Index: lib/tsan/rtl/tsan_rtl_report.cc
===================================================================
--- lib/tsan/rtl/tsan_rtl_report.cc
+++ lib/tsan/rtl/tsan_rtl_report.cc
@@ -25,6 +25,7 @@
 #include "tsan_mman.h"
 #include "tsan_flags.h"
 #include "tsan_fd.h"
+#include "llvm/Support/Compiler.h"
 
 namespace __tsan {
 
@@ -680,6 +681,12 @@
   PrintStack(SymbolizeStack(trace));
 }
 
+// Always inlining PrintCurrentStackSlow, because LocatePcInTrace assumes
+// __sanitizer_print_stack_trace exists in the actual unwinded stack, but
+// tail-call to PrintCurrentStackSlow breaks this assumption because
+// __sanitizer_print_stack_trace disappears after tail-call.
+// See PR27280 comment 1~3 for examples.
+LLVM_ATTRIBUTE_ALWAYS_INLINE
 void PrintCurrentStackSlow(uptr pc) {
 #ifndef SANITIZER_GO
   BufferedStackTrace *ptrace =