/* * assembly.c: Routines for loading assemblies. * * Author: * Miguel de Icaza (miguel@ximian.com) * * (C) 2001 Ximian, Inc. http://www.ximian.com * */ #include #include #include #include #include #include #include "assembly.h" #include "image.h" #include "cil-coff.h" #include "rawbuffer.h" #include #include #include #include #include #include #include #include #include #ifdef PLATFORM_WIN32 #include #ifdef _MSC_VER /* not used on Windows - see mono_set_rootdir () */ #define MONO_ASSEMBLIES NULL #endif #endif /* AssemblyVersionMap: an assembly name and the assembly version set on which it is based */ typedef struct { const char* assembly_name; guint8 version_set_index; } AssemblyVersionMap; /* the default search path is just MONO_ASSEMBLIES */ static const char* default_path [] = { MONO_ASSEMBLIES, NULL }; /* Contains the list of directories to be searched for assemblies (MONO_PATH) */ static char **assemblies_path = NULL; /* Contains the list of directories that point to auxiliary GACs */ static char **extra_gac_paths = NULL; /* The list of system assemblies what will be remapped to the running * runtime version. WARNING: this list must be sorted. */ static const AssemblyVersionMap framework_assemblies [] = { {"Accessibility", 0}, {"Commons.Xml.Relaxng", 0}, {"I18N", 0}, {"I18N.CJK", 0}, {"I18N.MidEast", 0}, {"I18N.Other", 0}, {"I18N.Rare", 0}, {"I18N.West", 0}, {"Microsoft.VisualBasic", 1}, {"Microsoft.VisualC", 1}, {"Mono.Cairo", 0}, {"Mono.CompilerServices.SymbolWriter", 0}, {"Mono.Data", 0}, {"Mono.Data.SqliteClient", 0}, {"Mono.Data.SybaseClient", 0}, {"Mono.Data.Tds", 0}, {"Mono.Data.TdsClient", 0}, {"Mono.GetOptions", 0}, {"Mono.Http", 0}, {"Mono.Posix", 0}, {"Mono.Security", 0}, {"Mono.Security.Win32", 0}, {"Mono.Xml.Ext", 0}, {"Novell.Directory.Ldap", 0}, {"Npgsql", 0}, {"PEAPI", 0}, {"System", 0}, {"System.Configuration.Install", 0}, {"System.Data", 0}, {"System.Data.OracleClient", 0}, {"System.Data.SqlXml", 0}, {"System.Design", 0}, {"System.DirectoryServices", 0}, {"System.Drawing", 0}, {"System.Drawing.Design", 0}, {"System.EnterpriseServices", 0}, {"System.Management", 0}, {"System.Messaging", 0}, {"System.Runtime.Remoting", 0}, {"System.Runtime.Serialization.Formatters.Soap", 0}, {"System.Security", 0}, {"System.ServiceProcess", 0}, {"System.Web", 0}, {"System.Web.Mobile", 0}, {"System.Web.Services", 0}, {"System.Windows.Forms", 0}, {"System.Xml", 0}, {"mscorlib", 0} }; /* * keeps track of loaded assemblies */ static GList *loaded_assemblies = NULL; static MonoAssembly *corlib; /* This protects loaded_assemblies and image->references */ static CRITICAL_SECTION assemblies_mutex; /* A hastable of thread->assembly list mappings */ static GHashTable *assemblies_loading; /* A hashtable of reflection only load thread->assemblies mappings */ static GHashTable *assemblies_refonly_loading; /* If defined, points to the bundled assembly information */ const MonoBundledAssembly **bundles; /* Reflection only private hook functions */ static MonoAssembly* mono_assembly_refonly_invoke_search_hook (MonoAssemblyName *aname); static gchar* encode_public_tok (const guchar *token, gint32 len) { const static gchar allowed [] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' }; gchar *res; int i; res = g_malloc (len * 2 + 1); for (i = 0; i < len; i++) { res [i * 2] = allowed [token [i] >> 4]; res [i * 2 + 1] = allowed [token [i] & 0xF]; } res [len * 2] = 0; return res; } static void check_path_env (void) { const char *path; char **splitted; path = g_getenv ("MONO_PATH"); if (!path) return; splitted = g_strsplit (path, G_SEARCHPATH_SEPARATOR_S, 1000); if (assemblies_path) g_strfreev (assemblies_path); assemblies_path = splitted; if (g_getenv ("MONO_DEBUG") == NULL) return; while (*splitted) { if (**splitted && !g_file_test (*splitted, G_FILE_TEST_IS_DIR)) g_warning ("'%s' in MONO_PATH doesn't exist or has wrong permissions.", *splitted); splitted++; } } static void check_extra_gac_path_env (void) { const char *path; char **splitted; path = g_getenv ("MONO_GAC_PREFIX"); if (!path) return; splitted = g_strsplit (path, G_SEARCHPATH_SEPARATOR_S, 1000); if (extra_gac_paths) g_strfreev (extra_gac_paths); extra_gac_paths = splitted; if (g_getenv ("MONO_DEBUG") == NULL) return; while (*splitted) { if (**splitted && !g_file_test (*splitted, G_FILE_TEST_IS_DIR)) g_warning ("'%s' in MONO_GAC_PATH doesn't exist or has wrong permissions.", *splitted); splitted++; } } gboolean mono_assembly_names_equal (MonoAssemblyName *l, MonoAssemblyName *r) { if (!l->name || !r->name) return FALSE; if (strcmp (l->name, r->name)) return FALSE; if (l->culture && r->culture && strcmp (l->culture, r->culture)) return