56 lines
2.7 KiB
C
56 lines
2.7 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 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/conv/itoa.h"
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#include "libc/runtime/missioncritical.h"
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#include "libc/str/str.h"
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#include "third_party/dlmalloc/dlmalloc.h"
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static uintptr_t lastfree_;
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void *AddressBirthAction(void *addr) {
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char buf[64], *p;
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p = buf;
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p = stpcpy(p, __FUNCTION__);
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p = stpcpy(p, ": 0x");
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p += uint64toarray_radix16((uintptr_t)addr, p);
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*p++ = '\n';
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__print(buf, p - buf);
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if (lastfree_ == (uintptr_t)addr) {
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lastfree_ = 0;
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}
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return addr;
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}
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void *AddressDeathAction(void *addr) {
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char buf[64], *p;
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p = buf;
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p = stpcpy(p, __FUNCTION__);
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p = stpcpy(p, ": 0x");
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p += uint64toarray_radix16((uintptr_t)addr, p);
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if (lastfree_ != (uintptr_t)addr) {
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lastfree_ = (uintptr_t)addr;
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} else {
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p = stpcpy(p, " [OBVIOUS DOUBLE FREE]");
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}
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*p++ = '\n';
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__print(buf, p - buf);
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return addr;
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}
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