5 * Mono Project (http://www.mono-project.com)
7 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
8 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
9 * Copyright 2011 Rodrigo Kumpera
13 #include <mono/metadata/object-internals.h>
14 #include <mono/metadata/verify.h>
15 #include <mono/metadata/verify-internals.h>
16 #include <mono/metadata/opcodes.h>
17 #include <mono/metadata/tabledefs.h>
18 #include <mono/metadata/reflection.h>
19 #include <mono/metadata/debug-helpers.h>
20 #include <mono/metadata/mono-endian.h>
21 #include <mono/metadata/metadata.h>
22 #include <mono/metadata/metadata-internals.h>
23 #include <mono/metadata/class-internals.h>
24 #include <mono/metadata/security-manager.h>
25 #include <mono/metadata/security-core-clr.h>
26 #include <mono/metadata/tokentype.h>
27 #include <mono/metadata/mono-basic-block.h>
28 #include <mono/metadata/attrdefs.h>
29 #include <mono/utils/mono-counters.h>
30 #include <mono/utils/monobitset.h>
35 static MiniVerifierMode verifier_mode = MONO_VERIFIER_MODE_OFF;
36 static gboolean verify_all = FALSE;
39 * Set the desired level of checks for the verfier.
43 mono_verifier_set_mode (MiniVerifierMode mode)
49 mono_verifier_enable_verify_all ()
54 #ifndef DISABLE_VERIFIER
56 * Pull the list of opcodes
58 #define OPDEF(a,b,c,d,e,f,g,h,i,j) \
62 #include "mono/cil/opcode.def"
67 #ifdef MONO_VERIFIER_DEBUG
68 #define VERIFIER_DEBUG(code) do { code } while (0)
70 #define VERIFIER_DEBUG(code)
73 //////////////////////////////////////////////////////////////////
74 #define IS_STRICT_MODE(ctx) (((ctx)->level & MONO_VERIFY_NON_STRICT) == 0)
75 #define IS_FAIL_FAST_MODE(ctx) (((ctx)->level & MONO_VERIFY_FAIL_FAST) == MONO_VERIFY_FAIL_FAST)
76 #define IS_SKIP_VISIBILITY(ctx) (((ctx)->level & MONO_VERIFY_SKIP_VISIBILITY) == MONO_VERIFY_SKIP_VISIBILITY)
77 #define IS_REPORT_ALL_ERRORS(ctx) (((ctx)->level & MONO_VERIFY_REPORT_ALL_ERRORS) == MONO_VERIFY_REPORT_ALL_ERRORS)
78 #define CLEAR_PREFIX(ctx, prefix) do { (ctx)->prefix_set &= ~(prefix); } while (0)
79 #define ADD_VERIFY_INFO(__ctx, __msg, __status, __exception) \
81 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
82 vinfo->info.status = __status; \
83 vinfo->info.message = ( __msg ); \
84 vinfo->exception_type = (__exception); \
85 (__ctx)->list = g_slist_prepend ((__ctx)->list, vinfo); \
88 //TODO support MONO_VERIFY_REPORT_ALL_ERRORS
89 #define ADD_VERIFY_ERROR(__ctx, __msg) \
91 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_ERROR, MONO_EXCEPTION_INVALID_PROGRAM); \
95 #define CODE_NOT_VERIFIABLE(__ctx, __msg) \
97 if ((__ctx)->verifiable || IS_REPORT_ALL_ERRORS (__ctx)) { \
98 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_NOT_VERIFIABLE, MONO_EXCEPTION_UNVERIFIABLE_IL); \
99 (__ctx)->verifiable = 0; \
100 if (IS_FAIL_FAST_MODE (__ctx)) \
101 (__ctx)->valid = 0; \
105 #define ADD_VERIFY_ERROR2(__ctx, __msg, __exception) \
107 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_ERROR, __exception); \
108 (__ctx)->valid = 0; \
111 #define CODE_NOT_VERIFIABLE2(__ctx, __msg, __exception) \
113 if ((__ctx)->verifiable || IS_REPORT_ALL_ERRORS (__ctx)) { \
114 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_NOT_VERIFIABLE, __exception); \
115 (__ctx)->verifiable = 0; \
116 if (IS_FAIL_FAST_MODE (__ctx)) \
117 (__ctx)->valid = 0; \
121 #define CHECK_ADD4_OVERFLOW_UN(a, b) ((guint32)(0xFFFFFFFFU) - (guint32)(b) < (guint32)(a))
122 #define CHECK_ADD8_OVERFLOW_UN(a, b) ((guint64)(0xFFFFFFFFFFFFFFFFUL) - (guint64)(b) < (guint64)(a))
124 #if SIZEOF_VOID_P == 4
125 #define CHECK_ADDP_OVERFLOW_UN(a,b) CHECK_ADD4_OVERFLOW_UN(a, b)
127 #define CHECK_ADDP_OVERFLOW_UN(a,b) CHECK_ADD8_OVERFLOW_UN(a, b)
130 #define ADDP_IS_GREATER_OR_OVF(a, b, c) (((a) + (b) > (c)) || CHECK_ADDP_OVERFLOW_UN (a, b))
131 #define ADD_IS_GREATER_OR_OVF(a, b, c) (((a) + (b) > (c)) || CHECK_ADD4_OVERFLOW_UN (a, b))
133 /*Flags to be used with ILCodeDesc::flags */
135 /*Instruction has not been processed.*/
136 IL_CODE_FLAG_NOT_PROCESSED = 0,
137 /*Instruction was decoded by mono_method_verify loop.*/
138 IL_CODE_FLAG_SEEN = 1,
139 /*Instruction was target of a branch or is at a protected block boundary.*/
140 IL_CODE_FLAG_WAS_TARGET = 2,
141 /*Used by stack_init to avoid double initialize each entry.*/
142 IL_CODE_FLAG_STACK_INITED = 4,
143 /*Used by merge_stacks to decide if it should just copy the eval stack.*/
144 IL_CODE_STACK_MERGED = 8,
145 /*This instruction is part of the delegate construction sequence, it cannot be target of a branch.*/
146 IL_CODE_DELEGATE_SEQUENCE = 0x10,
147 /*This is a delegate created from a ldftn to a non final virtual method*/
148 IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL = 0x20,
149 /*This is a call to a non final virtual method*/
150 IL_CODE_CALL_NONFINAL_VIRTUAL = 0x40,
168 guint16 size, max_size;
185 /*Allocated fnptr MonoType that should be freed by us.*/
187 /*Type dup'ed exception types from catch blocks.*/
188 GSList *exception_types;
193 /*TODO get rid of target here, need_merge in mono_method_verify and hoist the merging code in the branching code*/
197 MonoMethodSignature *signature;
198 MonoMethodHeader *header;
200 MonoGenericContext *generic_context;
204 /*This flag helps solving a corner case of delegate verification in that you cannot have a "starg 0"
205 *on a method that creates a delegate for a non-final virtual method using ldftn*/
206 gboolean has_this_store;
208 /*This flag is used to control if the contructor of the parent class has been called.
209 *If the this pointer is pushed on the eval stack and it's a reference type constructor and
210 * super_ctor_called is false, the uninitialized flag is set on the pushed value.
212 * Poping an uninitialized this ptr from the eval stack is an unverifiable operation unless
213 * the safe variant is used. Only a few opcodes can use it : dup, pop, ldfld, stfld and call to a constructor.
215 gboolean super_ctor_called;
219 MonoType *constrained_type;
223 merge_stacks (VerifyContext *ctx, ILCodeDesc *from, ILCodeDesc *to, gboolean start, gboolean external);
226 get_stack_type (MonoType *type);
229 mono_delegate_signature_equal (MonoMethodSignature *delegate_sig, MonoMethodSignature *method_sig, gboolean is_static_ldftn);
232 mono_class_is_valid_generic_instantiation (VerifyContext *ctx, MonoClass *klass);
235 mono_method_is_valid_generic_instantiation (VerifyContext *ctx, MonoMethod *method);
237 static MonoGenericParam*
238 verifier_get_generic_param_from_type (VerifyContext *ctx, MonoType *type);
241 verifier_class_is_assignable_from (MonoClass *target, MonoClass *candidate);
242 //////////////////////////////////////////////////////////////////
247 TYPE_INV = 0, /* leave at 0. */
252 /* Used by operator tables to resolve pointer types (managed & unmanaged) and by unmanaged pointer types*/
254 /* value types and classes */
256 /* Number of types, used to define the size of the tables*/
259 /* Used by tables to signal that a result is not verifiable*/
260 NON_VERIFIABLE_RESULT = 0x80,
262 /*Mask used to extract just the type, excluding flags */
265 /* The stack type is a managed pointer, unmask the value to res */
266 POINTER_MASK = 0x100,
268 /*Stack type with the pointer mask*/
269 RAW_TYPE_MASK = 0x10F,
271 /* Controlled Mutability Manager Pointer */
274 /* The stack type is a null literal*/
275 NULL_LITERAL_MASK = 0x400,
277 /**Used by ldarg.0 and family to let delegate verification happens.*/
278 THIS_POINTER_MASK = 0x800,
280 /**Signals that this is a boxed value type*/
283 /*This is an unitialized this ref*/
284 UNINIT_THIS_MASK = 0x2000,
287 static const char* const
288 type_names [TYPE_MAX + 1] = {
299 PREFIX_UNALIGNED = 1,
302 PREFIX_CONSTRAINED = 8,
305 //////////////////////////////////////////////////////////////////
307 #ifdef ENABLE_VERIFIER_STATS
309 #define _MEM_ALLOC(amt) do { allocated_memory += (amt); working_set += (amt); } while (0)
310 #define _MEM_FREE(amt) do { working_set -= (amt); } while (0)
312 static int allocated_memory;
313 static int working_set;
314 static int max_allocated_memory;
315 static int max_working_set;
316 static int total_allocated_memory;
319 finish_collect_stats (void)
321 max_allocated_memory = MAX (max_allocated_memory, allocated_memory);
322 max_working_set = MAX (max_working_set, working_set);
323 total_allocated_memory += allocated_memory;
324 allocated_memory = working_set = 0;
328 init_verifier_stats (void)
330 static gboolean inited;
333 mono_counters_register ("Maximum memory allocated during verification", MONO_COUNTER_METADATA | MONO_COUNTER_INT, &max_allocated_memory);
334 mono_counters_register ("Maximum memory used during verification", MONO_COUNTER_METADATA | MONO_COUNTER_INT, &max_working_set);
335 mono_counters_register ("Total memory allocated for verification", MONO_COUNTER_METADATA | MONO_COUNTER_INT, &total_allocated_memory);
341 #define _MEM_ALLOC(amt) do {} while (0)
342 #define _MEM_FREE(amt) do { } while (0)
344 #define finish_collect_stats()
345 #define init_verifier_stats()
350 //////////////////////////////////////////////////////////////////
353 /*Token validation macros and functions */
354 #define IS_MEMBER_REF(token) (mono_metadata_token_table (token) == MONO_TABLE_MEMBERREF)
355 #define IS_METHOD_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
356 #define IS_METHOD_SPEC(token) (mono_metadata_token_table (token) == MONO_TABLE_METHODSPEC)
357 #define IS_FIELD_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_FIELD)
359 #define IS_TYPE_REF(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPEREF)
360 #define IS_TYPE_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPEDEF)
361 #define IS_TYPE_SPEC(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPESPEC)
362 #define IS_METHOD_DEF_OR_REF_OR_SPEC(token) (IS_METHOD_DEF (token) || IS_MEMBER_REF (token) || IS_METHOD_SPEC (token))
363 #define IS_TYPE_DEF_OR_REF_OR_SPEC(token) (IS_TYPE_DEF (token) || IS_TYPE_REF (token) || IS_TYPE_SPEC (token))
364 #define IS_FIELD_DEF_OR_REF(token) (IS_FIELD_DEF (token) || IS_MEMBER_REF (token))
367 * Verify if @token refers to a valid row on int's table.
370 token_bounds_check (MonoImage *image, guint32 token)
372 if (image_is_dynamic (image))
373 return mono_reflection_is_valid_dynamic_token ((MonoDynamicImage*)image, token);
374 return image->tables [mono_metadata_token_table (token)].rows >= mono_metadata_token_index (token) && mono_metadata_token_index (token) > 0;
378 mono_type_create_fnptr_from_mono_method (VerifyContext *ctx, MonoMethod *method)
380 MonoType *res = g_new0 (MonoType, 1);
381 _MEM_ALLOC (sizeof (MonoType));
383 //FIXME use mono_method_get_signature_full
384 res->data.method = mono_method_signature (method);
385 res->type = MONO_TYPE_FNPTR;
386 ctx->funptrs = g_slist_prepend (ctx->funptrs, res);
391 * mono_type_is_enum_type:
393 * Returns TRUE if @type is an enum type.
396 mono_type_is_enum_type (MonoType *type)
398 if (type->type == MONO_TYPE_VALUETYPE && type->data.klass->enumtype)
400 if (type->type == MONO_TYPE_GENERICINST && type->data.generic_class->container_class->enumtype)
406 * mono_type_is_value_type:
408 * Returns TRUE if @type is named after @namespace.@name.
412 mono_type_is_value_type (MonoType *type, const char *namespace, const char *name)
414 return type->type == MONO_TYPE_VALUETYPE &&
415 !strcmp (namespace, type->data.klass->name_space) &&
416 !strcmp (name, type->data.klass->name);
420 * Returns TURE if @type is VAR or MVAR
423 mono_type_is_generic_argument (MonoType *type)
425 return type->type == MONO_TYPE_VAR || type->type == MONO_TYPE_MVAR;
429 * mono_type_get_underlying_type_any:
431 * This functions is just like mono_type_get_underlying_type but it doesn't care if the type is byref.
433 * Returns the underlying type of @type regardless if it is byref or not.
436 mono_type_get_underlying_type_any (MonoType *type)
438 if (type->type == MONO_TYPE_VALUETYPE && type->data.klass->enumtype)
439 return mono_class_enum_basetype (type->data.klass);
440 if (type->type == MONO_TYPE_GENERICINST && type->data.generic_class->container_class->enumtype)
441 return mono_class_enum_basetype (type->data.generic_class->container_class);
445 static G_GNUC_UNUSED const char*
446 mono_type_get_stack_name (MonoType *type)
448 return type_names [get_stack_type (type) & TYPE_MASK];
451 #define CTOR_REQUIRED_FLAGS (METHOD_ATTRIBUTE_SPECIAL_NAME | METHOD_ATTRIBUTE_RT_SPECIAL_NAME)
452 #define CTOR_INVALID_FLAGS (METHOD_ATTRIBUTE_STATIC)
455 mono_method_is_constructor (MonoMethod *method)
457 return ((method->flags & CTOR_REQUIRED_FLAGS) == CTOR_REQUIRED_FLAGS &&
458 !(method->flags & CTOR_INVALID_FLAGS) &&
459 !strcmp (".ctor", method->name));
463 mono_class_has_default_constructor (MonoClass *klass)
468 mono_class_setup_methods (klass);
469 if (klass->exception_type)
472 for (i = 0; i < klass->method.count; ++i) {
473 method = klass->methods [i];
474 if (mono_method_is_constructor (method) &&
475 mono_method_signature (method) &&
476 mono_method_signature (method)->param_count == 0 &&
477 (method->flags & METHOD_ATTRIBUTE_MEMBER_ACCESS_MASK) == METHOD_ATTRIBUTE_PUBLIC)
484 * Verify if @type is valid for the given @ctx verification context.
485 * this function checks for VAR and MVAR types that are invalid under the current verifier,
488 mono_type_is_valid_type_in_context_full (MonoType *type, MonoGenericContext *context, gboolean check_gtd)
491 MonoGenericInst *inst;
493 switch (type->type) {
498 inst = type->type == MONO_TYPE_VAR ? context->class_inst : context->method_inst;
499 if (!inst || mono_type_get_generic_param_num (type) >= inst->type_argc)
502 case MONO_TYPE_SZARRAY:
503 return mono_type_is_valid_type_in_context_full (&type->data.klass->byval_arg, context, check_gtd);
504 case MONO_TYPE_ARRAY:
505 return mono_type_is_valid_type_in_context_full (&type->data.array->eklass->byval_arg, context, check_gtd);
507 return mono_type_is_valid_type_in_context_full (type->data.type, context, check_gtd);
508 case MONO_TYPE_GENERICINST:
509 inst = type->data.generic_class->context.class_inst;
512 for (i = 0; i < inst->type_argc; ++i)
513 if (!mono_type_is_valid_type_in_context_full (inst->type_argv [i], context, check_gtd))
516 case MONO_TYPE_CLASS:
517 case MONO_TYPE_VALUETYPE: {
518 MonoClass *klass = type->data.klass;
520 * It's possible to encode generic'sh types in such a way that they disguise themselves as class or valuetype.
521 * Fixing the type decoding is really tricky since under some cases this behavior is needed, for example, to
522 * have a 'class' type pointing to a 'genericinst' class.
524 * For the runtime these non canonical (weird) encodings work fine, the worst they can cause is some
525 * reflection oddities which are harmless - to security at least.
527 if (klass->byval_arg.type != type->type)
528 return mono_type_is_valid_type_in_context_full (&klass->byval_arg, context, check_gtd);
530 if (check_gtd && klass->generic_container)
539 mono_type_is_valid_type_in_context (MonoType *type, MonoGenericContext *context)
541 return mono_type_is_valid_type_in_context_full (type, context, FALSE);
544 /*This function returns NULL if the type is not instantiatable*/
546 verifier_inflate_type (VerifyContext *ctx, MonoType *type, MonoGenericContext *context)
551 result = mono_class_inflate_generic_type_checked (type, context, &error);
552 if (!mono_error_ok (&error)) {
553 mono_error_cleanup (&error);
559 /*A side note here. We don't need to check if arguments are broken since this
560 is only need to be done by the runtime before realizing the type.
563 is_valid_generic_instantiation (MonoGenericContainer *gc, MonoGenericContext *context, MonoGenericInst *ginst)
568 if (ginst->type_argc != gc->type_argc)
571 for (i = 0; i < gc->type_argc; ++i) {
572 MonoGenericParamInfo *param_info = mono_generic_container_get_param_info (gc, i);
573 MonoClass *paramClass;
574 MonoClass **constraints;
575 MonoType *param_type = ginst->type_argv [i];
577 /*it's not our job to validate type variables*/
578 if (mono_type_is_generic_argument (param_type))
581 paramClass = mono_class_from_mono_type (param_type);
584 /* A GTD can't be a generic argument.
586 * Due to how types are encoded we must check for the case of a genericinst MonoType and GTD MonoClass.
587 * This happens in cases such as: class Foo<T> { void X() { new Bar<T> (); } }
589 * Open instantiations can have GTDs as this happens when one type is instantiated with others params
590 * and the former has an expansion into the later. For example:
592 * class A<T>: B<K> {}
593 * The type A <K> has a parent B<K>, that is inflated into the GTD B<>.
594 * Since A<K> is open, thus not instantiatable, this is valid.
596 if (paramClass->generic_container && param_type->type != MONO_TYPE_GENERICINST && !ginst->is_open)
599 /*it's not safe to call mono_class_init from here*/
600 if (paramClass->generic_class && !paramClass->inited) {
601 if (!mono_class_is_valid_generic_instantiation (NULL, paramClass))
605 if (!param_info->constraints && !(param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK))
608 if ((param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT) && (!paramClass->valuetype || mono_class_is_nullable (paramClass)))
611 if ((param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_REFERENCE_TYPE_CONSTRAINT) && paramClass->valuetype)
614 if ((param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_CONSTRUCTOR_CONSTRAINT) && !paramClass->valuetype && !mono_class_has_default_constructor (paramClass))
617 if (!param_info->constraints)
620 for (constraints = param_info->constraints; *constraints; ++constraints) {
621 MonoClass *ctr = *constraints;
624 inflated = mono_class_inflate_generic_type_checked (&ctr->byval_arg, context, &error);
625 if (!mono_error_ok (&error)) {
626 mono_error_cleanup (&error);
629 ctr = mono_class_from_mono_type (inflated);
630 mono_metadata_free_type (inflated);
632 /*FIXME maybe we need the same this as verifier_class_is_assignable_from*/
633 if (!mono_class_is_assignable_from_slow (ctr, paramClass))
641 * Return true if @candidate is constraint compatible with @target.
643 * This means that @candidate constraints are a super set of @target constaints
646 mono_generic_param_is_constraint_compatible (VerifyContext *ctx, MonoGenericParam *target, MonoGenericParam *candidate, MonoClass *candidate_param_class, MonoGenericContext *context)
648 MonoGenericParamInfo *tinfo = mono_generic_param_info (target);
649 MonoGenericParamInfo *cinfo = mono_generic_param_info (candidate);
650 MonoClass **candidate_class;
651 gboolean class_constraint_satisfied = FALSE;
652 gboolean valuetype_constraint_satisfied = FALSE;
654 int tmask = tinfo->flags & GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK;
655 int cmask = cinfo->flags & GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK;
657 if (cinfo->constraints) {
658 for (candidate_class = cinfo->constraints; *candidate_class; ++candidate_class) {
660 MonoType *inflated = verifier_inflate_type (ctx, &(*candidate_class)->byval_arg, ctx->generic_context);
663 cc = mono_class_from_mono_type (inflated);
664 mono_metadata_free_type (inflated);
666 if (mono_type_is_reference (&cc->byval_arg) && !MONO_CLASS_IS_INTERFACE (cc))
667 class_constraint_satisfied = TRUE;
668 else if (!mono_type_is_reference (&cc->byval_arg) && !MONO_CLASS_IS_INTERFACE (cc))
669 valuetype_constraint_satisfied = TRUE;
672 class_constraint_satisfied |= (cmask & GENERIC_PARAMETER_ATTRIBUTE_REFERENCE_TYPE_CONSTRAINT) != 0;
673 valuetype_constraint_satisfied |= (cmask & GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT) != 0;
675 if ((tmask & GENERIC_PARAMETER_ATTRIBUTE_REFERENCE_TYPE_CONSTRAINT) && !class_constraint_satisfied)
677 if ((tmask & GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT) && !valuetype_constraint_satisfied)
679 if ((tmask & GENERIC_PARAMETER_ATTRIBUTE_CONSTRUCTOR_CONSTRAINT) && !((cmask & GENERIC_PARAMETER_ATTRIBUTE_CONSTRUCTOR_CONSTRAINT) ||
680 valuetype_constraint_satisfied)) {
685 if (tinfo->constraints) {
686 MonoClass **target_class;
687 for (target_class = tinfo->constraints; *target_class; ++target_class) {
689 MonoType *inflated = verifier_inflate_type (ctx, &(*target_class)->byval_arg, context);
692 tc = mono_class_from_mono_type (inflated);
693 mono_metadata_free_type (inflated);
696 * A constraint from @target might inflate into @candidate itself and in that case we don't need
697 * check it's constraints since it satisfy the constraint by itself.
699 if (mono_metadata_type_equal (&tc->byval_arg, &candidate_param_class->byval_arg))
702 if (!cinfo->constraints)
705 for (candidate_class = cinfo->constraints; *candidate_class; ++candidate_class) {
707 inflated = verifier_inflate_type (ctx, &(*candidate_class)->byval_arg, ctx->generic_context);
710 cc = mono_class_from_mono_type (inflated);
711 mono_metadata_free_type (inflated);
713 if (verifier_class_is_assignable_from (tc, cc))
717 * This happens when we have the following:
719 * Bar<K> where K : IFace
720 * Foo<T, U> where T : U where U : IFace
722 * Bar<T> <- T here satisfy K constraint transitively through to U's constraint
725 if (mono_type_is_generic_argument (&cc->byval_arg)) {
726 MonoGenericParam *other_candidate = verifier_get_generic_param_from_type (ctx, &cc->byval_arg);
728 if (mono_generic_param_is_constraint_compatible (ctx, target, other_candidate, cc, context)) {
733 if (!*candidate_class)
740 static MonoGenericParam*
741 verifier_get_generic_param_from_type (VerifyContext *ctx, MonoType *type)
743 MonoGenericContainer *gc;
744 MonoMethod *method = ctx->method;
747 num = mono_type_get_generic_param_num (type);
749 if (type->type == MONO_TYPE_VAR) {
750 MonoClass *gtd = method->klass;
751 if (gtd->generic_class)
752 gtd = gtd->generic_class->container_class;
753 gc = gtd->generic_container;
755 MonoMethod *gmd = method;
756 if (method->is_inflated)
757 gmd = ((MonoMethodInflated*)method)->declaring;
758 gc = mono_method_get_generic_container (gmd);
762 return mono_generic_container_get_param (gc, num);
768 * Verify if @type is valid for the given @ctx verification context.
