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
10 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
14 #include <mono/metadata/object-internals.h>
15 #include <mono/metadata/dynamic-image-internals.h>
16 #include <mono/metadata/verify.h>
17 #include <mono/metadata/verify-internals.h>
18 #include <mono/metadata/opcodes.h>
19 #include <mono/metadata/tabledefs.h>
20 #include <mono/metadata/reflection.h>
21 #include <mono/metadata/debug-helpers.h>
22 #include <mono/metadata/mono-endian.h>
23 #include <mono/metadata/metadata.h>
24 #include <mono/metadata/metadata-internals.h>
25 #include <mono/metadata/class-internals.h>
26 #include <mono/metadata/security-manager.h>
27 #include <mono/metadata/security-core-clr.h>
28 #include <mono/metadata/tokentype.h>
29 #include <mono/metadata/mono-basic-block.h>
30 #include <mono/metadata/attrdefs.h>
31 #include <mono/metadata/class-internals.h>
32 #include <mono/utils/mono-counters.h>
33 #include <mono/utils/monobitset.h>
37 static MiniVerifierMode verifier_mode = MONO_VERIFIER_MODE_OFF;
38 static gboolean verify_all = FALSE;
41 * Set the desired level of checks for the verfier.
45 mono_verifier_set_mode (MiniVerifierMode mode)
51 mono_verifier_enable_verify_all ()
56 #ifndef DISABLE_VERIFIER
58 * Pull the list of opcodes
60 #define OPDEF(a,b,c,d,e,f,g,h,i,j) \
64 #include "mono/cil/opcode.def"
69 #ifdef MONO_VERIFIER_DEBUG
70 #define VERIFIER_DEBUG(code) do { code } while (0)
72 #define VERIFIER_DEBUG(code)
75 //////////////////////////////////////////////////////////////////
76 #define IS_STRICT_MODE(ctx) (((ctx)->level & MONO_VERIFY_NON_STRICT) == 0)
77 #define IS_FAIL_FAST_MODE(ctx) (((ctx)->level & MONO_VERIFY_FAIL_FAST) == MONO_VERIFY_FAIL_FAST)
78 #define IS_SKIP_VISIBILITY(ctx) (((ctx)->level & MONO_VERIFY_SKIP_VISIBILITY) == MONO_VERIFY_SKIP_VISIBILITY)
79 #define IS_REPORT_ALL_ERRORS(ctx) (((ctx)->level & MONO_VERIFY_REPORT_ALL_ERRORS) == MONO_VERIFY_REPORT_ALL_ERRORS)
80 #define CLEAR_PREFIX(ctx, prefix) do { (ctx)->prefix_set &= ~(prefix); } while (0)
81 #define ADD_VERIFY_INFO(__ctx, __msg, __status, __exception) \
83 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
84 vinfo->info.status = __status; \
85 vinfo->info.message = ( __msg ); \
86 vinfo->exception_type = (__exception); \
87 (__ctx)->list = g_slist_prepend ((__ctx)->list, vinfo); \
90 //TODO support MONO_VERIFY_REPORT_ALL_ERRORS
91 #define ADD_VERIFY_ERROR(__ctx, __msg) \
93 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_ERROR, MONO_EXCEPTION_INVALID_PROGRAM); \
97 #define CODE_NOT_VERIFIABLE(__ctx, __msg) \
99 if ((__ctx)->verifiable || IS_REPORT_ALL_ERRORS (__ctx)) { \
100 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_NOT_VERIFIABLE, MONO_EXCEPTION_UNVERIFIABLE_IL); \
101 (__ctx)->verifiable = 0; \
102 if (IS_FAIL_FAST_MODE (__ctx)) \
103 (__ctx)->valid = 0; \
107 #define ADD_VERIFY_ERROR2(__ctx, __msg, __exception) \
109 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_ERROR, __exception); \
110 (__ctx)->valid = 0; \
113 #define CODE_NOT_VERIFIABLE2(__ctx, __msg, __exception) \
115 if ((__ctx)->verifiable || IS_REPORT_ALL_ERRORS (__ctx)) { \
116 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_NOT_VERIFIABLE, __exception); \
117 (__ctx)->verifiable = 0; \
118 if (IS_FAIL_FAST_MODE (__ctx)) \
119 (__ctx)->valid = 0; \
123 #define CHECK_ADD4_OVERFLOW_UN(a, b) ((guint32)(0xFFFFFFFFU) - (guint32)(b) < (guint32)(a))
124 #define CHECK_ADD8_OVERFLOW_UN(a, b) ((guint64)(0xFFFFFFFFFFFFFFFFUL) - (guint64)(b) < (guint64)(a))
126 #if SIZEOF_VOID_P == 4
127 #define CHECK_ADDP_OVERFLOW_UN(a,b) CHECK_ADD4_OVERFLOW_UN(a, b)
129 #define CHECK_ADDP_OVERFLOW_UN(a,b) CHECK_ADD8_OVERFLOW_UN(a, b)
132 #define ADDP_IS_GREATER_OR_OVF(a, b, c) (((a) + (b) > (c)) || CHECK_ADDP_OVERFLOW_UN (a, b))
133 #define ADD_IS_GREATER_OR_OVF(a, b, c) (((a) + (b) > (c)) || CHECK_ADD4_OVERFLOW_UN (a, b))
135 /*Flags to be used with ILCodeDesc::flags */
137 /*Instruction has not been processed.*/
138 IL_CODE_FLAG_NOT_PROCESSED = 0,
139 /*Instruction was decoded by mono_method_verify loop.*/
140 IL_CODE_FLAG_SEEN = 1,
141 /*Instruction was target of a branch or is at a protected block boundary.*/
142 IL_CODE_FLAG_WAS_TARGET = 2,
143 /*Used by stack_init to avoid double initialize each entry.*/
144 IL_CODE_FLAG_STACK_INITED = 4,
145 /*Used by merge_stacks to decide if it should just copy the eval stack.*/
146 IL_CODE_STACK_MERGED = 8,
147 /*This instruction is part of the delegate construction sequence, it cannot be target of a branch.*/
148 IL_CODE_DELEGATE_SEQUENCE = 0x10,
149 /*This is a delegate created from a ldftn to a non final virtual method*/
150 IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL = 0x20,
151 /*This is a call to a non final virtual method*/
152 IL_CODE_CALL_NONFINAL_VIRTUAL = 0x40,
170 guint16 size, max_size;
187 /*Allocated fnptr MonoType that should be freed by us.*/
189 /*Type dup'ed exception types from catch blocks.*/
190 GSList *exception_types;
195 /*TODO get rid of target here, need_merge in mono_method_verify and hoist the merging code in the branching code*/
199 MonoMethodSignature *signature;
200 MonoMethodHeader *header;
202 MonoGenericContext *generic_context;
206 /*This flag helps solving a corner case of delegate verification in that you cannot have a "starg 0"
207 *on a method that creates a delegate for a non-final virtual method using ldftn*/
208 gboolean has_this_store;
210 /*This flag is used to control if the contructor of the parent class has been called.
211 *If the this pointer is pushed on the eval stack and it's a reference type constructor and
212 * super_ctor_called is false, the uninitialized flag is set on the pushed value.
214 * Poping an uninitialized this ptr from the eval stack is an unverifiable operation unless
215 * the safe variant is used. Only a few opcodes can use it : dup, pop, ldfld, stfld and call to a constructor.
217 gboolean super_ctor_called;
221 MonoType *constrained_type;
225 merge_stacks (VerifyContext *ctx, ILCodeDesc *from, ILCodeDesc *to, gboolean start, gboolean external);
228 get_stack_type (MonoType *type);
231 mono_delegate_signature_equal (MonoMethodSignature *delegate_sig, MonoMethodSignature *method_sig, gboolean is_static_ldftn);
234 mono_class_is_valid_generic_instantiation (VerifyContext *ctx, MonoClass *klass);
237 mono_method_is_valid_generic_instantiation (VerifyContext *ctx, MonoMethod *method);
239 static MonoGenericParam*
240 verifier_get_generic_param_from_type (VerifyContext *ctx, MonoType *type);
243 verifier_class_is_assignable_from (MonoClass *target, MonoClass *candidate);
244 //////////////////////////////////////////////////////////////////
249 TYPE_INV = 0, /* leave at 0. */
254 /* Used by operator tables to resolve pointer types (managed & unmanaged) and by unmanaged pointer types*/
256 /* value types and classes */
258 /* Number of types, used to define the size of the tables*/
261 /* Used by tables to signal that a result is not verifiable*/
262 NON_VERIFIABLE_RESULT = 0x80,
264 /*Mask used to extract just the type, excluding flags */
267 /* The stack type is a managed pointer, unmask the value to res */
268 POINTER_MASK = 0x100,
270 /*Stack type with the pointer mask*/
271 RAW_TYPE_MASK = 0x10F,
273 /* Controlled Mutability Manager Pointer */
276 /* The stack type is a null literal*/
277 NULL_LITERAL_MASK = 0x400,
279 /**Used by ldarg.0 and family to let delegate verification happens.*/
280 THIS_POINTER_MASK = 0x800,
282 /**Signals that this is a boxed value type*/
285 /*This is an unitialized this ref*/
286 UNINIT_THIS_MASK = 0x2000,
289 static const char* const
290 type_names [TYPE_MAX + 1] = {
301 PREFIX_UNALIGNED = 1,
304 PREFIX_CONSTRAINED = 8,
307 //////////////////////////////////////////////////////////////////
309 #ifdef ENABLE_VERIFIER_STATS
311 #define _MEM_ALLOC(amt) do { allocated_memory += (amt); working_set += (amt); } while (0)
312 #define _MEM_FREE(amt) do { working_set -= (amt); } while (0)
314 static int allocated_memory;
315 static int working_set;
316 static int max_allocated_memory;
317 static int max_working_set;
318 static int total_allocated_memory;
321 finish_collect_stats (void)
323 max_allocated_memory = MAX (max_allocated_memory, allocated_memory);
324 max_working_set = MAX (max_working_set, working_set);
325 total_allocated_memory += allocated_memory;
326 allocated_memory = working_set = 0;
330 init_verifier_stats (void)
332 static gboolean inited;
335 mono_counters_register ("Maximum memory allocated during verification", MONO_COUNTER_METADATA | MONO_COUNTER_INT, &max_allocated_memory);
336 mono_counters_register ("Maximum memory used during verification", MONO_COUNTER_METADATA | MONO_COUNTER_INT, &max_working_set);
337 mono_counters_register ("Total memory allocated for verification", MONO_COUNTER_METADATA | MONO_COUNTER_INT, &total_allocated_memory);
343 #define _MEM_ALLOC(amt) do {} while (0)
344 #define _MEM_FREE(amt) do { } while (0)
346 #define finish_collect_stats()
347 #define init_verifier_stats()
352 //////////////////////////////////////////////////////////////////
355 /*Token validation macros and functions */
356 #define IS_MEMBER_REF(token) (mono_metadata_token_table (token) == MONO_TABLE_MEMBERREF)
357 #define IS_METHOD_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
358 #define IS_METHOD_SPEC(token) (mono_metadata_token_table (token) == MONO_TABLE_METHODSPEC)
359 #define IS_FIELD_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_FIELD)
361 #define IS_TYPE_REF(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPEREF)
362 #define IS_TYPE_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPEDEF)
363 #define IS_TYPE_SPEC(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPESPEC)
364 #define IS_METHOD_DEF_OR_REF_OR_SPEC(token) (IS_METHOD_DEF (token) || IS_MEMBER_REF (token) || IS_METHOD_SPEC (token))
365 #define IS_TYPE_DEF_OR_REF_OR_SPEC(token) (IS_TYPE_DEF (token) || IS_TYPE_REF (token) || IS_TYPE_SPEC (token))
366 #define IS_FIELD_DEF_OR_REF(token) (IS_FIELD_DEF (token) || IS_MEMBER_REF (token))
369 * Verify if @token refers to a valid row on int's table.
372 token_bounds_check (MonoImage *image, guint32 token)
374 if (image_is_dynamic (image))
375 return mono_dynamic_image_is_valid_token ((MonoDynamicImage*)image, token);
376 return image->tables [mono_metadata_token_table (token)].rows >= mono_metadata_token_index (token) && mono_metadata_token_index (token) > 0;
380 mono_type_create_fnptr_from_mono_method (VerifyContext *ctx, MonoMethod *method)
382 MonoType *res = g_new0 (MonoType, 1);
383 _MEM_ALLOC (sizeof (MonoType));
385 //FIXME use mono_method_get_signature_full
386 res->data.method = mono_method_signature (method);
387 res->type = MONO_TYPE_FNPTR;
388 ctx->funptrs = g_slist_prepend (ctx->funptrs, res);
393 * mono_type_is_enum_type:
395 * Returns: TRUE if @type is an enum type.
398 mono_type_is_enum_type (MonoType *type)
400 if (type->type == MONO_TYPE_VALUETYPE && type->data.klass->enumtype)
402 if (type->type == MONO_TYPE_GENERICINST && type->data.generic_class->container_class->enumtype)
408 * mono_type_is_value_type:
410 * Returns: TRUE if @type is named after @namespace.@name.
414 mono_type_is_value_type (MonoType *type, const char *namespace_, const char *name)
416 return type->type == MONO_TYPE_VALUETYPE &&
417 !strcmp (namespace_, type->data.klass->name_space) &&
418 !strcmp (name, type->data.klass->name);
422 * Returns TURE if @type is VAR or MVAR
425 mono_type_is_generic_argument (MonoType *type)
427 return type->type == MONO_TYPE_VAR || type->type == MONO_TYPE_MVAR;
431 * mono_type_get_underlying_type_any:
433 * This functions is just like mono_type_get_underlying_type but it doesn't care if the type is byref.
435 * Returns the underlying type of @type regardless if it is byref or not.
438 mono_type_get_underlying_type_any (MonoType *type)
440 if (type->type == MONO_TYPE_VALUETYPE && type->data.klass->enumtype)
441 return mono_class_enum_basetype (type->data.klass);
442 if (type->type == MONO_TYPE_GENERICINST && type->data.generic_class->container_class->enumtype)
443 return mono_class_enum_basetype (type->data.generic_class->container_class);
447 static G_GNUC_UNUSED const char*
448 mono_type_get_stack_name (MonoType *type)
450 return type_names [get_stack_type (type) & TYPE_MASK];
453 #define CTOR_REQUIRED_FLAGS (METHOD_ATTRIBUTE_SPECIAL_NAME | METHOD_ATTRIBUTE_RT_SPECIAL_NAME)
454 #define CTOR_INVALID_FLAGS (METHOD_ATTRIBUTE_STATIC)
457 mono_method_is_constructor (MonoMethod *method)
459 return ((method->flags & CTOR_REQUIRED_FLAGS) == CTOR_REQUIRED_FLAGS &&
460 !(method->flags & CTOR_INVALID_FLAGS) &&
461 !strcmp (".ctor", method->name));
465 mono_class_has_default_constructor (MonoClass *klass)
470 mono_class_setup_methods (klass);
471 if (mono_class_has_failure (klass))
474 int mcount = mono_class_get_method_count (klass);
475 for (i = 0; i < mcount; ++i) {
476 method = klass->methods [i];
477 if (mono_method_is_constructor (method) &&
478 mono_method_signature (method) &&
479 mono_method_signature (method)->param_count == 0 &&
480 (method->flags & METHOD_ATTRIBUTE_MEMBER_ACCESS_MASK) == METHOD_ATTRIBUTE_PUBLIC)
487 * Verify if @type is valid for the given @ctx verification context.
488 * this function checks for VAR and MVAR types that are invalid under the current verifier,
491 mono_type_is_valid_type_in_context_full (MonoType *type, MonoGenericContext *context, gboolean check_gtd)
494 MonoGenericInst *inst;
496 switch (type->type) {
501 inst = type->type == MONO_TYPE_VAR ? context->class_inst : context->method_inst;
502 if (!inst || mono_type_get_generic_param_num (type) >= inst->type_argc)
505 case MONO_TYPE_SZARRAY:
506 return mono_type_is_valid_type_in_context_full (&type->data.klass->byval_arg, context, check_gtd);
507 case MONO_TYPE_ARRAY:
508 return mono_type_is_valid_type_in_context_full (&type->data.array->eklass->byval_arg, context, check_gtd);
510 return mono_type_is_valid_type_in_context_full (type->data.type, context, check_gtd);
511 case MONO_TYPE_GENERICINST:
512 inst = type->data.generic_class->context.class_inst;
515 for (i = 0; i < inst->type_argc; ++i)
516 if (!mono_type_is_valid_type_in_context_full (inst->type_argv [i], context, check_gtd))
519 case MONO_TYPE_CLASS:
520 case MONO_TYPE_VALUETYPE: {
521 MonoClass *klass = type->data.klass;
523 * It's possible to encode generic'sh types in such a way that they disguise themselves as class or valuetype.
524 * Fixing the type decoding is really tricky since under some cases this behavior is needed, for example, to
525 * have a 'class' type pointing to a 'genericinst' class.
527 * For the runtime these non canonical (weird) encodings work fine, the worst they can cause is some
528 * reflection oddities which are harmless - to security at least.
530 if (klass->byval_arg.type != type->type)
531 return mono_type_is_valid_type_in_context_full (&klass->byval_arg, context, check_gtd);
533 if (check_gtd && mono_class_is_gtd (klass))
544 mono_type_is_valid_type_in_context (MonoType *type, MonoGenericContext *context)
546 return mono_type_is_valid_type_in_context_full (type, context, FALSE);
549 /*This function returns NULL if the type is not instantiatable*/
551 verifier_inflate_type (VerifyContext *ctx, MonoType *type, MonoGenericContext *context)
556 result = mono_class_inflate_generic_type_checked (type, context, &error);
557 if (!mono_error_ok (&error)) {
558 mono_error_cleanup (&error);
564 /*A side note here. We don't need to check if arguments are broken since this
565 is only need to be done by the runtime before realizing the type.
568 is_valid_generic_instantiation (MonoGenericContainer *gc, MonoGenericContext *context, MonoGenericInst *ginst)
573 if (ginst->type_argc != gc->type_argc)
576 for (i = 0; i < gc->type_argc; ++i) {
577 MonoGenericParamInfo *param_info = mono_generic_container_get_param_info (gc, i);
578 MonoClass *paramClass;
579 MonoClass **constraints;
580 MonoType *param_type = ginst->type_argv [i];
582 /*it's not our job to validate type variables*/
583 if (mono_type_is_generic_argument (param_type))
586 paramClass = mono_class_from_mono_type (param_type);
589 /* A GTD can't be a generic argument.
591 * Due to how types are encoded we must check for the case of a genericinst MonoType and GTD MonoClass.
592 * This happens in cases such as: class Foo<T> { void X() { new Bar<T> (); } }
594 * Open instantiations can have GTDs as this happens when one type is instantiated with others params
595 * and the former has an expansion into the later. For example:
597 * class A<T>: B<K> {}
598 * The type A <K> has a parent B<K>, that is inflated into the GTD B<>.
599 * Since A<K> is open, thus not instantiatable, this is valid.
601 if (mono_class_is_gtd (paramClass) && param_type->type != MONO_TYPE_GENERICINST && !ginst->is_open)
604 /*it's not safe to call mono_class_init from here*/
605 if (mono_class_is_ginst (paramClass) && !paramClass->inited) {
606 if (!mono_class_is_valid_generic_instantiation (NULL, paramClass))
610 if (!param_info->constraints && !(param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK))
613 if ((param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT) && (!paramClass->valuetype || mono_class_is_nullable (paramClass)))
616 if ((param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_REFERENCE_TYPE_CONSTRAINT) && paramClass->valuetype)
619 if ((param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_CONSTRUCTOR_CONSTRAINT) && !paramClass->valuetype && !mono_class_has_default_constructor (paramClass))
622 if (!param_info->constraints)
625 for (constraints = param_info->constraints; *constraints; ++constraints) {
626 MonoClass *ctr = *constraints;
629 inflated = mono_class_inflate_generic_type_checked (&ctr->byval_arg, context, &error);
630 if (!mono_error_ok (&error)) {
631 mono_error_cleanup (&error);
634 ctr = mono_class_from_mono_type (inflated);
635 mono_metadata_free_type (inflated);
637 /*FIXME maybe we need the same this as verifier_class_is_assignable_from*/
638 if (!mono_class_is_assignable_from_slow (ctr, paramClass))
646 * mono_generic_param_is_constraint_compatible:
648 * Returns: TRUE if @candidate is constraint compatible with @target.
650 * This means that @candidate constraints are a super set of @target constaints
653 mono_generic_param_is_constraint_compatible (VerifyContext *ctx, MonoGenericParam *target, MonoGenericParam *candidate, MonoClass *candidate_param_class, MonoGenericContext *context)
655 MonoGenericParamInfo *tinfo = mono_generic_param_info (target);
656 MonoGenericParamInfo *cinfo = mono_generic_param_info (candidate);
657 MonoClass **candidate_class;
658 gboolean class_constraint_satisfied = FALSE;
659 gboolean valuetype_constraint_satisfied = FALSE;
661 int tmask = tinfo->flags & GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK;
662 int cmask = cinfo->flags & GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK;
664 if (cinfo->constraints) {
665 for (candidate_class = cinfo->constraints; *candidate_class; ++candidate_class) {
667 MonoType *inflated = verifier_inflate_type (ctx, &(*candidate_class)->byval_arg, ctx->generic_context);
670 cc = mono_class_from_mono_type (inflated);
671 mono_metadata_free_type (inflated);
673 if (mono_type_is_reference (&cc->byval_arg) && !MONO_CLASS_IS_INTERFACE (cc))
674 class_constraint_satisfied = TRUE;
675 else if (!mono_type_is_reference (&cc->byval_arg) && !MONO_CLASS_IS_INTERFACE (cc))
676 valuetype_constraint_satisfied = TRUE;
679 class_constraint_satisfied |= (cmask & GENERIC_PARAMETER_ATTRIBUTE_REFERENCE_TYPE_CONSTRAINT) != 0;
680 valuetype_constraint_satisfied |= (cmask & GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT) != 0;
682 if ((tmask & GENERIC_PARAMETER_ATTRIBUTE_REFERENCE_TYPE_CONSTRAINT) && !class_constraint_satisfied)
684 if ((tmask & GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT) && !valuetype_constraint_satisfied)
686 if ((tmask & GENERIC_PARAMETER_ATTRIBUTE_CONSTRUCTOR_CONSTRAINT) && !((cmask & GENERIC_PARAMETER_ATTRIBUTE_CONSTRUCTOR_CONSTRAINT) ||
687 valuetype_constraint_satisfied)) {
692 if (tinfo->constraints) {
693 MonoClass **target_class;
694 for (target_class = tinfo->constraints; *target_class; ++target_class) {
696 MonoType *inflated = verifier_inflate_type (ctx, &(*target_class)->byval_arg, context);
699 tc = mono_class_from_mono_type (inflated);
700 mono_metadata_free_type (inflated);
703 * A constraint from @target might inflate into @candidate itself and in that case we don't need
704 * check it's constraints since it satisfy the constraint by itself.
