/thirdparty/breakpad/client/mac/tests/spawn_child_process.h

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 28// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 29
 30// Utility functions for spawning a helper process using a different
 31// CPU architecture.
 32
 33#ifndef GOOGLE_BREAKPAD_CLIENT_MAC_TESTS_SPAWN_CHILD_PROCESS
 34#define GOOGLE_BREAKPAD_CLIENT_MAC_TESTS_SPAWN_CHILD_PROCESS
 35
 36#include <AvailabilityMacros.h>
 37#ifndef MAC_OS_X_VERSION_10_6
 38#define MAC_OS_X_VERSION_10_6 1060
 39#endif
 40#include <crt_externs.h>
 41#include <mach-o/dyld.h>
 42#if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_6
 43#include <spawn.h>
 44#endif
 45
 46#include <string>
 47#include <vector>
 48
 49#include "google_breakpad/common/minidump_format.h"
 50
 51namespace google_breakpad_test {
 52
 53using std::string;
 54using std::vector;
 55
 56const MDCPUArchitecture kNativeArchitecture =
 57#if defined(__i386__)
 58  MD_CPU_ARCHITECTURE_X86
 59#elif defined(__x86_64__)
 60  MD_CPU_ARCHITECTURE_AMD64
 61#elif defined(__ppc__) || defined(__ppc64__)
 62  MD_CPU_ARCHITECTURE_PPC
 63#else
 64#error "This file has not been ported to this CPU architecture."
 65#endif
 66  ;
 67
 68const u_int32_t kNativeContext =
 69#if defined(__i386__)
 70  MD_CONTEXT_X86
 71#elif defined(__x86_64__)
 72  MD_CONTEXT_AMD64
 73#elif defined(__ppc__) || defined(__ppc64__)
 74  MD_CONTEXT_PPC
 75#else
 76#error "This file has not been ported to this CPU architecture."
 77#endif
 78  ;
 79
 80string GetExecutablePath() {
 81  char self_path[PATH_MAX];
 82  uint32_t size = sizeof(self_path);
 83  if (_NSGetExecutablePath(self_path, &size) != 0)
 84    return "";
 85  return self_path;
 86}
 87
 88string GetHelperPath() {
 89  string helper_path(GetExecutablePath());
 90  size_t pos = helper_path.rfind('/');
 91  if (pos == string::npos)
 92    return "";
 93
 94  helper_path.erase(pos + 1);
 95  helper_path += "minidump_generator_test_helper";
 96  return helper_path;
 97}
 98
 99#if MAC_OS_X_VERSION_MIN_REQUIRED >= MAC_OS_X_VERSION_10_6
100
101pid_t spawn_child_process(const char** argv) {
102  posix_spawnattr_t spawnattr;
103  if (posix_spawnattr_init(&spawnattr) != 0)
104    return (pid_t)-1;
105
106  cpu_type_t pref_cpu_types[2] = {
107#if defined(__x86_64__)
108    CPU_TYPE_X86,
109#elif defined(__i386__)
110    CPU_TYPE_X86_64,
111#endif
112    CPU_TYPE_ANY
113  };
114
115  // Set spawn attributes.
116  size_t attr_count = sizeof(pref_cpu_types) / sizeof(pref_cpu_types[0]);
117  size_t attr_ocount = 0;
118  if (posix_spawnattr_setbinpref_np(&spawnattr,
119                                    attr_count,
120                                    pref_cpu_types,
121                                    &attr_ocount) != 0 ||
122      attr_ocount != attr_count) {
123    posix_spawnattr_destroy(&spawnattr);
124    return (pid_t)-1;
125  }
126
127  // Create an argv array.
128  vector<char*> argv_v;
129  while (*argv) {
130    argv_v.push_back(strdup(*argv));
131    argv++;
132  }
133  argv_v.push_back(NULL);
134  pid_t new_pid = 0;
135  int result = posix_spawnp(&new_pid, argv_v[0], NULL, &spawnattr,
136                            &argv_v[0], *_NSGetEnviron());
137  posix_spawnattr_destroy(&spawnattr);
138  
139  for (unsigned i = 0; i < argv_v.size(); i++) {
140    free(argv_v[i]);
141  }
142
143  return result == 0 ? new_pid : -1;
144}
145#endif
146
147}  // namespace google_breakpad_test
148
149#endif  // GOOGLE_BREAKPAD_CLIENT_MAC_TESTS_SPAWN_CHILD_PROCESS