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/metadata/class-internals.h>
30 #include <mono/utils/mono-counters.h>
31 #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) {
938 MonoClassField *field;
939 MonoClass *klass = NULL;
941 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
942 field = mono_method_get_wrapper_data (ctx->method, (guint32)token);
943 klass = field ? field->parent : NULL;
945 if (!IS_FIELD_DEF_OR_REF (token) || !token_bounds_check (ctx->image, token)) {
946 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);
950 field = mono_field_from_token_checked (ctx->image, token, &klass, ctx->generic_context, &error);
951 mono_error_cleanup (&error); /*FIXME don't swallow the error */
954 if (!field || !field->parent || !klass) {
955 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);
959 if (!mono_type_is_valid_in_context (ctx, &klass->byval_arg))
962 if (mono_field_get_flags (field) & FIELD_ATTRIBUTE_LITERAL) {
963 char *type_name = mono_type_get_full_name (field->parent);
964 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot reference literal field %s::%s at 0x%04x", type_name, field->name, ctx->ip_offset));
974 verifier_load_method (VerifyContext *ctx, int token, const char *opcode) {
978 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
979 method = mono_method_get_wrapper_data (ctx->method, (guint32)token);
982 if (!IS_METHOD_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
983 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);
987 method = mono_get_method_checked (ctx->image, token, NULL, ctx->generic_context, &error);
988 mono_error_cleanup (&error); /* FIXME don't swallow this error */
992 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);
996 if (mono_method_is_valid_in_context (ctx, method) == RESULT_INVALID)
1003 verifier_load_type (VerifyContext *ctx, int token, const char *opcode) {
1006 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
1007 MonoClass *class = mono_method_get_wrapper_data (ctx->method, (guint32)token);
1008 type = class ? &class->byval_arg : NULL;
1011 if (!IS_TYPE_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
1012 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid type token 0x%08x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
1015 type = mono_type_get_checked (ctx->image, token, ctx->generic_context, &error);
1016 mono_error_cleanup (&error); /*FIXME don't swallow the error */
1019 if (!type || mono_loader_get_last_error ()) {
1020 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);
1021 mono_loader_clear_error ();
1025 if (!mono_type_is_valid_in_context (ctx, type))
1032 /* stack_slot_get_type:
1034 * Returns the stack type of @value. This value includes POINTER_MASK.
1036 * Use this function to checks that account for a managed pointer.
1039 stack_slot_get_type (ILStackDesc *value)
1041 return value->stype & RAW_TYPE_MASK;
1044 /* stack_slot_get_underlying_type:
1046 * Returns the stack type of @value. This value does not include POINTER_MASK.
1048 * Use this function is cases where the fact that the value could be a managed pointer is
1049 * irrelevant. For example, field load doesn't care about this fact of type on stack.
1052 stack_slot_get_underlying_type (ILStackDesc *value)
1054 return value->stype & TYPE_MASK;
1057 /* stack_slot_is_managed_pointer:
1059 * Returns TRUE is @value is a managed pointer.
1062 stack_slot_is_managed_pointer (ILStackDesc *value)
1064 return (value->stype & POINTER_MASK) == POINTER_MASK;
1067 /* stack_slot_is_managed_mutability_pointer:
1069 * Returns TRUE is @value is a managed mutability pointer.
1071 static G_GNUC_UNUSED gboolean
1072 stack_slot_is_managed_mutability_pointer (ILStackDesc *value)
1074 return (value->stype & CMMP_MASK) == CMMP_MASK;
1077 /* stack_slot_is_null_literal:
1079 * Returns TRUE is @value is the null literal.
1082 stack_slot_is_null_literal (ILStackDesc *value)
1084 return (value->stype & NULL_LITERAL_MASK) == NULL_LITERAL_MASK;
1088 /* stack_slot_is_this_pointer:
1090 * Returns TRUE is @value is the this literal
1093 stack_slot_is_this_pointer (ILStackDesc *value)
1095 return (value->stype & THIS_POINTER_MASK) == THIS_POINTER_MASK;
1098 /* stack_slot_is_boxed_value:
1100 * Returns TRUE is @value is a boxed value
1103 stack_slot_is_boxed_value (ILStackDesc *value)
1105 return (value->stype & BOXED_MASK) == BOXED_MASK;
1109 stack_slot_get_name (ILStackDesc *value)
1111 return type_names [value->stype & TYPE_MASK];
1114 #define APPEND_WITH_PREDICATE(PRED,NAME) do {\
1115 if (PRED (value)) { \
1117 g_string_append (str, ", "); \
1118 g_string_append (str, NAME); \
1123 stack_slot_stack_type_full_name (ILStackDesc *value)
1125 GString *str = g_string_new ("");
1127 gboolean has_pred = FALSE, first = TRUE;
1129 if ((value->stype & TYPE_MASK) != value->stype) {
1130 g_string_append(str, "[");
1131 APPEND_WITH_PREDICATE (stack_slot_is_this_pointer, "this");
1132 APPEND_WITH_PREDICATE (stack_slot_is_boxed_value, "boxed");
1133 APPEND_WITH_PREDICATE (stack_slot_is_null_literal, "null");
1134 APPEND_WITH_PREDICATE (stack_slot_is_managed_mutability_pointer, "cmmp");
1135 APPEND_WITH_PREDICATE (stack_slot_is_managed_pointer, "mp");
1139 if (mono_type_is_generic_argument (value->type) && !stack_slot_is_boxed_value (value)) {
1141 g_string_append(str, "[");
1143 g_string_append (str, ", ");
1144 g_string_append (str, "unboxed");
1149 g_string_append(str, "] ");
1151 g_string_append (str, stack_slot_get_name (value));
1153 g_string_free (str, FALSE);
1158 stack_slot_full_name (ILStackDesc *value)
1160 char *type_name = mono_type_full_name (value->type);
1161 char *stack_name = stack_slot_stack_type_full_name (value);
1162 char *res = g_strdup_printf ("%s (%s)", type_name, stack_name);
1164 g_free (stack_name);
1168 //////////////////////////////////////////////////////////////////
1170 mono_free_verify_list (GSList *list)
1172 MonoVerifyInfoExtended *info;
1175 for (tmp = list; tmp; tmp = tmp->next) {
1177 g_free (info->info.message);
1180 g_slist_free (list);
1183 #define ADD_ERROR(list,msg) \
1185 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1186 vinfo->info.status = MONO_VERIFY_ERROR; \
1187 vinfo->info.message = (msg); \
1188 (list) = g_slist_prepend ((list), vinfo); \
1191 #define ADD_WARN(list,code,msg) \
1193 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1194 vinfo->info.status = (code); \
1195 vinfo->info.message = (msg); \
1196 (list) = g_slist_prepend ((list), vinfo); \
1199 #define ADD_INVALID(list,msg) \
1201 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1202 vinfo->status = MONO_VERIFY_ERROR; \
1203 vinfo->message = (msg); \
1204 (list) = g_slist_prepend ((list), vinfo); \
1205 /*G_BREAKPOINT ();*/ \
1209 #define CHECK_STACK_UNDERFLOW(num) \
1211 if (cur_stack < (num)) \
1212 ADD_INVALID (list, g_strdup_printf ("Stack underflow at 0x%04x (%d items instead of %d)", ip_offset, cur_stack, (num))); \
1215 #define CHECK_STACK_OVERFLOW() \
1217 if (cur_stack >= max_stack) \
1218 ADD_INVALID (list, g_strdup_printf ("Maxstack exceeded at 0x%04x", ip_offset)); \
1223 in_any_block (MonoMethodHeader *header, guint offset)
1226 MonoExceptionClause *clause;
1228 for (i = 0; i < header->num_clauses; ++i) {
1229 clause = &header->clauses [i];
1230 if (MONO_OFFSET_IN_CLAUSE (clause, offset))
1232 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1234 if (MONO_OFFSET_IN_FILTER (clause, offset))
1241 * in_any_exception_block:
1243 * Returns TRUE is @offset is part of any exception clause (filter, handler, catch, finally or fault).
1246 in_any_exception_block (MonoMethodHeader *header, guint offset)
1249 MonoExceptionClause *clause;
1251 for (i = 0; i < header->num_clauses; ++i) {
1252 clause = &header->clauses [i];
1253 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1255 if (MONO_OFFSET_IN_FILTER (clause, offset))
1262 * is_valid_branch_instruction:
1264 * Verify if it's valid to perform a branch from @offset to @target.
1265 * This should be used with br and brtrue/false.
1266 * It returns 0 if valid, 1 for unverifiable and 2 for invalid.
1267 * The major difference from other similiar functions is that branching into a
1268 * finally/fault block is invalid instead of just unverifiable.
1271 is_valid_branch_instruction (MonoMethodHeader *header, guint offset, guint target)
1274 MonoExceptionClause *clause;
1276 for (i = 0; i < header->num_clauses; ++i) {
1277 clause = &header->clauses [i];
1278 /*branching into a finally block is invalid*/
1279 if ((clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY || clause->flags == MONO_EXCEPTION_CLAUSE_FAULT) &&
1280 !MONO_OFFSET_IN_HANDLER (clause, offset) &&
1281 MONO_OFFSET_IN_HANDLER (clause, target))
1284 if (clause->try_offset != target && (MONO_OFFSET_IN_CLAUSE (clause, offset) ^ MONO_OFFSET_IN_CLAUSE (clause, target)))
1286 if (MONO_OFFSET_IN_HANDLER (clause, offset) ^ MONO_OFFSET_IN_HANDLER (clause, target))
1288 if (MONO_OFFSET_IN_FILTER (clause, offset) ^ MONO_OFFSET_IN_FILTER (clause, target))
1295 * is_valid_cmp_branch_instruction:
1297 * Verify if it's valid to perform a branch from @offset to @target.
1298 * This should be used with binary comparison branching instruction, like beq, bge and similars.
1299 * It returns 0 if valid, 1 for unverifiable and 2 for invalid.
1301 * The major differences from other similar functions are that most errors lead to invalid
1302 * code and only branching out of finally, filter or fault clauses is unverifiable.
1305 is_valid_cmp_branch_instruction (MonoMethodHeader *header, guint offset, guint target)
1308 MonoExceptionClause *clause;
1310 for (i = 0; i < header->num_clauses; ++i) {
1311 clause = &header->clauses [i];
1312 /*branching out of a handler or finally*/
1313 if (clause->flags != MONO_EXCEPTION_CLAUSE_NONE &&
1314 MONO_OFFSET_IN_HANDLER (clause, offset) &&
1315 !MONO_OFFSET_IN_HANDLER (clause, target))
1318 if (clause->try_offset != target && (MONO_OFFSET_IN_CLAUSE (clause, offset) ^ MONO_OFFSET_IN_CLAUSE (clause, target)))
1320 if (MONO_OFFSET_IN_HANDLER (clause, offset) ^ MONO_OFFSET_IN_HANDLER (clause, target))
1322 if (MONO_OFFSET_IN_FILTER (clause, offset) ^ MONO_OFFSET_IN_FILTER (clause, target))
1329 * A leave can't escape a finally block
1332 is_correct_leave (MonoMethodHeader *header, guint offset, guint target)
1335 MonoExceptionClause *clause;
1337 for (i = 0; i < header->num_clauses; ++i) {
1338 clause = &header->clauses [i];
1339 if (clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY && MONO_OFFSET_IN_HANDLER (clause, offset) && !MONO_OFFSET_IN_HANDLER (clause, target))
1341 if (MONO_OFFSET_IN_FILTER (clause, offset))
1348 * A rethrow can't happen outside of a catch handler.
1351 is_correct_rethrow (MonoMethodHeader *header, guint offset)
1354 MonoExceptionClause *clause;
1356 for (i = 0; i < header->num_clauses; ++i) {
1357 clause = &header->clauses [i];
1358 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1365 * An endfinally can't happen outside of a finally/fault handler.
1368 is_correct_endfinally (MonoMethodHeader *header, guint offset)
1371 MonoExceptionClause *clause;
1373 for (i = 0; i < header->num_clauses; ++i) {
1374 clause = &header->clauses [i];
1375 if (MONO_OFFSET_IN_HANDLER (clause, offset) && (clause->flags == MONO_EXCEPTION_CLAUSE_FAULT || clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY))
1383 * An endfilter can only happens inside a filter clause.
1384 * In non-strict mode filter is allowed inside the handler clause too
1386 static MonoExceptionClause *
1387 is_correct_endfilter (VerifyContext *ctx, guint offset)
1390 MonoExceptionClause *clause;
1392 for (i = 0; i < ctx->header->num_clauses; ++i) {
1393 clause = &ctx->header->clauses [i];
1394 if (clause->flags != MONO_EXCEPTION_CLAUSE_FILTER)
1396 if (MONO_OFFSET_IN_FILTER (clause, offset))
1398 if (!IS_STRICT_MODE (ctx) && MONO_OFFSET_IN_HANDLER (clause, offset))
1406 * Non-strict endfilter can happens inside a try block or any handler block
1409 is_unverifiable_endfilter (VerifyContext *ctx, guint offset)
1412 MonoExceptionClause *clause;
1414 for (i = 0; i < ctx->header->num_clauses; ++i) {
1415 clause = &ctx->header->clauses [i];
1416 if (MONO_OFFSET_IN_CLAUSE (clause, offset))
1423 is_valid_bool_arg (ILStackDesc *arg)
1425 if (stack_slot_is_managed_pointer (arg) || stack_slot_is_boxed_value (arg) || stack_slot_is_null_literal (arg))
1429 switch (stack_slot_get_underlying_type (arg)) {
1432 case TYPE_NATIVE_INT:
1436 g_assert (arg->type);
1437 switch (arg->type->type) {
1438 case MONO_TYPE_CLASS:
1439 case MONO_TYPE_STRING:
1440 case MONO_TYPE_OBJECT:
1441 case MONO_TYPE_SZARRAY:
1442 case MONO_TYPE_ARRAY:
1443 case MONO_TYPE_FNPTR:
1446 case MONO_TYPE_GENERICINST:
1447 /*We need to check if the container class
1448 * of the generic type is a valuetype, iow:
1449 * is it a "class Foo<T>" or a "struct Foo<T>"?
1451 return !arg->type->data.generic_class->container_class->valuetype;
1459 /*Type manipulation helper*/
1461 /*Returns the byref version of the supplied MonoType*/
1463 mono_type_get_type_byref (MonoType *type)
1467 return &mono_class_from_mono_type (type)->this_arg;
1471 /*Returns the byval version of the supplied MonoType*/
1473 mono_type_get_type_byval (MonoType *type)
1477 return &mono_class_from_mono_type (type)->byval_arg;
1481 mono_type_from_stack_slot (ILStackDesc *slot)
1483 if (stack_slot_is_managed_pointer (slot))
1484 return mono_type_get_type_byref (slot->type);
1488 /*Stack manipulation code*/
1491 ensure_stack_size (ILCodeDesc *stack, int required)
1496 if (required < stack->max_size)
1499 /* We don't have to worry about the exponential growth since stack_copy prune unused space */
1500 new_size = MAX (8, MAX (required, stack->max_size * 2));
1502 g_assert (new_size >= stack->size);
1503 g_assert (new_size >= required);
1505 tmp = g_new0 (ILStackDesc, new_size);
1506 _MEM_ALLOC (sizeof (ILStackDesc) * new_size);
1510 memcpy (tmp, stack->stack, stack->size * sizeof (ILStackDesc));
1511 g_free (stack->stack);
1512 _MEM_FREE (sizeof (ILStackDesc) * stack->max_size);
1516 stack->max_size = new_size;
1520 stack_init (VerifyContext *ctx, ILCodeDesc *state)
1522 if (state->flags & IL_CODE_FLAG_STACK_INITED)
1524 state->size = state->max_size = 0;
1525 state->flags |= IL_CODE_FLAG_STACK_INITED;
1529 stack_copy (ILCodeDesc *to, ILCodeDesc *from)
1531 ensure_stack_size (to, from->size);
1532 to->size = from->size;
1534 /*stack copy happens at merge points, which have small stacks*/
1536 memcpy (to->stack, from->stack, sizeof (ILStackDesc) * from->size);
1540 copy_stack_value (ILStackDesc *to, ILStackDesc *from)
1542 to->stype = from->stype;
1543 to->type = from->type;
1544 to->method = from->method;
1548 check_underflow (VerifyContext *ctx, int size)
1550 if (ctx->eval.size < size) {
1551 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack underflow, required %d, but have %d at 0x%04x", size, ctx->eval.size, ctx->ip_offset));
1558 check_overflow (VerifyContext *ctx)
1560 if (ctx->eval.size >= ctx->max_stack) {
1561 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have stack-depth %d at 0x%04x", ctx->eval.size + 1, ctx->ip_offset));
1567 /*This reject out PTR, FNPTR and TYPEDBYREF*/
1569 check_unmanaged_pointer (VerifyContext *ctx, ILStackDesc *value)
1571 if (stack_slot_get_type (value) == TYPE_PTR) {
1572 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unmanaged pointer is not a verifiable type at 0x%04x", ctx->ip_offset));
1578 /*TODO verify if MONO_TYPE_TYPEDBYREF is not allowed here as well.*/
1580 check_unverifiable_type (VerifyContext *ctx, MonoType *type)
1582 if (type->type == MONO_TYPE_PTR || type->type == MONO_TYPE_FNPTR) {
1583 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unmanaged pointer is not a verifiable type at 0x%04x", ctx->ip_offset));
1589 static ILStackDesc *
1590 stack_push (VerifyContext *ctx)
1592 g_assert (ctx->eval.size < ctx->max_stack);
1593 g_assert (ctx->eval.size <= ctx->eval.max_size);
1595 ensure_stack_size (&ctx->eval, ctx->eval.size + 1);
1597 return & ctx->eval.stack [ctx->eval.size++];
1600 static ILStackDesc *
1601 stack_push_val (VerifyContext *ctx, int stype, MonoType *type)
1603 ILStackDesc *top = stack_push (ctx);
1609 static ILStackDesc *
1610 stack_pop (VerifyContext *ctx)
1613 g_assert (ctx->eval.size > 0);
1614 ret = ctx->eval.stack + --ctx->eval.size;
1615 if ((ret->stype & UNINIT_THIS_MASK) == UNINIT_THIS_MASK)
1616 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Found use of uninitialized 'this ptr' ref at 0x%04x", ctx->ip_offset));
1620 /* This function allows to safely pop an unititialized this ptr from
1621 * the eval stack without marking the method as unverifiable.
1623 static ILStackDesc *
1624 stack_pop_safe (VerifyContext *ctx)
1626 g_assert (ctx->eval.size > 0);
1627 return ctx->eval.stack + --ctx->eval.size;
1630 /*Positive number distance from stack top. [0] is stack top, [1] is the one below*/
1632 stack_peek (VerifyContext *ctx, int distance)
1634 g_assert (ctx->eval.size - distance > 0);
1635 return ctx->eval.stack + (ctx->eval.size - 1 - distance);
1638 static ILStackDesc *
1639 stack_push_stack_val (VerifyContext *ctx, ILStackDesc *value)
1641 ILStackDesc *top = stack_push (ctx);
1642 copy_stack_value (top, value);
1646 /* Returns the MonoType associated with the token, or NULL if it is invalid.