706 if (mono_metadata_type_equal (&tc->byval_arg, &candidate_param_class->byval_arg))
709 if (!cinfo->constraints)
712 for (candidate_class = cinfo->constraints; *candidate_class; ++candidate_class) {
714 inflated = verifier_inflate_type (ctx, &(*candidate_class)->byval_arg, ctx->generic_context);
717 cc = mono_class_from_mono_type (inflated);
718 mono_metadata_free_type (inflated);
720 if (verifier_class_is_assignable_from (tc, cc))
724 * This happens when we have the following:
726 * Bar<K> where K : IFace
727 * Foo<T, U> where T : U where U : IFace
729 * Bar<T> <- T here satisfy K constraint transitively through to U's constraint
732 if (mono_type_is_generic_argument (&cc->byval_arg)) {
733 MonoGenericParam *other_candidate = verifier_get_generic_param_from_type (ctx, &cc->byval_arg);
735 if (mono_generic_param_is_constraint_compatible (ctx, target, other_candidate, cc, context)) {
740 if (!*candidate_class)
747 static MonoGenericParam*
748 verifier_get_generic_param_from_type (VerifyContext *ctx, MonoType *type)
750 MonoGenericContainer *gc;
751 MonoMethod *method = ctx->method;
754 num = mono_type_get_generic_param_num (type);
756 if (type->type == MONO_TYPE_VAR) {
757 MonoClass *gtd = method->klass;
758 if (mono_class_is_ginst (gtd))
759 gtd = mono_class_get_generic_class (gtd)->container_class;
760 gc = mono_class_try_get_generic_container (gtd);
762 MonoMethod *gmd = method;
763 if (method->is_inflated)
764 gmd = ((MonoMethodInflated*)method)->declaring;
765 gc = mono_method_get_generic_container (gmd);
769 return mono_generic_container_get_param (gc, num);
775 * Verify if @type is valid for the given @ctx verification context.
776 * this function checks for VAR and MVAR types that are invalid under the current verifier,
777 * This means that it either
780 is_valid_type_in_context (VerifyContext *ctx, MonoType *type)
782 return mono_type_is_valid_type_in_context (type, ctx->generic_context);
786 is_valid_generic_instantiation_in_context (VerifyContext *ctx, MonoGenericInst *ginst, gboolean check_gtd)
789 for (i = 0; i < ginst->type_argc; ++i) {
790 MonoType *type = ginst->type_argv [i];
792 if (!mono_type_is_valid_type_in_context_full (type, ctx->generic_context, TRUE))
799 generic_arguments_respect_constraints (VerifyContext *ctx, MonoGenericContainer *gc, MonoGenericContext *context, MonoGenericInst *ginst)
802 for (i = 0; i < ginst->type_argc; ++i) {
803 MonoType *type = ginst->type_argv [i];
804 MonoGenericParam *target = mono_generic_container_get_param (gc, i);
805 MonoGenericParam *candidate;
806 MonoClass *candidate_class;
808 if (!mono_type_is_generic_argument (type))
811 if (!is_valid_type_in_context (ctx, type))
814 candidate = verifier_get_generic_param_from_type (ctx, type);
815 candidate_class = mono_class_from_mono_type (type);
817 if (!mono_generic_param_is_constraint_compatible (ctx, target, candidate, candidate_class, context))
824 mono_method_repect_method_constraints (VerifyContext *ctx, MonoMethod *method)
826 MonoMethodInflated *gmethod = (MonoMethodInflated *)method;
827 MonoGenericInst *ginst = gmethod->context.method_inst;
828 MonoGenericContainer *gc = mono_method_get_generic_container (gmethod->declaring);
829 return !gc || generic_arguments_respect_constraints (ctx, gc, &gmethod->context, ginst);
833 mono_class_repect_method_constraints (VerifyContext *ctx, MonoClass *klass)
835 MonoGenericClass *gklass = mono_class_get_generic_class (klass);
836 MonoGenericInst *ginst = gklass->context.class_inst;
837 MonoGenericContainer *gc = mono_class_get_generic_container (gklass->container_class);
838 return !gc || generic_arguments_respect_constraints (ctx, gc, &gklass->context, ginst);
842 mono_method_is_valid_generic_instantiation (VerifyContext *ctx, MonoMethod *method)
844 MonoMethodInflated *gmethod = (MonoMethodInflated *)method;
845 MonoGenericInst *ginst = gmethod->context.method_inst;
846 MonoGenericContainer *gc = mono_method_get_generic_container (gmethod->declaring);
847 if (!gc) /*non-generic inflated method - it's part of a generic type */
849 if (ctx && !is_valid_generic_instantiation_in_context (ctx, ginst, TRUE))
851 return is_valid_generic_instantiation (gc, &gmethod->context, ginst);
856 mono_class_is_valid_generic_instantiation (VerifyContext *ctx, MonoClass *klass)
858 MonoGenericClass *gklass = mono_class_get_generic_class (klass);
859 MonoGenericInst *ginst = gklass->context.class_inst;
860 MonoGenericContainer *gc = mono_class_get_generic_container (gklass->container_class);
861 if (ctx && !is_valid_generic_instantiation_in_context (ctx, ginst, TRUE))
863 return is_valid_generic_instantiation (gc, &gklass->context, ginst);
867 mono_type_is_valid_in_context (VerifyContext *ctx, MonoType *type)
872 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid null type at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
876 if (!is_valid_type_in_context (ctx, type)) {
877 char *str = mono_type_full_name (type);
878 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid generic type (%s%s) (argument out of range or %s is not generic) at 0x%04x",
879 str [0] == '!' ? "" : type->type == MONO_TYPE_VAR ? "!" : "!!",
881 type->type == MONO_TYPE_VAR ? "class" : "method",
883 MONO_EXCEPTION_BAD_IMAGE);
888 klass = mono_class_from_mono_type (type);
889 mono_class_init (klass);
890 if (mono_class_has_failure (klass)) {
891 if (mono_class_is_ginst (klass) && !mono_class_is_valid_generic_instantiation (NULL, klass))
892 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);
894 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);
898 if (mono_class_is_ginst (klass) && mono_class_has_failure (mono_class_get_generic_class (klass)->container_class)) {
899 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);
903 if (!mono_class_is_ginst (klass))
906 if (!mono_class_is_valid_generic_instantiation (ctx, klass)) {
907 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);
911 if (!mono_class_repect_method_constraints (ctx, klass)) {
912 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);
919 static verify_result_t
920 mono_method_is_valid_in_context (VerifyContext *ctx, MonoMethod *method)
922 if (!mono_type_is_valid_in_context (ctx, &method->klass->byval_arg))
923 return RESULT_INVALID;
925 if (!method->is_inflated)
928 if (!mono_method_is_valid_generic_instantiation (ctx, method)) {
929 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);
930 return RESULT_INVALID;
933 if (!mono_method_repect_method_constraints (ctx, method)) {
934 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));
935 return RESULT_UNVERIFIABLE;
941 static MonoClassField*
942 verifier_load_field (VerifyContext *ctx, int token, MonoClass **out_klass, const char *opcode) {
944 MonoClassField *field;
945 MonoClass *klass = NULL;
947 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
948 field = (MonoClassField *)mono_method_get_wrapper_data (ctx->method, (guint32)token);
949 klass = field ? field->parent : NULL;
951 if (!IS_FIELD_DEF_OR_REF (token) || !token_bounds_check (ctx->image, token)) {
952 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);
956 field = mono_field_from_token_checked (ctx->image, token, &klass, ctx->generic_context, &error);
957 mono_error_cleanup (&error); /*FIXME don't swallow the error */
960 if (!field || !field->parent || !klass) {
961 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);
965 if (!mono_type_is_valid_in_context (ctx, &klass->byval_arg))
968 if (mono_field_get_flags (field) & FIELD_ATTRIBUTE_LITERAL) {
969 char *type_name = mono_type_get_full_name (field->parent);
970 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot reference literal field %s::%s at 0x%04x", type_name, field->name, ctx->ip_offset));
980 verifier_load_method (VerifyContext *ctx, int token, const char *opcode) {
984 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
985 method = (MonoMethod *)mono_method_get_wrapper_data (ctx->method, (guint32)token);
988 if (!IS_METHOD_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
989 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);
993 method = mono_get_method_checked (ctx->image, token, NULL, ctx->generic_context, &error);
994 mono_error_cleanup (&error); /* FIXME don't swallow this error */
998 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);
1002 if (mono_method_is_valid_in_context (ctx, method) == RESULT_INVALID)
1009 verifier_load_type (VerifyContext *ctx, int token, const char *opcode) {
1012 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
1013 MonoClass *klass = (MonoClass *)mono_method_get_wrapper_data (ctx->method, (guint32)token);
1014 type = klass ? &klass->byval_arg : NULL;
1017 if (!IS_TYPE_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
1018 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid type token 0x%08x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
1021 type = mono_type_get_checked (ctx->image, token, ctx->generic_context, &error);
1022 mono_error_cleanup (&error); /*FIXME don't swallow the error */
1026 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);
1030 if (!mono_type_is_valid_in_context (ctx, type))
1037 /* stack_slot_get_type:
1039 * Returns the stack type of @value. This value includes POINTER_MASK.
1041 * Use this function to checks that account for a managed pointer.
1044 stack_slot_get_type (ILStackDesc *value)
1046 return value->stype & RAW_TYPE_MASK;
1049 /* stack_slot_get_underlying_type:
1051 * Returns the stack type of @value. This value does not include POINTER_MASK.
1053 * Use this function is cases where the fact that the value could be a managed pointer is
1054 * irrelevant. For example, field load doesn't care about this fact of type on stack.
1057 stack_slot_get_underlying_type (ILStackDesc *value)
1059 return value->stype & TYPE_MASK;
1062 /* stack_slot_is_managed_pointer:
1064 * Returns TRUE is @value is a managed pointer.
1067 stack_slot_is_managed_pointer (ILStackDesc *value)
1069 return (value->stype & POINTER_MASK) == POINTER_MASK;
1072 /* stack_slot_is_managed_mutability_pointer:
1074 * Returns TRUE is @value is a managed mutability pointer.
1076 static G_GNUC_UNUSED gboolean
1077 stack_slot_is_managed_mutability_pointer (ILStackDesc *value)
1079 return (value->stype & CMMP_MASK) == CMMP_MASK;
1082 /* stack_slot_is_null_literal:
1084 * Returns TRUE is @value is the null literal.
1087 stack_slot_is_null_literal (ILStackDesc *value)
1089 return (value->stype & NULL_LITERAL_MASK) == NULL_LITERAL_MASK;
1093 /* stack_slot_is_this_pointer:
1095 * Returns TRUE is @value is the this literal
1098 stack_slot_is_this_pointer (ILStackDesc *value)
1100 return (value->stype & THIS_POINTER_MASK) == THIS_POINTER_MASK;
1103 /* stack_slot_is_boxed_value:
1105 * Returns TRUE is @value is a boxed value
1108 stack_slot_is_boxed_value (ILStackDesc *value)
1110 return (value->stype & BOXED_MASK) == BOXED_MASK;
1114 stack_slot_get_name (ILStackDesc *value)
1116 return type_names [value->stype & TYPE_MASK];
1119 #define APPEND_WITH_PREDICATE(PRED,NAME) do {\
1120 if (PRED (value)) { \
1122 g_string_append (str, ", "); \
1123 g_string_append (str, NAME); \
1128 stack_slot_stack_type_full_name (ILStackDesc *value)
1130 GString *str = g_string_new ("");
1132 gboolean has_pred = FALSE, first = TRUE;
1134 if ((value->stype & TYPE_MASK) != value->stype) {
1135 g_string_append(str, "[");
1136 APPEND_WITH_PREDICATE (stack_slot_is_this_pointer, "this");
1137 APPEND_WITH_PREDICATE (stack_slot_is_boxed_value, "boxed");
1138 APPEND_WITH_PREDICATE (stack_slot_is_null_literal, "null");
1139 APPEND_WITH_PREDICATE (stack_slot_is_managed_mutability_pointer, "cmmp");
1140 APPEND_WITH_PREDICATE (stack_slot_is_managed_pointer, "mp");
1144 if (mono_type_is_generic_argument (value->type) && !stack_slot_is_boxed_value (value)) {
1146 g_string_append(str, "[");
1148 g_string_append (str, ", ");
1149 g_string_append (str, "unboxed");
1154 g_string_append(str, "] ");
1156 g_string_append (str, stack_slot_get_name (value));
1158 g_string_free (str, FALSE);
1163 stack_slot_full_name (ILStackDesc *value)
1165 char *type_name = mono_type_full_name (value->type);
1166 char *stack_name = stack_slot_stack_type_full_name (value);
1167 char *res = g_strdup_printf ("%s (%s)", type_name, stack_name);
1169 g_free (stack_name);
1173 //////////////////////////////////////////////////////////////////
1175 mono_free_verify_list (GSList *list)
1177 MonoVerifyInfoExtended *info;
1180 for (tmp = list; tmp; tmp = tmp->next) {
1181 info = (MonoVerifyInfoExtended *)tmp->data;
1182 g_free (info->info.message);
1185 g_slist_free (list);
1188 #define ADD_ERROR(list,msg) \
1190 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1191 vinfo->info.status = MONO_VERIFY_ERROR; \
1192 vinfo->info.message = (msg); \
1193 (list) = g_slist_prepend ((list), vinfo); \
1196 #define ADD_WARN(list,code,msg) \
1198 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1199 vinfo->info.status = (code); \
1200 vinfo->info.message = (msg); \
1201 (list) = g_slist_prepend ((list), vinfo); \
1204 #define ADD_INVALID(list,msg) \
1206 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1207 vinfo->status = MONO_VERIFY_ERROR; \
1208 vinfo->message = (msg); \
1209 (list) = g_slist_prepend ((list), vinfo); \
1210 /*G_BREAKPOINT ();*/ \
1214 #define CHECK_STACK_UNDERFLOW(num) \
1216 if (cur_stack < (num)) \
1217 ADD_INVALID (list, g_strdup_printf ("Stack underflow at 0x%04x (%d items instead of %d)", ip_offset, cur_stack, (num))); \
1220 #define CHECK_STACK_OVERFLOW() \
1222 if (cur_stack >= max_stack) \
1223 ADD_INVALID (list, g_strdup_printf ("Maxstack exceeded at 0x%04x", ip_offset)); \
1228 in_any_block (MonoMethodHeader *header, guint offset)
1231 MonoExceptionClause *clause;
1233 for (i = 0; i < header->num_clauses; ++i) {
1234 clause = &header->clauses [i];
1235 if (MONO_OFFSET_IN_CLAUSE (clause, offset))
1237 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1239 if (MONO_OFFSET_IN_FILTER (clause, offset))
1246 * in_any_exception_block:
1248 * Returns TRUE is @offset is part of any exception clause (filter, handler, catch, finally or fault).
1251 in_any_exception_block (MonoMethodHeader *header, guint offset)
1254 MonoExceptionClause *clause;
1256 for (i = 0; i < header->num_clauses; ++i) {
1257 clause = &header->clauses [i];
1258 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1260 if (MONO_OFFSET_IN_FILTER (clause, offset))
1267 * is_valid_branch_instruction:
1269 * Verify if it's valid to perform a branch from @offset to @target.
1270 * This should be used with br and brtrue/false.
1271 * It returns 0 if valid, 1 for unverifiable and 2 for invalid.
1272 * The major difference from other similiar functions is that branching into a
1273 * finally/fault block is invalid instead of just unverifiable.
1276 is_valid_branch_instruction (MonoMethodHeader *header, guint offset, guint target)
1279 MonoExceptionClause *clause;
1281 for (i = 0; i < header->num_clauses; ++i) {
1282 clause = &header->clauses [i];
1283 /*branching into a finally block is invalid*/
1284 if ((clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY || clause->flags == MONO_EXCEPTION_CLAUSE_FAULT) &&
1285 !MONO_OFFSET_IN_HANDLER (clause, offset) &&
1286 MONO_OFFSET_IN_HANDLER (clause, target))
1289 if (clause->try_offset != target && (MONO_OFFSET_IN_CLAUSE (clause, offset) ^ MONO_OFFSET_IN_CLAUSE (clause, target)))
1291 if (MONO_OFFSET_IN_HANDLER (clause, offset) ^ MONO_OFFSET_IN_HANDLER (clause, target))
1293 if (MONO_OFFSET_IN_FILTER (clause, offset) ^ MONO_OFFSET_IN_FILTER (clause, target))
1300 * is_valid_cmp_branch_instruction:
1302 * Verify if it's valid to perform a branch from @offset to @target.
1303 * This should be used with binary comparison branching instruction, like beq, bge and similars.
1304 * It returns 0 if valid, 1 for unverifiable and 2 for invalid.
1306 * The major differences from other similar functions are that most errors lead to invalid
1307 * code and only branching out of finally, filter or fault clauses is unverifiable.
1310 is_valid_cmp_branch_instruction (MonoMethodHeader *header, guint offset, guint target)
1313 MonoExceptionClause *clause;
1315 for (i = 0; i < header->num_clauses; ++i) {
1316 clause = &header->clauses [i];
1317 /*branching out of a handler or finally*/
1318 if (clause->flags != MONO_EXCEPTION_CLAUSE_NONE &&
1319 MONO_OFFSET_IN_HANDLER (clause, offset) &&
1320 !MONO_OFFSET_IN_HANDLER (clause, target))
1323 if (clause->try_offset != target && (MONO_OFFSET_IN_CLAUSE (clause, offset) ^ MONO_OFFSET_IN_CLAUSE (clause, target)))
1325 if (MONO_OFFSET_IN_HANDLER (clause, offset) ^ MONO_OFFSET_IN_HANDLER (clause, target))
1327 if (MONO_OFFSET_IN_FILTER (clause, offset) ^ MONO_OFFSET_IN_FILTER (clause, target))
1334 * A leave can't escape a finally block
1337 is_correct_leave (MonoMethodHeader *header, guint offset, guint target)
1340 MonoExceptionClause *clause;
1342 for (i = 0; i < header->num_clauses; ++i) {
1343 clause = &header->clauses [i];
1344 if (clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY && MONO_OFFSET_IN_HANDLER (clause, offset) && !MONO_OFFSET_IN_HANDLER (clause, target))
1346 if (MONO_OFFSET_IN_FILTER (clause, offset))
1353 * A rethrow can't happen outside of a catch handler.
1356 is_correct_rethrow (MonoMethodHeader *header, guint offset)
1359 MonoExceptionClause *clause;
1361 for (i = 0; i < header->num_clauses; ++i) {
1362 clause = &header->clauses [i];
1363 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1370 * An endfinally can't happen outside of a finally/fault handler.
1373 is_correct_endfinally (MonoMethodHeader *header, guint offset)
1376 MonoExceptionClause *clause;
1378 for (i = 0; i < header->num_clauses; ++i) {
1379 clause = &header->clauses [i];
1380 if (MONO_OFFSET_IN_HANDLER (clause, offset) && (clause->flags == MONO_EXCEPTION_CLAUSE_FAULT || clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY))
1388 * An endfilter can only happens inside a filter clause.
1389 * In non-strict mode filter is allowed inside the handler clause too
1391 static MonoExceptionClause *
1392 is_correct_endfilter (VerifyContext *ctx, guint offset)
1395 MonoExceptionClause *clause;
1397 for (i = 0; i < ctx->header->num_clauses; ++i) {
1398 clause = &ctx->header->clauses [i];
1399 if (clause->flags != MONO_EXCEPTION_CLAUSE_FILTER)
1401 if (MONO_OFFSET_IN_FILTER (clause, offset))
1403 if (!IS_STRICT_MODE (ctx) && MONO_OFFSET_IN_HANDLER (clause, offset))
1411 * Non-strict endfilter can happens inside a try block or any handler block
1414 is_unverifiable_endfilter (VerifyContext *ctx, guint offset)
1417 MonoExceptionClause *clause;
1419 for (i = 0; i < ctx->header->num_clauses; ++i) {
1420 clause = &ctx->header->clauses [i];
1421 if (MONO_OFFSET_IN_CLAUSE (clause, offset))
1428 is_valid_bool_arg (ILStackDesc *arg)
1430 if (stack_slot_is_managed_pointer (arg) || stack_slot_is_boxed_value (arg) || stack_slot_is_null_literal (arg))
1434 switch (stack_slot_get_underlying_type (arg)) {
1437 case TYPE_NATIVE_INT:
1441 g_assert (arg->type);
1442 switch (arg->type->type) {
1443 case MONO_TYPE_CLASS:
1444 case MONO_TYPE_STRING:
1445 case MONO_TYPE_OBJECT:
1446 case MONO_TYPE_SZARRAY:
1447 case MONO_TYPE_ARRAY:
1448 case MONO_TYPE_FNPTR:
1451 case MONO_TYPE_GENERICINST:
1452 /*We need to check if the container class
1453 * of the generic type is a valuetype, iow:
1454 * is it a "class Foo<T>" or a "struct Foo<T>"?
