5 * Mono Project (http://www.mono-project.com)
7 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
8 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
9 * Copyright 2011 Rodrigo Kumpera
13 #include <mono/metadata/object-internals.h>
14 #include <mono/metadata/verify.h>
15 #include <mono/metadata/verify-internals.h>
16 #include <mono/metadata/opcodes.h>
17 #include <mono/metadata/tabledefs.h>
18 #include <mono/metadata/reflection.h>
19 #include <mono/metadata/debug-helpers.h>
20 #include <mono/metadata/mono-endian.h>
21 #include <mono/metadata/metadata.h>
22 #include <mono/metadata/metadata-internals.h>
23 #include <mono/metadata/class-internals.h>
24 #include <mono/metadata/security-manager.h>
25 #include <mono/metadata/security-core-clr.h>
26 #include <mono/metadata/tokentype.h>
27 #include <mono/metadata/mono-basic-block.h>
28 #include <mono/metadata/attrdefs.h>
29 #include <mono/utils/mono-counters.h>
30 #include <mono/utils/monobitset.h>
35 static MiniVerifierMode verifier_mode = MONO_VERIFIER_MODE_OFF;
36 static gboolean verify_all = FALSE;
39 * Set the desired level of checks for the verfier.
43 mono_verifier_set_mode (MiniVerifierMode mode)
49 mono_verifier_enable_verify_all ()
54 #ifndef DISABLE_VERIFIER
56 * Pull the list of opcodes
58 #define OPDEF(a,b,c,d,e,f,g,h,i,j) \
62 #include "mono/cil/opcode.def"
67 #ifdef MONO_VERIFIER_DEBUG
68 #define VERIFIER_DEBUG(code) do { code } while (0)
70 #define VERIFIER_DEBUG(code)
73 //////////////////////////////////////////////////////////////////
74 #define IS_STRICT_MODE(ctx) (((ctx)->level & MONO_VERIFY_NON_STRICT) == 0)
75 #define IS_FAIL_FAST_MODE(ctx) (((ctx)->level & MONO_VERIFY_FAIL_FAST) == MONO_VERIFY_FAIL_FAST)
76 #define IS_SKIP_VISIBILITY(ctx) (((ctx)->level & MONO_VERIFY_SKIP_VISIBILITY) == MONO_VERIFY_SKIP_VISIBILITY)
77 #define IS_REPORT_ALL_ERRORS(ctx) (((ctx)->level & MONO_VERIFY_REPORT_ALL_ERRORS) == MONO_VERIFY_REPORT_ALL_ERRORS)
78 #define CLEAR_PREFIX(ctx, prefix) do { (ctx)->prefix_set &= ~(prefix); } while (0)
79 #define ADD_VERIFY_INFO(__ctx, __msg, __status, __exception) \
81 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
82 vinfo->info.status = __status; \
83 vinfo->info.message = ( __msg ); \
84 vinfo->exception_type = (__exception); \
85 (__ctx)->list = g_slist_prepend ((__ctx)->list, vinfo); \
88 //TODO support MONO_VERIFY_REPORT_ALL_ERRORS
89 #define ADD_VERIFY_ERROR(__ctx, __msg) \
91 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_ERROR, MONO_EXCEPTION_INVALID_PROGRAM); \
95 #define CODE_NOT_VERIFIABLE(__ctx, __msg) \
97 if ((__ctx)->verifiable || IS_REPORT_ALL_ERRORS (__ctx)) { \
98 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_NOT_VERIFIABLE, MONO_EXCEPTION_UNVERIFIABLE_IL); \
99 (__ctx)->verifiable = 0; \
100 if (IS_FAIL_FAST_MODE (__ctx)) \
101 (__ctx)->valid = 0; \
105 #define ADD_VERIFY_ERROR2(__ctx, __msg, __exception) \
107 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_ERROR, __exception); \
108 (__ctx)->valid = 0; \
111 #define CODE_NOT_VERIFIABLE2(__ctx, __msg, __exception) \
113 if ((__ctx)->verifiable || IS_REPORT_ALL_ERRORS (__ctx)) { \
114 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_NOT_VERIFIABLE, __exception); \
115 (__ctx)->verifiable = 0; \
116 if (IS_FAIL_FAST_MODE (__ctx)) \
117 (__ctx)->valid = 0; \
121 #define CHECK_ADD4_OVERFLOW_UN(a, b) ((guint32)(0xFFFFFFFFU) - (guint32)(b) < (guint32)(a))
122 #define CHECK_ADD8_OVERFLOW_UN(a, b) ((guint64)(0xFFFFFFFFFFFFFFFFUL) - (guint64)(b) < (guint64)(a))
124 #if SIZEOF_VOID_P == 4
125 #define CHECK_ADDP_OVERFLOW_UN(a,b) CHECK_ADD4_OVERFLOW_UN(a, b)
127 #define CHECK_ADDP_OVERFLOW_UN(a,b) CHECK_ADD8_OVERFLOW_UN(a, b)
130 #define ADDP_IS_GREATER_OR_OVF(a, b, c) (((a) + (b) > (c)) || CHECK_ADDP_OVERFLOW_UN (a, b))
131 #define ADD_IS_GREATER_OR_OVF(a, b, c) (((a) + (b) > (c)) || CHECK_ADD4_OVERFLOW_UN (a, b))
133 /*Flags to be used with ILCodeDesc::flags */
135 /*Instruction has not been processed.*/
136 IL_CODE_FLAG_NOT_PROCESSED = 0,
137 /*Instruction was decoded by mono_method_verify loop.*/
138 IL_CODE_FLAG_SEEN = 1,
139 /*Instruction was target of a branch or is at a protected block boundary.*/
140 IL_CODE_FLAG_WAS_TARGET = 2,
141 /*Used by stack_init to avoid double initialize each entry.*/
142 IL_CODE_FLAG_STACK_INITED = 4,
143 /*Used by merge_stacks to decide if it should just copy the eval stack.*/
144 IL_CODE_STACK_MERGED = 8,
145 /*This instruction is part of the delegate construction sequence, it cannot be target of a branch.*/
146 IL_CODE_DELEGATE_SEQUENCE = 0x10,
147 /*This is a delegate created from a ldftn to a non final virtual method*/
148 IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL = 0x20,
149 /*This is a call to a non final virtual method*/
150 IL_CODE_CALL_NONFINAL_VIRTUAL = 0x40,
168 guint16 size, max_size;
185 /*Allocated fnptr MonoType that should be freed by us.*/
187 /*Type dup'ed exception types from catch blocks.*/
188 GSList *exception_types;
193 /*TODO get rid of target here, need_merge in mono_method_verify and hoist the merging code in the branching code*/
197 MonoMethodSignature *signature;
198 MonoMethodHeader *header;
200 MonoGenericContext *generic_context;
204 /*This flag helps solving a corner case of delegate verification in that you cannot have a "starg 0"
205 *on a method that creates a delegate for a non-final virtual method using ldftn*/
206 gboolean has_this_store;
208 /*This flag is used to control if the contructor of the parent class has been called.
209 *If the this pointer is pushed on the eval stack and it's a reference type constructor and
210 * super_ctor_called is false, the uninitialized flag is set on the pushed value.
212 * Poping an uninitialized this ptr from the eval stack is an unverifiable operation unless
213 * the safe variant is used. Only a few opcodes can use it : dup, pop, ldfld, stfld and call to a constructor.
215 gboolean super_ctor_called;
219 MonoType *constrained_type;
223 merge_stacks (VerifyContext *ctx, ILCodeDesc *from, ILCodeDesc *to, gboolean start, gboolean external);
226 get_stack_type (MonoType *type);
229 mono_delegate_signature_equal (MonoMethodSignature *delegate_sig, MonoMethodSignature *method_sig, gboolean is_static_ldftn);
232 mono_class_is_valid_generic_instantiation (VerifyContext *ctx, MonoClass *klass);
235 mono_method_is_valid_generic_instantiation (VerifyContext *ctx, MonoMethod *method);
237 static MonoGenericParam*
238 verifier_get_generic_param_from_type (VerifyContext *ctx, MonoType *type);
241 verifier_class_is_assignable_from (MonoClass *target, MonoClass *candidate);
242 //////////////////////////////////////////////////////////////////
247 TYPE_INV = 0, /* leave at 0. */
252 /* Used by operator tables to resolve pointer types (managed & unmanaged) and by unmanaged pointer types*/
254 /* value types and classes */
256 /* Number of types, used to define the size of the tables*/
259 /* Used by tables to signal that a result is not verifiable*/
260 NON_VERIFIABLE_RESULT = 0x80,
262 /*Mask used to extract just the type, excluding flags */
265 /* The stack type is a managed pointer, unmask the value to res */
266 POINTER_MASK = 0x100,
268 /*Stack type with the pointer mask*/
269 RAW_TYPE_MASK = 0x10F,
271 /* Controlled Mutability Manager Pointer */
274 /* The stack type is a null literal*/
275 NULL_LITERAL_MASK = 0x400,
277 /**Used by ldarg.0 and family to let delegate verification happens.*/
278 THIS_POINTER_MASK = 0x800,
280 /**Signals that this is a boxed value type*/
283 /*This is an unitialized this ref*/
284 UNINIT_THIS_MASK = 0x2000,
287 static const char* const
288 type_names [TYPE_MAX + 1] = {
299 PREFIX_UNALIGNED = 1,
302 PREFIX_CONSTRAINED = 8,
305 //////////////////////////////////////////////////////////////////
307 #ifdef ENABLE_VERIFIER_STATS
309 #define MEM_ALLOC(amt) do { allocated_memory += (amt); working_set += (amt); } while (0)
310 #define MEM_FREE(amt) do { working_set -= (amt); } while (0)
312 static int allocated_memory;
313 static int working_set;
314 static int max_allocated_memory;
315 static int max_working_set;
316 static int total_allocated_memory;
319 finish_collect_stats (void)
321 max_allocated_memory = MAX (max_allocated_memory, allocated_memory);
322 max_working_set = MAX (max_working_set, working_set);
323 total_allocated_memory += allocated_memory;
324 allocated_memory = working_set = 0;
328 init_verifier_stats (void)
330 static gboolean inited;
333 mono_counters_register ("Maximum memory allocated during verification", MONO_COUNTER_METADATA | MONO_COUNTER_INT, &max_allocated_memory);
334 mono_counters_register ("Maximum memory used during verification", MONO_COUNTER_METADATA | MONO_COUNTER_INT, &max_working_set);
335 mono_counters_register ("Total memory allocated for verification", MONO_COUNTER_METADATA | MONO_COUNTER_INT, &total_allocated_memory);
341 #define MEM_ALLOC(amt) do {} while (0)
342 #define MEM_FREE(amt) do { } while (0)
344 #define finish_collect_stats()
345 #define init_verifier_stats()
350 //////////////////////////////////////////////////////////////////
353 /*Token validation macros and functions */
354 #define IS_MEMBER_REF(token) (mono_metadata_token_table (token) == MONO_TABLE_MEMBERREF)
355 #define IS_METHOD_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
356 #define IS_METHOD_SPEC(token) (mono_metadata_token_table (token) == MONO_TABLE_METHODSPEC)
357 #define IS_FIELD_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_FIELD)
359 #define IS_TYPE_REF(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPEREF)
360 #define IS_TYPE_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPEDEF)
361 #define IS_TYPE_SPEC(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPESPEC)
362 #define IS_METHOD_DEF_OR_REF_OR_SPEC(token) (IS_METHOD_DEF (token) || IS_MEMBER_REF (token) || IS_METHOD_SPEC (token))
363 #define IS_TYPE_DEF_OR_REF_OR_SPEC(token) (IS_TYPE_DEF (token) || IS_TYPE_REF (token) || IS_TYPE_SPEC (token))
364 #define IS_FIELD_DEF_OR_REF(token) (IS_FIELD_DEF (token) || IS_MEMBER_REF (token))
367 * Verify if @token refers to a valid row on int's table.
370 token_bounds_check (MonoImage *image, guint32 token)
373 return mono_reflection_is_valid_dynamic_token ((MonoDynamicImage*)image, token);
374 return image->tables [mono_metadata_token_table (token)].rows >= mono_metadata_token_index (token) && mono_metadata_token_index (token) > 0;
378 mono_type_create_fnptr_from_mono_method (VerifyContext *ctx, MonoMethod *method)
380 MonoType *res = g_new0 (MonoType, 1);
381 MEM_ALLOC (sizeof (MonoType));
383 //FIXME use mono_method_get_signature_full
384 res->data.method = mono_method_signature (method);
385 res->type = MONO_TYPE_FNPTR;
386 ctx->funptrs = g_slist_prepend (ctx->funptrs, res);
391 * mono_type_is_enum_type:
393 * Returns TRUE if @type is an enum type.
396 mono_type_is_enum_type (MonoType *type)
398 if (type->type == MONO_TYPE_VALUETYPE && type->data.klass->enumtype)
400 if (type->type == MONO_TYPE_GENERICINST && type->data.generic_class->container_class->enumtype)
406 * mono_type_is_value_type:
408 * Returns TRUE if @type is named after @namespace.@name.
412 mono_type_is_value_type (MonoType *type, const char *namespace, const char *name)
414 return type->type == MONO_TYPE_VALUETYPE &&
415 !strcmp (namespace, type->data.klass->name_space) &&
416 !strcmp (name, type->data.klass->name);
420 * Returns TURE if @type is VAR or MVAR
423 mono_type_is_generic_argument (MonoType *type)
425 return type->type == MONO_TYPE_VAR || type->type == MONO_TYPE_MVAR;
429 * mono_type_get_underlying_type_any:
431 * This functions is just like mono_type_get_underlying_type but it doesn't care if the type is byref.
433 * Returns the underlying type of @type regardless if it is byref or not.
436 mono_type_get_underlying_type_any (MonoType *type)
438 if (type->type == MONO_TYPE_VALUETYPE && type->data.klass->enumtype)
439 return mono_class_enum_basetype (type->data.klass);
440 if (type->type == MONO_TYPE_GENERICINST && type->data.generic_class->container_class->enumtype)
441 return mono_class_enum_basetype (type->data.generic_class->container_class);
445 static G_GNUC_UNUSED const char*
446 mono_type_get_stack_name (MonoType *type)
448 return type_names [get_stack_type (type) & TYPE_MASK];
451 #define CTOR_REQUIRED_FLAGS (METHOD_ATTRIBUTE_SPECIAL_NAME | METHOD_ATTRIBUTE_RT_SPECIAL_NAME)
452 #define CTOR_INVALID_FLAGS (METHOD_ATTRIBUTE_STATIC)
455 mono_method_is_constructor (MonoMethod *method)
457 return ((method->flags & CTOR_REQUIRED_FLAGS) == CTOR_REQUIRED_FLAGS &&
458 !(method->flags & CTOR_INVALID_FLAGS) &&
459 !strcmp (".ctor", method->name));
463 mono_class_has_default_constructor (MonoClass *klass)
468 mono_class_setup_methods (klass);
469 if (klass->exception_type)
472 for (i = 0; i < klass->method.count; ++i) {
473 method = klass->methods [i];
474 if (mono_method_is_constructor (method) &&
475 mono_method_signature (method) &&
476 mono_method_signature (method)->param_count == 0 &&
477 (method->flags & METHOD_ATTRIBUTE_MEMBER_ACCESS_MASK) == METHOD_ATTRIBUTE_PUBLIC)
484 * Verify if @type is valid for the given @ctx verification context.
485 * this function checks for VAR and MVAR types that are invalid under the current verifier,
488 mono_type_is_valid_type_in_context_full (MonoType *type, MonoGenericContext *context, gboolean check_gtd)
491 MonoGenericInst *inst;
493 switch (type->type) {
498 inst = type->type == MONO_TYPE_VAR ? context->class_inst : context->method_inst;
499 if (!inst || mono_type_get_generic_param_num (type) >= inst->type_argc)
502 case MONO_TYPE_SZARRAY:
503 return mono_type_is_valid_type_in_context_full (&type->data.klass->byval_arg, context, check_gtd);
504 case MONO_TYPE_ARRAY:
505 return mono_type_is_valid_type_in_context_full (&type->data.array->eklass->byval_arg, context, check_gtd);
507 return mono_type_is_valid_type_in_context_full (type->data.type, context, check_gtd);
508 case MONO_TYPE_GENERICINST:
509 inst = type->data.generic_class->context.class_inst;
512 for (i = 0; i < inst->type_argc; ++i)
513 if (!mono_type_is_valid_type_in_context_full (inst->type_argv [i], context, check_gtd))
516 case MONO_TYPE_CLASS:
517 case MONO_TYPE_VALUETYPE: {
518 MonoClass *klass = type->data.klass;
520 * It's possible to encode generic'sh types in such a way that they disguise themselves as class or valuetype.
521 * Fixing the type decoding is really tricky since under some cases this behavior is needed, for example, to
522 * have a 'class' type pointing to a 'genericinst' class.
524 * For the runtime these non canonical (weird) encodings work fine, the worst they can cause is some
525 * reflection oddities which are harmless - to security at least.
527 if (klass->byval_arg.type != type->type)
528 return mono_type_is_valid_type_in_context_full (&klass->byval_arg, context, check_gtd);
530 if (check_gtd && klass->generic_container)
539 mono_type_is_valid_type_in_context (MonoType *type, MonoGenericContext *context)
541 return mono_type_is_valid_type_in_context_full (type, context, FALSE);
544 /*This function returns NULL if the type is not instantiatable*/
546 verifier_inflate_type (VerifyContext *ctx, MonoType *type, MonoGenericContext *context)
551 result = mono_class_inflate_generic_type_checked (type, context, &error);
552 if (!mono_error_ok (&error)) {
553 mono_error_cleanup (&error);
559 /*A side note here. We don't need to check if arguments are broken since this
560 is only need to be done by the runtime before realizing the type.
563 is_valid_generic_instantiation (MonoGenericContainer *gc, MonoGenericContext *context, MonoGenericInst *ginst)
568 if (ginst->type_argc != gc->type_argc)
571 for (i = 0; i < gc->type_argc; ++i) {
572 MonoGenericParamInfo *param_info = mono_generic_container_get_param_info (gc, i);
573 MonoClass *paramClass;
574 MonoClass **constraints;
575 MonoType *param_type = ginst->type_argv [i];
577 /*it's not our job to validate type variables*/
578 if (mono_type_is_generic_argument (param_type))
581 paramClass = mono_class_from_mono_type (param_type);
584 /* A GTD can't be a generic argument.
586 * Due to how types are encoded we must check for the case of a genericinst MonoType and GTD MonoClass.
587 * This happens in cases such as: class Foo<T> { void X() { new Bar<T> (); } }
589 * Open instantiations can have GTDs as this happens when one type is instantiated with others params
590 * and the former has an expansion into the later. For example:
592 * class A<T>: B<K> {}
593 * The type A <K> has a parent B<K>, that is inflated into the GTD B<>.
594 * Since A<K> is open, thus not instantiatable, this is valid.
596 if (paramClass->generic_container && param_type->type != MONO_TYPE_GENERICINST && !ginst->is_open)
599 /*it's not safe to call mono_class_init from here*/
600 if (paramClass->generic_class && !paramClass->inited) {
601 if (!mono_class_is_valid_generic_instantiation (NULL, paramClass))
605 if (!param_info->constraints && !(param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK))
608 if ((param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT) && (!paramClass->valuetype || mono_class_is_nullable (paramClass)))
611 if ((param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_REFERENCE_TYPE_CONSTRAINT) && paramClass->valuetype)
614 if ((param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_CONSTRUCTOR_CONSTRAINT) && !paramClass->valuetype && !mono_class_has_default_constructor (paramClass))
617 if (!param_info->constraints)
620 for (constraints = param_info->constraints; *constraints; ++constraints) {
621 MonoClass *ctr = *constraints;
624 inflated = mono_class_inflate_generic_type_checked (&ctr->byval_arg, context, &error);
625 if (!mono_error_ok (&error)) {
626 mono_error_cleanup (&error);
629 ctr = mono_class_from_mono_type (inflated);
630 mono_metadata_free_type (inflated);
632 /*FIXME maybe we need the same this as verifier_class_is_assignable_from*/
633 if (!mono_class_is_assignable_from_slow (ctr, paramClass))
641 * Return true if @candidate is constraint compatible with @target.
643 * This means that @candidate constraints are a super set of @target constaints
646 mono_generic_param_is_constraint_compatible (VerifyContext *ctx, MonoGenericParam *target, MonoGenericParam *candidate, MonoClass *candidate_param_class, MonoGenericContext *context)
648 MonoGenericParamInfo *tinfo = mono_generic_param_info (target);
649 MonoGenericParamInfo *cinfo = mono_generic_param_info (candidate);
650 MonoClass **candidate_class;
651 gboolean class_constraint_satisfied = FALSE;
652 gboolean valuetype_constraint_satisfied = FALSE;
654 int tmask = tinfo->flags & GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK;
655 int cmask = cinfo->flags & GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK;
657 if (cinfo->constraints) {
658 for (candidate_class = cinfo->constraints; *candidate_class; ++candidate_class) {
660 MonoType *inflated = verifier_inflate_type (ctx, &(*candidate_class)->byval_arg, ctx->generic_context);
663 cc = mono_class_from_mono_type (inflated);
664 mono_metadata_free_type (inflated);
666 if (mono_type_is_reference (&cc->byval_arg) && !MONO_CLASS_IS_INTERFACE (cc))
667 class_constraint_satisfied = TRUE;
668 else if (!mono_type_is_reference (&cc->byval_arg) && !MONO_CLASS_IS_INTERFACE (cc))
669 valuetype_constraint_satisfied = TRUE;
672 class_constraint_satisfied |= (cmask & GENERIC_PARAMETER_ATTRIBUTE_REFERENCE_TYPE_CONSTRAINT) != 0;
673 valuetype_constraint_satisfied |= (cmask & GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT) != 0;
675 if ((tmask & GENERIC_PARAMETER_ATTRIBUTE_REFERENCE_TYPE_CONSTRAINT) && !class_constraint_satisfied)
677 if ((tmask & GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT) && !valuetype_constraint_satisfied)
679 if ((tmask & GENERIC_PARAMETER_ATTRIBUTE_CONSTRUCTOR_CONSTRAINT) && !((cmask & GENERIC_PARAMETER_ATTRIBUTE_CONSTRUCTOR_CONSTRAINT) ||
680 valuetype_constraint_satisfied)) {
685 if (tinfo->constraints) {
686 MonoClass **target_class;
687 for (target_class = tinfo->constraints; *target_class; ++target_class) {
689 MonoType *inflated = verifier_inflate_type (ctx, &(*target_class)->byval_arg, context);
692 tc = mono_class_from_mono_type (inflated);
693 mono_metadata_free_type (inflated);
696 * A constraint from @target might inflate into @candidate itself and in that case we don't need
697 * check it's constraints since it satisfy the constraint by itself.
