cfc8628092
r=mwu at http://breakpad.appspot.com/212001/show git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@716 4c0a9323-5329-0410-9bdc-e9ce6186880e
76 lines
2.8 KiB
C++
76 lines
2.8 KiB
C++
// Copyright (c) 2010, Google Inc.
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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// Helper program for the linux_dumper class, which creates a bunch of
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// threads. The first word of each thread's stack is set to the thread
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// id.
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#include <pthread.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/syscall.h>
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#include <unistd.h>
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#include "third_party/lss/linux_syscall_support.h"
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#if defined(__ARM_EABI__)
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#define TID_PTR_REGISTER "r3"
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#elif defined(__i386)
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#define TID_PTR_REGISTER "ecx"
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#elif defined(__x86_64)
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#define TID_PTR_REGISTER "rcx"
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#else
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#error This test has not been ported to this platform.
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#endif
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void *thread_function(void *data) {
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volatile pid_t thread_id = syscall(__NR_gettid);
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register volatile pid_t *thread_id_ptr asm(TID_PTR_REGISTER) = &thread_id;
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while (true)
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asm volatile ("" : : "r" (thread_id_ptr));
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return NULL;
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}
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int main(int argc, char *argv[]) {
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int num_threads = atoi(argv[1]);
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if (num_threads < 1) {
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fprintf(stderr, "ERROR: number of threads is 0");
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return 1;
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}
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pthread_t threads[num_threads];
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pthread_attr_t thread_attributes;
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pthread_attr_init(&thread_attributes);
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pthread_attr_setdetachstate(&thread_attributes, PTHREAD_CREATE_DETACHED);
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for (int i = 1; i < num_threads; i++) {
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pthread_create(&threads[i], &thread_attributes, &thread_function, NULL);
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}
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thread_function(NULL);
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return 0;
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}
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