Sweden-Number/dlls/msvcrt/except.c

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/*
* msvcrt.dll exception handling
*
* Copyright 2000 Jon Griffiths
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* Copyright 2005 Juan Lang
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
* FIXME: Incomplete support for nested exceptions/try block cleanup.
*/
#include <float.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
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#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winbase.h"
#include "winternl.h"
#include "wine/exception.h"
#include "msvcrt.h"
#include "excpt.h"
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#include "wincon.h"
#include "wine/debug.h"
#include "cppexcept.h"
WINE_DEFAULT_DEBUG_CHANNEL(seh);
#if _MSVCR_VER>=70 && _MSVCR_VER<=71
static MSVCRT_security_error_handler security_error_handler;
#endif
static __sighandler_t sighandlers[NSIG] = { SIG_DFL };
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static BOOL WINAPI msvcrt_console_handler(DWORD ctrlType)
{
BOOL ret = FALSE;
switch (ctrlType)
{
case CTRL_C_EVENT:
if (sighandlers[SIGINT])
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{
if (sighandlers[SIGINT] != SIG_IGN)
sighandlers[SIGINT](SIGINT);
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ret = TRUE;
}
break;
}
return ret;
}
/*********************************************************************
* __pxcptinfoptrs (MSVCRT.@)
*/
void** CDECL __pxcptinfoptrs(void)
{
return (void**)&msvcrt_get_thread_data()->xcptinfo;
}
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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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{
NTSTATUS status;
int signal;
} float_exception_map[] = {
{ EXCEPTION_FLT_DENORMAL_OPERAND, _FPE_DENORMAL },
{ EXCEPTION_FLT_DIVIDE_BY_ZERO, _FPE_ZERODIVIDE },
{ EXCEPTION_FLT_INEXACT_RESULT, _FPE_INEXACT },
{ EXCEPTION_FLT_INVALID_OPERATION, _FPE_INVALID },
{ EXCEPTION_FLT_OVERFLOW, _FPE_OVERFLOW },
{ EXCEPTION_FLT_STACK_CHECK, _FPE_STACKOVERFLOW },
{ EXCEPTION_FLT_UNDERFLOW, _FPE_UNDERFLOW },
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};
static LONG msvcrt_exception_filter(struct _EXCEPTION_POINTERS *except)
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{
LONG ret = EXCEPTION_CONTINUE_SEARCH;
__sighandler_t handler;
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if (!except || !except->ExceptionRecord)
return EXCEPTION_CONTINUE_SEARCH;
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switch (except->ExceptionRecord->ExceptionCode)
{
case EXCEPTION_ACCESS_VIOLATION:
if ((handler = sighandlers[SIGSEGV]) != SIG_DFL)
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{
if (handler != SIG_IGN)
{
EXCEPTION_POINTERS **ep = (EXCEPTION_POINTERS**)__pxcptinfoptrs(), *old_ep;
old_ep = *ep;
*ep = except;
sighandlers[SIGSEGV] = SIG_DFL;
handler(SIGSEGV);
*ep = old_ep;
}
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ret = EXCEPTION_CONTINUE_EXECUTION;
}
break;
/* According to msdn,
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* the FPE signal handler takes as a second argument the type of
* floating point exception.
*/
case EXCEPTION_FLT_DENORMAL_OPERAND:
case EXCEPTION_FLT_DIVIDE_BY_ZERO:
case EXCEPTION_FLT_INEXACT_RESULT:
case EXCEPTION_FLT_INVALID_OPERATION:
case EXCEPTION_FLT_OVERFLOW:
case EXCEPTION_FLT_STACK_CHECK:
case EXCEPTION_FLT_UNDERFLOW:
if ((handler = sighandlers[SIGFPE]) != SIG_DFL)
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{
if (handler != SIG_IGN)
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{
EXCEPTION_POINTERS **ep = (EXCEPTION_POINTERS**)__pxcptinfoptrs(), *old_ep;
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unsigned int i;
int float_signal = _FPE_INVALID;
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sighandlers[SIGFPE] = SIG_DFL;
for (i = 0; i < ARRAY_SIZE(float_exception_map); i++)
{
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if (float_exception_map[i].status ==
except->ExceptionRecord->ExceptionCode)
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{
float_signal = float_exception_map[i].signal;
break;
}
}
old_ep = *ep;
*ep = except;
((float_handler)handler)(SIGFPE, float_signal);
*ep = old_ep;
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}
ret = EXCEPTION_CONTINUE_EXECUTION;
}
break;
case EXCEPTION_ILLEGAL_INSTRUCTION:
case EXCEPTION_PRIV_INSTRUCTION:
if ((handler = sighandlers[SIGILL]) != SIG_DFL)
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{
if (handler != SIG_IGN)
{
EXCEPTION_POINTERS **ep = (EXCEPTION_POINTERS**)__pxcptinfoptrs(), *old_ep;
old_ep = *ep;
*ep = except;
sighandlers[SIGILL] = SIG_DFL;
handler(SIGILL);
*ep = old_ep;
}
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ret = EXCEPTION_CONTINUE_EXECUTION;
}
break;
}
return ret;
}
void msvcrt_init_signals(void)
{
SetConsoleCtrlHandler(msvcrt_console_handler, TRUE);
}
void msvcrt_free_signals(void)
{
SetConsoleCtrlHandler(msvcrt_console_handler, FALSE);
}
/*********************************************************************
* signal (MSVCRT.@)
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* Some signals may never be generated except through an explicit call to
* raise.
