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Use server file mapping objects.

This commit is contained in:
Alexandre Julliard 1999-01-01 17:01:18 +00:00
parent a8b8d9c0f6
commit 881708cc2d
1 changed files with 84 additions and 53 deletions
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129
memory/virtual.c
View File

@ -20,6 +20,7 @@
#include "process.h"
#include "xmalloc.h"
#include "global.h"
#include "server.h"
#include "debug.h"
#ifndef MS_SYNC
@ -30,11 +31,7 @@
typedef struct
{
K32OBJ header;
DWORD size_high;
DWORD size_low;
FILE_OBJECT *file;
int unix_handle;
BYTE protect;
} FILE_MAPPING;
/* File view */
@ -46,22 +43,13 @@ typedef struct _FV
UINT32 size; /* Size in bytes */
UINT32 flags; /* Allocation flags */
UINT32 offset; /* Offset from start of mapped file */
FILE_MAPPING *mapping; /* File mapping */
HANDLE32 mapping; /* Handle to the file mapping */
HANDLERPROC handlerProc; /* Fault handler */
LPVOID handlerArg; /* Fault handler argument */
BYTE protect; /* Protection for all pages at allocation time */
BYTE prot[1]; /* Protection byte for each page */
} FILE_VIEW;
/* Per-page protection byte values */
#define VPROT_READ 0x01
#define VPROT_WRITE 0x02
#define VPROT_EXEC 0x04
#define VPROT_WRITECOPY 0x08
#define VPROT_GUARD 0x10
#define VPROT_NOCACHE 0x20
#define VPROT_COMMITTED 0x40
/* Per-view flags */
#define VFLAG_SYSTEM 0x01
@ -145,8 +133,8 @@ static void VIRTUAL_DumpView( FILE_VIEW *view )
DUMP( "View: %08x - %08x%s",
view->base, view->base + view->size - 1,
(view->flags & VFLAG_SYSTEM) ? " (system)" : "" );
if (view->mapping && view->mapping->file)
DUMP( " %s @ %08x\n", view->mapping->file->unix_name, view->offset );
if (view->mapping)
DUMP( " %d @ %08x\n", view->mapping, view->offset );
else
DUMP( " (anonymous)\n");
@ -212,7 +200,7 @@ static FILE_VIEW *VIRTUAL_FindView(
*/
static FILE_VIEW *VIRTUAL_CreateView( UINT32 base, UINT32 size, UINT32 offset,
UINT32 flags, BYTE vprot,
FILE_MAPPING *mapping )
HANDLE32 mapping )
{
FILE_VIEW *view, *prev;
@ -230,6 +218,17 @@ static FILE_VIEW *VIRTUAL_CreateView( UINT32 base, UINT32 size, UINT32 offset,
view->protect = vprot;
memset( view->prot, vprot, size );
/* Duplicate the mapping handle */
if ((view->mapping != -1) &&
!DuplicateHandle( GetCurrentProcess(), view->mapping,
GetCurrentProcess(), &view->mapping,
0, FALSE, DUPLICATE_SAME_ACCESS ))
{
free( view );
return NULL;
}
/* Insert it in the linked list */
if (!VIRTUAL_FirstView || (VIRTUAL_FirstView->base > base))
@ -267,7 +266,7 @@ static void VIRTUAL_DeleteView(
if (view->next) view->next->prev = view->prev;
if (view->prev) view->prev->next = view->next;
else VIRTUAL_FirstView = view->next;
if (view->mapping) K32OBJ_DecCount( &view->mapping->header );
if (view->mapping) CloseHandle( view->mapping );
free( view );
}
@ -473,7 +472,7 @@ BOOL32 VIRTUAL_Init(void)
if (x == 'x') vprot |= VPROT_EXEC;
if (p == 'p') vprot |= VPROT_WRITECOPY;
VIRTUAL_CreateView( start, end - start, 0,
VFLAG_SYSTEM, vprot, NULL );
VFLAG_SYSTEM, vprot, -1 );
}
close (fd);
}
@ -598,7 +597,7 @@ LPVOID WINAPI VirtualAlloc(
if ((type & MEM_RESERVE) || !base)
{
view_size = size + (base ? 0 : granularity_mask + 1);
ptr = (UINT32)FILE_dommap( NULL, -1, (LPVOID)base, 0, view_size, 0, 0,
ptr = (UINT32)FILE_dommap( -1, (LPVOID)base, 0, view_size, 0, 0,
VIRTUAL_GetUnixProt( vprot ), MAP_PRIVATE );
if (ptr == (UINT32)-1)
