5 * Mono Project (http://www.mono-project.com)
7 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
8 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
9 * Copyright 2011 Rodrigo Kumpera
13 #include <mono/metadata/object-internals.h>
14 #include <mono/metadata/verify.h>
15 #include <mono/metadata/verify-internals.h>
16 #include <mono/metadata/opcodes.h>
17 #include <mono/metadata/tabledefs.h>
18 #include <mono/metadata/reflection.h>
19 #include <mono/metadata/debug-helpers.h>
20 #include <mono/metadata/mono-endian.h>
21 #include <mono/metadata/metadata.h>
22 #include <mono/metadata/metadata-internals.h>
23 #include <mono/metadata/class-internals.h>
24 #include <mono/metadata/security-manager.h>
25 #include <mono/metadata/security-core-clr.h>
26 #include <mono/metadata/tokentype.h>
27 #include <mono/metadata/mono-basic-block.h>
28 #include <mono/metadata/attrdefs.h>
29 #include <mono/metadata/class-internals.h>
30 #include <mono/utils/mono-counters.h>
31 #include <mono/utils/monobitset.h>
35 static MiniVerifierMode verifier_mode = MONO_VERIFIER_MODE_OFF;
36 static gboolean verify_all = FALSE;
39 * Set the desired level of checks for the verfier.
43 mono_verifier_set_mode (MiniVerifierMode mode)
49 mono_verifier_enable_verify_all ()
54 #ifndef DISABLE_VERIFIER
56 * Pull the list of opcodes
58 #define OPDEF(a,b,c,d,e,f,g,h,i,j) \
62 #include "mono/cil/opcode.def"
67 #ifdef MONO_VERIFIER_DEBUG
68 #define VERIFIER_DEBUG(code) do { code } while (0)
70 #define VERIFIER_DEBUG(code)
73 //////////////////////////////////////////////////////////////////
74 #define IS_STRICT_MODE(ctx) (((ctx)->level & MONO_VERIFY_NON_STRICT) == 0)
75 #define IS_FAIL_FAST_MODE(ctx) (((ctx)->level & MONO_VERIFY_FAIL_FAST) == MONO_VERIFY_FAIL_FAST)
76 #define IS_SKIP_VISIBILITY(ctx) (((ctx)->level & MONO_VERIFY_SKIP_VISIBILITY) == MONO_VERIFY_SKIP_VISIBILITY)
77 #define IS_REPORT_ALL_ERRORS(ctx) (((ctx)->level & MONO_VERIFY_REPORT_ALL_ERRORS) == MONO_VERIFY_REPORT_ALL_ERRORS)
78 #define CLEAR_PREFIX(ctx, prefix) do { (ctx)->prefix_set &= ~(prefix); } while (0)
79 #define ADD_VERIFY_INFO(__ctx, __msg, __status, __exception) \
81 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
82 vinfo->info.status = __status; \
83 vinfo->info.message = ( __msg ); \
84 vinfo->exception_type = (__exception); \
85 (__ctx)->list = g_slist_prepend ((__ctx)->list, vinfo); \
88 //TODO support MONO_VERIFY_REPORT_ALL_ERRORS
89 #define ADD_VERIFY_ERROR(__ctx, __msg) \
91 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_ERROR, MONO_EXCEPTION_INVALID_PROGRAM); \
95 #define CODE_NOT_VERIFIABLE(__ctx, __msg) \
97 if ((__ctx)->verifiable || IS_REPORT_ALL_ERRORS (__ctx)) { \
98 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_NOT_VERIFIABLE, MONO_EXCEPTION_UNVERIFIABLE_IL); \
99 (__ctx)->verifiable = 0; \
100 if (IS_FAIL_FAST_MODE (__ctx)) \
101 (__ctx)->valid = 0; \
105 #define ADD_VERIFY_ERROR2(__ctx, __msg, __exception) \
107 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_ERROR, __exception); \
108 (__ctx)->valid = 0; \
111 #define CODE_NOT_VERIFIABLE2(__ctx, __msg, __exception) \
113 if ((__ctx)->verifiable || IS_REPORT_ALL_ERRORS (__ctx)) { \
114 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_NOT_VERIFIABLE, __exception); \
115 (__ctx)->verifiable = 0; \
116 if (IS_FAIL_FAST_MODE (__ctx)) \
117 (__ctx)->valid = 0; \
121 #define CHECK_ADD4_OVERFLOW_UN(a, b) ((guint32)(0xFFFFFFFFU) - (guint32)(b) < (guint32)(a))
122 #define CHECK_ADD8_OVERFLOW_UN(a, b) ((guint64)(0xFFFFFFFFFFFFFFFFUL) - (guint64)(b) < (guint64)(a))
124 #if SIZEOF_VOID_P == 4
125 #define CHECK_ADDP_OVERFLOW_UN(a,b) CHECK_ADD4_OVERFLOW_UN(a, b)
127 #define CHECK_ADDP_OVERFLOW_UN(a,b) CHECK_ADD8_OVERFLOW_UN(a, b)
130 #define ADDP_IS_GREATER_OR_OVF(a, b, c) (((a) + (b) > (c)) || CHECK_ADDP_OVERFLOW_UN (a, b))
131 #define ADD_IS_GREATER_OR_OVF(a, b, c) (((a) + (b) > (c)) || CHECK_ADD4_OVERFLOW_UN (a, b))
133 /*Flags to be used with ILCodeDesc::flags */
135 /*Instruction has not been processed.*/
136 IL_CODE_FLAG_NOT_PROCESSED = 0,
137 /*Instruction was decoded by mono_method_verify loop.*/
138 IL_CODE_FLAG_SEEN = 1,
139 /*Instruction was target of a branch or is at a protected block boundary.*/
140 IL_CODE_FLAG_WAS_TARGET = 2,
141 /*Used by stack_init to avoid double initialize each entry.*/
142 IL_CODE_FLAG_STACK_INITED = 4,
143 /*Used by merge_stacks to decide if it should just copy the eval stack.*/
144 IL_CODE_STACK_MERGED = 8,
145 /*This instruction is part of the delegate construction sequence, it cannot be target of a branch.*/
146 IL_CODE_DELEGATE_SEQUENCE = 0x10,
147 /*This is a delegate created from a ldftn to a non final virtual method*/
148 IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL = 0x20,
149 /*This is a call to a non final virtual method*/
150 IL_CODE_CALL_NONFINAL_VIRTUAL = 0x40,
168 guint16 size, max_size;
185 /*Allocated fnptr MonoType that should be freed by us.*/
187 /*Type dup'ed exception types from catch blocks.*/
188 GSList *exception_types;
193 /*TODO get rid of target here, need_merge in mono_method_verify and hoist the merging code in the branching code*/
197 MonoMethodSignature *signature;
198 MonoMethodHeader *header;
200 MonoGenericContext *generic_context;
204 /*This flag helps solving a corner case of delegate verification in that you cannot have a "starg 0"
205 *on a method that creates a delegate for a non-final virtual method using ldftn*/
206 gboolean has_this_store;
208 /*This flag is used to control if the contructor of the parent class has been called.
209 *If the this pointer is pushed on the eval stack and it's a reference type constructor and
210 * super_ctor_called is false, the uninitialized flag is set on the pushed value.
212 * Poping an uninitialized this ptr from the eval stack is an unverifiable operation unless
213 * the safe variant is used. Only a few opcodes can use it : dup, pop, ldfld, stfld and call to a constructor.
215 gboolean super_ctor_called;
219 MonoType *constrained_type;
223 merge_stacks (VerifyContext *ctx, ILCodeDesc *from, ILCodeDesc *to, gboolean start, gboolean external);
226 get_stack_type (MonoType *type);
229 mono_delegate_signature_equal (MonoMethodSignature *delegate_sig, MonoMethodSignature *method_sig, gboolean is_static_ldftn);
232 mono_class_is_valid_generic_instantiation (VerifyContext *ctx, MonoClass *klass);
235 mono_method_is_valid_generic_instantiation (VerifyContext *ctx, MonoMethod *method);
237 static MonoGenericParam*
238 verifier_get_generic_param_from_type (VerifyContext *ctx, MonoType *type);
241 verifier_class_is_assignable_from (MonoClass *target, MonoClass *candidate);
242 //////////////////////////////////////////////////////////////////
247 TYPE_INV = 0, /* leave at 0. */
252 /* Used by operator tables to resolve pointer types (managed & unmanaged) and by unmanaged pointer types*/
254 /* value types and classes */
256 /* Number of types, used to define the size of the tables*/
259 /* Used by tables to signal that a result is not verifiable*/
260 NON_VERIFIABLE_RESULT = 0x80,
262 /*Mask used to extract just the type, excluding flags */
265 /* The stack type is a managed pointer, unmask the value to res */
266 POINTER_MASK = 0x100,
268 /*Stack type with the pointer mask*/
269 RAW_TYPE_MASK = 0x10F,
271 /* Controlled Mutability Manager Pointer */
274 /* The stack type is a null literal*/
275 NULL_LITERAL_MASK = 0x400,
277 /**Used by ldarg.0 and family to let delegate verification happens.*/
278 THIS_POINTER_MASK = 0x800,
280 /**Signals that this is a boxed value type*/
283 /*This is an unitialized this ref*/
284 UNINIT_THIS_MASK = 0x2000,
287 static const char* const
288 type_names [TYPE_MAX + 1] = {
299 PREFIX_UNALIGNED = 1,
302 PREFIX_CONSTRAINED = 8,
305 //////////////////////////////////////////////////////////////////
307 #ifdef ENABLE_VERIFIER_STATS
309 #define _MEM_ALLOC(amt) do { allocated_memory += (amt); working_set += (amt); } while (0)
310 #define _MEM_FREE(amt) do { working_set -= (amt); } while (0)
312 static int allocated_memory;
313 static int working_set;
314 static int max_allocated_memory;
315 static int max_working_set;
316 static int total_allocated_memory;
319 finish_collect_stats (void)
321 max_allocated_memory = MAX (max_allocated_memory, allocated_memory);
322 max_working_set = MAX (max_working_set, working_set);
323 total_allocated_memory += allocated_memory;
324 allocated_memory = working_set = 0;
328 init_verifier_stats (void)
330 static gboolean inited;
333 mono_counters_register ("Maximum memory allocated during verification", MONO_COUNTER_METADATA | MONO_COUNTER_INT, &max_allocated_memory);
334 mono_counters_register ("Maximum memory used during verification", MONO_COUNTER_METADATA | MONO_COUNTER_INT, &max_working_set);
335 mono_counters_register ("Total memory allocated for verification", MONO_COUNTER_METADATA | MONO_COUNTER_INT, &total_allocated_memory);
341 #define _MEM_ALLOC(amt) do {} while (0)
342 #define _MEM_FREE(amt) do { } while (0)
344 #define finish_collect_stats()
345 #define init_verifier_stats()
350 //////////////////////////////////////////////////////////////////
353 /*Token validation macros and functions */
354 #define IS_MEMBER_REF(token) (mono_metadata_token_table (token) == MONO_TABLE_MEMBERREF)
355 #define IS_METHOD_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
356 #define IS_METHOD_SPEC(token) (mono_metadata_token_table (token) == MONO_TABLE_METHODSPEC)
357 #define IS_FIELD_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_FIELD)
359 #define IS_TYPE_REF(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPEREF)
360 #define IS_TYPE_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPEDEF)
361 #define IS_TYPE_SPEC(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPESPEC)
362 #define IS_METHOD_DEF_OR_REF_OR_SPEC(token) (IS_METHOD_DEF (token) || IS_MEMBER_REF (token) || IS_METHOD_SPEC (token))
363 #define IS_TYPE_DEF_OR_REF_OR_SPEC(token) (IS_TYPE_DEF (token) || IS_TYPE_REF (token) || IS_TYPE_SPEC (token))
364 #define IS_FIELD_DEF_OR_REF(token) (IS_FIELD_DEF (token) || IS_MEMBER_REF (token))
367 * Verify if @token refers to a valid row on int's table.
370 token_bounds_check (MonoImage *image, guint32 token)
372 if (image_is_dynamic (image))
373 return mono_reflection_is_valid_dynamic_token ((MonoDynamicImage*)image, token);
374 return image->tables [mono_metadata_token_table (token)].rows >= mono_metadata_token_index (token) && mono_metadata_token_index (token) > 0;
378 mono_type_create_fnptr_from_mono_method (VerifyContext *ctx, MonoMethod *method)
380 MonoType *res = g_new0 (MonoType, 1);
381 _MEM_ALLOC (sizeof (MonoType));
383 //FIXME use mono_method_get_signature_full
384 res->data.method = mono_method_signature (method);
385 res->type = MONO_TYPE_FNPTR;
386 ctx->funptrs = g_slist_prepend (ctx->funptrs, res);
391 * mono_type_is_enum_type:
393 * Returns: TRUE if @type is an enum type.
396 mono_type_is_enum_type (MonoType *type)
398 if (type->type == MONO_TYPE_VALUETYPE && type->data.klass->enumtype)
400 if (type->type == MONO_TYPE_GENERICINST && type->data.generic_class->container_class->enumtype)
406 * mono_type_is_value_type:
408 * Returns: TRUE if @type is named after @namespace.@name.
412 mono_type_is_value_type (MonoType *type, const char *namespace_, const char *name)
414 return type->type == MONO_TYPE_VALUETYPE &&
415 !strcmp (namespace_, type->data.klass->name_space) &&
416 !strcmp (name, type->data.klass->name);
420 * Returns TURE if @type is VAR or MVAR
423 mono_type_is_generic_argument (MonoType *type)
425 return type->type == MONO_TYPE_VAR || type->type == MONO_TYPE_MVAR;
429 * mono_type_get_underlying_type_any:
431 * This functions is just like mono_type_get_underlying_type but it doesn't care if the type is byref.
433 * Returns the underlying type of @type regardless if it is byref or not.
436 mono_type_get_underlying_type_any (MonoType *type)
438 if (type->type == MONO_TYPE_VALUETYPE && type->data.klass->enumtype)
439 return mono_class_enum_basetype (type->data.klass);
440 if (type->type == MONO_TYPE_GENERICINST && type->data.generic_class->container_class->enumtype)
441 return mono_class_enum_basetype (type->data.generic_class->container_class);
445 static G_GNUC_UNUSED const char*
446 mono_type_get_stack_name (MonoType *type)
448 return type_names [get_stack_type (type) & TYPE_MASK];
451 #define CTOR_REQUIRED_FLAGS (METHOD_ATTRIBUTE_SPECIAL_NAME | METHOD_ATTRIBUTE_RT_SPECIAL_NAME)
452 #define CTOR_INVALID_FLAGS (METHOD_ATTRIBUTE_STATIC)
455 mono_method_is_constructor (MonoMethod *method)
457 return ((method->flags & CTOR_REQUIRED_FLAGS) == CTOR_REQUIRED_FLAGS &&
458 !(method->flags & CTOR_INVALID_FLAGS) &&
459 !strcmp (".ctor", method->name));
463 mono_class_has_default_constructor (MonoClass *klass)
468 mono_class_setup_methods (klass);
469 if (klass->exception_type)
472 for (i = 0; i < klass->method.count; ++i) {
473 method = klass->methods [i];
474 if (mono_method_is_constructor (method) &&
475 mono_method_signature (method) &&
476 mono_method_signature (method)->param_count == 0 &&
477 (method->flags & METHOD_ATTRIBUTE_MEMBER_ACCESS_MASK) == METHOD_ATTRIBUTE_PUBLIC)
484 * Verify if @type is valid for the given @ctx verification context.
485 * this function checks for VAR and MVAR types that are invalid under the current verifier,
488 mono_type_is_valid_type_in_context_full (MonoType *type, MonoGenericContext *context, gboolean check_gtd)
491 MonoGenericInst *inst;
493 switch (type->type) {
498 inst = type->type == MONO_TYPE_VAR ? context->class_inst : context->method_inst;
499 if (!inst || mono_type_get_generic_param_num (type) >= inst->type_argc)
502 case MONO_TYPE_SZARRAY:
503 return mono_type_is_valid_type_in_context_full (&type->data.klass->byval_arg, context, check_gtd);
504 case MONO_TYPE_ARRAY:
505 return mono_type_is_valid_type_in_context_full (&type->data.array->eklass->byval_arg, context, check_gtd);
507 return mono_type_is_valid_type_in_context_full (type->data.type, context, check_gtd);
508 case MONO_TYPE_GENERICINST:
509 inst = type->data.generic_class->context.class_inst;
512 for (i = 0; i < inst->type_argc; ++i)
513 if (!mono_type_is_valid_type_in_context_full (inst->type_argv [i], context, check_gtd))
516 case MONO_TYPE_CLASS:
517 case MONO_TYPE_VALUETYPE: {
518 MonoClass *klass = type->data.klass;
520 * It's possible to encode generic'sh types in such a way that they disguise themselves as class or valuetype.
521 * Fixing the type decoding is really tricky since under some cases this behavior is needed, for example, to
522 * have a 'class' type pointing to a 'genericinst' class.
524 * For the runtime these non canonical (weird) encodings work fine, the worst they can cause is some
525 * reflection oddities which are harmless - to security at least.
527 if (klass->byval_arg.type != type->type)
528 return mono_type_is_valid_type_in_context_full (&klass->byval_arg, context, check_gtd);
530 if (check_gtd && klass->generic_container)
541 mono_type_is_valid_type_in_context (MonoType *type, MonoGenericContext *context)
543 return mono_type_is_valid_type_in_context_full (type, context, FALSE);
546 /*This function returns NULL if the type is not instantiatable*/
548 verifier_inflate_type (VerifyContext *ctx, MonoType *type, MonoGenericContext *context)
553 result = mono_class_inflate_generic_type_checked (type, context, &error);
554 if (!mono_error_ok (&error)) {
555 mono_error_cleanup (&error);
561 /*A side note here. We don't need to check if arguments are broken since this
562 is only need to be done by the runtime before realizing the type.
565 is_valid_generic_instantiation (MonoGenericContainer *gc, MonoGenericContext *context, MonoGenericInst *ginst)
570 if (ginst->type_argc != gc->type_argc)
573 for (i = 0; i < gc->type_argc; ++i) {
574 MonoGenericParamInfo *param_info = mono_generic_container_get_param_info (gc, i);
575 MonoClass *paramClass;
576 MonoClass **constraints;
577 MonoType *param_type = ginst->type_argv [i];
579 /*it's not our job to validate type variables*/
580 if (mono_type_is_generic_argument (param_type))
583 paramClass = mono_class_from_mono_type (param_type);
586 /* A GTD can't be a generic argument.
588 * Due to how types are encoded we must check for the case of a genericinst MonoType and GTD MonoClass.
589 * This happens in cases such as: class Foo<T> { void X() { new Bar<T> (); } }
591 * Open instantiations can have GTDs as this happens when one type is instantiated with others params
592 * and the former has an expansion into the later. For example:
594 * class A<T>: B<K> {}
595 * The type A <K> has a parent B<K>, that is inflated into the GTD B<>.
596 * Since A<K> is open, thus not instantiatable, this is valid.
598 if (paramClass->generic_container && param_type->type != MONO_TYPE_GENERICINST && !ginst->is_open)
601 /*it's not safe to call mono_class_init from here*/
602 if (paramClass->generic_class && !paramClass->inited) {
603 if (!mono_class_is_valid_generic_instantiation (NULL, paramClass))
607 if (!param_info->constraints && !(param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK))
610 if ((param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT) && (!paramClass->valuetype || mono_class_is_nullable (paramClass)))
613 if ((param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_REFERENCE_TYPE_CONSTRAINT) && paramClass->valuetype)
616 if ((param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_CONSTRUCTOR_CONSTRAINT) && !paramClass->valuetype && !mono_class_has_default_constructor (paramClass))
619 if (!param_info->constraints)
622 for (constraints = param_info->constraints; *constraints; ++constraints) {
623 MonoClass *ctr = *constraints;
626 inflated = mono_class_inflate_generic_type_checked (&ctr->byval_arg, context, &error);
627 if (!mono_error_ok (&error)) {
628 mono_error_cleanup (&error);
631 ctr = mono_class_from_mono_type (inflated);
632 mono_metadata_free_type (inflated);
634 /*FIXME maybe we need the same this as verifier_class_is_assignable_from*/
635 if (!mono_class_is_assignable_from_slow (ctr, paramClass))
643 * mono_generic_param_is_constraint_compatible:
645 * Returns: TRUE if @candidate is constraint compatible with @target.
