2 * mono-error.c: Error handling code
5 * Rodrigo Kumpera (rkumpera@novell.com)
6 * Copyright 2009 Novell, Inc (http://www.novell.com)
7 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
11 #include "mono-error.h"
12 #include "mono-error-internals.h"
14 #include <mono/metadata/exception.h>
15 #include <mono/metadata/debug-helpers.h>
16 #include <mono/metadata/object-internals.h>
18 #define set_error_messagev() do { \
19 if (!(error->full_message = g_strdup_vprintf (msg_format, args))) \
20 error->flags |= MONO_ERROR_INCOMPLETE; \
23 #define set_error_message() do { \
25 va_start (args, msg_format); \
26 set_error_messagev(); \
31 mono_error_set_generic_errorv (MonoError *oerror, const char *name_space, const char *name, const char *msg_format, va_list args);
34 is_managed_exception (MonoErrorInternal *error)
36 return (error->error_code == MONO_ERROR_EXCEPTION_INSTANCE);
40 mono_error_prepare (MonoErrorInternal *error)
42 if (error->error_code != MONO_ERROR_NONE)
45 error->type_name = error->assembly_name = error->member_name = error->full_message = error->exception_name_space = error->exception_name = error->full_message_with_fields = error->first_argument = NULL;
46 error->exn.klass = NULL;
50 get_class (MonoErrorInternal *error)
52 MonoClass *klass = NULL;
53 if (is_managed_exception (error))
54 klass = mono_object_class (mono_gchandle_get_target (error->exn.instance_handle));
56 klass = error->exn.klass;
61 get_type_name (MonoErrorInternal *error)
64 return error->type_name;
65 MonoClass *klass = get_class (error);
68 return "<unknown type>";
72 get_assembly_name (MonoErrorInternal *error)
74 if (error->assembly_name)
75 return error->assembly_name;
76 MonoClass *klass = get_class (error);
77 if (klass && klass->image)
78 return klass->image->name;
79 return "<unknown assembly>";
83 mono_error_init_flags (MonoError *oerror, unsigned short flags)
85 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
86 g_assert (sizeof (MonoError) == sizeof (MonoErrorInternal));
88 error->error_code = MONO_ERROR_NONE;
94 * @error: Pointer to MonoError struct to initialize
96 * Any function which takes a MonoError for purposes of reporting an error
97 * is required to call either this or mono_error_init_flags on entry.
100 mono_error_init (MonoError *error)
102 mono_error_init_flags (error, 0);
106 mono_error_cleanup (MonoError *oerror)
108 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
109 if (error->error_code == MONO_ERROR_NONE)
112 if (is_managed_exception (error))
113 mono_gchandle_free (error->exn.instance_handle);
115 g_free ((char*)error->full_message);
116 g_free ((char*)error->full_message_with_fields);
117 if (!(error->flags & MONO_ERROR_FREE_STRINGS)) //no memory was allocated
120 g_free ((char*)error->type_name);
121 g_free ((char*)error->assembly_name);
122 g_free ((char*)error->member_name);
123 g_free ((char*)error->exception_name_space);
124 g_free ((char*)error->exception_name);
125 g_free ((char*)error->first_argument);
129 mono_error_ok (MonoError *error)
131 return error->error_code == MONO_ERROR_NONE;
135 mono_error_assert_ok_pos (MonoError *error, const char* filename, int lineno)
137 if (mono_error_ok (error))
140 g_error ("%s:%d: %s\n", filename, lineno, mono_error_get_message (error));
144 mono_error_get_error_code (MonoError *error)
146 return error->error_code;
149 /*Return a pointer to the internal error message, might be NULL.
150 Caller should not release it.*/
152 mono_error_get_message (MonoError *oerror)
154 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
155 if (error->error_code == MONO_ERROR_NONE)
157 if (error->full_message_with_fields)
158 return error->full_message_with_fields;
160 error->full_message_with_fields = g_strdup_printf ("%s assembly:%s type:%s member:%s",
162 get_assembly_name (error),
163 get_type_name (error),
164 error->member_name ? error->member_name : "<none>");
166 return error->full_message_with_fields ? error->full_message_with_fields : error->full_message;
170 * Inform that this error has heap allocated strings.
171 * The strings will be duplicated if @dup_strings is TRUE
172 * otherwise they will just be free'd in mono_error_cleanup.
175 mono_error_dup_strings (MonoError *oerror, gboolean dup_strings)
177 #define DUP_STR(field) do { if (error->field) {\
178 if (!(error->field = g_strdup (error->field))) \
179 error->flags |= MONO_ERROR_INCOMPLETE; \
182 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
183 error->flags |= MONO_ERROR_FREE_STRINGS;
187 DUP_STR (assembly_name);
188 DUP_STR (member_name);
189 DUP_STR (exception_name_space);
190 DUP_STR (exception_name);
191 DUP_STR (first_argument);
197 mono_error_set_error (MonoError *oerror, int error_code, const char *msg_format, ...)
