[asan] Delay syslog use on Android until the end of __asan_init.

Due to a slightly different initialization order, syslog on
android/x86 calls vsnprintf, which can not be handled until interceptors
are initialized at least.

llvm-svn: 246831

1 files changed, 9 insertions, 6 deletions

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cc b/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cc
index 8670fc34fa0..13e790a8972 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cc
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cc
@@ -538,7 +538,8 @@ uptr GetRSS() {
 // Starting with the L release, syslog() works and is preferable to
 // __android_log_write.
 #if SANITIZER_LINUX
-#if SANITIZER_ANDROID && __ANDROID_API__ < 21
+
+#if SANITIZER_ANDROID
 static atomic_uint8_t android_log_initialized;
 
 void AndroidLogInit() {
@@ -548,17 +549,19 @@ void AndroidLogInit() {
 static bool IsSyslogAvailable() {
   return atomic_load(&android_log_initialized, memory_order_acquire);
 }
-
-static void WriteOneLineToSyslog(const char *s) {
-  __android_log_write(ANDROID_LOG_INFO, NULL, s);
-}
 #else
 void AndroidLogInit() {}
 
 static bool IsSyslogAvailable() { return true; }
+#endif  // SANITIZER_ANDROID
 
-static void WriteOneLineToSyslog(const char *s) { syslog(LOG_INFO, "%s", s); }
+static void WriteOneLineToSyslog(const char *s) {
+#if SANITIZER_ANDROID &&__ANDROID_API__ < 21
+  __android_log_write(ANDROID_LOG_INFO, NULL, s);
+#else
+  syslog(LOG_INFO, "%s", s);
 #endif
+}
 
 void WriteToSyslog(const char *buffer) {
   if (!IsSyslogAvailable())