539 lines
14 KiB
C
539 lines
14 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 <float.h>
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#include <signal.h>
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#include <stdarg.h>
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#include <stdbool.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 "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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#include "cppexcept.h"
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WINE_DEFAULT_DEBUG_CHANNEL(seh);
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#if _MSVCR_VER>=70 && _MSVCR_VER<=71
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static MSVCRT_security_error_handler security_error_handler;
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#endif
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static __sighandler_t sighandlers[NSIG] = { 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[SIGINT])
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{
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if (sighandlers[SIGINT] != SIG_IGN)
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sighandlers[SIGINT](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 __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, _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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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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__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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EXCEPTION_POINTERS **ep = (EXCEPTION_POINTERS**)__pxcptinfoptrs(), *old_ep;
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old_ep = *ep;
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*ep = except;
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sighandlers[SIGSEGV] = SIG_DFL;
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handler(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[SIGFPE]) != SIG_DFL)
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{
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if (handler != SIG_IGN)
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{
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EXCEPTION_POINTERS **ep = (EXCEPTION_POINTERS**)__pxcptinfoptrs(), *old_ep;
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unsigned int i;
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int float_signal = _FPE_INVALID;
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sighandlers[SIGFPE] = SIG_DFL;
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for (i = 0; i < ARRAY_SIZE(float_exception_map); 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)(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[SIGILL]) != SIG_DFL)
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{
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if (handler != SIG_IGN)
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{
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EXCEPTION_POINTERS **ep = (EXCEPTION_POINTERS**)__pxcptinfoptrs(), *old_ep;
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old_ep = *ep;
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*ep = except;
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sighandlers[SIGILL] = SIG_DFL;
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handler(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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__sighandler_t CDECL signal(int sig, __sighandler_t func)
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{
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__sighandler_t ret = SIG_ERR;
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TRACE("(%d, %p)\n", sig, func);
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if (func == SIG_ERR) return 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 SIGABRT:
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case SIGFPE:
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case SIGILL:
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case SIGSEGV:
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case SIGINT:
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case SIGTERM:
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case 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 = 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 raise(int sig)
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{
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__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 SIGFPE:
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case SIGILL:
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case SIGSEGV:
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handler = sighandlers[sig];
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if (handler == SIG_DFL) _exit(3);
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if (handler != SIG_IGN)
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{
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EXCEPTION_POINTERS **ep = (EXCEPTION_POINTERS**)__pxcptinfoptrs(), *old_ep;
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sighandlers[sig] = SIG_DFL;
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old_ep = *ep;
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*ep = NULL;
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if (sig == SIGFPE)
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((float_handler)handler)(sig, _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 SIGABRT:
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case SIGINT:
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case SIGTERM:
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case SIGBREAK:
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handler = sighandlers[sig];
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if (handler == SIG_DFL) _exit(3);
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if (handler != SIG_IGN)
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{
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sighandlers[sig] = 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 __intrinsic_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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* __uncaught_exception (MSVCRT.@)
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*/
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BOOL CDECL __uncaught_exception(void)
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{
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return msvcrt_get_thread_data()->processing_throw != 0;
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}
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#if _MSVCR_VER>=70 && _MSVCR_VER<=71
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/*********************************************************************
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* _set_security_error_handler (MSVCR70.@)
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*/
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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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/*********************************************************************
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* __security_error_handler (MSVCR70.@)
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*/
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void CDECL __security_error_handler(int code, void *data)
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{
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if(security_error_handler)
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security_error_handler(code, data);
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else
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FIXME("(%d, %p) stub\n", code, data);
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_exit(3);
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}
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#endif /* _MSVCR_VER>=70 && _MSVCR_VER<=71 */
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#if _MSVCR_VER>=110
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/*********************************************************************
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* __crtSetUnhandledExceptionFilter (MSVCR110.@)
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*/
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LPTOP_LEVEL_EXCEPTION_FILTER CDECL __crtSetUnhandledExceptionFilter(LPTOP_LEVEL_EXCEPTION_FILTER filter)
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{
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return SetUnhandledExceptionFilter(filter);
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}
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#endif
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/*********************************************************************
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* _CreateFrameInfo (MSVCR80.@)
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*/
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frame_info* CDECL _CreateFrameInfo(frame_info *fi, void *obj)
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{
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thread_data_t *data = msvcrt_get_thread_data();
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TRACE("(%p, %p)\n", fi, obj);
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fi->next = data->frame_info_head;
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data->frame_info_head = fi;
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fi->object = obj;
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return fi;
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}
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/*********************************************************************
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* _FindAndUnlinkFrame (MSVCR80.@)
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*/
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void CDECL _FindAndUnlinkFrame(frame_info *fi)
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{
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thread_data_t *data = msvcrt_get_thread_data();
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frame_info *cur = data->frame_info_head;
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TRACE("(%p)\n", fi);
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if (cur == fi)
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{
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data->frame_info_head = cur->next;
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return;
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}
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for (; cur->next; cur = cur->next)
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{
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if (cur->next == fi)
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{
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cur->next = fi->next;
