Port linux_syscall_support and linux_dumper to support Linux ARM. Unit tests...

src/client/linux/minidump_writer/linux_dumper_unittest_helper.c

+// Copyright (c) 2010, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// Helper program for the linux_dumper class, which creates a bunch of
+// threads. The first word of each thread's stack is set to the thread
+// id.
+
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/syscall.h>
+#include <unistd.h>
+
+void *thread_function(void *data) {
+  pid_t thread_id = syscall(SYS_gettid);
+  while (true) ;
+}
+
+int main(int argc, char *argv[]) {
+  int num_threads = atoi(argv[1]);
+  if (num_threads < 1) {
+    fprintf(stderr, "ERROR: number of threads is 0");
+    return 1;
+  }
+  pthread_t threads[num_threads];
+  pthread_attr_t thread_attributes;
+  pthread_attr_init(&thread_attributes);
+  pthread_attr_setdetachstate(&thread_attributes, PTHREAD_CREATE_DETACHED);
+  for (int i = 1; i < num_threads; i++) {
+    pthread_create(&threads[i], &thread_attributes, &thread_function, NULL);
+  }
+  thread_function(NULL);
+  return 0;
+}