// NOTE: this will not find a new entry until it has been written to disk!
// Consumer should take ownership of the resulting buffer.
nsresult
StartupCache::GetBuffer(const char* id, char** outbuf, uint32_t* length)
{
NS_ASSERTION(NS_IsMainThread(), "Startup cache only available on main thread");
WaitOnWriteThread();
if (!mStartupWriteInitiated) {
CacheEntry* entry;
nsDependentCString idStr(id);
mTable.Get(idStr, &entry);
if (entry) {
*outbuf = new char[entry->size];
memcpy(*outbuf, entry->data, entry->size);
*length = entry->size;
return NS_OK;
}
}
nsresult rv = GetBufferFromZipArchive(mArchive, true, id, outbuf, length);
if (NS_SUCCEEDED(rv))
return rv;
nsRefPtr<nsZipArchive> omnijar = mozilla::Omnijar::GetReader(mozilla::Omnijar::APP);
// no need to checksum omnijarred entries
rv = GetBufferFromZipArchive(omnijar, false, id, outbuf, length);
if (NS_SUCCEEDED(rv))
return rv;
omnijar = mozilla::Omnijar::GetReader(mozilla::Omnijar::GRE);
// no need to checksum omnijarred entries
return GetBufferFromZipArchive(omnijar, false, id, outbuf, length);
}
// Makes a copy of the buffer, client retains ownership of inbuf.
nsresult
StartupCache::PutBuffer(const char* id, const char* inbuf, uint32_t len)
{
NS_ASSERTION(NS_IsMainThread(), "Startup cache only available on main thread");
WaitOnWriteThread();
if (StartupCache::gShutdownInitiated) {
return NS_ERROR_NOT_AVAILABLE;
}
nsAutoArrayPtr<char> data(new char[len]);
memcpy(data, inbuf, len);
nsDependentCString idStr(id);
// Cache it for now, we'll write all together later.
CacheEntry* entry;
#ifdef DEBUG
mTable.Get(idStr, &entry);
NS_ASSERTION(entry == nullptr, "Existing entry in StartupCache.");
if (mArchive) {
nsZipItem* zipItem = mArchive->GetItem(id);
NS_ASSERTION(zipItem == nullptr, "Existing entry in disk StartupCache.");
}
#endif
entry = new CacheEntry(data.forget(), len);
mTable.Put(idStr, entry);
return ResetStartupWriteTimer();
}
// Makes a copy of the buffer, client retains ownership of inbuf.
nsresult
StartupCache::PutBuffer(const char* id, const char* inbuf, uint32_t len)
{
NS_ASSERTION(NS_IsMainThread(), "Startup cache only available on main thread");
WaitOnWriteThread();
if (StartupCache::gShutdownInitiated) {
return NS_ERROR_NOT_AVAILABLE;
}
auto data = MakeUnique<char[]>(len);
memcpy(data.get(), inbuf, len);
nsCString idStr(id);
// Cache it for now, we'll write all together later.
CacheEntry* entry;
if (mTable.Get(idStr)) {
NS_ASSERTION(false, "Existing entry in StartupCache.");
// Double-caching is undesirable but not an error.
return NS_OK;
}
#ifdef DEBUG
if (mArchive) {
nsZipItem* zipItem = mArchive->GetItem(id);
NS_ASSERTION(zipItem == nullptr, "Existing entry in disk StartupCache.");
}
#endif
entry = new CacheEntry(Move(data), len);
mTable.Put(idStr, entry);
mPendingWrites.AppendElement(idStr);
return ResetStartupWriteTimer();
}
// NOTE: this will not find a new entry until it has been written to disk!