647 * This means that @candidate constraints are a super set of @target constaints
650 mono_generic_param_is_constraint_compatible (VerifyContext *ctx, MonoGenericParam *target, MonoGenericParam *candidate, MonoClass *candidate_param_class, MonoGenericContext *context)
652 MonoGenericParamInfo *tinfo = mono_generic_param_info (target);
653 MonoGenericParamInfo *cinfo = mono_generic_param_info (candidate);
654 MonoClass **candidate_class;
655 gboolean class_constraint_satisfied = FALSE;
656 gboolean valuetype_constraint_satisfied = FALSE;
658 int tmask = tinfo->flags & GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK;
659 int cmask = cinfo->flags & GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK;
661 if (cinfo->constraints) {
662 for (candidate_class = cinfo->constraints; *candidate_class; ++candidate_class) {
664 MonoType *inflated = verifier_inflate_type (ctx, &(*candidate_class)->byval_arg, ctx->generic_context);
667 cc = mono_class_from_mono_type (inflated);
668 mono_metadata_free_type (inflated);
670 if (mono_type_is_reference (&cc->byval_arg) && !MONO_CLASS_IS_INTERFACE (cc))
671 class_constraint_satisfied = TRUE;
672 else if (!mono_type_is_reference (&cc->byval_arg) && !MONO_CLASS_IS_INTERFACE (cc))
673 valuetype_constraint_satisfied = TRUE;
676 class_constraint_satisfied |= (cmask & GENERIC_PARAMETER_ATTRIBUTE_REFERENCE_TYPE_CONSTRAINT) != 0;
677 valuetype_constraint_satisfied |= (cmask & GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT) != 0;
679 if ((tmask & GENERIC_PARAMETER_ATTRIBUTE_REFERENCE_TYPE_CONSTRAINT) && !class_constraint_satisfied)
681 if ((tmask & GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT) && !valuetype_constraint_satisfied)
683 if ((tmask & GENERIC_PARAMETER_ATTRIBUTE_CONSTRUCTOR_CONSTRAINT) && !((cmask & GENERIC_PARAMETER_ATTRIBUTE_CONSTRUCTOR_CONSTRAINT) ||
684 valuetype_constraint_satisfied)) {
689 if (tinfo->constraints) {
690 MonoClass **target_class;
691 for (target_class = tinfo->constraints; *target_class; ++target_class) {
693 MonoType *inflated = verifier_inflate_type (ctx, &(*target_class)->byval_arg, context);
696 tc = mono_class_from_mono_type (inflated);
697 mono_metadata_free_type (inflated);
700 * A constraint from @target might inflate into @candidate itself and in that case we don't need
701 * check it's constraints since it satisfy the constraint by itself.
703 if (mono_metadata_type_equal (&tc->byval_arg, &candidate_param_class->byval_arg))
706 if (!cinfo->constraints)
709 for (candidate_class = cinfo->constraints; *candidate_class; ++candidate_class) {
711 inflated = verifier_inflate_type (ctx, &(*candidate_class)->byval_arg, ctx->generic_context);
714 cc = mono_class_from_mono_type (inflated);
715 mono_metadata_free_type (inflated);
717 if (verifier_class_is_assignable_from (tc, cc))
721 * This happens when we have the following:
723 * Bar<K> where K : IFace
724 * Foo<T, U> where T : U where U : IFace
726 * Bar<T> <- T here satisfy K constraint transitively through to U's constraint
729 if (mono_type_is_generic_argument (&cc->byval_arg)) {
730 MonoGenericParam *other_candidate = verifier_get_generic_param_from_type (ctx, &cc->byval_arg);
732 if (mono_generic_param_is_constraint_compatible (ctx, target, other_candidate, cc, context)) {
737 if (!*candidate_class)
744 static MonoGenericParam*
745 verifier_get_generic_param_from_type (VerifyContext *ctx, MonoType *type)
747 MonoGenericContainer *gc;
748 MonoMethod *method = ctx->method;
751 num = mono_type_get_generic_param_num (type);
753 if (type->type == MONO_TYPE_VAR) {
754 MonoClass *gtd = method->klass;
755 if (gtd->generic_class)
756 gtd = gtd->generic_class->container_class;
757 gc = gtd->generic_container;
759 MonoMethod *gmd = method;
760 if (method->is_inflated)
761 gmd = ((MonoMethodInflated*)method)->declaring;
762 gc = mono_method_get_generic_container (gmd);
766 return mono_generic_container_get_param (gc, num);
772 * Verify if @type is valid for the given @ctx verification context.
773 * this function checks for VAR and MVAR types that are invalid under the current verifier,
774 * This means that it either
777 is_valid_type_in_context (VerifyContext *ctx, MonoType *type)
779 return mono_type_is_valid_type_in_context (type, ctx->generic_context);
783 is_valid_generic_instantiation_in_context (VerifyContext *ctx, MonoGenericInst *ginst, gboolean check_gtd)
786 for (i = 0; i < ginst->type_argc; ++i) {
787 MonoType *type = ginst->type_argv [i];
789 if (!mono_type_is_valid_type_in_context_full (type, ctx->generic_context, TRUE))
796 generic_arguments_respect_constraints (VerifyContext *ctx, MonoGenericContainer *gc, MonoGenericContext *context, MonoGenericInst *ginst)
799 for (i = 0; i < ginst->type_argc; ++i) {
800 MonoType *type = ginst->type_argv [i];
801 MonoGenericParam *target = mono_generic_container_get_param (gc, i);
802 MonoGenericParam *candidate;
803 MonoClass *candidate_class;
805 if (!mono_type_is_generic_argument (type))
808 if (!is_valid_type_in_context (ctx, type))
811 candidate = verifier_get_generic_param_from_type (ctx, type);
812 candidate_class = mono_class_from_mono_type (type);
814 if (!mono_generic_param_is_constraint_compatible (ctx, target, candidate, candidate_class, context))
821 mono_method_repect_method_constraints (VerifyContext *ctx, MonoMethod *method)
823 MonoMethodInflated *gmethod = (MonoMethodInflated *)method;
824 MonoGenericInst *ginst = gmethod->context.method_inst;
825 MonoGenericContainer *gc = mono_method_get_generic_container (gmethod->declaring);
826 return !gc || generic_arguments_respect_constraints (ctx, gc, &gmethod->context, ginst);
830 mono_class_repect_method_constraints (VerifyContext *ctx, MonoClass *klass)
832 MonoGenericClass *gklass = klass->generic_class;
833 MonoGenericInst *ginst = gklass->context.class_inst;
834 MonoGenericContainer *gc = gklass->container_class->generic_container;
835 return !gc || generic_arguments_respect_constraints (ctx, gc, &gklass->context, ginst);
839 mono_method_is_valid_generic_instantiation (VerifyContext *ctx, MonoMethod *method)
841 MonoMethodInflated *gmethod = (MonoMethodInflated *)method;
842 MonoGenericInst *ginst = gmethod->context.method_inst;
843 MonoGenericContainer *gc = mono_method_get_generic_container (gmethod->declaring);
844 if (!gc) /*non-generic inflated method - it's part of a generic type */
846 if (ctx && !is_valid_generic_instantiation_in_context (ctx, ginst, TRUE))
848 return is_valid_generic_instantiation (gc, &gmethod->context, ginst);
853 mono_class_is_valid_generic_instantiation (VerifyContext *ctx, MonoClass *klass)
855 MonoGenericClass *gklass = klass->generic_class;
856 MonoGenericInst *ginst = gklass->context.class_inst;
857 MonoGenericContainer *gc = gklass->container_class->generic_container;
858 if (ctx && !is_valid_generic_instantiation_in_context (ctx, ginst, TRUE))
860 return is_valid_generic_instantiation (gc, &gklass->context, ginst);
864 mono_type_is_valid_in_context (VerifyContext *ctx, MonoType *type)
869 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid null type at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
873 if (!is_valid_type_in_context (ctx, type)) {
874 char *str = mono_type_full_name (type);
875 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid generic type (%s%s) (argument out of range or %s is not generic) at 0x%04x",
876 str [0] == '!' ? "" : type->type == MONO_TYPE_VAR ? "!" : "!!",
878 type->type == MONO_TYPE_VAR ? "class" : "method",
880 MONO_EXCEPTION_BAD_IMAGE);
885 klass = mono_class_from_mono_type (type);
886 mono_class_init (klass);
887 if (mono_loader_get_last_error () || klass->exception_type != MONO_EXCEPTION_NONE) {
888 if (klass->generic_class && !mono_class_is_valid_generic_instantiation (NULL, klass))
889 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);
891 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);
892 mono_loader_clear_error ();
896 if (klass->generic_class && klass->generic_class->container_class->exception_type != MONO_EXCEPTION_NONE) {
897 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);
901 if (!klass->generic_class)
904 if (!mono_class_is_valid_generic_instantiation (ctx, klass)) {
905 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);
909 if (!mono_class_repect_method_constraints (ctx, klass)) {
910 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);
917 static verify_result_t
918 mono_method_is_valid_in_context (VerifyContext *ctx, MonoMethod *method)
920 if (!mono_type_is_valid_in_context (ctx, &method->klass->byval_arg))
921 return RESULT_INVALID;
923 if (!method->is_inflated)
926 if (!mono_method_is_valid_generic_instantiation (ctx, method)) {
927 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);
928 return RESULT_INVALID;
931 if (!mono_method_repect_method_constraints (ctx, method)) {
932 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));
933 return RESULT_UNVERIFIABLE;
939 static MonoClassField*
940 verifier_load_field (VerifyContext *ctx, int token, MonoClass **out_klass, const char *opcode) {
942 MonoClassField *field;
943 MonoClass *klass = NULL;
945 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
946 field = (MonoClassField *)mono_method_get_wrapper_data (ctx->method, (guint32)token);
947 klass = field ? field->parent : NULL;
949 if (!IS_FIELD_DEF_OR_REF (token) || !token_bounds_check (ctx->image, token)) {
950 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);
954 field = mono_field_from_token_checked (ctx->image, token, &klass, ctx->generic_context, &error);
955 mono_error_cleanup (&error); /*FIXME don't swallow the error */
958 if (!field || !field->parent || !klass) {
959 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);
963 if (!mono_type_is_valid_in_context (ctx, &klass->byval_arg))
966 if (mono_field_get_flags (field) & FIELD_ATTRIBUTE_LITERAL) {
967 char *type_name = mono_type_get_full_name (field->parent);
968 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot reference literal field %s::%s at 0x%04x", type_name, field->name, ctx->ip_offset));
978 verifier_load_method (VerifyContext *ctx, int token, const char *opcode) {
982 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
983 method = (MonoMethod *)mono_method_get_wrapper_data (ctx->method, (guint32)token);
986 if (!IS_METHOD_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
987 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);
991 method = mono_get_method_checked (ctx->image, token, NULL, ctx->generic_context, &error);
992 mono_error_cleanup (&error); /* FIXME don't swallow this error */
996 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);
1000 if (mono_method_is_valid_in_context (ctx, method) == RESULT_INVALID)
1007 verifier_load_type (VerifyContext *ctx, int token, const char *opcode) {
1010 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
1011 MonoClass *klass = (MonoClass *)mono_method_get_wrapper_data (ctx->method, (guint32)token);
1012 type = klass ? &klass->byval_arg : NULL;
1015 if (!IS_TYPE_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
1016 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid type token 0x%08x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
1019 type = mono_type_get_checked (ctx->image, token, ctx->generic_context, &error);
1020 mono_error_cleanup (&error); /*FIXME don't swallow the error */
1023 if (!type || mono_loader_get_last_error ()) {
1024 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);
1025 mono_loader_clear_error ();
1029 if (!mono_type_is_valid_in_context (ctx, type))
1036 /* stack_slot_get_type:
1038 * Returns the stack type of @value. This value includes POINTER_MASK.
1040 * Use this function to checks that account for a managed pointer.
1043 stack_slot_get_type (ILStackDesc *value)
1045 return value->stype & RAW_TYPE_MASK;
1048 /* stack_slot_get_underlying_type:
1050 * Returns the stack type of @value. This value does not include POINTER_MASK.
1052 * Use this function is cases where the fact that the value could be a managed pointer is
1053 * irrelevant. For example, field load doesn't care about this fact of type on stack.
1056 stack_slot_get_underlying_type (ILStackDesc *value)
1058 return value->stype & TYPE_MASK;
1061 /* stack_slot_is_managed_pointer:
1063 * Returns TRUE is @value is a managed pointer.
1066 stack_slot_is_managed_pointer (ILStackDesc *value)
1068 return (value->stype & POINTER_MASK) == POINTER_MASK;
1071 /* stack_slot_is_managed_mutability_pointer:
1073 * Returns TRUE is @value is a managed mutability pointer.
1075 static G_GNUC_UNUSED gboolean
1076 stack_slot_is_managed_mutability_pointer (ILStackDesc *value)
1078 return (value->stype & CMMP_MASK) == CMMP_MASK;
1081 /* stack_slot_is_null_literal:
1083 * Returns TRUE is @value is the null literal.
1086 stack_slot_is_null_literal (ILStackDesc *value)
1088 return (value->stype & NULL_LITERAL_MASK) == NULL_LITERAL_MASK;
1092 /* stack_slot_is_this_pointer:
1094 * Returns TRUE is @value is the this literal
1097 stack_slot_is_this_pointer (ILStackDesc *value)
1099 return (value->stype & THIS_POINTER_MASK) == THIS_POINTER_MASK;
1102 /* stack_slot_is_boxed_value:
1104 * Returns TRUE is @value is a boxed value
1107 stack_slot_is_boxed_value (ILStackDesc *value)
1109 return (value->stype & BOXED_MASK) == BOXED_MASK;
1113 stack_slot_get_name (ILStackDesc *value)
1115 return type_names [value->stype & TYPE_MASK];
1118 #define APPEND_WITH_PREDICATE(PRED,NAME) do {\
1119 if (PRED (value)) { \
1121 g_string_append (str, ", "); \
1122 g_string_append (str, NAME); \
1127 stack_slot_stack_type_full_name (ILStackDesc *value)
1129 GString *str = g_string_new ("");
1131 gboolean has_pred = FALSE, first = TRUE;
1133 if ((value->stype & TYPE_MASK) != value->stype) {
1134 g_string_append(str, "[");
1135 APPEND_WITH_PREDICATE (stack_slot_is_this_pointer, "this");
1136 APPEND_WITH_PREDICATE (stack_slot_is_boxed_value, "boxed");
1137 APPEND_WITH_PREDICATE (stack_slot_is_null_literal, "null");
1138 APPEND_WITH_PREDICATE (stack_slot_is_managed_mutability_pointer, "cmmp");
1139 APPEND_WITH_PREDICATE (stack_slot_is_managed_pointer, "mp");
1143 if (mono_type_is_generic_argument (value->type) && !stack_slot_is_boxed_value (value)) {
1145 g_string_append(str, "[");
1147 g_string_append (str, ", ");
1148 g_string_append (str, "unboxed");
1153 g_string_append(str, "] ");
1155 g_string_append (str, stack_slot_get_name (value));
1157 g_string_free (str, FALSE);
1162 stack_slot_full_name (ILStackDesc *value)
1164 char *type_name = mono_type_full_name (value->type);
1165 char *stack_name = stack_slot_stack_type_full_name (value);
1166 char *res = g_strdup_printf ("%s (%s)", type_name, stack_name);
1168 g_free (stack_name);
1172 //////////////////////////////////////////////////////////////////
1174 mono_free_verify_list (GSList *list)
1176 MonoVerifyInfoExtended *info;
1179 for (tmp = list; tmp; tmp = tmp->next) {
1180 info = (MonoVerifyInfoExtended *)tmp->data;
1181 g_free (info->info.message);
1184 g_slist_free (list);
1187 #define ADD_ERROR(list,msg) \
1189 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1190 vinfo->info.status = MONO_VERIFY_ERROR; \
1191 vinfo->info.message = (msg); \
1192 (list) = g_slist_prepend ((list), vinfo); \
1195 #define ADD_WARN(list,code,msg) \
1197 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1198 vinfo->info.status = (code); \
1199 vinfo->info.message = (msg); \
1200 (list) = g_slist_prepend ((list), vinfo); \
1203 #define ADD_INVALID(list,msg) \
1205 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1206 vinfo->status = MONO_VERIFY_ERROR; \
1207 vinfo->message = (msg); \
1208 (list) = g_slist_prepend ((list), vinfo); \
1209 /*G_BREAKPOINT ();*/ \
1213 #define CHECK_STACK_UNDERFLOW(num) \
1215 if (cur_stack < (num)) \
1216 ADD_INVALID (list, g_strdup_printf ("Stack underflow at 0x%04x (%d items instead of %d)", ip_offset, cur_stack, (num))); \
1219 #define CHECK_STACK_OVERFLOW() \
1221 if (cur_stack >= max_stack) \
1222 ADD_INVALID (list, g_strdup_printf ("Maxstack exceeded at 0x%04x", ip_offset)); \
1227 in_any_block (MonoMethodHeader *header, guint offset)
1230 MonoExceptionClause *clause;
1232 for (i = 0; i < header->num_clauses; ++i) {
1233 clause = &header->clauses [i];
1234 if (MONO_OFFSET_IN_CLAUSE (clause, offset))
1236 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1238 if (MONO_OFFSET_IN_FILTER (clause, offset))
1245 * in_any_exception_block:
1247 * Returns TRUE is @offset is part of any exception clause (filter, handler, catch, finally or fault).
1250 in_any_exception_block (MonoMethodHeader *header, guint offset)
1253 MonoExceptionClause *clause;
1255 for (i = 0; i < header->num_clauses; ++i) {
1256 clause = &header->clauses [i];
1257 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1259 if (MONO_OFFSET_IN_FILTER (clause, offset))
1266 * is_valid_branch_instruction:
1268 * Verify if it's valid to perform a branch from @offset to @target.
1269 * This should be used with br and brtrue/false.
1270 * It returns 0 if valid, 1 for unverifiable and 2 for invalid.
1271 * The major difference from other similiar functions is that branching into a
1272 * finally/fault block is invalid instead of just unverifiable.
1275 is_valid_branch_instruction (MonoMethodHeader *header, guint offset, guint target)
1278 MonoExceptionClause *clause;
1280 for (i = 0; i < header->num_clauses; ++i) {
1281 clause = &header->clauses [i];
1282 /*branching into a finally block is invalid*/
1283 if ((clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY || clause->flags == MONO_EXCEPTION_CLAUSE_FAULT) &&
1284 !MONO_OFFSET_IN_HANDLER (clause, offset) &&
1285 MONO_OFFSET_IN_HANDLER (clause, target))
1288 if (clause->try_offset != target && (MONO_OFFSET_IN_CLAUSE (clause, offset) ^ MONO_OFFSET_IN_CLAUSE (clause, target)))
1290 if (MONO_OFFSET_IN_HANDLER (clause, offset) ^ MONO_OFFSET_IN_HANDLER (clause, target))
1292 if (MONO_OFFSET_IN_FILTER (clause, offset) ^ MONO_OFFSET_IN_FILTER (clause, target))
1299 * is_valid_cmp_branch_instruction:
1301 * Verify if it's valid to perform a branch from @offset to @target.
1302 * This should be used with binary comparison branching instruction, like beq, bge and similars.
1303 * It returns 0 if valid, 1 for unverifiable and 2 for invalid.
1305 * The major differences from other similar functions are that most errors lead to invalid
1306 * code and only branching out of finally, filter or fault clauses is unverifiable.
