2 * remoting.c: Remoting support
4 * Copyright 2002-2003 Ximian, Inc (http://www.ximian.com)
5 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
6 * Copyright 2011-2014 Xamarin, Inc (http://www.xamarin.com)
12 #include "mono/metadata/remoting.h"
13 #include "mono/metadata/marshal.h"
14 #include "mono/metadata/abi-details.h"
15 #include "mono/metadata/cominterop.h"
16 #include "mono/metadata/tabledefs.h"
17 #include "mono/metadata/exception.h"
18 #include "mono/metadata/debug-helpers.h"
21 MONO_MARSHAL_NONE, /* No marshalling needed */
22 MONO_MARSHAL_COPY, /* Can be copied by value to the new domain */
23 MONO_MARSHAL_COPY_OUT, /* out parameter that needs to be copied back to the original instance */
24 MONO_MARSHAL_SERIALIZE /* Value needs to be serialized into the new domain */
25 } MonoXDomainMarshalType;
27 #ifndef DISABLE_REMOTING
29 #define OPDEF(a,b,c,d,e,f,g,h,i,j) \
33 #include "mono/cil/opcode.def"
38 struct _MonoRemotingMethods {
40 MonoMethod *invoke_with_check;
41 MonoMethod *xdomain_invoke;
42 MonoMethod *xdomain_dispatch;
45 typedef struct _MonoRemotingMethods MonoRemotingMethods;
48 mono_remoting_wrapper (MonoMethod *method, gpointer *params);
51 mono_marshal_set_domain_by_id (gint32 id, MonoBoolean push);
54 mono_marshal_check_domain_image (gint32 domain_id, MonoImage *image);
57 mono_upgrade_remote_class_wrapper (MonoReflectionType *rtype, MonoTransparentProxy *tproxy);
59 static MonoXDomainMarshalType
60 mono_get_xdomain_marshal_type (MonoType *t);
63 mono_marshal_xdomain_copy_out_value (MonoObject *src, MonoObject *dst);
65 static MonoReflectionType *
66 type_from_handle (MonoType *handle);
68 static mono_mutex_t remoting_mutex;
69 static gboolean remoting_mutex_inited;
71 static MonoClass *byte_array_class;
72 static MonoMethod *method_rs_serialize, *method_rs_deserialize, *method_exc_fixexc, *method_rs_appdomain_target;
73 static MonoMethod *method_set_call_context, *method_needs_context_sink, *method_rs_serialize_exc;
76 register_icall (gpointer func, const char *name, const char *sigstr, gboolean save)
78 MonoMethodSignature *sig = mono_create_icall_signature (sigstr);
80 mono_register_jit_icall (func, name, sig, save);
86 g_assert (remoting_mutex_inited);
87 mono_mutex_lock (&remoting_mutex);
91 remoting_unlock (void)
93 g_assert (remoting_mutex_inited);
94 mono_mutex_unlock (&remoting_mutex);
98 * Return the hash table pointed to by VAR, lazily creating it if neccesary.
101 get_cache (GHashTable **var, GHashFunc hash_func, GCompareFunc equal_func)
107 g_hash_table_new (hash_func, equal_func);
108 mono_memory_barrier ();
117 get_cache_full (GHashTable **var, GHashFunc hash_func, GCompareFunc equal_func, GDestroyNotify key_destroy_func, GDestroyNotify value_destroy_func)
123 g_hash_table_new_full (hash_func, equal_func, key_destroy_func, value_destroy_func);
124 mono_memory_barrier ();
133 mono_remoting_init (void)
135 mono_mutex_init (&remoting_mutex);
136 remoting_mutex_inited = TRUE;
140 mono_remoting_marshal_init (void)
144 static gboolean module_initialized = FALSE;
145 static gboolean icalls_registered = FALSE;
147 if (module_initialized)
150 klass = mono_class_from_name (mono_defaults.corlib, "System.Runtime.Remoting", "RemotingServices");
151 method_rs_serialize = mono_class_get_method_from_name (klass, "SerializeCallData", -1);
152 method_rs_deserialize = mono_class_get_method_from_name (klass, "DeserializeCallData", -1);
153 method_rs_serialize_exc = mono_class_get_method_from_name (klass, "SerializeExceptionData", -1);
155 klass = mono_defaults.real_proxy_class;
156 method_rs_appdomain_target = mono_class_get_method_from_name (klass, "GetAppDomainTarget", -1);
158 klass = mono_defaults.exception_class;
159 method_exc_fixexc = mono_class_get_method_from_name (klass, "FixRemotingException", -1);
161 byte_array_class = mono_array_class_get (mono_defaults.byte_class, 1);
163 klass = mono_class_from_name (mono_defaults.corlib, "System.Runtime.Remoting.Messaging", "CallContext");
164 method_set_call_context = mono_class_get_method_from_name (klass, "SetCurrentCallContext", -1);
166 klass = mono_class_from_name (mono_defaults.corlib, "System.Runtime.Remoting.Contexts", "Context");
167 method_needs_context_sink = mono_class_get_method_from_name (klass, "get_NeedsContextSink", -1);
171 if (!icalls_registered) {
172 register_icall (type_from_handle, "type_from_handle", "object ptr", FALSE);
173 register_icall (mono_marshal_set_domain_by_id, "mono_marshal_set_domain_by_id", "int32 int32 int32", FALSE);
174 register_icall (mono_marshal_check_domain_image, "mono_marshal_check_domain_image", "int32 int32 ptr", FALSE);
175 register_icall (mono_marshal_xdomain_copy_value, "mono_marshal_xdomain_copy_value", "object object", FALSE);
176 register_icall (mono_marshal_xdomain_copy_out_value, "mono_marshal_xdomain_copy_out_value", "void object object", FALSE);
177 register_icall (mono_remoting_wrapper, "mono_remoting_wrapper", "object ptr ptr", FALSE);
178 register_icall (mono_upgrade_remote_class_wrapper, "mono_upgrade_remote_class_wrapper", "void object object", FALSE);
181 icalls_registered = TRUE;
183 mono_loader_unlock ();
185 module_initialized = TRUE;
188 static MonoReflectionType *
189 type_from_handle (MonoType *handle)
191 MonoDomain *domain = mono_domain_get ();
192 MonoClass *klass = mono_class_from_mono_type (handle);
194 mono_class_init (klass);
195 return mono_type_get_object (domain, handle);
200 mono_mb_emit_proxy_check (MonoMethodBuilder *mb, int branch_code)
203 mono_mb_emit_ldflda (mb, MONO_STRUCT_OFFSET (MonoObject, vtable));
204 mono_mb_emit_byte (mb, CEE_LDIND_I);
205 mono_mb_emit_icon (mb, MONO_STRUCT_OFFSET (MonoVTable, klass));
206 mono_mb_emit_byte (mb, CEE_ADD);
207 mono_mb_emit_byte (mb, CEE_LDIND_I);
208 mono_mb_emit_byte (mb, MONO_CUSTOM_PREFIX);
209 mono_mb_emit_byte (mb, CEE_MONO_CLASSCONST);
210 mono_mb_emit_i4 (mb, mono_mb_add_data (mb, mono_defaults.transparent_proxy_class));
211 pos = mono_mb_emit_branch (mb, branch_code);
216 mono_mb_emit_xdomain_check (MonoMethodBuilder *mb, int branch_code)
219 mono_mb_emit_ldflda (mb, MONO_STRUCT_OFFSET (MonoTransparentProxy, rp));
220 mono_mb_emit_byte (mb, CEE_LDIND_REF);
221 mono_mb_emit_ldflda (mb, MONO_STRUCT_OFFSET (MonoRealProxy, target_domain_id));
222 mono_mb_emit_byte (mb, CEE_LDIND_I4);
223 mono_mb_emit_icon (mb, -1);
224 pos = mono_mb_emit_branch (mb, branch_code);
229 mono_mb_emit_contextbound_check (MonoMethodBuilder *mb, int branch_code)
231 static int offset = -1;
235 mono_marshal_find_bitfield_offset (MonoClass, contextbound, &offset, &mask);
237 mono_mb_emit_ldflda (mb, MONO_STRUCT_OFFSET (MonoTransparentProxy, remote_class));
238 mono_mb_emit_byte (mb, CEE_LDIND_REF);
239 mono_mb_emit_ldflda (mb, MONO_STRUCT_OFFSET (MonoRemoteClass, proxy_class));
240 mono_mb_emit_byte (mb, CEE_LDIND_REF);
241 mono_mb_emit_ldflda (mb, offset);
242 mono_mb_emit_byte (mb, CEE_LDIND_U1);
243 mono_mb_emit_icon (mb, mask);
244 mono_mb_emit_byte (mb, CEE_AND);
245 mono_mb_emit_icon (mb, 0);
246 return mono_mb_emit_branch (mb, branch_code);
248 #endif /* !DISABLE_JIT */
250 static inline MonoMethod*
251 mono_marshal_remoting_find_in_cache (MonoMethod *method, int wrapper_type)
253 MonoMethod *res = NULL;
254 MonoRemotingMethods *wrps;
256 mono_marshal_lock_internal ();
257 if (method->klass->image->remoting_invoke_cache)
258 wrps = g_hash_table_lookup (method->klass->image->remoting_invoke_cache, method);
263 switch (wrapper_type) {
264 case MONO_WRAPPER_REMOTING_INVOKE: res = wrps->invoke; break;
265 case MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK: res = wrps->invoke_with_check; break;
266 case MONO_WRAPPER_XDOMAIN_INVOKE: res = wrps->xdomain_invoke; break;
267 case MONO_WRAPPER_XDOMAIN_DISPATCH: res = wrps->xdomain_dispatch; break;
271 /* it is important to do the unlock after the load from wrps, since in
272 * mono_remoting_mb_create_and_cache () we drop the marshal lock to be able
273 * to take the loader lock and some other thread may set the fields.
