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wine/dlls/msvcrt/except.c

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/*
* msvcrt.dll exception handling
*
* Copyright 2000 Jon Griffiths
* 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>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winbase.h"
#include "winternl.h"
#include "msvcrt.h"
#include "excpt.h"
#include "wincon.h"
#include "wine/exception.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 };
void dump_function_descr( const cxx_function_descr *descr, uintptr_t base )
{
unwind_info *unwind_table = rtti_rva( descr->unwind_table, base );
tryblock_info *tryblock = rtti_rva( descr->tryblock, base );
ipmap_info *ipmap = rtti_rva( descr->ipmap, base );
UINT i, j;
TRACE( "magic %x\n", descr->magic );
TRACE( "unwind table: %p %d\n", unwind_table, descr->unwind_count );
for (i = 0; i < descr->unwind_count; i++)
{
TRACE(" %d: prev %d func %p\n", i, unwind_table[i].prev,
unwind_table[i].handler ? rtti_rva( unwind_table[i].handler, base ) : NULL );
}
TRACE( "try table: %p %d\n", tryblock, descr->tryblock_count );
for (i = 0; i < descr->tryblock_count; i++)
{
catchblock_info *catchblock = rtti_rva( tryblock[i].catchblock, base );
TRACE( " %d: start %d end %d catchlevel %d catch %p %d\n", i,
tryblock[i].start_level, tryblock[i].end_level,
tryblock[i].catch_level, catchblock, tryblock[i].catchblock_count);
for (j = 0; j < tryblock[i].catchblock_count; j++)
{
type_info *type_info = catchblock[j].type_info ? rtti_rva( catchblock[j].type_info, base ) : NULL;
TRACE( " %d: flags %x offset %d handler %p",
j, catchblock[j].flags, catchblock[j].offset,
catchblock[j].handler ? rtti_rva(catchblock[j].handler, base) : NULL );
#ifdef _WIN64
TRACE( " frame %x", catchblock[j].frame );
#endif
TRACE( " type %p %s\n", type_info, dbgstr_type_info(type_info) );
}
}
TRACE( "ipmap: %p %d\n", ipmap, descr->ipmap_count );
for (i = 0; i < descr->ipmap_count; i++)
TRACE( " %d: ip %x state %d\n", i, ipmap[i].ip, ipmap[i].state );
#ifdef RTTI_USE_RVA
TRACE( "unwind_help %+d\n", descr->unwind_help );
#endif
if (descr->magic <= CXX_FRAME_MAGIC_VC6) return;
TRACE( "expect list: %p\n", rtti_rva( descr->expect_list, base ) );
if (descr->magic <= CXX_FRAME_MAGIC_VC7) return;
TRACE( "flags: %08x\n", descr->flags );
}
void *find_catch_handler( void *object, uintptr_t frame, uintptr_t exc_base,
const tryblock_info *tryblock,
cxx_exception_type *exc_type, uintptr_t image_base )
{
unsigned int i;
const catchblock_info *catchblock = rtti_rva( tryblock->catchblock, image_base );
const cxx_type_info *type;
const type_info *catch_ti;
for (i = 0; i < tryblock->catchblock_count; i++)
{
if (exc_type)
{
catch_ti = catchblock[i].type_info ? rtti_rva( catchblock[i].type_info, image_base ) : NULL;
type = find_caught_type( exc_type, exc_base, catch_ti, catchblock[i].flags );
if (!type) continue;
TRACE( "matched type %p in catchblock %d\n", type, i );
if (catch_ti && catch_ti->mangled[0] && catchblock[i].offset)
{
/* copy the exception to its destination on the stack */
void **dest = (void **)(frame + catchblock[i].offset);
copy_exception( object, dest, catchblock[i].flags, type, exc_base );
}
}
else
{
/* no CXX_EXCEPTION only proceed with a catch(...) block*/
if (catchblock[i].type_info) continue;
TRACE( "found catch(...) block\n" );
}
return rtti_rva( catchblock[i].handler, image_base );
}
return NULL;
}
#ifndef __i386__ /* i386 implementation is in except_i386.c */
typedef struct
{
cxx_frame_info frame_info;
BOOL rethrow;
EXCEPTION_RECORD *prev_rec;
} cxx_catch_ctx;
typedef struct
{
ULONG_PTR dest_frame;
ULONG_PTR orig_frame;
EXCEPTION_RECORD *seh_rec;
DISPATCHER_CONTEXT *dispatch;
const cxx_function_descr *descr;
} se_translator_ctx;
static inline int ip_to_state( const cxx_function_descr *descr, uintptr_t ip, uintptr_t base )
{
const ipmap_info *ipmap = rtti_rva( descr->ipmap, base );
unsigned int i;
int ret;
for (i = 0; i < descr->ipmap_count; i++) if (base + ipmap[i].ip > ip) break;
ret = i ? ipmap[i - 1].state : -1;
TRACE( "%Ix -> %d\n", ip, ret );
return ret;
}
static void cxx_local_unwind(ULONG_PTR frame, DISPATCHER_CONTEXT *dispatch,
const cxx_function_descr *descr, int last_level)
{
const unwind_info *unwind_table = rtti_rva(descr->unwind_table, dispatch->ImageBase);
int *unwind_help = (int *)(frame + descr->unwind_help);
int trylevel = unwind_help[0];
if (trylevel == -2) trylevel = ip_to_state( descr, get_exception_pc(dispatch), dispatch->ImageBase );
TRACE("current level: %d, last level: %d\n", trylevel, last_level);
while (trylevel > last_level)
{
if (trylevel<0 || trylevel>=descr->unwind_count)
{
ERR("invalid trylevel %d\n", trylevel);
terminate();
}
if (unwind_table[trylevel].handler)
{
void *handler = rtti_rva( unwind_table[trylevel].handler, dispatch->ImageBase );
call_unwind_handler( handler, frame, dispatch );
}
trylevel = unwind_table[trylevel].prev;
}
unwind_help[0] = trylevel;
}
static LONG CALLBACK cxx_rethrow_filter(PEXCEPTION_POINTERS eptrs, void *c)
{
EXCEPTION_RECORD *rec = eptrs->ExceptionRecord;
cxx_catch_ctx *ctx = c;
if (rec->ExceptionCode != CXX_EXCEPTION)
return EXCEPTION_CONTINUE_SEARCH;
if (!rec->ExceptionInformation[1] && !rec->ExceptionInformation[2])
return EXCEPTION_EXECUTE_HANDLER;
if (rec->ExceptionInformation[1] == ctx->prev_rec->ExceptionInformation[1])
ctx->rethrow = TRUE;
return EXCEPTION_CONTINUE_SEARCH;
}
static void CALLBACK cxx_catch_cleanup(BOOL normal, void *c)
{
cxx_catch_ctx *ctx = c;
__CxxUnregisterExceptionObject(&ctx->frame_info, ctx->rethrow);
}
static void* WINAPI call_catch_block(EXCEPTION_RECORD *rec)
{
ULONG_PTR frame = rec->ExceptionInformation[1];
const cxx_function_descr *descr = (void*)rec->ExceptionInformation[2];
EXCEPTION_RECORD *prev_rec = (void*)rec->ExceptionInformation[4];
EXCEPTION_RECORD *untrans_rec = (void*)rec->ExceptionInformation[6];
CONTEXT *context = (void*)rec->ExceptionInformation[7];
int *unwind_help = (int *)(frame + descr->unwind_help);
EXCEPTION_POINTERS ep = { prev_rec, context };
cxx_catch_ctx ctx;
void *ret_addr = NULL;
ctx.rethrow = FALSE;
ctx.prev_rec = prev_rec;
__CxxRegisterExceptionObject(&ep, &ctx.frame_info);
msvcrt_get_thread_data()->processing_throw--;
__TRY
{
__TRY
{
ret_addr = call_catch_handler( rec );
}
__EXCEPT_CTX(cxx_rethrow_filter, &ctx)
{
TRACE("detect rethrow: exception code: %lx\n", prev_rec->ExceptionCode);
ctx.rethrow = TRUE;
if (untrans_rec)
{
__DestructExceptionObject(prev_rec);
RaiseException(untrans_rec->ExceptionCode, untrans_rec->ExceptionFlags,
untrans_rec->NumberParameters, untrans_rec->ExceptionInformation);