// Consumer should take ownership of the resulting buffer.
nsresult
StartupCache::GetBuffer(const char* id, UniquePtr<char[]>* outbuf, uint32_t* length)
{
PROFILER_LABEL_FUNC(js::ProfileEntry::Category::OTHER);
NS_ASSERTION(NS_IsMainThread(), "Startup cache only available on main thread");
WaitOnWriteThread();
if (!mStartupWriteInitiated) {
CacheEntry* entry;
nsDependentCString idStr(id);
mTable.Get(idStr, &entry);
if (entry) {
*outbuf = MakeUnique<char[]>(entry->size);
memcpy(outbuf->get(), entry->data.get(), entry->size);
*length = entry->size;
return NS_OK;
}
}
nsresult rv = GetBufferFromZipArchive(mArchive, true, id, outbuf, length);
if (NS_SUCCEEDED(rv))
return rv;
RefPtr<nsZipArchive> omnijar = mozilla::Omnijar::GetReader(mozilla::Omnijar::APP);
// no need to checksum omnijarred entries
rv = GetBufferFromZipArchive(omnijar, false, id, outbuf, length);
if (NS_SUCCEEDED(rv))
return rv;
omnijar = mozilla::Omnijar::GetReader(mozilla::Omnijar::GRE);
// no need to checksum omnijarred entries
return GetBufferFromZipArchive(omnijar, false, id, outbuf, length);
}
StartupCache::~StartupCache()
{
if (mTimer) {
mTimer->Cancel();
}
// Generally, the in-memory table should be empty here,
// but an early shutdown means either mTimer didn't run
// or the write thread is still running.
WaitOnWriteThread();
// If we shutdown quickly timer wont have fired. Instead of writing
// it on the main thread and block the shutdown we simply wont update
// the startup cache. Always do this if the file doesn't exist since
// we use it part of the packge step.
if (!mArchive) {
WriteToDisk();
}
gStartupCache = nullptr;
(void)::NS_UnregisterMemoryReporter(mMappingMemoryReporter);
(void)::NS_UnregisterMemoryReporter(mDataMemoryReporter);
mMappingMemoryReporter = nullptr;
mDataMemoryReporter = nullptr;
}
void
StartupCache::InvalidateCache()
{
WaitOnWriteThread();
mTable.Clear();
mArchive = NULL;
mFile->Remove(false);
LoadArchive(gPostFlushAgeAction);
}
void
StartupCache::InvalidateCache()
{
WaitOnWriteThread();
mTable.Clear();
mArchive = NULL;
nsresult rv = mFile->Remove(false);
if (NS_FAILED(rv) && rv != NS_ERROR_FILE_TARGET_DOES_NOT_EXIST &&
rv != NS_ERROR_FILE_NOT_FOUND) {
gIgnoreDiskCache = true;
return;
}
gIgnoreDiskCache = false;
LoadArchive(gPostFlushAgeAction);
}
void
StartupCache::InvalidateCache()
{
WaitOnWriteThread();
mTable.Clear();
mArchive = nullptr;
nsresult rv = mFile->Remove(false);
if (NS_FAILED(rv) && rv != NS_ERROR_FILE_TARGET_DOES_NOT_EXIST &&
rv != NS_ERROR_FILE_NOT_FOUND) {
gIgnoreDiskCache = true;
mozilla::Telemetry::Accumulate(Telemetry::STARTUP_CACHE_INVALID, true);
return;
}
gIgnoreDiskCache = false;
LoadArchive(gPostFlushAgeAction);
}
StartupCache::~StartupCache()
{
if (mTimer) {
mTimer->Cancel();
}
// Generally, the in-memory table should be empty here,
// but an early shutdown means either mTimer didn't run
// or the write thread is still running.
WaitOnWriteThread();
WriteToDisk();
gStartupCache = nullptr;
(void)::NS_UnregisterMemoryReporter(mMappingMemoryReporter);
(void)::NS_UnregisterMemoryReporter(mDataMemoryReporter);
mMappingMemoryReporter = nullptr;
mDataMemoryReporter = nullptr;
}
bool
StartupCache::StartupWriteComplete()
{
WaitOnWriteThread();
return mStartupWriteInitiated && mTable.Count() == 0;
}