From 09963bf33adac9d59cd1ef15592c5db125b841eb Mon Sep 17 00:00:00 2001
From: Roland Winklmeier <Roland.M.Winklmeier@gmail.com>
Date: Tue, 27 Dec 2016 03:09:23 +0100
Subject: [PATCH] Call SymInitialize only once and SymCleanup at app exit

In order to refresh the modules, call SymRefreshModuleList regularly

refs #845
---
 src/blackmisc/stacktrace.cpp | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/src/blackmisc/stacktrace.cpp b/src/blackmisc/stacktrace.cpp
index b989e1df0..1f6c80f9b 100644
--- a/src/blackmisc/stacktrace.cpp
+++ b/src/blackmisc/stacktrace.cpp
@@ -15,6 +15,8 @@
 #include <QStringBuilder>
 #include <QMutexLocker>
 #include <array>
+#include <cstdlib>
+#include <mutex>
 
 #if defined(Q_CC_MSVC)
 #   include <windows.h>
@@ -47,8 +49,15 @@ namespace BlackMisc
         static QMutex mutex;
         QMutexLocker lock(&mutex);
 
+        static std::once_flag flag;
+        std::call_once(flag, []
+        {
+            SymInitialize(GetCurrentProcess(), nullptr, true);
+            std::atexit([] { SymCleanup(GetCurrentProcess()); });
+        });
+
         auto process = GetCurrentProcess();
-        SymInitialize(process, nullptr, true);
+        SymRefreshModuleList(process);
 
         std::array<void*, 100> stack;
         auto frames = CaptureStackBackTrace(1, static_cast<DWORD>(stack.size()), stack.data(), nullptr);