Fix http://llvm.org/PR4822: allow module deletion after a function has been

compiled.

When functions are compiled, they accumulate references in the JITResolver's
stub maps. This patch removes those references when the functions are
destroyed.  It's illegal to destroy a Function when any thread may still try to
call its machine code.

This patch also updates r83987 to use ValueMap instead of explicit CallbackVHs
and fixes a couple "do stuff inside assert()" bugs from r84522.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@84975 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 13 insertions, 26 deletions

diff --git a/include/llvm/ExecutionEngine/ExecutionEngine.h b/include/llvm/ExecutionEngine/ExecutionEngine.h
index b9da0fc..92f552d 100644
--- a/include/llvm/ExecutionEngine/ExecutionEngine.h
+++ b/include/llvm/ExecutionEngine/ExecutionEngine.h
@@ -19,6 +19,7 @@
 #include <map>
 #include <string>
 #include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/ValueMap.h"
 #include "llvm/Support/ValueHandle.h"
 #include "llvm/System/Mutex.h"
 #include "llvm/Target/TargetMachine.h"
@@ -42,26 +43,23 @@ class Type;
 
 class ExecutionEngineState {
 public:
-  class MapUpdatingCVH : public CallbackVH {
-    ExecutionEngineState &EES;
-
-  public:
-    MapUpdatingCVH(ExecutionEngineState &EES, const GlobalValue *GV);
-
-    operator const GlobalValue*() const {
-      return cast<GlobalValue>(getValPtr());
-    }
-
-    virtual void deleted();
-    virtual void allUsesReplacedWith(Value *new_value);
+  struct AddressMapConfig : public ValueMapConfig<const GlobalValue*> {
+    typedef ExecutionEngineState *ExtraData;
+    static sys::Mutex *getMutex(ExecutionEngineState *EES);
+    static void onDelete(ExecutionEngineState *EES, const GlobalValue *Old);
+    static void onRAUW(ExecutionEngineState *, const GlobalValue *,
+                       const GlobalValue *);
   };
 
+  typedef ValueMap<const GlobalValue *, void *, AddressMapConfig>
+      GlobalAddressMapTy;
+
 private:
   ExecutionEngine &EE;
 
   /// GlobalAddressMap - A mapping between LLVM global values and their
   /// actualized version...
-  std::map<MapUpdatingCVH, void *> GlobalAddressMap;
+  GlobalAddressMapTy GlobalAddressMap;
 
   /// GlobalAddressReverseMap - This is the reverse mapping of GlobalAddressMap,
   /// used to convert raw addresses into the LLVM global value that is emitted
@@ -70,13 +68,9 @@ private:
   std::map<void *, AssertingVH<const GlobalValue> > GlobalAddressReverseMap;
 
 public:
-  ExecutionEngineState(ExecutionEngine &EE) : EE(EE) {}
+  ExecutionEngineState(ExecutionEngine &EE);
 
-  MapUpdatingCVH getVH(const GlobalValue *GV) {
-    return MapUpdatingCVH(*this, GV);
-  }
-
-  std::map<MapUpdatingCVH, void *> &
+  GlobalAddressMapTy &
   getGlobalAddressMap(const MutexGuard &) {
     return GlobalAddressMap;
   }
@@ -485,15 +479,8 @@ class EngineBuilder {
   }
 
   ExecutionEngine *create();
-
 };
 
-inline bool operator<(const ExecutionEngineState::MapUpdatingCVH& lhs,
-                      const ExecutionEngineState::MapUpdatingCVH& rhs) {
-    return static_cast<const GlobalValue*>(lhs) <
-        static_cast<const GlobalValue*>(rhs);
-}
-
 } // End llvm namespace
 
 #endif