[PATCH] D29287: [sanitizer] Fix 'dyld: Symbol not found: _memmem' linkage error on Darwin 10.6
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Thu Feb 2 23:09:53 PST 2017
This revision was automatically updated to reflect the committed changes.
Closed by commit rL293992: [sanitizer] Fix 'dyld: Symbol not found: _memmem' linkage error on Darwin 10.6 (authored by chefmax).
Changed prior to commit:
https://reviews.llvm.org/D29287?vs=86628&id=86939#toc
Repository:
rL LLVM
https://reviews.llvm.org/D29287
Files:
compiler-rt/trunk/lib/sanitizer_common/sanitizer_mac.cc
compiler-rt/trunk/lib/sanitizer_common/sanitizer_platform_interceptors.h
Index: compiler-rt/trunk/lib/sanitizer_common/sanitizer_mac.cc
===================================================================
--- compiler-rt/trunk/lib/sanitizer_common/sanitizer_mac.cc
+++ compiler-rt/trunk/lib/sanitizer_common/sanitizer_mac.cc
@@ -93,20 +93,22 @@
#include "sanitizer_syscall_generic.inc"
-// Direct syscalls, don't call libmalloc hooks.
+// Direct syscalls, don't call libmalloc hooks (but not available on 10.6).
extern "C" void *__mmap(void *addr, size_t len, int prot, int flags, int fildes,
- off_t off);
-extern "C" int __munmap(void *, size_t);
+ off_t off) SANITIZER_WEAK_ATTRIBUTE;
+extern "C" int __munmap(void *, size_t) SANITIZER_WEAK_ATTRIBUTE;
// ---------------------- sanitizer_libc.h
uptr internal_mmap(void *addr, size_t length, int prot, int flags,
int fd, u64 offset) {
if (fd == -1) fd = VM_MAKE_TAG(VM_MEMORY_ANALYSIS_TOOL);
- return (uptr)__mmap(addr, length, prot, flags, fd, offset);
+ if (__mmap) return (uptr)__mmap(addr, length, prot, flags, fd, offset);
+ return (uptr)mmap(addr, length, prot, flags, fd, offset);
}
uptr internal_munmap(void *addr, uptr length) {
- return __munmap(addr, length);
+ if (__munmap) return __munmap(addr, length);
+ return munmap(addr, length);
}
int internal_mprotect(void *addr, uptr length, int prot) {
@@ -192,17 +194,19 @@
return sigprocmask(how, set, oldset);
}
-// Doesn't call pthread_atfork() handlers.
-extern "C" pid_t __fork(void);
+// Doesn't call pthread_atfork() handlers (but not available on 10.6).
+extern "C" pid_t __fork(void) SANITIZER_WEAK_ATTRIBUTE;
int internal_fork() {
- return __fork();
+ if (__fork)
+ return __fork();
+ return fork();
}
int internal_forkpty(int *amaster) {
int master, slave;
if (openpty(&master, &slave, nullptr, nullptr, nullptr) == -1) return -1;
- int pid = __fork();
+ int pid = internal_fork();
if (pid == -1) {
close(master);
close(slave);
Index: compiler-rt/trunk/lib/sanitizer_common/sanitizer_platform_interceptors.h
===================================================================
--- compiler-rt/trunk/lib/sanitizer_common/sanitizer_platform_interceptors.h
+++ compiler-rt/trunk/lib/sanitizer_common/sanitizer_platform_interceptors.h
@@ -83,8 +83,16 @@
#define SANITIZER_INTERCEPT_MEMMOVE 1
#define SANITIZER_INTERCEPT_MEMCPY 1
#define SANITIZER_INTERCEPT_MEMCMP 1
+#if defined(__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__) && \
+ __ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ < 1070
+# define SI_MAC_DEPLOYMENT_BELOW_10_7 1
+#else
+# define SI_MAC_DEPLOYMENT_BELOW_10_7 0
+#endif
+// memmem on Darwin doesn't exist on 10.6
// FIXME: enable memmem on Windows.
-#define SANITIZER_INTERCEPT_MEMMEM SI_NOT_WINDOWS
+#define SANITIZER_INTERCEPT_MEMMEM \
+ SI_NOT_WINDOWS && !SI_MAC_DEPLOYMENT_BELOW_10_7
#define SANITIZER_INTERCEPT_MEMCHR 1
#define SANITIZER_INTERCEPT_MEMRCHR SI_FREEBSD || SI_LINUX
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