199 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
200 mono_error_prepare (error);
202 error->error_code = error_code;
203 set_error_message ();
207 mono_error_set_assembly_name (MonoError *oerror, const char *assembly_name)
209 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
210 g_assert (error->error_code != MONO_ERROR_NONE);
212 error->assembly_name = assembly_name;
216 mono_error_set_member_name (MonoError *oerror, const char *member_name)
218 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
220 error->member_name = member_name;
224 mono_error_set_type_name (MonoError *oerror, const char *type_name)
226 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
228 error->type_name = type_name;
232 mono_error_set_class (MonoError *oerror, MonoClass *klass)
234 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
236 if (is_managed_exception (error))
238 error->exn.klass = klass;
242 mono_error_set_corlib_exception (MonoError *oerror, const char *name_space, const char *name)
244 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
246 error->exception_name_space = name_space;
247 error->exception_name = name;
252 mono_error_set_assembly_load (MonoError *oerror, const char *assembly_name, const char *msg_format, ...)
254 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
255 mono_error_prepare (error);
257 error->error_code = MONO_ERROR_FILE_NOT_FOUND;
258 mono_error_set_assembly_name (oerror, assembly_name);
260 set_error_message ();
265 mono_error_set_assembly_load_simple (MonoError *oerror, const char *assembly_name, gboolean refection_only)
268 mono_error_set_assembly_load (oerror, assembly_name, "Cannot resolve dependency to assembly because it has not been preloaded. When using the ReflectionOnly APIs, dependent assemblies must be pre-loaded or loaded on demand through the ReflectionOnlyAssemblyResolve event.");
270 mono_error_set_assembly_load (oerror, assembly_name, "Could not load file or assembly or one of its dependencies.");
274 mono_error_set_type_load_class (MonoError *oerror, MonoClass *klass, const char *msg_format, ...)
276 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
277 mono_error_prepare (error);
279 error->error_code = MONO_ERROR_TYPE_LOAD;
280 mono_error_set_class (oerror, klass);
281 set_error_message ();
285 * Different than other functions, this one here assumes that type_name and assembly_name to have been allocated just for us.
286 * Which means mono_error_cleanup will free them.
289 mono_error_set_type_load_name (MonoError *oerror, const char *type_name, const char *assembly_name, const char *msg_format, ...)
291 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
292 mono_error_prepare (error);
294 error->error_code = MONO_ERROR_TYPE_LOAD;
295 mono_error_set_type_name (oerror, type_name);
296 mono_error_set_assembly_name (oerror, assembly_name);
297 mono_error_dup_strings (oerror, FALSE);
298 set_error_message ();
302 mono_error_set_method_load (MonoError *oerror, MonoClass *klass, const char *method_name, const char *msg_format, ...)
304 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
305 mono_error_prepare (error);
307 error->error_code = MONO_ERROR_MISSING_METHOD;
308 mono_error_set_class (oerror, klass);
309 mono_error_set_member_name (oerror, method_name);
310 set_error_message ();
314 mono_error_set_field_load (MonoError *oerror, MonoClass *klass, const char *field_name, const char *msg_format, ...)
316 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
317 mono_error_prepare (error);
319 error->error_code = MONO_ERROR_MISSING_FIELD;
320 mono_error_set_class (oerror, klass);
321 mono_error_set_member_name (oerror, field_name);
322 set_error_message ();
326 mono_error_set_bad_image_name (MonoError *oerror, const char *assembly_name, const char *msg_format, ...)
328 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
329 mono_error_prepare (error);
331 error->error_code = MONO_ERROR_BAD_IMAGE;
332 mono_error_set_assembly_name (oerror, assembly_name);
333 set_error_message ();
337 mono_error_set_bad_image (MonoError *oerror, MonoImage *image, const char *msg_format, ...)
339 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
340 mono_error_prepare (error);
342 error->error_code = MONO_ERROR_BAD_IMAGE;
343 error->assembly_name = image ? mono_image_get_name (image) : "<no_image>";
344 set_error_message ();
348 mono_error_set_generic_errorv (MonoError *oerror, const char *name_space, const char *name, const char *msg_format, va_list args)
350 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
351 mono_error_prepare (error);
353 error->error_code = MONO_ERROR_GENERIC;
354 mono_error_set_corlib_exception (oerror, name_space, name);
355 set_error_messagev ();
359 mono_error_set_generic_error (MonoError *oerror, const char * name_space, const char *name, const char *msg_format, ...)
362 va_start (args, msg_format);
363 mono_error_set_generic_errorv (oerror, name_space, name, msg_format, args);
368 * mono_error_set_not_implemented:
370 * System.NotImplementedException
373 mono_error_set_not_implemented (MonoError *oerror, const char *msg_format, ...)
