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cosmopolitan/libc/calls/sigchld-nt.c

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Polyfill SIGCHLD on the New Technology redbean will now cleanup child processes properly. New accounting information is available too, such as page faults and memory usage. The way it works is Cosmopolitan Libc samples the process collection on entry into read() and poll() to see if SIGCHLD needs to be raised. This change also fixes an issue with chibicc /tmp cleanup. There was also a regression in MODE=dbg because STL needed ASAN runtime support.
2022-03-23 04:04:08 +00:00
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
Make signal handling work well across platforms - Fix sigsuspend() on XNU - Fix strsignal() on non-Linux - Add unit tests for strsignal() - Add unit tests for setitimer() - Add unit tests for sigsuspend() - Rewrite setitimer() for New Technology - Rewrite nanosleep() for New Technology - Polyfill SIGALRM on the New Technology - select(0,0,0,0) on NT now calls pause() - Remove some NTDLL calls that aren't needed - Polyfill SA_NOCLDWAIT on the New Technology - Polyfill SA_RESETHAND on the New Technology - Polyfill sigprocmask() on the New Technology - Polyfill SIGCHLD+SIG_IGN on the New Technology - Polyfill SA_RESTART masking on the New Technology - Deliver console signals from main thread on New Technology - Document SA_RESTART behavior w/ @sarestartable / @norestart - System call trace in MODE=dbg now prints inherited FDs and signal mask
2022-03-25 14:11:44 +00:00
#include "libc/assert.h"
Reduce build graph by another eight percent
2022-08-13 20:11:56 +00:00
#include "libc/calls/calls.h"
Polyfill SIGCHLD on the New Technology redbean will now cleanup child processes properly. New accounting information is available too, such as page faults and memory usage. The way it works is Cosmopolitan Libc samples the process collection on entry into read() and poll() to see if SIGCHLD needs to be raised. This change also fixes an issue with chibicc /tmp cleanup. There was also a regression in MODE=dbg because STL needed ASAN runtime support.
2022-03-23 04:04:08 +00:00
#include "libc/calls/internal.h"
Make signal handling work well across platforms - Fix sigsuspend() on XNU - Fix strsignal() on non-Linux - Add unit tests for strsignal() - Add unit tests for setitimer() - Add unit tests for sigsuspend() - Rewrite setitimer() for New Technology - Rewrite nanosleep() for New Technology - Polyfill SIGALRM on the New Technology - select(0,0,0,0) on NT now calls pause() - Remove some NTDLL calls that aren't needed - Polyfill SA_NOCLDWAIT on the New Technology - Polyfill SA_RESETHAND on the New Technology - Polyfill sigprocmask() on the New Technology - Polyfill SIGCHLD+SIG_IGN on the New Technology - Polyfill SA_RESTART masking on the New Technology - Deliver console signals from main thread on New Technology - Document SA_RESTART behavior w/ @sarestartable / @norestart - System call trace in MODE=dbg now prints inherited FDs and signal mask
2022-03-25 14:11:44 +00:00
#include "libc/calls/sig.internal.h"
Reduce Makefile dependencies by 4%
2022-05-23 22:06:11 +00:00
#include "libc/calls/state.internal.h"
Reduce build graph by another eight percent
2022-08-13 20:11:56 +00:00
#include "libc/calls/struct/siginfo.h"
Reduce Makefile dependencies by 4%
2022-05-23 22:06:11 +00:00
#include "libc/calls/syscall_support-nt.internal.h"
Make signal handling work well across platforms - Fix sigsuspend() on XNU - Fix strsignal() on non-Linux - Add unit tests for strsignal() - Add unit tests for setitimer() - Add unit tests for sigsuspend() - Rewrite setitimer() for New Technology - Rewrite nanosleep() for New Technology - Polyfill SIGALRM on the New Technology - select(0,0,0,0) on NT now calls pause() - Remove some NTDLL calls that aren't needed - Polyfill SA_NOCLDWAIT on the New Technology - Polyfill SA_RESETHAND on the New Technology - Polyfill sigprocmask() on the New Technology - Polyfill SIGCHLD+SIG_IGN on the New Technology - Polyfill SA_RESTART masking on the New Technology - Deliver console signals from main thread on New Technology - Document SA_RESTART behavior w/ @sarestartable / @norestart - System call trace in MODE=dbg now prints inherited FDs and signal mask
2022-03-25 14:11:44 +00:00
#include "libc/dce.h"
Polyfill SIGCHLD on the New Technology redbean will now cleanup child processes properly. New accounting information is available too, such as page faults and memory usage. The way it works is Cosmopolitan Libc samples the process collection on entry into read() and poll() to see if SIGCHLD needs to be raised. This change also fixes an issue with chibicc /tmp cleanup. There was also a regression in MODE=dbg because STL needed ASAN runtime support.
