PhpFile *FileRepository::checkoutFile(StringData *rname,
const struct stat &s) {
FileInfo fileInfo;
PhpFile *ret = nullptr;
String name(rname);
bool isPlainFile = File::IsPlainFilePath(name);
if (isPlainFile) {
if (rname->data()[0] != '/') {
name = String(SourceRootInfo::GetCurrentSourceRoot()) + name;
}
// Get the common fast path out of the way with as little locking
// as possible: it's in the map and has not changed on disk
ParsedFilesMap::const_accessor acc;
if (s_files.find(acc, name.get()) && !acc->second->isChanged(s)) {
TRACE(1, "FR fast path hit %s\n", rname->data());
ret = acc->second->getPhpFile();
return ret;
}
} else {
// Do the read before we get the repo lock, since it will call into the
// stream library and will needs its own locks.
if (isAuthoritativeRepo()) {
throw FatalErrorException(
"including urls doesn't work in RepoAuthoritative mode"
);
}
Stream::Wrapper* w = Stream::getWrapperFromURI(name);
File* f = w->open(name, "r", 0, null_variant);
if (!f) return nullptr;
StringBuffer sb;
sb.read(f);
fileInfo.m_inputString = sb.detach();
computeMd5(name.get(), fileInfo);
}
TRACE(1, "FR fast path miss: %s\n", rname->data());
const StringData *n = makeStaticString(name.get());
PhpFile* toKill = nullptr;
SCOPE_EXIT {
// run this after acc is destroyed (and its lock released)
if (toKill) toKill->decRefAndDelete();
};
ParsedFilesMap::accessor acc;
bool isNew = s_files.insert(acc, n);
PhpFileWrapper* old = acc->second;
SCOPE_EXIT {
// run this just before acc is released
if (old && old != acc->second) {
if (old->getPhpFile() != acc->second->getPhpFile()) {
toKill = old->getPhpFile();
}
delete old;
}
if (!acc->second) s_files.erase(acc);
};
assert(isNew || old); // We don't leave null entries around.
bool isChanged = !isNew && old->isChanged(s);
if (isNew || isChanged) {
if (isPlainFile && !readFile(n, s, fileInfo)) {
TRACE(1, "File disappeared between stat and FR::readNewFile: %s\n",
rname->data());
return nullptr;
}
ret = fileInfo.m_phpFile;
if (isChanged && ret == old->getPhpFile()) {
// The file changed but had the same contents.
if (debug && md5Enabled()) {
ReadLock lock(s_md5Lock);
assert(s_md5Files.find(ret->getMd5())->second == ret);
}
return ret;
}
} else if (!isNew) {
// Somebody might have loaded the file between when we dropped
// our read lock and got the write lock
ret = old->getPhpFile();
return ret;
}
// If we get here the file was not in s_files or has changed on disk
if (!ret) {
// Try to read Unit from .hhbc repo.
ret = readHhbc(n->data(), fileInfo);
}
if (!ret) {
if (isAuthoritativeRepo()) {
raise_error("Tried to parse %s in repo authoritative mode", n->data());
}
ret = parseFile(n->data(), fileInfo);
if (!ret) return nullptr;
}
assert(ret != nullptr);
if (isNew) {
acc->second = new PhpFileWrapper(s, ret);
ret->incRef();
ret->setId(Transl::TargetCache::allocBit());
} else {
PhpFile *f = old->getPhpFile();
if (f != ret) {
ret->setId(f->getId());
ret->incRef();
}
acc->second = new PhpFileWrapper(s, ret);
}
if (md5Enabled()) {
WriteLock lock(s_md5Lock);
s_md5Files[ret->getMd5()] = ret;
}
return ret;
}
PhpFile *FileRepository::checkoutFile(StringData *rname,
const struct stat &s) {
FileInfo fileInfo;
PhpFile *ret = nullptr;
String name(rname);
if (rname->data()[0] != '/') {
name = String(SourceRootInfo::GetCurrentSourceRoot()) + name;
}
{
// Get the common fast path out of the way with as little locking
// as possible: it's in the map and has not changed on disk
ParsedFilesMap::const_accessor acc;
if (s_files.find(acc, name.get()) && !acc->second->isChanged(s)) {
TRACE(1, "FR fast path hit %s\n", rname->data());
ret = acc->second->getPhpFile();
ret->incRef();
return ret;
}
}
TRACE(1, "FR fast path miss: %s\n", rname->data());
bool interceptsEnabled = s_interceptsEnabled;
const StringData *n = StringData::GetStaticString(name.get());
ParsedFilesMap::accessor acc;
bool isNew = s_files.insert(acc, n);
assert(isNew || acc->second); // We don't leave null entries around.
bool isChanged = !isNew && acc->second->isChanged(s);
if (isNew || isChanged) {
if (!readFile(n, s, fileInfo)) {
// Be sure to get rid of the new reference to it.
s_files.erase(acc);
TRACE(1, "File disappeared between stat and FR::readNewFile: %s\n",
rname->data());
return nullptr;
}
ret = fileInfo.m_phpFile;
if (isChanged && ret == acc->second->getPhpFile()) {
// The file changed but had the same contents.
if (debug && md5Enabled()) {
ReadLock lock(s_md5Lock);
assert(s_md5Files.find(ret->getMd5())->second == ret);
}
ret->incRef();
return ret;
}
} else if (!isNew) {
// Somebody might have loaded the file between when we dropped
// our read lock and got the write lock
ret = acc->second->getPhpFile();
ret->incRef();
return ret;
}
// If we get here the file was not in s_files or has changed on disk
if (!ret) {
// Try to read Unit from .hhbc repo.
ret = readHhbc(n->data(), fileInfo);
}
if (!ret) {
if (isAuthoritativeRepo()) {
raise_error("Tried to parse %s in repo authoritative mode", n->data());
}
ret = parseFile(n->data(), fileInfo);
if (!ret) {
s_files.erase(acc);
return nullptr;
}
}
assert(ret != nullptr);
if (isNew) {
acc->second = new PhpFileWrapper(s, ret);
ret->incRef();
ret->setId(VM::Transl::TargetCache::allocBit());
} else {
PhpFile *f = acc->second->getPhpFile();
if (f != ret) {
ret->setId(f->getId());
tx64->invalidateFile(f); // f has changed
}
f->decRefAndDelete();
delete acc->second;
acc->second = new PhpFileWrapper(s, ret);
ret->incRef();
}
if (md5Enabled()) {
WriteLock lock(s_md5Lock);
// make sure intercepts are enabled for the functions within the
// new units
// Since we have the write lock on s_md5lock, s_interceptsEnabled
// can't change, and we are serialized wrt enableIntercepts
// (i.e., this will execute either before or after
// enableIntercepts).
if (interceptsEnabled != s_interceptsEnabled) {
// intercepts were enabled since the time we created the unit
ret->unit()->enableIntercepts();
}
s_md5Files[ret->getMd5()] = ret;
}
ret->incRef();
return ret;
}