FALSE; if (l->major != r->major || l->minor != r->minor || l->build != r->build || l->revision != r->revision) if (! ((l->major == 0 && l->minor == 0 && l->build == 0 && l->revision == 0) || (r->major == 0 && r->minor == 0 && r->build == 0 && r->revision == 0))) return FALSE; if (!l->public_key_token [0] || !r->public_key_token [0]) return TRUE; if (strcmp (l->public_key_token, r->public_key_token)) return FALSE; return TRUE; } static MonoAssembly* search_loaded (MonoAssemblyName* aname, gboolean refonly) { GList *tmp; MonoAssembly *ass; GList *loading; ass = refonly ? mono_assembly_refonly_invoke_search_hook (aname) : mono_assembly_invoke_search_hook (aname); if (ass) return ass; /* * The assembly might be under load by this thread. In this case, it is * safe to return an incomplete instance to prevent loops. */ loading = g_hash_table_lookup (refonly ? assemblies_refonly_loading : assemblies_loading, GetCurrentThread ()); for (tmp = loading; tmp; tmp = tmp->next) { ass = tmp->data; if (!mono_assembly_names_equal (aname, &ass->aname)) continue; return ass; } return NULL; } static MonoAssembly * load_in_path (const char *basename, const char** search_path, MonoImageOpenStatus *status, MonoBoolean refonly) { int i; char *fullpath; MonoAssembly *result; for (i = 0; search_path [i]; ++i) { fullpath = g_build_filename (search_path [i], basename, NULL); result = mono_assembly_open_full (fullpath, status, refonly); g_free (fullpath); if (result) return result; } return NULL; } /** * mono_assembly_setrootdir: * @root_dir: The pathname of the root directory where we will locate assemblies * * This routine sets the internal default root directory for looking up * assemblies. This is used by Windows installations to compute dynamically * the place where the Mono assemblies are located. * */ void mono_assembly_setrootdir (const char *root_dir) { /* * Override the MONO_ASSEMBLIES directory configured at compile time. */ /* Leak if called more than once */ default_path [0] = g_strdup (root_dir); } G_CONST_RETURN gchar * mono_assembly_getrootdir (void) { return default_path [0]; } /** * mono_assemblies_init: * * Initialize global variables used by this module. */ void mono_assemblies_init (void) { #ifdef PLATFORM_WIN32 mono_set_rootdir (); #endif check_path_env (); check_extra_gac_path_env (); InitializeCriticalSection (&assemblies_mutex); assemblies_loading = g_hash_table_new (NULL, NULL); assemblies_refonly_loading = g_hash_table_new (NULL, NULL); } gboolean mono_assembly_fill_assembly_name (MonoImage *image, MonoAssemblyName *aname) { MonoTableInfo *t = &image->tables [MONO_TABLE_ASSEMBLY]; guint32 cols [MONO_ASSEMBLY_SIZE]; if (!t->rows) return FALSE; mono_metadata_decode_row (t, 0, cols, MONO_ASSEMBLY_SIZE); aname->hash_len = 0; aname->hash_value = NULL; aname->name = mono_metadata_string_heap (image, cols [MONO_ASSEMBLY_NAME]); aname->culture = mono_metadata_string_heap (image, cols [MONO_ASSEMBLY_CULTURE]); aname->flags = cols [MONO_ASSEMBLY_FLAGS]; aname->major = cols [MONO_ASSEMBLY_MAJOR_VERSION]; aname->minor = cols [MONO_ASSEMBLY_MINOR_VERSION]; aname->build = cols [MONO_ASSEMBLY_BUILD_NUMBER]; aname->revision = cols [MONO_ASSEMBLY_REV_NUMBER]; aname->hash_alg = cols [MONO_ASSEMBLY_HASH_ALG]; if (cols [MONO_ASSEMBLY_PUBLIC_KEY]) { gchar* token = g_malloc (8); gchar* encoded; int len; aname->public_key = mono_metadata_blob_heap (image, cols [MONO_ASSEMBLY_PUBLIC_KEY]); len = mono_metadata_decode_blob_size (aname->public_key, (const char**)&aname->public_key); mono_digest_get_public_token (token, aname->public_key, len); encoded = encode_public_tok (token, 8); g_strlcpy (aname->public_key_token, encoded, MONO_PUBLIC_KEY_TOKEN_LENGTH); g_free (encoded); g_free (token); } else { aname->public_key = NULL; memset (aname->public_key_token, 0, MONO_PUBLIC_KEY_TOKEN_LENGTH); } if (cols [MONO_ASSEMBLY_PUBLIC_KEY]) { aname->public_key = mono_metadata_blob_heap (image, cols [MONO_ASSEMBLY_PUBLIC_KEY]); } else aname->public_key = 0; return TRUE; } static gchar* assemblyref_public_tok (MonoImage *image, guint32 key_index, guint32 flags) { const gchar *public_tok; int len; public_tok = mono_metadata_blob_heap (image, key_index); len = mono_metadata_decode_blob_size (public_tok, &public_tok); if (flags & ASSEMBLYREF_FULL_PUBLIC_KEY_FLAG) { gchar token [8]; mono_digest_get_public_token (token, public_tok, len); return encode_public_tok (token, 8); } return encode_public_tok (public_tok, len); } void mono_assembly_addref (MonoAssembly *assembly) { InterlockedIncrement (&assembly->ref_count); } static MonoAssemblyName * mono_assembly_remap_version (MonoAssemblyName *aname, MonoAssemblyName *dest_aname) { const MonoRuntimeInfo *current_runtime; int pos, first, last; if (aname->name == NULL) return aname; current_runtime = mono_get_runtime_info (); first = 0; last = G_N_ELEMENTS (framework_assemblies) - 1; while (first <= last) { int res; pos = first + (last - first) / 2; res = strcmp (aname->name, framework_assemblies[pos].assembly_name); if (res == 0) { const AssemblyVersionSet* vset; int index = framework_assemblies[pos].version_set_index; g_assert (index < G_N_ELEMENTS (current_runtime->version_sets)); vset = ¤t_runtime->version_sets [index]; if (aname->major == vset->major && aname->minor == vset->minor && aname->build == vset->build && aname->revision == vset->revision) return aname; if ((aname->major | aname->minor | aname->build | aname->revision) != 0) mono_trace (G_LOG_LEVEL_WARNING, MONO_TRACE_ASSEMBLY, "The request to load the assembly %s v%d.%d.%d.%d was remapped to v%d.%d.%d.%d", aname->name, aname->major, aname->minor, aname->build, aname->revision, vset->major, vset->minor, vset->build, vset->revision ); memcpy (dest_aname, aname, sizeof(MonoAssemblyName)); dest_aname->major = vset->major; dest_aname->minor = vset->minor; dest_aname->build = vset->build; dest_aname->revision = vset->revision; return dest_aname; } else if (res < 0) { last = pos - 1; } else { first = pos + 1; } } return aname; } void mono_assembly_load_reference (MonoImage *image, int index) { MonoTableInfo *t; guint32 cols [MONO_ASSEMBLYREF_SIZE]; const char *hash; MonoAssembly *reference; MonoAssemblyName aname; MonoImageOpenStatus status; /* * image->references is shared between threads, so we need to access * it inside a critical section. */ EnterCriticalSection (&assemblies_mutex); reference = image->references [index]; LeaveCriticalSection (&assemblies_mutex); if (reference) return; t = &image->tables [MONO_TABLE_ASSEMBLYREF]; mono_metadata_decode_row (t, index, cols, MONO_ASSEMBLYREF_SIZE); hash = mono_metadata_blob_heap (image, cols [MONO_ASSEMBLYREF_HASH_VALUE]); aname.hash_len = mono_metadata_decode_blob_size (hash, &hash); aname.hash_value = hash; aname.name = mono_metadata_string_heap (image, cols [MONO_ASSEMBLYREF_NAME]); aname.culture = mono_metadata_string_heap (image, cols [MONO_ASSEMBLYREF_CULTURE]); aname.flags = cols [MONO_ASSEMBLYREF_FLAGS]; aname.major = cols [MONO_ASSEMBLYREF_MAJOR_VERSION]; aname.minor = cols [MONO_ASSEMBLYREF_MINOR_VERSION]; aname.build = cols [MONO_ASSEMBLYREF_BUILD_NUMBER]; aname.revision = cols [MONO_ASSEMBLYREF_REV_NUMBER]; if (cols [MONO_ASSEMBLYREF_PUBLIC_KEY]) { gchar *token = assemblyref_public_tok (image, cols [MONO_ASSEMBLYREF_PUBLIC_KEY], aname.flags); g_strlcpy (aname.public_key_token, token, MONO_PUBLIC_KEY_TOKEN_LENGTH); g_free (token); } else { memset (aname.public_key_token, 0, MONO_PUBLIC_KEY_TOKEN_LENGTH); } if (image->assembly->ref_only) { /* We use the loaded corlib */ if (!strcmp (aname.name, "mscorlib")) reference = mono_assembly_load_full (&aname, image->assembly->basedir, &status, FALSE); else reference = mono_assembly_loaded_full (&aname, TRUE); /* * Here we must advice that the error was due to * a non loaded reference using the ReflectionOnly api */ if (!reference) reference = (gpointer)-1; } else reference = mono_assembly_load (&aname, image->assembly->basedir, &status); if (reference == NULL){ char *extra_msg = g_strdup (""); if (status == MONO_IMAGE_ERROR_ERRNO && errno == ENOENT) { extra_msg = g_strdup_printf ("The assembly was not found in the Global Assembly Cache, a path listed in the MONO_PATH environment variable, or in the location of the executing assembly (%s).\n", image->assembly->basedir); } else if (status == MONO_IMAGE_ERROR_ERRNO) { extra_msg = g_strdup_printf ("System error: %s\n", strerror (errno)); } else if (status == MONO_IMAGE_MISSING_ASSEMBLYREF) { extra_msg = g_strdup ("Cannot find an assembly referenced from this one.\n"); } else if (status == MONO_IMAGE_IMAGE_INVALID) { extra_msg = g_strdup ("The file exists but is not a valid assembly.\n"); } g_warning ("The following assembly referenced from %s could not be loaded:\n" " Assembly: %s (assemblyref_index=%d)\n" " Version: %d.%d.%d.