769 * this function checks for VAR and MVAR types that are invalid under the current verifier,
770 * This means that it either
773 is_valid_type_in_context (VerifyContext *ctx, MonoType *type)
775 return mono_type_is_valid_type_in_context (type, ctx->generic_context);
779 is_valid_generic_instantiation_in_context (VerifyContext *ctx, MonoGenericInst *ginst, gboolean check_gtd)
782 for (i = 0; i < ginst->type_argc; ++i) {
783 MonoType *type = ginst->type_argv [i];
785 if (!mono_type_is_valid_type_in_context_full (type, ctx->generic_context, TRUE))
792 generic_arguments_respect_constraints (VerifyContext *ctx, MonoGenericContainer *gc, MonoGenericContext *context, MonoGenericInst *ginst)
795 for (i = 0; i < ginst->type_argc; ++i) {
796 MonoType *type = ginst->type_argv [i];
797 MonoGenericParam *target = mono_generic_container_get_param (gc, i);
798 MonoGenericParam *candidate;
799 MonoClass *candidate_class;
801 if (!mono_type_is_generic_argument (type))
804 if (!is_valid_type_in_context (ctx, type))
807 candidate = verifier_get_generic_param_from_type (ctx, type);
808 candidate_class = mono_class_from_mono_type (type);
810 if (!mono_generic_param_is_constraint_compatible (ctx, target, candidate, candidate_class, context))
817 mono_method_repect_method_constraints (VerifyContext *ctx, MonoMethod *method)
819 MonoMethodInflated *gmethod = (MonoMethodInflated *)method;
820 MonoGenericInst *ginst = gmethod->context.method_inst;
821 MonoGenericContainer *gc = mono_method_get_generic_container (gmethod->declaring);
822 return !gc || generic_arguments_respect_constraints (ctx, gc, &gmethod->context, ginst);
826 mono_class_repect_method_constraints (VerifyContext *ctx, MonoClass *klass)
828 MonoGenericClass *gklass = klass->generic_class;
829 MonoGenericInst *ginst = gklass->context.class_inst;
830 MonoGenericContainer *gc = gklass->container_class->generic_container;
831 return !gc || generic_arguments_respect_constraints (ctx, gc, &gklass->context, ginst);
835 mono_method_is_valid_generic_instantiation (VerifyContext *ctx, MonoMethod *method)
837 MonoMethodInflated *gmethod = (MonoMethodInflated *)method;
838 MonoGenericInst *ginst = gmethod->context.method_inst;
839 MonoGenericContainer *gc = mono_method_get_generic_container (gmethod->declaring);
840 if (!gc) /*non-generic inflated method - it's part of a generic type */
842 if (ctx && !is_valid_generic_instantiation_in_context (ctx, ginst, TRUE))
844 return is_valid_generic_instantiation (gc, &gmethod->context, ginst);
849 mono_class_is_valid_generic_instantiation (VerifyContext *ctx, MonoClass *klass)
851 MonoGenericClass *gklass = klass->generic_class;
852 MonoGenericInst *ginst = gklass->context.class_inst;
853 MonoGenericContainer *gc = gklass->container_class->generic_container;
854 if (ctx && !is_valid_generic_instantiation_in_context (ctx, ginst, TRUE))
856 return is_valid_generic_instantiation (gc, &gklass->context, ginst);
860 mono_type_is_valid_in_context (VerifyContext *ctx, MonoType *type)
865 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid null type at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
869 if (!is_valid_type_in_context (ctx, type)) {
870 char *str = mono_type_full_name (type);
871 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid generic type (%s%s) (argument out of range or %s is not generic) at 0x%04x",
872 str [0] == '!' ? "" : type->type == MONO_TYPE_VAR ? "!" : "!!",
874 type->type == MONO_TYPE_VAR ? "class" : "method",
876 MONO_EXCEPTION_BAD_IMAGE);
881 klass = mono_class_from_mono_type (type);
882 mono_class_init (klass);
883 if (mono_loader_get_last_error () || klass->exception_type != MONO_EXCEPTION_NONE) {
884 if (klass->generic_class && !mono_class_is_valid_generic_instantiation (NULL, klass))
885 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid generic instantiation of type %s.%s at 0x%04x", klass->name_space, klass->name, ctx->ip_offset), MONO_EXCEPTION_TYPE_LOAD);
887 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Could not load type %s.%s at 0x%04x", klass->name_space, klass->name, ctx->ip_offset), MONO_EXCEPTION_TYPE_LOAD);
888 mono_loader_clear_error ();
892 if (klass->generic_class && klass->generic_class->container_class->exception_type != MONO_EXCEPTION_NONE) {
893 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Could not load type %s.%s at 0x%04x", klass->name_space, klass->name, ctx->ip_offset), MONO_EXCEPTION_TYPE_LOAD);
897 if (!klass->generic_class)
900 if (!mono_class_is_valid_generic_instantiation (ctx, klass)) {
901 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid generic type instantiation of type %s.%s at 0x%04x", klass->name_space, klass->name, ctx->ip_offset), MONO_EXCEPTION_TYPE_LOAD);
905 if (!mono_class_repect_method_constraints (ctx, klass)) {
906 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid generic type instantiation of type %s.%s (generic args don't respect target's constraints) at 0x%04x", klass->name_space, klass->name, ctx->ip_offset), MONO_EXCEPTION_TYPE_LOAD);
913 static verify_result_t
914 mono_method_is_valid_in_context (VerifyContext *ctx, MonoMethod *method)
916 if (!mono_type_is_valid_in_context (ctx, &method->klass->byval_arg))
917 return RESULT_INVALID;
919 if (!method->is_inflated)
922 if (!mono_method_is_valid_generic_instantiation (ctx, method)) {
923 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid generic method instantiation of method %s.%s::%s at 0x%04x", method->klass->name_space, method->klass->name, method->name, ctx->ip_offset), MONO_EXCEPTION_UNVERIFIABLE_IL);
924 return RESULT_INVALID;
927 if (!mono_method_repect_method_constraints (ctx, method)) {
928 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid generic method instantiation of method %s.%s::%s (generic args don't respect target's constraints) at 0x%04x", method->klass->name_space, method->klass->name, method->name, ctx->ip_offset));
929 return RESULT_UNVERIFIABLE;
935 static MonoClassField*
936 verifier_load_field (VerifyContext *ctx, int token, MonoClass **out_klass, const char *opcode) {
937 MonoClassField *field;
938 MonoClass *klass = NULL;
940 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
941 field = mono_method_get_wrapper_data (ctx->method, (guint32)token);
942 klass = field ? field->parent : NULL;
944 if (!IS_FIELD_DEF_OR_REF (token) || !token_bounds_check (ctx->image, token)) {
945 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid field token 0x%08x for %s at 0x%04x", token, opcode, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
949 field = mono_field_from_token (ctx->image, token, &klass, ctx->generic_context);
952 if (!field || !field->parent || !klass || mono_loader_get_last_error ()) {
953 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Cannot load field from token 0x%08x for %s at 0x%04x", token, opcode, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
954 mono_loader_clear_error ();
958 if (!mono_type_is_valid_in_context (ctx, &klass->byval_arg))
961 if (mono_field_get_flags (field) & FIELD_ATTRIBUTE_LITERAL) {
962 char *type_name = mono_type_get_full_name (field->parent);
963 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot reference literal field %s::%s at 0x%04x", type_name, field->name, ctx->ip_offset));
973 verifier_load_method (VerifyContext *ctx, int token, const char *opcode) {
976 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
977 method = mono_method_get_wrapper_data (ctx->method, (guint32)token);
979 if (!IS_METHOD_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
980 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid method token 0x%08x for %s at 0x%04x", token, opcode, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
984 method = mono_get_method_full (ctx->image, token, NULL, ctx->generic_context);
987 if (!method || mono_loader_get_last_error ()) {
988 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Cannot load method from token 0x%08x for %s at 0x%04x", token, opcode, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
989 mono_loader_clear_error ();
993 if (mono_method_is_valid_in_context (ctx, method) == RESULT_INVALID)
1000 verifier_load_type (VerifyContext *ctx, int token, const char *opcode) {
1003 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
1004 MonoClass *class = mono_method_get_wrapper_data (ctx->method, (guint32)token);
1005 type = class ? &class->byval_arg : NULL;
1007 if (!IS_TYPE_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
1008 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid type token 0x%08x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
1011 type = mono_type_get_full (ctx->image, token, ctx->generic_context);
1014 if (!type || mono_loader_get_last_error ()) {
1015 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Cannot load type from token 0x%08x for %s at 0x%04x", token, opcode, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
1016 mono_loader_clear_error ();
1020 if (!mono_type_is_valid_in_context (ctx, type))
1027 /* stack_slot_get_type:
1029 * Returns the stack type of @value. This value includes POINTER_MASK.
1031 * Use this function to checks that account for a managed pointer.
1034 stack_slot_get_type (ILStackDesc *value)
1036 return value->stype & RAW_TYPE_MASK;
1039 /* stack_slot_get_underlying_type:
1041 * Returns the stack type of @value. This value does not include POINTER_MASK.
1043 * Use this function is cases where the fact that the value could be a managed pointer is
1044 * irrelevant. For example, field load doesn't care about this fact of type on stack.
1047 stack_slot_get_underlying_type (ILStackDesc *value)
1049 return value->stype & TYPE_MASK;
1052 /* stack_slot_is_managed_pointer:
1054 * Returns TRUE is @value is a managed pointer.
1057 stack_slot_is_managed_pointer (ILStackDesc *value)
1059 return (value->stype & POINTER_MASK) == POINTER_MASK;
1062 /* stack_slot_is_managed_mutability_pointer:
1064 * Returns TRUE is @value is a managed mutability pointer.
1066 static G_GNUC_UNUSED gboolean
1067 stack_slot_is_managed_mutability_pointer (ILStackDesc *value)
1069 return (value->stype & CMMP_MASK) == CMMP_MASK;
1072 /* stack_slot_is_null_literal:
1074 * Returns TRUE is @value is the null literal.
1077 stack_slot_is_null_literal (ILStackDesc *value)
1079 return (value->stype & NULL_LITERAL_MASK) == NULL_LITERAL_MASK;
1083 /* stack_slot_is_this_pointer:
1085 * Returns TRUE is @value is the this literal
1088 stack_slot_is_this_pointer (ILStackDesc *value)
1090 return (value->stype & THIS_POINTER_MASK) == THIS_POINTER_MASK;
1093 /* stack_slot_is_boxed_value:
1095 * Returns TRUE is @value is a boxed value
1098 stack_slot_is_boxed_value (ILStackDesc *value)
1100 return (value->stype & BOXED_MASK) == BOXED_MASK;
1104 stack_slot_get_name (ILStackDesc *value)
1106 return type_names [value->stype & TYPE_MASK];
1109 #define APPEND_WITH_PREDICATE(PRED,NAME) do {\
1110 if (PRED (value)) { \
1112 g_string_append (str, ", "); \
1113 g_string_append (str, NAME); \
1118 stack_slot_stack_type_full_name (ILStackDesc *value)
1120 GString *str = g_string_new ("");
1122 gboolean has_pred = FALSE, first = TRUE;
1124 if ((value->stype & TYPE_MASK) != value->stype) {
1125 g_string_append(str, "[");
1126 APPEND_WITH_PREDICATE (stack_slot_is_this_pointer, "this");
1127 APPEND_WITH_PREDICATE (stack_slot_is_boxed_value, "boxed");
1128 APPEND_WITH_PREDICATE (stack_slot_is_null_literal, "null");
1129 APPEND_WITH_PREDICATE (stack_slot_is_managed_mutability_pointer, "cmmp");
1130 APPEND_WITH_PREDICATE (stack_slot_is_managed_pointer, "mp");
1134 if (mono_type_is_generic_argument (value->type) && !stack_slot_is_boxed_value (value)) {
1136 g_string_append(str, "[");
1138 g_string_append (str, ", ");
1139 g_string_append (str, "unboxed");
1144 g_string_append(str, "] ");
1146 g_string_append (str, stack_slot_get_name (value));
1148 g_string_free (str, FALSE);
1153 stack_slot_full_name (ILStackDesc *value)
1155 char *type_name = mono_type_full_name (value->type);
1156 char *stack_name = stack_slot_stack_type_full_name (value);
1157 char *res = g_strdup_printf ("%s (%s)", type_name, stack_name);
1159 g_free (stack_name);
1163 //////////////////////////////////////////////////////////////////
1165 mono_free_verify_list (GSList *list)
1167 MonoVerifyInfoExtended *info;
1170 for (tmp = list; tmp; tmp = tmp->next) {
1172 g_free (info->info.message);
1175 g_slist_free (list);
1178 #define ADD_ERROR(list,msg) \
1180 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1181 vinfo->info.status = MONO_VERIFY_ERROR; \
1182 vinfo->info.message = (msg); \
1183 (list) = g_slist_prepend ((list), vinfo); \
1186 #define ADD_WARN(list,code,msg) \
1188 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1189 vinfo->info.status = (code); \
1190 vinfo->info.message = (msg); \
1191 (list) = g_slist_prepend ((list), vinfo); \
1194 #define ADD_INVALID(list,msg) \
1196 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1197 vinfo->status = MONO_VERIFY_ERROR; \
1198 vinfo->message = (msg); \
1199 (list) = g_slist_prepend ((list), vinfo); \
1200 /*G_BREAKPOINT ();*/ \
1204 #define CHECK_STACK_UNDERFLOW(num) \
1206 if (cur_stack < (num)) \
1207 ADD_INVALID (list, g_strdup_printf ("Stack underflow at 0x%04x (%d items instead of %d)", ip_offset, cur_stack, (num))); \
1210 #define CHECK_STACK_OVERFLOW() \
1212 if (cur_stack >= max_stack) \
1213 ADD_INVALID (list, g_strdup_printf ("Maxstack exceeded at 0x%04x", ip_offset)); \
1218 in_any_block (MonoMethodHeader *header, guint offset)
1221 MonoExceptionClause *clause;
1223 for (i = 0; i < header->num_clauses; ++i) {
1224 clause = &header->clauses [i];
1225 if (MONO_OFFSET_IN_CLAUSE (clause, offset))
1227 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1229 if (MONO_OFFSET_IN_FILTER (clause, offset))
1236 * in_any_exception_block:
1238 * Returns TRUE is @offset is part of any exception clause (filter, handler, catch, finally or fault).
1241 in_any_exception_block (MonoMethodHeader *header, guint offset)
1244 MonoExceptionClause *clause;
1246 for (i = 0; i < header->num_clauses; ++i) {
1247 clause = &header->clauses [i];
1248 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1250 if (MONO_OFFSET_IN_FILTER (clause, offset))
1257 * is_valid_branch_instruction:
1259 * Verify if it's valid to perform a branch from @offset to @target.
1260 * This should be used with br and brtrue/false.
1261 * It returns 0 if valid, 1 for unverifiable and 2 for invalid.
1262 * The major difference from other similiar functions is that branching into a
1263 * finally/fault block is invalid instead of just unverifiable.
1266 is_valid_branch_instruction (MonoMethodHeader *header, guint offset, guint target)
1269 MonoExceptionClause *clause;
1271 for (i = 0; i < header->num_clauses; ++i) {
1272 clause = &header->clauses [i];
1273 /*branching into a finally block is invalid*/
1274 if ((clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY || clause->flags == MONO_EXCEPTION_CLAUSE_FAULT) &&
1275 !MONO_OFFSET_IN_HANDLER (clause, offset) &&
1276 MONO_OFFSET_IN_HANDLER (clause, target))
1279 if (clause->try_offset != target && (MONO_OFFSET_IN_CLAUSE (clause, offset) ^ MONO_OFFSET_IN_CLAUSE (clause, target)))
1281 if (MONO_OFFSET_IN_HANDLER (clause, offset) ^ MONO_OFFSET_IN_HANDLER (clause, target))
1283 if (MONO_OFFSET_IN_FILTER (clause, offset) ^ MONO_OFFSET_IN_FILTER (clause, target))
1290 * is_valid_cmp_branch_instruction:
1292 * Verify if it's valid to perform a branch from @offset to @target.
1293 * This should be used with binary comparison branching instruction, like beq, bge and similars.
1294 * It returns 0 if valid, 1 for unverifiable and 2 for invalid.
1296 * The major differences from other similar functions are that most errors lead to invalid
1297 * code and only branching out of finally, filter or fault clauses is unverifiable.
1300 is_valid_cmp_branch_instruction (MonoMethodHeader *header, guint offset, guint target)
1303 MonoExceptionClause *clause;
1305 for (i = 0; i < header->num_clauses; ++i) {
1306 clause = &header->clauses [i];
1307 /*branching out of a handler or finally*/
1308 if (clause->flags != MONO_EXCEPTION_CLAUSE_NONE &&
1309 MONO_OFFSET_IN_HANDLER (clause, offset) &&
1310 !MONO_OFFSET_IN_HANDLER (clause, target))
1313 if (clause->try_offset != target && (MONO_OFFSET_IN_CLAUSE (clause, offset) ^ MONO_OFFSET_IN_CLAUSE (clause, target)))
1315 if (MONO_OFFSET_IN_HANDLER (clause, offset) ^ MONO_OFFSET_IN_HANDLER (clause, target))
1317 if (MONO_OFFSET_IN_FILTER (clause, offset) ^ MONO_OFFSET_IN_FILTER (clause, target))
1324 * A leave can't escape a finally block
1327 is_correct_leave (MonoMethodHeader *header, guint offset, guint target)
1330 MonoExceptionClause *clause;
1332 for (i = 0; i < header->num_clauses; ++i) {
1333 clause = &header->clauses [i];
1334 if (clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY && MONO_OFFSET_IN_HANDLER (clause, offset) && !MONO_OFFSET_IN_HANDLER (clause, target))
1336 if (MONO_OFFSET_IN_FILTER (clause, offset))
1343 * A rethrow can't happen outside of a catch handler.
1346 is_correct_rethrow (MonoMethodHeader *header, guint offset)
1349 MonoExceptionClause *clause;
1351 for (i = 0; i < header->num_clauses; ++i) {
1352 clause = &header->clauses [i];
1353 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1360 * An endfinally can't happen outside of a finally/fault handler.
1363 is_correct_endfinally (MonoMethodHeader *header, guint offset)
1366 MonoExceptionClause *clause;
1368 for (i = 0; i < header->num_clauses; ++i) {
1369 clause = &header->clauses [i];
1370 if (MONO_OFFSET_IN_HANDLER (clause, offset) && (clause->flags == MONO_EXCEPTION_CLAUSE_FAULT || clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY))
1378 * An endfilter can only happens inside a filter clause.
1379 * In non-strict mode filter is allowed inside the handler clause too
1381 static MonoExceptionClause *
1382 is_correct_endfilter (VerifyContext *ctx, guint offset)
1385 MonoExceptionClause *clause;
1387 for (i = 0; i < ctx->header->num_clauses; ++i) {
1388 clause = &ctx->header->clauses [i];
1389 if (clause->flags != MONO_EXCEPTION_CLAUSE_FILTER)
1391 if (MONO_OFFSET_IN_FILTER (clause, offset))
1393 if (!IS_STRICT_MODE (ctx) && MONO_OFFSET_IN_HANDLER (clause, offset))
1401 * Non-strict endfilter can happens inside a try block or any handler block
1404 is_unverifiable_endfilter (VerifyContext *ctx, guint offset)
1407 MonoExceptionClause *clause;
1409 for (i = 0; i < ctx->header->num_clauses; ++i) {
1410 clause = &ctx->header->clauses [i];
1411 if (MONO_OFFSET_IN_CLAUSE (clause, offset))
1418 is_valid_bool_arg (ILStackDesc *arg)
1420 if (stack_slot_is_managed_pointer (arg) || stack_slot_is_boxed_value (arg) || stack_slot_is_null_literal (arg))
1424 switch (stack_slot_get_underlying_type (arg)) {
1427 case TYPE_NATIVE_INT:
1431 g_assert (arg->type);
1432 switch (arg->type->type) {
1433 case MONO_TYPE_CLASS:
1434 case MONO_TYPE_STRING:
1435 case MONO_TYPE_OBJECT:
1436 case MONO_TYPE_SZARRAY:
1437 case MONO_TYPE_ARRAY:
1438 case MONO_TYPE_FNPTR:
1441 case MONO_TYPE_GENERICINST:
1442 /*We need to check if the container class
1443 * of the generic type is a valuetype, iow:
1444 * is it a "class Foo<T>" or a "struct Foo<T>"?
1446 return !arg->type->data.generic_class->container_class->valuetype;
1454 /*Type manipulation helper*/
1456 /*Returns the byref version of the supplied MonoType*/
1458 mono_type_get_type_byref (MonoType *type)
1462 return &mono_class_from_mono_type (type)->this_arg;
1466 /*Returns the byval version of the supplied MonoType*/
1468 mono_type_get_type_byval (MonoType *type)
1472 return &mono_class_from_mono_type (type)->byval_arg;
1476 mono_type_from_stack_slot (ILStackDesc *slot)
1478 if (stack_slot_is_managed_pointer (slot))
1479 return mono_type_get_type_byref (slot->type);
1483 /*Stack manipulation code*/
1486 ensure_stack_size (ILCodeDesc *stack, int required)
1491 if (required < stack->max_size)
1494 /* We don't have to worry about the exponential growth since stack_copy prune unused space */
1495 new_size = MAX (8, MAX (required, stack->max_size * 2));
1497 g_assert (new_size >= stack->size);
1498 g_assert (new_size >= required);
1500 tmp = g_new0 (ILStackDesc, new_size);
1501 _MEM_ALLOC (sizeof (ILStackDesc) * new_size);
1505 memcpy (tmp, stack->stack, stack->size * sizeof (ILStackDesc));
1506 g_free (stack->stack);
1507 _MEM_FREE (sizeof (ILStackDesc) * stack->max_size);
1511 stack->max_size = new_size;
1515 stack_init (VerifyContext *ctx, ILCodeDesc *state)
1517 if (state->flags & IL_CODE_FLAG_STACK_INITED)
1519 state->size = state->max_size = 0;
1520 state->flags |= IL_CODE_FLAG_STACK_INITED;
1524 stack_copy (ILCodeDesc *to, ILCodeDesc *from)
1526 ensure_stack_size (to, from->size);
1527 to->size = from->size;
1529 /*stack copy happens at merge points, which have small stacks*/
1531 memcpy (to->stack, from->stack, sizeof (ILStackDesc) * from->size);
1535 copy_stack_value (ILStackDesc *to, ILStackDesc *from)
1537 to->stype = from->stype;
1538 to->type = from->type;
1539 to->method = from->method;
1543 check_underflow (VerifyContext *ctx, int size)
1545 if (ctx->eval.size < size) {
1546 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack underflow, required %d, but have %d at 0x%04x", size, ctx->eval.size, ctx->ip_offset));
1553 check_overflow (VerifyContext *ctx)
1555 if (ctx->eval.size >= ctx->max_stack) {
1556 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have stack-depth %d at 0x%04x", ctx->eval.size + 1, ctx->ip_offset));
1562 /*This reject out PTR, FNPTR and TYPEDBYREF*/
1564 check_unmanaged_pointer (VerifyContext *ctx, ILStackDesc *value)
1566 if (stack_slot_get_type (value) == TYPE_PTR) {
1567 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unmanaged pointer is not a verifiable type at 0x%04x", ctx->ip_offset));
1573 /*TODO verify if MONO_TYPE_TYPEDBYREF is not allowed here as well.*/
1575 check_unverifiable_type (VerifyContext *ctx, MonoType *type)
1577 if (type->type == MONO_TYPE_PTR || type->type == MONO_TYPE_FNPTR) {
1578 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unmanaged pointer is not a verifiable type at 0x%04x", ctx->ip_offset));
1584 static ILStackDesc *
1585 stack_push (VerifyContext *ctx)
1587 g_assert (ctx->eval.size < ctx->max_stack);
1588 g_assert (ctx->eval.size <= ctx->eval.max_size);
1590 ensure_stack_size (&ctx->eval, ctx->eval.size + 1);
1592 return & ctx->eval.stack [ctx->eval.size++];
1595 static ILStackDesc *
1596 stack_push_val (VerifyContext *ctx, int stype, MonoType *type)
1598 ILStackDesc *top = stack_push (ctx);
1604 static ILStackDesc *
1605 stack_pop (VerifyContext *ctx)
1608 g_assert (ctx->eval.size > 0);
1609 ret = ctx->eval.stack + --ctx->eval.size;
1610 if ((ret->stype & UNINIT_THIS_MASK) == UNINIT_THIS_MASK)
1611 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Found use of uninitialized 'this ptr' ref at 0x%04x", ctx->ip_offset));
1615 /* This function allows to safely pop an unititialized this ptr from
1616 * the eval stack without marking the method as unverifiable.
