Move default to top of switch

[oota-llvm.git] / lib / VMCore / LeakDetector.cpp

diff --git a/lib/VMCore/LeakDetector.cpp b/lib/VMCore/LeakDetector.cpp
index c8e7f4c6a52adbecdfcf57b2fbffe0a7243f4cc6..f6651e93e273222d207cfd81801a97c496fc2e56 100644 (file)
--- a/lib/VMCore/LeakDetector.cpp
+++ b/lib/VMCore/LeakDetector.cpp
@@ -1,131 +1,69 @@
 //===-- LeakDetector.cpp - Implement LeakDetector interface ---------------===//
-// 
+//
 //                     The LLVM Compiler Infrastructure
 //
-// This file was developed by the LLVM research group and is distributed under
-// the University of Illinois Open Source License. See LICENSE.TXT for details.
-// 
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
 //===----------------------------------------------------------------------===//
 //
 // This file implements the LeakDetector class.
 //
 //===----------------------------------------------------------------------===//
 
+#include "LLVMContextImpl.h"
 #include "llvm/Support/LeakDetector.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/Support/Compiler.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/Mutex.h"
+#include "llvm/Support/Threading.h"
 #include "llvm/Value.h"
-#include <iostream>
-#include <set>
 using namespace llvm;
 
-namespace {
-  template <class T>
-  struct PrinterTrait {
-    static void print(const T* P) { std::cerr << P; }
-  };
-
-  template<>
-  struct PrinterTrait<Value> {
-    static void print(const Value* P) { std::cerr << *P; }
-  };
-
-  template <typename T>
-  struct LeakDetectorImpl {
-    LeakDetectorImpl(const char* const name) : Cache(0), Name(name) { }
-
-    // Because the most common usage pattern, by far, is to add a
-    // garbage object, then remove it immediately, we optimize this
-    // case.  When an object is added, it is not added to the set
-    // immediately, it is added to the CachedValue Value.  If it is
-    // immediately removed, no set search need be performed.
-    void addGarbage(const T* o) {
-      if (Cache) {
-        assert(Ts.count(Cache) == 0 && "Object already in set!");
-        Ts.insert(Cache);
-      }
-      Cache = o;
-    }
-
-    void removeGarbage(const T* o) {
-      if (o == Cache)
-        Cache = 0; // Cache hit
-      else
-        Ts.erase(o);
-    }
-
-    bool hasGarbage(const std::string& Message) {
-      addGarbage(0); // Flush the Cache
-
-      assert(Cache == 0 && "No value should be cached anymore!");
-
-      if (!Ts.empty()) {
-        std::cerr
-            << "Leaked " << Name << " objects found: " << Message << ":\n";
-        for (typename std::set<const T*>::iterator I = Ts.begin(),
-               E = Ts.end(); I != E; ++I) {
-          std::cerr << "\t";
-          PrinterTrait<T>::print(*I);
-          std::cerr << "\n";
-        }
-        std::cerr << '\n';
-
-        return true;
-      }
-      return false;
-    }
-
-  private:
-    std::set<const T*> Ts;
-    const T* Cache;
-    const char* const Name;
-  };
-
-  LeakDetectorImpl<void>  *Objects;
-  LeakDetectorImpl<Value> *LLVMObjects;
-
-  LeakDetectorImpl<void> &getObjects() {
-    if (Objects == 0)
-      Objects = new LeakDetectorImpl<void>("GENERIC");
-    return *Objects;
-  }
-
-  LeakDetectorImpl<Value> &getLLVMObjects() {
-    if (LLVMObjects == 0)
-      LLVMObjects = new LeakDetectorImpl<Value>("LLVM");
-    return *LLVMObjects;
-  }
+static ManagedStatic<sys::SmartMutex<true> > ObjectsLock;
+static ManagedStatic<LeakDetectorImpl<void> > Objects;
 
-  void clearGarbage() {
-    delete Objects;
-    delete LLVMObjects;
-    Objects = 0;
-    LLVMObjects = 0;
-  }
+static void clearGarbage(LLVMContext &Context) {
+  Objects->clear();
+  Context.pImpl->LLVMObjects.clear();
 }
 
 void LeakDetector::addGarbageObjectImpl(void *Object) {
-  getObjects().addGarbage(Object);
+  sys::SmartScopedLock<true> Lock(*ObjectsLock);
+  Objects->addGarbage(Object);
 }
 
 void LeakDetector::addGarbageObjectImpl(const Value *Object) {
-  getLLVMObjects().addGarbage(Object);
+  LLVMContextImpl *pImpl = Object->getContext().pImpl;
+  pImpl->LLVMObjects.addGarbage(Object);
 }
 
 void LeakDetector::removeGarbageObjectImpl(void *Object) {
-  getObjects().removeGarbage(Object);
+  sys::SmartScopedLock<true> Lock(*ObjectsLock);
+  Objects->removeGarbage(Object);
 }
 
 void LeakDetector::removeGarbageObjectImpl(const Value *Object) {
-  getLLVMObjects().removeGarbage(Object);
+  LLVMContextImpl *pImpl = Object->getContext().pImpl;
+  pImpl->LLVMObjects.removeGarbage(Object);
 }
 
-void LeakDetector::checkForGarbageImpl(const std::string &Message) {
+void LeakDetector::checkForGarbageImpl(LLVMContext &Context, 
+                                       const std::string &Message) {
+  LLVMContextImpl *pImpl = Context.pImpl;
+  sys::SmartScopedLock<true> Lock(*ObjectsLock);
+  
+  Objects->setName("GENERIC");
+  pImpl->LLVMObjects.setName("LLVM");
+  
   // use non-short-circuit version so that both checks are performed
-  if (getObjects().hasGarbage(Message) |
-      getLLVMObjects().hasGarbage(Message))
-    std::cerr << "\nThis is probably because you removed an object, but didn't "
-                 "delete it.  Please check your code for memory leaks.\n";
+  if (Objects->hasGarbage(Message) |
+      pImpl->LLVMObjects.hasGarbage(Message))
+    errs() << "\nThis is probably because you removed an object, but didn't "
+           << "delete it.  Please check your code for memory leaks.\n";
 
   // Clear out results so we don't get duplicate warnings on
   // next call...
-  clearGarbage();
+  clearGarbage(Context);
 }