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Introduce sigtimedwait() and sigwaitinfo()

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This change also invents sigcountset() and strsignal_r() and improves
the quality of siginfo_t handling.
This commit is contained in:
Justine Tunney 2022-10-10 07:36:07 -07:00
parent 7ae556463a
commit 467a332e38
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GPG key ID: BE714B4575D6E328
41 changed files with 887 additions and 345 deletions
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84
libc/intrin/describesiginfo.c Normal file
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/*-*- 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 2021 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/calls/struct/siginfo.h"
#include "libc/calls/struct/siginfo.internal.h"
#include "libc/dce.h"
#include "libc/intrin/asan.internal.h"
#include "libc/intrin/describeflags.internal.h"
#include "libc/intrin/kprintf.h"
#include "libc/intrin/weaken.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/sig.h"
#define N 300
#define append(...) i += ksnprintf(buf + i, N - i, __VA_ARGS__)
const char *(DescribeSiginfo)(char buf[N], int rc, const siginfo_t *si) {
int i = 0;
if (rc == -1) return "n/a";
if (!si) return "NULL";
if ((!IsAsan() && kisdangerous(si)) ||
(IsAsan() && !__asan_is_valid(si, sizeof(*si)))) {
ksnprintf(buf, N, "%p", si);
return buf;
}
append("{.si_signo=%s, si_code=%s", strsignal(si->si_signo),
DescribeSiCode(si->si_signo, si->si_code));
if (si->si_errno) {
append(", .si_errno=%s", DescribeErrno(si->si_errno));
}
if (si->si_signo == SIGILL || //
si->si_signo == SIGFPE || //
si->si_signo == SIGSEGV || //
si->si_signo == SIGBUS || //
si->si_signo == SIGTRAP) {
append(", .si_addr=%p, .si_addr_lsb=%d, .si_pkey=%u", si->si_addr,
si->si_addr_lsb, si->si_pkey);
} else if (si->si_signo == SIGALRM) {
append(", .si_timerid=%d, .si_overrun=%d", si->si_timerid, si->si_overrun);
} else {
if (si->si_pid) {
append(", .si_pid=%d", si->si_pid);
}
if (si->si_uid) {
append(", .si_uid=%d", si->si_uid);
}
}
if (si->si_status) {
append(", .si_status=%d", si->si_status);
}
if (si->si_utime) {
append(", .si_utime=%d", si->si_utime);
}
if (si->si_stime) {
append(", .si_stime=%d", si->si_stime);
}
append("}");
return buf;
}