1456 return !arg->type->data.generic_class->container_class->valuetype;
1466 /*Type manipulation helper*/
1468 /*Returns the byref version of the supplied MonoType*/
1470 mono_type_get_type_byref (MonoType *type)
1474 return &mono_class_from_mono_type (type)->this_arg;
1478 /*Returns the byval version of the supplied MonoType*/
1480 mono_type_get_type_byval (MonoType *type)
1484 return &mono_class_from_mono_type (type)->byval_arg;
1488 mono_type_from_stack_slot (ILStackDesc *slot)
1490 if (stack_slot_is_managed_pointer (slot))
1491 return mono_type_get_type_byref (slot->type);
1495 /*Stack manipulation code*/
1498 ensure_stack_size (ILCodeDesc *stack, int required)
1503 if (required < stack->max_size)
1506 /* We don't have to worry about the exponential growth since stack_copy prune unused space */
1507 new_size = MAX (8, MAX (required, stack->max_size * 2));
1509 g_assert (new_size >= stack->size);
1510 g_assert (new_size >= required);
1512 tmp = g_new0 (ILStackDesc, new_size);
1513 _MEM_ALLOC (sizeof (ILStackDesc) * new_size);
1517 memcpy (tmp, stack->stack, stack->size * sizeof (ILStackDesc));
1518 g_free (stack->stack);
1519 _MEM_FREE (sizeof (ILStackDesc) * stack->max_size);
1523 stack->max_size = new_size;
1527 stack_init (VerifyContext *ctx, ILCodeDesc *state)
1529 if (state->flags & IL_CODE_FLAG_STACK_INITED)
1531 state->size = state->max_size = 0;
1532 state->flags |= IL_CODE_FLAG_STACK_INITED;
1536 stack_copy (ILCodeDesc *to, ILCodeDesc *from)
1538 ensure_stack_size (to, from->size);
1539 to->size = from->size;
1541 /*stack copy happens at merge points, which have small stacks*/
1543 memcpy (to->stack, from->stack, sizeof (ILStackDesc) * from->size);
1547 copy_stack_value (ILStackDesc *to, ILStackDesc *from)
1549 to->stype = from->stype;
1550 to->type = from->type;
1551 to->method = from->method;
1555 check_underflow (VerifyContext *ctx, int size)
1557 if (ctx->eval.size < size) {
1558 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack underflow, required %d, but have %d at 0x%04x", size, ctx->eval.size, ctx->ip_offset));
1565 check_overflow (VerifyContext *ctx)
1567 if (ctx->eval.size >= ctx->max_stack) {
1568 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have stack-depth %d at 0x%04x", ctx->eval.size + 1, ctx->ip_offset));
1574 /*This reject out PTR, FNPTR and TYPEDBYREF*/
1576 check_unmanaged_pointer (VerifyContext *ctx, ILStackDesc *value)
1578 if (stack_slot_get_type (value) == TYPE_PTR) {
1579 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unmanaged pointer is not a verifiable type at 0x%04x", ctx->ip_offset));
1585 /*TODO verify if MONO_TYPE_TYPEDBYREF is not allowed here as well.*/
1587 check_unverifiable_type (VerifyContext *ctx, MonoType *type)
1589 if (type->type == MONO_TYPE_PTR || type->type == MONO_TYPE_FNPTR) {
1590 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unmanaged pointer is not a verifiable type at 0x%04x", ctx->ip_offset));
1596 static ILStackDesc *
1597 stack_push (VerifyContext *ctx)
1599 g_assert (ctx->eval.size < ctx->max_stack);
1600 g_assert (ctx->eval.size <= ctx->eval.max_size);
1602 ensure_stack_size (&ctx->eval, ctx->eval.size + 1);
1604 return & ctx->eval.stack [ctx->eval.size++];
1607 static ILStackDesc *
1608 stack_push_val (VerifyContext *ctx, int stype, MonoType *type)
1610 ILStackDesc *top = stack_push (ctx);
1616 static ILStackDesc *
1617 stack_pop (VerifyContext *ctx)
1620 g_assert (ctx->eval.size > 0);
1621 ret = ctx->eval.stack + --ctx->eval.size;
1622 if ((ret->stype & UNINIT_THIS_MASK) == UNINIT_THIS_MASK)
1623 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Found use of uninitialized 'this ptr' ref at 0x%04x", ctx->ip_offset));
1627 /* This function allows to safely pop an unititialized this ptr from
1628 * the eval stack without marking the method as unverifiable.
1630 static ILStackDesc *
1631 stack_pop_safe (VerifyContext *ctx)
1633 g_assert (ctx->eval.size > 0);
1634 return ctx->eval.stack + --ctx->eval.size;
1637 /*Positive number distance from stack top. [0] is stack top, [1] is the one below*/
1639 stack_peek (VerifyContext *ctx, int distance)
1641 g_assert (ctx->eval.size - distance > 0);
1642 return ctx->eval.stack + (ctx->eval.size - 1 - distance);
1645 static ILStackDesc *
1646 stack_push_stack_val (VerifyContext *ctx, ILStackDesc *value)
1648 ILStackDesc *top = stack_push (ctx);
1649 copy_stack_value (top, value);
1653 /* Returns the MonoType associated with the token, or NULL if it is invalid.
1655 * A boxable type can be either a reference or value type, but cannot be a byref type or an unmanaged pointer
1658 get_boxable_mono_type (VerifyContext* ctx, int token, const char *opcode)
1663 if (!(type = verifier_load_type (ctx, token, opcode)))
1666 if (type->byref && type->type != MONO_TYPE_TYPEDBYREF) {
1667 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of byref type for %s at 0x%04x", opcode, ctx->ip_offset));
1671 if (type->type == MONO_TYPE_VOID) {
1672 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of void type for %s at 0x%04x", opcode, ctx->ip_offset));
1676 if (type->type == MONO_TYPE_TYPEDBYREF)
1677 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid use of typedbyref for %s at 0x%04x", opcode, ctx->ip_offset));
1679 if (!(klass = mono_class_from_mono_type (type)))
1680 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Could not retrieve type token for %s at 0x%04x", opcode, ctx->ip_offset));
1682 if (mono_class_is_gtd (klass) && type->type != MONO_TYPE_GENERICINST)
1683 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));
1685 check_unverifiable_type (ctx, type);
1690 /*operation result tables */
1692 static const unsigned char bin_op_table [TYPE_MAX][TYPE_MAX] = {
1693 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1694 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1695 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1696 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
1697 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1698 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1701 static const unsigned char add_table [TYPE_MAX][TYPE_MAX] = {
1702 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1703 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1704 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1705 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
1706 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_INV, TYPE_INV},
1707 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1710 static const unsigned char sub_table [TYPE_MAX][TYPE_MAX] = {
1711 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1712 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1713 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1714 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
1715 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_NATIVE_INT | NON_VERIFIABLE_RESULT, TYPE_INV},
1716 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1719 static const unsigned char int_bin_op_table [TYPE_MAX][TYPE_MAX] = {
1720 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1721 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1722 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, 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},
1725 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1728 static const unsigned char shift_op_table [TYPE_MAX][TYPE_MAX] = {
1729 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1730 {TYPE_I8, TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV},
1731 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1732 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1733 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1734 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1737 static const unsigned char cmp_br_op [TYPE_MAX][TYPE_MAX] = {
1738 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1739 {TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1740 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1741 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV},
1742 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV},
1743 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1746 static const unsigned char cmp_br_eq_op [TYPE_MAX][TYPE_MAX] = {
1747 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1748 {TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1749 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_I4 | NON_VERIFIABLE_RESULT, TYPE_INV},
1750 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV},
1751 {TYPE_INV, TYPE_INV, TYPE_I4 | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_I4, TYPE_INV},
1752 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4},
1755 static const unsigned char add_ovf_un_table [TYPE_MAX][TYPE_MAX] = {
1756 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1757 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1758 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1759 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1760 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_INV, TYPE_INV},
1761 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1764 static const unsigned char sub_ovf_un_table [TYPE_MAX][TYPE_MAX] = {
1765 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1766 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1767 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1768 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1769 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_NATIVE_INT | NON_VERIFIABLE_RESULT, TYPE_INV},
1770 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1773 static const unsigned char bin_ovf_table [TYPE_MAX][TYPE_MAX] = {
1774 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1775 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1776 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1777 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1778 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1779 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1782 #ifdef MONO_VERIFIER_DEBUG
1786 dump_stack_value (ILStackDesc *value)
1788 printf ("[(%x)(%x)", value->type->type, value->stype);
1790 if (stack_slot_is_this_pointer (value))
1793 if (stack_slot_is_boxed_value (value))
1794 printf ("[boxed] ");
1796 if (stack_slot_is_null_literal (value))
1799 if (stack_slot_is_managed_mutability_pointer (value))
1800 printf ("Controled Mutability MP: ");
1802 if (stack_slot_is_managed_pointer (value))
1803 printf ("Managed Pointer to: ");
1805 switch (stack_slot_get_underlying_type (value)) {
1807 printf ("invalid type]");
1815 case TYPE_NATIVE_INT:
1816 printf ("native int]");
1819 printf ("float64]");
1822 printf ("unmanaged pointer]");
1825 switch (value->type->type) {
1826 case MONO_TYPE_CLASS:
1827 case MONO_TYPE_VALUETYPE:
1828 printf ("complex] (%s)", value->type->data.klass->name);
1830 case MONO_TYPE_STRING:
1831 printf ("complex] (string)");
1833 case MONO_TYPE_OBJECT:
1834 printf ("complex] (object)");
1836 case MONO_TYPE_SZARRAY:
1837 printf ("complex] (%s [])", value->type->data.klass->name);
1839 case MONO_TYPE_ARRAY:
1840 printf ("complex] (%s [%d %d %d])",
1841 value->type->data.array->eklass->name,
1842 value->type->data.array->rank,
1843 value->type->data.array->numsizes,
1844 value->type->data.array->numlobounds);
1846 case MONO_TYPE_GENERICINST:
1847 printf ("complex] (inst of %s )", value->type->data.generic_class->container_class->name);
1850 printf ("complex] (type generic param !%d - %s) ", value->type->data.generic_param->num, mono_generic_param_info (value->type->data.generic_param)->name);
1852 case MONO_TYPE_MVAR:
1853 printf ("complex] (method generic param !!%d - %s) ", value->type->data.generic_param->num, mono_generic_param_info (value->type->data.generic_param)->name);
1856 //should be a boxed value
1857 char * name = mono_type_full_name (value->type);
1858 printf ("complex] %s", name);
1864 printf ("unknown stack %x type]\n", value->stype);
1865 g_assert_not_reached ();
1870 dump_stack_state (ILCodeDesc *state)
1874 printf ("(%d) ", state->size);
1875 for (i = 0; i < state->size; ++i)
1876 dump_stack_value (state->stack + i);
1882 * is_array_type_compatible:
1884 * Returns TRUE if candidate array type can be assigned to target.
1886 * Both parameters MUST be of type MONO_TYPE_ARRAY (target->type == MONO_TYPE_ARRAY)
1889 is_array_type_compatible (MonoType *target, MonoType *candidate)
1891 MonoArrayType *left = target->data.array;
1892 MonoArrayType *right = candidate->data.array;
1894 g_assert (target->type == MONO_TYPE_ARRAY);
1895 g_assert (candidate->type == MONO_TYPE_ARRAY);
1897 if (left->rank != right->rank)
1900 return verifier_class_is_assignable_from (left->eklass, right->eklass);
1904 get_stack_type (MonoType *type)
1907 int type_kind = type->type;
1909 mask = POINTER_MASK;
1910 /*TODO handle CMMP_MASK */
1913 switch (type_kind) {
1916 case MONO_TYPE_BOOLEAN:
1919 case MONO_TYPE_CHAR:
1922 return TYPE_I4 | mask;
1926 return TYPE_NATIVE_INT | mask;
1928 /* FIXME: the spec says that you cannot have a pointer to method pointer, do we need to check this here? */
1929 case MONO_TYPE_FNPTR:
1931 case MONO_TYPE_TYPEDBYREF:
1932 return TYPE_PTR | mask;
1935 case MONO_TYPE_MVAR:
1937 case MONO_TYPE_CLASS:
1938 case MONO_TYPE_STRING:
1939 case MONO_TYPE_OBJECT:
1940 case MONO_TYPE_SZARRAY:
1941 case MONO_TYPE_ARRAY:
1942 return TYPE_COMPLEX | mask;
1946 return TYPE_I8 | mask;
1950 return TYPE_R8 | mask;
1952 case MONO_TYPE_GENERICINST:
1953 case MONO_TYPE_VALUETYPE:
1954 if (mono_type_is_enum_type (type)) {
1955 type = mono_type_get_underlying_type_any (type);
1958 type_kind = type->type;
1961 return TYPE_COMPLEX | mask;
1969 /* convert MonoType to ILStackDesc format (stype) */
1971 set_stack_value (VerifyContext *ctx, ILStackDesc *stack, MonoType *type, int take_addr)
1974 int type_kind = type->type;
1976 if (type->byref || take_addr)
1977 mask = POINTER_MASK;
1978 /* TODO handle CMMP_MASK */
1983 switch (type_kind) {
1986 case MONO_TYPE_BOOLEAN:
1989 case MONO_TYPE_CHAR:
1992 stack->stype = TYPE_I4 | mask;
1996 stack->stype = TYPE_NATIVE_INT | mask;
1999 /*FIXME: Do we need to check if it's a pointer to the method pointer? The spec says it' illegal to have that.*/
2000 case MONO_TYPE_FNPTR:
2002 case MONO_TYPE_TYPEDBYREF:
2003 stack->stype = TYPE_PTR | mask;
2006 case MONO_TYPE_CLASS:
2007 case MONO_TYPE_STRING:
2008 case MONO_TYPE_OBJECT:
2009 case MONO_TYPE_SZARRAY:
2010 case MONO_TYPE_ARRAY:
2013 case MONO_TYPE_MVAR:
2014 stack->stype = TYPE_COMPLEX | mask;
2019 stack->stype = TYPE_I8 | mask;
2023 stack->stype = TYPE_R8 | mask;
2025 case MONO_TYPE_GENERICINST:
2026 case MONO_TYPE_VALUETYPE:
2027 if (mono_type_is_enum_type (type)) {
2028 MonoType *utype = mono_type_get_underlying_type_any (type);
2030 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Could not resolve underlying type of %x at %d", type->type, ctx->ip_offset));
2034 type_kind = type->type;
2037 stack->stype = TYPE_COMPLEX | mask;
2041 VERIFIER_DEBUG ( printf ("unknown type 0x%02x in eval stack type\n", type->type); );
2042 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Illegal value set on stack 0x%02x at %d", type->type, ctx->ip_offset));
2049 * init_stack_with_value_at_exception_boundary:
2051 * Initialize the stack and push a given type.
2052 * The instruction is marked as been on the exception boundary.
2055 init_stack_with_value_at_exception_boundary (VerifyContext *ctx, ILCodeDesc *code, MonoClass *klass)
2058 MonoType *type = mono_class_inflate_generic_type_checked (&klass->byval_arg, ctx->generic_context, &error);
2060 if (!mono_error_ok (&error)) {
2061 char *name = mono_type_get_full_name (klass);
2062 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid class %s used for exception", name));
2064 mono_error_cleanup (&error);
2068 if (!ctx->max_stack) {
2069 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack overflow at 0x%04x", ctx->ip_offset));
2073 stack_init (ctx, code);
2074 ensure_stack_size (code, 1);
2075 set_stack_value (ctx, code->stack, type, FALSE);
2076 ctx->exception_types = g_slist_prepend (ctx->exception_types, type);
2078 code->flags |= IL_CODE_FLAG_WAS_TARGET;
2079 if (mono_type_is_generic_argument (type))
2080 code->stack->stype |= BOXED_MASK;
2082 /* Class lazy loading functions */
2083 static GENERATE_GET_CLASS_WITH_CACHE (ienumerable, System.Collections.Generic, IEnumerable`1)
2084 static GENERATE_GET_CLASS_WITH_CACHE (icollection, System.Collections.Generic, ICollection`1)
2085 static GENERATE_GET_CLASS_WITH_CACHE (ireadonly_list, System.Collections.Generic, IReadOnlyList`1)
2086 static GENERATE_GET_CLASS_WITH_CACHE (ireadonly_collection, System.Collections.Generic, IReadOnlyCollection`1)
2090 get_ienumerable_class (void)
2092 return mono_class_get_ienumerable_class ();
2096 get_icollection_class (void)
2098 return mono_class_get_icollection_class ();
2102 get_ireadonlylist_class (void)
2104 return mono_class_get_ireadonly_list_class ();
2108 get_ireadonlycollection_class (void)
2110 return mono_class_get_ireadonly_collection_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) || !mono_class_is_ginst (target) || candidate->rank != 1)
2195 iface_gtd = mono_class_get_generic_class (target)->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 (mono_class_get_generic_class (target)->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 (klass = mono_generic_param_info (param)->constraints; klass && *klass; ++klass) {
2444 if (recursive_boxed_constraint_type_check (ctx, type, *klass, 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 (klass = mono_generic_param_info (param)->constraints; klass && *klass; ++klass) {
2477 /*256 should be enough since there can't be more than 255 generic arguments.*/
2478 if (recursive_boxed_constraint_type_check (ctx, type, *klass, 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 /* Handle how Roslyn emit fixed statements by encoding it as byref */
2512 if (type->byref && candidate->byref && (type->type == MONO_TYPE_I) && !mono_type_is_reference (candidate)) {
2513 if (!IS_STRICT_MODE (ctx))
2517 return verify_type_compatibility_full (ctx, type, candidate, FALSE);
2521 verify_stack_type_compatibility (VerifyContext *ctx, MonoType *type, ILStackDesc *stack)
2523 return verify_stack_type_compatibility_full (ctx, type, stack, FALSE, FALSE);
2527 mono_delegate_type_equal (MonoType *target, MonoType *candidate)
2529 if (candidate->byref ^ target->byref)
2532 switch (target->type) {
2533 case MONO_TYPE_VOID:
2536 case MONO_TYPE_BOOLEAN:
2539 case MONO_TYPE_CHAR:
2548 case MONO_TYPE_STRING:
2549 case MONO_TYPE_TYPEDBYREF:
2550 return candidate->type == target->type;
2553 if (candidate->type != MONO_TYPE_PTR)
2555 return mono_delegate_type_equal (target->data.type, candidate->data.type);
2557 case MONO_TYPE_FNPTR:
2558 if (candidate->type != MONO_TYPE_FNPTR)
2560 return mono_delegate_signature_equal (mono_type_get_signature (target), mono_type_get_signature (candidate), FALSE);
2562 case MONO_TYPE_GENERICINST: {
2563 MonoClass *target_klass;
2564 MonoClass *candidate_klass;
2565 target_klass = mono_class_from_mono_type (target);
2566 candidate_klass = mono_class_from_mono_type (candidate);
2567 /*FIXME handle nullables and enum*/
2568 return verifier_class_is_assignable_from (target_klass, candidate_klass);
2570 case MONO_TYPE_OBJECT:
2571 return MONO_TYPE_IS_REFERENCE (candidate);
2573 case MONO_TYPE_CLASS:
2574 return verifier_class_is_assignable_from(target->data.klass, mono_class_from_mono_type (candidate));
2576 case MONO_TYPE_SZARRAY:
2577 if (candidate->type != MONO_TYPE_SZARRAY)
2579 return verifier_class_is_assignable_from (mono_class_from_mono_type (target)->element_class, mono_class_from_mono_type (candidate)->element_class);
2581 case MONO_TYPE_ARRAY:
2582 if (candidate->type != MONO_TYPE_ARRAY)
2584 return is_array_type_compatible (target, candidate);
2586 case MONO_TYPE_VALUETYPE:
2587 /*FIXME handle nullables and enum*/
2588 return mono_class_from_mono_type (candidate) == mono_class_from_mono_type (target);
2591 return candidate->type == MONO_TYPE_VAR && mono_type_get_generic_param_num (target) == mono_type_get_generic_param_num (candidate);
2594 case MONO_TYPE_MVAR:
2595 return candidate->type == MONO_TYPE_MVAR && mono_type_get_generic_param_num (target) == mono_type_get_generic_param_num (candidate);
2599 VERIFIER_DEBUG ( printf ("Unknown type %d. Implement me!\n", target->type); );
2600 g_assert_not_reached ();
2606 mono_delegate_param_equal (MonoType *delegate, MonoType *method)
2608 if (mono_metadata_type_equal_full (delegate, method, TRUE))
2611 return mono_delegate_type_equal (method, delegate);
2615 mono_delegate_ret_equal (MonoType *delegate, MonoType *method)
2617 if (mono_metadata_type_equal_full (delegate, method, TRUE))
2620 return mono_delegate_type_equal (delegate, method);
2624 * mono_delegate_signature_equal:
2626 * Compare two signatures in the way expected by delegates.
2628 * This function only exists due to the fact that it should ignore the 'has_this' part of the signature.
2630 * FIXME can this function be eliminated and proper metadata functionality be used?
2633 mono_delegate_signature_equal (MonoMethodSignature *delegate_sig, MonoMethodSignature *method_sig, gboolean is_static_ldftn)
2636 int method_offset = is_static_ldftn ? 1 : 0;
2638 if (delegate_sig->param_count + method_offset != method_sig->param_count)
2641 if (delegate_sig->call_convention != method_sig->call_convention)
2644 for (i = 0; i < delegate_sig->param_count; i++) {
2645 MonoType *p1 = delegate_sig->params [i];
2646 MonoType *p2 = method_sig->params [i + method_offset];
2648 if (!mono_delegate_param_equal (p1, p2))
2652 if (!mono_delegate_ret_equal (delegate_sig->ret, method_sig->ret))
2659 mono_verifier_is_signature_compatible (MonoMethodSignature *target, MonoMethodSignature *candidate)
2661 return mono_delegate_signature_equal (target, candidate, FALSE);
2665 * verify_ldftn_delegate:
2667 * Verify properties of ldftn based delegates.