699 if (mono_metadata_type_equal (&tc->byval_arg, &candidate_param_class->byval_arg))
702 if (!cinfo->constraints)
705 for (candidate_class = cinfo->constraints; *candidate_class; ++candidate_class) {
707 inflated = verifier_inflate_type (ctx, &(*candidate_class)->byval_arg, ctx->generic_context);
710 cc = mono_class_from_mono_type (inflated);
711 mono_metadata_free_type (inflated);
713 if (verifier_class_is_assignable_from (tc, cc))
717 * This happens when we have the following:
719 * Bar<K> where K : IFace
720 * Foo<T, U> where T : U where U : IFace
722 * Bar<T> <- T here satisfy K constraint transitively through to U's constraint
725 if (mono_type_is_generic_argument (&cc->byval_arg)) {
726 MonoGenericParam *other_candidate = verifier_get_generic_param_from_type (ctx, &cc->byval_arg);
728 if (mono_generic_param_is_constraint_compatible (ctx, target, other_candidate, cc, context)) {
733 if (!*candidate_class)
740 static MonoGenericParam*
741 verifier_get_generic_param_from_type (VerifyContext *ctx, MonoType *type)
743 MonoGenericContainer *gc;
744 MonoMethod *method = ctx->method;
747 num = mono_type_get_generic_param_num (type);
749 if (type->type == MONO_TYPE_VAR) {
750 MonoClass *gtd = method->klass;
751 if (gtd->generic_class)
752 gtd = gtd->generic_class->container_class;
753 gc = gtd->generic_container;
755 MonoMethod *gmd = method;
756 if (method->is_inflated)
757 gmd = ((MonoMethodInflated*)method)->declaring;
758 gc = mono_method_get_generic_container (gmd);
762 return mono_generic_container_get_param (gc, num);
768 * Verify if @type is valid for the given @ctx verification context.
769 * this function checks for VAR and MVAR types that are invalid under the current verifier,
770 * This means that it either
773 is_valid_type_in_context (VerifyContext *ctx, MonoType *type)
775 return mono_type_is_valid_type_in_context (type, ctx->generic_context);
779 is_valid_generic_instantiation_in_context (VerifyContext *ctx, MonoGenericInst *ginst, gboolean check_gtd)
782 for (i = 0; i < ginst->type_argc; ++i) {
783 MonoType *type = ginst->type_argv [i];
785 if (!mono_type_is_valid_type_in_context_full (type, ctx->generic_context, TRUE))
792 generic_arguments_respect_constraints (VerifyContext *ctx, MonoGenericContainer *gc, MonoGenericContext *context, MonoGenericInst *ginst)
795 for (i = 0; i < ginst->type_argc; ++i) {
796 MonoType *type = ginst->type_argv [i];
797 MonoGenericParam *target = mono_generic_container_get_param (gc, i);
798 MonoGenericParam *candidate;
799 MonoClass *candidate_class;
801 if (!mono_type_is_generic_argument (type))
804 if (!is_valid_type_in_context (ctx, type))
807 candidate = verifier_get_generic_param_from_type (ctx, type);
808 candidate_class = mono_class_from_mono_type (type);
810 if (!mono_generic_param_is_constraint_compatible (ctx, target, candidate, candidate_class, context))
817 mono_method_repect_method_constraints (VerifyContext *ctx, MonoMethod *method)
819 MonoMethodInflated *gmethod = (MonoMethodInflated *)method;
820 MonoGenericInst *ginst = gmethod->context.method_inst;
821 MonoGenericContainer *gc = mono_method_get_generic_container (gmethod->declaring);
822 return !gc || generic_arguments_respect_constraints (ctx, gc, &gmethod->context, ginst);
826 mono_class_repect_method_constraints (VerifyContext *ctx, MonoClass *klass)
828 MonoGenericClass *gklass = klass->generic_class;
829 MonoGenericInst *ginst = gklass->context.class_inst;
830 MonoGenericContainer *gc = gklass->container_class->generic_container;
831 return !gc || generic_arguments_respect_constraints (ctx, gc, &gklass->context, ginst);
835 mono_method_is_valid_generic_instantiation (VerifyContext *ctx, MonoMethod *method)
837 MonoMethodInflated *gmethod = (MonoMethodInflated *)method;
838 MonoGenericInst *ginst = gmethod->context.method_inst;
839 MonoGenericContainer *gc = mono_method_get_generic_container (gmethod->declaring);
840 if (!gc) /*non-generic inflated method - it's part of a generic type */
842 if (ctx && !is_valid_generic_instantiation_in_context (ctx, ginst, TRUE))
844 return is_valid_generic_instantiation (gc, &gmethod->context, ginst);
849 mono_class_is_valid_generic_instantiation (VerifyContext *ctx, MonoClass *klass)
851 MonoGenericClass *gklass = klass->generic_class;
852 MonoGenericInst *ginst = gklass->context.class_inst;
853 MonoGenericContainer *gc = gklass->container_class->generic_container;
854 if (ctx && !is_valid_generic_instantiation_in_context (ctx, ginst, TRUE))
856 return is_valid_generic_instantiation (gc, &gklass->context, ginst);
860 mono_type_is_valid_in_context (VerifyContext *ctx, MonoType *type)
865 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid null type at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
869 if (!is_valid_type_in_context (ctx, type)) {
870 char *str = mono_type_full_name (type);
871 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid generic type (%s%s) (argument out of range or %s is not generic) at 0x%04x",
872 str [0] == '!' ? "" : type->type == MONO_TYPE_VAR ? "!" : "!!",
874 type->type == MONO_TYPE_VAR ? "class" : "method",
876 MONO_EXCEPTION_BAD_IMAGE);
881 klass = mono_class_from_mono_type (type);
882 mono_class_init (klass);
883 if (mono_loader_get_last_error () || klass->exception_type != MONO_EXCEPTION_NONE) {
884 if (klass->generic_class && !mono_class_is_valid_generic_instantiation (NULL, klass))
885 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid generic instantiation of type %s.%s at 0x%04x", klass->name_space, klass->name, ctx->ip_offset), MONO_EXCEPTION_TYPE_LOAD);
887 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Could not load type %s.%s at 0x%04x", klass->name_space, klass->name, ctx->ip_offset), MONO_EXCEPTION_TYPE_LOAD);
888 mono_loader_clear_error ();
892 if (klass->generic_class && klass->generic_class->container_class->exception_type != MONO_EXCEPTION_NONE) {
893 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Could not load type %s.%s at 0x%04x", klass->name_space, klass->name, ctx->ip_offset), MONO_EXCEPTION_TYPE_LOAD);
897 if (!klass->generic_class)
900 if (!mono_class_is_valid_generic_instantiation (ctx, klass)) {
901 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid generic type instantiation of type %s.%s at 0x%04x", klass->name_space, klass->name, ctx->ip_offset), MONO_EXCEPTION_TYPE_LOAD);
905 if (!mono_class_repect_method_constraints (ctx, klass)) {
906 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid generic type instantiation of type %s.%s (generic args don't respect target's constraints) at 0x%04x", klass->name_space, klass->name, ctx->ip_offset), MONO_EXCEPTION_TYPE_LOAD);
913 static verify_result_t
914 mono_method_is_valid_in_context (VerifyContext *ctx, MonoMethod *method)
916 if (!mono_type_is_valid_in_context (ctx, &method->klass->byval_arg))
917 return RESULT_INVALID;
919 if (!method->is_inflated)
922 if (!mono_method_is_valid_generic_instantiation (ctx, method)) {
923 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid generic method instantiation of method %s.%s::%s at 0x%04x", method->klass->name_space, method->klass->name, method->name, ctx->ip_offset), MONO_EXCEPTION_UNVERIFIABLE_IL);
924 return RESULT_INVALID;
927 if (!mono_method_repect_method_constraints (ctx, method)) {
928 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid generic method instantiation of method %s.%s::%s (generic args don't respect target's constraints) at 0x%04x", method->klass->name_space, method->klass->name, method->name, ctx->ip_offset));
929 return RESULT_UNVERIFIABLE;
935 static MonoClassField*
936 verifier_load_field (VerifyContext *ctx, int token, MonoClass **out_klass, const char *opcode) {
937 MonoClassField *field;
938 MonoClass *klass = NULL;
940 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
941 field = mono_method_get_wrapper_data (ctx->method, (guint32)token);
942 klass = field ? field->parent : NULL;
944 if (!IS_FIELD_DEF_OR_REF (token) || !token_bounds_check (ctx->image, token)) {
945 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid field token 0x%08x for %s at 0x%04x", token, opcode, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
949 field = mono_field_from_token (ctx->image, token, &klass, ctx->generic_context);
952 if (!field || !field->parent || !klass || mono_loader_get_last_error ()) {
953 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Cannot load field from token 0x%08x for %s at 0x%04x", token, opcode, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
954 mono_loader_clear_error ();
958 if (!mono_type_is_valid_in_context (ctx, &klass->byval_arg))
961 if (mono_field_get_flags (field) & FIELD_ATTRIBUTE_LITERAL) {
962 char *type_name = mono_type_get_full_name (field->parent);
963 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot reference literal field %s::%s at 0x%04x", type_name, field->name, ctx->ip_offset));
973 verifier_load_method (VerifyContext *ctx, int token, const char *opcode) {
976 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
977 method = mono_method_get_wrapper_data (ctx->method, (guint32)token);
979 if (!IS_METHOD_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
980 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid method token 0x%08x for %s at 0x%04x", token, opcode, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
984 method = mono_get_method_full (ctx->image, token, NULL, ctx->generic_context);
987 if (!method || mono_loader_get_last_error ()) {
988 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Cannot load method from token 0x%08x for %s at 0x%04x", token, opcode, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
989 mono_loader_clear_error ();
993 if (mono_method_is_valid_in_context (ctx, method) == RESULT_INVALID)
1000 verifier_load_type (VerifyContext *ctx, int token, const char *opcode) {
1003 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
1004 MonoClass *class = mono_method_get_wrapper_data (ctx->method, (guint32)token);
1005 type = class ? &class->byval_arg : NULL;
1007 if (!IS_TYPE_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
1008 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid type token 0x%08x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
1011 type = mono_type_get_full (ctx->image, token, ctx->generic_context);
1014 if (!type || mono_loader_get_last_error ()) {
1015 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Cannot load type from token 0x%08x for %s at 0x%04x", token, opcode, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
1016 mono_loader_clear_error ();
1020 if (!mono_type_is_valid_in_context (ctx, type))
1027 /* stack_slot_get_type:
1029 * Returns the stack type of @value. This value includes POINTER_MASK.
1031 * Use this function to checks that account for a managed pointer.
1034 stack_slot_get_type (ILStackDesc *value)
1036 return value->stype & RAW_TYPE_MASK;
1039 /* stack_slot_get_underlying_type:
1041 * Returns the stack type of @value. This value does not include POINTER_MASK.
1043 * Use this function is cases where the fact that the value could be a managed pointer is
1044 * irrelevant. For example, field load doesn't care about this fact of type on stack.
1047 stack_slot_get_underlying_type (ILStackDesc *value)
1049 return value->stype & TYPE_MASK;
1052 /* stack_slot_is_managed_pointer:
1054 * Returns TRUE is @value is a managed pointer.
1057 stack_slot_is_managed_pointer (ILStackDesc *value)
1059 return (value->stype & POINTER_MASK) == POINTER_MASK;
1062 /* stack_slot_is_managed_mutability_pointer:
1064 * Returns TRUE is @value is a managed mutability pointer.
1066 static G_GNUC_UNUSED gboolean
1067 stack_slot_is_managed_mutability_pointer (ILStackDesc *value)
1069 return (value->stype & CMMP_MASK) == CMMP_MASK;
1072 /* stack_slot_is_null_literal:
1074 * Returns TRUE is @value is the null literal.
1077 stack_slot_is_null_literal (ILStackDesc *value)
1079 return (value->stype & NULL_LITERAL_MASK) == NULL_LITERAL_MASK;
1083 /* stack_slot_is_this_pointer:
1085 * Returns TRUE is @value is the this literal
1088 stack_slot_is_this_pointer (ILStackDesc *value)
1090 return (value->stype & THIS_POINTER_MASK) == THIS_POINTER_MASK;
1093 /* stack_slot_is_boxed_value:
1095 * Returns TRUE is @value is a boxed value
1098 stack_slot_is_boxed_value (ILStackDesc *value)
1100 return (value->stype & BOXED_MASK) == BOXED_MASK;
1104 stack_slot_get_name (ILStackDesc *value)
1106 return type_names [value->stype & TYPE_MASK];
1109 #define APPEND_WITH_PREDICATE(PRED,NAME) do {\
1110 if (PRED (value)) { \
1112 g_string_append (str, ", "); \
1113 g_string_append (str, NAME); \
1118 stack_slot_stack_type_full_name (ILStackDesc *value)
1120 GString *str = g_string_new ("");
1122 gboolean has_pred = FALSE, first = TRUE;
1124 if ((value->stype & TYPE_MASK) != value->stype) {
1125 g_string_append(str, "[");
1126 APPEND_WITH_PREDICATE (stack_slot_is_this_pointer, "this");
1127 APPEND_WITH_PREDICATE (stack_slot_is_boxed_value, "boxed");
1128 APPEND_WITH_PREDICATE (stack_slot_is_null_literal, "null");
1129 APPEND_WITH_PREDICATE (stack_slot_is_managed_mutability_pointer, "cmmp");
1130 APPEND_WITH_PREDICATE (stack_slot_is_managed_pointer, "mp");
1134 if (mono_type_is_generic_argument (value->type) && !stack_slot_is_boxed_value (value)) {
1136 g_string_append(str, "[");
1138 g_string_append (str, ", ");
1139 g_string_append (str, "unboxed");
1144 g_string_append(str, "] ");
1146 g_string_append (str, stack_slot_get_name (value));
1148 g_string_free (str, FALSE);
1153 stack_slot_full_name (ILStackDesc *value)
1155 char *type_name = mono_type_full_name (value->type);
1156 char *stack_name = stack_slot_stack_type_full_name (value);
1157 char *res = g_strdup_printf ("%s (%s)", type_name, stack_name);
1159 g_free (stack_name);
1163 //////////////////////////////////////////////////////////////////
1165 mono_free_verify_list (GSList *list)
1167 MonoVerifyInfoExtended *info;
1170 for (tmp = list; tmp; tmp = tmp->next) {
1172 g_free (info->info.message);
1175 g_slist_free (list);
1178 #define ADD_ERROR(list,msg) \
1180 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1181 vinfo->info.status = MONO_VERIFY_ERROR; \
1182 vinfo->info.message = (msg); \
1183 (list) = g_slist_prepend ((list), vinfo); \
1186 #define ADD_WARN(list,code,msg) \
1188 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1189 vinfo->info.status = (code); \
1190 vinfo->info.message = (msg); \
1191 (list) = g_slist_prepend ((list), vinfo); \
1194 #define ADD_INVALID(list,msg) \
1196 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1197 vinfo->status = MONO_VERIFY_ERROR; \
1198 vinfo->message = (msg); \
1199 (list) = g_slist_prepend ((list), vinfo); \
1200 /*G_BREAKPOINT ();*/ \
1204 #define CHECK_STACK_UNDERFLOW(num) \
1206 if (cur_stack < (num)) \
1207 ADD_INVALID (list, g_strdup_printf ("Stack underflow at 0x%04x (%d items instead of %d)", ip_offset, cur_stack, (num))); \
1210 #define CHECK_STACK_OVERFLOW() \
1212 if (cur_stack >= max_stack) \
1213 ADD_INVALID (list, g_strdup_printf ("Maxstack exceeded at 0x%04x", ip_offset)); \
1218 in_any_block (MonoMethodHeader *header, guint offset)
1221 MonoExceptionClause *clause;
1223 for (i = 0; i < header->num_clauses; ++i) {
1224 clause = &header->clauses [i];
1225 if (MONO_OFFSET_IN_CLAUSE (clause, offset))
1227 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1229 if (MONO_OFFSET_IN_FILTER (clause, offset))
1236 * in_any_exception_block:
1238 * Returns TRUE is @offset is part of any exception clause (filter, handler, catch, finally or fault).
1241 in_any_exception_block (MonoMethodHeader *header, guint offset)
1244 MonoExceptionClause *clause;
1246 for (i = 0; i < header->num_clauses; ++i) {
1247 clause = &header->clauses [i];
1248 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1250 if (MONO_OFFSET_IN_FILTER (clause, offset))
1257 * is_valid_branch_instruction:
1259 * Verify if it's valid to perform a branch from @offset to @target.
1260 * This should be used with br and brtrue/false.
1261 * It returns 0 if valid, 1 for unverifiable and 2 for invalid.
1262 * The major difference from other similiar functions is that branching into a
1263 * finally/fault block is invalid instead of just unverifiable.
1266 is_valid_branch_instruction (MonoMethodHeader *header, guint offset, guint target)
1269 MonoExceptionClause *clause;
1271 for (i = 0; i < header->num_clauses; ++i) {
1272 clause = &header->clauses [i];
1273 /*branching into a finally block is invalid*/
1274 if ((clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY || clause->flags == MONO_EXCEPTION_CLAUSE_FAULT) &&
1275 !MONO_OFFSET_IN_HANDLER (clause, offset) &&
1276 MONO_OFFSET_IN_HANDLER (clause, target))
1279 if (clause->try_offset != target && (MONO_OFFSET_IN_CLAUSE (clause, offset) ^ MONO_OFFSET_IN_CLAUSE (clause, target)))
1281 if (MONO_OFFSET_IN_HANDLER (clause, offset) ^ MONO_OFFSET_IN_HANDLER (clause, target))
1283 if (MONO_OFFSET_IN_FILTER (clause, offset) ^ MONO_OFFSET_IN_FILTER (clause, target))
1290 * is_valid_cmp_branch_instruction:
1292 * Verify if it's valid to perform a branch from @offset to @target.
1293 * This should be used with binary comparison branching instruction, like beq, bge and similars.
1294 * It returns 0 if valid, 1 for unverifiable and 2 for invalid.
1296 * The major differences from other similar functions are that most errors lead to invalid
1297 * code and only branching out of finally, filter or fault clauses is unverifiable.
1300 is_valid_cmp_branch_instruction (MonoMethodHeader *header, guint offset, guint target)
1303 MonoExceptionClause *clause;
1305 for (i = 0; i < header->num_clauses; ++i) {
1306 clause = &header->clauses [i];
1307 /*branching out of a handler or finally*/
1308 if (clause->flags != MONO_EXCEPTION_CLAUSE_NONE &&
1309 MONO_OFFSET_IN_HANDLER (clause, offset) &&
1310 !MONO_OFFSET_IN_HANDLER (clause, target))
1313 if (clause->try_offset != target && (MONO_OFFSET_IN_CLAUSE (clause, offset) ^ MONO_OFFSET_IN_CLAUSE (clause, target)))
1315 if (MONO_OFFSET_IN_HANDLER (clause, offset) ^ MONO_OFFSET_IN_HANDLER (clause, target))
1317 if (MONO_OFFSET_IN_FILTER (clause, offset) ^ MONO_OFFSET_IN_FILTER (clause, target))
1324 * A leave can't escape a finally block
1327 is_correct_leave (MonoMethodHeader *header, guint offset, guint target)
1330 MonoExceptionClause *clause;
1332 for (i = 0; i < header->num_clauses; ++i) {
1333 clause = &header->clauses [i];
1334 if (clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY && MONO_OFFSET_IN_HANDLER (clause, offset) && !MONO_OFFSET_IN_HANDLER (clause, target))
1336 if (MONO_OFFSET_IN_FILTER (clause, offset))
1343 * A rethrow can't happen outside of a catch handler.
1346 is_correct_rethrow (MonoMethodHeader *header, guint offset)
1349 MonoExceptionClause *clause;
1351 for (i = 0; i < header->num_clauses; ++i) {
1352 clause = &header->clauses [i];
1353 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1355 if (MONO_OFFSET_IN_FILTER (clause, offset))
1362 * An endfinally can't happen outside of a finally/fault handler.
1365 is_correct_endfinally (MonoMethodHeader *header, guint offset)
1368 MonoExceptionClause *clause;
1370 for (i = 0; i < header->num_clauses; ++i) {
1371 clause = &header->clauses [i];
1372 if (MONO_OFFSET_IN_HANDLER (clause, offset) && (clause->flags == MONO_EXCEPTION_CLAUSE_FAULT || clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY))
1380 * An endfilter can only happens inside a filter clause.
1381 * In non-strict mode filter is allowed inside the handler clause too
1383 static MonoExceptionClause *
1384 is_correct_endfilter (VerifyContext *ctx, guint offset)
1387 MonoExceptionClause *clause;
1389 for (i = 0; i < ctx->header->num_clauses; ++i) {
1390 clause = &ctx->header->clauses [i];
1391 if (clause->flags != MONO_EXCEPTION_CLAUSE_FILTER)
1393 if (MONO_OFFSET_IN_FILTER (clause, offset))
1395 if (!IS_STRICT_MODE (ctx) && MONO_OFFSET_IN_HANDLER (clause, offset))
1403 * Non-strict endfilter can happens inside a try block or any handler block
1406 is_unverifiable_endfilter (VerifyContext *ctx, guint offset)
1409 MonoExceptionClause *clause;
1411 for (i = 0; i < ctx->header->num_clauses; ++i) {
1412 clause = &ctx->header->clauses [i];
1413 if (MONO_OFFSET_IN_CLAUSE (clause, offset))
1420 is_valid_bool_arg (ILStackDesc *arg)
1422 if (stack_slot_is_managed_pointer (arg) || stack_slot_is_boxed_value (arg) || stack_slot_is_null_literal (arg))
1426 switch (stack_slot_get_underlying_type (arg)) {
1429 case TYPE_NATIVE_INT:
1433 g_assert (arg->type);
1434 switch (arg->type->type) {
1435 case MONO_TYPE_CLASS:
1436 case MONO_TYPE_STRING:
1437 case MONO_TYPE_OBJECT:
1438 case MONO_TYPE_SZARRAY:
1439 case MONO_TYPE_ARRAY:
1440 case MONO_TYPE_FNPTR:
1443 case MONO_TYPE_GENERICINST:
1444 /*We need to check if the container class
1445 * of the generic type is a valuetype, iow:
1446 * is it a "class Foo<T>" or a "struct Foo<T>"?
