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cobalt / cobalt / c22907dbc00f1b681ca5a66f4cbc333d84fae0a5 / . / src / v8 / src / api.cc
blob: 2bd3135de757a787d2533da956a8edb68a1994c1 [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 "src/api.h"
#include <string.h> // For memcpy, strlen.
#ifdef V8_USE_ADDRESS_SANITIZER
#include <sanitizer/asan_interface.h>
#endif // V8_USE_ADDRESS_SANITIZER
#include <cmath> // For isnan.
#include <limits>
#include <vector>
#include "include/v8-debug.h"
#include "include/v8-profiler.h"
#include "include/v8-testing.h"
#include "include/v8-util.h"
#include "src/accessors.h"
#include "src/api-natives.h"
#include "src/assert-scope.h"
#include "src/base/functional.h"
#include "src/base/logging.h"
#include "src/base/platform/platform.h"
#include "src/base/platform/time.h"
#include "src/base/safe_conversions.h"
#include "src/base/utils/random-number-generator.h"
#include "src/bootstrapper.h"
#include "src/builtins/builtins-utils.h"
#include "src/char-predicates-inl.h"
#include "src/code-stubs.h"
#include "src/compiler-dispatcher/compiler-dispatcher.h"
#include "src/compiler.h"
#include "src/contexts.h"
#include "src/conversions-inl.h"
#include "src/counters.h"
#include "src/debug/debug-coverage.h"
#include "src/debug/debug-type-profile.h"
#include "src/debug/debug.h"
#include "src/deoptimizer.h"
#include "src/detachable-vector.h"
#include "src/execution.h"
#include "src/frames-inl.h"
#include "src/gdb-jit.h"
#include "src/global-handles.h"
#include "src/globals.h"
#include "src/icu_util.h"
#include "src/isolate-inl.h"
#include "src/json-parser.h"
#include "src/json-stringifier.h"
#include "src/messages.h"
#include "src/objects-inl.h"
#include "src/parsing/background-parsing-task.h"
#include "src/parsing/parser.h"
#include "src/parsing/scanner-character-streams.h"
#include "src/pending-compilation-error-handler.h"
#include "src/profiler/cpu-profiler.h"
#include "src/profiler/heap-profiler.h"
#include "src/profiler/heap-snapshot-generator-inl.h"
#include "src/profiler/profile-generator-inl.h"
#include "src/profiler/tick-sample.h"
#include "src/property-descriptor.h"
#include "src/property-details.h"
#include "src/property.h"
#include "src/prototype.h"
#include "src/runtime-profiler.h"
#include "src/runtime/runtime.h"
#include "src/simulator.h"
#include "src/snapshot/builtin-serializer.h"
#include "src/snapshot/code-serializer.h"
#include "src/snapshot/natives.h"
#include "src/snapshot/snapshot.h"
#include "src/startup-data-util.h"
#include "src/tracing/trace-event.h"
#include "src/trap-handler/trap-handler.h"
#include "src/unicode-cache-inl.h"
#include "src/unicode-inl.h"
#include "src/v8.h"
#include "src/v8threads.h"
#include "src/value-serializer.h"
#include "src/version.h"
#include "src/vm-state-inl.h"
#include "src/wasm/compilation-manager.h"
#include "src/wasm/streaming-decoder.h"
#include "src/wasm/wasm-engine.h"
#include "src/wasm/wasm-objects-inl.h"
#include "src/wasm/wasm-result.h"
#include "src/wasm/wasm-serialization.h"
#if V8_OS_STARBOARD
#include "src/poems.h"
#endif
namespace v8 {
/*
* Most API methods should use one of the three macros:
*
* ENTER_V8, ENTER_V8_NO_SCRIPT, ENTER_V8_NO_SCRIPT_NO_EXCEPTION.
*
* The latter two assume that no script is executed, and no exceptions are
* scheduled in addition (respectively). Creating a pending exception and
* removing it before returning is ok.
*
* Exceptions should be handled either by invoking one of the
* RETURN_ON_FAILED_EXECUTION* macros.
*
* Don't use macros with DO_NOT_USE in their name.
*
* TODO(jochen): Document debugger specific macros.
* TODO(jochen): Document LOG_API and other RuntimeCallStats macros.
* TODO(jochen): All API methods should invoke one of the ENTER_V8* macros.
* TODO(jochen): Remove calls form API methods to DO_NOT_USE macros.
*/
#define LOG_API(isolate, class_name, function_name) \
i::RuntimeCallTimerScope _runtime_timer( \
isolate, i::RuntimeCallCounterId::kAPI_##class_name##_##function_name); \
LOG(isolate, ApiEntryCall("v8::" #class_name "::" #function_name))
#define ENTER_V8_DO_NOT_USE(isolate) i::VMState<v8::OTHER> __state__((isolate))
#define ENTER_V8_HELPER_DO_NOT_USE(isolate, context, class_name, \
function_name, bailout_value, \
HandleScopeClass, do_callback) \
if (IsExecutionTerminatingCheck(isolate)) { \
return bailout_value; \
} \
HandleScopeClass handle_scope(isolate); \
CallDepthScope<do_callback> call_depth_scope(isolate, context); \
LOG_API(isolate, class_name, function_name); \
i::VMState<v8::OTHER> __state__((isolate)); \
bool has_pending_exception = false
#define PREPARE_FOR_DEBUG_INTERFACE_EXECUTION_WITH_ISOLATE(isolate, T) \
if (IsExecutionTerminatingCheck(isolate)) { \
return MaybeLocal<T>(); \
} \
InternalEscapableScope handle_scope(isolate); \
CallDepthScope<false> call_depth_scope(isolate, v8::Local<v8::Context>()); \
i::VMState<v8::OTHER> __state__((isolate)); \
bool has_pending_exception = false
#define PREPARE_FOR_EXECUTION_WITH_CONTEXT(context, class_name, function_name, \
bailout_value, HandleScopeClass, \
do_callback) \
auto isolate = context.IsEmpty() \
? i::Isolate::Current() \
: reinterpret_cast<i::Isolate*>(context->GetIsolate()); \
ENTER_V8_HELPER_DO_NOT_USE(isolate, context, class_name, function_name, \
bailout_value, HandleScopeClass, do_callback);
#define PREPARE_FOR_EXECUTION(context, class_name, function_name, T) \
PREPARE_FOR_EXECUTION_WITH_CONTEXT(context, class_name, function_name, \
MaybeLocal<T>(), InternalEscapableScope, \
false)
#define ENTER_V8(isolate, context, class_name, function_name, bailout_value, \
HandleScopeClass) \
ENTER_V8_HELPER_DO_NOT_USE(isolate, context, class_name, function_name, \
bailout_value, HandleScopeClass, true)
#ifdef DEBUG
#define ENTER_V8_NO_SCRIPT(isolate, context, class_name, function_name, \
bailout_value, HandleScopeClass) \
ENTER_V8_HELPER_DO_NOT_USE(isolate, context, class_name, function_name, \
bailout_value, HandleScopeClass, false); \
i::DisallowJavascriptExecutionDebugOnly __no_script__((isolate))
#define ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate) \
i::VMState<v8::OTHER> __state__((isolate)); \
i::DisallowJavascriptExecutionDebugOnly __no_script__((isolate)); \
i::DisallowExceptions __no_exceptions__((isolate))
#define ENTER_V8_FOR_NEW_CONTEXT(isolate) \
i::VMState<v8::OTHER> __state__((isolate)); \
i::DisallowExceptions __no_exceptions__((isolate))
#else
#define ENTER_V8_NO_SCRIPT(isolate, context, class_name, function_name, \
bailout_value, HandleScopeClass) \
ENTER_V8_HELPER_DO_NOT_USE(isolate, context, class_name, function_name, \
bailout_value, HandleScopeClass, false)
#define ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate) \
i::VMState<v8::OTHER> __state__((isolate));
#define ENTER_V8_FOR_NEW_CONTEXT(isolate) \
i::VMState<v8::OTHER> __state__((isolate));
#endif // DEBUG
#define EXCEPTION_BAILOUT_CHECK_SCOPED_DO_NOT_USE(isolate, value) \
do { \
if (has_pending_exception) { \
call_depth_scope.Escape(); \
return value; \
} \
} while (false)
#define RETURN_ON_FAILED_EXECUTION(T) \
EXCEPTION_BAILOUT_CHECK_SCOPED_DO_NOT_USE(isolate, MaybeLocal<T>())
#define RETURN_ON_FAILED_EXECUTION_PRIMITIVE(T) \
EXCEPTION_BAILOUT_CHECK_SCOPED_DO_NOT_USE(isolate, Nothing<T>())
#define RETURN_TO_LOCAL_UNCHECKED(maybe_local, T) \
return maybe_local.FromMaybe(Local<T>());
#define RETURN_ESCAPED(value) return handle_scope.Escape(value);
namespace {
Local<Context> ContextFromHeapObject(i::Handle<i::Object> obj) {
return reinterpret_cast<v8::Isolate*>(i::HeapObject::cast(*obj)->GetIsolate())
->GetCurrentContext();
}
class InternalEscapableScope : public v8::EscapableHandleScope {
public:
explicit inline InternalEscapableScope(i::Isolate* isolate)
: v8::EscapableHandleScope(reinterpret_cast<v8::Isolate*>(isolate)) {}
};
// TODO(jochen): This should be #ifdef DEBUG
#ifdef V8_CHECK_MICROTASKS_SCOPES_CONSISTENCY
void CheckMicrotasksScopesConsistency(i::Isolate* isolate) {
auto handle_scope_implementer = isolate->handle_scope_implementer();
if (handle_scope_implementer->microtasks_policy() ==
v8::MicrotasksPolicy::kScoped) {
DCHECK(handle_scope_implementer->GetMicrotasksScopeDepth() ||
!handle_scope_implementer->DebugMicrotasksScopeDepthIsZero());
}
}
#endif
template <bool do_callback>
class CallDepthScope {
public:
explicit CallDepthScope(i::Isolate* isolate, Local<Context> context)
: isolate_(isolate), context_(context), escaped_(false) {
// TODO(dcarney): remove this when blink stops crashing.
DCHECK(!isolate_->external_caught_exception());
isolate_->handle_scope_implementer()->IncrementCallDepth();
if (!context.IsEmpty()) {
i::Handle<i::Context> env = Utils::OpenHandle(*context);
i::HandleScopeImplementer* impl = isolate->handle_scope_implementer();
if (isolate->context() != nullptr &&
isolate->context()->native_context() == env->native_context()) {
context_ = Local<Context>();
} else {
impl->SaveContext(isolate->context());
isolate->set_context(*env);
}
}
if (do_callback) isolate_->FireBeforeCallEnteredCallback();
}
~CallDepthScope() {
if (!context_.IsEmpty()) {
i::HandleScopeImplementer* impl = isolate_->handle_scope_implementer();
isolate_->set_context(impl->RestoreContext());
}
if (!escaped_) isolate_->handle_scope_implementer()->DecrementCallDepth();
if (do_callback) isolate_->FireCallCompletedCallback();
// TODO(jochen): This should be #ifdef DEBUG
#ifdef V8_CHECK_MICROTASKS_SCOPES_CONSISTENCY
if (do_callback) CheckMicrotasksScopesConsistency(isolate_);
#endif
}
void Escape() {
DCHECK(!escaped_);
escaped_ = true;
auto handle_scope_implementer = isolate_->handle_scope_implementer();
handle_scope_implementer->DecrementCallDepth();
bool call_depth_is_zero = handle_scope_implementer->CallDepthIsZero();
isolate_->OptionalRescheduleException(call_depth_is_zero);
}
private:
i::Isolate* const isolate_;
Local<Context> context_;
bool escaped_;
bool do_callback_;
};
} // namespace
static ScriptOrigin GetScriptOriginForScript(i::Isolate* isolate,
i::Handle<i::Script> script) {
i::Handle<i::Object> scriptName(script->GetNameOrSourceURL(), isolate);
i::Handle<i::Object> source_map_url(script->source_mapping_url(), isolate);
i::Handle<i::FixedArray> host_defined_options(script->host_defined_options(),
isolate);
v8::Isolate* v8_isolate =
reinterpret_cast<v8::Isolate*>(script->GetIsolate());
ScriptOriginOptions options(script->origin_options());
v8::ScriptOrigin origin(
Utils::ToLocal(scriptName),
v8::Integer::New(v8_isolate, script->line_offset()),
v8::Integer::New(v8_isolate, script->column_offset()),
v8::Boolean::New(v8_isolate, options.IsSharedCrossOrigin()),
v8::Integer::New(v8_isolate, script->id()),
Utils::ToLocal(source_map_url),
v8::Boolean::New(v8_isolate, options.IsOpaque()),
v8::Boolean::New(v8_isolate, script->type() == i::Script::TYPE_WASM),
v8::Boolean::New(v8_isolate, options.IsModule()),
Utils::ToLocal(host_defined_options));
return origin;
}
// --- E x c e p t i o n B e h a v i o r ---
void i::FatalProcessOutOfMemory(const char* location) {
i::V8::FatalProcessOutOfMemory(location, false);
}
// When V8 cannot allocate memory FatalProcessOutOfMemory is called. The default
// OOM error handler is called and execution is stopped.
void i::V8::FatalProcessOutOfMemory(const char* location, bool is_heap_oom) {
i::Isolate* isolate = i::Isolate::Current();
char last_few_messages[Heap::kTraceRingBufferSize + 1];
char js_stacktrace[Heap::kStacktraceBufferSize + 1];
i::HeapStats heap_stats;
if (isolate == nullptr) {
// On a background thread -> we cannot retrieve memory information from the
// Isolate. Write easy-to-recognize values on the stack.
memset(last_few_messages, 0x0BADC0DE, Heap::kTraceRingBufferSize + 1);
memset(js_stacktrace, 0x0BADC0DE, Heap::kStacktraceBufferSize + 1);
memset(&heap_stats, 0xBADC0DE, sizeof(heap_stats));
// Note that the embedder's oom handler won't be called in this case. We
// just crash.
