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45 lines
2.8 KiB
C
45 lines
2.8 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 2023 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/assert.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/struct/sigset.internal.h"
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#include "libc/errno.h"
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#include "libc/fmt/itoa.h"
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#include "libc/intrin/describebacktrace.internal.h"
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#include "libc/runtime/runtime.h"
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#include "libc/runtime/symbols.internal.h"
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/**
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* Handles unassert() failure.
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*
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* Unlike __assert_fail() this doesn't call abort() and instead uses a
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* trapping assembly opcode. Standards require that abort() do a great
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* number of things. By doing this instead, we guarantee the backtrace
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* reported to the signal handler is clean and focused on the problem.
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*/
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void(unassert)(const char *expr, const char *file, int line) {
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char ibuf[12];
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sigset_t m = __sig_block();
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FormatInt32(ibuf, line);
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tinyprint(2, file, ":", ibuf, ": \e[31;1munassert(", expr,
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") failed\e[0m (cosmoaddr2line ", FindDebugBinary(), " ",
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DescribeBacktrace(__builtin_frame_address(0)), ")\n", NULL);
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__sig_unblock(m);
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notpossible;
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}
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