1448 return !arg->type->data.generic_class->container_class->valuetype;
1456 /*Type manipulation helper*/
1458 /*Returns the byref version of the supplied MonoType*/
1460 mono_type_get_type_byref (MonoType *type)
1464 return &mono_class_from_mono_type (type)->this_arg;
1468 /*Returns the byval version of the supplied MonoType*/
1470 mono_type_get_type_byval (MonoType *type)
1474 return &mono_class_from_mono_type (type)->byval_arg;
1478 mono_type_from_stack_slot (ILStackDesc *slot)
1480 if (stack_slot_is_managed_pointer (slot))
1481 return mono_type_get_type_byref (slot->type);
1485 /*Stack manipulation code*/
1488 ensure_stack_size (ILCodeDesc *stack, int required)
1493 if (required < stack->max_size)
1496 /* We don't have to worry about the exponential growth since stack_copy prune unused space */
1497 new_size = MAX (8, MAX (required, stack->max_size * 2));
1499 g_assert (new_size >= stack->size);
1500 g_assert (new_size >= required);
1502 tmp = g_new0 (ILStackDesc, new_size);
1503 MEM_ALLOC (sizeof (ILStackDesc) * new_size);
1507 memcpy (tmp, stack->stack, stack->size * sizeof (ILStackDesc));
1508 g_free (stack->stack);
1509 MEM_FREE (sizeof (ILStackDesc) * stack->max_size);
1513 stack->max_size = new_size;
1517 stack_init (VerifyContext *ctx, ILCodeDesc *state)
1519 if (state->flags & IL_CODE_FLAG_STACK_INITED)
1521 state->size = state->max_size = 0;
1522 state->flags |= IL_CODE_FLAG_STACK_INITED;
1526 stack_copy (ILCodeDesc *to, ILCodeDesc *from)
1528 ensure_stack_size (to, from->size);
1529 to->size = from->size;
1531 /*stack copy happens at merge points, which have small stacks*/
1533 memcpy (to->stack, from->stack, sizeof (ILStackDesc) * from->size);
1537 copy_stack_value (ILStackDesc *to, ILStackDesc *from)
1539 to->stype = from->stype;
1540 to->type = from->type;
1541 to->method = from->method;
1545 check_underflow (VerifyContext *ctx, int size)
1547 if (ctx->eval.size < size) {
1548 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack underflow, required %d, but have %d at 0x%04x", size, ctx->eval.size, ctx->ip_offset));
1555 check_overflow (VerifyContext *ctx)
1557 if (ctx->eval.size >= ctx->max_stack) {
1558 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have stack-depth %d at 0x%04x", ctx->eval.size + 1, ctx->ip_offset));
1564 /*This reject out PTR, FNPTR and TYPEDBYREF*/
1566 check_unmanaged_pointer (VerifyContext *ctx, ILStackDesc *value)
1568 if (stack_slot_get_type (value) == TYPE_PTR) {
1569 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unmanaged pointer is not a verifiable type at 0x%04x", ctx->ip_offset));
1575 /*TODO verify if MONO_TYPE_TYPEDBYREF is not allowed here as well.*/
1577 check_unverifiable_type (VerifyContext *ctx, MonoType *type)
1579 if (type->type == MONO_TYPE_PTR || type->type == MONO_TYPE_FNPTR) {
1580 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unmanaged pointer is not a verifiable type at 0x%04x", ctx->ip_offset));
1586 static ILStackDesc *
1587 stack_push (VerifyContext *ctx)
1589 g_assert (ctx->eval.size < ctx->max_stack);
1590 g_assert (ctx->eval.size <= ctx->eval.max_size);
1592 ensure_stack_size (&ctx->eval, ctx->eval.size + 1);
1594 return & ctx->eval.stack [ctx->eval.size++];
1597 static ILStackDesc *
1598 stack_push_val (VerifyContext *ctx, int stype, MonoType *type)
1600 ILStackDesc *top = stack_push (ctx);
1606 static ILStackDesc *
1607 stack_pop (VerifyContext *ctx)
1610 g_assert (ctx->eval.size > 0);
1611 ret = ctx->eval.stack + --ctx->eval.size;
1612 if ((ret->stype & UNINIT_THIS_MASK) == UNINIT_THIS_MASK)
1613 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Found use of uninitialized 'this ptr' ref at 0x%04x", ctx->ip_offset));
1617 /* This function allows to safely pop an unititialized this ptr from
1618 * the eval stack without marking the method as unverifiable.
1620 static ILStackDesc *
1621 stack_pop_safe (VerifyContext *ctx)
1623 g_assert (ctx->eval.size > 0);
1624 return ctx->eval.stack + --ctx->eval.size;
1627 /*Positive number distance from stack top. [0] is stack top, [1] is the one below*/
1629 stack_peek (VerifyContext *ctx, int distance)
1631 g_assert (ctx->eval.size - distance > 0);
1632 return ctx->eval.stack + (ctx->eval.size - 1 - distance);
1635 static ILStackDesc *
1636 stack_push_stack_val (VerifyContext *ctx, ILStackDesc *value)
1638 ILStackDesc *top = stack_push (ctx);
1639 copy_stack_value (top, value);
1643 /* Returns the MonoType associated with the token, or NULL if it is invalid.
1645 * A boxable type can be either a reference or value type, but cannot be a byref type or an unmanaged pointer
1648 get_boxable_mono_type (VerifyContext* ctx, int token, const char *opcode)
1653 if (!(type = verifier_load_type (ctx, token, opcode)))
1656 if (type->byref && type->type != MONO_TYPE_TYPEDBYREF) {
1657 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of byref type for %s at 0x%04x", opcode, ctx->ip_offset));
1661 if (type->type == MONO_TYPE_VOID) {
1662 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of void type for %s at 0x%04x", opcode, ctx->ip_offset));
1666 if (type->type == MONO_TYPE_TYPEDBYREF)
1667 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid use of typedbyref for %s at 0x%04x", opcode, ctx->ip_offset));
1669 if (!(class = mono_class_from_mono_type (type)))
1670 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Could not retrieve type token for %s at 0x%04x", opcode, ctx->ip_offset));
1672 if (class->generic_container && type->type != MONO_TYPE_GENERICINST)
1673 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));
1675 check_unverifiable_type (ctx, type);
1680 /*operation result tables */
1682 static const unsigned char bin_op_table [TYPE_MAX][TYPE_MAX] = {
1683 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1684 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1685 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1686 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
1687 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1688 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1691 static const unsigned char add_table [TYPE_MAX][TYPE_MAX] = {
1692 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1693 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1694 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1695 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
1696 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_INV, TYPE_INV},
1697 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1700 static const unsigned char sub_table [TYPE_MAX][TYPE_MAX] = {
1701 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1702 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1703 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1704 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
1705 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_NATIVE_INT | NON_VERIFIABLE_RESULT, TYPE_INV},
1706 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1709 static const unsigned char int_bin_op_table [TYPE_MAX][TYPE_MAX] = {
1710 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1711 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1712 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1713 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1714 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1715 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1718 static const unsigned char shift_op_table [TYPE_MAX][TYPE_MAX] = {
1719 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1720 {TYPE_I8, TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV},
1721 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1722 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1723 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1724 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1727 static const unsigned char cmp_br_op [TYPE_MAX][TYPE_MAX] = {
1728 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1729 {TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1730 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1731 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV},
1732 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV},
1733 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1736 static const unsigned char cmp_br_eq_op [TYPE_MAX][TYPE_MAX] = {
1737 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1738 {TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1739 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_I4 | NON_VERIFIABLE_RESULT, TYPE_INV},
1740 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV},
1741 {TYPE_INV, TYPE_INV, TYPE_I4 | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_I4, TYPE_INV},
1742 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4},
1745 static const unsigned char add_ovf_un_table [TYPE_MAX][TYPE_MAX] = {
1746 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1747 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1748 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1749 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1750 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_INV, TYPE_INV},
1751 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1754 static const unsigned char sub_ovf_un_table [TYPE_MAX][TYPE_MAX] = {
1755 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1756 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1757 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1758 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1759 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_NATIVE_INT | NON_VERIFIABLE_RESULT, TYPE_INV},
1760 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1763 static const unsigned char bin_ovf_table [TYPE_MAX][TYPE_MAX] = {
1764 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1765 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1766 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1767 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1768 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1769 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1772 #ifdef MONO_VERIFIER_DEBUG
1776 dump_stack_value (ILStackDesc *value)
1778 printf ("[(%x)(%x)", value->type->type, value->stype);
1780 if (stack_slot_is_this_pointer (value))
1783 if (stack_slot_is_boxed_value (value))
1784 printf ("[boxed] ");
1786 if (stack_slot_is_null_literal (value))
1789 if (stack_slot_is_managed_mutability_pointer (value))
1790 printf ("Controled Mutability MP: ");
1792 if (stack_slot_is_managed_pointer (value))
1793 printf ("Managed Pointer to: ");
1795 switch (stack_slot_get_underlying_type (value)) {
1797 printf ("invalid type]");
1805 case TYPE_NATIVE_INT:
1806 printf ("native int]");
1809 printf ("float64]");
1812 printf ("unmanaged pointer]");
1815 switch (value->type->type) {
1816 case MONO_TYPE_CLASS:
1817 case MONO_TYPE_VALUETYPE:
1818 printf ("complex] (%s)", value->type->data.klass->name);
1820 case MONO_TYPE_STRING:
1821 printf ("complex] (string)");
1823 case MONO_TYPE_OBJECT:
1824 printf ("complex] (object)");
1826 case MONO_TYPE_SZARRAY:
1827 printf ("complex] (%s [])", value->type->data.klass->name);
1829 case MONO_TYPE_ARRAY:
1830 printf ("complex] (%s [%d %d %d])",
1831 value->type->data.array->eklass->name,
1832 value->type->data.array->rank,
1833 value->type->data.array->numsizes,
1834 value->type->data.array->numlobounds);
1836 case MONO_TYPE_GENERICINST:
1837 printf ("complex] (inst of %s )", value->type->data.generic_class->container_class->name);
1840 printf ("complex] (type generic param !%d - %s) ", value->type->data.generic_param->num, mono_generic_param_info (value->type->data.generic_param)->name);
1842 case MONO_TYPE_MVAR:
1843 printf ("complex] (method generic param !!%d - %s) ", value->type->data.generic_param->num, mono_generic_param_info (value->type->data.generic_param)->name);
1846 //should be a boxed value
1847 char * name = mono_type_full_name (value->type);
1848 printf ("complex] %s", name);
1854 printf ("unknown stack %x type]\n", value->stype);
1855 g_assert_not_reached ();
1860 dump_stack_state (ILCodeDesc *state)
1864 printf ("(%d) ", state->size);
1865 for (i = 0; i < state->size; ++i)
1866 dump_stack_value (state->stack + i);
1871 /*Returns TRUE if candidate array type can be assigned to target.
1872 *Both parameters MUST be of type MONO_TYPE_ARRAY (target->type == MONO_TYPE_ARRAY)
1875 is_array_type_compatible (MonoType *target, MonoType *candidate)
1877 MonoArrayType *left = target->data.array;
1878 MonoArrayType *right = candidate->data.array;
1880 g_assert (target->type == MONO_TYPE_ARRAY);
1881 g_assert (candidate->type == MONO_TYPE_ARRAY);
1883 if (left->rank != right->rank)
1886 return verifier_class_is_assignable_from (left->eklass, right->eklass);
1890 get_stack_type (MonoType *type)
1893 int type_kind = type->type;
1895 mask = POINTER_MASK;
1896 /*TODO handle CMMP_MASK */
1899 switch (type_kind) {
1902 case MONO_TYPE_BOOLEAN:
1905 case MONO_TYPE_CHAR:
1908 return TYPE_I4 | mask;
1912 return TYPE_NATIVE_INT | mask;
1914 /* FIXME: the spec says that you cannot have a pointer to method pointer, do we need to check this here? */
1915 case MONO_TYPE_FNPTR:
1917 case MONO_TYPE_TYPEDBYREF:
1918 return TYPE_PTR | mask;
1921 case MONO_TYPE_MVAR:
1923 case MONO_TYPE_CLASS:
1924 case MONO_TYPE_STRING:
1925 case MONO_TYPE_OBJECT:
1926 case MONO_TYPE_SZARRAY:
1927 case MONO_TYPE_ARRAY:
1928 return TYPE_COMPLEX | mask;
1932 return TYPE_I8 | mask;
1936 return TYPE_R8 | mask;
1938 case MONO_TYPE_GENERICINST:
1939 case MONO_TYPE_VALUETYPE:
1940 if (mono_type_is_enum_type (type)) {
1941 type = mono_type_get_underlying_type_any (type);
1944 type_kind = type->type;
1947 return TYPE_COMPLEX | mask;
1955 /* convert MonoType to ILStackDesc format (stype) */
1957 set_stack_value (VerifyContext *ctx, ILStackDesc *stack, MonoType *type, int take_addr)
1960 int type_kind = type->type;
1962 if (type->byref || take_addr)
1963 mask = POINTER_MASK;
1964 /* TODO handle CMMP_MASK */
1969 switch (type_kind) {
1972 case MONO_TYPE_BOOLEAN:
1975 case MONO_TYPE_CHAR:
1978 stack->stype = TYPE_I4 | mask;
1982 stack->stype = TYPE_NATIVE_INT | mask;
1985 /*FIXME: Do we need to check if it's a pointer to the method pointer? The spec says it' illegal to have that.*/
1986 case MONO_TYPE_FNPTR:
1988 case MONO_TYPE_TYPEDBYREF:
1989 stack->stype = TYPE_PTR | mask;
1992 case MONO_TYPE_CLASS:
1993 case MONO_TYPE_STRING:
1994 case MONO_TYPE_OBJECT:
1995 case MONO_TYPE_SZARRAY:
1996 case MONO_TYPE_ARRAY:
1999 case MONO_TYPE_MVAR:
2000 stack->stype = TYPE_COMPLEX | mask;
2005 stack->stype = TYPE_I8 | mask;
2009 stack->stype = TYPE_R8 | mask;
2011 case MONO_TYPE_GENERICINST:
2012 case MONO_TYPE_VALUETYPE:
2013 if (mono_type_is_enum_type (type)) {
2014 MonoType *utype = mono_type_get_underlying_type_any (type);
2016 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Could not resolve underlying type of %x at %d", type->type, ctx->ip_offset));
2020 type_kind = type->type;
2023 stack->stype = TYPE_COMPLEX | mask;
2027 VERIFIER_DEBUG ( printf ("unknown type 0x%02x in eval stack type\n", type->type); );
2028 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Illegal value set on stack 0x%02x at %d", type->type, ctx->ip_offset));
2035 * init_stack_with_value_at_exception_boundary:
2037 * Initialize the stack and push a given type.
2038 * The instruction is marked as been on the exception boundary.
2041 init_stack_with_value_at_exception_boundary (VerifyContext *ctx, ILCodeDesc *code, MonoClass *klass)
2044 MonoType *type = mono_class_inflate_generic_type_checked (&klass->byval_arg, ctx->generic_context, &error);
2046 if (!mono_error_ok (&error)) {
2047 char *name = mono_type_get_full_name (klass);
2048 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid class %s used for exception", name));
2050 mono_error_cleanup (&error);
2054 if (!ctx->max_stack) {
2055 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack overflow at 0x%04x", ctx->ip_offset));
2059 stack_init (ctx, code);
2060 ensure_stack_size (code, 1);
2061 set_stack_value (ctx, code->stack, type, FALSE);
2062 ctx->exception_types = g_slist_prepend (ctx->exception_types, type);
2064 code->flags |= IL_CODE_FLAG_WAS_TARGET;
2065 if (mono_type_is_generic_argument (type))
2066 code->stack->stype |= BOXED_MASK;
2070 get_ienumerable_class (void)
2072 static MonoClass* generic_ienumerable_class = NULL;
2074 if (generic_ienumerable_class == NULL)
2075 generic_ienumerable_class = mono_class_from_name (mono_defaults.corlib,
2076 "System.Collections.Generic", "IEnumerable`1");
2077 return generic_ienumerable_class;
2081 get_icollection_class (void)
2083 static MonoClass* generic_icollection_class = NULL;
2085 if (generic_icollection_class == NULL)
2086 generic_icollection_class = mono_class_from_name (mono_defaults.corlib,
2087 "System.Collections.Generic", "ICollection`1");
2088 return generic_icollection_class;
2092 get_ireadonlylist_class (void)
2094 static MonoClass* generic_ireadonlylist_class = NULL;
2096 if (generic_ireadonlylist_class == NULL)
2097 generic_ireadonlylist_class = mono_class_from_name (mono_defaults.corlib,
2098 "System.Collections.Generic", "IReadOnlyList`1");
2099 return generic_ireadonlylist_class;
2103 get_ireadonlycollection_class (void)
2105 static MonoClass* generic_ireadonlycollection_class = NULL;
2107 if (generic_ireadonlycollection_class == NULL)
2108 generic_ireadonlycollection_class = mono_class_from_name (mono_defaults.corlib,
2109 "System.Collections.Generic", "IReadOnlyCollection`1");
2110 return generic_ireadonlycollection_class;
2114 inflate_class_one_arg (MonoClass *gtype, MonoClass *arg0)
2117 args [0] = &arg0->byval_arg;
2119 return mono_class_bind_generic_parameters (gtype, 1, args, FALSE);
2123 verifier_inflate_and_check_compat (MonoClass *target, MonoClass *gtd, MonoClass *arg)
2126 if (!(tmp = inflate_class_one_arg (gtd, arg)))
2128 if (mono_class_is_variant_compatible (target, tmp, TRUE))
2134 verifier_class_is_assignable_from (MonoClass *target, MonoClass *candidate)
2136 MonoClass *iface_gtd;
2138 if (target == candidate)
2141 if (mono_class_has_variant_generic_params (target)) {
2142 if (MONO_CLASS_IS_INTERFACE (target)) {
2143 if (MONO_CLASS_IS_INTERFACE (candidate) && mono_class_is_variant_compatible (target, candidate, TRUE))
2146 if (candidate->rank == 1) {
2147 if (verifier_inflate_and_check_compat (target, mono_defaults.generic_ilist_class, candidate->element_class))
2149 if (verifier_inflate_and_check_compat (target, get_icollection_class (), candidate->element_class))
2151 if (verifier_inflate_and_check_compat (target, get_ienumerable_class (), candidate->element_class))
2153 if (verifier_inflate_and_check_compat (target, get_ireadonlylist_class (), candidate->element_class))
2155 if (verifier_inflate_and_check_compat (target, get_ireadonlycollection_class (), candidate->element_class))
2160 while (candidate && candidate != mono_defaults.object_class) {
2161 mono_class_setup_interfaces (candidate, &error);
2162 if (!mono_error_ok (&error)) {
2163 mono_error_cleanup (&error);
2167 /*klass is a generic variant interface, We need to extract from oklass a list of ifaces which are viable candidates.*/
2168 for (i = 0; i < candidate->interface_offsets_count; ++i) {
2169 MonoClass *iface = candidate->interfaces_packed [i];
2170 if (mono_class_is_variant_compatible (target, iface, TRUE))
2174 for (i = 0; i < candidate->interface_count; ++i) {
2175 MonoClass *iface = candidate->interfaces [i];
2176 if (mono_class_is_variant_compatible (target, iface, TRUE))
2179 candidate = candidate->parent;
2182 } else if (target->delegate) {
2183 if (mono_class_is_variant_compatible (target, candidate, TRUE))
2189 if (mono_class_is_assignable_from (target, candidate))
2192 if (!MONO_CLASS_IS_INTERFACE (target) || !target->generic_class || candidate->rank != 1)
2195 iface_gtd = target->generic_class->container_class;
2196 if (iface_gtd != mono_defaults.generic_ilist_class && iface_gtd != get_icollection_class () && iface_gtd != get_ienumerable_class ())
2199 target = mono_class_from_mono_type (target->generic_class->context.class_inst->type_argv [0]);
2200 candidate = candidate->element_class;
2205 /*Verify if type 'candidate' can be stored in type 'target'.
2207 * If strict, check for the underlying type and not the verification stack types
2210 verify_type_compatibility_full (VerifyContext *ctx, MonoType *target, MonoType *candidate, gboolean strict)
2212 #define IS_ONE_OF3(T, A, B, C) (T == A || T == B || T == C)
2213 #define IS_ONE_OF2(T, A, B) (T == A || T == B)
2215 MonoType *original_candidate = candidate;
2216 VERIFIER_DEBUG ( printf ("checking type compatibility %s x %s strict %d\n", mono_type_full_name (target), mono_type_full_name (candidate), strict); );
2218 /*only one is byref */
2219 if (candidate->byref ^ target->byref) {
2220 /* converting from native int to byref*/
2221 if (get_stack_type (candidate) == TYPE_NATIVE_INT && target->byref) {
2222 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("using byref native int at 0x%04x", ctx->ip_offset));
2227 strict |= target->byref;
2228 /*From now on we don't care about byref anymore, so it's ok to discard it here*/
2229 candidate = mono_type_get_underlying_type_any (candidate);
2232 switch (target->type) {
2233 case MONO_TYPE_VOID:
2234 return candidate->type == MONO_TYPE_VOID;
2237 case MONO_TYPE_BOOLEAN:
2239 return IS_ONE_OF3 (candidate->type, MONO_TYPE_I1, MONO_TYPE_U1, MONO_TYPE_BOOLEAN);
2242 case MONO_TYPE_CHAR:
2244 return IS_ONE_OF3 (candidate->type, MONO_TYPE_I2, MONO_TYPE_U2, MONO_TYPE_CHAR);
2246 case MONO_TYPE_U4: {
2247 gboolean is_native_int = IS_ONE_OF2 (candidate->type, MONO_TYPE_I, MONO_TYPE_U);
2248 gboolean is_int4 = IS_ONE_OF2 (candidate->type, MONO_TYPE_I4, MONO_TYPE_U4);
2250 return is_native_int || is_int4;
2251 return is_native_int || get_stack_type (candidate) == TYPE_I4;
2256 return IS_ONE_OF2 (candidate->type, MONO_TYPE_I8, MONO_TYPE_U8);
2261 return candidate->type == target->type;
2262 return IS_ONE_OF2 (candidate->type, MONO_TYPE_R4, MONO_TYPE_R8);
2266 gboolean is_native_int = IS_ONE_OF2 (candidate->type, MONO_TYPE_I, MONO_TYPE_U);
2267 gboolean is_int4 = IS_ONE_OF2 (candidate->type, MONO_TYPE_I4, MONO_TYPE_U4);
2269 return is_native_int || is_int4;
2270 return is_native_int || get_stack_type (candidate) == TYPE_I4;
2274 if (candidate->type != MONO_TYPE_PTR)
2276 /* check the underlying type */
2277 return verify_type_compatibility_full (ctx, target->data.type, candidate->data.type, TRUE);
2279 case MONO_TYPE_FNPTR: {
2280 MonoMethodSignature *left, *right;
2281 if (candidate->type != MONO_TYPE_FNPTR)
2284 left = mono_type_get_signature (target);
2285 right = mono_type_get_signature (candidate);
2286 return mono_metadata_signature_equal (left, right) && left->call_convention == right->call_convention;
2289 case MONO_TYPE_GENERICINST: {
2290 MonoClass *target_klass;
2291 MonoClass *candidate_klass;
2292 if (mono_type_is_enum_type (target)) {
2293 target = mono_type_get_underlying_type_any (target);
2299 * VAR / MVAR compatibility must be checked by verify_stack_type_compatibility
2300 * to take boxing status into account.
2302 if (mono_type_is_generic_argument (original_candidate))
2305 target_klass = mono_class_from_mono_type (target);
2306 candidate_klass = mono_class_from_mono_type (candidate);
2307 if (mono_class_is_nullable (target_klass)) {
2308 if (!mono_class_is_nullable (candidate_klass))
2310 return target_klass == candidate_klass;
2312 return verifier_class_is_assignable_from (target_klass, candidate_klass);
2315 case MONO_TYPE_STRING:
2316 return candidate->type == MONO_TYPE_STRING;
2318 case MONO_TYPE_CLASS:
2320 * VAR / MVAR compatibility must be checked by verify_stack_type_compatibility
2321 * to take boxing status into account.
2323 if (mono_type_is_generic_argument (original_candidate))
2326 if (candidate->type == MONO_TYPE_VALUETYPE)
2329 /* If candidate is an enum it should return true for System.Enum and supertypes.
2330 * That's why here we use the original type and not the underlying type.