376 va_start (args, msg_format);
377 mono_error_set_generic_errorv (oerror, "System", "NotImplementedException", msg_format, args);
382 * mono_error_set_execution_engine:
384 * System.ExecutionEngineException
387 mono_error_set_execution_engine (MonoError *oerror, const char *msg_format, ...)
390 va_start (args, msg_format);
391 mono_error_set_generic_errorv (oerror, "System", "ExecutionEngineException", msg_format, args);
396 * mono_error_set_execution_engine:
398 * System.NotSupportedException
401 mono_error_set_not_supported (MonoError *oerror, const char *msg_format, ...)
404 va_start (args, msg_format);
405 mono_error_set_generic_errorv (oerror, "System", "NotSupportedException", msg_format, args);
410 mono_error_set_exception_instance (MonoError *oerror, MonoException *exc)
412 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
414 mono_error_prepare (error);
415 error->error_code = MONO_ERROR_EXCEPTION_INSTANCE;
416 error->exn.instance_handle = mono_gchandle_new (exc ? &exc->object : NULL, FALSE);
420 mono_error_set_out_of_memory (MonoError *oerror, const char *msg_format, ...)
422 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
423 mono_error_prepare (error);
425 error->error_code = MONO_ERROR_OUT_OF_MEMORY;
427 set_error_message ();
431 mono_error_set_argument (MonoError *oerror, const char *argument, const char *msg_format, ...)
433 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
434 mono_error_prepare (error);
436 error->error_code = MONO_ERROR_ARGUMENT;
437 error->first_argument = argument;
439 set_error_message ();
443 mono_error_set_argument_null (MonoError *oerror, const char *argument, const char *msg_format, ...)
445 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
446 mono_error_prepare (error);
448 error->error_code = MONO_ERROR_ARGUMENT_NULL;
449 error->first_argument = argument;
451 set_error_message ();
455 mono_error_set_not_verifiable (MonoError *oerror, MonoMethod *method, const char *msg_format, ...)
457 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
458 mono_error_prepare (error);
460 error->error_code = MONO_ERROR_NOT_VERIFIABLE;
462 mono_error_set_class (oerror, method->klass);
463 mono_error_set_member_name (oerror, mono_method_full_name (method, 1));
466 set_error_message ();
471 get_type_name_as_mono_string (MonoErrorInternal *error, MonoDomain *domain, MonoError *error_out)
473 MonoString* res = NULL;
475 if (error->type_name) {
476 res = mono_string_new (domain, error->type_name);
479 MonoClass *klass = get_class (error);
481 char *name = mono_type_full_name (&klass->byval_arg);
483 res = mono_string_new (domain, name);
489 mono_error_set_out_of_memory (error_out, "Could not allocate type name");
494 set_message_on_exception (MonoException *exception, MonoErrorInternal *error, MonoError *error_out)
496 MonoString *msg = mono_string_new (mono_domain_get (), error->full_message);
498 MONO_OBJECT_SETREF (exception, message, msg);
500 mono_error_set_out_of_memory (error_out, "Could not allocate exception object");
503 /*Can fail with out-of-memory*/
505 mono_error_prepare_exception (MonoError *oerror, MonoError *error_out)
507 MonoErrorInternal *error = (MonoErrorInternal*)oerror;
509 MonoException* exception = NULL;
510 MonoString *assembly_name = NULL, *type_name = NULL, *method_name = NULL, *field_name = NULL, *msg = NULL;
511 MonoDomain *domain = mono_domain_get ();
513 mono_error_init (error_out);
515 switch (error->error_code) {
516 case MONO_ERROR_NONE:
519 case MONO_ERROR_MISSING_METHOD:
520 if ((error->type_name || error->exn.klass) && error->member_name) {
521 type_name = get_type_name_as_mono_string (error, domain, error_out);
522 if (!mono_error_ok (error_out))
525 method_name = mono_string_new (domain, error->member_name);
527 mono_error_set_out_of_memory (error_out, "Could not allocate method name");
531 exception = mono_exception_from_name_two_strings (mono_defaults.corlib, "System", "MissingMethodException", type_name, method_name);
533 set_message_on_exception (exception, error, error_out);
535 exception = mono_exception_from_name_msg (mono_defaults.corlib, "System", "MissingMethodException", error->full_message);
539 case MONO_ERROR_MISSING_FIELD:
540 if ((error->type_name || error->exn.klass) && error->member_name) {
541 type_name = get_type_name_as_mono_string (error, domain, error_out);
542 if (!mono_error_ok (error_out))
545 field_name = mono_string_new (domain, error->member_name);
547 mono_error_set_out_of_memory (error_out, "Could not allocate field name");
