ReportPendingMessages().
TryCatch try_catch(isolate);
ModuleEmbedderData* d = GetModuleDataFromContext(realm);
Local<Module> root_module;
auto module_it = d->module_map.find(
std::make_pair(absolute_path, ModuleType::kJavaScript));
if (module_it != d->module_map.end()) {
root_module = module_it->second.Get(isolate);
} else if (!FetchModuleTree(Local<Module>(), realm, absolute_path,
ModuleType::kJavaScript)
.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);
CHECK(!maybe_result.IsEmpty());
EmptyMessageQueues(isolate);
}
Local<Value> result;
if (!maybe_result.ToLocal(&result)) {
DCHECK(try_catch.HasCaught());
ReportException(isolate, &try_catch);
return false;
}
// Loop until module execution finishes
Local<Promise> result_promise(result.As<Promise>());
while (result_promise->State() == Promise::kPending) {
Shell::CompleteMessageLoop(isolate);
}
if (result_promise->State() == Promise::kRejected) {
// If the exception has been caught by the promise pipeline, we rethrow
// here in order to ReportException.
// TODO(cbruni): Clean this up after we create a new API for the case
// where TLA is enabled.
if (!try_catch.HasCaught()) {
isolate->ThrowException(result_promise->Result());
} else {
DCHECK_EQ(try_catch.Exception(), result_promise->Result());
}
ReportException(isolate, &try_catch);
return false;
}
DCHECK(!try_catch.HasCaught());
return true;
}
bool Shell::ExecuteWebSnapshot(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);
TryCatch try_catch(isolate);
bool success = false;
std::string absolute_path = NormalizePath(file_name, GetWorkingDirectory());
int length = 0;
std::unique_ptr<uint8_t[]> snapshot_data(
reinterpret_cast<uint8_t*>(ReadChars(absolute_path.c_str(), &length)));
if (length == 0) {
isolate->ThrowError("Could not read the web snapshot file");
} else {
i::WebSnapshotDeserializer deserializer(isolate, snapshot_data.get(),
static_cast<size_t>(length));
success = deserializer.Deserialize();
}
if (!success) {
CHECK(try_catch.HasCaught());
ReportException(isolate, &try_catch);
}
return success;
}
// Treat every line as a JSON value and parse it.
bool Shell::LoadJSON(Isolate* isolate, const char* file_name) {
HandleScope handle_scope(isolate);
PerIsolateData* isolate_data = PerIsolateData::Get(isolate);
Local<Context> realm =
isolate_data->realms_[isolate_data->realm_current_].Get(isolate);
Context::Scope context_scope(realm);
TryCatch try_catch(isolate);
std::string absolute_path = NormalizePath(file_name, GetWorkingDirectory());
int length = 0;
std::unique_ptr<char[]> data(ReadChars(absolute_path.c_str(), &length));
if (length == 0) {
printf("Error reading '%s'\n", file_name);
base::OS::ExitProcess(1);
}
std::stringstream stream(data.get());
std::string line;
while (std::getline(stream, line, '\n')) {
Local<String> source =
String::NewFromUtf8(isolate, line.c_str()).ToLocalChecked();
MaybeLocal<Value> maybe_value = JSON::Parse(realm, source);
Local<Value> value;
if (!maybe_value.ToLocal(&value)) {
DCHECK(try_catch.HasCaught());
ReportException(isolate, &try_catch);
return false;
}
}
return true;
}
PerIsolateData::PerIsolateData(Isolate* isolate)
: isolate_(isolate), realms_(nullptr) {
isolate->SetData(0, this);
if (i::FLAG_expose_async_hooks) {
async_hooks_wrapper_ = new AsyncHooks(isolate);
}
ignore_unhandled_promises_ = false;
// TODO(v8:11525): Use methods on global Snapshot objects with
// signature checks.
HandleScope scope(isolate);
Shell::CreateSnapshotTemplate(isolate);
}
PerIsolateData::~PerIsolateData() {
isolate_->SetData(0, nullptr); // Not really needed, just to be sure...