%d\n" " Public Key: %s\n%s", image->name, aname.name, index, aname.major, aname.minor, aname.build, aname.revision, strlen(aname.public_key_token) == 0 ? "(none)" : (char*)aname.public_key_token, extra_msg); g_free (extra_msg); } EnterCriticalSection (&assemblies_mutex); if (reference == NULL) { /* Flag as not found */ reference = (gpointer)-1; } else { mono_assembly_addref (reference); } if (!image->references [index]) image->references [index] = reference; LeaveCriticalSection (&assemblies_mutex); if (image->references [index] != reference) { /* Somebody loaded it before us */ mono_assembly_close (reference); } } void mono_assembly_load_references (MonoImage *image, MonoImageOpenStatus *status) { MonoTableInfo *t; int i; *status = MONO_IMAGE_OK; t = &image->tables [MONO_TABLE_ASSEMBLYREF]; image->references = g_new0 (MonoAssembly *, t->rows + 1); /* resolve assembly references for modules */ for (i = 0; i < image->module_count; i++){ if (image->modules [i]) { image->modules [i]->assembly = image->assembly; mono_assembly_load_references (image->modules [i], status); } } } typedef struct AssemblyLoadHook AssemblyLoadHook; struct AssemblyLoadHook { AssemblyLoadHook *next; MonoAssemblyLoadFunc func; gpointer user_data; }; AssemblyLoadHook *assembly_load_hook = NULL; void mono_assembly_invoke_load_hook (MonoAssembly *ass) { AssemblyLoadHook *hook; for (hook = assembly_load_hook; hook; hook = hook->next) { hook->func (ass, hook->user_data); } } void mono_install_assembly_load_hook (MonoAssemblyLoadFunc func, gpointer user_data) { AssemblyLoadHook *hook; g_return_if_fail (func != NULL); hook = g_new0 (AssemblyLoadHook, 1); hook->func = func; hook->user_data = user_data; hook->next = assembly_load_hook; assembly_load_hook = hook; } typedef struct AssemblySearchHook AssemblySearchHook; struct AssemblySearchHook { AssemblySearchHook *next; MonoAssemblySearchFunc func; gpointer user_data; }; AssemblySearchHook *assembly_search_hook = NULL; static AssemblySearchHook *assembly_refonly_search_hook = NULL; MonoAssembly* mono_assembly_invoke_search_hook (MonoAssemblyName *aname) { AssemblySearchHook *hook; for (hook = assembly_search_hook; hook; hook = hook->next) { MonoAssembly *ass = hook->func (aname, hook->user_data); if (ass) return ass; } return NULL; } static MonoAssembly* mono_assembly_refonly_invoke_search_hook (MonoAssemblyName *aname) { AssemblySearchHook *hook; for (hook = assembly_refonly_search_hook; hook; hook = hook->next) { MonoAssembly *ass = hook->func (aname, hook->user_data); if (ass) return ass; } return NULL; } void mono_install_assembly_search_hook (MonoAssemblySearchFunc func, gpointer user_data) { AssemblySearchHook *hook; g_return_if_fail (func != NULL); hook = g_new0 (AssemblySearchHook, 1); hook->func = func; hook->user_data = user_data; hook->next = assembly_search_hook; assembly_search_hook = hook; } void mono_install_assembly_refonly_search_hook (MonoAssemblySearchFunc func, gpointer user_data) { AssemblySearchHook *hook; g_return_if_fail (func != NULL); hook = g_new0 (AssemblySearchHook, 1); hook->func = func; hook->user_data = user_data; hook->next = assembly_refonly_search_hook; assembly_refonly_search_hook = hook; } typedef struct AssemblyPreLoadHook AssemblyPreLoadHook; struct AssemblyPreLoadHook { AssemblyPreLoadHook *next; MonoAssemblyPreLoadFunc func; gpointer user_data; }; static AssemblyPreLoadHook *assembly_preload_hook = NULL; static AssemblyPreLoadHook *assembly_refonly_preload_hook = NULL; static MonoAssembly * invoke_assembly_preload_hook (MonoAssemblyName *aname, gchar **assemblies_path) { AssemblyPreLoadHook *hook; MonoAssembly *assembly; for (hook = assembly_preload_hook; hook; hook = hook->next) { assembly = hook->func (aname, assemblies_path, hook->user_data); if (assembly != NULL) return assembly; } return NULL; } static MonoAssembly * invoke_assembly_refonly_preload_hook (MonoAssemblyName *aname, gchar **assemblies_path) { AssemblyPreLoadHook *hook; MonoAssembly *assembly; for (hook = assembly_refonly_preload_hook; hook; hook = hook->next) { assembly = hook->func (aname, assemblies_path, hook->user_data); if (assembly != NULL) return assembly; } return NULL; } void mono_install_assembly_preload_hook (MonoAssemblyPreLoadFunc func, gpointer user_data) { AssemblyPreLoadHook *hook; g_return_if_fail (func != NULL); hook = g_new0 (AssemblyPreLoadHook, 1); hook->func = func; hook->user_data = user_data; hook->next = assembly_preload_hook; assembly_preload_hook = hook; } void mono_install_assembly_refonly_preload_hook (MonoAssemblyPreLoadFunc func, gpointer user_data) { AssemblyPreLoadHook *hook; g_return_if_fail (func != NULL); hook = g_new0 (AssemblyPreLoadHook, 1); hook->func = func; hook->user_data = user_data; hook->next = assembly_refonly_preload_hook; assembly_refonly_preload_hook = hook; } static gchar * absolute_dir (const gchar *filename) { gchar *cwd; gchar *mixed; gchar **parts; gchar *part; GList *list, *tmp; GString *result; gchar *res; gint i; if (g_path_is_absolute (filename)) return g_path_get_dirname (filename); cwd = g_get_current_dir (); mixed = g_build_filename (cwd, filename, NULL); parts = g_strsplit (mixed, G_DIR_SEPARATOR_S, 