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#include "env.h"
#include "node.h"
#include "node_context_data.h"
#include "node_errors.h"
#include "node_internals.h"
#include "node_native_module.h"
#include "node_platform.h"
#include "node_process.h"
#include "node_v8_platform-inl.h"
#include "uv.h"
namespace node {
using v8::Context;
using v8::Function;
using v8::HandleScope;
using v8::Isolate;
using v8::Local;
using v8::MaybeLocal;
using v8::Message;
using v8::MicrotasksPolicy;
using v8::ObjectTemplate;
using v8::String;
using v8::Value;
static bool AllowWasmCodeGenerationCallback(Local<Context> context,
Local<String>) {
Local<Value> wasm_code_gen =
context->GetEmbedderData(ContextEmbedderIndex::kAllowWasmCodeGeneration);
return wasm_code_gen->IsUndefined() || wasm_code_gen->IsTrue();
}
static bool ShouldAbortOnUncaughtException(Isolate* isolate) {
HandleScope scope(isolate);
Environment* env = Environment::GetCurrent(isolate);
return env != nullptr && env->should_abort_on_uncaught_toggle()[0] &&
!env->inside_should_not_abort_on_uncaught_scope();
}
static void OnMessage(Local<Message> message, Local<Value> error) {
Isolate* isolate = message->GetIsolate();
switch (message->ErrorLevel()) {
case Isolate::MessageErrorLevel::kMessageWarning: {
Environment* env = Environment::GetCurrent(isolate);
if (!env) {
break;
}
Utf8Value filename(isolate, message->GetScriptOrigin().ResourceName());
// (filename):(line) (message)
std::stringstream warning;
warning << *filename;
warning << ":";
warning << message->GetLineNumber(env->context()).FromMaybe(-1);
warning << " ";
v8::String::Utf8Value msg(isolate, message->Get());
warning << *msg;
USE(ProcessEmitWarningGeneric(env, warning.str().c_str(), "V8"));
break;
}
case Isolate::MessageErrorLevel::kMessageError:
FatalException(isolate, error, message);
break;
}
}
void* ArrayBufferAllocator::Allocate(size_t size) {
if (zero_fill_field_ || per_process::cli_options->zero_fill_all_buffers)
return UncheckedCalloc(size);
else
return UncheckedMalloc(size);
}
ArrayBufferAllocator* CreateArrayBufferAllocator() {
return new ArrayBufferAllocator();
}
void FreeArrayBufferAllocator(ArrayBufferAllocator* allocator) {
delete allocator;
}
Isolate* NewIsolate(ArrayBufferAllocator* allocator, uv_loop_t* event_loop) {
Isolate::CreateParams params;
params.array_buffer_allocator = allocator;
double total_memory = uv_get_total_memory();
if (total_memory > 0) {
// V8 defaults to 700MB or 1.4GB on 32 and 64 bit platforms respectively.
// This default is based on browser use-cases. Tell V8 to configure the
// heap based on the actual physical memory.
params.constraints.ConfigureDefaults(total_memory, 0);
}
#ifdef NODE_ENABLE_VTUNE_PROFILING
params.code_event_handler = vTune::GetVtuneCodeEventHandler();
#endif
Isolate* isolate = Isolate::Allocate();
if (isolate == nullptr) return nullptr;
// Register the isolate on the platform before the isolate gets initialized,
// so that the isolate can access the platform during initialization.