if (i::FLAG_expose_async_hooks) {
delete async_hooks_wrapper_; // This uses the isolate
}
#if defined(LEAK_SANITIZER)
for (DynamicImportData* data : import_data_) {
delete data;
}
#endif
}
void PerIsolateData::SetTimeout(Local<Function> callback,
Local<Context> context) {
set_timeout_callbacks_.emplace(isolate_, callback);
set_timeout_contexts_.emplace(isolate_, context);
}
MaybeLocal<Function> PerIsolateData::GetTimeoutCallback() {
if (set_timeout_callbacks_.empty()) return MaybeLocal<Function>();
Local<Function> result = set_timeout_callbacks_.front().Get(isolate_);
set_timeout_callbacks_.pop();
return result;
}
MaybeLocal<Context> PerIsolateData::GetTimeoutContext() {
if (set_timeout_contexts_.empty()) return MaybeLocal<Context>();
Local<Context> result = set_timeout_contexts_.front().Get(isolate_);
set_timeout_contexts_.pop();
return result;
}
void PerIsolateData::RemoveUnhandledPromise(Local<Promise> promise) {
if (ignore_unhandled_promises_) return;
// Remove handled promises from the list
DCHECK_EQ(promise->GetIsolate(), isolate_);
for (auto it = unhandled_promises_.begin(); it != unhandled_promises_.end();
++it) {
v8::Local<v8::Promise> unhandled_promise = std::get<0>(*it).Get(isolate_);
if (unhandled_promise == promise) {
unhandled_promises_.erase(it--);
}
}
}
void PerIsolateData::AddUnhandledPromise(Local<Promise> promise,
Local<Message> message,
Local<Value> exception) {
if (ignore_unhandled_promises_) return;
DCHECK_EQ(promise->GetIsolate(), isolate_);
unhandled_promises_.emplace_back(v8::Global<v8::Promise>(isolate_, promise),
v8::Global<v8::Message>(isolate_, message),
v8::Global<v8::Value>(isolate_, exception));
}
int PerIsolateData::HandleUnhandledPromiseRejections() {
// Avoid recursive calls to HandleUnhandledPromiseRejections.
if (ignore_unhandled_promises_) return 0;
ignore_unhandled_promises_ = true;
v8::HandleScope scope(isolate_);
// Ignore promises that get added during error reporting.
size_t i = 0;
for (; i < unhandled_promises_.size(); i++) {
const auto& tuple = unhandled_promises_[i];
Local<v8::Message> message = std::get<1>(tuple).Get(isolate_);
Local<v8::Value> value = std::get<2>(tuple).Get(isolate_);
Shell::ReportException(isolate_, message, value);
}
unhandled_promises_.clear();
ignore_unhandled_promises_ = false;
return static_cast<int>(i);
}
void PerIsolateData::AddDynamicImportData(DynamicImportData* data) {
#if defined(LEAK_SANITIZER)
import_data_.insert(data);
#endif
}
void PerIsolateData::DeleteDynamicImportData(DynamicImportData* data) {
#if defined(LEAK_SANITIZER)
import_data_.erase(data);
#endif
delete data;
}
Local<FunctionTemplate> PerIsolateData::GetTestApiObjectCtor() const {
return test_api_object_ctor_.Get(isolate_);
}
void PerIsolateData::SetTestApiObjectCtor(Local<FunctionTemplate> ctor) {
test_api_object_ctor_.Reset(isolate_, ctor);
}
Local<FunctionTemplate> PerIsolateData::GetSnapshotObjectCtor() const {
return snapshot_object_ctor_.Get(isolate_);
}
void PerIsolateData::SetSnapshotObjectCtor(Local<FunctionTemplate> ctor) {
snapshot_object_ctor_.Reset(isolate_, ctor);
}
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_->GetEnteredOrMicrotaskContext());
}
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_));
}
data_->realm_count_ = 0;
delete[] data_->realms_;
}
PerIsolateData::ExplicitRealmScope::ExplicitRealmScope(PerIsolateData* data,
int index)
: data_(data), index_(index) {
realm_ = Local<Context>::New(data->isolate_, data->realms_[index_]);
realm_->Enter();
previous_index_ = data->realm_current_;
data->realm_current_ = data->realm_switch_ = index_;
}
PerIsolateData::ExplicitRealmScope::~ExplicitRealmScope() {
realm_->Exit();
data_->realm_current_ = data_->realm_switch_ = previous_index_;
}
Local<Context> PerIsolateData::ExplicitRealmScope::context() const {
return realm_;
}
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()) {
args.GetIsolate()->ThrowError("Invalid argument");
return -1;
}
int index = args[arg_offset]
->Int32Value(args.GetIsolate()->GetCurrentContext())
.FromMaybe(-1);
if (index < 0 || index >= realm_count_ || realms_[index].IsEmpty()) {
args.GetIsolate()->ThrowError("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::Now() - kInitialTicks;
args.GetReturnValue().Set(delta.InMillisecondsF());
}
}
// performance.measureMemory() implements JavaScript Memory API proposal.
