From d53abf834c4fde7a904b9cb7b1913ee38c768f21 Mon Sep 17 00:00:00 2001
From: Dmitry Vyukov <dvyukov@google.com>
Date: Tue, 26 Oct 2021 15:01:09 +0200
Subject: [PATCH] sanitizer_common: fix deadlock detector output

Print PC of the previous lock, not the current one.
The current one will be printed during unwind.

Reviewed By: melver

Differential Revision: https://reviews.llvm.org/D112533
---
 compiler-rt/lib/sanitizer_common/sanitizer_mutex.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler-rt/lib/sanitizer_common/sanitizer_mutex.cpp b/compiler-rt/lib/sanitizer_common/sanitizer_mutex.cpp
index 1c177d8e7cca..40fe56661250 100644
--- a/compiler-rt/lib/sanitizer_common/sanitizer_mutex.cpp
+++ b/compiler-rt/lib/sanitizer_common/sanitizer_mutex.cpp
@@ -174,7 +174,7 @@ struct InternalDeadlockDetector {
     if (max_idx != MutexInvalid && !mutex_can_lock[max_idx][type]) {
       Printf("%s: internal deadlock: can't lock %s under %s mutex\n", SanitizerToolName,
              mutex_meta[type].name, mutex_meta[max_idx].name);
-      PrintMutexPC(pc);
+      PrintMutexPC(locked[max_idx].pc);
       CHECK(0);
     }
     locked[type].seq = ++sequence;