}
else
{
RaiseException(prev_rec->ExceptionCode, prev_rec->ExceptionFlags,
prev_rec->NumberParameters, prev_rec->ExceptionInformation);
}
}
__ENDTRY
}
__FINALLY_CTX(cxx_catch_cleanup, &ctx)
unwind_help[0] = -2;
unwind_help[1] = -1;
return ret_addr;
}
static inline BOOL cxx_is_consolidate(const EXCEPTION_RECORD *rec)
{
return (rec->ExceptionCode == STATUS_UNWIND_CONSOLIDATE &&
rec->NumberParameters > 10 &&
rec->ExceptionInformation[0] == (ULONG_PTR)call_catch_block);
}
static inline void find_catch_block(EXCEPTION_RECORD *rec, CONTEXT *context,
EXCEPTION_RECORD *untrans_rec,
ULONG_PTR frame, DISPATCHER_CONTEXT *dispatch,
const cxx_function_descr *descr,
cxx_exception_type *info, ULONG_PTR orig_frame)
{
ULONG_PTR exc_base = (rec->NumberParameters == 4 ? rec->ExceptionInformation[3] : 0);
void *handler, *object = (void *)rec->ExceptionInformation[1];
int trylevel = ip_to_state( descr, get_exception_pc(dispatch), dispatch->ImageBase );
thread_data_t *data = msvcrt_get_thread_data();
const tryblock_info *in_catch;
EXCEPTION_RECORD catch_record;
CONTEXT ctx;
UINT i;
INT *unwind_help;
data->processing_throw++;
for (i=descr->tryblock_count; i>0; i--)
{
in_catch = rtti_rva(descr->tryblock, dispatch->ImageBase);
in_catch = &in_catch[i-1];
if (trylevel>in_catch->end_level && trylevel<=in_catch->catch_level)
break;
}
if (!i)
in_catch = NULL;
unwind_help = (int *)(orig_frame + descr->unwind_help);
if (trylevel > unwind_help[1])
unwind_help[0] = unwind_help[1] = trylevel;
else
trylevel = unwind_help[1];
TRACE("current trylevel: %d\n", trylevel);
for (i=0; i<descr->tryblock_count; i++)
{
const tryblock_info *tryblock = rtti_rva(descr->tryblock, dispatch->ImageBase);
tryblock = &tryblock[i];
if (trylevel < tryblock->start_level) continue;
if (trylevel > tryblock->end_level) continue;
if (in_catch)
{
if(tryblock->start_level <= in_catch->end_level) continue;
if(tryblock->end_level > in_catch->catch_level) continue;
}
handler = find_catch_handler( object, orig_frame, exc_base, tryblock, info, dispatch->ImageBase );
if (!handler) continue;
/* unwind stack and call catch */
memset(&catch_record, 0, sizeof(catch_record));
catch_record.ExceptionCode = STATUS_UNWIND_CONSOLIDATE;
catch_record.ExceptionFlags = EXCEPTION_NONCONTINUABLE;
catch_record.NumberParameters = 11;
catch_record.ExceptionInformation[0] = (ULONG_PTR)call_catch_block;
catch_record.ExceptionInformation[1] = orig_frame;
catch_record.ExceptionInformation[2] = (ULONG_PTR)descr;
catch_record.ExceptionInformation[3] = tryblock->start_level;
catch_record.ExceptionInformation[4] = (ULONG_PTR)rec;
catch_record.ExceptionInformation[5] = (ULONG_PTR)handler;
catch_record.ExceptionInformation[6] = (ULONG_PTR)untrans_rec;
catch_record.ExceptionInformation[7] = (ULONG_PTR)context;
catch_record.ExceptionInformation[10] = -1;
RtlUnwindEx((void*)frame, (void*)dispatch->ControlPc, &catch_record, NULL, &ctx, NULL);
}
TRACE("no matching catch block found\n");
data->processing_throw--;
}
static LONG CALLBACK se_translation_filter(EXCEPTION_POINTERS *ep, void *c)
{
se_translator_ctx *ctx = (se_translator_ctx *)c;
EXCEPTION_RECORD *rec = ep->ExceptionRecord;
cxx_exception_type *exc_type;
if (rec->ExceptionCode != CXX_EXCEPTION)
{
TRACE("non-c++ exception thrown in SEH handler: %lx\n", rec->ExceptionCode);