// See https://github.com/ulan/javascript-agent-memory/blob/master/explainer.md.
void Shell::PerformanceMeasureMemory(
const v8::FunctionCallbackInfo<v8::Value>& args) {
v8::MeasureMemoryMode mode = v8::MeasureMemoryMode::kSummary;
v8::Isolate* isolate = args.GetIsolate();
Local<Context> context = isolate->GetCurrentContext();
if (args.Length() >= 1 && args[0]->IsObject()) {
Local<Object> object = args[0].As<Object>();
Local<Value> value = TryGetValue(isolate, context, object, "detailed")
.FromMaybe(Local<Value>());
if (value.IsEmpty()) {
// Exception was thrown and scheduled, so return from the callback.
return;
}
if (value->IsBoolean() && value->BooleanValue(isolate)) {
mode = v8::MeasureMemoryMode::kDetailed;
}
}
Local<v8::Promise::Resolver> promise_resolver =
v8::Promise::Resolver::New(context).ToLocalChecked();
args.GetIsolate()->MeasureMemory(
v8::MeasureMemoryDelegate::Default(isolate, context, promise_resolver,
mode),
v8::MeasureMemoryExecution::kEager);
args.GetReturnValue().Set(promise_resolver->GetPromise());
}
// 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->GetEnteredOrMicrotaskContext());
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()) {
args.GetIsolate()->ThrowError("Invalid argument");
return;
}
Local<Object> object =
args[0]->ToObject(isolate->GetCurrentContext()).ToLocalChecked();
i::Handle<i::JSReceiver> i_object = Utils::OpenHandle(*object);
if (i_object->IsJSGlobalProxy() &&
i::Handle<i::JSGlobalProxy>::cast(i_object)->IsDetached()) {
return;
}
Local<Context> creation_context;
if (!object->GetCreationContext().ToLocal(&creation_context)) {
args.GetIsolate()->ThrowError("object doesn't have creation context");
return;
}
int index = data->RealmFind(creation_context);
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;
// TODO(chromium:324812): Ideally Context::Global should never return raw
// global objects but return a global proxy. Currently it returns global
// object when the global proxy is detached from the global object. The
// following is a workaround till we fix Context::Global so we don't leak
// global objects.
Local<Object> global =
Local<Context>::New(args.GetIsolate(), data->realms_[index])->Global();
i::Handle<i::Object> i_global = Utils::OpenHandle(*global);
if (i_global->IsJSGlobalObject()) {
i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(args.GetIsolate());
i::Handle<i::JSObject> i_global_proxy =
handle(i::Handle<i::JSGlobalObject>::cast(i_global)->global_proxy(),
i_isolate);
global = Utils::ToLocal(i_global_proxy);
}
args.GetReturnValue().Set(global);
}
MaybeLocal<Context> Shell::CreateRealm(
const v8::FunctionCallbackInfo<v8::Value>& args, int index,
v8::MaybeLocal<Value> global_object) {
const char* kGlobalHandleLabel = "d8::realm";
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) {
Global<Context>& realm = data->realms_[i];
realm.Reset(isolate, old_realms[i]);
if (!realm.IsEmpty()) {
realm.AnnotateStrongRetainer(kGlobalHandleLabel);
}
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);
data->realms_[index].AnnotateStrongRetainer(kGlobalHandleLabel);
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);
Local<Context> context = data->realms_[index].Get(isolate);
DisposeModuleEmbedderData(context);
data->realms_[index].Reset();
// ContextDisposedNotification expects the disposed context to be entered.
v8::Context::Scope scope(context);
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()->GetEnteredOrMicrotaskContext()->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_) {
args.GetIsolate()->ThrowError("Invalid realm index");
return;
}
Local<Context> context = Local<Context>::New(isolate, data->realms_[index]);
v8::MaybeLocal<Value> global_object = context->Global();
// Context::Global doesn't return JSGlobalProxy if DetachGlobal is called in
// advance.
if (!global_object.IsEmpty()) {
HandleScope scope(isolate);
if (!Utils::OpenHandle(*global_object.ToLocalChecked())
->IsJSGlobalProxy()) {
global_object = v8::MaybeLocal<Value>();
}
}
DisposeRealm(args, index);
CreateRealm(args, index, global_object);
}
// Realm.detachGlobal(i) detaches the global objects of realm i from realm i.
