#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/Mutex.h"
#include "llvm/Support/MutexGuard.h"
+#include "llvm/Support/ManagedStatic.h"
using namespace llvm;
/// modify global variables.
llvm::sys::Mutex JITDebugLock;
-/// Acquire the lock and do the registration.
+/// Do the registration.
void NotifyDebugger(jit_code_entry* JITCodeEntry) {
- llvm::MutexGuard locked(JITDebugLock);
__jit_debug_descriptor.action_flag = JIT_REGISTER_FN;
// Insert this entry at the head of the list.
GDBJITRegistrar::~GDBJITRegistrar() {
// Free all registered object files.
- for (RegisteredObjectBufferMap::iterator I = ObjectBufferMap.begin(), E = ObjectBufferMap.end();
+ llvm::MutexGuard locked(JITDebugLock);
+ for (RegisteredObjectBufferMap::iterator I = ObjectBufferMap.begin(), E = ObjectBufferMap.end();
I != E; ++I) {
// Call the private method that doesn't update the map so our iterator
// doesn't break.
size_t Size = Object.getBufferSize();
assert(Buffer && "Attempt to register a null object with a debugger.");
+ llvm::MutexGuard locked(JITDebugLock);
assert(ObjectBufferMap.find(Buffer) == ObjectBufferMap.end() &&
"Second attempt to perform debug registration.");
jit_code_entry* JITCodeEntry = new jit_code_entry();
bool GDBJITRegistrar::deregisterObject(const ObjectBuffer& Object) {
const char *Buffer = Object.getBufferStart();
+ llvm::MutexGuard locked(JITDebugLock);
RegisteredObjectBufferMap::iterator I = ObjectBufferMap.find(Buffer);
if (I != ObjectBufferMap.end()) {
jit_code_entry*& JITCodeEntry = I->second.second;
- // Acquire the lock and do the unregistration.
+ // Do the unregistration.
{
- llvm::MutexGuard locked(JITDebugLock);
__jit_debug_descriptor.action_flag = JIT_UNREGISTER_FN;
// Remove the jit_code_entry from the linked list.
JITCodeEntry = NULL;
}
+llvm::ManagedStatic<GDBJITRegistrar> TheRegistrar;
+
} // end namespace
namespace llvm {
JITRegistrar& JITRegistrar::getGDBRegistrar() {
- static GDBJITRegistrar* sRegistrar = NULL;
- if (sRegistrar == NULL) {
- // The mutex is here so that it won't slow down access once the registrar
- // is instantiated
- llvm::MutexGuard locked(JITDebugLock);
- // Check again to be sure another thread didn't create this while we waited
- if (sRegistrar == NULL) {
- sRegistrar = new GDBJITRegistrar;
- }
- }
- return *sRegistrar;
+ return *TheRegistrar;
}
} // namespace llvm