275 mono_marshal_unlock_internal ();
279 /* Create the method from the builder and place it in the cache */
280 static inline MonoMethod*
281 mono_remoting_mb_create_and_cache (MonoMethod *key, MonoMethodBuilder *mb,
282 MonoMethodSignature *sig, int max_stack)
284 MonoMethod **res = NULL;
285 MonoRemotingMethods *wrps;
286 GHashTable *cache = get_cache_full (&key->klass->image->remoting_invoke_cache, mono_aligned_addr_hash, NULL, NULL, g_free);
288 mono_marshal_lock_internal ();
289 wrps = g_hash_table_lookup (cache, key);
291 wrps = g_new0 (MonoRemotingMethods, 1);
292 g_hash_table_insert (cache, key, wrps);
295 switch (mb->method->wrapper_type) {
296 case MONO_WRAPPER_REMOTING_INVOKE: res = &wrps->invoke; break;
297 case MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK: res = &wrps->invoke_with_check; break;
298 case MONO_WRAPPER_XDOMAIN_INVOKE: res = &wrps->xdomain_invoke; break;
299 case MONO_WRAPPER_XDOMAIN_DISPATCH: res = &wrps->xdomain_dispatch; break;
300 default: g_assert_not_reached (); break;
302 mono_marshal_unlock_internal ();
306 newm = mono_mb_create_method (mb, sig, max_stack);
308 mono_marshal_lock_internal ();
311 mono_marshal_set_wrapper_info (*res, key);
312 mono_marshal_unlock_internal ();
314 mono_marshal_unlock_internal ();
315 mono_free_method (newm);
323 mono_remoting_wrapper (MonoMethod *method, gpointer *params)
325 MonoMethodMessage *msg;
326 MonoTransparentProxy *this;
327 MonoObject *res, *exc;
330 this = *((MonoTransparentProxy **)params [0]);
333 g_assert (((MonoObject *)this)->vtable->klass == mono_defaults.transparent_proxy_class);
335 /* skip the this pointer */
338 if (mono_class_is_contextbound (this->remote_class->proxy_class) && this->rp->context == (MonoObject *) mono_context_get ())
341 MonoMethodSignature *sig = mono_method_signature (method);
342 int count = sig->param_count;
343 gpointer* mparams = (gpointer*) alloca(count*sizeof(gpointer));
345 for (i=0; i<count; i++) {
346 MonoClass *class = mono_class_from_mono_type (sig->params [i]);
347 if (class->valuetype) {
348 if (sig->params [i]->byref) {
349 mparams[i] = *((gpointer *)params [i]);
351 /* runtime_invoke expects a boxed instance */
352 if (mono_class_is_nullable (mono_class_from_mono_type (sig->params [i])))
353 mparams[i] = mono_nullable_box (params [i], class);
355 mparams[i] = params [i];
358 mparams[i] = *((gpointer**)params [i]);
362 return mono_runtime_invoke (method, method->klass->valuetype? mono_object_unbox ((MonoObject*)this): this, mparams, NULL);
365 msg = mono_method_call_message_new (method, params, NULL, NULL, NULL);
367 res = mono_remoting_invoke ((MonoObject *)this->rp, msg, &exc, &out_args);
370 mono_raise_exception ((MonoException *)exc);
372 mono_method_return_message_restore (method, params, out_args);
378 mono_marshal_get_remoting_invoke (MonoMethod *method)
380 MonoMethodSignature *sig;
381 MonoMethodBuilder *mb;
387 if (method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE || method->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE)
390 /* this seems to be the best plase to put this, as all remoting invokes seem to get filtered through here */
392 if (mono_class_is_com_object (method->klass) || method->klass == mono_class_get_com_object_class ()) {
393 MonoVTable *vtable = mono_class_vtable (mono_domain_get (), method->klass);
394 g_assert (vtable); /*FIXME do proper error handling*/
396 if (!mono_vtable_is_remote (vtable)) {
397 return mono_cominterop_get_invoke (method);
402 sig = mono_signature_no_pinvoke (method);
404 /* we cant remote methods without this pointer */
408 if ((res = mono_marshal_remoting_find_in_cache (method, MONO_WRAPPER_REMOTING_INVOKE)))
411 mono_remoting_marshal_init ();
413 mb = mono_mb_new (method->klass, method->name, MONO_WRAPPER_REMOTING_INVOKE);
416 mb->method->save_lmf = 1;
418 params_var = mono_mb_emit_save_args (mb, sig, TRUE);
420 mono_mb_emit_ptr (mb, method);
421 mono_mb_emit_ldloc (mb, params_var);
422 mono_mb_emit_icall (mb, mono_remoting_wrapper);
423 mono_marshal_emit_thread_interrupt_checkpoint (mb);
425 if (sig->ret->type == MONO_TYPE_VOID) {
426 mono_mb_emit_byte (mb, CEE_POP);
427 mono_mb_emit_byte (mb, CEE_RET);
429 mono_mb_emit_restore_result (mb, sig->ret);
433 res = mono_remoting_mb_create_and_cache (method, mb, sig, sig->param_count + 16);
439 /* mono_marshal_xdomain_copy_out_value()
440 * Copies the contents of the src instance into the dst instance. src and dst
441 * must have the same type, and if they are arrays, the same size.
444 mono_marshal_xdomain_copy_out_value (MonoObject *src, MonoObject *dst)
446 if (src == NULL || dst == NULL) return;
448 g_assert (mono_object_class (src) == mono_object_class (dst));
450 switch (mono_object_class (src)->byval_arg.type) {
451 case MONO_TYPE_ARRAY:
452 case MONO_TYPE_SZARRAY: {
453 int mt = mono_get_xdomain_marshal_type (&(mono_object_class (src)->element_class->byval_arg));
454 if (mt == MONO_MARSHAL_SERIALIZE) return;
455 if (mt == MONO_MARSHAL_COPY) {
456 int i, len = mono_array_length ((MonoArray *)dst);
457 for (i = 0; i < len; i++) {
458 MonoObject *item = mono_array_get ((MonoArray *)src, gpointer, i);
459 mono_array_setref ((MonoArray *)dst, i, mono_marshal_xdomain_copy_value (item));
462 mono_array_full_copy ((MonoArray *)src, (MonoArray *)dst);
470 if (mono_object_class (src) == mono_defaults.stringbuilder_class) {
471 MonoStringBuilder *src_sb = (MonoStringBuilder *) src;
472 MonoStringBuilder *dst_sb = (MonoStringBuilder *) dst;
474 MONO_OBJECT_SETREF (dst_sb, str, mono_string_new_utf16 (mono_object_domain (dst), mono_string_chars (src_sb->str), mono_string_length (src_sb->str)));
475 dst_sb->cached_str = NULL;
476 dst_sb->length = src_sb->length;
481 #if !defined (DISABLE_JIT)
483 mono_marshal_emit_xdomain_copy_value (MonoMethodBuilder *mb, MonoClass *pclass)
485 mono_mb_emit_icall (mb, mono_marshal_xdomain_copy_value);
486 mono_mb_emit_op (mb, CEE_CASTCLASS, pclass);
490 mono_marshal_emit_xdomain_copy_out_value (MonoMethodBuilder *mb, MonoClass *pclass)
492 mono_mb_emit_icall (mb, mono_marshal_xdomain_copy_out_value);
496 /* mono_marshal_supports_fast_xdomain()
497 * Returns TRUE if the method can use the fast xdomain wrapper.
500 mono_marshal_supports_fast_xdomain (MonoMethod *method)
502 return !mono_class_is_contextbound (method->klass) &&
503 !((method->flags & METHOD_ATTRIBUTE_SPECIAL_NAME) && (strcmp (".ctor", method->name) == 0));
507 mono_marshal_set_domain_by_id (gint32 id, MonoBoolean push)
509 MonoDomain *current_domain = mono_domain_get ();
510 MonoDomain *domain = mono_domain_get_by_id (id);
512 if (!domain || !mono_domain_set (domain, FALSE))
513 mono_raise_exception (mono_get_exception_appdomain_unloaded ());
516 mono_thread_push_appdomain_ref (domain);
518 mono_thread_pop_appdomain_ref ();
520 return current_domain->domain_id;
523 #if !defined (DISABLE_JIT)
525 mono_marshal_emit_switch_domain (MonoMethodBuilder *mb)
527 mono_mb_emit_icall (mb, mono_marshal_set_domain_by_id);
530 /* mono_marshal_emit_load_domain_method ()
531 * Loads into the stack a pointer to the code of the provided method for
532 * the current domain.
535 mono_marshal_emit_load_domain_method (MonoMethodBuilder *mb, MonoMethod *method)
537 /* We need a pointer to the method for the running domain (not the domain
538 * that compiles the method).
540 mono_mb_emit_ptr (mb, method);
541 mono_mb_emit_icall (mb, mono_compile_method);
545 /* mono_marshal_check_domain_image ()
546 * Returns TRUE if the image is loaded in the specified
547 * application domain.
550 mono_marshal_check_domain_image (gint32 domain_id, MonoImage *image)
555 MonoDomain *domain = mono_domain_get_by_id (domain_id);
559 mono_domain_assemblies_lock (domain);
560 for (tmp = domain->domain_assemblies; tmp; tmp = tmp->next) {
562 if (ass->image == image)
565 mono_domain_assemblies_unlock (domain);
570 /* mono_marshal_get_xappdomain_dispatch ()
571 * Generates a method that dispatches a method call from another domain into
572 * the current domain.
575 mono_marshal_get_xappdomain_dispatch (MonoMethod *method, int *marshal_types, int complex_count, int complex_out_count, int ret_marshal_type)
577 MonoMethodSignature *sig, *csig;
578 MonoMethodBuilder *mb;
580 int i, j, param_index, copy_locals_base;
581 MonoClass *ret_class = NULL;
582 int loc_array=0, loc_return=0, loc_serialized_exc=0;
583 MonoExceptionClause *main_clause;
585 gboolean copy_return;
587 if ((res = mono_marshal_remoting_find_in_cache (method, MONO_WRAPPER_XDOMAIN_DISPATCH)))
590 sig = mono_method_signature (method);
591 copy_return = (sig->ret->type != MONO_TYPE_VOID && ret_marshal_type != MONO_MARSHAL_SERIALIZE);
594 csig = mono_metadata_signature_alloc (mono_defaults.corlib, 3 + sig->param_count - complex_count);
595 csig->params [j++] = &mono_defaults.object_class->byval_arg;
596 csig->params [j++] = &byte_array_class->this_arg;
597 csig->params [j++] = &byte_array_class->this_arg;
598 for (i = 0; i < sig->param_count; i++) {
599 if (marshal_types [i] != MONO_MARSHAL_SERIALIZE)
600 csig->params [j++] = sig->params [i];
603 csig->ret = sig->ret;
605 csig->ret = &mono_defaults.void_class->byval_arg;
607 csig->hasthis = FALSE;
609 mb = mono_mb_new (method->klass, method->name, MONO_WRAPPER_XDOMAIN_DISPATCH);
610 mb->method->save_lmf = 1;
615 loc_serialized_exc = mono_mb_add_local (mb, &byte_array_class->byval_arg);
616 if (complex_count > 0)
617 loc_array = mono_mb_add_local (mb, &mono_defaults.object_class->byval_arg);
618 if (sig->ret->type != MONO_TYPE_VOID) {
619 loc_return = mono_mb_add_local (mb, sig->ret);
620 ret_class = mono_class_from_mono_type (sig->ret);
625 main_clause = mono_image_alloc0 (method->klass->image, sizeof (MonoExceptionClause));
626 main_clause->try_offset = mono_mb_get_label (mb);
628 /* Clean the call context */
630 mono_mb_emit_byte (mb, CEE_LDNULL);
631 mono_mb_emit_managed_call (mb, method_set_call_context, NULL);
632 mono_mb_emit_byte (mb, CEE_POP);
634 /* Deserialize call data */
636 mono_mb_emit_ldarg (mb, 1);
637 mono_mb_emit_byte (mb, CEE_LDIND_REF);
638 mono_mb_emit_byte (mb, CEE_DUP);
639 pos = mono_mb_emit_short_branch (mb, CEE_BRFALSE_S);
641 mono_marshal_emit_xdomain_copy_value (mb, byte_array_class);
642 mono_mb_emit_managed_call (mb, method_rs_deserialize, NULL);
644 if (complex_count > 0)
645 mono_mb_emit_stloc (mb, loc_array);
647 mono_mb_emit_byte (mb, CEE_POP);
649 mono_mb_patch_short_branch (mb, pos);
651 /* Get the target object */
653 mono_mb_emit_ldarg (mb, 0);
654 mono_mb_emit_managed_call (mb, method_rs_appdomain_target, NULL);
656 /* Load the arguments */
658 copy_locals_base = mb->locals;
659 param_index = 3; // Index of the first non-serialized parameter of this wrapper
661 for (i = 0; i < sig->param_count; i++) {
662 MonoType *pt = sig->params [i];
663 MonoClass *pclass = mono_class_from_mono_type (pt);
664 switch (marshal_types [i]) {
665 case MONO_MARSHAL_SERIALIZE: {
666 /* take the value from the serialized array */
667 mono_mb_emit_ldloc (mb, loc_array);
668 mono_mb_emit_icon (mb, j++);
670 if (pclass->valuetype) {
671 mono_mb_emit_byte (mb, CEE_LDELEM_REF);
672 mono_mb_emit_op (mb, CEE_UNBOX, pclass);
674 mono_mb_emit_op (mb, CEE_LDELEMA, pclass);
677 if (pclass->valuetype) {
678 mono_mb_emit_byte (mb, CEE_LDELEM_REF);
679 mono_mb_emit_op (mb, CEE_UNBOX, pclass);
680 mono_mb_emit_op (mb, CEE_LDOBJ, pclass);
682 mono_mb_emit_byte (mb, CEE_LDELEM_REF);
683 if (pclass != mono_defaults.object_class) {
684 mono_mb_emit_op (mb, CEE_CASTCLASS, pclass);
690 case MONO_MARSHAL_COPY_OUT: {
691 /* Keep a local copy of the value since we need to copy it back after the call */
692 int copy_local = mono_mb_add_local (mb, &(pclass->byval_arg));
693 mono_mb_emit_ldarg (mb, param_index++);
694 mono_marshal_emit_xdomain_copy_value (mb, pclass);
695 mono_mb_emit_byte (mb, CEE_DUP);
696 mono_mb_emit_stloc (mb, copy_local);
699 case MONO_MARSHAL_COPY: {
700 mono_mb_emit_ldarg (mb, param_index);
702 mono_mb_emit_byte (mb, CEE_DUP);
703 mono_mb_emit_byte (mb, CEE_DUP);
704 mono_mb_emit_byte (mb, CEE_LDIND_REF);
705 mono_marshal_emit_xdomain_copy_value (mb, pclass);
706 mono_mb_emit_byte (mb, CEE_STIND_REF);
708 mono_marshal_emit_xdomain_copy_value (mb, pclass);
713 case MONO_MARSHAL_NONE:
714 mono_mb_emit_ldarg (mb, param_index++);
719 /* Make the call to the real object */
721 mono_marshal_emit_thread_force_interrupt_checkpoint (mb);
723 mono_mb_emit_op (mb, CEE_CALLVIRT, method);
725 if (sig->ret->type != MONO_TYPE_VOID)
726 mono_mb_emit_stloc (mb, loc_return);
728 /* copy back MONO_MARSHAL_COPY_OUT parameters */
732 for (i = 0; i < sig->param_count; i++) {
733 if (marshal_types [i] == MONO_MARSHAL_SERIALIZE) continue;
734 if (marshal_types [i] == MONO_MARSHAL_COPY_OUT) {
735 mono_mb_emit_ldloc (mb, copy_locals_base + (j++));
736 mono_mb_emit_ldarg (mb, param_index);
737 mono_marshal_emit_xdomain_copy_out_value (mb, mono_class_from_mono_type (sig->params [i]));
742 /* Serialize the return values */
744 if (complex_out_count > 0) {
745 /* Reset parameters in the array that don't need to be serialized back */
747 for (i = 0; i < sig->param_count; i++) {
748 if (marshal_types[i] != MONO_MARSHAL_SERIALIZE) continue;
749 if (!sig->params [i]->byref) {
750 mono_mb_emit_ldloc (mb, loc_array);
751 mono_mb_emit_icon (mb, j);
752 mono_mb_emit_byte (mb, CEE_LDNULL);
753 mono_mb_emit_byte (mb, CEE_STELEM_REF);
758 /* Add the return value to the array */
760 if (ret_marshal_type == MONO_MARSHAL_SERIALIZE) {
761 mono_mb_emit_ldloc (mb, loc_array);
762 mono_mb_emit_icon (mb, complex_count); /* The array has an additional slot to hold the ret value */
763 mono_mb_emit_ldloc (mb, loc_return);
765 g_assert (ret_class); /*FIXME properly fail here*/
766 if (ret_class->valuetype) {
767 mono_mb_emit_op (mb, CEE_BOX, ret_class);
769 mono_mb_emit_byte (mb, CEE_STELEM_REF);
774 mono_mb_emit_ldarg (mb, 1);
775 mono_mb_emit_ldloc (mb, loc_array);
776 mono_mb_emit_managed_call (mb, method_rs_serialize, NULL);
777 mono_mb_emit_byte (mb, CEE_STIND_REF);
778 } else if (ret_marshal_type == MONO_MARSHAL_SERIALIZE) {
779 mono_mb_emit_ldarg (mb, 1);
780 mono_mb_emit_ldloc (mb, loc_return);
781 if (ret_class->valuetype) {
782 mono_mb_emit_op (mb, CEE_BOX, ret_class);
784 mono_mb_emit_managed_call (mb, method_rs_serialize, NULL);
785 mono_mb_emit_byte (mb, CEE_STIND_REF);
787 mono_mb_emit_ldarg (mb, 1);
788 mono_mb_emit_byte (mb, CEE_LDNULL);
789 mono_mb_emit_managed_call (mb, method_rs_serialize, NULL);
790 mono_mb_emit_byte (mb, CEE_STIND_REF);
793 mono_mb_emit_ldarg (mb, 2);
794 mono_mb_emit_byte (mb, CEE_LDNULL);
795 mono_mb_emit_byte (mb, CEE_STIND_REF);
796 pos_leave = mono_mb_emit_branch (mb, CEE_LEAVE);
798 /* Main exception catch */
799 main_clause->flags = MONO_EXCEPTION_CLAUSE_NONE;
800 main_clause->try_len = mono_mb_get_pos (mb) - main_clause->try_offset;
801 main_clause->data.catch_class = mono_defaults.object_class;
804 main_clause->handler_offset = mono_mb_get_label (mb);
805 mono_mb_emit_managed_call (mb, method_rs_serialize_exc, NULL);
806 mono_mb_emit_stloc (mb, loc_serialized_exc);
807 mono_mb_emit_ldarg (mb, 2);
808 mono_mb_emit_ldloc (mb, loc_serialized_exc);
809 mono_mb_emit_byte (mb, CEE_STIND_REF);
810 mono_mb_emit_branch (mb, CEE_LEAVE);
811 main_clause->handler_len = mono_mb_get_pos (mb) - main_clause->handler_offset;
814 mono_mb_patch_branch (mb, pos_leave);
817 mono_mb_emit_ldloc (mb, loc_return);
819 mono_mb_emit_byte (mb, CEE_RET);
821 mono_mb_set_clauses (mb, 1, main_clause);
824 res = mono_remoting_mb_create_and_cache (method, mb, csig, csig->param_count + 16);
830 /* mono_marshal_get_xappdomain_invoke ()
831 * Generates a fast remoting wrapper for cross app domain calls.
834 mono_marshal_get_xappdomain_invoke (MonoMethod *method)
836 MonoMethodSignature *sig;
837 MonoMethodBuilder *mb;
839 int i, j, complex_count, complex_out_count, copy_locals_base;
841 MonoClass *ret_class = NULL;
842 MonoMethod *xdomain_method;
843 int ret_marshal_type = MONO_MARSHAL_NONE;
844 int loc_array=0, loc_serialized_data=-1, loc_real_proxy;
845 int loc_old_domainid, loc_domainid, loc_return=0, loc_serialized_exc=0, loc_context;
846 int pos, pos_dispatch, pos_noex;
847 gboolean copy_return = FALSE;
851 if (method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE || method->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE)
854 /* we cant remote methods without this pointer */
855 if (!mono_method_signature (method)->hasthis)
858 mono_remoting_marshal_init ();
860 if (!mono_marshal_supports_fast_xdomain (method))
861 return mono_marshal_get_remoting_invoke (method);
863 if ((res = mono_marshal_remoting_find_in_cache (method, MONO_WRAPPER_XDOMAIN_INVOKE)))
866 sig = mono_signature_no_pinvoke (method);
868 mb = mono_mb_new (method->klass, method->name, MONO_WRAPPER_XDOMAIN_INVOKE);
869 mb->method->save_lmf = 1;
871 /* Count the number of parameters that need to be serialized */
873 marshal_types = alloca (sizeof (int) * sig->param_count);
874 complex_count = complex_out_count = 0;
875 for (i = 0; i < sig->param_count; i++) {
876 MonoType *ptype = sig->params[i];
877 int mt = mono_get_xdomain_marshal_type (ptype);
879 /* If the [Out] attribute is applied to a parameter that can be internally copied,
880 * the copy will be made by reusing the original object instance
882 if ((ptype->attrs & PARAM_ATTRIBUTE_OUT) != 0 && mt == MONO_MARSHAL_COPY && !ptype->byref)
883 mt = MONO_MARSHAL_COPY_OUT;
884 else if (mt == MONO_MARSHAL_SERIALIZE) {
886 if (ptype->byref) complex_out_count++;
888 marshal_types [i] = mt;
891 if (sig->ret->type != MONO_TYPE_VOID) {
892 ret_marshal_type = mono_get_xdomain_marshal_type (sig->ret);
893 ret_class = mono_class_from_mono_type (sig->ret);
894 copy_return = ret_marshal_type != MONO_MARSHAL_SERIALIZE;
900 if (complex_count > 0)
901 loc_array = mono_mb_add_local (mb, &mono_defaults.object_class->byval_arg);
902 loc_serialized_data = mono_mb_add_local (mb, &byte_array_class->byval_arg);
903 loc_real_proxy = mono_mb_add_local (mb, &mono_defaults.object_class->byval_arg);
905 loc_return = mono_mb_add_local (mb, sig->ret);
906 loc_old_domainid = mono_mb_add_local (mb, &mono_defaults.int32_class->byval_arg);
907 loc_domainid = mono_mb_add_local (mb, &mono_defaults.int32_class->byval_arg);
908 loc_serialized_exc = mono_mb_add_local (mb, &byte_array_class->byval_arg);
909 loc_context = mono_mb_add_local (mb, &mono_defaults.object_class->byval_arg);
911 /* Save thread domain data */
913 mono_mb_emit_icall (mb, mono_context_get);
914 mono_mb_emit_byte (mb, CEE_DUP);
915 mono_mb_emit_stloc (mb, loc_context);
917 /* If the thread is not running in the default context, it needs to go
918 * through the whole remoting sink, since the context is going to change
920 mono_mb_emit_managed_call (mb, method_needs_context_sink, NULL);
921 pos = mono_mb_emit_short_branch (mb, CEE_BRTRUE_S);
923 /* Another case in which the fast path can't be used: when the target domain
924 * has a different image for the same assembly.
927 /* Get the target domain id */
929 mono_mb_emit_ldarg (mb, 0);
930 mono_mb_emit_ldflda (mb, MONO_STRUCT_OFFSET (MonoTransparentProxy, rp));
931 mono_mb_emit_byte (mb, CEE_LDIND_REF);
932 mono_mb_emit_byte (mb, CEE_DUP);
933 mono_mb_emit_stloc (mb, loc_real_proxy);
935 mono_mb_emit_ldflda (mb, MONO_STRUCT_OFFSET (MonoRealProxy, target_domain_id));
936 mono_mb_emit_byte (mb, CEE_LDIND_I4);
937 mono_mb_emit_stloc (mb, loc_domainid);
939 /* Check if the target domain has the same image for the required assembly */
941 mono_mb_emit_ldloc (mb, loc_domainid);
942 mono_mb_emit_ptr (mb, method->klass->image);
943 mono_mb_emit_icall (mb, mono_marshal_check_domain_image);
944 pos_dispatch = mono_mb_emit_short_branch (mb, CEE_BRTRUE_S);
946 /* Use the whole remoting sink to dispatch this message */
948 mono_mb_patch_short_branch (mb, pos);
950 mono_mb_emit_ldarg (mb, 0);
951 for (i = 0; i < sig->param_count; i++)
952 mono_mb_emit_ldarg (mb, i + 1);
954 mono_mb_emit_managed_call (mb, mono_marshal_get_remoting_invoke (method), NULL);
955 mono_mb_emit_byte (mb, CEE_RET);
956 mono_mb_patch_short_branch (mb, pos_dispatch);
958 /* Create the array that will hold the parameters to be serialized */
960 if (complex_count > 0) {
961 mono_mb_emit_icon (mb, (ret_marshal_type == MONO_MARSHAL_SERIALIZE && complex_out_count > 0) ? complex_count + 1 : complex_count); /* +1 for the return type */
962 mono_mb_emit_op (mb, CEE_NEWARR, mono_defaults.object_class);
965 for (i = 0; i < sig->param_count; i++) {
967 if (marshal_types [i] != MONO_MARSHAL_SERIALIZE) continue;
968 pclass = mono_class_from_mono_type (sig->params[i]);
969 mono_mb_emit_byte (mb, CEE_DUP);
970 mono_mb_emit_icon (mb, j);
971 mono_mb_emit_ldarg (mb, i + 1); /* 0=this */
972 if (sig->params[i]->byref) {
973 if (pclass->valuetype)
974 mono_mb_emit_op (mb, CEE_LDOBJ, pclass);
976 mono_mb_emit_byte (mb, CEE_LDIND_REF);
978 if (pclass->valuetype)
979 mono_mb_emit_op (mb, CEE_BOX, pclass);
980 mono_mb_emit_byte (mb, CEE_STELEM_REF);
983 mono_mb_emit_stloc (mb, loc_array);
985 /* Serialize parameters */
987 mono_mb_emit_ldloc (mb, loc_array);
988 mono_mb_emit_managed_call (mb, method_rs_serialize, NULL);
989 mono_mb_emit_stloc (mb, loc_serialized_data);
991 mono_mb_emit_byte (mb, CEE_LDNULL);
992 mono_mb_emit_managed_call (mb, method_rs_serialize, NULL);
993 mono_mb_emit_stloc (mb, loc_serialized_data);
998 mono_mb_emit_ldloc (mb, loc_domainid);
999 mono_mb_emit_byte (mb, CEE_LDC_I4_1);
1000 mono_marshal_emit_switch_domain (mb);
1001 mono_mb_emit_stloc (mb, loc_old_domainid);
1003 /* Load the arguments */
1005 mono_mb_emit_ldloc (mb, loc_real_proxy);
1006 mono_mb_emit_ldloc_addr (mb, loc_serialized_data);
1007 mono_mb_emit_ldloc_addr (mb, loc_serialized_exc);
1009 copy_locals_base = mb->locals;
1010 for (i = 0; i < sig->param_count; i++) {
1011 switch (marshal_types [i]) {
1012 case MONO_MARSHAL_SERIALIZE:
1014 case MONO_MARSHAL_COPY: {
1015 mono_mb_emit_ldarg (mb, i+1);
1016 if (sig->params [i]->byref) {
1017 /* make a local copy of the byref parameter. The real parameter
1018 * will be updated after the xdomain call
1020 MonoClass *pclass = mono_class_from_mono_type (sig->params [i]);
1021 int copy_local = mono_mb_add_local (mb, &(pclass->byval_arg));
1022 mono_mb_emit_byte (mb, CEE_LDIND_REF);
1023 mono_mb_emit_stloc (mb, copy_local);
1024 mono_mb_emit_ldloc_addr (mb, copy_local);
1028 case MONO_MARSHAL_COPY_OUT:
1029 case MONO_MARSHAL_NONE:
