1 /* This testcase is part of GDB, the GNU debugger. 2 3 Copyright 2014-2023 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 <pthread.h> 19 #include <unistd.h> 20 #include <stdlib.h> 21 #include <signal.h> 22 23 #define NUM_THREADS 10 24 const int num_threads = NUM_THREADS; 25 /* Allow for as much timeout as DejaGnu wants, plus a bit of 26 slack. */ 27 28 volatile unsigned int timeout = TIMEOUT; 29 #define SECONDS (timeout + 20) 30 31 pthread_t child_thread[NUM_THREADS]; 32 volatile pthread_t signal_thread; 33 volatile int got_sig; 34 35 void 36 handler (int signo) 37 { 38 got_sig = 1; 39 } 40 41 void 42 loop_broke (void) 43 { 44 } 45 46 #define INF_LOOP \ 47 do \ 48 { \ 49 while (!got_sig) \ 50 ; \ 51 } \ 52 while (0) 53 54 void * 55 child_function (void *arg) 56 { 57 pthread_t self = pthread_self (); 58 59 while (1) 60 { 61 /* Reset the timer before going to INF_LOOP. */ 62 alarm (SECONDS); 63 INF_LOOP; /* set thread breakpoint here */ 64 loop_broke (); 65 } 66 } 67 68 int 69 main (void) 70 { 71 int res; 72 int i; 73 74 /* Call these early so that we're sure their PLTs are quickly 75 resolved now, instead of in the busy threads. */ 76 pthread_kill (pthread_self (), 0); 77 alarm (0); 78 79 signal (SIGUSR1, handler); 80 81 for (i = 0; i < NUM_THREADS; i++) 82 { 83 res = pthread_create (&child_thread[i], NULL, child_function, NULL); 84 } 85 86 while (1) 87 { 88 pthread_kill (signal_thread, SIGUSR1); /* set kill breakpoint here */ 89 /* Reset the timer before going to INF_LOOP. */ 90 alarm (SECONDS); 91 INF_LOOP; 92 loop_broke (); 93 } 94 95 exit(EXIT_SUCCESS); 96 } 97