forked from Imagelibrary/binutils-gdb
7ac958f267
If scheduler-locking is in effect, e.g., with "set scheduler-locking on", and you step over a function that spawns a new thread, the new thread is allowed to run free, at least until some event is hit, at which point, whether the new thread is re-resumed depends on a number of seemingly random factors. E.g., if the target is all-stop, and the parent thread hits a breakpoint, and GDB decides the breakpoint isn't interesting to report to the user, then the parent thread is resumed, but the new thread is left stopped. I think that letting the new threads run with scheduler-locking enabled is a defect. This commit fixes that, making use of the new clone events on Linux, and of target_thread_events() on targets where new threads have no connection to the thread that spawned them. Testcase and documentation changes included. Approved-By: Eli Zaretskii <eliz@gnu.org> Reviewed-By: Andrew Burgess <aburgess@redhat.com> Change-Id: Ie12140138b37534b7fc1d904da34f0f174aa11ce
55 lines
1.5 KiB
C
55 lines
1.5 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2021-2023 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 <assert.h>
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#include <unistd.h>
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static void *
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thread_func (void *arg)
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{
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#if !SCHEDLOCK
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while (1)
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sleep (1);
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#endif
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return NULL;
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}
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int
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main (void)
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{
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pthread_t thread;
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int ret;
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ret = pthread_create (&thread, NULL, thread_func, NULL); /* set break 1 here */
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assert (ret == 0);
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#if SCHEDLOCK
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/* When testing with schedlock enabled, the new thread won't run, so
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we can't join it, as that would hang forever. Instead, sleep for
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a bit, enough that if the spawned thread is scheduled, it hits
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the thread_func breakpoint before the main thread reaches the
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"return 0" line below. */
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sleep (3);
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#else
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pthread_join (thread, NULL);
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#endif
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return 0; /* set break 2 here */
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}
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