mirror of
https://github.com/jart/cosmopolitan.git
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f2af97711b
- Improve compatibility with Blink virtual machine - Add non-POSIX APIs for joining threads and signal masks - Never ever use anything except 32-bit integers for atomics - Add some `#undef` statements to workaround `ctags` problems
87 lines
3.6 KiB
C
87 lines
3.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/calls.h"
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#include "libc/calls/struct/sigaction.h"
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#include "libc/calls/struct/sigset.h"
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#include "libc/calls/struct/sigset.internal.h"
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#include "libc/dce.h"
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#include "libc/intrin/asan.internal.h"
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#include "libc/intrin/describeflags.internal.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/mem/alloca.h"
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#include "libc/sysv/consts/sa.h"
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#ifdef DescribeSigaction
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#undef DescribeSigaction
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#endif
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static const char *DescribeSigHandler(char buf[64], void f(int)) {
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if (f == SIG_ERR) return "SIG_ERR";
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if (f == SIG_DFL) return "SIG_DFL";
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if (f == SIG_IGN) return "SIG_IGN";
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ksnprintf(buf, 64, "%t", f);
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return buf;
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}
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static const char *DescribeSigFlags(char buf[64], int x) {
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const struct DescribeFlags kSigFlags[] = {
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{SA_NOCLDSTOP, "NOCLDSTOP"}, //
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{SA_NOCLDWAIT, "NOCLDWAIT"}, //
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{SA_SIGINFO, "SIGINFO"}, //
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{SA_ONSTACK, "ONSTACK"}, //
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{SA_RESTART, "RESTART"}, //
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{SA_NODEFER, "NODEFER"}, //
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{SA_RESETHAND, "RESETHAND"}, //
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{SA_NOMASK, "NOMASK"}, //
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{SA_ONESHOT, "ONESHOT"}, //
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};
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return DescribeFlags(buf, 64, kSigFlags, ARRAYLEN(kSigFlags), "SA_", x);
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}
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#define N 256
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#define append(...) o += ksnprintf(buf + o, N - o, __VA_ARGS__)
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const char *DescribeSigaction(char buf[N], int rc, const struct sigaction *sa) {
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int o = 0;
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char b64[64];
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if (rc == -1) return "n/a";
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if (!sa) return "NULL";
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if ((!IsAsan() && kisdangerous(sa)) ||
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(IsAsan() && !__asan_is_valid(sa, sizeof(*sa)))) {
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ksnprintf(buf, N, "%p", sa);
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return buf;
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}
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append("{.sa_handler=%s", DescribeSigHandler(b64, sa->sa_handler));
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if (sa->sa_flags) {
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append(", .sa_flags=%s", DescribeSigFlags(b64, sa->sa_flags));
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}
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if (!sigisemptyset(&sa->sa_mask)) {
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append(", .sa_mask=%s", DescribeSigset(rc, &sa->sa_mask));
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}
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append("}");
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return buf;
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}
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