WebKit/Source/JavaScriptCore/profiler/ProfilerDatabase.cpp at main · WebKit/WebKit · GitHub

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* 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 "ProfilerDumper.h"

#include <wtf/FilePrintStream.h>

#include <wtf/TZoneMallocInlines.h>

namespace JSC { namespace Profiler {

WTF_MAKE_TZONE_ALLOCATED_IMPL(Database);

static Lock registrationLock;

static Database* firstDatabase;

Database::Database(VM& vm)

: m_databaseID(DatabaseID::generate())

, 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();

UncheckedKeyHashMap<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, WTF::move(compilation));

}

Ref<JSON::Value> Database::toJSON() const

{

Dumper dumper(*this);

auto result = JSON::Object::create();

auto bytecodes = JSON::Array::create();

for (unsigned i = 0; i < m_bytecodes.size(); ++i)

bytecodes->pushValue(m_bytecodes[i].toJSON(dumper));

result->setValue(dumper.keys().m_bytecodes, WTF::move(bytecodes));

auto compilations = JSON::Array::create();

for (unsigned i = 0; i < m_compilations.size(); ++i)

compilations->pushValue(m_compilations[i]->toJSON(dumper));

result->setValue(dumper.keys().m_compilations, WTF::move(compilations));

auto events = JSON::Array::create();

for (unsigned i = 0; i < m_events.size(); ++i)

events->pushValue(m_events[i].toJSON(dumper));

result->setValue(dumper.keys().m_events, WTF::move(events));

return result;

}

bool Database::save(const char* filename) const

{

auto out = FilePrintStream::open(filename, "w");

if (!out)

return false;

out->print(toJSON().get());

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()

{

static std::once_flag onceKey;

std::call_once(onceKey, [] {

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

WebKit/Source/JavaScriptCore/profiler/ProfilerDatabase.cpp at main · WebKit/WebKit · GitHub

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