1648 * A boxable type can be either a reference or value type, but cannot be a byref type or an unmanaged pointer
1651 get_boxable_mono_type (VerifyContext* ctx, int token, const char *opcode)
1656 if (!(type = verifier_load_type (ctx, token, opcode)))
1659 if (type->byref && type->type != MONO_TYPE_TYPEDBYREF) {
1660 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of byref type for %s at 0x%04x", opcode, ctx->ip_offset));
1664 if (type->type == MONO_TYPE_VOID) {
1665 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of void type for %s at 0x%04x", opcode, ctx->ip_offset));
1669 if (type->type == MONO_TYPE_TYPEDBYREF)
1670 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid use of typedbyref for %s at 0x%04x", opcode, ctx->ip_offset));
1672 if (!(class = mono_class_from_mono_type (type)))
1673 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Could not retrieve type token for %s at 0x%04x", opcode, ctx->ip_offset));
1675 if (class->generic_container && type->type != MONO_TYPE_GENERICINST)
1676 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));
1678 check_unverifiable_type (ctx, type);
1683 /*operation result tables */
1685 static const unsigned char bin_op_table [TYPE_MAX][TYPE_MAX] = {
1686 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1687 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1688 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1689 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
1690 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1691 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1694 static const unsigned char add_table [TYPE_MAX][TYPE_MAX] = {
1695 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1696 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1697 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1698 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
1699 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_INV, TYPE_INV},
1700 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1703 static const unsigned char sub_table [TYPE_MAX][TYPE_MAX] = {
1704 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1705 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1706 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1707 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
1708 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_NATIVE_INT | NON_VERIFIABLE_RESULT, TYPE_INV},
1709 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1712 static const unsigned char int_bin_op_table [TYPE_MAX][TYPE_MAX] = {
1713 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1714 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1715 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1716 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1717 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1718 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1721 static const unsigned char shift_op_table [TYPE_MAX][TYPE_MAX] = {
1722 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1723 {TYPE_I8, TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV},
1724 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1725 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1726 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1727 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1730 static const unsigned char cmp_br_op [TYPE_MAX][TYPE_MAX] = {
1731 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1732 {TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1733 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1734 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV},
1735 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV},
1736 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1739 static const unsigned char cmp_br_eq_op [TYPE_MAX][TYPE_MAX] = {
1740 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1741 {TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1742 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_I4 | NON_VERIFIABLE_RESULT, TYPE_INV},
1743 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV},
1744 {TYPE_INV, TYPE_INV, TYPE_I4 | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_I4, TYPE_INV},
1745 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4},
1748 static const unsigned char add_ovf_un_table [TYPE_MAX][TYPE_MAX] = {
1749 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1750 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1751 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1752 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1753 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_INV, TYPE_INV},
1754 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1757 static const unsigned char sub_ovf_un_table [TYPE_MAX][TYPE_MAX] = {
1758 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1759 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1760 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1761 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1762 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_NATIVE_INT | NON_VERIFIABLE_RESULT, TYPE_INV},
1763 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1766 static const unsigned char bin_ovf_table [TYPE_MAX][TYPE_MAX] = {
1767 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1768 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1769 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1770 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1771 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1772 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1775 #ifdef MONO_VERIFIER_DEBUG
1779 dump_stack_value (ILStackDesc *value)
1781 printf ("[(%x)(%x)", value->type->type, value->stype);
1783 if (stack_slot_is_this_pointer (value))
1786 if (stack_slot_is_boxed_value (value))
1787 printf ("[boxed] ");
1789 if (stack_slot_is_null_literal (value))
1792 if (stack_slot_is_managed_mutability_pointer (value))
1793 printf ("Controled Mutability MP: ");
1795 if (stack_slot_is_managed_pointer (value))
1796 printf ("Managed Pointer to: ");
1798 switch (stack_slot_get_underlying_type (value)) {
1800 printf ("invalid type]");
1808 case TYPE_NATIVE_INT:
1809 printf ("native int]");
1812 printf ("float64]");
1815 printf ("unmanaged pointer]");
1818 switch (value->type->type) {
1819 case MONO_TYPE_CLASS:
1820 case MONO_TYPE_VALUETYPE:
1821 printf ("complex] (%s)", value->type->data.klass->name);
1823 case MONO_TYPE_STRING:
1824 printf ("complex] (string)");
1826 case MONO_TYPE_OBJECT:
1827 printf ("complex] (object)");
1829 case MONO_TYPE_SZARRAY:
1830 printf ("complex] (%s [])", value->type->data.klass->name);
1832 case MONO_TYPE_ARRAY:
1833 printf ("complex] (%s [%d %d %d])",
1834 value->type->data.array->eklass->name,
1835 value->type->data.array->rank,
1836 value->type->data.array->numsizes,
1837 value->type->data.array->numlobounds);
1839 case MONO_TYPE_GENERICINST:
1840 printf ("complex] (inst of %s )", value->type->data.generic_class->container_class->name);
1843 printf ("complex] (type generic param !%d - %s) ", value->type->data.generic_param->num, mono_generic_param_info (value->type->data.generic_param)->name);
1845 case MONO_TYPE_MVAR:
1846 printf ("complex] (method generic param !!%d - %s) ", value->type->data.generic_param->num, mono_generic_param_info (value->type->data.generic_param)->name);
1849 //should be a boxed value
1850 char * name = mono_type_full_name (value->type);
1851 printf ("complex] %s", name);
1857 printf ("unknown stack %x type]\n", value->stype);
1858 g_assert_not_reached ();
1863 dump_stack_state (ILCodeDesc *state)
1867 printf ("(%d) ", state->size);
1868 for (i = 0; i < state->size; ++i)
1869 dump_stack_value (state->stack + i);
1874 /*Returns TRUE if candidate array type can be assigned to target.
1875 *Both parameters MUST be of type MONO_TYPE_ARRAY (target->type == MONO_TYPE_ARRAY)
1878 is_array_type_compatible (MonoType *target, MonoType *candidate)
1880 MonoArrayType *left = target->data.array;
1881 MonoArrayType *right = candidate->data.array;
1883 g_assert (target->type == MONO_TYPE_ARRAY);
1884 g_assert (candidate->type == MONO_TYPE_ARRAY);
1886 if (left->rank != right->rank)
1889 return verifier_class_is_assignable_from (left->eklass, right->eklass);
1893 get_stack_type (MonoType *type)
1896 int type_kind = type->type;
1898 mask = POINTER_MASK;
1899 /*TODO handle CMMP_MASK */
1902 switch (type_kind) {
1905 case MONO_TYPE_BOOLEAN:
1908 case MONO_TYPE_CHAR:
1911 return TYPE_I4 | mask;
1915 return TYPE_NATIVE_INT | mask;
1917 /* FIXME: the spec says that you cannot have a pointer to method pointer, do we need to check this here? */
1918 case MONO_TYPE_FNPTR:
1920 case MONO_TYPE_TYPEDBYREF:
1921 return TYPE_PTR | mask;
1924 case MONO_TYPE_MVAR:
1926 case MONO_TYPE_CLASS:
1927 case MONO_TYPE_STRING:
1928 case MONO_TYPE_OBJECT:
1929 case MONO_TYPE_SZARRAY:
1930 case MONO_TYPE_ARRAY:
1931 return TYPE_COMPLEX | mask;
1935 return TYPE_I8 | mask;
1939 return TYPE_R8 | mask;
1941 case MONO_TYPE_GENERICINST:
1942 case MONO_TYPE_VALUETYPE:
1943 if (mono_type_is_enum_type (type)) {
1944 type = mono_type_get_underlying_type_any (type);
1947 type_kind = type->type;
1950 return TYPE_COMPLEX | mask;
1958 /* convert MonoType to ILStackDesc format (stype) */
1960 set_stack_value (VerifyContext *ctx, ILStackDesc *stack, MonoType *type, int take_addr)
1963 int type_kind = type->type;
1965 if (type->byref || take_addr)
1966 mask = POINTER_MASK;
1967 /* TODO handle CMMP_MASK */
1972 switch (type_kind) {
1975 case MONO_TYPE_BOOLEAN:
1978 case MONO_TYPE_CHAR:
1981 stack->stype = TYPE_I4 | mask;
1985 stack->stype = TYPE_NATIVE_INT | mask;
1988 /*FIXME: Do we need to check if it's a pointer to the method pointer? The spec says it' illegal to have that.*/
1989 case MONO_TYPE_FNPTR:
1991 case MONO_TYPE_TYPEDBYREF:
1992 stack->stype = TYPE_PTR | mask;
1995 case MONO_TYPE_CLASS:
1996 case MONO_TYPE_STRING:
1997 case MONO_TYPE_OBJECT:
1998 case MONO_TYPE_SZARRAY:
1999 case MONO_TYPE_ARRAY:
2002 case MONO_TYPE_MVAR:
2003 stack->stype = TYPE_COMPLEX | mask;
2008 stack->stype = TYPE_I8 | mask;
2012 stack->stype = TYPE_R8 | mask;
2014 case MONO_TYPE_GENERICINST:
2015 case MONO_TYPE_VALUETYPE:
2016 if (mono_type_is_enum_type (type)) {
2017 MonoType *utype = mono_type_get_underlying_type_any (type);
2019 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Could not resolve underlying type of %x at %d", type->type, ctx->ip_offset));
2023 type_kind = type->type;
2026 stack->stype = TYPE_COMPLEX | mask;
2030 VERIFIER_DEBUG ( printf ("unknown type 0x%02x in eval stack type\n", type->type); );
2031 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Illegal value set on stack 0x%02x at %d", type->type, ctx->ip_offset));
2038 * init_stack_with_value_at_exception_boundary:
2040 * Initialize the stack and push a given type.
2041 * The instruction is marked as been on the exception boundary.
2044 init_stack_with_value_at_exception_boundary (VerifyContext *ctx, ILCodeDesc *code, MonoClass *klass)
2047 MonoType *type = mono_class_inflate_generic_type_checked (&klass->byval_arg, ctx->generic_context, &error);
2049 if (!mono_error_ok (&error)) {
2050 char *name = mono_type_get_full_name (klass);
2051 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid class %s used for exception", name));
2053 mono_error_cleanup (&error);
2057 if (!ctx->max_stack) {
2058 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack overflow at 0x%04x", ctx->ip_offset));
2062 stack_init (ctx, code);
2063 ensure_stack_size (code, 1);
2064 set_stack_value (ctx, code->stack, type, FALSE);
2065 ctx->exception_types = g_slist_prepend (ctx->exception_types, type);
2067 code->flags |= IL_CODE_FLAG_WAS_TARGET;
2068 if (mono_type_is_generic_argument (type))
2069 code->stack->stype |= BOXED_MASK;
2073 get_ienumerable_class (void)
2075 static MonoClass* generic_ienumerable_class = NULL;
2077 if (generic_ienumerable_class == NULL)
2078 generic_ienumerable_class = mono_class_from_name (mono_defaults.corlib,
2079 "System.Collections.Generic", "IEnumerable`1");
2080 return generic_ienumerable_class;
2084 get_icollection_class (void)
2086 static MonoClass* generic_icollection_class = NULL;
2088 if (generic_icollection_class == NULL)
2089 generic_icollection_class = mono_class_from_name (mono_defaults.corlib,
2090 "System.Collections.Generic", "ICollection`1");
2091 return generic_icollection_class;
2095 get_ireadonlylist_class (void)
2097 static MonoClass* generic_ireadonlylist_class = NULL;
2099 if (generic_ireadonlylist_class == NULL)
2100 generic_ireadonlylist_class = mono_class_from_name (mono_defaults.corlib,
2101 "System.Collections.Generic", "IReadOnlyList`1");
2102 return generic_ireadonlylist_class;
2106 get_ireadonlycollection_class (void)
2108 static MonoClass* generic_ireadonlycollection_class = NULL;
2110 if (generic_ireadonlycollection_class == NULL)
2111 generic_ireadonlycollection_class = mono_class_from_name (mono_defaults.corlib,
2112 "System.Collections.Generic", "IReadOnlyCollection`1");
2113 return generic_ireadonlycollection_class;
2117 inflate_class_one_arg (MonoClass *gtype, MonoClass *arg0)
2120 args [0] = &arg0->byval_arg;
2122 return mono_class_bind_generic_parameters (gtype, 1, args, FALSE);
2126 verifier_inflate_and_check_compat (MonoClass *target, MonoClass *gtd, MonoClass *arg)
2129 if (!(tmp = inflate_class_one_arg (gtd, arg)))
2131 if (mono_class_is_variant_compatible (target, tmp, TRUE))
2137 verifier_class_is_assignable_from (MonoClass *target, MonoClass *candidate)
2139 MonoClass *iface_gtd;
2141 if (target == candidate)
2144 if (mono_class_has_variant_generic_params (target)) {
2145 if (MONO_CLASS_IS_INTERFACE (target)) {
2146 if (MONO_CLASS_IS_INTERFACE (candidate) && mono_class_is_variant_compatible (target, candidate, TRUE))
2149 if (candidate->rank == 1) {
2150 if (verifier_inflate_and_check_compat (target, mono_defaults.generic_ilist_class, candidate->element_class))
2152 if (verifier_inflate_and_check_compat (target, get_icollection_class (), candidate->element_class))
2154 if (verifier_inflate_and_check_compat (target, get_ienumerable_class (), candidate->element_class))
2156 if (verifier_inflate_and_check_compat (target, get_ireadonlylist_class (), candidate->element_class))
2158 if (verifier_inflate_and_check_compat (target, get_ireadonlycollection_class (), candidate->element_class))
2163 while (candidate && candidate != mono_defaults.object_class) {
2164 mono_class_setup_interfaces (candidate, &error);
2165 if (!mono_error_ok (&error)) {
2166 mono_error_cleanup (&error);
2170 /*klass is a generic variant interface, We need to extract from oklass a list of ifaces which are viable candidates.*/
2171 for (i = 0; i < candidate->interface_offsets_count; ++i) {
2172 MonoClass *iface = candidate->interfaces_packed [i];
2173 if (mono_class_is_variant_compatible (target, iface, TRUE))
2177 for (i = 0; i < candidate->interface_count; ++i) {
2178 MonoClass *iface = candidate->interfaces [i];
2179 if (mono_class_is_variant_compatible (target, iface, TRUE))
2182 candidate = candidate->parent;
2185 } else if (target->delegate) {
2186 if (mono_class_is_variant_compatible (target, candidate, TRUE))
2192 if (mono_class_is_assignable_from (target, candidate))
2195 if (!MONO_CLASS_IS_INTERFACE (target) || !target->generic_class || candidate->rank != 1)
2198 iface_gtd = target->generic_class->container_class;
2199 if (iface_gtd != mono_defaults.generic_ilist_class && iface_gtd != get_icollection_class () && iface_gtd != get_ienumerable_class ())
2202 target = mono_class_from_mono_type (target->generic_class->context.class_inst->type_argv [0]);
2203 candidate = candidate->element_class;
2208 /*Verify if type 'candidate' can be stored in type 'target'.
2210 * If strict, check for the underlying type and not the verification stack types
2213 verify_type_compatibility_full (VerifyContext *ctx, MonoType *target, MonoType *candidate, gboolean strict)
2215 #define IS_ONE_OF3(T, A, B, C) (T == A || T == B || T == C)
2216 #define IS_ONE_OF2(T, A, B) (T == A || T == B)
2218 MonoType *original_candidate = candidate;
2219 VERIFIER_DEBUG ( printf ("checking type compatibility %s x %s strict %d\n", mono_type_full_name (target), mono_type_full_name (candidate), strict); );
2221 /*only one is byref */
2222 if (candidate->byref ^ target->byref) {
2223 /* converting from native int to byref*/
2224 if (get_stack_type (candidate) == TYPE_NATIVE_INT && target->byref) {
2225 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("using byref native int at 0x%04x", ctx->ip_offset));
2230 strict |= target->byref;
2231 /*From now on we don't care about byref anymore, so it's ok to discard it here*/
2232 candidate = mono_type_get_underlying_type_any (candidate);
2235 switch (target->type) {
2236 case MONO_TYPE_VOID:
2237 return candidate->type == MONO_TYPE_VOID;
2240 case MONO_TYPE_BOOLEAN:
2242 return IS_ONE_OF3 (candidate->type, MONO_TYPE_I1, MONO_TYPE_U1, MONO_TYPE_BOOLEAN);
2245 case MONO_TYPE_CHAR:
2247 return IS_ONE_OF3 (candidate->type, MONO_TYPE_I2, MONO_TYPE_U2, MONO_TYPE_CHAR);
2249 case MONO_TYPE_U4: {
2250 gboolean is_native_int = IS_ONE_OF2 (candidate->type, MONO_TYPE_I, MONO_TYPE_U);
2251 gboolean is_int4 = IS_ONE_OF2 (candidate->type, MONO_TYPE_I4, MONO_TYPE_U4);
2253 return is_native_int || is_int4;
2254 return is_native_int || get_stack_type (candidate) == TYPE_I4;
2259 return IS_ONE_OF2 (candidate->type, MONO_TYPE_I8, MONO_TYPE_U8);
2264 return candidate->type == target->type;
2265 return IS_ONE_OF2 (candidate->type, MONO_TYPE_R4, MONO_TYPE_R8);
2269 gboolean is_native_int = IS_ONE_OF2 (candidate->type, MONO_TYPE_I, MONO_TYPE_U);
2270 gboolean is_int4 = IS_ONE_OF2 (candidate->type, MONO_TYPE_I4, MONO_TYPE_U4);
2272 return is_native_int || is_int4;
2273 return is_native_int || get_stack_type (candidate) == TYPE_I4;
2277 if (candidate->type != MONO_TYPE_PTR)
2279 /* check the underlying type */
2280 return verify_type_compatibility_full (ctx, target->data.type, candidate->data.type, TRUE);
2282 case MONO_TYPE_FNPTR: {
2283 MonoMethodSignature *left, *right;
2284 if (candidate->type != MONO_TYPE_FNPTR)
2287 left = mono_type_get_signature (target);
2288 right = mono_type_get_signature (candidate);
2289 return mono_metadata_signature_equal (left, right) && left->call_convention == right->call_convention;
2292 case MONO_TYPE_GENERICINST: {
2293 MonoClass *target_klass;
2294 MonoClass *candidate_klass;
2295 if (mono_type_is_enum_type (target)) {
2296 target = mono_type_get_underlying_type_any (target);
2302 * VAR / MVAR compatibility must be checked by verify_stack_type_compatibility
2303 * to take boxing status into account.
2305 if (mono_type_is_generic_argument (original_candidate))
2308 target_klass = mono_class_from_mono_type (target);
2309 candidate_klass = mono_class_from_mono_type (candidate);
2310 if (mono_class_is_nullable (target_klass)) {
2311 if (!mono_class_is_nullable (candidate_klass))
2313 return target_klass == candidate_klass;
2315 return verifier_class_is_assignable_from (target_klass, candidate_klass);
2318 case MONO_TYPE_STRING:
2319 return candidate->type == MONO_TYPE_STRING;
2321 case MONO_TYPE_CLASS:
2323 * VAR / MVAR compatibility must be checked by verify_stack_type_compatibility
2324 * to take boxing status into account.
2326 if (mono_type_is_generic_argument (original_candidate))
2329 if (candidate->type == MONO_TYPE_VALUETYPE)
2332 /* If candidate is an enum it should return true for System.Enum and supertypes.
2333 * That's why here we use the original type and not the underlying type.