551 exception = mono_exception_from_name_two_strings (mono_defaults.corlib, "System", "MissingFieldException", type_name, field_name);
553 set_message_on_exception (exception, error, error_out);
555 exception = mono_exception_from_name_msg (mono_defaults.corlib, "System", "MissingFieldException", error->full_message);
559 case MONO_ERROR_TYPE_LOAD:
560 if ((error->type_name && error->assembly_name) || error->exn.klass) {
561 type_name = get_type_name_as_mono_string (error, domain, error_out);
562 if (!mono_error_ok (error_out))
565 if (error->assembly_name) {
566 assembly_name = mono_string_new (domain, error->assembly_name);
567 if (!assembly_name) {
568 mono_error_set_out_of_memory (error_out, "Could not allocate assembly name");
573 exception = mono_exception_from_name_two_strings (mono_get_corlib (), "System", "TypeLoadException", type_name, assembly_name);
575 set_message_on_exception (exception, error, error_out);
577 exception = mono_exception_from_name_msg (mono_defaults.corlib, "System", "TypeLoadException", error->full_message);
581 case MONO_ERROR_FILE_NOT_FOUND:
582 case MONO_ERROR_BAD_IMAGE:
583 if (error->assembly_name) {
584 msg = mono_string_new (domain, error->full_message);
586 mono_error_set_out_of_memory (error_out, "Could not allocate message");
590 if (error->assembly_name) {
591 assembly_name = mono_string_new (domain, error->assembly_name);
592 if (!assembly_name) {
593 mono_error_set_out_of_memory (error_out, "Could not allocate assembly name");
598 if (error->error_code == MONO_ERROR_FILE_NOT_FOUND)
599 exception = mono_exception_from_name_two_strings (mono_get_corlib (), "System.IO", "FileNotFoundException", msg, assembly_name);
601 exception = mono_exception_from_name_two_strings (mono_defaults.corlib, "System", "BadImageFormatException", msg, assembly_name);
603 if (error->error_code == MONO_ERROR_FILE_NOT_FOUND)
604 exception = mono_exception_from_name_msg (mono_get_corlib (), "System.IO", "FileNotFoundException", error->full_message);
606 exception = mono_exception_from_name_msg (mono_defaults.corlib, "System", "BadImageFormatException", error->full_message);
610 case MONO_ERROR_OUT_OF_MEMORY:
611 exception = mono_get_exception_out_of_memory ();
614 case MONO_ERROR_ARGUMENT:
615 exception = mono_get_exception_argument (error->first_argument, error->full_message);
618 case MONO_ERROR_ARGUMENT_NULL:
619 exception = mono_get_exception_argument_null (error->first_argument);
622 case MONO_ERROR_NOT_VERIFIABLE: {
623 char *type_name = NULL, *message;
624 if (error->exn.klass) {
625 type_name = mono_type_get_full_name (error->exn.klass);
627 mono_error_set_out_of_memory (error_out, "Could not allocate message");
631 message = g_strdup_printf ("Error in %s:%s %s", type_name, error->member_name, error->full_message);
634 mono_error_set_out_of_memory (error_out, "Could not allocate message");
637 exception = mono_exception_from_name_msg (mono_defaults.corlib, "System.Security", "VerificationException", message);
642 case MONO_ERROR_GENERIC:
643 if (!error->exception_name_space || !error->exception_name)
644 mono_error_set_execution_engine (error_out, "MonoError with generic error but no exception name was supplied");
646 exception = mono_exception_from_name_msg (mono_defaults.corlib, error->exception_name_space, error->exception_name, error->full_message);
649 case MONO_ERROR_EXCEPTION_INSTANCE:
650 exception = (MonoException*) mono_gchandle_get_target (error->exn.instance_handle);
654 mono_error_set_execution_engine (error_out, "Invalid error-code %d", error->error_code);
657 if (!mono_error_ok (error_out))
660 mono_error_set_out_of_memory (error_out, "Could not allocate exception object");
665 Convert this MonoError to an exception if it's faulty or return NULL.
666 The error object is cleant after.
670 mono_error_convert_to_exception (MonoError *target_error)
675 if (mono_error_ok (target_error))
678 ex = mono_error_prepare_exception (target_error, &error);
679 if (!mono_error_ok (&error)) {
680 MonoError second_chance;
681 /*Try to produce the exception for the second error. FIXME maybe we should log about the original one*/
682 ex = mono_error_prepare_exception (&error, &second_chance);
684 g_assert (mono_error_ok (&second_chance)); /*We can't reasonable handle double faults, maybe later.*/
685 mono_error_cleanup (&error);
687 mono_error_cleanup (target_error);
692 mono_error_move (MonoError *dest, MonoError *src)
694 memcpy (dest, src, sizeof (MonoErrorInternal));
695 mono_error_init (src);