Use posix version of stack_trace on iOS

base/debug/stack_trace_ios.mm

-// Copyright (c) 2012 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#import <Foundation/Foundation.h>
-#include <mach/task.h>
-#include <stdio.h>
-
-#include "base/logging.h"
-
-// This is just enough of a shim to let the support needed by test_support
-// link.
-
-namespace base {
-namespace debug {
-
-namespace {
-
-void StackDumpSignalHandler(int signal) {
-  // TODO(phajdan.jr): Fix async-signal unsafety.
-  LOG(ERROR) << "Received signal " << signal;
-  NSArray *stack_symbols = [NSThread callStackSymbols];
-  for (NSString* stack_symbol in stack_symbols) {
-    fprintf(stderr, "\t%s\n", [stack_symbol UTF8String]);
-  }
-  _exit(1);
-}
-
-}  // namespace
-
-// TODO(phajdan.jr): Deduplicate, see copy in stack_trace_posix.cc.
-bool EnableInProcessStackDumping() {
-  // When running in an application, our code typically expects SIGPIPE
-  // to be ignored.  Therefore, when testing that same code, it should run
-  // with SIGPIPE ignored as well.
-  struct sigaction action;
-  action.sa_handler = SIG_IGN;
-  action.sa_flags = 0;
-  sigemptyset(&action.sa_mask);
-  bool success = (sigaction(SIGPIPE, &action, NULL) == 0);
-
-  success &= (signal(SIGILL, &StackDumpSignalHandler) != SIG_ERR);
-  success &= (signal(SIGABRT, &StackDumpSignalHandler) != SIG_ERR);
-  success &= (signal(SIGFPE, &StackDumpSignalHandler) != SIG_ERR);
-  success &= (signal(SIGBUS, &StackDumpSignalHandler) != SIG_ERR);
-  success &= (signal(SIGSEGV, &StackDumpSignalHandler) != SIG_ERR);
-  success &= (signal(SIGSYS, &StackDumpSignalHandler) != SIG_ERR);
-
-  return success;
-}
-
-}  // namespace debug
-}  // namespace base