terminate();
}
exc_type = (cxx_exception_type *)rec->ExceptionInformation[2];
find_catch_block(rec, ep->ContextRecord, ctx->seh_rec, ctx->dest_frame, ctx->dispatch,
ctx->descr, exc_type, ctx->orig_frame);
__DestructExceptionObject(rec);
return ExceptionContinueSearch;
}
static void check_noexcept( PEXCEPTION_RECORD rec,
const cxx_function_descr *descr, BOOL nested )
{
if (!nested && rec->ExceptionCode == CXX_EXCEPTION &&
descr->magic >= CXX_FRAME_MAGIC_VC8 &&
(descr->flags & FUNC_DESCR_NOEXCEPT))
{
ERR("noexcept function propagating exception\n");
terminate();
}
}
static DWORD cxx_frame_handler(EXCEPTION_RECORD *rec, ULONG_PTR frame,
CONTEXT *context, DISPATCHER_CONTEXT *dispatch,
const cxx_function_descr *descr)
{
int trylevel = ip_to_state( descr, get_exception_pc(dispatch), dispatch->ImageBase );
cxx_exception_type *exc_type;
ULONG_PTR orig_frame = frame;
ULONG_PTR throw_base;
DWORD throw_func_off;
void *throw_func;
UINT i, j;
int unwindlevel = -1;
if (descr->magic<CXX_FRAME_MAGIC_VC6 || descr->magic>CXX_FRAME_MAGIC_VC8)
{
FIXME("unhandled frame magic %x\n", descr->magic);
return ExceptionContinueSearch;
}
if (descr->magic >= CXX_FRAME_MAGIC_VC8 &&
(descr->flags & FUNC_DESCR_SYNCHRONOUS) &&
(rec->ExceptionCode != CXX_EXCEPTION &&
!cxx_is_consolidate(rec) &&
rec->ExceptionCode != STATUS_LONGJUMP))
return ExceptionContinueSearch; /* handle only c++ exceptions */
/* update orig_frame if it's a nested exception */
throw_func_off = RtlLookupFunctionEntry(dispatch->ControlPc, &throw_base, NULL)->BeginAddress;
throw_func = rtti_rva(throw_func_off, throw_base);
TRACE("reconstructed handler pointer: %p\n", throw_func);
for (i=descr->tryblock_count; i>0; i--)
{
const tryblock_info *tryblock = rtti_rva(descr->tryblock, dispatch->ImageBase);
tryblock = &tryblock[i-1];
if (trylevel>tryblock->end_level && trylevel<=tryblock->catch_level)
{
for (j=0; j<tryblock->catchblock_count; j++)
{
const catchblock_info *catchblock = rtti_rva(tryblock->catchblock, dispatch->ImageBase);
catchblock = &catchblock[j];
if (rtti_rva(catchblock->handler, dispatch->ImageBase) == throw_func)
{
unwindlevel = tryblock->end_level;
#ifdef _WIN64
orig_frame = *(ULONG_PTR *)(frame + catchblock->frame);
#else
orig_frame = *(ULONG_PTR *)frame;
#endif
TRACE("nested exception detected, setting orig_frame to %Ix\n", orig_frame);
}
}
}
}
if (rec->ExceptionFlags & (EXCEPTION_UNWINDING|EXCEPTION_EXIT_UNWIND))
{
if (rec->ExceptionFlags & EXCEPTION_TARGET_UNWIND)
cxx_local_unwind(orig_frame, dispatch, descr,
cxx_is_consolidate(rec) ? rec->ExceptionInformation[3] : trylevel);
else
cxx_local_unwind(orig_frame, dispatch, descr, unwindlevel);
return ExceptionContinueSearch;
}
if (!descr->tryblock_count)
{
check_noexcept(rec, descr, orig_frame != frame);
return ExceptionContinueSearch;
}
if (rec->ExceptionCode == CXX_EXCEPTION &&
(!rec->ExceptionInformation[1] && !rec->ExceptionInformation[2]))
{
TRACE("rethrow detected.\n");
*rec = *msvcrt_get_thread_data()->exc_record;
}
if (rec->ExceptionCode == CXX_EXCEPTION)
{
exc_type = (cxx_exception_type *)rec->ExceptionInformation[2];
if (TRACE_ON(seh))
{
TRACE("handling C++ exception rec %p frame %Ix descr %p\n", rec, frame, descr);
TRACE_EXCEPTION_TYPE(exc_type, rec->ExceptionInformation[3]);
dump_function_descr(descr, dispatch->ImageBase);