0); g_free (mixed); g_free (cwd); list = NULL; for (i = 0; (part = parts [i]) != NULL; i++) { if (!strcmp (part, ".")) continue; if (!strcmp (part, "..")) { if (list && list->next) /* Don't remove root */ list = g_list_delete_link (list, list); } else { list = g_list_prepend (list, part); } } result = g_string_new (""); list = g_list_reverse (list); /* Ignores last data pointer, which should be the filename */ for (tmp = list; tmp && tmp->next != NULL; tmp = tmp->next) if (tmp->data) g_string_append_printf (result, "%s%c", (char *) tmp->data, G_DIR_SEPARATOR); res = result->str; g_string_free (result, FALSE); g_list_free (list); g_strfreev (parts); if (*res == '\0') { g_free (res); return g_strdup ("."); } return res; } /** * mono_assembly_open_from_bundle: * @filename: Filename requested * @status: return value * * This routine tries to open the assembly specified by `filename' from the * defined bundles, if found, returns the MonoImage for it, if not found * returns NULL */ static MonoImage * mono_assembly_open_from_bundle (const char *filename, MonoImageOpenStatus *status, gboolean refonly) { int i; char *name = g_path_get_basename (filename); MonoImage *image = NULL; /* * we do a very simple search for bundled assemblies: it's not a general * purpose assembly loading mechanism. */ EnterCriticalSection (&assemblies_mutex); for (i = 0; !image && bundles [i]; ++i) { if (strcmp (bundles [i]->name, name) == 0) { image = mono_image_open_from_data_full ((char*)bundles [i]->data, bundles [i]->size, FALSE, status, refonly); break; } } LeaveCriticalSection (&assemblies_mutex); g_free (name); if (image) { mono_image_addref (image); return image; } return NULL; } static MonoImage* do_mono_assembly_open (const char *filename, MonoImageOpenStatus *status, gboolean refonly) { MonoImage *image = NULL; if (bundles != NULL){ image = mono_assembly_open_from_bundle (filename, status, refonly); if (image != NULL) return image; } EnterCriticalSection (&assemblies_mutex); image = mono_image_open_full (filename, status, refonly); LeaveCriticalSection (&assemblies_mutex); return image; } MonoAssembly * mono_assembly_open_full (const char *filename, MonoImageOpenStatus *status, gboolean refonly) { MonoImage *image; MonoAssembly *ass; MonoImageOpenStatus def_status; gchar *fname; g_return_val_if_fail (filename != NULL, NULL); if (!status) status = &def_status; *status = MONO_IMAGE_OK; if (strncmp (filename, "file://", 7) == 0) { GError *error = NULL; gchar *uri = (gchar *) filename; gchar *tmpuri; /* * MS allows file://c:/... and fails on file://localhost/c:/... * They also throw an IndexOutOfRangeException if "file://" */ if (uri [7] != '/') uri = g_strdup_printf ("file:///%s", uri + 7); tmpuri = uri; uri = mono_escape_uri_string (tmpuri); fname = g_filename_from_uri (uri, NULL, &error); g_free (uri); if (tmpuri != filename) g_free (tmpuri); if (error != NULL) { g_warning ("%s\n", error->message); g_error_free (error); fname = g_strdup (filename); } } else { fname = g_strdup (filename); } mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_ASSEMBLY, "Assembly Loader probing location: '%s'.", filename); image = do_mono_assembly_open (fname, status, refonly); if (!image){ *status = MONO_IMAGE_ERROR_ERRNO; g_free (fname); return NULL; } ass = mono_assembly_load_from_full (image, fname, status, refonly); if (ass) { mono_trace (G_LOG_LEVEL_INFO, MONO_TRACE_ASSEMBLY, "Assembly Loader loaded assembly from location: '%s'.", filename); if (!refonly) mono_config_for_assembly (ass->image); } g_free (fname); return ass; } /** * mono_assembly_open: * @filename: Opens the assembly pointed out by this name * @status: where a status code can be returned * * mono_assembly_open opens the PE-image pointed by @filename, and * loads any external assemblies referenced by it. * * NOTE: we could do lazy loading of the assemblies. Or maybe not worth * it. */ MonoAssembly * mono_assembly_open (const char *filename, MonoImageOpenStatus *status) { return mono_assembly_open_full (filename, status, FALSE); } MonoAssembly * mono_assembly_load_from_full (MonoImage *image, const char*fname, MonoImageOpenStatus *status, gboolean refonly) { MonoAssembly *ass, *ass2; char *base_dir; GList *loading; GHashTable *ass_loading; #if defined (PLATFORM_WIN32) { gchar *tmp_fn; int i; tmp_fn = g_strdup (fname); for (i = strlen (tmp_fn) - 1; i >= 0; i--) { if (tmp_fn [i] == '/') tmp_fn [i] = '\\'; } base_dir = absolute_dir (tmp_fn); g_free (tmp_fn); } #else base_dir = absolute_dir (fname); #endif /* * To avoid deadlocks and scalability problems, we load assemblies outside * the assembly lock. This means that multiple threads might try to