void Shell::RealmDetachGlobal(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_) {
args.GetIsolate()->ThrowError("Invalid realm index");
return;
}
HandleScope scope(isolate);
Local<Context> realm = Local<Context>::New(isolate, data->realms_[index]);
realm->DetachGlobal();
}
// 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_) {
args.GetIsolate()->ThrowError("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) {
isolate->ThrowError("Invalid argument");
return;
}
Local<String> source;
if (!ReadSource(args, 1, CodeType::kString).ToLocal(&source)) {
isolate->ThrowError("Invalid argument");
return;
}
ScriptOrigin origin =
CreateScriptOrigin(isolate, String::NewFromUtf8Literal(isolate, "(d8)"),
ScriptType::kClassic);
ScriptCompiler::Source script_source(source, origin);
Local<UnboundScript> script;
if (!ScriptCompiler::CompileUnboundScript(isolate, &script_source)
.ToLocal(&script)) {
return;
}
Local<Value> result;
{
PerIsolateData::ExplicitRealmScope realm_scope(data, index);
if (!script->BindToCurrentContext()
->Run(realm_scope.context())
.ToLocal(&result)) {
return;
}
}
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);
}
// Realm.takeWebSnapshot(index, exports) takes a snapshot of the list of exports
// in the realm with the specified index and returns the result.
void Shell::RealmTakeWebSnapshot(
const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
if (args.Length() < 2 || !args[1]->IsArray()) {
isolate->ThrowError("Invalid argument");
return;
}
PerIsolateData* data = PerIsolateData::Get(isolate);
int index = data->RealmIndexOrThrow(args, 0);
if (index == -1) return;
// Create a Local<PrimitiveArray> from the exports array.
Local<Context> current_context = isolate->GetCurrentContext();
Local<Array> exports_array = args[1].As<Array>();
int length = exports_array->Length();
Local<PrimitiveArray> exports = PrimitiveArray::New(isolate, length);
for (int i = 0; i < length; ++i) {
Local<Value> value;
Local<String> str;
if (!exports_array->Get(current_context, i).ToLocal(&value) ||
!value->ToString(current_context).ToLocal(&str) || str.IsEmpty()) {
isolate->ThrowError("Invalid argument");
return;
}
exports->Set(isolate, i, str);
}
// Take the snapshot in the specified Realm.
auto snapshot_data_shared = std::make_shared<i::WebSnapshotData>();
{
TryCatch try_catch(isolate);
try_catch.SetVerbose(true);
PerIsolateData::ExplicitRealmScope realm_scope(data, index);
i::WebSnapshotSerializer serializer(isolate);
if (!serializer.TakeSnapshot(realm_scope.context(), exports,
*snapshot_data_shared)) {
CHECK(try_catch.HasCaught());
args.GetReturnValue().Set(Undefined(isolate));
return;
}
}
// Create a snapshot object and store the WebSnapshotData as an embedder
// field. TODO(v8:11525): Use methods on global Snapshot objects with
// signature checks.
i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
i::Handle<i::Object> snapshot_data_managed =
i::Managed<i::WebSnapshotData>::FromSharedPtr(
i_isolate, snapshot_data_shared->buffer_size, snapshot_data_shared);
v8::Local<v8::Value> shapshot_data = Utils::ToLocal(snapshot_data_managed);
Local<ObjectTemplate> snapshot_template =
data->GetSnapshotObjectCtor()->InstanceTemplate();
Local<Object> snapshot_instance =
snapshot_template->NewInstance(isolate->GetCurrentContext())
.ToLocalChecked();
snapshot_instance->SetInternalField(0, shapshot_data);
args.GetReturnValue().Set(snapshot_instance);
}
// Realm.useWebSnapshot(index, snapshot) deserializes the snapshot in the realm
// with the specified index.
void Shell::RealmUseWebSnapshot(
const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
if (args.Length() < 2 || !args[1]->IsObject()) {
isolate->ThrowError("Invalid argument");
return;
}
PerIsolateData* data = PerIsolateData::Get(isolate);
int index = data->RealmIndexOrThrow(args, 0);
if (index == -1) return;
// Restore the snapshot data from the snapshot object.
Local<Object> snapshot_instance = args[1].As<Object>();
Local<FunctionTemplate> snapshot_template = data->GetSnapshotObjectCtor();
if (!snapshot_template->HasInstance(snapshot_instance)) {
isolate->ThrowError("Invalid argument");
return;
}
v8::Local<v8::Value> snapshot_data = snapshot_instance->GetInternalField(0);
i::Handle<i::Object> snapshot_data_handle = Utils::OpenHandle(*snapshot_data);
auto snapshot_data_managed =
i::Handle<i::Managed<i::WebSnapshotData>>::cast(snapshot_data_handle);
std::shared_ptr<i::WebSnapshotData> snapshot_data_shared =
snapshot_data_managed->get();
// Deserialize the snapshot in the specified Realm.