per_process::v8_platform.Platform()->RegisterIsolate(isolate, event_loop);
Isolate::Initialize(isolate, params);
isolate->AddMessageListenerWithErrorLevel(
OnMessage,
Isolate::MessageErrorLevel::kMessageError |
Isolate::MessageErrorLevel::kMessageWarning);
isolate->SetAbortOnUncaughtExceptionCallback(ShouldAbortOnUncaughtException);
isolate->SetMicrotasksPolicy(MicrotasksPolicy::kExplicit);
isolate->SetFatalErrorHandler(OnFatalError);
isolate->SetAllowWasmCodeGenerationCallback(AllowWasmCodeGenerationCallback);
v8::CpuProfiler::UseDetailedSourcePositionsForProfiling(isolate);
return isolate;
}
IsolateData* CreateIsolateData(Isolate* isolate,
uv_loop_t* loop,
MultiIsolatePlatform* platform,
ArrayBufferAllocator* allocator) {
return new IsolateData(
isolate,
loop,
platform,
allocator != nullptr ? allocator->zero_fill_field() : nullptr);
}
void FreeIsolateData(IsolateData* isolate_data) {
delete isolate_data;
}
Environment* CreateEnvironment(IsolateData* isolate_data,
Local<Context> context,
int argc,
const char* const* argv,
int exec_argc,
const char* const* exec_argv) {
Isolate* isolate = context->GetIsolate();
HandleScope handle_scope(isolate);
Context::Scope context_scope(context);
// TODO(addaleax): This is a much better place for parsing per-Environment
// options than the global parse call.
std::vector<std::string> args(argv, argv + argc);
std::vector<std::string> exec_args(exec_argv, exec_argv + exec_argc);
// TODO(addaleax): Provide more sensible flags, in an embedder-accessible way.
Environment* env = new Environment(
isolate_data,
context,
static_cast<Environment::Flags>(Environment::kIsMainThread |
Environment::kOwnsProcessState |
Environment::kOwnsInspector));
env->Start(per_process::v8_is_profiling);
env->ProcessCliArgs(args, exec_args);
return env;
}
void FreeEnvironment(Environment* env) {
env->RunCleanup();
delete env;
}
Environment* GetCurrentEnvironment(Local<Context> context) {
return Environment::GetCurrent(context);
}
MultiIsolatePlatform* GetMainThreadMultiIsolatePlatform() {
return per_process::v8_platform.Platform();
}
MultiIsolatePlatform* CreatePlatform(
int thread_pool_size,
node::tracing::TracingController* tracing_controller) {
return new NodePlatform(thread_pool_size, tracing_controller);
}
MultiIsolatePlatform* InitializeV8Platform(int thread_pool_size) {
per_process::v8_platform.Initialize(thread_pool_size);
return per_process::v8_platform.Platform();
}
void FreePlatform(MultiIsolatePlatform* platform) {
delete platform;
}
Local<Context> NewContext(Isolate* isolate,
Local<ObjectTemplate> object_template) {
auto context = Context::New(isolate, nullptr, object_template);
if (context.IsEmpty()) return context;
HandleScope handle_scope(isolate);
context->SetEmbedderData(ContextEmbedderIndex::kAllowWasmCodeGeneration,
True(isolate));
{
// Run lib/internal/bootstrap/context.js
Context::Scope context_scope(context);
std::vector<Local<String>> parameters = {
FIXED_ONE_BYTE_STRING(isolate, "global")};
Local<Value> arguments[] = {context->Global()};
MaybeLocal<Function> maybe_fn =
per_process::native_module_loader.LookupAndCompile(
context, "internal/bootstrap/context", ¶meters, nullptr);
if (maybe_fn.IsEmpty()) {
return Local<Context>();
}
Local<Function> fn = maybe_fn.ToLocalChecked();
MaybeLocal<Value> result =
fn->Call(context, Undefined(isolate), arraysize(arguments), arguments);
// Execution failed during context creation.
// TODO(joyeecheung): deprecate this signature and return a MaybeLocal.
if (result.IsEmpty()) {
return Local<Context>();
}
}
return context;
}
uv_loop_t* GetCurrentEventLoop(Isolate* isolate) {
HandleScope handle_scope(isolate);
Local<Context> context = isolate->GetCurrentContext();
if (context.IsEmpty()) return nullptr;
Environment* env = Environment::GetCurrent(context);
if (env == nullptr) return nullptr;
return env->event_loop();
}
} // namespace node
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