87 lines
2.4 KiB
C
87 lines
2.4 KiB
C
/* This testcase is part of GDB, the GNU debugger.
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Copyright 2002-2017 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 <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <pthread.h>
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void *thread_function(void *arg); /* Pointer to function executed by each thread */
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#define NUM 1
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unsigned int args[NUM+1];
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int main() {
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int res;
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pthread_t threads[NUM];
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void *thread_result;
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long i;
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for (i = 1; i <= NUM; i++)
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{
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args[i] = 1;
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res = pthread_create(&threads[i - 1],
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NULL,
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thread_function,
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(void *) i);
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}
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/* schedlock.exp: last thread start. */
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args[0] = 1;
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thread_function ((void *) 0);
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exit(EXIT_SUCCESS);
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}
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void some_function (void) {
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/* Sleep a bit to give the other threads a chance to run, if not
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locked. This also ensure that even if the compiler optimizes out
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or inlines some_function, there's still be some function that
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needs to be stepped over. */
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usleep (1);
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}
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/* When testing "next", this is set to have the loop call
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some_function, which GDB should step over. When testing "step",
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that would step into the function, which is not what we want. */
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volatile int call_function = 0;
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/* Call some_function if CALL_FUNCTION is set. This is wrapped in a
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macro so that it's a single source line in the main loop. */
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#define MAYBE_CALL_SOME_FUNCTION() \
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do \
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{ \
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if (call_function) \
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some_function (); \
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} while (0)
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void *thread_function(void *arg) {
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int my_number = (long) arg;
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int *myp = (int *) &args[my_number];
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/* Don't run forever. Run just short of it :) */
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while (*myp > 0)
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{
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/* schedlock.exp: main loop. */
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MAYBE_CALL_SOME_FUNCTION(); (*myp) ++;
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}
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pthread_exit(NULL);
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}
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