#include "config.h"
#include "RegisterFile.h"
#include "ConservativeRoots.h"
#include "Interpreter.h"
namespace JSC {
static size_t committedBytesCount = 0;
static Mutex& registerFileStatisticsMutex()
{
DEFINE_STATIC_LOCAL(Mutex, staticMutex, ());
return staticMutex;
}
RegisterFile::~RegisterFile()
{
void* base = m_reservation.base();
m_reservation.decommit(base, reinterpret_cast<intptr_t>(m_commitEnd) - reinterpret_cast<intptr_t>(base));
addToCommittedByteCount(-(reinterpret_cast<intptr_t>(m_commitEnd) - reinterpret_cast<intptr_t>(base)));
m_reservation.deallocate();
}
bool RegisterFile::growSlowCase(Register* newEnd)
{
if (newEnd <= m_commitEnd) {
m_end = newEnd;
return true;
}
long delta = roundUpAllocationSize(reinterpret_cast<char*>(newEnd) - reinterpret_cast<char*>(m_commitEnd), commitSize);
if (reinterpret_cast<char*>(m_commitEnd) + delta > static_cast<char*>(m_reservation.base()) + m_reservation.size())
return false;
m_reservation.commit(m_commitEnd, delta);
addToCommittedByteCount(delta);
m_commitEnd = reinterpret_cast_ptr<Register*>(reinterpret_cast<char*>(m_commitEnd) + delta);
m_end = newEnd;
return true;
}
void RegisterFile::gatherConservativeRoots(ConservativeRoots& conservativeRoots)
{
conservativeRoots.add(begin(), end());
}
void RegisterFile::gatherConservativeRoots(ConservativeRoots& conservativeRoots, DFGCodeBlocks& dfgCodeBlocks)
{
conservativeRoots.add(begin(), end(), dfgCodeBlocks);
}
void RegisterFile::releaseExcessCapacity()
{
ptrdiff_t delta = reinterpret_cast<uintptr_t>(m_commitEnd) - reinterpret_cast<uintptr_t>(m_reservation.base());
m_reservation.decommit(m_reservation.base(), delta);
addToCommittedByteCount(-delta);
m_commitEnd = static_cast<Register*>(m_reservation.base());
}
void RegisterFile::initializeThreading()
{
registerFileStatisticsMutex();
}
size_t RegisterFile::committedByteCount()
{
MutexLocker locker(registerFileStatisticsMutex());
return committedBytesCount;
}
void RegisterFile::addToCommittedByteCount(long byteCount)
{
MutexLocker locker(registerFileStatisticsMutex());
ASSERT(static_cast<long>(committedBytesCount) + byteCount > -1);
committedBytesCount += byteCount;
}
}