blob: 8655c3fac91ac9a003fd9c60dffb86add3792491 [file] [log] [blame]
// Copyright 2015 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.
// The entry point for all Mac Chromium processes, including the outer app
// bundle (browser) and helper app (renderer, plugin, and friends).
#include <dlfcn.h>
#include <errno.h>
#include <libgen.h>
#include <mach-o/dyld.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <memory>
#include "chrome/common/chrome_version.h"
#include "sandbox/mac/seatbelt_exec.h" // nogncheck
#endif // defined(HELPER_EXECUTABLE)
extern "C" {
// abort_report_np() records the message in a special section that both the
// system CrashReporter and Crashpad collect in crash reports. Using a Crashpad
// Annotation would be preferable, but this executable cannot depend on
// Crashpad directly.
void abort_report_np(const char* fmt, ...);
namespace {
typedef int (*ChromeMainPtr)(int, char**);
[[noreturn]] void FatalError(const char* format, ...) {
va_list valist;
va_start(valist, format);
char message[4096];
if (vsnprintf(message, sizeof(message), format, valist) >= 0) {
fputs(message, stderr);
abort_report_np("%s", message);
} // namespace
__attribute__((visibility("default"))) int main(int argc, char* argv[]) {
uint32_t exec_path_size = 0;
int rv = _NSGetExecutablePath(NULL, &exec_path_size);
if (rv != -1) {
FatalError("_NSGetExecutablePath: get length failed.");
std::unique_ptr<char[]> exec_path(new char[exec_path_size]);
rv = _NSGetExecutablePath(exec_path.get(), &exec_path_size);
if (rv != 0) {
FatalError("_NSGetExecutablePath: get path failed.");
sandbox::SeatbeltExecServer::CreateFromArgumentsResult seatbelt =
sandbox::SeatbeltExecServer::CreateFromArguments(exec_path.get(), argc,
if (seatbelt.sandbox_required) {
if (!seatbelt.server) {
FatalError("Failed to create seatbelt sandbox server.");
if (!seatbelt.server->InitializeSandbox()) {
FatalError("Failed to initialize sandbox.");
// The helper lives within the versioned framework directory, so simply
// go up to find the main dylib.
const char rel_path[] = "../../../../" PRODUCT_FULLNAME_STRING " Framework";
const char rel_path[] = "../Frameworks/" PRODUCT_FULLNAME_STRING
" Framework.framework/Versions/" CHROME_VERSION_STRING
#endif // defined(HELPER_EXECUTABLE)
// Slice off the last part of the main executable path, and append the
// version framework information.
const char* parent_dir = dirname(exec_path.get());
if (!parent_dir) {
FatalError("dirname %s: %s.", exec_path.get(), strerror(errno));
const size_t parent_dir_len = strlen(parent_dir);
const size_t rel_path_len = strlen(rel_path);
// 2 accounts for a trailing NUL byte and the '/' in the middle of the paths.
const size_t framework_path_size = parent_dir_len + rel_path_len + 2;
std::unique_ptr<char[]> framework_path(new char[framework_path_size]);
snprintf(framework_path.get(), framework_path_size, "%s/%s", parent_dir,
void* library =
dlopen(framework_path.get(), RTLD_LAZY | RTLD_LOCAL | RTLD_FIRST);
if (!library) {
FatalError("dlopen %s: %s.", framework_path.get(), dlerror());
const ChromeMainPtr chrome_main =
reinterpret_cast<ChromeMainPtr>(dlsym(library, "ChromeMain"));
if (!chrome_main) {
FatalError("dlsym ChromeMain: %s.", dlerror());
rv = chrome_main(argc, argv);
// exit, don't return from main, to avoid the apparent removal of main from
// stack backtraces under tail call optimization.