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108 lines
3 KiB
C
108 lines
3 KiB
C
#include <precomp.h>
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#include "internal/wine/msvcrt.h"
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#include "internal/wine/cppexcept.h"
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typedef void (*sighandler_t)(int);
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static sighandler_t sighandlers[NSIG] = { SIG_DFL };
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/* The exception codes are actually NTSTATUS values */
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static const struct
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{
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NTSTATUS status;
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int signal;
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} float_exception_map[] = {
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{ EXCEPTION_FLT_DENORMAL_OPERAND, _FPE_DENORMAL },
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{ EXCEPTION_FLT_DIVIDE_BY_ZERO, _FPE_ZERODIVIDE },
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{ EXCEPTION_FLT_INEXACT_RESULT, _FPE_INEXACT },
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{ EXCEPTION_FLT_INVALID_OPERATION, _FPE_INVALID },
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{ EXCEPTION_FLT_OVERFLOW, _FPE_OVERFLOW },
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{ EXCEPTION_FLT_STACK_CHECK, _FPE_STACKOVERFLOW },
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{ EXCEPTION_FLT_UNDERFLOW, _FPE_UNDERFLOW },
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};
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/*
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* @implemented
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*/
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int
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_XcptFilter(DWORD ExceptionCode,
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struct _EXCEPTION_POINTERS * except)
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{
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LONG ret = EXCEPTION_CONTINUE_SEARCH;
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sighandler_t handler;
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if (!except || !except->ExceptionRecord)
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return EXCEPTION_CONTINUE_SEARCH;
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switch (except->ExceptionRecord->ExceptionCode)
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{
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case EXCEPTION_ACCESS_VIOLATION:
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if ((handler = sighandlers[SIGSEGV]) != SIG_DFL)
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{
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if (handler != SIG_IGN)
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{
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sighandlers[SIGSEGV] = SIG_DFL;
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handler(SIGSEGV);
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}
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ret = EXCEPTION_CONTINUE_EXECUTION;
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}
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break;
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/* According to msdn,
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* the FPE signal handler takes as a second argument the type of
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* floating point exception.
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*/
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case EXCEPTION_FLT_DENORMAL_OPERAND:
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case EXCEPTION_FLT_DIVIDE_BY_ZERO:
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case EXCEPTION_FLT_INEXACT_RESULT:
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case EXCEPTION_FLT_INVALID_OPERATION:
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case EXCEPTION_FLT_OVERFLOW:
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case EXCEPTION_FLT_STACK_CHECK:
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case EXCEPTION_FLT_UNDERFLOW:
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if ((handler = sighandlers[SIGFPE]) != SIG_DFL)
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{
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if (handler != SIG_IGN)
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{
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int i, float_signal = _FPE_INVALID;
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sighandlers[SIGFPE] = SIG_DFL;
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for (i = 0; i < sizeof(float_exception_map) /
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sizeof(float_exception_map[0]); i++)
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{
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if (float_exception_map[i].status ==
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except->ExceptionRecord->ExceptionCode)
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{
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float_signal = float_exception_map[i].signal;
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break;
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}
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}
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((float_handler)handler)(SIGFPE, float_signal);
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}
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ret = EXCEPTION_CONTINUE_EXECUTION;
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}
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break;
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case EXCEPTION_ILLEGAL_INSTRUCTION:
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if ((handler = sighandlers[SIGILL]) != SIG_DFL)
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{
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if (handler != SIG_IGN)
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{
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sighandlers[SIGILL] = SIG_DFL;
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handler(SIGILL);
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}
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ret = EXCEPTION_CONTINUE_EXECUTION;
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}
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break;
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}
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return ret;
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}
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int CDECL __CppXcptFilter(NTSTATUS ex, PEXCEPTION_POINTERS ptr)
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{
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/* only filter c++ exceptions */
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if (ex != CXX_EXCEPTION) return EXCEPTION_CONTINUE_SEARCH;
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return _XcptFilter( ex, ptr );
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}
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