1618 static ILStackDesc *
1619 stack_pop_safe (VerifyContext *ctx)
1621 g_assert (ctx->eval.size > 0);
1622 return ctx->eval.stack + --ctx->eval.size;
1625 /*Positive number distance from stack top. [0] is stack top, [1] is the one below*/
1627 stack_peek (VerifyContext *ctx, int distance)
1629 g_assert (ctx->eval.size - distance > 0);
1630 return ctx->eval.stack + (ctx->eval.size - 1 - distance);
1633 static ILStackDesc *
1634 stack_push_stack_val (VerifyContext *ctx, ILStackDesc *value)
1636 ILStackDesc *top = stack_push (ctx);
1637 copy_stack_value (top, value);
1641 /* Returns the MonoType associated with the token, or NULL if it is invalid.
1643 * A boxable type can be either a reference or value type, but cannot be a byref type or an unmanaged pointer
1646 get_boxable_mono_type (VerifyContext* ctx, int token, const char *opcode)
1651 if (!(type = verifier_load_type (ctx, token, opcode)))
1654 if (type->byref && type->type != MONO_TYPE_TYPEDBYREF) {
1655 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of byref type for %s at 0x%04x", opcode, ctx->ip_offset));
1659 if (type->type == MONO_TYPE_VOID) {
1660 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of void type for %s at 0x%04x", opcode, ctx->ip_offset));
1664 if (type->type == MONO_TYPE_TYPEDBYREF)
1665 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid use of typedbyref for %s at 0x%04x", opcode, ctx->ip_offset));
1667 if (!(class = mono_class_from_mono_type (type)))
1668 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Could not retrieve type token for %s at 0x%04x", opcode, ctx->ip_offset));
1670 if (class->generic_container && type->type != MONO_TYPE_GENERICINST)
1671 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use the generic type definition in a boxable type position for %s at 0x%04x", opcode, ctx->ip_offset));
1673 check_unverifiable_type (ctx, type);
1678 /*operation result tables */
1680 static const unsigned char bin_op_table [TYPE_MAX][TYPE_MAX] = {
1681 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1682 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1683 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1684 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
1685 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1686 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1689 static const unsigned char add_table [TYPE_MAX][TYPE_MAX] = {
1690 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1691 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1692 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1693 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
1694 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_INV, TYPE_INV},
1695 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1698 static const unsigned char sub_table [TYPE_MAX][TYPE_MAX] = {
1699 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1700 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1701 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1702 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
1703 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_NATIVE_INT | NON_VERIFIABLE_RESULT, TYPE_INV},
1704 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1707 static const unsigned char int_bin_op_table [TYPE_MAX][TYPE_MAX] = {
1708 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1709 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1710 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1711 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1712 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1713 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1716 static const unsigned char shift_op_table [TYPE_MAX][TYPE_MAX] = {
1717 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1718 {TYPE_I8, TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV},
1719 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1720 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1721 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1722 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1725 static const unsigned char cmp_br_op [TYPE_MAX][TYPE_MAX] = {
1726 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1727 {TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1728 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1729 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV},
1730 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV},
1731 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1734 static const unsigned char cmp_br_eq_op [TYPE_MAX][TYPE_MAX] = {
1735 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1736 {TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1737 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_I4 | NON_VERIFIABLE_RESULT, TYPE_INV},
1738 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV},
1739 {TYPE_INV, TYPE_INV, TYPE_I4 | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_I4, TYPE_INV},
1740 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4},
1743 static const unsigned char add_ovf_un_table [TYPE_MAX][TYPE_MAX] = {
1744 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1745 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1746 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1747 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1748 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_INV, TYPE_INV},
1749 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1752 static const unsigned char sub_ovf_un_table [TYPE_MAX][TYPE_MAX] = {
1753 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1754 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1755 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1756 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1757 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_NATIVE_INT | NON_VERIFIABLE_RESULT, TYPE_INV},
1758 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1761 static const unsigned char bin_ovf_table [TYPE_MAX][TYPE_MAX] = {
1762 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1763 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1764 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1765 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1766 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1767 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1770 #ifdef MONO_VERIFIER_DEBUG
1774 dump_stack_value (ILStackDesc *value)
1776 printf ("[(%x)(%x)", value->type->type, value->stype);
1778 if (stack_slot_is_this_pointer (value))
1781 if (stack_slot_is_boxed_value (value))
1782 printf ("[boxed] ");
1784 if (stack_slot_is_null_literal (value))
1787 if (stack_slot_is_managed_mutability_pointer (value))
1788 printf ("Controled Mutability MP: ");
1790 if (stack_slot_is_managed_pointer (value))
1791 printf ("Managed Pointer to: ");
1793 switch (stack_slot_get_underlying_type (value)) {
1795 printf ("invalid type]");
1803 case TYPE_NATIVE_INT:
1804 printf ("native int]");
1807 printf ("float64]");
1810 printf ("unmanaged pointer]");
1813 switch (value->type->type) {
1814 case MONO_TYPE_CLASS:
1815 case MONO_TYPE_VALUETYPE:
1816 printf ("complex] (%s)", value->type->data.klass->name);
1818 case MONO_TYPE_STRING:
1819 printf ("complex] (string)");
1821 case MONO_TYPE_OBJECT:
1822 printf ("complex] (object)");
1824 case MONO_TYPE_SZARRAY:
1825 printf ("complex] (%s [])", value->type->data.klass->name);
1827 case MONO_TYPE_ARRAY:
1828 printf ("complex] (%s [%d %d %d])",
1829 value->type->data.array->eklass->name,
1830 value->type->data.array->rank,
1831 value->type->data.array->numsizes,
1832 value->type->data.array->numlobounds);
1834 case MONO_TYPE_GENERICINST:
1835 printf ("complex] (inst of %s )", value->type->data.generic_class->container_class->name);
1838 printf ("complex] (type generic param !%d - %s) ", value->type->data.generic_param->num, mono_generic_param_info (value->type->data.generic_param)->name);
1840 case MONO_TYPE_MVAR:
1841 printf ("complex] (method generic param !!%d - %s) ", value->type->data.generic_param->num, mono_generic_param_info (value->type->data.generic_param)->name);
1844 //should be a boxed value
1845 char * name = mono_type_full_name (value->type);
1846 printf ("complex] %s", name);
1852 printf ("unknown stack %x type]\n", value->stype);
1853 g_assert_not_reached ();
1858 dump_stack_state (ILCodeDesc *state)
1862 printf ("(%d) ", state->size);
1863 for (i = 0; i < state->size; ++i)
1864 dump_stack_value (state->stack + i);
1869 /*Returns TRUE if candidate array type can be assigned to target.
1870 *Both parameters MUST be of type MONO_TYPE_ARRAY (target->type == MONO_TYPE_ARRAY)
1873 is_array_type_compatible (MonoType *target, MonoType *candidate)
1875 MonoArrayType *left = target->data.array;
1876 MonoArrayType *right = candidate->data.array;
1878 g_assert (target->type == MONO_TYPE_ARRAY);
1879 g_assert (candidate->type == MONO_TYPE_ARRAY);
1881 if (left->rank != right->rank)
1884 return verifier_class_is_assignable_from (left->eklass, right->eklass);
1888 get_stack_type (MonoType *type)
1891 int type_kind = type->type;
1893 mask = POINTER_MASK;
1894 /*TODO handle CMMP_MASK */
1897 switch (type_kind) {
1900 case MONO_TYPE_BOOLEAN:
1903 case MONO_TYPE_CHAR:
1906 return TYPE_I4 | mask;
1910 return TYPE_NATIVE_INT | mask;
1912 /* FIXME: the spec says that you cannot have a pointer to method pointer, do we need to check this here? */
1913 case MONO_TYPE_FNPTR:
1915 case MONO_TYPE_TYPEDBYREF:
1916 return TYPE_PTR | mask;
1919 case MONO_TYPE_MVAR:
1921 case MONO_TYPE_CLASS:
1922 case MONO_TYPE_STRING:
1923 case MONO_TYPE_OBJECT:
1924 case MONO_TYPE_SZARRAY:
1925 case MONO_TYPE_ARRAY:
1926 return TYPE_COMPLEX | mask;
1930 return TYPE_I8 | mask;
1934 return TYPE_R8 | mask;
1936 case MONO_TYPE_GENERICINST:
1937 case MONO_TYPE_VALUETYPE:
1938 if (mono_type_is_enum_type (type)) {
1939 type = mono_type_get_underlying_type_any (type);
1942 type_kind = type->type;
1945 return TYPE_COMPLEX | mask;
1953 /* convert MonoType to ILStackDesc format (stype) */
1955 set_stack_value (VerifyContext *ctx, ILStackDesc *stack, MonoType *type, int take_addr)
1958 int type_kind = type->type;
1960 if (type->byref || take_addr)
1961 mask = POINTER_MASK;
1962 /* TODO handle CMMP_MASK */
1967 switch (type_kind) {
1970 case MONO_TYPE_BOOLEAN:
1973 case MONO_TYPE_CHAR:
1976 stack->stype = TYPE_I4 | mask;
1980 stack->stype = TYPE_NATIVE_INT | mask;
1983 /*FIXME: Do we need to check if it's a pointer to the method pointer? The spec says it' illegal to have that.*/
1984 case MONO_TYPE_FNPTR:
1986 case MONO_TYPE_TYPEDBYREF:
1987 stack->stype = TYPE_PTR | mask;
1990 case MONO_TYPE_CLASS:
1991 case MONO_TYPE_STRING:
1992 case MONO_TYPE_OBJECT:
1993 case MONO_TYPE_SZARRAY:
1994 case MONO_TYPE_ARRAY:
1997 case MONO_TYPE_MVAR:
1998 stack->stype = TYPE_COMPLEX | mask;
2003 stack->stype = TYPE_I8 | mask;
2007 stack->stype = TYPE_R8 | mask;
2009 case MONO_TYPE_GENERICINST:
2010 case MONO_TYPE_VALUETYPE:
2011 if (mono_type_is_enum_type (type)) {
2012 MonoType *utype = mono_type_get_underlying_type_any (type);
2014 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Could not resolve underlying type of %x at %d", type->type, ctx->ip_offset));
2018 type_kind = type->type;
2021 stack->stype = TYPE_COMPLEX | mask;
2025 VERIFIER_DEBUG ( printf ("unknown type 0x%02x in eval stack type\n", type->type); );
2026 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Illegal value set on stack 0x%02x at %d", type->type, ctx->ip_offset));
2033 * init_stack_with_value_at_exception_boundary:
2035 * Initialize the stack and push a given type.
2036 * The instruction is marked as been on the exception boundary.
2039 init_stack_with_value_at_exception_boundary (VerifyContext *ctx, ILCodeDesc *code, MonoClass *klass)
2042 MonoType *type = mono_class_inflate_generic_type_checked (&klass->byval_arg, ctx->generic_context, &error);
2044 if (!mono_error_ok (&error)) {
2045 char *name = mono_type_get_full_name (klass);
2046 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid class %s used for exception", name));
2048 mono_error_cleanup (&error);
2052 if (!ctx->max_stack) {
2053 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack overflow at 0x%04x", ctx->ip_offset));
2057 stack_init (ctx, code);
2058 ensure_stack_size (code, 1);
2059 set_stack_value (ctx, code->stack, type, FALSE);
2060 ctx->exception_types = g_slist_prepend (ctx->exception_types, type);
2062 code->flags |= IL_CODE_FLAG_WAS_TARGET;
2063 if (mono_type_is_generic_argument (type))
2064 code->stack->stype |= BOXED_MASK;
2068 get_ienumerable_class (void)
2070 static MonoClass* generic_ienumerable_class = NULL;
2072 if (generic_ienumerable_class == NULL)
2073 generic_ienumerable_class = mono_class_from_name (mono_defaults.corlib,
2074 "System.Collections.Generic", "IEnumerable`1");
2075 return generic_ienumerable_class;
2079 get_icollection_class (void)
2081 static MonoClass* generic_icollection_class = NULL;
2083 if (generic_icollection_class == NULL)
2084 generic_icollection_class = mono_class_from_name (mono_defaults.corlib,
2085 "System.Collections.Generic", "ICollection`1");
2086 return generic_icollection_class;
2090 get_ireadonlylist_class (void)
2092 static MonoClass* generic_ireadonlylist_class = NULL;
2094 if (generic_ireadonlylist_class == NULL)
2095 generic_ireadonlylist_class = mono_class_from_name (mono_defaults.corlib,
2096 "System.Collections.Generic", "IReadOnlyList`1");
2097 return generic_ireadonlylist_class;
2101 get_ireadonlycollection_class (void)
2103 static MonoClass* generic_ireadonlycollection_class = NULL;
2105 if (generic_ireadonlycollection_class == NULL)
2106 generic_ireadonlycollection_class = mono_class_from_name (mono_defaults.corlib,
2107 "System.Collections.Generic", "IReadOnlyCollection`1");
2108 return generic_ireadonlycollection_class;
2112 inflate_class_one_arg (MonoClass *gtype, MonoClass *arg0)
2115 args [0] = &arg0->byval_arg;
2117 return mono_class_bind_generic_parameters (gtype, 1, args, FALSE);
2121 verifier_inflate_and_check_compat (MonoClass *target, MonoClass *gtd, MonoClass *arg)
2124 if (!(tmp = inflate_class_one_arg (gtd, arg)))
2126 if (mono_class_is_variant_compatible (target, tmp, TRUE))
2132 verifier_class_is_assignable_from (MonoClass *target, MonoClass *candidate)
2134 MonoClass *iface_gtd;
2136 if (target == candidate)
2139 if (mono_class_has_variant_generic_params (target)) {
2140 if (MONO_CLASS_IS_INTERFACE (target)) {
2141 if (MONO_CLASS_IS_INTERFACE (candidate) && mono_class_is_variant_compatible (target, candidate, TRUE))
2144 if (candidate->rank == 1) {
2145 if (verifier_inflate_and_check_compat (target, mono_defaults.generic_ilist_class, candidate->element_class))
2147 if (verifier_inflate_and_check_compat (target, get_icollection_class (), candidate->element_class))
2149 if (verifier_inflate_and_check_compat (target, get_ienumerable_class (), candidate->element_class))
2151 if (verifier_inflate_and_check_compat (target, get_ireadonlylist_class (), candidate->element_class))
2153 if (verifier_inflate_and_check_compat (target, get_ireadonlycollection_class (), candidate->element_class))
2158 while (candidate && candidate != mono_defaults.object_class) {
2159 mono_class_setup_interfaces (candidate, &error);
2160 if (!mono_error_ok (&error)) {
2161 mono_error_cleanup (&error);
2165 /*klass is a generic variant interface, We need to extract from oklass a list of ifaces which are viable candidates.*/
2166 for (i = 0; i < candidate->interface_offsets_count; ++i) {
2167 MonoClass *iface = candidate->interfaces_packed [i];
2168 if (mono_class_is_variant_compatible (target, iface, TRUE))
2172 for (i = 0; i < candidate->interface_count; ++i) {
2173 MonoClass *iface = candidate->interfaces [i];
2174 if (mono_class_is_variant_compatible (target, iface, TRUE))
2177 candidate = candidate->parent;
2180 } else if (target->delegate) {
2181 if (mono_class_is_variant_compatible (target, candidate, TRUE))
2187 if (mono_class_is_assignable_from (target, candidate))
2190 if (!MONO_CLASS_IS_INTERFACE (target) || !target->generic_class || candidate->rank != 1)
2193 iface_gtd = target->generic_class->container_class;
2194 if (iface_gtd != mono_defaults.generic_ilist_class && iface_gtd != get_icollection_class () && iface_gtd != get_ienumerable_class ())
2197 target = mono_class_from_mono_type (target->generic_class->context.class_inst->type_argv [0]);
2198 candidate = candidate->element_class;
2203 /*Verify if type 'candidate' can be stored in type 'target'.
2205 * If strict, check for the underlying type and not the verification stack types
2208 verify_type_compatibility_full (VerifyContext *ctx, MonoType *target, MonoType *candidate, gboolean strict)
2210 #define IS_ONE_OF3(T, A, B, C) (T == A || T == B || T == C)
2211 #define IS_ONE_OF2(T, A, B) (T == A || T == B)
2213 MonoType *original_candidate = candidate;
2214 VERIFIER_DEBUG ( printf ("checking type compatibility %s x %s strict %d\n", mono_type_full_name (target), mono_type_full_name (candidate), strict); );
2216 /*only one is byref */
2217 if (candidate->byref ^ target->byref) {
2218 /* converting from native int to byref*/
2219 if (get_stack_type (candidate) == TYPE_NATIVE_INT && target->byref) {
2220 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("using byref native int at 0x%04x", ctx->ip_offset));
2225 strict |= target->byref;
2226 /*From now on we don't care about byref anymore, so it's ok to discard it here*/
2227 candidate = mono_type_get_underlying_type_any (candidate);
2230 switch (target->type) {
2231 case MONO_TYPE_VOID:
2232 return candidate->type == MONO_TYPE_VOID;
2235 case MONO_TYPE_BOOLEAN:
2237 return IS_ONE_OF3 (candidate->type, MONO_TYPE_I1, MONO_TYPE_U1, MONO_TYPE_BOOLEAN);
2240 case MONO_TYPE_CHAR:
2242 return IS_ONE_OF3 (candidate->type, MONO_TYPE_I2, MONO_TYPE_U2, MONO_TYPE_CHAR);
2244 case MONO_TYPE_U4: {
2245 gboolean is_native_int = IS_ONE_OF2 (candidate->type, MONO_TYPE_I, MONO_TYPE_U);
2246 gboolean is_int4 = IS_ONE_OF2 (candidate->type, MONO_TYPE_I4, MONO_TYPE_U4);
2248 return is_native_int || is_int4;
2249 return is_native_int || get_stack_type (candidate) == TYPE_I4;
2254 return IS_ONE_OF2 (candidate->type, MONO_TYPE_I8, MONO_TYPE_U8);
2259 return candidate->type == target->type;
2260 return IS_ONE_OF2 (candidate->type, MONO_TYPE_R4, MONO_TYPE_R8);
2264 gboolean is_native_int = IS_ONE_OF2 (candidate->type, MONO_TYPE_I, MONO_TYPE_U);
2265 gboolean is_int4 = IS_ONE_OF2 (candidate->type, MONO_TYPE_I4, MONO_TYPE_U4);
2267 return is_native_int || is_int4;
2268 return is_native_int || get_stack_type (candidate) == TYPE_I4;
2272 if (candidate->type != MONO_TYPE_PTR)
2274 /* check the underlying type */
2275 return verify_type_compatibility_full (ctx, target->data.type, candidate->data.type, TRUE);
2277 case MONO_TYPE_FNPTR: {
2278 MonoMethodSignature *left, *right;
2279 if (candidate->type != MONO_TYPE_FNPTR)
2282 left = mono_type_get_signature (target);
2283 right = mono_type_get_signature (candidate);
2284 return mono_metadata_signature_equal (left, right) && left->call_convention == right->call_convention;
2287 case MONO_TYPE_GENERICINST: {
2288 MonoClass *target_klass;
2289 MonoClass *candidate_klass;
2290 if (mono_type_is_enum_type (target)) {
2291 target = mono_type_get_underlying_type_any (target);
2297 * VAR / MVAR compatibility must be checked by verify_stack_type_compatibility
2298 * to take boxing status into account.
2300 if (mono_type_is_generic_argument (original_candidate))
2303 target_klass = mono_class_from_mono_type (target);
2304 candidate_klass = mono_class_from_mono_type (candidate);
2305 if (mono_class_is_nullable (target_klass)) {
2306 if (!mono_class_is_nullable (candidate_klass))
2308 return target_klass == candidate_klass;
2310 return verifier_class_is_assignable_from (target_klass, candidate_klass);
2313 case MONO_TYPE_STRING:
2314 return candidate->type == MONO_TYPE_STRING;
2316 case MONO_TYPE_CLASS:
2318 * VAR / MVAR compatibility must be checked by verify_stack_type_compatibility
2319 * to take boxing status into account.
2321 if (mono_type_is_generic_argument (original_candidate))
2324 if (candidate->type == MONO_TYPE_VALUETYPE)
2327 /* If candidate is an enum it should return true for System.Enum and supertypes.
2328 * That's why here we use the original type and not the underlying type.
2330 return verifier_class_is_assignable_from (target->data.klass, mono_class_from_mono_type (original_candidate));
2332 case MONO_TYPE_OBJECT:
2333 return MONO_TYPE_IS_REFERENCE (candidate);
2335 case MONO_TYPE_SZARRAY: {
2338 if (candidate->type != MONO_TYPE_SZARRAY)
2341 left = mono_class_from_mono_type (target);
2342 right = mono_class_from_mono_type (candidate);
2344 return verifier_class_is_assignable_from (left, right);
2347 case MONO_TYPE_ARRAY:
2348 if (candidate->type != MONO_TYPE_ARRAY)
2350 return is_array_type_compatible (target, candidate);
2352 case MONO_TYPE_TYPEDBYREF:
2353 return candidate->type == MONO_TYPE_TYPEDBYREF;
2355 case MONO_TYPE_VALUETYPE: {
2356 MonoClass *target_klass;
2357 MonoClass *candidate_klass;
2359 if (candidate->type == MONO_TYPE_CLASS)
2362 target_klass = mono_class_from_mono_type (target);
2363 candidate_klass = mono_class_from_mono_type (candidate);
2364 if (target_klass == candidate_klass)
2366 if (mono_type_is_enum_type (target)) {
2367 target = mono_type_get_underlying_type_any (target);
2376 if (candidate->type != MONO_TYPE_VAR)
2378 return mono_type_get_generic_param_num (candidate) == mono_type_get_generic_param_num (target);
2380 case MONO_TYPE_MVAR:
2381 if (candidate->type != MONO_TYPE_MVAR)
2383 return mono_type_get_generic_param_num (candidate) == mono_type_get_generic_param_num (target);
2386 VERIFIER_DEBUG ( printf ("unknown store type %d\n", target->type); );
2387 g_assert_not_reached ();
2396 verify_type_compatibility (VerifyContext *ctx, MonoType *target, MonoType *candidate)
2398 return verify_type_compatibility_full (ctx, target, candidate, FALSE);
2402 * Returns the generic param bound to the context been verified.
2405 static MonoGenericParam*
2406 get_generic_param (VerifyContext *ctx, MonoType *param)
2408 guint16 param_num = mono_type_get_generic_param_num (param);
2409 if (param->type == MONO_TYPE_VAR) {
2410 if (!ctx->generic_context->class_inst || ctx->generic_context->class_inst->type_argc <= param_num) {
2411 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid generic type argument %d", param_num));
2414 return ctx->generic_context->class_inst->type_argv [param_num]->data.generic_param;
2417 /*param must be a MVAR */
2418 if (!ctx->generic_context->method_inst || ctx->generic_context->method_inst->type_argc <= param_num) {
2419 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid generic method argument %d", param_num));
2422 return ctx->generic_context->method_inst->type_argv [param_num]->data.generic_param;
2427 recursive_boxed_constraint_type_check (VerifyContext *ctx, MonoType *type, MonoClass *constraint_class, int recursion_level)
2429 MonoType *constraint_type = &constraint_class->byval_arg;
2430 if (recursion_level <= 0)
2433 if (verify_type_compatibility_full (ctx, type, mono_type_get_type_byval (constraint_type), FALSE))
2436 if (mono_type_is_generic_argument (constraint_type)) {
2437 MonoGenericParam *param = get_generic_param (ctx, constraint_type);
2441 for (class = mono_generic_param_info (param)->constraints; class && *class; ++class) {
2442 if (recursive_boxed_constraint_type_check (ctx, type, *class, recursion_level - 1))
2450 * is_compatible_boxed_valuetype:
2452 * Returns TRUE if @candidate / @stack is a valid boxed valuetype.