1309 is_valid_cmp_branch_instruction (MonoMethodHeader *header, guint offset, guint target)
1312 MonoExceptionClause *clause;
1314 for (i = 0; i < header->num_clauses; ++i) {
1315 clause = &header->clauses [i];
1316 /*branching out of a handler or finally*/
1317 if (clause->flags != MONO_EXCEPTION_CLAUSE_NONE &&
1318 MONO_OFFSET_IN_HANDLER (clause, offset) &&
1319 !MONO_OFFSET_IN_HANDLER (clause, target))
1322 if (clause->try_offset != target && (MONO_OFFSET_IN_CLAUSE (clause, offset) ^ MONO_OFFSET_IN_CLAUSE (clause, target)))
1324 if (MONO_OFFSET_IN_HANDLER (clause, offset) ^ MONO_OFFSET_IN_HANDLER (clause, target))
1326 if (MONO_OFFSET_IN_FILTER (clause, offset) ^ MONO_OFFSET_IN_FILTER (clause, target))
1333 * A leave can't escape a finally block
1336 is_correct_leave (MonoMethodHeader *header, guint offset, guint target)
1339 MonoExceptionClause *clause;
1341 for (i = 0; i < header->num_clauses; ++i) {
1342 clause = &header->clauses [i];
1343 if (clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY && MONO_OFFSET_IN_HANDLER (clause, offset) && !MONO_OFFSET_IN_HANDLER (clause, target))
1345 if (MONO_OFFSET_IN_FILTER (clause, offset))
1352 * A rethrow can't happen outside of a catch handler.
1355 is_correct_rethrow (MonoMethodHeader *header, guint offset)
1358 MonoExceptionClause *clause;
1360 for (i = 0; i < header->num_clauses; ++i) {
1361 clause = &header->clauses [i];
1362 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1369 * An endfinally can't happen outside of a finally/fault handler.
1372 is_correct_endfinally (MonoMethodHeader *header, guint offset)
1375 MonoExceptionClause *clause;
1377 for (i = 0; i < header->num_clauses; ++i) {
1378 clause = &header->clauses [i];
1379 if (MONO_OFFSET_IN_HANDLER (clause, offset) && (clause->flags == MONO_EXCEPTION_CLAUSE_FAULT || clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY))
1387 * An endfilter can only happens inside a filter clause.
1388 * In non-strict mode filter is allowed inside the handler clause too
1390 static MonoExceptionClause *
1391 is_correct_endfilter (VerifyContext *ctx, guint offset)
1394 MonoExceptionClause *clause;
1396 for (i = 0; i < ctx->header->num_clauses; ++i) {
1397 clause = &ctx->header->clauses [i];
1398 if (clause->flags != MONO_EXCEPTION_CLAUSE_FILTER)
1400 if (MONO_OFFSET_IN_FILTER (clause, offset))
1402 if (!IS_STRICT_MODE (ctx) && MONO_OFFSET_IN_HANDLER (clause, offset))
1410 * Non-strict endfilter can happens inside a try block or any handler block
1413 is_unverifiable_endfilter (VerifyContext *ctx, guint offset)
1416 MonoExceptionClause *clause;
1418 for (i = 0; i < ctx->header->num_clauses; ++i) {
1419 clause = &ctx->header->clauses [i];
1420 if (MONO_OFFSET_IN_CLAUSE (clause, offset))
1427 is_valid_bool_arg (ILStackDesc *arg)
1429 if (stack_slot_is_managed_pointer (arg) || stack_slot_is_boxed_value (arg) || stack_slot_is_null_literal (arg))
1433 switch (stack_slot_get_underlying_type (arg)) {
1436 case TYPE_NATIVE_INT:
1440 g_assert (arg->type);
1441 switch (arg->type->type) {
1442 case MONO_TYPE_CLASS:
1443 case MONO_TYPE_STRING:
1444 case MONO_TYPE_OBJECT:
1445 case MONO_TYPE_SZARRAY:
1446 case MONO_TYPE_ARRAY:
1447 case MONO_TYPE_FNPTR:
1450 case MONO_TYPE_GENERICINST:
1451 /*We need to check if the container class
1452 * of the generic type is a valuetype, iow:
1453 * is it a "class Foo<T>" or a "struct Foo<T>"?
1455 return !arg->type->data.generic_class->container_class->valuetype;
1465 /*Type manipulation helper*/
1467 /*Returns the byref version of the supplied MonoType*/
1469 mono_type_get_type_byref (MonoType *type)
1473 return &mono_class_from_mono_type (type)->this_arg;
1477 /*Returns the byval version of the supplied MonoType*/
1479 mono_type_get_type_byval (MonoType *type)
1483 return &mono_class_from_mono_type (type)->byval_arg;
1487 mono_type_from_stack_slot (ILStackDesc *slot)
1489 if (stack_slot_is_managed_pointer (slot))
1490 return mono_type_get_type_byref (slot->type);
1494 /*Stack manipulation code*/
1497 ensure_stack_size (ILCodeDesc *stack, int required)
1502 if (required < stack->max_size)
1505 /* We don't have to worry about the exponential growth since stack_copy prune unused space */
1506 new_size = MAX (8, MAX (required, stack->max_size * 2));
1508 g_assert (new_size >= stack->size);
1509 g_assert (new_size >= required);
1511 tmp = g_new0 (ILStackDesc, new_size);
1512 _MEM_ALLOC (sizeof (ILStackDesc) * new_size);
1516 memcpy (tmp, stack->stack, stack->size * sizeof (ILStackDesc));
1517 g_free (stack->stack);
1518 _MEM_FREE (sizeof (ILStackDesc) * stack->max_size);
1522 stack->max_size = new_size;
1526 stack_init (VerifyContext *ctx, ILCodeDesc *state)
1528 if (state->flags & IL_CODE_FLAG_STACK_INITED)
1530 state->size = state->max_size = 0;
1531 state->flags |= IL_CODE_FLAG_STACK_INITED;
1535 stack_copy (ILCodeDesc *to, ILCodeDesc *from)
1537 ensure_stack_size (to, from->size);
1538 to->size = from->size;
1540 /*stack copy happens at merge points, which have small stacks*/
1542 memcpy (to->stack, from->stack, sizeof (ILStackDesc) * from->size);
1546 copy_stack_value (ILStackDesc *to, ILStackDesc *from)
1548 to->stype = from->stype;
1549 to->type = from->type;
1550 to->method = from->method;
1554 check_underflow (VerifyContext *ctx, int size)
1556 if (ctx->eval.size < size) {
1557 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack underflow, required %d, but have %d at 0x%04x", size, ctx->eval.size, ctx->ip_offset));
1564 check_overflow (VerifyContext *ctx)
1566 if (ctx->eval.size >= ctx->max_stack) {
1567 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have stack-depth %d at 0x%04x", ctx->eval.size + 1, ctx->ip_offset));
1573 /*This reject out PTR, FNPTR and TYPEDBYREF*/
1575 check_unmanaged_pointer (VerifyContext *ctx, ILStackDesc *value)
1577 if (stack_slot_get_type (value) == TYPE_PTR) {
1578 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unmanaged pointer is not a verifiable type at 0x%04x", ctx->ip_offset));
1584 /*TODO verify if MONO_TYPE_TYPEDBYREF is not allowed here as well.*/
1586 check_unverifiable_type (VerifyContext *ctx, MonoType *type)
1588 if (type->type == MONO_TYPE_PTR || type->type == MONO_TYPE_FNPTR) {
1589 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unmanaged pointer is not a verifiable type at 0x%04x", ctx->ip_offset));
1595 static ILStackDesc *
1596 stack_push (VerifyContext *ctx)
1598 g_assert (ctx->eval.size < ctx->max_stack);
1599 g_assert (ctx->eval.size <= ctx->eval.max_size);
1601 ensure_stack_size (&ctx->eval, ctx->eval.size + 1);
1603 return & ctx->eval.stack [ctx->eval.size++];
1606 static ILStackDesc *
1607 stack_push_val (VerifyContext *ctx, int stype, MonoType *type)
1609 ILStackDesc *top = stack_push (ctx);
1615 static ILStackDesc *
1616 stack_pop (VerifyContext *ctx)
1619 g_assert (ctx->eval.size > 0);
1620 ret = ctx->eval.stack + --ctx->eval.size;
1621 if ((ret->stype & UNINIT_THIS_MASK) == UNINIT_THIS_MASK)
1622 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Found use of uninitialized 'this ptr' ref at 0x%04x", ctx->ip_offset));
1626 /* This function allows to safely pop an unititialized this ptr from
1627 * the eval stack without marking the method as unverifiable.
1629 static ILStackDesc *
1630 stack_pop_safe (VerifyContext *ctx)
1632 g_assert (ctx->eval.size > 0);
1633 return ctx->eval.stack + --ctx->eval.size;
1636 /*Positive number distance from stack top. [0] is stack top, [1] is the one below*/
1638 stack_peek (VerifyContext *ctx, int distance)
1640 g_assert (ctx->eval.size - distance > 0);
1641 return ctx->eval.stack + (ctx->eval.size - 1 - distance);
1644 static ILStackDesc *
1645 stack_push_stack_val (VerifyContext *ctx, ILStackDesc *value)
1647 ILStackDesc *top = stack_push (ctx);
1648 copy_stack_value (top, value);
1652 /* Returns the MonoType associated with the token, or NULL if it is invalid.
1654 * A boxable type can be either a reference or value type, but cannot be a byref type or an unmanaged pointer
1657 get_boxable_mono_type (VerifyContext* ctx, int token, const char *opcode)
1662 if (!(type = verifier_load_type (ctx, token, opcode)))
1665 if (type->byref && type->type != MONO_TYPE_TYPEDBYREF) {
1666 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of byref type for %s at 0x%04x", opcode, ctx->ip_offset));
1670 if (type->type == MONO_TYPE_VOID) {
1671 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of void type for %s at 0x%04x", opcode, ctx->ip_offset));
1675 if (type->type == MONO_TYPE_TYPEDBYREF)
1676 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid use of typedbyref for %s at 0x%04x", opcode, ctx->ip_offset));
1678 if (!(klass = mono_class_from_mono_type (type)))
1679 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Could not retrieve type token for %s at 0x%04x", opcode, ctx->ip_offset));
1681 if (klass->generic_container && type->type != MONO_TYPE_GENERICINST)
1682 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));
1684 check_unverifiable_type (ctx, type);
1689 /*operation result tables */
1691 static const unsigned char bin_op_table [TYPE_MAX][TYPE_MAX] = {
1692 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1693 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1694 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1695 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
1696 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1697 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1700 static const unsigned char add_table [TYPE_MAX][TYPE_MAX] = {
1701 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1702 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1703 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1704 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
1705 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_INV, TYPE_INV},
1706 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1709 static const unsigned char sub_table [TYPE_MAX][TYPE_MAX] = {
1710 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1711 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1712 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1713 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
1714 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_NATIVE_INT | NON_VERIFIABLE_RESULT, TYPE_INV},
1715 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1718 static const unsigned char int_bin_op_table [TYPE_MAX][TYPE_MAX] = {
1719 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1720 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1721 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1722 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1723 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1724 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1727 static const unsigned char shift_op_table [TYPE_MAX][TYPE_MAX] = {
1728 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1729 {TYPE_I8, TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV},
1730 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1731 {TYPE_INV, TYPE_INV, TYPE_INV, 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},
1736 static const unsigned char cmp_br_op [TYPE_MAX][TYPE_MAX] = {
1737 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1738 {TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1739 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1740 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV},
1741 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV},
1742 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1745 static const unsigned char cmp_br_eq_op [TYPE_MAX][TYPE_MAX] = {
1746 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1747 {TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1748 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_I4 | NON_VERIFIABLE_RESULT, TYPE_INV},
1749 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV},
1750 {TYPE_INV, TYPE_INV, TYPE_I4 | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_I4, TYPE_INV},
1751 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4},
1754 static const unsigned char add_ovf_un_table [TYPE_MAX][TYPE_MAX] = {
1755 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1756 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1757 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1758 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1759 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_INV, TYPE_INV},
1760 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1763 static const unsigned char sub_ovf_un_table [TYPE_MAX][TYPE_MAX] = {
1764 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1765 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1766 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1767 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1768 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_NATIVE_INT | NON_VERIFIABLE_RESULT, TYPE_INV},
1769 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1772 static const unsigned char bin_ovf_table [TYPE_MAX][TYPE_MAX] = {
1773 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1774 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1775 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1776 {TYPE_INV, TYPE_INV, TYPE_INV, 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},
1781 #ifdef MONO_VERIFIER_DEBUG
1785 dump_stack_value (ILStackDesc *value)
1787 printf ("[(%x)(%x)", value->type->type, value->stype);
1789 if (stack_slot_is_this_pointer (value))
1792 if (stack_slot_is_boxed_value (value))
1793 printf ("[boxed] ");
1795 if (stack_slot_is_null_literal (value))
1798 if (stack_slot_is_managed_mutability_pointer (value))
1799 printf ("Controled Mutability MP: ");
1801 if (stack_slot_is_managed_pointer (value))
1802 printf ("Managed Pointer to: ");
1804 switch (stack_slot_get_underlying_type (value)) {
1806 printf ("invalid type]");
1814 case TYPE_NATIVE_INT:
1815 printf ("native int]");
1818 printf ("float64]");
1821 printf ("unmanaged pointer]");
1824 switch (value->type->type) {
1825 case MONO_TYPE_CLASS:
1826 case MONO_TYPE_VALUETYPE:
1827 printf ("complex] (%s)", value->type->data.klass->name);
1829 case MONO_TYPE_STRING:
1830 printf ("complex] (string)");
1832 case MONO_TYPE_OBJECT:
1833 printf ("complex] (object)");
1835 case MONO_TYPE_SZARRAY:
1836 printf ("complex] (%s [])", value->type->data.klass->name);
1838 case MONO_TYPE_ARRAY:
1839 printf ("complex] (%s [%d %d %d])",
1840 value->type->data.array->eklass->name,
1841 value->type->data.array->rank,
1842 value->type->data.array->numsizes,
1843 value->type->data.array->numlobounds);
1845 case MONO_TYPE_GENERICINST:
1846 printf ("complex] (inst of %s )", value->type->data.generic_class->container_class->name);
1849 printf ("complex] (type generic param !%d - %s) ", value->type->data.generic_param->num, mono_generic_param_info (value->type->data.generic_param)->name);
1851 case MONO_TYPE_MVAR:
1852 printf ("complex] (method generic param !!%d - %s) ", value->type->data.generic_param->num, mono_generic_param_info (value->type->data.generic_param)->name);
1855 //should be a boxed value
1856 char * name = mono_type_full_name (value->type);
1857 printf ("complex] %s", name);
1863 printf ("unknown stack %x type]\n", value->stype);
1864 g_assert_not_reached ();
1869 dump_stack_state (ILCodeDesc *state)
1873 printf ("(%d) ", state->size);
1874 for (i = 0; i < state->size; ++i)
1875 dump_stack_value (state->stack + i);
1881 * is_array_type_compatible:
1883 * Returns TRUE if candidate array type can be assigned to target.
1885 * Both parameters MUST be of type MONO_TYPE_ARRAY (target->type == MONO_TYPE_ARRAY)
1888 is_array_type_compatible (MonoType *target, MonoType *candidate)
1890 MonoArrayType *left = target->data.array;
1891 MonoArrayType *right = candidate->data.array;
1893 g_assert (target->type == MONO_TYPE_ARRAY);
1894 g_assert (candidate->type == MONO_TYPE_ARRAY);
1896 if (left->rank != right->rank)
1899 return verifier_class_is_assignable_from (left->eklass, right->eklass);
1903 get_stack_type (MonoType *type)
1906 int type_kind = type->type;
1908 mask = POINTER_MASK;
1909 /*TODO handle CMMP_MASK */
1912 switch (type_kind) {
1915 case MONO_TYPE_BOOLEAN:
1918 case MONO_TYPE_CHAR:
1921 return TYPE_I4 | mask;
1925 return TYPE_NATIVE_INT | mask;
1927 /* FIXME: the spec says that you cannot have a pointer to method pointer, do we need to check this here? */
1928 case MONO_TYPE_FNPTR:
1930 case MONO_TYPE_TYPEDBYREF:
1931 return TYPE_PTR | mask;
1934 case MONO_TYPE_MVAR:
1936 case MONO_TYPE_CLASS:
1937 case MONO_TYPE_STRING:
1938 case MONO_TYPE_OBJECT:
1939 case MONO_TYPE_SZARRAY:
1940 case MONO_TYPE_ARRAY:
1941 return TYPE_COMPLEX | mask;
1945 return TYPE_I8 | mask;
1949 return TYPE_R8 | mask;
1951 case MONO_TYPE_GENERICINST:
1952 case MONO_TYPE_VALUETYPE:
1953 if (mono_type_is_enum_type (type)) {
1954 type = mono_type_get_underlying_type_any (type);
1957 type_kind = type->type;
1960 return TYPE_COMPLEX | mask;
1968 /* convert MonoType to ILStackDesc format (stype) */
1970 set_stack_value (VerifyContext *ctx, ILStackDesc *stack, MonoType *type, int take_addr)
1973 int type_kind = type->type;
1975 if (type->byref || take_addr)
1976 mask = POINTER_MASK;
1977 /* TODO handle CMMP_MASK */
1982 switch (type_kind) {
1985 case MONO_TYPE_BOOLEAN:
1988 case MONO_TYPE_CHAR:
1991 stack->stype = TYPE_I4 | mask;
1995 stack->stype = TYPE_NATIVE_INT | mask;
1998 /*FIXME: Do we need to check if it's a pointer to the method pointer? The spec says it' illegal to have that.*/
1999 case MONO_TYPE_FNPTR:
2001 case MONO_TYPE_TYPEDBYREF:
2002 stack->stype = TYPE_PTR | mask;
2005 case MONO_TYPE_CLASS:
2006 case MONO_TYPE_STRING:
2007 case MONO_TYPE_OBJECT:
2008 case MONO_TYPE_SZARRAY:
2009 case MONO_TYPE_ARRAY:
2012 case MONO_TYPE_MVAR:
2013 stack->stype = TYPE_COMPLEX | mask;
2018 stack->stype = TYPE_I8 | mask;
2022 stack->stype = TYPE_R8 | mask;
2024 case MONO_TYPE_GENERICINST:
2025 case MONO_TYPE_VALUETYPE:
2026 if (mono_type_is_enum_type (type)) {
2027 MonoType *utype = mono_type_get_underlying_type_any (type);
2029 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Could not resolve underlying type of %x at %d", type->type, ctx->ip_offset));
2033 type_kind = type->type;
2036 stack->stype = TYPE_COMPLEX | mask;
2040 VERIFIER_DEBUG ( printf ("unknown type 0x%02x in eval stack type\n", type->type); );
2041 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Illegal value set on stack 0x%02x at %d", type->type, ctx->ip_offset));
2048 * init_stack_with_value_at_exception_boundary:
2050 * Initialize the stack and push a given type.
2051 * The instruction is marked as been on the exception boundary.