{
PerIsolateData::ExplicitRealmScope realm_scope(data, index);
i::WebSnapshotDeserializer deserializer(isolate,
snapshot_data_shared->buffer,
snapshot_data_shared->buffer_size);
bool success = deserializer.Deserialize();
args.GetReturnValue().Set(success);
}
}
void Shell::LogGetAndStop(const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
HandleScope handle_scope(isolate);
std::string file_name = i_isolate->logger()->file_name();
if (!i::Log::IsLoggingToTemporaryFile(file_name)) {
isolate->ThrowError("Only capturing from temporary files is supported.");
return;
}
if (!i_isolate->logger()->is_logging()) {
isolate->ThrowError("Logging not enabled.");
return;
}
std::string raw_log;
FILE* log_file = i_isolate->logger()->TearDownAndGetLogFile();
if (!log_file) {
isolate->ThrowError("Log file does not exist.");
return;
}
bool exists = false;
raw_log = i::ReadFile(log_file, &exists, true);
base::Fclose(log_file);
if (!exists) {
isolate->ThrowError("Unable to read log file.");
return;
}
Local<String> result =
String::NewFromUtf8(isolate, raw_log.c_str(), NewStringType::kNormal,
static_cast<int>(raw_log.size()))
.ToLocalChecked();
args.GetReturnValue().Set(result);
}
void Shell::TestVerifySourcePositions(
const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
// Check if the argument is a valid function.
if (args.Length() != 1) {
isolate->ThrowError("Expected function as single argument.");
return;
}
auto arg_handle = Utils::OpenHandle(*args[0]);
if (!arg_handle->IsHeapObject() ||
!i::Handle<i::HeapObject>::cast(arg_handle)
->IsJSFunctionOrBoundFunctionOrWrappedFunction()) {
isolate->ThrowError("Expected function as single argument.");
return;
}
i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
HandleScope handle_scope(isolate);
auto callable =
i::Handle<i::JSFunctionOrBoundFunctionOrWrappedFunction>::cast(
arg_handle);
while (callable->IsJSBoundFunction()) {
internal::DisallowGarbageCollection no_gc;
auto bound_function = i::Handle<i::JSBoundFunction>::cast(callable);
auto bound_target = bound_function->bound_target_function();
if (!bound_target.IsJSFunctionOrBoundFunctionOrWrappedFunction()) {
internal::AllowGarbageCollection allow_gc;
isolate->ThrowError("Expected function as bound target.");
return;
}
callable = handle(
i::JSFunctionOrBoundFunctionOrWrappedFunction::cast(bound_target),
i_isolate);
}
i::Handle<i::JSFunction> function = i::Handle<i::JSFunction>::cast(callable);
if (!function->shared().HasBytecodeArray()) {
isolate->ThrowError("Function has no BytecodeArray attached.");
return;
}
i::Handle<i::BytecodeArray> bytecodes =
handle(function->shared().GetBytecodeArray(i_isolate), i_isolate);
i::interpreter::BytecodeArrayIterator bytecode_iterator(bytecodes);
bool has_baseline = function->shared().HasBaselineCode();
i::Handle<i::ByteArray> bytecode_offsets;
std::unique_ptr<i::baseline::BytecodeOffsetIterator> offset_iterator;
if (has_baseline) {
bytecode_offsets =
handle(i::ByteArray::cast(
function->shared().GetCode().bytecode_offset_table()),
i_isolate);
offset_iterator = std::make_unique<i::baseline::BytecodeOffsetIterator>(
bytecode_offsets, bytecodes);
// A freshly initiated BytecodeOffsetIterator points to the prologue.
DCHECK_EQ(offset_iterator->current_pc_start_offset(), 0);
DCHECK_EQ(offset_iterator->current_bytecode_offset(),
i::kFunctionEntryBytecodeOffset);
offset_iterator->Advance();
}
while (!bytecode_iterator.done()) {
if (has_baseline) {
if (offset_iterator->current_bytecode_offset() !=
bytecode_iterator.current_offset()) {
isolate->ThrowError("Baseline bytecode offset mismatch.");
return;
}
// Check that we map every address to this bytecode correctly.