2335 return verifier_class_is_assignable_from (target->data.klass, mono_class_from_mono_type (original_candidate));
2337 case MONO_TYPE_OBJECT:
2338 return MONO_TYPE_IS_REFERENCE (candidate);
2340 case MONO_TYPE_SZARRAY: {
2343 if (candidate->type != MONO_TYPE_SZARRAY)
2346 left = mono_class_from_mono_type (target);
2347 right = mono_class_from_mono_type (candidate);
2349 return verifier_class_is_assignable_from (left, right);
2352 case MONO_TYPE_ARRAY:
2353 if (candidate->type != MONO_TYPE_ARRAY)
2355 return is_array_type_compatible (target, candidate);
2357 case MONO_TYPE_TYPEDBYREF:
2358 return candidate->type == MONO_TYPE_TYPEDBYREF;
2360 case MONO_TYPE_VALUETYPE: {
2361 MonoClass *target_klass;
2362 MonoClass *candidate_klass;
2364 if (candidate->type == MONO_TYPE_CLASS)
2367 target_klass = mono_class_from_mono_type (target);
2368 candidate_klass = mono_class_from_mono_type (candidate);
2369 if (target_klass == candidate_klass)
2371 if (mono_type_is_enum_type (target)) {
2372 target = mono_type_get_underlying_type_any (target);
2381 if (candidate->type != MONO_TYPE_VAR)
2383 return mono_type_get_generic_param_num (candidate) == mono_type_get_generic_param_num (target);
2385 case MONO_TYPE_MVAR:
2386 if (candidate->type != MONO_TYPE_MVAR)
2388 return mono_type_get_generic_param_num (candidate) == mono_type_get_generic_param_num (target);
2391 VERIFIER_DEBUG ( printf ("unknown store type %d\n", target->type); );
2392 g_assert_not_reached ();
2401 verify_type_compatibility (VerifyContext *ctx, MonoType *target, MonoType *candidate)
2403 return verify_type_compatibility_full (ctx, target, candidate, FALSE);
2407 * Returns the generic param bound to the context been verified.
2410 static MonoGenericParam*
2411 get_generic_param (VerifyContext *ctx, MonoType *param)
2413 guint16 param_num = mono_type_get_generic_param_num (param);
2414 if (param->type == MONO_TYPE_VAR) {
2415 if (!ctx->generic_context->class_inst || ctx->generic_context->class_inst->type_argc <= param_num) {
2416 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid generic type argument %d", param_num));
2419 return ctx->generic_context->class_inst->type_argv [param_num]->data.generic_param;
2422 /*param must be a MVAR */
2423 if (!ctx->generic_context->method_inst || ctx->generic_context->method_inst->type_argc <= param_num) {
2424 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid generic method argument %d", param_num));
2427 return ctx->generic_context->method_inst->type_argv [param_num]->data.generic_param;
2432 recursive_boxed_constraint_type_check (VerifyContext *ctx, MonoType *type, MonoClass *constraint_class, int recursion_level)
2434 MonoType *constraint_type = &constraint_class->byval_arg;
2435 if (recursion_level <= 0)
2438 if (verify_type_compatibility_full (ctx, type, mono_type_get_type_byval (constraint_type), FALSE))
2441 if (mono_type_is_generic_argument (constraint_type)) {
2442 MonoGenericParam *param = get_generic_param (ctx, constraint_type);
2446 for (class = mono_generic_param_info (param)->constraints; class && *class; ++class) {
2447 if (recursive_boxed_constraint_type_check (ctx, type, *class, recursion_level - 1))
2455 * is_compatible_boxed_valuetype:
2457 * Returns TRUE if @candidate / @stack is a valid boxed valuetype.
2459 * @type The source type. It it tested to be of the proper type.
2460 * @candidate type of the boxed valuetype.
2461 * @stack stack slot of the boxed valuetype, separate from @candidade since one could be changed before calling this function
2462 * @strict if TRUE candidate must be boxed compatible to the target type
2466 is_compatible_boxed_valuetype (VerifyContext *ctx, MonoType *type, MonoType *candidate, ILStackDesc *stack, gboolean strict)
2468 if (!stack_slot_is_boxed_value (stack))
2470 if (type->byref || candidate->byref)
2473 if (mono_type_is_generic_argument (candidate)) {
2474 MonoGenericParam *param = get_generic_param (ctx, candidate);
2479 for (class = mono_generic_param_info (param)->constraints; class && *class; ++class) {
2480 /*256 should be enough since there can't be more than 255 generic arguments.*/
2481 if (recursive_boxed_constraint_type_check (ctx, type, *class, 256))
2486 if (mono_type_is_generic_argument (type))
2492 return MONO_TYPE_IS_REFERENCE (type) && verifier_class_is_assignable_from (mono_class_from_mono_type (type), mono_class_from_mono_type (candidate));
2496 verify_stack_type_compatibility_full (VerifyContext *ctx, MonoType *type, ILStackDesc *stack, gboolean drop_byref, gboolean valuetype_must_be_boxed)
2498 MonoType *candidate = mono_type_from_stack_slot (stack);
2499 if (MONO_TYPE_IS_REFERENCE (type) && !type->byref && stack_slot_is_null_literal (stack))
2502 if (is_compatible_boxed_valuetype (ctx, type, candidate, stack, TRUE))
2505 if (valuetype_must_be_boxed && !stack_slot_is_boxed_value (stack) && !MONO_TYPE_IS_REFERENCE (candidate))
2508 if (!valuetype_must_be_boxed && stack_slot_is_boxed_value (stack))
2512 return verify_type_compatibility_full (ctx, type, mono_type_get_type_byval (candidate), FALSE);
2514 return verify_type_compatibility_full (ctx, type, candidate, FALSE);
2518 verify_stack_type_compatibility (VerifyContext *ctx, MonoType *type, ILStackDesc *stack)
2520 return verify_stack_type_compatibility_full (ctx, type, stack, FALSE, FALSE);
2524 mono_delegate_type_equal (MonoType *target, MonoType *candidate)
2526 if (candidate->byref ^ target->byref)
2529 switch (target->type) {
2530 case MONO_TYPE_VOID:
2533 case MONO_TYPE_BOOLEAN:
2536 case MONO_TYPE_CHAR:
2545 case MONO_TYPE_STRING:
2546 case MONO_TYPE_TYPEDBYREF:
2547 return candidate->type == target->type;
2550 if (candidate->type != MONO_TYPE_PTR)
2552 return mono_delegate_type_equal (target->data.type, candidate->data.type);
2554 case MONO_TYPE_FNPTR:
2555 if (candidate->type != MONO_TYPE_FNPTR)
2557 return mono_delegate_signature_equal (mono_type_get_signature (target), mono_type_get_signature (candidate), FALSE);
2559 case MONO_TYPE_GENERICINST: {
2560 MonoClass *target_klass;
2561 MonoClass *candidate_klass;
2562 target_klass = mono_class_from_mono_type (target);
2563 candidate_klass = mono_class_from_mono_type (candidate);
2564 /*FIXME handle nullables and enum*/
2565 return verifier_class_is_assignable_from (target_klass, candidate_klass);
2567 case MONO_TYPE_OBJECT:
2568 return MONO_TYPE_IS_REFERENCE (candidate);
2570 case MONO_TYPE_CLASS:
2571 return verifier_class_is_assignable_from(target->data.klass, mono_class_from_mono_type (candidate));
2573 case MONO_TYPE_SZARRAY:
2574 if (candidate->type != MONO_TYPE_SZARRAY)
2576 return verifier_class_is_assignable_from (mono_class_from_mono_type (target)->element_class, mono_class_from_mono_type (candidate)->element_class);
2578 case MONO_TYPE_ARRAY:
2579 if (candidate->type != MONO_TYPE_ARRAY)
2581 return is_array_type_compatible (target, candidate);
2583 case MONO_TYPE_VALUETYPE:
2584 /*FIXME handle nullables and enum*/
2585 return mono_class_from_mono_type (candidate) == mono_class_from_mono_type (target);
2588 return candidate->type == MONO_TYPE_VAR && mono_type_get_generic_param_num (target) == mono_type_get_generic_param_num (candidate);
2591 case MONO_TYPE_MVAR:
2592 return candidate->type == MONO_TYPE_MVAR && mono_type_get_generic_param_num (target) == mono_type_get_generic_param_num (candidate);
2596 VERIFIER_DEBUG ( printf ("Unknown type %d. Implement me!\n", target->type); );
2597 g_assert_not_reached ();
2603 mono_delegate_param_equal (MonoType *delegate, MonoType *method)
2605 if (mono_metadata_type_equal_full (delegate, method, TRUE))
2608 return mono_delegate_type_equal (method, delegate);
2612 mono_delegate_ret_equal (MonoType *delegate, MonoType *method)
2614 if (mono_metadata_type_equal_full (delegate, method, TRUE))
2617 return mono_delegate_type_equal (delegate, method);
2621 * mono_delegate_signature_equal:
2623 * Compare two signatures in the way expected by delegates.
2625 * This function only exists due to the fact that it should ignore the 'has_this' part of the signature.
2627 * FIXME can this function be eliminated and proper metadata functionality be used?
2630 mono_delegate_signature_equal (MonoMethodSignature *delegate_sig, MonoMethodSignature *method_sig, gboolean is_static_ldftn)
2633 int method_offset = is_static_ldftn ? 1 : 0;
2635 if (delegate_sig->param_count + method_offset != method_sig->param_count)
2638 if (delegate_sig->call_convention != method_sig->call_convention)
2641 for (i = 0; i < delegate_sig->param_count; i++) {
2642 MonoType *p1 = delegate_sig->params [i];
2643 MonoType *p2 = method_sig->params [i + method_offset];
2645 if (!mono_delegate_param_equal (p1, p2))
2649 if (!mono_delegate_ret_equal (delegate_sig->ret, method_sig->ret))
2656 mono_verifier_is_signature_compatible (MonoMethodSignature *target, MonoMethodSignature *candidate)
2658 return mono_delegate_signature_equal (target, candidate, FALSE);
2662 * verify_ldftn_delegate:
2664 * Verify properties of ldftn based delegates.
2667 verify_ldftn_delegate (VerifyContext *ctx, MonoClass *delegate, ILStackDesc *value, ILStackDesc *funptr)
2669 MonoMethod *method = funptr->method;
2671 /*ldftn non-final virtuals only allowed if method is not static,
2672 * the object is a this arg (comes from a ldarg.0), and there is no starg.0.
2673 * This rules doesn't apply if the object on stack is a boxed valuetype.
2675 if ((method->flags & METHOD_ATTRIBUTE_VIRTUAL) && !(method->flags & METHOD_ATTRIBUTE_FINAL) && !(method->klass->flags & TYPE_ATTRIBUTE_SEALED) && !stack_slot_is_boxed_value (value)) {
2676 /*A stdarg 0 must not happen, we fail here only in fail fast mode to avoid double error reports*/
2677 if (IS_FAIL_FAST_MODE (ctx) && ctx->has_this_store)
2678 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid ldftn with virtual function in method with stdarg 0 at 0x%04x", ctx->ip_offset));
2680 /*current method must not be static*/
2681 if (ctx->method->flags & METHOD_ATTRIBUTE_STATIC)
2682 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid ldftn with virtual function at 0x%04x", ctx->ip_offset));
2684 /*value is the this pointer, loaded using ldarg.0 */
2685 if (!stack_slot_is_this_pointer (value))
2686 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));
2688 ctx->code [ctx->ip_offset].flags |= IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL;
2693 * verify_delegate_compatibility:
2695 * Verify delegate creation sequence.
2699 verify_delegate_compatibility (VerifyContext *ctx, MonoClass *delegate, ILStackDesc *value, ILStackDesc *funptr)
2701 #define IS_VALID_OPCODE(offset, opcode) (ip [ip_offset - offset] == opcode && (ctx->code [ip_offset - offset].flags & IL_CODE_FLAG_SEEN))
2702 #define IS_LOAD_FUN_PTR(kind) (IS_VALID_OPCODE (6, CEE_PREFIX1) && ip [ip_offset - 5] == kind)
2704 MonoMethod *invoke, *method;
2705 const guint8 *ip = ctx->header->code;
2706 guint32 ip_offset = ctx->ip_offset;
2707 gboolean is_static_ldftn = FALSE, is_first_arg_bound = FALSE;
2709 if (stack_slot_get_type (funptr) != TYPE_PTR || !funptr->method) {
2710 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid function pointer parameter for delegate constructor at 0x%04x", ctx->ip_offset));
2714 invoke = mono_get_delegate_invoke (delegate);
2715 method = funptr->method;
2717 if (!method || !mono_method_signature (method)) {
2718 char *name = mono_type_get_full_name (delegate);
2719 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid method on stack to create delegate %s construction at 0x%04x", name, ctx->ip_offset));
2724 if (!invoke || !mono_method_signature (invoke)) {
2725 char *name = mono_type_get_full_name (delegate);
2726 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Delegate type %s with bad Invoke method at 0x%04x", name, ctx->ip_offset));
2731 is_static_ldftn = (ip_offset > 5 && IS_LOAD_FUN_PTR (CEE_LDFTN)) && method->flags & METHOD_ATTRIBUTE_STATIC;
2733 if (is_static_ldftn)
2734 is_first_arg_bound = mono_method_signature (invoke)->param_count + 1 == mono_method_signature (method)->param_count;
2736 if (!mono_delegate_signature_equal (mono_method_signature (invoke), mono_method_signature (method), is_first_arg_bound)) {
2737 char *fun_sig = mono_signature_get_desc (mono_method_signature (method), FALSE);
2738 char *invoke_sig = mono_signature_get_desc (mono_method_signature (invoke), FALSE);
2739 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));
2741 g_free (invoke_sig);
2745 * Delegate code sequences:
2751 * [-6] ldvirtftn token
2755 if (ip_offset > 5 && IS_LOAD_FUN_PTR (CEE_LDFTN)) {
2756 verify_ldftn_delegate (ctx, delegate, value, funptr);
2757 } else if (ip_offset > 6 && IS_VALID_OPCODE (7, CEE_DUP) && IS_LOAD_FUN_PTR (CEE_LDVIRTFTN)) {
2758 ctx->code [ip_offset - 6].flags |= IL_CODE_DELEGATE_SEQUENCE;
2760 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid code sequence for delegate creation at 0x%04x", ctx->ip_offset));
2762 ctx->code [ip_offset].flags |= IL_CODE_DELEGATE_SEQUENCE;
2765 if (is_first_arg_bound) {
2766 if (mono_method_signature (method)->param_count == 0 || !verify_stack_type_compatibility_full (ctx, mono_method_signature (method)->params [0], value, FALSE, TRUE))
2767 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("This object not compatible with function pointer for delegate creation at 0x%04x", ctx->ip_offset));
2769 if (method->flags & METHOD_ATTRIBUTE_STATIC) {
2770 if (!stack_slot_is_null_literal (value) && !is_first_arg_bound)
2771 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Non-null this args used with static function for delegate creation at 0x%04x", ctx->ip_offset));
2773 if (!verify_stack_type_compatibility_full (ctx, &method->klass->byval_arg, value, FALSE, TRUE) && !stack_slot_is_null_literal (value))
2774 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("This object not compatible with function pointer for delegate creation at 0x%04x", ctx->ip_offset));
2778 if (stack_slot_get_type (value) != TYPE_COMPLEX)
2779 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid first parameter for delegate creation at 0x%04x", ctx->ip_offset));
2781 #undef IS_VALID_OPCODE
2782 #undef IS_LOAD_FUN_PTR
2785 /* implement the opcode checks*/
2787 push_arg (VerifyContext *ctx, unsigned int arg, int take_addr)
2791 if (arg >= ctx->max_args) {
2793 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have argument %d", arg + 1));
2795 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method doesn't have argument %d", arg + 1));
2796 if (check_overflow (ctx)) //FIXME: what sane value could we ever push?
2797 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
2799 } else if (check_overflow (ctx)) {
2800 /*We must let the value be pushed, otherwise we would get an underflow error*/
2801 check_unverifiable_type (ctx, ctx->params [arg]);
2802 if (ctx->params [arg]->byref && take_addr)
2803 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ByRef of ByRef at 0x%04x", ctx->ip_offset));
2804 top = stack_push (ctx);
2805 if (!set_stack_value (ctx, top, ctx->params [arg], take_addr))
2808 if (arg == 0 && !(ctx->method->flags & METHOD_ATTRIBUTE_STATIC)) {
2810 ctx->has_this_store = TRUE;
2812 top->stype |= THIS_POINTER_MASK;
2813 if (mono_method_is_constructor (ctx->method) && !ctx->super_ctor_called && !ctx->method->klass->valuetype)
2814 top->stype |= UNINIT_THIS_MASK;
2820 push_local (VerifyContext *ctx, guint32 arg, int take_addr)
2822 if (arg >= ctx->num_locals) {
2823 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have local %d", arg + 1));
2824 } else if (check_overflow (ctx)) {
2825 /*We must let the value be pushed, otherwise we would get an underflow error*/
2826 check_unverifiable_type (ctx, ctx->locals [arg]);
2827 if (ctx->locals [arg]->byref && take_addr)
2828 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ByRef of ByRef at 0x%04x", ctx->ip_offset));
2830 set_stack_value (ctx, stack_push (ctx), ctx->locals [arg], take_addr);
2835 store_arg (VerifyContext *ctx, guint32 arg)
2839 if (arg >= ctx->max_args) {
2840 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method doesn't have argument %d at 0x%04x", arg + 1, ctx->ip_offset));
2841 if (check_underflow (ctx, 1))
2846 if (check_underflow (ctx, 1)) {
2847 value = stack_pop (ctx);
2848 if (!verify_stack_type_compatibility (ctx, ctx->params [arg], value)) {
2849 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type %s in argument store at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
2852 if (arg == 0 && !(ctx->method->flags & METHOD_ATTRIBUTE_STATIC))
2853 ctx->has_this_store = 1;
2857 store_local (VerifyContext *ctx, guint32 arg)
2860 if (arg >= ctx->num_locals) {
2861 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have local var %d at 0x%04x", arg + 1, ctx->ip_offset));
2865 /*TODO verify definite assigment */
2866 if (!check_underflow (ctx, 1))
2869 value = stack_pop (ctx);
2870 if (ctx->locals [arg]->byref && stack_slot_is_managed_mutability_pointer (value))
2871 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));
2873 if (!verify_stack_type_compatibility (ctx, ctx->locals [arg], value)) {
2874 char *expected = mono_type_full_name (ctx->locals [arg]);
2875 char *found = stack_slot_full_name (value);
2876 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type '%s' on stack cannot be stored to local %d with type '%s' at 0x%04x",
2886 /*FIXME add and sub needs special care here*/
2888 do_binop (VerifyContext *ctx, unsigned int opcode, const unsigned char table [TYPE_MAX][TYPE_MAX])
2890 ILStackDesc *a, *b, *top;
2891 int idxa, idxb, complexMerge = 0;
2894 if (!check_underflow (ctx, 2))
2896 b = stack_pop (ctx);
2897 a = stack_pop (ctx);
2899 idxa = stack_slot_get_underlying_type (a);
2900 if (stack_slot_is_managed_pointer (a)) {
2905 idxb = stack_slot_get_underlying_type (b);
2906 if (stack_slot_is_managed_pointer (b)) {
2913 res = table [idxa][idxb];
2915 VERIFIER_DEBUG ( printf ("binop res %d\n", res); );
2916 VERIFIER_DEBUG ( printf ("idxa %d idxb %d\n", idxa, idxb); );
2918 top = stack_push (ctx);
2919 if (res == TYPE_INV) {
2920 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)));
2921 copy_stack_value (top, a);
2925 if (res & NON_VERIFIABLE_RESULT) {
2926 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)));
2928 res = res & ~NON_VERIFIABLE_RESULT;
2931 if (complexMerge && res == TYPE_PTR) {
2932 if (complexMerge == 1)
2933 copy_stack_value (top, a);
2934 else if (complexMerge == 2)
2935 copy_stack_value (top, b);
2937 * There is no need to merge the type of two pointers.
2938 * The only valid operation is subtraction, that returns a native
2939 * int as result and can be used with any 2 pointer kinds.
2940 * This is valid acording to Patition III 1.1.4
2949 do_boolean_branch_op (VerifyContext *ctx, int delta)
2951 int target = ctx->ip_offset + delta;
2954 VERIFIER_DEBUG ( printf ("boolean branch offset %d delta %d target %d\n", ctx->ip_offset, delta, target); );
2956 if (target < 0 || target >= ctx->code_size) {
2957 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Boolean branch target out of code at 0x%04x", ctx->ip_offset));
2961 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
2963 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
2966 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
2970 ctx->target = target;
2972 if (!check_underflow (ctx, 1))
2975 top = stack_pop (ctx);
2976 if (!is_valid_bool_arg (top))
2977 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));
2979 check_unmanaged_pointer (ctx, top);
2983 stack_slot_is_complex_type_not_reference_type (ILStackDesc *slot)
2985 return stack_slot_get_type (slot) == TYPE_COMPLEX && !MONO_TYPE_IS_REFERENCE (slot->type) && !stack_slot_is_boxed_value (slot);
2989 stack_slot_is_reference_value (ILStackDesc *slot)
2991 return stack_slot_get_type (slot) == TYPE_COMPLEX && (MONO_TYPE_IS_REFERENCE (slot->type) || stack_slot_is_boxed_value (slot));
2995 do_branch_op (VerifyContext *ctx, signed int delta, const unsigned char table [TYPE_MAX][TYPE_MAX])
3000 int target = ctx->ip_offset + delta;
3002 VERIFIER_DEBUG ( printf ("branch offset %d delta %d target %d\n", ctx->ip_offset, delta, target); );
3004 if (target < 0 || target >= ctx->code_size) {
3005 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target out of code at 0x%04x", ctx->ip_offset));
3009 switch (is_valid_cmp_branch_instruction (ctx->header, ctx->ip_offset, target)) {
3010 case 1: /*FIXME use constants and not magic numbers.*/
3011 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
3014 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
3018 ctx->target = target;
3020 if (!check_underflow (ctx, 2))
3023 b = stack_pop (ctx);
3024 a = stack_pop (ctx);
3026 idxa = stack_slot_get_underlying_type (a);
3027 if (stack_slot_is_managed_pointer (a))
3030 idxb = stack_slot_get_underlying_type (b);
3031 if (stack_slot_is_managed_pointer (b))
3034 if (stack_slot_is_complex_type_not_reference_type (a) || stack_slot_is_complex_type_not_reference_type (b)) {
3039 res = table [idxa][idxb];
3042 VERIFIER_DEBUG ( printf ("branch res %d\n", res); );
3043 VERIFIER_DEBUG ( printf ("idxa %d idxb %d\n", idxa, idxb); );
3045 if (res == TYPE_INV) {
3046 CODE_NOT_VERIFIABLE (ctx,
3047 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));
3048 } else if (res & NON_VERIFIABLE_RESULT) {
3049 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));
3050 res = res & ~NON_VERIFIABLE_RESULT;
3055 do_cmp_op (VerifyContext *ctx, const unsigned char table [TYPE_MAX][TYPE_MAX], guint32 opcode)
3061 if (!check_underflow (ctx, 2))
3063 b = stack_pop (ctx);
3064 a = stack_pop (ctx);
3066 if (opcode == CEE_CGT_UN) {
3067 if ((stack_slot_is_reference_value (a) && stack_slot_is_null_literal (b)) ||
3068 (stack_slot_is_reference_value (b) && stack_slot_is_null_literal (a))) {
3069 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3074 idxa = stack_slot_get_underlying_type (a);
3075 if (stack_slot_is_managed_pointer (a))
3078 idxb = stack_slot_get_underlying_type (b);
3079 if (stack_slot_is_managed_pointer (b))
3082 if (stack_slot_is_complex_type_not_reference_type (a) || stack_slot_is_complex_type_not_reference_type (b)) {
3087 res = table [idxa][idxb];
3090 if(res == TYPE_INV) {
3091 char *left_type = stack_slot_full_name (a);
3092 char *right_type = stack_slot_full_name (b);
3093 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf("Compare instruction applyed to ill formed stack (%s x %s) at 0x%04x", left_type, right_type, ctx->ip_offset));
3095 g_free (right_type);
3096 } else if (res & NON_VERIFIABLE_RESULT) {
3097 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));
3098 res = res & ~NON_VERIFIABLE_RESULT;
3100 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3104 do_ret (VerifyContext *ctx)
3106 MonoType *ret = ctx->signature->ret;
3107 VERIFIER_DEBUG ( printf ("checking ret\n"); );
3108 if (ret->type != MONO_TYPE_VOID) {
3110 if (!check_underflow (ctx, 1))
3113 top = stack_pop(ctx);
3115 if (!verify_stack_type_compatibility (ctx, ctx->signature->ret, top)) {
3116 char *ret_type = mono_type_full_name (ctx->signature->ret);
3117 char *stack_type = stack_slot_full_name (top);
3118 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));
3119 g_free (stack_type);
3124 if (ret->byref || ret->type == MONO_TYPE_TYPEDBYREF || mono_type_is_value_type (ret, "System", "ArgIterator") || mono_type_is_value_type (ret, "System", "RuntimeArgumentHandle"))
3125 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method returns byref, TypedReference, ArgIterator or RuntimeArgumentHandle at 0x%04x", ctx->ip_offset));
3128 if (ctx->eval.size > 0) {
3129 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack not empty (%d) after ret at 0x%04x", ctx->eval.size, ctx->ip_offset));
3131 if (in_any_block (ctx->header, ctx->ip_offset))
3132 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ret cannot escape exception blocks at 0x%04x", ctx->ip_offset));
3136 * 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.
3137 * This is illegal but mono_get_method_full decoded it.
3138 * TODO handle calling .ctor outside one or calling the .ctor for other class but super
3141 do_invoke_method (VerifyContext *ctx, int method_token, gboolean virtual)
3145 MonoMethodSignature *sig;
3148 gboolean virt_check_this = FALSE;
3149 gboolean constrained = ctx->prefix_set & PREFIX_CONSTRAINED;
3151 if (!(method = verifier_load_method (ctx, method_token, virtual ? "callvirt" : "call")))
3155 CLEAR_PREFIX (ctx, PREFIX_CONSTRAINED);
3157 if (method->klass->valuetype) // && !constrained ???
3158 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use callvirtual with valuetype method at 0x%04x", ctx->ip_offset));
3160 if ((method->flags & METHOD_ATTRIBUTE_STATIC))
3161 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use callvirtual with static method at 0x%04x", ctx->ip_offset));
3164 if (method->flags & METHOD_ATTRIBUTE_ABSTRACT)
3165 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use call with an abstract method at 0x%04x", ctx->ip_offset));
3167 if ((method->flags & METHOD_ATTRIBUTE_VIRTUAL) && !(method->flags & METHOD_ATTRIBUTE_FINAL) && !(method->klass->flags & TYPE_ATTRIBUTE_SEALED)) {
3168 virt_check_this = TRUE;
3169 ctx->code [ctx->ip_offset].flags |= IL_CODE_CALL_NONFINAL_VIRTUAL;
3173 if (!(sig = mono_method_get_signature_checked (method, ctx->image, method_token, ctx->generic_context, &error))) {
3174 mono_error_cleanup (&error);
3175 sig = mono_method_get_signature_checked (method, ctx->image, method_token, NULL, &error);
3179 char *name = mono_type_get_full_name (method->klass);
3180 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Could not resolve signature of %s:%s at 0x%04x due to: %s", name, method->name, ctx->ip_offset, mono_error_get_message (&error)));
3181 mono_error_cleanup (&error);
3186 param_count = sig->param_count + sig->hasthis;
3187 if (!check_underflow (ctx, param_count))
3190 for (i = sig->param_count - 1; i >= 0; --i) {
3191 VERIFIER_DEBUG ( printf ("verifying argument %d\n", i); );
3192 value = stack_pop (ctx);
3193 if (!verify_stack_type_compatibility (ctx, sig->params[i], value)) {
3194 char *stack_name = stack_slot_full_name (value);
3195 char *sig_name = mono_type_full_name (sig->params [i]);
3196 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));
3197 g_free (stack_name);
3201 if (stack_slot_is_managed_mutability_pointer (value))
3202 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));
3204 if ((ctx->prefix_set & PREFIX_TAIL) && stack_slot_is_managed_pointer (value)) {
3205 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));
3211 MonoType *type = &method->klass->byval_arg;
3214 if (mono_method_is_constructor (method) && !method->klass->valuetype) {
3215 if (IS_STRICT_MODE (ctx) && !mono_method_is_constructor (ctx->method))
3216 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot call a constructor outside one at 0x%04x", ctx->ip_offset));
3217 if (IS_STRICT_MODE (ctx) && method->klass != ctx->method->klass->parent && method->klass != ctx->method->klass)
3218 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));
3220 ctx->super_ctor_called = TRUE;
3221 value = stack_pop_safe (ctx);
3222 if (IS_STRICT_MODE (ctx) && (value->stype & THIS_POINTER_MASK) != THIS_POINTER_MASK)
3223 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid 'this ptr' argument for constructor at 0x%04x", ctx->ip_offset));
3225 value = stack_pop (ctx);
3228 copy_stack_value (©, value);
3229 //TODO we should extract this to a 'drop_byref_argument' and use everywhere
3230 //Other parts of the code suffer from the same issue of
3231 copy.type = mono_type_get_type_byval (copy.type);
3232 copy.stype &= ~POINTER_MASK;
3234 if (virt_check_this && !stack_slot_is_this_pointer (value) && !(method->klass->valuetype || stack_slot_is_boxed_value (value)))
3235 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));
3237 if (constrained && virtual) {
3238 if (!stack_slot_is_managed_pointer (value))
3239 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Object is not a managed pointer for a constrained call at 0x%04x", ctx->ip_offset));
3240 if (!mono_metadata_type_equal_full (mono_type_get_type_byval (value->type), mono_type_get_underlying_type (ctx->constrained_type), TRUE))
3241 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Object not compatible with constrained type at 0x%04x", ctx->ip_offset));
3242 copy.stype |= BOXED_MASK;
3243 copy.type = ctx->constrained_type;
3245 if (stack_slot_is_managed_pointer (value) && !mono_class_from_mono_type (value->type)->valuetype)
3246 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));
3248 if (!virtual && mono_class_from_mono_type (value->type)->valuetype && !method->klass->valuetype && !stack_slot_is_boxed_value (value))
3249 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot call a valuetype baseclass at 0x%04x", ctx->ip_offset));
3251 if (virtual && mono_class_from_mono_type (value->type)->valuetype && !stack_slot_is_boxed_value (value))
3252 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a valuetype with callvirt at 0x%04x", ctx->ip_offset));
3254 if (method->klass->valuetype && (stack_slot_is_boxed_value (value) || !stack_slot_is_managed_pointer (value)))
3255 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));
3257 if (!verify_stack_type_compatibility (ctx, type, ©)) {
3258 char *expected = mono_type_full_name (type);
3259 char *effective = stack_slot_full_name (©);
3260 char *method_name = mono_method_full_name (method, TRUE);
3261 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",
3262 expected, effective, method_name, ctx->ip_offset));
3263 g_free (method_name);
3268 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, mono_class_from_mono_type (value->type))) {
3269 char *name = mono_method_full_name (method, TRUE);
3270 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Method %s is not accessible at 0x%04x", name, ctx->ip_offset), MONO_EXCEPTION_METHOD_ACCESS);
3274 } else if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, NULL)) {
3275 char *name = mono_method_full_name (method, TRUE);
3276 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Method %s is not accessible at 0x%04x", name, ctx->ip_offset), MONO_EXCEPTION_METHOD_ACCESS);
3280 if (sig->ret->type != MONO_TYPE_VOID) {
3281 if (!mono_type_is_valid_in_context (ctx, sig->ret))
3284 if (check_overflow (ctx)) {
3285 value = stack_push (ctx);
3286 set_stack_value (ctx, value, sig->ret, FALSE);
3287 if ((ctx->prefix_set & PREFIX_READONLY) && method->klass->rank && !strcmp (method->name, "Address")) {
3288 ctx->prefix_set &= ~PREFIX_READONLY;
3289 value->stype |= CMMP_MASK;
3294 if ((ctx->prefix_set & PREFIX_TAIL)) {
3295 if (!mono_delegate_ret_equal (mono_method_signature (ctx->method)->ret, sig->ret))
3296 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Tail call with incompatible return type at 0x%04x", ctx->ip_offset));
3297 if (ctx->header->code [ctx->ip_offset + 5] != CEE_RET)
3298 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Tail call not followed by ret at 0x%04x", ctx->ip_offset));
3304 do_push_static_field (VerifyContext *ctx, int token, gboolean take_addr)
3306 MonoClassField *field;
3308 if (!check_overflow (ctx))
3311 CLEAR_PREFIX (ctx, PREFIX_VOLATILE);
3313 if (!(field = verifier_load_field (ctx, token, &klass, take_addr ? "ldsflda" : "ldsfld")))
3316 if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC)) {
3317 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot load non static field at 0x%04x", ctx->ip_offset));
3320 /*taking the address of initonly field only works from the static constructor */
3321 if (take_addr && (field->type->attrs & FIELD_ATTRIBUTE_INIT_ONLY) &&
3322 !(field->parent == ctx->method->klass && (ctx->method->flags & (METHOD_ATTRIBUTE_SPECIAL_NAME | METHOD_ATTRIBUTE_STATIC)) && !strcmp (".cctor", ctx->method->name)))
3323 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a init-only field at 0x%04x", ctx->ip_offset));
3325 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3326 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3328 set_stack_value (ctx, stack_push (ctx), field->type, take_addr);
3332 do_store_static_field (VerifyContext *ctx, int token) {
3333 MonoClassField *field;
3336 CLEAR_PREFIX (ctx, PREFIX_VOLATILE);
3338 if (!check_underflow (ctx, 1))
3341 value = stack_pop (ctx);
3343 if (!(field = verifier_load_field (ctx, token, &klass, "stsfld")))
3346 if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC)) {
3347 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot store non static field at 0x%04x", ctx->ip_offset));
3351 if (field->type->type == MONO_TYPE_TYPEDBYREF) {
3352 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Typedbyref field is an unverfiable type in store static field at 0x%04x", ctx->ip_offset));
3356 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3357 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3359 if (!verify_stack_type_compatibility (ctx, field->type, value)) {
3360 char *stack_name = stack_slot_full_name (value);
3361 char *field_name = mono_type_full_name (field->type);
3362 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type in static field store expected '%s' but found '%s' at 0x%04x",
3363 field_name, stack_name, ctx->ip_offset));
3364 g_free (field_name);
3365 g_free (stack_name);
3370 check_is_valid_type_for_field_ops (VerifyContext *ctx, int token, ILStackDesc *obj, MonoClassField **ret_field, const char *opcode)
3372 MonoClassField *field;
3374 gboolean is_pointer;
3376 /*must be a reference type, a managed pointer, an unamanaged pointer, or a valuetype*/
3377 if (!(field = verifier_load_field (ctx, token, &klass, opcode)))
3381 //the value on stack is going to be used as a pointer
3382 is_pointer = stack_slot_get_type (obj) == TYPE_PTR || (stack_slot_get_type (obj) == TYPE_NATIVE_INT && !get_stack_type (&field->parent->byval_arg));
3384 if (field->type->type == MONO_TYPE_TYPEDBYREF) {
3385 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Typedbyref field is an unverfiable type at 0x%04x", ctx->ip_offset));
3388 g_assert (obj->type);
3390 /*The value on the stack must be a subclass of the defining type of the field*/
3391 /* we need to check if we can load the field from the stack value*/
3393 if (stack_slot_get_underlying_type (obj) == TYPE_NATIVE_INT)
3394 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Native int is not a verifiable type to reference a field at 0x%04x", ctx->ip_offset));
3396 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3397 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3399 if (!field->parent->valuetype && stack_slot_is_managed_pointer (obj))
3400 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));
3402 /*a value type can be loaded from a value or a managed pointer, but not a boxed object*/
3403 if (field->parent->valuetype && stack_slot_is_boxed_value (obj))
3404 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));
3406 if (!stack_slot_is_null_literal (obj) && !verify_stack_type_compatibility_full (ctx, &field->parent->byval_arg, obj, TRUE, FALSE)) {
3407 char *found = stack_slot_full_name (obj);
3408 char *expected = mono_type_full_name (&field->parent->byval_arg);
3409 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));
3414 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, mono_class_from_mono_type (obj->type)))
3415 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3418 check_unmanaged_pointer (ctx, obj);
3423 do_push_field (VerifyContext *ctx, int token, gboolean take_addr)
3426 MonoClassField *field;
3429 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3431 if (!check_underflow (ctx, 1))
3433 obj = stack_pop_safe (ctx);
3435 if (!check_is_valid_type_for_field_ops (ctx, token, obj, &field, take_addr ? "ldflda" : "ldfld"))
3438 if (take_addr && field->parent->valuetype && !stack_slot_is_managed_pointer (obj))
3439 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a temporary value-type at 0x%04x", ctx->ip_offset));
3441 if (take_addr && (field->type->attrs & FIELD_ATTRIBUTE_INIT_ONLY) &&
3442 !(field->parent == ctx->method->klass && mono_method_is_constructor (ctx->method)))
3443 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a init-only field at 0x%04x", ctx->ip_offset));
3445 set_stack_value (ctx, stack_push (ctx), field->type, take_addr);
3449 do_store_field (VerifyContext *ctx, int token)
3451 ILStackDesc *value, *obj;
3452 MonoClassField *field;
3453 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3455 if (!check_underflow (ctx, 2))
3458 value = stack_pop (ctx);
3459 obj = stack_pop_safe (ctx);
3461 if (!check_is_valid_type_for_field_ops (ctx, token, obj, &field, "stfld"))
3464 if (!verify_stack_type_compatibility (ctx, field->type, value))
3465 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type %s in field store at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3468 /*TODO proper handle for Nullable<T>*/
3470 do_box_value (VerifyContext *ctx, int klass_token)
3473 MonoType *type = get_boxable_mono_type (ctx, klass_token, "box");
3479 if (!check_underflow (ctx, 1))
3482 value = stack_pop (ctx);
3483 /*box is a nop for reference types*/
3485 if (stack_slot_get_underlying_type (value) == TYPE_COMPLEX && MONO_TYPE_IS_REFERENCE (value->type) && MONO_TYPE_IS_REFERENCE (type)) {
3486 stack_push_stack_val (ctx, value)->stype |= BOXED_MASK;
3491 if (!verify_stack_type_compatibility (ctx, type, value))
3492 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for boxing operation at 0x%04x", ctx->ip_offset));
3494 klass = mono_class_from_mono_type (type);
3495 if (mono_class_is_nullable (klass))
3496 type = &mono_class_get_nullable_param (klass)->byval_arg;
3497 stack_push_val (ctx, TYPE_COMPLEX | BOXED_MASK, type);
3501 do_unbox_value (VerifyContext *ctx, int klass_token)
3504 MonoType *type = get_boxable_mono_type (ctx, klass_token, "unbox");
3509 if (!check_underflow (ctx, 1))
3512 if (!mono_class_from_mono_type (type)->valuetype)
3513 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid reference type for unbox at 0x%04x", ctx->ip_offset));
3515 value = stack_pop (ctx);
3517 /*Value should be: a boxed valuetype or a reference type*/
3518 if (!(stack_slot_get_type (value) == TYPE_COMPLEX &&
3519 (stack_slot_is_boxed_value (value) || !mono_class_from_mono_type (value->type)->valuetype)))
3520 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));
3522 set_stack_value (ctx, value = stack_push (ctx), mono_type_get_type_byref (type), FALSE);
3523 value->stype |= CMMP_MASK;
3527 do_unbox_any (VerifyContext *ctx, int klass_token)
3530 MonoType *type = get_boxable_mono_type (ctx, klass_token, "unbox.any");
3535 if (!check_underflow (ctx, 1))
3538 value = stack_pop (ctx);
3540 /*Value should be: a boxed valuetype or a reference type*/
3541 if (!(stack_slot_get_type (value) == TYPE_COMPLEX &&
3542 (stack_slot_is_boxed_value (value) || !mono_class_from_mono_type (value->type)->valuetype)))
3543 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));
3545 set_stack_value (ctx, stack_push (ctx), type, FALSE);
3549 do_unary_math_op (VerifyContext *ctx, int op)
3552 if (!check_underflow (ctx, 1))
3554 value = stack_pop (ctx);
3555 switch (stack_slot_get_type (value)) {
3558 case TYPE_NATIVE_INT:
3563 case TYPE_COMPLEX: /*only enums are ok*/
3564 if (mono_type_is_enum_type (value->type))
3567 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for unary not at 0x%04x", ctx->ip_offset));
3569 stack_push_stack_val (ctx, value);
3573 do_conversion (VerifyContext *ctx, int kind)
3576 if (!check_underflow (ctx, 1))
3578 value = stack_pop (ctx);
3580 switch (stack_slot_get_type (value)) {
3583 case TYPE_NATIVE_INT:
3587 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));
3592 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3595 stack_push_val (ctx,TYPE_I8, &mono_defaults.int64_class->byval_arg);
3598 stack_push_val (ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
3600 case TYPE_NATIVE_INT:
3601 stack_push_val (ctx, TYPE_NATIVE_INT, &mono_defaults.int_class->byval_arg);
3604 g_error ("unknown type %02x in conversion", kind);
3610 do_load_token (VerifyContext *ctx, int token)
3614 MonoClass *handle_class;
3615 if (!check_overflow (ctx))
3618 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
3619 handle = mono_method_get_wrapper_data (ctx->method, token);
3620 handle_class = mono_method_get_wrapper_data (ctx->method, token + 1);
3621 if (handle_class == mono_defaults.typehandle_class)
3622 handle = &((MonoClass*)handle)->byval_arg;
3624 switch (token & 0xff000000) {
3625 case MONO_TOKEN_TYPE_DEF:
3626 case MONO_TOKEN_TYPE_REF:
3627 case MONO_TOKEN_TYPE_SPEC:
3628 case MONO_TOKEN_FIELD_DEF:
3629 case MONO_TOKEN_METHOD_DEF:
3630 case MONO_TOKEN_METHOD_SPEC:
3631 case MONO_TOKEN_MEMBER_REF:
3632 if (!token_bounds_check (ctx->image, token)) {
3633 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));
3638 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));
3642 handle = mono_ldtoken_checked (ctx->image, token, &handle_class, ctx->generic_context, &error);
3646 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid token 0x%x for ldtoken at 0x%04x due to %s", token, ctx->ip_offset, mono_error_get_message (&error)));
3647 mono_error_cleanup (&error);
3650 if (handle_class == mono_defaults.typehandle_class) {
3651 mono_type_is_valid_in_context (ctx, (MonoType*)handle);
3652 } else if (handle_class == mono_defaults.methodhandle_class) {
3653 mono_method_is_valid_in_context (ctx, (MonoMethod*)handle);
3654 } else if (handle_class == mono_defaults.fieldhandle_class) {
3655 mono_type_is_valid_in_context (ctx, &((MonoClassField*)handle)->parent->byval_arg);
3657 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid ldtoken type %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
3659 stack_push_val (ctx, TYPE_COMPLEX, mono_class_get_type (handle_class));
3663 do_ldobj_value (VerifyContext *ctx, int token)
3666 MonoType *type = get_boxable_mono_type (ctx, token, "ldobj");
3667 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3672 if (!check_underflow (ctx, 1))
3675 value = stack_pop (ctx);
3676 if (!stack_slot_is_managed_pointer (value)
3677 && stack_slot_get_type (value) != TYPE_NATIVE_INT
3678 && !(stack_slot_get_type (value) == TYPE_PTR && value->type->type != MONO_TYPE_FNPTR)) {
3679 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid argument %s to ldobj at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3683 if (stack_slot_get_type (value) == TYPE_NATIVE_INT)
3684 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Using native pointer to ldobj at 0x%04x", ctx->ip_offset));
3686 /*We have a byval on the stack, but the comparison must be strict. */
3687 if (!verify_type_compatibility_full (ctx, type, mono_type_get_type_byval (value->type), TRUE))
3688 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldojb operation at 0x%04x", ctx->ip_offset));
3690 set_stack_value (ctx, stack_push (ctx), type, FALSE);
3694 do_stobj (VerifyContext *ctx, int token)
3696 ILStackDesc *dest, *src;
3697 MonoType *type = get_boxable_mono_type (ctx, token, "stobj");
3698 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3703 if (!check_underflow (ctx, 2))
3706 src = stack_pop (ctx);
3707 dest = stack_pop (ctx);
3709 if (stack_slot_is_managed_mutability_pointer (dest))
3710 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with stobj at 0x%04x", ctx->ip_offset));
3712 if (!stack_slot_is_managed_pointer (dest))
3713 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid destination of stobj operation at 0x%04x", ctx->ip_offset));
3715 if (stack_slot_is_boxed_value (src) && !MONO_TYPE_IS_REFERENCE (src->type) && !MONO_TYPE_IS_REFERENCE (type))
3716 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));
3718 if (!verify_stack_type_compatibility (ctx, type, src)) {
3719 char *type_name = mono_type_full_name (type);
3720 char *src_name = stack_slot_full_name (src);
3721 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));
3726 if (!verify_type_compatibility (ctx, mono_type_get_type_byval (dest->type), type))
3727 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Destination and token types of stobj don't match at 0x%04x", ctx->ip_offset));
3731 do_cpobj (VerifyContext *ctx, int token)
3733 ILStackDesc *dest, *src;
3734 MonoType *type = get_boxable_mono_type (ctx, token, "cpobj");
3738 if (!check_underflow (ctx, 2))
3741 src = stack_pop (ctx);
3742 dest = stack_pop (ctx);
3744 if (!stack_slot_is_managed_pointer (src))
3745 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid source of cpobj operation at 0x%04x", ctx->ip_offset));
3747 if (!stack_slot_is_managed_pointer (dest))
3748 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid destination of cpobj operation at 0x%04x", ctx->ip_offset));
3750 if (stack_slot_is_managed_mutability_pointer (dest))
3751 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with cpobj at 0x%04x", ctx->ip_offset));
3753 if (!verify_type_compatibility (ctx, type, mono_type_get_type_byval (src->type)))
3754 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Token and source types of cpobj don't match at 0x%04x", ctx->ip_offset));
3756 if (!verify_type_compatibility (ctx, mono_type_get_type_byval (dest->type), type))
3757 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Destination and token types of cpobj don't match at 0x%04x", ctx->ip_offset));
3761 do_initobj (VerifyContext *ctx, int token)
3764 MonoType *stack, *type = get_boxable_mono_type (ctx, token, "initobj");
3768 if (!check_underflow (ctx, 1))
3771 obj = stack_pop (ctx);
3773 if (!stack_slot_is_managed_pointer (obj))
3774 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid object address for initobj at 0x%04x", ctx->ip_offset));
3776 if (stack_slot_is_managed_mutability_pointer (obj))
3777 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with initobj at 0x%04x", ctx->ip_offset));
3779 stack = mono_type_get_type_byval (obj->type);
3780 if (MONO_TYPE_IS_REFERENCE (stack)) {
3781 if (!verify_type_compatibility (ctx, stack, type))
3782 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type token of initobj not compatible with value on stack at 0x%04x", ctx->ip_offset));
3783 else if (IS_STRICT_MODE (ctx) && !mono_metadata_type_equal (type, stack))
3784 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type token of initobj not compatible with value on stack at 0x%04x", ctx->ip_offset));
3785 } else if (!verify_type_compatibility (ctx, stack, type)) {
3786 char *expected_name = mono_type_full_name (type);
3787 char *stack_name = mono_type_full_name (stack);
3789 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));
3790 g_free (expected_name);
3791 g_free (stack_name);
3796 do_newobj (VerifyContext *ctx, int token)
3800 MonoMethodSignature *sig;
3802 gboolean is_delegate = FALSE;
3804 if (!(method = verifier_load_method (ctx, token, "newobj")))
3807 if (!mono_method_is_constructor (method)) {
3808 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method from token 0x%08x not a constructor at 0x%04x", token, ctx->ip_offset));
3812 if (method->klass->flags & (TYPE_ATTRIBUTE_ABSTRACT | TYPE_ATTRIBUTE_INTERFACE))
3813 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Trying to instantiate an abstract or interface type at 0x%04x", ctx->ip_offset));
3815 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, NULL)) {
3816 char *from = mono_method_full_name (ctx->method, TRUE);
3817 char *to = mono_method_full_name (method, TRUE);
3818 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);
3823 //FIXME use mono_method_get_signature_full
3824 sig = mono_method_signature (method);
3826 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid constructor signature to newobj at 0x%04x", ctx->ip_offset));
3830 if (!sig->hasthis) {
3831 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid constructor signature missing hasthis at 0x%04x", ctx->ip_offset));
3835 if (!check_underflow (ctx, sig->param_count))
3838 is_delegate = method->klass->parent == mono_defaults.multicastdelegate_class;
3841 ILStackDesc *funptr;
3842 //first arg is object, second arg is fun ptr
3843 if (sig->param_count != 2) {
3844 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid delegate constructor at 0x%04x", ctx->ip_offset));
3847 funptr = stack_pop (ctx);
3848 value = stack_pop (ctx);
3849 verify_delegate_compatibility (ctx, method->klass, value, funptr);
3851 for (i = sig->param_count - 1; i >= 0; --i) {
3852 VERIFIER_DEBUG ( printf ("verifying constructor argument %d\n", i); );
3853 value = stack_pop (ctx);
3854 if (!verify_stack_type_compatibility (ctx, sig->params [i], value)) {
3855 char *stack_name = stack_slot_full_name (value);
3856 char *sig_name = mono_type_full_name (sig->params [i]);
3857 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));
3858 g_free (stack_name);
3862 if (stack_slot_is_managed_mutability_pointer (value))
3863 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer as argument of newobj at 0x%04x", ctx->ip_offset));
3867 if (check_overflow (ctx))
3868 set_stack_value (ctx, stack_push (ctx), &method->klass->byval_arg, FALSE);
3872 do_cast (VerifyContext *ctx, int token, const char *opcode) {
3878 if (!check_underflow (ctx, 1))
3881 if (!(type = get_boxable_mono_type (ctx, token, opcode)))
3885 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid %s type at 0x%04x", opcode, ctx->ip_offset));
3889 value = stack_pop (ctx);
3890 is_boxed = stack_slot_is_boxed_value (value);
3892 if (stack_slot_is_managed_pointer (value))
3893 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value for %s at 0x%04x", opcode, ctx->ip_offset));
3894 else if (!MONO_TYPE_IS_REFERENCE (value->type) && !is_boxed) {
3895 char *name = stack_slot_full_name (value);
3896 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));
3900 switch (value->type->type) {
3901 case MONO_TYPE_FNPTR:
3903 case MONO_TYPE_TYPEDBYREF:
3904 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value for %s at 0x%04x", opcode, ctx->ip_offset));
3907 do_box = is_boxed || mono_type_is_generic_argument(type) || mono_class_from_mono_type (type)->valuetype;
3908 stack_push_val (ctx, TYPE_COMPLEX | (do_box ? BOXED_MASK : 0), type);
3912 mono_type_from_opcode (int opcode) {
3920 return &mono_defaults.sbyte_class->byval_arg;
3928 return &mono_defaults.int16_class->byval_arg;
3936 return &mono_defaults.int32_class->byval_arg;
3942 return &mono_defaults.int64_class->byval_arg;
3948 return &mono_defaults.single_class->byval_arg;
3954 return &mono_defaults.double_class->byval_arg;
3960 return &mono_defaults.int_class->byval_arg;
3964 case CEE_LDELEM_REF:
3965 case CEE_STELEM_REF:
3966 return &mono_defaults.object_class->byval_arg;
3969 g_error ("unknown opcode %02x in mono_type_from_opcode ", opcode);
3975 do_load_indirect (VerifyContext *ctx, int opcode)
3978 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3980 if (!check_underflow (ctx, 1))
3983 value = stack_pop (ctx);
3984 if (!stack_slot_is_managed_pointer (value)) {
3985 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Load indirect not using a manager pointer at 0x%04x", ctx->ip_offset));
3986 set_stack_value (ctx, stack_push (ctx), mono_type_from_opcode (opcode), FALSE);
3990 if (opcode == CEE_LDIND_REF) {
3991 if (stack_slot_get_underlying_type (value) != TYPE_COMPLEX || mono_class_from_mono_type (value->type)->valuetype)
3992 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldind_ref expected object byref operation at 0x%04x", ctx->ip_offset));
3993 set_stack_value (ctx, stack_push (ctx), mono_type_get_type_byval (value->type), FALSE);
3995 if (!verify_type_compatibility_full (ctx, mono_type_from_opcode (opcode), mono_type_get_type_byval (value->type), TRUE))
3996 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
3997 set_stack_value (ctx, stack_push (ctx), mono_type_from_opcode (opcode), FALSE);
4002 do_store_indirect (VerifyContext *ctx, int opcode)
4004 ILStackDesc *addr, *val;
4005 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
4007 if (!check_underflow (ctx, 2))
4010 val = stack_pop (ctx);
4011 addr = stack_pop (ctx);
4013 check_unmanaged_pointer (ctx, addr);
4015 if (!stack_slot_is_managed_pointer (addr) && stack_slot_get_type (addr) != TYPE_PTR) {
4016 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid non-pointer argument to stind at 0x%04x", ctx->ip_offset));
4020 if (stack_slot_is_managed_mutability_pointer (addr)) {
4021 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with stind at 0x%04x", ctx->ip_offset));
4025 if (!verify_type_compatibility_full (ctx, mono_type_from_opcode (opcode), mono_type_get_type_byval (addr->type), TRUE))
4026 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid addr type at stack for stind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
4028 if (!verify_stack_type_compatibility (ctx, mono_type_from_opcode (opcode), val))
4029 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value type at stack for stind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
4033 do_newarr (VerifyContext *ctx, int token)
4036 MonoType *type = get_boxable_mono_type (ctx, token, "newarr");
4041 if (!check_underflow (ctx, 1))
4044 value = stack_pop (ctx);
4045 if (stack_slot_get_type (value) != TYPE_I4 && stack_slot_get_type (value) != TYPE_NATIVE_INT)
4046 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));
4048 set_stack_value (ctx, stack_push (ctx), mono_class_get_type (mono_array_class_get (mono_class_from_mono_type (type), 1)), FALSE);
4051 /*FIXME handle arrays that are not 0-indexed*/
4053 do_ldlen (VerifyContext *ctx)
4057 if (!check_underflow (ctx, 1))
4060 value = stack_pop (ctx);
4062 if (stack_slot_get_type (value) != TYPE_COMPLEX || value->type->type != MONO_TYPE_SZARRAY)
4063 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type for ldlen at 0x%04x", ctx->ip_offset));
4065 stack_push_val (ctx, TYPE_NATIVE_INT, &mono_defaults.int_class->byval_arg);
4068 /*FIXME handle arrays that are not 0-indexed*/
4069 /*FIXME handle readonly prefix and CMMP*/
4071 do_ldelema (VerifyContext *ctx, int klass_token)
4073 ILStackDesc *index, *array, *res;
4074 MonoType *type = get_boxable_mono_type (ctx, klass_token, "ldelema");
4080 if (!check_underflow (ctx, 2))
4083 index = stack_pop (ctx);
4084 array = stack_pop (ctx);
4086 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4087 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));
4089 if (!stack_slot_is_null_literal (array)) {
4090 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY)
4091 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type(%s) for ldelema at 0x%04x", stack_slot_get_name (array), ctx->ip_offset));
4093 if (get_stack_type (type) == TYPE_I4 || get_stack_type (type) == TYPE_NATIVE_INT) {
4094 valid = verify_type_compatibility_full (ctx, type, &array->type->data.klass->byval_arg, TRUE);
4096 valid = mono_metadata_type_equal (type, &array->type->data.klass->byval_arg);
4099 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelema at 0x%04x", ctx->ip_offset));
4103 res = stack_push (ctx);
4104 set_stack_value (ctx, res, type, TRUE);
4105 if (ctx->prefix_set & PREFIX_READONLY) {
4106 ctx->prefix_set &= ~PREFIX_READONLY;
4107 res->stype |= CMMP_MASK;
4112 * FIXME handle arrays that are not 0-indexed
4113 * FIXME handle readonly prefix and CMMP
4116 do_ldelem (VerifyContext *ctx, int opcode, int token)
4118 #define IS_ONE_OF2(T, A, B) (T == A || T == B)
4119 ILStackDesc *index, *array;
4121 if (!check_underflow (ctx, 2))
4124 if (opcode == CEE_LDELEM) {
4125 if (!(type = verifier_load_type (ctx, token, "ldelem.any"))) {
4126 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Type (0x%08x) not found at 0x%04x", token, ctx->ip_offset));
4130 type = mono_type_from_opcode (opcode);
4133 index = stack_pop (ctx);
4134 array = stack_pop (ctx);
4136 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4137 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));
4139 if (!stack_slot_is_null_literal (array)) {
4140 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY)
4141 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));
4143 if (opcode == CEE_LDELEM_REF) {
4144 if (array->type->data.klass->valuetype)
4145 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type is not a reference type for ldelem.ref 0x%04x", ctx->ip_offset));
4146 type = &array->type->data.klass->byval_arg;
4148 MonoType *candidate = &array->type->data.klass->byval_arg;
4149 if (IS_STRICT_MODE (ctx)) {
4150 MonoType *underlying_type = mono_type_get_underlying_type_any (type);
4151 MonoType *underlying_candidate = mono_type_get_underlying_type_any (candidate);
4152 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)) ||
4153 (IS_ONE_OF2 (underlying_candidate->type, MONO_TYPE_I4, MONO_TYPE_U4) && IS_ONE_OF2 (underlying_type->type, MONO_TYPE_I, MONO_TYPE_U)))
4154 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelem.X at 0x%04x", ctx->ip_offset));
4156 if (!verify_type_compatibility_full (ctx, type, candidate, TRUE))
4157 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelem.X at 0x%04x", ctx->ip_offset));
4162 set_stack_value (ctx, stack_push (ctx), type, FALSE);
4167 * FIXME handle arrays that are not 0-indexed
4170 do_stelem (VerifyContext *ctx, int opcode, int token)
4172 ILStackDesc *index, *array, *value;
4174 if (!check_underflow (ctx, 3))
4177 if (opcode == CEE_STELEM) {
4178 if (!(type = verifier_load_type (ctx, token, "stelem.any"))) {
4179 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Type (0x%08x) not found at 0x%04x", token, ctx->ip_offset));
4183 type = mono_type_from_opcode (opcode);
4186 value = stack_pop (ctx);
4187 index = stack_pop (ctx);
4188 array = stack_pop (ctx);
4190 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4191 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));
4193 if (!stack_slot_is_null_literal (array)) {
4194 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY) {
4195 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));
4197 if (opcode == CEE_STELEM_REF) {
4198 if (array->type->data.klass->valuetype)
4199 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type is not a reference type for stelem.ref 0x%04x", ctx->ip_offset));
4200 } else if (!verify_type_compatibility_full (ctx, &array->type->data.klass->byval_arg, type, TRUE)) {
4201 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for stdelem.X at 0x%04x", ctx->ip_offset));
4205 if (opcode == CEE_STELEM_REF) {
4206 if (!stack_slot_is_boxed_value (value) && mono_class_from_mono_type (value->type)->valuetype)
4207 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value is not a reference type for stelem.ref 0x%04x", ctx->ip_offset));
4208 } else if (opcode != CEE_STELEM_REF) {
4209 if (!verify_stack_type_compatibility (ctx, type, value))
4210 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value on stack for stdelem.X at 0x%04x", ctx->ip_offset));
4212 if (stack_slot_is_boxed_value (value) && !MONO_TYPE_IS_REFERENCE (value->type) && !MONO_TYPE_IS_REFERENCE (type))
4213 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));
4219 do_throw (VerifyContext *ctx)
4221 ILStackDesc *exception;
4222 if (!check_underflow (ctx, 1))
4224 exception = stack_pop (ctx);
4226 if (!stack_slot_is_null_literal (exception) && !(stack_slot_get_type (exception) == TYPE_COMPLEX && !mono_class_from_mono_type (exception->type)->valuetype))
4227 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type on stack for throw, expected reference type at 0x%04x", ctx->ip_offset));
4229 if (mono_type_is_generic_argument (exception->type) && !stack_slot_is_boxed_value (exception)) {
4230 char *name = mono_type_full_name (exception->type);
4231 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));
4234 /*The stack is left empty after a throw*/
4240 do_endfilter (VerifyContext *ctx)
4242 MonoExceptionClause *clause;
4244 if (IS_STRICT_MODE (ctx)) {
4245 if (ctx->eval.size != 1)
4246 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack size must have one item for endfilter at 0x%04x", ctx->ip_offset));
4248 if (ctx->eval.size >= 1 && stack_slot_get_type (stack_pop (ctx)) != TYPE_I4)
4249 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack item type is not an int32 for endfilter at 0x%04x", ctx->ip_offset));
4252 if ((clause = is_correct_endfilter (ctx, ctx->ip_offset))) {
4253 if (IS_STRICT_MODE (ctx)) {
4254 if (ctx->ip_offset != clause->handler_offset - 2)
4255 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter is not the last instruction of the filter clause at 0x%04x", ctx->ip_offset));
4257 if ((ctx->ip_offset != clause->handler_offset - 2) && !MONO_OFFSET_IN_HANDLER (clause, ctx->ip_offset))
4258 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter is not the last instruction of the filter clause at 0x%04x", ctx->ip_offset));
4261 if (IS_STRICT_MODE (ctx) && !is_unverifiable_endfilter (ctx, ctx->ip_offset))
4262 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter outside filter clause at 0x%04x", ctx->ip_offset));
4264 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("endfilter outside filter clause at 0x%04x", ctx->ip_offset));
4271 do_leave (VerifyContext *ctx, int delta)
4273 int target = ((gint32)ctx->ip_offset) + delta;
4274 if (target >= ctx->code_size || target < 0)
4275 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target out of code at 0x%04x", ctx->ip_offset));
4277 if (!is_correct_leave (ctx->header, ctx->ip_offset, target))
4278 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Leave not allowed in finally block at 0x%04x", ctx->ip_offset));
4280 ctx->target = target;
4286 * Verify br and br.s opcodes.
4289 do_static_branch (VerifyContext *ctx, int delta)
4291 int target = ctx->ip_offset + delta;
4292 if (target < 0 || target >= ctx->code_size) {
4293 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("branch target out of code at 0x%04x", ctx->ip_offset));
4297 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
4299 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
4302 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
4306 ctx->target = target;
4310 do_switch (VerifyContext *ctx, int count, const unsigned char *data)
4312 int i, base = ctx->ip_offset + 5 + count * 4;
4315 if (!check_underflow (ctx, 1))
4318 value = stack_pop (ctx);
4320 if (stack_slot_get_type (value) != TYPE_I4 && stack_slot_get_type (value) != TYPE_NATIVE_INT)
4321 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid argument to switch at 0x%04x", ctx->ip_offset));
4323 for (i = 0; i < count; ++i) {
4324 int target = base + read32 (data + i * 4);
4326 if (target < 0 || target >= ctx->code_size) {
4327 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Switch target %x out of code at 0x%04x", i, ctx->ip_offset));
4331 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
4333 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Switch target %x escapes out of exception block at 0x%04x", i, ctx->ip_offset));
4336 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Switch target %x escapes out of exception block at 0x%04x", i, ctx->ip_offset));
4339 merge_stacks (ctx, &ctx->eval, &ctx->code [target], FALSE, TRUE);
4344 do_load_function_ptr (VerifyContext *ctx, guint32 token, gboolean virtual)
4349 if (virtual && !check_underflow (ctx, 1))
4352 if (!virtual && !check_overflow (ctx))
4355 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
4356 method = mono_method_get_wrapper_data (ctx->method, (guint32)token);
4358 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid token %x for ldftn at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4362 if (!IS_METHOD_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
4363 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid token %x for ldftn at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4367 if (!(method = verifier_load_method (ctx, token, virtual ? "ldvirtfrn" : "ldftn")))
4371 if (mono_method_is_constructor (method))
4372 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use ldftn with a constructor at 0x%04x", ctx->ip_offset));
4375 ILStackDesc *top = stack_pop (ctx);
4377 if (stack_slot_get_type (top) != TYPE_COMPLEX || top->type->type == MONO_TYPE_VALUETYPE)
4378 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid argument to ldvirtftn at 0x%04x", ctx->ip_offset));
4380 if (method->flags & METHOD_ATTRIBUTE_STATIC)
4381 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use ldvirtftn with a constructor at 0x%04x", ctx->ip_offset));
4383 if (!verify_stack_type_compatibility (ctx, &method->klass->byval_arg, top))
4384 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unexpected object for ldvirtftn at 0x%04x", ctx->ip_offset));
4387 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, NULL))
4388 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);
4390 top = stack_push_val(ctx, TYPE_PTR, mono_type_create_fnptr_from_mono_method (ctx, method));
4391 top->method = method;
4395 do_sizeof (VerifyContext *ctx, int token)
4399 if (!(type = verifier_load_type (ctx, token, "sizeof")))
4402 if (type->byref && type->type != MONO_TYPE_TYPEDBYREF) {
4403 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of byref type at 0x%04x", ctx->ip_offset));
4407 if (type->type == MONO_TYPE_VOID) {
4408 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of void type at 0x%04x", ctx->ip_offset));
4412 if (check_overflow (ctx))
4413 set_stack_value (ctx, stack_push (ctx), &mono_defaults.uint32_class->byval_arg, FALSE);
4416 /* Stack top can be of any type, the runtime doesn't care and treat everything as an int. */
4418 do_localloc (VerifyContext *ctx)
4422 if (ctx->eval.size != 1) {
4423 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack must have only size item in localloc at 0x%04x", ctx->ip_offset));
4427 if (in_any_exception_block (ctx->header, ctx->ip_offset)) {
4428 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack must have only size item in localloc at 0x%04x", ctx->ip_offset));
4432 /*TODO verify top type*/
4433 top = stack_pop (ctx);
4435 set_stack_value (ctx, stack_push (ctx), &mono_defaults.int_class->byval_arg, FALSE);
4436 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Instruction localloc in never verifiable at 0x%04x", ctx->ip_offset));
4440 do_ldstr (VerifyContext *ctx, guint32 token)
4442 GSList *error = NULL;
4443 if (ctx->method->wrapper_type == MONO_WRAPPER_NONE && !image_is_dynamic (ctx->image)) {
4444 if (mono_metadata_token_code (token) != MONO_TOKEN_STRING) {
4445 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid string token %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4449 if (!mono_verifier_verify_string_signature (ctx->image, mono_metadata_token_index (token), &error)) {
4451 ctx->list = g_slist_concat (ctx->list, error);
4452 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid string index %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4457 if (check_overflow (ctx))
4458 stack_push_val (ctx, TYPE_COMPLEX, &mono_defaults.string_class->byval_arg);
4462 do_refanyval (VerifyContext *ctx, int token)
4466 if (!check_underflow (ctx, 1))
4469 if (!(type = get_boxable_mono_type (ctx, token, "refanyval")))
4472 top = stack_pop (ctx);
4474 if (top->stype != TYPE_PTR || top->type->type != MONO_TYPE_TYPEDBYREF)
4475 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));
4477 set_stack_value (ctx, stack_push (ctx), type, TRUE);
4481 do_refanytype (VerifyContext *ctx)
4485 if (!check_underflow (ctx, 1))
4488 top = stack_pop (ctx);
4490 if (top->stype != TYPE_PTR || top->type->type != MONO_TYPE_TYPEDBYREF)
4491 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));
4493 set_stack_value (ctx, stack_push (ctx), &mono_defaults.typehandle_class->byval_arg, FALSE);
4498 do_mkrefany (VerifyContext *ctx, int token)
4502 if (!check_underflow (ctx, 1))
4505 if (!(type = get_boxable_mono_type (ctx, token, "refanyval")))
4508 top = stack_pop (ctx);
4510 if (stack_slot_is_managed_mutability_pointer (top))
4511 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with mkrefany at 0x%04x", ctx->ip_offset));
4513 if (!stack_slot_is_managed_pointer (top)) {
4514 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));
4516 MonoType *stack_type = mono_type_get_type_byval (top->type);
4517 if (MONO_TYPE_IS_REFERENCE (type) && !mono_metadata_type_equal (type, stack_type))
4518 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type not compatible for mkrefany at 0x%04x", ctx->ip_offset));
4520 if (!MONO_TYPE_IS_REFERENCE (type) && !verify_type_compatibility_full (ctx, type, stack_type, TRUE))
4521 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type not compatible for mkrefany at 0x%04x", ctx->ip_offset));
4524 set_stack_value (ctx, stack_push (ctx), &mono_defaults.typed_reference_class->byval_arg, FALSE);
4528 do_ckfinite (VerifyContext *ctx)
4531 if (!check_underflow (ctx, 1))
4534 top = stack_pop (ctx);
4536 if (stack_slot_get_underlying_type (top) != TYPE_R8)
4537 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));
4538 stack_push_stack_val (ctx, top);
4542 * Merge the stacks and perform compat checks. The merge check if types of @from are mergeable with type of @to
4544 * @from holds new values for a given control path
4545 * @to holds the current values of a given control path
4547 * TODO we can eliminate the from argument as all callers pass &ctx->eval
4550 merge_stacks (VerifyContext *ctx, ILCodeDesc *from, ILCodeDesc *to, gboolean start, gboolean external)
4554 stack_init (ctx, to);
4557 if (to->flags == IL_CODE_FLAG_NOT_PROCESSED)
4560 stack_copy (&ctx->eval, to);
4562 } else if (!(to->flags & IL_CODE_STACK_MERGED)) {
4563 stack_copy (to, &ctx->eval);
4566 VERIFIER_DEBUG ( printf ("performing stack merge %d x %d\n", from->size, to->size); );
4568 if (from->size != to->size) {
4569 VERIFIER_DEBUG ( printf ("different stack sizes %d x %d at 0x%04x\n", from->size, to->size, ctx->ip_offset); );
4570 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));
4574 //FIXME we need to preserve CMMP attributes
4575 //FIXME we must take null literals into consideration.
4576 for (i = 0; i < from->size; ++i) {
4577 ILStackDesc *new_slot = from->stack + i;
4578 ILStackDesc *old_slot = to->stack + i;
4579 MonoType *new_type = mono_type_from_stack_slot (new_slot);
4580 MonoType *old_type = mono_type_from_stack_slot (old_slot);
4581 MonoClass *old_class = mono_class_from_mono_type (old_type);
4582 MonoClass *new_class = mono_class_from_mono_type (new_type);
4583 MonoClass *match_class = NULL;
4585 // S := T then U = S (new value is compatible with current value, keep current)
4586 if (verify_stack_type_compatibility (ctx, old_type, new_slot)) {
4587 copy_stack_value (new_slot, old_slot);
4591 // T := S then U = T (old value is compatible with current value, use new)
4592 if (verify_stack_type_compatibility (ctx, new_type, old_slot)) {
4593 copy_stack_value (old_slot, new_slot);
4597 /*Both slots are the same boxed valuetype. Simply copy it.*/
4598 if (stack_slot_is_boxed_value (old_slot) &&
4599 stack_slot_is_boxed_value (new_slot) &&
4600 mono_metadata_type_equal (old_type, new_type)) {
4601 copy_stack_value (new_slot, old_slot);
4605 if (mono_type_is_generic_argument (old_type) || mono_type_is_generic_argument (new_type)) {
4606 char *old_name = stack_slot_full_name (old_slot);
4607 char *new_name = stack_slot_full_name (new_slot);
4608 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));
4614 //both are reference types, use closest common super type
4615 if (!mono_class_from_mono_type (old_type)->valuetype
4616 && !mono_class_from_mono_type (new_type)->valuetype
4617 && !stack_slot_is_managed_pointer (old_slot)
4618 && !stack_slot_is_managed_pointer (new_slot)) {
4620 mono_class_setup_supertypes (old_class);
4621 mono_class_setup_supertypes (new_class);
4623 for (j = MIN (old_class->idepth, new_class->idepth) - 1; j > 0; --j) {
4624 if (mono_metadata_type_equal (&old_class->supertypes [j]->byval_arg, &new_class->supertypes [j]->byval_arg)) {
4625 match_class = old_class->supertypes [j];
4630 mono_class_setup_interfaces (old_class, &error);
4631 if (!mono_error_ok (&error)) {
4632 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));
4633 mono_error_cleanup (&error);
4636 mono_class_setup_interfaces (new_class, &error);
4637 if (!mono_error_ok (&error)) {
4638 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));
4639 mono_error_cleanup (&error);
4643 /* if old class is an interface that new class implements */
4644 if (old_class->flags & TYPE_ATTRIBUTE_INTERFACE) {
4645 if (verifier_class_is_assignable_from (old_class, new_class)) {
4646 match_class = old_class;
4649 for (j = 0; j < old_class->interface_count; ++j) {
4650 if (verifier_class_is_assignable_from (old_class->interfaces [j], new_class)) {
4651 match_class = old_class->interfaces [j];
4657 if (new_class->flags & TYPE_ATTRIBUTE_INTERFACE) {
4658 if (verifier_class_is_assignable_from (new_class, old_class)) {
4659 match_class = new_class;
4662 for (j = 0; j < new_class->interface_count; ++j) {
4663 if (verifier_class_is_assignable_from (new_class->interfaces [j], old_class)) {
4664 match_class = new_class->interfaces [j];
4670 //No decent super type found, use object
4671 match_class = mono_defaults.object_class;
4673 } 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)) {
4674 match_class = mono_defaults.object_class;
4679 char *old_name = stack_slot_full_name (old_slot);
4680 char *new_name = stack_slot_full_name (new_slot);
4681 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));
4685 set_stack_value (ctx, old_slot, &new_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4689 g_assert (match_class);
4690 set_stack_value (ctx, old_slot, &match_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4691 set_stack_value (ctx, new_slot, &match_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4697 to->flags |= IL_CODE_FLAG_WAS_TARGET;
4698 to->flags |= IL_CODE_STACK_MERGED;
4701 #define HANDLER_START(clause) ((clause)->flags == MONO_EXCEPTION_CLAUSE_FILTER ? (clause)->data.filter_offset : clause->handler_offset)
4702 #define IS_CATCH_OR_FILTER(clause) ((clause)->flags == MONO_EXCEPTION_CLAUSE_FILTER || (clause)->flags == MONO_EXCEPTION_CLAUSE_NONE)
4705 * is_clause_in_range :
4707 * Returns TRUE if either the protected block or the handler of @clause is in the @start - @end range.
4710 is_clause_in_range (MonoExceptionClause *clause, guint32 start, guint32 end)
4712 if (clause->try_offset >= start && clause->try_offset < end)
4714 if (HANDLER_START (clause) >= start && HANDLER_START (clause) < end)
4720 * is_clause_inside_range :
4722 * Returns TRUE if @clause lies completely inside the @start - @end range.
4725 is_clause_inside_range (MonoExceptionClause *clause, guint32 start, guint32 end)
4727 if (clause->try_offset < start || (clause->try_offset + clause->try_len) > end)
4729 if (HANDLER_START (clause) < start || (clause->handler_offset + clause->handler_len) > end)
4735 * is_clause_nested :
4737 * Returns TRUE if @nested is nested in @clause.
4740 is_clause_nested (MonoExceptionClause *clause, MonoExceptionClause *nested)
4742 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER && is_clause_inside_range (nested, clause->data.filter_offset, clause->handler_offset))
4744 return is_clause_inside_range (nested, clause->try_offset, clause->try_offset + clause->try_len) ||
4745 is_clause_inside_range (nested, clause->handler_offset, clause->handler_offset + clause->handler_len);
4748 /* Test the relationship between 2 exception clauses. Follow P.1 12.4.2.7 of ECMA
4749 * the each pair of exception must have the following properties:
4750 * - one is fully nested on another (the outer must not be a filter clause) (the nested one must come earlier)
4751 * - completely disjoin (none of the 3 regions of each entry overlap with the other 3)
4752 * - mutual protection (protected block is EXACT the same, handlers are disjoin and all handler are catch or all handler are filter)
4755 verify_clause_relationship (VerifyContext *ctx, MonoExceptionClause *clause, MonoExceptionClause *to_test)
4757 /*clause is nested*/
4758 if (to_test->flags == MONO_EXCEPTION_CLAUSE_FILTER && is_clause_inside_range (clause, to_test->data.filter_offset, to_test->handler_offset)) {
4759 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clause inside filter"));
4763 /*wrong nesting order.*/
4764 if (is_clause_nested (clause, to_test)) {
4765 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Nested exception clause appears after enclosing clause"));
4769 /*mutual protection*/
4770 if (clause->try_offset == to_test->try_offset && clause->try_len == to_test->try_len) {
4771 /*handlers are not disjoint*/
4772 if (is_clause_in_range (to_test, HANDLER_START (clause), clause->handler_offset + clause->handler_len)) {
4773 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception handlers overlap"));
4776 /* handlers are not catch or filter */
4777 if (!IS_CATCH_OR_FILTER (clause) || !IS_CATCH_OR_FILTER (to_test)) {
4778 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clauses with shared protected block are neither catch or filter"));
4785 /*not completelly disjoint*/
4786 if ((is_clause_in_range (to_test, clause->try_offset, clause->try_offset + clause->try_len) ||
4787 is_clause_in_range (to_test, HANDLER_START (clause), clause->handler_offset + clause->handler_len)) && !is_clause_nested (to_test, clause))
4788 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clauses overlap"));
4791 #define code_bounds_check(size) \
4792 if (ADDP_IS_GREATER_OR_OVF (ip, size, end)) {\
4793 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Code overrun starting with 0x%x at 0x%04x", *ip, ctx.ip_offset)); \
4798 mono_opcode_is_prefix (int op)
4801 case MONO_CEE_UNALIGNED_:
4802 case MONO_CEE_VOLATILE_:
4803 case MONO_CEE_TAIL_:
4804 case MONO_CEE_CONSTRAINED_:
4805 case MONO_CEE_READONLY_:
4812 * FIXME: need to distinguish between valid and verifiable.
4813 * Need to keep track of types on the stack.
4814 * Verify types for opcodes.