2454 * @type The source type. It it tested to be of the proper type.
2455 * @candidate type of the boxed valuetype.
2456 * @stack stack slot of the boxed valuetype, separate from @candidade since one could be changed before calling this function
2457 * @strict if TRUE candidate must be boxed compatible to the target type
2461 is_compatible_boxed_valuetype (VerifyContext *ctx, MonoType *type, MonoType *candidate, ILStackDesc *stack, gboolean strict)
2463 if (!stack_slot_is_boxed_value (stack))
2465 if (type->byref || candidate->byref)
2468 if (mono_type_is_generic_argument (candidate)) {
2469 MonoGenericParam *param = get_generic_param (ctx, candidate);
2474 for (class = mono_generic_param_info (param)->constraints; class && *class; ++class) {
2475 /*256 should be enough since there can't be more than 255 generic arguments.*/
2476 if (recursive_boxed_constraint_type_check (ctx, type, *class, 256))
2481 if (mono_type_is_generic_argument (type))
2487 return MONO_TYPE_IS_REFERENCE (type) && verifier_class_is_assignable_from (mono_class_from_mono_type (type), mono_class_from_mono_type (candidate));
2491 verify_stack_type_compatibility_full (VerifyContext *ctx, MonoType *type, ILStackDesc *stack, gboolean drop_byref, gboolean valuetype_must_be_boxed)
2493 MonoType *candidate = mono_type_from_stack_slot (stack);
2494 if (MONO_TYPE_IS_REFERENCE (type) && !type->byref && stack_slot_is_null_literal (stack))
2497 if (is_compatible_boxed_valuetype (ctx, type, candidate, stack, TRUE))
2500 if (valuetype_must_be_boxed && !stack_slot_is_boxed_value (stack) && !MONO_TYPE_IS_REFERENCE (candidate))
2503 if (!valuetype_must_be_boxed && stack_slot_is_boxed_value (stack))
2507 return verify_type_compatibility_full (ctx, type, mono_type_get_type_byval (candidate), FALSE);
2509 return verify_type_compatibility_full (ctx, type, candidate, FALSE);
2513 verify_stack_type_compatibility (VerifyContext *ctx, MonoType *type, ILStackDesc *stack)
2515 return verify_stack_type_compatibility_full (ctx, type, stack, FALSE, FALSE);
2519 mono_delegate_type_equal (MonoType *target, MonoType *candidate)
2521 if (candidate->byref ^ target->byref)
2524 switch (target->type) {
2525 case MONO_TYPE_VOID:
2528 case MONO_TYPE_BOOLEAN:
2531 case MONO_TYPE_CHAR:
2540 case MONO_TYPE_STRING:
2541 case MONO_TYPE_TYPEDBYREF:
2542 return candidate->type == target->type;
2545 if (candidate->type != MONO_TYPE_PTR)
2547 return mono_delegate_type_equal (target->data.type, candidate->data.type);
2549 case MONO_TYPE_FNPTR:
2550 if (candidate->type != MONO_TYPE_FNPTR)
2552 return mono_delegate_signature_equal (mono_type_get_signature (target), mono_type_get_signature (candidate), FALSE);
2554 case MONO_TYPE_GENERICINST: {
2555 MonoClass *target_klass;
2556 MonoClass *candidate_klass;
2557 target_klass = mono_class_from_mono_type (target);
2558 candidate_klass = mono_class_from_mono_type (candidate);
2559 /*FIXME handle nullables and enum*/
2560 return verifier_class_is_assignable_from (target_klass, candidate_klass);
2562 case MONO_TYPE_OBJECT:
2563 return MONO_TYPE_IS_REFERENCE (candidate);
2565 case MONO_TYPE_CLASS:
2566 return verifier_class_is_assignable_from(target->data.klass, mono_class_from_mono_type (candidate));
2568 case MONO_TYPE_SZARRAY:
2569 if (candidate->type != MONO_TYPE_SZARRAY)
2571 return verifier_class_is_assignable_from (mono_class_from_mono_type (target)->element_class, mono_class_from_mono_type (candidate)->element_class);
2573 case MONO_TYPE_ARRAY:
2574 if (candidate->type != MONO_TYPE_ARRAY)
2576 return is_array_type_compatible (target, candidate);
2578 case MONO_TYPE_VALUETYPE:
2579 /*FIXME handle nullables and enum*/
2580 return mono_class_from_mono_type (candidate) == mono_class_from_mono_type (target);
2583 return candidate->type == MONO_TYPE_VAR && mono_type_get_generic_param_num (target) == mono_type_get_generic_param_num (candidate);
2586 case MONO_TYPE_MVAR:
2587 return candidate->type == MONO_TYPE_MVAR && mono_type_get_generic_param_num (target) == mono_type_get_generic_param_num (candidate);
2591 VERIFIER_DEBUG ( printf ("Unknown type %d. Implement me!\n", target->type); );
2592 g_assert_not_reached ();
2598 mono_delegate_param_equal (MonoType *delegate, MonoType *method)
2600 if (mono_metadata_type_equal_full (delegate, method, TRUE))
2603 return mono_delegate_type_equal (method, delegate);
2607 mono_delegate_ret_equal (MonoType *delegate, MonoType *method)
2609 if (mono_metadata_type_equal_full (delegate, method, TRUE))
2612 return mono_delegate_type_equal (delegate, method);
2616 * mono_delegate_signature_equal:
2618 * Compare two signatures in the way expected by delegates.
2620 * This function only exists due to the fact that it should ignore the 'has_this' part of the signature.
2622 * FIXME can this function be eliminated and proper metadata functionality be used?
2625 mono_delegate_signature_equal (MonoMethodSignature *delegate_sig, MonoMethodSignature *method_sig, gboolean is_static_ldftn)
2628 int method_offset = is_static_ldftn ? 1 : 0;
2630 if (delegate_sig->param_count + method_offset != method_sig->param_count)
2633 if (delegate_sig->call_convention != method_sig->call_convention)
2636 for (i = 0; i < delegate_sig->param_count; i++) {
2637 MonoType *p1 = delegate_sig->params [i];
2638 MonoType *p2 = method_sig->params [i + method_offset];
2640 if (!mono_delegate_param_equal (p1, p2))
2644 if (!mono_delegate_ret_equal (delegate_sig->ret, method_sig->ret))
2651 mono_verifier_is_signature_compatible (MonoMethodSignature *target, MonoMethodSignature *candidate)
2653 return mono_delegate_signature_equal (target, candidate, FALSE);
2657 * verify_ldftn_delegate:
2659 * Verify properties of ldftn based delegates.
2662 verify_ldftn_delegate (VerifyContext *ctx, MonoClass *delegate, ILStackDesc *value, ILStackDesc *funptr)
2664 MonoMethod *method = funptr->method;
2666 /*ldftn non-final virtuals only allowed if method is not static,
2667 * the object is a this arg (comes from a ldarg.0), and there is no starg.0.
2668 * This rules doesn't apply if the object on stack is a boxed valuetype.
2670 if ((method->flags & METHOD_ATTRIBUTE_VIRTUAL) && !(method->flags & METHOD_ATTRIBUTE_FINAL) && !(method->klass->flags & TYPE_ATTRIBUTE_SEALED) && !stack_slot_is_boxed_value (value)) {
2671 /*A stdarg 0 must not happen, we fail here only in fail fast mode to avoid double error reports*/
2672 if (IS_FAIL_FAST_MODE (ctx) && ctx->has_this_store)
2673 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid ldftn with virtual function in method with stdarg 0 at 0x%04x", ctx->ip_offset));
2675 /*current method must not be static*/
2676 if (ctx->method->flags & METHOD_ATTRIBUTE_STATIC)
2677 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid ldftn with virtual function at 0x%04x", ctx->ip_offset));
2679 /*value is the this pointer, loaded using ldarg.0 */
2680 if (!stack_slot_is_this_pointer (value))
2681 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid object argument, it is not the this pointer, to ldftn with virtual method at 0x%04x", ctx->ip_offset));
2683 ctx->code [ctx->ip_offset].flags |= IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL;
2688 * verify_delegate_compatibility:
2690 * Verify delegate creation sequence.
2694 verify_delegate_compatibility (VerifyContext *ctx, MonoClass *delegate, ILStackDesc *value, ILStackDesc *funptr)
2696 #define IS_VALID_OPCODE(offset, opcode) (ip [ip_offset - offset] == opcode && (ctx->code [ip_offset - offset].flags & IL_CODE_FLAG_SEEN))
2697 #define IS_LOAD_FUN_PTR(kind) (IS_VALID_OPCODE (6, CEE_PREFIX1) && ip [ip_offset - 5] == kind)
2699 MonoMethod *invoke, *method;
2700 const guint8 *ip = ctx->header->code;
2701 guint32 ip_offset = ctx->ip_offset;
2702 gboolean is_static_ldftn = FALSE, is_first_arg_bound = FALSE;
2704 if (stack_slot_get_type (funptr) != TYPE_PTR || !funptr->method) {
2705 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid function pointer parameter for delegate constructor at 0x%04x", ctx->ip_offset));
2709 invoke = mono_get_delegate_invoke (delegate);
2710 method = funptr->method;
2712 if (!method || !mono_method_signature (method)) {
2713 char *name = mono_type_get_full_name (delegate);
2714 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid method on stack to create delegate %s construction at 0x%04x", name, ctx->ip_offset));
2719 if (!invoke || !mono_method_signature (invoke)) {
2720 char *name = mono_type_get_full_name (delegate);
2721 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Delegate type %s with bad Invoke method at 0x%04x", name, ctx->ip_offset));
2726 is_static_ldftn = (ip_offset > 5 && IS_LOAD_FUN_PTR (CEE_LDFTN)) && method->flags & METHOD_ATTRIBUTE_STATIC;
2728 if (is_static_ldftn)
2729 is_first_arg_bound = mono_method_signature (invoke)->param_count + 1 == mono_method_signature (method)->param_count;
2731 if (!mono_delegate_signature_equal (mono_method_signature (invoke), mono_method_signature (method), is_first_arg_bound)) {
2732 char *fun_sig = mono_signature_get_desc (mono_method_signature (method), FALSE);
2733 char *invoke_sig = mono_signature_get_desc (mono_method_signature (invoke), FALSE);
2734 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Function pointer signature '%s' doesn't match delegate's signature '%s' at 0x%04x", fun_sig, invoke_sig, ctx->ip_offset));
2736 g_free (invoke_sig);
2740 * Delegate code sequences:
2746 * [-6] ldvirtftn token
2750 if (ip_offset > 5 && IS_LOAD_FUN_PTR (CEE_LDFTN)) {
2751 verify_ldftn_delegate (ctx, delegate, value, funptr);
2752 } else if (ip_offset > 6 && IS_VALID_OPCODE (7, CEE_DUP) && IS_LOAD_FUN_PTR (CEE_LDVIRTFTN)) {
2753 ctx->code [ip_offset - 6].flags |= IL_CODE_DELEGATE_SEQUENCE;
2755 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid code sequence for delegate creation at 0x%04x", ctx->ip_offset));
2757 ctx->code [ip_offset].flags |= IL_CODE_DELEGATE_SEQUENCE;
2760 if (is_first_arg_bound) {
2761 if (mono_method_signature (method)->param_count == 0 || !verify_stack_type_compatibility_full (ctx, mono_method_signature (method)->params [0], value, FALSE, TRUE))
2762 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("This object not compatible with function pointer for delegate creation at 0x%04x", ctx->ip_offset));
2764 if (method->flags & METHOD_ATTRIBUTE_STATIC) {
2765 if (!stack_slot_is_null_literal (value) && !is_first_arg_bound)
2766 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Non-null this args used with static function for delegate creation at 0x%04x", ctx->ip_offset));
2768 if (!verify_stack_type_compatibility_full (ctx, &method->klass->byval_arg, value, FALSE, TRUE) && !stack_slot_is_null_literal (value))
2769 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("This object not compatible with function pointer for delegate creation at 0x%04x", ctx->ip_offset));
2773 if (stack_slot_get_type (value) != TYPE_COMPLEX)
2774 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid first parameter for delegate creation at 0x%04x", ctx->ip_offset));
2776 #undef IS_VALID_OPCODE
2777 #undef IS_LOAD_FUN_PTR
2780 /* implement the opcode checks*/
2782 push_arg (VerifyContext *ctx, unsigned int arg, int take_addr)
2786 if (arg >= ctx->max_args) {
2788 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have argument %d", arg + 1));
2790 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method doesn't have argument %d", arg + 1));
2791 if (check_overflow (ctx)) //FIXME: what sane value could we ever push?
2792 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
2794 } else if (check_overflow (ctx)) {
2795 /*We must let the value be pushed, otherwise we would get an underflow error*/
2796 check_unverifiable_type (ctx, ctx->params [arg]);
2797 if (ctx->params [arg]->byref && take_addr)
2798 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ByRef of ByRef at 0x%04x", ctx->ip_offset));
2799 top = stack_push (ctx);
2800 if (!set_stack_value (ctx, top, ctx->params [arg], take_addr))
2803 if (arg == 0 && !(ctx->method->flags & METHOD_ATTRIBUTE_STATIC)) {
2805 ctx->has_this_store = TRUE;
2807 top->stype |= THIS_POINTER_MASK;
2808 if (mono_method_is_constructor (ctx->method) && !ctx->super_ctor_called && !ctx->method->klass->valuetype)
2809 top->stype |= UNINIT_THIS_MASK;
2815 push_local (VerifyContext *ctx, guint32 arg, int take_addr)
2817 if (arg >= ctx->num_locals) {
2818 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have local %d", arg + 1));
2819 } else if (check_overflow (ctx)) {
2820 /*We must let the value be pushed, otherwise we would get an underflow error*/
2821 check_unverifiable_type (ctx, ctx->locals [arg]);
2822 if (ctx->locals [arg]->byref && take_addr)
2823 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ByRef of ByRef at 0x%04x", ctx->ip_offset));
2825 set_stack_value (ctx, stack_push (ctx), ctx->locals [arg], take_addr);
2830 store_arg (VerifyContext *ctx, guint32 arg)
2834 if (arg >= ctx->max_args) {
2835 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method doesn't have argument %d at 0x%04x", arg + 1, ctx->ip_offset));
2836 if (check_underflow (ctx, 1))
2841 if (check_underflow (ctx, 1)) {
2842 value = stack_pop (ctx);
2843 if (!verify_stack_type_compatibility (ctx, ctx->params [arg], value)) {
2844 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type %s in argument store at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
2847 if (arg == 0 && !(ctx->method->flags & METHOD_ATTRIBUTE_STATIC))
2848 ctx->has_this_store = 1;
2852 store_local (VerifyContext *ctx, guint32 arg)
2855 if (arg >= ctx->num_locals) {
2856 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have local var %d at 0x%04x", arg + 1, ctx->ip_offset));
2860 /*TODO verify definite assigment */
2861 if (!check_underflow (ctx, 1))
2864 value = stack_pop (ctx);
2865 if (ctx->locals [arg]->byref && stack_slot_is_managed_mutability_pointer (value))
2866 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly managed reference when storing on a local variable at 0x%04x", ctx->ip_offset));
2868 if (!verify_stack_type_compatibility (ctx, ctx->locals [arg], value)) {
2869 char *expected = mono_type_full_name (ctx->locals [arg]);
2870 char *found = stack_slot_full_name (value);
2871 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type '%s' on stack cannot be stored to local %d with type '%s' at 0x%04x",
2881 /*FIXME add and sub needs special care here*/
2883 do_binop (VerifyContext *ctx, unsigned int opcode, const unsigned char table [TYPE_MAX][TYPE_MAX])
2885 ILStackDesc *a, *b, *top;
2886 int idxa, idxb, complexMerge = 0;
2889 if (!check_underflow (ctx, 2))
2891 b = stack_pop (ctx);
2892 a = stack_pop (ctx);
2894 idxa = stack_slot_get_underlying_type (a);
2895 if (stack_slot_is_managed_pointer (a)) {
2900 idxb = stack_slot_get_underlying_type (b);
2901 if (stack_slot_is_managed_pointer (b)) {
2908 res = table [idxa][idxb];
2910 VERIFIER_DEBUG ( printf ("binop res %d\n", res); );
2911 VERIFIER_DEBUG ( printf ("idxa %d idxb %d\n", idxa, idxb); );
2913 top = stack_push (ctx);
2914 if (res == TYPE_INV) {
2915 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Binary instruction applyed to ill formed stack (%s x %s)", stack_slot_get_name (a), stack_slot_get_name (b)));
2916 copy_stack_value (top, a);
2920 if (res & NON_VERIFIABLE_RESULT) {
2921 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Binary instruction is not verifiable (%s x %s)", stack_slot_get_name (a), stack_slot_get_name (b)));
2923 res = res & ~NON_VERIFIABLE_RESULT;
2926 if (complexMerge && res == TYPE_PTR) {
2927 if (complexMerge == 1)
2928 copy_stack_value (top, a);
2929 else if (complexMerge == 2)
2930 copy_stack_value (top, b);
2932 * There is no need to merge the type of two pointers.
2933 * The only valid operation is subtraction, that returns a native
2934 * int as result and can be used with any 2 pointer kinds.
2935 * This is valid acording to Patition III 1.1.4
2944 do_boolean_branch_op (VerifyContext *ctx, int delta)
2946 int target = ctx->ip_offset + delta;
2949 VERIFIER_DEBUG ( printf ("boolean branch offset %d delta %d target %d\n", ctx->ip_offset, delta, target); );
2951 if (target < 0 || target >= ctx->code_size) {
2952 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Boolean branch target out of code at 0x%04x", ctx->ip_offset));
2956 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
2958 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
2961 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
2965 ctx->target = target;
2967 if (!check_underflow (ctx, 1))
2970 top = stack_pop (ctx);
2971 if (!is_valid_bool_arg (top))
2972 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Argument type %s not valid for brtrue/brfalse at 0x%04x", stack_slot_get_name (top), ctx->ip_offset));
2974 check_unmanaged_pointer (ctx, top);
2978 stack_slot_is_complex_type_not_reference_type (ILStackDesc *slot)
2980 return stack_slot_get_type (slot) == TYPE_COMPLEX && !MONO_TYPE_IS_REFERENCE (slot->type) && !stack_slot_is_boxed_value (slot);
2984 do_branch_op (VerifyContext *ctx, signed int delta, const unsigned char table [TYPE_MAX][TYPE_MAX])
2989 int target = ctx->ip_offset + delta;
2991 VERIFIER_DEBUG ( printf ("branch offset %d delta %d target %d\n", ctx->ip_offset, delta, target); );
2993 if (target < 0 || target >= ctx->code_size) {
2994 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target out of code at 0x%04x", ctx->ip_offset));
2998 switch (is_valid_cmp_branch_instruction (ctx->header, ctx->ip_offset, target)) {
2999 case 1: /*FIXME use constants and not magic numbers.*/
3000 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
3003 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
3007 ctx->target = target;
3009 if (!check_underflow (ctx, 2))
3012 b = stack_pop (ctx);
3013 a = stack_pop (ctx);
3015 idxa = stack_slot_get_underlying_type (a);
3016 if (stack_slot_is_managed_pointer (a))
3019 idxb = stack_slot_get_underlying_type (b);
3020 if (stack_slot_is_managed_pointer (b))
3023 if (stack_slot_is_complex_type_not_reference_type (a) || stack_slot_is_complex_type_not_reference_type (b)) {
3028 res = table [idxa][idxb];
3031 VERIFIER_DEBUG ( printf ("branch res %d\n", res); );
3032 VERIFIER_DEBUG ( printf ("idxa %d idxb %d\n", idxa, idxb); );
3034 if (res == TYPE_INV) {
3035 CODE_NOT_VERIFIABLE (ctx,
3036 g_strdup_printf ("Compare and Branch instruction applyed to ill formed stack (%s x %s) at 0x%04x", stack_slot_get_name (a), stack_slot_get_name (b), ctx->ip_offset));
3037 } else if (res & NON_VERIFIABLE_RESULT) {
3038 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Compare and Branch instruction is not verifiable (%s x %s) at 0x%04x", stack_slot_get_name (a), stack_slot_get_name (b), ctx->ip_offset));
3039 res = res & ~NON_VERIFIABLE_RESULT;
3044 do_cmp_op (VerifyContext *ctx, const unsigned char table [TYPE_MAX][TYPE_MAX], guint32 opcode)
3050 if (!check_underflow (ctx, 2))
3052 b = stack_pop (ctx);
3053 a = stack_pop (ctx);
3055 if (opcode == CEE_CGT_UN) {
3056 if (stack_slot_get_type (a) == TYPE_COMPLEX && stack_slot_get_type (b) == TYPE_COMPLEX) {
3057 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3062 idxa = stack_slot_get_underlying_type (a);
3063 if (stack_slot_is_managed_pointer (a))
3066 idxb = stack_slot_get_underlying_type (b);
3067 if (stack_slot_is_managed_pointer (b))
3070 if (stack_slot_is_complex_type_not_reference_type (a) || stack_slot_is_complex_type_not_reference_type (b)) {
3075 res = table [idxa][idxb];
3078 if(res == TYPE_INV) {
3079 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf("Compare instruction applyed to ill formed stack (%s x %s) at 0x%04x", stack_slot_get_name (a), stack_slot_get_name (b), ctx->ip_offset));
3080 } else if (res & NON_VERIFIABLE_RESULT) {
3081 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Compare instruction is not verifiable (%s x %s) at 0x%04x", stack_slot_get_name (a), stack_slot_get_name (b), ctx->ip_offset));
3082 res = res & ~NON_VERIFIABLE_RESULT;
3084 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3088 do_ret (VerifyContext *ctx)
3090 MonoType *ret = ctx->signature->ret;
3091 VERIFIER_DEBUG ( printf ("checking ret\n"); );
3092 if (ret->type != MONO_TYPE_VOID) {
3094 if (!check_underflow (ctx, 1))
3097 top = stack_pop(ctx);
3099 if (!verify_stack_type_compatibility (ctx, ctx->signature->ret, top)) {
3100 char *ret_type = mono_type_full_name (ctx->signature->ret);
3101 char *stack_type = stack_slot_full_name (top);
3102 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible return value on stack with method signature, expected '%s' but got '%s' at 0x%04x", ret_type, stack_type, ctx->ip_offset));
3103 g_free (stack_type);
3108 if (ret->byref || ret->type == MONO_TYPE_TYPEDBYREF || mono_type_is_value_type (ret, "System", "ArgIterator") || mono_type_is_value_type (ret, "System", "RuntimeArgumentHandle"))
3109 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method returns byref, TypedReference, ArgIterator or RuntimeArgumentHandle at 0x%04x", ctx->ip_offset));
3112 if (ctx->eval.size > 0) {
3113 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack not empty (%d) after ret at 0x%04x", ctx->eval.size, ctx->ip_offset));
3115 if (in_any_block (ctx->header, ctx->ip_offset))
3116 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ret cannot escape exception blocks at 0x%04x", ctx->ip_offset));
3120 * FIXME we need to fix the case of a non-virtual instance method defined in the parent but call using a token pointing to a subclass.
3121 * This is illegal but mono_get_method_full decoded it.
3122 * TODO handle calling .ctor outside one or calling the .ctor for other class but super
3125 do_invoke_method (VerifyContext *ctx, int method_token, gboolean virtual)
3128 MonoMethodSignature *sig;
3131 gboolean virt_check_this = FALSE;
3132 gboolean constrained = ctx->prefix_set & PREFIX_CONSTRAINED;
3134 if (!(method = verifier_load_method (ctx, method_token, virtual ? "callvirt" : "call")))
3138 CLEAR_PREFIX (ctx, PREFIX_CONSTRAINED);
3140 if (method->klass->valuetype) // && !constrained ???
