From 19a490a82d4e82c50ab18fd8d5ac328eecdcac00 Mon Sep 17 00:00:00 2001
From: Tillmann Karras <tilkax@gmail.com>
Date: Sat, 10 Oct 2015 16:42:53 +0200
Subject: [PATCH] Linux: detect perf and default map dir to /tmp

This obviously only works when Dolphin is run by perf rather than being
started separately.
---
 Source/Core/Common/JitRegister.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Source/Core/Common/JitRegister.cpp b/Source/Core/Common/JitRegister.cpp
index 33dbcb52f9..4b8fd0b619 100644
--- a/Source/Core/Common/JitRegister.cpp
+++ b/Source/Core/Common/JitRegister.cpp
@@ -5,6 +5,7 @@
 #include <cinttypes>
 #include <cstddef>
 #include <cstdio>
+#include <cstdlib>
 #include <fstream>
 #include <string>
 
@@ -43,9 +44,10 @@ void Init(const std::string& perf_dir)
 	s_agent = op_open_agent();
 #endif
 
-	if (!perf_dir.empty())
+	if (!perf_dir.empty() || getenv("PERF_BUILDID_DIR"))
 	{
-		std::string filename = StringFromFormat("%s/perf-%d.map", perf_dir.data(), getpid());
+		std::string dir = perf_dir.empty() ? "/tmp" : perf_dir;
+		std::string filename = StringFromFormat("%s/perf-%d.map", dir.data(), getpid());
 		s_perf_map_file.Open(filename, "w");
 		// Disable buffering in order to avoid missing some mappings
 		// if the event of a crash: