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Repaired shared PE data sections.

This commit is contained in:
Alexandre Julliard 2001-04-13 22:38:39 +00:00
parent 4a85a45095
commit 84fdfd087a
3 changed files with 47 additions and 10 deletions
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6
server/file.c
View File

@ -181,6 +181,12 @@ static struct file *create_file( const char *nameptr, size_t len, unsigned int a
return NULL;
}
/* check if two file objects point to the same file */
int is_same_file( struct file *file1, struct file *file2 )
{
return !strcmp( file1->name, file2->name );
}
/* Create an anonymous Unix file */
int create_anonymous_file(void)
{

50
server/mapping.c
View File

@ -19,15 +19,17 @@
struct mapping
{
struct object obj; /* object header */
int size_high; /* mapping size */
int size_low; /* mapping size */
int protect; /* protection flags */
struct file *file; /* file mapped */
int header_size; /* size of headers (for PE image mapping) */
void *base; /* default base addr (for PE image mapping) */
struct file *shared_file; /* temp file for shared PE mapping */
int shared_size; /* shared mapping total size */
struct object obj; /* object header */
int size_high; /* mapping size */
int size_low; /* mapping size */
int protect; /* protection flags */
struct file *file; /* file mapped */
int header_size; /* size of headers (for PE image mapping) */
void *base; /* default base addr (for PE image mapping) */
struct file *shared_file; /* temp file for shared PE mapping */
int shared_size; /* shared mapping total size */
struct mapping *shared_next; /* next in shared PE mapping list */
struct mapping *shared_prev; /* prev in shared PE mapping list */
};
static int mapping_get_fd( struct object *obj );
@ -50,6 +52,8 @@ static const struct object_ops mapping_ops =
mapping_destroy /* destroy */
};
static struct mapping *shared_first;
#ifdef __i386__
/* These are always the same on an i386, and it will be faster this way */
@ -99,6 +103,17 @@ inline static int get_mmap_fd( struct file *file )
return obj->ops->get_fd( obj );
}
/* find the shared PE mapping for a given mapping */
static struct file *get_shared_file( struct mapping *mapping )
{
struct mapping *ptr;
for (ptr = shared_first; ptr; ptr = ptr->shared_next)
if (is_same_file( ptr->file, mapping->file ))
return (struct file *)grab_object( ptr->shared_file );
return NULL;
}
/* allocate and fill the temp file for a shared PE image mapping */
static int build_shared_mapping( struct mapping *mapping, int fd,
IMAGE_SECTION_HEADER *sec, int nb_sec )
@ -123,6 +138,8 @@ static int build_shared_mapping( struct mapping *mapping, int fd,
}
if (!(mapping->shared_size = total_size)) return 1; /* nothing to do */
if ((mapping->shared_file = get_shared_file( mapping ))) return 1;
/* create a temp file for the mapping */
if (!(mapping->shared_file = create_temp_file( GENERIC_READ|GENERIC_WRITE ))) goto error;
@ -185,6 +202,13 @@ static int get_image_params( struct mapping *mapping )
if (!build_shared_mapping( mapping, fd, sec, nt.FileHeader.NumberOfSections )) goto error;
if (mapping->shared_file) /* link it in the list */
{
if ((mapping->shared_next = shared_first)) shared_first->shared_prev = mapping;
mapping->shared_prev = NULL;
shared_first = mapping;
}
mapping->size_low = ROUND_SIZE( 0, nt.OptionalHeader.SizeOfImage );
mapping->size_high = 0;
mapping->base = (void *)nt.OptionalHeader.ImageBase;
@ -290,7 +314,13 @@ static void mapping_destroy( struct object *obj )
struct mapping *mapping = (struct mapping *)obj;
assert( obj->ops == &mapping_ops );
if (mapping->file) release_object( mapping->file );
if (mapping->shared_file) release_object( mapping->shared_file );
if (mapping->shared_file)
{
release_object( mapping->shared_file );
if (mapping->shared_next) mapping->shared_next->shared_prev = mapping->shared_prev;
if (mapping->shared_prev) mapping->shared_prev->shared_next = mapping->shared_next;
else shared_first = mapping->shared_next;
}
}
int get_page_size(void)

1
server/object.h
View File

@ -148,6 +148,7 @@ extern void abandon_mutexes( struct thread *thread );
extern struct file *get_file_obj( struct process *process, handle_t handle,
unsigned int access );
extern int is_same_file( struct file *file1, struct file *file2 );
extern int grow_file( struct file *file, int size_high, int size_low );
extern int create_anonymous_file(void);
extern struct file *create_temp_file( int access );