FATAL("API fatal error handler returned after process out of memory");
return;
}
memset(last_few_messages, 0, Heap::kTraceRingBufferSize + 1);
memset(js_stacktrace, 0, Heap::kStacktraceBufferSize + 1);
intptr_t start_marker;
heap_stats.start_marker = &start_marker;
size_t new_space_size;
heap_stats.new_space_size = &new_space_size;
size_t new_space_capacity;
heap_stats.new_space_capacity = &new_space_capacity;
size_t old_space_size;
heap_stats.old_space_size = &old_space_size;
size_t old_space_capacity;
heap_stats.old_space_capacity = &old_space_capacity;
size_t code_space_size;
heap_stats.code_space_size = &code_space_size;
size_t code_space_capacity;
heap_stats.code_space_capacity = &code_space_capacity;
size_t map_space_size;
heap_stats.map_space_size = &map_space_size;
size_t map_space_capacity;
heap_stats.map_space_capacity = &map_space_capacity;
size_t lo_space_size;
heap_stats.lo_space_size = &lo_space_size;
size_t global_handle_count;
heap_stats.global_handle_count = &global_handle_count;
size_t weak_global_handle_count;
heap_stats.weak_global_handle_count = &weak_global_handle_count;
size_t pending_global_handle_count;
heap_stats.pending_global_handle_count = &pending_global_handle_count;
size_t near_death_global_handle_count;
heap_stats.near_death_global_handle_count = &near_death_global_handle_count;
size_t free_global_handle_count;
heap_stats.free_global_handle_count = &free_global_handle_count;
size_t memory_allocator_size;
heap_stats.memory_allocator_size = &memory_allocator_size;
size_t memory_allocator_capacity;
heap_stats.memory_allocator_capacity = &memory_allocator_capacity;
size_t malloced_memory;
heap_stats.malloced_memory = &malloced_memory;
size_t malloced_peak_memory;
heap_stats.malloced_peak_memory = &malloced_peak_memory;
size_t objects_per_type[LAST_TYPE + 1] = {0};
heap_stats.objects_per_type = objects_per_type;
size_t size_per_type[LAST_TYPE + 1] = {0};
heap_stats.size_per_type = size_per_type;
int os_error;
heap_stats.os_error = &os_error;
heap_stats.last_few_messages = last_few_messages;
heap_stats.js_stacktrace = js_stacktrace;
intptr_t end_marker;
heap_stats.end_marker = &end_marker;
if (isolate->heap()->HasBeenSetUp()) {
// BUG(1718): Don't use the take_snapshot since we don't support
// HeapIterator here without doing a special GC.
isolate->heap()->RecordStats(&heap_stats, false);
char* first_newline = strchr(last_few_messages, '\n');
if (first_newline == nullptr || first_newline[1] == '\0')
first_newline = last_few_messages;
PrintF("\n<--- Last few GCs --->\n%s\n", first_newline);
PrintF("\n<--- JS stacktrace --->\n%s\n", js_stacktrace);
}
Utils::ReportOOMFailure(location, is_heap_oom);
// If the fatal error handler returns, we stop execution.
FATAL("API fatal error handler returned after process out of memory");
}
void Utils::ReportApiFailure(const char* location, const char* message) {
i::Isolate* isolate = i::Isolate::Current();
FatalErrorCallback callback = nullptr;
if (isolate != nullptr) {
callback = isolate->exception_behavior();
}
if (callback == nullptr) {
base::OS::PrintError("\n#\n# Fatal error in %s\n# %s\n#\n\n", location,
message);
base::OS::Abort();
} else {
callback(location, message);
}
isolate->SignalFatalError();
}
void Utils::ReportOOMFailure(const char* location, bool is_heap_oom) {
i::Isolate* isolate = i::Isolate::Current();
OOMErrorCallback oom_callback = isolate->oom_behavior();
if (oom_callback == nullptr) {
// TODO(wfh): Remove this fallback once Blink is setting OOM handler. See
// crbug.com/614440.
FatalErrorCallback fatal_callback = isolate->exception_behavior();
if (fatal_callback == nullptr) {
base::OS::PrintError("\n#\n# Fatal %s OOM in %s\n#\n\n",
is_heap_oom ? "javascript" : "process", location);
base::OS::Abort();
} else {
fatal_callback(location,
is_heap_oom
? "Allocation failed - JavaScript heap out of memory"
: "Allocation failed - process out of memory");
}
} else {
oom_callback(location, is_heap_oom);
}
isolate->SignalFatalError();
}
static inline bool IsExecutionTerminatingCheck(i::Isolate* isolate) {
if (isolate->has_scheduled_exception()) {
return isolate->scheduled_exception() ==
isolate->heap()->termination_exception();
}
return false;
}
void V8::SetNativesDataBlob(StartupData* natives_blob) {
i::V8::SetNativesBlob(natives_blob);
}
void V8::SetSnapshotDataBlob(StartupData* snapshot_blob) {
i::V8::SetSnapshotBlob(snapshot_blob);
}
void* v8::ArrayBuffer::Allocator::Reserve(size_t length) { UNIMPLEMENTED(); }
void v8::ArrayBuffer::Allocator::Free(void* data, size_t length,
AllocationMode mode) {
switch (mode) {
case AllocationMode::kNormal: {
Free(data, length);
return;
}
case AllocationMode::kReservation: {
UNIMPLEMENTED();
return;
}
}
}
void v8::ArrayBuffer::Allocator::SetProtection(
void* data, size_t length,
v8::ArrayBuffer::Allocator::Protection protection) {
UNIMPLEMENTED();
}
namespace {
class ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
public:
virtual void* Allocate(size_t length) {
#if V8_OS_AIX && _LINUX_SOURCE_COMPAT
// Work around for GCC bug on AIX
// See: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79839
void* data = __linux_calloc(length, 1);
#else
void* data = calloc(length, 1);
#endif
return data;
}
virtual void* AllocateUninitialized(size_t length) {
#if V8_OS_AIX && _LINUX_SOURCE_COMPAT
// Work around for GCC bug on AIX
// See: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79839
void* data = __linux_malloc(length);
#else
void* data = malloc(length);
#endif
return data;
}
virtual void Free(void* data, size_t) { free(data); }
virtual void* Reserve(size_t length) {
size_t page_size = i::AllocatePageSize();
size_t allocated = RoundUp(length, page_size);
void* address = i::AllocatePages(i::GetRandomMmapAddr(), allocated,
page_size, PageAllocator::kNoAccess);
return address;
}
virtual void Free(void* data, size_t length,
v8::ArrayBuffer::Allocator::AllocationMode mode) {
switch (mode) {
case v8::ArrayBuffer::Allocator::AllocationMode::kNormal: {
return Free(data, length);
}
case v8::ArrayBuffer::Allocator::AllocationMode::kReservation: {
size_t page_size = i::AllocatePageSize();
size_t allocated = RoundUp(length, page_size);
CHECK(i::FreePages(data, allocated));
return;
}
}
}
virtual void SetProtection(
void* data, size_t length,
v8::ArrayBuffer::Allocator::Protection protection) {
DCHECK(protection == v8::ArrayBuffer::Allocator::Protection::kNoAccess ||
protection == v8::ArrayBuffer::Allocator::Protection::kReadWrite);
PageAllocator::Permission permission =
(protection == v8::ArrayBuffer::Allocator::Protection::kReadWrite)
? PageAllocator::kReadWrite
: PageAllocator::kNoAccess;
CHECK(i::SetPermissions(data, length, permission));
}
};
bool RunExtraCode(Isolate* isolate, Local<Context> context,
const char* utf8_source, const char* name) {
base::ElapsedTimer timer;
timer.Start();
Context::Scope context_scope(context);
TryCatch try_catch(isolate);
Local<String> source_string;
if (!String::NewFromUtf8(isolate, utf8_source, NewStringType::kNormal)
.ToLocal(&source_string)) {
return false;
}
Local<String> resource_name =
String::NewFromUtf8(isolate, name, NewStringType::kNormal)
.ToLocalChecked();
ScriptOrigin origin(resource_name);
ScriptCompiler::Source source(source_string, origin);
Local<Script> script;
if (!ScriptCompiler::Compile(context, &source).ToLocal(&script)) return false;
if (script->Run(context).IsEmpty()) return false;
if (i::FLAG_profile_deserialization) {
i::PrintF("Executing custom snapshot script %s took %0.3f ms\n", name,
timer.Elapsed().InMillisecondsF());
}
timer.Stop();
CHECK(!try_catch.HasCaught());
return true;
}
struct SnapshotCreatorData {
explicit SnapshotCreatorData(Isolate* isolate)
: isolate_(isolate),
default_context_(),
contexts_(isolate),
created_(false) {}
static SnapshotCreatorData* cast(void* data) {
return reinterpret_cast<SnapshotCreatorData*>(data);
}
ArrayBufferAllocator allocator_;
Isolate* isolate_;
Persistent<Context> default_context_;
SerializeInternalFieldsCallback default_embedder_fields_serializer_;
PersistentValueVector<Context> contexts_;
std::vector<SerializeInternalFieldsCallback> embedder_fields_serializers_;
bool created_;
};
} // namespace
SnapshotCreator::SnapshotCreator(const intptr_t* external_references,
StartupData* existing_snapshot) {
i::Isolate* internal_isolate = new i::Isolate(true);
Isolate* isolate = reinterpret_cast<Isolate*>(internal_isolate);
SnapshotCreatorData* data = new SnapshotCreatorData(isolate);
data->isolate_ = isolate;
internal_isolate->set_array_buffer_allocator(&data->allocator_);
internal_isolate->set_api_external_references(external_references);
isolate->Enter();
const StartupData* blob = existing_snapshot
? existing_snapshot
: i::Snapshot::DefaultSnapshotBlob();
if (blob && blob->raw_size > 0) {
internal_isolate->set_snapshot_blob(blob);
i::Snapshot::Initialize(internal_isolate);
} else {
internal_isolate->Init(nullptr);
}
data_ = data;
}
SnapshotCreator::~SnapshotCreator() {
SnapshotCreatorData* data = SnapshotCreatorData::cast(data_);
DCHECK(data->created_);
Isolate* isolate = data->isolate_;
isolate->Exit();
isolate->Dispose();
delete data;
}
Isolate* SnapshotCreator::GetIsolate() {
return SnapshotCreatorData::cast(data_)->isolate_;
}
void SnapshotCreator::SetDefaultContext(
Local<Context> context, SerializeInternalFieldsCallback callback) {
DCHECK(!context.IsEmpty());
SnapshotCreatorData* data = SnapshotCreatorData::cast(data_);
DCHECK(!data->created_);
DCHECK(data->default_context_.IsEmpty());
Isolate* isolate = data->isolate_;
CHECK_EQ(isolate, context->GetIsolate());
data->default_context_.Reset(isolate, context);
data->default_embedder_fields_serializer_ = callback;
}
size_t SnapshotCreator::AddContext(Local<Context> context,
SerializeInternalFieldsCallback callback) {
DCHECK(!context.IsEmpty());
SnapshotCreatorData* data = SnapshotCreatorData::cast(data_);
DCHECK(!data->created_);
Isolate* isolate = data->isolate_;
CHECK_EQ(isolate, context->GetIsolate());
size_t index = data->contexts_.Size();
data->contexts_.Append(context);
data->embedder_fields_serializers_.push_back(callback);
return index;
}
size_t SnapshotCreator::AddTemplate(Local<Template> template_obj) {
return AddData(template_obj);
}
size_t SnapshotCreator::AddData(i::Object* object) {
DCHECK_NOT_NULL(object);
SnapshotCreatorData* data = SnapshotCreatorData::cast(data_);
DCHECK(!data->created_);
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(data->isolate_);
i::HandleScope scope(isolate);
i::Handle<i::Object> obj(object, isolate);
i::Handle<i::ArrayList> list;
if (!isolate->heap()->serialized_objects()->IsArrayList()) {
list = i::ArrayList::New(isolate, 1);
} else {
list = i::Handle<i::ArrayList>(
i::ArrayList::cast(isolate->heap()->serialized_objects()));
}
size_t index = static_cast<size_t>(list->Length());
list = i::ArrayList::Add(list, obj);
isolate->heap()->SetSerializedObjects(*list);
return index;
}
size_t SnapshotCreator::AddData(Local<Context> context, i::Object* object) {
DCHECK_NOT_NULL(object);
DCHECK(!SnapshotCreatorData::cast(data_)->created_);
i::Handle<i::Context> ctx = Utils::OpenHandle(*context);
i::Isolate* isolate = ctx->GetIsolate();
i::HandleScope scope(isolate);
i::Handle<i::Object> obj(object, isolate);
i::Handle<i::ArrayList> list;
if (!ctx->serialized_objects()->IsArrayList()) {
list = i::ArrayList::New(isolate, 1);
} else {
list =
i::Handle<i::ArrayList>(i::ArrayList::cast(ctx->serialized_objects()));
}
size_t index = static_cast<size_t>(list->Length());
list = i::ArrayList::Add(list, obj);
ctx->set_serialized_objects(*list);
return index;
}
namespace {
void ConvertSerializedObjectsToFixedArray(Local<Context> context) {
i::Handle<i::Context> ctx = Utils::OpenHandle(*context);
i::Isolate* isolate = ctx->GetIsolate();
if (!ctx->serialized_objects()->IsArrayList()) {
ctx->set_serialized_objects(isolate->heap()->empty_fixed_array());
} else {
i::Handle<i::ArrayList> list(i::ArrayList::cast(ctx->serialized_objects()));
i::Handle<i::FixedArray> elements = i::ArrayList::Elements(list);
ctx->set_serialized_objects(*elements);
}
}
void ConvertSerializedObjectsToFixedArray(i::Isolate* isolate) {
if (!isolate->heap()->serialized_objects()->IsArrayList()) {
isolate->heap()->SetSerializedObjects(isolate->heap()->empty_fixed_array());
} else {
i::Handle<i::ArrayList> list(
i::ArrayList::cast(isolate->heap()->serialized_objects()));
i::Handle<i::FixedArray> elements = i::ArrayList::Elements(list);
isolate->heap()->SetSerializedObjects(*elements);
}
}
} // anonymous namespace
StartupData SnapshotCreator::CreateBlob(
SnapshotCreator::FunctionCodeHandling function_code_handling) {
SnapshotCreatorData* data = SnapshotCreatorData::cast(data_);
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(data->isolate_);
DCHECK(!data->created_);
DCHECK(!data->default_context_.IsEmpty());
int num_additional_contexts = static_cast<int>(data->contexts_.Size());
{
i::HandleScope scope(isolate);
// Convert list of context-independent data to FixedArray.