3141 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use callvirtual with valuetype method at 0x%04x", ctx->ip_offset));
3143 if ((method->flags & METHOD_ATTRIBUTE_STATIC))
3144 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use callvirtual with static method at 0x%04x", ctx->ip_offset));
3147 if (method->flags & METHOD_ATTRIBUTE_ABSTRACT)
3148 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use call with an abstract method at 0x%04x", ctx->ip_offset));
3150 if ((method->flags & METHOD_ATTRIBUTE_VIRTUAL) && !(method->flags & METHOD_ATTRIBUTE_FINAL) && !(method->klass->flags & TYPE_ATTRIBUTE_SEALED)) {
3151 virt_check_this = TRUE;
3152 ctx->code [ctx->ip_offset].flags |= IL_CODE_CALL_NONFINAL_VIRTUAL;
3156 if (!(sig = mono_method_get_signature_full (method, ctx->image, method_token, ctx->generic_context)))
3157 sig = mono_method_get_signature (method, ctx->image, method_token);
3160 char *name = mono_type_get_full_name (method->klass);
3161 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Could not resolve signature of %s:%s at 0x%04x", name, method->name, ctx->ip_offset));
3166 param_count = sig->param_count + sig->hasthis;
3167 if (!check_underflow (ctx, param_count))
3170 for (i = sig->param_count - 1; i >= 0; --i) {
3171 VERIFIER_DEBUG ( printf ("verifying argument %d\n", i); );
3172 value = stack_pop (ctx);
3173 if (!verify_stack_type_compatibility (ctx, sig->params[i], value)) {
3174 char *stack_name = stack_slot_full_name (value);
3175 char *sig_name = mono_type_full_name (sig->params [i]);
3176 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible parameter with function signature: Calling method with signature (%s) but for argument %d there is a (%s) on stack at 0x%04x", sig_name, i, stack_name, ctx->ip_offset));
3177 g_free (stack_name);
3181 if (stack_slot_is_managed_mutability_pointer (value))
3182 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer as argument of %s at 0x%04x", virtual ? "callvirt" : "call", ctx->ip_offset));
3184 if ((ctx->prefix_set & PREFIX_TAIL) && stack_slot_is_managed_pointer (value)) {
3185 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot pass a byref argument to a tail %s at 0x%04x", virtual ? "callvirt" : "call", ctx->ip_offset));
3191 MonoType *type = &method->klass->byval_arg;
3194 if (mono_method_is_constructor (method) && !method->klass->valuetype) {
3195 if (IS_STRICT_MODE (ctx) && !mono_method_is_constructor (ctx->method))
3196 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot call a constructor outside one at 0x%04x", ctx->ip_offset));
3197 if (IS_STRICT_MODE (ctx) && method->klass != ctx->method->klass->parent && method->klass != ctx->method->klass)
3198 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot call a constructor of a type different from this or super at 0x%04x", ctx->ip_offset));
3200 ctx->super_ctor_called = TRUE;
3201 value = stack_pop_safe (ctx);
3202 if (IS_STRICT_MODE (ctx) && (value->stype & THIS_POINTER_MASK) != THIS_POINTER_MASK)
3203 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid 'this ptr' argument for constructor at 0x%04x", ctx->ip_offset));
3205 value = stack_pop (ctx);
3208 copy_stack_value (©, value);
3209 //TODO we should extract this to a 'drop_byref_argument' and use everywhere
3210 //Other parts of the code suffer from the same issue of
3211 copy.type = mono_type_get_type_byval (copy.type);
3212 copy.stype &= ~POINTER_MASK;
3214 if (virt_check_this && !stack_slot_is_this_pointer (value) && !(method->klass->valuetype || stack_slot_is_boxed_value (value)))
3215 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use the call opcode with a non-final virtual method on an object different than the 'this' pointer at 0x%04x", ctx->ip_offset));
3217 if (constrained && virtual) {
3218 if (!stack_slot_is_managed_pointer (value))
3219 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Object is not a managed pointer for a constrained call at 0x%04x", ctx->ip_offset));
3220 if (!mono_metadata_type_equal_full (mono_type_get_type_byval (value->type), mono_type_get_underlying_type (ctx->constrained_type), TRUE))
3221 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Object not compatible with constrained type at 0x%04x", ctx->ip_offset));
3222 copy.stype |= BOXED_MASK;
3223 copy.type = ctx->constrained_type;
3225 if (stack_slot_is_managed_pointer (value) && !mono_class_from_mono_type (value->type)->valuetype)
3226 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot call a reference type using a managed pointer to the this arg at 0x%04x", ctx->ip_offset));
3228 if (!virtual && mono_class_from_mono_type (value->type)->valuetype && !method->klass->valuetype && !stack_slot_is_boxed_value (value))
3229 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot call a valuetype baseclass at 0x%04x", ctx->ip_offset));
3231 if (virtual && mono_class_from_mono_type (value->type)->valuetype && !stack_slot_is_boxed_value (value))
3232 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a valuetype with callvirt at 0x%04x", ctx->ip_offset));
3234 if (method->klass->valuetype && (stack_slot_is_boxed_value (value) || !stack_slot_is_managed_pointer (value)))
3235 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a boxed or literal valuetype to call a valuetype method at 0x%04x", ctx->ip_offset));
3237 if (!verify_stack_type_compatibility (ctx, type, ©)) {
3238 char *expected = mono_type_full_name (type);
3239 char *effective = stack_slot_full_name (©);
3240 char *method_name = mono_method_full_name (method, TRUE);
3241 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible this argument on stack with method signature expected '%s' but got '%s' for a call to '%s' at 0x%04x",
3242 expected, effective, method_name, ctx->ip_offset));
3243 g_free (method_name);
3248 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, mono_class_from_mono_type (value->type))) {
3249 char *name = mono_method_full_name (method, TRUE);
3250 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Method %s is not accessible at 0x%04x", name, ctx->ip_offset), MONO_EXCEPTION_METHOD_ACCESS);
3254 } else if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, NULL)) {
3255 char *name = mono_method_full_name (method, TRUE);
3256 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Method %s is not accessible at 0x%04x", name, ctx->ip_offset), MONO_EXCEPTION_METHOD_ACCESS);
3260 if (sig->ret->type != MONO_TYPE_VOID) {
3261 if (!mono_type_is_valid_in_context (ctx, sig->ret))
3264 if (check_overflow (ctx)) {
3265 value = stack_push (ctx);
3266 set_stack_value (ctx, value, sig->ret, FALSE);
3267 if ((ctx->prefix_set & PREFIX_READONLY) && method->klass->rank && !strcmp (method->name, "Address")) {
3268 ctx->prefix_set &= ~PREFIX_READONLY;
3269 value->stype |= CMMP_MASK;
3274 if ((ctx->prefix_set & PREFIX_TAIL)) {
3275 if (!mono_delegate_ret_equal (mono_method_signature (ctx->method)->ret, sig->ret))
3276 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Tail call with incompatible return type at 0x%04x", ctx->ip_offset));
3277 if (ctx->header->code [ctx->ip_offset + 5] != CEE_RET)
3278 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Tail call not followed by ret at 0x%04x", ctx->ip_offset));
3284 do_push_static_field (VerifyContext *ctx, int token, gboolean take_addr)
3286 MonoClassField *field;
3288 if (!check_overflow (ctx))
3291 CLEAR_PREFIX (ctx, PREFIX_VOLATILE);
3293 if (!(field = verifier_load_field (ctx, token, &klass, take_addr ? "ldsflda" : "ldsfld")))
3296 if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC)) {
3297 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot load non static field at 0x%04x", ctx->ip_offset));
3300 /*taking the address of initonly field only works from the static constructor */
3301 if (take_addr && (field->type->attrs & FIELD_ATTRIBUTE_INIT_ONLY) &&
3302 !(field->parent == ctx->method->klass && (ctx->method->flags & (METHOD_ATTRIBUTE_SPECIAL_NAME | METHOD_ATTRIBUTE_STATIC)) && !strcmp (".cctor", ctx->method->name)))
3303 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a init-only field at 0x%04x", ctx->ip_offset));
3305 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3306 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3308 set_stack_value (ctx, stack_push (ctx), field->type, take_addr);
3312 do_store_static_field (VerifyContext *ctx, int token) {
3313 MonoClassField *field;
3316 CLEAR_PREFIX (ctx, PREFIX_VOLATILE);
3318 if (!check_underflow (ctx, 1))
3321 value = stack_pop (ctx);
3323 if (!(field = verifier_load_field (ctx, token, &klass, "stsfld")))
3326 if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC)) {
3327 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot store non static field at 0x%04x", ctx->ip_offset));
3331 if (field->type->type == MONO_TYPE_TYPEDBYREF) {
3332 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Typedbyref field is an unverfiable type in store static field at 0x%04x", ctx->ip_offset));
3336 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3337 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3339 if (!verify_stack_type_compatibility (ctx, field->type, value)) {
3340 char *stack_name = stack_slot_full_name (value);
3341 char *field_name = mono_type_full_name (field->type);
3342 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type in static field store expected '%s' but found '%s' at 0x%04x",
3343 field_name, stack_name, ctx->ip_offset));
3344 g_free (field_name);
3345 g_free (stack_name);
3350 check_is_valid_type_for_field_ops (VerifyContext *ctx, int token, ILStackDesc *obj, MonoClassField **ret_field, const char *opcode)
3352 MonoClassField *field;
3354 gboolean is_pointer;
3356 /*must be a reference type, a managed pointer, an unamanaged pointer, or a valuetype*/
3357 if (!(field = verifier_load_field (ctx, token, &klass, opcode)))
3361 //the value on stack is going to be used as a pointer
3362 is_pointer = stack_slot_get_type (obj) == TYPE_PTR || (stack_slot_get_type (obj) == TYPE_NATIVE_INT && !get_stack_type (&field->parent->byval_arg));
3364 if (field->type->type == MONO_TYPE_TYPEDBYREF) {
3365 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Typedbyref field is an unverfiable type at 0x%04x", ctx->ip_offset));
3368 g_assert (obj->type);
3370 /*The value on the stack must be a subclass of the defining type of the field*/
3371 /* we need to check if we can load the field from the stack value*/
3373 if (stack_slot_get_underlying_type (obj) == TYPE_NATIVE_INT)
3374 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Native int is not a verifiable type to reference a field at 0x%04x", ctx->ip_offset));
3376 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3377 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3379 if (!field->parent->valuetype && stack_slot_is_managed_pointer (obj))
3380 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type at stack is a managed pointer to a reference type and is not compatible to reference the field at 0x%04x", ctx->ip_offset));
3382 /*a value type can be loaded from a value or a managed pointer, but not a boxed object*/
3383 if (field->parent->valuetype && stack_slot_is_boxed_value (obj))
3384 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type at stack is a boxed valuetype and is not compatible to reference the field at 0x%04x", ctx->ip_offset));
3386 if (!stack_slot_is_null_literal (obj) && !verify_stack_type_compatibility_full (ctx, &field->parent->byval_arg, obj, TRUE, FALSE)) {
3387 char *found = stack_slot_full_name (obj);
3388 char *expected = mono_type_full_name (&field->parent->byval_arg);
3389 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Expected type '%s' but found '%s' referencing the 'this' argument at 0x%04x", expected, found, ctx->ip_offset));
3394 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, mono_class_from_mono_type (obj->type)))
3395 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3398 check_unmanaged_pointer (ctx, obj);
3403 do_push_field (VerifyContext *ctx, int token, gboolean take_addr)
3406 MonoClassField *field;
3409 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3411 if (!check_underflow (ctx, 1))
3413 obj = stack_pop_safe (ctx);
3415 if (!check_is_valid_type_for_field_ops (ctx, token, obj, &field, take_addr ? "ldflda" : "ldfld"))
3418 if (take_addr && field->parent->valuetype && !stack_slot_is_managed_pointer (obj))
3419 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a temporary value-type at 0x%04x", ctx->ip_offset));
3421 if (take_addr && (field->type->attrs & FIELD_ATTRIBUTE_INIT_ONLY) &&
3422 !(field->parent == ctx->method->klass && mono_method_is_constructor (ctx->method)))
3423 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a init-only field at 0x%04x", ctx->ip_offset));
3425 set_stack_value (ctx, stack_push (ctx), field->type, take_addr);
3429 do_store_field (VerifyContext *ctx, int token)
3431 ILStackDesc *value, *obj;
3432 MonoClassField *field;
3433 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3435 if (!check_underflow (ctx, 2))
3438 value = stack_pop (ctx);
3439 obj = stack_pop_safe (ctx);
3441 if (!check_is_valid_type_for_field_ops (ctx, token, obj, &field, "stfld"))
3444 if (!verify_stack_type_compatibility (ctx, field->type, value))
3445 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type %s in field store at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3448 /*TODO proper handle for Nullable<T>*/
3450 do_box_value (VerifyContext *ctx, int klass_token)
3453 MonoType *type = get_boxable_mono_type (ctx, klass_token, "box");
3459 if (!check_underflow (ctx, 1))
3462 value = stack_pop (ctx);
3463 /*box is a nop for reference types*/
3465 if (stack_slot_get_underlying_type (value) == TYPE_COMPLEX && MONO_TYPE_IS_REFERENCE (value->type) && MONO_TYPE_IS_REFERENCE (type)) {
3466 stack_push_stack_val (ctx, value)->stype |= BOXED_MASK;
3471 if (!verify_stack_type_compatibility (ctx, type, value))
3472 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for boxing operation at 0x%04x", ctx->ip_offset));
3474 klass = mono_class_from_mono_type (type);
3475 if (mono_class_is_nullable (klass))
3476 type = &mono_class_get_nullable_param (klass)->byval_arg;
3477 stack_push_val (ctx, TYPE_COMPLEX | BOXED_MASK, type);
3481 do_unbox_value (VerifyContext *ctx, int klass_token)
3484 MonoType *type = get_boxable_mono_type (ctx, klass_token, "unbox");
3489 if (!check_underflow (ctx, 1))
3492 if (!mono_class_from_mono_type (type)->valuetype)
3493 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid reference type for unbox at 0x%04x", ctx->ip_offset));
3495 value = stack_pop (ctx);
3497 /*Value should be: a boxed valuetype or a reference type*/
3498 if (!(stack_slot_get_type (value) == TYPE_COMPLEX &&
3499 (stack_slot_is_boxed_value (value) || !mono_class_from_mono_type (value->type)->valuetype)))
3500 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type %s at stack for unbox operation at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3502 set_stack_value (ctx, value = stack_push (ctx), mono_type_get_type_byref (type), FALSE);
3503 value->stype |= CMMP_MASK;
3507 do_unbox_any (VerifyContext *ctx, int klass_token)
3510 MonoType *type = get_boxable_mono_type (ctx, klass_token, "unbox.any");
3515 if (!check_underflow (ctx, 1))
3518 value = stack_pop (ctx);
3520 /*Value should be: a boxed valuetype or a reference type*/
3521 if (!(stack_slot_get_type (value) == TYPE_COMPLEX &&
3522 (stack_slot_is_boxed_value (value) || !mono_class_from_mono_type (value->type)->valuetype)))
3523 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type %s at stack for unbox.any operation at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3525 set_stack_value (ctx, stack_push (ctx), type, FALSE);
3529 do_unary_math_op (VerifyContext *ctx, int op)
3532 if (!check_underflow (ctx, 1))
3534 value = stack_pop (ctx);
3535 switch (stack_slot_get_type (value)) {
3538 case TYPE_NATIVE_INT:
3543 case TYPE_COMPLEX: /*only enums are ok*/
3544 if (mono_type_is_enum_type (value->type))
3547 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for unary not at 0x%04x", ctx->ip_offset));
3549 stack_push_stack_val (ctx, value);
3553 do_conversion (VerifyContext *ctx, int kind)
3556 if (!check_underflow (ctx, 1))
3558 value = stack_pop (ctx);
3560 switch (stack_slot_get_type (value)) {
3563 case TYPE_NATIVE_INT:
3567 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type (%s) at stack for conversion operation. Numeric type expected at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3572 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3575 stack_push_val (ctx,TYPE_I8, &mono_defaults.int64_class->byval_arg);
3578 stack_push_val (ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
3580 case TYPE_NATIVE_INT:
3581 stack_push_val (ctx, TYPE_NATIVE_INT, &mono_defaults.int_class->byval_arg);
3584 g_error ("unknown type %02x in conversion", kind);
3590 do_load_token (VerifyContext *ctx, int token)
3593 MonoClass *handle_class;
3594 if (!check_overflow (ctx))
3597 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
3598 handle = mono_method_get_wrapper_data (ctx->method, token);
3599 handle_class = mono_method_get_wrapper_data (ctx->method, token + 1);
3600 if (handle_class == mono_defaults.typehandle_class)
3601 handle = &((MonoClass*)handle)->byval_arg;
3603 switch (token & 0xff000000) {
3604 case MONO_TOKEN_TYPE_DEF:
3605 case MONO_TOKEN_TYPE_REF:
3606 case MONO_TOKEN_TYPE_SPEC:
3607 case MONO_TOKEN_FIELD_DEF:
3608 case MONO_TOKEN_METHOD_DEF:
3609 case MONO_TOKEN_METHOD_SPEC:
3610 case MONO_TOKEN_MEMBER_REF:
3611 if (!token_bounds_check (ctx->image, token)) {
3612 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Table index out of range 0x%x for token %x for ldtoken at 0x%04x", mono_metadata_token_index (token), token, ctx->ip_offset));
3617 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid table 0x%x for token 0x%x for ldtoken at 0x%04x", mono_metadata_token_table (token), token, ctx->ip_offset));
3621 handle = mono_ldtoken (ctx->image, token, &handle_class, ctx->generic_context);
3625 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid token 0x%x for ldtoken at 0x%04x", token, ctx->ip_offset));
3628 if (handle_class == mono_defaults.typehandle_class) {
3629 mono_type_is_valid_in_context (ctx, (MonoType*)handle);
3630 } else if (handle_class == mono_defaults.methodhandle_class) {
3631 mono_method_is_valid_in_context (ctx, (MonoMethod*)handle);
3632 } else if (handle_class == mono_defaults.fieldhandle_class) {
3633 mono_type_is_valid_in_context (ctx, &((MonoClassField*)handle)->parent->byval_arg);
3635 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid ldtoken type %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
3637 stack_push_val (ctx, TYPE_COMPLEX, mono_class_get_type (handle_class));
3641 do_ldobj_value (VerifyContext *ctx, int token)
3644 MonoType *type = get_boxable_mono_type (ctx, token, "ldobj");
3645 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3650 if (!check_underflow (ctx, 1))
3653 value = stack_pop (ctx);
3654 if (!stack_slot_is_managed_pointer (value)
3655 && stack_slot_get_type (value) != TYPE_NATIVE_INT
3656 && !(stack_slot_get_type (value) == TYPE_PTR && value->type->type != MONO_TYPE_FNPTR)) {
3657 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid argument %s to ldobj at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3661 if (stack_slot_get_type (value) == TYPE_NATIVE_INT)
3662 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Using native pointer to ldobj at 0x%04x", ctx->ip_offset));
3664 /*We have a byval on the stack, but the comparison must be strict. */
3665 if (!verify_type_compatibility_full (ctx, type, mono_type_get_type_byval (value->type), TRUE))
3666 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldojb operation at 0x%04x", ctx->ip_offset));
3668 set_stack_value (ctx, stack_push (ctx), type, FALSE);
3672 do_stobj (VerifyContext *ctx, int token)
3674 ILStackDesc *dest, *src;
3675 MonoType *type = get_boxable_mono_type (ctx, token, "stobj");
3676 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3681 if (!check_underflow (ctx, 2))
3684 src = stack_pop (ctx);
3685 dest = stack_pop (ctx);
3687 if (stack_slot_is_managed_mutability_pointer (dest))
3688 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with stobj at 0x%04x", ctx->ip_offset));
3690 if (!stack_slot_is_managed_pointer (dest))
3691 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid destination of stobj operation at 0x%04x", ctx->ip_offset));
3693 if (stack_slot_is_boxed_value (src) && !MONO_TYPE_IS_REFERENCE (src->type) && !MONO_TYPE_IS_REFERENCE (type))
3694 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use stobj with a boxed source value that is not a reference type at 0x%04x", ctx->ip_offset));
3696 if (!verify_stack_type_compatibility (ctx, type, src)) {
3697 char *type_name = mono_type_full_name (type);
3698 char *src_name = stack_slot_full_name (src);
3699 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Token '%s' and source '%s' of stobj don't match ' at 0x%04x", type_name, src_name, ctx->ip_offset));
3704 if (!verify_type_compatibility (ctx, mono_type_get_type_byval (dest->type), type))
3705 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Destination and token types of stobj don't match at 0x%04x", ctx->ip_offset));
3709 do_cpobj (VerifyContext *ctx, int token)
3711 ILStackDesc *dest, *src;
3712 MonoType *type = get_boxable_mono_type (ctx, token, "cpobj");
3716 if (!check_underflow (ctx, 2))
3719 src = stack_pop (ctx);
3720 dest = stack_pop (ctx);
3722 if (!stack_slot_is_managed_pointer (src))
3723 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid source of cpobj operation at 0x%04x", ctx->ip_offset));
3725 if (!stack_slot_is_managed_pointer (dest))
3726 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid destination of cpobj operation at 0x%04x", ctx->ip_offset));
3728 if (stack_slot_is_managed_mutability_pointer (dest))
3729 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with cpobj at 0x%04x", ctx->ip_offset));
3731 if (!verify_type_compatibility (ctx, type, mono_type_get_type_byval (src->type)))
3732 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Token and source types of cpobj don't match at 0x%04x", ctx->ip_offset));
3734 if (!verify_type_compatibility (ctx, mono_type_get_type_byval (dest->type), type))
3735 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Destination and token types of cpobj don't match at 0x%04x", ctx->ip_offset));
3739 do_initobj (VerifyContext *ctx, int token)
3742 MonoType *stack, *type = get_boxable_mono_type (ctx, token, "initobj");
3746 if (!check_underflow (ctx, 1))
3749 obj = stack_pop (ctx);
3751 if (!stack_slot_is_managed_pointer (obj))
3752 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid object address for initobj at 0x%04x", ctx->ip_offset));
3754 if (stack_slot_is_managed_mutability_pointer (obj))
3755 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with initobj at 0x%04x", ctx->ip_offset));
3757 stack = mono_type_get_type_byval (obj->type);
3758 if (MONO_TYPE_IS_REFERENCE (stack)) {
3759 if (!verify_type_compatibility (ctx, stack, type))
3760 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type token of initobj not compatible with value on stack at 0x%04x", ctx->ip_offset));
3761 else if (IS_STRICT_MODE (ctx) && !mono_metadata_type_equal (type, stack))
3762 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type token of initobj not compatible with value on stack at 0x%04x", ctx->ip_offset));
3763 } else if (!verify_type_compatibility (ctx, stack, type)) {
3764 char *expected_name = mono_type_full_name (type);
3765 char *stack_name = mono_type_full_name (stack);
3767 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Initobj %s not compatible with value on stack %s at 0x%04x", expected_name, stack_name, ctx->ip_offset));
3768 g_free (expected_name);
3769 g_free (stack_name);
3774 do_newobj (VerifyContext *ctx, int token)
3778 MonoMethodSignature *sig;
3780 gboolean is_delegate = FALSE;
3782 if (!(method = verifier_load_method (ctx, token, "newobj")))
3785 if (!mono_method_is_constructor (method)) {
3786 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method from token 0x%08x not a constructor at 0x%04x", token, ctx->ip_offset));
3790 if (method->klass->flags & (TYPE_ATTRIBUTE_ABSTRACT | TYPE_ATTRIBUTE_INTERFACE))
3791 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Trying to instantiate an abstract or interface type at 0x%04x", ctx->ip_offset));
3793 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, NULL)) {