1030 mono_mb_emit_ldarg (mb, i+1);
1035 /* Make the call to the invoke wrapper in the target domain */
1037 xdomain_method = mono_marshal_get_xappdomain_dispatch (method, marshal_types, complex_count, complex_out_count, ret_marshal_type);
1038 mono_marshal_emit_load_domain_method (mb, xdomain_method);
1039 mono_mb_emit_calli (mb, mono_method_signature (xdomain_method));
1042 mono_mb_emit_stloc (mb, loc_return);
1046 mono_mb_emit_ldloc (mb, loc_old_domainid);
1047 mono_mb_emit_byte (mb, CEE_LDC_I4_0);
1048 mono_marshal_emit_switch_domain (mb);
1049 mono_mb_emit_byte (mb, CEE_POP);
1051 /* Restore thread domain data */
1053 mono_mb_emit_ldloc (mb, loc_context);
1054 mono_mb_emit_icall (mb, mono_context_set);
1056 /* if (loc_serialized_exc != null) ... */
1058 mono_mb_emit_ldloc (mb, loc_serialized_exc);
1059 pos_noex = mono_mb_emit_short_branch (mb, CEE_BRFALSE_S);
1061 mono_mb_emit_ldloc (mb, loc_serialized_exc);
1062 mono_marshal_emit_xdomain_copy_value (mb, byte_array_class);
1063 mono_mb_emit_managed_call (mb, method_rs_deserialize, NULL);
1064 mono_mb_emit_op (mb, CEE_CASTCLASS, mono_defaults.exception_class);
1065 mono_mb_emit_managed_call (mb, method_exc_fixexc, NULL);
1066 mono_mb_emit_byte (mb, CEE_THROW);
1067 mono_mb_patch_short_branch (mb, pos_noex);
1069 /* copy back non-serialized output parameters */
1072 for (i = 0; i < sig->param_count; i++) {
1073 if (!sig->params [i]->byref || marshal_types [i] != MONO_MARSHAL_COPY) continue;
1074 mono_mb_emit_ldarg (mb, i + 1);
1075 mono_mb_emit_ldloc (mb, copy_locals_base + (j++));
1076 mono_marshal_emit_xdomain_copy_value (mb, mono_class_from_mono_type (sig->params [i]));
1077 mono_mb_emit_byte (mb, CEE_STIND_REF);
1080 /* Deserialize out parameters */
1082 if (complex_out_count > 0) {
1083 mono_mb_emit_ldloc (mb, loc_serialized_data);
1084 mono_marshal_emit_xdomain_copy_value (mb, byte_array_class);
1085 mono_mb_emit_managed_call (mb, method_rs_deserialize, NULL);
1086 mono_mb_emit_stloc (mb, loc_array);
1088 /* Copy back output parameters and return type */
1091 for (i = 0; i < sig->param_count; i++) {
1092 if (marshal_types [i] != MONO_MARSHAL_SERIALIZE) continue;
1093 if (sig->params[i]->byref) {
1094 MonoClass *pclass = mono_class_from_mono_type (sig->params [i]);
1095 mono_mb_emit_ldarg (mb, i + 1);
1096 mono_mb_emit_ldloc (mb, loc_array);
1097 mono_mb_emit_icon (mb, j);
1098 mono_mb_emit_byte (mb, CEE_LDELEM_REF);
1099 if (pclass->valuetype) {
1100 mono_mb_emit_op (mb, CEE_UNBOX, pclass);
1101 mono_mb_emit_op (mb, CEE_LDOBJ, pclass);
1102 mono_mb_emit_op (mb, CEE_STOBJ, pclass);
1104 if (pclass != mono_defaults.object_class)
1105 mono_mb_emit_op (mb, CEE_CASTCLASS, pclass);
1106 mono_mb_emit_byte (mb, CEE_STIND_REF);
1112 if (ret_marshal_type == MONO_MARSHAL_SERIALIZE) {
1113 mono_mb_emit_ldloc (mb, loc_array);
1114 mono_mb_emit_icon (mb, complex_count);
1115 mono_mb_emit_byte (mb, CEE_LDELEM_REF);
1116 if (ret_class->valuetype) {
1117 mono_mb_emit_op (mb, CEE_UNBOX, ret_class);
1118 mono_mb_emit_op (mb, CEE_LDOBJ, ret_class);
1121 } else if (ret_marshal_type == MONO_MARSHAL_SERIALIZE) {
1122 mono_mb_emit_ldloc (mb, loc_serialized_data);
1123 mono_marshal_emit_xdomain_copy_value (mb, byte_array_class);
1124 mono_mb_emit_managed_call (mb, method_rs_deserialize, NULL);
1125 if (ret_class->valuetype) {
1126 mono_mb_emit_op (mb, CEE_UNBOX, ret_class);
1127 mono_mb_emit_op (mb, CEE_LDOBJ, ret_class);
1128 } else if (ret_class != mono_defaults.object_class) {
1129 mono_mb_emit_op (mb, CEE_CASTCLASS, ret_class);
1132 mono_mb_emit_ldloc (mb, loc_serialized_data);
1133 mono_mb_emit_byte (mb, CEE_DUP);
1134 pos = mono_mb_emit_short_branch (mb, CEE_BRFALSE_S);
1135 mono_marshal_emit_xdomain_copy_value (mb, byte_array_class);
1137 mono_mb_patch_short_branch (mb, pos);
1138 mono_mb_emit_managed_call (mb, method_rs_deserialize, NULL);
1139 mono_mb_emit_byte (mb, CEE_POP);
1143 mono_mb_emit_ldloc (mb, loc_return);
1144 if (ret_marshal_type == MONO_MARSHAL_COPY)
1145 mono_marshal_emit_xdomain_copy_value (mb, ret_class);
1148 mono_mb_emit_byte (mb, CEE_RET);
1149 #endif /* DISABLE_JIT */
1151 res = mono_remoting_mb_create_and_cache (method, mb, sig, sig->param_count + 16);
1158 mono_marshal_get_remoting_invoke_for_target (MonoMethod *method, MonoRemotingTarget target_type)
1160 if (target_type == MONO_REMOTING_TARGET_APPDOMAIN) {
1161 return mono_marshal_get_xappdomain_invoke (method);
1162 } else if (target_type == MONO_REMOTING_TARGET_COMINTEROP) {
1164 return mono_cominterop_get_invoke (method);
1166 g_assert_not_reached ();
1169 return mono_marshal_get_remoting_invoke (method);
1175 G_GNUC_UNUSED static gpointer
1176 mono_marshal_load_remoting_wrapper (MonoRealProxy *rp, MonoMethod *method)
1178 if (rp->target_domain_id != -1)
1179 return mono_compile_method (mono_marshal_get_xappdomain_invoke (method));
1181 return mono_compile_method (mono_marshal_get_remoting_invoke (method));
1185 mono_marshal_get_remoting_invoke_with_check (MonoMethod *method)
1187 MonoMethodSignature *sig;
1188 MonoMethodBuilder *mb;
1189 MonoMethod *res, *native;
1190 int i, pos, pos_rem;
1194 if (method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK)
1197 /* we cant remote methods without this pointer */
1198 g_assert (mono_method_signature (method)->hasthis);
1200 if ((res = mono_marshal_remoting_find_in_cache (method, MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK)))
1203 sig = mono_signature_no_pinvoke (method);
1205 mb = mono_mb_new (method->klass, method->name, MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK);
1208 for (i = 0; i <= sig->param_count; i++)
1209 mono_mb_emit_ldarg (mb, i);
1211 mono_mb_emit_ldarg (mb, 0);
1212 pos = mono_mb_emit_proxy_check (mb, CEE_BNE_UN);
1214 if (mono_marshal_supports_fast_xdomain (method)) {
1215 mono_mb_emit_ldarg (mb, 0);
1216 pos_rem = mono_mb_emit_xdomain_check (mb, CEE_BEQ);
1218 /* wrapper for cross app domain calls */
1219 native = mono_marshal_get_xappdomain_invoke (method);
1220 mono_mb_emit_managed_call (mb, native, mono_method_signature (native));
1221 mono_mb_emit_byte (mb, CEE_RET);
1223 mono_mb_patch_branch (mb, pos_rem);
1225 /* wrapper for normal remote calls */
1226 native = mono_marshal_get_remoting_invoke (method);
1227 mono_mb_emit_managed_call (mb, native, mono_method_signature (native));
1228 mono_mb_emit_byte (mb, CEE_RET);
1231 mono_mb_patch_branch (mb, pos);
1232 mono_mb_emit_managed_call (mb, method, mono_method_signature (method));
1233 mono_mb_emit_byte (mb, CEE_RET);
1236 res = mono_remoting_mb_create_and_cache (method, mb, sig, sig->param_count + 16);
1243 * mono_marshal_get_ldfld_remote_wrapper:
1244 * @klass: The return type
1246 * This method generates a wrapper for calling mono_load_remote_field_new.
1247 * The return type is ignored for now, as mono_load_remote_field_new () always
1248 * returns an object. In the future, to optimize some codepaths, we might
1249 * call a different function that takes a pointer to a valuetype, instead.
1252 mono_marshal_get_ldfld_remote_wrapper (MonoClass *klass)
1254 MonoMethodSignature *sig, *csig;
1255 MonoMethodBuilder *mb;
1257 static MonoMethod* cached = NULL;
1259 mono_marshal_lock_internal ();
1261 mono_marshal_unlock_internal ();
1264 mono_marshal_unlock_internal ();
1266 mb = mono_mb_new_no_dup_name (mono_defaults.object_class, "__mono_load_remote_field_new_wrapper", MONO_WRAPPER_LDFLD_REMOTE);
1268 mb->method->save_lmf = 1;
1270 sig = mono_metadata_signature_alloc (mono_defaults.corlib, 3);
1271 sig->params [0] = &mono_defaults.object_class->byval_arg;
1272 sig->params [1] = &mono_defaults.int_class->byval_arg;
1273 sig->params [2] = &mono_defaults.int_class->byval_arg;
1274 sig->ret = &mono_defaults.object_class->byval_arg;
1277 mono_mb_emit_ldarg (mb, 0);
1278 mono_mb_emit_ldarg (mb, 1);
1279 mono_mb_emit_ldarg (mb, 2);
1281 csig = mono_metadata_signature_alloc (mono_defaults.corlib, 3);
1282 csig->params [0] = &mono_defaults.object_class->byval_arg;
1283 csig->params [1] = &mono_defaults.int_class->byval_arg;
1284 csig->params [2] = &mono_defaults.int_class->byval_arg;
1285 csig->ret = &mono_defaults.object_class->byval_arg;
1288 mono_mb_emit_native_call (mb, csig, mono_load_remote_field_new);
1289 mono_marshal_emit_thread_interrupt_checkpoint (mb);
1291 mono_mb_emit_byte (mb, CEE_RET);
1294 mono_marshal_lock_internal ();
1296 mono_marshal_unlock_internal ();
1299 newm = mono_mb_create (mb, sig, 4, NULL);
1300 mono_marshal_lock_internal ();
1305 mono_marshal_unlock_internal ();
1307 mono_marshal_unlock_internal ();
1308 mono_free_method (newm);
1317 * mono_marshal_get_ldfld_wrapper:
1318 * @type: the type of the field
1320 * This method generates a function which can be use to load a field with type
1321 * @type from an object. The generated function has the following signature:
1322 * <@type> ldfld_wrapper (MonoObject *this, MonoClass *class, MonoClassField *field, int offset)
1325 mono_marshal_get_ldfld_wrapper (MonoType *type)
1327 MonoMethodSignature *sig;
1328 MonoMethodBuilder *mb;
1334 int t, pos0, pos1 = 0;
1336 type = mono_type_get_underlying_type (type);
1341 if (type->type == MONO_TYPE_SZARRAY) {
1342 klass = mono_defaults.array_class;
1343 } else if (type->type == MONO_TYPE_VALUETYPE) {
1344 klass = type->data.klass;
1345 } else if (t == MONO_TYPE_OBJECT || t == MONO_TYPE_CLASS || t == MONO_TYPE_STRING) {
1346 klass = mono_defaults.object_class;
1347 } else if (t == MONO_TYPE_PTR || t == MONO_TYPE_FNPTR) {
1348 klass = mono_defaults.int_class;
1349 } else if (t == MONO_TYPE_GENERICINST) {
1350 if (mono_type_generic_inst_is_valuetype (type))
1351 klass = mono_class_from_mono_type (type);
1353 klass = mono_defaults.object_class;
1355 klass = mono_class_from_mono_type (type);
1358 klass = mono_defaults.int_class;
1361 cache = get_cache (&klass->image->ldfld_wrapper_cache, mono_aligned_addr_hash, NULL);
1362 if ((res = mono_marshal_find_in_cache (cache, klass)))
1365 /* we add the %p pointer value of klass because class names are not unique */
1366 name = g_strdup_printf ("__ldfld_wrapper_%p_%s.%s", klass, klass->name_space, klass->name);
1367 mb = mono_mb_new (mono_defaults.object_class, name, MONO_WRAPPER_LDFLD);
1370 sig = mono_metadata_signature_alloc (mono_defaults.corlib, 4);
1371 sig->params [0] = &mono_defaults.object_class->byval_arg;
1372 sig->params [1] = &mono_defaults.int_class->byval_arg;
1373 sig->params [2] = &mono_defaults.int_class->byval_arg;
1374 sig->params [3] = &mono_defaults.int_class->byval_arg;
1375 sig->ret = &klass->byval_arg;
1378 mono_mb_emit_ldarg (mb, 0);
1379 pos0 = mono_mb_emit_proxy_check (mb, CEE_BNE_UN);
1381 mono_mb_emit_ldarg (mb, 0);
1382 mono_mb_emit_ldarg (mb, 1);
1383 mono_mb_emit_ldarg (mb, 2);
1385 mono_mb_emit_managed_call (mb, mono_marshal_get_ldfld_remote_wrapper (klass), NULL);
1388 csig = mono_metadata_signature_alloc (mono_defaults.corlib, 3);
1389 csig->params [0] = &mono_defaults.object_class->byval_arg;
1390 csig->params [1] = &mono_defaults.int_class->byval_arg;
1391 csig->params [2] = &mono_defaults.int_class->byval_arg;
1392 csig->ret = &klass->this_arg;
1395 mono_mb_emit_native_call (mb, csig, mono_load_remote_field_new);
1396 mono_marshal_emit_thread_interrupt_checkpoint (mb);
1399 if (klass->valuetype) {
1400 mono_mb_emit_op (mb, CEE_UNBOX, klass);
1401 pos1 = mono_mb_emit_branch (mb, CEE_BR);
1403 mono_mb_emit_byte (mb, CEE_RET);
1406 mono_mb_patch_branch (mb, pos0);
1408 mono_mb_emit_ldarg (mb, 0);
1409 mono_mb_emit_byte (mb, MONO_CUSTOM_PREFIX);
1410 mono_mb_emit_byte (mb, CEE_MONO_OBJADDR);
1411 mono_mb_emit_ldarg (mb, 3);
1412 mono_mb_emit_byte (mb, CEE_ADD);
1414 if (klass->valuetype)
1415 mono_mb_patch_branch (mb, pos1);
1420 case MONO_TYPE_BOOLEAN:
1421 case MONO_TYPE_CHAR:
1430 case MONO_TYPE_ARRAY:
1431 case MONO_TYPE_SZARRAY:
1432 case MONO_TYPE_OBJECT:
1433 case MONO_TYPE_CLASS:
1434 case MONO_TYPE_STRING:
1438 case MONO_TYPE_FNPTR:
1439 mono_mb_emit_byte (mb, mono_type_to_ldind (type));
1441 case MONO_TYPE_VALUETYPE:
1442 g_assert (!klass->enumtype);
1443 mono_mb_emit_op (mb, CEE_LDOBJ, klass);
1445 case MONO_TYPE_GENERICINST:
1446 if (mono_type_generic_inst_is_valuetype (type)) {
1447 mono_mb_emit_op (mb, CEE_LDOBJ, klass);
1449 mono_mb_emit_byte (mb, CEE_LDIND_REF);
1453 case MONO_TYPE_MVAR:
1454 mono_mb_emit_op (mb, CEE_LDOBJ, klass);
1457 g_warning ("type %x not implemented", type->type);
1458 g_assert_not_reached ();
1461 mono_mb_emit_byte (mb, CEE_RET);
1462 #endif /* DISABLE_JIT */
1464 info = mono_wrapper_info_create (mb, WRAPPER_SUBTYPE_NONE);
1465 info->d.proxy.klass = klass;
1466 res = mono_mb_create_and_cache_full (cache, klass,
1467 mb, sig, sig->param_count + 16, info, NULL);
1474 * mono_marshal_get_ldflda_wrapper:
1475 * @type: the type of the field
1477 * This method generates a function which can be used to load a field address
1478 * from an object. The generated function has the following signature:
1479 * gpointer ldflda_wrapper (MonoObject *this, MonoClass *class, MonoClassField *field, int offset);
1482 mono_marshal_get_ldflda_wrapper (MonoType *type)
1484 MonoMethodSignature *sig;
1485 MonoMethodBuilder *mb;
1491 int t, pos0, pos1, pos2, pos3;
1493 type = mono_type_get_underlying_type (type);
1497 if (type->type == MONO_TYPE_SZARRAY) {
1498 klass = mono_defaults.array_class;
1499 } else if (type->type == MONO_TYPE_VALUETYPE) {
1500 klass = type->data.klass;
1501 } else if (t == MONO_TYPE_OBJECT || t == MONO_TYPE_CLASS || t == MONO_TYPE_STRING ||
1502 t == MONO_TYPE_CLASS) {
1503 klass = mono_defaults.object_class;
1504 } else if (t == MONO_TYPE_PTR || t == MONO_TYPE_FNPTR) {
1505 klass = mono_defaults.int_class;
1506 } else if (t == MONO_TYPE_GENERICINST) {
1507 if (mono_type_generic_inst_is_valuetype (type))
1508 klass = mono_class_from_mono_type (type);
1510 klass = mono_defaults.object_class;
