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#include "node_internals.h"
#include "async-wrap.h"
#include "v8-profiler.h"
#if defined(_MSC_VER)
#define getpid GetCurrentProcessId
#else
#include <unistd.h>
#endif
#include <stdio.h>
#include <algorithm>
namespace node {
using v8::Context;
using v8::FunctionTemplate;
using v8::HandleScope;
using v8::Local;
using v8::Message;
using v8::StackFrame;
using v8::StackTrace;
void Environment::Start(int argc,
const char* const* argv,
int exec_argc,
const char* const* exec_argv,
bool start_profiler_idle_notifier) {
HandleScope handle_scope(isolate());
Context::Scope context_scope(context());
uv_check_init(event_loop(), immediate_check_handle());
uv_unref(reinterpret_cast<uv_handle_t*>(immediate_check_handle()));
uv_idle_init(event_loop(), immediate_idle_handle());
// Inform V8's CPU profiler when we're idle. The profiler is sampling-based
// but not all samples are created equal; mark the wall clock time spent in
// epoll_wait() and friends so profiling tools can filter it out. The samples
// still end up in v8.log but with state=IDLE rather than state=EXTERNAL.
// TODO(bnoordhuis) Depends on a libuv implementation detail that we should
// probably fortify in the API contract, namely that the last started prepare
// or check watcher runs first. It's not 100% foolproof; if an add-on starts
// a prepare or check watcher after us, any samples attributed to its callback
// will be recorded with state=IDLE.
uv_prepare_init(event_loop(), &idle_prepare_handle_);
uv_check_init(event_loop(), &idle_check_handle_);
uv_unref(reinterpret_cast<uv_handle_t*>(&idle_prepare_handle_));
uv_unref(reinterpret_cast<uv_handle_t*>(&idle_check_handle_));
uv_timer_init(event_loop(), destroy_async_ids_timer_handle());
auto close_and_finish = [](Environment* env, uv_handle_t* handle, void* arg) {
handle->data = env;
uv_close(handle, [](uv_handle_t* handle) {
static_cast<Environment*>(handle->data)->FinishHandleCleanup(handle);
});
};
RegisterHandleCleanup(
reinterpret_cast<uv_handle_t*>(immediate_check_handle()),
close_and_finish,
nullptr);
RegisterHandleCleanup(
reinterpret_cast<uv_handle_t*>(immediate_idle_handle()),
close_and_finish,
nullptr);
RegisterHandleCleanup(
reinterpret_cast<uv_handle_t*>(&idle_prepare_handle_),
close_and_finish,
nullptr);
RegisterHandleCleanup(
reinterpret_cast<uv_handle_t*>(&idle_check_handle_),
close_and_finish,
nullptr);
RegisterHandleCleanup(
reinterpret_cast<uv_handle_t*>(&destroy_async_ids_timer_handle_),
close_and_finish,
nullptr);
if (start_profiler_idle_notifier) {
StartProfilerIdleNotifier();
}
auto process_template = FunctionTemplate::New(isolate());
process_template->SetClassName(FIXED_ONE_BYTE_STRING(isolate(), "process"));
auto process_object =
process_template->GetFunction()->NewInstance(context()).ToLocalChecked();
set_process_object(process_object);
SetupProcessObject(this, argc, argv, exec_argc, exec_argv);
LoadAsyncWrapperInfo(this);
}
void Environment::CleanupHandles() {
while (HandleCleanup* hc = handle_cleanup_queue_.PopFront()) {
handle_cleanup_waiting_++;
hc->cb_(this, hc->handle_, hc->arg_);
delete hc;
}
while (handle_cleanup_waiting_ != 0)
uv_run(event_loop(), UV_RUN_ONCE);
}
void Environment::StartProfilerIdleNotifier() {