2332 return verifier_class_is_assignable_from (target->data.klass, mono_class_from_mono_type (original_candidate));
2334 case MONO_TYPE_OBJECT:
2335 return MONO_TYPE_IS_REFERENCE (candidate);
2337 case MONO_TYPE_SZARRAY: {
2340 if (candidate->type != MONO_TYPE_SZARRAY)
2343 left = mono_class_from_mono_type (target);
2344 right = mono_class_from_mono_type (candidate);
2346 return verifier_class_is_assignable_from (left, right);
2349 case MONO_TYPE_ARRAY:
2350 if (candidate->type != MONO_TYPE_ARRAY)
2352 return is_array_type_compatible (target, candidate);
2354 case MONO_TYPE_TYPEDBYREF:
2355 return candidate->type == MONO_TYPE_TYPEDBYREF;
2357 case MONO_TYPE_VALUETYPE: {
2358 MonoClass *target_klass;
2359 MonoClass *candidate_klass;
2361 if (candidate->type == MONO_TYPE_CLASS)
2364 target_klass = mono_class_from_mono_type (target);
2365 candidate_klass = mono_class_from_mono_type (candidate);
2366 if (target_klass == candidate_klass)
2368 if (mono_type_is_enum_type (target)) {
2369 target = mono_type_get_underlying_type_any (target);
2378 if (candidate->type != MONO_TYPE_VAR)
2380 return mono_type_get_generic_param_num (candidate) == mono_type_get_generic_param_num (target);
2382 case MONO_TYPE_MVAR:
2383 if (candidate->type != MONO_TYPE_MVAR)
2385 return mono_type_get_generic_param_num (candidate) == mono_type_get_generic_param_num (target);
2388 VERIFIER_DEBUG ( printf ("unknown store type %d\n", target->type); );
2389 g_assert_not_reached ();
2398 verify_type_compatibility (VerifyContext *ctx, MonoType *target, MonoType *candidate)
2400 return verify_type_compatibility_full (ctx, target, candidate, FALSE);
2404 * Returns the generic param bound to the context been verified.
2407 static MonoGenericParam*
2408 get_generic_param (VerifyContext *ctx, MonoType *param)
2410 guint16 param_num = mono_type_get_generic_param_num (param);
2411 if (param->type == MONO_TYPE_VAR) {
2412 if (!ctx->generic_context->class_inst || ctx->generic_context->class_inst->type_argc <= param_num) {
2413 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid generic type argument %d", param_num));
2416 return ctx->generic_context->class_inst->type_argv [param_num]->data.generic_param;
2419 /*param must be a MVAR */
2420 if (!ctx->generic_context->method_inst || ctx->generic_context->method_inst->type_argc <= param_num) {
2421 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid generic method argument %d", param_num));
2424 return ctx->generic_context->method_inst->type_argv [param_num]->data.generic_param;
2429 recursive_boxed_constraint_type_check (VerifyContext *ctx, MonoType *type, MonoClass *constraint_class, int recursion_level)
2431 MonoType *constraint_type = &constraint_class->byval_arg;
2432 if (recursion_level <= 0)
2435 if (verify_type_compatibility_full (ctx, type, mono_type_get_type_byval (constraint_type), FALSE))
2438 if (mono_type_is_generic_argument (constraint_type)) {
2439 MonoGenericParam *param = get_generic_param (ctx, constraint_type);
2443 for (class = mono_generic_param_info (param)->constraints; class && *class; ++class) {
2444 if (recursive_boxed_constraint_type_check (ctx, type, *class, recursion_level - 1))
2452 * is_compatible_boxed_valuetype:
2454 * Returns TRUE if @candidate / @stack is a valid boxed valuetype.
2456 * @type The source type. It it tested to be of the proper type.
2457 * @candidate type of the boxed valuetype.
2458 * @stack stack slot of the boxed valuetype, separate from @candidade since one could be changed before calling this function
2459 * @strict if TRUE candidate must be boxed compatible to the target type
2463 is_compatible_boxed_valuetype (VerifyContext *ctx, MonoType *type, MonoType *candidate, ILStackDesc *stack, gboolean strict)
2465 if (!stack_slot_is_boxed_value (stack))
2467 if (type->byref || candidate->byref)
2470 if (mono_type_is_generic_argument (candidate)) {
2471 MonoGenericParam *param = get_generic_param (ctx, candidate);
2476 for (class = mono_generic_param_info (param)->constraints; class && *class; ++class) {
2477 /*256 should be enough since there can't be more than 255 generic arguments.*/
2478 if (recursive_boxed_constraint_type_check (ctx, type, *class, 256))
2483 if (mono_type_is_generic_argument (type))
2489 return MONO_TYPE_IS_REFERENCE (type) && verifier_class_is_assignable_from (mono_class_from_mono_type (type), mono_class_from_mono_type (candidate));
2493 verify_stack_type_compatibility_full (VerifyContext *ctx, MonoType *type, ILStackDesc *stack, gboolean drop_byref, gboolean valuetype_must_be_boxed)
2495 MonoType *candidate = mono_type_from_stack_slot (stack);
2496 if (MONO_TYPE_IS_REFERENCE (type) && !type->byref && stack_slot_is_null_literal (stack))
2499 if (is_compatible_boxed_valuetype (ctx, type, candidate, stack, TRUE))
2502 if (valuetype_must_be_boxed && !stack_slot_is_boxed_value (stack) && !MONO_TYPE_IS_REFERENCE (candidate))
2505 if (!valuetype_must_be_boxed && stack_slot_is_boxed_value (stack))
2509 return verify_type_compatibility_full (ctx, type, mono_type_get_type_byval (candidate), FALSE);
2511 return verify_type_compatibility_full (ctx, type, candidate, FALSE);
2515 verify_stack_type_compatibility (VerifyContext *ctx, MonoType *type, ILStackDesc *stack)
2517 return verify_stack_type_compatibility_full (ctx, type, stack, FALSE, FALSE);
2521 mono_delegate_type_equal (MonoType *target, MonoType *candidate)
2523 if (candidate->byref ^ target->byref)
2526 switch (target->type) {
2527 case MONO_TYPE_VOID:
2530 case MONO_TYPE_BOOLEAN:
2533 case MONO_TYPE_CHAR:
2542 case MONO_TYPE_STRING:
2543 case MONO_TYPE_TYPEDBYREF:
2544 return candidate->type == target->type;
2547 if (candidate->type != MONO_TYPE_PTR)
2549 return mono_delegate_type_equal (target->data.type, candidate->data.type);
2551 case MONO_TYPE_FNPTR:
2552 if (candidate->type != MONO_TYPE_FNPTR)
2554 return mono_delegate_signature_equal (mono_type_get_signature (target), mono_type_get_signature (candidate), FALSE);
2556 case MONO_TYPE_GENERICINST: {
2557 MonoClass *target_klass;
2558 MonoClass *candidate_klass;
2559 target_klass = mono_class_from_mono_type (target);
2560 candidate_klass = mono_class_from_mono_type (candidate);
2561 /*FIXME handle nullables and enum*/
2562 return verifier_class_is_assignable_from (target_klass, candidate_klass);
2564 case MONO_TYPE_OBJECT:
2565 return MONO_TYPE_IS_REFERENCE (candidate);
2567 case MONO_TYPE_CLASS:
2568 return verifier_class_is_assignable_from(target->data.klass, mono_class_from_mono_type (candidate));
2570 case MONO_TYPE_SZARRAY:
2571 if (candidate->type != MONO_TYPE_SZARRAY)
2573 return verifier_class_is_assignable_from (mono_class_from_mono_type (target)->element_class, mono_class_from_mono_type (candidate)->element_class);
2575 case MONO_TYPE_ARRAY:
2576 if (candidate->type != MONO_TYPE_ARRAY)
2578 return is_array_type_compatible (target, candidate);
2580 case MONO_TYPE_VALUETYPE:
2581 /*FIXME handle nullables and enum*/
2582 return mono_class_from_mono_type (candidate) == mono_class_from_mono_type (target);
2585 return candidate->type == MONO_TYPE_VAR && mono_type_get_generic_param_num (target) == mono_type_get_generic_param_num (candidate);
2588 case MONO_TYPE_MVAR:
2589 return candidate->type == MONO_TYPE_MVAR && mono_type_get_generic_param_num (target) == mono_type_get_generic_param_num (candidate);
2593 VERIFIER_DEBUG ( printf ("Unknown type %d. Implement me!\n", target->type); );
2594 g_assert_not_reached ();
2600 mono_delegate_param_equal (MonoType *delegate, MonoType *method)
2602 if (mono_metadata_type_equal_full (delegate, method, TRUE))
2605 return mono_delegate_type_equal (method, delegate);
2609 mono_delegate_ret_equal (MonoType *delegate, MonoType *method)
2611 if (mono_metadata_type_equal_full (delegate, method, TRUE))
2614 return mono_delegate_type_equal (delegate, method);
2618 * mono_delegate_signature_equal:
2620 * Compare two signatures in the way expected by delegates.
2622 * This function only exists due to the fact that it should ignore the 'has_this' part of the signature.
2624 * FIXME can this function be eliminated and proper metadata functionality be used?
2627 mono_delegate_signature_equal (MonoMethodSignature *delegate_sig, MonoMethodSignature *method_sig, gboolean is_static_ldftn)
2630 int method_offset = is_static_ldftn ? 1 : 0;
2632 if (delegate_sig->param_count + method_offset != method_sig->param_count)
2635 if (delegate_sig->call_convention != method_sig->call_convention)
2638 for (i = 0; i < delegate_sig->param_count; i++) {
2639 MonoType *p1 = delegate_sig->params [i];
2640 MonoType *p2 = method_sig->params [i + method_offset];
2642 if (!mono_delegate_param_equal (p1, p2))
2646 if (!mono_delegate_ret_equal (delegate_sig->ret, method_sig->ret))
2653 mono_verifier_is_signature_compatible (MonoMethodSignature *target, MonoMethodSignature *candidate)
2655 return mono_delegate_signature_equal (target, candidate, FALSE);
2659 * verify_ldftn_delegate:
2661 * Verify properties of ldftn based delegates.
2664 verify_ldftn_delegate (VerifyContext *ctx, MonoClass *delegate, ILStackDesc *value, ILStackDesc *funptr)
2666 MonoMethod *method = funptr->method;
2668 /*ldftn non-final virtuals only allowed if method is not static,
2669 * the object is a this arg (comes from a ldarg.0), and there is no starg.0.
2670 * This rules doesn't apply if the object on stack is a boxed valuetype.
2672 if ((method->flags & METHOD_ATTRIBUTE_VIRTUAL) && !(method->flags & METHOD_ATTRIBUTE_FINAL) && !(method->klass->flags & TYPE_ATTRIBUTE_SEALED) && !stack_slot_is_boxed_value (value)) {
2673 /*A stdarg 0 must not happen, we fail here only in fail fast mode to avoid double error reports*/
2674 if (IS_FAIL_FAST_MODE (ctx) && ctx->has_this_store)
2675 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid ldftn with virtual function in method with stdarg 0 at 0x%04x", ctx->ip_offset));
2677 /*current method must not be static*/
2678 if (ctx->method->flags & METHOD_ATTRIBUTE_STATIC)
2679 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid ldftn with virtual function at 0x%04x", ctx->ip_offset));
2681 /*value is the this pointer, loaded using ldarg.0 */
2682 if (!stack_slot_is_this_pointer (value))
2683 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));
2685 ctx->code [ctx->ip_offset].flags |= IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL;
2690 * verify_delegate_compatibility:
2692 * Verify delegate creation sequence.
2696 verify_delegate_compatibility (VerifyContext *ctx, MonoClass *delegate, ILStackDesc *value, ILStackDesc *funptr)
2698 #define IS_VALID_OPCODE(offset, opcode) (ip [ip_offset - offset] == opcode && (ctx->code [ip_offset - offset].flags & IL_CODE_FLAG_SEEN))
2699 #define IS_LOAD_FUN_PTR(kind) (IS_VALID_OPCODE (6, CEE_PREFIX1) && ip [ip_offset - 5] == kind)
2701 MonoMethod *invoke, *method;
2702 const guint8 *ip = ctx->header->code;
2703 guint32 ip_offset = ctx->ip_offset;
2704 gboolean is_static_ldftn = FALSE, is_first_arg_bound = FALSE;
2706 if (stack_slot_get_type (funptr) != TYPE_PTR || !funptr->method) {
2707 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid function pointer parameter for delegate constructor at 0x%04x", ctx->ip_offset));
2711 invoke = mono_get_delegate_invoke (delegate);
2712 method = funptr->method;
2714 if (!method || !mono_method_signature (method)) {
2715 char *name = mono_type_get_full_name (delegate);
2716 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid method on stack to create delegate %s construction at 0x%04x", name, ctx->ip_offset));
2721 if (!invoke || !mono_method_signature (invoke)) {
2722 char *name = mono_type_get_full_name (delegate);
2723 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Delegate type %s with bad Invoke method at 0x%04x", name, ctx->ip_offset));
2728 is_static_ldftn = (ip_offset > 5 && IS_LOAD_FUN_PTR (CEE_LDFTN)) && method->flags & METHOD_ATTRIBUTE_STATIC;
2730 if (is_static_ldftn)
2731 is_first_arg_bound = mono_method_signature (invoke)->param_count + 1 == mono_method_signature (method)->param_count;
2733 if (!mono_delegate_signature_equal (mono_method_signature (invoke), mono_method_signature (method), is_first_arg_bound)) {
2734 char *fun_sig = mono_signature_get_desc (mono_method_signature (method), FALSE);
2735 char *invoke_sig = mono_signature_get_desc (mono_method_signature (invoke), FALSE);
2736 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));
2738 g_free (invoke_sig);
2742 * Delegate code sequences:
2748 * [-6] ldvirtftn token
2752 if (ip_offset > 5 && IS_LOAD_FUN_PTR (CEE_LDFTN)) {
2753 verify_ldftn_delegate (ctx, delegate, value, funptr);
2754 } else if (ip_offset > 6 && IS_VALID_OPCODE (7, CEE_DUP) && IS_LOAD_FUN_PTR (CEE_LDVIRTFTN)) {
2755 ctx->code [ip_offset - 6].flags |= IL_CODE_DELEGATE_SEQUENCE;
2757 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid code sequence for delegate creation at 0x%04x", ctx->ip_offset));
2759 ctx->code [ip_offset].flags |= IL_CODE_DELEGATE_SEQUENCE;
2762 if (is_first_arg_bound) {
2763 if (mono_method_signature (method)->param_count == 0 || !verify_stack_type_compatibility_full (ctx, mono_method_signature (method)->params [0], value, FALSE, TRUE))
2764 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("This object not compatible with function pointer for delegate creation at 0x%04x", ctx->ip_offset));
2766 if (method->flags & METHOD_ATTRIBUTE_STATIC) {
2767 if (!stack_slot_is_null_literal (value) && !is_first_arg_bound)
2768 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Non-null this args used with static function for delegate creation at 0x%04x", ctx->ip_offset));
2770 if (!verify_stack_type_compatibility_full (ctx, &method->klass->byval_arg, value, FALSE, TRUE) && !stack_slot_is_null_literal (value))
2771 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("This object not compatible with function pointer for delegate creation at 0x%04x", ctx->ip_offset));
2775 if (stack_slot_get_type (value) != TYPE_COMPLEX)
2776 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid first parameter for delegate creation at 0x%04x", ctx->ip_offset));
2778 #undef IS_VALID_OPCODE
2779 #undef IS_LOAD_FUN_PTR
2782 /* implement the opcode checks*/
2784 push_arg (VerifyContext *ctx, unsigned int arg, int take_addr)
2788 if (arg >= ctx->max_args) {
2790 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have argument %d", arg + 1));
2792 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method doesn't have argument %d", arg + 1));
2793 if (check_overflow (ctx)) //FIXME: what sane value could we ever push?
2794 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
2796 } else if (check_overflow (ctx)) {
2797 /*We must let the value be pushed, otherwise we would get an underflow error*/
2798 check_unverifiable_type (ctx, ctx->params [arg]);
2799 if (ctx->params [arg]->byref && take_addr)
2800 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ByRef of ByRef at 0x%04x", ctx->ip_offset));
2801 top = stack_push (ctx);
2802 if (!set_stack_value (ctx, top, ctx->params [arg], take_addr))
2805 if (arg == 0 && !(ctx->method->flags & METHOD_ATTRIBUTE_STATIC)) {
2807 ctx->has_this_store = TRUE;
2809 top->stype |= THIS_POINTER_MASK;
2810 if (mono_method_is_constructor (ctx->method) && !ctx->super_ctor_called && !ctx->method->klass->valuetype)
2811 top->stype |= UNINIT_THIS_MASK;
2817 push_local (VerifyContext *ctx, guint32 arg, int take_addr)
2819 if (arg >= ctx->num_locals) {
2820 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have local %d", arg + 1));
2821 } else if (check_overflow (ctx)) {
2822 /*We must let the value be pushed, otherwise we would get an underflow error*/
2823 check_unverifiable_type (ctx, ctx->locals [arg]);
2824 if (ctx->locals [arg]->byref && take_addr)
2825 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ByRef of ByRef at 0x%04x", ctx->ip_offset));
2827 set_stack_value (ctx, stack_push (ctx), ctx->locals [arg], take_addr);
2832 store_arg (VerifyContext *ctx, guint32 arg)
2836 if (arg >= ctx->max_args) {
2837 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method doesn't have argument %d at 0x%04x", arg + 1, ctx->ip_offset));
2838 if (check_underflow (ctx, 1))
2843 if (check_underflow (ctx, 1)) {
2844 value = stack_pop (ctx);
2845 if (!verify_stack_type_compatibility (ctx, ctx->params [arg], value)) {
2846 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type %s in argument store at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
2849 if (arg == 0 && !(ctx->method->flags & METHOD_ATTRIBUTE_STATIC))
2850 ctx->has_this_store = 1;
2854 store_local (VerifyContext *ctx, guint32 arg)
2857 if (arg >= ctx->num_locals) {
2858 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have local var %d at 0x%04x", arg + 1, ctx->ip_offset));
2862 /*TODO verify definite assigment */
2863 if (!check_underflow (ctx, 1))
2866 value = stack_pop (ctx);
2867 if (ctx->locals [arg]->byref && stack_slot_is_managed_mutability_pointer (value))
2868 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));
2870 if (!verify_stack_type_compatibility (ctx, ctx->locals [arg], value)) {
2871 char *expected = mono_type_full_name (ctx->locals [arg]);
2872 char *found = stack_slot_full_name (value);
2873 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type '%s' on stack cannot be stored to local %d with type '%s' at 0x%04x",
2883 /*FIXME add and sub needs special care here*/
2885 do_binop (VerifyContext *ctx, unsigned int opcode, const unsigned char table [TYPE_MAX][TYPE_MAX])
2887 ILStackDesc *a, *b, *top;
2888 int idxa, idxb, complexMerge = 0;
2891 if (!check_underflow (ctx, 2))
2893 b = stack_pop (ctx);
2894 a = stack_pop (ctx);
2896 idxa = stack_slot_get_underlying_type (a);
2897 if (stack_slot_is_managed_pointer (a)) {
2902 idxb = stack_slot_get_underlying_type (b);
2903 if (stack_slot_is_managed_pointer (b)) {
2910 res = table [idxa][idxb];
2912 VERIFIER_DEBUG ( printf ("binop res %d\n", res); );
2913 VERIFIER_DEBUG ( printf ("idxa %d idxb %d\n", idxa, idxb); );
2915 top = stack_push (ctx);
2916 if (res == TYPE_INV) {
2917 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)));
2918 copy_stack_value (top, a);
2922 if (res & NON_VERIFIABLE_RESULT) {
2923 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)));
2925 res = res & ~NON_VERIFIABLE_RESULT;
2928 if (complexMerge && res == TYPE_PTR) {
2929 if (complexMerge == 1)
2930 copy_stack_value (top, a);
2931 else if (complexMerge == 2)
2932 copy_stack_value (top, b);
2934 * There is no need to merge the type of two pointers.
2935 * The only valid operation is subtraction, that returns a native
2936 * int as result and can be used with any 2 pointer kinds.
2937 * This is valid acording to Patition III 1.1.4
2946 do_boolean_branch_op (VerifyContext *ctx, int delta)
2948 int target = ctx->ip_offset + delta;
2951 VERIFIER_DEBUG ( printf ("boolean branch offset %d delta %d target %d\n", ctx->ip_offset, delta, target); );
2953 if (target < 0 || target >= ctx->code_size) {
2954 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Boolean branch target out of code at 0x%04x", ctx->ip_offset));
2958 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
2960 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
2963 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
2967 ctx->target = target;
2969 if (!check_underflow (ctx, 1))
2972 top = stack_pop (ctx);
2973 if (!is_valid_bool_arg (top))
2974 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));
2976 check_unmanaged_pointer (ctx, top);
2980 stack_slot_is_complex_type_not_reference_type (ILStackDesc *slot)
2982 return stack_slot_get_type (slot) == TYPE_COMPLEX && !MONO_TYPE_IS_REFERENCE (slot->type) && !stack_slot_is_boxed_value (slot);
2986 do_branch_op (VerifyContext *ctx, signed int delta, const unsigned char table [TYPE_MAX][TYPE_MAX])
2991 int target = ctx->ip_offset + delta;
2993 VERIFIER_DEBUG ( printf ("branch offset %d delta %d target %d\n", ctx->ip_offset, delta, target); );
2995 if (target < 0 || target >= ctx->code_size) {
2996 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target out of code at 0x%04x", ctx->ip_offset));
3000 switch (is_valid_cmp_branch_instruction (ctx->header, ctx->ip_offset, target)) {
3001 case 1: /*FIXME use constants and not magic numbers.*/
3002 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
3005 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
3009 ctx->target = target;
3011 if (!check_underflow (ctx, 2))
3014 b = stack_pop (ctx);
3015 a = stack_pop (ctx);
3017 idxa = stack_slot_get_underlying_type (a);
3018 if (stack_slot_is_managed_pointer (a))
3021 idxb = stack_slot_get_underlying_type (b);
3022 if (stack_slot_is_managed_pointer (b))
3025 if (stack_slot_is_complex_type_not_reference_type (a) || stack_slot_is_complex_type_not_reference_type (b)) {
3030 res = table [idxa][idxb];
3033 VERIFIER_DEBUG ( printf ("branch res %d\n", res); );
3034 VERIFIER_DEBUG ( printf ("idxa %d idxb %d\n", idxa, idxb); );
3036 if (res == TYPE_INV) {
3037 CODE_NOT_VERIFIABLE (ctx,
3038 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));
3039 } else if (res & NON_VERIFIABLE_RESULT) {
3040 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));
3041 res = res & ~NON_VERIFIABLE_RESULT;
3046 do_cmp_op (VerifyContext *ctx, const unsigned char table [TYPE_MAX][TYPE_MAX], guint32 opcode)
3052 if (!check_underflow (ctx, 2))
3054 b = stack_pop (ctx);
3055 a = stack_pop (ctx);
3057 if (opcode == CEE_CGT_UN) {
3058 if (stack_slot_get_type (a) == TYPE_COMPLEX && stack_slot_get_type (b) == TYPE_COMPLEX) {
3059 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3064 idxa = stack_slot_get_underlying_type (a);
3065 if (stack_slot_is_managed_pointer (a))
3068 idxb = stack_slot_get_underlying_type (b);
3069 if (stack_slot_is_managed_pointer (b))
3072 if (stack_slot_is_complex_type_not_reference_type (a) || stack_slot_is_complex_type_not_reference_type (b)) {
3077 res = table [idxa][idxb];
3080 if(res == TYPE_INV) {
3081 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf("Compare instruction applyed to ill formed stack (%s x %s) at 0x%04x", stack_slot_get_name (a), stack_slot_get_name (b), ctx->ip_offset));
3082 } else if (res & NON_VERIFIABLE_RESULT) {
3083 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));
3084 res = res & ~NON_VERIFIABLE_RESULT;
3086 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3090 do_ret (VerifyContext *ctx)
3092 MonoType *ret = ctx->signature->ret;
3093 VERIFIER_DEBUG ( printf ("checking ret\n"); );
3094 if (ret->type != MONO_TYPE_VOID) {
3096 if (!check_underflow (ctx, 1))
3099 top = stack_pop(ctx);
3101 if (!verify_stack_type_compatibility (ctx, ctx->signature->ret, top)) {
3102 char *ret_type = mono_type_full_name (ctx->signature->ret);
3103 char *stack_type = stack_slot_full_name (top);
3104 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));
3105 g_free (stack_type);
3110 if (ret->byref || ret->type == MONO_TYPE_TYPEDBYREF || mono_type_is_value_type (ret, "System", "ArgIterator") || mono_type_is_value_type (ret, "System", "RuntimeArgumentHandle"))
3111 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method returns byref, TypedReference, ArgIterator or RuntimeArgumentHandle at 0x%04x", ctx->ip_offset));
3114 if (ctx->eval.size > 0) {
3115 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack not empty (%d) after ret at 0x%04x", ctx->eval.size, ctx->ip_offset));
3117 if (in_any_block (ctx->header, ctx->ip_offset))
3118 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ret cannot escape exception blocks at 0x%04x", ctx->ip_offset));
3122 * 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.
