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| author | Kostya Serebryany <kcc@google.com> | 2015-05-07 00:04:39 +0000 |
|---|---|---|
| committer | Kostya Serebryany <kcc@google.com> | 2015-05-07 00:04:39 +0000 |
| commit | 0d1fa9f3440bb80cf016341a5948097533be95fa (patch) | |
| tree | b3f20dc462c64a48fb3851f8b29b0d7b43499881 /lib/dfsan/dfsan_custom.cc | |
| parent | 12e289a3b21337ea63845d55d36cf7b3931a0dc0 (diff) | |
Add dfsan_weak_hook_memcmp
Summary:
Add a weak hook to be called from dfsan's custom memcmp.
The primary user will be lib/Fuzzer.
If this works well we'll add more hooks (strcmp, etc).
Test Plan: Will be covered by lib/Fuzzer tests.
Reviewers: pcc
Reviewed By: pcc
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D9541
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@236679 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/dfsan/dfsan_custom.cc')
| -rw-r--r-- | lib/dfsan/dfsan_custom.cc | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/lib/dfsan/dfsan_custom.cc b/lib/dfsan/dfsan_custom.cc index 35f6fb4cd..c58b471db 100644 --- a/lib/dfsan/dfsan_custom.cc +++ b/lib/dfsan/dfsan_custom.cc @@ -82,11 +82,20 @@ SANITIZER_INTERFACE_ATTRIBUTE char *__dfsw_strchr(const char *s, int c, } } +SANITIZER_INTERFACE_ATTRIBUTE SANITIZER_WEAK_ATTRIBUTE +void +dfsan_weak_hook_memcmp(uptr caller_pc, const void *s1, const void *s2, size_t n, + dfsan_label s1_label, dfsan_label s2_label, + dfsan_label n_label); + SANITIZER_INTERFACE_ATTRIBUTE int __dfsw_memcmp(const void *s1, const void *s2, size_t n, dfsan_label s1_label, dfsan_label s2_label, dfsan_label n_label, dfsan_label *ret_label) { + if (dfsan_weak_hook_memcmp) + dfsan_weak_hook_memcmp(GET_CALLER_PC(), s1, s2, n, s1_label, s2_label, + n_label); const char *cs1 = (const char *) s1, *cs2 = (const char *) s2; for (size_t i = 0; i != n; ++i) { if (cs1[i] != cs2[i]) { |