306 lines
8.6 KiB
C
306 lines
8.6 KiB
C
/*
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* msvcrt.dll exception handling
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*
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* Copyright 2000 Jon Griffiths
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* Copyright 2005 Juan Lang
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*
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* FIXME: Incomplete support for nested exceptions/try block cleanup.
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <stdarg.h>
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "windef.h"
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#include "winbase.h"
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#include "winternl.h"
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#include "wine/exception.h"
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#include "msvcrt.h"
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#include "excpt.h"
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#include "wincon.h"
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#include "wine/debug.h"
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WINE_DEFAULT_DEBUG_CHANNEL(seh);
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static MSVCRT_security_error_handler security_error_handler;
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static MSVCRT___sighandler_t sighandlers[MSVCRT_NSIG] = { MSVCRT_SIG_DFL };
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static BOOL WINAPI msvcrt_console_handler(DWORD ctrlType)
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{
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BOOL ret = FALSE;
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switch (ctrlType)
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{
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case CTRL_C_EVENT:
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if (sighandlers[MSVCRT_SIGINT])
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{
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if (sighandlers[MSVCRT_SIGINT] != MSVCRT_SIG_IGN)
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sighandlers[MSVCRT_SIGINT](MSVCRT_SIGINT);
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ret = TRUE;
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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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/*********************************************************************
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* __pxcptinfoptrs (MSVCRT.@)
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*/
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void** CDECL MSVCRT___pxcptinfoptrs(void)
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{
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return (void**)&msvcrt_get_thread_data()->xcptinfo;
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}
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typedef void (CDECL *float_handler)(int, int);
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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, MSVCRT__FPE_DENORMAL },
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{ EXCEPTION_FLT_DIVIDE_BY_ZERO, MSVCRT__FPE_ZERODIVIDE },
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{ EXCEPTION_FLT_INEXACT_RESULT, MSVCRT__FPE_INEXACT },
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{ EXCEPTION_FLT_INVALID_OPERATION, MSVCRT__FPE_INVALID },
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{ EXCEPTION_FLT_OVERFLOW, MSVCRT__FPE_OVERFLOW },
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{ EXCEPTION_FLT_STACK_CHECK, MSVCRT__FPE_STACKOVERFLOW },
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{ EXCEPTION_FLT_UNDERFLOW, MSVCRT__FPE_UNDERFLOW },
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};
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static LONG msvcrt_exception_filter(struct _EXCEPTION_POINTERS *except)
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{
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LONG ret = EXCEPTION_CONTINUE_SEARCH;
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MSVCRT___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[MSVCRT_SIGSEGV]) != MSVCRT_SIG_DFL)
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{
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if (handler != MSVCRT_SIG_IGN)
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{
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EXCEPTION_POINTERS **ep = (EXCEPTION_POINTERS**)MSVCRT___pxcptinfoptrs(), *old_ep;
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old_ep = *ep;
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*ep = except;
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sighandlers[MSVCRT_SIGSEGV] = MSVCRT_SIG_DFL;
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handler(MSVCRT_SIGSEGV);
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*ep = old_ep;
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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[MSVCRT_SIGFPE]) != MSVCRT_SIG_DFL)
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{
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if (handler != MSVCRT_SIG_IGN)
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{
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EXCEPTION_POINTERS **ep = (EXCEPTION_POINTERS**)MSVCRT___pxcptinfoptrs(), *old_ep;
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unsigned int i;
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int float_signal = MSVCRT__FPE_INVALID;
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sighandlers[MSVCRT_SIGFPE] = MSVCRT_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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old_ep = *ep;
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*ep = except;
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((float_handler)handler)(MSVCRT_SIGFPE, float_signal);
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*ep = old_ep;
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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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case EXCEPTION_PRIV_INSTRUCTION:
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if ((handler = sighandlers[MSVCRT_SIGILL]) != MSVCRT_SIG_DFL)
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{
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if (handler != MSVCRT_SIG_IGN)
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{
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EXCEPTION_POINTERS **ep = (EXCEPTION_POINTERS**)MSVCRT___pxcptinfoptrs(), *old_ep;
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old_ep = *ep;
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*ep = except;
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sighandlers[MSVCRT_SIGILL] = MSVCRT_SIG_DFL;
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handler(MSVCRT_SIGILL);
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*ep = old_ep;
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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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void msvcrt_init_signals(void)
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{
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SetConsoleCtrlHandler(msvcrt_console_handler, TRUE);
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}
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void msvcrt_free_signals(void)
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{
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SetConsoleCtrlHandler(msvcrt_console_handler, FALSE);
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}
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/*********************************************************************
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* signal (MSVCRT.@)
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* Some signals may never be generated except through an explicit call to
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* raise.