1512 klass = mono_class_from_mono_type (type);
1515 klass = mono_defaults.int_class;
1518 cache = get_cache (&klass->image->ldflda_wrapper_cache, mono_aligned_addr_hash, NULL);
1519 if ((res = mono_marshal_find_in_cache (cache, klass)))
1522 /* we add the %p pointer value of klass because class names are not unique */
1523 name = g_strdup_printf ("__ldflda_wrapper_%p_%s.%s", klass, klass->name_space, klass->name);
1524 mb = mono_mb_new (mono_defaults.object_class, name, MONO_WRAPPER_LDFLDA);
1527 sig = mono_metadata_signature_alloc (mono_defaults.corlib, 4);
1528 sig->params [0] = &mono_defaults.object_class->byval_arg;
1529 sig->params [1] = &mono_defaults.int_class->byval_arg;
1530 sig->params [2] = &mono_defaults.int_class->byval_arg;
1531 sig->params [3] = &mono_defaults.int_class->byval_arg;
1532 sig->ret = &mono_defaults.int_class->byval_arg;
1535 /* if typeof (this) != transparent_proxy goto pos0 */
1536 mono_mb_emit_ldarg (mb, 0);
1537 pos0 = mono_mb_emit_proxy_check (mb, CEE_BNE_UN);
1539 /* if same_appdomain goto pos1 */
1540 mono_mb_emit_ldarg (mb, 0);
1541 pos1 = mono_mb_emit_xdomain_check (mb, CEE_BEQ);
1543 mono_mb_emit_exception_full (mb, "System", "InvalidOperationException", "Attempt to load field address from object in another appdomain.");
1545 /* same app domain */
1546 mono_mb_patch_branch (mb, pos1);
1548 /* if typeof (this) != contextbound goto pos2 */
1549 mono_mb_emit_ldarg (mb, 0);
1550 pos2 = mono_mb_emit_contextbound_check (mb, CEE_BEQ);
1552 /* if this->rp->context == mono_context_get goto pos3 */
1553 mono_mb_emit_ldarg (mb, 0);
1554 mono_mb_emit_ldflda (mb, MONO_STRUCT_OFFSET (MonoTransparentProxy, rp));
1555 mono_mb_emit_byte (mb, CEE_LDIND_REF);
1556 mono_mb_emit_ldflda (mb, MONO_STRUCT_OFFSET (MonoRealProxy, context));
1557 mono_mb_emit_byte (mb, CEE_LDIND_REF);
1558 mono_mb_emit_icall (mb, mono_context_get);
1559 pos3 = mono_mb_emit_branch (mb, CEE_BEQ);
1561 mono_mb_emit_exception_full (mb, "System", "InvalidOperationException", "Attempt to load field address from object in another context.");
1563 mono_mb_patch_branch (mb, pos2);
1564 mono_mb_patch_branch (mb, pos3);
1566 /* return the address of the field from this->rp->unwrapped_server */
1567 mono_mb_emit_ldarg (mb, 0);
1568 mono_mb_emit_ldflda (mb, MONO_STRUCT_OFFSET (MonoTransparentProxy, rp));
1569 mono_mb_emit_byte (mb, CEE_LDIND_REF);
1570 mono_mb_emit_ldflda (mb, MONO_STRUCT_OFFSET (MonoRealProxy, unwrapped_server));
1571 mono_mb_emit_byte (mb, CEE_LDIND_REF);
1572 mono_mb_emit_byte (mb, MONO_CUSTOM_PREFIX);
1573 mono_mb_emit_byte (mb, CEE_MONO_OBJADDR);
1574 mono_mb_emit_ldarg (mb, 3);
1575 mono_mb_emit_byte (mb, CEE_ADD);
1576 mono_mb_emit_byte (mb, CEE_RET);
1578 /* not a proxy: return the address of the field directly */
1579 mono_mb_patch_branch (mb, pos0);
1581 mono_mb_emit_ldarg (mb, 0);
1582 mono_mb_emit_byte (mb, MONO_CUSTOM_PREFIX);
1583 mono_mb_emit_byte (mb, CEE_MONO_OBJADDR);
1584 mono_mb_emit_ldarg (mb, 3);
1585 mono_mb_emit_byte (mb, CEE_ADD);
1587 mono_mb_emit_byte (mb, CEE_RET);
1590 info = mono_wrapper_info_create (mb, WRAPPER_SUBTYPE_NONE);
1591 info->d.proxy.klass = klass;
1592 res = mono_mb_create_and_cache_full (cache, klass,
1593 mb, sig, sig->param_count + 16,
1601 * mono_marshal_get_stfld_remote_wrapper:
1602 * klass: The type of the field
1604 * This function generates a wrapper for calling mono_store_remote_field_new
1605 * with the appropriate signature.
1606 * Similarly to mono_marshal_get_ldfld_remote_wrapper () this doesn't depend on the
1607 * klass argument anymore.
1610 mono_marshal_get_stfld_remote_wrapper (MonoClass *klass)
1612 MonoMethodSignature *sig, *csig;
1613 MonoMethodBuilder *mb;
1615 static MonoMethod *cached = NULL;
1617 mono_marshal_lock_internal ();
1619 mono_marshal_unlock_internal ();
1622 mono_marshal_unlock_internal ();
1624 mb = mono_mb_new_no_dup_name (mono_defaults.object_class, "__mono_store_remote_field_new_wrapper", MONO_WRAPPER_STFLD_REMOTE);
1626 mb->method->save_lmf = 1;
1628 sig = mono_metadata_signature_alloc (mono_defaults.corlib, 4);
1629 sig->params [0] = &mono_defaults.object_class->byval_arg;
1630 sig->params [1] = &mono_defaults.int_class->byval_arg;
1631 sig->params [2] = &mono_defaults.int_class->byval_arg;
1632 sig->params [3] = &mono_defaults.object_class->byval_arg;
1633 sig->ret = &mono_defaults.void_class->byval_arg;
1636 mono_mb_emit_ldarg (mb, 0);
1637 mono_mb_emit_ldarg (mb, 1);
1638 mono_mb_emit_ldarg (mb, 2);
1639 mono_mb_emit_ldarg (mb, 3);
1641 csig = mono_metadata_signature_alloc (mono_defaults.corlib, 4);
1642 csig->params [0] = &mono_defaults.object_class->byval_arg;
1643 csig->params [1] = &mono_defaults.int_class->byval_arg;
1644 csig->params [2] = &mono_defaults.int_class->byval_arg;
1645 csig->params [3] = &mono_defaults.object_class->byval_arg;
1646 csig->ret = &mono_defaults.void_class->byval_arg;
1649 mono_mb_emit_native_call (mb, csig, mono_store_remote_field_new);
1650 mono_marshal_emit_thread_interrupt_checkpoint (mb);
1652 mono_mb_emit_byte (mb, CEE_RET);
1655 mono_marshal_lock_internal ();
1657 mono_marshal_unlock_internal ();
1660 newm = mono_mb_create (mb, sig, 6, NULL);
1661 mono_marshal_lock_internal ();
1666 mono_marshal_unlock_internal ();
1668 mono_marshal_unlock_internal ();
1669 mono_free_method (newm);
1678 * mono_marshal_get_stfld_wrapper:
1679 * @type: the type of the field
1681 * This method generates a function which can be use to store a field with type
1682 * @type. The generated function has the following signature:
1683 * void stfld_wrapper (MonoObject *this, MonoClass *class, MonoClassField *field, int offset, <@type> val)
1686 mono_marshal_get_stfld_wrapper (MonoType *type)
1688 MonoMethodSignature *sig;
1689 MonoMethodBuilder *mb;
1697 type = mono_type_get_underlying_type (type);
1701 if (type->type == MONO_TYPE_SZARRAY) {
1702 klass = mono_defaults.array_class;
1703 } else if (type->type == MONO_TYPE_VALUETYPE) {
1704 klass = type->data.klass;
1705 } else if (t == MONO_TYPE_OBJECT || t == MONO_TYPE_CLASS || t == MONO_TYPE_STRING) {
1706 klass = mono_defaults.object_class;
1707 } else if (t == MONO_TYPE_PTR || t == MONO_TYPE_FNPTR) {
1708 klass = mono_defaults.int_class;
1709 } else if (t == MONO_TYPE_GENERICINST) {
1710 if (mono_type_generic_inst_is_valuetype (type))
1711 klass = mono_class_from_mono_type (type);
1713 klass = mono_defaults.object_class;
1715 klass = mono_class_from_mono_type (type);
1718 klass = mono_defaults.int_class;
1721 cache = get_cache (&klass->image->stfld_wrapper_cache, mono_aligned_addr_hash, NULL);
1722 if ((res = mono_marshal_find_in_cache (cache, klass)))
1725 /* we add the %p pointer value of klass because class names are not unique */
1726 name = g_strdup_printf ("__stfld_wrapper_%p_%s.%s", klass, klass->name_space, klass->name);
1727 mb = mono_mb_new (mono_defaults.object_class, name, MONO_WRAPPER_STFLD);
1730 sig = mono_metadata_signature_alloc (mono_defaults.corlib, 5);
1731 sig->params [0] = &mono_defaults.object_class->byval_arg;
1732 sig->params [1] = &mono_defaults.int_class->byval_arg;