2054 init_stack_with_value_at_exception_boundary (VerifyContext *ctx, ILCodeDesc *code, MonoClass *klass)
2057 MonoType *type = mono_class_inflate_generic_type_checked (&klass->byval_arg, ctx->generic_context, &error);
2059 if (!mono_error_ok (&error)) {
2060 char *name = mono_type_get_full_name (klass);
2061 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid class %s used for exception", name));
2063 mono_error_cleanup (&error);
2067 if (!ctx->max_stack) {
2068 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack overflow at 0x%04x", ctx->ip_offset));
2072 stack_init (ctx, code);
2073 ensure_stack_size (code, 1);
2074 set_stack_value (ctx, code->stack, type, FALSE);
2075 ctx->exception_types = g_slist_prepend (ctx->exception_types, type);
2077 code->flags |= IL_CODE_FLAG_WAS_TARGET;
2078 if (mono_type_is_generic_argument (type))
2079 code->stack->stype |= BOXED_MASK;
2083 get_ienumerable_class (void)
2085 static MonoClass* generic_ienumerable_class = NULL;
2087 if (generic_ienumerable_class == NULL)
2088 generic_ienumerable_class = mono_class_from_name (mono_defaults.corlib,
2089 "System.Collections.Generic", "IEnumerable`1");
2090 return generic_ienumerable_class;
2094 get_icollection_class (void)
2096 static MonoClass* generic_icollection_class = NULL;
2098 if (generic_icollection_class == NULL)
2099 generic_icollection_class = mono_class_from_name (mono_defaults.corlib,
2100 "System.Collections.Generic", "ICollection`1");
2101 return generic_icollection_class;
2105 get_ireadonlylist_class (void)
2107 static MonoClass* generic_ireadonlylist_class = NULL;
2109 if (generic_ireadonlylist_class == NULL)
2110 generic_ireadonlylist_class = mono_class_from_name (mono_defaults.corlib,
2111 "System.Collections.Generic", "IReadOnlyList`1");
2112 return generic_ireadonlylist_class;
2116 get_ireadonlycollection_class (void)
2118 static MonoClass* generic_ireadonlycollection_class = NULL;
2120 if (generic_ireadonlycollection_class == NULL)
2121 generic_ireadonlycollection_class = mono_class_from_name (mono_defaults.corlib,
2122 "System.Collections.Generic", "IReadOnlyCollection`1");
2123 return generic_ireadonlycollection_class;
2127 inflate_class_one_arg (MonoClass *gtype, MonoClass *arg0)
2130 args [0] = &arg0->byval_arg;
2132 return mono_class_bind_generic_parameters (gtype, 1, args, FALSE);
2136 verifier_inflate_and_check_compat (MonoClass *target, MonoClass *gtd, MonoClass *arg)
2139 if (!(tmp = inflate_class_one_arg (gtd, arg)))
2141 if (mono_class_is_variant_compatible (target, tmp, TRUE))
2147 verifier_class_is_assignable_from (MonoClass *target, MonoClass *candidate)
2149 MonoClass *iface_gtd;
2151 if (target == candidate)
2154 if (mono_class_has_variant_generic_params (target)) {
2155 if (MONO_CLASS_IS_INTERFACE (target)) {
2156 if (MONO_CLASS_IS_INTERFACE (candidate) && mono_class_is_variant_compatible (target, candidate, TRUE))
2159 if (candidate->rank == 1) {
2160 if (verifier_inflate_and_check_compat (target, mono_defaults.generic_ilist_class, candidate->element_class))
2162 if (verifier_inflate_and_check_compat (target, get_icollection_class (), candidate->element_class))
2164 if (verifier_inflate_and_check_compat (target, get_ienumerable_class (), candidate->element_class))
2166 if (verifier_inflate_and_check_compat (target, get_ireadonlylist_class (), candidate->element_class))
2168 if (verifier_inflate_and_check_compat (target, get_ireadonlycollection_class (), candidate->element_class))
2173 while (candidate && candidate != mono_defaults.object_class) {
2174 mono_class_setup_interfaces (candidate, &error);
2175 if (!mono_error_ok (&error)) {
2176 mono_error_cleanup (&error);
2180 /*klass is a generic variant interface, We need to extract from oklass a list of ifaces which are viable candidates.*/
2181 for (i = 0; i < candidate->interface_offsets_count; ++i) {
2182 MonoClass *iface = candidate->interfaces_packed [i];
2183 if (mono_class_is_variant_compatible (target, iface, TRUE))
2187 for (i = 0; i < candidate->interface_count; ++i) {
2188 MonoClass *iface = candidate->interfaces [i];
2189 if (mono_class_is_variant_compatible (target, iface, TRUE))
2192 candidate = candidate->parent;
2195 } else if (target->delegate) {
2196 if (mono_class_is_variant_compatible (target, candidate, TRUE))
2202 if (mono_class_is_assignable_from (target, candidate))
2205 if (!MONO_CLASS_IS_INTERFACE (target) || !target->generic_class || candidate->rank != 1)
2208 iface_gtd = target->generic_class->container_class;
2209 if (iface_gtd != mono_defaults.generic_ilist_class && iface_gtd != get_icollection_class () && iface_gtd != get_ienumerable_class ())
2212 target = mono_class_from_mono_type (target->generic_class->context.class_inst->type_argv [0]);
2213 candidate = candidate->element_class;
2218 /*Verify if type 'candidate' can be stored in type 'target'.
2220 * If strict, check for the underlying type and not the verification stack types
2223 verify_type_compatibility_full (VerifyContext *ctx, MonoType *target, MonoType *candidate, gboolean strict)
2225 #define IS_ONE_OF3(T, A, B, C) (T == A || T == B || T == C)
2226 #define IS_ONE_OF2(T, A, B) (T == A || T == B)
2228 MonoType *original_candidate = candidate;
2229 VERIFIER_DEBUG ( printf ("checking type compatibility %s x %s strict %d\n", mono_type_full_name (target), mono_type_full_name (candidate), strict); );
2231 /*only one is byref */
2232 if (candidate->byref ^ target->byref) {
2233 /* converting from native int to byref*/
2234 if (get_stack_type (candidate) == TYPE_NATIVE_INT && target->byref) {
2235 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("using byref native int at 0x%04x", ctx->ip_offset));
2240 strict |= target->byref;
2241 /*From now on we don't care about byref anymore, so it's ok to discard it here*/
2242 candidate = mono_type_get_underlying_type_any (candidate);
2245 switch (target->type) {
2246 case MONO_TYPE_VOID:
2247 return candidate->type == MONO_TYPE_VOID;
2250 case MONO_TYPE_BOOLEAN:
2252 return IS_ONE_OF3 (candidate->type, MONO_TYPE_I1, MONO_TYPE_U1, MONO_TYPE_BOOLEAN);
2255 case MONO_TYPE_CHAR:
2257 return IS_ONE_OF3 (candidate->type, MONO_TYPE_I2, MONO_TYPE_U2, MONO_TYPE_CHAR);
2259 case MONO_TYPE_U4: {
2260 gboolean is_native_int = IS_ONE_OF2 (candidate->type, MONO_TYPE_I, MONO_TYPE_U);
2261 gboolean is_int4 = IS_ONE_OF2 (candidate->type, MONO_TYPE_I4, MONO_TYPE_U4);
2263 return is_native_int || is_int4;
2264 return is_native_int || get_stack_type (candidate) == TYPE_I4;
2269 return IS_ONE_OF2 (candidate->type, MONO_TYPE_I8, MONO_TYPE_U8);
2274 return candidate->type == target->type;
2275 return IS_ONE_OF2 (candidate->type, MONO_TYPE_R4, MONO_TYPE_R8);
2279 gboolean is_native_int = IS_ONE_OF2 (candidate->type, MONO_TYPE_I, MONO_TYPE_U);
2280 gboolean is_int4 = IS_ONE_OF2 (candidate->type, MONO_TYPE_I4, MONO_TYPE_U4);
2282 return is_native_int || is_int4;
2283 return is_native_int || get_stack_type (candidate) == TYPE_I4;
2287 if (candidate->type != MONO_TYPE_PTR)
2289 /* check the underlying type */
2290 return verify_type_compatibility_full (ctx, target->data.type, candidate->data.type, TRUE);
2292 case MONO_TYPE_FNPTR: {
2293 MonoMethodSignature *left, *right;
2294 if (candidate->type != MONO_TYPE_FNPTR)
2297 left = mono_type_get_signature (target);
2298 right = mono_type_get_signature (candidate);
2299 return mono_metadata_signature_equal (left, right) && left->call_convention == right->call_convention;
2302 case MONO_TYPE_GENERICINST: {
2303 MonoClass *target_klass;
2304 MonoClass *candidate_klass;
2305 if (mono_type_is_enum_type (target)) {
2306 target = mono_type_get_underlying_type_any (target);
2312 * VAR / MVAR compatibility must be checked by verify_stack_type_compatibility
2313 * to take boxing status into account.
2315 if (mono_type_is_generic_argument (original_candidate))
2318 target_klass = mono_class_from_mono_type (target);
2319 candidate_klass = mono_class_from_mono_type (candidate);
2320 if (mono_class_is_nullable (target_klass)) {
2321 if (!mono_class_is_nullable (candidate_klass))
2323 return target_klass == candidate_klass;
2325 return verifier_class_is_assignable_from (target_klass, candidate_klass);
2328 case MONO_TYPE_STRING:
2329 return candidate->type == MONO_TYPE_STRING;
2331 case MONO_TYPE_CLASS:
2333 * VAR / MVAR compatibility must be checked by verify_stack_type_compatibility
2334 * to take boxing status into account.
2336 if (mono_type_is_generic_argument (original_candidate))
2339 if (candidate->type == MONO_TYPE_VALUETYPE)
2342 /* If candidate is an enum it should return true for System.Enum and supertypes.
2343 * That's why here we use the original type and not the underlying type.
2345 return verifier_class_is_assignable_from (target->data.klass, mono_class_from_mono_type (original_candidate));
2347 case MONO_TYPE_OBJECT:
2348 return MONO_TYPE_IS_REFERENCE (candidate);
2350 case MONO_TYPE_SZARRAY: {
2353 if (candidate->type != MONO_TYPE_SZARRAY)
2356 left = mono_class_from_mono_type (target);
2357 right = mono_class_from_mono_type (candidate);
2359 return verifier_class_is_assignable_from (left, right);
2362 case MONO_TYPE_ARRAY:
2363 if (candidate->type != MONO_TYPE_ARRAY)
2365 return is_array_type_compatible (target, candidate);
2367 case MONO_TYPE_TYPEDBYREF:
2368 return candidate->type == MONO_TYPE_TYPEDBYREF;
2370 case MONO_TYPE_VALUETYPE: {
2371 MonoClass *target_klass;
2372 MonoClass *candidate_klass;
2374 if (candidate->type == MONO_TYPE_CLASS)
2377 target_klass = mono_class_from_mono_type (target);
2378 candidate_klass = mono_class_from_mono_type (candidate);
2379 if (target_klass == candidate_klass)
2381 if (mono_type_is_enum_type (target)) {
2382 target = mono_type_get_underlying_type_any (target);
2391 if (candidate->type != MONO_TYPE_VAR)
2393 return mono_type_get_generic_param_num (candidate) == mono_type_get_generic_param_num (target);
2395 case MONO_TYPE_MVAR:
2396 if (candidate->type != MONO_TYPE_MVAR)
2398 return mono_type_get_generic_param_num (candidate) == mono_type_get_generic_param_num (target);
2401 VERIFIER_DEBUG ( printf ("unknown store type %d\n", target->type); );
2402 g_assert_not_reached ();
2411 verify_type_compatibility (VerifyContext *ctx, MonoType *target, MonoType *candidate)
2413 return verify_type_compatibility_full (ctx, target, candidate, FALSE);
2417 * Returns the generic param bound to the context been verified.
2420 static MonoGenericParam*
2421 get_generic_param (VerifyContext *ctx, MonoType *param)
2423 guint16 param_num = mono_type_get_generic_param_num (param);
2424 if (param->type == MONO_TYPE_VAR) {
2425 if (!ctx->generic_context->class_inst || ctx->generic_context->class_inst->type_argc <= param_num) {
2426 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid generic type argument %d", param_num));
2429 return ctx->generic_context->class_inst->type_argv [param_num]->data.generic_param;
2432 /*param must be a MVAR */
2433 if (!ctx->generic_context->method_inst || ctx->generic_context->method_inst->type_argc <= param_num) {
2434 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid generic method argument %d", param_num));
2437 return ctx->generic_context->method_inst->type_argv [param_num]->data.generic_param;
2442 recursive_boxed_constraint_type_check (VerifyContext *ctx, MonoType *type, MonoClass *constraint_class, int recursion_level)
2444 MonoType *constraint_type = &constraint_class->byval_arg;
2445 if (recursion_level <= 0)
2448 if (verify_type_compatibility_full (ctx, type, mono_type_get_type_byval (constraint_type), FALSE))
2451 if (mono_type_is_generic_argument (constraint_type)) {
2452 MonoGenericParam *param = get_generic_param (ctx, constraint_type);
2456 for (klass = mono_generic_param_info (param)->constraints; klass && *klass; ++klass) {
2457 if (recursive_boxed_constraint_type_check (ctx, type, *klass, recursion_level - 1))
2465 * is_compatible_boxed_valuetype:
2467 * Returns: TRUE if @candidate / @stack is a valid boxed valuetype.
2469 * @type The source type. It it tested to be of the proper type.
2470 * @candidate type of the boxed valuetype.
2471 * @stack stack slot of the boxed valuetype, separate from @candidade since one could be changed before calling this function
2472 * @strict if TRUE candidate must be boxed compatible to the target type
2476 is_compatible_boxed_valuetype (VerifyContext *ctx, MonoType *type, MonoType *candidate, ILStackDesc *stack, gboolean strict)
2478 if (!stack_slot_is_boxed_value (stack))
2480 if (type->byref || candidate->byref)
2483 if (mono_type_is_generic_argument (candidate)) {
2484 MonoGenericParam *param = get_generic_param (ctx, candidate);
2489 for (klass = mono_generic_param_info (param)->constraints; klass && *klass; ++klass) {
2490 /*256 should be enough since there can't be more than 255 generic arguments.*/
2491 if (recursive_boxed_constraint_type_check (ctx, type, *klass, 256))
2496 if (mono_type_is_generic_argument (type))
2502 return MONO_TYPE_IS_REFERENCE (type) && verifier_class_is_assignable_from (mono_class_from_mono_type (type), mono_class_from_mono_type (candidate));
2506 verify_stack_type_compatibility_full (VerifyContext *ctx, MonoType *type, ILStackDesc *stack, gboolean drop_byref, gboolean valuetype_must_be_boxed)
2508 MonoType *candidate = mono_type_from_stack_slot (stack);
2509 if (MONO_TYPE_IS_REFERENCE (type) && !type->byref && stack_slot_is_null_literal (stack))
2512 if (is_compatible_boxed_valuetype (ctx, type, candidate, stack, TRUE))
2515 if (valuetype_must_be_boxed && !stack_slot_is_boxed_value (stack) && !MONO_TYPE_IS_REFERENCE (candidate))
2518 if (!valuetype_must_be_boxed && stack_slot_is_boxed_value (stack))
2522 return verify_type_compatibility_full (ctx, type, mono_type_get_type_byval (candidate), FALSE);
2524 /* Handle how Roslyn emit fixed statements by encoding it as byref */
2525 if (type->byref && candidate->byref && (type->type == MONO_TYPE_I) && !mono_type_is_reference (candidate)) {
2526 if (!IS_STRICT_MODE (ctx))
2530 return verify_type_compatibility_full (ctx, type, candidate, FALSE);
2534 verify_stack_type_compatibility (VerifyContext *ctx, MonoType *type, ILStackDesc *stack)
2536 return verify_stack_type_compatibility_full (ctx, type, stack, FALSE, FALSE);
2540 mono_delegate_type_equal (MonoType *target, MonoType *candidate)
2542 if (candidate->byref ^ target->byref)
2545 switch (target->type) {
2546 case MONO_TYPE_VOID:
2549 case MONO_TYPE_BOOLEAN:
2552 case MONO_TYPE_CHAR:
2561 case MONO_TYPE_STRING:
2562 case MONO_TYPE_TYPEDBYREF:
2563 return candidate->type == target->type;
2566 if (candidate->type != MONO_TYPE_PTR)
2568 return mono_delegate_type_equal (target->data.type, candidate->data.type);
2570 case MONO_TYPE_FNPTR:
2571 if (candidate->type != MONO_TYPE_FNPTR)
2573 return mono_delegate_signature_equal (mono_type_get_signature (target), mono_type_get_signature (candidate), FALSE);
2575 case MONO_TYPE_GENERICINST: {
2576 MonoClass *target_klass;
2577 MonoClass *candidate_klass;
2578 target_klass = mono_class_from_mono_type (target);
2579 candidate_klass = mono_class_from_mono_type (candidate);
2580 /*FIXME handle nullables and enum*/
2581 return verifier_class_is_assignable_from (target_klass, candidate_klass);
2583 case MONO_TYPE_OBJECT:
2584 return MONO_TYPE_IS_REFERENCE (candidate);
2586 case MONO_TYPE_CLASS:
2587 return verifier_class_is_assignable_from(target->data.klass, mono_class_from_mono_type (candidate));
2589 case MONO_TYPE_SZARRAY:
2590 if (candidate->type != MONO_TYPE_SZARRAY)
2592 return verifier_class_is_assignable_from (mono_class_from_mono_type (target)->element_class, mono_class_from_mono_type (candidate)->element_class);
2594 case MONO_TYPE_ARRAY:
2595 if (candidate->type != MONO_TYPE_ARRAY)
2597 return is_array_type_compatible (target, candidate);
2599 case MONO_TYPE_VALUETYPE:
2600 /*FIXME handle nullables and enum*/
2601 return mono_class_from_mono_type (candidate) == mono_class_from_mono_type (target);
2604 return candidate->type == MONO_TYPE_VAR && mono_type_get_generic_param_num (target) == mono_type_get_generic_param_num (candidate);
2607 case MONO_TYPE_MVAR:
2608 return candidate->type == MONO_TYPE_MVAR && mono_type_get_generic_param_num (target) == mono_type_get_generic_param_num (candidate);
2612 VERIFIER_DEBUG ( printf ("Unknown type %d. Implement me!\n", target->type); );
2613 g_assert_not_reached ();
2619 mono_delegate_param_equal (MonoType *delegate, MonoType *method)
2621 if (mono_metadata_type_equal_full (delegate, method, TRUE))
2624 return mono_delegate_type_equal (method, delegate);
2628 mono_delegate_ret_equal (MonoType *delegate, MonoType *method)
2630 if (mono_metadata_type_equal_full (delegate, method, TRUE))
2633 return mono_delegate_type_equal (delegate, method);
2637 * mono_delegate_signature_equal:
2639 * Compare two signatures in the way expected by delegates.
2641 * This function only exists due to the fact that it should ignore the 'has_this' part of the signature.
2643 * FIXME can this function be eliminated and proper metadata functionality be used?
2646 mono_delegate_signature_equal (MonoMethodSignature *delegate_sig, MonoMethodSignature *method_sig, gboolean is_static_ldftn)
2649 int method_offset = is_static_ldftn ? 1 : 0;
2651 if (delegate_sig->param_count + method_offset != method_sig->param_count)
2654 if (delegate_sig->call_convention != method_sig->call_convention)
2657 for (i = 0; i < delegate_sig->param_count; i++) {
2658 MonoType *p1 = delegate_sig->params [i];
2659 MonoType *p2 = method_sig->params [i + method_offset];
2661 if (!mono_delegate_param_equal (p1, p2))
2665 if (!mono_delegate_ret_equal (delegate_sig->ret, method_sig->ret))
2672 mono_verifier_is_signature_compatible (MonoMethodSignature *target, MonoMethodSignature *candidate)
2674 return mono_delegate_signature_equal (target, candidate, FALSE);
2678 * verify_ldftn_delegate:
2680 * Verify properties of ldftn based delegates.
2683 verify_ldftn_delegate (VerifyContext *ctx, MonoClass *delegate, ILStackDesc *value, ILStackDesc *funptr)
2685 MonoMethod *method = funptr->method;
2687 /*ldftn non-final virtuals only allowed if method is not static,
2688 * the object is a this arg (comes from a ldarg.0), and there is no starg.0.
2689 * This rules doesn't apply if the object on stack is a boxed valuetype.
2691 if ((method->flags & METHOD_ATTRIBUTE_VIRTUAL) && !(method->flags & METHOD_ATTRIBUTE_FINAL) && !(method->klass->flags & TYPE_ATTRIBUTE_SEALED) && !stack_slot_is_boxed_value (value)) {
2692 /*A stdarg 0 must not happen, we fail here only in fail fast mode to avoid double error reports*/
2693 if (IS_FAIL_FAST_MODE (ctx) && ctx->has_this_store)
2694 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid ldftn with virtual function in method with stdarg 0 at 0x%04x", ctx->ip_offset));
2696 /*current method must not be static*/
2697 if (ctx->method->flags & METHOD_ATTRIBUTE_STATIC)
2698 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid ldftn with virtual function at 0x%04x", ctx->ip_offset));
2700 /*value is the this pointer, loaded using ldarg.0 */
2701 if (!stack_slot_is_this_pointer (value))
2702 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));
2704 ctx->code [ctx->ip_offset].flags |= IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL;
2709 * verify_delegate_compatibility:
2711 * Verify delegate creation sequence.
