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https://github.com/jart/cosmopolitan.git
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60 lines
2.9 KiB
C
60 lines
2.9 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 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/calls/blockcancel.internal.h"
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#include "libc/calls/cp.internal.h"
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#include "libc/intrin/describebacktrace.h"
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#include "libc/intrin/kprintf.h"
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#include "libc/nexgen32e/stackframe.h"
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#include "libc/runtime/internal.h"
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#include "libc/runtime/runtime.h"
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#include "libc/thread/posixthread.internal.h"
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#include "libc/thread/tls.h"
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#ifdef MODE_DBG
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int begin_cancelation_point(void) {
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int state = 0;
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if (__tls_enabled) {
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struct PosixThread *pt;
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if ((pt = _pthread_self())) {
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state = pt->pt_flags & PT_INCANCEL;
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pt->pt_flags |= PT_INCANCEL;
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}
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}
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return state;
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}
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void end_cancelation_point(int state) {
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if (__tls_enabled) {
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struct PosixThread *pt;
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if ((pt = _pthread_self())) {
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pt->pt_flags &= ~PT_INCANCEL;
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pt->pt_flags |= state;
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}
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}
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}
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void report_cancelation_point(int sysv_ordinal, int xnu_ordinal) {
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char bt[160];
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struct StackFrame *bp = __builtin_frame_address(0);
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kprintf("error: report_cancelation_point(%#x, %#x) %s\n", sysv_ordinal,
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xnu_ordinal, _DescribeBacktrace(bt, bp));
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__builtin_trap();
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}
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#endif /* MODE_DBG */
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