*/
__sighandler_t CDECL signal(int sig, __sighandler_t func)
{
__sighandler_t ret = SIG_ERR;
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TRACE("(%d, %p)\n", sig, func);
if (func == SIG_ERR) return SIG_ERR;
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switch (sig)
{
/* Cases handled internally. Note SIGTERM is never generated by Windows,
* so we effectively mask it.
*/
case SIGABRT:
case SIGFPE:
case SIGILL:
case SIGSEGV:
case SIGINT:
case SIGTERM:
case SIGBREAK:
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ret = sighandlers[sig];
sighandlers[sig] = func;
break;
default:
ret = SIG_ERR;
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}
return ret;
}
/*********************************************************************
* raise (MSVCRT.@)
*/
int CDECL raise(int sig)
{
__sighandler_t handler;
TRACE("(%d)\n", sig);
switch (sig)
{
case SIGFPE:
case SIGILL:
case SIGSEGV:
handler = sighandlers[sig];
if (handler == SIG_DFL) _exit(3);
if (handler != SIG_IGN)
{
EXCEPTION_POINTERS **ep = (EXCEPTION_POINTERS**)__pxcptinfoptrs(), *old_ep;
sighandlers[sig] = SIG_DFL;
old_ep = *ep;
*ep = NULL;
if (sig == SIGFPE)
((float_handler)handler)(sig, _FPE_EXPLICITGEN);
else
handler(sig);
*ep = old_ep;
}
break;
case SIGABRT:
case SIGINT:
case SIGTERM:
case SIGBREAK:
handler = sighandlers[sig];
if (handler == SIG_DFL) _exit(3);
if (handler != SIG_IGN)
{
sighandlers[sig] = SIG_DFL;
handler(sig);
}
break;
default:
return -1;
}
return 0;
}
/*********************************************************************
* _XcptFilter (MSVCRT.@)
*/
int CDECL _XcptFilter(NTSTATUS ex, PEXCEPTION_POINTERS ptr)
{
TRACE("(%08x,%p)\n", ex, ptr);
/* I assume ptr->ExceptionRecord->ExceptionCode is the same as ex */
return msvcrt_exception_filter(ptr);
}
/*********************************************************************
* _abnormal_termination (MSVCRT.@)
*/
int CDECL __intrinsic_abnormal_termination(void)
{
FIXME("(void)stub\n");
return 0;
}
/******************************************************************
* __uncaught_exception (MSVCRT.@)
*/
BOOL CDECL __uncaught_exception(void)
{
return msvcrt_get_thread_data()->processing_throw != 0;
}
#if _MSVCR_VER>=70 && _MSVCR_VER<=71
/*********************************************************************
* _set_security_error_handler (MSVCR70.@)
*/
MSVCRT_security_error_handler CDECL _set_security_error_handler(
MSVCRT_security_error_handler handler )
{
MSVCRT_security_error_handler old = security_error_handler;
TRACE("(%p)\n", handler);
security_error_handler = handler;
return old;
}
/*********************************************************************
* __security_error_handler (MSVCR70.@)
*/
void CDECL __security_error_handler(int code, void *data)
{
if(security_error_handler)
security_error_handler(code, data);
else
FIXME("(%d, %p) stub\n", code, data);
_exit(3);
}
#endif /* _MSVCR_VER>=70 && _MSVCR_VER<=71 */
#if _MSVCR_VER>=110
/*********************************************************************
* __crtSetUnhandledExceptionFilter (MSVCR110.@)
*/
LPTOP_LEVEL_EXCEPTION_FILTER CDECL __crtSetUnhandledExceptionFilter(LPTOP_LEVEL_EXCEPTION_FILTER filter)
{
return SetUnhandledExceptionFilter(filter);
}
#endif
/*********************************************************************
* _CreateFrameInfo (MSVCR80.@)
*/
frame_info* CDECL _CreateFrameInfo(frame_info *fi, void *obj)
{
thread_data_t *data = msvcrt_get_thread_data();
TRACE("(%p, %p)\n", fi, obj);
fi->next = data->frame_info_head;
data->frame_info_head = fi;
fi->object = obj;
return fi;
}
/*********************************************************************
* _FindAndUnlinkFrame (MSVCR80.@)
*/
void CDECL _FindAndUnlinkFrame(frame_info *fi)
{
thread_data_t *data = msvcrt_get_thread_data();
frame_info *cur = data->frame_info_head;
TRACE("(%p)\n", fi);
if (cur == fi)
{
data->frame_info_head = cur->next;
return;
}
for (; cur->next; cur = cur->next)
{
if (cur->next == fi)
{
cur->next = fi->next;
return;
}
}
ERR("frame not found, native crashes in this case\n");
}