3794 char *from = mono_method_full_name (ctx->method, TRUE);
3795 char *to = mono_method_full_name (method, TRUE);
3796 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Constructor %s not visible from %s at 0x%04x", to, from, ctx->ip_offset), MONO_EXCEPTION_METHOD_ACCESS);
3801 //FIXME use mono_method_get_signature_full
3802 sig = mono_method_signature (method);
3804 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid constructor signature to newobj at 0x%04x", ctx->ip_offset));
3808 if (!sig->hasthis) {
3809 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid constructor signature missing hasthis at 0x%04x", ctx->ip_offset));
3813 if (!check_underflow (ctx, sig->param_count))
3816 is_delegate = method->klass->parent == mono_defaults.multicastdelegate_class;
3819 ILStackDesc *funptr;
3820 //first arg is object, second arg is fun ptr
3821 if (sig->param_count != 2) {
3822 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid delegate constructor at 0x%04x", ctx->ip_offset));
3825 funptr = stack_pop (ctx);
3826 value = stack_pop (ctx);
3827 verify_delegate_compatibility (ctx, method->klass, value, funptr);
3829 for (i = sig->param_count - 1; i >= 0; --i) {
3830 VERIFIER_DEBUG ( printf ("verifying constructor argument %d\n", i); );
3831 value = stack_pop (ctx);
3832 if (!verify_stack_type_compatibility (ctx, sig->params [i], value)) {
3833 char *stack_name = stack_slot_full_name (value);
3834 char *sig_name = mono_type_full_name (sig->params [i]);
3835 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible parameter value with constructor signature: %s X %s at 0x%04x", sig_name, stack_name, ctx->ip_offset));
3836 g_free (stack_name);
3840 if (stack_slot_is_managed_mutability_pointer (value))
3841 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer as argument of newobj at 0x%04x", ctx->ip_offset));
3845 if (check_overflow (ctx))
3846 set_stack_value (ctx, stack_push (ctx), &method->klass->byval_arg, FALSE);
3850 do_cast (VerifyContext *ctx, int token, const char *opcode) {
3856 if (!check_underflow (ctx, 1))
3859 if (!(type = get_boxable_mono_type (ctx, token, opcode)))
3863 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid %s type at 0x%04x", opcode, ctx->ip_offset));
3867 value = stack_pop (ctx);
3868 is_boxed = stack_slot_is_boxed_value (value);
3870 if (stack_slot_is_managed_pointer (value))
3871 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value for %s at 0x%04x", opcode, ctx->ip_offset));
3872 else if (!MONO_TYPE_IS_REFERENCE (value->type) && !is_boxed) {
3873 char *name = stack_slot_full_name (value);
3874 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Expected a reference type on stack for %s but found %s at 0x%04x", opcode, name, ctx->ip_offset));
3878 switch (value->type->type) {
3879 case MONO_TYPE_FNPTR:
3881 case MONO_TYPE_TYPEDBYREF:
3882 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value for %s at 0x%04x", opcode, ctx->ip_offset));
3885 do_box = is_boxed || mono_type_is_generic_argument(type) || mono_class_from_mono_type (type)->valuetype;
3886 stack_push_val (ctx, TYPE_COMPLEX | (do_box ? BOXED_MASK : 0), type);
3890 mono_type_from_opcode (int opcode) {
3898 return &mono_defaults.sbyte_class->byval_arg;
3906 return &mono_defaults.int16_class->byval_arg;
3914 return &mono_defaults.int32_class->byval_arg;
3920 return &mono_defaults.int64_class->byval_arg;
3926 return &mono_defaults.single_class->byval_arg;
3932 return &mono_defaults.double_class->byval_arg;
3938 return &mono_defaults.int_class->byval_arg;
3942 case CEE_LDELEM_REF:
3943 case CEE_STELEM_REF:
3944 return &mono_defaults.object_class->byval_arg;
3947 g_error ("unknown opcode %02x in mono_type_from_opcode ", opcode);
3953 do_load_indirect (VerifyContext *ctx, int opcode)
3956 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3958 if (!check_underflow (ctx, 1))
3961 value = stack_pop (ctx);
3962 if (!stack_slot_is_managed_pointer (value)) {
3963 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Load indirect not using a manager pointer at 0x%04x", ctx->ip_offset));
3964 set_stack_value (ctx, stack_push (ctx), mono_type_from_opcode (opcode), FALSE);
3968 if (opcode == CEE_LDIND_REF) {
3969 if (stack_slot_get_underlying_type (value) != TYPE_COMPLEX || mono_class_from_mono_type (value->type)->valuetype)
3970 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldind_ref expected object byref operation at 0x%04x", ctx->ip_offset));
3971 set_stack_value (ctx, stack_push (ctx), mono_type_get_type_byval (value->type), FALSE);
3973 if (!verify_type_compatibility_full (ctx, mono_type_from_opcode (opcode), mono_type_get_type_byval (value->type), TRUE))
3974 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
3975 set_stack_value (ctx, stack_push (ctx), mono_type_from_opcode (opcode), FALSE);
3980 do_store_indirect (VerifyContext *ctx, int opcode)
3982 ILStackDesc *addr, *val;
3983 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3985 if (!check_underflow (ctx, 2))
3988 val = stack_pop (ctx);
3989 addr = stack_pop (ctx);
3991 check_unmanaged_pointer (ctx, addr);
3993 if (!stack_slot_is_managed_pointer (addr) && stack_slot_get_type (addr) != TYPE_PTR) {
3994 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid non-pointer argument to stind at 0x%04x", ctx->ip_offset));
3998 if (stack_slot_is_managed_mutability_pointer (addr)) {
3999 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with stind at 0x%04x", ctx->ip_offset));
4003 if (!verify_type_compatibility_full (ctx, mono_type_from_opcode (opcode), mono_type_get_type_byval (addr->type), TRUE))
4004 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid addr type at stack for stind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
4006 if (!verify_stack_type_compatibility (ctx, mono_type_from_opcode (opcode), val))
4007 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value type at stack for stind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
4011 do_newarr (VerifyContext *ctx, int token)
4014 MonoType *type = get_boxable_mono_type (ctx, token, "newarr");
4019 if (!check_underflow (ctx, 1))
4022 value = stack_pop (ctx);
4023 if (stack_slot_get_type (value) != TYPE_I4 && stack_slot_get_type (value) != TYPE_NATIVE_INT)
4024 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Array size type on stack (%s) is not a verifiable type at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
4026 set_stack_value (ctx, stack_push (ctx), mono_class_get_type (mono_array_class_get (mono_class_from_mono_type (type), 1)), FALSE);
4029 /*FIXME handle arrays that are not 0-indexed*/
4031 do_ldlen (VerifyContext *ctx)
4035 if (!check_underflow (ctx, 1))
4038 value = stack_pop (ctx);
4040 if (stack_slot_get_type (value) != TYPE_COMPLEX || value->type->type != MONO_TYPE_SZARRAY)
4041 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type for ldlen at 0x%04x", ctx->ip_offset));
4043 stack_push_val (ctx, TYPE_NATIVE_INT, &mono_defaults.int_class->byval_arg);
4046 /*FIXME handle arrays that are not 0-indexed*/
4047 /*FIXME handle readonly prefix and CMMP*/
4049 do_ldelema (VerifyContext *ctx, int klass_token)
4051 ILStackDesc *index, *array, *res;
4052 MonoType *type = get_boxable_mono_type (ctx, klass_token, "ldelema");
4058 if (!check_underflow (ctx, 2))
4061 index = stack_pop (ctx);
4062 array = stack_pop (ctx);
4064 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4065 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Index type(%s) for ldelema is not an int or a native int at 0x%04x", stack_slot_get_name (index), ctx->ip_offset));
4067 if (!stack_slot_is_null_literal (array)) {
4068 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY)
4069 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type(%s) for ldelema at 0x%04x", stack_slot_get_name (array), ctx->ip_offset));
4071 if (get_stack_type (type) == TYPE_I4 || get_stack_type (type) == TYPE_NATIVE_INT) {
4072 valid = verify_type_compatibility_full (ctx, type, &array->type->data.klass->byval_arg, TRUE);
4074 valid = mono_metadata_type_equal (type, &array->type->data.klass->byval_arg);
4077 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelema at 0x%04x", ctx->ip_offset));
4081 res = stack_push (ctx);
4082 set_stack_value (ctx, res, type, TRUE);
4083 if (ctx->prefix_set & PREFIX_READONLY) {
4084 ctx->prefix_set &= ~PREFIX_READONLY;
4085 res->stype |= CMMP_MASK;
4090 * FIXME handle arrays that are not 0-indexed
4091 * FIXME handle readonly prefix and CMMP
4094 do_ldelem (VerifyContext *ctx, int opcode, int token)
4096 #define IS_ONE_OF2(T, A, B) (T == A || T == B)
4097 ILStackDesc *index, *array;
4099 if (!check_underflow (ctx, 2))
4102 if (opcode == CEE_LDELEM) {
4103 if (!(type = verifier_load_type (ctx, token, "ldelem.any"))) {
4104 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Type (0x%08x) not found at 0x%04x", token, ctx->ip_offset));
4108 type = mono_type_from_opcode (opcode);
4111 index = stack_pop (ctx);
4112 array = stack_pop (ctx);
4114 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4115 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Index type(%s) for ldelem.X is not an int or a native int at 0x%04x", stack_slot_get_name (index), ctx->ip_offset));
4117 if (!stack_slot_is_null_literal (array)) {
4118 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY)
4119 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type(%s) for ldelem.X at 0x%04x", stack_slot_get_name (array), ctx->ip_offset));
4121 if (opcode == CEE_LDELEM_REF) {
4122 if (array->type->data.klass->valuetype)
4123 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type is not a reference type for ldelem.ref 0x%04x", ctx->ip_offset));
4124 type = &array->type->data.klass->byval_arg;
4126 MonoType *candidate = &array->type->data.klass->byval_arg;
4127 if (IS_STRICT_MODE (ctx)) {
4128 MonoType *underlying_type = mono_type_get_underlying_type_any (type);
4129 MonoType *underlying_candidate = mono_type_get_underlying_type_any (candidate);
4130 if ((IS_ONE_OF2 (underlying_type->type, MONO_TYPE_I4, MONO_TYPE_U4) && IS_ONE_OF2 (underlying_candidate->type, MONO_TYPE_I, MONO_TYPE_U)) ||
4131 (IS_ONE_OF2 (underlying_candidate->type, MONO_TYPE_I4, MONO_TYPE_U4) && IS_ONE_OF2 (underlying_type->type, MONO_TYPE_I, MONO_TYPE_U)))
4132 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelem.X at 0x%04x", ctx->ip_offset));
4134 if (!verify_type_compatibility_full (ctx, type, candidate, TRUE))
4135 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelem.X at 0x%04x", ctx->ip_offset));
4140 set_stack_value (ctx, stack_push (ctx), type, FALSE);
4145 * FIXME handle arrays that are not 0-indexed
4148 do_stelem (VerifyContext *ctx, int opcode, int token)
4150 ILStackDesc *index, *array, *value;
4152 if (!check_underflow (ctx, 3))
4155 if (opcode == CEE_STELEM) {
4156 if (!(type = verifier_load_type (ctx, token, "stelem.any"))) {
4157 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Type (0x%08x) not found at 0x%04x", token, ctx->ip_offset));
4161 type = mono_type_from_opcode (opcode);
4164 value = stack_pop (ctx);
4165 index = stack_pop (ctx);
4166 array = stack_pop (ctx);
4168 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4169 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Index type(%s) for stdelem.X is not an int or a native int at 0x%04x", stack_slot_get_name (index), ctx->ip_offset));
4171 if (!stack_slot_is_null_literal (array)) {
4172 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY) {
4173 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type(%s) for stelem.X at 0x%04x", stack_slot_get_name (array), ctx->ip_offset));
4175 if (opcode == CEE_STELEM_REF) {
4176 if (array->type->data.klass->valuetype)
4177 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type is not a reference type for stelem.ref 0x%04x", ctx->ip_offset));
4178 } else if (!verify_type_compatibility_full (ctx, &array->type->data.klass->byval_arg, type, TRUE)) {
4179 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for stdelem.X at 0x%04x", ctx->ip_offset));
4183 if (opcode == CEE_STELEM_REF) {
4184 if (!stack_slot_is_boxed_value (value) && mono_class_from_mono_type (value->type)->valuetype)
4185 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value is not a reference type for stelem.ref 0x%04x", ctx->ip_offset));
4186 } else if (opcode != CEE_STELEM_REF) {
4187 if (!verify_stack_type_compatibility (ctx, type, value))
4188 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value on stack for stdelem.X at 0x%04x", ctx->ip_offset));
4190 if (stack_slot_is_boxed_value (value) && !MONO_TYPE_IS_REFERENCE (value->type) && !MONO_TYPE_IS_REFERENCE (type))
4191 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use stobj with a boxed source value that is not a reference type at 0x%04x", ctx->ip_offset));
4197 do_throw (VerifyContext *ctx)
4199 ILStackDesc *exception;
4200 if (!check_underflow (ctx, 1))
4202 exception = stack_pop (ctx);
4204 if (!stack_slot_is_null_literal (exception) && !(stack_slot_get_type (exception) == TYPE_COMPLEX && !mono_class_from_mono_type (exception->type)->valuetype))
4205 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type on stack for throw, expected reference type at 0x%04x", ctx->ip_offset));
4207 if (mono_type_is_generic_argument (exception->type) && !stack_slot_is_boxed_value (exception)) {
4208 char *name = mono_type_full_name (exception->type);
4209 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type on stack for throw, expected reference type but found unboxed %s at 0x%04x ", name, ctx->ip_offset));
4212 /*The stack is left empty after a throw*/
4218 do_endfilter (VerifyContext *ctx)
4220 MonoExceptionClause *clause;
4222 if (IS_STRICT_MODE (ctx)) {
4223 if (ctx->eval.size != 1)
4224 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack size must have one item for endfilter at 0x%04x", ctx->ip_offset));
4226 if (ctx->eval.size >= 1 && stack_slot_get_type (stack_pop (ctx)) != TYPE_I4)
4227 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack item type is not an int32 for endfilter at 0x%04x", ctx->ip_offset));
4230 if ((clause = is_correct_endfilter (ctx, ctx->ip_offset))) {
4231 if (IS_STRICT_MODE (ctx)) {
4232 if (ctx->ip_offset != clause->handler_offset - 2)
4233 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter is not the last instruction of the filter clause at 0x%04x", ctx->ip_offset));
4235 if ((ctx->ip_offset != clause->handler_offset - 2) && !MONO_OFFSET_IN_HANDLER (clause, ctx->ip_offset))
4236 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter is not the last instruction of the filter clause at 0x%04x", ctx->ip_offset));
4239 if (IS_STRICT_MODE (ctx) && !is_unverifiable_endfilter (ctx, ctx->ip_offset))
4240 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter outside filter clause at 0x%04x", ctx->ip_offset));
4242 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("endfilter outside filter clause at 0x%04x", ctx->ip_offset));
4249 do_leave (VerifyContext *ctx, int delta)
4251 int target = ((gint32)ctx->ip_offset) + delta;
4252 if (target >= ctx->code_size || target < 0)
4253 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target out of code at 0x%04x", ctx->ip_offset));
4255 if (!is_correct_leave (ctx->header, ctx->ip_offset, target))
4256 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Leave not allowed in finally block at 0x%04x", ctx->ip_offset));
4258 ctx->target = target;
4264 * Verify br and br.s opcodes.
4267 do_static_branch (VerifyContext *ctx, int delta)
4269 int target = ctx->ip_offset + delta;
4270 if (target < 0 || target >= ctx->code_size) {
4271 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("branch target out of code at 0x%04x", ctx->ip_offset));
4275 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
4277 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
4280 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
4284 ctx->target = target;
4288 do_switch (VerifyContext *ctx, int count, const unsigned char *data)
4290 int i, base = ctx->ip_offset + 5 + count * 4;
4293 if (!check_underflow (ctx, 1))
4296 value = stack_pop (ctx);
4298 if (stack_slot_get_type (value) != TYPE_I4 && stack_slot_get_type (value) != TYPE_NATIVE_INT)
4299 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid argument to switch at 0x%04x", ctx->ip_offset));
4301 for (i = 0; i < count; ++i) {
4302 int target = base + read32 (data + i * 4);
4304 if (target < 0 || target >= ctx->code_size) {
4305 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Switch target %x out of code at 0x%04x", i, ctx->ip_offset));
4309 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
4311 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Switch target %x escapes out of exception block at 0x%04x", i, ctx->ip_offset));
4314 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Switch target %x escapes out of exception block at 0x%04x", i, ctx->ip_offset));
4317 merge_stacks (ctx, &ctx->eval, &ctx->code [target], FALSE, TRUE);
4322 do_load_function_ptr (VerifyContext *ctx, guint32 token, gboolean virtual)
4327 if (virtual && !check_underflow (ctx, 1))
4330 if (!virtual && !check_overflow (ctx))
4333 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
4334 method = mono_method_get_wrapper_data (ctx->method, (guint32)token);
4336 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid token %x for ldftn at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4340 if (!IS_METHOD_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
4341 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid token %x for ldftn at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4345 if (!(method = verifier_load_method (ctx, token, virtual ? "ldvirtfrn" : "ldftn")))
4349 if (mono_method_is_constructor (method))
4350 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use ldftn with a constructor at 0x%04x", ctx->ip_offset));
4353 ILStackDesc *top = stack_pop (ctx);
4355 if (stack_slot_get_type (top) != TYPE_COMPLEX || top->type->type == MONO_TYPE_VALUETYPE)
4356 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid argument to ldvirtftn at 0x%04x", ctx->ip_offset));
4358 if (method->flags & METHOD_ATTRIBUTE_STATIC)
4359 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use ldvirtftn with a constructor at 0x%04x", ctx->ip_offset));
4361 if (!verify_stack_type_compatibility (ctx, &method->klass->byval_arg, top))
4362 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unexpected object for ldvirtftn at 0x%04x", ctx->ip_offset));
4365 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, NULL))
4366 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Loaded method is not visible for ldftn/ldvirtftn at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_METHOD_ACCESS);
4368 top = stack_push_val(ctx, TYPE_PTR, mono_type_create_fnptr_from_mono_method (ctx, method));
4369 top->method = method;
4373 do_sizeof (VerifyContext *ctx, int token)
4377 if (!(type = verifier_load_type (ctx, token, "sizeof")))
4380 if (type->byref && type->type != MONO_TYPE_TYPEDBYREF) {
4381 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of byref type at 0x%04x", ctx->ip_offset));
4385 if (type->type == MONO_TYPE_VOID) {
4386 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of void type at 0x%04x", ctx->ip_offset));
4390 if (check_overflow (ctx))
4391 set_stack_value (ctx, stack_push (ctx), &mono_defaults.uint32_class->byval_arg, FALSE);
4394 /* Stack top can be of any type, the runtime doesn't care and treat everything as an int. */
4396 do_localloc (VerifyContext *ctx)
4400 if (ctx->eval.size != 1) {
4401 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack must have only size item in localloc at 0x%04x", ctx->ip_offset));
4405 if (in_any_exception_block (ctx->header, ctx->ip_offset)) {
4406 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack must have only size item in localloc at 0x%04x", ctx->ip_offset));
4410 /*TODO verify top type*/
4411 top = stack_pop (ctx);
4413 set_stack_value (ctx, stack_push (ctx), &mono_defaults.int_class->byval_arg, FALSE);
4414 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Instruction localloc in never verifiable at 0x%04x", ctx->ip_offset));
4418 do_ldstr (VerifyContext *ctx, guint32 token)
4420 GSList *error = NULL;
4421 if (ctx->method->wrapper_type == MONO_WRAPPER_NONE && !image_is_dynamic (ctx->image)) {
4422 if (mono_metadata_token_code (token) != MONO_TOKEN_STRING) {
4423 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid string token %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4427 if (!mono_verifier_verify_string_signature (ctx->image, mono_metadata_token_index (token), &error)) {
4429 ctx->list = g_slist_concat (ctx->list, error);
4430 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid string index %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4435 if (check_overflow (ctx))
4436 stack_push_val (ctx, TYPE_COMPLEX, &mono_defaults.string_class->byval_arg);
4440 do_refanyval (VerifyContext *ctx, int token)
4444 if (!check_underflow (ctx, 1))
4447 if (!(type = get_boxable_mono_type (ctx, token, "refanyval")))
4450 top = stack_pop (ctx);
4452 if (top->stype != TYPE_PTR || top->type->type != MONO_TYPE_TYPEDBYREF)
4453 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Expected a typedref as argument for refanyval, but found %s at 0x%04x", stack_slot_get_name (top), ctx->ip_offset));
4455 set_stack_value (ctx, stack_push (ctx), type, TRUE);
4459 do_refanytype (VerifyContext *ctx)
4463 if (!check_underflow (ctx, 1))
4466 top = stack_pop (ctx);
4468 if (top->stype != TYPE_PTR || top->type->type != MONO_TYPE_TYPEDBYREF)
4469 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Expected a typedref as argument for refanytype, but found %s at 0x%04x", stack_slot_get_name (top), ctx->ip_offset));
4471 set_stack_value (ctx, stack_push (ctx), &mono_defaults.typehandle_class->byval_arg, FALSE);
4476 do_mkrefany (VerifyContext *ctx, int token)
4480 if (!check_underflow (ctx, 1))
4483 if (!(type = get_boxable_mono_type (ctx, token, "refanyval")))
4486 top = stack_pop (ctx);
4488 if (stack_slot_is_managed_mutability_pointer (top))
4489 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with mkrefany at 0x%04x", ctx->ip_offset));
4491 if (!stack_slot_is_managed_pointer (top)) {
4492 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Expected a managed pointer for mkrefany, but found %s at 0x%04x", stack_slot_get_name (top), ctx->ip_offset));
4494 MonoType *stack_type = mono_type_get_type_byval (top->type);
4495 if (MONO_TYPE_IS_REFERENCE (type) && !mono_metadata_type_equal (type, stack_type))
4496 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type not compatible for mkrefany at 0x%04x", ctx->ip_offset));
4498 if (!MONO_TYPE_IS_REFERENCE (type) && !verify_type_compatibility_full (ctx, type, stack_type, TRUE))
4499 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type not compatible for mkrefany at 0x%04x", ctx->ip_offset));
4502 set_stack_value (ctx, stack_push (ctx), &mono_defaults.typed_reference_class->byval_arg, FALSE);
4506 do_ckfinite (VerifyContext *ctx)
4509 if (!check_underflow (ctx, 1))
4512 top = stack_pop (ctx);
4514 if (stack_slot_get_underlying_type (top) != TYPE_R8)
4515 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Expected float32 or float64 on stack for ckfinit but found %s at 0x%04x", stack_slot_get_name (top), ctx->ip_offset));
4516 stack_push_stack_val (ctx, top);
4520 * Merge the stacks and perform compat checks. The merge check if types of @from are mergeable with type of @to
4522 * @from holds new values for a given control path
4523 * @to holds the current values of a given control path
4525 * TODO we can eliminate the from argument as all callers pass &ctx->eval
4528 merge_stacks (VerifyContext *ctx, ILCodeDesc *from, ILCodeDesc *to, gboolean start, gboolean external)
4532 stack_init (ctx, to);
4535 if (to->flags == IL_CODE_FLAG_NOT_PROCESSED)
4538 stack_copy (&ctx->eval, to);
4540 } else if (!(to->flags & IL_CODE_STACK_MERGED)) {
4541 stack_copy (to, &ctx->eval);
4544 VERIFIER_DEBUG ( printf ("performing stack merge %d x %d\n", from->size, to->size); );
4546 if (from->size != to->size) {
4547 VERIFIER_DEBUG ( printf ("different stack sizes %d x %d at 0x%04x\n", from->size, to->size, ctx->ip_offset); );
4548 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Could not merge stacks, different sizes (%d x %d) at 0x%04x", from->size, to->size, ctx->ip_offset));
4552 //FIXME we need to preserve CMMP attributes
4553 //FIXME we must take null literals into consideration.
