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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
#include "node.h"
#include "env.h"
#include "env-inl.h"
#include "util.h"
#include "util-inl.h"
#include "v8.h"
namespace node {
using v8::Context;
using v8::Function;
using v8::FunctionCallbackInfo;
using v8::GCCallbackFlags;
using v8::GCType;
using v8::Handle;
using v8::HandleScope;
using v8::HeapStatistics;
using v8::Isolate;
using v8::Local;
using v8::Null;
using v8::Number;
using v8::Object;
using v8::Uint32;
using v8::Value;
using v8::kGCTypeAll;
using v8::kGCTypeMarkSweepCompact;
using v8::kGCTypeScavenge;
void Environment::IsolateData::BeforeGarbageCollection(Isolate* isolate,
GCType type,
GCCallbackFlags flags) {
Get(isolate)->BeforeGarbageCollection(type, flags);
}
void Environment::IsolateData::AfterGarbageCollection(Isolate* isolate,
GCType type,
GCCallbackFlags flags) {
Get(isolate)->AfterGarbageCollection(type, flags);
}
void Environment::IsolateData::BeforeGarbageCollection(GCType type,
GCCallbackFlags flags) {
gc_info_before_ = GCInfo(isolate(), type, flags, uv_hrtime());
}
void Environment::IsolateData::AfterGarbageCollection(GCType type,
GCCallbackFlags flags) {
gc_info_after_ = GCInfo(isolate(), type, flags, uv_hrtime());
// The copy upfront and the remove-then-insert is to avoid corrupting the
// list when the callback removes itself from it. QUEUE_FOREACH() is unsafe
// when the list is mutated while being walked.
ASSERT(QUEUE_EMPTY(&gc_tracker_queue_) == false);
QUEUE queue;
QUEUE* q = QUEUE_HEAD(&gc_tracker_queue_);
QUEUE_SPLIT(&gc_tracker_queue_, q, &queue);
while (QUEUE_EMPTY(&queue) == false) {
q = QUEUE_HEAD(&queue);
QUEUE_REMOVE(q);
QUEUE_INSERT_TAIL(&gc_tracker_queue_, q);
Environment* env = CONTAINER_OF(q, Environment, gc_tracker_queue_);
env->AfterGarbageCollectionCallback(&gc_info_before_, &gc_info_after_);
}
}
void Environment::IsolateData::StartGarbageCollectionTracking(
Environment* env) {
if (QUEUE_EMPTY(&gc_tracker_queue_)) {
isolate()->AddGCPrologueCallback(BeforeGarbageCollection, v8::kGCTypeAll);
isolate()->AddGCEpilogueCallback(AfterGarbageCollection, v8::kGCTypeAll);
}
ASSERT(QUEUE_EMPTY(&env->gc_tracker_queue_) == true);
QUEUE_INSERT_TAIL(&gc_tracker_queue_, &env->gc_tracker_queue_);
}
void Environment::IsolateData::StopGarbageCollectionTracking(Environment* env) {
ASSERT(QUEUE_EMPTY(&env->gc_tracker_queue_) == false);
QUEUE_REMOVE(&env->gc_tracker_queue_);
QUEUE_INIT(&env->gc_tracker_queue_);
if (QUEUE_EMPTY(&gc_tracker_queue_)) {
isolate()->RemoveGCPrologueCallback(BeforeGarbageCollection);
isolate()->RemoveGCEpilogueCallback(AfterGarbageCollection);
}
}
// Considering a memory constrained environment, creating more objects is less
// than ideal
void Environment::AfterGarbageCollectionCallback(const GCInfo* before,
const GCInfo* after) {
HandleScope handle_scope(isolate());
Context::Scope context_scope(context());
Local<Value> argv[] = { Object::New(), Object::New() };
const GCInfo* infov[] = { before, after };
for (unsigned i = 0; i < ARRAY_SIZE(argv); i += 1) {
Local<Object> obj = argv[i].As<Object>();
const GCInfo* info = infov[i];
switch (info->type()) {
case kGCTypeScavenge:
obj->Set(type_string(), scavenge_string());
break;
case kGCTypeMarkSweepCompact:
obj->Set(type_string(), mark_sweep_compact_string());
break;
default:
UNREACHABLE();
}
obj->Set(flags_string(), Uint32::NewFromUnsigned(info->flags(), isolate()));
obj->Set(timestamp_string(), Number::New(isolate(), info->timestamp()));
// TODO(trevnorris): Setting many object properties in C++ is a significant
// performance hit. Redo this to pass the results to JS and create/set the
// properties there.
#define V(name) \
do { \
obj->Set(name ## _string(), \
Uint32::NewFromUnsigned(info->stats()->name(), isolate())); \
} while (0)
V(total_heap_size);
V(total_heap_size_executable);
V(total_physical_size);
V(used_heap_size);
V(heap_size_limit);
#undef V
}
MakeCallback(this,
Null(isolate()),
gc_info_callback_function(),
ARRAY_SIZE(argv),
argv);
}
void Environment::StartGarbageCollectionTracking(Local<Function> callback) {
ASSERT(gc_info_callback_function().IsEmpty() == true);
set_gc_info_callback_function(callback);
isolate_data()->StartGarbageCollectionTracking(this);
}
void Environment::StopGarbageCollectionTracking() {
ASSERT(gc_info_callback_function().IsEmpty() == false);
isolate_data()->StopGarbageCollectionTracking(this);
set_gc_info_callback_function(Local<Function>());
}
void StartGarbageCollectionTracking(const FunctionCallbackInfo<Value>& args) {
CHECK(args[0]->IsFunction() == true);
HandleScope handle_scope(args.GetIsolate());
Environment* env = Environment::GetCurrent(args.GetIsolate());
env->StartGarbageCollectionTracking(args[0].As<Function>());
}
void GetHeapStatistics(const FunctionCallbackInfo<Value>& args) {
Isolate* isolate = args.GetIsolate();
HandleScope handle_scope(isolate);
Environment* env = Environment::GetCurrent(isolate);
HeapStatistics s;
isolate->GetHeapStatistics(&s);
Local<Object> info = Object::New();
// TODO(trevnorris): Setting many object properties in C++ is a significant
// performance hit. Redo this to pass the results to JS and create/set the
// properties there.
#define V(name) \
info->Set(env->name ## _string(), Uint32::NewFromUnsigned(s.name(), isolate))
V(total_heap_size);
V(total_heap_size_executable);
V(total_physical_size);
V(used_heap_size);
V(heap_size_limit);
#undef V
args.GetReturnValue().Set(info);
}
void StopGarbageCollectionTracking(const FunctionCallbackInfo<Value>& args) {
HandleScope handle_scope(args.GetIsolate());
Environment::GetCurrent(args.GetIsolate())->StopGarbageCollectionTracking();
}
void InitializeV8Bindings(Handle<Object> target,
Handle<Value> unused,
Handle<Context> context) {
NODE_SET_METHOD(target,
"startGarbageCollectionTracking",
StartGarbageCollectionTracking);
NODE_SET_METHOD(target,
"stopGarbageCollectionTracking",
StopGarbageCollectionTracking);
NODE_SET_METHOD(target, "getHeapStatistics", GetHeapStatistics);
}
} // namespace node
NODE_MODULE_CONTEXT_AWARE_BUILTIN(v8, node::InitializeV8Bindings)
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