/*********************************************************************
* _IsExceptionObjectToBeDestroyed (MSVCR80.@)
*/
BOOL __cdecl _IsExceptionObjectToBeDestroyed(const void *obj)
{
frame_info *cur;
TRACE( "%p\n", obj );
for (cur = msvcrt_get_thread_data()->frame_info_head; cur; cur = cur->next)
{
if (cur->object == obj)
return FALSE;
}
return TRUE;
}
/*********************************************************************
* __DestructExceptionObject (MSVCRT.@)
*/
void CDECL __DestructExceptionObject(EXCEPTION_RECORD *rec)
{
cxx_exception_type *info = (cxx_exception_type*) rec->ExceptionInformation[2];
void *object = (void*)rec->ExceptionInformation[1];
TRACE("(%p)\n", rec);
if (rec->ExceptionCode != CXX_EXCEPTION) return;
#ifndef __x86_64__
if (rec->NumberParameters != 3) return;
#else
if (rec->NumberParameters != 4) return;
#endif
if (rec->ExceptionInformation[0] < CXX_FRAME_MAGIC_VC6 ||
rec->ExceptionInformation[0] > CXX_FRAME_MAGIC_VC8) return;
if (!info || !info->destructor)
return;
#if defined(__i386__)
__asm__ __volatile__("call *%0" : : "r" (info->destructor), "c" (object) : "eax", "edx", "memory" );
#elif defined(__x86_64__)
((void (__cdecl*)(void*))(info->destructor+rec->ExceptionInformation[3]))(object);
#else
((void (__cdecl*)(void*))info->destructor)(object);
#endif
}
/*********************************************************************
* __CxxRegisterExceptionObject (MSVCRT.@)
*/
BOOL CDECL __CxxRegisterExceptionObject(EXCEPTION_POINTERS *ep, cxx_frame_info *frame_info)
{
thread_data_t *data = msvcrt_get_thread_data();
TRACE("(%p, %p)\n", ep, frame_info);
if (!ep || !ep->ExceptionRecord)
{
frame_info->rec = (void*)-1;
frame_info->context = (void*)-1;
return TRUE;
}
frame_info->rec = data->exc_record;
frame_info->context = data->ctx_record;
data->exc_record = ep->ExceptionRecord;
data->ctx_record = ep->ContextRecord;
_CreateFrameInfo(&frame_info->frame_info, (void*)ep->ExceptionRecord->ExceptionInformation[1]);
return TRUE;
}
/*********************************************************************
* __CxxUnregisterExceptionObject (MSVCRT.@)
*/
void CDECL __CxxUnregisterExceptionObject(cxx_frame_info *frame_info, BOOL in_use)
{
thread_data_t *data = msvcrt_get_thread_data();
TRACE("(%p)\n", frame_info);
if(frame_info->rec == (void*)-1)
return;
_FindAndUnlinkFrame(&frame_info->frame_info);
if(data->exc_record->ExceptionCode == CXX_EXCEPTION && !in_use
&& _IsExceptionObjectToBeDestroyed((void*)data->exc_record->ExceptionInformation[1]))
__DestructExceptionObject(data->exc_record);
data->exc_record = frame_info->rec;
data->ctx_record = frame_info->context;
}
struct __std_exception_data {
char *what;
bool dofree;
};
#if _MSVCR_VER>=140
/*********************************************************************
* __std_exception_copy (UCRTBASE.@)
*/
void CDECL __std_exception_copy(const struct __std_exception_data *src,
struct __std_exception_data *dst)
{
TRACE("(%p %p)\n", src, dst);
if(src->dofree && src->what) {
dst->what = _strdup(src->what);
dst->dofree = 1;
} else {
dst->what = src->what;
dst->dofree = 0;
}
}
/*********************************************************************
* __std_exception_destroy (UCRTBASE.@)
*/
void CDECL __std_exception_destroy(struct __std_exception_data *data)
{
TRACE("(%p)\n", data);
if(data->dofree)
free(data->what);
data->what = NULL;
data->dofree = 0;
}
/*********************************************************************
* __current_exception (UCRTBASE.@)
*/
void** CDECL __current_exception(void)
{
TRACE("()\n");
return (void**)&msvcrt_get_thread_data()->exc_record;
}
/*********************************************************************
* __current_exception_context (UCRTBASE.@)
*/
void** CDECL __current_exception_context(void)
{
TRACE("()\n");
return (void**)&msvcrt_get_thread_data()->ctx_record;
}
/*********************************************************************
* __processing_throw (UCRTBASE.@)
*/
int* CDECL __processing_throw(void)
{
TRACE("()\n");
return &msvcrt_get_thread_data()->processing_throw;
}
#endif /* _MSVCR_VER>=140 */