blob: 41b43fb072ac162d91fa6fb5f679dc35aa579028 [file] [log] [blame]
/*
* Copyright (C) 2012-2013, 2016 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "ProfilerDatabase.h"
#include "CodeBlock.h"
#include "JSCInlines.h"
#include "JSONObject.h"
#include "ObjectConstructor.h"
#include <wtf/FilePrintStream.h>
namespace JSC { namespace Profiler {
static std::atomic<int> databaseCounter;
static Lock registrationLock;
static std::atomic<int> didRegisterAtExit;
static Database* firstDatabase;
Database::Database(VM& vm)
: m_databaseID(++databaseCounter)
, m_vm(vm)
, m_shouldSaveAtExit(false)
, m_nextRegisteredDatabase(nullptr)
{
}
Database::~Database()
{
if (m_shouldSaveAtExit) {
removeDatabaseFromAtExit();
performAtExitSave();
}
}
Bytecodes* Database::ensureBytecodesFor(CodeBlock* codeBlock)
{
Locker locker { m_lock };
return ensureBytecodesFor(locker, codeBlock);
}
Bytecodes* Database::ensureBytecodesFor(const AbstractLocker&, CodeBlock* codeBlock)
{
codeBlock = codeBlock->baselineAlternative();
HashMap<CodeBlock*, Bytecodes*>::iterator iter = m_bytecodesMap.find(codeBlock);
if (iter != m_bytecodesMap.end())
return iter->value;
m_bytecodes.append(Bytecodes(m_bytecodes.size(), codeBlock));
Bytecodes* result = &m_bytecodes.last();
m_bytecodesMap.add(codeBlock, result);
return result;
}
void Database::notifyDestruction(CodeBlock* codeBlock)
{
Locker locker { m_lock };
m_bytecodesMap.remove(codeBlock);
m_compilationMap.remove(codeBlock);
}
void Database::addCompilation(CodeBlock* codeBlock, Ref<Compilation>&& compilation)
{
Locker locker { m_lock };
m_compilations.append(compilation.copyRef());
m_compilationMap.set(codeBlock, WTFMove(compilation));
}
JSValue Database::toJS(JSGlobalObject* globalObject) const
{
VM& vm = globalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
JSObject* result = constructEmptyObject(globalObject);
JSArray* bytecodes = constructEmptyArray(globalObject, nullptr);
RETURN_IF_EXCEPTION(scope, { });
for (unsigned i = 0; i < m_bytecodes.size(); ++i) {
auto value = m_bytecodes[i].toJS(globalObject);
RETURN_IF_EXCEPTION(scope, { });
bytecodes->putDirectIndex(globalObject, i, value);
RETURN_IF_EXCEPTION(scope, { });
}
result->putDirect(vm, vm.propertyNames->bytecodes, bytecodes);
JSArray* compilations = constructEmptyArray(globalObject, nullptr);
RETURN_IF_EXCEPTION(scope, { });
for (unsigned i = 0; i < m_compilations.size(); ++i) {
auto value = m_compilations[i]->toJS(globalObject);
RETURN_IF_EXCEPTION(scope, { });
compilations->putDirectIndex(globalObject, i, value);
RETURN_IF_EXCEPTION(scope, { });
}
result->putDirect(vm, vm.propertyNames->compilations, compilations);
JSArray* events = constructEmptyArray(globalObject, nullptr);
RETURN_IF_EXCEPTION(scope, { });
for (unsigned i = 0; i < m_events.size(); ++i) {
auto value = m_events[i].toJS(globalObject);
RETURN_IF_EXCEPTION(scope, { });
events->putDirectIndex(globalObject, i, value);
RETURN_IF_EXCEPTION(scope, { });
}
result->putDirect(vm, vm.propertyNames->events, events);
return result;
}
String Database::toJSON() const
{
auto scope = DECLARE_THROW_SCOPE(m_vm);
JSGlobalObject* globalObject = JSGlobalObject::create(
m_vm, JSGlobalObject::createStructure(m_vm, jsNull()));
auto value = toJS(globalObject);
RETURN_IF_EXCEPTION(scope, String());
RELEASE_AND_RETURN(scope, JSONStringify(globalObject, value, 0));
}
bool Database::save(const char* filename) const
{
auto scope = DECLARE_CATCH_SCOPE(m_vm);
auto out = FilePrintStream::open(filename, "w");
if (!out)
return false;
String data = toJSON();
if (UNLIKELY(scope.exception())) {
scope.clearException();
return false;
}
out->print(data);
return true;
}
void Database::registerToSaveAtExit(const char* filename)
{
m_atExitSaveFilename = filename;
if (m_shouldSaveAtExit)
return;
addDatabaseToAtExit();
m_shouldSaveAtExit = true;
}
void Database::logEvent(CodeBlock* codeBlock, const char* summary, const CString& detail)
{
Locker locker { m_lock };
Bytecodes* bytecodes = ensureBytecodesFor(locker, codeBlock);
Compilation* compilation = m_compilationMap.get(codeBlock);
m_events.append(Event(WallTime::now(), bytecodes, compilation, summary, detail));
}
void Database::addDatabaseToAtExit()
{
if (++didRegisterAtExit == 1)
atexit(atExitCallback);
Locker locker { registrationLock };
m_nextRegisteredDatabase = firstDatabase;
firstDatabase = this;
}
void Database::removeDatabaseFromAtExit()
{
Locker locker { registrationLock };
for (Database** current = &firstDatabase; *current; current = &(*current)->m_nextRegisteredDatabase) {
if (*current != this)
continue;
*current = m_nextRegisteredDatabase;
m_nextRegisteredDatabase = nullptr;
m_shouldSaveAtExit = false;
break;
}
}
void Database::performAtExitSave() const
{
JSLockHolder lock(m_vm);
save(m_atExitSaveFilename.data());
}
Database* Database::removeFirstAtExitDatabase()
{
Locker locker { registrationLock };
Database* result = firstDatabase;
if (result) {
firstDatabase = result->m_nextRegisteredDatabase;
result->m_nextRegisteredDatabase = nullptr;
result->m_shouldSaveAtExit = false;
}
return result;
}
void Database::atExitCallback()
{
while (Database* database = removeFirstAtExitDatabase())
database->performAtExitSave();
}
} } // namespace JSC::Profiler