}
}
else
{
thread_data_t *data = msvcrt_get_thread_data();
exc_type = NULL;
TRACE("handling C exception code %lx rec %p frame %Ix descr %p\n",
rec->ExceptionCode, rec, frame, descr);
if (data->se_translator) {
EXCEPTION_POINTERS except_ptrs;
se_translator_ctx ctx;
ctx.dest_frame = frame;
ctx.orig_frame = orig_frame;
ctx.seh_rec = rec;
ctx.dispatch = dispatch;
ctx.descr = descr;
__TRY
{
except_ptrs.ExceptionRecord = rec;
except_ptrs.ContextRecord = context;
data->se_translator(rec->ExceptionCode, &except_ptrs);
}
__EXCEPT_CTX(se_translation_filter, &ctx)
{
}
__ENDTRY
}
}
find_catch_block(rec, context, NULL, frame, dispatch, descr, exc_type, orig_frame);
check_noexcept(rec, descr, orig_frame != frame);
return ExceptionContinueSearch;
}
/*********************************************************************
* __CxxFrameHandler (MSVCRT.@)
*/
EXCEPTION_DISPOSITION CDECL __CxxFrameHandler( EXCEPTION_RECORD *rec, ULONG_PTR frame,
CONTEXT *context, DISPATCHER_CONTEXT *dispatch )
{
TRACE( "%p %Ix %p %p\n", rec, frame, context, dispatch );
return cxx_frame_handler( rec, frame, context, dispatch,
rtti_rva(*(UINT *)dispatch->HandlerData, dispatch->ImageBase) );
}
#endif /* __i386__ */
static BOOL WINAPI msvcrt_console_handler(DWORD ctrlType)
{
BOOL ret = FALSE;
switch (ctrlType)
{
case CTRL_C_EVENT:
if (sighandlers[SIGINT])
{
if (sighandlers[SIGINT] != SIG_IGN)
sighandlers[SIGINT](SIGINT);
ret = TRUE;
}
break;
}
return ret;
}
/*********************************************************************
* __pxcptinfoptrs (MSVCRT.@)
*/
void** CDECL __pxcptinfoptrs(void)
{
return (void**)&msvcrt_get_thread_data()->xcptinfo;
}
typedef void (CDECL *float_handler)(int, int);
/* The exception codes are actually NTSTATUS values */
static const struct
{
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 },
};
static LONG msvcrt_exception_filter(struct _EXCEPTION_POINTERS *except)
{
LONG ret = EXCEPTION_CONTINUE_SEARCH;
__sighandler_t handler;
if (!except || !except->ExceptionRecord)
return EXCEPTION_CONTINUE_SEARCH;
switch (except->ExceptionRecord->ExceptionCode)
{
case EXCEPTION_ACCESS_VIOLATION:
if ((handler = sighandlers[SIGSEGV]) != SIG_DFL)
{
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;
}
ret = EXCEPTION_CONTINUE_EXECUTION;
}
break;
/* According to msdn,
* 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)
{
if (handler != SIG_IGN)
{
EXCEPTION_POINTERS **ep = (EXCEPTION_POINTERS**)__pxcptinfoptrs(), *old_ep;
unsigned int i;
int float_signal = _FPE_INVALID;
sighandlers[SIGFPE] = SIG_DFL;
for (i = 0; i < ARRAY_SIZE(float_exception_map); i++)
{
if (float_exception_map[i].status ==
except->ExceptionRecord->ExceptionCode)
{
float_signal = float_exception_map[i].signal;
break;
}
}
old_ep = *ep;
*ep = except;
((float_handler)handler)(SIGFPE, float_signal);
*ep = old_ep;
}
ret = EXCEPTION_CONTINUE_EXECUTION;
}
break;
case EXCEPTION_ILLEGAL_INSTRUCTION:
case EXCEPTION_PRIV_INSTRUCTION:
if ((handler = sighandlers[SIGILL]) != SIG_DFL)
{
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;
}
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.@)
* 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;
TRACE("(%d, %p)\n", sig, func);
if (func == SIG_ERR) return SIG_ERR;
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:
