When a function takes a variable number of pointer arguments, with a zero
pointer marking the end of the list, the zero *must* be cast to the pointer
type. An un-cast zero is a 32-bit int, and at least on x86_64, gcc will
not extend the zero to 64 bits, thus allowing the upper 32 bits to be
random junk.
The new END_WITH_NULL macro may be used to annotate a such a function
so that GCC (version 4 or newer) will detect the use of un-casted zero
at compile time.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@23888 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Debugger/UnixLocalInferiorProcess.cpp b/lib/Debugger/UnixLocalInferiorProcess.cpp
index 1731bea..6758e2d 100644
--- a/lib/Debugger/UnixLocalInferiorProcess.cpp
+++ b/lib/Debugger/UnixLocalInferiorProcess.cpp
@@ -924,7 +924,8 @@
// If the program didn't explicitly call exit, call exit now, for the program.
// This ensures that any atexit handlers get called correctly.
- Function *Exit = M->getOrInsertFunction("exit", Type::VoidTy, Type::IntTy, 0);
+ Function *Exit = M->getOrInsertFunction("exit", Type::VoidTy, Type::IntTy,
+ (Type *)0);
std::vector<GenericValue> Args;
GenericValue ResultGV;