ConvertSerializedObjectsToFixedArray(isolate);
// Convert lists of context-dependent data to FixedArray.
ConvertSerializedObjectsToFixedArray(
data->default_context_.Get(data->isolate_));
for (int i = 0; i < num_additional_contexts; i++) {
ConvertSerializedObjectsToFixedArray(data->contexts_.Get(i));
}
// We need to store the global proxy size upfront in case we need the
// bootstrapper to create a global proxy before we deserialize the context.
i::Handle<i::FixedArray> global_proxy_sizes =
isolate->factory()->NewFixedArray(num_additional_contexts, i::TENURED);
for (int i = 0; i < num_additional_contexts; i++) {
i::Handle<i::Context> context =
v8::Utils::OpenHandle(*data->contexts_.Get(i));
global_proxy_sizes->set(i,
i::Smi::FromInt(context->global_proxy()->Size()));
}
isolate->heap()->SetSerializedGlobalProxySizes(*global_proxy_sizes);
}
// We might rehash strings and re-sort descriptors. Clear the lookup cache.
isolate->descriptor_lookup_cache()->Clear();
// If we don't do this then we end up with a stray root pointing at the
// context even after we have disposed of the context.
isolate->heap()->CollectAllAvailableGarbage(
i::GarbageCollectionReason::kSnapshotCreator);
isolate->heap()->CompactWeakFixedArrays();
i::DisallowHeapAllocation no_gc_from_here_on;
int num_contexts = num_additional_contexts + 1;
std::vector<i::Context*> contexts;
contexts.reserve(num_contexts);
{
i::HandleScope scope(isolate);
contexts.push_back(
*v8::Utils::OpenHandle(*data->default_context_.Get(data->isolate_)));
data->default_context_.Reset();
for (int i = 0; i < num_additional_contexts; i++) {
i::Handle<i::Context> context =
v8::Utils::OpenHandle(*data->contexts_.Get(i));
contexts.push_back(*context);
}
data->contexts_.Clear();
}
// Check that values referenced by global/eternal handles are accounted for.
i::SerializedHandleChecker handle_checker(isolate, &contexts);
CHECK(handle_checker.CheckGlobalAndEternalHandles());
// Complete in-object slack tracking for all functions.
i::HeapIterator heap_iterator(isolate->heap());
while (i::HeapObject* current_obj = heap_iterator.next()) {
if (!current_obj->IsJSFunction()) continue;
i::JSFunction* fun = i::JSFunction::cast(current_obj);
fun->CompleteInobjectSlackTrackingIfActive();
}
i::StartupSerializer startup_serializer(isolate, function_code_handling);
startup_serializer.SerializeStrongReferences();
// Serialize each context with a new partial serializer.
std::vector<i::SnapshotData*> context_snapshots;
context_snapshots.reserve(num_contexts);
// TODO(6593): generalize rehashing, and remove this flag.
bool can_be_rehashed = true;
for (int i = 0; i < num_contexts; i++) {
bool is_default_context = i == 0;
i::PartialSerializer partial_serializer(
isolate, &startup_serializer,
is_default_context ? data->default_embedder_fields_serializer_
: data->embedder_fields_serializers_[i - 1]);
partial_serializer.Serialize(&contexts[i], !is_default_context);
can_be_rehashed = can_be_rehashed && partial_serializer.can_be_rehashed();
context_snapshots.push_back(new i::SnapshotData(&partial_serializer));
}
// Builtin serialization places additional objects into the partial snapshot
// cache and thus needs to happen before SerializeWeakReferencesAndDeferred
// is called below.
i::BuiltinSerializer builtin_serializer(isolate, &startup_serializer);
builtin_serializer.SerializeBuiltinsAndHandlers();
startup_serializer.SerializeWeakReferencesAndDeferred();
can_be_rehashed = can_be_rehashed && startup_serializer.can_be_rehashed();
i::SnapshotData startup_snapshot(&startup_serializer);
i::BuiltinSnapshotData builtin_snapshot(&builtin_serializer);
StartupData result = i::Snapshot::CreateSnapshotBlob(
&startup_snapshot, &builtin_snapshot, context_snapshots, can_be_rehashed);
// Delete heap-allocated context snapshot instances.
for (const auto context_snapshot : context_snapshots) {
delete context_snapshot;
}
data->created_ = true;
return result;
}
StartupData V8::CreateSnapshotDataBlob(const char* embedded_source) {
// Create a new isolate and a new context from scratch, optionally run
// a script to embed, and serialize to create a snapshot blob.
StartupData result = {nullptr, 0};
base::ElapsedTimer timer;
timer.Start();
{
SnapshotCreator snapshot_creator;
Isolate* isolate = snapshot_creator.GetIsolate();
{
HandleScope scope(isolate);
Local<Context> context = Context::New(isolate);
if (embedded_source != nullptr &&
!RunExtraCode(isolate, context, embedded_source, "<embedded>")) {
return result;
}
snapshot_creator.SetDefaultContext(context);
}
result = snapshot_creator.CreateBlob(
SnapshotCreator::FunctionCodeHandling::kClear);
}
if (i::FLAG_profile_deserialization) {
i::PrintF("Creating snapshot took %0.3f ms\n",
timer.Elapsed().InMillisecondsF());
}
timer.Stop();
return result;
}
StartupData V8::WarmUpSnapshotDataBlob(StartupData cold_snapshot_blob,
const char* warmup_source) {
CHECK(cold_snapshot_blob.raw_size > 0 && cold_snapshot_blob.data != nullptr);
CHECK_NOT_NULL(warmup_source);
// Use following steps to create a warmed up snapshot blob from a cold one:
// - Create a new isolate from the cold snapshot.
// - Create a new context to run the warmup script. This will trigger
// compilation of executed functions.
// - Create a new context. This context will be unpolluted.
// - Serialize the isolate and the second context into a new snapshot blob.
StartupData result = {nullptr, 0};
base::ElapsedTimer timer;
timer.Start();
{
SnapshotCreator snapshot_creator(nullptr, &cold_snapshot_blob);
Isolate* isolate = snapshot_creator.GetIsolate();
{
HandleScope scope(isolate);
Local<Context> context = Context::New(isolate);
if (!RunExtraCode(isolate, context, warmup_source, "<warm-up>")) {
return result;
}
}
{
HandleScope handle_scope(isolate);
isolate->ContextDisposedNotification(false);
Local<Context> context = Context::New(isolate);
snapshot_creator.SetDefaultContext(context);
}
result = snapshot_creator.CreateBlob(
SnapshotCreator::FunctionCodeHandling::kKeep);
}
if (i::FLAG_profile_deserialization) {
i::PrintF("Warming up snapshot took %0.3f ms\n",
timer.Elapsed().InMillisecondsF());
}
timer.Stop();
return result;
}
void V8::SetDcheckErrorHandler(DcheckErrorCallback that) {
v8::base::SetDcheckFunction(that);
}
void V8::SetFlagsFromString(const char* str, int length) {
i::FlagList::SetFlagsFromString(str, length);
i::FlagList::EnforceFlagImplications();
}
void V8::SetFlagsFromCommandLine(int* argc, char** argv, bool remove_flags) {
i::FlagList::SetFlagsFromCommandLine(argc, argv, remove_flags);
}
RegisteredExtension* RegisteredExtension::first_extension_ = nullptr;
RegisteredExtension::RegisteredExtension(Extension* extension)
: extension_(extension) { }
void RegisteredExtension::Register(RegisteredExtension* that) {
that->next_ = first_extension_;
first_extension_ = that;
}
void RegisteredExtension::UnregisterAll() {
RegisteredExtension* re = first_extension_;
while (re != nullptr) {
RegisteredExtension* next = re->next();
delete re;
re = next;
}
first_extension_ = nullptr;
}
void RegisterExtension(Extension* that) {
RegisteredExtension* extension = new RegisteredExtension(that);
RegisteredExtension::Register(extension);
}
Extension::Extension(const char* name,
const char* source,
int dep_count,
const char** deps,
int source_length)
: name_(name),
source_length_(source_length >= 0 ?
source_length :
(source ? static_cast<int>(strlen(source)) : 0)),
source_(source, source_length_),
dep_count_(dep_count),
deps_(deps),
auto_enable_(false) {
CHECK(source != nullptr || source_length_ == 0);
}
ResourceConstraints::ResourceConstraints()
: max_semi_space_size_in_kb_(0),
max_old_space_size_(0),
stack_limit_(nullptr),
code_range_size_(0),
max_zone_pool_size_(0) {}
void ResourceConstraints::ConfigureDefaults(uint64_t physical_memory,
uint64_t virtual_memory_limit) {
set_max_semi_space_size_in_kb(
i::Heap::ComputeMaxSemiSpaceSize(physical_memory));
set_max_old_space_size(
static_cast<int>(i::Heap::ComputeMaxOldGenerationSize(physical_memory)));
set_max_zone_pool_size(i::AccountingAllocator::kMaxPoolSize);
if (virtual_memory_limit > 0 && i::kRequiresCodeRange) {
// Reserve no more than 1/8 of the memory for the code range, but at most
// kMaximalCodeRangeSize.