{
@ -627,7 +626,7 @@ LPVOID WINAPI VirtualAlloc(
SetLastError( ERROR_INVALID_ADDRESS );
return NULL;
}
if (!(view = VIRTUAL_CreateView( ptr, size, 0, 0, vprot, NULL )))
if (!(view = VIRTUAL_CreateView( ptr, size, 0, 0, vprot, -1 )))
{
FILE_munmap( (void *)ptr, 0, size );
SetLastError( ERROR_OUTOFMEMORY );
@ -1080,7 +1079,9 @@ HANDLE32 WINAPI CreateFileMapping32A(
LPCSTR name /* [in] Name of file-mapping object */ )
{
FILE_MAPPING *mapping = NULL;
int unix_handle = -1;
FILE_OBJECT *file;
struct create_mapping_request req;
struct create_mapping_reply reply = { -1 };
HANDLE32 handle;
BYTE vprot;
BOOL32 inherit = (sa && (sa->nLength>=sizeof(*sa)) && sa->bInheritHandle);
@ -1132,7 +1133,7 @@ HANDLE32 WINAPI CreateFileMapping32A(
SetLastError( ERROR_INVALID_PARAMETER );
return 0;
}
obj = NULL;
file = NULL;
if (name)
{
CHAR buf[260];
@ -1164,10 +1165,7 @@ HANDLE32 WINAPI CreateFileMapping32A(
((protect & 0xff) == PAGE_EXECUTE_READWRITE) ||
((protect & 0xff) == PAGE_EXECUTE_WRITECOPY))
access |= GENERIC_WRITE;
if (!(obj = HANDLE_GetObjPtr( PROCESS_Current(), hFile,
K32OBJ_FILE, access, NULL )))
goto error;
if ((unix_handle = FILE_GetUnixHandle( hFile, access )) == -1) goto error;
if (!(file = FILE_GetFile( hFile, access, &req.handle ))) goto error;
if (!GetFileInformationByHandle( hFile, &info )) goto error;
if (!size_high && !size_low)
{
@ -1184,28 +1182,36 @@ HANDLE32 WINAPI CreateFileMapping32A(
if (!SetEndOfFile( hFile )) goto error;
}
}
else req.handle = -1;
/* Create the server object */
req.size_high = size_high;
req.size_low = ROUND_SIZE( 0, size_low );
req.protect = vprot;
CLIENT_SendRequest( REQ_CREATE_MAPPING, -1, 2,
&req, sizeof(req),
name, name ? strlen(name) : 0 );
if (CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL ))
goto error;
/* Allocate the mapping object */
if (!(mapping = HeapAlloc( SystemHeap, 0, sizeof(*mapping) ))) goto error;
mapping->header.type = K32OBJ_MEM_MAPPED_FILE;
mapping->header.refcount = 1;
mapping->protect = vprot;
mapping->size_high = size_high;
mapping->size_low = ROUND_SIZE( 0, size_low );
mapping->file = (FILE_OBJECT *)obj;
mapping->unix_handle = unix_handle;
mapping->file = file;
if (!K32OBJ_AddName( &mapping->header, name )) handle = 0;
else handle = HANDLE_Alloc( PROCESS_Current(), &mapping->header,
FILE_MAP_ALL_ACCESS /*FIXME*/, inherit, -1 );
FILE_MAP_ALL_ACCESS /*FIXME*/, inherit, reply.handle );
K32OBJ_DecCount( &mapping->header );
SetLastError(0); /* Last error value is relevant. (see the start of fun) */
return handle;
error:
if (obj) K32OBJ_DecCount( obj );
if (unix_handle != -1) close( unix_handle );
if (reply.handle != -1) CLIENT_CloseHandle( reply.handle );
if (file) K32OBJ_DecCount( &file->header );
if (mapping) HeapFree( SystemHeap, 0, mapping );
return 0;
}
@ -1238,17 +1244,33 @@ HANDLE32 WINAPI CreateFileMapping32W( HFILE32 hFile, LPSECURITY_ATTRIBUTES attr,
HANDLE32 WINAPI OpenFileMapping32A(
DWORD access, /* [in] Access mode */
BOOL32 inherit, /* [in] Inherit flag */
LPCSTR name /* [in] Name of file-mapping object */
) {
LPCSTR name ) /* [in] Name of file-mapping object */
{
HANDLE32 handle = 0;
K32OBJ *obj;
struct open_named_obj_request req;
struct open_named_obj_reply reply;
int len = name ? strlen(name) + 1 : 0;
req.type = OPEN_MAPPING;
req.access = access;
req.inherit = inherit;
CLIENT_SendRequest( REQ_OPEN_NAMED_OBJ, -1, 2, &req, sizeof(req), name, len );