ret = sighandlers[sig];
sighandlers[sig] = func;
break;
default:
ret = SIG_ERR;
}
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("(%08lx,%p)\n", ex, ptr);
/* I assume ptr->ExceptionRecord->ExceptionCode is the same as ex */
return msvcrt_exception_filter(ptr);
}
/*********************************************************************
* __CppXcptFilter (MSVCRT.@)
*/
int CDECL __CppXcptFilter(NTSTATUS ex, PEXCEPTION_POINTERS ptr)
{
/* only filter c++ exceptions */
if (ex != CXX_EXCEPTION) return EXCEPTION_CONTINUE_SEARCH;
return _XcptFilter(ex, ptr);
}
/*********************************************************************
* __CxxDetectRethrow (MSVCRT.@)
*/
BOOL CDECL __CxxDetectRethrow(PEXCEPTION_POINTERS ptrs)
{
PEXCEPTION_RECORD rec;
if (!ptrs)
return FALSE;
rec = ptrs->ExceptionRecord;
if (is_cxx_exception( rec ) && rec->ExceptionInformation[2])
{
ptrs->ExceptionRecord = msvcrt_get_thread_data()->exc_record;
return TRUE;
}
return (msvcrt_get_thread_data()->exc_record == rec);
}
/*********************************************************************
* __CxxExceptionFilter (MSVCRT.@)
*/
int CDECL __CxxExceptionFilter( EXCEPTION_POINTERS *ptrs, const type_info *ti, UINT flags, void **copy)
{
const cxx_type_info *type;
EXCEPTION_RECORD *rec;
uintptr_t exc_base;
TRACE( "%p %p %x %p\n", ptrs, ti, flags, copy );
if (!ptrs) return EXCEPTION_CONTINUE_SEARCH;
/* handle catch(...) */
if (!ti) return EXCEPTION_EXECUTE_HANDLER;
rec = ptrs->ExceptionRecord;
if (!is_cxx_exception( rec )) return EXCEPTION_CONTINUE_SEARCH;
if (rec->ExceptionInformation[1] == 0 && rec->ExceptionInformation[2] == 0)
{
rec = msvcrt_get_thread_data()->exc_record;
if (!rec) return EXCEPTION_CONTINUE_SEARCH;
}
exc_base = rec->ExceptionInformation[3];
type = find_caught_type( (cxx_exception_type *)rec->ExceptionInformation[2], exc_base, ti, flags );
if (!type) return EXCEPTION_CONTINUE_SEARCH;
if (copy) copy_exception( (void *)rec->ExceptionInformation[1], copy, flags, type, exc_base );
return EXCEPTION_EXECUTE_HANDLER;
}
/*********************************************************************
* __CxxQueryExceptionSize (MSVCRT.@)
*/
unsigned int CDECL __CxxQueryExceptionSize(void)
{
return sizeof(cxx_exception_type);
}
/*********************************************************************
* _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;
}
/*********************************************************************
* _fpieee_flt (MSVCRT.@)
*/
int __cdecl _fpieee_flt( __msvcrt_ulong code, EXCEPTION_POINTERS *ep,
int (__cdecl *handler)(_FPIEEE_RECORD*) )
{
switch (code)
{
case STATUS_FLOAT_DIVIDE_BY_ZERO:
case STATUS_FLOAT_INEXACT_RESULT:
case STATUS_FLOAT_INVALID_OPERATION:
case STATUS_FLOAT_OVERFLOW:
case STATUS_FLOAT_UNDERFLOW:
return handle_fpieee_flt( code, ep, handler );
default:
return EXCEPTION_CONTINUE_SEARCH;
}
}
#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 (!is_cxx_exception( rec )) return;
if (!info || !info->destructor)
return;
call_dtor( rtti_rva( info->destructor, rec->ExceptionInformation[3] ), object );
}
/*********************************************************************
* __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;
char 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 */
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