set_code_range_size(
i::Min(i::kMaximalCodeRangeSize / i::MB,
static_cast<size_t>((virtual_memory_limit >> 3) / i::MB)));
}
}
void SetResourceConstraints(i::Isolate* isolate,
const ResourceConstraints& constraints) {
size_t semi_space_size = constraints.max_semi_space_size_in_kb();
int old_space_size = constraints.max_old_space_size();
size_t code_range_size = constraints.code_range_size();
size_t max_pool_size = constraints.max_zone_pool_size();
if (semi_space_size != 0 || old_space_size != 0 || code_range_size != 0) {
isolate->heap()->ConfigureHeap(semi_space_size, old_space_size,
code_range_size);
}
isolate->allocator()->ConfigureSegmentPool(max_pool_size);
if (constraints.stack_limit() != nullptr) {
uintptr_t limit = reinterpret_cast<uintptr_t>(constraints.stack_limit());
isolate->stack_guard()->SetStackLimit(limit);
}
}
i::Object** V8::GlobalizeReference(i::Isolate* isolate, i::Object** obj) {
LOG_API(isolate, Persistent, New);
i::Handle<i::Object> result = isolate->global_handles()->Create(*obj);
#ifdef VERIFY_HEAP
if (i::FLAG_verify_heap) {
(*obj)->ObjectVerify();
}
#endif // VERIFY_HEAP
return result.location();
}
i::Object** V8::CopyPersistent(i::Object** obj) {
i::Handle<i::Object> result = i::GlobalHandles::CopyGlobal(obj);
#ifdef VERIFY_HEAP
if (i::FLAG_verify_heap) {
(*obj)->ObjectVerify();
}
#endif // VERIFY_HEAP
return result.location();
}
void V8::RegisterExternallyReferencedObject(i::Object** object,
i::Isolate* isolate) {
isolate->heap()->RegisterExternallyReferencedObject(object);
}
void V8::MakeWeak(i::Object** location, void* parameter,
int embedder_field_index1, int embedder_field_index2,
WeakCallbackInfo<void>::Callback weak_callback) {
WeakCallbackType type = WeakCallbackType::kParameter;
if (embedder_field_index1 == 0) {
if (embedder_field_index2 == 1) {
type = WeakCallbackType::kInternalFields;
} else {
DCHECK_EQ(embedder_field_index2, -1);
type = WeakCallbackType::kInternalFields;
}
} else {
DCHECK_EQ(embedder_field_index1, -1);
DCHECK_EQ(embedder_field_index2, -1);
}
i::GlobalHandles::MakeWeak(location, parameter, weak_callback, type);
}
void V8::MakeWeak(i::Object** location, void* parameter,
WeakCallbackInfo<void>::Callback weak_callback,
WeakCallbackType type) {
i::GlobalHandles::MakeWeak(location, parameter, weak_callback, type);
}
void V8::MakeWeak(i::Object*** location_addr) {
i::GlobalHandles::MakeWeak(location_addr);
}
void* V8::ClearWeak(i::Object** location) {
return i::GlobalHandles::ClearWeakness(location);
}
void V8::DisposeGlobal(i::Object** location) {
i::GlobalHandles::Destroy(location);
}
Value* V8::Eternalize(Isolate* v8_isolate, Value* value) {
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
i::Object* object = *Utils::OpenHandle(value);
int index = -1;
isolate->eternal_handles()->Create(isolate, object, &index);
return reinterpret_cast<Value*>(
isolate->eternal_handles()->Get(index).location());
}
void V8::FromJustIsNothing() {
Utils::ApiCheck(false, "v8::FromJust", "Maybe value is Nothing.");
}
void V8::ToLocalEmpty() {
Utils::ApiCheck(false, "v8::ToLocalChecked", "Empty MaybeLocal.");
}
void V8::InternalFieldOutOfBounds(int index) {
Utils::ApiCheck(0 <= index && index < kInternalFieldsInWeakCallback,
"WeakCallbackInfo::GetInternalField",
"Internal field out of bounds.");
}
// --- H a n d l e s ---
HandleScope::HandleScope(Isolate* isolate) {
Initialize(isolate);
}
void HandleScope::Initialize(Isolate* isolate) {
i::Isolate* internal_isolate = reinterpret_cast<i::Isolate*>(isolate);
// We do not want to check the correct usage of the Locker class all over the
// place, so we do it only here: Without a HandleScope, an embedder can do
// almost nothing, so it is enough to check in this central place.
// We make an exception if the serializer is enabled, which means that the
// Isolate is exclusively used to create a snapshot.
Utils::ApiCheck(
!v8::Locker::IsActive() ||
internal_isolate->thread_manager()->IsLockedByCurrentThread() ||
internal_isolate->serializer_enabled(),
"HandleScope::HandleScope",
"Entering the V8 API without proper locking in place");
i::HandleScopeData* current = internal_isolate->handle_scope_data();
isolate_ = internal_isolate;
prev_next_ = current->next;
prev_limit_ = current->limit;
current->level++;
}
HandleScope::~HandleScope() {
i::HandleScope::CloseScope(isolate_, prev_next_, prev_limit_);
}
void* HandleScope::operator new(size_t) { base::OS::Abort(); }
void* HandleScope::operator new[](size_t) { base::OS::Abort(); }
void HandleScope::operator delete(void*, size_t) { base::OS::Abort(); }
void HandleScope::operator delete[](void*, size_t) { base::OS::Abort(); }
int HandleScope::NumberOfHandles(Isolate* isolate) {
return i::HandleScope::NumberOfHandles(
reinterpret_cast<i::Isolate*>(isolate));
}
i::Object** HandleScope::CreateHandle(i::Isolate* isolate, i::Object* value) {
return i::HandleScope::CreateHandle(isolate, value);
}
i::Object** HandleScope::CreateHandle(i::HeapObject* heap_object,
i::Object* value) {
DCHECK(heap_object->IsHeapObject());
return i::HandleScope::CreateHandle(heap_object->GetIsolate(), value);
}
EscapableHandleScope::EscapableHandleScope(Isolate* v8_isolate) {
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
escape_slot_ = CreateHandle(isolate, isolate->heap()->the_hole_value());
Initialize(v8_isolate);
}
i::Object** EscapableHandleScope::Escape(i::Object** escape_value) {
i::Heap* heap = reinterpret_cast<i::Isolate*>(GetIsolate())->heap();
Utils::ApiCheck((*escape_slot_)->IsTheHole(heap->isolate()),
"EscapableHandleScope::Escape", "Escape value set twice");
if (escape_value == nullptr) {
*escape_slot_ = heap->undefined_value();
return nullptr;
}
*escape_slot_ = *escape_value;
return escape_slot_;
}
void* EscapableHandleScope::operator new(size_t) { base::OS::Abort(); }
void* EscapableHandleScope::operator new[](size_t) { base::OS::Abort(); }
void EscapableHandleScope::operator delete(void*, size_t) { base::OS::Abort(); }
void EscapableHandleScope::operator delete[](void*, size_t) {
base::OS::Abort();
}
SealHandleScope::SealHandleScope(Isolate* isolate)
: isolate_(reinterpret_cast<i::Isolate*>(isolate)) {
i::HandleScopeData* current = isolate_->handle_scope_data();
prev_limit_ = current->limit;
current->limit = current->next;
prev_sealed_level_ = current->sealed_level;
current->sealed_level = current->level;
}
SealHandleScope::~SealHandleScope() {
i::HandleScopeData* current = isolate_->handle_scope_data();
DCHECK_EQ(current->next, current->limit);
current->limit = prev_limit_;
DCHECK_EQ(current->level, current->sealed_level);
current->sealed_level = prev_sealed_level_;
}
void* SealHandleScope::operator new(size_t) { base::OS::Abort(); }
void* SealHandleScope::operator new[](size_t) { base::OS::Abort(); }
void SealHandleScope::operator delete(void*, size_t) { base::OS::Abort(); }
void SealHandleScope::operator delete[](void*, size_t) { base::OS::Abort(); }
void Context::Enter() {
i::Handle<i::Context> env = Utils::OpenHandle(this);
i::Isolate* isolate = env->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
i::HandleScopeImplementer* impl = isolate->handle_scope_implementer();
impl->EnterContext(env);
impl->SaveContext(isolate->context());
isolate->set_context(*env);
}
void Context::Exit() {
i::Handle<i::Context> env = Utils::OpenHandle(this);
i::Isolate* isolate = env->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
i::HandleScopeImplementer* impl = isolate->handle_scope_implementer();
if (!Utils::ApiCheck(impl->LastEnteredContextWas(env),
"v8::Context::Exit()",
"Cannot exit non-entered context")) {
return;
}
impl->LeaveContext();
isolate->set_context(impl->RestoreContext());
}
Context::BackupIncumbentScope::BackupIncumbentScope(
Local<Context> backup_incumbent_context)
: backup_incumbent_context_(backup_incumbent_context) {
DCHECK(!backup_incumbent_context_.IsEmpty());
i::Handle<i::Context> env = Utils::OpenHandle(*backup_incumbent_context_);
i::Isolate* isolate = env->GetIsolate();
prev_ = isolate->top_backup_incumbent_scope();
isolate->set_top_backup_incumbent_scope(this);
}
Context::BackupIncumbentScope::~BackupIncumbentScope() {
i::Handle<i::Context> env = Utils::OpenHandle(*backup_incumbent_context_);
i::Isolate* isolate = env->GetIsolate();
isolate->set_top_backup_incumbent_scope(prev_);
}
static void* DecodeSmiToAligned(i::Object* value, const char* location) {
Utils::ApiCheck(value->IsSmi(), location, "Not a Smi");
return reinterpret_cast<void*>(value);
}
static i::Smi* EncodeAlignedAsSmi(void* value, const char* location) {
i::Smi* smi = reinterpret_cast<i::Smi*>(value);
Utils::ApiCheck(smi->IsSmi(), location, "Pointer is not aligned");
return smi;
}
static i::Handle<i::FixedArray> EmbedderDataFor(Context* context,
int index,
bool can_grow,
const char* location) {
i::Handle<i::Context> env = Utils::OpenHandle(context);
i::Isolate* isolate = env->GetIsolate();
bool ok =
Utils::ApiCheck(env->IsNativeContext(),
location,
"Not a native context") &&
Utils::ApiCheck(index >= 0, location, "Negative index");
if (!ok) return i::Handle<i::FixedArray>();
i::Handle<i::FixedArray> data(env->embedder_data());
if (index < data->length()) return data;
if (!Utils::ApiCheck(can_grow, location, "Index too large")) {
return i::Handle<i::FixedArray>();
}
int new_size = i::Max(index, data->length() << 1) + 1;
int grow_by = new_size - data->length();
data = isolate->factory()->CopyFixedArrayAndGrow(data, grow_by);
env->set_embedder_data(*data);
return data;
}
v8::Local<v8::Value> Context::SlowGetEmbedderData(int index) {
const char* location = "v8::Context::GetEmbedderData()";
i::Handle<i::FixedArray> data = EmbedderDataFor(this, index, false, location);
if (data.is_null()) return Local<Value>();
i::Handle<i::Object> result(data->get(index), data->GetIsolate());
return Utils::ToLocal(result);
}
void Context::SetEmbedderData(int index, v8::Local<Value> value) {
const char* location = "v8::Context::SetEmbedderData()";
i::Handle<i::FixedArray> data = EmbedderDataFor(this, index, true, location);
if (data.is_null()) return;
i::Handle<i::Object> val = Utils::OpenHandle(*value);
data->set(index, *val);
DCHECK_EQ(*Utils::OpenHandle(*value),
*Utils::OpenHandle(*GetEmbedderData(index)));
}
void* Context::SlowGetAlignedPointerFromEmbedderData(int index) {
const char* location = "v8::Context::GetAlignedPointerFromEmbedderData()";
i::Handle<i::FixedArray> data = EmbedderDataFor(this, index, false, location);
if (data.is_null()) return nullptr;
return DecodeSmiToAligned(data->get(index), location);
}
void Context::SetAlignedPointerInEmbedderData(int index, void* value) {
const char* location = "v8::Context::SetAlignedPointerInEmbedderData()";
i::Handle<i::FixedArray> data = EmbedderDataFor(this, index, true, location);
data->set(index, EncodeAlignedAsSmi(value, location));
DCHECK_EQ(value, GetAlignedPointerFromEmbedderData(index));
}
// --- T e m p l a t e ---
static void InitializeTemplate(i::Handle<i::TemplateInfo> that, int type) {
that->set_number_of_properties(0);
that->set_tag(i::Smi::FromInt(type));
}
void Template::Set(v8::Local<Name> name, v8::Local<Data> value,
v8::PropertyAttribute attribute) {
auto templ = Utils::OpenHandle(this);
i::Isolate* isolate = templ->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
i::HandleScope scope(isolate);
auto value_obj = Utils::OpenHandle(*value);
CHECK(!value_obj->IsJSReceiver() || value_obj->IsTemplateInfo());
if (value_obj->IsObjectTemplateInfo()) {
templ->set_serial_number(i::Smi::kZero);
if (templ->IsFunctionTemplateInfo()) {
i::Handle<i::FunctionTemplateInfo>::cast(templ)->set_do_not_cache(true);
}
}
i::ApiNatives::AddDataProperty(isolate, templ, Utils::OpenHandle(*name),
value_obj,
static_cast<i::PropertyAttributes>(attribute));
}
void Template::SetPrivate(v8::Local<Private> name, v8::Local<Data> value,
v8::PropertyAttribute attribute) {
Set(Utils::ToLocal(Utils::OpenHandle(reinterpret_cast<Name*>(*name))), value,
attribute);
}
void Template::SetAccessorProperty(
v8::Local<v8::Name> name,
v8::Local<FunctionTemplate> getter,
v8::Local<FunctionTemplate> setter,
v8::PropertyAttribute attribute,
v8::AccessControl access_control) {
// TODO(verwaest): Remove |access_control|.
