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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include <dirent.h> | 5 #include <dirent.h> |
6 #include <errno.h> | 6 #include <errno.h> |
7 #include <fcntl.h> | 7 #include <fcntl.h> |
8 #include <signal.h> | 8 #include <signal.h> |
9 #include <stdlib.h> | 9 #include <stdlib.h> |
10 #include <sys/resource.h> | 10 #include <sys/resource.h> |
11 #include <sys/time.h> | 11 #include <sys/time.h> |
12 #include <sys/types.h> | 12 #include <sys/types.h> |
13 #include <sys/wait.h> | 13 #include <sys/wait.h> |
14 #include <unistd.h> | 14 #include <unistd.h> |
15 | 15 |
16 #include <limits> | 16 #include <limits> |
17 #include <set> | 17 #include <set> |
18 | 18 |
19 #include "base/command_line.h" | 19 #include "base/command_line.h" |
20 #include "base/compiler_specific.h" | 20 #include "base/compiler_specific.h" |
21 #include "base/debug_util.h" | 21 #include "base/debug_util.h" |
22 #include "base/dir_reader_posix.h" | 22 #include "base/dir_reader_posix.h" |
23 #include "base/eintr_wrapper.h" | 23 #include "base/eintr_wrapper.h" |
24 #include "base/logging.h" | 24 #include "base/logging.h" |
25 #include "base/platform_thread.h" | 25 #include "base/platform_thread.h" |
26 #include "base/process_util.h" | 26 #include "base/process_util.h" |
27 #include "base/scoped_ptr.h" | 27 #include "base/scoped_ptr.h" |
28 #include "base/string_util.h" | 28 #include "base/stringprintf.h" |
29 #include "base/time.h" | 29 #include "base/time.h" |
30 #include "base/waitable_event.h" | 30 #include "base/waitable_event.h" |
31 | 31 |
32 #if defined(OS_MACOSX) | 32 #if defined(OS_MACOSX) |
33 #include <crt_externs.h> | 33 #include <crt_externs.h> |
34 #define environ (*_NSGetEnviron()) | 34 #define environ (*_NSGetEnviron()) |
35 #include "base/mach_ipc_mac.h" | 35 #include "base/mach_ipc_mac.h" |
36 #include "base/rand_util.h" | 36 #include "base/rand_util.h" |
37 #else | 37 #else |
38 extern char** environ; | 38 extern char** environ; |
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287 // before closing. See https://bugs.kde.org/show_bug.cgi?id=191758 | 287 // before closing. See https://bugs.kde.org/show_bug.cgi?id=191758 |
288 if (fd < static_cast<int>(max_fds)) { | 288 if (fd < static_cast<int>(max_fds)) { |
289 int ret = HANDLE_EINTR(close(fd)); | 289 int ret = HANDLE_EINTR(close(fd)); |
290 DPCHECK(ret == 0); | 290 DPCHECK(ret == 0); |
291 } | 291 } |
292 } | 292 } |
293 } | 293 } |
294 | 294 |
295 #if defined(OS_MACOSX) | 295 #if defined(OS_MACOSX) |
296 static std::string MachErrorCode(kern_return_t err) { | 296 static std::string MachErrorCode(kern_return_t err) { |
297 return StringPrintf("0x%x %s", err, mach_error_string(err)); | 297 return StringPrintf("0x%x %s", err, mach_error_string(err)); |
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base::?
| |
298 } | 298 } |
299 | 299 |
300 // Forks the current process and returns the child's |task_t| in the parent | 300 // Forks the current process and returns the child's |task_t| in the parent |
301 // process. | 301 // process. |
302 static pid_t fork_and_get_task(task_t* child_task) { | 302 static pid_t fork_and_get_task(task_t* child_task) { |
303 const int kTimeoutMs = 100; | 303 const int kTimeoutMs = 100; |
304 kern_return_t err; | 304 kern_return_t err; |
305 | 305 |
306 // Put a random number into the channel name, so that a compromised renderer | 306 // Put a random number into the channel name, so that a compromised renderer |
307 // can't pretend being the child that's forked off. | 307 // can't pretend being the child that's forked off. |
308 std::string mach_connection_name = StringPrintf( | 308 std::string mach_connection_name = StringPrintf( |
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"
| |
309 "com.google.Chrome.samplingfork.%p.%d", | 309 "com.google.Chrome.samplingfork.%p.%d", |
310 child_task, base::RandInt(0, std::numeric_limits<int>::max())); | 310 child_task, base::RandInt(0, std::numeric_limits<int>::max())); |
311 ReceivePort parent_recv_port(mach_connection_name.c_str()); | 311 ReceivePort parent_recv_port(mach_connection_name.c_str()); |
312 | 312 |
313 // Error handling philosophy: If Mach IPC fails, don't touch |child_task| but | 313 // Error handling philosophy: If Mach IPC fails, don't touch |child_task| but |
314 // return a valid pid. If IPC fails in the child, the parent will have to wait | 314 // return a valid pid. If IPC fails in the child, the parent will have to wait |
315 // until kTimeoutMs is over. This is not optimal, but I've never seen it | 315 // until kTimeoutMs is over. This is not optimal, but I've never seen it |
316 // happen, and stuff should still mostly work. | 316 // happen, and stuff should still mostly work. |
317 pid_t pid = fork(); | 317 pid_t pid = fork(); |
318 switch (pid) { | 318 switch (pid) { |
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896 const ProcessFilter* filter) { | 896 const ProcessFilter* filter) { |
897 bool exited_cleanly = | 897 bool exited_cleanly = |
898 WaitForProcessesToExit(executable_name, wait_milliseconds, | 898 WaitForProcessesToExit(executable_name, wait_milliseconds, |
899 filter); | 899 filter); |
900 if (!exited_cleanly) | 900 if (!exited_cleanly) |
901 KillProcesses(executable_name, exit_code, filter); | 901 KillProcesses(executable_name, exit_code, filter); |
902 return exited_cleanly; | 902 return exited_cleanly; |
903 } | 903 } |
904 | 904 |
905 } // namespace base | 905 } // namespace base |
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