mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
cd672e251f
This change fixes a bug where exiting a crash signal handler on Windows after adding the signal to uc_sigmask, but not correcting the CPU state would cause the signal handler to loop infinitely, causing process hang Another issue is that very tiny programs, that don't link posix signals would not have their SIGILL / SIGSEGV / etc. status reported to Cosmo's bash shell when terminating on crash. That's fixed by a tiny handler in WinMain() that knows how to map WIN32 crash codes to the POSIX flavors.
107 lines
4.4 KiB
C
107 lines
4.4 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2024 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/sig.internal.h"
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#include "libc/intrin/pushpop.internal.h"
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#include "libc/nt/enum/signal.h"
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#include "libc/nt/enum/status.h"
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#include "libc/nt/struct/ntexceptionpointers.h"
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// this is all a mandatory dependency of winmain
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// so, we trade away maintanibility for tininess
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// see libc/sysv/consts.sh for canonical magnums
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#define SIGILL_ pushpop(4)
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#define SIGTRAP_ pushpop(5)
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#define SIGABRT_ pushpop(6)
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#define SIGFPE_ pushpop(8)
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#define SIGSEGV_ pushpop(11)
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#define SIGSYS_ pushpop(31)
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#define TRAP_BRKPT_ pushpop(1)
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#define ILL_ILLOPC_ pushpop(1)
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#define ILL_PRVOPC_ pushpop(5)
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#define SEGV_MAPERR_ pushpop(1)
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#define SEGV_ACCERR_ pushpop(2)
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#define SI_USER_ pushpop(0)
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#define FPE_FLTDIV_ pushpop(3)
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#define FPE_FLTOVF_ pushpop(4)
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#define FPE_INTOVF_ pushpop(2)
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#define FPE_FLTUND_ pushpop(5)
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#define FPE_FLTRES_ pushpop(6)
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#define FPE_FLTINV_ pushpop(7)
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#define SI_KERNEL_ 0x80
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textwindows int __sig_crash_sig(struct NtExceptionPointers *ep, int *code) {
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switch (ep->ExceptionRecord->ExceptionCode) {
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case kNtSignalBreakpoint:
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*code = TRAP_BRKPT_;
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return SIGTRAP_;
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case kNtSignalIllegalInstruction:
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*code = ILL_ILLOPC_;
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return SIGILL_;
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case kNtSignalPrivInstruction:
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*code = ILL_PRVOPC_;
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return SIGILL_;
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case kNtSignalInPageError:
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case kNtStatusStackOverflow:
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*code = SEGV_MAPERR_;
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return SIGSEGV_;
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case kNtSignalGuardPage:
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case kNtSignalAccessViolation:
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*code = SEGV_ACCERR_;
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return SIGSEGV_;
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case kNtSignalInvalidHandle:
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case kNtSignalInvalidParameter:
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case kNtSignalAssertionFailure:
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*code = SI_USER_;
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return SIGABRT_;
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case kNtStatusIntegerOverflow:
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*code = FPE_INTOVF_;
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return SIGFPE_;
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case kNtSignalFltDivideByZero:
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*code = FPE_FLTDIV_;
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return SIGFPE_;
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case kNtSignalFltOverflow:
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*code = FPE_FLTOVF_;
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return SIGFPE_;
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case kNtSignalFltUnderflow:
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*code = FPE_FLTUND_;
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return SIGFPE_;
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case kNtSignalFltInexactResult:
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*code = FPE_FLTRES_;
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return SIGFPE_;
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case kNtSignalFltDenormalOperand:
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case kNtSignalFltInvalidOperation:
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case kNtSignalFltStackCheck:
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case kNtSignalIntegerDivideByZero:
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case kNtSignalFloatMultipleFaults:
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case kNtSignalFloatMultipleTraps:
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*code = FPE_FLTINV_;
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return SIGFPE_;
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case kNtSignalDllNotFound:
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case kNtSignalOrdinalNotFound:
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case kNtSignalEntrypointNotFound:
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case kNtSignalDllInitFailed:
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*code = SI_KERNEL_;
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return SIGSYS_;
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default:
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*code = ep->ExceptionRecord->ExceptionCode;
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return SIGSEGV_;
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}
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}
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