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bd85f0b3b1
I noticed on Cygwin, gdb.thread/thread-execl.exp would hang, (not that surprising since we can't follow-exec on Cygwin). Looking at the process list running on the machine, we end up with a thread-execl.exe process constantly respawning another process [1]. We see the same constant-reexec if we launch gdb.thread/thread-execl manually on the shell: $ ./testsuite/outputs/gdb.threads/thread-execl/thread-execl # * doesn't exit, constantly re-execing * ^C Prevent this leftover constantly-re-execing scenario by making the testcase program only exec once. We now get: $ ./testsuite/outputs/gdb.threads/thread-execl/thread-execl $ # exits immediately after one exec. On Cygwin, the testcase now fails reasonably quickly, and doesn't leave stale processes behind. Still passes cleanly on x86-64 GNU/Linux. [1] Cygwin's exec emulation spawns a new Windows process for the new image. Approved-By: Andrew Burgess <aburgess@redhat.com> Change-Id: I0de1136cf2ef7e89465189bc43489a2139a80efb
56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2009-2025 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include <pthread.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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static const char *image;
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void *
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thread_execler (void *arg)
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{
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/* Exec ourselves again. Pass an extra argument so that the
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post-exec image knows to not re-exec yet again. */
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if (execl (image, image, "1", NULL) == -1)
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{
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perror ("execl");
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abort ();
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}
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return NULL;
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}
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int
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main (int argc, char **argv)
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{
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pthread_t thread;
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/* An extra argument means we're in the post-exec image, so we're
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done. Don't re-exec again. */
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if (argc > 1)
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exit (0);
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image = argv[0];
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pthread_create (&thread, NULL, thread_execler, NULL);
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pthread_join (thread, NULL);
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return 0;
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}
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