2670 verify_ldftn_delegate (VerifyContext *ctx, MonoClass *delegate, ILStackDesc *value, ILStackDesc *funptr)
2672 MonoMethod *method = funptr->method;
2674 /*ldftn non-final virtuals only allowed if method is not static,
2675 * the object is a this arg (comes from a ldarg.0), and there is no starg.0.
2676 * This rules doesn't apply if the object on stack is a boxed valuetype.
2678 if ((method->flags & METHOD_ATTRIBUTE_VIRTUAL) && !(method->flags & METHOD_ATTRIBUTE_FINAL) && !mono_class_is_sealed (method->klass) && !stack_slot_is_boxed_value (value)) {
2679 /*A stdarg 0 must not happen, we fail here only in fail fast mode to avoid double error reports*/
2680 if (IS_FAIL_FAST_MODE (ctx) && ctx->has_this_store)
2681 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid ldftn with virtual function in method with stdarg 0 at 0x%04x", ctx->ip_offset));
2683 /*current method must not be static*/
2684 if (ctx->method->flags & METHOD_ATTRIBUTE_STATIC)
2685 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid ldftn with virtual function at 0x%04x", ctx->ip_offset));
2687 /*value is the this pointer, loaded using ldarg.0 */
2688 if (!stack_slot_is_this_pointer (value))
2689 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));
2691 ctx->code [ctx->ip_offset].flags |= IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL;
2696 * verify_delegate_compatibility:
2698 * Verify delegate creation sequence.
2702 verify_delegate_compatibility (VerifyContext *ctx, MonoClass *delegate, ILStackDesc *value, ILStackDesc *funptr)
2704 #define IS_VALID_OPCODE(offset, opcode) (ip [ip_offset - offset] == opcode && (ctx->code [ip_offset - offset].flags & IL_CODE_FLAG_SEEN))
2705 #define IS_LOAD_FUN_PTR(kind) (IS_VALID_OPCODE (6, CEE_PREFIX1) && ip [ip_offset - 5] == kind)
2707 MonoMethod *invoke, *method;
2708 const guint8 *ip = ctx->header->code;
2709 guint32 ip_offset = ctx->ip_offset;
2710 gboolean is_static_ldftn = FALSE, is_first_arg_bound = FALSE;
2712 if (stack_slot_get_type (funptr) != TYPE_PTR || !funptr->method) {
2713 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid function pointer parameter for delegate constructor at 0x%04x", ctx->ip_offset));
2717 invoke = mono_get_delegate_invoke (delegate);
2718 method = funptr->method;
2720 if (!method || !mono_method_signature (method)) {
2721 char *name = mono_type_get_full_name (delegate);
2722 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid method on stack to create delegate %s construction at 0x%04x", name, ctx->ip_offset));
2727 if (!invoke || !mono_method_signature (invoke)) {
2728 char *name = mono_type_get_full_name (delegate);
2729 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Delegate type %s with bad Invoke method at 0x%04x", name, ctx->ip_offset));
2734 is_static_ldftn = (ip_offset > 5 && IS_LOAD_FUN_PTR (CEE_LDFTN)) && method->flags & METHOD_ATTRIBUTE_STATIC;
2736 if (is_static_ldftn)
2737 is_first_arg_bound = mono_method_signature (invoke)->param_count + 1 == mono_method_signature (method)->param_count;
2739 if (!mono_delegate_signature_equal (mono_method_signature (invoke), mono_method_signature (method), is_first_arg_bound)) {
2740 char *fun_sig = mono_signature_get_desc (mono_method_signature (method), FALSE);
2741 char *invoke_sig = mono_signature_get_desc (mono_method_signature (invoke), FALSE);
2742 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));
2744 g_free (invoke_sig);
2748 * Delegate code sequences:
2754 * [-6] ldvirtftn token
2758 if (ip_offset > 5 && IS_LOAD_FUN_PTR (CEE_LDFTN)) {
2759 verify_ldftn_delegate (ctx, delegate, value, funptr);
2760 } else if (ip_offset > 6 && IS_VALID_OPCODE (7, CEE_DUP) && IS_LOAD_FUN_PTR (CEE_LDVIRTFTN)) {
2761 ctx->code [ip_offset - 6].flags |= IL_CODE_DELEGATE_SEQUENCE;
2763 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid code sequence for delegate creation at 0x%04x", ctx->ip_offset));
2765 ctx->code [ip_offset].flags |= IL_CODE_DELEGATE_SEQUENCE;
2768 if (is_first_arg_bound) {
2769 if (mono_method_signature (method)->param_count == 0 || !verify_stack_type_compatibility_full (ctx, mono_method_signature (method)->params [0], value, FALSE, TRUE))
2770 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("This object not compatible with function pointer for delegate creation at 0x%04x", ctx->ip_offset));
2772 if (method->flags & METHOD_ATTRIBUTE_STATIC) {
2773 if (!stack_slot_is_null_literal (value))
2774 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Non-null this args used with static function for delegate creation at 0x%04x", ctx->ip_offset));
2776 if (!verify_stack_type_compatibility_full (ctx, &method->klass->byval_arg, value, FALSE, TRUE) && !stack_slot_is_null_literal (value))
2777 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("This object not compatible with function pointer for delegate creation at 0x%04x", ctx->ip_offset));
2781 if (stack_slot_get_type (value) != TYPE_COMPLEX)
2782 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid first parameter for delegate creation at 0x%04x", ctx->ip_offset));
2784 #undef IS_VALID_OPCODE
2785 #undef IS_LOAD_FUN_PTR
2788 /* implement the opcode checks*/
2790 push_arg (VerifyContext *ctx, unsigned int arg, int take_addr)
2794 if (arg >= ctx->max_args) {
2796 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have argument %d", arg + 1));
2798 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method doesn't have argument %d", arg + 1));
2799 if (check_overflow (ctx)) //FIXME: what sane value could we ever push?
2800 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
2802 } else if (check_overflow (ctx)) {
2803 /*We must let the value be pushed, otherwise we would get an underflow error*/
2804 check_unverifiable_type (ctx, ctx->params [arg]);
2805 if (ctx->params [arg]->byref && take_addr)
2806 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ByRef of ByRef at 0x%04x", ctx->ip_offset));
2807 top = stack_push (ctx);
2808 if (!set_stack_value (ctx, top, ctx->params [arg], take_addr))
2811 if (arg == 0 && !(ctx->method->flags & METHOD_ATTRIBUTE_STATIC)) {
2813 ctx->has_this_store = TRUE;
2815 top->stype |= THIS_POINTER_MASK;
2816 if (mono_method_is_constructor (ctx->method) && !ctx->super_ctor_called && !ctx->method->klass->valuetype)
2817 top->stype |= UNINIT_THIS_MASK;
2823 push_local (VerifyContext *ctx, guint32 arg, int take_addr)
2825 if (arg >= ctx->num_locals) {
2826 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have local %d", arg + 1));
2827 } else if (check_overflow (ctx)) {
2828 /*We must let the value be pushed, otherwise we would get an underflow error*/
2829 check_unverifiable_type (ctx, ctx->locals [arg]);
2830 if (ctx->locals [arg]->byref && take_addr)
2831 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ByRef of ByRef at 0x%04x", ctx->ip_offset));
2833 set_stack_value (ctx, stack_push (ctx), ctx->locals [arg], take_addr);
2838 store_arg (VerifyContext *ctx, guint32 arg)
2842 if (arg >= ctx->max_args) {
2843 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method doesn't have argument %d at 0x%04x", arg + 1, ctx->ip_offset));
2844 if (check_underflow (ctx, 1))
2849 if (check_underflow (ctx, 1)) {
2850 value = stack_pop (ctx);
2851 if (!verify_stack_type_compatibility (ctx, ctx->params [arg], value)) {
2852 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type %s in argument store at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
2855 if (arg == 0 && !(ctx->method->flags & METHOD_ATTRIBUTE_STATIC))
2856 ctx->has_this_store = 1;
2860 store_local (VerifyContext *ctx, guint32 arg)
2863 if (arg >= ctx->num_locals) {
2864 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have local var %d at 0x%04x", arg + 1, ctx->ip_offset));
2868 /*TODO verify definite assigment */
2869 if (!check_underflow (ctx, 1))
2872 value = stack_pop (ctx);
2873 if (ctx->locals [arg]->byref && stack_slot_is_managed_mutability_pointer (value))
2874 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));
2876 if (!verify_stack_type_compatibility (ctx, ctx->locals [arg], value)) {
2877 char *expected = mono_type_full_name (ctx->locals [arg]);
2878 char *found = stack_slot_full_name (value);
2879 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type '%s' on stack cannot be stored to local %d with type '%s' at 0x%04x",
2889 /*FIXME add and sub needs special care here*/
2891 do_binop (VerifyContext *ctx, unsigned int opcode, const unsigned char table [TYPE_MAX][TYPE_MAX])
2893 ILStackDesc *a, *b, *top;
2894 int idxa, idxb, complexMerge = 0;
2897 if (!check_underflow (ctx, 2))
2899 b = stack_pop (ctx);
2900 a = stack_pop (ctx);
2902 idxa = stack_slot_get_underlying_type (a);
2903 if (stack_slot_is_managed_pointer (a)) {
2908 idxb = stack_slot_get_underlying_type (b);
2909 if (stack_slot_is_managed_pointer (b)) {
2916 res = table [idxa][idxb];
2918 VERIFIER_DEBUG ( printf ("binop res %d\n", res); );
2919 VERIFIER_DEBUG ( printf ("idxa %d idxb %d\n", idxa, idxb); );
2921 top = stack_push (ctx);
2922 if (res == TYPE_INV) {
2923 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)));
2924 copy_stack_value (top, a);
2928 if (res & NON_VERIFIABLE_RESULT) {
2929 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)));
2931 res = res & ~NON_VERIFIABLE_RESULT;
2934 if (complexMerge && res == TYPE_PTR) {
2935 if (complexMerge == 1)
2936 copy_stack_value (top, a);
2937 else if (complexMerge == 2)
2938 copy_stack_value (top, b);
2940 * There is no need to merge the type of two pointers.
2941 * The only valid operation is subtraction, that returns a native
2942 * int as result and can be used with any 2 pointer kinds.
2943 * This is valid acording to Patition III 1.1.4
2952 do_boolean_branch_op (VerifyContext *ctx, int delta)
2954 int target = ctx->ip_offset + delta;
2957 VERIFIER_DEBUG ( printf ("boolean branch offset %d delta %d target %d\n", ctx->ip_offset, delta, target); );
2959 if (target < 0 || target >= ctx->code_size) {
2960 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Boolean branch target out of code at 0x%04x", ctx->ip_offset));
2964 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
2966 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
2969 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
2973 ctx->target = target;
2975 if (!check_underflow (ctx, 1))
2978 top = stack_pop (ctx);
2979 if (!is_valid_bool_arg (top))
2980 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));
2982 check_unmanaged_pointer (ctx, top);
2986 stack_slot_is_complex_type_not_reference_type (ILStackDesc *slot)
2988 return stack_slot_get_type (slot) == TYPE_COMPLEX && !MONO_TYPE_IS_REFERENCE (slot->type) && !stack_slot_is_boxed_value (slot);
2992 stack_slot_is_reference_value (ILStackDesc *slot)
2994 return stack_slot_get_type (slot) == TYPE_COMPLEX && (MONO_TYPE_IS_REFERENCE (slot->type) || stack_slot_is_boxed_value (slot));
2998 do_branch_op (VerifyContext *ctx, signed int delta, const unsigned char table [TYPE_MAX][TYPE_MAX])
3003 int target = ctx->ip_offset + delta;
3005 VERIFIER_DEBUG ( printf ("branch offset %d delta %d target %d\n", ctx->ip_offset, delta, target); );
3007 if (target < 0 || target >= ctx->code_size) {
3008 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target out of code at 0x%04x", ctx->ip_offset));
3012 switch (is_valid_cmp_branch_instruction (ctx->header, ctx->ip_offset, target)) {
3013 case 1: /*FIXME use constants and not magic numbers.*/
3014 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
3017 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
3021 ctx->target = target;
3023 if (!check_underflow (ctx, 2))
3026 b = stack_pop (ctx);
3027 a = stack_pop (ctx);
3029 idxa = stack_slot_get_underlying_type (a);
3030 if (stack_slot_is_managed_pointer (a))
3033 idxb = stack_slot_get_underlying_type (b);
3034 if (stack_slot_is_managed_pointer (b))
3037 if (stack_slot_is_complex_type_not_reference_type (a) || stack_slot_is_complex_type_not_reference_type (b)) {
3042 res = table [idxa][idxb];
3045 VERIFIER_DEBUG ( printf ("branch res %d\n", res); );
3046 VERIFIER_DEBUG ( printf ("idxa %d idxb %d\n", idxa, idxb); );
3048 if (res == TYPE_INV) {
3049 CODE_NOT_VERIFIABLE (ctx,
3050 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));
3051 } else if (res & NON_VERIFIABLE_RESULT) {
3052 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));
3053 res = res & ~NON_VERIFIABLE_RESULT;
3058 do_cmp_op (VerifyContext *ctx, const unsigned char table [TYPE_MAX][TYPE_MAX], guint32 opcode)
3064 if (!check_underflow (ctx, 2))
3066 b = stack_pop (ctx);
3067 a = stack_pop (ctx);
3069 if (opcode == CEE_CGT_UN) {
3070 if ((stack_slot_is_reference_value (a) && stack_slot_is_null_literal (b)) ||
3071 (stack_slot_is_reference_value (b) && stack_slot_is_null_literal (a))) {
3072 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3077 idxa = stack_slot_get_underlying_type (a);
3078 if (stack_slot_is_managed_pointer (a))
3081 idxb = stack_slot_get_underlying_type (b);
3082 if (stack_slot_is_managed_pointer (b))
3085 if (stack_slot_is_complex_type_not_reference_type (a) || stack_slot_is_complex_type_not_reference_type (b)) {
3090 res = table [idxa][idxb];
3093 if(res == TYPE_INV) {
3094 char *left_type = stack_slot_full_name (a);
3095 char *right_type = stack_slot_full_name (b);
3096 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf("Compare instruction applyed to ill formed stack (%s x %s) at 0x%04x", left_type, right_type, ctx->ip_offset));
3098 g_free (right_type);
3099 } else if (res & NON_VERIFIABLE_RESULT) {
3100 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));
3101 res = res & ~NON_VERIFIABLE_RESULT;
3103 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3107 do_ret (VerifyContext *ctx)
3109 MonoType *ret = ctx->signature->ret;
3110 VERIFIER_DEBUG ( printf ("checking ret\n"); );
3111 if (ret->type != MONO_TYPE_VOID) {
3113 if (!check_underflow (ctx, 1))
3116 top = stack_pop(ctx);
3118 if (!verify_stack_type_compatibility (ctx, ctx->signature->ret, top)) {
3119 char *ret_type = mono_type_full_name (ctx->signature->ret);
3120 char *stack_type = stack_slot_full_name (top);
3121 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));
3122 g_free (stack_type);
3127 if (ret->byref || ret->type == MONO_TYPE_TYPEDBYREF || mono_type_is_value_type (ret, "System", "ArgIterator") || mono_type_is_value_type (ret, "System", "RuntimeArgumentHandle"))
3128 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method returns byref, TypedReference, ArgIterator or RuntimeArgumentHandle at 0x%04x", ctx->ip_offset));
3131 if (ctx->eval.size > 0) {
3132 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack not empty (%d) after ret at 0x%04x", ctx->eval.size, ctx->ip_offset));
3134 if (in_any_block (ctx->header, ctx->ip_offset))
3135 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ret cannot escape exception blocks at 0x%04x", ctx->ip_offset));
3139 * 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.
3140 * This is illegal but mono_get_method_full decoded it.
3141 * TODO handle calling .ctor outside one or calling the .ctor for other class but super
3144 do_invoke_method (VerifyContext *ctx, int method_token, gboolean virtual_)
3148 MonoMethodSignature *sig;
3151 gboolean virt_check_this = FALSE;
3152 gboolean constrained = ctx->prefix_set & PREFIX_CONSTRAINED;
3154 if (!(method = verifier_load_method (ctx, method_token, virtual_ ? "callvirt" : "call")))
3158 CLEAR_PREFIX (ctx, PREFIX_CONSTRAINED);
3160 if (method->klass->valuetype) // && !constrained ???