load * the same assembly at the same time. The first one to load it completely * "wins", the other threads free their copy and use the one loaded by * the winning thread. */ /* * Create assembly struct, and enter it into the assembly cache */ ass = g_new0 (MonoAssembly, 1); ass->basedir = base_dir; ass->ref_only = refonly; ass->image = image; ass->ref_count = 1; mono_assembly_fill_assembly_name (image, &ass->aname); /* * Atomically search the loaded list and add ourselves to it if necessary. */ EnterCriticalSection (&assemblies_mutex); if (ass->aname.name) { /* avoid loading the same assembly twice for now... */ ass2 = search_loaded (&ass->aname, refonly); if (ass2) { g_free (ass); g_free (base_dir); mono_image_close (image); *status = MONO_IMAGE_OK; LeaveCriticalSection (&assemblies_mutex); return ass2; } } ass_loading = refonly ? assemblies_refonly_loading : assemblies_loading; loading = g_hash_table_lookup (ass_loading, GetCurrentThread ()); loading = g_list_prepend (loading, ass); g_hash_table_insert (ass_loading, GetCurrentThread (), loading); LeaveCriticalSection (&assemblies_mutex); image->assembly = ass; mono_assembly_load_references (image, status); EnterCriticalSection (&assemblies_mutex); loading = g_hash_table_lookup (ass_loading, GetCurrentThread ()); loading = g_list_remove (loading, ass); if (loading == NULL) /* Prevent memory leaks */ g_hash_table_remove (ass_loading, GetCurrentThread ()); else g_hash_table_insert (ass_loading, GetCurrentThread (), loading); if (*status != MONO_IMAGE_OK) { LeaveCriticalSection (&assemblies_mutex); mono_assembly_close (ass); return NULL; } if (ass->aname.name) { ass2 = search_loaded (&ass->aname, refonly); if (ass2) { /* Somebody else has loaded the assembly before us */ LeaveCriticalSection (&assemblies_mutex); mono_assembly_close (ass); return ass2; } } loaded_assemblies = g_list_prepend (loaded_assemblies, ass); LeaveCriticalSection (&assemblies_mutex); mono_assembly_invoke_load_hook (ass); return ass; } MonoAssembly * mono_assembly_load_from (MonoImage *image, const char *fname, MonoImageOpenStatus *status) { return mono_assembly_load_from_full (image, fname, status, FALSE); } /** * mono_assembly_name_free: * @aname: assembly name to free * * Frees the provided assembly name object. * (it does not frees the object itself, only the name members). */ void mono_assembly_name_free (MonoAssemblyName *aname) { if (aname == NULL) return; g_free ((void *) aname->name); g_free ((void *) aname->culture); g_free ((void *) aname->hash_value); } static gboolean build_assembly_name (const char *name, const char *version, const char *culture, const char *token, MonoAssemblyName *aname) { gint major, minor, build, revision; memset (aname, 0, sizeof (MonoAssemblyName)); if (version) { if (sscanf (version, "%u.%u.%u.%u", &major, &minor, &build, &revision) != 4) return FALSE; aname->major = major; aname->minor = minor; aname->build = build; aname->revision = revision; } aname->name = g_strdup (name); if (culture) { if (g_strcasecmp (culture, "neutral") == 0) aname->culture = g_strdup (""); else aname->culture = g_strdup (culture); } if (token && strncmp (token, "null", 4) != 0) g_strlcpy ((char*)aname->public_key_token, token, MONO_PUBLIC_KEY_TOKEN_LENGTH); return TRUE; } static gboolean parse_assembly_directory_name (const char *name, const char *dirname, MonoAssemblyName *aname) { gchar **parts; gboolean res; parts = g_strsplit (dirname, "_", 3); if (!parts || !parts[0] || !parts[1] || !parts[2]) { g_strfreev (parts); return FALSE; } res = build_assembly_name (name, parts[0], parts[1], parts[2], aname); g_strfreev (parts); return res; } /** * mono_assembly_name_parse: * @name: name to parse * @aname: the destination assembly name * Returns: true if the name could be parsed. * * Parses an assembly qualified type name and assigns the name, * version, culture and token to the provided assembly name object. */ gboolean mono_assembly_name_parse (const char *name, MonoAssemblyName *aname) { gchar *dllname; gchar *version = NULL; gchar *culture = NULL; gchar *token = NULL; gboolean res; gchar *value; gchar **parts; gchar **tmp; parts = tmp = g_strsplit (name, ",", 4); if (!tmp || !