ScriptProfiler.cpp [plain text]
#include "config.h"
#if ENABLE(INSPECTOR)
#include "ScriptProfiler.h"
#include "DOMWrapperVisitor.h"
#include "RetainedDOMInfo.h"
#include "ScriptObject.h"
#include "V8Binding.h"
#include "V8DOMMap.h"
#include "V8Node.h"
#include "WrapperTypeInfo.h"
#include <v8-profiler.h>
namespace WebCore {
void ScriptProfiler::start(ScriptState* state, const String& title)
{
v8::HandleScope hs;
v8::CpuProfiler::StartProfiling(v8String(title));
}
void ScriptProfiler::startForPage(Page*, const String& title)
{
return start(0, title);
}
#if ENABLE(WORKERS)
void ScriptProfiler::startForWorkerContext(WorkerContext*, const String& title)
{
return start(0, title);
}
#endif
PassRefPtr<ScriptProfile> ScriptProfiler::stop(ScriptState* state, const String& title)
{
v8::HandleScope hs;
const v8::CpuProfile* profile = state ?
v8::CpuProfiler::StopProfiling(v8String(title), state->context()->GetSecurityToken()) :
v8::CpuProfiler::StopProfiling(v8String(title));
return profile ? ScriptProfile::create(profile) : 0;
}
PassRefPtr<ScriptProfile> ScriptProfiler::stopForPage(Page*, const String& title)
{
return stop(0, title);
}
#if ENABLE(WORKERS)
PassRefPtr<ScriptProfile> ScriptProfiler::stopForWorkerContext(WorkerContext*, const String& title)
{
return stop(0, title);
}
#endif
void ScriptProfiler::collectGarbage()
{
v8::V8::LowMemoryNotification();
}
ScriptObject ScriptProfiler::objectByHeapObjectId(unsigned id)
{
const v8::HeapGraphNode* node = 0;
for (int i = 0, l = v8::HeapProfiler::GetSnapshotsCount(); i < l; ++i) {
const v8::HeapSnapshot* snapshot = v8::HeapProfiler::GetSnapshot(i);
node = snapshot->GetNodeById(id);
if (node)
break;
}
if (!node)
return ScriptObject();
v8::HandleScope scope;
v8::Handle<v8::Value> value = node->GetHeapValue();
if (!value->IsObject())
return ScriptObject();
v8::Handle<v8::Object> object = value.As<v8::Object>();
if (object->InternalFieldCount() >= v8DefaultWrapperInternalFieldCount) {
v8::Handle<v8::Value> wrapper = object->GetInternalField(v8DOMWrapperObjectIndex);
if (!wrapper.IsEmpty() && wrapper->IsUndefined())
return ScriptObject();
}
ScriptState* scriptState = ScriptState::forContext(object->CreationContext());
return ScriptObject(scriptState, object);
}
namespace {
class ActivityControlAdapter : public v8::ActivityControl {
public:
ActivityControlAdapter(ScriptProfiler::HeapSnapshotProgress* progress)
: m_progress(progress), m_firstReport(true) { }
ControlOption ReportProgressValue(int done, int total)
{
ControlOption result = m_progress->isCanceled() ? kAbort : kContinue;
if (m_firstReport) {
m_firstReport = false;
m_progress->Start(total);
} else
m_progress->Worked(done);
if (done >= total)
m_progress->Done();
return result;
}
private:
ScriptProfiler::HeapSnapshotProgress* m_progress;
bool m_firstReport;
};
}
PassRefPtr<ScriptHeapSnapshot> ScriptProfiler::takeHeapSnapshot(const String& title, HeapSnapshotProgress* control)
{
v8::HandleScope hs;
ASSERT(control);
ActivityControlAdapter adapter(control);
const v8::HeapSnapshot* snapshot = v8::HeapProfiler::TakeSnapshot(v8String(title), v8::HeapSnapshot::kFull, &adapter);
return snapshot ? ScriptHeapSnapshot::create(snapshot) : 0;
}
static v8::RetainedObjectInfo* retainedDOMInfo(uint16_t classId, v8::Handle<v8::Value> wrapper)
{
ASSERT(classId == v8DOMSubtreeClassId);
if (!wrapper->IsObject())
return 0;
Node* node = V8Node::toNative(wrapper.As<v8::Object>());
return node ? new RetainedDOMInfo(node) : 0;
}
void ScriptProfiler::initialize()
{
v8::HeapProfiler::DefineWrapperClass(v8DOMSubtreeClassId, &retainedDOMInfo);
}
void ScriptProfiler::visitJSDOMWrappers(DOMWrapperVisitor* visitor)
{
class VisitorAdapter : public DOMWrapperMap<Node>::Visitor {
public:
VisitorAdapter(DOMWrapperVisitor* visitor) : m_visitor(visitor) { }
virtual void visitDOMWrapper(DOMDataStore*, Node* node, v8::Persistent<v8::Object>)
{
m_visitor->visitNode(node);
}
private:
DOMWrapperVisitor* m_visitor;
} adapter(visitor);
visitDOMNodes(&adapter);
}
void ScriptProfiler::visitExternalJSStrings(DOMWrapperVisitor* visitor)
{
V8BindingPerIsolateData::current()->visitJSExternalStrings(visitor);
}
}
#endif // ENABLE(INSPECTOR)