commit ef3fb4c00d0af83997f6a4d4fd2406b831d946e7
author Zhongxing Xu <xuzhongxing@gmail.com> Fri Apr 10 08:45:10 2009 +0000
committer Zhongxing Xu <xuzhongxing@gmail.com> Fri Apr 10 08:45:10 2009 +0000
tree be346b26868811c18a726420ad7d3c931d0331b3
parent 44c1151a30b261f3823ca71b9418d784c403bd85

Add prototype for CodeTextRegion.
A CodeTextRegion wraps two kinds of data: FunctionDecl* or SymbolRef. 
The latter comes from the symbolic function pointer that are generated from
function calls or input data.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68777 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Analysis/SVals.cpp

diff --git a/lib/Analysis/SVals.cpp b/lib/Analysis/SVals.cpp
index 3e958ba..572d5ec 100644
--- a/lib/Analysis/SVals.cpp
+++ b/lib/Analysis/SVals.cpp
@@ -282,6 +282,12 @@
                                 
   if (const TypedRegion* TR = dyn_cast<TypedRegion>(R)) {
     QualType T = TR->getRValueType(SymMgr.getContext());
+
+    // If T is of function pointer type, create a CodeTextRegion wrapping a
+    // symbol.
+    if (T->isFunctionPointerType()) {
+      return Loc::MakeVal(MemMgr.getCodeTextRegion(sym, T));
+    }
     
     if (Loc::IsLocType(T))
       return Loc::MakeVal(MemMgr.getSymbolicRegion(sym));
@@ -298,6 +304,12 @@
   QualType T = E->getType();
   SymbolRef sym = SymMgr.getConjuredSymbol(E, Count);
 
+  // If T is of function pointer type, create a CodeTextRegion wrapping a
+  // symbol.
+  if (T->isFunctionPointerType()) {
+    return Loc::MakeVal(MemMgr.getCodeTextRegion(sym, T));
+  }
+
   if (Loc::IsLocType(T))
     return Loc::MakeVal(MemMgr.getSymbolicRegion(sym));
 
@@ -312,6 +324,12 @@
 
   SymbolRef sym = SymMgr.getConjuredSymbol(E, T, Count);
 
+  // If T is of function pointer type, create a CodeTextRegion wrapping a
+  // symbol.
+  if (T->isFunctionPointerType()) {
+    return Loc::MakeVal(MemMgr.getCodeTextRegion(sym, T));
+  }
+
   if (Loc::IsLocType(T))
     return Loc::MakeVal(MemMgr.getSymbolicRegion(sym));
 
@@ -321,6 +339,12 @@
   return UnknownVal();
 }
 
+SVal ValueManager::getFunctionPointer(const FunctionDecl* FD) {
+  CodeTextRegion* R 
+    = MemMgr.getCodeTextRegion(FD, Context.getPointerType(FD->getType()));
+  return Loc::MakeVal(R);
+}
+
 nonloc::LocAsInteger nonloc::LocAsInteger::Make(BasicValueFactory& Vals, Loc V,
                                                 unsigned Bits) {
   return LocAsInteger(Vals.getPersistentSValWithData(V, Bits));