*tmp) { g_strfreev (tmp); return FALSE; } dllname = g_strstrip (*tmp); tmp++; while (*tmp) { value = g_strstrip (*tmp); if (!g_ascii_strncasecmp (value, "Version=", 8)) { version = g_strstrip (value + 8); tmp++; continue; } if (!g_ascii_strncasecmp (value, "Culture=", 8)) { culture = g_strstrip (value + 8); tmp++; continue; } if (!g_ascii_strncasecmp (value, "PublicKeyToken=", 15)) { token = g_strstrip (value + 15); tmp++; continue; } g_strfreev (parts); return FALSE; } res = build_assembly_name (dllname, version, culture, token, aname); g_strfreev (parts); return res; } static MonoAssembly* probe_for_partial_name (const char *basepath, const char *fullname, MonoAssemblyName *aname, MonoImageOpenStatus *status) { gchar *fullpath = NULL; GDir *dirhandle; const char* direntry; MonoAssemblyName gac_aname; gint major=-1, minor=0, build=0, revision=0; gboolean exact_version; dirhandle = g_dir_open (basepath, 0, NULL); if (!dirhandle) return NULL; exact_version = (aname->major | aname->minor | aname->build | aname->revision) != 0; while ((direntry = g_dir_read_name (dirhandle))) { gboolean match = TRUE; parse_assembly_directory_name (aname->name, direntry, &gac_aname); if (aname->culture != NULL && strcmp (aname->culture, gac_aname.culture) != 0) match = FALSE; if (match && strlen ((char*)aname->public_key_token) > 0 && strcmp ((char*)aname->public_key_token, (char*)gac_aname.public_key_token) != 0) match = FALSE; if (match) { if (exact_version) { match = (aname->major == gac_aname.major && aname->minor == gac_aname.minor && aname->build == gac_aname.build && aname->revision == gac_aname.revision); } else if (gac_aname.major < major) match = FALSE; else if (gac_aname.major == major) { if (gac_aname.minor < minor) match = FALSE; else if (gac_aname.minor == minor) { if (gac_aname.build < build) match = FALSE; else if (gac_aname.build == build && gac_aname.revision <= revision) match = FALSE; } } } if (match) { major = gac_aname.major; minor = gac_aname.minor; build = gac_aname.build; revision = gac_aname.revision; g_free (fullpath); fullpath = g_build_path (G_DIR_SEPARATOR_S, basepath, direntry, fullname, NULL); } mono_assembly_name_free (&gac_aname); } g_dir_close (dirhandle); if (fullpath == NULL) return NULL; else { MonoAssembly *res = mono_assembly_open (fullpath, status); g_free (fullpath); return res; } } MonoAssembly* mono_assembly_load_with_partial_name (const char *name, MonoImageOpenStatus *status) { MonoAssembly *res; MonoAssemblyName *aname, base_name, maped_aname; gchar *fullname, *gacpath; gchar **paths; memset (&base_name, 0, sizeof (MonoAssemblyName)); aname = &base_name; if (!mono_assembly_name_parse (name, aname)) return NULL; /* * If no specific version has been requested, make sure we load the * correct version for system assemblies. */ if ((aname->major | aname->minor | aname->build | aname->revision) == 0) aname = mono_assembly_remap_version (aname, &maped_aname); res = mono_assembly_loaded (aname); if (res) { mono_assembly_name_free (aname); return res; } res = invoke_assembly_preload_hook (aname, assemblies_path); if (res) { res->in_gac = FALSE; mono_assembly_name_free (aname); return res; } fullname = g_strdup_printf ("%s.dll", aname->name); if (extra_gac_paths) { paths = extra_gac_paths; while (!res && *paths) { gacpath = g_build_path (G_DIR_SEPARATOR_S, *paths, "lib", "mono", "gac", aname->name, NULL); res = probe_for_partial_name (gacpath, fullname, aname, status); g_free (gacpath); paths++; } } if (res) { res->in_gac = TRUE; g_free (fullname); mono_assembly_name_free (aname); return res; } gacpath = g_build_path (G_DIR_SEPARATOR_S, mono_assembly_getrootdir (), "mono", "gac", aname->name, NULL); res = probe_for_partial_name (gacpath, fullname, aname, status); g_free (gacpath); if (res) res->in_gac = TRUE; g_free (fullname); mono_assembly_name_free (aname); return res; } /** * mono_assembly_load_from_gac * * @aname: The assembly name object */ static MonoAssembly* mono_assembly_load_from_gac (MonoAssemblyName *aname, gchar *filename, MonoImageOpenStatus *status, MonoBoolean refonly) { MonoAssembly *result = NULL; gchar *name, *version, *culture, *fullpath, *subpath; gint32 len; gchar **paths; if (aname->public_key_token [0] == 0) { return NULL; } if (strstr (aname->name, ".dll")) { len = strlen (filename) - 4; name = g_malloc (len); strncpy (name, aname->name, len); } else { name = g_strdup (aname->name); } if (aname->culture) { culture = g_strdup (aname->culture); g_strdown (culture); } else { culture = g_strdup (""); } version = g_strdup_printf ("%d.%d.%d.