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https://github.com/jart/cosmopolitan.git
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44 lines
2.6 KiB
C
44 lines
2.6 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 2021 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/atomic.h"
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#include "libc/runtime/runtime.h"
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/**
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* System call logging enabled state.
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*
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* If Cosmopolitan was compiled with the `SYSDEBUG` macro (this is the
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* default behavior, except in tiny and release modes) then `__strace`
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* shall control whether or not system calls are logged to fd 2. If it's
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* greater than zero, syscalls are logged. Otherwise, they're aren't.
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*
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* By convention, functions wishing to disable syscall tracing for a
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* short time period should say:
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*
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* void foo() {
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* --__strace;
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* bar();
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* ++__strace;
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* }
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*
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* This way you still have some flexibility to force syscall tracing, by
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* setting `__strace` to a higher number like `2` or `200`. Even though
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* under normal circumstances, `__strace` should only be either zero or
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* one.
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*/
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atomic_int __strace;
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