3161 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use callvirtual with valuetype method at 0x%04x", ctx->ip_offset));
3163 if ((method->flags & METHOD_ATTRIBUTE_STATIC))
3164 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use callvirtual with static method at 0x%04x", ctx->ip_offset));
3167 if (method->flags & METHOD_ATTRIBUTE_ABSTRACT)
3168 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use call with an abstract method at 0x%04x", ctx->ip_offset));
3170 if ((method->flags & METHOD_ATTRIBUTE_VIRTUAL) && !(method->flags & METHOD_ATTRIBUTE_FINAL) && !mono_class_is_sealed (method->klass)) {
3171 virt_check_this = TRUE;
3172 ctx->code [ctx->ip_offset].flags |= IL_CODE_CALL_NONFINAL_VIRTUAL;
3176 if (!(sig = mono_method_get_signature_checked (method, ctx->image, method_token, ctx->generic_context, &error))) {
3177 mono_error_cleanup (&error);
3178 sig = mono_method_get_signature_checked (method, ctx->image, method_token, NULL, &error);
3182 char *name = mono_type_get_full_name (method->klass);
3183 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Could not resolve signature of %s:%s at 0x%04x due to: %s", name, method->name, ctx->ip_offset, mono_error_get_message (&error)));
3184 mono_error_cleanup (&error);
3189 param_count = sig->param_count + sig->hasthis;
3190 if (!check_underflow (ctx, param_count))
3193 for (i = sig->param_count - 1; i >= 0; --i) {
3194 VERIFIER_DEBUG ( printf ("verifying argument %d\n", i); );
3195 value = stack_pop (ctx);
3196 if (!verify_stack_type_compatibility (ctx, sig->params[i], value)) {
3197 char *stack_name = stack_slot_full_name (value);
3198 char *sig_name = mono_type_full_name (sig->params [i]);
3199 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));
3200 g_free (stack_name);
3204 if (stack_slot_is_managed_mutability_pointer (value))
3205 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));
3207 if ((ctx->prefix_set & PREFIX_TAIL) && stack_slot_is_managed_pointer (value)) {
3208 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));
3214 MonoType *type = &method->klass->byval_arg;
3217 if (mono_method_is_constructor (method) && !method->klass->valuetype) {
3218 if (IS_STRICT_MODE (ctx) && !mono_method_is_constructor (ctx->method))
3219 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot call a constructor outside one at 0x%04x", ctx->ip_offset));
3220 if (IS_STRICT_MODE (ctx) && method->klass != ctx->method->klass->parent && method->klass != ctx->method->klass)
3221 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));
3223 ctx->super_ctor_called = TRUE;
3224 value = stack_pop_safe (ctx);
3225 if (IS_STRICT_MODE (ctx) && (value->stype & THIS_POINTER_MASK) != THIS_POINTER_MASK)
3226 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid 'this ptr' argument for constructor at 0x%04x", ctx->ip_offset));
3228 value = stack_pop (ctx);
3231 copy_stack_value (©, value);
3232 //TODO we should extract this to a 'drop_byref_argument' and use everywhere
3233 //Other parts of the code suffer from the same issue of
3234 copy.type = mono_type_get_type_byval (copy.type);
3235 copy.stype &= ~POINTER_MASK;
3237 if (virt_check_this && !stack_slot_is_this_pointer (value) && !(method->klass->valuetype || stack_slot_is_boxed_value (value)))
3238 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));
3240 if (constrained && virtual_) {
3241 if (!stack_slot_is_managed_pointer (value))
3242 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Object is not a managed pointer for a constrained call at 0x%04x", ctx->ip_offset));
3243 if (!mono_metadata_type_equal_full (mono_type_get_type_byval (value->type), mono_type_get_underlying_type (ctx->constrained_type), TRUE))
3244 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Object not compatible with constrained type at 0x%04x", ctx->ip_offset));
3245 copy.stype |= BOXED_MASK;
3246 copy.type = ctx->constrained_type;
3248 if (stack_slot_is_managed_pointer (value) && !mono_class_from_mono_type (value->type)->valuetype)
3249 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));
3251 if (!virtual_ && mono_class_from_mono_type (value->type)->valuetype && !method->klass->valuetype && !stack_slot_is_boxed_value (value))
3252 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot call a valuetype baseclass at 0x%04x", ctx->ip_offset));
3254 if (virtual_ && mono_class_from_mono_type (value->type)->valuetype && !stack_slot_is_boxed_value (value))
3255 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a valuetype with callvirt at 0x%04x", ctx->ip_offset));
3257 if (method->klass->valuetype && (stack_slot_is_boxed_value (value) || !stack_slot_is_managed_pointer (value)))
3258 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));
3260 if (!verify_stack_type_compatibility (ctx, type, ©)) {
3261 char *expected = mono_type_full_name (type);
3262 char *effective = stack_slot_full_name (©);
3263 char *method_name = mono_method_full_name (method, TRUE);
3264 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",
3265 expected, effective, method_name, ctx->ip_offset));
3266 g_free (method_name);
3271 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, mono_class_from_mono_type (value->type))) {
3272 char *name = mono_method_full_name (method, TRUE);
3273 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Method %s is not accessible at 0x%04x", name, ctx->ip_offset), MONO_EXCEPTION_METHOD_ACCESS);
3277 } else if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, NULL)) {
3278 char *name = mono_method_full_name (method, TRUE);
3279 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Method %s is not accessible at 0x%04x", name, ctx->ip_offset), MONO_EXCEPTION_METHOD_ACCESS);
3283 if (sig->ret->type != MONO_TYPE_VOID) {
3284 if (!mono_type_is_valid_in_context (ctx, sig->ret))
3287 if (check_overflow (ctx)) {
3288 value = stack_push (ctx);
3289 set_stack_value (ctx, value, sig->ret, FALSE);
3290 if ((ctx->prefix_set & PREFIX_READONLY) && method->klass->rank && !strcmp (method->name, "Address")) {
3291 ctx->prefix_set &= ~PREFIX_READONLY;
3292 value->stype |= CMMP_MASK;
3297 if ((ctx->prefix_set & PREFIX_TAIL)) {
3298 if (!mono_delegate_ret_equal (mono_method_signature (ctx->method)->ret, sig->ret))
3299 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Tail call with incompatible return type at 0x%04x", ctx->ip_offset));
3300 if (ctx->header->code [ctx->ip_offset + 5] != CEE_RET)
3301 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Tail call not followed by ret at 0x%04x", ctx->ip_offset));
3307 do_push_static_field (VerifyContext *ctx, int token, gboolean take_addr)
3309 MonoClassField *field;
3311 if (!check_overflow (ctx))
3314 CLEAR_PREFIX (ctx, PREFIX_VOLATILE);
3316 if (!(field = verifier_load_field (ctx, token, &klass, take_addr ? "ldsflda" : "ldsfld")))
3319 if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC)) {
3320 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot load non static field at 0x%04x", ctx->ip_offset));
3323 /*taking the address of initonly field only works from the static constructor */
3324 if (take_addr && (field->type->attrs & FIELD_ATTRIBUTE_INIT_ONLY) &&
3325 !(field->parent == ctx->method->klass && (ctx->method->flags & (METHOD_ATTRIBUTE_SPECIAL_NAME | METHOD_ATTRIBUTE_STATIC)) && !strcmp (".cctor", ctx->method->name)))
3326 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a init-only field at 0x%04x", ctx->ip_offset));
3328 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3329 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3331 set_stack_value (ctx, stack_push (ctx), field->type, take_addr);
3335 do_store_static_field (VerifyContext *ctx, int token) {
3336 MonoClassField *field;
3339 CLEAR_PREFIX (ctx, PREFIX_VOLATILE);
3341 if (!check_underflow (ctx, 1))
3344 value = stack_pop (ctx);
3346 if (!(field = verifier_load_field (ctx, token, &klass, "stsfld")))
3349 if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC)) {
3350 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot store non static field at 0x%04x", ctx->ip_offset));
3354 if (field->type->type == MONO_TYPE_TYPEDBYREF) {
3355 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Typedbyref field is an unverfiable type in store static field at 0x%04x", ctx->ip_offset));
3359 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3360 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3362 if (!verify_stack_type_compatibility (ctx, field->type, value)) {
3363 char *stack_name = stack_slot_full_name (value);
3364 char *field_name = mono_type_full_name (field->type);
3365 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type in static field store expected '%s' but found '%s' at 0x%04x",
3366 field_name, stack_name, ctx->ip_offset));
3367 g_free (field_name);
3368 g_free (stack_name);
3373 check_is_valid_type_for_field_ops (VerifyContext *ctx, int token, ILStackDesc *obj, MonoClassField **ret_field, const char *opcode)
3375 MonoClassField *field;
3377 gboolean is_pointer;
3379 /*must be a reference type, a managed pointer, an unamanaged pointer, or a valuetype*/
3380 if (!(field = verifier_load_field (ctx, token, &klass, opcode)))
3384 //the value on stack is going to be used as a pointer
3385 is_pointer = stack_slot_get_type (obj) == TYPE_PTR || (stack_slot_get_type (obj) == TYPE_NATIVE_INT && !get_stack_type (&field->parent->byval_arg));
3387 if (field->type->type == MONO_TYPE_TYPEDBYREF) {
3388 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Typedbyref field is an unverfiable type at 0x%04x", ctx->ip_offset));
3391 g_assert (obj->type);
3393 /*The value on the stack must be a subclass of the defining type of the field*/
3394 /* we need to check if we can load the field from the stack value*/
3396 if (stack_slot_get_underlying_type (obj) == TYPE_NATIVE_INT)
3397 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Native int is not a verifiable type to reference a field at 0x%04x", ctx->ip_offset));
3399 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3400 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3402 if (!field->parent->valuetype && stack_slot_is_managed_pointer (obj))
3403 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));
3405 /*a value type can be loaded from a value or a managed pointer, but not a boxed object*/
3406 if (field->parent->valuetype && stack_slot_is_boxed_value (obj))
3407 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));
3409 if (!stack_slot_is_null_literal (obj) && !verify_stack_type_compatibility_full (ctx, &field->parent->byval_arg, obj, TRUE, FALSE)) {
3410 char *found = stack_slot_full_name (obj);
3411 char *expected = mono_type_full_name (&field->parent->byval_arg);
3412 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));
3417 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, mono_class_from_mono_type (obj->type)))
3418 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3421 check_unmanaged_pointer (ctx, obj);
3426 do_push_field (VerifyContext *ctx, int token, gboolean take_addr)
3429 MonoClassField *field;
3432 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3434 if (!check_underflow (ctx, 1))
3436 obj = stack_pop_safe (ctx);
3438 if (!check_is_valid_type_for_field_ops (ctx, token, obj, &field, take_addr ? "ldflda" : "ldfld"))
3441 if (take_addr && field->parent->valuetype && !stack_slot_is_managed_pointer (obj))
3442 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a temporary value-type at 0x%04x", ctx->ip_offset));
3444 if (take_addr && (field->type->attrs & FIELD_ATTRIBUTE_INIT_ONLY) &&
3445 !(field->parent == ctx->method->klass && mono_method_is_constructor (ctx->method)))
3446 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a init-only field at 0x%04x", ctx->ip_offset));
3448 set_stack_value (ctx, stack_push (ctx), field->type, take_addr);
3452 do_store_field (VerifyContext *ctx, int token)
3454 ILStackDesc *value, *obj;
3455 MonoClassField *field;
3456 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3458 if (!check_underflow (ctx, 2))
3461 value = stack_pop (ctx);
3462 obj = stack_pop_safe (ctx);
3464 if (!check_is_valid_type_for_field_ops (ctx, token, obj, &field, "stfld"))
3467 if (!verify_stack_type_compatibility (ctx, field->type, value))
3468 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type %s in field store at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3471 /*TODO proper handle for Nullable<T>*/
3473 do_box_value (VerifyContext *ctx, int klass_token)
3476 MonoType *type = get_boxable_mono_type (ctx, klass_token, "box");
3482 if (!check_underflow (ctx, 1))
3485 value = stack_pop (ctx);
3486 /*box is a nop for reference types*/
3488 if (stack_slot_get_underlying_type (value) == TYPE_COMPLEX && MONO_TYPE_IS_REFERENCE (value->type) && MONO_TYPE_IS_REFERENCE (type)) {
3489 stack_push_stack_val (ctx, value)->stype |= BOXED_MASK;
3494 if (!verify_stack_type_compatibility (ctx, type, value))
3495 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for boxing operation at 0x%04x", ctx->ip_offset));
3497 klass = mono_class_from_mono_type (type);
3498 if (mono_class_is_nullable (klass))
3499 type = &mono_class_get_nullable_param (klass)->byval_arg;
3500 stack_push_val (ctx, TYPE_COMPLEX | BOXED_MASK, type);
3504 do_unbox_value (VerifyContext *ctx, int klass_token)
3507 MonoType *type = get_boxable_mono_type (ctx, klass_token, "unbox");
3512 if (!check_underflow (ctx, 1))
3515 if (!mono_class_from_mono_type (type)->valuetype)
3516 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid reference type for unbox at 0x%04x", ctx->ip_offset));
3518 value = stack_pop (ctx);
3520 /*Value should be: a boxed valuetype or a reference type*/
3521 if (!(stack_slot_get_type (value) == TYPE_COMPLEX &&
3522 (stack_slot_is_boxed_value (value) || !mono_class_from_mono_type (value->type)->valuetype)))
3523 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type %s at stack for unbox operation at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3525 set_stack_value (ctx, value = stack_push (ctx), mono_type_get_type_byref (type), FALSE);
3526 value->stype |= CMMP_MASK;
3530 do_unbox_any (VerifyContext *ctx, int klass_token)
3533 MonoType *type = get_boxable_mono_type (ctx, klass_token, "unbox.any");
3538 if (!check_underflow (ctx, 1))
3541 value = stack_pop (ctx);
3543 /*Value should be: a boxed valuetype or a reference type*/
3544 if (!(stack_slot_get_type (value) == TYPE_COMPLEX &&
3545 (stack_slot_is_boxed_value (value) || !mono_class_from_mono_type (value->type)->valuetype)))
3546 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));
3548 set_stack_value (ctx, stack_push (ctx), type, FALSE);
3552 do_unary_math_op (VerifyContext *ctx, int op)
3555 if (!check_underflow (ctx, 1))
3557 value = stack_pop (ctx);
3558 switch (stack_slot_get_type (value)) {
3561 case TYPE_NATIVE_INT:
3566 case TYPE_COMPLEX: /*only enums are ok*/
3567 if (mono_type_is_enum_type (value->type))
3570 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for unary not at 0x%04x", ctx->ip_offset));
3572 stack_push_stack_val (ctx, value);
3576 do_conversion (VerifyContext *ctx, int kind)
3579 if (!check_underflow (ctx, 1))
3581 value = stack_pop (ctx);
3583 switch (stack_slot_get_type (value)) {
3586 case TYPE_NATIVE_INT:
3590 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));
3595 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3598 stack_push_val (ctx,TYPE_I8, &mono_defaults.int64_class->byval_arg);
3601 stack_push_val (ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
3603 case TYPE_NATIVE_INT:
3604 stack_push_val (ctx, TYPE_NATIVE_INT, &mono_defaults.int_class->byval_arg);
3607 g_error ("unknown type %02x in conversion", kind);
3613 do_load_token (VerifyContext *ctx, int token)
3617 MonoClass *handle_class;
3618 if (!check_overflow (ctx))
3621 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
3622 handle = mono_method_get_wrapper_data (ctx->method, token);
3623 handle_class = (MonoClass *)mono_method_get_wrapper_data (ctx->method, token + 1);
3624 if (handle_class == mono_defaults.typehandle_class)
3625 handle = &((MonoClass*)handle)->byval_arg;
3627 switch (token & 0xff000000) {
3628 case MONO_TOKEN_TYPE_DEF:
3629 case MONO_TOKEN_TYPE_REF:
3630 case MONO_TOKEN_TYPE_SPEC:
3631 case MONO_TOKEN_FIELD_DEF:
3632 case MONO_TOKEN_METHOD_DEF:
3633 case MONO_TOKEN_METHOD_SPEC:
3634 case MONO_TOKEN_MEMBER_REF:
3635 if (!token_bounds_check (ctx->image, token)) {
3636 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));
3641 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));
3645 handle = mono_ldtoken_checked (ctx->image, token, &handle_class, ctx->generic_context, &error);
3649 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid token 0x%x for ldtoken at 0x%04x due to %s", token, ctx->ip_offset, mono_error_get_message (&error)));
3650 mono_error_cleanup (&error);
3653 if (handle_class == mono_defaults.typehandle_class) {
3654 mono_type_is_valid_in_context (ctx, (MonoType*)handle);
3655 } else if (handle_class == mono_defaults.methodhandle_class) {
3656 mono_method_is_valid_in_context (ctx, (MonoMethod*)handle);
3657 } else if (handle_class == mono_defaults.fieldhandle_class) {
3658 mono_type_is_valid_in_context (ctx, &((MonoClassField*)handle)->parent->byval_arg);
3660 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid ldtoken type %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
3662 stack_push_val (ctx, TYPE_COMPLEX, mono_class_get_type (handle_class));
3666 do_ldobj_value (VerifyContext *ctx, int token)
3669 MonoType *type = get_boxable_mono_type (ctx, token, "ldobj");
3670 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3675 if (!check_underflow (ctx, 1))
3678 value = stack_pop (ctx);
3679 if (!stack_slot_is_managed_pointer (value)
3680 && stack_slot_get_type (value) != TYPE_NATIVE_INT
3681 && !(stack_slot_get_type (value) == TYPE_PTR && value->type->type != MONO_TYPE_FNPTR)) {
3682 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid argument %s to ldobj at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3686 if (stack_slot_get_type (value) == TYPE_NATIVE_INT)
3687 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Using native pointer to ldobj at 0x%04x", ctx->ip_offset));
3689 /*We have a byval on the stack, but the comparison must be strict. */
3690 if (!verify_type_compatibility_full (ctx, type, mono_type_get_type_byval (value->type), TRUE))
3691 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldojb operation at 0x%04x", ctx->ip_offset));
3693 set_stack_value (ctx, stack_push (ctx), type, FALSE);
3697 do_stobj (VerifyContext *ctx, int token)
3699 ILStackDesc *dest, *src;
3700 MonoType *type = get_boxable_mono_type (ctx, token, "stobj");
3701 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3706 if (!check_underflow (ctx, 2))
3709 src = stack_pop (ctx);
3710 dest = stack_pop (ctx);
3712 if (stack_slot_is_managed_mutability_pointer (dest))
3713 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with stobj at 0x%04x", ctx->ip_offset));
3715 if (!stack_slot_is_managed_pointer (dest))
3716 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid destination of stobj operation at 0x%04x", ctx->ip_offset));
3718 if (stack_slot_is_boxed_value (src) && !MONO_TYPE_IS_REFERENCE (src->type) && !MONO_TYPE_IS_REFERENCE (type))
3719 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));
3721 if (!verify_stack_type_compatibility (ctx, type, src)) {
3722 char *type_name = mono_type_full_name (type);
3723 char *src_name = stack_slot_full_name (src);
3724 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));
3729 if (!verify_type_compatibility (ctx, mono_type_get_type_byval (dest->type), type))
3730 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Destination and token types of stobj don't match at 0x%04x", ctx->ip_offset));
3734 do_cpobj (VerifyContext *ctx, int token)
3736 ILStackDesc *dest, *src;
3737 MonoType *type = get_boxable_mono_type (ctx, token, "cpobj");
3741 if (!check_underflow (ctx, 2))
3744 src = stack_pop (ctx);
3745 dest = stack_pop (ctx);
3747 if (!stack_slot_is_managed_pointer (src))
3748 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid source of cpobj operation at 0x%04x", ctx->ip_offset));
3750 if (!stack_slot_is_managed_pointer (dest))
3751 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid destination of cpobj operation at 0x%04x", ctx->ip_offset));
3753 if (stack_slot_is_managed_mutability_pointer (dest))
3754 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with cpobj at 0x%04x", ctx->ip_offset));
3756 if (!verify_type_compatibility (ctx, type, mono_type_get_type_byval (src->type)))
3757 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Token and source types of cpobj don't match at 0x%04x", ctx->ip_offset));
3759 if (!verify_type_compatibility (ctx, mono_type_get_type_byval (dest->type), type))
3760 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Destination and token types of cpobj don't match at 0x%04x", ctx->ip_offset));
3764 do_initobj (VerifyContext *ctx, int token)
3767 MonoType *stack, *type = get_boxable_mono_type (ctx, token, "initobj");
3771 if (!check_underflow (ctx, 1))
3774 obj = stack_pop (ctx);
3776 if (!stack_slot_is_managed_pointer (obj))
3777 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid object address for initobj at 0x%04x", ctx->ip_offset));
3779 if (stack_slot_is_managed_mutability_pointer (obj))
3780 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with initobj at 0x%04x", ctx->ip_offset));
3782 stack = mono_type_get_type_byval (obj->type);
3783 if (MONO_TYPE_IS_REFERENCE (stack)) {
3784 if (!verify_type_compatibility (ctx, stack, type))
3785 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type token of initobj not compatible with value on stack at 0x%04x", ctx->ip_offset));
3786 else if (IS_STRICT_MODE (ctx) && !mono_metadata_type_equal (type, stack))
3787 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type token of initobj not compatible with value on stack at 0x%04x", ctx->ip_offset));
3788 } else if (!verify_type_compatibility (ctx, stack, type)) {
3789 char *expected_name = mono_type_full_name (type);
3790 char *stack_name = mono_type_full_name (stack);
3792 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));
3793 g_free (expected_name);
3794 g_free (stack_name);
3799 do_newobj (VerifyContext *ctx, int token)
3803 MonoMethodSignature *sig;
3805 gboolean is_delegate = FALSE;
3807 if (!(method = verifier_load_method (ctx, token, "newobj")))
3810 if (!mono_method_is_constructor (method)) {
3811 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method from token 0x%08x not a constructor at 0x%04x", token, ctx->ip_offset));
3815 if (mono_class_get_flags (method->klass) & (TYPE_ATTRIBUTE_ABSTRACT | TYPE_ATTRIBUTE_INTERFACE))
3816 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Trying to instantiate an abstract or interface type at 0x%04x", ctx->ip_offset));
3818 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, NULL)) {
3819 char *from = mono_method_full_name (ctx->method, TRUE);
3820 char *to = mono_method_full_name (method, TRUE);
3821 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);
3826 //FIXME use mono_method_get_signature_full
3827 sig = mono_method_signature (method);
3829 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid constructor signature to newobj at 0x%04x", ctx->ip_offset));
3833 if (!sig->hasthis) {
3834 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid constructor signature missing hasthis at 0x%04x", ctx->ip_offset));
3838 if (!check_underflow (ctx, sig->param_count))
3841 is_delegate = method->klass->parent == mono_defaults.multicastdelegate_class;
3844 ILStackDesc *funptr;
3845 //first arg is object, second arg is fun ptr
3846 if (sig->param_count != 2) {
3847 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid delegate constructor at 0x%04x", ctx->ip_offset));
3850 funptr = stack_pop (ctx);
3851 value = stack_pop (ctx);
3852 verify_delegate_compatibility (ctx, method->klass, value, funptr);
3854 for (i = sig->param_count - 1; i >= 0; --i) {
3855 VERIFIER_DEBUG ( printf ("verifying constructor argument %d\n", i); );
3856 value = stack_pop (ctx);
3857 if (!verify_stack_type_compatibility (ctx, sig->params [i], value)) {
3858 char *stack_name = stack_slot_full_name (value);
3859 char *sig_name = mono_type_full_name (sig->params [i]);
3860 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));
3861 g_free (stack_name);
3865 if (stack_slot_is_managed_mutability_pointer (value))
3866 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer as argument of newobj at 0x%04x", ctx->ip_offset));
3870 if (check_overflow (ctx))
3871 set_stack_value (ctx, stack_push (ctx), &method->klass->byval_arg, FALSE);
3875 do_cast (VerifyContext *ctx, int token, const char *opcode) {
3881 if (!check_underflow (ctx, 1))
3884 if (!(type = get_boxable_mono_type (ctx, token, opcode)))
3888 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid %s type at 0x%04x", opcode, ctx->ip_offset));
