[sanitizer] Move GetTlsSize code from TSan to sanitizer_common.

llvm-svn: 176938

compiler-rt/lib/sanitizer_common/sanitizer_common.h

@@ -133,6 +133,9 @@ bool StackSizeIsUnlimited();
 void SetStackSizeLimitInBytes(uptr limit);
 void PrepareForSandboxing();
 
+void InitTlsSize();
+uptr GetTlsSize();
+
 // Other
 void SleepForSeconds(int seconds);
 void SleepForMillis(int millis);

compiler-rt/lib/sanitizer_common/sanitizer_linux.cc

@@ -22,6 +22,7 @@
 #include "sanitizer_procmaps.h"
 #include "sanitizer_stacktrace.h"
 
+#include <dlfcn.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <pthread.h>
@@ -673,6 +674,34 @@ bool ThreadLister::GetDirectoryEntries() {
   return true;
 }
 
+static uptr g_tls_size;
+
+#ifdef __i386__
+# define DL_INTERNAL_FUNCTION __attribute__((regparm(3), stdcall))
+#else
+# define DL_INTERNAL_FUNCTION
+#endif
+
+void InitTlsSize() {
+#ifndef SANITIZER_GO
+  typedef void (*get_tls_func)(size_t*, size_t*) DL_INTERNAL_FUNCTION;
+  get_tls_func get_tls;
+  void *get_tls_static_info_ptr = dlsym(RTLD_NEXT, "_dl_get_tls_static_info");
+  CHECK_EQ(sizeof(get_tls), sizeof(get_tls_static_info_ptr));
+  internal_memcpy(&get_tls, &get_tls_static_info_ptr,
+                  sizeof(get_tls_static_info_ptr));
+  CHECK_NE(get_tls, 0);
+  size_t tls_size = 0;
+  size_t tls_align = 0;
+  get_tls(&tls_size, &tls_align);
+  g_tls_size = tls_size;
+#endif
+}
+
+uptr GetTlsSize() {
+  return g_tls_size;
+}
+
 }  // namespace __sanitizer
 
 #endif  // __linux__

compiler-rt/lib/sanitizer_common/sanitizer_mac.cc

@@ -326,6 +326,13 @@ void BlockingMutex::CheckLocked() {
   CHECK_EQ((uptr)pthread_self(), owner_);
 }
 
+uptr GetTlsSize() {
+  return 0;
+}
+
+void InitTlsSize() {
+}
+
 }  // namespace __sanitizer
 
 #endif  // __APPLE__

compiler-rt/lib/sanitizer_common/sanitizer_win.cc

@@ -295,6 +295,13 @@ void BlockingMutex::CheckLocked() {
   CHECK_EQ(owner_, GetThreadSelf());
 }
 
+uptr GetTlsSize() {
+  return 0;
+}
+
+void InitTlsSize() {
+}
+
 }  // namespace __sanitizer
 
 #endif  // _WIN32

compiler-rt/lib/sanitizer_common/tests/CMakeLists.txt

@@ -56,7 +56,7 @@ macro(add_sanitizer_tests_for_arch arch)
                             -I${COMPILER_RT_SOURCE_DIR}/lib
                             -I${COMPILER_RT_SOURCE_DIR}/lib/sanitizer_common
                             -O2 -g -Wall -Werror ${TARGET_FLAGS})
-  set(SANITIZER_TEST_LINK_FLAGS -lstdc++ -lpthread ${TARGET_FLAGS})
+  set(SANITIZER_TEST_LINK_FLAGS -lstdc++ -lpthread -ldl ${TARGET_FLAGS})
   set(SANITIZER_TEST_OBJECTS)
   foreach(source ${SANITIZER_TEST_SOURCES})
     get_filename_component(basename ${source} NAME)

compiler-rt/lib/tsan/rtl/tsan_platform.h

@@ -148,7 +148,6 @@ void internal_start_thread(void(*func)(void*), void *arg);
 // Says whether the addr relates to a global var.
 // Guesses with high probability, may yield both false positives and negatives.
 bool IsGlobalVar(uptr addr);
-uptr GetTlsSize();
 void GetThreadStackAndTls(bool main, uptr *stk_addr, uptr *stk_size,
                           uptr *tls_addr, uptr *tls_size);
 int ExtractResolvFDs(void *state, int *fds, int nfd);

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

@@ -167,27 +167,6 @@ static void InitDataSeg() {
   CHECK_LT((uptr)&g_data_start, g_data_end);
 }
 
-static uptr g_tls_size;
-
-#ifdef __i386__
-# define INTERNAL_FUNCTION __attribute__((regparm(3), stdcall))
-#else
-# define INTERNAL_FUNCTION
-#endif
-
-static int InitTlsSize() {
-  typedef void (*get_tls_func)(size_t*, size_t*) INTERNAL_FUNCTION;
-  get_tls_func get_tls;
-  void *get_tls_static_info_ptr = dlsym(RTLD_NEXT, "_dl_get_tls_static_info");
-  CHECK_EQ(sizeof(get_tls), sizeof(get_tls_static_info_ptr));
-  internal_memcpy(&get_tls, &get_tls_static_info_ptr,
-                  sizeof(get_tls_static_info_ptr));
-  CHECK_NE(get_tls, 0);
-  size_t tls_size = 0;
-  size_t tls_align = 0;
-  get_tls(&tls_size, &tls_align);
-  return tls_size;
-}
 #endif  // #ifndef TSAN_GO
 
 static rlim_t getlim(int res) {
@@ -242,7 +221,7 @@ const char *InitializePlatform() {
 
 #ifndef TSAN_GO
   CheckPIE();
-  g_tls_size = (uptr)InitTlsSize();
+  InitTlsSize();
   InitDataSeg();
 #endif
   return GetEnv(kTsanOptionsEnv);
@@ -252,20 +231,12 @@ void FinalizePlatform() {
   fflush(0);
 }
 
-uptr GetTlsSize() {
-#ifndef TSAN_GO
-  return g_tls_size;
-#else
-  return 0;
-#endif
-}
-
 void GetThreadStackAndTls(bool main, uptr *stk_addr, uptr *stk_size,
                           uptr *tls_addr, uptr *tls_size) {
 #ifndef TSAN_GO
   arch_prctl(ARCH_GET_FS, tls_addr);
-  *tls_addr -= g_tls_size;
-  *tls_size = g_tls_size;
+  *tls_size = GetTlsSize();
+  *tls_addr -= *tls_size;
 
   uptr stack_top, stack_bottom;
   GetThreadStackTopAndBottom(main, &stack_top, &stack_bottom);

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

@@ -89,10 +89,6 @@ void FinalizePlatform() {
   fflush(0);
 }
 
-uptr GetTlsSize() {
-  return 0;
-}
-
 void GetThreadStackAndTls(bool main, uptr *stk_addr, uptr *stk_size,
                           uptr *tls_addr, uptr *tls_size) {
   *stk_addr = 0;

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

@@ -41,10 +41,6 @@ void FinalizePlatform() {
   fflush(0);
 }
 
-uptr GetTlsSize() {
-  return 0;
-}
-
 void GetThreadStackAndTls(bool main, uptr *stk_addr, uptr *stk_size,
                           uptr *tls_addr, uptr *tls_size) {
   *stk_addr = 0;