%d_%s_%s", aname->major, aname->minor, aname->build, aname->revision, culture, aname->public_key_token); subpath = g_build_path (G_DIR_SEPARATOR_S, name, version, filename, NULL); g_free (name); g_free (version); g_free (culture); if (extra_gac_paths) { paths = extra_gac_paths; while (!result && *paths) { fullpath = g_build_path (G_DIR_SEPARATOR_S, *paths, "lib", "mono", "gac", subpath, NULL); result = mono_assembly_open_full (fullpath, status, refonly); g_free (fullpath); paths++; } } if (result) { result->in_gac = TRUE; g_free (subpath); return result; } fullpath = g_build_path (G_DIR_SEPARATOR_S, mono_assembly_getrootdir (), "mono", "gac", subpath, NULL); result = mono_assembly_open_full (fullpath, status, refonly); g_free (fullpath); if (result) result->in_gac = TRUE; g_free (subpath); return result; } MonoAssembly* mono_assembly_load_corlib (const MonoRuntimeInfo *runtime, MonoImageOpenStatus *status) { char *corlib_file; if (corlib) { /* g_print ("corlib already loaded\n"); */ return corlib; } if (assemblies_path) { corlib = load_in_path ("mscorlib.dll", (const char**)assemblies_path, status, FALSE); if (corlib) return corlib; } /* Load corlib from mono/ */ corlib_file = g_build_filename ("mono", runtime->framework_version, "mscorlib.dll", NULL); if (assemblies_path) { corlib = load_in_path (corlib_file, (const char**)assemblies_path, status, FALSE); if (corlib) { g_free (corlib_file); return corlib; } } corlib = load_in_path (corlib_file, default_path, status, FALSE); g_free (corlib_file); return corlib; } MonoAssembly* mono_assembly_load_full (MonoAssemblyName *aname, const char *basedir, MonoImageOpenStatus *status, gboolean refonly) { MonoAssembly *result; char *fullpath, *filename; MonoAssemblyName maped_aname; aname = mono_assembly_remap_version (aname, &maped_aname); result = mono_assembly_loaded_full (aname, refonly); if (result) return result; result = refonly ? invoke_assembly_refonly_preload_hook (aname, assemblies_path) : invoke_assembly_preload_hook (aname, assemblies_path); if (result) { result->in_gac = FALSE; return result; } /* Currently we retrieve the loaded corlib for reflection * only requests, like a common reflection only assembly */ if (strcmp (aname->name, "mscorlib") == 0 || strcmp (aname->name, "mscorlib.dll") == 0) { return mono_assembly_load_corlib (mono_get_runtime_info (), status); } if (strstr (aname->name, ".dll")) filename = g_strdup (aname->name); else filename = g_strconcat (aname->name, ".dll", NULL); result = mono_assembly_load_from_gac (aname, filename, status, refonly); if (result) { g_free (filename); return result; } if (basedir) { fullpath = g_build_filename (basedir, filename, NULL); result = mono_assembly_open_full (fullpath, status, refonly); g_free (fullpath); if (result) { result->in_gac = FALSE; g_free (filename); return result; } } result = load_in_path (filename, default_path, status, refonly); if (result) result->in_gac = FALSE; g_free (filename); return result; } MonoAssembly* mono_assembly_load (MonoAssemblyName *aname, const char *basedir, MonoImageOpenStatus *status) { return mono_assembly_load_full (aname, basedir, status, FALSE); } MonoAssembly* mono_assembly_loaded_full (MonoAssemblyName *aname, gboolean refonly) { MonoAssembly *res; MonoAssemblyName maped_aname; aname = mono_assembly_remap_version (aname, &maped_aname); EnterCriticalSection (&assemblies_mutex); res = search_loaded (aname, refonly); LeaveCriticalSection (&assemblies_mutex); return res; } MonoAssembly* mono_assembly_loaded (MonoAssemblyName *aname) { return mono_assembly_loaded_full (aname, FALSE); } void mono_assembly_close (MonoAssembly *assembly) { g_return_if_fail (assembly != NULL); if (InterlockedDecrement (&assembly->ref_count)) return; EnterCriticalSection (&assemblies_mutex); loaded_assemblies = g_list_remove (loaded_assemblies, assembly); LeaveCriticalSection (&assemblies_mutex); /* assemblies belong to domains, so the domain code takes care of unloading the * referenced assemblies */ mono_image_close (assembly->image); g_free (assembly->basedir); if (!assembly->dynamic) g_free (assembly); } MonoImage* mono_assembly_load_module (MonoAssembly *assembly, guint32 idx) { MonoImageOpenStatus status; MonoImage *module; module = mono_image_load_file_for_image (assembly->image, idx); if (module) mono_assembly_load_references (module, &status); return module; } void mono_assembly_foreach (GFunc func, gpointer user_data) { GList *copy; /* * We make a copy of the list to avoid calling the callback inside the * lock, which could lead to deadlocks. */ EnterCriticalSection (&assemblies_mutex); copy = g_list_copy (loaded_assemblies); LeaveCriticalSection (&assemblies_mutex); g_list_foreach (loaded_assemblies, func, user_data); g_list_free (copy); } /* * Holds the assembly of the application, for * System.Diagnostics.Process::MainModule */ static MonoAssembly *main_assembly=NULL; void mono_assembly_set_main (MonoAssembly *assembly) { main_assembly=assembly; } MonoAssembly * mono_assembly_get_main (void) { return(main_assembly); } MonoImage* mono_assembly_get_image (MonoAssembly *assembly) { return assembly->image; } void mono_register_bundled_assemblies (const MonoBundledAssembly **assemblies) { bundles = assemblies; }