// The start address is exclusive and the end address inclusive.
for (i::Address pc = offset_iterator->current_pc_start_offset() + 1;
pc <= offset_iterator->current_pc_end_offset(); ++pc) {
i::baseline::BytecodeOffsetIterator pc_lookup(bytecode_offsets,
bytecodes);
pc_lookup.AdvanceToPCOffset(pc);
if (pc_lookup.current_bytecode_offset() !=
bytecode_iterator.current_offset()) {
isolate->ThrowError(
"Baseline bytecode offset mismatch for PC lookup.");
return;
}
}
}
bytecode_iterator.Advance();
if (has_baseline && !bytecode_iterator.done()) {
if (offset_iterator->done()) {
isolate->ThrowError("Missing bytecode(s) in baseline offset mapping.");
return;
}
offset_iterator->Advance();
}
}
if (has_baseline && !offset_iterator->done()) {
isolate->ThrowError("Excess offsets in baseline offset mapping.");
return;
}
}
// async_hooks.createHook() registers functions to be called for different
// lifetime events of each async operation.
void Shell::AsyncHooksCreateHook(
const v8::FunctionCallbackInfo<v8::Value>& args) {
Local<Object> wrap =
PerIsolateData::Get(args.GetIsolate())->GetAsyncHooks()->CreateHook(args);
args.GetReturnValue().Set(wrap);
}
// async_hooks.executionAsyncId() returns the asyncId of the current execution
// context.
void Shell::AsyncHooksExecutionAsyncId(
const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
HandleScope handle_scope(isolate);
args.GetReturnValue().Set(v8::Number::New(
isolate,
PerIsolateData::Get(isolate)->GetAsyncHooks()->GetExecutionAsyncId()));
}
void Shell::AsyncHooksTriggerAsyncId(
const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
HandleScope handle_scope(isolate);
args.GetReturnValue().Set(v8::Number::New(
isolate,
PerIsolateData::Get(isolate)->GetAsyncHooks()->GetTriggerAsyncId()));
}
void Shell::SetPromiseHooks(const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
if (i::FLAG_correctness_fuzzer_suppressions) {
// Setting promise hoooks dynamically has unexpected timing side-effects
// with certain promise optimizations. We might not get all callbacks for
// previously scheduled Promises or optimized code-paths that skip Promise
// creation.
isolate->ThrowError(
"d8.promise.setHooks is disabled with "
"--correctness-fuzzer-suppressions");
return;
}
#ifdef V8_ENABLE_JAVASCRIPT_PROMISE_HOOKS
Local<Context> context = isolate->GetCurrentContext();
HandleScope handle_scope(isolate);
context->SetPromiseHooks(
args[0]->IsFunction() ? args[0].As<Function>() : Local<Function>(),
args[1]->IsFunction() ? args[1].As<Function>() : Local<Function>(),
args[2]->IsFunction() ? args[2].As<Function>() : Local<Function>(),
args[3]->IsFunction() ? args[3].As<Function>() : Local<Function>());
args.GetReturnValue().Set(v8::Undefined(isolate));
#else // V8_ENABLE_JAVASCRIPT_PROMISE_HOOKS
isolate->ThrowError(
"d8.promise.setHooks is disabled due to missing build flag "
"v8_enabale_javascript_in_promise_hooks");
#endif // V8_ENABLE_JAVASCRIPT_PROMISE_HOOKS
}
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 = arg.As<Symbol>()->Description(args.GetIsolate());
}
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");
base::OS::ExitProcess(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::WriteStdout(const v8::FunctionCallbackInfo<v8::Value>& args) {
WriteToFile(stdout, args);
}
void Shell::ReadFile(const v8::FunctionCallbackInfo<v8::Value>& args) {
String::Utf8Value file_name(args.GetIsolate(), args[0]);
if (*file_name == nullptr) {
args.GetIsolate()->ThrowError("Error converting filename to string");
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_name);
if (source.IsEmpty()) return;
args.GetReturnValue().Set(source);
}
Local<String> Shell::ReadFromStdin(Isolate* isolate) {
static const int kBufferSize = 256;
char buffer[kBufferSize];
Local<String> accumulator = String::NewFromUtf8Literal(isolate, "");
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(
isolate, accumulator,
String::NewFromUtf8(isolate, buffer, NewStringType::kNormal, length)
.ToLocalChecked());
} else if (length > 1 && buffer[length - 2] == '\\') {
buffer[length - 2] = '\n';
accumulator =
String::Concat(isolate, accumulator,
String::NewFromUtf8(isolate, buffer,
NewStringType::kNormal, length - 1)
