55 lines
2.8 KiB
C
55 lines
2.8 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/assert.h"
|
|
#include "libc/bits/weaken.h"
|
|
#include "libc/calls/calls.h"
|
|
#include "libc/log/log.h"
|
|
#include "libc/macros.h"
|
|
#include "libc/mem/alloca.h"
|
|
#include "libc/runtime/runtime.h"
|
|
#include "libc/str/str.h"
|
|
#include "libc/sysv/consts/fileno.h"
|
|
|
|
/**
|
|
* Handles failure of assert() macro.
|
|
*/
|
|
relegated void __assert_fail(const char *expr, const char *file, int line) {
|
|
static bool once;
|
|
char *msg, *p, linebuf[16];
|
|
unsigned i, exprlen, filelen;
|
|
if (!once) {
|
|
once = true;
|
|
exprlen = expr ? strlen(expr) : 0;
|
|
filelen = file ? strlen(file) : 0;
|
|
p = msg = alloca(MIN(512, exprlen + filelen + 64));
|
|
p = mempcpy(p, file, filelen);
|
|
p = stpcpy(p, ":");
|
|
if (line < 1) line = 1;
|
|
for (i = 0; line; line /= 10) linebuf[i++] = '0' + line % 10;
|
|
while (i) *p++ = linebuf[--i];
|
|
p = stpcpy(p, ":");
|
|
p = mempcpy(p, expr, exprlen);
|
|
p = stpcpy(p, "\r\n");
|
|
write(STDERR_FILENO, msg, p - msg);
|
|
if (weaken(__die)) weaken(__die)();
|
|
}
|
|
abort();
|
|
unreachable;
|
|
}
|