4817 mono_method_verify (MonoMethod *method, int level)
4820 const unsigned char *ip, *code_start;
4821 const unsigned char *end;
4822 MonoSimpleBasicBlock *bb = NULL, *original_bb = NULL;
4824 int i, n, need_merge = 0, start = 0;
4825 guint token, ip_offset = 0, prefix = 0;
4826 MonoGenericContext *generic_context = NULL;
4830 VERIFIER_DEBUG ( printf ("Verify IL for method %s %s %s\n", method->klass->name_space, method->klass->name, method->name); );
4832 init_verifier_stats ();
4834 if (method->iflags & (METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL | METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
4835 (method->flags & (METHOD_ATTRIBUTE_PINVOKE_IMPL | METHOD_ATTRIBUTE_ABSTRACT))) {
4839 memset (&ctx, 0, sizeof (VerifyContext));
4841 //FIXME use mono_method_get_signature_full
4842 ctx.signature = mono_method_signature (method);
4843 if (!ctx.signature) {
4844 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Could not decode method signature"));
4846 finish_collect_stats ();
4849 if (!method->is_generic && !method->klass->is_generic && ctx.signature->has_type_parameters) {
4850 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Method and signature don't match in terms of genericity"));
4851 finish_collect_stats ();
4855 ctx.header = mono_method_get_header (method);
4857 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Could not decode method header"));
4858 finish_collect_stats ();
4861 ctx.method = method;
4862 code_start = ip = ctx.header->code;
4863 end = ip + ctx.header->code_size;
4864 ctx.image = image = method->klass->image;
4867 ctx.max_args = ctx.signature->param_count + ctx.signature->hasthis;
4868 ctx.max_stack = ctx.header->max_stack;
4869 ctx.verifiable = ctx.valid = 1;
4872 ctx.code = g_new (ILCodeDesc, ctx.header->code_size);
4873 ctx.code_size = ctx.header->code_size;
4874 _MEM_ALLOC (sizeof (ILCodeDesc) * ctx.header->code_size);
4876 memset(ctx.code, 0, sizeof (ILCodeDesc) * ctx.header->code_size);
4878 ctx.num_locals = ctx.header->num_locals;
4879 ctx.locals = g_memdup (ctx.header->locals, sizeof (MonoType*) * ctx.header->num_locals);
4880 _MEM_ALLOC (sizeof (MonoType*) * ctx.header->num_locals);
4882 if (ctx.num_locals > 0 && !ctx.header->init_locals)
4883 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Method with locals variable but without init locals set"));
4885 ctx.params = g_new (MonoType*, ctx.max_args);
4886 _MEM_ALLOC (sizeof (MonoType*) * ctx.max_args);
4888 if (ctx.signature->hasthis)
4889 ctx.params [0] = method->klass->valuetype ? &method->klass->this_arg : &method->klass->byval_arg;
4890 memcpy (ctx.params + ctx.signature->hasthis, ctx.signature->params, sizeof (MonoType *) * ctx.signature->param_count);
4892 if (ctx.signature->is_inflated)
4893 ctx.generic_context = generic_context = mono_method_get_context (method);
4895 if (!generic_context && (method->klass->generic_container || method->is_generic)) {
4896 if (method->is_generic)
4897 ctx.generic_context = generic_context = &(mono_method_get_generic_container (method)->context);
4899 ctx.generic_context = generic_context = &method->klass->generic_container->context;
4902 for (i = 0; i < ctx.num_locals; ++i) {
4903 MonoType *uninflated = ctx.locals [i];
4904 ctx.locals [i] = mono_class_inflate_generic_type_checked (ctx.locals [i], ctx.generic_context, &error);
4905 if (!mono_error_ok (&error)) {
4906 char *name = mono_type_full_name (ctx.locals [i] ? ctx.locals [i] : uninflated);
4907 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid local %d of type %s", i, name));
4909 mono_error_cleanup (&error);
4910 /* we must not free (in cleanup) what was not yet allocated (but only copied) */
4916 for (i = 0; i < ctx.max_args; ++i) {
4917 MonoType *uninflated = ctx.params [i];
4918 ctx.params [i] = mono_class_inflate_generic_type_checked (ctx.params [i], ctx.generic_context, &error);
4919 if (!mono_error_ok (&error)) {
4920 char *name = mono_type_full_name (ctx.params [i] ? ctx.params [i] : uninflated);
4921 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid parameter %d of type %s", i, name));
4923 mono_error_cleanup (&error);
4924 /* we must not free (in cleanup) what was not yet allocated (but only copied) */
4929 stack_init (&ctx, &ctx.eval);
4931 for (i = 0; i < ctx.num_locals; ++i) {
4932 if (!mono_type_is_valid_in_context (&ctx, ctx.locals [i]))
4934 if (get_stack_type (ctx.locals [i]) == TYPE_INV) {
4935 char *name = mono_type_full_name (ctx.locals [i]);
4936 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid local %i of type %s", i, name));
4943 for (i = 0; i < ctx.max_args; ++i) {
4944 if (!mono_type_is_valid_in_context (&ctx, ctx.params [i]))
4947 if (get_stack_type (ctx.params [i]) == TYPE_INV) {
4948 char *name = mono_type_full_name (ctx.params [i]);
4949 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid parameter %i of type %s", i, name));
4958 for (i = 0; i < ctx.header->num_clauses && ctx.valid; ++i) {
4959 MonoExceptionClause *clause = ctx.header->clauses + i;
4960 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); );
4962 if (clause->try_offset > ctx.code_size || ADD_IS_GREATER_OR_OVF (clause->try_offset, clause->try_len, ctx.code_size))
4963 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try clause out of bounds at 0x%04x", clause->try_offset));
4965 if (clause->try_len <= 0)
4966 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try clause len <= 0 at 0x%04x", clause->try_offset));
4968 if (clause->handler_offset > ctx.code_size || ADD_IS_GREATER_OR_OVF (clause->handler_offset, clause->handler_len, ctx.code_size))
4969 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("handler clause out of bounds at 0x%04x", clause->try_offset));
4971 if (clause->handler_len <= 0)
4972 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("handler clause len <= 0 at 0x%04x", clause->try_offset));
4974 if (clause->try_offset < clause->handler_offset && ADD_IS_GREATER_OR_OVF (clause->try_offset, clause->try_len, HANDLER_START (clause)))
4975 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try block (at 0x%04x) includes handler block (at 0x%04x)", clause->try_offset, clause->handler_offset));
4977 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
4978 if (clause->data.filter_offset > ctx.code_size)
4979 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("filter clause out of bounds at 0x%04x", clause->try_offset));
4981 if (clause->data.filter_offset >= clause->handler_offset)
4982 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("filter clause must come before the handler clause at 0x%04x", clause->data.filter_offset));
4985 for (n = i + 1; n < ctx.header->num_clauses && ctx.valid; ++n)
4986 verify_clause_relationship (&ctx, clause, ctx.header->clauses + n);
4991 ctx.code [clause->try_offset].flags |= IL_CODE_FLAG_WAS_TARGET;
4992 if (clause->try_offset + clause->try_len < ctx.code_size)
4993 ctx.code [clause->try_offset + clause->try_len].flags |= IL_CODE_FLAG_WAS_TARGET;
4994 if (clause->handler_offset + clause->handler_len < ctx.code_size)
4995 ctx.code [clause->handler_offset + clause->handler_len].flags |= IL_CODE_FLAG_WAS_TARGET;
4997 if (clause->flags == MONO_EXCEPTION_CLAUSE_NONE) {
4998 if (!clause->data.catch_class) {
4999 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Catch clause %d with invalid type", i));
5002 if (!mono_type_is_valid_in_context (&ctx, &clause->data.catch_class->byval_arg))
5005 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->handler_offset, clause->data.catch_class);
5007 else if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
5008 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->data.filter_offset, mono_defaults.exception_class);
5009 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->handler_offset, mono_defaults.exception_class);
5016 original_bb = bb = mono_basic_block_split (method, &error);
5017 if (!mono_error_ok (&error)) {
5018 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid branch target: %s", mono_error_get_message (&error)));
5019 mono_error_cleanup (&error);
5024 while (ip < end && ctx.valid) {
5026 ip_offset = (guint) (ip - code_start);
5028 const unsigned char *ip_copy = ip;
5031 if (ip_offset > bb->end) {
5032 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or EH block at [0x%04x] targets middle instruction at 0x%04x", bb->end, ip_offset));
5036 if (ip_offset == bb->end)
5039 op_size = mono_opcode_value_and_size (&ip_copy, end, &op);
5040 if (op_size == -1) {
5041 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction %x at 0x%04x", *ip, ip_offset));
5045 if (ADD_IS_GREATER_OR_OVF (ip_offset, op_size, bb->end)) {
5046 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or EH block targets middle of instruction at 0x%04x", ip_offset));
5050 /*Last Instruction*/
5051 if (ip_offset + op_size == bb->end && mono_opcode_is_prefix (op)) {
5052 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));
5057 ctx.ip_offset = ip_offset = (guint) (ip - code_start);
5059 /*We need to check against fallthrou in and out of protected blocks.
5060 * For fallout we check the once a protected block ends, if the start flag is not set.
5061 * Likewise for fallthru in, we check if ip is the start of a protected block and start is not set
5062 * TODO convert these checks to be done using flags and not this loop
5064 for (i = 0; i < ctx.header->num_clauses && ctx.valid; ++i) {
5065 MonoExceptionClause *clause = ctx.header->clauses + i;
5067 if ((clause->try_offset + clause->try_len == ip_offset) && start == 0) {
5068 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallthru off try block at 0x%04x", ip_offset));
5072 if ((clause->handler_offset + clause->handler_len == ip_offset) && start == 0) {
5073 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER)
5074 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("fallout of handler block at 0x%04x", ip_offset));
5076 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallout of handler block at 0x%04x", ip_offset));
5080 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER && clause->handler_offset == ip_offset && start == 0) {
5081 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("fallout of filter block at 0x%04x", ip_offset));
5085 if (clause->handler_offset == ip_offset && start == 0) {
5086 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallthru handler block at 0x%04x", ip_offset));
5090 if (clause->try_offset == ip_offset && ctx.eval.size > 0 && start == 0) {
5091 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Try to enter try block with a non-empty stack at 0x%04x", ip_offset));
5096 /*This must be done after fallthru detection otherwise it won't happen.*/
5098 /*FIXME remove this once we move all bad branch checking code to use BB only*/
5099 ctx.code [ip_offset].flags |= IL_CODE_FLAG_SEEN;
5108 VERIFIER_DEBUG ( printf ("extra merge needed! 0x%04x \n", ctx.target); );
5109 merge_stacks (&ctx, &ctx.eval, &ctx.code [ctx.target], FALSE, TRUE);
5112 merge_stacks (&ctx, &ctx.eval, &ctx.code[ip_offset], start, FALSE);
5115 /*TODO we can fast detect a forward branch or exception block targeting code after prefix, we should fail fast*/
5116 #ifdef MONO_VERIFIER_DEBUG
5119 discode = mono_disasm_code_one (NULL, method, ip, NULL);
5120 discode [strlen (discode) - 1] = 0; /* no \n */
5121 g_print ("[%d] %-29s (%d)\n", ip_offset, discode, ctx.eval.size);
5124 dump_stack_state (&ctx.code [ip_offset]);
5125 dump_stack_state (&ctx.eval);
5138 push_arg (&ctx, *ip - CEE_LDARG_0, FALSE);
5144 code_bounds_check (2);
5145 push_arg (&ctx, ip [1], *ip == CEE_LDARGA_S);
5149 case CEE_ADD_OVF_UN:
5150 do_binop (&ctx, *ip, add_ovf_un_table);
5154 case CEE_SUB_OVF_UN:
5155 do_binop (&ctx, *ip, sub_ovf_un_table);
5162 case CEE_MUL_OVF_UN:
5163 do_binop (&ctx, *ip, bin_ovf_table);
5168 do_binop (&ctx, *ip, add_table);
5173 do_binop (&ctx, *ip, sub_table);
5180 do_binop (&ctx, *ip, bin_op_table);
5189 do_binop (&ctx, *ip, int_bin_op_table);
5196 do_binop (&ctx, *ip, shift_op_table);
5201 if (!check_underflow (&ctx, 1))
5203 stack_pop_safe (&ctx);
5217 /*TODO support definite assignment verification? */
5218 push_local (&ctx, *ip - CEE_LDLOC_0, FALSE);
5226 store_local (&ctx, *ip - CEE_STLOC_0);
5231 code_bounds_check (2);
5232 store_local (&ctx, ip [1]);
5237 code_bounds_check (2);
5238 store_arg (&ctx, ip [1]);
5252 if (check_overflow (&ctx))
5253 stack_push_val (&ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
5258 code_bounds_check (2);
5259 if (check_overflow (&ctx))
5260 stack_push_val (&ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
5265 code_bounds_check (5);
5266 if (check_overflow (&ctx))
5267 stack_push_val (&ctx,TYPE_I4, &mono_defaults.int32_class->byval_arg);
5272 code_bounds_check (9);
5273 if (check_overflow (&ctx))
5274 stack_push_val (&ctx,TYPE_I8, &mono_defaults.int64_class->byval_arg);
5279 code_bounds_check (5);
5280 if (check_overflow (&ctx))
5281 stack_push_val (&ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
5286 code_bounds_check (9);
5287 if (check_overflow (&ctx))
5288 stack_push_val (&ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
5293 if (check_overflow (&ctx))
5294 stack_push_val (&ctx, TYPE_COMPLEX | NULL_LITERAL_MASK, &mono_defaults.object_class->byval_arg);
5300 code_bounds_check (2);
5301 do_branch_op (&ctx, (signed char)ip [1] + 2, cmp_br_eq_op);
5314 code_bounds_check (2);
5315 do_branch_op (&ctx, (signed char)ip [1] + 2, cmp_br_op);
5322 code_bounds_check (5);
5323 do_branch_op (&ctx, (gint32)read32 (ip + 1) + 5, cmp_br_eq_op);
5336 code_bounds_check (5);
5337 do_branch_op (&ctx, (gint32)read32 (ip + 1) + 5, cmp_br_op);
5344 code_bounds_check (2);
5345 push_local (&ctx, ip[1], *ip == CEE_LDLOCA_S);
5350 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5356 if (!check_underflow (&ctx, 1))
5358 if (!check_overflow (&ctx))
5360 top = stack_push (&ctx);
5361 copy_stack_value (top, stack_peek (&ctx, 1));
5367 code_bounds_check (5);
5369 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Eval stack must be empty in jmp at 0x%04x", ip_offset));
5370 token = read32 (ip + 1);
5371 if (in_any_block (ctx.header, ip_offset))
5372 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("jmp cannot escape exception blocks at 0x%04x", ip_offset));
5374 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Intruction jmp is not verifiable at 0x%04x", ctx.ip_offset));
5376 * FIXME: check signature, retval, arguments etc.
5382 code_bounds_check (5);
5383 do_invoke_method (&ctx, read32 (ip + 1), *ip == CEE_CALLVIRT);
5388 code_bounds_check (5);
5389 token = read32 (ip + 1);
5391 * FIXME: check signature, retval, arguments etc.