.ToLocalChecked());
} else {
return String::Concat(
isolate, accumulator,
String::NewFromUtf8(isolate, buffer, NewStringType::kNormal,
length - 1)
.ToLocalChecked());
}
}
}
void Shell::ExecuteFile(const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
for (int i = 0; i < args.Length(); i++) {
HandleScope handle_scope(isolate);
String::Utf8Value file_name(isolate, args[i]);
if (*file_name == nullptr) {
std::ostringstream oss;
oss << "Cannot convert file[" << i << "] name to string.";
isolate->ThrowError(
String::NewFromUtf8(isolate, oss.str().c_str()).ToLocalChecked());
return;
}
Local<String> source = ReadFile(isolate, *file_name);
if (source.IsEmpty()) return;
if (!ExecuteString(
args.GetIsolate(), source,
String::NewFromUtf8(isolate, *file_name).ToLocalChecked(),
kNoPrintResult,
options.quiet_load ? kNoReportExceptions : kReportExceptions,
kNoProcessMessageQueue)) {
std::ostringstream oss;
oss << "Error executing file: \"" << *file_name << '"';
isolate->ThrowError(
String::NewFromUtf8(isolate, oss.str().c_str()).ToLocalChecked());
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 = args[0].As<Function>();
Local<Context> context = isolate->GetCurrentContext();
PerIsolateData::Get(isolate)->SetTimeout(callback, context);
}
void Shell::ReadCodeTypeAndArguments(
const v8::FunctionCallbackInfo<v8::Value>& args, int index,
CodeType* code_type, Local<Value>* arguments) {
Isolate* isolate = args.GetIsolate();
if (args.Length() > index && args[index]->IsObject()) {
Local<Object> object = args[index].As<Object>();
Local<Context> context = isolate->GetCurrentContext();
Local<Value> value;
if (!TryGetValue(isolate, context, object, "type").ToLocal(&value)) {
*code_type = CodeType::kNone;
return;
}
if (!value->IsString()) {
*code_type = CodeType::kInvalid;
return;
}
Local<String> worker_type_string =
value->ToString(context).ToLocalChecked();
String::Utf8Value str(isolate, worker_type_string);
if (strcmp("classic", *str) == 0) {
*code_type = CodeType::kFileName;
} else if (strcmp("string", *str) == 0) {
*code_type = CodeType::kString;
} else if (strcmp("function", *str) == 0) {
*code_type = CodeType::kFunction;
} else {
*code_type = CodeType::kInvalid;
}
if (arguments != nullptr) {
bool got_arguments =
TryGetValue(isolate, context, object, "arguments").ToLocal(arguments);
USE(got_arguments);
}
} else {
*code_type = CodeType::kNone;
}
}
bool Shell::FunctionAndArgumentsToString(Local<Function> function,
Local<Value> arguments,
Local<String>* source,
Isolate* isolate) {
Local<Context> context = isolate->GetCurrentContext();
MaybeLocal<String> maybe_function_string =
function->FunctionProtoToString(context);
Local<String> function_string;
if (!maybe_function_string.ToLocal(&function_string)) {
isolate->ThrowError("Failed to convert function to string");
return false;
}
*source = String::NewFromUtf8Literal(isolate, "(");
*source = String::Concat(isolate, *source, function_string);
Local<String> middle = String::NewFromUtf8Literal(isolate, ")(");
*source = String::Concat(isolate, *source, middle);
if (!arguments.IsEmpty() && !arguments->IsUndefined()) {
if (!arguments->IsArray()) {
isolate->ThrowError("'arguments' must be an array");
return false;
}
Local<String> comma = String::NewFromUtf8Literal(isolate, ",");
Local<Array> array = arguments.As<Array>();
for (uint32_t i = 0; i < array->Length(); ++i) {
if (i > 0) {
*source = String::Concat(isolate, *source, comma);
}
MaybeLocal<Value> maybe_argument = array->Get(context, i);
Local<Value> argument;
if (!maybe_argument.ToLocal(&argument)) {
isolate->ThrowError("Failed to get argument");
return false;
}
Local<String> argument_string;
if (!JSON::Stringify(context, argument).ToLocal(&argument_string)) {
isolate->ThrowError("Failed to convert argument to string");
return false;
}
*source = String::Concat(isolate, *source, argument_string);
}
}
Local<String> suffix = String::NewFromUtf8Literal(isolate, ")");
*source = String::Concat(isolate, *source, suffix);
return true;
}
// ReadSource() supports reading source code through `args[index]` as specified
// by the `default_type` or an optional options bag provided in `args[index+1]`
// (e.g. `options={type: 'code_type', arguments:[...]}`).
