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ntdll: Create a separate heap for allocating memory views instead of using malloc.

This commit is contained in:
Alexandre Julliard 2008-10-31 13:00:59 +01:00
parent bb98004249
commit 222e406deb
2 changed files with 31 additions and 9 deletions
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2
dlls/ntdll/heap.c
View File

@ -1253,7 +1253,7 @@ HANDLE WINAPI RtlCreateHeap( ULONG flags, PVOID addr, SIZE_T totalSize, SIZE_T c
list_add_head( &processHeap->entry, &heapPtr->entry );
RtlLeaveCriticalSection( &processHeap->critSection );
}
else
else if (!addr)
{
processHeap = subheap->heap; /* assume the first heap we create is the process main heap */
list_init( &processHeap->entry );

38
dlls/ntdll/virtual.c
View File

@ -141,6 +141,9 @@ static void * const user_space_limit = 0; /* no limit needed on other platfo
#define VIRTUAL_DEBUG_DUMP_VIEW(view) \
do { if (TRACE_ON(virtual)) VIRTUAL_DumpView(view); } while (0)
#define VIRTUAL_HEAP_SIZE (4*1024*1024)
static HANDLE virtual_heap;
static void *preload_reserve_start;
static void *preload_reserve_end;
static int use_locks;
@ -401,7 +404,7 @@ static void delete_view( struct file_view *view ) /* [in] View */
if (!(view->flags & VFLAG_SYSTEM)) unmap_area( view->base, view->size );
list_remove( &view->entry );
if (view->mapping) NtClose( view->mapping );
free( view );
RtlFreeHeap( virtual_heap, 0, view );
}
@ -421,7 +424,11 @@ static NTSTATUS create_view( struct file_view **view_ret, void *base, size_t siz
/* Create the view structure */
if (!(view = malloc( sizeof(*view) + (size >> page_shift) - 1 ))) return STATUS_NO_MEMORY;
if (!(view = RtlAllocateHeap( virtual_heap, 0, sizeof(*view) + (size >> page_shift) - 1 )))
{
FIXME( "out of memory in virtual heap for %p-%p\n", base, (char *)base + size );
return STATUS_NO_MEMORY;
}
view->base = base;
view->size = size;
@ -1167,11 +1174,16 @@ static NTSTATUS map_image( HANDLE hmapping, int fd, char *base, SIZE_T total_siz
}
static int get_address_space_limit( void *base, size_t size, void *arg )
/* callback for wine_mmap_enum_reserved_areas to allocate space for the virtual heap */
static int alloc_virtual_heap( void *base, size_t size, void *arg )
{
void **limit = arg;
if ((char *)base + size > (char *)*limit) *limit = (char *)base + size;
return 1;
void **heap_base = arg;
if (address_space_limit) address_space_limit = max( (char *)address_space_limit, (char *)base + size );
if (size < VIRTUAL_HEAP_SIZE) return 0;
*heap_base = wine_anon_mmap( (char *)base + size - VIRTUAL_HEAP_SIZE,
VIRTUAL_HEAP_SIZE, PROT_READ|PROT_WRITE, MAP_FIXED );
return (*heap_base != (void *)-1);
}
/***********************************************************************
@ -1180,6 +1192,9 @@ static int get_address_space_limit( void *base, size_t size, void *arg )
void virtual_init(void)
{
const char *preload;
void *heap_base;
struct file_view *heap_view;
#ifndef page_mask
page_size = getpagesize();
page_mask = page_size - 1;
@ -1197,8 +1212,15 @@ void virtual_init(void)
preload_reserve_end = (void *)end;
}
}
if (address_space_limit)
wine_mmap_enum_reserved_areas( get_address_space_limit, &address_space_limit, 1 );
/* try to find space in a reserved area for the virtual heap */
if (!wine_mmap_enum_reserved_areas( alloc_virtual_heap, &heap_base, 1 ))
heap_base = wine_anon_mmap( NULL, VIRTUAL_HEAP_SIZE, PROT_READ|PROT_WRITE, 0 );
assert( heap_base != (void *)-1 );
virtual_heap = RtlCreateHeap( HEAP_NO_SERIALIZE, heap_base, VIRTUAL_HEAP_SIZE,
VIRTUAL_HEAP_SIZE, NULL, NULL );
create_view( &heap_view, heap_base, VIRTUAL_HEAP_SIZE, VPROT_COMMITTED | VPROT_READ | VPROT_WRITE );
}