From 6a0d2336133387d48e065f3fe2652017b6ba0d99 Mon Sep 17 00:00:00 2001
From: Bartosz Taudul <wolf@nereid.pl>
Date: Sat, 4 Dec 2021 18:58:17 +0100
Subject: [PATCH] Proper mmap failure detection.

---
 client/TracyRingBuffer.hpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/client/TracyRingBuffer.hpp b/client/TracyRingBuffer.hpp
index cb6248c1..b1d426ae 100644
--- a/client/TracyRingBuffer.hpp
+++ b/client/TracyRingBuffer.hpp
@@ -1,3 +1,5 @@
+#include <errno.h>
+
 namespace tracy
 {
 
@@ -14,8 +16,9 @@ public:
         assert( __builtin_popcount( Size ) == 1 );
         m_mapSize = Size + pageSize;
         auto mapAddr = mmap( nullptr, m_mapSize, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0 );
-        if( !mapAddr )
+        if( mapAddr == MAP_FAILED )
         {
+            TracyDebug( "mmap failed: errno %i (%s)\n", errno, strerror( errno ) );
             m_fd = 0;
             m_metadata = nullptr;
             close( fd );