DCHECK_EQ(v8::DEFAULT, access_control);
auto templ = Utils::OpenHandle(this);
auto isolate = templ->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
DCHECK(!name.IsEmpty());
DCHECK(!getter.IsEmpty() || !setter.IsEmpty());
i::HandleScope scope(isolate);
i::ApiNatives::AddAccessorProperty(
isolate, templ, Utils::OpenHandle(*name),
Utils::OpenHandle(*getter, true), Utils::OpenHandle(*setter, true),
static_cast<i::PropertyAttributes>(attribute));
}
// --- F u n c t i o n T e m p l a t e ---
static void InitializeFunctionTemplate(
i::Handle<i::FunctionTemplateInfo> info) {
InitializeTemplate(info, Consts::FUNCTION_TEMPLATE);
info->set_flag(0);
}
static Local<ObjectTemplate> ObjectTemplateNew(
i::Isolate* isolate, v8::Local<FunctionTemplate> constructor,
bool do_not_cache);
Local<ObjectTemplate> FunctionTemplate::PrototypeTemplate() {
i::Isolate* i_isolate = Utils::OpenHandle(this)->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(i_isolate);
i::Handle<i::Object> result(Utils::OpenHandle(this)->prototype_template(),
i_isolate);
if (result->IsUndefined(i_isolate)) {
// Do not cache prototype objects.
result = Utils::OpenHandle(
*ObjectTemplateNew(i_isolate, Local<FunctionTemplate>(), true));
Utils::OpenHandle(this)->set_prototype_template(*result);
}
return ToApiHandle<ObjectTemplate>(result);
}
void FunctionTemplate::SetPrototypeProviderTemplate(
Local<FunctionTemplate> prototype_provider) {
i::Isolate* i_isolate = Utils::OpenHandle(this)->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(i_isolate);
i::Handle<i::Object> result = Utils::OpenHandle(*prototype_provider);
auto info = Utils::OpenHandle(this);
CHECK(info->prototype_template()->IsUndefined(i_isolate));
CHECK(info->parent_template()->IsUndefined(i_isolate));
info->set_prototype_provider_template(*result);
}
static void EnsureNotInstantiated(i::Handle<i::FunctionTemplateInfo> info,
const char* func) {
Utils::ApiCheck(!info->instantiated(), func,
"FunctionTemplate already instantiated");
}
void FunctionTemplate::Inherit(v8::Local<FunctionTemplate> value) {
auto info = Utils::OpenHandle(this);
EnsureNotInstantiated(info, "v8::FunctionTemplate::Inherit");
i::Isolate* i_isolate = info->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(i_isolate);
CHECK(info->prototype_provider_template()->IsUndefined(i_isolate));
info->set_parent_template(*Utils::OpenHandle(*value));
}
static Local<FunctionTemplate> FunctionTemplateNew(
i::Isolate* isolate, FunctionCallback callback, v8::Local<Value> data,
v8::Local<Signature> signature, int length, bool do_not_cache,
v8::Local<Private> cached_property_name = v8::Local<Private>()) {
i::Handle<i::Struct> struct_obj =
isolate->factory()->NewStruct(i::FUNCTION_TEMPLATE_INFO_TYPE, i::TENURED);
i::Handle<i::FunctionTemplateInfo> obj =
i::Handle<i::FunctionTemplateInfo>::cast(struct_obj);
InitializeFunctionTemplate(obj);
obj->set_do_not_cache(do_not_cache);
int next_serial_number = i::FunctionTemplateInfo::kInvalidSerialNumber;
if (!do_not_cache) {
next_serial_number = isolate->heap()->GetNextTemplateSerialNumber();
}
obj->set_serial_number(i::Smi::FromInt(next_serial_number));
if (callback != 0) {
Utils::ToLocal(obj)->SetCallHandler(callback, data);
}
obj->set_length(length);
obj->set_undetectable(false);
obj->set_needs_access_check(false);
obj->set_accept_any_receiver(true);
if (!signature.IsEmpty()) {
obj->set_signature(*Utils::OpenHandle(*signature));
}
obj->set_cached_property_name(
cached_property_name.IsEmpty()
? isolate->heap()->the_hole_value()
: *Utils::OpenHandle(*cached_property_name));
return Utils::ToLocal(obj);
}
Local<FunctionTemplate> FunctionTemplate::New(
Isolate* isolate, FunctionCallback callback, v8::Local<Value> data,
v8::Local<Signature> signature, int length, ConstructorBehavior behavior) {
i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
// Changes to the environment cannot be captured in the snapshot. Expect no
// function templates when the isolate is created for serialization.
LOG_API(i_isolate, FunctionTemplate, New);
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(i_isolate);
auto templ =
FunctionTemplateNew(i_isolate, callback, data, signature, length, false);
if (behavior == ConstructorBehavior::kThrow) templ->RemovePrototype();
return templ;
}
MaybeLocal<FunctionTemplate> FunctionTemplate::FromSnapshot(Isolate* isolate,
size_t index) {
i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
i::FixedArray* serialized_objects = i_isolate->heap()->serialized_objects();
int int_index = static_cast<int>(index);
if (int_index < serialized_objects->length()) {
i::Object* info = serialized_objects->get(int_index);
if (info->IsFunctionTemplateInfo()) {
return Utils::ToLocal(i::Handle<i::FunctionTemplateInfo>(
i::FunctionTemplateInfo::cast(info)));
}
}
return Local<FunctionTemplate>();
}
Local<FunctionTemplate> FunctionTemplate::NewWithCache(
Isolate* isolate, FunctionCallback callback, Local<Private> cache_property,
Local<Value> data, Local<Signature> signature, int length) {
i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
LOG_API(i_isolate, FunctionTemplate, NewWithCache);
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(i_isolate);
return FunctionTemplateNew(i_isolate, callback, data, signature, length,
false, cache_property);
}
Local<Signature> Signature::New(Isolate* isolate,
Local<FunctionTemplate> receiver) {
return Utils::SignatureToLocal(Utils::OpenHandle(*receiver));
}
Local<AccessorSignature> AccessorSignature::New(
Isolate* isolate, Local<FunctionTemplate> receiver) {
return Utils::AccessorSignatureToLocal(Utils::OpenHandle(*receiver));
}
#define SET_FIELD_WRAPPED(obj, setter, cdata) do { \
i::Handle<i::Object> foreign = FromCData(obj->GetIsolate(), cdata); \
(obj)->setter(*foreign); \
} while (false)
void FunctionTemplate::SetCallHandler(FunctionCallback callback,
v8::Local<Value> data) {
auto info = Utils::OpenHandle(this);
EnsureNotInstantiated(info, "v8::FunctionTemplate::SetCallHandler");
i::Isolate* isolate = info->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
i::HandleScope scope(isolate);
i::Handle<i::Struct> struct_obj =
isolate->factory()->NewStruct(i::TUPLE3_TYPE, i::TENURED);
i::Handle<i::CallHandlerInfo> obj =
i::Handle<i::CallHandlerInfo>::cast(struct_obj);
SET_FIELD_WRAPPED(obj, set_callback, callback);
SET_FIELD_WRAPPED(obj, set_js_callback, obj->redirected_callback());
if (data.IsEmpty()) {
data = v8::Undefined(reinterpret_cast<v8::Isolate*>(isolate));
}
obj->set_data(*Utils::OpenHandle(*data));
info->set_call_code(*obj);
}
namespace {
template <typename Getter, typename Setter>
i::Handle<i::AccessorInfo> MakeAccessorInfo(
i::Isolate* isolate, v8::Local<Name> name, Getter getter, Setter setter,
v8::Local<Value> data, v8::AccessControl settings,
v8::Local<AccessorSignature> signature, bool is_special_data_property,
bool replace_on_access) {
i::Handle<i::AccessorInfo> obj = isolate->factory()->NewAccessorInfo();
SET_FIELD_WRAPPED(obj, set_getter, getter);
DCHECK_IMPLIES(replace_on_access,
is_special_data_property && setter == nullptr);
if (is_special_data_property && setter == nullptr) {
setter = reinterpret_cast<Setter>(&i::Accessors::ReconfigureToDataProperty);
}
SET_FIELD_WRAPPED(obj, set_setter, setter);
i::Address redirected = obj->redirected_getter();
if (redirected != nullptr) SET_FIELD_WRAPPED(obj, set_js_getter, redirected);
if (data.IsEmpty()) {
data = v8::Undefined(reinterpret_cast<v8::Isolate*>(isolate));
}
obj->set_data(*Utils::OpenHandle(*data));
obj->set_is_special_data_property(is_special_data_property);
obj->set_replace_on_access(replace_on_access);
i::Handle<i::Name> accessor_name = Utils::OpenHandle(*name);
if (!accessor_name->IsUniqueName()) {
accessor_name = isolate->factory()->InternalizeString(
i::Handle<i::String>::cast(accessor_name));
}
obj->set_name(*accessor_name);
if (settings & ALL_CAN_READ) obj->set_all_can_read(true);
if (settings & ALL_CAN_WRITE) obj->set_all_can_write(true);
obj->set_initial_property_attributes(i::NONE);
if (!signature.IsEmpty()) {
obj->set_expected_receiver_type(*Utils::OpenHandle(*signature));
}
return obj;
}
} // namespace
Local<ObjectTemplate> FunctionTemplate::InstanceTemplate() {
i::Handle<i::FunctionTemplateInfo> handle = Utils::OpenHandle(this, true);
if (!Utils::ApiCheck(!handle.is_null(),
"v8::FunctionTemplate::InstanceTemplate()",
"Reading from empty handle")) {
return Local<ObjectTemplate>();
}
i::Isolate* isolate = handle->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
if (handle->instance_template()->IsUndefined(isolate)) {
Local<ObjectTemplate> templ =
ObjectTemplate::New(isolate, ToApiHandle<FunctionTemplate>(handle));
handle->set_instance_template(*Utils::OpenHandle(*templ));
}
i::Handle<i::ObjectTemplateInfo> result(
i::ObjectTemplateInfo::cast(handle->instance_template()));
return Utils::ToLocal(result);
}
void FunctionTemplate::SetLength(int length) {
auto info = Utils::OpenHandle(this);
EnsureNotInstantiated(info, "v8::FunctionTemplate::SetLength");
auto isolate = info->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
info->set_length(length);
}
void FunctionTemplate::SetClassName(Local<String> name) {
auto info = Utils::OpenHandle(this);
EnsureNotInstantiated(info, "v8::FunctionTemplate::SetClassName");
auto isolate = info->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
info->set_class_name(*Utils::OpenHandle(*name));
}
void FunctionTemplate::SetAcceptAnyReceiver(bool value) {
auto info = Utils::OpenHandle(this);
EnsureNotInstantiated(info, "v8::FunctionTemplate::SetAcceptAnyReceiver");
auto isolate = info->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
info->set_accept_any_receiver(value);
}
void FunctionTemplate::SetHiddenPrototype(bool value) {
auto info = Utils::OpenHandle(this);
EnsureNotInstantiated(info, "v8::FunctionTemplate::SetHiddenPrototype");
auto isolate = info->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
info->set_hidden_prototype(value);
}
void FunctionTemplate::ReadOnlyPrototype() {
auto info = Utils::OpenHandle(this);
EnsureNotInstantiated(info, "v8::FunctionTemplate::ReadOnlyPrototype");
auto isolate = info->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
info->set_read_only_prototype(true);
}
void FunctionTemplate::RemovePrototype() {
auto info = Utils::OpenHandle(this);
EnsureNotInstantiated(info, "v8::FunctionTemplate::RemovePrototype");
auto isolate = info->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
info->set_remove_prototype(true);
}
// --- O b j e c t T e m p l a t e ---
Local<ObjectTemplate> ObjectTemplate::New(
Isolate* isolate, v8::Local<FunctionTemplate> constructor) {
return New(reinterpret_cast<i::Isolate*>(isolate), constructor);
}
static Local<ObjectTemplate> ObjectTemplateNew(
i::Isolate* isolate, v8::Local<FunctionTemplate> constructor,
bool do_not_cache) {
LOG_API(isolate, ObjectTemplate, New);
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
i::Handle<i::Struct> struct_obj =
isolate->factory()->NewStruct(i::OBJECT_TEMPLATE_INFO_TYPE, i::TENURED);
i::Handle<i::ObjectTemplateInfo> obj =
i::Handle<i::ObjectTemplateInfo>::cast(struct_obj);
InitializeTemplate(obj, Consts::OBJECT_TEMPLATE);
int next_serial_number = 0;
if (!do_not_cache) {
next_serial_number = isolate->heap()->GetNextTemplateSerialNumber();
}
obj->set_serial_number(i::Smi::FromInt(next_serial_number));
if (!constructor.IsEmpty())
obj->set_constructor(*Utils::OpenHandle(*constructor));
obj->set_data(i::Smi::kZero);
return Utils::ToLocal(obj);
}
Local<ObjectTemplate> ObjectTemplate::New(
i::Isolate* isolate, v8::Local<FunctionTemplate> constructor) {
return ObjectTemplateNew(isolate, constructor, false);
}
MaybeLocal<ObjectTemplate> ObjectTemplate::FromSnapshot(Isolate* isolate,
size_t index) {
i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
i::FixedArray* serialized_objects = i_isolate->heap()->serialized_objects();
int int_index = static_cast<int>(index);
if (int_index < serialized_objects->length()) {
i::Object* info = serialized_objects->get(int_index);
if (info->IsObjectTemplateInfo()) {
return Utils::ToLocal(
i::Handle<i::ObjectTemplateInfo>(i::ObjectTemplateInfo::cast(info)));
}
}
return Local<ObjectTemplate>();
}
// Ensure that the object template has a constructor. If no
// constructor is available we create one.
