[tsan] Use REAL(malloc) instead of __libc_malloc for Android.

Summary:
Android doesn't have __libc_malloc and related allocation
functions. As its dynamic linker doesn't use malloc, so
we can use REAL(malloc) to replace __libc_malloc safely.

Reviewers: kcc, eugenis, dvyukov

Subscribers: llvm-commits, tberghammer, danalbert, srhines

Differential Revision: http://reviews.llvm.org/D15297

llvm-svn: 255167

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

@@ -48,6 +48,13 @@ using namespace __tsan;  // NOLINT
 #define __libc_realloc REAL(realloc)
 #define __libc_calloc REAL(calloc)
 #define __libc_free REAL(free)
+#elif SANITIZER_ANDROID
+#define __errno_location __errno
+#define __libc_malloc REAL(malloc)
+#define __libc_realloc REAL(realloc)
+#define __libc_calloc REAL(calloc)
+#define __libc_free REAL(free)
+#define mallopt(a, b)
 #endif
 
 #if SANITIZER_LINUX || SANITIZER_FREEBSD
@@ -105,10 +112,12 @@ extern "C" void *pthread_self();
 extern "C" void _exit(int status);
 extern "C" int *__errno_location();
 extern "C" int fileno_unlocked(void *stream);
+#if !SANITIZER_ANDROID
 extern "C" void *__libc_calloc(uptr size, uptr n);
 extern "C" void *__libc_realloc(void *ptr, uptr size);
+#endif
 extern "C" int dirfd(void *dirp);
-#if !SANITIZER_FREEBSD
+#if !SANITIZER_FREEBSD && !SANITIZER_ANDROID
 extern "C" int mallopt(int param, int value);
 #endif
 extern __sanitizer_FILE *stdout, *stderr;

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

@@ -23,7 +23,7 @@ struct nothrow_t {};
 
 DECLARE_REAL(void *, malloc, uptr size)
 DECLARE_REAL(void, free, void *ptr)
-#if SANITIZER_MAC
+#if SANITIZER_MAC || SANITIZER_ANDROID
 #define __libc_malloc REAL(malloc)
 #define __libc_free REAL(free)
 #endif