mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 19:43:32 +00:00
072e1d2910
- 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
100 lines
4.3 KiB
C
100 lines
4.3 KiB
C
/*-*- 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 2020 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. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/bits/weaken.h"
|
|
#include "libc/calls/calls.h"
|
|
#include "libc/calls/internal.h"
|
|
#include "libc/calls/sig.internal.h"
|
|
#include "libc/calls/sigbits.h"
|
|
#include "libc/calls/strace.internal.h"
|
|
#include "libc/calls/struct/sigset.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/fmt/itoa.h"
|
|
#include "libc/intrin/asan.internal.h"
|
|
#include "libc/intrin/kprintf.h"
|
|
#include "libc/log/log.h"
|
|
#include "libc/str/str.h"
|
|
#include "libc/sysv/consts/sig.h"
|
|
#include "libc/sysv/errfuns.h"
|
|
|
|
static const char *DescribeHow(char buf[12], int how) {
|
|
if (how == SIG_BLOCK) return "SIG_BLOCK";
|
|
if (how == SIG_UNBLOCK) return "SIG_UNBLOCK";
|
|
if (how == SIG_SETMASK) return "SIG_SETMASK";
|
|
FormatInt32(buf, how);
|
|
return buf;
|
|
}
|
|
|
|
/**
|
|
* Changes signal blocking state of calling thread, e.g.:
|
|
*
|
|
* sigset_t neu,old;
|
|
* sigfillset(&neu);
|
|
* sigprocmask(SIG_BLOCK, &neu, &old);
|
|
* sigprocmask(SIG_SETMASK, &old, NULL);
|
|
*
|
|
* @param how can be SIG_BLOCK (U), SIG_UNBLOCK (/), SIG_SETMASK (=)
|
|
* @param set is the new mask content (optional)
|
|
* @param oldset will receive the old mask (optional) and can't overlap
|
|
* @return 0 on success, or -1 w/ errno
|
|
* @asyncsignalsafe
|
|
* @restartable
|
|
* @vforksafe
|
|
*/
|
|
int sigprocmask(int how, const sigset_t *opt_set, sigset_t *opt_out_oldset) {
|
|
sigset_t old;
|
|
char howbuf[12];
|
|
char buf[2][41];
|
|
int res, rc, arg1;
|
|
const sigset_t *arg2;
|
|
sigemptyset(&old);
|
|
if (IsAsan() &&
|
|
((opt_set && !__asan_is_valid(opt_set, sizeof(*opt_set))) ||
|
|
(opt_out_oldset &&
|
|
!__asan_is_valid(opt_out_oldset, sizeof(*opt_out_oldset))))) {
|
|
rc = efault();
|
|
} else if (IsLinux() || IsXnu() || IsFreebsd() || IsNetbsd()) {
|
|
rc = sys_sigprocmask(how, opt_set, opt_out_oldset ? &old : 0, 8);
|
|
} else if (IsOpenbsd()) {
|
|
if (opt_set) {
|
|
// openbsd only supports 32 signals so it passses them in a reg
|
|
arg1 = how;
|
|
arg2 = (sigset_t *)(uintptr_t)(*(uint32_t *)opt_set);
|
|
} else {
|
|
arg1 = how; // SIG_BLOCK
|
|
arg2 = 0; // changes nothing
|
|
}
|
|
if ((res = sys_sigprocmask(arg1, arg2, 0, 0)) != -1) {
|
|
memcpy(&old, &res, sizeof(res));
|
|
rc = 0;
|
|
} else {
|
|
rc = -1;
|
|
}
|
|
} else { // windows or metal
|
|
old = __sig_mask(opt_set);
|
|
_check_interrupts(false, 0);
|
|
rc = 0;
|
|
}
|
|
if (rc != -1 && opt_out_oldset) {
|
|
*opt_out_oldset = old;
|
|
}
|
|
STRACE("sigprocmask(%s, %s, [%s]) → %d% m", DescribeHow(howbuf, how),
|
|
__strace_sigset(buf[0], sizeof(buf[0]), 0, opt_set),
|
|
__strace_sigset(buf[1], sizeof(buf[1]), rc, opt_out_oldset), rc);
|
|
return rc;
|
|
}
|