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https://github.com/jart/cosmopolitan.git
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57c0b065c8
It's now possible to safely print C++ backtraces from signal handlers. This symbol demangler doesn't need malloc, tls, or even static memory. Additionally, this change makes it 2x faster and adds test cases. It's almost as performant and accurate as the libcxxabi implementation now.
37 lines
2.3 KiB
C
37 lines
2.3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et 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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│ 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/macros.internal.h"
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#include "libc/runtime/memtrack.internal.h"
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#include "libc/runtime/runtime.h"
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// TODO(jart): DELETE
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/**
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* Returns true if address isn't stack and was malloc'd or mmap'd.
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*
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* @assume stack addresses are always greater than heap addresses
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* @assume stack memory isn't stored beneath %rsp (-mno-red-zone)
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* @deprecated
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*/
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optimizesize bool32 _isheap(const void *p) {
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intptr_t x, y;
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x = kAutomapStart;
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y = x + kAutomapSize;
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return x <= (intptr_t)p && (intptr_t)p < y;
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}
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