MaybeLocal<String> Shell::ReadSource(
const v8::FunctionCallbackInfo<v8::Value>& args, int index,
CodeType default_type) {
CodeType code_type;
Local<Value> arguments;
ReadCodeTypeAndArguments(args, index + 1, &code_type, &arguments);
Isolate* isolate = args.GetIsolate();
Local<String> source;
if (code_type == CodeType::kNone) {
code_type = default_type;
}
switch (code_type) {
case CodeType::kFunction:
if (!args[index]->IsFunction()) {
return MaybeLocal<String>();
}
// Source: ( function_to_string )( params )
if (!FunctionAndArgumentsToString(args[index].As<Function>(), arguments,
&source, isolate)) {
return MaybeLocal<String>();
}
break;
case CodeType::kFileName: {
if (!args[index]->IsString()) {
return MaybeLocal<String>();
}
String::Utf8Value filename(isolate, args[index]);
source = Shell::ReadFile(isolate, *filename);
if (source.IsEmpty()) return MaybeLocal<String>();
break;
}
case CodeType::kString:
if (!args[index]->IsString()) {
return MaybeLocal<String>();
}
source = args[index].As<String>();
break;
case CodeType::kNone:
case CodeType::kInvalid:
return MaybeLocal<String>();
}
return source;
}
void Shell::WorkerNew(const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
HandleScope handle_scope(isolate);
if (args.Length() < 1 || (!args[0]->IsString() && !args[0]->IsFunction())) {
isolate->ThrowError("1st argument must be a string or a function");
return;
}
Local<String> source;
if (!ReadSource(args, 0, CodeType::kFileName).ToLocal(&source)) {
isolate->ThrowError("Invalid argument");
return;
}
if (!args.IsConstructCall()) {
isolate->ThrowError("Worker must be constructed with new");
return;
}
// Initialize the embedder field to 0; 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()->SetInternalField(0, v8::Integer::New(isolate, 0));
{
// Don't allow workers to create more workers if the main thread
// is waiting for existing running workers to terminate.
base::MutexGuard lock_guard(workers_mutex_.Pointer());
if (!allow_new_workers_) return;
String::Utf8Value script(isolate, source);
if (!*script) {
isolate->ThrowError("Can't get worker script");
return;
}
// The C++ worker object's lifetime is shared between the Managed<Worker>
// object on the heap, which the JavaScript object points to, and an
// internal std::shared_ptr in the worker thread itself.
auto worker = std::make_shared<Worker>(*script);
i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
const size_t kWorkerSizeEstimate = 4 * 1024 * 1024; // stack + heap.
i::Handle<i::Object> managed = i::Managed<Worker>::FromSharedPtr(
i_isolate, kWorkerSizeEstimate, worker);
args.Holder()->SetInternalField(0, Utils::ToLocal(managed));
if (!Worker::StartWorkerThread(std::move(worker))) {
isolate->ThrowError("Can't start thread");
return;
}
}
}
void Shell::WorkerPostMessage(const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
HandleScope handle_scope(isolate);
if (args.Length() < 1) {
isolate->ThrowError("Invalid argument");
return;
}
std::shared_ptr<Worker> worker =
GetWorkerFromInternalField(isolate, args.Holder());
if (!worker.get()) {
return;
}
Local<Value> message = args[0];
Local<Value> transfer =
args.Length() >= 2 ? args[1] : Undefined(isolate).As<Value>();
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);
std::shared_ptr<Worker> worker =
GetWorkerFromInternalField(isolate, args.Holder());
if (!worker.get()) {
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);
std::shared_ptr<Worker> worker =
GetWorkerFromInternalField(isolate, args.Holder());
if (!worker.get()) return;
worker->Terminate();
}
void Shell::WorkerTerminateAndWait(
const v8::FunctionCallbackInfo<v8::Value>& args) {
Isolate* isolate = args.GetIsolate();
HandleScope handle_scope(isolate);
std::shared_ptr<Worker> worker =
GetWorkerFromInternalField(isolate, args.Holder());
if (!worker.get()) {
return;
}
worker->TerminateAndWaitForThread();
}
void Shell::QuitOnce(v8::FunctionCallbackInfo<v8::Value>* args) {
int exit_code = (*args)[0]
->Int32Value(args->GetIsolate()->GetCurrentContext())
.FromMaybe(0);
WaitForRunningWorkers();
Isolate* isolate = args->GetIsolate();
isolate->Exit();
// As we exit the process anyway, we do not dispose the platform and other
// global data and manually unlock to quell DCHECKs. Other isolates might
// still be running, so disposing here can cause them to crash.
i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
if (i_isolate->thread_manager()->IsLockedByCurrentThread()) {
i_isolate->thread_manager()->Unlock();
}