-/*
- * file-mmap-posix.c: File mmap internal calls
+/**
+ * \file
+ * File mmap internal calls
*
* Author:
* Rodrigo Kumpera
*
* Copyright 2014 Xamarin Inc (http://www.xamarin.com)
+ * Licensed under the MIT license. See LICENSE file in the project root for full license information.
*/
#include <config.h>
#include <mono/metadata/object.h>
-#include <mono/metadata/file-io.h>
+#include <mono/metadata/w32file.h>
#include <mono/metadata/file-mmap.h>
#include <mono/utils/atomic.h>
#include <mono/utils/mono-memory-model.h>
COULD_NOT_OPEN,
CAPACITY_MUST_BE_POSITIVE,
INVALID_FILE_MODE,
- COULD_NOT_MAP_MEMORY
+ COULD_NOT_MAP_MEMORY,
+ ACCESS_DENIED,
+ CAPACITY_LARGER_THAN_LOGICAL_ADDRESS_SPACE
};
enum {
XXX implement options
*/
static void*
-open_file_map (MonoString *path, int input_fd, int mode, gint64 *capacity, int access, int options, int *error)
+open_file_map (const char *c_path, int input_fd, int mode, gint64 *capacity, int access, int options, int *ioerror)
{
struct stat buf;
- char *c_path = path ? mono_string_to_utf8 (path) : NULL;
MmapHandle *handle = NULL;
int result, fd;
- if (path)
+ if (c_path)
result = stat (c_path, &buf);
else
result = fstat (input_fd, &buf);
if (mode == FILE_MODE_TRUNCATE || mode == FILE_MODE_APPEND || mode == FILE_MODE_OPEN) {
if (result == -1) { //XXX translate errno?
- *error = FILE_NOT_FOUND;
+ *ioerror = FILE_NOT_FOUND;
goto done;
}
}
if (mode == FILE_MODE_CREATE_NEW && result == 0) {
- *error = FILE_ALREADY_EXISTS;
+ *ioerror = FILE_ALREADY_EXISTS;
goto done;
}
* also makes little sense, so don't do the check if th file is one of these.
*/
if (buf.st_size == 0 && !is_special_zero_size_file (&buf)) {
- *error = CAPACITY_SMALLER_THAN_FILE_SIZE;
+ *ioerror = CAPACITY_SMALLER_THAN_FILE_SIZE;
goto done;
}
*capacity = buf.st_size;
} else if (*capacity < buf.st_size) {
- *error = CAPACITY_SMALLER_THAN_FILE_SIZE;
+ *ioerror = CAPACITY_SMALLER_THAN_FILE_SIZE;
goto done;
}
} else {
if (mode == FILE_MODE_CREATE_NEW && *capacity == 0) {
- *error = CAPACITY_SMALLER_THAN_FILE_SIZE;
+ *ioerror = CAPACITY_SMALLER_THAN_FILE_SIZE;
goto done;
}
}
- if (path) //FIXME use io portability?
+ if (c_path) //FIXME use io portability?
fd = open (c_path, file_mode_to_unix (mode) | access_mode_to_unix (access), DEFAULT_FILEMODE);
else
fd = dup (input_fd);
if (fd == -1) { //XXX translate errno?
- *error = COULD_NOT_OPEN;
+ *ioerror = COULD_NOT_OPEN;
goto done;
}
handle->fd = fd;
done:
- g_free (c_path);
return (void*)handle;
}
#define MONO_ANON_FILE_TEMPLATE "/mono.anonmap.XXXXXXXXX"
static void*
-open_memory_map (MonoString *mapName, int mode, gint64 *capacity, int access, int options, int *error)
+open_memory_map (const char *c_mapName, int mode, gint64 *capacity, int access, int options, int *ioerror)
{
- char *c_mapName;
MmapHandle *handle;
- if (*capacity <= 1) {
- *error = CAPACITY_MUST_BE_POSITIVE;
+ if (*capacity <= 0 && mode != FILE_MODE_OPEN) {
+ *ioerror = CAPACITY_MUST_BE_POSITIVE;
+ return NULL;
+ }
+#if SIZEOF_VOID_P == 4
+ if (*capacity > UINT32_MAX) {
+ *ioerror = CAPACITY_LARGER_THAN_LOGICAL_ADDRESS_SPACE;
return NULL;
}
+#endif
if (!(mode == FILE_MODE_CREATE_NEW || mode == FILE_MODE_OPEN_OR_CREATE || mode == FILE_MODE_OPEN)) {
- *error = INVALID_FILE_MODE;
+ *ioerror = INVALID_FILE_MODE;
return NULL;
}
- c_mapName = mono_string_to_utf8 (mapName);
-
named_regions_lock ();
handle = (MmapHandle*)g_hash_table_lookup (named_regions, c_mapName);
if (handle) {
if (mode == FILE_MODE_CREATE_NEW) {
- *error = FILE_ALREADY_EXISTS;
+ *ioerror = FILE_ALREADY_EXISTS;
goto done;
}
int unused G_GNUC_UNUSED, alloc_size;
if (mode == FILE_MODE_OPEN) {
- *error = FILE_NOT_FOUND;
+ *ioerror = FILE_NOT_FOUND;
goto done;
}
*capacity = align_up_to_page_size (*capacity);
tmp_dir = g_get_tmp_dir ();
alloc_size = strlen (tmp_dir) + strlen (MONO_ANON_FILE_TEMPLATE) + 1;
if (alloc_size > 1024) {//rather fail that stack overflow
- *error = COULD_NOT_MAP_MEMORY;
+ *ioerror = COULD_NOT_MAP_MEMORY;
goto done;
}
file_name = (char *)alloca (alloc_size);
fd = mkstemp (file_name);