4554 for (i = 0; i < from->size; ++i) {
4555 ILStackDesc *new_slot = from->stack + i;
4556 ILStackDesc *old_slot = to->stack + i;
4557 MonoType *new_type = mono_type_from_stack_slot (new_slot);
4558 MonoType *old_type = mono_type_from_stack_slot (old_slot);
4559 MonoClass *old_class = mono_class_from_mono_type (old_type);
4560 MonoClass *new_class = mono_class_from_mono_type (new_type);
4561 MonoClass *match_class = NULL;
4563 // S := T then U = S (new value is compatible with current value, keep current)
4564 if (verify_stack_type_compatibility (ctx, old_type, new_slot)) {
4565 copy_stack_value (new_slot, old_slot);
4569 // T := S then U = T (old value is compatible with current value, use new)
4570 if (verify_stack_type_compatibility (ctx, new_type, old_slot)) {
4571 copy_stack_value (old_slot, new_slot);
4575 /*Both slots are the same boxed valuetype. Simply copy it.*/
4576 if (stack_slot_is_boxed_value (old_slot) &&
4577 stack_slot_is_boxed_value (new_slot) &&
4578 mono_metadata_type_equal (old_type, new_type)) {
4579 copy_stack_value (new_slot, old_slot);
4583 if (mono_type_is_generic_argument (old_type) || mono_type_is_generic_argument (new_type)) {
4584 char *old_name = stack_slot_full_name (old_slot);
4585 char *new_name = stack_slot_full_name (new_slot);
4586 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Could not merge stack at depth %d, types not compatible: %s X %s at 0x%04x", i, old_name, new_name, ctx->ip_offset));
4592 //both are reference types, use closest common super type
4593 if (!mono_class_from_mono_type (old_type)->valuetype
4594 && !mono_class_from_mono_type (new_type)->valuetype
4595 && !stack_slot_is_managed_pointer (old_slot)
4596 && !stack_slot_is_managed_pointer (new_slot)) {
4598 mono_class_setup_supertypes (old_class);
4599 mono_class_setup_supertypes (new_class);
4601 for (j = MIN (old_class->idepth, new_class->idepth) - 1; j > 0; --j) {
4602 if (mono_metadata_type_equal (&old_class->supertypes [j]->byval_arg, &new_class->supertypes [j]->byval_arg)) {
4603 match_class = old_class->supertypes [j];
4608 mono_class_setup_interfaces (old_class, &error);
4609 if (!mono_error_ok (&error)) {
4610 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot merge stacks due to a TypeLoadException %s at 0x%04x", mono_error_get_message (&error), ctx->ip_offset));
4611 mono_error_cleanup (&error);
4614 mono_class_setup_interfaces (new_class, &error);
4615 if (!mono_error_ok (&error)) {
4616 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot merge stacks due to a TypeLoadException %s at 0x%04x", mono_error_get_message (&error), ctx->ip_offset));
4617 mono_error_cleanup (&error);
4621 /* if old class is an interface that new class implements */
4622 if (old_class->flags & TYPE_ATTRIBUTE_INTERFACE) {
4623 if (verifier_class_is_assignable_from (old_class, new_class)) {
4624 match_class = old_class;
4627 for (j = 0; j < old_class->interface_count; ++j) {
4628 if (verifier_class_is_assignable_from (old_class->interfaces [j], new_class)) {
4629 match_class = old_class->interfaces [j];
4635 if (new_class->flags & TYPE_ATTRIBUTE_INTERFACE) {
4636 if (verifier_class_is_assignable_from (new_class, old_class)) {
4637 match_class = new_class;
4640 for (j = 0; j < new_class->interface_count; ++j) {
4641 if (verifier_class_is_assignable_from (new_class->interfaces [j], old_class)) {
4642 match_class = new_class->interfaces [j];
4648 //No decent super type found, use object
4649 match_class = mono_defaults.object_class;
4651 } else if (is_compatible_boxed_valuetype (ctx,old_type, new_type, new_slot, FALSE) || is_compatible_boxed_valuetype (ctx, new_type, old_type, old_slot, FALSE)) {
4652 match_class = mono_defaults.object_class;
4657 char *old_name = stack_slot_full_name (old_slot);
4658 char *new_name = stack_slot_full_name (new_slot);
4659 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Could not merge stack at depth %d, types not compatible: %s X %s at 0x%04x", i, old_name, new_name, ctx->ip_offset));
4663 set_stack_value (ctx, old_slot, &new_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4667 g_assert (match_class);
4668 set_stack_value (ctx, old_slot, &match_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4669 set_stack_value (ctx, new_slot, &match_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4675 to->flags |= IL_CODE_FLAG_WAS_TARGET;
4676 to->flags |= IL_CODE_STACK_MERGED;
4679 #define HANDLER_START(clause) ((clause)->flags == MONO_EXCEPTION_CLAUSE_FILTER ? (clause)->data.filter_offset : clause->handler_offset)
4680 #define IS_CATCH_OR_FILTER(clause) ((clause)->flags == MONO_EXCEPTION_CLAUSE_FILTER || (clause)->flags == MONO_EXCEPTION_CLAUSE_NONE)
4683 * is_clause_in_range :
4685 * Returns TRUE if either the protected block or the handler of @clause is in the @start - @end range.
4688 is_clause_in_range (MonoExceptionClause *clause, guint32 start, guint32 end)
4690 if (clause->try_offset >= start && clause->try_offset < end)
4692 if (HANDLER_START (clause) >= start && HANDLER_START (clause) < end)
4698 * is_clause_inside_range :
4700 * Returns TRUE if @clause lies completely inside the @start - @end range.
4703 is_clause_inside_range (MonoExceptionClause *clause, guint32 start, guint32 end)
4705 if (clause->try_offset < start || (clause->try_offset + clause->try_len) > end)
4707 if (HANDLER_START (clause) < start || (clause->handler_offset + clause->handler_len) > end)
4713 * is_clause_nested :
4715 * Returns TRUE if @nested is nested in @clause.
4718 is_clause_nested (MonoExceptionClause *clause, MonoExceptionClause *nested)
4720 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER && is_clause_inside_range (nested, clause->data.filter_offset, clause->handler_offset))
4722 return is_clause_inside_range (nested, clause->try_offset, clause->try_offset + clause->try_len) ||
4723 is_clause_inside_range (nested, clause->handler_offset, clause->handler_offset + clause->handler_len);
4726 /* Test the relationship between 2 exception clauses. Follow P.1 12.4.2.7 of ECMA
4727 * the each pair of exception must have the following properties:
4728 * - one is fully nested on another (the outer must not be a filter clause) (the nested one must come earlier)
4729 * - completely disjoin (none of the 3 regions of each entry overlap with the other 3)
4730 * - mutual protection (protected block is EXACT the same, handlers are disjoin and all handler are catch or all handler are filter)
4733 verify_clause_relationship (VerifyContext *ctx, MonoExceptionClause *clause, MonoExceptionClause *to_test)
4735 /*clause is nested*/
4736 if (to_test->flags == MONO_EXCEPTION_CLAUSE_FILTER && is_clause_inside_range (clause, to_test->data.filter_offset, to_test->handler_offset)) {
4737 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clause inside filter"));
4741 /*wrong nesting order.*/
4742 if (is_clause_nested (clause, to_test)) {
4743 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Nested exception clause appears after enclosing clause"));
4747 /*mutual protection*/
4748 if (clause->try_offset == to_test->try_offset && clause->try_len == to_test->try_len) {
4749 /*handlers are not disjoint*/
4750 if (is_clause_in_range (to_test, HANDLER_START (clause), clause->handler_offset + clause->handler_len)) {
4751 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception handlers overlap"));
4754 /* handlers are not catch or filter */
4755 if (!IS_CATCH_OR_FILTER (clause) || !IS_CATCH_OR_FILTER (to_test)) {
4756 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clauses with shared protected block are neither catch or filter"));
4763 /*not completelly disjoint*/
4764 if ((is_clause_in_range (to_test, clause->try_offset, clause->try_offset + clause->try_len) ||
4765 is_clause_in_range (to_test, HANDLER_START (clause), clause->handler_offset + clause->handler_len)) && !is_clause_nested (to_test, clause))
4766 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clauses overlap"));
4769 #define code_bounds_check(size) \
4770 if (ADDP_IS_GREATER_OR_OVF (ip, size, end)) {\
4771 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Code overrun starting with 0x%x at 0x%04x", *ip, ctx.ip_offset)); \
4776 mono_opcode_is_prefix (int op)
4779 case MONO_CEE_UNALIGNED_:
4780 case MONO_CEE_VOLATILE_:
4781 case MONO_CEE_TAIL_:
4782 case MONO_CEE_CONSTRAINED_:
4783 case MONO_CEE_READONLY_:
4790 * FIXME: need to distinguish between valid and verifiable.
4791 * Need to keep track of types on the stack.
4792 * Verify types for opcodes.
4795 mono_method_verify (MonoMethod *method, int level)
4798 const unsigned char *ip, *code_start;
4799 const unsigned char *end;
4800 MonoSimpleBasicBlock *bb = NULL, *original_bb = NULL;
4802 int i, n, need_merge = 0, start = 0;
4803 guint token, ip_offset = 0, prefix = 0;
4804 MonoGenericContext *generic_context = NULL;
4808 VERIFIER_DEBUG ( printf ("Verify IL for method %s %s %s\n", method->klass->name_space, method->klass->name, method->name); );
4810 init_verifier_stats ();
4812 if (method->iflags & (METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL | METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
4813 (method->flags & (METHOD_ATTRIBUTE_PINVOKE_IMPL | METHOD_ATTRIBUTE_ABSTRACT))) {
4817 memset (&ctx, 0, sizeof (VerifyContext));
4819 //FIXME use mono_method_get_signature_full
4820 ctx.signature = mono_method_signature (method);
4821 if (!ctx.signature) {
4822 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Could not decode method signature"));
4824 finish_collect_stats ();
4827 if (!method->is_generic && !method->klass->is_generic && ctx.signature->has_type_parameters) {
4828 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Method and signature don't match in terms of genericity"));
4829 finish_collect_stats ();
4833 ctx.header = mono_method_get_header (method);
4835 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Could not decode method header"));
4836 finish_collect_stats ();
4839 ctx.method = method;
4840 code_start = ip = ctx.header->code;
4841 end = ip + ctx.header->code_size;
4842 ctx.image = image = method->klass->image;
4845 ctx.max_args = ctx.signature->param_count + ctx.signature->hasthis;
4846 ctx.max_stack = ctx.header->max_stack;
4847 ctx.verifiable = ctx.valid = 1;
4850 ctx.code = g_new (ILCodeDesc, ctx.header->code_size);
4851 ctx.code_size = ctx.header->code_size;
4852 _MEM_ALLOC (sizeof (ILCodeDesc) * ctx.header->code_size);
4854 memset(ctx.code, 0, sizeof (ILCodeDesc) * ctx.header->code_size);
4856 ctx.num_locals = ctx.header->num_locals;
4857 ctx.locals = g_memdup (ctx.header->locals, sizeof (MonoType*) * ctx.header->num_locals);
4858 _MEM_ALLOC (sizeof (MonoType*) * ctx.header->num_locals);
4860 if (ctx.num_locals > 0 && !ctx.header->init_locals)
4861 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Method with locals variable but without init locals set"));
4863 ctx.params = g_new (MonoType*, ctx.max_args);
4864 _MEM_ALLOC (sizeof (MonoType*) * ctx.max_args);
4866 if (ctx.signature->hasthis)
4867 ctx.params [0] = method->klass->valuetype ? &method->klass->this_arg : &method->klass->byval_arg;
4868 memcpy (ctx.params + ctx.signature->hasthis, ctx.signature->params, sizeof (MonoType *) * ctx.signature->param_count);
4870 if (ctx.signature->is_inflated)
4871 ctx.generic_context = generic_context = mono_method_get_context (method);
4873 if (!generic_context && (method->klass->generic_container || method->is_generic)) {
4874 if (method->is_generic)
4875 ctx.generic_context = generic_context = &(mono_method_get_generic_container (method)->context);
4877 ctx.generic_context = generic_context = &method->klass->generic_container->context;
4880 for (i = 0; i < ctx.num_locals; ++i) {
4881 MonoType *uninflated = ctx.locals [i];
4882 ctx.locals [i] = mono_class_inflate_generic_type_checked (ctx.locals [i], ctx.generic_context, &error);
4883 if (!mono_error_ok (&error)) {
4884 char *name = mono_type_full_name (ctx.locals [i] ? ctx.locals [i] : uninflated);
4885 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid local %d of type %s", i, name));
4887 mono_error_cleanup (&error);
4888 /* we must not free (in cleanup) what was not yet allocated (but only copied) */
4894 for (i = 0; i < ctx.max_args; ++i) {
4895 MonoType *uninflated = ctx.params [i];
4896 ctx.params [i] = mono_class_inflate_generic_type_checked (ctx.params [i], ctx.generic_context, &error);
4897 if (!mono_error_ok (&error)) {
4898 char *name = mono_type_full_name (ctx.params [i] ? ctx.params [i] : uninflated);
4899 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid parameter %d of type %s", i, name));
4901 mono_error_cleanup (&error);
4902 /* we must not free (in cleanup) what was not yet allocated (but only copied) */
4907 stack_init (&ctx, &ctx.eval);
4909 for (i = 0; i < ctx.num_locals; ++i) {
4910 if (!mono_type_is_valid_in_context (&ctx, ctx.locals [i]))
4912 if (get_stack_type (ctx.locals [i]) == TYPE_INV) {
4913 char *name = mono_type_full_name (ctx.locals [i]);
4914 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid local %i of type %s", i, name));
4921 for (i = 0; i < ctx.max_args; ++i) {
4922 if (!mono_type_is_valid_in_context (&ctx, ctx.params [i]))
4925 if (get_stack_type (ctx.params [i]) == TYPE_INV) {
4926 char *name = mono_type_full_name (ctx.params [i]);
4927 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid parameter %i of type %s", i, name));
4936 for (i = 0; i < ctx.header->num_clauses && ctx.valid; ++i) {
4937 MonoExceptionClause *clause = ctx.header->clauses + i;
4938 VERIFIER_DEBUG (printf ("clause try %x len %x filter at %x handler at %x len %x\n", clause->try_offset, clause->try_len, clause->data.filter_offset, clause->handler_offset, clause->handler_len); );
4940 if (clause->try_offset > ctx.code_size || ADD_IS_GREATER_OR_OVF (clause->try_offset, clause->try_len, ctx.code_size))
4941 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try clause out of bounds at 0x%04x", clause->try_offset));
4943 if (clause->try_len <= 0)
4944 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try clause len <= 0 at 0x%04x", clause->try_offset));
4946 if (clause->handler_offset > ctx.code_size || ADD_IS_GREATER_OR_OVF (clause->handler_offset, clause->handler_len, ctx.code_size))
4947 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("handler clause out of bounds at 0x%04x", clause->try_offset));
4949 if (clause->handler_len <= 0)
4950 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("handler clause len <= 0 at 0x%04x", clause->try_offset));
4952 if (clause->try_offset < clause->handler_offset && ADD_IS_GREATER_OR_OVF (clause->try_offset, clause->try_len, HANDLER_START (clause)))
4953 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try block (at 0x%04x) includes handler block (at 0x%04x)", clause->try_offset, clause->handler_offset));
4955 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
4956 if (clause->data.filter_offset > ctx.code_size)
4957 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("filter clause out of bounds at 0x%04x", clause->try_offset));
4959 if (clause->data.filter_offset >= clause->handler_offset)
4960 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("filter clause must come before the handler clause at 0x%04x", clause->data.filter_offset));
4963 for (n = i + 1; n < ctx.header->num_clauses && ctx.valid; ++n)
4964 verify_clause_relationship (&ctx, clause, ctx.header->clauses + n);
4969 ctx.code [clause->try_offset].flags |= IL_CODE_FLAG_WAS_TARGET;
4970 if (clause->try_offset + clause->try_len < ctx.code_size)
4971 ctx.code [clause->try_offset + clause->try_len].flags |= IL_CODE_FLAG_WAS_TARGET;
4972 if (clause->handler_offset + clause->handler_len < ctx.code_size)
4973 ctx.code [clause->handler_offset + clause->handler_len].flags |= IL_CODE_FLAG_WAS_TARGET;
4975 if (clause->flags == MONO_EXCEPTION_CLAUSE_NONE) {
4976 if (!clause->data.catch_class) {
4977 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Catch clause %d with invalid type", i));
4980 if (!mono_type_is_valid_in_context (&ctx, &clause->data.catch_class->byval_arg))
4983 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->handler_offset, clause->data.catch_class);
4985 else if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
4986 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->data.filter_offset, mono_defaults.exception_class);
4987 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->handler_offset, mono_defaults.exception_class);
4994 original_bb = bb = mono_basic_block_split (method, &error);
4995 if (!mono_error_ok (&error)) {
4996 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid branch target: %s", mono_error_get_message (&error)));
4997 mono_error_cleanup (&error);
5002 while (ip < end && ctx.valid) {
5004 ip_offset = (guint) (ip - code_start);
5006 const unsigned char *ip_copy = ip;
5009 if (ip_offset > bb->end) {
5010 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or EH block at [0x%04x] targets middle instruction at 0x%04x", bb->end, ip_offset));
5014 if (ip_offset == bb->end)
5017 op_size = mono_opcode_value_and_size (&ip_copy, end, &op);
5018 if (op_size == -1) {
5019 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction %x at 0x%04x", *ip, ip_offset));
5023 if (ADD_IS_GREATER_OR_OVF (ip_offset, op_size, bb->end)) {
5024 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or EH block targets middle of instruction at 0x%04x", ip_offset));
5028 /*Last Instruction*/
5029 if (ip_offset + op_size == bb->end && mono_opcode_is_prefix (op)) {
5030 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or EH block targets between prefix '%s' and instruction at 0x%04x", mono_opcode_name (op), ip_offset));
5035 ctx.ip_offset = ip_offset = (guint) (ip - code_start);
5037 /*We need to check against fallthrou in and out of protected blocks.
5038 * For fallout we check the once a protected block ends, if the start flag is not set.
5039 * Likewise for fallthru in, we check if ip is the start of a protected block and start is not set
5040 * TODO convert these checks to be done using flags and not this loop
5042 for (i = 0; i < ctx.header->num_clauses && ctx.valid; ++i) {
5043 MonoExceptionClause *clause = ctx.header->clauses + i;
5045 if ((clause->try_offset + clause->try_len == ip_offset) && start == 0) {
5046 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallthru off try block at 0x%04x", ip_offset));
5050 if ((clause->handler_offset + clause->handler_len == ip_offset) && start == 0) {
5051 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER)
5052 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("fallout of handler block at 0x%04x", ip_offset));
5054 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallout of handler block at 0x%04x", ip_offset));
5058 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER && clause->handler_offset == ip_offset && start == 0) {
5059 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("fallout of filter block at 0x%04x", ip_offset));
5063 if (clause->handler_offset == ip_offset && start == 0) {
5064 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallthru handler block at 0x%04x", ip_offset));
5068 if (clause->try_offset == ip_offset && ctx.eval.size > 0 && start == 0) {
5069 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Try to enter try block with a non-empty stack at 0x%04x", ip_offset));
5074 /*This must be done after fallthru detection otherwise it won't happen.*/
5076 /*FIXME remove this once we move all bad branch checking code to use BB only*/
5077 ctx.code [ip_offset].flags |= IL_CODE_FLAG_SEEN;
5086 VERIFIER_DEBUG ( printf ("extra merge needed! 0x%04x \n", ctx.target); );
5087 merge_stacks (&ctx, &ctx.eval, &ctx.code [ctx.target], FALSE, TRUE);
5090 merge_stacks (&ctx, &ctx.eval, &ctx.code[ip_offset], start, FALSE);
5093 /*TODO we can fast detect a forward branch or exception block targeting code after prefix, we should fail fast*/
5094 #ifdef MONO_VERIFIER_DEBUG
5097 discode = mono_disasm_code_one (NULL, method, ip, NULL);
5098 discode [strlen (discode) - 1] = 0; /* no \n */
5099 g_print ("[%d] %-29s (%d)\n", ip_offset, discode, ctx.eval.size);
5102 dump_stack_state (&ctx.code [ip_offset]);
5103 dump_stack_state (&ctx.eval);
5116 push_arg (&ctx, *ip - CEE_LDARG_0, FALSE);
5122 code_bounds_check (2);
5123 push_arg (&ctx, ip [1], *ip == CEE_LDARGA_S);
5127 case CEE_ADD_OVF_UN:
5128 do_binop (&ctx, *ip, add_ovf_un_table);
5132 case CEE_SUB_OVF_UN:
5133 do_binop (&ctx, *ip, sub_ovf_un_table);
5140 case CEE_MUL_OVF_UN:
5141 do_binop (&ctx, *ip, bin_ovf_table);
5146 do_binop (&ctx, *ip, add_table);
5151 do_binop (&ctx, *ip, sub_table);
5158 do_binop (&ctx, *ip, bin_op_table);
5167 do_binop (&ctx, *ip, int_bin_op_table);
5174 do_binop (&ctx, *ip, shift_op_table);
5179 if (!check_underflow (&ctx, 1))
5181 stack_pop_safe (&ctx);
5195 /*TODO support definite assignment verification? */
5196 push_local (&ctx, *ip - CEE_LDLOC_0, FALSE);
5204 store_local (&ctx, *ip - CEE_STLOC_0);
5209 code_bounds_check (2);
5210 store_local (&ctx, ip [1]);
5215 code_bounds_check (2);
5216 store_arg (&ctx, ip [1]);
5230 if (check_overflow (&ctx))
5231 stack_push_val (&ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
5236 code_bounds_check (2);
5237 if (check_overflow (&ctx))
5238 stack_push_val (&ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
5243 code_bounds_check (5);
5244 if (check_overflow (&ctx))
5245 stack_push_val (&ctx,TYPE_I4, &mono_defaults.int32_class->byval_arg);
5250 code_bounds_check (9);
5251 if (check_overflow (&ctx))
5252 stack_push_val (&ctx,TYPE_I8, &mono_defaults.int64_class->byval_arg);
5257 code_bounds_check (5);
5258 if (check_overflow (&ctx))
5259 stack_push_val (&ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
5264 code_bounds_check (9);
5265 if (check_overflow (&ctx))
5266 stack_push_val (&ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
5271 if (check_overflow (&ctx))
5272 stack_push_val (&ctx, TYPE_COMPLEX | NULL_LITERAL_MASK, &mono_defaults.object_class->byval_arg);
5278 code_bounds_check (2);
5279 do_branch_op (&ctx, (signed char)ip [1] + 2, cmp_br_eq_op);
5292 code_bounds_check (2);
5293 do_branch_op (&ctx, (signed char)ip [1] + 2, cmp_br_op);
5300 code_bounds_check (5);
5301 do_branch_op (&ctx, (gint32)read32 (ip + 1) + 5, cmp_br_eq_op);
5314 code_bounds_check (5);
5315 do_branch_op (&ctx, (gint32)read32 (ip + 1) + 5, cmp_br_op);
5322 code_bounds_check (2);
5323 push_local (&ctx, ip[1], *ip == CEE_LDLOCA_S);
5328 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5334 if (!check_underflow (&ctx, 1))
5336 if (!check_overflow (&ctx))
5338 top = stack_push (&ctx);
5339 copy_stack_value (top, stack_peek (&ctx, 1));
5345 code_bounds_check (5);
5347 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Eval stack must be empty in jmp at 0x%04x", ip_offset));
5348 token = read32 (ip + 1);
5349 if (in_any_block (ctx.header, ip_offset))
5350 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("jmp cannot escape exception blocks at 0x%04x", ip_offset));
5352 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Intruction jmp is not verifiable at 0x%04x", ctx.ip_offset));
5354 * FIXME: check signature, retval, arguments etc.
5360 code_bounds_check (5);
5361 do_invoke_method (&ctx, read32 (ip + 1), *ip == CEE_CALLVIRT);
5366 code_bounds_check (5);
5367 token = read32 (ip + 1);
5369 * FIXME: check signature, retval, arguments etc.
