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Use vectored exceptions to get rid of VIRTUAL_SetFaultHandler().

This commit is contained in:
Dimitrie O. Paun 2005-04-20 16:24:13 +00:00 committed by Alexandre Julliard
parent 4b9f767845
commit 41c2482984
2 changed files with 78 additions and 22 deletions
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96
dlls/x11drv/dib.c
View File

@ -38,11 +38,25 @@
#include "winbase.h"
#include "wingdi.h"
#include "x11drv.h"
#include "excpt.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(bitmap);
WINE_DECLARE_DEBUG_CHANNEL(x11drv);
static struct list dibs_list = LIST_INIT(dibs_list);
static CRITICAL_SECTION dibs_cs;
static CRITICAL_SECTION_DEBUG dibs_cs_debug =
{
0, 0, &dibs_cs,
{ &dibs_cs_debug.ProcessLocksList, &dibs_cs_debug.ProcessLocksList },
0, 0, { 0, (DWORD)(__FILE__ ": dibs_cs") }
};
static CRITICAL_SECTION dibs_cs = { &dibs_cs_debug, -1, 0, 0, 0, 0 };
static PVOID dibs_handler;
static int ximageDepthTable[32];
/* This structure holds the arguments for DIB_SetImageBits() */
@ -4102,10 +4116,8 @@ INT X11DRV_GetDIBits( X11DRV_PDEVICE *physDev, HBITMAP hbitmap, UINT startscan,
static void X11DRV_DIB_DoProtectDIBSection( X_PHYSBITMAP *physBitmap, DWORD new_prot )
{
DWORD old_prot;
DIBSECTION dib;
GetObjectW( physBitmap->hbitmap, sizeof(dib), &dib );
VirtualProtect(dib.dsBm.bmBits, dib.dsBmih.biSizeImage, new_prot, &old_prot);
VirtualProtect(physBitmap->base, physBitmap->size, new_prot, &old_prot);
TRACE("Changed protection from %ld to %ld\n", old_prot, new_prot);
}
@ -4268,22 +4280,43 @@ static void X11DRV_DIB_DoUpdateDIBSection(X_PHYSBITMAP *physBitmap, BOOL toDIB)
/***********************************************************************
* X11DRV_DIB_FaultHandler
*/
static BOOL X11DRV_DIB_FaultHandler( LPVOID res, LPCVOID addr )
static LONG CALLBACK X11DRV_DIB_FaultHandler( PEXCEPTION_POINTERS ep )
{
X_PHYSBITMAP *physBitmap = res;
INT state = X11DRV_DIB_Lock( physBitmap, DIB_Status_None, FALSE );
X_PHYSBITMAP *physBitmap = NULL;
BOOL found = FALSE;
const BYTE *addr;
struct list *ptr;
if (state != DIB_Status_InSync) {
/* no way to tell whether app needs read or write yet,
* try read first */
X11DRV_DIB_Coerce( physBitmap, DIB_Status_InSync, FALSE );
} else {
/* hm, apparently the app must have write access */
X11DRV_DIB_Coerce( physBitmap, DIB_Status_AppMod, FALSE );
}
X11DRV_DIB_Unlock( physBitmap, TRUE );
if (ep->ExceptionRecord->ExceptionCode != EXCEPTION_ACCESS_VIOLATION)
return EXCEPTION_CONTINUE_SEARCH;
return TRUE;
addr = (const BYTE*)ep->ExceptionRecord->ExceptionInformation[1];
EnterCriticalSection(&dibs_cs);
LIST_FOR_EACH( ptr, &dibs_list )
{
physBitmap = LIST_ENTRY( ptr, X_PHYSBITMAP, entry );
if ((physBitmap->base <= addr) && (addr < physBitmap->base + physBitmap->size))
{
found = TRUE;
break;
}
}
LeaveCriticalSection(&dibs_cs);
if (!found) return EXCEPTION_CONTINUE_SEARCH;
X11DRV_DIB_Lock( physBitmap, DIB_Status_None, FALSE );
if (ep->ExceptionRecord->ExceptionInformation[0]) {
/* the app tried to write the DIB bits */
X11DRV_DIB_Coerce( physBitmap, DIB_Status_AppMod, FALSE );
} else {
/* the app tried to read the DIB bits */
X11DRV_DIB_Coerce( physBitmap, DIB_Status_InSync, FALSE );
}
X11DRV_DIB_Unlock( physBitmap, TRUE );
return EXCEPTION_CONTINUE_EXECUTION;
}
/***********************************************************************
@ -4566,7 +4599,6 @@ static XImage *X11DRV_XShmCreateImage( int width, int height, int bpp,
HBITMAP X11DRV_CreateDIBSection( X11DRV_PDEVICE *physDev, HBITMAP hbitmap,
const BITMAPINFO *bmi, UINT usage )
{
extern BOOL VIRTUAL_SetFaultHandler(LPCVOID addr, BOOL (*proc)(LPVOID, LPCVOID), LPVOID arg);
X_PHYSBITMAP *physBitmap;
DIBSECTION dib;
@ -4602,11 +4634,18 @@ HBITMAP X11DRV_CreateDIBSection( X11DRV_PDEVICE *physDev, HBITMAP hbitmap,
/* install fault handler */
InitializeCriticalSection( &physBitmap->lock );
if (VIRTUAL_SetFaultHandler(dib.dsBm.bmBits, X11DRV_DIB_FaultHandler, physBitmap))
{
X11DRV_DIB_DoProtectDIBSection( physBitmap, PAGE_READWRITE );
physBitmap->status = DIB_Status_AppMod;
}
physBitmap->base = dib.dsBm.bmBits;
physBitmap->size = dib.dsBmih.biSizeImage;
physBitmap->status = DIB_Status_AppMod;
if (!dibs_handler)
dibs_handler = AddVectoredExceptionHandler( TRUE, X11DRV_DIB_FaultHandler );
EnterCriticalSection( &dibs_cs );
list_add_head( &dibs_list, &physBitmap->entry );
LeaveCriticalSection( &dibs_cs );
X11DRV_DIB_DoProtectDIBSection( physBitmap, PAGE_READWRITE );
return hbitmap;
}
@ -4616,6 +4655,19 @@ HBITMAP X11DRV_CreateDIBSection( X11DRV_PDEVICE *physDev, HBITMAP hbitmap,
*/
void X11DRV_DIB_DeleteDIBSection(X_PHYSBITMAP *physBitmap, DIBSECTION *dib)
{
BOOL last;
EnterCriticalSection( &dibs_cs );
list_remove( &physBitmap->entry );
last = list_empty( &dibs_list );
LeaveCriticalSection( &dibs_cs );
if (last)
{
RemoveVectoredExceptionHandler( dibs_handler );
dibs_handler = NULL;
}
if (dib->dshSection)
X11DRV_DIB_Coerce(physBitmap, DIB_Status_InSync, FALSE);

4
dlls/x11drv/x11drv.h
View File

@ -64,6 +64,7 @@ typedef int Status;
#include "winuser.h"
#include "ddrawi.h"
#include "thread.h"
#include "wine/list.h"
#define MAX_PIXELFORMATS 8
@ -111,6 +112,9 @@ typedef struct
#ifdef HAVE_LIBXXSHM
XShmSegmentInfo shminfo; /* shared memory segment info */
#endif
struct list entry; /* Entry in global DIB list */
const BYTE *base; /* Base address */
SIZE_T size; /* Size in bytes */
} X_PHYSBITMAP;
/* X physical font */