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https://github.com/Zenithsiz/ftmemsim-valgrind.git
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bad05e6223
VG_USERREQ__DRD_GET_VALGRIND_THREAD_ID. - Added a new client request, namely VG_USERREQ__DRD_GET_DRD_THREAD_ID. - Merged the header file priv_drd_clientreq.h into drd_clientreq.h. - Removed #include "../drd.h" from the regression tests that do not perform client requests. git-svn-id: svn://svn.valgrind.org/valgrind/trunk@8324
130 lines
3.1 KiB
C
130 lines
3.1 KiB
C
/*
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This file is part of drd, a data race detector.
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Copyright (C) 2006-2008 Bart Van Assche
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bart.vanassche@gmail.com
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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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, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307, USA.
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The GNU General Public License is contained in the file COPYING.
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*/
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// Use a semaphore to implement mutual exclusion.
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#include <assert.h>
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#include <stdio.h> // printf()
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#include <pthread.h>
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#include <semaphore.h>
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#include <unistd.h> // usleep()
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// Local functions declarations.
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static void* thread_func(void*);
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// Local variables.
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// s_sem protects s_d3.
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static sem_t s_sem;
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static double s_d1; // accessed before thread creation and in the created
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// thread (not a race).
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static double s_d2; // accessed in the created thread and after the join
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// (not a race).
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static double s_d3; // accessed simultaneously from both threads (race).
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static int s_debug = 0;
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static int s_do_printf = 0;
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static int s_do_mutual_exclusion = 0;
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// Function definitions.
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int main(int argc, char** argv)
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{
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int optchar;
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pthread_t threadid;
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while ((optchar = getopt(argc, argv, "dmp")) != EOF)
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{
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switch (optchar)
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{
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case 'd':
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s_debug = 1;
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break;
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case 'm':
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s_do_mutual_exclusion = 1;
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break;
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case 'p':
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s_do_printf = 1;
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break;
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default:
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assert(0);
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}
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}
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sem_init(&s_sem, 0, 1);
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// Switch to line-buffered mode, such that timing information can be
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// obtained for each printf() call with strace.
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setlinebuf(stdout);
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if (s_debug)
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{
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printf("&s_d1 = %p; &s_d2 = %p; &s_d3 = %p\n", &s_d1, &s_d2, &s_d3);
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}
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s_d1 = 1;
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s_d3 = 3;
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pthread_create(&threadid, 0, thread_func, 0);
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// Wait until the printf() in the created thread finished.
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{
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if (s_do_mutual_exclusion) sem_wait(&s_sem);
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s_d3++;
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if (s_do_mutual_exclusion) sem_post(&s_sem);
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}
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// Wait until the thread finished.
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//printf("Before call to pthread_join()\n");
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//fflush(stdout);
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pthread_join(threadid, 0);
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//printf("After call to pthread_join()\n");
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//fflush(stdout);
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if (s_do_printf) printf("s_d2 = %g (should be 2)\n", s_d2);
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if (s_do_printf) printf("s_d3 = %g (should be 5)\n", s_d3);
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sem_destroy(&s_sem);
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return 0;
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}
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static void* thread_func(void* thread_arg)
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{
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if (s_do_printf)
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{
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printf("s_d1 = %g (should be 1)\n", s_d1);
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}
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s_d2 = 2;
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{
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if (s_do_mutual_exclusion) sem_wait(&s_sem);
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s_d3++;
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if (s_do_mutual_exclusion) sem_post(&s_sem);
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}
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return 0;
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}
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