5370 * FIXME: check requirements for tail call
5372 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Intruction calli is not verifiable at 0x%04x", ctx.ip_offset));
5376 code_bounds_check (2);
5377 do_static_branch (&ctx, (signed char)ip [1] + 2);
5385 code_bounds_check (2);
5386 do_boolean_branch_op (&ctx, (signed char)ip [1] + 2);
5392 code_bounds_check (5);
5393 do_static_branch (&ctx, (gint32)read32 (ip + 1) + 5);
5401 code_bounds_check (5);
5402 do_boolean_branch_op (&ctx, (gint32)read32 (ip + 1) + 5);
5409 code_bounds_check (5);
5410 entries = read32 (ip + 1);
5412 if (entries > 0xFFFFFFFFU / sizeof (guint32))
5413 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Too many switch entries %x at 0x%04x", entries, ctx.ip_offset));
5416 code_bounds_check (sizeof (guint32) * entries);
5418 do_switch (&ctx, entries, ip);
5419 ip += sizeof (guint32) * entries;
5433 do_load_indirect (&ctx, *ip);
5445 do_store_indirect (&ctx, *ip);
5451 do_unary_math_op (&ctx, *ip);
5461 do_conversion (&ctx, TYPE_I4);
5467 do_conversion (&ctx, TYPE_I8);
5474 do_conversion (&ctx, TYPE_R8);
5480 do_conversion (&ctx, TYPE_NATIVE_INT);
5485 code_bounds_check (5);
5486 do_cpobj (&ctx, read32 (ip + 1));
5491 code_bounds_check (5);
5492 do_ldobj_value (&ctx, read32 (ip + 1));
5497 code_bounds_check (5);
5498 do_ldstr (&ctx, read32 (ip + 1));
5503 code_bounds_check (5);
5504 do_newobj (&ctx, read32 (ip + 1));
5510 code_bounds_check (5);
5511 do_cast (&ctx, read32 (ip + 1), *ip == CEE_CASTCLASS ? "castclass" : "isinst");
5517 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5522 code_bounds_check (5);
5523 do_unbox_value (&ctx, read32 (ip + 1));
5535 code_bounds_check (5);
5536 do_push_field (&ctx, read32 (ip + 1), *ip == CEE_LDFLDA);
5542 code_bounds_check (5);
5543 do_push_static_field (&ctx, read32 (ip + 1), *ip == CEE_LDSFLDA);
5548 code_bounds_check (5);
5549 do_store_field (&ctx, read32 (ip + 1));
5554 code_bounds_check (5);
5555 do_store_static_field (&ctx, read32 (ip + 1));
5560 code_bounds_check (5);
5561 do_stobj (&ctx, read32 (ip + 1));
5565 case CEE_CONV_OVF_I1_UN:
5566 case CEE_CONV_OVF_I2_UN:
5567 case CEE_CONV_OVF_I4_UN:
5568 case CEE_CONV_OVF_U1_UN:
5569 case CEE_CONV_OVF_U2_UN:
5570 case CEE_CONV_OVF_U4_UN:
5571 do_conversion (&ctx, TYPE_I4);
5575 case CEE_CONV_OVF_I8_UN:
5576 case CEE_CONV_OVF_U8_UN:
5577 do_conversion (&ctx, TYPE_I8);
5581 case CEE_CONV_OVF_I_UN:
5582 case CEE_CONV_OVF_U_UN:
5583 do_conversion (&ctx, TYPE_NATIVE_INT);
5588 code_bounds_check (5);
5589 do_box_value (&ctx, read32 (ip + 1));
5594 code_bounds_check (5);
5595 do_newarr (&ctx, read32 (ip + 1));
5605 code_bounds_check (5);
5606 do_ldelema (&ctx, read32 (ip + 1));
5620 case CEE_LDELEM_REF:
5621 do_ldelem (&ctx, *ip, 0);
5632 case CEE_STELEM_REF:
5633 do_stelem (&ctx, *ip, 0);
5638 code_bounds_check (5);
5639 do_ldelem (&ctx, *ip, read32 (ip + 1));
5644 code_bounds_check (5);
5645 do_stelem (&ctx, *ip, read32 (ip + 1));
5650 code_bounds_check (5);
5651 do_unbox_any (&ctx, read32 (ip + 1));
5655 case CEE_CONV_OVF_I1:
5656 case CEE_CONV_OVF_U1:
5657 case CEE_CONV_OVF_I2:
5658 case CEE_CONV_OVF_U2:
5659 case CEE_CONV_OVF_I4:
5660 case CEE_CONV_OVF_U4:
5661 do_conversion (&ctx, TYPE_I4);
5665 case CEE_CONV_OVF_I8:
5666 case CEE_CONV_OVF_U8:
5667 do_conversion (&ctx, TYPE_I8);
5671 case CEE_CONV_OVF_I:
5672 case CEE_CONV_OVF_U:
5673 do_conversion (&ctx, TYPE_NATIVE_INT);
5678 code_bounds_check (5);
5679 do_refanyval (&ctx, read32 (ip + 1));
5689 code_bounds_check (5);
5690 do_mkrefany (&ctx, read32 (ip + 1));
5695 code_bounds_check (5);
5696 do_load_token (&ctx, read32 (ip + 1));
5700 case CEE_ENDFINALLY:
5701 if (!is_correct_endfinally (ctx.header, ip_offset))
5702 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("endfinally must be used inside a finally/fault handler at 0x%04x", ctx.ip_offset));
5709 code_bounds_check (5);
5710 do_leave (&ctx, read32 (ip + 1) + 5);
5717 code_bounds_check (2);
5718 do_leave (&ctx, (signed char)ip [1] + 2);
5725 code_bounds_check (2);
5729 code_bounds_check (3);
5730 store_local (&ctx, read16 (ip + 1));
5735 do_cmp_op (&ctx, cmp_br_eq_op, *ip);
5743 do_cmp_op (&ctx, cmp_br_op, *ip);
5748 code_bounds_check (3);
5749 store_arg (&ctx, read16 (ip + 1) );
5755 if (!check_overflow (&ctx))
5757 if (ctx.signature->call_convention != MONO_CALL_VARARG)
5758 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Cannot use arglist on method without VARGARG calling convention at 0x%04x", ctx.ip_offset));
5759 set_stack_value (&ctx, stack_push (&ctx), &mono_defaults.argumenthandle_class->byval_arg, FALSE);
5764 code_bounds_check (5);
5765 do_load_function_ptr (&ctx, read32 (ip + 1), FALSE);
5770 code_bounds_check (5);
5771 do_load_function_ptr (&ctx, read32 (ip + 1), TRUE);
5777 code_bounds_check (3);
5778 push_arg (&ctx, read16 (ip + 1), *ip == CEE_LDARGA);
5784 code_bounds_check (3);
5785 push_local (&ctx, read16 (ip + 1), *ip == CEE_LDLOCA);
5798 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5802 do_endfilter (&ctx);
5806 case CEE_UNALIGNED_:
5807 code_bounds_check (2);
5808 prefix |= PREFIX_UNALIGNED;
5812 prefix |= PREFIX_VOLATILE;
5816 prefix |= PREFIX_TAIL;
5818 if (ip < end && (*ip != CEE_CALL && *ip != CEE_CALLI && *ip != CEE_CALLVIRT))
5819 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("tail prefix must be used only with call opcodes at 0x%04x", ip_offset));
5823 code_bounds_check (5);
5824 do_initobj (&ctx, read32 (ip + 1));
5828 case CEE_CONSTRAINED_:
5829 code_bounds_check (5);
5830 ctx.constrained_type = get_boxable_mono_type (&ctx, read32 (ip + 1), "constrained.");
5831 prefix |= PREFIX_CONSTRAINED;
5836 prefix |= PREFIX_READONLY;
5841 CLEAR_PREFIX (&ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
5842 if (!check_underflow (&ctx, 3))
5844 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Instruction cpblk is not verifiable at 0x%04x", ctx.ip_offset));
5849 CLEAR_PREFIX (&ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
5850 if (!check_underflow (&ctx, 3))
5852 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Instruction initblk is not verifiable at 0x%04x", ctx.ip_offset));
5860 if (!is_correct_rethrow (ctx.header, ip_offset))
5861 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("rethrow must be used inside a catch handler at 0x%04x", ctx.ip_offset));
5868 code_bounds_check (5);
5869 do_sizeof (&ctx, read32 (ip + 1));
5873 case CEE_REFANYTYPE:
5874 do_refanytype (&ctx);
5879 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction FE %x at 0x%04x", *ip, ctx.ip_offset));
5885 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction %x at 0x%04x", *ip, ctx.ip_offset));
5889 /*TODO we can fast detect a forward branch or exception block targeting code after prefix, we should fail fast*/
5891 if (!ctx.prefix_set) //first prefix
5892 ctx.code [ctx.ip_offset].flags |= IL_CODE_FLAG_SEEN;
5893 ctx.prefix_set |= prefix;
5894 ctx.has_flags = TRUE;
5898 ctx.code [ctx.ip_offset].flags |= IL_CODE_FLAG_SEEN;
5900 if (ctx.prefix_set & PREFIX_CONSTRAINED)
5901 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after constrained prefix at 0x%04x", ctx.ip_offset));
5902 if (ctx.prefix_set & PREFIX_READONLY)
5903 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after readonly prefix at 0x%04x", ctx.ip_offset));
5904 if (ctx.prefix_set & PREFIX_VOLATILE)
5905 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after volatile prefix at 0x%04x", ctx.ip_offset));
5906 if (ctx.prefix_set & PREFIX_UNALIGNED)
5907 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after unaligned prefix at 0x%04x", ctx.ip_offset));
5908 ctx.prefix_set = prefix = 0;
5909 ctx.has_flags = FALSE;
5913 * if ip != end we overflowed: mark as error.
5915 if ((ip != end || !start) && ctx.verifiable && !ctx.list) {
5916 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Run ahead of method code at 0x%04x", ip_offset));
5919 /*We should guard against the last decoded opcode, otherwise we might add errors that doesn't make sense.*/
5920 for (i = 0; i < ctx.code_size && i < ip_offset; ++i) {
5921 if (ctx.code [i].flags & IL_CODE_FLAG_WAS_TARGET) {
5922 if (!(ctx.code [i].flags & IL_CODE_FLAG_SEEN))
5923 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or exception block target middle of intruction at 0x%04x", i));
5925 if (ctx.code [i].flags & IL_CODE_DELEGATE_SEQUENCE)
5926 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Branch to delegate code sequence at 0x%04x", i));
5928 if ((ctx.code [i].flags & IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL) && ctx.has_this_store)
5929 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Invalid ldftn with virtual function in method with stdarg 0 at 0x%04x", i));
5931 if ((ctx.code [i].flags & IL_CODE_CALL_NONFINAL_VIRTUAL) && ctx.has_this_store)
5932 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Invalid call to a non-final virtual function in method with stdarg.0 or ldarga.0 at 0x%04x", i));
5935 if (mono_method_is_constructor (ctx.method) && !ctx.super_ctor_called && !ctx.method->klass->valuetype && ctx.method->klass != mono_defaults.object_class) {
5936 char *method_name = mono_method_full_name (ctx.method, TRUE);
5937 char *type = mono_type_get_full_name (ctx.method->klass);
5938 if (ctx.method->klass->parent && ctx.method->klass->parent->exception_type != MONO_EXCEPTION_NONE)
5939 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Constructor %s for type %s not calling base type ctor due to a TypeLoadException on base type.", method_name, type));
5941 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Constructor %s for type %s not calling base type ctor.", method_name, type));
5942 g_free (method_name);
5948 for (i = 0; i < ctx.header->code_size; ++i) {
5949 if (ctx.code [i].stack)
5950 g_free (ctx.code [i].stack);
5954 for (tmp = ctx.funptrs; tmp; tmp = tmp->next)
5956 g_slist_free (ctx.funptrs);
5958 for (tmp = ctx.exception_types; tmp; tmp = tmp->next)
5959 mono_metadata_free_type (tmp->data);
5960 g_slist_free (ctx.exception_types);
5962 for (i = 0; i < ctx.num_locals; ++i) {
5964 mono_metadata_free_type (ctx.locals [i]);
5966 for (i = 0; i < ctx.max_args; ++i) {
5968 mono_metadata_free_type (ctx.params [i]);
5972 g_free (ctx.eval.stack);
5975 g_free (ctx.locals);
5976 g_free (ctx.params);
5977 mono_basic_block_free (original_bb);
5978 mono_metadata_free_mh (ctx.header);
5980 finish_collect_stats ();
5985 mono_verify_corlib ()
5987 /* This is a public API function so cannot be removed */
5992 * Returns true if @method needs to be verified.
5996 mono_verifier_is_enabled_for_method (MonoMethod *method)
5998 return mono_verifier_is_enabled_for_class (method->klass) && (method->wrapper_type == MONO_WRAPPER_NONE || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD);
6002 * Returns true if @klass need to be verified.
6006 mono_verifier_is_enabled_for_class (MonoClass *klass)
6008 return verify_all || (verifier_mode > MONO_VERIFIER_MODE_OFF && !(klass->image->assembly && klass->image->assembly->in_gac) && klass->image != mono_defaults.corlib);
6012 mono_verifier_is_enabled_for_image (MonoImage *image)
6014 return verify_all || verifier_mode > MONO_VERIFIER_MODE_OFF;
6018 * Dynamic methods are not considered full trust since if the user is trusted and need to
6019 * generate unsafe code, make the method skip verification - this is a known good way to do it.
6022 mono_verifier_is_method_full_trust (MonoMethod *method)
6024 return mono_verifier_is_class_full_trust (method->klass) && !method_is_dynamic (method);
6028 * Returns if @klass is under full trust or not.
6030 * TODO This code doesn't take CAS into account.
6032 * Under verify_all all user code must be verifiable if no security option was set
6036 mono_verifier_is_class_full_trust (MonoClass *klass)
6038 /* under CoreCLR code is trusted if it is part of the "platform" otherwise all code inside the GAC is trusted */
6039 gboolean trusted_location = !mono_security_core_clr_enabled () ?
6040 (klass->image->assembly && klass->image->assembly->in_gac) : mono_security_core_clr_is_platform_image (klass->image);
6042 if (verify_all && verifier_mode == MONO_VERIFIER_MODE_OFF)
6043 return trusted_location || klass->image == mono_defaults.corlib;
6044 return verifier_mode < MONO_VERIFIER_MODE_VERIFIABLE || trusted_location || klass->image == mono_defaults.corlib;
6048 mono_method_verify_with_current_settings (MonoMethod *method, gboolean skip_visibility, gboolean is_fulltrust)
6050 return mono_method_verify (method,
6051 (verifier_mode != MONO_VERIFIER_MODE_STRICT ? MONO_VERIFY_NON_STRICT: 0)
6052 | (!is_fulltrust && !mono_verifier_is_method_full_trust (method) ? MONO_VERIFY_FAIL_FAST : 0)
6053 | (skip_visibility ? MONO_VERIFY_SKIP_VISIBILITY : 0));
6057 get_field_end (MonoClassField *field)
6060 int size = mono_type_size (field->type, &align);
6062 size = 4; /*FIXME Is this a safe bet?*/
6063 return size + field->offset;
6067 verify_class_for_overlapping_reference_fields (MonoClass *class)
6070 gpointer iter = NULL;
6071 MonoClassField *field;
6072 gboolean is_fulltrust = mono_verifier_is_class_full_trust (class);
6073 /*We can't skip types with !has_references since this is calculated after we have run.*/
6074 if (!((class->flags & TYPE_ATTRIBUTE_LAYOUT_MASK) == TYPE_ATTRIBUTE_EXPLICIT_LAYOUT))
6078 /*We must check for stuff overlapping reference fields.
6079 The outer loop uses mono_class_get_fields to ensure that MonoClass:fields get inited.
6081 while ((field = mono_class_get_fields (class, &iter))) {
6082 int fieldEnd = get_field_end (field);
6083 gboolean is_valuetype = !MONO_TYPE_IS_REFERENCE (field->type);
6086 if (mono_field_is_deleted (field) || (field->type->attrs & FIELD_ATTRIBUTE_STATIC))
6089 for (j = i; j < class->field.count; ++j) {
6090 MonoClassField *other = &class->fields [j];
6091 int otherEnd = get_field_end (other);
6092 if (mono_field_is_deleted (other) || (is_valuetype && !MONO_TYPE_IS_REFERENCE (other->type)) || (other->type->attrs & FIELD_ATTRIBUTE_STATIC))
6095 if (!is_valuetype && MONO_TYPE_IS_REFERENCE (other->type) && field->offset == other->offset && is_fulltrust)
6098 if ((otherEnd > field->offset && otherEnd <= fieldEnd) || (other->offset >= field->offset && other->offset < fieldEnd))
6106 field_hash (gconstpointer key)
6108 const MonoClassField *field = key;
6109 return g_str_hash (field->name) ^ mono_metadata_type_hash (field->type); /**/
6113 field_equals (gconstpointer _a, gconstpointer _b)
6115 const MonoClassField *a = _a;
6116 const MonoClassField *b = _b;
6117 return !strcmp (a->name, b->name) && mono_metadata_type_equal (a->type, b->type);
6122 verify_class_fields (MonoClass *class)
6124 gpointer iter = NULL;
6125 MonoClassField *field;
6126 MonoGenericContext *context = mono_class_get_context (class);
6127 GHashTable *unique_fields = g_hash_table_new_full (&field_hash, &field_equals, NULL, NULL);
6128 if (class->generic_container)
6129 context = &class->generic_container->context;
6131 while ((field = mono_class_get_fields (class, &iter)) != NULL) {
6132 if (!mono_type_is_valid_type_in_context (field->type, context)) {
6133 g_hash_table_destroy (unique_fields);
6136 if (g_hash_table_lookup (unique_fields, field)) {
6137 g_hash_table_destroy (unique_fields);
6140 g_hash_table_insert (unique_fields, field, field);
6142 g_hash_table_destroy (unique_fields);
6147 verify_interfaces (MonoClass *class)
6150 for (i = 0; i < class->interface_count; ++i) {
6151 MonoClass *iface = class->interfaces [i];
6152 if (!(iface->flags & TYPE_ATTRIBUTE_INTERFACE))
6159 verify_valuetype_layout_with_target (MonoClass *class, MonoClass *target_class)
6162 gpointer iter = NULL;
6163 MonoClassField *field;
6164 MonoClass *field_class;
6166 if (!class->valuetype)
6169 type = class->byval_arg.type;
6170 /*primitive type fields are not properly decoded*/
6171 if ((type >= MONO_TYPE_BOOLEAN && type <= MONO_TYPE_R8) || (type >= MONO_TYPE_I && type <= MONO_TYPE_U))
6174 while ((field = mono_class_get_fields (class, &iter)) != NULL) {
6178 if (field->type->attrs & (FIELD_ATTRIBUTE_STATIC | FIELD_ATTRIBUTE_HAS_FIELD_RVA))
6181 field_class = mono_class_get_generic_type_definition (mono_class_from_mono_type (field->type));
6183 if (field_class == target_class || class == field_class || !verify_valuetype_layout_with_target (field_class, target_class))
6191 verify_valuetype_layout (MonoClass *class)
6194 res = verify_valuetype_layout_with_target (class, class);
6199 recursive_mark_constraint_args (MonoBitSet *used_args, MonoGenericContainer *gc, MonoType *type)
6202 MonoClass **constraints;
6203 MonoGenericParamInfo *param_info;
6205 g_assert (mono_type_is_generic_argument (type));
6207 idx = mono_type_get_generic_param_num (type);
6208 if (mono_bitset_test_fast (used_args, idx))
6211 mono_bitset_set_fast (used_args, idx);
6212 param_info = mono_generic_container_get_param_info (gc, idx);
6214 if (!param_info->constraints)
6217 for (constraints = param_info->constraints; *constraints; ++constraints) {
6218 MonoClass *ctr = *constraints;
6219 MonoType *constraint_type = &ctr->byval_arg;
6221 if (mono_type_is_generic_argument (constraint_type) && !recursive_mark_constraint_args (used_args, gc, constraint_type))
6228 verify_generic_parameters (MonoClass *class)
6231 MonoGenericContainer *gc = class->generic_container;
6232 MonoBitSet *used_args = mono_bitset_new (gc->type_argc, 0);
6234 for (i = 0; i < gc->type_argc; ++i) {
6235 MonoGenericParamInfo *param_info = mono_generic_container_get_param_info (gc, i);
6236 MonoClass **constraints;
6238 if (!param_info->constraints)
6241 mono_bitset_clear_all (used_args);
6242 mono_bitset_set_fast (used_args, i);
6244 for (constraints = param_info->constraints; *constraints; ++constraints) {
6245 MonoClass *ctr = *constraints;
6246 MonoType *constraint_type = &ctr->byval_arg;
6248 if (!mono_class_can_access_class (class, ctr))
6251 if (!mono_type_is_valid_type_in_context (constraint_type, &gc->context))
6254 if (mono_type_is_generic_argument (constraint_type) && !recursive_mark_constraint_args (used_args, gc, constraint_type))
6256 if (ctr->generic_class && !mono_class_is_valid_generic_instantiation (NULL, ctr))
6260 mono_bitset_free (used_args);
6264 mono_bitset_free (used_args);
6269 * Check if the class is verifiable.
6271 * Right now there are no conditions that make a class a valid but not verifiable. Both overlapping reference
6272 * field and invalid generic instantiation are fatal errors.
6274 * This method must be safe to be called from mono_class_init and all code must be carefull about that.
6278 mono_verifier_verify_class (MonoClass *class)
6280 /*Neither <Module>, object or ifaces have parent.*/
6281 if (!class->parent &&
6282 class != mono_defaults.object_class &&
6283 !MONO_CLASS_IS_INTERFACE (class) &&
6284 (!image_is_dynamic (class->image) && class->type_token != 0x2000001)) /*<Module> is the first type in the assembly*/
6286 if (class->parent) {
6287 if (MONO_CLASS_IS_INTERFACE (class->parent))
6289 if (!class->generic_class && class->parent->generic_container)
6291 if (class->parent->generic_class && !class->generic_class) {
6292 MonoGenericContext *context = mono_class_get_context (class);
6293 if (class->generic_container)
6294 context = &class->generic_container->context;
6295 if (!mono_type_is_valid_type_in_context (&class->parent->byval_arg, context))
6299 if (class->generic_container && (class->flags & TYPE_ATTRIBUTE_LAYOUT_MASK) == TYPE_ATTRIBUTE_EXPLICIT_LAYOUT)
6301 if (class->generic_container && !verify_generic_parameters (class))
6303 if (!verify_class_for_overlapping_reference_fields (class))
6305 if (class->generic_class && !mono_class_is_valid_generic_instantiation (NULL, class))
6307 if (class->generic_class == NULL && !verify_class_fields (class))
6309 if (class->valuetype && !verify_valuetype_layout (class))
6311 if (!verify_interfaces (class))
6317 mono_verifier_class_is_valid_generic_instantiation (MonoClass *class)
6319 return mono_class_is_valid_generic_instantiation (NULL, class);
6323 mono_verifier_is_method_valid_generic_instantiation (MonoMethod *method)
6325 if (!method->is_inflated)
6327 return mono_method_is_valid_generic_instantiation (NULL, method);
6333 mono_verifier_verify_class (MonoClass *class)
6335 /* The verifier was disabled at compile time */
6340 mono_method_verify_with_current_settings (MonoMethod *method, gboolean skip_visibility, gboolean is_fulltrust)
6342 /* The verifier was disabled at compile time */
6347 mono_verifier_is_class_full_trust (MonoClass *klass)
6349 /* The verifier was disabled at compile time */
6354 mono_verifier_is_method_full_trust (MonoMethod *method)
6356 /* The verifier was disabled at compile time */
6361 mono_verifier_is_enabled_for_image (MonoImage *image)
6363 /* The verifier was disabled at compile time */
6368 mono_verifier_is_enabled_for_class (MonoClass *klass)
6370 /* The verifier was disabled at compile time */
6375 mono_verifier_is_enabled_for_method (MonoMethod *method)
6377 /* The verifier was disabled at compile time */
6382 mono_method_verify (MonoMethod *method, int level)
6384 /* The verifier was disabled at compile time */
6389 mono_free_verify_list (GSList *list)
6391 /* The verifier was disabled at compile time */
6392 /* will always be null if verifier is disabled */
6396 mono_verifier_class_is_valid_generic_instantiation (MonoClass *class)
6402 mono_verifier_is_method_valid_generic_instantiation (MonoMethod *method)