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[libFuzzer] Break dependency on common_interface_defs.h

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Some libFuzzer users build using the build.sh script, without access to
the <sanitizer/common_interface_defs.h> include.

Update https://github.com/rust-fuzz/libfuzzer/issues/65.

Reviewed By: dokyungs

Differential Revision: https://reviews.llvm.org/D86981
This commit is contained in:
Matt Morehouse 2020-09-01 15:35:01 -07:00
parent 0c2d872d5d
commit 49dda4e58a
1 changed files with 19 additions and 1 deletions
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20
compiler-rt/lib/fuzzer/FuzzerInterceptors.cpp
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@ -27,7 +27,6 @@
#include <cassert>
#include <cstdint>
#include <dlfcn.h> // for dlsym()
#include <sanitizer/common_interface_defs.h>
static void *getFuncAddr(const char *name, uintptr_t wrapper_addr) {
void *addr = dlsym(RTLD_NEXT, name);
@ -119,6 +118,25 @@ static char *internal_strstr(const char *haystack, const char *needle) {
extern "C" {
// Weak hooks forward-declared to avoid dependency on
// <sanitizer/common_interface_defs.h>.
void __sanitizer_weak_hook_memcmp(void *called_pc, const void *s1,
const void *s2, size_t n, int result);
void __sanitizer_weak_hook_strncmp(void *called_pc, const char *s1,
const char *s2, size_t n, int result);
void __sanitizer_weak_hook_strncasecmp(void *called_pc, const char *s1,
const char *s2, size_t n, int result);
void __sanitizer_weak_hook_strcmp(void *called_pc, const char *s1,
const char *s2, int result);
void __sanitizer_weak_hook_strcasecmp(void *called_pc, const char *s1,
const char *s2, int result);
void __sanitizer_weak_hook_strstr(void *called_pc, const char *s1,
const char *s2, char *result);
void __sanitizer_weak_hook_strcasestr(void *called_pc, const char *s1,
const char *s2, char *result);
void __sanitizer_weak_hook_memmem(void *called_pc, const void *s1, size_t len1,
const void *s2, size_t len2, void *result);
DEFINE_REAL(int, bcmp, const void *, const void *, size_t)
DEFINE_REAL(int, memcmp, const void *, const void *, size_t)
DEFINE_REAL(int, strncmp, const char *, const char *, size_t)