3123 * This is illegal but mono_get_method_full decoded it.
3124 * TODO handle calling .ctor outside one or calling the .ctor for other class but super
3127 do_invoke_method (VerifyContext *ctx, int method_token, gboolean virtual)
3130 MonoMethodSignature *sig;
3133 gboolean virt_check_this = FALSE;
3134 gboolean constrained = ctx->prefix_set & PREFIX_CONSTRAINED;
3136 if (!(method = verifier_load_method (ctx, method_token, virtual ? "callvirt" : "call")))
3140 CLEAR_PREFIX (ctx, PREFIX_CONSTRAINED);
3142 if (method->klass->valuetype) // && !constrained ???
3143 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use callvirtual with valuetype method at 0x%04x", ctx->ip_offset));
3145 if ((method->flags & METHOD_ATTRIBUTE_STATIC))
3146 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use callvirtual with static method at 0x%04x", ctx->ip_offset));
3149 if (method->flags & METHOD_ATTRIBUTE_ABSTRACT)
3150 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use call with an abstract method at 0x%04x", ctx->ip_offset));
3152 if ((method->flags & METHOD_ATTRIBUTE_VIRTUAL) && !(method->flags & METHOD_ATTRIBUTE_FINAL) && !(method->klass->flags & TYPE_ATTRIBUTE_SEALED)) {
3153 virt_check_this = TRUE;
3154 ctx->code [ctx->ip_offset].flags |= IL_CODE_CALL_NONFINAL_VIRTUAL;
3158 if (!(sig = mono_method_get_signature_full (method, ctx->image, method_token, ctx->generic_context)))
3159 sig = mono_method_get_signature (method, ctx->image, method_token);
3162 char *name = mono_type_get_full_name (method->klass);
3163 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Could not resolve signature of %s:%s at 0x%04x", name, method->name, ctx->ip_offset));
3168 param_count = sig->param_count + sig->hasthis;
3169 if (!check_underflow (ctx, param_count))
3172 for (i = sig->param_count - 1; i >= 0; --i) {
3173 VERIFIER_DEBUG ( printf ("verifying argument %d\n", i); );
3174 value = stack_pop (ctx);
3175 if (!verify_stack_type_compatibility (ctx, sig->params[i], value)) {
3176 char *stack_name = stack_slot_full_name (value);
3177 char *sig_name = mono_type_full_name (sig->params [i]);
3178 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));
3179 g_free (stack_name);
3183 if (stack_slot_is_managed_mutability_pointer (value))
3184 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));
3186 if ((ctx->prefix_set & PREFIX_TAIL) && stack_slot_is_managed_pointer (value)) {
3187 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));
3193 MonoType *type = &method->klass->byval_arg;
3196 if (mono_method_is_constructor (method) && !method->klass->valuetype) {
3197 if (IS_STRICT_MODE (ctx) && !mono_method_is_constructor (ctx->method))
3198 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot call a constructor outside one at 0x%04x", ctx->ip_offset));
3199 if (IS_STRICT_MODE (ctx) && method->klass != ctx->method->klass->parent && method->klass != ctx->method->klass)
3200 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));
3202 ctx->super_ctor_called = TRUE;
3203 value = stack_pop_safe (ctx);
3204 if (IS_STRICT_MODE (ctx) && (value->stype & THIS_POINTER_MASK) != THIS_POINTER_MASK)
3205 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid 'this ptr' argument for constructor at 0x%04x", ctx->ip_offset));
3207 value = stack_pop (ctx);
3210 copy_stack_value (©, value);
3211 //TODO we should extract this to a 'drop_byref_argument' and use everywhere
3212 //Other parts of the code suffer from the same issue of
3213 copy.type = mono_type_get_type_byval (copy.type);
3214 copy.stype &= ~POINTER_MASK;
3216 if (virt_check_this && !stack_slot_is_this_pointer (value) && !(method->klass->valuetype || stack_slot_is_boxed_value (value)))
3217 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));
3219 if (constrained && virtual) {
3220 if (!stack_slot_is_managed_pointer (value))
3221 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Object is not a managed pointer for a constrained call at 0x%04x", ctx->ip_offset));
3222 if (!mono_metadata_type_equal_full (mono_type_get_type_byval (value->type), ctx->constrained_type, TRUE))
3223 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Object not compatible with constrained type at 0x%04x", ctx->ip_offset));
3224 copy.stype |= BOXED_MASK;
3226 if (stack_slot_is_managed_pointer (value) && !mono_class_from_mono_type (value->type)->valuetype)
3227 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));
3229 if (!virtual && mono_class_from_mono_type (value->type)->valuetype && !method->klass->valuetype && !stack_slot_is_boxed_value (value))
3230 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot call a valuetype baseclass at 0x%04x", ctx->ip_offset));
3232 if (virtual && mono_class_from_mono_type (value->type)->valuetype && !stack_slot_is_boxed_value (value))
3233 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a valuetype with callvirt at 0x%04x", ctx->ip_offset));
3235 if (method->klass->valuetype && (stack_slot_is_boxed_value (value) || !stack_slot_is_managed_pointer (value)))
3236 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));
3238 if (!verify_stack_type_compatibility (ctx, type, ©)) {
3239 char *expected = mono_type_full_name (type);
3240 char *effective = stack_slot_full_name (©);
3241 char *method_name = mono_method_full_name (method, TRUE);
3242 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",
3243 expected, effective, method_name, ctx->ip_offset));
3244 g_free (method_name);
3249 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, mono_class_from_mono_type (value->type))) {
3250 char *name = mono_method_full_name (method, TRUE);
3251 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Method %s is not accessible at 0x%04x", name, ctx->ip_offset), MONO_EXCEPTION_METHOD_ACCESS);
3255 } else if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, NULL)) {
3256 char *name = mono_method_full_name (method, TRUE);
3257 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Method %s is not accessible at 0x%04x", name, ctx->ip_offset), MONO_EXCEPTION_METHOD_ACCESS);
3261 if (sig->ret->type != MONO_TYPE_VOID) {
3262 if (!mono_type_is_valid_in_context (ctx, sig->ret))
3265 if (check_overflow (ctx)) {
3266 value = stack_push (ctx);
3267 set_stack_value (ctx, value, sig->ret, FALSE);
3268 if ((ctx->prefix_set & PREFIX_READONLY) && method->klass->rank && !strcmp (method->name, "Address")) {
3269 ctx->prefix_set &= ~PREFIX_READONLY;
3270 value->stype |= CMMP_MASK;
3275 if ((ctx->prefix_set & PREFIX_TAIL)) {
3276 if (!mono_delegate_ret_equal (mono_method_signature (ctx->method)->ret, sig->ret))
3277 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Tail call with incompatible return type at 0x%04x", ctx->ip_offset));
3278 if (ctx->header->code [ctx->ip_offset + 5] != CEE_RET)
3279 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Tail call not followed by ret at 0x%04x", ctx->ip_offset));
3285 do_push_static_field (VerifyContext *ctx, int token, gboolean take_addr)
3287 MonoClassField *field;
3289 if (!check_overflow (ctx))
3292 CLEAR_PREFIX (ctx, PREFIX_VOLATILE);
3294 if (!(field = verifier_load_field (ctx, token, &klass, take_addr ? "ldsflda" : "ldsfld")))
3297 if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC)) {
3298 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot load non static field at 0x%04x", ctx->ip_offset));
3301 /*taking the address of initonly field only works from the static constructor */
3302 if (take_addr && (field->type->attrs & FIELD_ATTRIBUTE_INIT_ONLY) &&
3303 !(field->parent == ctx->method->klass && (ctx->method->flags & (METHOD_ATTRIBUTE_SPECIAL_NAME | METHOD_ATTRIBUTE_STATIC)) && !strcmp (".cctor", ctx->method->name)))
3304 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a init-only field at 0x%04x", ctx->ip_offset));
3306 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3307 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3309 set_stack_value (ctx, stack_push (ctx), field->type, take_addr);
3313 do_store_static_field (VerifyContext *ctx, int token) {
3314 MonoClassField *field;
3317 CLEAR_PREFIX (ctx, PREFIX_VOLATILE);
3319 if (!check_underflow (ctx, 1))
3322 value = stack_pop (ctx);
3324 if (!(field = verifier_load_field (ctx, token, &klass, "stsfld")))
3327 if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC)) {
3328 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot store non static field at 0x%04x", ctx->ip_offset));
3332 if (field->type->type == MONO_TYPE_TYPEDBYREF) {
3333 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Typedbyref field is an unverfiable type in store static field at 0x%04x", ctx->ip_offset));
3337 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3338 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3340 if (!verify_stack_type_compatibility (ctx, field->type, value)) {
3341 char *stack_name = stack_slot_full_name (value);
3342 char *field_name = mono_type_full_name (field->type);
3343 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type in static field store expected '%s' but found '%s' at 0x%04x",
3344 field_name, stack_name, ctx->ip_offset));
3345 g_free (field_name);
3346 g_free (stack_name);
3351 check_is_valid_type_for_field_ops (VerifyContext *ctx, int token, ILStackDesc *obj, MonoClassField **ret_field, const char *opcode)
3353 MonoClassField *field;
3355 gboolean is_pointer;
3357 /*must be a reference type, a managed pointer, an unamanaged pointer, or a valuetype*/
3358 if (!(field = verifier_load_field (ctx, token, &klass, opcode)))
3362 //the value on stack is going to be used as a pointer
3363 is_pointer = stack_slot_get_type (obj) == TYPE_PTR || (stack_slot_get_type (obj) == TYPE_NATIVE_INT && !get_stack_type (&field->parent->byval_arg));
3365 if (field->type->type == MONO_TYPE_TYPEDBYREF) {
3366 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Typedbyref field is an unverfiable type at 0x%04x", ctx->ip_offset));
3369 g_assert (obj->type);
3371 /*The value on the stack must be a subclass of the defining type of the field*/
3372 /* we need to check if we can load the field from the stack value*/
3374 if (stack_slot_get_underlying_type (obj) == TYPE_NATIVE_INT)
3375 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Native int is not a verifiable type to reference a field at 0x%04x", ctx->ip_offset));
3377 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3378 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3380 if (!field->parent->valuetype && stack_slot_is_managed_pointer (obj))
3381 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));
3383 /*a value type can be loaded from a value or a managed pointer, but not a boxed object*/
3384 if (field->parent->valuetype && stack_slot_is_boxed_value (obj))
3385 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));
3387 if (!stack_slot_is_null_literal (obj) && !verify_stack_type_compatibility_full (ctx, &field->parent->byval_arg, obj, TRUE, FALSE)) {
3388 char *found = stack_slot_full_name (obj);
3389 char *expected = mono_type_full_name (&field->parent->byval_arg);
3390 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));
3395 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, mono_class_from_mono_type (obj->type)))
3396 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3399 check_unmanaged_pointer (ctx, obj);
3404 do_push_field (VerifyContext *ctx, int token, gboolean take_addr)
3407 MonoClassField *field;
3410 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3412 if (!check_underflow (ctx, 1))
3414 obj = stack_pop_safe (ctx);
3416 if (!check_is_valid_type_for_field_ops (ctx, token, obj, &field, take_addr ? "ldflda" : "ldfld"))
3419 if (take_addr && field->parent->valuetype && !stack_slot_is_managed_pointer (obj))
3420 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a temporary value-type at 0x%04x", ctx->ip_offset));
3422 if (take_addr && (field->type->attrs & FIELD_ATTRIBUTE_INIT_ONLY) &&
3423 !(field->parent == ctx->method->klass && mono_method_is_constructor (ctx->method)))
3424 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a init-only field at 0x%04x", ctx->ip_offset));
3426 set_stack_value (ctx, stack_push (ctx), field->type, take_addr);
3430 do_store_field (VerifyContext *ctx, int token)
3432 ILStackDesc *value, *obj;
3433 MonoClassField *field;
3434 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3436 if (!check_underflow (ctx, 2))
3439 value = stack_pop (ctx);
3440 obj = stack_pop_safe (ctx);
3442 if (!check_is_valid_type_for_field_ops (ctx, token, obj, &field, "stfld"))
3445 if (!verify_stack_type_compatibility (ctx, field->type, value))
3446 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type %s in field store at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3449 /*TODO proper handle for Nullable<T>*/
3451 do_box_value (VerifyContext *ctx, int klass_token)
3454 MonoType *type = get_boxable_mono_type (ctx, klass_token, "box");
3460 if (!check_underflow (ctx, 1))
3463 value = stack_pop (ctx);
3464 /*box is a nop for reference types*/
3466 if (stack_slot_get_underlying_type (value) == TYPE_COMPLEX && MONO_TYPE_IS_REFERENCE (value->type) && MONO_TYPE_IS_REFERENCE (type)) {
3467 stack_push_stack_val (ctx, value)->stype |= BOXED_MASK;
3472 if (!verify_stack_type_compatibility (ctx, type, value))
3473 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for boxing operation at 0x%04x", ctx->ip_offset));
3475 klass = mono_class_from_mono_type (type);
3476 if (mono_class_is_nullable (klass))
3477 type = &mono_class_get_nullable_param (klass)->byval_arg;
3478 stack_push_val (ctx, TYPE_COMPLEX | BOXED_MASK, type);
3482 do_unbox_value (VerifyContext *ctx, int klass_token)
3485 MonoType *type = get_boxable_mono_type (ctx, klass_token, "unbox");
3490 if (!check_underflow (ctx, 1))
3493 if (!mono_class_from_mono_type (type)->valuetype)
3494 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid reference type for unbox at 0x%04x", ctx->ip_offset));
3496 value = stack_pop (ctx);
3498 /*Value should be: a boxed valuetype or a reference type*/
3499 if (!(stack_slot_get_type (value) == TYPE_COMPLEX &&
3500 (stack_slot_is_boxed_value (value) || !mono_class_from_mono_type (value->type)->valuetype)))
3501 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));
3503 set_stack_value (ctx, value = stack_push (ctx), mono_type_get_type_byref (type), FALSE);
3504 value->stype |= CMMP_MASK;
3508 do_unbox_any (VerifyContext *ctx, int klass_token)
3511 MonoType *type = get_boxable_mono_type (ctx, klass_token, "unbox.any");
3516 if (!check_underflow (ctx, 1))
3519 value = stack_pop (ctx);
3521 /*Value should be: a boxed valuetype or a reference type*/
3522 if (!(stack_slot_get_type (value) == TYPE_COMPLEX &&
3523 (stack_slot_is_boxed_value (value) || !mono_class_from_mono_type (value->type)->valuetype)))
3524 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));
3526 set_stack_value (ctx, stack_push (ctx), type, FALSE);
3530 do_unary_math_op (VerifyContext *ctx, int op)
3533 if (!check_underflow (ctx, 1))
3535 value = stack_pop (ctx);
3536 switch (stack_slot_get_type (value)) {
3539 case TYPE_NATIVE_INT:
3544 case TYPE_COMPLEX: /*only enums are ok*/
3545 if (mono_type_is_enum_type (value->type))
3548 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for unary not at 0x%04x", ctx->ip_offset));
3550 stack_push_stack_val (ctx, value);
3554 do_conversion (VerifyContext *ctx, int kind)
3557 if (!check_underflow (ctx, 1))
3559 value = stack_pop (ctx);
3561 switch (stack_slot_get_type (value)) {
3564 case TYPE_NATIVE_INT:
3568 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));
3573 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3576 stack_push_val (ctx,TYPE_I8, &mono_defaults.int64_class->byval_arg);
3579 stack_push_val (ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
3581 case TYPE_NATIVE_INT:
3582 stack_push_val (ctx, TYPE_NATIVE_INT, &mono_defaults.int_class->byval_arg);
3585 g_error ("unknown type %02x in conversion", kind);
3591 do_load_token (VerifyContext *ctx, int token)
3594 MonoClass *handle_class;
3595 if (!check_overflow (ctx))
3598 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
3599 handle = mono_method_get_wrapper_data (ctx->method, token);
3600 handle_class = mono_method_get_wrapper_data (ctx->method, token + 1);
3601 if (handle_class == mono_defaults.typehandle_class)
3602 handle = &((MonoClass*)handle)->byval_arg;
3604 switch (token & 0xff000000) {
3605 case MONO_TOKEN_TYPE_DEF:
3606 case MONO_TOKEN_TYPE_REF:
3607 case MONO_TOKEN_TYPE_SPEC:
3608 case MONO_TOKEN_FIELD_DEF:
3609 case MONO_TOKEN_METHOD_DEF:
3610 case MONO_TOKEN_METHOD_SPEC:
3611 case MONO_TOKEN_MEMBER_REF:
3612 if (!token_bounds_check (ctx->image, token)) {
3613 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));
3618 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));
3622 handle = mono_ldtoken (ctx->image, token, &handle_class, ctx->generic_context);
3626 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid token 0x%x for ldtoken at 0x%04x", token, ctx->ip_offset));
3629 if (handle_class == mono_defaults.typehandle_class) {
3630 mono_type_is_valid_in_context (ctx, (MonoType*)handle);
3631 } else if (handle_class == mono_defaults.methodhandle_class) {
3632 mono_method_is_valid_in_context (ctx, (MonoMethod*)handle);
3633 } else if (handle_class == mono_defaults.fieldhandle_class) {
3634 mono_type_is_valid_in_context (ctx, &((MonoClassField*)handle)->parent->byval_arg);
3636 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid ldtoken type %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
3638 stack_push_val (ctx, TYPE_COMPLEX, mono_class_get_type (handle_class));
3642 do_ldobj_value (VerifyContext *ctx, int token)
3645 MonoType *type = get_boxable_mono_type (ctx, token, "ldobj");
3646 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3651 if (!check_underflow (ctx, 1))
3654 value = stack_pop (ctx);
3655 if (!stack_slot_is_managed_pointer (value)
3656 && stack_slot_get_type (value) != TYPE_NATIVE_INT
3657 && !(stack_slot_get_type (value) == TYPE_PTR && value->type->type != MONO_TYPE_FNPTR)) {
3658 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid argument %s to ldobj at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3662 if (stack_slot_get_type (value) == TYPE_NATIVE_INT)
3663 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Using native pointer to ldobj at 0x%04x", ctx->ip_offset));
3665 /*We have a byval on the stack, but the comparison must be strict. */
3666 if (!verify_type_compatibility_full (ctx, type, mono_type_get_type_byval (value->type), TRUE))
3667 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldojb operation at 0x%04x", ctx->ip_offset));
3669 set_stack_value (ctx, stack_push (ctx), type, FALSE);
3673 do_stobj (VerifyContext *ctx, int token)
3675 ILStackDesc *dest, *src;
3676 MonoType *type = get_boxable_mono_type (ctx, token, "stobj");
3677 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3682 if (!check_underflow (ctx, 2))
3685 src = stack_pop (ctx);
3686 dest = stack_pop (ctx);
3688 if (stack_slot_is_managed_mutability_pointer (dest))
3689 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with stobj at 0x%04x", ctx->ip_offset));
3691 if (!stack_slot_is_managed_pointer (dest))
3692 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid destination of stobj operation at 0x%04x", ctx->ip_offset));
3694 if (stack_slot_is_boxed_value (src) && !MONO_TYPE_IS_REFERENCE (src->type) && !MONO_TYPE_IS_REFERENCE (type))
3695 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));
3697 if (!verify_stack_type_compatibility (ctx, type, src)) {
3698 char *type_name = mono_type_full_name (type);
3699 char *src_name = stack_slot_full_name (src);
3700 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));
3705 if (!verify_type_compatibility (ctx, mono_type_get_type_byval (dest->type), type))
3706 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Destination and token types of stobj don't match at 0x%04x", ctx->ip_offset));
3710 do_cpobj (VerifyContext *ctx, int token)
3712 ILStackDesc *dest, *src;
3713 MonoType *type = get_boxable_mono_type (ctx, token, "cpobj");
3717 if (!check_underflow (ctx, 2))
3720 src = stack_pop (ctx);
3721 dest = stack_pop (ctx);
3723 if (!stack_slot_is_managed_pointer (src))
3724 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid source of cpobj operation at 0x%04x", ctx->ip_offset));
3726 if (!stack_slot_is_managed_pointer (dest))
3727 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid destination of cpobj operation at 0x%04x", ctx->ip_offset));
3729 if (stack_slot_is_managed_mutability_pointer (dest))
3730 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with cpobj at 0x%04x", ctx->ip_offset));
3732 if (!verify_type_compatibility (ctx, type, mono_type_get_type_byval (src->type)))
3733 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Token and source types of cpobj don't match at 0x%04x", ctx->ip_offset));
3735 if (!verify_type_compatibility (ctx, mono_type_get_type_byval (dest->type), type))
3736 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Destination and token types of cpobj don't match at 0x%04x", ctx->ip_offset));
3740 do_initobj (VerifyContext *ctx, int token)
3743 MonoType *stack, *type = get_boxable_mono_type (ctx, token, "initobj");
3747 if (!check_underflow (ctx, 1))
3750 obj = stack_pop (ctx);
3752 if (!stack_slot_is_managed_pointer (obj))
3753 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid object address for initobj at 0x%04x", ctx->ip_offset));
3755 if (stack_slot_is_managed_mutability_pointer (obj))
3756 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with initobj at 0x%04x", ctx->ip_offset));
3758 stack = mono_type_get_type_byval (obj->type);
3759 if (MONO_TYPE_IS_REFERENCE (stack)) {
3760 if (!verify_type_compatibility (ctx, stack, type))
3761 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type token of initobj not compatible with value on stack at 0x%04x", ctx->ip_offset));
3762 else if (IS_STRICT_MODE (ctx) && !mono_metadata_type_equal (type, stack))
3763 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type token of initobj not compatible with value on stack at 0x%04x", ctx->ip_offset));
3764 } else if (!verify_type_compatibility (ctx, stack, type)) {
3765 char *expected_name = mono_type_full_name (type);
3766 char *stack_name = mono_type_full_name (stack);
3768 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));
3769 g_free (expected_name);
3770 g_free (stack_name);
3775 do_newobj (VerifyContext *ctx, int token)
3779 MonoMethodSignature *sig;
3781 gboolean is_delegate = FALSE;
3783 if (!(method = verifier_load_method (ctx, token, "newobj")))
3786 if (!mono_method_is_constructor (method)) {
3787 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method from token 0x%08x not a constructor at 0x%04x", token, ctx->ip_offset));
3791 if (method->klass->flags & (TYPE_ATTRIBUTE_ABSTRACT | TYPE_ATTRIBUTE_INTERFACE))
