From 75f05161d7963f9f7cea50e0cafd7f0fb6efd798 Mon Sep 17 00:00:00 2001
From: ulan <ulan@chromium.org>
Date: Wed, 27 Apr 2016 08:08:08 -0700
Subject: [PATCH] Print more debug info on semaphore failure.

BUG=chromium:605349
LOG=NO

Review URL: https://codereview.chromium.org/1921213004

Cr-Commit-Position: refs/heads/master@{#35825}
---
 src/base/platform/semaphore.cc | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/base/platform/semaphore.cc b/src/base/platform/semaphore.cc
index f53df6741f..6225b1655f 100644
--- a/src/base/platform/semaphore.cc
+++ b/src/base/platform/semaphore.cc
@@ -101,7 +101,9 @@ Semaphore::~Semaphore() {
 
 void Semaphore::Signal() {
   int result = sem_post(&native_handle_);
-  CHECK_EQ(0, result);
+  if (result != 0) {
+    V8_Fatal(__FILE__, __LINE__, "Semaphore signal failure: %d\n", errno);
+  }
 }