5392 * FIXME: check requirements for tail call
5394 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Intruction calli is not verifiable at 0x%04x", ctx.ip_offset));
5398 code_bounds_check (2);
5399 do_static_branch (&ctx, (signed char)ip [1] + 2);
5407 code_bounds_check (2);
5408 do_boolean_branch_op (&ctx, (signed char)ip [1] + 2);
5414 code_bounds_check (5);
5415 do_static_branch (&ctx, (gint32)read32 (ip + 1) + 5);
5423 code_bounds_check (5);
5424 do_boolean_branch_op (&ctx, (gint32)read32 (ip + 1) + 5);
5431 code_bounds_check (5);
5432 entries = read32 (ip + 1);
5434 if (entries > 0xFFFFFFFFU / sizeof (guint32))
5435 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Too many switch entries %x at 0x%04x", entries, ctx.ip_offset));
5438 code_bounds_check (sizeof (guint32) * entries);
5440 do_switch (&ctx, entries, ip);
5441 ip += sizeof (guint32) * entries;
5455 do_load_indirect (&ctx, *ip);
5467 do_store_indirect (&ctx, *ip);
5473 do_unary_math_op (&ctx, *ip);
5483 do_conversion (&ctx, TYPE_I4);
5489 do_conversion (&ctx, TYPE_I8);
5496 do_conversion (&ctx, TYPE_R8);
5502 do_conversion (&ctx, TYPE_NATIVE_INT);
5507 code_bounds_check (5);
5508 do_cpobj (&ctx, read32 (ip + 1));
5513 code_bounds_check (5);
5514 do_ldobj_value (&ctx, read32 (ip + 1));
5519 code_bounds_check (5);
5520 do_ldstr (&ctx, read32 (ip + 1));
5525 code_bounds_check (5);
5526 do_newobj (&ctx, read32 (ip + 1));
5532 code_bounds_check (5);
5533 do_cast (&ctx, read32 (ip + 1), *ip == CEE_CASTCLASS ? "castclass" : "isinst");
5539 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5544 code_bounds_check (5);
5545 do_unbox_value (&ctx, read32 (ip + 1));
5557 code_bounds_check (5);
5558 do_push_field (&ctx, read32 (ip + 1), *ip == CEE_LDFLDA);
5564 code_bounds_check (5);
5565 do_push_static_field (&ctx, read32 (ip + 1), *ip == CEE_LDSFLDA);
5570 code_bounds_check (5);
5571 do_store_field (&ctx, read32 (ip + 1));
5576 code_bounds_check (5);
5577 do_store_static_field (&ctx, read32 (ip + 1));
5582 code_bounds_check (5);
5583 do_stobj (&ctx, read32 (ip + 1));
5587 case CEE_CONV_OVF_I1_UN:
5588 case CEE_CONV_OVF_I2_UN:
5589 case CEE_CONV_OVF_I4_UN:
5590 case CEE_CONV_OVF_U1_UN:
5591 case CEE_CONV_OVF_U2_UN:
5592 case CEE_CONV_OVF_U4_UN:
5593 do_conversion (&ctx, TYPE_I4);
5597 case CEE_CONV_OVF_I8_UN:
5598 case CEE_CONV_OVF_U8_UN:
5599 do_conversion (&ctx, TYPE_I8);
5603 case CEE_CONV_OVF_I_UN:
5604 case CEE_CONV_OVF_U_UN:
5605 do_conversion (&ctx, TYPE_NATIVE_INT);
5610 code_bounds_check (5);
5611 do_box_value (&ctx, read32 (ip + 1));
5616 code_bounds_check (5);
5617 do_newarr (&ctx, read32 (ip + 1));
5627 code_bounds_check (5);
5628 do_ldelema (&ctx, read32 (ip + 1));
5642 case CEE_LDELEM_REF:
5643 do_ldelem (&ctx, *ip, 0);
5654 case CEE_STELEM_REF:
5655 do_stelem (&ctx, *ip, 0);
5660 code_bounds_check (5);
5661 do_ldelem (&ctx, *ip, read32 (ip + 1));
5666 code_bounds_check (5);
5667 do_stelem (&ctx, *ip, read32 (ip + 1));
5672 code_bounds_check (5);
5673 do_unbox_any (&ctx, read32 (ip + 1));
5677 case CEE_CONV_OVF_I1:
5678 case CEE_CONV_OVF_U1:
5679 case CEE_CONV_OVF_I2:
5680 case CEE_CONV_OVF_U2:
5681 case CEE_CONV_OVF_I4:
5682 case CEE_CONV_OVF_U4:
5683 do_conversion (&ctx, TYPE_I4);
5687 case CEE_CONV_OVF_I8:
5688 case CEE_CONV_OVF_U8:
5689 do_conversion (&ctx, TYPE_I8);
5693 case CEE_CONV_OVF_I:
5694 case CEE_CONV_OVF_U:
5695 do_conversion (&ctx, TYPE_NATIVE_INT);
5700 code_bounds_check (5);
5701 do_refanyval (&ctx, read32 (ip + 1));
5711 code_bounds_check (5);
5712 do_mkrefany (&ctx, read32 (ip + 1));
5717 code_bounds_check (5);
5718 do_load_token (&ctx, read32 (ip + 1));
5722 case CEE_ENDFINALLY:
5723 if (!is_correct_endfinally (ctx.header, ip_offset))
5724 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("endfinally must be used inside a finally/fault handler at 0x%04x", ctx.ip_offset));
5731 code_bounds_check (5);
5732 do_leave (&ctx, read32 (ip + 1) + 5);
5739 code_bounds_check (2);
5740 do_leave (&ctx, (signed char)ip [1] + 2);
5747 code_bounds_check (2);
5751 code_bounds_check (3);
5752 store_local (&ctx, read16 (ip + 1));
5757 do_cmp_op (&ctx, cmp_br_eq_op, *ip);
5765 do_cmp_op (&ctx, cmp_br_op, *ip);
5770 code_bounds_check (3);
5771 store_arg (&ctx, read16 (ip + 1) );
5777 if (!check_overflow (&ctx))
5779 if (ctx.signature->call_convention != MONO_CALL_VARARG)
5780 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Cannot use arglist on method without VARGARG calling convention at 0x%04x", ctx.ip_offset));
5781 set_stack_value (&ctx, stack_push (&ctx), &mono_defaults.argumenthandle_class->byval_arg, FALSE);
5786 code_bounds_check (5);
5787 do_load_function_ptr (&ctx, read32 (ip + 1), FALSE);
5792 code_bounds_check (5);
5793 do_load_function_ptr (&ctx, read32 (ip + 1), TRUE);
5799 code_bounds_check (3);
5800 push_arg (&ctx, read16 (ip + 1), *ip == CEE_LDARGA);
5806 code_bounds_check (3);
5807 push_local (&ctx, read16 (ip + 1), *ip == CEE_LDLOCA);
5820 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5824 do_endfilter (&ctx);
5828 case CEE_UNALIGNED_:
5829 code_bounds_check (2);
5830 prefix |= PREFIX_UNALIGNED;
5834 prefix |= PREFIX_VOLATILE;
5838 prefix |= PREFIX_TAIL;
5840 if (ip < end && (*ip != CEE_CALL && *ip != CEE_CALLI && *ip != CEE_CALLVIRT))
5841 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("tail prefix must be used only with call opcodes at 0x%04x", ip_offset));
5845 code_bounds_check (5);
5846 do_initobj (&ctx, read32 (ip + 1));
5850 case CEE_CONSTRAINED_:
5851 code_bounds_check (5);
5852 ctx.constrained_type = get_boxable_mono_type (&ctx, read32 (ip + 1), "constrained.");
5853 prefix |= PREFIX_CONSTRAINED;
5858 prefix |= PREFIX_READONLY;
5863 CLEAR_PREFIX (&ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
5864 if (!check_underflow (&ctx, 3))
5866 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Instruction cpblk is not verifiable at 0x%04x", ctx.ip_offset));
5871 CLEAR_PREFIX (&ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
5872 if (!check_underflow (&ctx, 3))
5874 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Instruction initblk is not verifiable at 0x%04x", ctx.ip_offset));
5882 if (!is_correct_rethrow (ctx.header, ip_offset))
5883 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("rethrow must be used inside a catch handler at 0x%04x", ctx.ip_offset));
5890 code_bounds_check (5);
5891 do_sizeof (&ctx, read32 (ip + 1));
5895 case CEE_REFANYTYPE:
5896 do_refanytype (&ctx);
5901 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction FE %x at 0x%04x", *ip, ctx.ip_offset));
5907 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction %x at 0x%04x", *ip, ctx.ip_offset));
5911 /*TODO we can fast detect a forward branch or exception block targeting code after prefix, we should fail fast*/
5913 if (!ctx.prefix_set) //first prefix
5914 ctx.code [ctx.ip_offset].flags |= IL_CODE_FLAG_SEEN;
5915 ctx.prefix_set |= prefix;
5916 ctx.has_flags = TRUE;
5920 ctx.code [ctx.ip_offset].flags |= IL_CODE_FLAG_SEEN;
5922 if (ctx.prefix_set & PREFIX_CONSTRAINED)
5923 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after constrained prefix at 0x%04x", ctx.ip_offset));
5924 if (ctx.prefix_set & PREFIX_READONLY)
5925 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after readonly prefix at 0x%04x", ctx.ip_offset));
5926 if (ctx.prefix_set & PREFIX_VOLATILE)
5927 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after volatile prefix at 0x%04x", ctx.ip_offset));
5928 if (ctx.prefix_set & PREFIX_UNALIGNED)
5929 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after unaligned prefix at 0x%04x", ctx.ip_offset));
5930 ctx.prefix_set = prefix = 0;
5931 ctx.has_flags = FALSE;
5935 * if ip != end we overflowed: mark as error.
5937 if ((ip != end || !start) && ctx.verifiable && !ctx.list) {
5938 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Run ahead of method code at 0x%04x", ip_offset));
5941 /*We should guard against the last decoded opcode, otherwise we might add errors that doesn't make sense.*/
5942 for (i = 0; i < ctx.code_size && i < ip_offset; ++i) {
5943 if (ctx.code [i].flags & IL_CODE_FLAG_WAS_TARGET) {
5944 if (!(ctx.code [i].flags & IL_CODE_FLAG_SEEN))
5945 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or exception block target middle of intruction at 0x%04x", i));
5947 if (ctx.code [i].flags & IL_CODE_DELEGATE_SEQUENCE)
5948 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Branch to delegate code sequence at 0x%04x", i));
5950 if ((ctx.code [i].flags & IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL) && ctx.has_this_store)
5951 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Invalid ldftn with virtual function in method with stdarg 0 at 0x%04x", i));
5953 if ((ctx.code [i].flags & IL_CODE_CALL_NONFINAL_VIRTUAL) && ctx.has_this_store)
5954 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));
5957 if (mono_method_is_constructor (ctx.method) && !ctx.super_ctor_called && !ctx.method->klass->valuetype && ctx.method->klass != mono_defaults.object_class) {
5958 char *method_name = mono_method_full_name (ctx.method, TRUE);
5959 char *type = mono_type_get_full_name (ctx.method->klass);
5960 if (ctx.method->klass->parent && ctx.method->klass->parent->exception_type != MONO_EXCEPTION_NONE)
5961 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));
5963 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Constructor %s for type %s not calling base type ctor.", method_name, type));
5964 g_free (method_name);
5970 for (i = 0; i < ctx.header->code_size; ++i) {
5971 if (ctx.code [i].stack)
5972 g_free (ctx.code [i].stack);
5976 for (tmp = ctx.funptrs; tmp; tmp = tmp->next)
5978 g_slist_free (ctx.funptrs);
5980 for (tmp = ctx.exception_types; tmp; tmp = tmp->next)
5981 mono_metadata_free_type (tmp->data);
5982 g_slist_free (ctx.exception_types);
5984 for (i = 0; i < ctx.num_locals; ++i) {
5986 mono_metadata_free_type (ctx.locals [i]);
5988 for (i = 0; i < ctx.max_args; ++i) {
5990 mono_metadata_free_type (ctx.params [i]);
5994 g_free (ctx.eval.stack);
5997 g_free (ctx.locals);
5998 g_free (ctx.params);
5999 mono_basic_block_free (original_bb);
6000 mono_metadata_free_mh (ctx.header);
6002 finish_collect_stats ();
6007 mono_verify_corlib ()
6009 /* This is a public API function so cannot be removed */
6014 * Returns true if @method needs to be verified.
6018 mono_verifier_is_enabled_for_method (MonoMethod *method)
6020 return mono_verifier_is_enabled_for_class (method->klass) && (method->wrapper_type == MONO_WRAPPER_NONE || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD);
6024 * Returns true if @klass need to be verified.
6028 mono_verifier_is_enabled_for_class (MonoClass *klass)
6030 return verify_all || (verifier_mode > MONO_VERIFIER_MODE_OFF && !(klass->image->assembly && klass->image->assembly->in_gac) && klass->image != mono_defaults.corlib);
6034 mono_verifier_is_enabled_for_image (MonoImage *image)
6036 return verify_all || verifier_mode > MONO_VERIFIER_MODE_OFF;
6040 * Dynamic methods are not considered full trust since if the user is trusted and need to
6041 * generate unsafe code, make the method skip verification - this is a known good way to do it.
6044 mono_verifier_is_method_full_trust (MonoMethod *method)
6046 return mono_verifier_is_class_full_trust (method->klass) && !method_is_dynamic (method);
6050 * Returns if @klass is under full trust or not.
6052 * TODO This code doesn't take CAS into account.
6054 * Under verify_all all user code must be verifiable if no security option was set
6058 mono_verifier_is_class_full_trust (MonoClass *klass)
6060 /* under CoreCLR code is trusted if it is part of the "platform" otherwise all code inside the GAC is trusted */
6061 gboolean trusted_location = !mono_security_core_clr_enabled () ?
6062 (klass->image->assembly && klass->image->assembly->in_gac) : mono_security_core_clr_is_platform_image (klass->image);
6064 if (verify_all && verifier_mode == MONO_VERIFIER_MODE_OFF)
6065 return trusted_location || klass->image == mono_defaults.corlib;
6066 return verifier_mode < MONO_VERIFIER_MODE_VERIFIABLE || trusted_location || klass->image == mono_defaults.corlib;
6070 mono_method_verify_with_current_settings (MonoMethod *method, gboolean skip_visibility, gboolean is_fulltrust)
6072 return mono_method_verify (method,
6073 (verifier_mode != MONO_VERIFIER_MODE_STRICT ? MONO_VERIFY_NON_STRICT: 0)
6074 | (!is_fulltrust && !mono_verifier_is_method_full_trust (method) ? MONO_VERIFY_FAIL_FAST : 0)
6075 | (skip_visibility ? MONO_VERIFY_SKIP_VISIBILITY : 0));
6079 get_field_end (MonoClassField *field)
6082 int size = mono_type_size (field->type, &align);
6084 size = 4; /*FIXME Is this a safe bet?*/
6085 return size + field->offset;
6089 verify_class_for_overlapping_reference_fields (MonoClass *class)
6092 gpointer iter = NULL;
6093 MonoClassField *field;
6094 gboolean is_fulltrust = mono_verifier_is_class_full_trust (class);
6095 /*We can't skip types with !has_references since this is calculated after we have run.*/
6096 if (!((class->flags & TYPE_ATTRIBUTE_LAYOUT_MASK) == TYPE_ATTRIBUTE_EXPLICIT_LAYOUT))
6100 /*We must check for stuff overlapping reference fields.
6101 The outer loop uses mono_class_get_fields to ensure that MonoClass:fields get inited.
6103 while ((field = mono_class_get_fields (class, &iter))) {
6104 int fieldEnd = get_field_end (field);
6105 gboolean is_valuetype = !MONO_TYPE_IS_REFERENCE (field->type);
6108 if (mono_field_is_deleted (field) || (field->type->attrs & FIELD_ATTRIBUTE_STATIC))
6111 for (j = i; j < class->field.count; ++j) {
6112 MonoClassField *other = &class->fields [j];
6113 int otherEnd = get_field_end (other);
6114 if (mono_field_is_deleted (other) || (is_valuetype && !MONO_TYPE_IS_REFERENCE (other->type)) || (other->type->attrs & FIELD_ATTRIBUTE_STATIC))
6117 if (!is_valuetype && MONO_TYPE_IS_REFERENCE (other->type) && field->offset == other->offset && is_fulltrust)
6120 if ((otherEnd > field->offset && otherEnd <= fieldEnd) || (other->offset >= field->offset && other->offset < fieldEnd))
6128 field_hash (gconstpointer key)
6130 const MonoClassField *field = key;
6131 return g_str_hash (field->name) ^ mono_metadata_type_hash (field->type); /**/
6135 field_equals (gconstpointer _a, gconstpointer _b)
6137 const MonoClassField *a = _a;
6138 const MonoClassField *b = _b;
6139 return !strcmp (a->name, b->name) && mono_metadata_type_equal (a->type, b->type);
6144 verify_class_fields (MonoClass *class)
6146 gpointer iter = NULL;
6147 MonoClassField *field;
6148 MonoGenericContext *context = mono_class_get_context (class);
6149 GHashTable *unique_fields = g_hash_table_new_full (&field_hash, &field_equals, NULL, NULL);
6150 if (class->generic_container)
6151 context = &class->generic_container->context;
6153 while ((field = mono_class_get_fields (class, &iter)) != NULL) {
6154 if (!mono_type_is_valid_type_in_context (field->type, context)) {
6155 g_hash_table_destroy (unique_fields);
6158 if (g_hash_table_lookup (unique_fields, field)) {
6159 g_hash_table_destroy (unique_fields);
6162 g_hash_table_insert (unique_fields, field, field);
6164 g_hash_table_destroy (unique_fields);
6169 verify_interfaces (MonoClass *class)
6172 for (i = 0; i < class->interface_count; ++i) {
6173 MonoClass *iface = class->interfaces [i];
6174 if (!(iface->flags & TYPE_ATTRIBUTE_INTERFACE))
6181 verify_valuetype_layout_with_target (MonoClass *class, MonoClass *target_class)
6184 gpointer iter = NULL;
6185 MonoClassField *field;
6186 MonoClass *field_class;
6188 if (!class->valuetype)
6191 type = class->byval_arg.type;
6192 /*primitive type fields are not properly decoded*/
6193 if ((type >= MONO_TYPE_BOOLEAN && type <= MONO_TYPE_R8) || (type >= MONO_TYPE_I && type <= MONO_TYPE_U))
6196 while ((field = mono_class_get_fields (class, &iter)) != NULL) {
6200 if (field->type->attrs & (FIELD_ATTRIBUTE_STATIC | FIELD_ATTRIBUTE_HAS_FIELD_RVA))
6203 field_class = mono_class_get_generic_type_definition (mono_class_from_mono_type (field->type));
6205 if (field_class == target_class || class == field_class || !verify_valuetype_layout_with_target (field_class, target_class))
6213 verify_valuetype_layout (MonoClass *class)
6216 res = verify_valuetype_layout_with_target (class, class);
6221 recursive_mark_constraint_args (MonoBitSet *used_args, MonoGenericContainer *gc, MonoType *type)
6224 MonoClass **constraints;
6225 MonoGenericParamInfo *param_info;
6227 g_assert (mono_type_is_generic_argument (type));
6229 idx = mono_type_get_generic_param_num (type);
6230 if (mono_bitset_test_fast (used_args, idx))
6233 mono_bitset_set_fast (used_args, idx);
6234 param_info = mono_generic_container_get_param_info (gc, idx);
6236 if (!param_info->constraints)
6239 for (constraints = param_info->constraints; *constraints; ++constraints) {
6240 MonoClass *ctr = *constraints;
6241 MonoType *constraint_type = &ctr->byval_arg;
6243 if (mono_type_is_generic_argument (constraint_type) && !recursive_mark_constraint_args (used_args, gc, constraint_type))
6250 verify_generic_parameters (MonoClass *class)
6253 MonoGenericContainer *gc = class->generic_container;
6254 MonoBitSet *used_args = mono_bitset_new (gc->type_argc, 0);
6256 for (i = 0; i < gc->type_argc; ++i) {
6257 MonoGenericParamInfo *param_info = mono_generic_container_get_param_info (gc, i);
6258 MonoClass **constraints;
6260 if (!param_info->constraints)
6263 mono_bitset_clear_all (used_args);
6264 mono_bitset_set_fast (used_args, i);
6266 for (constraints = param_info->constraints; *constraints; ++constraints) {
6267 MonoClass *ctr = *constraints;
6268 MonoType *constraint_type = &ctr->byval_arg;
6270 if (!mono_class_can_access_class (class, ctr))
6273 if (!mono_type_is_valid_type_in_context (constraint_type, &gc->context))
6276 if (mono_type_is_generic_argument (constraint_type) && !recursive_mark_constraint_args (used_args, gc, constraint_type))
6278 if (ctr->generic_class && !mono_class_is_valid_generic_instantiation (NULL, ctr))
6282 mono_bitset_free (used_args);
6286 mono_bitset_free (used_args);
6291 * Check if the class is verifiable.
6293 * Right now there are no conditions that make a class a valid but not verifiable. Both overlapping reference
6294 * field and invalid generic instantiation are fatal errors.
6296 * This method must be safe to be called from mono_class_init and all code must be carefull about that.
6300 mono_verifier_verify_class (MonoClass *class)
6302 /*Neither <Module>, object or ifaces have parent.*/
6303 if (!class->parent &&
6304 class != mono_defaults.object_class &&
6305 !MONO_CLASS_IS_INTERFACE (class) &&
6306 (!image_is_dynamic (class->image) && class->type_token != 0x2000001)) /*<Module> is the first type in the assembly*/
6308 if (class->parent) {
6309 if (MONO_CLASS_IS_INTERFACE (class->parent))
6311 if (!class->generic_class && class->parent->generic_container)
6313 if (class->parent->generic_class && !class->generic_class) {
6314 MonoGenericContext *context = mono_class_get_context (class);
6315 if (class->generic_container)
6316 context = &class->generic_container->context;
6317 if (!mono_type_is_valid_type_in_context (&class->parent->byval_arg, context))
6321 if (class->generic_container && (class->flags & TYPE_ATTRIBUTE_LAYOUT_MASK) == TYPE_ATTRIBUTE_EXPLICIT_LAYOUT)
6323 if (class->generic_container && !verify_generic_parameters (class))
6325 if (!verify_class_for_overlapping_reference_fields (class))
6327 if (class->generic_class && !mono_class_is_valid_generic_instantiation (NULL, class))
6329 if (class->generic_class == NULL && !verify_class_fields (class))
6331 if (class->valuetype && !verify_valuetype_layout (class))
6333 if (!verify_interfaces (class))
6339 mono_verifier_class_is_valid_generic_instantiation (MonoClass *class)
6341 return mono_class_is_valid_generic_instantiation (NULL, class);
6345 mono_verifier_is_method_valid_generic_instantiation (MonoMethod *method)
6347 if (!method->is_inflated)
6349 return mono_method_is_valid_generic_instantiation (NULL, method);
6355 mono_verifier_verify_class (MonoClass *class)
6357 /* The verifier was disabled at compile time */
6362 mono_method_verify_with_current_settings (MonoMethod *method, gboolean skip_visibility, gboolean is_fulltrust)
6364 /* The verifier was disabled at compile time */
6369 mono_verifier_is_class_full_trust (MonoClass *klass)
6371 /* The verifier was disabled at compile time */
6376 mono_verifier_is_method_full_trust (MonoMethod *method)
6378 /* The verifier was disabled at compile time */
6383 mono_verifier_is_enabled_for_image (MonoImage *image)
6385 /* The verifier was disabled at compile time */
6390 mono_verifier_is_enabled_for_class (MonoClass *klass)
6392 /* The verifier was disabled at compile time */
6397 mono_verifier_is_enabled_for_method (MonoMethod *method)
6399 /* The verifier was disabled at compile time */
6404 mono_method_verify (MonoMethod *method, int level)
6406 /* The verifier was disabled at compile time */
6411 mono_free_verify_list (GSList *list)
6413 /* The verifier was disabled at compile time */
6414 /* will always be null if verifier is disabled */
6418 mono_verifier_class_is_valid_generic_instantiation (MonoClass *class)
6424 mono_verifier_is_method_valid_generic_instantiation (MonoMethod *method)