2022-03-23 04:04:08 +00:00
#include "libc/nt/enum/wait.h"
#include "libc/nt/runtime.h"
#include "libc/nt/synchronization.h"
Make signal handling work well across platforms - Fix sigsuspend() on XNU - Fix strsignal() on non-Linux - Add unit tests for strsignal() - Add unit tests for setitimer() - Add unit tests for sigsuspend() - Rewrite setitimer() for New Technology - Rewrite nanosleep() for New Technology - Polyfill SIGALRM on the New Technology - select(0,0,0,0) on NT now calls pause() - Remove some NTDLL calls that aren't needed - Polyfill SA_NOCLDWAIT on the New Technology - Polyfill SA_RESETHAND on the New Technology - Polyfill sigprocmask() on the New Technology - Polyfill SIGCHLD+SIG_IGN on the New Technology - Polyfill SA_RESTART masking on the New Technology - Deliver console signals from main thread on New Technology - Document SA_RESTART behavior w/ @sarestartable / @norestart - System call trace in MODE=dbg now prints inherited FDs and signal mask
2022-03-25 14:11:44 +00:00
#include "libc/sysv/consts/sa.h"
Polyfill SIGCHLD on the New Technology redbean will now cleanup child processes properly. New accounting information is available too, such as page faults and memory usage. The way it works is Cosmopolitan Libc samples the process collection on entry into read() and poll() to see if SIGCHLD needs to be raised. This change also fixes an issue with chibicc /tmp cleanup. There was also a regression in MODE=dbg because STL needed ASAN runtime support.
2022-03-23 04:04:08 +00:00
#include "libc/sysv/consts/sicode.h"
#include "libc/sysv/consts/sig.h"
Get LIBC_RUNTIME and LIBC_CALLS building on aarch64
2023-05-09 08:56:56 +00:00
#ifdef __x86_64__
Make forking off threads reliable on Windows This change makes posix_spawn_test no longer flaky on Windows, by (1) fixing a race condition in wait(), and (2) removing a misguided vfork implementation which was letting Windows bypass pthread_atfork().
2023-07-30 15:55:01 +00:00
static textwindows bool CheckForExitedChildProcess(void) {
Polyfill SIGCHLD on the New Technology redbean will now cleanup child processes properly. New accounting information is available too, such as page faults and memory usage. The way it works is Cosmopolitan Libc samples the process collection on entry into read() and poll() to see if SIGCHLD needs to be raised. This change also fixes an issue with chibicc /tmp cleanup. There was also a regression in MODE=dbg because STL needed ASAN runtime support.
2022-03-23 04:04:08 +00:00
int pids[64];
uint32_t i, n;
int64_t handles[64];
Make forking off threads reliable on Windows This change makes posix_spawn_test no longer flaky on Windows, by (1) fixing a race condition in wait(), and (2) removing a misguided vfork implementation which was letting Windows bypass pthread_atfork().
2023-07-30 15:55:01 +00:00
if (!(n = __sample_pids(pids, handles, true))) return false;
Polyfill SIGCHLD on the New Technology redbean will now cleanup child processes properly. New accounting information is available too, such as page faults and memory usage. The way it works is Cosmopolitan Libc samples the process collection on entry into read() and poll() to see if SIGCHLD needs to be raised. This change also fixes an issue with chibicc /tmp cleanup. There was also a regression in MODE=dbg because STL needed ASAN runtime support.
2022-03-23 04:04:08 +00:00
i = WaitForMultipleObjects(n, handles, false, 0);
Make forking off threads reliable on Windows This change makes posix_spawn_test no longer flaky on Windows, by (1) fixing a race condition in wait(), and (2) removing a misguided vfork implementation which was letting Windows bypass pthread_atfork().