3892 value = stack_pop (ctx);
3893 is_boxed = stack_slot_is_boxed_value (value);
3895 if (stack_slot_is_managed_pointer (value))
3896 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value for %s at 0x%04x", opcode, ctx->ip_offset));
3897 else if (!MONO_TYPE_IS_REFERENCE (value->type) && !is_boxed) {
3898 char *name = stack_slot_full_name (value);
3899 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));
3903 switch (value->type->type) {
3904 case MONO_TYPE_FNPTR:
3906 case MONO_TYPE_TYPEDBYREF:
3907 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value for %s at 0x%04x", opcode, ctx->ip_offset));
3912 do_box = is_boxed || mono_type_is_generic_argument(type) || mono_class_from_mono_type (type)->valuetype;
3913 stack_push_val (ctx, TYPE_COMPLEX | (do_box ? BOXED_MASK : 0), type);
3917 mono_type_from_opcode (int opcode) {
3925 return &mono_defaults.sbyte_class->byval_arg;
3933 return &mono_defaults.int16_class->byval_arg;
3941 return &mono_defaults.int32_class->byval_arg;
3947 return &mono_defaults.int64_class->byval_arg;
3953 return &mono_defaults.single_class->byval_arg;
3959 return &mono_defaults.double_class->byval_arg;
3965 return &mono_defaults.int_class->byval_arg;
3969 case CEE_LDELEM_REF:
3970 case CEE_STELEM_REF:
3971 return &mono_defaults.object_class->byval_arg;
3974 g_error ("unknown opcode %02x in mono_type_from_opcode ", opcode);
3980 do_load_indirect (VerifyContext *ctx, int opcode)
3983 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3985 if (!check_underflow (ctx, 1))
3988 value = stack_pop (ctx);
3989 if (!stack_slot_is_managed_pointer (value)) {
3990 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Load indirect not using a manager pointer at 0x%04x", ctx->ip_offset));
3991 set_stack_value (ctx, stack_push (ctx), mono_type_from_opcode (opcode), FALSE);
3995 if (opcode == CEE_LDIND_REF) {
3996 if (stack_slot_get_underlying_type (value) != TYPE_COMPLEX || mono_class_from_mono_type (value->type)->valuetype)
3997 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldind_ref expected object byref operation at 0x%04x", ctx->ip_offset));
3998 set_stack_value (ctx, stack_push (ctx), mono_type_get_type_byval (value->type), FALSE);
4000 if (!verify_type_compatibility_full (ctx, mono_type_from_opcode (opcode), mono_type_get_type_byval (value->type), TRUE))
4001 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
4002 set_stack_value (ctx, stack_push (ctx), mono_type_from_opcode (opcode), FALSE);
4007 do_store_indirect (VerifyContext *ctx, int opcode)
4009 ILStackDesc *addr, *val;
4010 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
4012 if (!check_underflow (ctx, 2))
4015 val = stack_pop (ctx);
4016 addr = stack_pop (ctx);
4018 check_unmanaged_pointer (ctx, addr);
4020 if (!stack_slot_is_managed_pointer (addr) && stack_slot_get_type (addr) != TYPE_PTR) {
4021 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid non-pointer argument to stind at 0x%04x", ctx->ip_offset));
4025 if (stack_slot_is_managed_mutability_pointer (addr)) {
4026 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with stind at 0x%04x", ctx->ip_offset));
4030 if (!verify_type_compatibility_full (ctx, mono_type_from_opcode (opcode), mono_type_get_type_byval (addr->type), TRUE))
4031 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid addr type at stack for stind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
4033 if (!verify_stack_type_compatibility (ctx, mono_type_from_opcode (opcode), val))
4034 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value type at stack for stind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
4038 do_newarr (VerifyContext *ctx, int token)
4041 MonoType *type = get_boxable_mono_type (ctx, token, "newarr");
4046 if (!check_underflow (ctx, 1))
4049 value = stack_pop (ctx);
4050 if (stack_slot_get_type (value) != TYPE_I4 && stack_slot_get_type (value) != TYPE_NATIVE_INT)
4051 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));
4053 set_stack_value (ctx, stack_push (ctx), mono_class_get_type (mono_array_class_get (mono_class_from_mono_type (type), 1)), FALSE);
4056 /*FIXME handle arrays that are not 0-indexed*/
4058 do_ldlen (VerifyContext *ctx)
4062 if (!check_underflow (ctx, 1))
4065 value = stack_pop (ctx);
4067 if (stack_slot_get_type (value) != TYPE_COMPLEX || value->type->type != MONO_TYPE_SZARRAY)
4068 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type for ldlen at 0x%04x", ctx->ip_offset));
4070 stack_push_val (ctx, TYPE_NATIVE_INT, &mono_defaults.int_class->byval_arg);
4073 /*FIXME handle arrays that are not 0-indexed*/
4074 /*FIXME handle readonly prefix and CMMP*/
4076 do_ldelema (VerifyContext *ctx, int klass_token)
4078 ILStackDesc *index, *array, *res;
4079 MonoType *type = get_boxable_mono_type (ctx, klass_token, "ldelema");
4085 if (!check_underflow (ctx, 2))
4088 index = stack_pop (ctx);
4089 array = stack_pop (ctx);
4091 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4092 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));
4094 if (!stack_slot_is_null_literal (array)) {
4095 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY)
4096 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type(%s) for ldelema at 0x%04x", stack_slot_get_name (array), ctx->ip_offset));
4098 if (get_stack_type (type) == TYPE_I4 || get_stack_type (type) == TYPE_NATIVE_INT) {
4099 valid = verify_type_compatibility_full (ctx, type, &array->type->data.klass->byval_arg, TRUE);
4101 valid = mono_metadata_type_equal (type, &array->type->data.klass->byval_arg);
4104 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelema at 0x%04x", ctx->ip_offset));
4108 res = stack_push (ctx);
4109 set_stack_value (ctx, res, type, TRUE);
4110 if (ctx->prefix_set & PREFIX_READONLY) {
4111 ctx->prefix_set &= ~PREFIX_READONLY;
4112 res->stype |= CMMP_MASK;
4117 * FIXME handle arrays that are not 0-indexed
4118 * FIXME handle readonly prefix and CMMP
4121 do_ldelem (VerifyContext *ctx, int opcode, int token)
4123 #define IS_ONE_OF2(T, A, B) (T == A || T == B)
4124 ILStackDesc *index, *array;
4126 if (!check_underflow (ctx, 2))
4129 if (opcode == CEE_LDELEM) {
4130 if (!(type = verifier_load_type (ctx, token, "ldelem.any"))) {
4131 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Type (0x%08x) not found at 0x%04x", token, ctx->ip_offset));
4135 type = mono_type_from_opcode (opcode);
4138 index = stack_pop (ctx);
4139 array = stack_pop (ctx);
4141 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4142 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));
4144 if (!stack_slot_is_null_literal (array)) {
4145 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY)
4146 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));
4148 if (opcode == CEE_LDELEM_REF) {
4149 if (array->type->data.klass->valuetype)
4150 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type is not a reference type for ldelem.ref 0x%04x", ctx->ip_offset));
4151 type = &array->type->data.klass->byval_arg;
4153 MonoType *candidate = &array->type->data.klass->byval_arg;
4154 if (IS_STRICT_MODE (ctx)) {
4155 MonoType *underlying_type = mono_type_get_underlying_type_any (type);
4156 MonoType *underlying_candidate = mono_type_get_underlying_type_any (candidate);
4157 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)) ||
4158 (IS_ONE_OF2 (underlying_candidate->type, MONO_TYPE_I4, MONO_TYPE_U4) && IS_ONE_OF2 (underlying_type->type, MONO_TYPE_I, MONO_TYPE_U)))
4159 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelem.X at 0x%04x", ctx->ip_offset));
4161 if (!verify_type_compatibility_full (ctx, type, candidate, TRUE))
4162 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelem.X at 0x%04x", ctx->ip_offset));
4167 set_stack_value (ctx, stack_push (ctx), type, FALSE);
4172 * FIXME handle arrays that are not 0-indexed
4175 do_stelem (VerifyContext *ctx, int opcode, int token)
4177 ILStackDesc *index, *array, *value;
4179 if (!check_underflow (ctx, 3))
4182 if (opcode == CEE_STELEM) {
4183 if (!(type = verifier_load_type (ctx, token, "stelem.any"))) {
4184 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Type (0x%08x) not found at 0x%04x", token, ctx->ip_offset));
4188 type = mono_type_from_opcode (opcode);
4191 value = stack_pop (ctx);
4192 index = stack_pop (ctx);
4193 array = stack_pop (ctx);
4195 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4196 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));
4198 if (!stack_slot_is_null_literal (array)) {
4199 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY) {
4200 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));
4202 if (opcode == CEE_STELEM_REF) {
4203 if (array->type->data.klass->valuetype)
4204 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type is not a reference type for stelem.ref 0x%04x", ctx->ip_offset));
4205 } else if (!verify_type_compatibility_full (ctx, &array->type->data.klass->byval_arg, type, TRUE)) {
4206 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for stdelem.X at 0x%04x", ctx->ip_offset));
4210 if (opcode == CEE_STELEM_REF) {
4211 if (!stack_slot_is_boxed_value (value) && mono_class_from_mono_type (value->type)->valuetype)
4212 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value is not a reference type for stelem.ref 0x%04x", ctx->ip_offset));
4213 } else if (opcode != CEE_STELEM_REF) {
4214 if (!verify_stack_type_compatibility (ctx, type, value))
4215 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value on stack for stdelem.X at 0x%04x", ctx->ip_offset));
4217 if (stack_slot_is_boxed_value (value) && !MONO_TYPE_IS_REFERENCE (value->type) && !MONO_TYPE_IS_REFERENCE (type))
4218 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));
4224 do_throw (VerifyContext *ctx)
4226 ILStackDesc *exception;
4227 if (!check_underflow (ctx, 1))
4229 exception = stack_pop (ctx);
4231 if (!stack_slot_is_null_literal (exception) && !(stack_slot_get_type (exception) == TYPE_COMPLEX && !mono_class_from_mono_type (exception->type)->valuetype))
4232 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type on stack for throw, expected reference type at 0x%04x", ctx->ip_offset));
4234 if (mono_type_is_generic_argument (exception->type) && !stack_slot_is_boxed_value (exception)) {
4235 char *name = mono_type_full_name (exception->type);
4236 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));
4239 /*The stack is left empty after a throw*/
4245 do_endfilter (VerifyContext *ctx)
4247 MonoExceptionClause *clause;
4249 if (IS_STRICT_MODE (ctx)) {
4250 if (ctx->eval.size != 1)
4251 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack size must have one item for endfilter at 0x%04x", ctx->ip_offset));
4253 if (ctx->eval.size >= 1 && stack_slot_get_type (stack_pop (ctx)) != TYPE_I4)
4254 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack item type is not an int32 for endfilter at 0x%04x", ctx->ip_offset));
4257 if ((clause = is_correct_endfilter (ctx, ctx->ip_offset))) {
4258 if (IS_STRICT_MODE (ctx)) {
4259 if (ctx->ip_offset != clause->handler_offset - 2)
4260 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter is not the last instruction of the filter clause at 0x%04x", ctx->ip_offset));
4262 if ((ctx->ip_offset != clause->handler_offset - 2) && !MONO_OFFSET_IN_HANDLER (clause, ctx->ip_offset))
4263 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter is not the last instruction of the filter clause at 0x%04x", ctx->ip_offset));
4266 if (IS_STRICT_MODE (ctx) && !is_unverifiable_endfilter (ctx, ctx->ip_offset))
4267 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter outside filter clause at 0x%04x", ctx->ip_offset));
4269 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("endfilter outside filter clause at 0x%04x", ctx->ip_offset));
4276 do_leave (VerifyContext *ctx, int delta)
4278 int target = ((gint32)ctx->ip_offset) + delta;
4279 if (target >= ctx->code_size || target < 0)
4280 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target out of code at 0x%04x", ctx->ip_offset));
4282 if (!is_correct_leave (ctx->header, ctx->ip_offset, target))
4283 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Leave not allowed in finally block at 0x%04x", ctx->ip_offset));
4285 ctx->target = target;
4291 * Verify br and br.s opcodes.
4294 do_static_branch (VerifyContext *ctx, int delta)
4296 int target = ctx->ip_offset + delta;
4297 if (target < 0 || target >= ctx->code_size) {
4298 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("branch target out of code at 0x%04x", ctx->ip_offset));
4302 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
4304 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
4307 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
4311 ctx->target = target;
4315 do_switch (VerifyContext *ctx, int count, const unsigned char *data)
4317 int i, base = ctx->ip_offset + 5 + count * 4;
4320 if (!check_underflow (ctx, 1))
4323 value = stack_pop (ctx);
4325 if (stack_slot_get_type (value) != TYPE_I4 && stack_slot_get_type (value) != TYPE_NATIVE_INT)
4326 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid argument to switch at 0x%04x", ctx->ip_offset));
4328 for (i = 0; i < count; ++i) {
4329 int target = base + read32 (data + i * 4);
4331 if (target < 0 || target >= ctx->code_size) {
4332 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Switch target %x out of code at 0x%04x", i, ctx->ip_offset));
4336 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
4338 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Switch target %x escapes out of exception block at 0x%04x", i, ctx->ip_offset));
4341 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Switch target %x escapes out of exception block at 0x%04x", i, ctx->ip_offset));
4344 merge_stacks (ctx, &ctx->eval, &ctx->code [target], FALSE, TRUE);
4349 do_load_function_ptr (VerifyContext *ctx, guint32 token, gboolean virtual_)
4354 if (virtual_ && !check_underflow (ctx, 1))
4357 if (!virtual_ && !check_overflow (ctx))
4360 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
4361 method = (MonoMethod *)mono_method_get_wrapper_data (ctx->method, (guint32)token);
4363 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid token %x for ldftn at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4367 if (!IS_METHOD_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
4368 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid token %x for ldftn at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4372 if (!(method = verifier_load_method (ctx, token, virtual_ ? "ldvirtfrn" : "ldftn")))
4376 if (mono_method_is_constructor (method))
4377 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use ldftn with a constructor at 0x%04x", ctx->ip_offset));
4380 ILStackDesc *top = stack_pop (ctx);
4382 if (stack_slot_get_type (top) != TYPE_COMPLEX || top->type->type == MONO_TYPE_VALUETYPE)
4383 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid argument to ldvirtftn at 0x%04x", ctx->ip_offset));
4385 if (method->flags & METHOD_ATTRIBUTE_STATIC)
4386 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use ldvirtftn with a constructor at 0x%04x", ctx->ip_offset));
4388 if (!verify_stack_type_compatibility (ctx, &method->klass->byval_arg, top))
4389 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unexpected object for ldvirtftn at 0x%04x", ctx->ip_offset));
4392 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, NULL))
4393 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);
4395 top = stack_push_val(ctx, TYPE_PTR, mono_type_create_fnptr_from_mono_method (ctx, method));
4396 top->method = method;
4400 do_sizeof (VerifyContext *ctx, int token)
4404 if (!(type = verifier_load_type (ctx, token, "sizeof")))
4407 if (type->byref && type->type != MONO_TYPE_TYPEDBYREF) {
4408 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of byref type at 0x%04x", ctx->ip_offset));
4412 if (type->type == MONO_TYPE_VOID) {
4413 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of void type at 0x%04x", ctx->ip_offset));
4417 if (check_overflow (ctx))
4418 set_stack_value (ctx, stack_push (ctx), &mono_defaults.uint32_class->byval_arg, FALSE);
4421 /* Stack top can be of any type, the runtime doesn't care and treat everything as an int. */
4423 do_localloc (VerifyContext *ctx)
4425 if (ctx->eval.size != 1) {
4426 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack must have only size item in localloc at 0x%04x", ctx->ip_offset));
4430 if (in_any_exception_block (ctx->header, ctx->ip_offset)) {
4431 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack must have only size item in localloc at 0x%04x", ctx->ip_offset));
4435 /*TODO verify top type*/
4436 /* top = */ stack_pop (ctx);
4438 set_stack_value (ctx, stack_push (ctx), &mono_defaults.int_class->byval_arg, FALSE);
4439 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Instruction localloc in never verifiable at 0x%04x", ctx->ip_offset));
4443 do_ldstr (VerifyContext *ctx, guint32 token)
4445 GSList *error = NULL;
4446 if (ctx->method->wrapper_type == MONO_WRAPPER_NONE && !image_is_dynamic (ctx->image)) {
4447 if (mono_metadata_token_code (token) != MONO_TOKEN_STRING) {
4448 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid string token %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4452 if (!mono_verifier_verify_string_signature (ctx->image, mono_metadata_token_index (token), &error)) {
4454 ctx->list = g_slist_concat (ctx->list, error);
4455 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid string index %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4460 if (check_overflow (ctx))
4461 stack_push_val (ctx, TYPE_COMPLEX, &mono_defaults.string_class->byval_arg);
4465 do_refanyval (VerifyContext *ctx, int token)
4469 if (!check_underflow (ctx, 1))
4472 if (!(type = get_boxable_mono_type (ctx, token, "refanyval")))
4475 top = stack_pop (ctx);
4477 if (top->stype != TYPE_PTR || top->type->type != MONO_TYPE_TYPEDBYREF)
4478 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));
4480 set_stack_value (ctx, stack_push (ctx), type, TRUE);
4484 do_refanytype (VerifyContext *ctx)
4488 if (!check_underflow (ctx, 1))
4491 top = stack_pop (ctx);
4493 if (top->stype != TYPE_PTR || top->type->type != MONO_TYPE_TYPEDBYREF)
4494 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));
4496 set_stack_value (ctx, stack_push (ctx), &mono_defaults.typehandle_class->byval_arg, FALSE);
4501 do_mkrefany (VerifyContext *ctx, int token)
4505 if (!check_underflow (ctx, 1))
4508 if (!(type = get_boxable_mono_type (ctx, token, "refanyval")))
4511 top = stack_pop (ctx);
4513 if (stack_slot_is_managed_mutability_pointer (top))
4514 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with mkrefany at 0x%04x", ctx->ip_offset));
4516 if (!stack_slot_is_managed_pointer (top)) {
4517 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));
4519 MonoType *stack_type = mono_type_get_type_byval (top->type);
4520 if (MONO_TYPE_IS_REFERENCE (type) && !mono_metadata_type_equal (type, stack_type))
4521 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type not compatible for mkrefany at 0x%04x", ctx->ip_offset));
4523 if (!MONO_TYPE_IS_REFERENCE (type) && !verify_type_compatibility_full (ctx, type, stack_type, TRUE))
4524 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type not compatible for mkrefany at 0x%04x", ctx->ip_offset));
4527 set_stack_value (ctx, stack_push (ctx), &mono_defaults.typed_reference_class->byval_arg, FALSE);
4531 do_ckfinite (VerifyContext *ctx)
4534 if (!check_underflow (ctx, 1))
4537 top = stack_pop (ctx);
4539 if (stack_slot_get_underlying_type (top) != TYPE_R8)
4540 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));
4541 stack_push_stack_val (ctx, top);
4545 * Merge the stacks and perform compat checks. The merge check if types of @from are mergeable with type of @to
4547 * @from holds new values for a given control path
4548 * @to holds the current values of a given control path
4550 * TODO we can eliminate the from argument as all callers pass &ctx->eval
4553 merge_stacks (VerifyContext *ctx, ILCodeDesc *from, ILCodeDesc *to, gboolean start, gboolean external)
4557 stack_init (ctx, to);
4560 if (to->flags == IL_CODE_FLAG_NOT_PROCESSED)
4563 stack_copy (&ctx->eval, to);
4565 } else if (!(to->flags & IL_CODE_STACK_MERGED)) {
4566 stack_copy (to, &ctx->eval);
4569 VERIFIER_DEBUG ( printf ("performing stack merge %d x %d\n", from->size, to->size); );
4571 if (from->size != to->size) {
4572 VERIFIER_DEBUG ( printf ("different stack sizes %d x %d at 0x%04x\n", from->size, to->size, ctx->ip_offset); );
4573 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));
4577 //FIXME we need to preserve CMMP attributes
4578 //FIXME we must take null literals into consideration.
4579 for (i = 0; i < from->size; ++i) {
4580 ILStackDesc *new_slot = from->stack + i;
4581 ILStackDesc *old_slot = to->stack + i;
4582 MonoType *new_type = mono_type_from_stack_slot (new_slot);
4583 MonoType *old_type = mono_type_from_stack_slot (old_slot);
4584 MonoClass *old_class = mono_class_from_mono_type (old_type);
4585 MonoClass *new_class = mono_class_from_mono_type (new_type);
4586 MonoClass *match_class = NULL;
4588 // S := T then U = S (new value is compatible with current value, keep current)
4589 if (verify_stack_type_compatibility (ctx, old_type, new_slot)) {
4590 copy_stack_value (new_slot, old_slot);
4594 // T := S then U = T (old value is compatible with current value, use new)
4595 if (verify_stack_type_compatibility (ctx, new_type, old_slot)) {
4596 copy_stack_value (old_slot, new_slot);
4600 /*Both slots are the same boxed valuetype. Simply copy it.*/
4601 if (stack_slot_is_boxed_value (old_slot) &&
4602 stack_slot_is_boxed_value (new_slot) &&
4603 mono_metadata_type_equal (old_type, new_type)) {
4604 copy_stack_value (new_slot, old_slot);
4608 if (mono_type_is_generic_argument (old_type) || mono_type_is_generic_argument (new_type)) {
4609 char *old_name = stack_slot_full_name (old_slot);
4610 char *new_name = stack_slot_full_name (new_slot);
4611 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));
4617 //both are reference types, use closest common super type
4618 if (!mono_class_from_mono_type (old_type)->valuetype
4619 && !mono_class_from_mono_type (new_type)->valuetype
4620 && !stack_slot_is_managed_pointer (old_slot)
4621 && !stack_slot_is_managed_pointer (new_slot)) {
4623 mono_class_setup_supertypes (old_class);
4624 mono_class_setup_supertypes (new_class);
4626 for (j = MIN (old_class->idepth, new_class->idepth) - 1; j > 0; --j) {
4627 if (mono_metadata_type_equal (&old_class->supertypes [j]->byval_arg, &new_class->supertypes [j]->byval_arg)) {
4628 match_class = old_class->supertypes [j];
4633 mono_class_setup_interfaces (old_class, &error);
4634 if (!mono_error_ok (&error)) {
4635 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));
4636 mono_error_cleanup (&error);
4639 mono_class_setup_interfaces (new_class, &error);
4640 if (!mono_error_ok (&error)) {
4641 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));
4642 mono_error_cleanup (&error);
4646 /* if old class is an interface that new class implements */
4647 if (mono_class_is_interface (old_class)) {
4648 if (verifier_class_is_assignable_from (old_class, new_class)) {
4649 match_class = old_class;
4652 for (j = 0; j < old_class->interface_count; ++j) {
4653 if (verifier_class_is_assignable_from (old_class->interfaces [j], new_class)) {
4654 match_class = old_class->interfaces [j];
4660 if (mono_class_is_interface (new_class)) {
4661 if (verifier_class_is_assignable_from (new_class, old_class)) {
4662 match_class = new_class;
4665 for (j = 0; j < new_class->interface_count; ++j) {
4666 if (verifier_class_is_assignable_from (new_class->interfaces [j], old_class)) {
4667 match_class = new_class->interfaces [j];
4673 //No decent super type found, use object
4674 match_class = mono_defaults.object_class;
4676 } 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)) {
4677 match_class = mono_defaults.object_class;
4682 char *old_name = stack_slot_full_name (old_slot);
4683 char *new_name = stack_slot_full_name (new_slot);
4684 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));
4688 set_stack_value (ctx, old_slot, &new_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4692 g_assert (match_class);
4693 set_stack_value (ctx, old_slot, &match_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4694 set_stack_value (ctx, new_slot, &match_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4700 to->flags |= IL_CODE_FLAG_WAS_TARGET;
4701 to->flags |= IL_CODE_STACK_MERGED;
4704 #define HANDLER_START(clause) ((clause)->flags == MONO_EXCEPTION_CLAUSE_FILTER ? (clause)->data.filter_offset : clause->handler_offset)
4705 #define IS_CATCH_OR_FILTER(clause) ((clause)->flags == MONO_EXCEPTION_CLAUSE_FILTER || (clause)->flags == MONO_EXCEPTION_CLAUSE_NONE)
4708 * is_clause_in_range :
4710 * Returns TRUE if either the protected block or the handler of @clause is in the @start - @end range.