3792 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Trying to instantiate an abstract or interface type at 0x%04x", ctx->ip_offset));
3794 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, NULL)) {
3795 char *from = mono_method_full_name (ctx->method, TRUE);
3796 char *to = mono_method_full_name (method, TRUE);
3797 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);
3802 //FIXME use mono_method_get_signature_full
3803 sig = mono_method_signature (method);
3805 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid constructor signature to newobj at 0x%04x", ctx->ip_offset));
3809 if (!sig->hasthis) {
3810 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid constructor signature missing hasthis at 0x%04x", ctx->ip_offset));
3814 if (!check_underflow (ctx, sig->param_count))
3817 is_delegate = method->klass->parent == mono_defaults.multicastdelegate_class;
3820 ILStackDesc *funptr;
3821 //first arg is object, second arg is fun ptr
3822 if (sig->param_count != 2) {
3823 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid delegate constructor at 0x%04x", ctx->ip_offset));
3826 funptr = stack_pop (ctx);
3827 value = stack_pop (ctx);
3828 verify_delegate_compatibility (ctx, method->klass, value, funptr);
3830 for (i = sig->param_count - 1; i >= 0; --i) {
3831 VERIFIER_DEBUG ( printf ("verifying constructor argument %d\n", i); );
3832 value = stack_pop (ctx);
3833 if (!verify_stack_type_compatibility (ctx, sig->params [i], value)) {
3834 char *stack_name = stack_slot_full_name (value);
3835 char *sig_name = mono_type_full_name (sig->params [i]);
3836 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));
3837 g_free (stack_name);
3841 if (stack_slot_is_managed_mutability_pointer (value))
3842 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer as argument of newobj at 0x%04x", ctx->ip_offset));
3846 if (check_overflow (ctx))
3847 set_stack_value (ctx, stack_push (ctx), &method->klass->byval_arg, FALSE);
3851 do_cast (VerifyContext *ctx, int token, const char *opcode) {
3857 if (!check_underflow (ctx, 1))
3860 if (!(type = get_boxable_mono_type (ctx, token, opcode)))
3864 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid %s type at 0x%04x", opcode, ctx->ip_offset));
3868 value = stack_pop (ctx);
3869 is_boxed = stack_slot_is_boxed_value (value);
3871 if (stack_slot_is_managed_pointer (value))
3872 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value for %s at 0x%04x", opcode, ctx->ip_offset));
3873 else if (!MONO_TYPE_IS_REFERENCE (value->type) && !is_boxed) {
3874 char *name = stack_slot_full_name (value);
3875 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));
3879 switch (value->type->type) {
3880 case MONO_TYPE_FNPTR:
3882 case MONO_TYPE_TYPEDBYREF:
3883 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value for %s at 0x%04x", opcode, ctx->ip_offset));
3886 do_box = is_boxed || mono_type_is_generic_argument(type) || mono_class_from_mono_type (type)->valuetype;
3887 stack_push_val (ctx, TYPE_COMPLEX | (do_box ? BOXED_MASK : 0), type);
3891 mono_type_from_opcode (int opcode) {
3899 return &mono_defaults.sbyte_class->byval_arg;
3907 return &mono_defaults.int16_class->byval_arg;
3915 return &mono_defaults.int32_class->byval_arg;
3921 return &mono_defaults.int64_class->byval_arg;
3927 return &mono_defaults.single_class->byval_arg;
3933 return &mono_defaults.double_class->byval_arg;
3939 return &mono_defaults.int_class->byval_arg;
3943 case CEE_LDELEM_REF:
3944 case CEE_STELEM_REF:
3945 return &mono_defaults.object_class->byval_arg;
3948 g_error ("unknown opcode %02x in mono_type_from_opcode ", opcode);
3954 do_load_indirect (VerifyContext *ctx, int opcode)
3957 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3959 if (!check_underflow (ctx, 1))
3962 value = stack_pop (ctx);
3963 if (!stack_slot_is_managed_pointer (value)) {
3964 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Load indirect not using a manager pointer at 0x%04x", ctx->ip_offset));
3965 set_stack_value (ctx, stack_push (ctx), mono_type_from_opcode (opcode), FALSE);
3969 if (opcode == CEE_LDIND_REF) {
3970 if (stack_slot_get_underlying_type (value) != TYPE_COMPLEX || mono_class_from_mono_type (value->type)->valuetype)
3971 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldind_ref expected object byref operation at 0x%04x", ctx->ip_offset));
3972 set_stack_value (ctx, stack_push (ctx), mono_type_get_type_byval (value->type), FALSE);
3974 if (!verify_type_compatibility_full (ctx, mono_type_from_opcode (opcode), mono_type_get_type_byval (value->type), TRUE))
3975 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
3976 set_stack_value (ctx, stack_push (ctx), mono_type_from_opcode (opcode), FALSE);
3981 do_store_indirect (VerifyContext *ctx, int opcode)
3983 ILStackDesc *addr, *val;
3984 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3986 if (!check_underflow (ctx, 2))
3989 val = stack_pop (ctx);
3990 addr = stack_pop (ctx);
3992 check_unmanaged_pointer (ctx, addr);
3994 if (!stack_slot_is_managed_pointer (addr) && stack_slot_get_type (addr) != TYPE_PTR) {
3995 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid non-pointer argument to stind at 0x%04x", ctx->ip_offset));
3999 if (stack_slot_is_managed_mutability_pointer (addr)) {
4000 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with stind at 0x%04x", ctx->ip_offset));
4004 if (!verify_type_compatibility_full (ctx, mono_type_from_opcode (opcode), mono_type_get_type_byval (addr->type), TRUE))
4005 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid addr type at stack for stind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
4007 if (!verify_stack_type_compatibility (ctx, mono_type_from_opcode (opcode), val))
4008 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value type at stack for stind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
4012 do_newarr (VerifyContext *ctx, int token)
4015 MonoType *type = get_boxable_mono_type (ctx, token, "newarr");
4020 if (!check_underflow (ctx, 1))
4023 value = stack_pop (ctx);
4024 if (stack_slot_get_type (value) != TYPE_I4 && stack_slot_get_type (value) != TYPE_NATIVE_INT)
4025 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));
4027 set_stack_value (ctx, stack_push (ctx), mono_class_get_type (mono_array_class_get (mono_class_from_mono_type (type), 1)), FALSE);
4030 /*FIXME handle arrays that are not 0-indexed*/
4032 do_ldlen (VerifyContext *ctx)
4036 if (!check_underflow (ctx, 1))
4039 value = stack_pop (ctx);
4041 if (stack_slot_get_type (value) != TYPE_COMPLEX || value->type->type != MONO_TYPE_SZARRAY)
4042 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type for ldlen at 0x%04x", ctx->ip_offset));
4044 stack_push_val (ctx, TYPE_NATIVE_INT, &mono_defaults.int_class->byval_arg);
4047 /*FIXME handle arrays that are not 0-indexed*/
4048 /*FIXME handle readonly prefix and CMMP*/
4050 do_ldelema (VerifyContext *ctx, int klass_token)
4052 ILStackDesc *index, *array, *res;
4053 MonoType *type = get_boxable_mono_type (ctx, klass_token, "ldelema");
4059 if (!check_underflow (ctx, 2))
4062 index = stack_pop (ctx);
4063 array = stack_pop (ctx);
4065 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4066 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));
4068 if (!stack_slot_is_null_literal (array)) {
4069 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY)
4070 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type(%s) for ldelema at 0x%04x", stack_slot_get_name (array), ctx->ip_offset));
4072 if (get_stack_type (type) == TYPE_I4 || get_stack_type (type) == TYPE_NATIVE_INT) {
4073 valid = verify_type_compatibility_full (ctx, type, &array->type->data.klass->byval_arg, TRUE);
4075 valid = mono_metadata_type_equal (type, &array->type->data.klass->byval_arg);
4078 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelema at 0x%04x", ctx->ip_offset));
4082 res = stack_push (ctx);
4083 set_stack_value (ctx, res, type, TRUE);
4084 if (ctx->prefix_set & PREFIX_READONLY) {
4085 ctx->prefix_set &= ~PREFIX_READONLY;
4086 res->stype |= CMMP_MASK;
4091 * FIXME handle arrays that are not 0-indexed
4092 * FIXME handle readonly prefix and CMMP
4095 do_ldelem (VerifyContext *ctx, int opcode, int token)
4097 #define IS_ONE_OF2(T, A, B) (T == A || T == B)
4098 ILStackDesc *index, *array;
4100 if (!check_underflow (ctx, 2))
4103 if (opcode == CEE_LDELEM) {
4104 if (!(type = verifier_load_type (ctx, token, "ldelem.any"))) {
4105 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Type (0x%08x) not found at 0x%04x", token, ctx->ip_offset));
4109 type = mono_type_from_opcode (opcode);
4112 index = stack_pop (ctx);
4113 array = stack_pop (ctx);
4115 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4116 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));
4118 if (!stack_slot_is_null_literal (array)) {
4119 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY)
4120 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));
4122 if (opcode == CEE_LDELEM_REF) {
4123 if (array->type->data.klass->valuetype)
4124 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type is not a reference type for ldelem.ref 0x%04x", ctx->ip_offset));
4125 type = &array->type->data.klass->byval_arg;
4127 MonoType *candidate = &array->type->data.klass->byval_arg;
4128 if (IS_STRICT_MODE (ctx)) {
4129 MonoType *underlying_type = mono_type_get_underlying_type_any (type);
4130 MonoType *underlying_candidate = mono_type_get_underlying_type_any (candidate);
4131 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)) ||
4132 (IS_ONE_OF2 (underlying_candidate->type, MONO_TYPE_I4, MONO_TYPE_U4) && IS_ONE_OF2 (underlying_type->type, MONO_TYPE_I, MONO_TYPE_U)))
4133 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelem.X at 0x%04x", ctx->ip_offset));
4135 if (!verify_type_compatibility_full (ctx, type, candidate, TRUE))
4136 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelem.X at 0x%04x", ctx->ip_offset));
4141 set_stack_value (ctx, stack_push (ctx), type, FALSE);
4146 * FIXME handle arrays that are not 0-indexed
4149 do_stelem (VerifyContext *ctx, int opcode, int token)
4151 ILStackDesc *index, *array, *value;
4153 if (!check_underflow (ctx, 3))
4156 if (opcode == CEE_STELEM) {
4157 if (!(type = verifier_load_type (ctx, token, "stelem.any"))) {
4158 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Type (0x%08x) not found at 0x%04x", token, ctx->ip_offset));
4162 type = mono_type_from_opcode (opcode);
4165 value = stack_pop (ctx);
4166 index = stack_pop (ctx);
4167 array = stack_pop (ctx);
4169 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4170 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));
4172 if (!stack_slot_is_null_literal (array)) {
4173 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY) {
4174 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));
4176 if (opcode == CEE_STELEM_REF) {
4177 if (array->type->data.klass->valuetype)
4178 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type is not a reference type for stelem.ref 0x%04x", ctx->ip_offset));
4179 } else if (!verify_type_compatibility_full (ctx, &array->type->data.klass->byval_arg, type, TRUE)) {
4180 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for stdelem.X at 0x%04x", ctx->ip_offset));
4184 if (opcode == CEE_STELEM_REF) {
4185 if (!stack_slot_is_boxed_value (value) && mono_class_from_mono_type (value->type)->valuetype)
4186 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value is not a reference type for stelem.ref 0x%04x", ctx->ip_offset));
4187 } else if (opcode != CEE_STELEM_REF) {
4188 if (!verify_stack_type_compatibility (ctx, type, value))
4189 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value on stack for stdelem.X at 0x%04x", ctx->ip_offset));
4191 if (stack_slot_is_boxed_value (value) && !MONO_TYPE_IS_REFERENCE (value->type) && !MONO_TYPE_IS_REFERENCE (type))
4192 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));
4198 do_throw (VerifyContext *ctx)
4200 ILStackDesc *exception;
4201 if (!check_underflow (ctx, 1))
4203 exception = stack_pop (ctx);
4205 if (!stack_slot_is_null_literal (exception) && !(stack_slot_get_type (exception) == TYPE_COMPLEX && !mono_class_from_mono_type (exception->type)->valuetype))
4206 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type on stack for throw, expected reference type at 0x%04x", ctx->ip_offset));
4208 if (mono_type_is_generic_argument (exception->type) && !stack_slot_is_boxed_value (exception)) {
4209 char *name = mono_type_full_name (exception->type);
4210 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));
4213 /*The stack is left empty after a throw*/
4219 do_endfilter (VerifyContext *ctx)
4221 MonoExceptionClause *clause;
4223 if (IS_STRICT_MODE (ctx)) {
4224 if (ctx->eval.size != 1)
4225 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack size must have one item for endfilter at 0x%04x", ctx->ip_offset));
4227 if (ctx->eval.size >= 1 && stack_slot_get_type (stack_pop (ctx)) != TYPE_I4)
4228 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack item type is not an int32 for endfilter at 0x%04x", ctx->ip_offset));
4231 if ((clause = is_correct_endfilter (ctx, ctx->ip_offset))) {
4232 if (IS_STRICT_MODE (ctx)) {
4233 if (ctx->ip_offset != clause->handler_offset - 2)
4234 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter is not the last instruction of the filter clause at 0x%04x", ctx->ip_offset));
4236 if ((ctx->ip_offset != clause->handler_offset - 2) && !MONO_OFFSET_IN_HANDLER (clause, ctx->ip_offset))
4237 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter is not the last instruction of the filter clause at 0x%04x", ctx->ip_offset));
4240 if (IS_STRICT_MODE (ctx) && !is_unverifiable_endfilter (ctx, ctx->ip_offset))
4241 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter outside filter clause at 0x%04x", ctx->ip_offset));
4243 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("endfilter outside filter clause at 0x%04x", ctx->ip_offset));
4250 do_leave (VerifyContext *ctx, int delta)
4252 int target = ((gint32)ctx->ip_offset) + delta;
4253 if (target >= ctx->code_size || target < 0)
4254 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target out of code at 0x%04x", ctx->ip_offset));
4256 if (!is_correct_leave (ctx->header, ctx->ip_offset, target))
4257 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Leave not allowed in finally block at 0x%04x", ctx->ip_offset));
4259 ctx->target = target;
4265 * Verify br and br.s opcodes.
4268 do_static_branch (VerifyContext *ctx, int delta)
4270 int target = ctx->ip_offset + delta;
4271 if (target < 0 || target >= ctx->code_size) {
4272 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("branch target out of code at 0x%04x", ctx->ip_offset));
4276 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
4278 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
4281 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
4285 ctx->target = target;
4289 do_switch (VerifyContext *ctx, int count, const unsigned char *data)
4291 int i, base = ctx->ip_offset + 5 + count * 4;
4294 if (!check_underflow (ctx, 1))
4297 value = stack_pop (ctx);
4299 if (stack_slot_get_type (value) != TYPE_I4 && stack_slot_get_type (value) != TYPE_NATIVE_INT)
4300 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid argument to switch at 0x%04x", ctx->ip_offset));
4302 for (i = 0; i < count; ++i) {
4303 int target = base + read32 (data + i * 4);
4305 if (target < 0 || target >= ctx->code_size) {
4306 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Switch target %x out of code at 0x%04x", i, ctx->ip_offset));
4310 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
4312 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Switch target %x escapes out of exception block at 0x%04x", i, ctx->ip_offset));
4315 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Switch target %x escapes out of exception block at 0x%04x", i, ctx->ip_offset));
4318 merge_stacks (ctx, &ctx->eval, &ctx->code [target], FALSE, TRUE);
4323 do_load_function_ptr (VerifyContext *ctx, guint32 token, gboolean virtual)
4328 if (virtual && !check_underflow (ctx, 1))
4331 if (!virtual && !check_overflow (ctx))
4334 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
4335 method = mono_method_get_wrapper_data (ctx->method, (guint32)token);
4337 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid token %x for ldftn at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4341 if (!IS_METHOD_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
4342 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid token %x for ldftn at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4346 if (!(method = verifier_load_method (ctx, token, virtual ? "ldvirtfrn" : "ldftn")))
4350 if (mono_method_is_constructor (method))
4351 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use ldftn with a constructor at 0x%04x", ctx->ip_offset));
4354 ILStackDesc *top = stack_pop (ctx);
4356 if (stack_slot_get_type (top) != TYPE_COMPLEX || top->type->type == MONO_TYPE_VALUETYPE)
4357 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid argument to ldvirtftn at 0x%04x", ctx->ip_offset));
4359 if (method->flags & METHOD_ATTRIBUTE_STATIC)
4360 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use ldvirtftn with a constructor at 0x%04x", ctx->ip_offset));
4362 if (!verify_stack_type_compatibility (ctx, &method->klass->byval_arg, top))
4363 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unexpected object for ldvirtftn at 0x%04x", ctx->ip_offset));
4366 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, NULL))
4367 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);
4369 top = stack_push_val(ctx, TYPE_PTR, mono_type_create_fnptr_from_mono_method (ctx, method));
4370 top->method = method;
4374 do_sizeof (VerifyContext *ctx, int token)
4378 if (!(type = verifier_load_type (ctx, token, "sizeof")))
4381 if (type->byref && type->type != MONO_TYPE_TYPEDBYREF) {
4382 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of byref type at 0x%04x", ctx->ip_offset));
4386 if (type->type == MONO_TYPE_VOID) {
4387 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of void type at 0x%04x", ctx->ip_offset));
4391 if (check_overflow (ctx))
4392 set_stack_value (ctx, stack_push (ctx), &mono_defaults.uint32_class->byval_arg, FALSE);
4395 /* Stack top can be of any type, the runtime doesn't care and treat everything as an int. */
4397 do_localloc (VerifyContext *ctx)
4401 if (ctx->eval.size != 1) {
4402 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack must have only size item in localloc at 0x%04x", ctx->ip_offset));
4406 if (in_any_exception_block (ctx->header, ctx->ip_offset)) {
4407 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack must have only size item in localloc at 0x%04x", ctx->ip_offset));
4411 /*TODO verify top type*/
4412 top = stack_pop (ctx);
4414 set_stack_value (ctx, stack_push (ctx), &mono_defaults.int_class->byval_arg, FALSE);
4415 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Instruction localloc in never verifiable at 0x%04x", ctx->ip_offset));
4419 do_ldstr (VerifyContext *ctx, guint32 token)
4421 GSList *error = NULL;
4422 if (ctx->method->wrapper_type == MONO_WRAPPER_NONE && !ctx->image->dynamic) {
4423 if (mono_metadata_token_code (token) != MONO_TOKEN_STRING) {
4424 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid string token %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4428 if (!mono_verifier_verify_string_signature (ctx->image, mono_metadata_token_index (token), &error)) {
4430 ctx->list = g_slist_concat (ctx->list, error);
4431 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid string index %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4436 if (check_overflow (ctx))
4437 stack_push_val (ctx, TYPE_COMPLEX, &mono_defaults.string_class->byval_arg);
4441 do_refanyval (VerifyContext *ctx, int token)
4445 if (!check_underflow (ctx, 1))
4448 if (!(type = get_boxable_mono_type (ctx, token, "refanyval")))
4451 top = stack_pop (ctx);
4453 if (top->stype != TYPE_PTR || top->type->type != MONO_TYPE_TYPEDBYREF)
4454 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));
4456 set_stack_value (ctx, stack_push (ctx), type, TRUE);
4460 do_refanytype (VerifyContext *ctx)
4464 if (!check_underflow (ctx, 1))
4467 top = stack_pop (ctx);
4469 if (top->stype != TYPE_PTR || top->type->type != MONO_TYPE_TYPEDBYREF)
4470 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));
4472 set_stack_value (ctx, stack_push (ctx), &mono_defaults.typehandle_class->byval_arg, FALSE);
4477 do_mkrefany (VerifyContext *ctx, int token)
4481 if (!check_underflow (ctx, 1))
4484 if (!(type = get_boxable_mono_type (ctx, token, "refanyval")))
4487 top = stack_pop (ctx);
4489 if (stack_slot_is_managed_mutability_pointer (top))
4490 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with mkrefany at 0x%04x", ctx->ip_offset));
4492 if (!stack_slot_is_managed_pointer (top)) {
4493 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));
4495 MonoType *stack_type = mono_type_get_type_byval (top->type);
4496 if (MONO_TYPE_IS_REFERENCE (type) && !mono_metadata_type_equal (type, stack_type))
4497 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type not compatible for mkrefany at 0x%04x", ctx->ip_offset));
4499 if (!MONO_TYPE_IS_REFERENCE (type) && !verify_type_compatibility_full (ctx, type, stack_type, TRUE))
4500 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type not compatible for mkrefany at 0x%04x", ctx->ip_offset));
4503 set_stack_value (ctx, stack_push (ctx), &mono_defaults.typed_reference_class->byval_arg, FALSE);
4507 do_ckfinite (VerifyContext *ctx)
4510 if (!check_underflow (ctx, 1))
4513 top = stack_pop (ctx);
4515 if (stack_slot_get_underlying_type (top) != TYPE_R8)
4516 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));
4517 stack_push_stack_val (ctx, top);
4521 * Merge the stacks and perform compat checks. The merge check if types of @from are mergeable with type of @to
4523 * @from holds new values for a given control path
4524 * @to holds the current values of a given control path
4526 * TODO we can eliminate the from argument as all callers pass &ctx->eval
4529 merge_stacks (VerifyContext *ctx, ILCodeDesc *from, ILCodeDesc *to, gboolean start, gboolean external)
4533 stack_init (ctx, to);
4536 if (to->flags == IL_CODE_FLAG_NOT_PROCESSED)
4539 stack_copy (&ctx->eval, to);
4541 } else if (!(to->flags & IL_CODE_STACK_MERGED)) {
4542 stack_copy (to, &ctx->eval);
4545 VERIFIER_DEBUG ( printf ("performing stack merge %d x %d\n", from->size, to->size); );
4547 if (from->size != to->size) {
4548 VERIFIER_DEBUG ( printf ("different stack sizes %d x %d at 0x%04x\n", from->size, to->size, ctx->ip_offset); );
4549 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));
4553 //FIXME we need to preserve CMMP attributes
4554 //FIXME we must take null literals into consideration.