static i::Handle<i::FunctionTemplateInfo> EnsureConstructor(
i::Isolate* isolate,
ObjectTemplate* object_template) {
i::Object* obj = Utils::OpenHandle(object_template)->constructor();
if (!obj->IsUndefined(isolate)) {
i::FunctionTemplateInfo* info = i::FunctionTemplateInfo::cast(obj);
return i::Handle<i::FunctionTemplateInfo>(info, isolate);
}
Local<FunctionTemplate> templ =
FunctionTemplate::New(reinterpret_cast<Isolate*>(isolate));
i::Handle<i::FunctionTemplateInfo> constructor = Utils::OpenHandle(*templ);
constructor->set_instance_template(*Utils::OpenHandle(object_template));
Utils::OpenHandle(object_template)->set_constructor(*constructor);
return constructor;
}
template <typename Getter, typename Setter, typename Data, typename Template>
static void TemplateSetAccessor(Template* template_obj, v8::Local<Name> name,
Getter getter, Setter setter, Data data,
AccessControl settings,
PropertyAttribute attribute,
v8::Local<AccessorSignature> signature,
bool is_special_data_property,
bool replace_on_access) {
auto info = Utils::OpenHandle(template_obj);
auto isolate = info->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
i::HandleScope scope(isolate);
i::Handle<i::AccessorInfo> accessor_info =
MakeAccessorInfo(isolate, name, getter, setter, data, settings, signature,
is_special_data_property, replace_on_access);
accessor_info->set_initial_property_attributes(
static_cast<i::PropertyAttributes>(attribute));
i::ApiNatives::AddNativeDataProperty(isolate, info, accessor_info);
}
void Template::SetNativeDataProperty(v8::Local<String> name,
AccessorGetterCallback getter,
AccessorSetterCallback setter,
v8::Local<Value> data,
PropertyAttribute attribute,
v8::Local<AccessorSignature> signature,
AccessControl settings) {
TemplateSetAccessor(this, name, getter, setter, data, settings, attribute,
signature, true, false);
}
void Template::SetNativeDataProperty(v8::Local<Name> name,
AccessorNameGetterCallback getter,
AccessorNameSetterCallback setter,
v8::Local<Value> data,
PropertyAttribute attribute,
v8::Local<AccessorSignature> signature,
AccessControl settings) {
TemplateSetAccessor(this, name, getter, setter, data, settings, attribute,
signature, true, false);
}
void Template::SetLazyDataProperty(v8::Local<Name> name,
AccessorNameGetterCallback getter,
v8::Local<Value> data,
PropertyAttribute attribute) {
TemplateSetAccessor(
this, name, getter, static_cast<AccessorNameSetterCallback>(nullptr),
data, DEFAULT, attribute, Local<AccessorSignature>(), true, true);
}
void Template::SetIntrinsicDataProperty(Local<Name> name, Intrinsic intrinsic,
PropertyAttribute attribute) {
auto templ = Utils::OpenHandle(this);
i::Isolate* isolate = templ->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
i::HandleScope scope(isolate);
i::ApiNatives::AddDataProperty(isolate, templ, Utils::OpenHandle(*name),
intrinsic,
static_cast<i::PropertyAttributes>(attribute));
}
void ObjectTemplate::SetAccessor(v8::Local<String> name,
AccessorGetterCallback getter,
AccessorSetterCallback setter,
v8::Local<Value> data, AccessControl settings,
PropertyAttribute attribute,
v8::Local<AccessorSignature> signature) {
TemplateSetAccessor(this, name, getter, setter, data, settings, attribute,
signature, i::FLAG_disable_old_api_accessors, false);
}
void ObjectTemplate::SetAccessor(v8::Local<Name> name,
AccessorNameGetterCallback getter,
AccessorNameSetterCallback setter,
v8::Local<Value> data, AccessControl settings,
PropertyAttribute attribute,
v8::Local<AccessorSignature> signature) {
TemplateSetAccessor(this, name, getter, setter, data, settings, attribute,
signature, i::FLAG_disable_old_api_accessors, false);
}
template <typename Getter, typename Setter, typename Query, typename Descriptor,
typename Deleter, typename Enumerator, typename Definer>
static i::Handle<i::InterceptorInfo> CreateInterceptorInfo(
i::Isolate* isolate, Getter getter, Setter setter, Query query,
Descriptor descriptor, Deleter remover, Enumerator enumerator,
Definer definer, Local<Value> data, PropertyHandlerFlags flags) {
// Either intercept attributes or descriptor.
DCHECK(query == nullptr || descriptor == nullptr);
// Only use descriptor callback with definer callback.
DCHECK(query == nullptr || definer == nullptr);
auto obj = i::Handle<i::InterceptorInfo>::cast(
isolate->factory()->NewStruct(i::INTERCEPTOR_INFO_TYPE, i::TENURED));
obj->set_flags(0);
if (getter != 0) SET_FIELD_WRAPPED(obj, set_getter, getter);
if (setter != 0) SET_FIELD_WRAPPED(obj, set_setter, setter);
if (query != 0) SET_FIELD_WRAPPED(obj, set_query, query);
if (descriptor != 0) SET_FIELD_WRAPPED(obj, set_descriptor, descriptor);
if (remover != 0) SET_FIELD_WRAPPED(obj, set_deleter, remover);
if (enumerator != 0) SET_FIELD_WRAPPED(obj, set_enumerator, enumerator);
if (definer != 0) SET_FIELD_WRAPPED(obj, set_definer, definer);
obj->set_can_intercept_symbols(
!(static_cast<int>(flags) &
static_cast<int>(PropertyHandlerFlags::kOnlyInterceptStrings)));
obj->set_all_can_read(static_cast<int>(flags) &
static_cast<int>(PropertyHandlerFlags::kAllCanRead));
obj->set_non_masking(static_cast<int>(flags) &
static_cast<int>(PropertyHandlerFlags::kNonMasking));
if (data.IsEmpty()) {
data = v8::Undefined(reinterpret_cast<v8::Isolate*>(isolate));
}
obj->set_data(*Utils::OpenHandle(*data));
return obj;
}
template <typename Getter, typename Setter, typename Query, typename Descriptor,
typename Deleter, typename Enumerator, typename Definer>
static i::Handle<i::InterceptorInfo> CreateNamedInterceptorInfo(
i::Isolate* isolate, Getter getter, Setter setter, Query query,
Descriptor descriptor, Deleter remover, Enumerator enumerator,
Definer definer, Local<Value> data, PropertyHandlerFlags flags) {
auto interceptor =
CreateInterceptorInfo(isolate, getter, setter, query, descriptor, remover,
enumerator, definer, data, flags);
interceptor->set_is_named(true);
return interceptor;
}
template <typename Getter, typename Setter, typename Query, typename Descriptor,
typename Deleter, typename Enumerator, typename Definer>
static i::Handle<i::InterceptorInfo> CreateIndexedInterceptorInfo(
i::Isolate* isolate, Getter getter, Setter setter, Query query,
Descriptor descriptor, Deleter remover, Enumerator enumerator,
Definer definer, Local<Value> data, PropertyHandlerFlags flags) {
auto interceptor =
CreateInterceptorInfo(isolate, getter, setter, query, descriptor, remover,
enumerator, definer, data, flags);
interceptor->set_is_named(false);
return interceptor;
}
template <typename Getter, typename Setter, typename Query, typename Descriptor,
typename Deleter, typename Enumerator, typename Definer>
static void ObjectTemplateSetNamedPropertyHandler(
ObjectTemplate* templ, Getter getter, Setter setter, Query query,
Descriptor descriptor, Deleter remover, Enumerator enumerator,
Definer definer, Local<Value> data, PropertyHandlerFlags flags) {
i::Isolate* isolate = Utils::OpenHandle(templ)->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
i::HandleScope scope(isolate);
auto cons = EnsureConstructor(isolate, templ);
EnsureNotInstantiated(cons, "ObjectTemplateSetNamedPropertyHandler");
auto obj =
CreateNamedInterceptorInfo(isolate, getter, setter, query, descriptor,
remover, enumerator, definer, data, flags);
cons->set_named_property_handler(*obj);
}
// TODO(cbruni) deprecate.