CLIENT_WaitSimpleReply( &reply, sizeof(reply), NULL );
if (reply.handle != -1)
{
SYSTEM_LOCK();
if ((obj = K32OBJ_FindNameType( name, K32OBJ_MEM_MAPPED_FILE )))
{
handle = HANDLE_Alloc( PROCESS_Current(), obj, access, inherit, -1 );
handle = HANDLE_Alloc( PROCESS_Current(), obj, access, inherit, reply.handle );
K32OBJ_DecCount( obj );
if (handle == INVALID_HANDLE_VALUE32)
handle = 0; /* must return 0 on failure, not -1 */
}
else CLIENT_CloseHandle( reply.handle );
SYSTEM_UNLOCK();
}
return handle;
}
@ -1277,7 +1299,6 @@ static void VIRTUAL_DestroyMapping( K32OBJ *ptr )
assert( ptr->type == K32OBJ_MEM_MAPPED_FILE );
if (mapping->file) K32OBJ_DecCount( &mapping->file->header );
if (mapping->unix_handle != -1) close( mapping->unix_handle );
ptr->type = K32OBJ_UNKNOWN;
HeapFree( SystemHeap, 0, mapping );
}
@ -1323,6 +1344,9 @@ LPVOID WINAPI MapViewOfFileEx(
FILE_VIEW *view;
UINT32 ptr = (UINT32)-1, size = 0;
int flags = MAP_PRIVATE;
int unix_handle = -1;
struct get_mapping_info_request req;
struct get_mapping_info_reply info;
/* Check parameters */
@ -1336,27 +1360,31 @@ LPVOID WINAPI MapViewOfFileEx(
if (!(mapping = (FILE_MAPPING *)HANDLE_GetObjPtr( PROCESS_Current(),
handle,
K32OBJ_MEM_MAPPED_FILE,
0 /* FIXME */, NULL )))
0 /* FIXME */, &req.handle )))
return NULL;
if (mapping->size_high || offset_high)
CLIENT_SendRequest( REQ_GET_MAPPING_INFO, -1, 1, &req, sizeof(req) );
if (CLIENT_WaitSimpleReply( &info, sizeof(info), &unix_handle ))
goto error;
if (info.size_high || offset_high)
ERR(virtual, "Offsets larger than 4Gb not supported\n");
if ((offset_low >= mapping->size_low) ||
(count > mapping->size_low - offset_low))
if ((offset_low >= info.size_low) ||
(count > info.size_low - offset_low))
{
SetLastError( ERROR_INVALID_PARAMETER );
goto error;
}
if (count) size = ROUND_SIZE( offset_low, count );
else size = mapping->size_low - offset_low;
else size = info.size_low - offset_low;
switch(access)
{
case FILE_MAP_ALL_ACCESS:
case FILE_MAP_WRITE:
case FILE_MAP_WRITE | FILE_MAP_READ:
if (!(mapping->protect & VPROT_WRITE))
if (!(info.protect & VPROT_WRITE))
{
SetLastError( ERROR_INVALID_PARAMETER );
goto error;
@ -1366,7 +1394,7 @@ LPVOID WINAPI MapViewOfFileEx(
case FILE_MAP_READ:
case FILE_MAP_COPY:
case FILE_MAP_COPY | FILE_MAP_READ:
if (mapping->protect & VPROT_READ) break;
if (info.protect & VPROT_READ) break;
/* fall through */
default:
SetLastError( ERROR_INVALID_PARAMETER );
@ -1378,9 +1406,9 @@ LPVOID WINAPI MapViewOfFileEx(
TRACE(virtual, "handle=%x size=%x offset=%lx\n",
handle, size, offset_low );
ptr = (UINT32)FILE_dommap( mapping->file, mapping->unix_handle,
ptr = (UINT32)FILE_dommap( unix_handle,
addr, 0, size, 0, offset_low,
VIRTUAL_GetUnixProt( mapping->protect ),
VIRTUAL_GetUnixProt( info.protect ),
flags );
if (ptr == (UINT32)-1) {
/* KB: Q125713, 25-SEP-1995, "Common File Mapping Problems and
@ -1397,14 +1425,17 @@ LPVOID WINAPI MapViewOfFileEx(
}
if (!(view = VIRTUAL_CreateView( ptr, size, offset_low, 0,
mapping->protect, mapping )))
info.protect, handle )))
{
SetLastError( ERROR_OUTOFMEMORY );
goto error;
}
if (unix_handle != -1) close( unix_handle );
K32OBJ_DecCount( &mapping->header );
return (LPVOID)ptr;
error:
if (unix_handle != -1) close( unix_handle );
if (ptr != (UINT32)-1) FILE_munmap( (void *)ptr, 0, size );
K32OBJ_DecCount( &mapping->header );
return NULL;