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#include "env.h"
#include "env-inl.h"
#include "async-wrap.h"
#include "v8.h"
#include "v8-profiler.h"
#if defined(_MSC_VER)
#define getpid GetCurrentProcessId
#else
#include <unistd.h>
#endif
#include <stdio.h>
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_idle_init(event_loop(), destroy_ids_idle_handle());
uv_unref(reinterpret_cast<uv_handle_t*>(destroy_ids_idle_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);
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::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);
}
} // namespace node
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