1  // Copyright 2010 Google LLC
  2  //
  3  // Redistribution and use in source and binary forms, with or without
  4  // modification, are permitted provided that the following conditions are
  5  // met:
  6  //
  7  //     * Redistributions of source code must retain the above copyright
  8  // notice, this list of conditions and the following disclaimer.
  9  //     * Redistributions in binary form must reproduce the above
 10  // copyright notice, this list of conditions and the following disclaimer
 11  // in the documentation and/or other materials provided with the
 12  // distribution.
 13  //     * Neither the name of Google LLC nor the names of its
 14  // contributors may be used to endorse or promote products derived from
 15  // this software without specific prior written permission.
 16  //
 17  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 18  // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 19  // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 20  // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 21  // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 22  // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 23  // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 24  // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 25  // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 26  // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 27  // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 28  
 29  // Utility functions for spawning a helper process using a different
 30  // CPU architecture.
 31  
 32  #ifndef GOOGLE_BREAKPAD_CLIENT_MAC_TESTS_SPAWN_CHILD_PROCESS
 33  #define GOOGLE_BREAKPAD_CLIENT_MAC_TESTS_SPAWN_CHILD_PROCESS
 34  
 35  #include <AvailabilityMacros.h>
 36  #ifndef MAC_OS_X_VERSION_10_6
 37  #define MAC_OS_X_VERSION_10_6 1060
 38  #endif
 39  #include <crt_externs.h>
 40  #include <mach-o/dyld.h>
 41  #if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_6
 42  #include <spawn.h>
 43  #endif
 44  
 45  #include <string>
 46  #include <vector>
 47  
 48  #include "google_breakpad/common/minidump_format.h"
 49  
 50  namespace google_breakpad_test {
 51  
 52  using std::string;
 53  using std::vector;
 54  
 55  const MDCPUArchitecture kNativeArchitecture =
 56  #if defined(__i386__)
 57    MD_CPU_ARCHITECTURE_X86
 58  #elif defined(__x86_64__)
 59    MD_CPU_ARCHITECTURE_AMD64
 60  #elif defined(__ppc__) || defined(__ppc64__)
 61    MD_CPU_ARCHITECTURE_PPC
 62  #else
 63  #error "This file has not been ported to this CPU architecture."
 64  #endif
 65    ;
 66  
 67  const uint32_t kNativeContext =
 68  #if defined(__i386__)
 69    MD_CONTEXT_X86
 70  #elif defined(__x86_64__)
 71    MD_CONTEXT_AMD64
 72  #elif defined(__ppc__) || defined(__ppc64__)
 73    MD_CONTEXT_PPC
 74  #else
 75  #error "This file has not been ported to this CPU architecture."
 76  #endif
 77    ;
 78  
 79  string GetExecutablePath() {
 80    char self_path[PATH_MAX];
 81    uint32_t size = sizeof(self_path);
 82    if (_NSGetExecutablePath(self_path, &size) != 0)
 83      return "";
 84    return self_path;
 85  }
 86  
 87  string GetHelperPath() {
 88    string helper_path(GetExecutablePath());
 89    size_t pos = helper_path.rfind('/');
 90    if (pos == string::npos)
 91      return "";
 92  
 93    helper_path.erase(pos + 1);
 94    helper_path += "minidump_generator_test_helper";
 95    return helper_path;
 96  }
 97  
 98  #if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_6
 99  
100  pid_t spawn_child_process(const char** argv) {
101    posix_spawnattr_t spawnattr;
102    if (posix_spawnattr_init(&spawnattr) != 0)
103      return (pid_t)-1;
104  
105    cpu_type_t pref_cpu_types[2] = {
106  #if defined(__x86_64__)
107      CPU_TYPE_X86,
108  #elif defined(__i386__)
109      CPU_TYPE_X86_64,
110  #endif
111      CPU_TYPE_ANY
112    };
113  
114    // Set spawn attributes.
115    size_t attr_count = sizeof(pref_cpu_types) / sizeof(pref_cpu_types[0]);
116    size_t attr_ocount = 0;
117    if (posix_spawnattr_setbinpref_np(&spawnattr,
118                                      attr_count,
119                                      pref_cpu_types,
120                                      &attr_ocount) != 0 ||
121        attr_ocount != attr_count) {
122      posix_spawnattr_destroy(&spawnattr);
123      return (pid_t)-1;
124    }
125  
126    // Create an argv array.
127    vector<char*> argv_v;
128    while (*argv) {
129      argv_v.push_back(strdup(*argv));
130      argv++;
131    }
132    argv_v.push_back(NULL);
133    pid_t new_pid = 0;
134    int result = posix_spawnp(&new_pid, argv_v[0], NULL, &spawnattr,
135                              &argv_v[0], *_NSGetEnviron());
136    posix_spawnattr_destroy(&spawnattr);
137    
138    for (unsigned i = 0; i < argv_v.size(); i++) {
139      free(argv_v[i]);
140    }
141  
142    return result == 0 ? new_pid : -1;
143  }
144  #endif
145  
146  }  // namespace google_breakpad_test
147  
148  #endif  // GOOGLE_BREAKPAD_CLIENT_MAC_TESTS_SPAWN_CHILD_PROCESS