4555 for (i = 0; i < from->size; ++i) {
4556 ILStackDesc *new_slot = from->stack + i;
4557 ILStackDesc *old_slot = to->stack + i;
4558 MonoType *new_type = mono_type_from_stack_slot (new_slot);
4559 MonoType *old_type = mono_type_from_stack_slot (old_slot);
4560 MonoClass *old_class = mono_class_from_mono_type (old_type);
4561 MonoClass *new_class = mono_class_from_mono_type (new_type);
4562 MonoClass *match_class = NULL;
4564 // S := T then U = S (new value is compatible with current value, keep current)
4565 if (verify_stack_type_compatibility (ctx, old_type, new_slot)) {
4566 copy_stack_value (new_slot, old_slot);
4570 // T := S then U = T (old value is compatible with current value, use new)
4571 if (verify_stack_type_compatibility (ctx, new_type, old_slot)) {
4572 copy_stack_value (old_slot, new_slot);
4576 /*Both slots are the same boxed valuetype. Simply copy it.*/
4577 if (stack_slot_is_boxed_value (old_slot) &&
4578 stack_slot_is_boxed_value (new_slot) &&
4579 mono_metadata_type_equal (old_type, new_type)) {
4580 copy_stack_value (new_slot, old_slot);
4584 if (mono_type_is_generic_argument (old_type) || mono_type_is_generic_argument (new_type)) {
4585 char *old_name = stack_slot_full_name (old_slot);
4586 char *new_name = stack_slot_full_name (new_slot);
4587 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));
4593 //both are reference types, use closest common super type
4594 if (!mono_class_from_mono_type (old_type)->valuetype
4595 && !mono_class_from_mono_type (new_type)->valuetype
4596 && !stack_slot_is_managed_pointer (old_slot)
4597 && !stack_slot_is_managed_pointer (new_slot)) {
4599 mono_class_setup_supertypes (old_class);
4600 mono_class_setup_supertypes (new_class);
4602 for (j = MIN (old_class->idepth, new_class->idepth) - 1; j > 0; --j) {
4603 if (mono_metadata_type_equal (&old_class->supertypes [j]->byval_arg, &new_class->supertypes [j]->byval_arg)) {
4604 match_class = old_class->supertypes [j];
4609 mono_class_setup_interfaces (old_class, &error);
4610 if (!mono_error_ok (&error)) {
4611 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));
4612 mono_error_cleanup (&error);
4615 mono_class_setup_interfaces (new_class, &error);
4616 if (!mono_error_ok (&error)) {
4617 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));
4618 mono_error_cleanup (&error);
4622 /* if old class is an interface that new class implements */
4623 if (old_class->flags & TYPE_ATTRIBUTE_INTERFACE) {
4624 if (verifier_class_is_assignable_from (old_class, new_class)) {
4625 match_class = old_class;
4628 for (j = 0; j < old_class->interface_count; ++j) {
4629 if (verifier_class_is_assignable_from (old_class->interfaces [j], new_class)) {
4630 match_class = old_class->interfaces [j];
4636 if (new_class->flags & TYPE_ATTRIBUTE_INTERFACE) {
4637 if (verifier_class_is_assignable_from (new_class, old_class)) {
4638 match_class = new_class;
4641 for (j = 0; j < new_class->interface_count; ++j) {
4642 if (verifier_class_is_assignable_from (new_class->interfaces [j], old_class)) {
4643 match_class = new_class->interfaces [j];
4649 //No decent super type found, use object
4650 match_class = mono_defaults.object_class;
4652 } 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)) {
4653 match_class = mono_defaults.object_class;
4658 char *old_name = stack_slot_full_name (old_slot);
4659 char *new_name = stack_slot_full_name (new_slot);
4660 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));
4664 set_stack_value (ctx, old_slot, &new_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4668 g_assert (match_class);
4669 set_stack_value (ctx, old_slot, &match_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4670 set_stack_value (ctx, new_slot, &match_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4676 to->flags |= IL_CODE_FLAG_WAS_TARGET;
4677 to->flags |= IL_CODE_STACK_MERGED;
4680 #define HANDLER_START(clause) ((clause)->flags == MONO_EXCEPTION_CLAUSE_FILTER ? (clause)->data.filter_offset : clause->handler_offset)
4681 #define IS_CATCH_OR_FILTER(clause) ((clause)->flags == MONO_EXCEPTION_CLAUSE_FILTER || (clause)->flags == MONO_EXCEPTION_CLAUSE_NONE)
4684 * is_clause_in_range :
4686 * Returns TRUE if either the protected block or the handler of @clause is in the @start - @end range.
4689 is_clause_in_range (MonoExceptionClause *clause, guint32 start, guint32 end)
4691 if (clause->try_offset >= start && clause->try_offset < end)
4693 if (HANDLER_START (clause) >= start && HANDLER_START (clause) < end)
4699 * is_clause_inside_range :
4701 * Returns TRUE if @clause lies completely inside the @start - @end range.
4704 is_clause_inside_range (MonoExceptionClause *clause, guint32 start, guint32 end)
4706 if (clause->try_offset < start || (clause->try_offset + clause->try_len) > end)
4708 if (HANDLER_START (clause) < start || (clause->handler_offset + clause->handler_len) > end)
4714 * is_clause_nested :
4716 * Returns TRUE if @nested is nested in @clause.
4719 is_clause_nested (MonoExceptionClause *clause, MonoExceptionClause *nested)
4721 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER && is_clause_inside_range (nested, clause->data.filter_offset, clause->handler_offset))
4723 return is_clause_inside_range (nested, clause->try_offset, clause->try_offset + clause->try_len) ||
4724 is_clause_inside_range (nested, clause->handler_offset, clause->handler_offset + clause->handler_len);
4727 /* Test the relationship between 2 exception clauses. Follow P.1 12.4.2.7 of ECMA
4728 * the each pair of exception must have the following properties:
4729 * - one is fully nested on another (the outer must not be a filter clause) (the nested one must come earlier)
4730 * - completely disjoin (none of the 3 regions of each entry overlap with the other 3)
4731 * - mutual protection (protected block is EXACT the same, handlers are disjoin and all handler are catch or all handler are filter)
4734 verify_clause_relationship (VerifyContext *ctx, MonoExceptionClause *clause, MonoExceptionClause *to_test)
4736 /*clause is nested*/
4737 if (to_test->flags == MONO_EXCEPTION_CLAUSE_FILTER && is_clause_inside_range (clause, to_test->data.filter_offset, to_test->handler_offset)) {
4738 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clause inside filter"));
4742 /*wrong nesting order.*/
4743 if (is_clause_nested (clause, to_test)) {
4744 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Nested exception clause appears after enclosing clause"));
4748 /*mutual protection*/
4749 if (clause->try_offset == to_test->try_offset && clause->try_len == to_test->try_len) {
4750 /*handlers are not disjoint*/
4751 if (is_clause_in_range (to_test, HANDLER_START (clause), clause->handler_offset + clause->handler_len)) {
4752 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception handlers overlap"));
4755 /* handlers are not catch or filter */
4756 if (!IS_CATCH_OR_FILTER (clause) || !IS_CATCH_OR_FILTER (to_test)) {
4757 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clauses with shared protected block are neither catch or filter"));
4764 /*not completelly disjoint*/
4765 if ((is_clause_in_range (to_test, clause->try_offset, clause->try_offset + clause->try_len) ||
4766 is_clause_in_range (to_test, HANDLER_START (clause), clause->handler_offset + clause->handler_len)) && !is_clause_nested (to_test, clause))
4767 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clauses overlap"));
4770 #define code_bounds_check(size) \
4771 if (ADDP_IS_GREATER_OR_OVF (ip, size, end)) {\
4772 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Code overrun starting with 0x%x at 0x%04x", *ip, ctx.ip_offset)); \
4777 mono_opcode_is_prefix (int op)
4780 case MONO_CEE_UNALIGNED_:
4781 case MONO_CEE_VOLATILE_:
4782 case MONO_CEE_TAIL_:
4783 case MONO_CEE_CONSTRAINED_:
4784 case MONO_CEE_READONLY_:
4791 * FIXME: need to distinguish between valid and verifiable.
4792 * Need to keep track of types on the stack.
4793 * Verify types for opcodes.
4796 mono_method_verify (MonoMethod *method, int level)
4799 const unsigned char *ip, *code_start;
4800 const unsigned char *end;
4801 MonoSimpleBasicBlock *bb = NULL, *original_bb = NULL;
4803 int i, n, need_merge = 0, start = 0;
4804 guint token, ip_offset = 0, prefix = 0;
4805 MonoGenericContext *generic_context = NULL;
4809 VERIFIER_DEBUG ( printf ("Verify IL for method %s %s %s\n", method->klass->name_space, method->klass->name, method->name); );
4811 init_verifier_stats ();
4813 if (method->iflags & (METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL | METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
4814 (method->flags & (METHOD_ATTRIBUTE_PINVOKE_IMPL | METHOD_ATTRIBUTE_ABSTRACT))) {
4818 memset (&ctx, 0, sizeof (VerifyContext));
4820 //FIXME use mono_method_get_signature_full
4821 ctx.signature = mono_method_signature (method);
4822 if (!ctx.signature) {
4823 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Could not decode method signature"));
4825 finish_collect_stats ();
4828 if (!method->is_generic && !method->klass->is_generic && ctx.signature->has_type_parameters) {
4829 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Method and signature don't match in terms of genericity"));
4830 finish_collect_stats ();
4834 ctx.header = mono_method_get_header (method);
4836 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Could not decode method header"));
4837 finish_collect_stats ();
4840 ctx.method = method;
4841 code_start = ip = ctx.header->code;
4842 end = ip + ctx.header->code_size;
4843 ctx.image = image = method->klass->image;
4846 ctx.max_args = ctx.signature->param_count + ctx.signature->hasthis;
4847 ctx.max_stack = ctx.header->max_stack;
4848 ctx.verifiable = ctx.valid = 1;
4851 ctx.code = g_new (ILCodeDesc, ctx.header->code_size);
4852 ctx.code_size = ctx.header->code_size;
4853 MEM_ALLOC (sizeof (ILCodeDesc) * ctx.header->code_size);
4855 memset(ctx.code, 0, sizeof (ILCodeDesc) * ctx.header->code_size);
4857 ctx.num_locals = ctx.header->num_locals;
4858 ctx.locals = g_memdup (ctx.header->locals, sizeof (MonoType*) * ctx.header->num_locals);
4859 MEM_ALLOC (sizeof (MonoType*) * ctx.header->num_locals);
4861 if (ctx.num_locals > 0 && !ctx.header->init_locals)
4862 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Method with locals variable but without init locals set"));
4864 ctx.params = g_new (MonoType*, ctx.max_args);
4865 MEM_ALLOC (sizeof (MonoType*) * ctx.max_args);
4867 if (ctx.signature->hasthis)
4868 ctx.params [0] = method->klass->valuetype ? &method->klass->this_arg : &method->klass->byval_arg;
4869 memcpy (ctx.params + ctx.signature->hasthis, ctx.signature->params, sizeof (MonoType *) * ctx.signature->param_count);
4871 if (ctx.signature->is_inflated)
4872 ctx.generic_context = generic_context = mono_method_get_context (method);
4874 if (!generic_context && (method->klass->generic_container || method->is_generic)) {
4875 if (method->is_generic)
4876 ctx.generic_context = generic_context = &(mono_method_get_generic_container (method)->context);
4878 ctx.generic_context = generic_context = &method->klass->generic_container->context;
4881 for (i = 0; i < ctx.num_locals; ++i) {
4882 MonoType *uninflated = ctx.locals [i];
4883 ctx.locals [i] = mono_class_inflate_generic_type_checked (ctx.locals [i], ctx.generic_context, &error);
4884 if (!mono_error_ok (&error)) {
4885 char *name = mono_type_full_name (ctx.locals [i] ? ctx.locals [i] : uninflated);
4886 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid local %d of type %s", i, name));
4888 mono_error_cleanup (&error);
4889 /* we must not free (in cleanup) what was not yet allocated (but only copied) */
4895 for (i = 0; i < ctx.max_args; ++i) {
4896 MonoType *uninflated = ctx.params [i];
4897 ctx.params [i] = mono_class_inflate_generic_type_checked (ctx.params [i], ctx.generic_context, &error);
4898 if (!mono_error_ok (&error)) {
4899 char *name = mono_type_full_name (ctx.params [i] ? ctx.params [i] : uninflated);
4900 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid parameter %d of type %s", i, name));
4902 mono_error_cleanup (&error);
4903 /* we must not free (in cleanup) what was not yet allocated (but only copied) */
4908 stack_init (&ctx, &ctx.eval);
4910 for (i = 0; i < ctx.num_locals; ++i) {
4911 if (!mono_type_is_valid_in_context (&ctx, ctx.locals [i]))
4913 if (get_stack_type (ctx.locals [i]) == TYPE_INV) {
4914 char *name = mono_type_full_name (ctx.locals [i]);
4915 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid local %i of type %s", i, name));
4922 for (i = 0; i < ctx.max_args; ++i) {
4923 if (!mono_type_is_valid_in_context (&ctx, ctx.params [i]))
4926 if (get_stack_type (ctx.params [i]) == TYPE_INV) {
4927 char *name = mono_type_full_name (ctx.params [i]);
4928 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid parameter %i of type %s", i, name));
4937 for (i = 0; i < ctx.header->num_clauses && ctx.valid; ++i) {
4938 MonoExceptionClause *clause = ctx.header->clauses + i;
4939 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); );
4941 if (clause->try_offset > ctx.code_size || ADD_IS_GREATER_OR_OVF (clause->try_offset, clause->try_len, ctx.code_size))
4942 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try clause out of bounds at 0x%04x", clause->try_offset));
4944 if (clause->try_len <= 0)
4945 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try clause len <= 0 at 0x%04x", clause->try_offset));
4947 if (clause->handler_offset > ctx.code_size || ADD_IS_GREATER_OR_OVF (clause->handler_offset, clause->handler_len, ctx.code_size))
4948 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("handler clause out of bounds at 0x%04x", clause->try_offset));
4950 if (clause->handler_len <= 0)
4951 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("handler clause len <= 0 at 0x%04x", clause->try_offset));
4953 if (clause->try_offset < clause->handler_offset && ADD_IS_GREATER_OR_OVF (clause->try_offset, clause->try_len, HANDLER_START (clause)))
4954 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try block (at 0x%04x) includes handler block (at 0x%04x)", clause->try_offset, clause->handler_offset));
4956 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
4957 if (clause->data.filter_offset > ctx.code_size)
4958 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("filter clause out of bounds at 0x%04x", clause->try_offset));
4960 if (clause->data.filter_offset >= clause->handler_offset)
4961 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("filter clause must come before the handler clause at 0x%04x", clause->data.filter_offset));
4964 for (n = i + 1; n < ctx.header->num_clauses && ctx.valid; ++n)
4965 verify_clause_relationship (&ctx, clause, ctx.header->clauses + n);
4970 ctx.code [clause->try_offset].flags |= IL_CODE_FLAG_WAS_TARGET;
4971 if (clause->try_offset + clause->try_len < ctx.code_size)
4972 ctx.code [clause->try_offset + clause->try_len].flags |= IL_CODE_FLAG_WAS_TARGET;
4973 if (clause->handler_offset + clause->handler_len < ctx.code_size)
4974 ctx.code [clause->handler_offset + clause->handler_len].flags |= IL_CODE_FLAG_WAS_TARGET;
4976 if (clause->flags == MONO_EXCEPTION_CLAUSE_NONE) {
4977 if (!clause->data.catch_class) {
4978 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Catch clause %d with invalid type", i));
4981 if (!mono_type_is_valid_in_context (&ctx, &clause->data.catch_class->byval_arg))
4984 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->handler_offset, clause->data.catch_class);
4986 else if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
4987 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->data.filter_offset, mono_defaults.exception_class);
4988 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->handler_offset, mono_defaults.exception_class);
4995 original_bb = bb = mono_basic_block_split (method, &error);
4996 if (!mono_error_ok (&error)) {
4997 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid branch target: %s", mono_error_get_message (&error)));
4998 mono_error_cleanup (&error);
5003 while (ip < end && ctx.valid) {
5005 ip_offset = ip - code_start;
5007 const unsigned char *ip_copy = ip;
5010 if (ip_offset > bb->end) {
5011 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or EH block at [0x%04x] targets middle instruction at 0x%04x", bb->end, ip_offset));
5015 if (ip_offset == bb->end)
5018 op_size = mono_opcode_value_and_size (&ip_copy, end, &op);
5019 if (op_size == -1) {
5020 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction %x at 0x%04x", *ip, ip_offset));
5024 if (ADD_IS_GREATER_OR_OVF (ip_offset, op_size, bb->end)) {
5025 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or EH block targets middle of instruction at 0x%04x", ip_offset));
5029 /*Last Instruction*/
5030 if (ip_offset + op_size == bb->end && mono_opcode_is_prefix (op)) {
5031 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));
5036 ctx.ip_offset = ip_offset = ip - code_start;
5038 /*We need to check against fallthrou in and out of protected blocks.
5039 * For fallout we check the once a protected block ends, if the start flag is not set.
5040 * Likewise for fallthru in, we check if ip is the start of a protected block and start is not set
5041 * TODO convert these checks to be done using flags and not this loop
5043 for (i = 0; i < ctx.header->num_clauses && ctx.valid; ++i) {
5044 MonoExceptionClause *clause = ctx.header->clauses + i;
5046 if ((clause->try_offset + clause->try_len == ip_offset) && start == 0) {
5047 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallthru off try block at 0x%04x", ip_offset));
5051 if ((clause->handler_offset + clause->handler_len == ip_offset) && start == 0) {
5052 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER)
5053 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("fallout of handler block at 0x%04x", ip_offset));
5055 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallout of handler block at 0x%04x", ip_offset));
5059 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER && clause->handler_offset == ip_offset && start == 0) {
5060 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("fallout of filter block at 0x%04x", ip_offset));
5064 if (clause->handler_offset == ip_offset && start == 0) {
5065 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallthru handler block at 0x%04x", ip_offset));
5069 if (clause->try_offset == ip_offset && ctx.eval.size > 0 && start == 0) {
5070 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Try to enter try block with a non-empty stack at 0x%04x", ip_offset));
5075 /*This must be done after fallthru detection otherwise it won't happen.*/
5077 /*FIXME remove this once we move all bad branch checking code to use BB only*/
5078 ctx.code [ip_offset].flags |= IL_CODE_FLAG_SEEN;
5087 VERIFIER_DEBUG ( printf ("extra merge needed! 0x%04x \n", ctx.target); );
5088 merge_stacks (&ctx, &ctx.eval, &ctx.code [ctx.target], FALSE, TRUE);
5091 merge_stacks (&ctx, &ctx.eval, &ctx.code[ip_offset], start, FALSE);
5094 /*TODO we can fast detect a forward branch or exception block targeting code after prefix, we should fail fast*/
5095 #ifdef MONO_VERIFIER_DEBUG
5098 discode = mono_disasm_code_one (NULL, method, ip, NULL);
5099 discode [strlen (discode) - 1] = 0; /* no \n */
5100 g_print ("[%d] %-29s (%d)\n", ip_offset, discode, ctx.eval.size);
5103 dump_stack_state (&ctx.code [ip_offset]);
5104 dump_stack_state (&ctx.eval);
5117 push_arg (&ctx, *ip - CEE_LDARG_0, FALSE);
5123 code_bounds_check (2);
5124 push_arg (&ctx, ip [1], *ip == CEE_LDARGA_S);
5128 case CEE_ADD_OVF_UN:
5129 do_binop (&ctx, *ip, add_ovf_un_table);
5133 case CEE_SUB_OVF_UN:
5134 do_binop (&ctx, *ip, sub_ovf_un_table);
5141 case CEE_MUL_OVF_UN:
5142 do_binop (&ctx, *ip, bin_ovf_table);
5147 do_binop (&ctx, *ip, add_table);
5152 do_binop (&ctx, *ip, sub_table);
5159 do_binop (&ctx, *ip, bin_op_table);
5168 do_binop (&ctx, *ip, int_bin_op_table);
5175 do_binop (&ctx, *ip, shift_op_table);
5180 if (!check_underflow (&ctx, 1))
5182 stack_pop_safe (&ctx);
5196 /*TODO support definite assignment verification? */
5197 push_local (&ctx, *ip - CEE_LDLOC_0, FALSE);
5205 store_local (&ctx, *ip - CEE_STLOC_0);
5210 code_bounds_check (2);
5211 store_local (&ctx, ip [1]);
5216 code_bounds_check (2);
5217 store_arg (&ctx, ip [1]);
5231 if (check_overflow (&ctx))
5232 stack_push_val (&ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
5237 code_bounds_check (2);
5238 if (check_overflow (&ctx))
5239 stack_push_val (&ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
5244 code_bounds_check (5);
5245 if (check_overflow (&ctx))
5246 stack_push_val (&ctx,TYPE_I4, &mono_defaults.int32_class->byval_arg);
5251 code_bounds_check (9);
5252 if (check_overflow (&ctx))
5253 stack_push_val (&ctx,TYPE_I8, &mono_defaults.int64_class->byval_arg);
5258 code_bounds_check (5);
5259 if (check_overflow (&ctx))
5260 stack_push_val (&ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
5265 code_bounds_check (9);
5266 if (check_overflow (&ctx))
5267 stack_push_val (&ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
5272 if (check_overflow (&ctx))
5273 stack_push_val (&ctx, TYPE_COMPLEX | NULL_LITERAL_MASK, &mono_defaults.object_class->byval_arg);
5279 code_bounds_check (2);
5280 do_branch_op (&ctx, (signed char)ip [1] + 2, cmp_br_eq_op);
5293 code_bounds_check (2);
5294 do_branch_op (&ctx, (signed char)ip [1] + 2, cmp_br_op);
5301 code_bounds_check (5);
5302 do_branch_op (&ctx, (gint32)read32 (ip + 1) + 5, cmp_br_eq_op);
5315 code_bounds_check (5);
5316 do_branch_op (&ctx, (gint32)read32 (ip + 1) + 5, cmp_br_op);
5323 code_bounds_check (2);
5324 push_local (&ctx, ip[1], *ip == CEE_LDLOCA_S);
5329 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5335 if (!check_underflow (&ctx, 1))
5337 if (!check_overflow (&ctx))
5339 top = stack_push (&ctx);
5340 copy_stack_value (top, stack_peek (&ctx, 1));
5346 code_bounds_check (5);
5348 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Eval stack must be empty in jmp at 0x%04x", ip_offset));
5349 token = read32 (ip + 1);
5350 if (in_any_block (ctx.header, ip_offset))
5351 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("jmp cannot escape exception blocks at 0x%04x", ip_offset));
5353 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Intruction jmp is not verifiable at 0x%04x", ctx.ip_offset));
5355 * FIXME: check signature, retval, arguments etc.
5361 code_bounds_check (5);
5362 do_invoke_method (&ctx, read32 (ip + 1), *ip == CEE_CALLVIRT);
5367 code_bounds_check (5);
5368 token = read32 (ip + 1);
5370 * FIXME: check signature, retval, arguments etc.