if (fd == -1) {
- *error = COULD_NOT_MAP_MEMORY;
+ *ioerror = COULD_NOT_MAP_MEMORY;
goto done;
}
done:
named_regions_unlock ();
- g_free (c_mapName);
return handle;
}
+/* This is an icall */
void *
-mono_mmap_open_file (MonoString *path, int mode, MonoString *mapName, gint64 *capacity, int access, int options, int *error)
+mono_mmap_open_file (MonoString *path, int mode, MonoString *mapName, gint64 *capacity, int access, int options, int *ioerror)
{
+ MonoError error;
+ MmapHandle *handle = NULL;
g_assert (path || mapName);
- if (!mapName)
- return open_file_map (path, -1, mode, capacity, access, options, error);
+ if (!mapName) {
+ char * c_path = mono_string_to_utf8_checked (path, &error);
+ if (mono_error_set_pending_exception (&error))
+ return NULL;
+ handle = open_file_map (c_path, -1, mode, capacity, access, options, ioerror);
+ g_free (c_path);
+ return handle;
+ }
- if (path) {
- MmapHandle *handle;
- char *c_mapName = mono_string_to_utf8 (mapName);
+ char *c_mapName = mono_string_to_utf8_checked (mapName, &error);
+ if (mono_error_set_pending_exception (&error))
+ return NULL;
+ if (path) {
named_regions_lock ();
handle = (MmapHandle*)g_hash_table_lookup (named_regions, c_mapName);
if (handle) {
- *error = FILE_ALREADY_EXISTS;
+ *ioerror = FILE_ALREADY_EXISTS;
handle = NULL;
} else {
- handle = (MmapHandle *)open_file_map (path, -1, mode, capacity, access, options, error);
- if (handle) {
- handle->name = g_strdup (c_mapName);
- g_hash_table_insert (named_regions, handle->name, handle);
+ char *c_path = mono_string_to_utf8_checked (path, &error);
+ if (is_ok (&error)) {
+ handle = (MmapHandle *)open_file_map (c_path, -1, mode, capacity, access, options, ioerror);
+ if (handle) {
+ handle->name = g_strdup (c_mapName);
+ g_hash_table_insert (named_regions, handle->name, handle);
+ }
+ } else {
+ handle = NULL;
}
+ g_free (c_path);
}
named_regions_unlock ();
+ } else
+ handle = open_memory_map (c_mapName, mode, capacity, access, options, ioerror);
- g_free (c_mapName);
- return handle;
- }
-
- return open_memory_map (mapName, mode, capacity, access, options, error);
+ g_free (c_mapName);
+ return handle;
}
+/* this is an icall */
void *
-mono_mmap_open_handle (void *input_fd, MonoString *mapName, gint64 *capacity, int access, int options, int *error)
+mono_mmap_open_handle (void *input_fd, MonoString *mapName, gint64 *capacity, int access, int options, int *ioerror)
{
+ MonoError error;
MmapHandle *handle;
if (!mapName) {
- handle = (MmapHandle *)open_file_map (NULL, GPOINTER_TO_INT (input_fd), FILE_MODE_OPEN, capacity, access, options, error);
+ handle = (MmapHandle *)open_file_map (NULL, GPOINTER_TO_INT (input_fd), FILE_MODE_OPEN, capacity, access, options, ioerror);
} else {
- char *c_mapName = mono_string_to_utf8 (mapName);
+ char *c_mapName = mono_string_to_utf8_checked (mapName, &error);
+ if (mono_error_set_pending_exception (&error))
+ return NULL;
named_regions_lock ();
handle = (MmapHandle*)g_hash_table_lookup (named_regions, c_mapName);
if (handle) {
- *error = FILE_ALREADY_EXISTS;
+ *ioerror = FILE_ALREADY_EXISTS;
handle = NULL;
} else {
//XXX we're exploiting wapi HANDLE == FD equivalence. THIS IS FRAGILE, create a _wapi_handle_to_fd call
- handle = (MmapHandle *)open_file_map (NULL, GPOINTER_TO_INT (input_fd), FILE_MODE_OPEN, capacity, access, options, error);
+ handle = (MmapHandle *)open_file_map (NULL, GPOINTER_TO_INT (input_fd), FILE_MODE_OPEN, capacity, access, options, ioerror);
handle->name = g_strdup (c_mapName);
g_hash_table_insert (named_regions, handle->name, handle);
}
struct stat buf = { 0 };
fstat (fh->fd, &buf); //FIXME error handling
+ *mmap_handle = NULL;
+ *base_address = NULL;
+
if (offset > buf.st_size || ((eff_size + offset) > buf.st_size && !is_special_zero_size_file (&buf)))
- goto error;
+ return ACCESS_DENIED;
/**
* We use the file size if one of the following conditions is true:
* -input size is zero
return 0;
}
-error:
- *mmap_handle = NULL;
- *base_address = NULL;
return COULD_NOT_MAP_MEMORY;
}
projects / mono.git / blobdiff