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Autotest/Unix: request zero-sized core dumps for crashing code

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Unix systems have got crash loggers in the past 15-20 years, notably
macOS and Linux (abrtd, systemd-coredumpd, etc.). By setting the core
dump limit to zero, those tools should be mostly inhibited from running
and thus not interfere with the parent process' timeouts. Even for
systems without core dump loggers, disabling the writing of a core dump
to the filesystem should also help.

Pick-to: 6.4
Change-Id: I12a088d1ae424825abd3fffd171d112d0671effe
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
This commit is contained in:
Thiago Macieira 2022-10-11 09:38:42 -07:00
parent 673f89d62c
commit c849c48d19
3 changed files with 33 additions and 1 deletions
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16
tests/auto/corelib/io/qprocess/testProcessCrash/main.cpp
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@ -2,6 +2,22 @@
// Copyright (C) 2020 Intel Corporation.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0
#if __has_include(<sys/resource.h>)
# include <sys/resource.h>
# if defined(RLIMIT_CORE)
static bool disableCoreDumps()
{
// Unix: set our core dump limit to zero to request no dialogs.
if (struct rlimit rlim; getrlimit(RLIMIT_CORE, &rlim) == 0) {
rlim.rlim_cur = 0;
setrlimit(RLIMIT_CORE, &rlim);
}
return true;
}
static bool disabledCoreDumps = disableCoreDumps();
# endif // RLIMIT_CORE
#endif // <sys/resource.h>
void crashFallback(volatile int *ptr = nullptr)
{
*ptr = 0;

10
tests/auto/network/socket/qtcpserver/crashingServer/main.cpp
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@ -8,15 +8,23 @@
# include <crtdbg.h>
#endif
#ifdef Q_OS_UNIX
# include <sys/resource.h>
# include <unistd.h>
#endif
int main(int argc, char *argv[])
{
// Windows: Suppress crash notification dialog.
#if defined(Q_OS_WIN) && defined(Q_CC_MSVC)
// Windows: Suppress crash notification dialog.
_CrtSetReportMode(_CRT_ERROR, _CRTDBG_MODE_DEBUG);
#elif defined(RLIMIT_CORE)
// Unix: set our core dump limit to zero to request no dialogs.
if (struct rlimit rlim; getrlimit(RLIMIT_CORE, &rlim) == 0) {
rlim.rlim_cur = 0;
setrlimit(RLIMIT_CORE, &rlim);
}
#endif
QCoreApplication app(argc, argv);
if (argc < 1) {
fprintf(stderr, "Need a port number\n");

8
tests/auto/testlib/selftests/crashes/tst_crashes.cpp
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@ -7,6 +7,8 @@
#ifdef Q_OS_WIN
#include <qt_windows.h>
#else
#include <sys/resource.h>
#endif
class tst_Crashes: public QObject
@ -22,6 +24,12 @@ void tst_Crashes::crash()
#if defined(Q_OS_WIN)
//we avoid the error dialogbox to appear on windows
SetErrorMode( SEM_NOGPFAULTERRORBOX | SEM_FAILCRITICALERRORS | SEM_NOOPENFILEERRORBOX);
#elif defined(RLIMIT_CORE)
// Unix: set our core dump limit to zero to request no dialogs.
if (struct rlimit rlim; getrlimit(RLIMIT_CORE, &rlim) == 0) {
rlim.rlim_cur = 0;
setrlimit(RLIMIT_CORE, &rlim);
}
#endif
/*
We deliberately dereference an invalid but non-zero address;