tsan: port to freebsd

llvm-svn: 211418

compiler-rt/lib/tsan/rtl/tsan_platform_linux.cc

@@ -14,7 +14,7 @@
 
 
 #include "sanitizer_common/sanitizer_platform.h"
-#if SANITIZER_LINUX
+#if SANITIZER_LINUX || SANITIZER_FREEBSD
 
 #include "sanitizer_common/sanitizer_common.h"
 #include "sanitizer_common/sanitizer_libc.h"
@@ -42,8 +42,10 @@
 #include <errno.h>
 #include <sched.h>
 #include <dlfcn.h>
+#if SANITIZER_LINUX
 #define __need_res_state
 #include <resolv.h>
+#endif
 
 #ifdef sa_handler
 # undef sa_handler
@@ -53,6 +55,11 @@
 # undef sa_sigaction
 #endif
 
+#if SANITIZER_FREEBSD
+extern "C" void *__libc_stack_end;
+void *__libc_stack_end = 0;
+#endif
+
 namespace __tsan {
 
 const uptr kPageSize = 4096;
@@ -107,15 +114,18 @@ uptr GetRSS() {
   return mem[6];
 }
 
-
+#if SANITIZER_LINUX
 void FlushShadowMemoryCallback(
     const SuspendedThreadsList &suspended_threads_list,
     void *argument) {
   FlushUnneededShadowMemory(kLinuxShadowBeg, kLinuxShadowEnd - kLinuxShadowBeg);
 }
+#endif
 
 void FlushShadowMemory() {
+#if SANITIZER_LINUX
   StopTheWorld(FlushShadowMemoryCallback, 0);
+#endif
 }
 
 #ifndef TSAN_GO
@@ -360,6 +370,7 @@ bool IsGlobalVar(uptr addr) {
 // This is required to properly "close" the fds, because we do not see internal
 // closes within glibc. The code is a pure hack.
 int ExtractResolvFDs(void *state, int *fds, int nfd) {
+#if SANITIZER_LINUX
   int cnt = 0;
   __res_state *statp = (__res_state*)state;
   for (int i = 0; i < MAXNS && cnt < nfd; i++) {
@@ -367,6 +378,9 @@ int ExtractResolvFDs(void *state, int *fds, int nfd) {
       fds[cnt++] = statp->_u._ext.nssocks[i];
   }
   return cnt;
+#else
+  return 0;
+#endif
 }
 
 // Extract file descriptors passed via UNIX domain sockets.