mirror of
https://github.com/jart/cosmopolitan.git
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ec2cb88058
- Document more compiler flags - Expose new __print_maps() api - Better overflow checking in mmap() - Improve the shell example somewhat - Fix minor runtime bugs regarding stacks - Make kill() on fork()+execve()'d children work - Support CLONE_CHILD_CLEARTID for proper joining - Fix recent possible deadlock regression with --ftrace
40 lines
2.4 KiB
C
40 lines
2.4 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 2022 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/bits/weaken.h"
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#include "libc/calls/calls.h"
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#include "libc/intrin/asan.internal.h"
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#include "libc/intrin/asancodes.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/runtime/runtime.h"
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#include "libc/sysv/consts/map.h"
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#include "libc/sysv/consts/prot.h"
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/**
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* Acquires more system memory for dlmalloc.
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*/
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void *dlmalloc_requires_more_vespene_gas(size_t size) {
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char *p;
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if ((p = mmap(0, size, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS,
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-1, 0)) != MAP_FAILED) {
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if (weaken(__asan_poison)) {
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weaken(__asan_poison)(p, size, kAsanHeapFree);
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}
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}
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return p;
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}
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