void ObjectTemplate::SetNamedPropertyHandler(
NamedPropertyGetterCallback getter, NamedPropertySetterCallback setter,
NamedPropertyQueryCallback query, NamedPropertyDeleterCallback remover,
NamedPropertyEnumeratorCallback enumerator, Local<Value> data) {
ObjectTemplateSetNamedPropertyHandler(
this, getter, setter, query, nullptr, remover, enumerator, nullptr, data,
PropertyHandlerFlags::kOnlyInterceptStrings);
}
void ObjectTemplate::SetHandler(
const NamedPropertyHandlerConfiguration& config) {
ObjectTemplateSetNamedPropertyHandler(
this, config.getter, config.setter, config.query, config.descriptor,
config.deleter, config.enumerator, config.definer, config.data,
config.flags);
}
void ObjectTemplate::MarkAsUndetectable() {
i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
i::HandleScope scope(isolate);
auto cons = EnsureConstructor(isolate, this);
EnsureNotInstantiated(cons, "v8::ObjectTemplate::MarkAsUndetectable");
cons->set_undetectable(true);
}
void ObjectTemplate::SetAccessCheckCallback(AccessCheckCallback callback,
Local<Value> data) {
i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
i::HandleScope scope(isolate);
auto cons = EnsureConstructor(isolate, this);
EnsureNotInstantiated(cons, "v8::ObjectTemplate::SetAccessCheckCallback");
i::Handle<i::Struct> struct_info =
isolate->factory()->NewStruct(i::ACCESS_CHECK_INFO_TYPE, i::TENURED);
i::Handle<i::AccessCheckInfo> info =
i::Handle<i::AccessCheckInfo>::cast(struct_info);
SET_FIELD_WRAPPED(info, set_callback, callback);
info->set_named_interceptor(nullptr);
info->set_indexed_interceptor(nullptr);
if (data.IsEmpty()) {
data = v8::Undefined(reinterpret_cast<v8::Isolate*>(isolate));
}
info->set_data(*Utils::OpenHandle(*data));
cons->set_access_check_info(*info);
cons->set_needs_access_check(true);
}
void ObjectTemplate::SetAccessCheckCallbackAndHandler(
AccessCheckCallback callback,
const NamedPropertyHandlerConfiguration& named_handler,
const IndexedPropertyHandlerConfiguration& indexed_handler,
Local<Value> data) {
i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
i::HandleScope scope(isolate);
auto cons = EnsureConstructor(isolate, this);
EnsureNotInstantiated(
cons, "v8::ObjectTemplate::SetAccessCheckCallbackWithHandler");
i::Handle<i::Struct> struct_info =
isolate->factory()->NewStruct(i::ACCESS_CHECK_INFO_TYPE, i::TENURED);
i::Handle<i::AccessCheckInfo> info =
i::Handle<i::AccessCheckInfo>::cast(struct_info);
SET_FIELD_WRAPPED(info, set_callback, callback);
auto named_interceptor = CreateNamedInterceptorInfo(
isolate, named_handler.getter, named_handler.setter, named_handler.query,
named_handler.descriptor, named_handler.deleter, named_handler.enumerator,
named_handler.definer, named_handler.data, named_handler.flags);
info->set_named_interceptor(*named_interceptor);
auto indexed_interceptor = CreateIndexedInterceptorInfo(
isolate, indexed_handler.getter, indexed_handler.setter,
indexed_handler.query, indexed_handler.descriptor,
indexed_handler.deleter, indexed_handler.enumerator,
indexed_handler.definer, indexed_handler.data, indexed_handler.flags);
info->set_indexed_interceptor(*indexed_interceptor);
if (data.IsEmpty()) {
data = v8::Undefined(reinterpret_cast<v8::Isolate*>(isolate));
}
info->set_data(*Utils::OpenHandle(*data));
cons->set_access_check_info(*info);
cons->set_needs_access_check(true);
}
void ObjectTemplate::SetHandler(
const IndexedPropertyHandlerConfiguration& config) {
i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
i::HandleScope scope(isolate);
auto cons = EnsureConstructor(isolate, this);
EnsureNotInstantiated(cons, "v8::ObjectTemplate::SetHandler");
auto obj = CreateIndexedInterceptorInfo(
isolate, config.getter, config.setter, config.query, config.descriptor,
config.deleter, config.enumerator, config.definer, config.data,
config.flags);
cons->set_indexed_property_handler(*obj);
}
void ObjectTemplate::SetCallAsFunctionHandler(FunctionCallback callback,
Local<Value> data) {
i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
i::HandleScope scope(isolate);
auto cons = EnsureConstructor(isolate, this);
EnsureNotInstantiated(cons, "v8::ObjectTemplate::SetCallAsFunctionHandler");
i::Handle<i::Struct> struct_obj =
isolate->factory()->NewStruct(i::TUPLE3_TYPE, i::TENURED);
i::Handle<i::CallHandlerInfo> obj =
i::Handle<i::CallHandlerInfo>::cast(struct_obj);
SET_FIELD_WRAPPED(obj, set_callback, callback);
SET_FIELD_WRAPPED(obj, set_js_callback, obj->redirected_callback());
if (data.IsEmpty()) {
data = v8::Undefined(reinterpret_cast<v8::Isolate*>(isolate));
}
obj->set_data(*Utils::OpenHandle(*data));
cons->set_instance_call_handler(*obj);
}
int ObjectTemplate::InternalFieldCount() {
return Utils::OpenHandle(this)->embedder_field_count();
}
void ObjectTemplate::SetInternalFieldCount(int value) {
i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
if (!Utils::ApiCheck(i::Smi::IsValid(value),
"v8::ObjectTemplate::SetInternalFieldCount()",
"Invalid embedder field count")) {
return;
}
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
if (value > 0) {
// The embedder field count is set by the constructor function's
// construct code, so we ensure that there is a constructor
// function to do the setting.
EnsureConstructor(isolate, this);
}
Utils::OpenHandle(this)->set_embedder_field_count(value);
}
bool ObjectTemplate::IsImmutableProto() {
return Utils::OpenHandle(this)->immutable_proto();
}
void ObjectTemplate::SetImmutableProto() {
i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
Utils::OpenHandle(this)->set_immutable_proto(true);
}
// --- S c r i p t s ---
// Internally, UnboundScript is a SharedFunctionInfo, and Script is a
// JSFunction.
ScriptCompiler::CachedData::CachedData(const uint8_t* data_, int length_,
BufferPolicy buffer_policy_)
: data(data_),
length(length_),
rejected(false),
buffer_policy(buffer_policy_) {}
ScriptCompiler::CachedData::~CachedData() {
if (buffer_policy == BufferOwned) {
delete[] data;
}
}
bool ScriptCompiler::ExternalSourceStream::SetBookmark() { return false; }
void ScriptCompiler::ExternalSourceStream::ResetToBookmark() { UNREACHABLE(); }
ScriptCompiler::StreamedSource::StreamedSource(ExternalSourceStream* stream,
Encoding encoding)
: impl_(new i::StreamedSource(stream, encoding)) {}
ScriptCompiler::StreamedSource::~StreamedSource() { delete impl_; }
const ScriptCompiler::CachedData*
ScriptCompiler::StreamedSource::GetCachedData() const {
return impl_->cached_data.get();
}
Local<Script> UnboundScript::BindToCurrentContext() {
i::Handle<i::HeapObject> obj =
i::Handle<i::HeapObject>::cast(Utils::OpenHandle(this));
i::Isolate* isolate = obj->GetIsolate();
i::Handle<i::SharedFunctionInfo> function_info(
i::SharedFunctionInfo::cast(*obj), isolate);
i::Handle<i::JSFunction> function =
isolate->factory()->NewFunctionFromSharedFunctionInfo(
function_info, isolate->native_context());
return ToApiHandle<Script>(function);
}
int UnboundScript::GetId() {
i::Handle<i::HeapObject> obj =
i::Handle<i::HeapObject>::cast(Utils::OpenHandle(this));
i::Isolate* isolate = obj->GetIsolate();
LOG_API(isolate, UnboundScript, GetId);
i::HandleScope scope(isolate);
i::Handle<i::SharedFunctionInfo> function_info(
i::SharedFunctionInfo::cast(*obj));
i::Handle<i::Script> script(i::Script::cast(function_info->script()));
return script->id();
}
int UnboundScript::GetLineNumber(int code_pos) {
i::Handle<i::SharedFunctionInfo> obj =
i::Handle<i::SharedFunctionInfo>::cast(Utils::OpenHandle(this));
i::Isolate* isolate = obj->GetIsolate();
LOG_API(isolate, UnboundScript, GetLineNumber);
if (obj->script()->IsScript()) {
i::Handle<i::Script> script(i::Script::cast(obj->script()));
return i::Script::GetLineNumber(script, code_pos);
} else {
return -1;
}
}
Local<Value> UnboundScript::GetScriptName() {
i::Handle<i::SharedFunctionInfo> obj =
i::Handle<i::SharedFunctionInfo>::cast(Utils::OpenHandle(this));
i::Isolate* isolate = obj->GetIsolate();
LOG_API(isolate, UnboundScript, GetName);
if (obj->script()->IsScript()) {
i::Object* name = i::Script::cast(obj->script())->name();
return Utils::ToLocal(i::Handle<i::Object>(name, isolate));
} else {
return Local<String>();
}
}
Local<Value> UnboundScript::GetSourceURL() {
i::Handle<i::SharedFunctionInfo> obj =
i::Handle<i::SharedFunctionInfo>::cast(Utils::OpenHandle(this));
i::Isolate* isolate = obj->GetIsolate();
LOG_API(isolate, UnboundScript, GetSourceURL);
if (obj->script()->IsScript()) {
i::Object* url = i::Script::cast(obj->script())->source_url();
return Utils::ToLocal(i::Handle<i::Object>(url, isolate));
} else {
return Local<String>();
}
}
Local<Value> UnboundScript::GetSourceMappingURL() {
i::Handle<i::SharedFunctionInfo> obj =
i::Handle<i::SharedFunctionInfo>::cast(Utils::OpenHandle(this));
i::Isolate* isolate = obj->GetIsolate();
LOG_API(isolate, UnboundScript, GetSourceMappingURL);
if (obj->script()->IsScript()) {
i::Object* url = i::Script::cast(obj->script())->source_mapping_url();
return Utils::ToLocal(i::Handle<i::Object>(url, isolate));
} else {
return Local<String>();
}
}
MaybeLocal<Value> Script::Run(Local<Context> context) {
auto isolate = reinterpret_cast<i::Isolate*>(context->GetIsolate());
TRACE_EVENT_CALL_STATS_SCOPED(isolate, "v8", "V8.Execute");
ENTER_V8(isolate, context, Script, Run, MaybeLocal<Value>(),
InternalEscapableScope);
i::HistogramTimerScope execute_timer(isolate->counters()->execute(), true);
i::AggregatingHistogramTimerScope timer(isolate->counters()->compile_lazy());
i::TimerEventScope<i::TimerEventExecute> timer_scope(isolate);
auto fun = i::Handle<i::JSFunction>::cast(Utils::OpenHandle(this));
i::Handle<i::Object> receiver = isolate->global_proxy();
Local<Value> result;
has_pending_exception = !ToLocal<Value>(
i::Execution::Call(isolate, fun, receiver, 0, nullptr), &result);
RETURN_ON_FAILED_EXECUTION(Value);
RETURN_ESCAPED(result);
}
Local<Value> Script::Run() {
auto self = Utils::OpenHandle(this, true);
// If execution is terminating, Compile(..)->Run() requires this
// check.
if (self.is_null()) return Local<Value>();
auto context = ContextFromHeapObject(self);
RETURN_TO_LOCAL_UNCHECKED(Run(context), Value);
}
Local<Value> ScriptOrModule::GetResourceName() {
i::Handle<i::Script> obj = Utils::OpenHandle(this);
i::Isolate* isolate = obj->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
i::Handle<i::Object> val(obj->name(), isolate);
return ToApiHandle<Value>(val);
}
Local<PrimitiveArray> ScriptOrModule::GetHostDefinedOptions() {
i::Handle<i::Script> obj = Utils::OpenHandle(this);
i::Isolate* isolate = obj->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
i::Handle<i::FixedArray> val(obj->host_defined_options(), isolate);
return ToApiHandle<PrimitiveArray>(val);
}
Local<UnboundScript> Script::GetUnboundScript() {
i::Handle<i::Object> obj = Utils::OpenHandle(this);
return ToApiHandle<UnboundScript>(
i::Handle<i::SharedFunctionInfo>(i::JSFunction::cast(*obj)->shared()));
}
// static
Local<PrimitiveArray> PrimitiveArray::New(Isolate* v8_isolate, int length) {
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
Utils::ApiCheck(length >= 0, "v8::PrimitiveArray::New",
"length must be equal or greater than zero");
i::Handle<i::FixedArray> array = isolate->factory()->NewFixedArray(length);
return ToApiHandle<PrimitiveArray>(array);
}
int PrimitiveArray::Length() const {
i::Handle<i::FixedArray> array = Utils::OpenHandle(this);
i::Isolate* isolate = array->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
return array->length();
}
void PrimitiveArray::Set(int index, Local<Primitive> item) {
i::Handle<i::FixedArray> array = Utils::OpenHandle(this);
i::Isolate* isolate = array->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
Utils::ApiCheck(index >= 0 && index < array->length(),
"v8::PrimitiveArray::Set",
"index must be greater than or equal to 0 and less than the "
"array length");
i::Handle<i::Object> i_item = Utils::OpenHandle(*item);
array->set(index, *i_item);
}
Local<Primitive> PrimitiveArray::Get(int index) {
i::Handle<i::FixedArray> array = Utils::OpenHandle(this);
i::Isolate* isolate = array->GetIsolate();
ENTER_V8_NO_SCRIPT_NO_EXCEPTION(isolate);
Utils::ApiCheck(index >= 0 && index < array->length(),
"v8::PrimitiveArray::Get",
"index must be greater than or equal to 0 and less than the "
"array length");
i::Handle<i::Object> i_item(array->get(index), isolate);
return ToApiHandle<Primitive>(i_item);
}
Module::Status Module::GetStatus() const {
i::Handle<i::Module> self = Utils::OpenHandle(this);
switch (self->status()) {
case i::Module::kUninstantiated:
case i::Module::kPreInstantiating:
return kUninstantiated;
case i::Module::kInstantiating:
return kInstantiating;
case i::Module::kInstantiated:
return kInstantiated;
case i::Module::kEvaluating:
return kEvaluating;
case i::Module::kEvaluated:
return kEvaluated;
case i::Module::kErrored:
return kErrored;
}
UNREACHABLE();
}
Local<Value> Module::GetException() const {
Utils::ApiCheck(GetStatus() == kErrored, "v8::Module::GetException",
"Module status must be kErrored");
i::Handle<i::Module> self = Utils::OpenHandle(this);
i::Isolate* isolate = self->GetIsolate();
return ToApiHandle<Value>(i::handle(self->GetException(), isolate));
}
int Module::GetModuleRequestsLength() const {
i::Handle<i::Module> self = Utils::OpenHandle(this);
return self->info()->module_requests()->length();
}
Local<String> Module::GetModuleRequest(int i) const {
CHECK_GE(i, 0);
i::Handle<i::Module> self = Utils::OpenHandle(this);
i::Isolate* isolate = self->GetIsolate();
i::Handle<i::FixedArray> module_requests(self->info()->module_requests(),
isolate);
CHECK_LT(i, module_requests->length());
return ToApiHandle<String>(i::handle(module_requests->get(i), isolate));
}
Location Module::GetModuleRequestLocation(int i) const {
CHECK_GE(i, 0);
i::Isolate* isolate = Utils::OpenHandle(this)->GetIsolate();
i::HandleScope scope(isolate);
i::Handle<i::Module> self = Utils::OpenHandle(this);
i::Handle<i::FixedArray> module_request_positions(
self->info()->module_request_positions(), isolate);
CHECK_LT(i, module_request_positions->length());
int position = i::Smi::ToInt(module_request_positions->get(i));
i::Handle<i::Script> script(self->script(), isolate);
i::Script::PositionInfo info;
i::Script::GetPositionInfo(script, position, &info, i::Script::WITH_OFFSET);
return v8::Location(info.line, info.column);
}
Local<Value> Module::GetModuleNamespace() {
Utils::ApiCheck(
GetStatus() >= kInstantiated, "v8::Module::GetModuleNamespace",
"v8::Module::GetModuleNamespace must be used on an instantiated module");
i::Handle<i::Module> self = Utils::OpenHandle(this);
i::Handle<i::JSModuleNamespace> module_namespace =
i::Module::GetModuleNamespace(self);
return ToApiHandle<Value>(module_namespace);
}
int Module::GetIdentityHash() const { return Utils::OpenHandle(this)->hash(); }
Maybe<bool> Module::InstantiateModule(Local<Context> context,
Module::ResolveCallback callback) {
auto isolate = reinterpret_cast<i::Isolate*>(context->GetIsolate());
ENTER_V8(isolate, context, Module, InstantiateModule, Nothing<bool>(),
i::HandleScope);
has_pending_exception =
!i::Module::Instantiate(Utils::OpenHandle(this), context, callback);
RETURN_ON_FAILED_EXECUTION_PRIMITIVE(bool);
return Just(true);
}
MaybeLocal<Value> Module::Evaluate(Local<Context> context) {
auto isolate = reinterpret_cast<i::Isolate*>(context->GetIsolate());
TRACE_EVENT_CALL_STATS_SCOPED(isolate, "v8", "V8.Execute");
ENTER_V8(isolate, context, Module, Evaluate, MaybeLocal<Value>(),
InternalEscapableScope);
i::HistogramTimerScope execute_timer(isolate->counters()->execute(), true);
i::AggregatingHistogramTimerScope timer(isolate->counters()->compile_lazy());
i::TimerEventScope<i::TimerEventExecute> timer_scope(isolate);
i::Handle<i::Module> self = Utils::OpenHandle(this);
// It's an API error to call Evaluate before Instantiate.
