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| author | Cristian Cadar <cristic@cs.stanford.edu> | 2011-12-11 21:29:52 +0000 |
|---|---|---|
| committer | Cristian Cadar <cristic@cs.stanford.edu> | 2011-12-11 21:29:52 +0000 |
| commit | 4d12b8c6f4fdbd82585340d4f682f7c8d82f1ae1 (patch) | |
| tree | c192f8ea0b9df69f2a6e17a2ce54626af772228e /runtime/Intrinsic | |
| parent | 2e08a4bf1c792d8743c3f61ea7aaaf2cd513829c (diff) | |
| download | klee-4d12b8c6f4fdbd82585340d4f682f7c8d82f1ae1.tar.gz | |
This is a workaround for the infinite loop reported at
http://keeda.stanford.edu/pipermail/klee-dev/2011-August/000723.html KLEE needs to use --fno-builtin when compiling its version of memset. However, this patch also adds the workaround suggested by Paul in the thread above, since support for --fno-builtin was added to llvm-gcc only after LLVM 2.9 was released. More details about this issue can be found here: http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20110411/119376.html http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20110711/124131.html Thanks to Paul and arrowdodger for their explanations and patches. git-svn-id: https://llvm.org/svn/llvm-project/klee/trunk@146350 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'runtime/Intrinsic')
| -rw-r--r-- | runtime/Intrinsic/Makefile | 2 | ||||
| -rw-r--r-- | runtime/Intrinsic/memset.c | 2 |
2 files changed, 3 insertions, 1 deletions
diff --git a/runtime/Intrinsic/Makefile b/runtime/Intrinsic/Makefile index 721b9772..849bfeee 100644 --- a/runtime/Intrinsic/Makefile +++ b/runtime/Intrinsic/Makefile @@ -17,4 +17,6 @@ BYTECODE_LIBRARY=1 DEBUG_RUNTIME=1 NO_PEDANTIC=1 +C.Flags += -fno-builtin + include $(LEVEL)/Makefile.common diff --git a/runtime/Intrinsic/memset.c b/runtime/Intrinsic/memset.c index ee9ecb87..bef85e6a 100644 --- a/runtime/Intrinsic/memset.c +++ b/runtime/Intrinsic/memset.c @@ -10,7 +10,7 @@ #include <stdlib.h> void *memset(void * dst, int s, size_t count) { - char * a = dst; + volatile char * a = dst; while (count-- > 0) *a++ = s; return dst; |