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da75f7277e
This gives us better leak detection messages, like `Value` has. This also has the side effect of papering over a problem where `MachineInstr`s are added as garbage to the leak detector and then deleted without being removed. If `MDNode::getTemporary()` allocates an `MDNodeFwdDecl` in the same spot, the leak detector asserts. By separating `MDNode`s into their own container we lose that assertion. Since `MachineInstr` is required to have a trivial destructor, its usage of `LeakDetector` at all is pretty suspect. I'll be sending a patch soon to strip that out. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224060 91177308-0d34-0410-b5e6-96231b3b80d8
83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
//===-- LeakDetector.cpp - Implement LeakDetector interface ---------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This file implements the LeakDetector class.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/IR/LeakDetector.h"
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#include "LLVMContextImpl.h"
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#include "llvm/ADT/SmallPtrSet.h"
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#include "llvm/IR/Metadata.h"
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#include "llvm/IR/Value.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/ManagedStatic.h"
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#include "llvm/Support/Mutex.h"
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#include "llvm/Support/Threading.h"
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using namespace llvm;
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static ManagedStatic<sys::SmartMutex<true> > ObjectsLock;
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static ManagedStatic<LeakDetectorImpl<void> > Objects;
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static void clearGarbage(LLVMContext &Context) {
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Objects->clear();
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Context.pImpl->LLVMObjects.clear();
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}
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void LeakDetector::addGarbageObjectImpl(void *Object) {
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sys::SmartScopedLock<true> Lock(*ObjectsLock);
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Objects->addGarbage(Object);
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}
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void LeakDetector::addGarbageObjectImpl(const Value *Object) {
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LLVMContextImpl *pImpl = Object->getContext().pImpl;
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pImpl->LLVMObjects.addGarbage(Object);
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}
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void LeakDetector::addGarbageObjectImpl(const MDNode *Object) {
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LLVMContextImpl *pImpl = Object->getContext().pImpl;
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pImpl->LLVMMDObjects.addGarbage(Object);
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}
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void LeakDetector::removeGarbageObjectImpl(void *Object) {
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sys::SmartScopedLock<true> Lock(*ObjectsLock);
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Objects->removeGarbage(Object);
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}
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void LeakDetector::removeGarbageObjectImpl(const Value *Object) {
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LLVMContextImpl *pImpl = Object->getContext().pImpl;
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pImpl->LLVMObjects.removeGarbage(Object);
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}
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void LeakDetector::removeGarbageObjectImpl(const MDNode *Object) {
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LLVMContextImpl *pImpl = Object->getContext().pImpl;
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pImpl->LLVMMDObjects.removeGarbage(Object);
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}
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void LeakDetector::checkForGarbageImpl(LLVMContext &Context,
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const std::string &Message) {
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LLVMContextImpl *pImpl = Context.pImpl;
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sys::SmartScopedLock<true> Lock(*ObjectsLock);
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Objects->setName("GENERIC");
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pImpl->LLVMObjects.setName("LLVM");
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pImpl->LLVMMDObjects.setName("LLVM-MD");
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// use non-short-circuit version so that both checks are performed
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if (Objects->hasGarbage(Message) |
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pImpl->LLVMObjects.hasGarbage(Message) |
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pImpl->LLVMMDObjects.hasGarbage(Message))
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errs() << "\nThis is probably because you removed an object, but didn't "
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<< "delete it. Please check your code for memory leaks.\n";
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// Clear out results so we don't get duplicate warnings on
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// next call...
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clearGarbage(Context);
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}
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