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return;
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}
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}
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ERR("frame not found, native crashes in this case\n");
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}
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/*********************************************************************
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* _IsExceptionObjectToBeDestroyed (MSVCR80.@)
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*/
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BOOL __cdecl _IsExceptionObjectToBeDestroyed(const void *obj)
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{
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frame_info *cur;
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TRACE( "%p\n", obj );
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for (cur = msvcrt_get_thread_data()->frame_info_head; cur; cur = cur->next)
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{
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if (cur->object == obj)
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return FALSE;
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}
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return TRUE;
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}
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/*********************************************************************
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* __DestructExceptionObject (MSVCRT.@)
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*/
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void CDECL __DestructExceptionObject(EXCEPTION_RECORD *rec)
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{
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cxx_exception_type *info = (cxx_exception_type*) rec->ExceptionInformation[2];
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void *object = (void*)rec->ExceptionInformation[1];
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TRACE("(%p)\n", rec);
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if (rec->ExceptionCode != CXX_EXCEPTION) return;
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#ifndef __x86_64__
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if (rec->NumberParameters != 3) return;
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#else
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if (rec->NumberParameters != 4) return;
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#endif
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if (rec->ExceptionInformation[0] < CXX_FRAME_MAGIC_VC6 ||
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rec->ExceptionInformation[0] > CXX_FRAME_MAGIC_VC8) return;
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if (!info || !info->destructor)
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return;
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#if defined(__i386__)
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__asm__ __volatile__("call *%0" : : "r" (info->destructor), "c" (object) : "eax", "edx", "memory" );
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#elif defined(__x86_64__)
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((void (__cdecl*)(void*))(info->destructor+rec->ExceptionInformation[3]))(object);
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#else
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((void (__cdecl*)(void*))info->destructor)(object);
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#endif
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}
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/*********************************************************************
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* __CxxRegisterExceptionObject (MSVCRT.@)
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*/
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BOOL CDECL __CxxRegisterExceptionObject(EXCEPTION_POINTERS *ep, cxx_frame_info *frame_info)
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{
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thread_data_t *data = msvcrt_get_thread_data();
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TRACE("(%p, %p)\n", ep, frame_info);
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if (!ep || !ep->ExceptionRecord)
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{
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frame_info->rec = (void*)-1;
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frame_info->context = (void*)-1;
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return TRUE;
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}
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frame_info->rec = data->exc_record;
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frame_info->context = data->ctx_record;
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data->exc_record = ep->ExceptionRecord;
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data->ctx_record = ep->ContextRecord;
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_CreateFrameInfo(&frame_info->frame_info, (void*)ep->ExceptionRecord->ExceptionInformation[1]);
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return TRUE;
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}
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/*********************************************************************
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* __CxxUnregisterExceptionObject (MSVCRT.@)
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*/
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void CDECL __CxxUnregisterExceptionObject(cxx_frame_info *frame_info, BOOL in_use)
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{
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thread_data_t *data = msvcrt_get_thread_data();
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TRACE("(%p)\n", frame_info);
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if(frame_info->rec == (void*)-1)
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return;
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_FindAndUnlinkFrame(&frame_info->frame_info);
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if(data->exc_record->ExceptionCode == CXX_EXCEPTION && !in_use
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&& _IsExceptionObjectToBeDestroyed((void*)data->exc_record->ExceptionInformation[1]))
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__DestructExceptionObject(data->exc_record);
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data->exc_record = frame_info->rec;
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data->ctx_record = frame_info->context;
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}
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struct __std_exception_data {
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char *what;
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char dofree;
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};
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#if _MSVCR_VER>=140
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/*********************************************************************
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* __std_exception_copy (UCRTBASE.@)
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*/
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void CDECL __std_exception_copy(const struct __std_exception_data *src,
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struct __std_exception_data *dst)
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{
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TRACE("(%p %p)\n", src, dst);
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if(src->dofree && src->what) {
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dst->what = _strdup(src->what);
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dst->dofree = 1;
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} else {
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dst->what = src->what;
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dst->dofree = 0;
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}
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}
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/*********************************************************************
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* __std_exception_destroy (UCRTBASE.@)
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*/
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void CDECL __std_exception_destroy(struct __std_exception_data *data)
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{
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TRACE("(%p)\n", data);
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if(data->dofree)
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free(data->what);
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data->what = NULL;
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data->dofree = 0;
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}
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/*********************************************************************
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* __current_exception (UCRTBASE.@)
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*/
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void** CDECL __current_exception(void)
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{
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TRACE("()\n");
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return (void**)&msvcrt_get_thread_data()->exc_record;
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}
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/*********************************************************************
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* __current_exception_context (UCRTBASE.@)
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*/
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void** CDECL __current_exception_context(void)
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{
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TRACE("()\n");
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return (void**)&msvcrt_get_thread_data()->ctx_record;
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}
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/*********************************************************************
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* __processing_throw (UCRTBASE.@)
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*/
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int* CDECL __processing_throw(void)
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{
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TRACE("()\n");
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return &msvcrt_get_thread_data()->processing_throw;
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}
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#endif /* _MSVCR_VER>=140 */
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