5371 * FIXME: check requirements for tail call
5373 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Intruction calli is not verifiable at 0x%04x", ctx.ip_offset));
5377 code_bounds_check (2);
5378 do_static_branch (&ctx, (signed char)ip [1] + 2);
5386 code_bounds_check (2);
5387 do_boolean_branch_op (&ctx, (signed char)ip [1] + 2);
5393 code_bounds_check (5);
5394 do_static_branch (&ctx, (gint32)read32 (ip + 1) + 5);
5402 code_bounds_check (5);
5403 do_boolean_branch_op (&ctx, (gint32)read32 (ip + 1) + 5);
5410 code_bounds_check (5);
5411 entries = read32 (ip + 1);
5413 if (entries > 0xFFFFFFFFU / sizeof (guint32))
5414 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Too many switch entries %x at 0x%04x", entries, ctx.ip_offset));
5417 code_bounds_check (sizeof (guint32) * entries);
5419 do_switch (&ctx, entries, ip);
5420 ip += sizeof (guint32) * entries;
5434 do_load_indirect (&ctx, *ip);
5446 do_store_indirect (&ctx, *ip);
5452 do_unary_math_op (&ctx, *ip);
5462 do_conversion (&ctx, TYPE_I4);
5468 do_conversion (&ctx, TYPE_I8);
5475 do_conversion (&ctx, TYPE_R8);
5481 do_conversion (&ctx, TYPE_NATIVE_INT);
5486 code_bounds_check (5);
5487 do_cpobj (&ctx, read32 (ip + 1));
5492 code_bounds_check (5);
5493 do_ldobj_value (&ctx, read32 (ip + 1));
5498 code_bounds_check (5);
5499 do_ldstr (&ctx, read32 (ip + 1));
5504 code_bounds_check (5);
5505 do_newobj (&ctx, read32 (ip + 1));
5511 code_bounds_check (5);
5512 do_cast (&ctx, read32 (ip + 1), *ip == CEE_CASTCLASS ? "castclass" : "isinst");
5518 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5523 code_bounds_check (5);
5524 do_unbox_value (&ctx, read32 (ip + 1));
5536 code_bounds_check (5);
5537 do_push_field (&ctx, read32 (ip + 1), *ip == CEE_LDFLDA);
5543 code_bounds_check (5);
5544 do_push_static_field (&ctx, read32 (ip + 1), *ip == CEE_LDSFLDA);
5549 code_bounds_check (5);
5550 do_store_field (&ctx, read32 (ip + 1));
5555 code_bounds_check (5);
5556 do_store_static_field (&ctx, read32 (ip + 1));
5561 code_bounds_check (5);
5562 do_stobj (&ctx, read32 (ip + 1));
5566 case CEE_CONV_OVF_I1_UN:
5567 case CEE_CONV_OVF_I2_UN:
5568 case CEE_CONV_OVF_I4_UN:
5569 case CEE_CONV_OVF_U1_UN:
5570 case CEE_CONV_OVF_U2_UN:
5571 case CEE_CONV_OVF_U4_UN:
5572 do_conversion (&ctx, TYPE_I4);
5576 case CEE_CONV_OVF_I8_UN:
5577 case CEE_CONV_OVF_U8_UN:
5578 do_conversion (&ctx, TYPE_I8);
5582 case CEE_CONV_OVF_I_UN:
5583 case CEE_CONV_OVF_U_UN:
5584 do_conversion (&ctx, TYPE_NATIVE_INT);
5589 code_bounds_check (5);
5590 do_box_value (&ctx, read32 (ip + 1));
5595 code_bounds_check (5);
5596 do_newarr (&ctx, read32 (ip + 1));
5606 code_bounds_check (5);
5607 do_ldelema (&ctx, read32 (ip + 1));
5621 case CEE_LDELEM_REF:
5622 do_ldelem (&ctx, *ip, 0);
5633 case CEE_STELEM_REF:
5634 do_stelem (&ctx, *ip, 0);
5639 code_bounds_check (5);
5640 do_ldelem (&ctx, *ip, read32 (ip + 1));
5645 code_bounds_check (5);
5646 do_stelem (&ctx, *ip, read32 (ip + 1));
5651 code_bounds_check (5);
5652 do_unbox_any (&ctx, read32 (ip + 1));
5656 case CEE_CONV_OVF_I1:
5657 case CEE_CONV_OVF_U1:
5658 case CEE_CONV_OVF_I2:
5659 case CEE_CONV_OVF_U2:
5660 case CEE_CONV_OVF_I4:
5661 case CEE_CONV_OVF_U4:
5662 do_conversion (&ctx, TYPE_I4);
5666 case CEE_CONV_OVF_I8:
5667 case CEE_CONV_OVF_U8:
5668 do_conversion (&ctx, TYPE_I8);
5672 case CEE_CONV_OVF_I:
5673 case CEE_CONV_OVF_U:
5674 do_conversion (&ctx, TYPE_NATIVE_INT);
5679 code_bounds_check (5);
5680 do_refanyval (&ctx, read32 (ip + 1));
5690 code_bounds_check (5);
5691 do_mkrefany (&ctx, read32 (ip + 1));
5696 code_bounds_check (5);
5697 do_load_token (&ctx, read32 (ip + 1));
5701 case CEE_ENDFINALLY:
5702 if (!is_correct_endfinally (ctx.header, ip_offset))
5703 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("endfinally must be used inside a finally/fault handler at 0x%04x", ctx.ip_offset));
5710 code_bounds_check (5);
5711 do_leave (&ctx, read32 (ip + 1) + 5);
5718 code_bounds_check (2);
5719 do_leave (&ctx, (signed char)ip [1] + 2);
5726 code_bounds_check (2);
5730 code_bounds_check (3);
5731 store_local (&ctx, read16 (ip + 1));
5736 do_cmp_op (&ctx, cmp_br_eq_op, *ip);
5744 do_cmp_op (&ctx, cmp_br_op, *ip);
5749 code_bounds_check (3);
5750 store_arg (&ctx, read16 (ip + 1) );
5756 if (!check_overflow (&ctx))
5758 if (ctx.signature->call_convention != MONO_CALL_VARARG)
5759 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Cannot use arglist on method without VARGARG calling convention at 0x%04x", ctx.ip_offset));
5760 set_stack_value (&ctx, stack_push (&ctx), &mono_defaults.argumenthandle_class->byval_arg, FALSE);
5765 code_bounds_check (5);
5766 do_load_function_ptr (&ctx, read32 (ip + 1), FALSE);
5771 code_bounds_check (5);
5772 do_load_function_ptr (&ctx, read32 (ip + 1), TRUE);
5778 code_bounds_check (3);
5779 push_arg (&ctx, read16 (ip + 1), *ip == CEE_LDARGA);
5785 code_bounds_check (3);
5786 push_local (&ctx, read16 (ip + 1), *ip == CEE_LDLOCA);
5799 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5803 do_endfilter (&ctx);
5807 case CEE_UNALIGNED_:
5808 code_bounds_check (2);
5809 prefix |= PREFIX_UNALIGNED;
5813 prefix |= PREFIX_VOLATILE;
5817 prefix |= PREFIX_TAIL;
5819 if (ip < end && (*ip != CEE_CALL && *ip != CEE_CALLI && *ip != CEE_CALLVIRT))
5820 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("tail prefix must be used only with call opcodes at 0x%04x", ip_offset));
5824 code_bounds_check (5);
5825 do_initobj (&ctx, read32 (ip + 1));
5829 case CEE_CONSTRAINED_:
5830 code_bounds_check (5);
5831 ctx.constrained_type = get_boxable_mono_type (&ctx, read32 (ip + 1), "constrained.");
5832 prefix |= PREFIX_CONSTRAINED;
5837 prefix |= PREFIX_READONLY;
5842 CLEAR_PREFIX (&ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
5843 if (!check_underflow (&ctx, 3))
5845 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Instruction cpblk is not verifiable at 0x%04x", ctx.ip_offset));
5850 CLEAR_PREFIX (&ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
5851 if (!check_underflow (&ctx, 3))
5853 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Instruction initblk is not verifiable at 0x%04x", ctx.ip_offset));
5861 if (!is_correct_rethrow (ctx.header, ip_offset))
5862 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("rethrow must be used inside a catch handler at 0x%04x", ctx.ip_offset));
5869 code_bounds_check (5);
5870 do_sizeof (&ctx, read32 (ip + 1));
5874 case CEE_REFANYTYPE:
5875 do_refanytype (&ctx);
5880 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction FE %x at 0x%04x", *ip, ctx.ip_offset));
5886 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction %x at 0x%04x", *ip, ctx.ip_offset));
5890 /*TODO we can fast detect a forward branch or exception block targeting code after prefix, we should fail fast*/
5892 if (!ctx.prefix_set) //first prefix
5893 ctx.code [ctx.ip_offset].flags |= IL_CODE_FLAG_SEEN;
5894 ctx.prefix_set |= prefix;
5895 ctx.has_flags = TRUE;
5899 ctx.code [ctx.ip_offset].flags |= IL_CODE_FLAG_SEEN;
5901 if (ctx.prefix_set & PREFIX_CONSTRAINED)
5902 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after constrained prefix at 0x%04x", ctx.ip_offset));
5903 if (ctx.prefix_set & PREFIX_READONLY)
5904 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after readonly prefix at 0x%04x", ctx.ip_offset));
5905 if (ctx.prefix_set & PREFIX_VOLATILE)
5906 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after volatile prefix at 0x%04x", ctx.ip_offset));
5907 if (ctx.prefix_set & PREFIX_UNALIGNED)
5908 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after unaligned prefix at 0x%04x", ctx.ip_offset));
5909 ctx.prefix_set = prefix = 0;
5910 ctx.has_flags = FALSE;
5914 * if ip != end we overflowed: mark as error.
5916 if ((ip != end || !start) && ctx.verifiable && !ctx.list) {
5917 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Run ahead of method code at 0x%04x", ip_offset));
5920 /*We should guard against the last decoded opcode, otherwise we might add errors that doesn't make sense.*/
5921 for (i = 0; i < ctx.code_size && i < ip_offset; ++i) {
5922 if (ctx.code [i].flags & IL_CODE_FLAG_WAS_TARGET) {
5923 if (!(ctx.code [i].flags & IL_CODE_FLAG_SEEN))
5924 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or exception block target middle of intruction at 0x%04x", i));
5926 if (ctx.code [i].flags & IL_CODE_DELEGATE_SEQUENCE)
5927 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Branch to delegate code sequence at 0x%04x", i));
5929 if ((ctx.code [i].flags & IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL) && ctx.has_this_store)
5930 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Invalid ldftn with virtual function in method with stdarg 0 at 0x%04x", i));
5932 if ((ctx.code [i].flags & IL_CODE_CALL_NONFINAL_VIRTUAL) && ctx.has_this_store)
5933 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));
5936 if (mono_method_is_constructor (ctx.method) && !ctx.super_ctor_called && !ctx.method->klass->valuetype && ctx.method->klass != mono_defaults.object_class) {
5937 char *method_name = mono_method_full_name (ctx.method, TRUE);
5938 char *type = mono_type_get_full_name (ctx.method->klass);
5939 if (ctx.method->klass->parent && ctx.method->klass->parent->exception_type != MONO_EXCEPTION_NONE)
5940 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));
5942 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Constructor %s for type %s not calling base type ctor.", method_name, type));
5943 g_free (method_name);
5949 for (i = 0; i < ctx.header->code_size; ++i) {
5950 if (ctx.code [i].stack)
5951 g_free (ctx.code [i].stack);
5955 for (tmp = ctx.funptrs; tmp; tmp = tmp->next)
5957 g_slist_free (ctx.funptrs);
5959 for (tmp = ctx.exception_types; tmp; tmp = tmp->next)
5960 mono_metadata_free_type (tmp->data);
5961 g_slist_free (ctx.exception_types);
5963 for (i = 0; i < ctx.num_locals; ++i) {
5965 mono_metadata_free_type (ctx.locals [i]);
5967 for (i = 0; i < ctx.max_args; ++i) {
5969 mono_metadata_free_type (ctx.params [i]);
5973 g_free (ctx.eval.stack);
5976 g_free (ctx.locals);
5977 g_free (ctx.params);
5978 mono_basic_block_free (original_bb);
5979 mono_metadata_free_mh (ctx.header);
5981 finish_collect_stats ();
5986 mono_verify_corlib ()
5988 /* This is a public API function so cannot be removed */
5993 * Returns true if @method needs to be verified.
5997 mono_verifier_is_enabled_for_method (MonoMethod *method)
5999 return mono_verifier_is_enabled_for_class (method->klass) && (method->wrapper_type == MONO_WRAPPER_NONE || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD);
6003 * Returns true if @klass need to be verified.
6007 mono_verifier_is_enabled_for_class (MonoClass *klass)
6009 return verify_all || (verifier_mode > MONO_VERIFIER_MODE_OFF && !(klass->image->assembly && klass->image->assembly->in_gac) && klass->image != mono_defaults.corlib);
6013 mono_verifier_is_enabled_for_image (MonoImage *image)
6015 return verify_all || verifier_mode > MONO_VERIFIER_MODE_OFF;
6019 * Dynamic methods are not considered full trust since if the user is trusted and need to
6020 * generate unsafe code, make the method skip verification - this is a known good way to do it.
6023 mono_verifier_is_method_full_trust (MonoMethod *method)
6025 return mono_verifier_is_class_full_trust (method->klass) && !method->dynamic;
6029 * Returns if @klass is under full trust or not.
6031 * TODO This code doesn't take CAS into account.
6033 * Under verify_all all user code must be verifiable if no security option was set
6037 mono_verifier_is_class_full_trust (MonoClass *klass)
6039 /* under CoreCLR code is trusted if it is part of the "platform" otherwise all code inside the GAC is trusted */
6040 gboolean trusted_location = !mono_security_core_clr_enabled () ?
6041 (klass->image->assembly && klass->image->assembly->in_gac) : mono_security_core_clr_is_platform_image (klass->image);
6043 if (verify_all && verifier_mode == MONO_VERIFIER_MODE_OFF)
6044 return trusted_location || klass->image == mono_defaults.corlib;
6045 return verifier_mode < MONO_VERIFIER_MODE_VERIFIABLE || trusted_location || klass->image == mono_defaults.corlib;
6049 mono_method_verify_with_current_settings (MonoMethod *method, gboolean skip_visibility, gboolean is_fulltrust)
6051 return mono_method_verify (method,
6052 (verifier_mode != MONO_VERIFIER_MODE_STRICT ? MONO_VERIFY_NON_STRICT: 0)
6053 | (!is_fulltrust && !mono_verifier_is_method_full_trust (method) ? MONO_VERIFY_FAIL_FAST : 0)
6054 | (skip_visibility ? MONO_VERIFY_SKIP_VISIBILITY : 0));
6058 get_field_end (MonoClassField *field)
6061 int size = mono_type_size (field->type, &align);
6063 size = 4; /*FIXME Is this a safe bet?*/
6064 return size + field->offset;
6068 verify_class_for_overlapping_reference_fields (MonoClass *class)
6071 gpointer iter = NULL;
6072 MonoClassField *field;
6073 gboolean is_fulltrust = mono_verifier_is_class_full_trust (class);
6074 /*We can't skip types with !has_references since this is calculated after we have run.*/
6075 if (!((class->flags & TYPE_ATTRIBUTE_LAYOUT_MASK) == TYPE_ATTRIBUTE_EXPLICIT_LAYOUT))
6079 /*We must check for stuff overlapping reference fields.
6080 The outer loop uses mono_class_get_fields to ensure that MonoClass:fields get inited.
6082 while ((field = mono_class_get_fields (class, &iter))) {
6083 int fieldEnd = get_field_end (field);
6084 gboolean is_valuetype = !MONO_TYPE_IS_REFERENCE (field->type);
6087 if (mono_field_is_deleted (field) || (field->type->attrs & FIELD_ATTRIBUTE_STATIC))
6090 for (j = i; j < class->field.count; ++j) {
6091 MonoClassField *other = &class->fields [j];
6092 int otherEnd = get_field_end (other);
6093 if (mono_field_is_deleted (other) || (is_valuetype && !MONO_TYPE_IS_REFERENCE (other->type)) || (other->type->attrs & FIELD_ATTRIBUTE_STATIC))
6096 if (!is_valuetype && MONO_TYPE_IS_REFERENCE (other->type) && field->offset == other->offset && is_fulltrust)
6099 if ((otherEnd > field->offset && otherEnd <= fieldEnd) || (other->offset >= field->offset && other->offset < fieldEnd))
6107 field_hash (gconstpointer key)
6109 const MonoClassField *field = key;
6110 return g_str_hash (field->name) ^ mono_metadata_type_hash (field->type); /**/
6114 field_equals (gconstpointer _a, gconstpointer _b)
6116 const MonoClassField *a = _a;
6117 const MonoClassField *b = _b;
6118 return !strcmp (a->name, b->name) && mono_metadata_type_equal (a->type, b->type);
6123 verify_class_fields (MonoClass *class)
6125 gpointer iter = NULL;
6126 MonoClassField *field;
6127 MonoGenericContext *context = mono_class_get_context (class);
6128 GHashTable *unique_fields = g_hash_table_new_full (&field_hash, &field_equals, NULL, NULL);
6129 if (class->generic_container)
6130 context = &class->generic_container->context;
6132 while ((field = mono_class_get_fields (class, &iter)) != NULL) {
6133 if (!mono_type_is_valid_type_in_context (field->type, context)) {
6134 g_hash_table_destroy (unique_fields);
6137 if (g_hash_table_lookup (unique_fields, field)) {
6138 g_hash_table_destroy (unique_fields);
6141 g_hash_table_insert (unique_fields, field, field);
6143 g_hash_table_destroy (unique_fields);
6148 verify_interfaces (MonoClass *class)
6151 for (i = 0; i < class->interface_count; ++i) {
6152 MonoClass *iface = class->interfaces [i];
6153 if (!(iface->flags & TYPE_ATTRIBUTE_INTERFACE))
6160 verify_valuetype_layout_with_target (MonoClass *class, MonoClass *target_class)
6163 gpointer iter = NULL;
6164 MonoClassField *field;
6165 MonoClass *field_class;
6167 if (!class->valuetype)
6170 type = class->byval_arg.type;
6171 /*primitive type fields are not properly decoded*/
6172 if ((type >= MONO_TYPE_BOOLEAN && type <= MONO_TYPE_R8) || (type >= MONO_TYPE_I && type <= MONO_TYPE_U))
6175 while ((field = mono_class_get_fields (class, &iter)) != NULL) {
6179 if (field->type->attrs & (FIELD_ATTRIBUTE_STATIC | FIELD_ATTRIBUTE_HAS_FIELD_RVA))
6182 field_class = mono_class_get_generic_type_definition (mono_class_from_mono_type (field->type));
6184 if (field_class == target_class || class == field_class || !verify_valuetype_layout_with_target (field_class, target_class))
6192 verify_valuetype_layout (MonoClass *class)
6195 res = verify_valuetype_layout_with_target (class, class);
6200 recursive_mark_constraint_args (MonoBitSet *used_args, MonoGenericContainer *gc, MonoType *type)
6203 MonoClass **constraints;
6204 MonoGenericParamInfo *param_info;
6206 g_assert (mono_type_is_generic_argument (type));
6208 idx = mono_type_get_generic_param_num (type);
6209 if (mono_bitset_test_fast (used_args, idx))
6212 mono_bitset_set_fast (used_args, idx);
6213 param_info = mono_generic_container_get_param_info (gc, idx);
6215 if (!param_info->constraints)
6218 for (constraints = param_info->constraints; *constraints; ++constraints) {
6219 MonoClass *ctr = *constraints;
6220 MonoType *constraint_type = &ctr->byval_arg;
6222 if (mono_type_is_generic_argument (constraint_type) && !recursive_mark_constraint_args (used_args, gc, constraint_type))
6229 verify_generic_parameters (MonoClass *class)
6232 MonoGenericContainer *gc = class->generic_container;
6233 MonoBitSet *used_args = mono_bitset_new (gc->type_argc, 0);
6235 for (i = 0; i < gc->type_argc; ++i) {
6236 MonoGenericParamInfo *param_info = mono_generic_container_get_param_info (gc, i);
6237 MonoClass **constraints;
6239 if (!param_info->constraints)
6242 mono_bitset_clear_all (used_args);
6243 mono_bitset_set_fast (used_args, i);
6245 for (constraints = param_info->constraints; *constraints; ++constraints) {
6246 MonoClass *ctr = *constraints;
6247 MonoType *constraint_type = &ctr->byval_arg;
6249 if (!mono_class_can_access_class (class, ctr))
6252 if (!mono_type_is_valid_type_in_context (constraint_type, &gc->context))
6255 if (mono_type_is_generic_argument (constraint_type) && !recursive_mark_constraint_args (used_args, gc, constraint_type))
6257 if (ctr->generic_class && !mono_class_is_valid_generic_instantiation (NULL, ctr))
6261 mono_bitset_free (used_args);
6265 mono_bitset_free (used_args);
6270 * Check if the class is verifiable.
6272 * Right now there are no conditions that make a class a valid but not verifiable. Both overlapping reference
6273 * field and invalid generic instantiation are fatal errors.
6275 * This method must be safe to be called from mono_class_init and all code must be carefull about that.
6279 mono_verifier_verify_class (MonoClass *class)
6281 /*Neither <Module>, object or ifaces have parent.*/
6282 if (!class->parent &&
6283 class != mono_defaults.object_class &&
6284 !MONO_CLASS_IS_INTERFACE (class) &&
6285 (!class->image->dynamic && class->type_token != 0x2000001)) /*<Module> is the first type in the assembly*/
6287 if (class->parent) {
6288 if (MONO_CLASS_IS_INTERFACE (class->parent))
6290 if (!class->generic_class && class->parent->generic_container)
6292 if (class->parent->generic_class && !class->generic_class) {
6293 MonoGenericContext *context = mono_class_get_context (class);
6294 if (class->generic_container)
6295 context = &class->generic_container->context;
6296 if (!mono_type_is_valid_type_in_context (&class->parent->byval_arg, context))
6300 if (class->generic_container && (class->flags & TYPE_ATTRIBUTE_LAYOUT_MASK) == TYPE_ATTRIBUTE_EXPLICIT_LAYOUT)
6302 if (class->generic_container && !verify_generic_parameters (class))
6304 if (!verify_class_for_overlapping_reference_fields (class))
6306 if (class->generic_class && !mono_class_is_valid_generic_instantiation (NULL, class))
6308 if (class->generic_class == NULL && !verify_class_fields (class))
6310 if (class->valuetype && !verify_valuetype_layout (class))
6312 if (!verify_interfaces (class))
6318 mono_verifier_class_is_valid_generic_instantiation (MonoClass *class)
6320 return mono_class_is_valid_generic_instantiation (NULL, class);
6324 mono_verifier_is_method_valid_generic_instantiation (MonoMethod *method)
6326 if (!method->is_inflated)
6328 return mono_method_is_valid_generic_instantiation (NULL, method);
6334 mono_verifier_verify_class (MonoClass *class)
6336 /* The verifier was disabled at compile time */
6341 mono_method_verify_with_current_settings (MonoMethod *method, gboolean skip_visibility, gboolean is_fulltrust)
6343 /* The verifier was disabled at compile time */
6348 mono_verifier_is_class_full_trust (MonoClass *klass)
6350 /* The verifier was disabled at compile time */
6355 mono_verifier_is_method_full_trust (MonoMethod *method)
6357 /* The verifier was disabled at compile time */
6362 mono_verifier_is_enabled_for_image (MonoImage *image)
6364 /* The verifier was disabled at compile time */
6369 mono_verifier_is_enabled_for_class (MonoClass *klass)
6371 /* The verifier was disabled at compile time */
6376 mono_verifier_is_enabled_for_method (MonoMethod *method)
6378 /* The verifier was disabled at compile time */
6383 mono_method_verify (MonoMethod *method, int level)
6385 /* The verifier was disabled at compile time */
6390 mono_free_verify_list (GSList *list)
6392 /* The verifier was disabled at compile time */
6393 /* will always be null if verifier is disabled */
6397 mono_verifier_class_is_valid_generic_instantiation (MonoClass *class)
6403 mono_verifier_is_method_valid_generic_instantiation (MonoMethod *method)