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*/
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MSVCRT___sighandler_t CDECL MSVCRT_signal(int sig, MSVCRT___sighandler_t func)
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{
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MSVCRT___sighandler_t ret = MSVCRT_SIG_ERR;
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TRACE("(%d, %p)\n", sig, func);
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if (func == MSVCRT_SIG_ERR) return MSVCRT_SIG_ERR;
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switch (sig)
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{
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/* Cases handled internally. Note SIGTERM is never generated by Windows,
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* so we effectively mask it.
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*/
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case MSVCRT_SIGABRT:
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case MSVCRT_SIGFPE:
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case MSVCRT_SIGILL:
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case MSVCRT_SIGSEGV:
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case MSVCRT_SIGINT:
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case MSVCRT_SIGTERM:
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case MSVCRT_SIGBREAK:
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ret = sighandlers[sig];
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sighandlers[sig] = func;
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break;
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default:
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ret = MSVCRT_SIG_ERR;
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}
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return ret;
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}
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/*********************************************************************
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* raise (MSVCRT.@)
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*/
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int CDECL MSVCRT_raise(int sig)
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{
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MSVCRT___sighandler_t handler;
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TRACE("(%d)\n", sig);
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switch (sig)
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{
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case MSVCRT_SIGFPE:
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case MSVCRT_SIGILL:
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case MSVCRT_SIGSEGV:
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handler = sighandlers[sig];
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if (handler == MSVCRT_SIG_DFL) MSVCRT__exit(3);
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if (handler != MSVCRT_SIG_IGN)
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{
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EXCEPTION_POINTERS **ep = (EXCEPTION_POINTERS**)MSVCRT___pxcptinfoptrs(), *old_ep;
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sighandlers[sig] = MSVCRT_SIG_DFL;
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old_ep = *ep;
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*ep = NULL;
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if (sig == MSVCRT_SIGFPE)
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((float_handler)handler)(sig, MSVCRT__FPE_EXPLICITGEN);
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else
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handler(sig);
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*ep = old_ep;
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}
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break;
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case MSVCRT_SIGABRT:
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case MSVCRT_SIGINT:
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case MSVCRT_SIGTERM:
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case MSVCRT_SIGBREAK:
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handler = sighandlers[sig];
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if (handler == MSVCRT_SIG_DFL) MSVCRT__exit(3);
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if (handler != MSVCRT_SIG_IGN)
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{
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sighandlers[sig] = MSVCRT_SIG_DFL;
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handler(sig);
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}
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break;
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default:
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return -1;
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}
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return 0;
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}
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/*********************************************************************
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* _XcptFilter (MSVCRT.@)
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*/
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int CDECL _XcptFilter(NTSTATUS ex, PEXCEPTION_POINTERS ptr)
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{
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TRACE("(%08x,%p)\n", ex, ptr);
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/* I assume ptr->ExceptionRecord->ExceptionCode is the same as ex */
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return msvcrt_exception_filter(ptr);
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}
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/*********************************************************************
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* _abnormal_termination (MSVCRT.@)
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*/
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int CDECL _abnormal_termination(void)
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{
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FIXME("(void)stub\n");
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return 0;
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}
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/******************************************************************
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* MSVCRT___uncaught_exception
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*/
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BOOL CDECL MSVCRT___uncaught_exception(void)
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{
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return FALSE;
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}
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/* _set_security_error_handler - not exported in native msvcrt, added in msvcr70 */
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MSVCRT_security_error_handler CDECL _set_security_error_handler(
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MSVCRT_security_error_handler handler )
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{
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MSVCRT_security_error_handler old = security_error_handler;
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TRACE("(%p)\n", handler);
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security_error_handler = handler;
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return old;
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}
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