1 /* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2002-2023 Free Software Foundation, Inc. 4 5 This program is free software; you can redistribute it and/or modify 6 it under the terms of the GNU General Public License as published by 7 the Free Software Foundation; either version 3 of the License, or 8 (at your option) any later version. 9 10 This program is distributed in the hope that it will be useful, 11 but WITHOUT ANY WARRANTY; without even the implied warranty of 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 GNU General Public License for more details. 14 15 You should have received a copy of the GNU General Public License 16 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 17 18 #include <stdio.h> 19 #include <unistd.h> 20 #include <stdlib.h> 21 #include <pthread.h> 22 23 void *thread_function(void *arg); /* Pointer to function executed by each thread */ 24 25 #define NUM 1 26 27 unsigned int args[NUM+1]; 28 29 int main() { 30 int res; 31 pthread_t threads[NUM]; 32 void *thread_result; 33 long i; 34 35 for (i = 1; i <= NUM; i++) 36 { 37 args[i] = 1; 38 res = pthread_create(&threads[i - 1], 39 NULL, 40 thread_function, 41 (void *) i); 42 } 43 44 /* schedlock.exp: last thread start. */ 45 args[0] = 1; 46 thread_function ((void *) 0); 47 48 exit(EXIT_SUCCESS); 49 } 50 51 void some_function (void) { 52 /* Sleep a bit to give the other threads a chance to run, if not 53 locked. This also ensure that even if the compiler optimizes out 54 or inlines some_function, there's still be some function that 55 needs to be stepped over. */ 56 usleep (1); 57 } 58 59 /* When testing "next", this is set to have the loop call 60 some_function, which GDB should step over. When testing "step", 61 that would step into the function, which is not what we want. */ 62 volatile int call_function = 0; 63 64 /* Call some_function if CALL_FUNCTION is set. This is wrapped in a 65 macro so that it's a single source line in the main loop. */ 66 #define MAYBE_CALL_SOME_FUNCTION() \ 67 do \ 68 { \ 69 if (call_function) \ 70 some_function (); \ 71 } while (0) 72 73 void *thread_function(void *arg) { 74 int my_number = (long) arg; 75 int *myp = (int *) &args[my_number]; 76 77 /* Don't run forever. Run just short of it :) */ 78 while (*myp > 0) 79 { 80 /* schedlock.exp: main loop. */ 81 MAYBE_CALL_SOME_FUNCTION(); (*myp) ++; 82 } 83 84 pthread_exit(NULL); 85 } 86 87