53 lines
2.9 KiB
C
53 lines
2.9 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 │
|
|
│ │
|
|
│ This program is free software; you can redistribute it and/or modify │
|
|
│ it under the terms of the GNU General Public License as published by │
|
|
│ the Free Software Foundation; version 2 of the License. │
|
|
│ │
|
|
│ This program is distributed in the hope that it will be useful, but │
|
|
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
|
|
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
|
|
│ General Public License for more details. │
|
|
│ │
|
|
│ You should have received a copy of the GNU General Public License │
|
|
│ along with this program; if not, write to the Free Software │
|
|
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
|
|
│ 02110-1301 USA │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/bits/bits.h"
|
|
#include "libc/calls/calls.h"
|
|
#include "libc/errno.h"
|
|
#include "libc/macros.h"
|
|
#include "libc/runtime/runtime.h"
|
|
#include "libc/runtime/symbols.internal.h"
|
|
#include "libc/str/str.h"
|
|
#include "libc/sysv/consts/auxv.h"
|
|
|
|
/**
|
|
* Returns path of binary with the debug information, or null.
|
|
*
|
|
* @return path to debug binary, or -1 w/ errno
|
|
*/
|
|
const char *FindDebugBinary(void) {
|
|
static char buf[PATH_MAX];
|
|
if (buf[0]) return &buf[0];
|
|
const char *const trybins[] = {program_invocation_name,
|
|
(const char *)getauxval(AT_EXECFN)};
|
|
for (unsigned i = 0; i < ARRAYLEN(trybins); ++i) {
|
|
const char *res = trybins[i];
|
|
unsigned len = strlen(res);
|
|
if (4 < len && len < sizeof(buf) - 5) {
|
|
if (strcmp(res + len - 4, ".dbg") == 0) return res;
|
|
/* try suffixing extension, e.g. .com → .com.dbg */
|
|
memcpy(mempcpy(buf, res, len), ".dbg", 5);
|
|
if (fileexists(buf)) return &buf[0];
|
|
buf[0] = '\0';
|
|
}
|
|
}
|
|
errno = ENOENT;
|
|
return NULL;
|
|
}
|