uv_prepare_start(&idle_prepare_handle_, [](uv_prepare_t* handle) {
Environment* env = ContainerOf(&Environment::idle_prepare_handle_, handle);
env->isolate()->GetCpuProfiler()->SetIdle(true);
});
uv_check_start(&idle_check_handle_, [](uv_check_t* handle) {
Environment* env = ContainerOf(&Environment::idle_check_handle_, handle);
env->isolate()->GetCpuProfiler()->SetIdle(false);
});
}
void Environment::StopProfilerIdleNotifier() {
uv_prepare_stop(&idle_prepare_handle_);
uv_check_stop(&idle_check_handle_);
}
void Environment::PrintSyncTrace() const {
if (!trace_sync_io_)
return;
HandleScope handle_scope(isolate());
Local<v8::StackTrace> stack =
StackTrace::CurrentStackTrace(isolate(), 10, StackTrace::kDetailed);
fprintf(stderr, "(node:%d) WARNING: Detected use of sync API\n", getpid());
for (int i = 0; i < stack->GetFrameCount() - 1; i++) {
Local<StackFrame> stack_frame = stack->GetFrame(i);
node::Utf8Value fn_name_s(isolate(), stack_frame->GetFunctionName());
node::Utf8Value script_name(isolate(), stack_frame->GetScriptName());
const int line_number = stack_frame->GetLineNumber();
const int column = stack_frame->GetColumn();
if (stack_frame->IsEval()) {
if (stack_frame->GetScriptId() == Message::kNoScriptIdInfo) {
fprintf(stderr, " at [eval]:%i:%i\n", line_number, column);
} else {
fprintf(stderr,
" at [eval] (%s:%i:%i)\n",
*script_name,
line_number,
column);
}
break;
}
if (fn_name_s.length() == 0) {
fprintf(stderr, " at %s:%i:%i\n", *script_name, line_number, column);
} else {
fprintf(stderr,
" at %s (%s:%i:%i)\n",
*fn_name_s,
*script_name,
line_number,
column);
}
}
fflush(stderr);
}
void Environment::RunAtExitCallbacks() {
for (AtExitCallback at_exit : at_exit_functions_) {
at_exit.cb_(at_exit.arg_);
}
at_exit_functions_.clear();
}
void Environment::AtExit(void (*cb)(void* arg), void* arg) {
at_exit_functions_.push_back(AtExitCallback{cb, arg});
}
void Environment::AddPromiseHook(promise_hook_func fn, void* arg) {
auto it = std::find_if(
promise_hooks_.begin(), promise_hooks_.end(),
[&](const PromiseHookCallback& hook) {
return hook.cb_ == fn && hook.arg_ == arg;
});
if (it != promise_hooks_.end()) {
it->enable_count_++;
return;
}
promise_hooks_.push_back(PromiseHookCallback{fn, arg, 1});
if (promise_hooks_.size() == 1) {
isolate_->SetPromiseHook(EnvPromiseHook);
}
}
bool Environment::RemovePromiseHook(promise_hook_func fn, void* arg) {
auto it = std::find_if(
promise_hooks_.begin(), promise_hooks_.end(),
[&](const PromiseHookCallback& hook) {
return hook.cb_ == fn && hook.arg_ == arg;
});
if (it == promise_hooks_.end()) return false;
if (--it->enable_count_ > 0) return true;
promise_hooks_.erase(it);
if (promise_hooks_.empty()) {
isolate_->SetPromiseHook(nullptr);
}
return true;
}
bool Environment::EmitNapiWarning() {
bool current_value = emit_napi_warning_;
emit_napi_warning_ = false;
return current_value;
}
void Environment::EnvPromiseHook(v8::PromiseHookType type,
v8::Local<v8::Promise> promise,
v8::Local<v8::Value> parent) {
Environment* env = Environment::GetCurrent(promise->CreationContext());
for (const PromiseHookCallback& hook : env->promise_hooks_) {
hook.cb_(type, promise, parent, hook.arg_);
}
}
} // namespace node
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