2715 verify_delegate_compatibility (VerifyContext *ctx, MonoClass *delegate, ILStackDesc *value, ILStackDesc *funptr)
2717 #define IS_VALID_OPCODE(offset, opcode) (ip [ip_offset - offset] == opcode && (ctx->code [ip_offset - offset].flags & IL_CODE_FLAG_SEEN))
2718 #define IS_LOAD_FUN_PTR(kind) (IS_VALID_OPCODE (6, CEE_PREFIX1) && ip [ip_offset - 5] == kind)
2720 MonoMethod *invoke, *method;
2721 const guint8 *ip = ctx->header->code;
2722 guint32 ip_offset = ctx->ip_offset;
2723 gboolean is_static_ldftn = FALSE, is_first_arg_bound = FALSE;
2725 if (stack_slot_get_type (funptr) != TYPE_PTR || !funptr->method) {
2726 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid function pointer parameter for delegate constructor at 0x%04x", ctx->ip_offset));
2730 invoke = mono_get_delegate_invoke (delegate);
2731 method = funptr->method;
2733 if (!method || !mono_method_signature (method)) {
2734 char *name = mono_type_get_full_name (delegate);
2735 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid method on stack to create delegate %s construction at 0x%04x", name, ctx->ip_offset));
2740 if (!invoke || !mono_method_signature (invoke)) {
2741 char *name = mono_type_get_full_name (delegate);
2742 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Delegate type %s with bad Invoke method at 0x%04x", name, ctx->ip_offset));
2747 is_static_ldftn = (ip_offset > 5 && IS_LOAD_FUN_PTR (CEE_LDFTN)) && method->flags & METHOD_ATTRIBUTE_STATIC;
2749 if (is_static_ldftn)
2750 is_first_arg_bound = mono_method_signature (invoke)->param_count + 1 == mono_method_signature (method)->param_count;
2752 if (!mono_delegate_signature_equal (mono_method_signature (invoke), mono_method_signature (method), is_first_arg_bound)) {
2753 char *fun_sig = mono_signature_get_desc (mono_method_signature (method), FALSE);
2754 char *invoke_sig = mono_signature_get_desc (mono_method_signature (invoke), FALSE);
2755 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));
2757 g_free (invoke_sig);
2761 * Delegate code sequences:
2767 * [-6] ldvirtftn token
2771 if (ip_offset > 5 && IS_LOAD_FUN_PTR (CEE_LDFTN)) {
2772 verify_ldftn_delegate (ctx, delegate, value, funptr);
2773 } else if (ip_offset > 6 && IS_VALID_OPCODE (7, CEE_DUP) && IS_LOAD_FUN_PTR (CEE_LDVIRTFTN)) {
2774 ctx->code [ip_offset - 6].flags |= IL_CODE_DELEGATE_SEQUENCE;
2776 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid code sequence for delegate creation at 0x%04x", ctx->ip_offset));
2778 ctx->code [ip_offset].flags |= IL_CODE_DELEGATE_SEQUENCE;
2781 if (is_first_arg_bound) {
2782 if (mono_method_signature (method)->param_count == 0 || !verify_stack_type_compatibility_full (ctx, mono_method_signature (method)->params [0], value, FALSE, TRUE))
2783 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("This object not compatible with function pointer for delegate creation at 0x%04x", ctx->ip_offset));
2785 if (method->flags & METHOD_ATTRIBUTE_STATIC) {
2786 if (!stack_slot_is_null_literal (value) && !is_first_arg_bound)
2787 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Non-null this args used with static function for delegate creation at 0x%04x", ctx->ip_offset));
2789 if (!verify_stack_type_compatibility_full (ctx, &method->klass->byval_arg, value, FALSE, TRUE) && !stack_slot_is_null_literal (value))
2790 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("This object not compatible with function pointer for delegate creation at 0x%04x", ctx->ip_offset));
2794 if (stack_slot_get_type (value) != TYPE_COMPLEX)
2795 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid first parameter for delegate creation at 0x%04x", ctx->ip_offset));
2797 #undef IS_VALID_OPCODE
2798 #undef IS_LOAD_FUN_PTR
2801 /* implement the opcode checks*/
2803 push_arg (VerifyContext *ctx, unsigned int arg, int take_addr)
2807 if (arg >= ctx->max_args) {
2809 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have argument %d", arg + 1));
2811 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method doesn't have argument %d", arg + 1));
2812 if (check_overflow (ctx)) //FIXME: what sane value could we ever push?
2813 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
2815 } else if (check_overflow (ctx)) {
2816 /*We must let the value be pushed, otherwise we would get an underflow error*/
2817 check_unverifiable_type (ctx, ctx->params [arg]);
2818 if (ctx->params [arg]->byref && take_addr)
2819 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ByRef of ByRef at 0x%04x", ctx->ip_offset));
2820 top = stack_push (ctx);
2821 if (!set_stack_value (ctx, top, ctx->params [arg], take_addr))
2824 if (arg == 0 && !(ctx->method->flags & METHOD_ATTRIBUTE_STATIC)) {
2826 ctx->has_this_store = TRUE;
2828 top->stype |= THIS_POINTER_MASK;
2829 if (mono_method_is_constructor (ctx->method) && !ctx->super_ctor_called && !ctx->method->klass->valuetype)
2830 top->stype |= UNINIT_THIS_MASK;
2836 push_local (VerifyContext *ctx, guint32 arg, int take_addr)
2838 if (arg >= ctx->num_locals) {
2839 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have local %d", arg + 1));
2840 } else if (check_overflow (ctx)) {
2841 /*We must let the value be pushed, otherwise we would get an underflow error*/
2842 check_unverifiable_type (ctx, ctx->locals [arg]);
2843 if (ctx->locals [arg]->byref && take_addr)
2844 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ByRef of ByRef at 0x%04x", ctx->ip_offset));
2846 set_stack_value (ctx, stack_push (ctx), ctx->locals [arg], take_addr);
2851 store_arg (VerifyContext *ctx, guint32 arg)
2855 if (arg >= ctx->max_args) {
2856 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method doesn't have argument %d at 0x%04x", arg + 1, ctx->ip_offset));
2857 if (check_underflow (ctx, 1))
2862 if (check_underflow (ctx, 1)) {
2863 value = stack_pop (ctx);
2864 if (!verify_stack_type_compatibility (ctx, ctx->params [arg], value)) {
2865 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type %s in argument store at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
2868 if (arg == 0 && !(ctx->method->flags & METHOD_ATTRIBUTE_STATIC))
2869 ctx->has_this_store = 1;
2873 store_local (VerifyContext *ctx, guint32 arg)
2876 if (arg >= ctx->num_locals) {
2877 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have local var %d at 0x%04x", arg + 1, ctx->ip_offset));
2881 /*TODO verify definite assigment */
2882 if (!check_underflow (ctx, 1))
2885 value = stack_pop (ctx);
2886 if (ctx->locals [arg]->byref && stack_slot_is_managed_mutability_pointer (value))
2887 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));
2889 if (!verify_stack_type_compatibility (ctx, ctx->locals [arg], value)) {
2890 char *expected = mono_type_full_name (ctx->locals [arg]);
2891 char *found = stack_slot_full_name (value);
2892 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type '%s' on stack cannot be stored to local %d with type '%s' at 0x%04x",
2902 /*FIXME add and sub needs special care here*/
2904 do_binop (VerifyContext *ctx, unsigned int opcode, const unsigned char table [TYPE_MAX][TYPE_MAX])
2906 ILStackDesc *a, *b, *top;
2907 int idxa, idxb, complexMerge = 0;
2910 if (!check_underflow (ctx, 2))
2912 b = stack_pop (ctx);
2913 a = stack_pop (ctx);
2915 idxa = stack_slot_get_underlying_type (a);
2916 if (stack_slot_is_managed_pointer (a)) {
2921 idxb = stack_slot_get_underlying_type (b);
2922 if (stack_slot_is_managed_pointer (b)) {
2929 res = table [idxa][idxb];
2931 VERIFIER_DEBUG ( printf ("binop res %d\n", res); );
2932 VERIFIER_DEBUG ( printf ("idxa %d idxb %d\n", idxa, idxb); );
2934 top = stack_push (ctx);
2935 if (res == TYPE_INV) {
2936 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)));
2937 copy_stack_value (top, a);
2941 if (res & NON_VERIFIABLE_RESULT) {
2942 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)));
2944 res = res & ~NON_VERIFIABLE_RESULT;
2947 if (complexMerge && res == TYPE_PTR) {
2948 if (complexMerge == 1)
2949 copy_stack_value (top, a);
2950 else if (complexMerge == 2)
2951 copy_stack_value (top, b);
2953 * There is no need to merge the type of two pointers.
2954 * The only valid operation is subtraction, that returns a native
2955 * int as result and can be used with any 2 pointer kinds.
2956 * This is valid acording to Patition III 1.1.4
2965 do_boolean_branch_op (VerifyContext *ctx, int delta)
2967 int target = ctx->ip_offset + delta;
2970 VERIFIER_DEBUG ( printf ("boolean branch offset %d delta %d target %d\n", ctx->ip_offset, delta, target); );
2972 if (target < 0 || target >= ctx->code_size) {
2973 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Boolean branch target out of code at 0x%04x", ctx->ip_offset));
2977 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
2979 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
2982 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
2986 ctx->target = target;
2988 if (!check_underflow (ctx, 1))
2991 top = stack_pop (ctx);
2992 if (!is_valid_bool_arg (top))
2993 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));
2995 check_unmanaged_pointer (ctx, top);
2999 stack_slot_is_complex_type_not_reference_type (ILStackDesc *slot)
3001 return stack_slot_get_type (slot) == TYPE_COMPLEX && !MONO_TYPE_IS_REFERENCE (slot->type) && !stack_slot_is_boxed_value (slot);
3005 stack_slot_is_reference_value (ILStackDesc *slot)
3007 return stack_slot_get_type (slot) == TYPE_COMPLEX && (MONO_TYPE_IS_REFERENCE (slot->type) || stack_slot_is_boxed_value (slot));
3011 do_branch_op (VerifyContext *ctx, signed int delta, const unsigned char table [TYPE_MAX][TYPE_MAX])
3016 int target = ctx->ip_offset + delta;
3018 VERIFIER_DEBUG ( printf ("branch offset %d delta %d target %d\n", ctx->ip_offset, delta, target); );
3020 if (target < 0 || target >= ctx->code_size) {
3021 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target out of code at 0x%04x", ctx->ip_offset));
3025 switch (is_valid_cmp_branch_instruction (ctx->header, ctx->ip_offset, target)) {
3026 case 1: /*FIXME use constants and not magic numbers.*/
3027 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
3030 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
3034 ctx->target = target;
3036 if (!check_underflow (ctx, 2))
3039 b = stack_pop (ctx);
3040 a = stack_pop (ctx);
3042 idxa = stack_slot_get_underlying_type (a);
3043 if (stack_slot_is_managed_pointer (a))
3046 idxb = stack_slot_get_underlying_type (b);
3047 if (stack_slot_is_managed_pointer (b))
3050 if (stack_slot_is_complex_type_not_reference_type (a) || stack_slot_is_complex_type_not_reference_type (b)) {
3055 res = table [idxa][idxb];
3058 VERIFIER_DEBUG ( printf ("branch res %d\n", res); );
3059 VERIFIER_DEBUG ( printf ("idxa %d idxb %d\n", idxa, idxb); );
3061 if (res == TYPE_INV) {
3062 CODE_NOT_VERIFIABLE (ctx,
3063 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));
3064 } else if (res & NON_VERIFIABLE_RESULT) {
3065 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));
3066 res = res & ~NON_VERIFIABLE_RESULT;
3071 do_cmp_op (VerifyContext *ctx, const unsigned char table [TYPE_MAX][TYPE_MAX], guint32 opcode)
3077 if (!check_underflow (ctx, 2))
3079 b = stack_pop (ctx);
3080 a = stack_pop (ctx);
3082 if (opcode == CEE_CGT_UN) {
3083 if ((stack_slot_is_reference_value (a) && stack_slot_is_null_literal (b)) ||
3084 (stack_slot_is_reference_value (b) && stack_slot_is_null_literal (a))) {
3085 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3090 idxa = stack_slot_get_underlying_type (a);
3091 if (stack_slot_is_managed_pointer (a))
3094 idxb = stack_slot_get_underlying_type (b);
3095 if (stack_slot_is_managed_pointer (b))
3098 if (stack_slot_is_complex_type_not_reference_type (a) || stack_slot_is_complex_type_not_reference_type (b)) {
3103 res = table [idxa][idxb];
3106 if(res == TYPE_INV) {
3107 char *left_type = stack_slot_full_name (a);
3108 char *right_type = stack_slot_full_name (b);
3109 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));
3111 g_free (right_type);
3112 } else if (res & NON_VERIFIABLE_RESULT) {
3113 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));
3114 res = res & ~NON_VERIFIABLE_RESULT;
3116 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3120 do_ret (VerifyContext *ctx)
3122 MonoType *ret = ctx->signature->ret;
3123 VERIFIER_DEBUG ( printf ("checking ret\n"); );
3124 if (ret->type != MONO_TYPE_VOID) {
3126 if (!check_underflow (ctx, 1))
3129 top = stack_pop(ctx);
3131 if (!verify_stack_type_compatibility (ctx, ctx->signature->ret, top)) {
3132 char *ret_type = mono_type_full_name (ctx->signature->ret);
3133 char *stack_type = stack_slot_full_name (top);
3134 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));
3135 g_free (stack_type);
3140 if (ret->byref || ret->type == MONO_TYPE_TYPEDBYREF || mono_type_is_value_type (ret, "System", "ArgIterator") || mono_type_is_value_type (ret, "System", "RuntimeArgumentHandle"))
3141 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method returns byref, TypedReference, ArgIterator or RuntimeArgumentHandle at 0x%04x", ctx->ip_offset));
3144 if (ctx->eval.size > 0) {
3145 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack not empty (%d) after ret at 0x%04x", ctx->eval.size, ctx->ip_offset));
3147 if (in_any_block (ctx->header, ctx->ip_offset))
3148 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ret cannot escape exception blocks at 0x%04x", ctx->ip_offset));
3152 * 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.
3153 * This is illegal but mono_get_method_full decoded it.
3154 * TODO handle calling .ctor outside one or calling the .ctor for other class but super
3157 do_invoke_method (VerifyContext *ctx, int method_token, gboolean virtual_)
3161 MonoMethodSignature *sig;
3164 gboolean virt_check_this = FALSE;
3165 gboolean constrained = ctx->prefix_set & PREFIX_CONSTRAINED;
3167 if (!(method = verifier_load_method (ctx, method_token, virtual_ ? "callvirt" : "call")))
3171 CLEAR_PREFIX (ctx, PREFIX_CONSTRAINED);
3173 if (method->klass->valuetype) // && !constrained ???