4713 is_clause_in_range (MonoExceptionClause *clause, guint32 start, guint32 end)
4715 if (clause->try_offset >= start && clause->try_offset < end)
4717 if (HANDLER_START (clause) >= start && HANDLER_START (clause) < end)
4723 * is_clause_inside_range :
4725 * Returns TRUE if @clause lies completely inside the @start - @end range.
4728 is_clause_inside_range (MonoExceptionClause *clause, guint32 start, guint32 end)
4730 if (clause->try_offset < start || (clause->try_offset + clause->try_len) > end)
4732 if (HANDLER_START (clause) < start || (clause->handler_offset + clause->handler_len) > end)
4738 * is_clause_nested :
4740 * Returns TRUE if @nested is nested in @clause.
4743 is_clause_nested (MonoExceptionClause *clause, MonoExceptionClause *nested)
4745 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER && is_clause_inside_range (nested, clause->data.filter_offset, clause->handler_offset))
4747 return is_clause_inside_range (nested, clause->try_offset, clause->try_offset + clause->try_len) ||
4748 is_clause_inside_range (nested, clause->handler_offset, clause->handler_offset + clause->handler_len);
4751 /* Test the relationship between 2 exception clauses. Follow P.1 12.4.2.7 of ECMA
4752 * the each pair of exception must have the following properties:
4753 * - one is fully nested on another (the outer must not be a filter clause) (the nested one must come earlier)
4754 * - completely disjoin (none of the 3 regions of each entry overlap with the other 3)
4755 * - mutual protection (protected block is EXACT the same, handlers are disjoin and all handler are catch or all handler are filter)
4758 verify_clause_relationship (VerifyContext *ctx, MonoExceptionClause *clause, MonoExceptionClause *to_test)
4760 /*clause is nested*/
4761 if (to_test->flags == MONO_EXCEPTION_CLAUSE_FILTER && is_clause_inside_range (clause, to_test->data.filter_offset, to_test->handler_offset)) {
4762 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clause inside filter"));
4766 /*wrong nesting order.*/
4767 if (is_clause_nested (clause, to_test)) {
4768 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Nested exception clause appears after enclosing clause"));
4772 /*mutual protection*/
4773 if (clause->try_offset == to_test->try_offset && clause->try_len == to_test->try_len) {
4774 /*handlers are not disjoint*/
4775 if (is_clause_in_range (to_test, HANDLER_START (clause), clause->handler_offset + clause->handler_len)) {
4776 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception handlers overlap"));
4779 /* handlers are not catch or filter */
4780 if (!IS_CATCH_OR_FILTER (clause) || !IS_CATCH_OR_FILTER (to_test)) {
4781 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clauses with shared protected block are neither catch or filter"));
4788 /*not completelly disjoint*/
4789 if ((is_clause_in_range (to_test, clause->try_offset, clause->try_offset + clause->try_len) ||
4790 is_clause_in_range (to_test, HANDLER_START (clause), clause->handler_offset + clause->handler_len)) && !is_clause_nested (to_test, clause))
4791 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clauses overlap"));
4794 #define code_bounds_check(size) \
4795 if (ADDP_IS_GREATER_OR_OVF (ip, size, end)) {\
4796 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Code overrun starting with 0x%x at 0x%04x", *ip, ctx.ip_offset)); \
4801 mono_opcode_is_prefix (int op)
4804 case MONO_CEE_UNALIGNED_:
4805 case MONO_CEE_VOLATILE_:
4806 case MONO_CEE_TAIL_:
4807 case MONO_CEE_CONSTRAINED_:
4808 case MONO_CEE_READONLY_:
4815 * FIXME: need to distinguish between valid and verifiable.
4816 * Need to keep track of types on the stack.
4817 * Verify types for opcodes.
4820 mono_method_verify (MonoMethod *method, int level)
4823 const unsigned char *ip, *code_start;
4824 const unsigned char *end;
4825 MonoSimpleBasicBlock *bb = NULL, *original_bb = NULL;
4827 int i, n, need_merge = 0, start = 0;
4828 guint ip_offset = 0, prefix = 0;
4829 MonoGenericContext *generic_context = NULL;
4833 VERIFIER_DEBUG ( printf ("Verify IL for method %s %s %s\n", method->klass->name_space, method->klass->name, method->name); );
4835 init_verifier_stats ();
4837 if (method->iflags & (METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL | METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
4838 (method->flags & (METHOD_ATTRIBUTE_PINVOKE_IMPL | METHOD_ATTRIBUTE_ABSTRACT))) {
4842 memset (&ctx, 0, sizeof (VerifyContext));
4844 //FIXME use mono_method_get_signature_full
4845 ctx.signature = mono_method_signature (method);
4846 if (!ctx.signature) {
4847 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Could not decode method signature"));
4849 finish_collect_stats ();
4852 if (!method->is_generic && !mono_class_is_gtd (method->klass) && ctx.signature->has_type_parameters) {
4853 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Method and signature don't match in terms of genericity"));
4854 finish_collect_stats ();
4858 ctx.header = mono_method_get_header_checked (method, &error);
4860 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Could not decode method header due to %s", mono_error_get_message (&error)));
4861 mono_error_cleanup (&error);
4862 finish_collect_stats ();
4865 ctx.method = method;
4866 code_start = ip = ctx.header->code;
4867 end = ip + ctx.header->code_size;
4868 ctx.image = image = method->klass->image;
4871 ctx.max_args = ctx.signature->param_count + ctx.signature->hasthis;
4872 ctx.max_stack = ctx.header->max_stack;
4873 ctx.verifiable = ctx.valid = 1;
4876 ctx.code = g_new (ILCodeDesc, ctx.header->code_size);
4877 ctx.code_size = ctx.header->code_size;
4878 _MEM_ALLOC (sizeof (ILCodeDesc) * ctx.header->code_size);
4880 memset(ctx.code, 0, sizeof (ILCodeDesc) * ctx.header->code_size);
4882 ctx.num_locals = ctx.header->num_locals;
4883 ctx.locals = (MonoType **)g_memdup (ctx.header->locals, sizeof (MonoType*) * ctx.header->num_locals);
4884 _MEM_ALLOC (sizeof (MonoType*) * ctx.header->num_locals);
4886 if (ctx.num_locals > 0 && !ctx.header->init_locals)
4887 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Method with locals variable but without init locals set"));
4889 ctx.params = g_new (MonoType*, ctx.max_args);
4890 _MEM_ALLOC (sizeof (MonoType*) * ctx.max_args);
4892 if (ctx.signature->hasthis)
4893 ctx.params [0] = method->klass->valuetype ? &method->klass->this_arg : &method->klass->byval_arg;
4894 memcpy (ctx.params + ctx.signature->hasthis, ctx.signature->params, sizeof (MonoType *) * ctx.signature->param_count);
4896 if (ctx.signature->is_inflated)
4897 ctx.generic_context = generic_context = mono_method_get_context (method);
4899 if (!generic_context && (mono_class_is_gtd (method->klass) || method->is_generic)) {
4900 if (method->is_generic)
4901 ctx.generic_context = generic_context = &(mono_method_get_generic_container (method)->context);
4903 ctx.generic_context = generic_context = &mono_class_get_generic_container (method->klass)->context;
4906 for (i = 0; i < ctx.num_locals; ++i) {
4907 MonoType *uninflated = ctx.locals [i];
4908 ctx.locals [i] = mono_class_inflate_generic_type_checked (ctx.locals [i], ctx.generic_context, &error);
4909 if (!mono_error_ok (&error)) {
4910 char *name = mono_type_full_name (ctx.locals [i] ? ctx.locals [i] : uninflated);
4911 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid local %d of type %s", i, name));
4913 mono_error_cleanup (&error);
4914 /* we must not free (in cleanup) what was not yet allocated (but only copied) */
4920 for (i = 0; i < ctx.max_args; ++i) {
4921 MonoType *uninflated = ctx.params [i];
4922 ctx.params [i] = mono_class_inflate_generic_type_checked (ctx.params [i], ctx.generic_context, &error);
4923 if (!mono_error_ok (&error)) {
4924 char *name = mono_type_full_name (ctx.params [i] ? ctx.params [i] : uninflated);
4925 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid parameter %d of type %s", i, name));
4927 mono_error_cleanup (&error);
4928 /* we must not free (in cleanup) what was not yet allocated (but only copied) */
4933 stack_init (&ctx, &ctx.eval);
4935 for (i = 0; i < ctx.num_locals; ++i) {
4936 if (!mono_type_is_valid_in_context (&ctx, ctx.locals [i]))
4938 if (get_stack_type (ctx.locals [i]) == TYPE_INV) {
4939 char *name = mono_type_full_name (ctx.locals [i]);
4940 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid local %i of type %s", i, name));
4947 for (i = 0; i < ctx.max_args; ++i) {
4948 if (!mono_type_is_valid_in_context (&ctx, ctx.params [i]))
4951 if (get_stack_type (ctx.params [i]) == TYPE_INV) {
4952 char *name = mono_type_full_name (ctx.params [i]);
4953 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid parameter %i of type %s", i, name));
4962 for (i = 0; i < ctx.header->num_clauses && ctx.valid; ++i) {
4963 MonoExceptionClause *clause = ctx.header->clauses + i;
4964 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); );
4966 if (clause->try_offset > ctx.code_size || ADD_IS_GREATER_OR_OVF (clause->try_offset, clause->try_len, ctx.code_size))
4967 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try clause out of bounds at 0x%04x", clause->try_offset));
4969 if (clause->try_len <= 0)
4970 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try clause len <= 0 at 0x%04x", clause->try_offset));
4972 if (clause->handler_offset > ctx.code_size || ADD_IS_GREATER_OR_OVF (clause->handler_offset, clause->handler_len, ctx.code_size))
4973 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("handler clause out of bounds at 0x%04x", clause->try_offset));
4975 if (clause->handler_len <= 0)
4976 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("handler clause len <= 0 at 0x%04x", clause->try_offset));
4978 if (clause->try_offset < clause->handler_offset && ADD_IS_GREATER_OR_OVF (clause->try_offset, clause->try_len, HANDLER_START (clause)))
4979 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try block (at 0x%04x) includes handler block (at 0x%04x)", clause->try_offset, clause->handler_offset));
4981 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
4982 if (clause->data.filter_offset > ctx.code_size)
4983 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("filter clause out of bounds at 0x%04x", clause->try_offset));
4985 if (clause->data.filter_offset >= clause->handler_offset)
4986 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("filter clause must come before the handler clause at 0x%04x", clause->data.filter_offset));
4989 for (n = i + 1; n < ctx.header->num_clauses && ctx.valid; ++n)
4990 verify_clause_relationship (&ctx, clause, ctx.header->clauses + n);
4995 ctx.code [clause->try_offset].flags |= IL_CODE_FLAG_WAS_TARGET;
4996 if (clause->try_offset + clause->try_len < ctx.code_size)
4997 ctx.code [clause->try_offset + clause->try_len].flags |= IL_CODE_FLAG_WAS_TARGET;
4998 if (clause->handler_offset + clause->handler_len < ctx.code_size)
4999 ctx.code [clause->handler_offset + clause->handler_len].flags |= IL_CODE_FLAG_WAS_TARGET;
5001 if (clause->flags == MONO_EXCEPTION_CLAUSE_NONE) {
5002 if (!clause->data.catch_class) {
5003 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Catch clause %d with invalid type", i));
5006 if (!mono_type_is_valid_in_context (&ctx, &clause->data.catch_class->byval_arg))
5009 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->handler_offset, clause->data.catch_class);
5011 else if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
5012 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->data.filter_offset, mono_defaults.exception_class);
5013 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->handler_offset, mono_defaults.exception_class);
5020 original_bb = bb = mono_basic_block_split (method, &error, ctx.header);
5021 if (!mono_error_ok (&error)) {
5022 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid branch target: %s", mono_error_get_message (&error)));
5023 mono_error_cleanup (&error);
5028 while (ip < end && ctx.valid) {
5030 ip_offset = (guint) (ip - code_start);
5032 const unsigned char *ip_copy = ip;
5035 if (ip_offset > bb->end) {
5036 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or EH block at [0x%04x] targets middle instruction at 0x%04x", bb->end, ip_offset));
5040 if (ip_offset == bb->end)
5043 op_size = mono_opcode_value_and_size (&ip_copy, end, &op);
5044 if (op_size == -1) {
5045 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction %x at 0x%04x", *ip, ip_offset));
5049 if (ADD_IS_GREATER_OR_OVF (ip_offset, op_size, bb->end)) {
5050 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or EH block targets middle of instruction at 0x%04x", ip_offset));
5054 /*Last Instruction*/
5055 if (ip_offset + op_size == bb->end && mono_opcode_is_prefix (op)) {
5056 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));
5061 ctx.ip_offset = ip_offset = (guint) (ip - code_start);
5063 /*We need to check against fallthrou in and out of protected blocks.
5064 * For fallout we check the once a protected block ends, if the start flag is not set.
5065 * Likewise for fallthru in, we check if ip is the start of a protected block and start is not set
5066 * TODO convert these checks to be done using flags and not this loop
5068 for (i = 0; i < ctx.header->num_clauses && ctx.valid; ++i) {
5069 MonoExceptionClause *clause = ctx.header->clauses + i;
5071 if ((clause->try_offset + clause->try_len == ip_offset) && start == 0) {
5072 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallthru off try block at 0x%04x", ip_offset));
5076 if ((clause->handler_offset + clause->handler_len == ip_offset) && start == 0) {
5077 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER)
5078 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("fallout of handler block at 0x%04x", ip_offset));
5080 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallout of handler block at 0x%04x", ip_offset));
5084 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER && clause->handler_offset == ip_offset && start == 0) {
5085 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("fallout of filter block at 0x%04x", ip_offset));
5089 if (clause->handler_offset == ip_offset && start == 0) {
5090 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallthru handler block at 0x%04x", ip_offset));
5094 if (clause->try_offset == ip_offset && ctx.eval.size > 0 && start == 0) {
5095 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Try to enter try block with a non-empty stack at 0x%04x", ip_offset));
5100 /*This must be done after fallthru detection otherwise it won't happen.*/
5102 /*FIXME remove this once we move all bad branch checking code to use BB only*/
5103 ctx.code [ip_offset].flags |= IL_CODE_FLAG_SEEN;
5112 VERIFIER_DEBUG ( printf ("extra merge needed! 0x%04x \n", ctx.target); );
5113 merge_stacks (&ctx, &ctx.eval, &ctx.code [ctx.target], FALSE, TRUE);
5116 merge_stacks (&ctx, &ctx.eval, &ctx.code[ip_offset], start, FALSE);
5119 /*TODO we can fast detect a forward branch or exception block targeting code after prefix, we should fail fast*/
5120 #ifdef MONO_VERIFIER_DEBUG
5123 discode = mono_disasm_code_one (NULL, method, ip, NULL);
5124 discode [strlen (discode) - 1] = 0; /* no \n */
5125 g_print ("[%d] %-29s (%d)\n", ip_offset, discode, ctx.eval.size);
5128 dump_stack_state (&ctx.code [ip_offset]);
5129 dump_stack_state (&ctx.eval);
5142 push_arg (&ctx, *ip - CEE_LDARG_0, FALSE);
5148 code_bounds_check (2);
5149 push_arg (&ctx, ip [1], *ip == CEE_LDARGA_S);
5153 case CEE_ADD_OVF_UN:
5154 do_binop (&ctx, *ip, add_ovf_un_table);
5158 case CEE_SUB_OVF_UN:
5159 do_binop (&ctx, *ip, sub_ovf_un_table);
5166 case CEE_MUL_OVF_UN:
5167 do_binop (&ctx, *ip, bin_ovf_table);
5172 do_binop (&ctx, *ip, add_table);
5177 do_binop (&ctx, *ip, sub_table);
5184 do_binop (&ctx, *ip, bin_op_table);
5193 do_binop (&ctx, *ip, int_bin_op_table);
5200 do_binop (&ctx, *ip, shift_op_table);
5205 if (!check_underflow (&ctx, 1))
5207 stack_pop_safe (&ctx);
5221 /*TODO support definite assignment verification? */
5222 push_local (&ctx, *ip - CEE_LDLOC_0, FALSE);
5230 store_local (&ctx, *ip - CEE_STLOC_0);
5235 code_bounds_check (2);
5236 store_local (&ctx, ip [1]);
5241 code_bounds_check (2);
5242 store_arg (&ctx, ip [1]);
5256 if (check_overflow (&ctx))
5257 stack_push_val (&ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
5262 code_bounds_check (2);
5263 if (check_overflow (&ctx))
5264 stack_push_val (&ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
5269 code_bounds_check (5);
5270 if (check_overflow (&ctx))
5271 stack_push_val (&ctx,TYPE_I4, &mono_defaults.int32_class->byval_arg);
5276 code_bounds_check (9);
5277 if (check_overflow (&ctx))
5278 stack_push_val (&ctx,TYPE_I8, &mono_defaults.int64_class->byval_arg);
5283 code_bounds_check (5);
5284 if (check_overflow (&ctx))
5285 stack_push_val (&ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
5290 code_bounds_check (9);
5291 if (check_overflow (&ctx))
5292 stack_push_val (&ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
5297 if (check_overflow (&ctx))
5298 stack_push_val (&ctx, TYPE_COMPLEX | NULL_LITERAL_MASK, &mono_defaults.object_class->byval_arg);
5304 code_bounds_check (2);
5305 do_branch_op (&ctx, (signed char)ip [1] + 2, cmp_br_eq_op);
5318 code_bounds_check (2);
5319 do_branch_op (&ctx, (signed char)ip [1] + 2, cmp_br_op);
5326 code_bounds_check (5);
5327 do_branch_op (&ctx, (gint32)read32 (ip + 1) + 5, cmp_br_eq_op);
5340 code_bounds_check (5);
5341 do_branch_op (&ctx, (gint32)read32 (ip + 1) + 5, cmp_br_op);
5348 code_bounds_check (2);
5349 push_local (&ctx, ip[1], *ip == CEE_LDLOCA_S);
5354 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5360 if (!check_underflow (&ctx, 1))
5362 if (!check_overflow (&ctx))
5364 top = stack_push (&ctx);
5365 copy_stack_value (top, stack_peek (&ctx, 1));
5371 code_bounds_check (5);
5373 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Eval stack must be empty in jmp at 0x%04x", ip_offset));
5374 /* token = read32 (ip + 1); */
5375 if (in_any_block (ctx.header, ip_offset))
5376 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("jmp cannot escape exception blocks at 0x%04x", ip_offset));
5378 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Intruction jmp is not verifiable at 0x%04x", ctx.ip_offset));
5380 * FIXME: check signature, retval, arguments etc.
5386 code_bounds_check (5);
5387 do_invoke_method (&ctx, read32 (ip + 1), *ip == CEE_CALLVIRT);
5392 code_bounds_check (5);
5393 /* token = read32 (ip + 1); */
5395 * FIXME: check signature, retval, arguments etc.
