#include "llvm/PassSupport.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/Mutex.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/StringMap.h"
+#include "llvm/Function.h"
#include <vector>
using namespace llvm;
-static PassRegistry *PassRegistryObj = 0;
-PassRegistry *PassRegistry::getPassRegistry() {
- // Use double-checked locking to safely initialize the registrar when
- // we're running in multithreaded mode.
- PassRegistry* tmp = PassRegistryObj;
- if (llvm_is_multithreaded()) {
- sys::MemoryFence();
- if (!tmp) {
- llvm_acquire_global_lock();
- tmp = PassRegistryObj;
- if (!tmp) {
- tmp = new PassRegistry();
- sys::MemoryFence();
- PassRegistryObj = tmp;
- }
- llvm_release_global_lock();
- }
- } else if (!tmp) {
- PassRegistryObj = new PassRegistry();
- }
-
- return PassRegistryObj;
-}
-
-namespace {
-
-// FIXME: We use ManagedCleanup to erase the pass registrar on shutdown.
+// FIXME: We use ManagedStatic to erase the pass registrar on shutdown.
// Unfortunately, passes are registered with static ctors, and having
-// llvm_shutdown clear this map prevents successful ressurection after
+// llvm_shutdown clear this map prevents successful resurrection after
// llvm_shutdown is run. Ideally we should find a solution so that we don't
// leak the map, AND can still resurrect after shutdown.
-void cleanupPassRegistry(void*) {
- if (PassRegistryObj) {
- delete PassRegistryObj;
- PassRegistryObj = 0;
- }
+static ManagedStatic<PassRegistry> PassRegistryObj;
+PassRegistry *PassRegistry::getPassRegistry() {
+ return &*PassRegistryObj;
}
-ManagedCleanup<&cleanupPassRegistry> registryCleanup ATTRIBUTE_USED;
-}
+static ManagedStatic<sys::SmartMutex<true> > Lock;
//===----------------------------------------------------------------------===//
// PassRegistryImpl
//
+namespace {
struct PassRegistryImpl {
/// PassInfoMap - Keep track of the PassInfo object for each registered pass.
typedef DenseMap<const void*, const PassInfo*> MapType;
};
DenseMap<const PassInfo*, AnalysisGroupInfo> AnalysisGroupInfoMap;
+ std::vector<const PassInfo*> ToFree;
std::vector<PassRegistrationListener*> Listeners;
};
+} // end anonymous namespace
void *PassRegistry::getImpl() const {
if (!pImpl)
// Accessors
//
+PassRegistry::~PassRegistry() {
+ sys::SmartScopedLock<true> Guard(*Lock);
+ PassRegistryImpl *Impl = static_cast<PassRegistryImpl*>(pImpl);
+
+ for (std::vector<const PassInfo*>::iterator I = Impl->ToFree.begin(),
+ E = Impl->ToFree.end(); I != E; ++I)
+ delete *I;
+
+ delete Impl;
+ pImpl = 0;
+}
+
const PassInfo *PassRegistry::getPassInfo(const void *TI) const {
+ sys::SmartScopedLock<true> Guard(*Lock);
PassRegistryImpl *Impl = static_cast<PassRegistryImpl*>(getImpl());
PassRegistryImpl::MapType::const_iterator I = Impl->PassInfoMap.find(TI);
return I != Impl->PassInfoMap.end() ? I->second : 0;
}
const PassInfo *PassRegistry::getPassInfo(StringRef Arg) const {
+ sys::SmartScopedLock<true> Guard(*Lock);
PassRegistryImpl *Impl = static_cast<PassRegistryImpl*>(getImpl());
PassRegistryImpl::StringMapType::const_iterator
I = Impl->PassInfoStringMap.find(Arg);
// Pass Registration mechanism
//
-void PassRegistry::registerPass(const PassInfo &PI) {
+void PassRegistry::registerPass(const PassInfo &PI, bool ShouldFree) {
+ sys::SmartScopedLock<true> Guard(*Lock);
PassRegistryImpl *Impl = static_cast<PassRegistryImpl*>(getImpl());
bool Inserted =
Impl->PassInfoMap.insert(std::make_pair(PI.getTypeInfo(),&PI)).second;
- assert(Inserted && "Pass registered multiple times!"); Inserted=Inserted;
+ assert(Inserted && "Pass registered multiple times!");
+ (void)Inserted;
Impl->PassInfoStringMap[PI.getPassArgument()] = &PI;
// Notify any listeners.
for (std::vector<PassRegistrationListener*>::iterator
I = Impl->Listeners.begin(), E = Impl->Listeners.end(); I != E; ++I)
(*I)->passRegistered(&PI);
+
+ if (ShouldFree) Impl->ToFree.push_back(&PI);
}
void PassRegistry::unregisterPass(const PassInfo &PI) {
+ sys::SmartScopedLock<true> Guard(*Lock);
PassRegistryImpl *Impl = static_cast<PassRegistryImpl*>(getImpl());
PassRegistryImpl::MapType::iterator I =
Impl->PassInfoMap.find(PI.getTypeInfo());
}
void PassRegistry::enumerateWith(PassRegistrationListener *L) {
+ sys::SmartScopedLock<true> Guard(*Lock);
PassRegistryImpl *Impl = static_cast<PassRegistryImpl*>(getImpl());
for (PassRegistryImpl::MapType::const_iterator I = Impl->PassInfoMap.begin(),
E = Impl->PassInfoMap.end(); I != E; ++I)
void PassRegistry::registerAnalysisGroup(const void *InterfaceID,
const void *PassID,
PassInfo& Registeree,
- bool isDefault) {
+ bool isDefault,
+ bool ShouldFree) {
PassInfo *InterfaceInfo = const_cast<PassInfo*>(getPassInfo(InterfaceID));
if (InterfaceInfo == 0) {
// First reference to Interface, register it now.
assert(ImplementationInfo &&
"Must register pass before adding to AnalysisGroup!");
+ sys::SmartScopedLock<true> Guard(*Lock);
+
// Make sure we keep track of the fact that the implementation implements
// the interface.
ImplementationInfo->addInterfaceImplemented(InterfaceInfo);
InterfaceInfo->setNormalCtor(ImplementationInfo->getNormalCtor());
}
}
+
+ PassRegistryImpl *Impl = static_cast<PassRegistryImpl*>(getImpl());
+ if (ShouldFree) Impl->ToFree.push_back(&Registeree);
}
void PassRegistry::addRegistrationListener(PassRegistrationListener *L) {
+ sys::SmartScopedLock<true> Guard(*Lock);
PassRegistryImpl *Impl = static_cast<PassRegistryImpl*>(getImpl());
Impl->Listeners.push_back(L);
}
void PassRegistry::removeRegistrationListener(PassRegistrationListener *L) {
+ sys::SmartScopedLock<true> Guard(*Lock);
+
+ // NOTE: This is necessary, because removeRegistrationListener() can be called
+ // as part of the llvm_shutdown sequence. Since we have no control over the
+ // order of that sequence, we need to gracefully handle the case where the
+ // PassRegistry is destructed before the object that triggers this call.
+ if (!pImpl) return;
+
PassRegistryImpl *Impl = static_cast<PassRegistryImpl*>(getImpl());
std::vector<PassRegistrationListener*>::iterator I =
std::find(Impl->Listeners.begin(), Impl->Listeners.end(), L);