LegacyProfiler.cpp [plain text]
#include "config.h"
#include "LegacyProfiler.h"
#include "CallFrame.h"
#include "CodeBlock.h"
#include "CommonIdentifiers.h"
#include "InternalFunction.h"
#include "JSFunction.h"
#include "JSGlobalObject.h"
#include "Nodes.h"
#include "JSCInlines.h"
#include "Profile.h"
#include "ProfileGenerator.h"
#include "ProfileNode.h"
namespace JSC {
static const char* GlobalCodeExecution = "(program)";
static const char* AnonymousFunction = "(anonymous function)";
static unsigned ProfilesUID = 0;
static CallIdentifier createCallIdentifierFromFunctionImp(ExecState*, JSObject*, const String& defaultSourceURL, unsigned defaultLineNumber, unsigned defaultColumnNumber);
LegacyProfiler* LegacyProfiler::s_sharedLegacyProfiler = 0;
LegacyProfiler* LegacyProfiler::profiler()
{
if (!s_sharedLegacyProfiler)
s_sharedLegacyProfiler = new LegacyProfiler();
return s_sharedLegacyProfiler;
}
void LegacyProfiler::startProfiling(ExecState* exec, const String& title)
{
if (!exec)
return;
JSGlobalObject* origin = exec->lexicalGlobalObject();
for (size_t i = 0; i < m_currentProfiles.size(); ++i) {
ProfileGenerator* profileGenerator = m_currentProfiles[i].get();
if (profileGenerator->origin() == origin && profileGenerator->title() == title)
return;
}
exec->vm().setEnabledProfiler(this);
RefPtr<ProfileGenerator> profileGenerator = ProfileGenerator::create(exec, title, ++ProfilesUID);
m_currentProfiles.append(profileGenerator);
}
PassRefPtr<Profile> LegacyProfiler::stopProfiling(ExecState* exec, const String& title)
{
if (!exec)
return 0;
JSGlobalObject* origin = exec->lexicalGlobalObject();
for (ptrdiff_t i = m_currentProfiles.size() - 1; i >= 0; --i) {
ProfileGenerator* profileGenerator = m_currentProfiles[i].get();
if (profileGenerator->origin() == origin && (title.isNull() || profileGenerator->title() == title)) {
profileGenerator->stopProfiling();
RefPtr<Profile> returnProfile = profileGenerator->profile();
m_currentProfiles.remove(i);
if (!m_currentProfiles.size())
exec->vm().setEnabledProfiler(nullptr);
return returnProfile;
}
}
return 0;
}
void LegacyProfiler::stopProfiling(JSGlobalObject* origin)
{
for (ptrdiff_t i = m_currentProfiles.size() - 1; i >= 0; --i) {
ProfileGenerator* profileGenerator = m_currentProfiles[i].get();
if (profileGenerator->origin() == origin) {
profileGenerator->stopProfiling();
m_currentProfiles.remove(i);
if (!m_currentProfiles.size())
origin->vm().setEnabledProfiler(nullptr);
}
}
}
static inline void dispatchFunctionToProfiles(ExecState* callerOrHandlerCallFrame, const Vector<RefPtr<ProfileGenerator>>& profiles, ProfileGenerator::ProfileFunction function, const CallIdentifier& callIdentifier, unsigned currentProfileTargetGroup)
{
for (size_t i = 0; i < profiles.size(); ++i) {
if (profiles[i]->profileGroup() == currentProfileTargetGroup || !profiles[i]->origin())
(profiles[i].get()->*function)(callerOrHandlerCallFrame, callIdentifier);
}
}
void LegacyProfiler::willExecute(ExecState* callerCallFrame, JSValue function)
{
ASSERT(!m_currentProfiles.isEmpty());
dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::willExecute, createCallIdentifier(callerCallFrame, function, StringImpl::empty(), 0, 0), callerCallFrame->lexicalGlobalObject()->profileGroup());
}
void LegacyProfiler::willExecute(ExecState* callerCallFrame, const String& sourceURL, unsigned startingLineNumber, unsigned startingColumnNumber)
{
ASSERT(!m_currentProfiles.isEmpty());
CallIdentifier callIdentifier = createCallIdentifier(callerCallFrame, JSValue(), sourceURL, startingLineNumber, startingColumnNumber);
dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::willExecute, callIdentifier, callerCallFrame->lexicalGlobalObject()->profileGroup());
}
void LegacyProfiler::didExecute(ExecState* callerCallFrame, JSValue function)
{
ASSERT(!m_currentProfiles.isEmpty());
dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::didExecute, createCallIdentifier(callerCallFrame, function, StringImpl::empty(), 0, 0), callerCallFrame->lexicalGlobalObject()->profileGroup());
}
void LegacyProfiler::didExecute(ExecState* callerCallFrame, const String& sourceURL, unsigned startingLineNumber, unsigned startingColumnNumber)
{
ASSERT(!m_currentProfiles.isEmpty());
dispatchFunctionToProfiles(callerCallFrame, m_currentProfiles, &ProfileGenerator::didExecute, createCallIdentifier(callerCallFrame, JSValue(), sourceURL, startingLineNumber, startingColumnNumber), callerCallFrame->lexicalGlobalObject()->profileGroup());
}
void LegacyProfiler::exceptionUnwind(ExecState* handlerCallFrame)
{
ASSERT(!m_currentProfiles.isEmpty());
dispatchFunctionToProfiles(handlerCallFrame, m_currentProfiles, &ProfileGenerator::exceptionUnwind, createCallIdentifier(handlerCallFrame, JSValue(), StringImpl::empty(), 0, 0), handlerCallFrame->lexicalGlobalObject()->profileGroup());
}
CallIdentifier LegacyProfiler::createCallIdentifier(ExecState* exec, JSValue functionValue, const String& defaultSourceURL, unsigned defaultLineNumber, unsigned defaultColumnNumber)
{
if (!functionValue)
return CallIdentifier(ASCIILiteral(GlobalCodeExecution), defaultSourceURL, defaultLineNumber, defaultColumnNumber);
if (!functionValue.isObject())
return CallIdentifier(ASCIILiteral("(unknown)"), defaultSourceURL, defaultLineNumber, defaultColumnNumber);
if (asObject(functionValue)->inherits(JSFunction::info()) || asObject(functionValue)->inherits(InternalFunction::info()))
return createCallIdentifierFromFunctionImp(exec, asObject(functionValue), defaultSourceURL, defaultLineNumber, defaultColumnNumber);
return CallIdentifier(asObject(functionValue)->methodTable()->className(asObject(functionValue)), defaultSourceURL, defaultLineNumber, defaultColumnNumber);
}
CallIdentifier createCallIdentifierFromFunctionImp(ExecState* exec, JSObject* function, const String& defaultSourceURL, unsigned defaultLineNumber, unsigned defaultColumnNumber)
{
const String& name = getCalculatedDisplayName(exec, function);
JSFunction* jsFunction = jsDynamicCast<JSFunction*>(function);
if (jsFunction && !jsFunction->isHostOrBuiltinFunction())
return CallIdentifier(name.isEmpty() ? ASCIILiteral(AnonymousFunction) : name, jsFunction->jsExecutable()->sourceURL(), jsFunction->jsExecutable()->lineNo(), jsFunction->jsExecutable()->startColumn());
return CallIdentifier(name.isEmpty() ? ASCIILiteral(AnonymousFunction) : name, defaultSourceURL, defaultLineNumber, defaultColumnNumber);
}
}