2 * assembly.c: Routines for loading assemblies.
5 * Miguel de Icaza (miguel@ximian.com)
7 * (C) 2001 Ximian, Inc. http://www.ximian.com
10 * Implement big-endian versions of the reading routines.
20 #include "rawbuffer.h"
22 #define CSIZE(x) (sizeof (x) / 4)
25 * keeps track of loaded assemblies
27 static GHashTable *assemblies;
30 * g_concat_dir_and_file:
31 * @dir: directory name
34 * returns a new allocated string that is the concatenation of dir and file,
35 * takes care of the exact details for concatenating them.
38 g_concat_dir_and_file (const char *dir, const char *file)
40 g_return_val_if_fail (dir != NULL, NULL);
41 g_return_val_if_fail (file != NULL, NULL);
44 * If the directory name doesn't have a / on the end, we need
45 * to add one so we get a proper path to the file
47 if (dir [strlen(dir) - 1] != G_DIR_SEPARATOR)
48 return g_strconcat (dir, G_DIR_SEPARATOR_S, file, NULL);
50 return g_strconcat (dir, file, NULL);
54 default_assembly_name_resolver (const char *name)
58 if ((strcmp (name, "mscorlib") == 0) ||
59 (strcmp (name, "mscorlib.dll") == 0) ||
60 (strcmp (name, "corlib.dll") == 0) ||
61 (strcmp (name, "corlib") == 0))
62 return g_concat_dir_and_file (MONO_ASSEMBLIES, CORLIB_NAME);
64 if (g_file_test (name, G_FILE_TEST_EXISTS))
65 return g_strdup (name);
66 path = g_concat_dir_and_file (MONO_ASSEMBLIES, name);
67 if (g_file_test (path, G_FILE_TEST_EXISTS))
68 return g_strdup (path);
70 file = g_strconcat (name, ".dll", NULL);
71 path = g_concat_dir_and_file (MONO_ASSEMBLIES, file);
79 * @filename: Opens the assembly pointed out by this name
80 * @resolver: A user provided function to resolve assembly references
81 * @status: where a status code can be returned
83 * mono_assembly_open opens the PE-image pointed by @filename, and
84 * loads any external assemblies referenced by it.
86 * NOTE: we could do lazy loading of the assemblies. Or maybe not worth
90 mono_assembly_open (const char *filename, MonoAssemblyResolverFn resolver,
91 enum MonoImageOpenStatus *status)
98 const char *basename = strrchr (filename, G_DIR_SEPARATOR);
99 static MonoAssembly *corlib;
101 g_return_val_if_fail (filename != NULL, NULL);
103 if (assemblies == NULL)
104 assemblies = g_hash_table_new (g_str_hash, g_str_equal);
106 if ((ass = g_hash_table_lookup (assemblies, filename)) != NULL){
111 if (basename == NULL)
116 if (resolver == NULL)
117 resolver = default_assembly_name_resolver;
120 fullname = resolver (filename);
121 image = mono_image_open (fullname, status);
125 *status = MONO_IMAGE_ERROR_ERRNO;
130 t = &image->tables [MONO_TABLE_ASSEMBLYREF];
132 image->references = g_new0 (MonoAssembly *, t->rows + 1);
135 * Create assembly struct, and enter it into the assembly cache
137 ass = g_new (MonoAssembly, 1);
138 ass->name = fullname;
141 g_hash_table_insert (assemblies, image->name, ass);
142 g_hash_table_insert (assemblies, ass->name, ass);
145 * Load any assemblies this image references
147 for (i = 0; i < t->rows; i++){
150 guint32 cols [MONO_ASSEMBLYREF_SIZE];
152 mono_metadata_decode_row (t, i, cols, CSIZE (cols));
153 name = mono_metadata_string_heap (image, cols [MONO_ASSEMBLYREF_NAME]);
156 * Special case until we have a passable corlib:
158 * ie, references to mscorlib from corlib.dll are ignored
159 * and we do not load corlib twice.
161 if (strcmp (basename, CORLIB_NAME) == 0){
165 if (strcmp (name, "mscorlib") == 0)
169 assembly_ref = (*resolver) (name);
171 image->references [i] = mono_assembly_open (assembly_ref, resolver, status);
173 if (image->references [i] == NULL){
176 for (j = 0; j < i; j++)
177 mono_assembly_close (image->references [j]);
178 g_free (image->references);
179 mono_image_close (image);
181 g_warning ("Could not find assembly %s %s", name, assembly_ref);
182 g_free (assembly_ref);
184 *status = MONO_IMAGE_MISSING_ASSEMBLYREF;
188 g_free (assembly_ref);
190 image->references [i] = NULL;
196 mono_assembly_close (MonoAssembly *assembly)
201 g_return_if_fail (assembly != NULL);
203 if (--assembly->ref_count != 0)
206 image = assembly->image;
207 for (i = 0; image->references [i] != NULL; i++)
208 mono_image_close (image->references [i]->image);
209 g_free (image->references);
211 mono_image_close (assembly->image);
213 g_hash_table_remove (assemblies, assembly->name);
215 g_free (assembly->name);
220 * Temporary hack until we get AppDomains
223 mono_get_assemblies ()