2023-07-30 15:55:01 +00:00
if (i == kNtWaitFailed) return false;
if (i == kNtWaitTimeout) return false;
if ((__sighandrvas[SIGCHLD] >= kSigactionMinRva) &&
(__sighandflags[SIGCHLD] & SA_NOCLDWAIT)) {
Make signal handling work well across platforms - Fix sigsuspend() on XNU - Fix strsignal() on non-Linux - Add unit tests for strsignal() - Add unit tests for setitimer() - Add unit tests for sigsuspend() - Rewrite setitimer() for New Technology - Rewrite nanosleep() for New Technology - Polyfill SIGALRM on the New Technology - select(0,0,0,0) on NT now calls pause() - Remove some NTDLL calls that aren't needed - Polyfill SA_NOCLDWAIT on the New Technology - Polyfill SA_RESETHAND on the New Technology - Polyfill sigprocmask() on the New Technology - Polyfill SIGCHLD+SIG_IGN on the New Technology - Polyfill SA_RESTART masking on the New Technology - Deliver console signals from main thread on New Technology - Document SA_RESTART behavior w/ @sarestartable / @norestart - System call trace in MODE=dbg now prints inherited FDs and signal mask
2022-03-25 14:11:44 +00:00
CloseHandle(handles[i]);
Fix many thread and file descriptor issues on Windows The greenbean web server now works nearly perfectly on Windows with over 1000 threads. But some synchronization issues still remain which prevent us from going over nine thousand.
2022-05-21 01:51:41 +00:00
__releasefd(pids[i]);
Make forking off threads reliable on Windows This change makes posix_spawn_test no longer flaky on Windows, by (1) fixing a race condition in wait(), and (2) removing a misguided vfork implementation which was letting Windows bypass pthread_atfork().
2023-07-30 15:55:01 +00:00
} else {
g_fds.p[pids[i]].zombie = true;
Make signal handling work well across platforms - Fix sigsuspend() on XNU - Fix strsignal() on non-Linux - Add unit tests for strsignal() - Add unit tests for setitimer() - Add unit tests for sigsuspend() - Rewrite setitimer() for New Technology - Rewrite nanosleep() for New Technology - Polyfill SIGALRM on the New Technology - select(0,0,0,0) on NT now calls pause() - Remove some NTDLL calls that aren't needed - Polyfill SA_NOCLDWAIT on the New Technology - Polyfill SA_RESETHAND on the New Technology - Polyfill sigprocmask() on the New Technology - Polyfill SIGCHLD+SIG_IGN on the New Technology - Polyfill SA_RESTART masking on the New Technology - Deliver console signals from main thread on New Technology - Document SA_RESTART behavior w/ @sarestartable / @norestart - System call trace in MODE=dbg now prints inherited FDs and signal mask
2022-03-25 14:11:44 +00:00
}
Make forking off threads reliable on Windows This change makes posix_spawn_test no longer flaky on Windows, by (1) fixing a race condition in wait(), and (2) removing a misguided vfork implementation which was letting Windows bypass pthread_atfork().
2023-07-30 15:55:01 +00:00
return true;
}
/**
* Checks to see if SIGCHLD should be raised on Windows.
* @return true if a signal was raised
* @note yoinked by fork-nt.c
*/
textwindows void _check_sigchld(void) {
bool should_signal;
Reduce makefile dependencies by 10% The includes in libc/calls/calls.h have now been refactored so that functions with struct parameters are declared in libc/calls/struct/
2022-06-09 03:01:28 +00:00
__fds_lock();
Make forking off threads reliable on Windows This change makes posix_spawn_test no longer flaky on Windows, by (1) fixing a race condition in wait(), and (2) removing a misguided vfork implementation which was letting Windows bypass pthread_atfork().
2023-07-30 15:55:01 +00:00
should_signal = CheckForExitedChildProcess();
Reduce makefile dependencies by 10% The includes in libc/calls/calls.h have now been refactored so that functions with struct parameters are declared in libc/calls/struct/
2022-06-09 03:01:28 +00:00
__fds_unlock();
Make forking off threads reliable on Windows This change makes posix_spawn_test no longer flaky on Windows, by (1) fixing a race condition in wait(), and (2) removing a misguided vfork implementation which was letting Windows bypass pthread_atfork().
2023-07-30 15:55:01 +00:00
if (should_signal) {
__sig_add(0, SIGCHLD, CLD_EXITED);
}
Polyfill SIGCHLD on the New Technology redbean will now cleanup child processes properly. New accounting information is available too, such as page faults and memory usage. The way it works is Cosmopolitan Libc samples the process collection on entry into read() and poll() to see if SIGCHLD needs to be raised. This change also fixes an issue with chibicc /tmp cleanup. There was also a regression in MODE=dbg because STL needed ASAN runtime support.
2022-03-23 04:04:08 +00:00
}
Get LIBC_RUNTIME and LIBC_CALLS building on aarch64
2023-05-09 08:56:56 +00:00
#endif /* __x86_64__ */
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