1733 sig->params [2] = &mono_defaults.int_class->byval_arg;
1734 sig->params [3] = &mono_defaults.int_class->byval_arg;
1735 sig->params [4] = &klass->byval_arg;
1736 sig->ret = &mono_defaults.void_class->byval_arg;
1739 mono_mb_emit_ldarg (mb, 0);
1740 pos = mono_mb_emit_proxy_check (mb, CEE_BNE_UN);
1742 mono_mb_emit_ldarg (mb, 0);
1743 mono_mb_emit_ldarg (mb, 1);
1744 mono_mb_emit_ldarg (mb, 2);
1745 mono_mb_emit_ldarg (mb, 4);
1746 if (klass->valuetype)
1747 mono_mb_emit_op (mb, CEE_BOX, klass);
1749 mono_mb_emit_managed_call (mb, mono_marshal_get_stfld_remote_wrapper (klass), NULL);
1751 mono_mb_emit_byte (mb, CEE_RET);
1753 mono_mb_patch_branch (mb, pos);
1755 mono_mb_emit_ldarg (mb, 0);
1756 mono_mb_emit_byte (mb, MONO_CUSTOM_PREFIX);
1757 mono_mb_emit_byte (mb, CEE_MONO_OBJADDR);
1758 mono_mb_emit_ldarg (mb, 3);
1759 mono_mb_emit_byte (mb, CEE_ADD);
1760 mono_mb_emit_ldarg (mb, 4);
1765 case MONO_TYPE_BOOLEAN:
1766 case MONO_TYPE_CHAR:
1775 case MONO_TYPE_ARRAY:
1776 case MONO_TYPE_SZARRAY:
1777 case MONO_TYPE_OBJECT:
1778 case MONO_TYPE_CLASS:
1779 case MONO_TYPE_STRING:
1783 case MONO_TYPE_FNPTR:
1784 mono_mb_emit_byte (mb, mono_type_to_stind (type));
1786 case MONO_TYPE_VALUETYPE:
1787 g_assert (!klass->enumtype);
1788 mono_mb_emit_op (mb, CEE_STOBJ, klass);
1790 case MONO_TYPE_GENERICINST:
1792 case MONO_TYPE_MVAR:
1793 mono_mb_emit_op (mb, CEE_STOBJ, klass);
1796 g_warning ("type %x not implemented", type->type);
1797 g_assert_not_reached ();
1800 mono_mb_emit_byte (mb, CEE_RET);
1803 info = mono_wrapper_info_create (mb, WRAPPER_SUBTYPE_NONE);
1804 info->d.proxy.klass = klass;
1805 res = mono_mb_create_and_cache_full (cache, klass,
1806 mb, sig, sig->param_count + 16,
1814 mono_marshal_get_proxy_cancast (MonoClass *klass)
1816 static MonoMethodSignature *isint_sig = NULL;
1820 int pos_failed, pos_end;
1821 char *name, *klass_name;
1822 MonoMethod *can_cast_to;
1823 MonoMethodDesc *desc;
1824 MonoMethodBuilder *mb;
1826 cache = get_cache (&klass->image->proxy_isinst_cache, mono_aligned_addr_hash, NULL);
1827 if ((res = mono_marshal_find_in_cache (cache, klass)))
1831 isint_sig = mono_metadata_signature_alloc (mono_defaults.corlib, 1);
1832 isint_sig->params [0] = &mono_defaults.object_class->byval_arg;
1833 isint_sig->ret = &mono_defaults.object_class->byval_arg;
1834 isint_sig->pinvoke = 0;
1837 klass_name = mono_type_full_name (&klass->byval_arg);
1838 name = g_strdup_printf ("__proxy_isinst_wrapper_%s", klass_name);
1839 mb = mono_mb_new (mono_defaults.object_class, name, MONO_WRAPPER_PROXY_ISINST);
1840 g_free (klass_name);
1843 mb->method->save_lmf = 1;
1846 /* get the real proxy from the transparent proxy*/
1847 mono_mb_emit_ldarg (mb, 0);
1848 mono_mb_emit_ldflda (mb, MONO_STRUCT_OFFSET (MonoTransparentProxy, rp));
1849 mono_mb_emit_byte (mb, CEE_LDIND_REF);
1851 /* get the reflection type from the type handle */
1852 mono_mb_emit_ptr (mb, &klass->byval_arg);
1853 mono_mb_emit_icall (mb, type_from_handle);
1855 mono_mb_emit_ldarg (mb, 0);
1857 /* make the call to CanCastTo (type, ob) */
1858 desc = mono_method_desc_new ("IRemotingTypeInfo:CanCastTo", FALSE);
1859 can_cast_to = mono_method_desc_search_in_class (desc, mono_defaults.iremotingtypeinfo_class);
1860 g_assert (can_cast_to);
1861 mono_method_desc_free (desc);
1862 mono_mb_emit_op (mb, CEE_CALLVIRT, can_cast_to);
1864 pos_failed = mono_mb_emit_branch (mb, CEE_BRFALSE);
1866 /* Upgrade the proxy vtable by calling: mono_upgrade_remote_class_wrapper (type, ob)*/
1867 mono_mb_emit_ptr (mb, &klass->byval_arg);
1868 mono_mb_emit_icall (mb, type_from_handle);
1869 mono_mb_emit_ldarg (mb, 0);
1871 mono_mb_emit_icall (mb, mono_upgrade_remote_class_wrapper);
1872 mono_marshal_emit_thread_interrupt_checkpoint (mb);
1874 mono_mb_emit_ldarg (mb, 0);
1875 pos_end = mono_mb_emit_branch (mb, CEE_BR);
1879 mono_mb_patch_branch (mb, pos_failed);
1880 mono_mb_emit_byte (mb, CEE_LDNULL);
1884 mono_mb_patch_branch (mb, pos_end);
1885 mono_mb_emit_byte (mb, CEE_RET);
1888 info = mono_wrapper_info_create (mb, WRAPPER_SUBTYPE_NONE);
1889 info->d.proxy.klass = klass;
1890 res = mono_mb_create_and_cache_full (cache, klass, mb, isint_sig, isint_sig->param_count + 16, info, NULL);
1897 mono_upgrade_remote_class_wrapper (MonoReflectionType *rtype, MonoTransparentProxy *tproxy)
1900 MonoDomain *domain = ((MonoObject*)tproxy)->vtable->domain;
1901 klass = mono_class_from_mono_type (rtype->type);
1902 mono_upgrade_remote_class (domain, (MonoObject*)tproxy, klass);
1905 #else /* DISABLE_REMOTING */
1908 mono_remoting_init (void)
1912 #endif /* DISABLE_REMOTING */
1914 /* mono_get_xdomain_marshal_type()
1915 * Returns the kind of marshalling that a type needs for cross domain calls.
1917 static MonoXDomainMarshalType
1918 mono_get_xdomain_marshal_type (MonoType *t)
1921 case MONO_TYPE_VOID:
1922 g_assert_not_reached ();
1926 case MONO_TYPE_BOOLEAN:
1929 case MONO_TYPE_CHAR:
1936 return MONO_MARSHAL_NONE;
1937 case MONO_TYPE_STRING:
1938 return MONO_MARSHAL_COPY;
1939 case MONO_TYPE_ARRAY:
1940 case MONO_TYPE_SZARRAY: {
1941 MonoClass *elem_class = mono_class_from_mono_type (t)->element_class;
1942 if (mono_get_xdomain_marshal_type (&(elem_class->byval_arg)) != MONO_MARSHAL_SERIALIZE)
1943 return MONO_MARSHAL_COPY;
1949 return MONO_MARSHAL_SERIALIZE;
1952 /* mono_marshal_xdomain_copy_value
1953 * Makes a copy of "val" suitable for the current domain.
1956 mono_marshal_xdomain_copy_value (MonoObject *val)
1959 if (val == NULL) return NULL;
1961 domain = mono_domain_get ();
1963 switch (mono_object_class (val)->byval_arg.type) {
1964 case MONO_TYPE_VOID:
1965 g_assert_not_reached ();
1969 case MONO_TYPE_BOOLEAN:
1972 case MONO_TYPE_CHAR:
1978 case MONO_TYPE_R8: {
1979 return mono_value_box (domain, mono_object_class (val), ((char*)val) + sizeof(MonoObject));
1981 case MONO_TYPE_STRING: {
1982 MonoString *str = (MonoString *) val;
1983 return (MonoObject *) mono_string_new_utf16 (domain, mono_string_chars (str), mono_string_length (str));
1985 case MONO_TYPE_ARRAY:
1986 case MONO_TYPE_SZARRAY: {
1988 MonoXDomainMarshalType mt = mono_get_xdomain_marshal_type (&(mono_object_class (val)->element_class->byval_arg));
1989 if (mt == MONO_MARSHAL_SERIALIZE) return NULL;
1990 acopy = mono_array_clone_in_domain (domain, (MonoArray *) val);
1991 if (mt == MONO_MARSHAL_COPY) {
1992 int i, len = mono_array_length (acopy);
1993 for (i = 0; i < len; i++) {
1994 MonoObject *item = mono_array_get (acopy, gpointer, i);
1995 mono_array_setref (acopy, i, mono_marshal_xdomain_copy_value (item));
1998 return (MonoObject *) acopy;
2004 if (mono_object_class (val) == mono_defaults.stringbuilder_class) {
2005 MonoStringBuilder *oldsb = (MonoStringBuilder *) val;
2006 MonoStringBuilder *newsb = (MonoStringBuilder *) mono_object_new (domain, mono_defaults.stringbuilder_class);
2007 MONO_OBJECT_SETREF (newsb, str, mono_string_new_utf16 (domain, mono_string_chars (oldsb->str), mono_string_length (oldsb->str)));
2008 newsb->length = oldsb->length;
2009 newsb->max_capacity = (gint32)0x7fffffff;
2010 return (MonoObject *) newsb;