CHECK_GE(self->status(), i::Module::kInstantiated);
Local<Value> result;
has_pending_exception = !ToLocal(i::Module::Evaluate(self), &result);
RETURN_ON_FAILED_EXECUTION(Value);
RETURN_ESCAPED(result);
}
MaybeLocal<UnboundScript> ScriptCompiler::CompileUnboundInternal(
Isolate* v8_isolate, Source* source, CompileOptions options,
NoCacheReason no_cache_reason) {
auto isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
TRACE_EVENT_CALL_STATS_SCOPED(isolate, "v8", "V8.ScriptCompiler");
ENTER_V8_NO_SCRIPT(isolate, v8_isolate->GetCurrentContext(), ScriptCompiler,
CompileUnbound, MaybeLocal<UnboundScript>(),
InternalEscapableScope);
bool produce_cache = options == kProduceParserCache ||
options == kProduceCodeCache ||
options == kProduceFullCodeCache;
// Don't try to produce any kind of cache when the debugger is loaded.
if (isolate->debug()->is_loaded() && produce_cache) {
options = kNoCompileOptions;
}
i::ScriptData* script_data = nullptr;
if (options == kConsumeParserCache || options == kConsumeCodeCache) {
DCHECK(source->cached_data);
// ScriptData takes care of pointer-aligning the data.
script_data = new i::ScriptData(source->cached_data->data,
source->cached_data->length);
}
i::Handle<i::String> str = Utils::OpenHandle(*(source->source_string));
i::Handle<i::SharedFunctionInfo> result;
TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("v8.compile"), "V8.CompileScript");
i::MaybeHandle<i::Object> name_obj;
i::MaybeHandle<i::Object> source_map_url;
i::MaybeHandle<i::FixedArray> host_defined_options =
isolate->factory()->empty_fixed_array();
int line_offset = 0;
int column_offset = 0;
if (!source->resource_name.IsEmpty()) {
name_obj = Utils::OpenHandle(*(source->resource_name));
}
if (!source->host_defined_options.IsEmpty()) {
host_defined_options = Utils::OpenHandle(*(source->host_defined_options));
}
if (!source->resource_line_offset.IsEmpty()) {
line_offset = static_cast<int>(source->resource_line_offset->Value());
}
if (!source->resource_column_offset.IsEmpty()) {
column_offset = static_cast<int>(source->resource_column_offset->Value());
}
if (!source->source_map_url.IsEmpty()) {
source_map_url = Utils::OpenHandle(*(source->source_map_url));
}
i::MaybeHandle<i::SharedFunctionInfo> maybe_function_info =
i::Compiler::GetSharedFunctionInfoForScript(
str, name_obj, line_offset, column_offset, source->resource_options,
source_map_url, isolate->native_context(), nullptr, &script_data,
options, no_cache_reason, i::NOT_NATIVES_CODE, host_defined_options);
has_pending_exception = !maybe_function_info.ToHandle(&result);
if (has_pending_exception && script_data != nullptr) {
// This case won't happen during normal operation; we have compiled
// successfully and produced cached data, and but the second compilation
// of the same source code fails.
delete script_data;
script_data = nullptr;
}
RETURN_ON_FAILED_EXECUTION(UnboundScript);
if (produce_cache && script_data != nullptr) {
// script_data now contains the data that was generated. source will
// take the ownership.
source->cached_data = new CachedData(
script_data->data(), script_data->length(), CachedData::BufferOwned);
script_data->ReleaseDataOwnership();
} else if (options == kConsumeParserCache || options == kConsumeCodeCache) {
source->cached_data->rejected = script_data->rejected();
}
delete script_data;
RETURN_ESCAPED(ToApiHandle<UnboundScript>(result));
}
MaybeLocal<UnboundScript> ScriptCompiler::CompileUnboundScript(
Isolate* v8_isolate, Source* source, CompileOptions options,
NoCacheReason no_cache_reason) {
Utils::ApiCheck(
!source->GetResourceOptions().IsModule(),
"v8::ScriptCompiler::CompileUnboundScript",
"v8::ScriptCompiler::CompileModule must be used to compile modules");
return CompileUnboundInternal(v8_isolate, source, options, no_cache_reason);
}
MaybeLocal<Script> ScriptCompiler::Compile(Local<Context> context,
Source* source,
CompileOptions options,
NoCacheReason no_cache_reason) {
Utils::ApiCheck(
!source->GetResourceOptions().IsModule(), "v8::ScriptCompiler::Compile",
"v8::ScriptCompiler::CompileModule must be used to compile modules");
auto isolate = context->GetIsolate();
auto maybe =
CompileUnboundInternal(isolate, source, options, no_cache_reason);
Local<UnboundScript> result;
if (!maybe.ToLocal(&result)) return MaybeLocal<Script>();
v8::Context::Scope scope(context);
return result->BindToCurrentContext();
}
MaybeLocal<Module> ScriptCompiler::CompileModule(Isolate* isolate,
Source* source) {
i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
Utils::ApiCheck(source->GetResourceOptions().IsModule(),
"v8::ScriptCompiler::CompileModule",
"Invalid ScriptOrigin: is_module must be true");
auto maybe = CompileUnboundInternal(isolate, source, kNoCompileOptions,
kNoCacheBecauseModule);
Local<UnboundScript> unbound;
if (!maybe.ToLocal(&unbound)) return MaybeLocal<Module>();
i::Handle<i::SharedFunctionInfo> shared = Utils::OpenHandle(*unbound);
return ToApiHandle<Module>(i_isolate->factory()->NewModule(shared));
}
class IsIdentifierHelper {
public:
IsIdentifierHelper() : is_identifier_(false), first_char_(true) {}
bool Check(i::String* string) {
i::ConsString* cons_string = i::String::VisitFlat(this, string, 0);
if (cons_string == nullptr) return is_identifier_;
// We don't support cons strings here.
return false;
}
void VisitOneByteString(const uint8_t* chars, int length) {
for (int i = 0; i < length; ++i) {
if (first_char_) {
first_char_ = false;
is_identifier_ = unicode_cache_.IsIdentifierStart(chars[0]);
} else {
is_identifier_ &= unicode_cache_.IsIdentifierPart(chars[i]);
}
}
}
void VisitTwoByteString(const uint16_t* chars, int length) {
for (int i = 0; i < length; ++i) {
if (first_char_) {
first_char_ = false;
is_identifier_ = unicode_cache_.IsIdentifierStart(chars[0]);
} else {
is_identifier_ &= unicode_cache_.IsIdentifierPart(chars[i]);
}
}
}
private:
bool is_identifier_;
bool first_char_;
i::UnicodeCache unicode_cache_;
DISALLOW_COPY_AND_ASSIGN(IsIdentifierHelper);
};
MaybeLocal<Function> ScriptCompiler::CompileFunctionInContext(
Local<Context> v8_context, Source* source, size_t arguments_count,
Local<String> arguments[], size_t context_extension_count,
Local<Object> context_extensions[]) {
PREPARE_FOR_EXECUTION(v8_context, ScriptCompiler, CompileFunctionInContext,
Function);
TRACE_EVENT_CALL_STATS_SCOPED(isolate, "v8", "V8.ScriptCompiler");
i::Handle<i::Context> context = Utils::OpenHandle(*v8_context);
i::Handle<i::SharedFunctionInfo> outer_info(context->closure()->shared(),
isolate);
i::Handle<i::JSFunction> fun;
i::Handle<i::FixedArray> arguments_list =
isolate->factory()->NewFixedArray(static_cast<int>(arguments_count));
for (int i = 0; i < static_cast<int>(arguments_count); i++) {
IsIdentifierHelper helper;
i::Handle<i::String> argument = Utils::OpenHandle(*arguments[i]);
if (!helper.Check(*argument)) return Local<Function>();
arguments_list->set(i, *argument);
}
for (size_t i = 0; i < context_extension_count; ++i) {
i::Handle<i::JSReceiver> extension =
Utils::OpenHandle(*context_extensions[i]);
if (!extension->IsJSObject()) return Local<Function>();
i::Handle<i::JSFunction> closure(context->closure(), isolate);
context = isolate->factory()->NewWithContext(
closure, context,
i::ScopeInfo::CreateForWithScope(
isolate, context->IsNativeContext()
? i::Handle<i::ScopeInfo>::null()
: i::Handle<i::ScopeInfo>(context->scope_info())),
extension);
}
i::Handle<i::Object> name_obj;
int line_offset = 0;
int column_offset = 0;
if (!source->resource_name.IsEmpty()) {
name_obj = Utils::OpenHandle(*(source->resource_name));
}
if (!source->resource_line_offset.IsEmpty()) {
line_offset = static_cast<int>(source->resource_line_offset->Value());
}
if (!source->resource_column_offset.IsEmpty()) {
column_offset = static_cast<int>(source->resource_column_offset->Value());
}
i::Handle<i::JSFunction> result;
has_pending_exception =
!i::Compiler::GetWrappedFunction(
Utils::OpenHandle(*source->source_string), arguments_list, context,
line_offset, column_offset, name_obj, source->resource_options)
.ToHandle(&result);
RETURN_ON_FAILED_EXECUTION(Function);
RETURN_ESCAPED(Utils::CallableToLocal(result));
}
Local<Function> ScriptCompiler::CompileFunctionInContext(
Isolate* v8_isolate, Source* source, Local<Context> v8_context,
size_t arguments_count, Local<String> arguments[],
size_t context_extension_count, Local<Object> context_extensions[]) {
RETURN_TO_LOCAL_UNCHECKED(
CompileFunctionInContext(v8_context, source, arguments_count, arguments,
context_extension_count, context_extensions),
Function);
}
ScriptCompiler::ScriptStreamingTask* ScriptCompiler::StartStreamingScript(
Isolate* v8_isolate, StreamedSource* source, CompileOptions options) {
if (!i::FLAG_script_streaming) {
return nullptr;
}
i::Isolate* isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
return new i::BackgroundParsingTask(source->impl(), options,
i::FLAG_stack_size, isolate);
}
MaybeLocal<Script> ScriptCompiler::Compile(Local<Context> context,