3174 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use callvirtual with valuetype method at 0x%04x", ctx->ip_offset));
3176 if ((method->flags & METHOD_ATTRIBUTE_STATIC))
3177 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use callvirtual with static method at 0x%04x", ctx->ip_offset));
3180 if (method->flags & METHOD_ATTRIBUTE_ABSTRACT)
3181 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use call with an abstract method at 0x%04x", ctx->ip_offset));
3183 if ((method->flags & METHOD_ATTRIBUTE_VIRTUAL) && !(method->flags & METHOD_ATTRIBUTE_FINAL) && !(method->klass->flags & TYPE_ATTRIBUTE_SEALED)) {
3184 virt_check_this = TRUE;
3185 ctx->code [ctx->ip_offset].flags |= IL_CODE_CALL_NONFINAL_VIRTUAL;
3189 if (!(sig = mono_method_get_signature_checked (method, ctx->image, method_token, ctx->generic_context, &error))) {
3190 mono_error_cleanup (&error);
3191 sig = mono_method_get_signature_checked (method, ctx->image, method_token, NULL, &error);
3195 char *name = mono_type_get_full_name (method->klass);
3196 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)));
3197 mono_error_cleanup (&error);
3202 param_count = sig->param_count + sig->hasthis;
3203 if (!check_underflow (ctx, param_count))
3206 for (i = sig->param_count - 1; i >= 0; --i) {
3207 VERIFIER_DEBUG ( printf ("verifying argument %d\n", i); );
3208 value = stack_pop (ctx);
3209 if (!verify_stack_type_compatibility (ctx, sig->params[i], value)) {
3210 char *stack_name = stack_slot_full_name (value);
3211 char *sig_name = mono_type_full_name (sig->params [i]);
3212 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));
3213 g_free (stack_name);
3217 if (stack_slot_is_managed_mutability_pointer (value))
3218 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));
3220 if ((ctx->prefix_set & PREFIX_TAIL) && stack_slot_is_managed_pointer (value)) {
3221 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));
3227 MonoType *type = &method->klass->byval_arg;
3230 if (mono_method_is_constructor (method) && !method->klass->valuetype) {
3231 if (IS_STRICT_MODE (ctx) && !mono_method_is_constructor (ctx->method))
3232 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot call a constructor outside one at 0x%04x", ctx->ip_offset));
3233 if (IS_STRICT_MODE (ctx) && method->klass != ctx->method->klass->parent && method->klass != ctx->method->klass)
3234 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));
3236 ctx->super_ctor_called = TRUE;
3237 value = stack_pop_safe (ctx);
3238 if (IS_STRICT_MODE (ctx) && (value->stype & THIS_POINTER_MASK) != THIS_POINTER_MASK)
3239 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid 'this ptr' argument for constructor at 0x%04x", ctx->ip_offset));
3241 value = stack_pop (ctx);
3244 copy_stack_value (©, value);
3245 //TODO we should extract this to a 'drop_byref_argument' and use everywhere
3246 //Other parts of the code suffer from the same issue of
3247 copy.type = mono_type_get_type_byval (copy.type);
3248 copy.stype &= ~POINTER_MASK;
3250 if (virt_check_this && !stack_slot_is_this_pointer (value) && !(method->klass->valuetype || stack_slot_is_boxed_value (value)))
3251 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));
3253 if (constrained && virtual_) {
3254 if (!stack_slot_is_managed_pointer (value))
3255 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Object is not a managed pointer for a constrained call at 0x%04x", ctx->ip_offset));
3256 if (!mono_metadata_type_equal_full (mono_type_get_type_byval (value->type), mono_type_get_underlying_type (ctx->constrained_type), TRUE))
3257 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Object not compatible with constrained type at 0x%04x", ctx->ip_offset));
3258 copy.stype |= BOXED_MASK;
3259 copy.type = ctx->constrained_type;
3261 if (stack_slot_is_managed_pointer (value) && !mono_class_from_mono_type (value->type)->valuetype)
3262 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));
3264 if (!virtual_ && mono_class_from_mono_type (value->type)->valuetype && !method->klass->valuetype && !stack_slot_is_boxed_value (value))
3265 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot call a valuetype baseclass at 0x%04x", ctx->ip_offset));
3267 if (virtual_ && mono_class_from_mono_type (value->type)->valuetype && !stack_slot_is_boxed_value (value))
3268 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a valuetype with callvirt at 0x%04x", ctx->ip_offset));
3270 if (method->klass->valuetype && (stack_slot_is_boxed_value (value) || !stack_slot_is_managed_pointer (value)))
3271 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));
3273 if (!verify_stack_type_compatibility (ctx, type, ©)) {
3274 char *expected = mono_type_full_name (type);
3275 char *effective = stack_slot_full_name (©);
3276 char *method_name = mono_method_full_name (method, TRUE);
3277 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",
3278 expected, effective, method_name, ctx->ip_offset));
3279 g_free (method_name);
3284 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, mono_class_from_mono_type (value->type))) {
3285 char *name = mono_method_full_name (method, TRUE);
3286 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Method %s is not accessible at 0x%04x", name, ctx->ip_offset), MONO_EXCEPTION_METHOD_ACCESS);
3290 } else if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, NULL)) {
3291 char *name = mono_method_full_name (method, TRUE);
3292 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Method %s is not accessible at 0x%04x", name, ctx->ip_offset), MONO_EXCEPTION_METHOD_ACCESS);
3296 if (sig->ret->type != MONO_TYPE_VOID) {
3297 if (!mono_type_is_valid_in_context (ctx, sig->ret))
3300 if (check_overflow (ctx)) {
3301 value = stack_push (ctx);
3302 set_stack_value (ctx, value, sig->ret, FALSE);
3303 if ((ctx->prefix_set & PREFIX_READONLY) && method->klass->rank && !strcmp (method->name, "Address")) {
3304 ctx->prefix_set &= ~PREFIX_READONLY;
3305 value->stype |= CMMP_MASK;
3310 if ((ctx->prefix_set & PREFIX_TAIL)) {
3311 if (!mono_delegate_ret_equal (mono_method_signature (ctx->method)->ret, sig->ret))
3312 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Tail call with incompatible return type at 0x%04x", ctx->ip_offset));
3313 if (ctx->header->code [ctx->ip_offset + 5] != CEE_RET)
3314 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Tail call not followed by ret at 0x%04x", ctx->ip_offset));
3320 do_push_static_field (VerifyContext *ctx, int token, gboolean take_addr)
3322 MonoClassField *field;
3324 if (!check_overflow (ctx))
3327 CLEAR_PREFIX (ctx, PREFIX_VOLATILE);
3329 if (!(field = verifier_load_field (ctx, token, &klass, take_addr ? "ldsflda" : "ldsfld")))
3332 if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC)) {
3333 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot load non static field at 0x%04x", ctx->ip_offset));
3336 /*taking the address of initonly field only works from the static constructor */
3337 if (take_addr && (field->type->attrs & FIELD_ATTRIBUTE_INIT_ONLY) &&
3338 !(field->parent == ctx->method->klass && (ctx->method->flags & (METHOD_ATTRIBUTE_SPECIAL_NAME | METHOD_ATTRIBUTE_STATIC)) && !strcmp (".cctor", ctx->method->name)))
3339 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a init-only field at 0x%04x", ctx->ip_offset));
3341 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3342 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3344 set_stack_value (ctx, stack_push (ctx), field->type, take_addr);
3348 do_store_static_field (VerifyContext *ctx, int token) {
3349 MonoClassField *field;
3352 CLEAR_PREFIX (ctx, PREFIX_VOLATILE);
3354 if (!check_underflow (ctx, 1))
3357 value = stack_pop (ctx);
3359 if (!(field = verifier_load_field (ctx, token, &klass, "stsfld")))
3362 if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC)) {
3363 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot store non static field at 0x%04x", ctx->ip_offset));
3367 if (field->type->type == MONO_TYPE_TYPEDBYREF) {
3368 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Typedbyref field is an unverfiable type in store static field at 0x%04x", ctx->ip_offset));
3372 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3373 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3375 if (!verify_stack_type_compatibility (ctx, field->type, value)) {
3376 char *stack_name = stack_slot_full_name (value);
3377 char *field_name = mono_type_full_name (field->type);
3378 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type in static field store expected '%s' but found '%s' at 0x%04x",
3379 field_name, stack_name, ctx->ip_offset));
3380 g_free (field_name);
3381 g_free (stack_name);
3386 check_is_valid_type_for_field_ops (VerifyContext *ctx, int token, ILStackDesc *obj, MonoClassField **ret_field, const char *opcode)
3388 MonoClassField *field;
3390 gboolean is_pointer;
3392 /*must be a reference type, a managed pointer, an unamanaged pointer, or a valuetype*/
3393 if (!(field = verifier_load_field (ctx, token, &klass, opcode)))
3397 //the value on stack is going to be used as a pointer
3398 is_pointer = stack_slot_get_type (obj) == TYPE_PTR || (stack_slot_get_type (obj) == TYPE_NATIVE_INT && !get_stack_type (&field->parent->byval_arg));
3400 if (field->type->type == MONO_TYPE_TYPEDBYREF) {
3401 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Typedbyref field is an unverfiable type at 0x%04x", ctx->ip_offset));
3404 g_assert (obj->type);
3406 /*The value on the stack must be a subclass of the defining type of the field*/
3407 /* we need to check if we can load the field from the stack value*/
3409 if (stack_slot_get_underlying_type (obj) == TYPE_NATIVE_INT)
3410 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Native int is not a verifiable type to reference a field at 0x%04x", ctx->ip_offset));
3412 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3413 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3415 if (!field->parent->valuetype && stack_slot_is_managed_pointer (obj))
3416 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));
3418 /*a value type can be loaded from a value or a managed pointer, but not a boxed object*/
3419 if (field->parent->valuetype && stack_slot_is_boxed_value (obj))
3420 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));
3422 if (!stack_slot_is_null_literal (obj) && !verify_stack_type_compatibility_full (ctx, &field->parent->byval_arg, obj, TRUE, FALSE)) {
3423 char *found = stack_slot_full_name (obj);
3424 char *expected = mono_type_full_name (&field->parent->byval_arg);
3425 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));
3430 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, mono_class_from_mono_type (obj->type)))
3431 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3434 check_unmanaged_pointer (ctx, obj);
3439 do_push_field (VerifyContext *ctx, int token, gboolean take_addr)
3442 MonoClassField *field;
3445 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3447 if (!check_underflow (ctx, 1))
3449 obj = stack_pop_safe (ctx);
3451 if (!check_is_valid_type_for_field_ops (ctx, token, obj, &field, take_addr ? "ldflda" : "ldfld"))
3454 if (take_addr && field->parent->valuetype && !stack_slot_is_managed_pointer (obj))
3455 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a temporary value-type at 0x%04x", ctx->ip_offset));
3457 if (take_addr && (field->type->attrs & FIELD_ATTRIBUTE_INIT_ONLY) &&
3458 !(field->parent == ctx->method->klass && mono_method_is_constructor (ctx->method)))
3459 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a init-only field at 0x%04x", ctx->ip_offset));
3461 set_stack_value (ctx, stack_push (ctx), field->type, take_addr);
3465 do_store_field (VerifyContext *ctx, int token)
3467 ILStackDesc *value, *obj;
3468 MonoClassField *field;
3469 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3471 if (!check_underflow (ctx, 2))
3474 value = stack_pop (ctx);
3475 obj = stack_pop_safe (ctx);
3477 if (!check_is_valid_type_for_field_ops (ctx, token, obj, &field, "stfld"))
3480 if (!verify_stack_type_compatibility (ctx, field->type, value))
3481 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type %s in field store at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3484 /*TODO proper handle for Nullable<T>*/
3486 do_box_value (VerifyContext *ctx, int klass_token)
3489 MonoType *type = get_boxable_mono_type (ctx, klass_token, "box");
3495 if (!check_underflow (ctx, 1))
3498 value = stack_pop (ctx);
3499 /*box is a nop for reference types*/
3501 if (stack_slot_get_underlying_type (value) == TYPE_COMPLEX && MONO_TYPE_IS_REFERENCE (value->type) && MONO_TYPE_IS_REFERENCE (type)) {
3502 stack_push_stack_val (ctx, value)->stype |= BOXED_MASK;
3507 if (!verify_stack_type_compatibility (ctx, type, value))
3508 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for boxing operation at 0x%04x", ctx->ip_offset));
3510 klass = mono_class_from_mono_type (type);
3511 if (mono_class_is_nullable (klass))
3512 type = &mono_class_get_nullable_param (klass)->byval_arg;
3513 stack_push_val (ctx, TYPE_COMPLEX | BOXED_MASK, type);
3517 do_unbox_value (VerifyContext *ctx, int klass_token)
3520 MonoType *type = get_boxable_mono_type (ctx, klass_token, "unbox");
3525 if (!check_underflow (ctx, 1))
3528 if (!mono_class_from_mono_type (type)->valuetype)
3529 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid reference type for unbox at 0x%04x", ctx->ip_offset));
3531 value = stack_pop (ctx);
3533 /*Value should be: a boxed valuetype or a reference type*/
3534 if (!(stack_slot_get_type (value) == TYPE_COMPLEX &&
3535 (stack_slot_is_boxed_value (value) || !mono_class_from_mono_type (value->type)->valuetype)))
3536 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));
3538 set_stack_value (ctx, value = stack_push (ctx), mono_type_get_type_byref (type), FALSE);
3539 value->stype |= CMMP_MASK;
3543 do_unbox_any (VerifyContext *ctx, int klass_token)
3546 MonoType *type = get_boxable_mono_type (ctx, klass_token, "unbox.any");
3551 if (!check_underflow (ctx, 1))
3554 value = stack_pop (ctx);
3556 /*Value should be: a boxed valuetype or a reference type*/
3557 if (!(stack_slot_get_type (value) == TYPE_COMPLEX &&
3558 (stack_slot_is_boxed_value (value) || !mono_class_from_mono_type (value->type)->valuetype)))
3559 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));
3561 set_stack_value (ctx, stack_push (ctx), type, FALSE);
3565 do_unary_math_op (VerifyContext *ctx, int op)
3568 if (!check_underflow (ctx, 1))
3570 value = stack_pop (ctx);
3571 switch (stack_slot_get_type (value)) {
3574 case TYPE_NATIVE_INT:
3579 case TYPE_COMPLEX: /*only enums are ok*/
3580 if (mono_type_is_enum_type (value->type))
3583 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for unary not at 0x%04x", ctx->ip_offset));
3585 stack_push_stack_val (ctx, value);
3589 do_conversion (VerifyContext *ctx, int kind)
3592 if (!check_underflow (ctx, 1))
3594 value = stack_pop (ctx);
3596 switch (stack_slot_get_type (value)) {
3599 case TYPE_NATIVE_INT:
3603 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));
3608 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3611 stack_push_val (ctx,TYPE_I8, &mono_defaults.int64_class->byval_arg);
3614 stack_push_val (ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
3616 case TYPE_NATIVE_INT:
3617 stack_push_val (ctx, TYPE_NATIVE_INT, &mono_defaults.int_class->byval_arg);
3620 g_error ("unknown type %02x in conversion", kind);
3626 do_load_token (VerifyContext *ctx, int token)
3630 MonoClass *handle_class;
3631 if (!check_overflow (ctx))
3634 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
3635 handle = mono_method_get_wrapper_data (ctx->method, token);
3636 handle_class = (MonoClass *)mono_method_get_wrapper_data (ctx->method, token + 1);
3637 if (handle_class == mono_defaults.typehandle_class)
3638 handle = &((MonoClass*)handle)->byval_arg;
3640 switch (token & 0xff000000) {
3641 case MONO_TOKEN_TYPE_DEF:
3642 case MONO_TOKEN_TYPE_REF:
3643 case MONO_TOKEN_TYPE_SPEC:
3644 case MONO_TOKEN_FIELD_DEF:
3645 case MONO_TOKEN_METHOD_DEF:
3646 case MONO_TOKEN_METHOD_SPEC:
3647 case MONO_TOKEN_MEMBER_REF:
3648 if (!token_bounds_check (ctx->image, token)) {
3649 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));
3654 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));
3658 handle = mono_ldtoken_checked (ctx->image, token, &handle_class, ctx->generic_context, &error);
3662 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)));
3663 mono_error_cleanup (&error);
3666 if (handle_class == mono_defaults.typehandle_class) {
3667 mono_type_is_valid_in_context (ctx, (MonoType*)handle);
3668 } else if (handle_class == mono_defaults.methodhandle_class) {
3669 mono_method_is_valid_in_context (ctx, (MonoMethod*)handle);
3670 } else if (handle_class == mono_defaults.fieldhandle_class) {
3671 mono_type_is_valid_in_context (ctx, &((MonoClassField*)handle)->parent->byval_arg);
3673 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid ldtoken type %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
3675 stack_push_val (ctx, TYPE_COMPLEX, mono_class_get_type (handle_class));
3679 do_ldobj_value (VerifyContext *ctx, int token)
3682 MonoType *type = get_boxable_mono_type (ctx, token, "ldobj");
3683 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3688 if (!check_underflow (ctx, 1))
3691 value = stack_pop (ctx);
3692 if (!stack_slot_is_managed_pointer (value)
3693 && stack_slot_get_type (value) != TYPE_NATIVE_INT
3694 && !(stack_slot_get_type (value) == TYPE_PTR && value->type->type != MONO_TYPE_FNPTR)) {
3695 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid argument %s to ldobj at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3699 if (stack_slot_get_type (value) == TYPE_NATIVE_INT)
3700 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Using native pointer to ldobj at 0x%04x", ctx->ip_offset));
3702 /*We have a byval on the stack, but the comparison must be strict. */
3703 if (!verify_type_compatibility_full (ctx, type, mono_type_get_type_byval (value->type), TRUE))
3704 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldojb operation at 0x%04x", ctx->ip_offset));
3706 set_stack_value (ctx, stack_push (ctx), type, FALSE);
3710 do_stobj (VerifyContext *ctx, int token)
3712 ILStackDesc *dest, *src;
3713 MonoType *type = get_boxable_mono_type (ctx, token, "stobj");
3714 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3719 if (!check_underflow (ctx, 2))
3722 src = stack_pop (ctx);
3723 dest = stack_pop (ctx);
3725 if (stack_slot_is_managed_mutability_pointer (dest))
3726 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with stobj at 0x%04x", ctx->ip_offset));
3728 if (!stack_slot_is_managed_pointer (dest))
3729 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid destination of stobj operation at 0x%04x", ctx->ip_offset));
3731 if (stack_slot_is_boxed_value (src) && !MONO_TYPE_IS_REFERENCE (src->type) && !MONO_TYPE_IS_REFERENCE (type))
3732 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));
3734 if (!verify_stack_type_compatibility (ctx, type, src)) {
3735 char *type_name = mono_type_full_name (type);
3736 char *src_name = stack_slot_full_name (src);
3737 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));
3742 if (!verify_type_compatibility (ctx, mono_type_get_type_byval (dest->type), type))
3743 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Destination and token types of stobj don't match at 0x%04x", ctx->ip_offset));
3747 do_cpobj (VerifyContext *ctx, int token)
3749 ILStackDesc *dest, *src;
3750 MonoType *type = get_boxable_mono_type (ctx, token, "cpobj");
3754 if (!check_underflow (ctx, 2))
3757 src = stack_pop (ctx);
3758 dest = stack_pop (ctx);
3760 if (!stack_slot_is_managed_pointer (src))
3761 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid source of cpobj operation at 0x%04x", ctx->ip_offset));
3763 if (!stack_slot_is_managed_pointer (dest))
3764 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid destination of cpobj operation at 0x%04x", ctx->ip_offset));
3766 if (stack_slot_is_managed_mutability_pointer (dest))
3767 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with cpobj at 0x%04x", ctx->ip_offset));
3769 if (!verify_type_compatibility (ctx, type, mono_type_get_type_byval (src->type)))
3770 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Token and source types of cpobj don't match at 0x%04x", ctx->ip_offset));
3772 if (!verify_type_compatibility (ctx, mono_type_get_type_byval (dest->type), type))
3773 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Destination and token types of cpobj don't match at 0x%04x", ctx->ip_offset));
3777 do_initobj (VerifyContext *ctx, int token)
3780 MonoType *stack, *type = get_boxable_mono_type (ctx, token, "initobj");
3784 if (!check_underflow (ctx, 1))
3787 obj = stack_pop (ctx);
3789 if (!stack_slot_is_managed_pointer (obj))
3790 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid object address for initobj at 0x%04x", ctx->ip_offset));
3792 if (stack_slot_is_managed_mutability_pointer (obj))
3793 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with initobj at 0x%04x", ctx->ip_offset));
3795 stack = mono_type_get_type_byval (obj->type);
3796 if (MONO_TYPE_IS_REFERENCE (stack)) {
3797 if (!verify_type_compatibility (ctx, stack, type))
3798 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type token of initobj not compatible with value on stack at 0x%04x", ctx->ip_offset));
3799 else if (IS_STRICT_MODE (ctx) && !mono_metadata_type_equal (type, stack))
3800 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type token of initobj not compatible with value on stack at 0x%04x", ctx->ip_offset));
3801 } else if (!verify_type_compatibility (ctx, stack, type)) {
3802 char *expected_name = mono_type_full_name (type);
3803 char *stack_name = mono_type_full_name (stack);
3805 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));
3806 g_free (expected_name);
3807 g_free (stack_name);
3812 do_newobj (VerifyContext *ctx, int token)
3816 MonoMethodSignature *sig;
3818 gboolean is_delegate = FALSE;
3820 if (!(method = verifier_load_method (ctx, token, "newobj")))
3823 if (!mono_method_is_constructor (method)) {
3824 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method from token 0x%08x not a constructor at 0x%04x", token, ctx->ip_offset));
3828 if (method->klass->flags & (TYPE_ATTRIBUTE_ABSTRACT | TYPE_ATTRIBUTE_INTERFACE))
3829 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Trying to instantiate an abstract or interface type at 0x%04x", ctx->ip_offset));
3831 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, NULL)) {
3832 char *from = mono_method_full_name (ctx->method, TRUE);
3833 char *to = mono_method_full_name (method, TRUE);
