| /* This testcase is part of GDB, the GNU debugger. |
| |
| Copyright 2002-2018 Free Software Foundation, Inc. |
| |
| This program is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 3 of the License, or |
| (at your option) any later version. |
| |
| This program is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| GNU General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
| |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <stdlib.h> |
| #include <pthread.h> |
| |
| void *thread_function(void *arg); /* Pointer to function executed by each thread */ |
| |
| #define NUM 1 |
| |
| unsigned int args[NUM+1]; |
| |
| int main() { |
| int res; |
| pthread_t threads[NUM]; |
| void *thread_result; |
| long i; |
| |
| for (i = 1; i <= NUM; i++) |
| { |
| args[i] = 1; |
| res = pthread_create(&threads[i - 1], |
| NULL, |
| thread_function, |
| (void *) i); |
| } |
| |
| /* schedlock.exp: last thread start. */ |
| args[0] = 1; |
| thread_function ((void *) 0); |
| |
| exit(EXIT_SUCCESS); |
| } |
| |
| void some_function (void) { |
| /* Sleep a bit to give the other threads a chance to run, if not |
| locked. This also ensure that even if the compiler optimizes out |
| or inlines some_function, there's still be some function that |
| needs to be stepped over. */ |
| usleep (1); |
| } |
| |
| /* When testing "next", this is set to have the loop call |
| some_function, which GDB should step over. When testing "step", |
| that would step into the function, which is not what we want. */ |
| volatile int call_function = 0; |
| |
| /* Call some_function if CALL_FUNCTION is set. This is wrapped in a |
| macro so that it's a single source line in the main loop. */ |
| #define MAYBE_CALL_SOME_FUNCTION() \ |
| do \ |
| { \ |
| if (call_function) \ |
| some_function (); \ |
| } while (0) |
| |
| void *thread_function(void *arg) { |
| int my_number = (long) arg; |
| int *myp = (int *) &args[my_number]; |
| |
| /* Don't run forever. Run just short of it :) */ |
| while (*myp > 0) |
| { |
| /* schedlock.exp: main loop. */ |
| MAYBE_CALL_SOME_FUNCTION(); (*myp) ++; |
| } |
| |
| pthread_exit(NULL); |
| } |
| |