5396 * FIXME: check requirements for tail call
5398 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Intruction calli is not verifiable at 0x%04x", ctx.ip_offset));
5402 code_bounds_check (2);
5403 do_static_branch (&ctx, (signed char)ip [1] + 2);
5411 code_bounds_check (2);
5412 do_boolean_branch_op (&ctx, (signed char)ip [1] + 2);
5418 code_bounds_check (5);
5419 do_static_branch (&ctx, (gint32)read32 (ip + 1) + 5);
5427 code_bounds_check (5);
5428 do_boolean_branch_op (&ctx, (gint32)read32 (ip + 1) + 5);
5435 code_bounds_check (5);
5436 entries = read32 (ip + 1);
5438 if (entries > 0xFFFFFFFFU / sizeof (guint32))
5439 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Too many switch entries %x at 0x%04x", entries, ctx.ip_offset));
5442 code_bounds_check (sizeof (guint32) * entries);
5444 do_switch (&ctx, entries, ip);
5445 ip += sizeof (guint32) * entries;
5459 do_load_indirect (&ctx, *ip);
5471 do_store_indirect (&ctx, *ip);
5477 do_unary_math_op (&ctx, *ip);
5487 do_conversion (&ctx, TYPE_I4);
5493 do_conversion (&ctx, TYPE_I8);
5500 do_conversion (&ctx, TYPE_R8);
5506 do_conversion (&ctx, TYPE_NATIVE_INT);
5511 code_bounds_check (5);
5512 do_cpobj (&ctx, read32 (ip + 1));
5517 code_bounds_check (5);
5518 do_ldobj_value (&ctx, read32 (ip + 1));
5523 code_bounds_check (5);
5524 do_ldstr (&ctx, read32 (ip + 1));
5529 code_bounds_check (5);
5530 do_newobj (&ctx, read32 (ip + 1));
5536 code_bounds_check (5);
5537 do_cast (&ctx, read32 (ip + 1), *ip == CEE_CASTCLASS ? "castclass" : "isinst");
5543 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5548 code_bounds_check (5);
5549 do_unbox_value (&ctx, read32 (ip + 1));
5561 code_bounds_check (5);
5562 do_push_field (&ctx, read32 (ip + 1), *ip == CEE_LDFLDA);
5568 code_bounds_check (5);
5569 do_push_static_field (&ctx, read32 (ip + 1), *ip == CEE_LDSFLDA);
5574 code_bounds_check (5);
5575 do_store_field (&ctx, read32 (ip + 1));
5580 code_bounds_check (5);
5581 do_store_static_field (&ctx, read32 (ip + 1));
5586 code_bounds_check (5);
5587 do_stobj (&ctx, read32 (ip + 1));
5591 case CEE_CONV_OVF_I1_UN:
5592 case CEE_CONV_OVF_I2_UN:
5593 case CEE_CONV_OVF_I4_UN:
5594 case CEE_CONV_OVF_U1_UN:
5595 case CEE_CONV_OVF_U2_UN:
5596 case CEE_CONV_OVF_U4_UN:
5597 do_conversion (&ctx, TYPE_I4);
5601 case CEE_CONV_OVF_I8_UN:
5602 case CEE_CONV_OVF_U8_UN:
5603 do_conversion (&ctx, TYPE_I8);
5607 case CEE_CONV_OVF_I_UN:
5608 case CEE_CONV_OVF_U_UN:
5609 do_conversion (&ctx, TYPE_NATIVE_INT);
5614 code_bounds_check (5);
5615 do_box_value (&ctx, read32 (ip + 1));
5620 code_bounds_check (5);
5621 do_newarr (&ctx, read32 (ip + 1));
5631 code_bounds_check (5);
5632 do_ldelema (&ctx, read32 (ip + 1));
5646 case CEE_LDELEM_REF:
5647 do_ldelem (&ctx, *ip, 0);
5658 case CEE_STELEM_REF:
5659 do_stelem (&ctx, *ip, 0);
5664 code_bounds_check (5);
5665 do_ldelem (&ctx, *ip, read32 (ip + 1));
5670 code_bounds_check (5);
5671 do_stelem (&ctx, *ip, read32 (ip + 1));
5676 code_bounds_check (5);
5677 do_unbox_any (&ctx, read32 (ip + 1));
5681 case CEE_CONV_OVF_I1:
5682 case CEE_CONV_OVF_U1:
5683 case CEE_CONV_OVF_I2:
5684 case CEE_CONV_OVF_U2:
5685 case CEE_CONV_OVF_I4:
5686 case CEE_CONV_OVF_U4:
5687 do_conversion (&ctx, TYPE_I4);
5691 case CEE_CONV_OVF_I8:
5692 case CEE_CONV_OVF_U8:
5693 do_conversion (&ctx, TYPE_I8);
5697 case CEE_CONV_OVF_I:
5698 case CEE_CONV_OVF_U:
5699 do_conversion (&ctx, TYPE_NATIVE_INT);
5704 code_bounds_check (5);
5705 do_refanyval (&ctx, read32 (ip + 1));
5715 code_bounds_check (5);
5716 do_mkrefany (&ctx, read32 (ip + 1));
5721 code_bounds_check (5);
5722 do_load_token (&ctx, read32 (ip + 1));
5726 case CEE_ENDFINALLY:
5727 if (!is_correct_endfinally (ctx.header, ip_offset))
5728 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("endfinally must be used inside a finally/fault handler at 0x%04x", ctx.ip_offset));
5735 code_bounds_check (5);
5736 do_leave (&ctx, read32 (ip + 1) + 5);
5743 code_bounds_check (2);
5744 do_leave (&ctx, (signed char)ip [1] + 2);
5751 code_bounds_check (2);
5755 code_bounds_check (3);
5756 store_local (&ctx, read16 (ip + 1));
5761 do_cmp_op (&ctx, cmp_br_eq_op, *ip);
5769 do_cmp_op (&ctx, cmp_br_op, *ip);
5774 code_bounds_check (3);
5775 store_arg (&ctx, read16 (ip + 1) );
5781 if (!check_overflow (&ctx))
5783 if (ctx.signature->call_convention != MONO_CALL_VARARG)
5784 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Cannot use arglist on method without VARGARG calling convention at 0x%04x", ctx.ip_offset));
5785 set_stack_value (&ctx, stack_push (&ctx), &mono_defaults.argumenthandle_class->byval_arg, FALSE);
5790 code_bounds_check (5);
5791 do_load_function_ptr (&ctx, read32 (ip + 1), FALSE);
5796 code_bounds_check (5);
5797 do_load_function_ptr (&ctx, read32 (ip + 1), TRUE);
5803 code_bounds_check (3);
5804 push_arg (&ctx, read16 (ip + 1), *ip == CEE_LDARGA);
5810 code_bounds_check (3);
5811 push_local (&ctx, read16 (ip + 1), *ip == CEE_LDLOCA);
5824 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5828 do_endfilter (&ctx);
5832 case CEE_UNALIGNED_:
5833 code_bounds_check (2);
5834 prefix |= PREFIX_UNALIGNED;
5838 prefix |= PREFIX_VOLATILE;
5842 prefix |= PREFIX_TAIL;
5844 if (ip < end && (*ip != CEE_CALL && *ip != CEE_CALLI && *ip != CEE_CALLVIRT))
5845 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("tail prefix must be used only with call opcodes at 0x%04x", ip_offset));
5849 code_bounds_check (5);
5850 do_initobj (&ctx, read32 (ip + 1));
5854 case CEE_CONSTRAINED_:
5855 code_bounds_check (5);
5856 ctx.constrained_type = get_boxable_mono_type (&ctx, read32 (ip + 1), "constrained.");
5857 prefix |= PREFIX_CONSTRAINED;
5862 prefix |= PREFIX_READONLY;
5867 CLEAR_PREFIX (&ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
5868 if (!check_underflow (&ctx, 3))
5870 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Instruction cpblk is not verifiable at 0x%04x", ctx.ip_offset));
5875 CLEAR_PREFIX (&ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
5876 if (!check_underflow (&ctx, 3))
5878 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Instruction initblk is not verifiable at 0x%04x", ctx.ip_offset));
5886 if (!is_correct_rethrow (ctx.header, ip_offset))
5887 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("rethrow must be used inside a catch handler at 0x%04x", ctx.ip_offset));
5894 code_bounds_check (5);
5895 do_sizeof (&ctx, read32 (ip + 1));
5899 case CEE_REFANYTYPE:
5900 do_refanytype (&ctx);
5905 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction FE %x at 0x%04x", *ip, ctx.ip_offset));
5911 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction %x at 0x%04x", *ip, ctx.ip_offset));
5915 /*TODO we can fast detect a forward branch or exception block targeting code after prefix, we should fail fast*/
5917 if (!ctx.prefix_set) //first prefix
5918 ctx.code [ctx.ip_offset].flags |= IL_CODE_FLAG_SEEN;
5919 ctx.prefix_set |= prefix;
5920 ctx.has_flags = TRUE;
5924 ctx.code [ctx.ip_offset].flags |= IL_CODE_FLAG_SEEN;
5926 if (ctx.prefix_set & PREFIX_CONSTRAINED)
5927 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after constrained prefix at 0x%04x", ctx.ip_offset));
5928 if (ctx.prefix_set & PREFIX_READONLY)
5929 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after readonly prefix at 0x%04x", ctx.ip_offset));
5930 if (ctx.prefix_set & PREFIX_VOLATILE)
5931 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after volatile prefix at 0x%04x", ctx.ip_offset));
5932 if (ctx.prefix_set & PREFIX_UNALIGNED)
5933 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after unaligned prefix at 0x%04x", ctx.ip_offset));
5934 ctx.prefix_set = prefix = 0;
5935 ctx.has_flags = FALSE;
5939 * if ip != end we overflowed: mark as error.
5941 if ((ip != end || !start) && ctx.verifiable && !ctx.list) {
5942 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Run ahead of method code at 0x%04x", ip_offset));
5945 /*We should guard against the last decoded opcode, otherwise we might add errors that doesn't make sense.*/
5946 for (i = 0; i < ctx.code_size && i < ip_offset; ++i) {
5947 if (ctx.code [i].flags & IL_CODE_FLAG_WAS_TARGET) {
5948 if (!(ctx.code [i].flags & IL_CODE_FLAG_SEEN))
5949 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or exception block target middle of intruction at 0x%04x", i));
5951 if (ctx.code [i].flags & IL_CODE_DELEGATE_SEQUENCE)
5952 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Branch to delegate code sequence at 0x%04x", i));
5954 if ((ctx.code [i].flags & IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL) && ctx.has_this_store)
5955 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Invalid ldftn with virtual function in method with stdarg 0 at 0x%04x", i));
5957 if ((ctx.code [i].flags & IL_CODE_CALL_NONFINAL_VIRTUAL) && ctx.has_this_store)
5958 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));
5961 if (mono_method_is_constructor (ctx.method) && !ctx.super_ctor_called && !ctx.method->klass->valuetype && ctx.method->klass != mono_defaults.object_class) {
5962 char *method_name = mono_method_full_name (ctx.method, TRUE);
5963 char *type = mono_type_get_full_name (ctx.method->klass);
5964 if (ctx.method->klass->parent && mono_class_has_failure (ctx.method->klass->parent))
5965 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));
5967 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Constructor %s for type %s not calling base type ctor.", method_name, type));
5968 g_free (method_name);
5974 for (i = 0; i < ctx.header->code_size; ++i) {
5975 if (ctx.code [i].stack)
5976 g_free (ctx.code [i].stack);
5980 for (tmp = ctx.funptrs; tmp; tmp = tmp->next)
5982 g_slist_free (ctx.funptrs);
5984 for (tmp = ctx.exception_types; tmp; tmp = tmp->next)
5985 mono_metadata_free_type ((MonoType *)tmp->data);
5986 g_slist_free (ctx.exception_types);
5988 for (i = 0; i < ctx.num_locals; ++i) {
5990 mono_metadata_free_type (ctx.locals [i]);
5992 for (i = 0; i < ctx.max_args; ++i) {
5994 mono_metadata_free_type (ctx.params [i]);
5998 g_free (ctx.eval.stack);
6001 g_free (ctx.locals);
6002 g_free (ctx.params);
6003 mono_basic_block_free (original_bb);
6004 mono_metadata_free_mh (ctx.header);
6006 finish_collect_stats ();
6011 mono_verify_corlib ()
6013 /* This is a public API function so cannot be removed */
6018 * mono_verifier_is_enabled_for_method:
6019 * @method: the method to probe
6021 * Returns TRUE if @method needs to be verified.
6025 mono_verifier_is_enabled_for_method (MonoMethod *method)
6027 return mono_verifier_is_enabled_for_class (method->klass) && (method->wrapper_type == MONO_WRAPPER_NONE || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD);
6031 * mono_verifier_is_enabled_for_class:
6032 * @klass: The `MonoClass` to probe
6034 * Returns TRUE if @klass need to be verified.
6038 mono_verifier_is_enabled_for_class (MonoClass *klass)
6040 return verify_all || (verifier_mode > MONO_VERIFIER_MODE_OFF && !(klass->image->assembly && klass->image->assembly->in_gac) && klass->image != mono_defaults.corlib);
6044 mono_verifier_is_enabled_for_image (MonoImage *image)
6046 return verify_all || verifier_mode > MONO_VERIFIER_MODE_OFF;
6050 * Dynamic methods are not considered full trust since if the user is trusted and need to
6051 * generate unsafe code, make the method skip verification - this is a known good way to do it.
6054 mono_verifier_is_method_full_trust (MonoMethod *method)
6056 return mono_verifier_is_class_full_trust (method->klass) && !method_is_dynamic (method);
6060 * Returns if @klass is under full trust or not.
6062 * TODO This code doesn't take CAS into account.
6064 * Under verify_all all user code must be verifiable if no security option was set
6068 mono_verifier_is_class_full_trust (MonoClass *klass)
6070 /* under CoreCLR code is trusted if it is part of the "platform" otherwise all code inside the GAC is trusted */
6071 gboolean trusted_location = !mono_security_core_clr_enabled () ?
6072 (klass->image->assembly && klass->image->assembly->in_gac) : mono_security_core_clr_is_platform_image (klass->image);
6074 if (verify_all && verifier_mode == MONO_VERIFIER_MODE_OFF)
6075 return trusted_location || klass->image == mono_defaults.corlib;
6076 return verifier_mode < MONO_VERIFIER_MODE_VERIFIABLE || trusted_location || klass->image == mono_defaults.corlib;
6080 mono_method_verify_with_current_settings (MonoMethod *method, gboolean skip_visibility, gboolean is_fulltrust)
6082 return mono_method_verify (method,
6083 (verifier_mode != MONO_VERIFIER_MODE_STRICT ? MONO_VERIFY_NON_STRICT: 0)
6084 | (!is_fulltrust && !mono_verifier_is_method_full_trust (method) ? MONO_VERIFY_FAIL_FAST : 0)
6085 | (skip_visibility ? MONO_VERIFY_SKIP_VISIBILITY : 0));
6089 get_field_end (MonoClassField *field)
6092 int size = mono_type_size (field->type, &align);
6094 size = 4; /*FIXME Is this a safe bet?*/
6095 return size + field->offset;
6099 verify_class_for_overlapping_reference_fields (MonoClass *klass)
6102 gpointer iter = NULL;
6103 MonoClassField *field;
6104 gboolean is_fulltrust = mono_verifier_is_class_full_trust (klass);
6105 /*We can't skip types with !has_references since this is calculated after we have run.*/
6106 if (!mono_class_is_explicit_layout (klass))
6110 /*We must check for stuff overlapping reference fields.
6111 The outer loop uses mono_class_get_fields to ensure that MonoClass:fields get inited.
6113 while ((field = mono_class_get_fields (klass, &iter))) {
6114 int fieldEnd = get_field_end (field);
6115 gboolean is_valuetype = !MONO_TYPE_IS_REFERENCE (field->type);
6118 if (mono_field_is_deleted (field) || (field->type->attrs & FIELD_ATTRIBUTE_STATIC))
6121 int fcount = mono_class_get_field_count (klass);
6122 for (j = i; j < fcount; ++j) {
6123 MonoClassField *other = &klass->fields [j];
6124 int otherEnd = get_field_end (other);
6125 if (mono_field_is_deleted (other) || (is_valuetype && !MONO_TYPE_IS_REFERENCE (other->type)) || (other->type->attrs & FIELD_ATTRIBUTE_STATIC))
6128 if (!is_valuetype && MONO_TYPE_IS_REFERENCE (other->type) && field->offset == other->offset && is_fulltrust)
6131 if ((otherEnd > field->offset && otherEnd <= fieldEnd) || (other->offset >= field->offset && other->offset < fieldEnd))
6139 field_hash (gconstpointer key)
6141 const MonoClassField *field = (const MonoClassField *)key;
6142 return g_str_hash (field->name) ^ mono_metadata_type_hash (field->type); /**/
6146 field_equals (gconstpointer _a, gconstpointer _b)
6148 const MonoClassField *a = (const MonoClassField *)_a;
6149 const MonoClassField *b = (const MonoClassField *)_b;
6150 return !strcmp (a->name, b->name) && mono_metadata_type_equal (a->type, b->type);
6155 verify_class_fields (MonoClass *klass)
6157 gpointer iter = NULL;
6158 MonoClassField *field;
6159 MonoGenericContext *context = mono_class_get_context (klass);
6160 GHashTable *unique_fields = g_hash_table_new_full (&field_hash, &field_equals, NULL, NULL);
6161 if (mono_class_is_gtd (klass))
6162 context = &mono_class_get_generic_container (klass)->context;
6164 while ((field = mono_class_get_fields (klass, &iter)) != NULL) {
6165 if (!mono_type_is_valid_type_in_context (field->type, context)) {
6166 g_hash_table_destroy (unique_fields);
6169 if (g_hash_table_lookup (unique_fields, field)) {
6170 g_hash_table_destroy (unique_fields);
6173 g_hash_table_insert (unique_fields, field, field);
6175 g_hash_table_destroy (unique_fields);
6180 verify_interfaces (MonoClass *klass)
6183 for (i = 0; i < klass->interface_count; ++i) {
6184 MonoClass *iface = klass->interfaces [i];
6185 if (!mono_class_get_flags (iface))
6192 verify_valuetype_layout_with_target (MonoClass *klass, MonoClass *target_class)
6195 gpointer iter = NULL;
6196 MonoClassField *field;
6197 MonoClass *field_class;
6199 if (!klass->valuetype)
6202 type = klass->byval_arg.type;
6203 /*primitive type fields are not properly decoded*/
6204 if ((type >= MONO_TYPE_BOOLEAN && type <= MONO_TYPE_R8) || (type >= MONO_TYPE_I && type <= MONO_TYPE_U))
6207 while ((field = mono_class_get_fields (klass, &iter)) != NULL) {
6211 if (field->type->attrs & (FIELD_ATTRIBUTE_STATIC | FIELD_ATTRIBUTE_HAS_FIELD_RVA))
6214 field_class = mono_class_get_generic_type_definition (mono_class_from_mono_type (field->type));
6216 if (field_class == target_class || klass == field_class || !verify_valuetype_layout_with_target (field_class, target_class))
6224 verify_valuetype_layout (MonoClass *klass)
6227 res = verify_valuetype_layout_with_target (klass, klass);
6232 recursive_mark_constraint_args (MonoBitSet *used_args, MonoGenericContainer *gc, MonoType *type)
6235 MonoClass **constraints;
6236 MonoGenericParamInfo *param_info;
6238 g_assert (mono_type_is_generic_argument (type));
6240 idx = mono_type_get_generic_param_num (type);
6241 if (mono_bitset_test_fast (used_args, idx))
6244 mono_bitset_set_fast (used_args, idx);
6245 param_info = mono_generic_container_get_param_info (gc, idx);
6247 if (!param_info->constraints)
6250 for (constraints = param_info->constraints; *constraints; ++constraints) {
6251 MonoClass *ctr = *constraints;
6252 MonoType *constraint_type = &ctr->byval_arg;
6254 if (mono_type_is_generic_argument (constraint_type) && !recursive_mark_constraint_args (used_args, gc, constraint_type))
6261 verify_generic_parameters (MonoClass *klass)
6264 MonoGenericContainer *gc = mono_class_get_generic_container (klass);
6265 MonoBitSet *used_args = mono_bitset_new (gc->type_argc, 0);
6267 for (i = 0; i < gc->type_argc; ++i) {
6268 MonoGenericParamInfo *param_info = mono_generic_container_get_param_info (gc, i);
6269 MonoClass **constraints;
6271 if (!param_info->constraints)
6274 mono_bitset_clear_all (used_args);
6275 mono_bitset_set_fast (used_args, i);
6277 for (constraints = param_info->constraints; *constraints; ++constraints) {
6278 MonoClass *ctr = *constraints;
6279 MonoType *constraint_type = &ctr->byval_arg;
6281 if (!mono_class_can_access_class (klass, ctr))
6284 if (!mono_type_is_valid_type_in_context (constraint_type, &gc->context))
6287 if (mono_type_is_generic_argument (constraint_type) && !recursive_mark_constraint_args (used_args, gc, constraint_type))
6289 if (mono_class_is_ginst (ctr) && !mono_class_is_valid_generic_instantiation (NULL, ctr))
6293 mono_bitset_free (used_args);
6297 mono_bitset_free (used_args);
6302 * Check if the class is verifiable.
6304 * Right now there are no conditions that make a class a valid but not verifiable. Both overlapping reference
6305 * field and invalid generic instantiation are fatal errors.
6307 * This method must be safe to be called from mono_class_init and all code must be carefull about that.
6311 mono_verifier_verify_class (MonoClass *klass)
6313 /*Neither <Module>, object or ifaces have parent.*/
6314 if (!klass->parent &&
6315 klass != mono_defaults.object_class &&
6316 !MONO_CLASS_IS_INTERFACE (klass) &&
6317 (!image_is_dynamic (klass->image) && klass->type_token != 0x2000001)) /*<Module> is the first type in the assembly*/
6319 if (klass->parent) {
6320 if (MONO_CLASS_IS_INTERFACE (klass->parent))
6322 if (!mono_class_is_ginst (klass) && mono_class_is_gtd (klass->parent))
6324 if (mono_class_is_ginst (klass->parent) && !mono_class_is_ginst (klass)) {
6325 MonoGenericContext *context = mono_class_get_context (klass);
6326 if (mono_class_is_gtd (klass))
6327 context = &mono_class_get_generic_container (klass)->context;
6328 if (!mono_type_is_valid_type_in_context (&klass->parent->byval_arg, context))
6332 if (mono_class_is_gtd (klass) && (mono_class_is_explicit_layout (klass)))
6334 if (mono_class_is_gtd (klass) && !verify_generic_parameters (klass))
6336 if (!verify_class_for_overlapping_reference_fields (klass))
6338 if (mono_class_is_ginst (klass) && !mono_class_is_valid_generic_instantiation (NULL, klass))
6340 if (!mono_class_is_ginst (klass) && !verify_class_fields (klass))
6342 if (klass->valuetype && !verify_valuetype_layout (klass))
6344 if (!verify_interfaces (klass))
6350 mono_verifier_class_is_valid_generic_instantiation (MonoClass *klass)
6352 return mono_class_is_valid_generic_instantiation (NULL, klass);
6356 mono_verifier_is_method_valid_generic_instantiation (MonoMethod *method)
6358 if (!method->is_inflated)
6360 return mono_method_is_valid_generic_instantiation (NULL, method);
6366 mono_verifier_verify_class (MonoClass *klass)
6368 /* The verifier was disabled at compile time */
6373 mono_method_verify_with_current_settings (MonoMethod *method, gboolean skip_visibility, gboolean is_fulltrust)
6375 /* The verifier was disabled at compile time */
6380 mono_verifier_is_class_full_trust (MonoClass *klass)
6382 /* The verifier was disabled at compile time */
6387 mono_verifier_is_method_full_trust (MonoMethod *method)
6389 /* The verifier was disabled at compile time */
6394 mono_verifier_is_enabled_for_image (MonoImage *image)
6396 /* The verifier was disabled at compile time */
6401 mono_verifier_is_enabled_for_class (MonoClass *klass)
6403 /* The verifier was disabled at compile time */
6408 mono_verifier_is_enabled_for_method (MonoMethod *method)
6410 /* The verifier was disabled at compile time */
6415 mono_method_verify (MonoMethod *method, int level)
6417 /* The verifier was disabled at compile time */
6422 mono_free_verify_list (GSList *list)
6424 /* The verifier was disabled at compile time */
6425 /* will always be null if verifier is disabled */
6429 mono_verifier_class_is_valid_generic_instantiation (MonoClass *klass)
6435 mono_verifier_is_method_valid_generic_instantiation (MonoMethod *method)