3834 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);
3839 //FIXME use mono_method_get_signature_full
3840 sig = mono_method_signature (method);
3842 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid constructor signature to newobj at 0x%04x", ctx->ip_offset));
3846 if (!sig->hasthis) {
3847 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid constructor signature missing hasthis at 0x%04x", ctx->ip_offset));
3851 if (!check_underflow (ctx, sig->param_count))
3854 is_delegate = method->klass->parent == mono_defaults.multicastdelegate_class;
3857 ILStackDesc *funptr;
3858 //first arg is object, second arg is fun ptr
3859 if (sig->param_count != 2) {
3860 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid delegate constructor at 0x%04x", ctx->ip_offset));
3863 funptr = stack_pop (ctx);
3864 value = stack_pop (ctx);
3865 verify_delegate_compatibility (ctx, method->klass, value, funptr);
3867 for (i = sig->param_count - 1; i >= 0; --i) {
3868 VERIFIER_DEBUG ( printf ("verifying constructor argument %d\n", i); );
3869 value = stack_pop (ctx);
3870 if (!verify_stack_type_compatibility (ctx, sig->params [i], value)) {
3871 char *stack_name = stack_slot_full_name (value);
3872 char *sig_name = mono_type_full_name (sig->params [i]);
3873 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));
3874 g_free (stack_name);
3878 if (stack_slot_is_managed_mutability_pointer (value))
3879 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer as argument of newobj at 0x%04x", ctx->ip_offset));
3883 if (check_overflow (ctx))
3884 set_stack_value (ctx, stack_push (ctx), &method->klass->byval_arg, FALSE);
3888 do_cast (VerifyContext *ctx, int token, const char *opcode) {
3894 if (!check_underflow (ctx, 1))
3897 if (!(type = get_boxable_mono_type (ctx, token, opcode)))
3901 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid %s type at 0x%04x", opcode, ctx->ip_offset));
3905 value = stack_pop (ctx);
3906 is_boxed = stack_slot_is_boxed_value (value);
3908 if (stack_slot_is_managed_pointer (value))
3909 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value for %s at 0x%04x", opcode, ctx->ip_offset));
3910 else if (!MONO_TYPE_IS_REFERENCE (value->type) && !is_boxed) {
3911 char *name = stack_slot_full_name (value);
3912 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));
3916 switch (value->type->type) {
3917 case MONO_TYPE_FNPTR:
3919 case MONO_TYPE_TYPEDBYREF:
3920 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value for %s at 0x%04x", opcode, ctx->ip_offset));
3925 do_box = is_boxed || mono_type_is_generic_argument(type) || mono_class_from_mono_type (type)->valuetype;
3926 stack_push_val (ctx, TYPE_COMPLEX | (do_box ? BOXED_MASK : 0), type);
3930 mono_type_from_opcode (int opcode) {
3938 return &mono_defaults.sbyte_class->byval_arg;
3946 return &mono_defaults.int16_class->byval_arg;
3954 return &mono_defaults.int32_class->byval_arg;
3960 return &mono_defaults.int64_class->byval_arg;
3966 return &mono_defaults.single_class->byval_arg;
3972 return &mono_defaults.double_class->byval_arg;
3978 return &mono_defaults.int_class->byval_arg;
3982 case CEE_LDELEM_REF:
3983 case CEE_STELEM_REF:
3984 return &mono_defaults.object_class->byval_arg;
3987 g_error ("unknown opcode %02x in mono_type_from_opcode ", opcode);
3993 do_load_indirect (VerifyContext *ctx, int opcode)
3996 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3998 if (!check_underflow (ctx, 1))
4001 value = stack_pop (ctx);
4002 if (!stack_slot_is_managed_pointer (value)) {
4003 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Load indirect not using a manager pointer at 0x%04x", ctx->ip_offset));
4004 set_stack_value (ctx, stack_push (ctx), mono_type_from_opcode (opcode), FALSE);
4008 if (opcode == CEE_LDIND_REF) {
4009 if (stack_slot_get_underlying_type (value) != TYPE_COMPLEX || mono_class_from_mono_type (value->type)->valuetype)
4010 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldind_ref expected object byref operation at 0x%04x", ctx->ip_offset));
4011 set_stack_value (ctx, stack_push (ctx), mono_type_get_type_byval (value->type), FALSE);
4013 if (!verify_type_compatibility_full (ctx, mono_type_from_opcode (opcode), mono_type_get_type_byval (value->type), TRUE))
4014 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
4015 set_stack_value (ctx, stack_push (ctx), mono_type_from_opcode (opcode), FALSE);
4020 do_store_indirect (VerifyContext *ctx, int opcode)
4022 ILStackDesc *addr, *val;
4023 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
4025 if (!check_underflow (ctx, 2))
4028 val = stack_pop (ctx);
4029 addr = stack_pop (ctx);
4031 check_unmanaged_pointer (ctx, addr);
4033 if (!stack_slot_is_managed_pointer (addr) && stack_slot_get_type (addr) != TYPE_PTR) {
4034 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid non-pointer argument to stind at 0x%04x", ctx->ip_offset));
4038 if (stack_slot_is_managed_mutability_pointer (addr)) {
4039 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with stind at 0x%04x", ctx->ip_offset));
4043 if (!verify_type_compatibility_full (ctx, mono_type_from_opcode (opcode), mono_type_get_type_byval (addr->type), TRUE))
4044 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid addr type at stack for stind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
4046 if (!verify_stack_type_compatibility (ctx, mono_type_from_opcode (opcode), val))
4047 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value type at stack for stind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
4051 do_newarr (VerifyContext *ctx, int token)
4054 MonoType *type = get_boxable_mono_type (ctx, token, "newarr");
4059 if (!check_underflow (ctx, 1))
4062 value = stack_pop (ctx);
4063 if (stack_slot_get_type (value) != TYPE_I4 && stack_slot_get_type (value) != TYPE_NATIVE_INT)
4064 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));
4066 set_stack_value (ctx, stack_push (ctx), mono_class_get_type (mono_array_class_get (mono_class_from_mono_type (type), 1)), FALSE);
4069 /*FIXME handle arrays that are not 0-indexed*/
4071 do_ldlen (VerifyContext *ctx)
4075 if (!check_underflow (ctx, 1))
4078 value = stack_pop (ctx);
4080 if (stack_slot_get_type (value) != TYPE_COMPLEX || value->type->type != MONO_TYPE_SZARRAY)
4081 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type for ldlen at 0x%04x", ctx->ip_offset));
4083 stack_push_val (ctx, TYPE_NATIVE_INT, &mono_defaults.int_class->byval_arg);
4086 /*FIXME handle arrays that are not 0-indexed*/
4087 /*FIXME handle readonly prefix and CMMP*/
4089 do_ldelema (VerifyContext *ctx, int klass_token)
4091 ILStackDesc *index, *array, *res;
4092 MonoType *type = get_boxable_mono_type (ctx, klass_token, "ldelema");
4098 if (!check_underflow (ctx, 2))
4101 index = stack_pop (ctx);
4102 array = stack_pop (ctx);
4104 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4105 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));
4107 if (!stack_slot_is_null_literal (array)) {
4108 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY)
4109 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type(%s) for ldelema at 0x%04x", stack_slot_get_name (array), ctx->ip_offset));
4111 if (get_stack_type (type) == TYPE_I4 || get_stack_type (type) == TYPE_NATIVE_INT) {
4112 valid = verify_type_compatibility_full (ctx, type, &array->type->data.klass->byval_arg, TRUE);
4114 valid = mono_metadata_type_equal (type, &array->type->data.klass->byval_arg);
4117 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelema at 0x%04x", ctx->ip_offset));
4121 res = stack_push (ctx);
4122 set_stack_value (ctx, res, type, TRUE);
4123 if (ctx->prefix_set & PREFIX_READONLY) {
4124 ctx->prefix_set &= ~PREFIX_READONLY;
4125 res->stype |= CMMP_MASK;
4130 * FIXME handle arrays that are not 0-indexed
4131 * FIXME handle readonly prefix and CMMP
4134 do_ldelem (VerifyContext *ctx, int opcode, int token)
4136 #define IS_ONE_OF2(T, A, B) (T == A || T == B)
4137 ILStackDesc *index, *array;
4139 if (!check_underflow (ctx, 2))
4142 if (opcode == CEE_LDELEM) {
4143 if (!(type = verifier_load_type (ctx, token, "ldelem.any"))) {
4144 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Type (0x%08x) not found at 0x%04x", token, ctx->ip_offset));
4148 type = mono_type_from_opcode (opcode);
4151 index = stack_pop (ctx);
4152 array = stack_pop (ctx);
4154 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4155 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));
4157 if (!stack_slot_is_null_literal (array)) {
4158 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY)
4159 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));
4161 if (opcode == CEE_LDELEM_REF) {
4162 if (array->type->data.klass->valuetype)
4163 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type is not a reference type for ldelem.ref 0x%04x", ctx->ip_offset));
4164 type = &array->type->data.klass->byval_arg;
4166 MonoType *candidate = &array->type->data.klass->byval_arg;
4167 if (IS_STRICT_MODE (ctx)) {
4168 MonoType *underlying_type = mono_type_get_underlying_type_any (type);
4169 MonoType *underlying_candidate = mono_type_get_underlying_type_any (candidate);
4170 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)) ||
4171 (IS_ONE_OF2 (underlying_candidate->type, MONO_TYPE_I4, MONO_TYPE_U4) && IS_ONE_OF2 (underlying_type->type, MONO_TYPE_I, MONO_TYPE_U)))
4172 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelem.X at 0x%04x", ctx->ip_offset));
4174 if (!verify_type_compatibility_full (ctx, type, candidate, TRUE))
4175 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelem.X at 0x%04x", ctx->ip_offset));
4180 set_stack_value (ctx, stack_push (ctx), type, FALSE);
4185 * FIXME handle arrays that are not 0-indexed
4188 do_stelem (VerifyContext *ctx, int opcode, int token)
4190 ILStackDesc *index, *array, *value;
4192 if (!check_underflow (ctx, 3))
4195 if (opcode == CEE_STELEM) {
4196 if (!(type = verifier_load_type (ctx, token, "stelem.any"))) {
4197 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Type (0x%08x) not found at 0x%04x", token, ctx->ip_offset));
4201 type = mono_type_from_opcode (opcode);
4204 value = stack_pop (ctx);
4205 index = stack_pop (ctx);
4206 array = stack_pop (ctx);
4208 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4209 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));
4211 if (!stack_slot_is_null_literal (array)) {
4212 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY) {
4213 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));
4215 if (opcode == CEE_STELEM_REF) {
4216 if (array->type->data.klass->valuetype)
4217 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type is not a reference type for stelem.ref 0x%04x", ctx->ip_offset));
4218 } else if (!verify_type_compatibility_full (ctx, &array->type->data.klass->byval_arg, type, TRUE)) {
4219 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for stdelem.X at 0x%04x", ctx->ip_offset));
4223 if (opcode == CEE_STELEM_REF) {
4224 if (!stack_slot_is_boxed_value (value) && mono_class_from_mono_type (value->type)->valuetype)
4225 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value is not a reference type for stelem.ref 0x%04x", ctx->ip_offset));
4226 } else if (opcode != CEE_STELEM_REF) {
4227 if (!verify_stack_type_compatibility (ctx, type, value))
4228 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value on stack for stdelem.X at 0x%04x", ctx->ip_offset));
4230 if (stack_slot_is_boxed_value (value) && !MONO_TYPE_IS_REFERENCE (value->type) && !MONO_TYPE_IS_REFERENCE (type))
4231 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));
4237 do_throw (VerifyContext *ctx)
4239 ILStackDesc *exception;
4240 if (!check_underflow (ctx, 1))
4242 exception = stack_pop (ctx);
4244 if (!stack_slot_is_null_literal (exception) && !(stack_slot_get_type (exception) == TYPE_COMPLEX && !mono_class_from_mono_type (exception->type)->valuetype))
4245 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type on stack for throw, expected reference type at 0x%04x", ctx->ip_offset));
4247 if (mono_type_is_generic_argument (exception->type) && !stack_slot_is_boxed_value (exception)) {
4248 char *name = mono_type_full_name (exception->type);
4249 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));
4252 /*The stack is left empty after a throw*/
4258 do_endfilter (VerifyContext *ctx)
4260 MonoExceptionClause *clause;
4262 if (IS_STRICT_MODE (ctx)) {
4263 if (ctx->eval.size != 1)
4264 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack size must have one item for endfilter at 0x%04x", ctx->ip_offset));
4266 if (ctx->eval.size >= 1 && stack_slot_get_type (stack_pop (ctx)) != TYPE_I4)
4267 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack item type is not an int32 for endfilter at 0x%04x", ctx->ip_offset));
4270 if ((clause = is_correct_endfilter (ctx, ctx->ip_offset))) {
4271 if (IS_STRICT_MODE (ctx)) {
4272 if (ctx->ip_offset != clause->handler_offset - 2)
4273 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter is not the last instruction of the filter clause at 0x%04x", ctx->ip_offset));
4275 if ((ctx->ip_offset != clause->handler_offset - 2) && !MONO_OFFSET_IN_HANDLER (clause, ctx->ip_offset))
4276 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter is not the last instruction of the filter clause at 0x%04x", ctx->ip_offset));
4279 if (IS_STRICT_MODE (ctx) && !is_unverifiable_endfilter (ctx, ctx->ip_offset))
4280 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter outside filter clause at 0x%04x", ctx->ip_offset));
4282 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("endfilter outside filter clause at 0x%04x", ctx->ip_offset));
4289 do_leave (VerifyContext *ctx, int delta)
4291 int target = ((gint32)ctx->ip_offset) + delta;
4292 if (target >= ctx->code_size || target < 0)
4293 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target out of code at 0x%04x", ctx->ip_offset));
4295 if (!is_correct_leave (ctx->header, ctx->ip_offset, target))
4296 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Leave not allowed in finally block at 0x%04x", ctx->ip_offset));
4298 ctx->target = target;
4304 * Verify br and br.s opcodes.
4307 do_static_branch (VerifyContext *ctx, int delta)
4309 int target = ctx->ip_offset + delta;
4310 if (target < 0 || target >= ctx->code_size) {
4311 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("branch target out of code at 0x%04x", ctx->ip_offset));
4315 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
4317 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
4320 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
4324 ctx->target = target;
4328 do_switch (VerifyContext *ctx, int count, const unsigned char *data)
4330 int i, base = ctx->ip_offset + 5 + count * 4;
4333 if (!check_underflow (ctx, 1))
4336 value = stack_pop (ctx);
4338 if (stack_slot_get_type (value) != TYPE_I4 && stack_slot_get_type (value) != TYPE_NATIVE_INT)
4339 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid argument to switch at 0x%04x", ctx->ip_offset));
4341 for (i = 0; i < count; ++i) {
4342 int target = base + read32 (data + i * 4);
4344 if (target < 0 || target >= ctx->code_size) {
4345 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Switch target %x out of code at 0x%04x", i, ctx->ip_offset));
4349 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
4351 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Switch target %x escapes out of exception block at 0x%04x", i, ctx->ip_offset));
4354 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Switch target %x escapes out of exception block at 0x%04x", i, ctx->ip_offset));
4357 merge_stacks (ctx, &ctx->eval, &ctx->code [target], FALSE, TRUE);
4362 do_load_function_ptr (VerifyContext *ctx, guint32 token, gboolean virtual_)
4367 if (virtual_ && !check_underflow (ctx, 1))
4370 if (!virtual_ && !check_overflow (ctx))
4373 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
4374 method = (MonoMethod *)mono_method_get_wrapper_data (ctx->method, (guint32)token);
4376 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid token %x for ldftn at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4380 if (!IS_METHOD_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
4381 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid token %x for ldftn at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4385 if (!(method = verifier_load_method (ctx, token, virtual_ ? "ldvirtfrn" : "ldftn")))
4389 if (mono_method_is_constructor (method))
4390 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use ldftn with a constructor at 0x%04x", ctx->ip_offset));
4393 ILStackDesc *top = stack_pop (ctx);
4395 if (stack_slot_get_type (top) != TYPE_COMPLEX || top->type->type == MONO_TYPE_VALUETYPE)
4396 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid argument to ldvirtftn at 0x%04x", ctx->ip_offset));
4398 if (method->flags & METHOD_ATTRIBUTE_STATIC)
4399 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use ldvirtftn with a constructor at 0x%04x", ctx->ip_offset));
4401 if (!verify_stack_type_compatibility (ctx, &method->klass->byval_arg, top))
4402 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unexpected object for ldvirtftn at 0x%04x", ctx->ip_offset));
4405 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, NULL))
4406 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);
4408 top = stack_push_val(ctx, TYPE_PTR, mono_type_create_fnptr_from_mono_method (ctx, method));
4409 top->method = method;
4413 do_sizeof (VerifyContext *ctx, int token)
4417 if (!(type = verifier_load_type (ctx, token, "sizeof")))
4420 if (type->byref && type->type != MONO_TYPE_TYPEDBYREF) {
4421 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of byref type at 0x%04x", ctx->ip_offset));
4425 if (type->type == MONO_TYPE_VOID) {
4426 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of void type at 0x%04x", ctx->ip_offset));
4430 if (check_overflow (ctx))
4431 set_stack_value (ctx, stack_push (ctx), &mono_defaults.uint32_class->byval_arg, FALSE);
4434 /* Stack top can be of any type, the runtime doesn't care and treat everything as an int. */
4436 do_localloc (VerifyContext *ctx)
4438 if (ctx->eval.size != 1) {
4439 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack must have only size item in localloc at 0x%04x", ctx->ip_offset));
4443 if (in_any_exception_block (ctx->header, ctx->ip_offset)) {
4444 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack must have only size item in localloc at 0x%04x", ctx->ip_offset));
4448 /*TODO verify top type*/
4449 /* top = */ stack_pop (ctx);
4451 set_stack_value (ctx, stack_push (ctx), &mono_defaults.int_class->byval_arg, FALSE);
4452 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Instruction localloc in never verifiable at 0x%04x", ctx->ip_offset));
4456 do_ldstr (VerifyContext *ctx, guint32 token)
4458 GSList *error = NULL;
4459 if (ctx->method->wrapper_type == MONO_WRAPPER_NONE && !image_is_dynamic (ctx->image)) {
4460 if (mono_metadata_token_code (token) != MONO_TOKEN_STRING) {
4461 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid string token %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4465 if (!mono_verifier_verify_string_signature (ctx->image, mono_metadata_token_index (token), &error)) {
4467 ctx->list = g_slist_concat (ctx->list, error);
4468 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid string index %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4473 if (check_overflow (ctx))
4474 stack_push_val (ctx, TYPE_COMPLEX, &mono_defaults.string_class->byval_arg);
4478 do_refanyval (VerifyContext *ctx, int token)
4482 if (!check_underflow (ctx, 1))
4485 if (!(type = get_boxable_mono_type (ctx, token, "refanyval")))
4488 top = stack_pop (ctx);
4490 if (top->stype != TYPE_PTR || top->type->type != MONO_TYPE_TYPEDBYREF)
4491 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Expected a typedref as argument for refanyval, but found %s at 0x%04x", stack_slot_get_name (top), ctx->ip_offset));
4493 set_stack_value (ctx, stack_push (ctx), type, TRUE);
4497 do_refanytype (VerifyContext *ctx)
4501 if (!check_underflow (ctx, 1))
4504 top = stack_pop (ctx);
4506 if (top->stype != TYPE_PTR || top->type->type != MONO_TYPE_TYPEDBYREF)
4507 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));
4509 set_stack_value (ctx, stack_push (ctx), &mono_defaults.typehandle_class->byval_arg, FALSE);
4514 do_mkrefany (VerifyContext *ctx, int token)
4518 if (!check_underflow (ctx, 1))
4521 if (!(type = get_boxable_mono_type (ctx, token, "refanyval")))
4524 top = stack_pop (ctx);
4526 if (stack_slot_is_managed_mutability_pointer (top))
4527 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with mkrefany at 0x%04x", ctx->ip_offset));
4529 if (!stack_slot_is_managed_pointer (top)) {
4530 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));
4532 MonoType *stack_type = mono_type_get_type_byval (top->type);
4533 if (MONO_TYPE_IS_REFERENCE (type) && !mono_metadata_type_equal (type, stack_type))
4534 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type not compatible for mkrefany at 0x%04x", ctx->ip_offset));
4536 if (!MONO_TYPE_IS_REFERENCE (type) && !verify_type_compatibility_full (ctx, type, stack_type, TRUE))
4537 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type not compatible for mkrefany at 0x%04x", ctx->ip_offset));
4540 set_stack_value (ctx, stack_push (ctx), &mono_defaults.typed_reference_class->byval_arg, FALSE);
4544 do_ckfinite (VerifyContext *ctx)
4547 if (!check_underflow (ctx, 1))
4550 top = stack_pop (ctx);
4552 if (stack_slot_get_underlying_type (top) != TYPE_R8)
4553 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));
4554 stack_push_stack_val (ctx, top);
4558 * Merge the stacks and perform compat checks. The merge check if types of @from are mergeable with type of @to
4560 * @from holds new values for a given control path
4561 * @to holds the current values of a given control path
4563 * TODO we can eliminate the from argument as all callers pass &ctx->eval
4566 merge_stacks (VerifyContext *ctx, ILCodeDesc *from, ILCodeDesc *to, gboolean start, gboolean external)
4570 stack_init (ctx, to);
4573 if (to->flags == IL_CODE_FLAG_NOT_PROCESSED)
4576 stack_copy (&ctx->eval, to);
4578 } else if (!(to->flags & IL_CODE_STACK_MERGED)) {
4579 stack_copy (to, &ctx->eval);
4582 VERIFIER_DEBUG ( printf ("performing stack merge %d x %d\n", from->size, to->size); );
4584 if (from->size != to->size) {
4585 VERIFIER_DEBUG ( printf ("different stack sizes %d x %d at 0x%04x\n", from->size, to->size, ctx->ip_offset); );
4586 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));
4590 //FIXME we need to preserve CMMP attributes
4591 //FIXME we must take null literals into consideration.
