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cosmopolitan/libc/proc
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Justine Tunney dc1afc968b
Fix fork() crash on Windows 
On Windows, sometimes fork() could crash with message likes:

    fork() ViewOrDie(170000) failed with win32 error 487

This is due to a bug in our file descriptor inheritance. We have cursors
which are shared between processes. They let us track the file positions
of read() and write() operations. At startup they were being mmap()ed to
memory addresses that were assigned by WIN32. That's bad because Windows
likes to give us memory addresses beneath the program image in the first
4mb range that are likely to conflict with other assignments. That ended
up causing problems because fork() needs to be able to assume that a map
will be possible to resurrect at the same address. But for one reason or
another, Windows libraries we don't control could sneak allocations into
the memory space that overlap with these mappings. This change solves it
by choosing a random memory address instead when mapping cursor objects.
2024-10-12 15:38:58 -07:00
..
BUILD.mk Reduce code size of mandatory runtime 2024-07-04 02:50:20 -07:00
clock.c Implement proper time zone support 2024-05-04 23:06:37 -07:00
cocmd.c Remove .internal from more header filenames 2024-08-04 12:52:25 -07:00
daemon.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
describefds.c Share file offset across execve() on Windows 2024-08-03 17:48:00 -07:00
describefds.internal.h Share file offset across execve() on Windows 2024-08-03 17:48:00 -07:00
execl.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
execle.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
execlp.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
execv.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
execve-nt.greg.c Freshen bootstrap binaries 2024-09-15 20:37:32 -07:00
execve-sysv.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
execve.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
execve.internal.h Add dontthrow attribute to most libc functions 2024-01-09 01:26:03 -08:00
execvp.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
execvpe.c Delete ASAN 2024-06-22 05:45:49 -07:00
fexecve.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
fork-nt.c Fix fork() crash on Windows 2024-10-12 15:38:58 -07:00
fork-sysv.c Introduce FreeBSD ARM64 support 2023-12-29 20:14:02 -08:00
fork.c Fix issues with previous commit 2024-09-10 01:59:46 -07:00
getpriority-nt.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
getpriority.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
getrusage-nt.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
getrusage-sysv.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
getrusage.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
handle.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
kill-nt.c Put more thought into new signaling code 2024-09-19 20:21:33 -07:00
kill.c Put more thought into new signaling code 2024-09-19 20:21:33 -07:00
killpg.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
nice.c Remove .internal from more header filenames 2024-08-04 12:52:25 -07:00
ntspawn.h Support shebang on Windows 2024-05-20 22:11:42 -07:00
posix_spawn.c Tune posix_spawn() successful fix 2024-10-11 07:10:43 -07:00
posix_spawn.h Fix handling of paths with dirfd on Windows 2024-09-01 17:52:30 -07:00
posix_spawn.internal.h Reduce header complexity 2023-11-28 14:39:42 -08:00
posix_spawn_add_file_action.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
posix_spawn_file_actions_addchdir_np.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
posix_spawn_file_actions_addclose.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
posix_spawn_file_actions_adddup2.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
posix_spawn_file_actions_addfchdir_np.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
posix_spawn_file_actions_addopen.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
posix_spawn_file_actions_destroy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawn_file_actions_init.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_destroy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_getflags.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_getpgroup.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_getrlimit.c Fix handling of paths with dirfd on Windows 2024-09-01 17:52:30 -07:00
posix_spawnattr_getschedparam.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_getschedpolicy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_getsigdefault.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_getsigmask.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_init.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_setflags.c Fix handling of paths with dirfd on Windows 2024-09-01 17:52:30 -07:00
posix_spawnattr_setpgroup.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_setrlimit.c Fix handling of paths with dirfd on Windows 2024-09-01 17:52:30 -07:00
posix_spawnattr_setschedparam.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_setschedpolicy.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_setsigdefault.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnattr_setsigmask.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
posix_spawnp.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
proc.c Further optimize poll() on Windows 2024-09-22 22:28:59 -07:00
proc.internal.h Improve lock hierarchy 2024-07-24 16:05:48 -07:00
sched_getaffinity.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
sched_setaffinity.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
setpriority-nt.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
setpriority.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
system.c Apply clang-format update to repo (#1154) 2024-04-25 10:38:00 -07:00
systemvpe.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
times.c Implement proper time zone support 2024-05-04 23:06:37 -07:00
verynice.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
vfork.S Remove .internal from more header filenames 2024-08-04 12:52:25 -07:00
wait.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
wait3.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
wait4-nt.c Write more tests for signal handling 2024-09-21 05:24:56 -07:00
wait4-sysv.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00
wait4.c Get rid of .internal.h convention in LIBC_INTRIN 2024-07-19 19:38:00 -07:00
waitpid.c flip et / noet in modelines 2023-12-07 22:17:11 -05:00