From 10f254b234c7c13c0e528f574d075d88b3d72135 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Tor=20Arne=20Vestb=C3=B8?= <tor.arne.vestbo@qt.io>
Date: Fri, 20 Jul 2018 14:44:53 +0200
Subject: testlib: Allow pausing the process on crash
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Makes it easier to run a test repeatedly until it crashes, and then
attach a debugger.

Change-Id: I8ad5d706becd77a2743a51927c837f3d1da08624
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
---
 src/testlib/qtestcase.cpp | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/src/testlib/qtestcase.cpp b/src/testlib/qtestcase.cpp
index c1b4577157..d9fbfcffa8 100644
--- a/src/testlib/qtestcase.cpp
+++ b/src/testlib/qtestcase.cpp
@@ -87,7 +87,6 @@
 
 #if defined(Q_OS_LINUX)
 #include <sys/types.h>
-#include <unistd.h>
 #include <fcntl.h>
 #endif
 
@@ -101,6 +100,7 @@
 #include <errno.h>
 #include <signal.h>
 #include <time.h>
+#include <unistd.h>
 # if !defined(Q_OS_INTEGRITY)
 #  include <sys/resource.h>
 # endif
@@ -1472,8 +1472,13 @@ void FatalSignalHandler::signal(int signum)
 {
     const int msecsFunctionTime = qRound(QTestLog::msecsFunctionTime());
     const int msecsTotalTime = qRound(QTestLog::msecsTotalTime());
-    if (signum != SIGINT)
+    if (signum != SIGINT) {
         stackTrace();
+        if (qEnvironmentVariableIsSet("QTEST_PAUSE_ON_CRASH")) {
+            fprintf(stderr, "Pausing process %d for debugging\n", getpid());
+            raise(SIGSTOP);
+        }
+    }
     qFatal("Received signal %d\n"
            "         Function time: %dms Total time: %dms",
            signum, msecsFunctionTime, msecsTotalTime);
-- 
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