Home | History | Annotate | Download | only in process
      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "base/process/launch.h"
      6 
      7 #include <mach/mach.h>
      8 #include <servers/bootstrap.h>
      9 
     10 #include "base/logging.h"
     11 
     12 namespace base {
     13 
     14 void RestoreDefaultExceptionHandler() {
     15   // This function is tailored to remove the Breakpad exception handler.
     16   // exception_mask matches s_exception_mask in
     17   // breakpad/src/client/mac/handler/exception_handler.cc
     18   const exception_mask_t exception_mask = EXC_MASK_BAD_ACCESS |
     19                                           EXC_MASK_BAD_INSTRUCTION |
     20                                           EXC_MASK_ARITHMETIC |
     21                                           EXC_MASK_BREAKPOINT;
     22 
     23   // Setting the exception port to MACH_PORT_NULL may not be entirely
     24   // kosher to restore the default exception handler, but in practice,
     25   // it results in the exception port being set to Apple Crash Reporter,
     26   // the desired behavior.
     27   task_set_exception_ports(mach_task_self(), exception_mask, MACH_PORT_NULL,
     28                            EXCEPTION_DEFAULT, THREAD_STATE_NONE);
     29 }
     30 
     31 void ReplaceBootstrapPort(const std::string& new_bootstrap_name) {
     32   // This function is called between fork() and exec(), so it should take care
     33   // to run properly in that situation.
     34 
     35   mach_port_t port = MACH_PORT_NULL;
     36   kern_return_t kr = bootstrap_look_up(bootstrap_port,
     37       new_bootstrap_name.c_str(), &port);
     38   if (kr != KERN_SUCCESS) {
     39     RAW_LOG(FATAL, "Failed to look up replacement bootstrap port.");
     40   }
     41 
     42   kr = task_set_bootstrap_port(mach_task_self(), port);
     43   if (kr != KERN_SUCCESS) {
     44     RAW_LOG(FATAL, "Failed to replace bootstrap port.");
     45   }
     46 }
     47 
     48 }  // namespace base
     49