[llvm-commits] [llvm] r43783 - in /llvm/trunk: include/llvm/Bitcode/Deserialize.h lib/Bitcode/Reader/Deserialize.cpp

[Ted Kremenek]

Author: kremenek
Date: Tue Nov  6 16:21:14 2007
New Revision: 43783

URL: http://llvm.org/viewvc/llvm-project?rev=43783&view=rev
Log:
Augmented ReadPtr and ReadOwnedPtr to control whether or not a pointer is 
allowed to be backpatched
or can be registered with the deserializer to backpatch other pointers.

Modified:
    llvm/trunk/include/llvm/Bitcode/Deserialize.h
    llvm/trunk/lib/Bitcode/Reader/Deserialize.cpp

Modified: llvm/trunk/include/llvm/Bitcode/Deserialize.h
URL: 
http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Bitcode/Deserialize.h?rev=43783&r1=43782&r2=43783&view=diff

==============================================================================
--- llvm/trunk/include/llvm/Bitcode/Deserialize.h (original)
+++ llvm/trunk/include/llvm/Bitcode/Deserialize.h Tue Nov  6 16:21:14 2007
@@ -114,33 +114,36 @@
   void ReadCStr(std::vector<char>& buff, bool isNullTerm=false);
 
   template <typename T>
-  inline T* ReadOwnedPtr() {    
+  inline T* ReadOwnedPtr(bool AutoRegister = true) {
     unsigned PtrId = ReadInt();
 
     if (PtrId == 0)
       return NULL;
     
     T* x = SerializeTrait<T>::Materialize(*this);
-    RegisterPtr(PtrId,x);
+    
+    if (AutoRegister)
+      RegisterPtr(PtrId,x);
+    
     return x;
   }
   
   template <typename T>
-  inline void ReadOwnedPtr(T*& Ptr) {
-    Ptr = ReadOwnedPtr<T>();
+  inline void ReadOwnedPtr(T*& Ptr, bool AutoRegister = true) {
+    Ptr = ReadOwnedPtr<T>(AutoRegister);
   }
   
   template <typename T>
-  void ReadPtr(T*& PtrRef) {
-    ReadUIntPtr(reinterpret_cast<uintptr_t&>(PtrRef));
+  void ReadPtr(T*& PtrRef, bool AllowBackpatch = true) {
+    ReadUIntPtr(reinterpret_cast<uintptr_t&>(PtrRef), AllowBackpatch);
   }
   
   template <typename T>
-  void ReadPtr(const T*& PtrRef) {
-    ReadPtr(const_cast<T*&>(PtrRef));
+  void ReadPtr(const T*& PtrRef, bool AllowBackpatch = true) {
+    ReadPtr(const_cast<T*&>(PtrRef), AllowBackpatch);
   }            
 
-  void ReadUIntPtr(uintptr_t& PtrRef);
+  void ReadUIntPtr(uintptr_t& PtrRef, bool AllowBackpatch = true);
   
   template <typename T>
   T& ReadRef() {

Modified: llvm/trunk/lib/Bitcode/Reader/Deserialize.cpp
URL: 
http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Bitcode/Reader/Deserialize.cpp?rev=43783&r1=43782&r2=43783&view=diff

==============================================================================
--- llvm/trunk/lib/Bitcode/Reader/Deserialize.cpp (original)
+++ llvm/trunk/lib/Bitcode/Reader/Deserialize.cpp Tue Nov  6 16:21:14 2007
@@ -152,7 +152,7 @@
   SetPtr(E,Ptr);
 }
 
-void Deserializer::ReadUIntPtr(uintptr_t& PtrRef) {
+void Deserializer::ReadUIntPtr(uintptr_t& PtrRef, bool AllowBackpatch) {
   unsigned PtrId = ReadInt();
   
   if (PtrId == 0) {
@@ -169,6 +169,9 @@
   if (HasFinalPtr(E))
     PtrRef = GetFinalPtr(E);
   else {
+    assert (AllowBackpatch &&
+            "Client forbids backpatching for this pointer.");
+    
     // Register backpatch.  Check the freelist for a BPNode.
     BPNode* N;
 


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