4592 for (i = 0; i < from->size; ++i) {
4593 ILStackDesc *new_slot = from->stack + i;
4594 ILStackDesc *old_slot = to->stack + i;
4595 MonoType *new_type = mono_type_from_stack_slot (new_slot);
4596 MonoType *old_type = mono_type_from_stack_slot (old_slot);
4597 MonoClass *old_class = mono_class_from_mono_type (old_type);
4598 MonoClass *new_class = mono_class_from_mono_type (new_type);
4599 MonoClass *match_class = NULL;
4601 // S := T then U = S (new value is compatible with current value, keep current)
4602 if (verify_stack_type_compatibility (ctx, old_type, new_slot)) {
4603 copy_stack_value (new_slot, old_slot);
4607 // T := S then U = T (old value is compatible with current value, use new)
4608 if (verify_stack_type_compatibility (ctx, new_type, old_slot)) {
4609 copy_stack_value (old_slot, new_slot);
4613 /*Both slots are the same boxed valuetype. Simply copy it.*/
4614 if (stack_slot_is_boxed_value (old_slot) &&
4615 stack_slot_is_boxed_value (new_slot) &&
4616 mono_metadata_type_equal (old_type, new_type)) {
4617 copy_stack_value (new_slot, old_slot);
4621 if (mono_type_is_generic_argument (old_type) || mono_type_is_generic_argument (new_type)) {
4622 char *old_name = stack_slot_full_name (old_slot);
4623 char *new_name = stack_slot_full_name (new_slot);
4624 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));
4630 //both are reference types, use closest common super type
4631 if (!mono_class_from_mono_type (old_type)->valuetype
4632 && !mono_class_from_mono_type (new_type)->valuetype
4633 && !stack_slot_is_managed_pointer (old_slot)
4634 && !stack_slot_is_managed_pointer (new_slot)) {
4636 mono_class_setup_supertypes (old_class);
4637 mono_class_setup_supertypes (new_class);
4639 for (j = MIN (old_class->idepth, new_class->idepth) - 1; j > 0; --j) {
4640 if (mono_metadata_type_equal (&old_class->supertypes [j]->byval_arg, &new_class->supertypes [j]->byval_arg)) {
4641 match_class = old_class->supertypes [j];
4646 mono_class_setup_interfaces (old_class, &error);
4647 if (!mono_error_ok (&error)) {
4648 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));
4649 mono_error_cleanup (&error);
4652 mono_class_setup_interfaces (new_class, &error);
4653 if (!mono_error_ok (&error)) {
4654 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));
4655 mono_error_cleanup (&error);
4659 /* if old class is an interface that new class implements */
4660 if (old_class->flags & TYPE_ATTRIBUTE_INTERFACE) {
4661 if (verifier_class_is_assignable_from (old_class, new_class)) {
4662 match_class = old_class;
4665 for (j = 0; j < old_class->interface_count; ++j) {
4666 if (verifier_class_is_assignable_from (old_class->interfaces [j], new_class)) {
4667 match_class = old_class->interfaces [j];
4673 if (new_class->flags & TYPE_ATTRIBUTE_INTERFACE) {
4674 if (verifier_class_is_assignable_from (new_class, old_class)) {
4675 match_class = new_class;
4678 for (j = 0; j < new_class->interface_count; ++j) {
4679 if (verifier_class_is_assignable_from (new_class->interfaces [j], old_class)) {
4680 match_class = new_class->interfaces [j];
4686 //No decent super type found, use object
4687 match_class = mono_defaults.object_class;
4689 } 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)) {
4690 match_class = mono_defaults.object_class;
4695 char *old_name = stack_slot_full_name (old_slot);
4696 char *new_name = stack_slot_full_name (new_slot);
4697 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));
4701 set_stack_value (ctx, old_slot, &new_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4705 g_assert (match_class);
4706 set_stack_value (ctx, old_slot, &match_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4707 set_stack_value (ctx, new_slot, &match_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4713 to->flags |= IL_CODE_FLAG_WAS_TARGET;
4714 to->flags |= IL_CODE_STACK_MERGED;
4717 #define HANDLER_START(clause) ((clause)->flags == MONO_EXCEPTION_CLAUSE_FILTER ? (clause)->data.filter_offset : clause->handler_offset)
4718 #define IS_CATCH_OR_FILTER(clause) ((clause)->flags == MONO_EXCEPTION_CLAUSE_FILTER || (clause)->flags == MONO_EXCEPTION_CLAUSE_NONE)
4721 * is_clause_in_range :
4723 * Returns TRUE if either the protected block or the handler of @clause is in the @start - @end range.
4726 is_clause_in_range (MonoExceptionClause *clause, guint32 start, guint32 end)
4728 if (clause->try_offset >= start && clause->try_offset < end)
4730 if (HANDLER_START (clause) >= start && HANDLER_START (clause) < end)
4736 * is_clause_inside_range :
4738 * Returns TRUE if @clause lies completely inside the @start - @end range.
4741 is_clause_inside_range (MonoExceptionClause *clause, guint32 start, guint32 end)
4743 if (clause->try_offset < start || (clause->try_offset + clause->try_len) > end)
4745 if (HANDLER_START (clause) < start || (clause->handler_offset + clause->handler_len) > end)
4751 * is_clause_nested :
4753 * Returns TRUE if @nested is nested in @clause.
4756 is_clause_nested (MonoExceptionClause *clause, MonoExceptionClause *nested)
4758 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER && is_clause_inside_range (nested, clause->data.filter_offset, clause->handler_offset))
4760 return is_clause_inside_range (nested, clause->try_offset, clause->try_offset + clause->try_len) ||
4761 is_clause_inside_range (nested, clause->handler_offset, clause->handler_offset + clause->handler_len);
4764 /* Test the relationship between 2 exception clauses. Follow P.1 12.4.2.7 of ECMA
4765 * the each pair of exception must have the following properties:
4766 * - one is fully nested on another (the outer must not be a filter clause) (the nested one must come earlier)
4767 * - completely disjoin (none of the 3 regions of each entry overlap with the other 3)
4768 * - mutual protection (protected block is EXACT the same, handlers are disjoin and all handler are catch or all handler are filter)
4771 verify_clause_relationship (VerifyContext *ctx, MonoExceptionClause *clause, MonoExceptionClause *to_test)
4773 /*clause is nested*/
4774 if (to_test->flags == MONO_EXCEPTION_CLAUSE_FILTER && is_clause_inside_range (clause, to_test->data.filter_offset, to_test->handler_offset)) {
4775 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clause inside filter"));
4779 /*wrong nesting order.*/
4780 if (is_clause_nested (clause, to_test)) {
4781 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Nested exception clause appears after enclosing clause"));
4785 /*mutual protection*/
4786 if (clause->try_offset == to_test->try_offset && clause->try_len == to_test->try_len) {
4787 /*handlers are not disjoint*/
4788 if (is_clause_in_range (to_test, HANDLER_START (clause), clause->handler_offset + clause->handler_len)) {
4789 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception handlers overlap"));
4792 /* handlers are not catch or filter */
4793 if (!IS_CATCH_OR_FILTER (clause) || !IS_CATCH_OR_FILTER (to_test)) {
4794 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clauses with shared protected block are neither catch or filter"));
4801 /*not completelly disjoint*/
4802 if ((is_clause_in_range (to_test, clause->try_offset, clause->try_offset + clause->try_len) ||
4803 is_clause_in_range (to_test, HANDLER_START (clause), clause->handler_offset + clause->handler_len)) && !is_clause_nested (to_test, clause))
4804 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clauses overlap"));
4807 #define code_bounds_check(size) \
4808 if (ADDP_IS_GREATER_OR_OVF (ip, size, end)) {\
4809 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Code overrun starting with 0x%x at 0x%04x", *ip, ctx.ip_offset)); \
4814 mono_opcode_is_prefix (int op)
4817 case MONO_CEE_UNALIGNED_:
4818 case MONO_CEE_VOLATILE_:
4819 case MONO_CEE_TAIL_:
4820 case MONO_CEE_CONSTRAINED_:
4821 case MONO_CEE_READONLY_:
4828 * FIXME: need to distinguish between valid and verifiable.
4829 * Need to keep track of types on the stack.
4830 * Verify types for opcodes.
4833 mono_method_verify (MonoMethod *method, int level)
4836 const unsigned char *ip, *code_start;
4837 const unsigned char *end;
4838 MonoSimpleBasicBlock *bb = NULL, *original_bb = NULL;
4840 int i, n, need_merge = 0, start = 0;
4841 guint ip_offset = 0, prefix = 0;
4842 MonoGenericContext *generic_context = NULL;
4846 VERIFIER_DEBUG ( printf ("Verify IL for method %s %s %s\n", method->klass->name_space, method->klass->name, method->name); );
4848 init_verifier_stats ();
4850 if (method->iflags & (METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL | METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
4851 (method->flags & (METHOD_ATTRIBUTE_PINVOKE_IMPL | METHOD_ATTRIBUTE_ABSTRACT))) {
4855 memset (&ctx, 0, sizeof (VerifyContext));
4857 //FIXME use mono_method_get_signature_full
4858 ctx.signature = mono_method_signature (method);
4859 if (!ctx.signature) {
4860 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Could not decode method signature"));
4862 finish_collect_stats ();
4865 if (!method->is_generic && !method->klass->is_generic && ctx.signature->has_type_parameters) {
4866 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Method and signature don't match in terms of genericity"));
4867 finish_collect_stats ();
4871 ctx.header = mono_method_get_header (method);
4873 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Could not decode method header"));
4874 finish_collect_stats ();
4877 ctx.method = method;
4878 code_start = ip = ctx.header->code;
4879 end = ip + ctx.header->code_size;
4880 ctx.image = image = method->klass->image;
4883 ctx.max_args = ctx.signature->param_count + ctx.signature->hasthis;
4884 ctx.max_stack = ctx.header->max_stack;
4885 ctx.verifiable = ctx.valid = 1;
4888 ctx.code = g_new (ILCodeDesc, ctx.header->code_size);
4889 ctx.code_size = ctx.header->code_size;
4890 _MEM_ALLOC (sizeof (ILCodeDesc) * ctx.header->code_size);
4892 memset(ctx.code, 0, sizeof (ILCodeDesc) * ctx.header->code_size);
4894 ctx.num_locals = ctx.header->num_locals;
4895 ctx.locals = (MonoType **)g_memdup (ctx.header->locals, sizeof (MonoType*) * ctx.header->num_locals);
4896 _MEM_ALLOC (sizeof (MonoType*) * ctx.header->num_locals);
4898 if (ctx.num_locals > 0 && !ctx.header->init_locals)
4899 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Method with locals variable but without init locals set"));
4901 ctx.params = g_new (MonoType*, ctx.max_args);
4902 _MEM_ALLOC (sizeof (MonoType*) * ctx.max_args);
4904 if (ctx.signature->hasthis)
4905 ctx.params [0] = method->klass->valuetype ? &method->klass->this_arg : &method->klass->byval_arg;
4906 memcpy (ctx.params + ctx.signature->hasthis, ctx.signature->params, sizeof (MonoType *) * ctx.signature->param_count);
4908 if (ctx.signature->is_inflated)
4909 ctx.generic_context = generic_context = mono_method_get_context (method);
4911 if (!generic_context && (method->klass->generic_container || method->is_generic)) {
4912 if (method->is_generic)
4913 ctx.generic_context = generic_context = &(mono_method_get_generic_container (method)->context);
4915 ctx.generic_context = generic_context = &method->klass->generic_container->context;
4918 for (i = 0; i < ctx.num_locals; ++i) {
4919 MonoType *uninflated = ctx.locals [i];
4920 ctx.locals [i] = mono_class_inflate_generic_type_checked (ctx.locals [i], ctx.generic_context, &error);
4921 if (!mono_error_ok (&error)) {
4922 char *name = mono_type_full_name (ctx.locals [i] ? ctx.locals [i] : uninflated);
4923 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid local %d of type %s", i, name));
4925 mono_error_cleanup (&error);
4926 /* we must not free (in cleanup) what was not yet allocated (but only copied) */
4932 for (i = 0; i < ctx.max_args; ++i) {
4933 MonoType *uninflated = ctx.params [i];
4934 ctx.params [i] = mono_class_inflate_generic_type_checked (ctx.params [i], ctx.generic_context, &error);
4935 if (!mono_error_ok (&error)) {
4936 char *name = mono_type_full_name (ctx.params [i] ? ctx.params [i] : uninflated);
4937 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid parameter %d of type %s", i, name));
4939 mono_error_cleanup (&error);
4940 /* we must not free (in cleanup) what was not yet allocated (but only copied) */
4945 stack_init (&ctx, &ctx.eval);
4947 for (i = 0; i < ctx.num_locals; ++i) {
4948 if (!mono_type_is_valid_in_context (&ctx, ctx.locals [i]))
4950 if (get_stack_type (ctx.locals [i]) == TYPE_INV) {
4951 char *name = mono_type_full_name (ctx.locals [i]);
4952 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid local %i of type %s", i, name));
4959 for (i = 0; i < ctx.max_args; ++i) {
4960 if (!mono_type_is_valid_in_context (&ctx, ctx.params [i]))
4963 if (get_stack_type (ctx.params [i]) == TYPE_INV) {
4964 char *name = mono_type_full_name (ctx.params [i]);
4965 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid parameter %i of type %s", i, name));
4974 for (i = 0; i < ctx.header->num_clauses && ctx.valid; ++i) {
4975 MonoExceptionClause *clause = ctx.header->clauses + i;
4976 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); );
4978 if (clause->try_offset > ctx.code_size || ADD_IS_GREATER_OR_OVF (clause->try_offset, clause->try_len, ctx.code_size))
4979 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try clause out of bounds at 0x%04x", clause->try_offset));
4981 if (clause->try_len <= 0)
4982 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try clause len <= 0 at 0x%04x", clause->try_offset));
4984 if (clause->handler_offset > ctx.code_size || ADD_IS_GREATER_OR_OVF (clause->handler_offset, clause->handler_len, ctx.code_size))
4985 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("handler clause out of bounds at 0x%04x", clause->try_offset));
4987 if (clause->handler_len <= 0)
4988 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("handler clause len <= 0 at 0x%04x", clause->try_offset));
4990 if (clause->try_offset < clause->handler_offset && ADD_IS_GREATER_OR_OVF (clause->try_offset, clause->try_len, HANDLER_START (clause)))
4991 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try block (at 0x%04x) includes handler block (at 0x%04x)", clause->try_offset, clause->handler_offset));
4993 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
4994 if (clause->data.filter_offset > ctx.code_size)
4995 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("filter clause out of bounds at 0x%04x", clause->try_offset));
4997 if (clause->data.filter_offset >= clause->handler_offset)
4998 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("filter clause must come before the handler clause at 0x%04x", clause->data.filter_offset));
5001 for (n = i + 1; n < ctx.header->num_clauses && ctx.valid; ++n)
5002 verify_clause_relationship (&ctx, clause, ctx.header->clauses + n);
5007 ctx.code [clause->try_offset].flags |= IL_CODE_FLAG_WAS_TARGET;
5008 if (clause->try_offset + clause->try_len < ctx.code_size)
5009 ctx.code [clause->try_offset + clause->try_len].flags |= IL_CODE_FLAG_WAS_TARGET;
5010 if (clause->handler_offset + clause->handler_len < ctx.code_size)
5011 ctx.code [clause->handler_offset + clause->handler_len].flags |= IL_CODE_FLAG_WAS_TARGET;
5013 if (clause->flags == MONO_EXCEPTION_CLAUSE_NONE) {
5014 if (!clause->data.catch_class) {
5015 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Catch clause %d with invalid type", i));
5018 if (!mono_type_is_valid_in_context (&ctx, &clause->data.catch_class->byval_arg))
5021 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->handler_offset, clause->data.catch_class);
5023 else if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
5024 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->data.filter_offset, mono_defaults.exception_class);
5025 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->handler_offset, mono_defaults.exception_class);
5032 original_bb = bb = mono_basic_block_split (method, &error);
5033 if (!mono_error_ok (&error)) {
5034 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid branch target: %s", mono_error_get_message (&error)));
5035 mono_error_cleanup (&error);
5040 while (ip < end && ctx.valid) {
5042 ip_offset = (guint) (ip - code_start);
5044 const unsigned char *ip_copy = ip;
5047 if (ip_offset > bb->end) {
5048 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or EH block at [0x%04x] targets middle instruction at 0x%04x", bb->end, ip_offset));
5052 if (ip_offset == bb->end)
5055 op_size = mono_opcode_value_and_size (&ip_copy, end, &op);
5056 if (op_size == -1) {
5057 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction %x at 0x%04x", *ip, ip_offset));
5061 if (ADD_IS_GREATER_OR_OVF (ip_offset, op_size, bb->end)) {
5062 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or EH block targets middle of instruction at 0x%04x", ip_offset));
5066 /*Last Instruction*/
5067 if (ip_offset + op_size == bb->end && mono_opcode_is_prefix (op)) {
5068 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));
5073 ctx.ip_offset = ip_offset = (guint) (ip - code_start);
5075 /*We need to check against fallthrou in and out of protected blocks.
5076 * For fallout we check the once a protected block ends, if the start flag is not set.
5077 * Likewise for fallthru in, we check if ip is the start of a protected block and start is not set
5078 * TODO convert these checks to be done using flags and not this loop
5080 for (i = 0; i < ctx.header->num_clauses && ctx.valid; ++i) {
5081 MonoExceptionClause *clause = ctx.header->clauses + i;
5083 if ((clause->try_offset + clause->try_len == ip_offset) && start == 0) {
5084 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallthru off try block at 0x%04x", ip_offset));
5088 if ((clause->handler_offset + clause->handler_len == ip_offset) && start == 0) {
5089 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER)
5090 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("fallout of handler block at 0x%04x", ip_offset));
5092 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallout of handler block at 0x%04x", ip_offset));
5096 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER && clause->handler_offset == ip_offset && start == 0) {
5097 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("fallout of filter block at 0x%04x", ip_offset));
5101 if (clause->handler_offset == ip_offset && start == 0) {
5102 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallthru handler block at 0x%04x", ip_offset));
5106 if (clause->try_offset == ip_offset && ctx.eval.size > 0 && start == 0) {
5107 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Try to enter try block with a non-empty stack at 0x%04x", ip_offset));
5112 /*This must be done after fallthru detection otherwise it won't happen.*/
5114 /*FIXME remove this once we move all bad branch checking code to use BB only*/
5115 ctx.code [ip_offset].flags |= IL_CODE_FLAG_SEEN;
5124 VERIFIER_DEBUG ( printf ("extra merge needed! 0x%04x \n", ctx.target); );
5125 merge_stacks (&ctx, &ctx.eval, &ctx.code [ctx.target], FALSE, TRUE);
5128 merge_stacks (&ctx, &ctx.eval, &ctx.code[ip_offset], start, FALSE);
5131 /*TODO we can fast detect a forward branch or exception block targeting code after prefix, we should fail fast*/
5132 #ifdef MONO_VERIFIER_DEBUG
5135 discode = mono_disasm_code_one (NULL, method, ip, NULL);
5136 discode [strlen (discode) - 1] = 0; /* no \n */
5137 g_print ("[%d] %-29s (%d)\n", ip_offset, discode, ctx.eval.size);
5140 dump_stack_state (&ctx.code [ip_offset]);
5141 dump_stack_state (&ctx.eval);
5154 push_arg (&ctx, *ip - CEE_LDARG_0, FALSE);
5160 code_bounds_check (2);
5161 push_arg (&ctx, ip [1], *ip == CEE_LDARGA_S);
5165 case CEE_ADD_OVF_UN:
5166 do_binop (&ctx, *ip, add_ovf_un_table);
5170 case CEE_SUB_OVF_UN:
5171 do_binop (&ctx, *ip, sub_ovf_un_table);
5178 case CEE_MUL_OVF_UN:
5179 do_binop (&ctx, *ip, bin_ovf_table);
5184 do_binop (&ctx, *ip, add_table);
5189 do_binop (&ctx, *ip, sub_table);
5196 do_binop (&ctx, *ip, bin_op_table);
5205 do_binop (&ctx, *ip, int_bin_op_table);
5212 do_binop (&ctx, *ip, shift_op_table);
5217 if (!check_underflow (&ctx, 1))
5219 stack_pop_safe (&ctx);
5233 /*TODO support definite assignment verification? */
5234 push_local (&ctx, *ip - CEE_LDLOC_0, FALSE);
5242 store_local (&ctx, *ip - CEE_STLOC_0);
5247 code_bounds_check (2);
5248 store_local (&ctx, ip [1]);
5253 code_bounds_check (2);
5254 store_arg (&ctx, ip [1]);
5268 if (check_overflow (&ctx))
5269 stack_push_val (&ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
5274 code_bounds_check (2);
5275 if (check_overflow (&ctx))
5276 stack_push_val (&ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
5281 code_bounds_check (5);
5282 if (check_overflow (&ctx))
5283 stack_push_val (&ctx,TYPE_I4, &mono_defaults.int32_class->byval_arg);
5288 code_bounds_check (9);
5289 if (check_overflow (&ctx))
5290 stack_push_val (&ctx,TYPE_I8, &mono_defaults.int64_class->byval_arg);
5295 code_bounds_check (5);
5296 if (check_overflow (&ctx))
5297 stack_push_val (&ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
5302 code_bounds_check (9);
5303 if (check_overflow (&ctx))
5304 stack_push_val (&ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
5309 if (check_overflow (&ctx))
5310 stack_push_val (&ctx, TYPE_COMPLEX | NULL_LITERAL_MASK, &mono_defaults.object_class->byval_arg);
5316 code_bounds_check (2);
5317 do_branch_op (&ctx, (signed char)ip [1] + 2, cmp_br_eq_op);
5330 code_bounds_check (2);
5331 do_branch_op (&ctx, (signed char)ip [1] + 2, cmp_br_op);
5338 code_bounds_check (5);
5339 do_branch_op (&ctx, (gint32)read32 (ip + 1) + 5, cmp_br_eq_op);
5352 code_bounds_check (5);
5353 do_branch_op (&ctx, (gint32)read32 (ip + 1) + 5, cmp_br_op);
5360 code_bounds_check (2);
5361 push_local (&ctx, ip[1], *ip == CEE_LDLOCA_S);
5366 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5372 if (!check_underflow (&ctx, 1))
5374 if (!check_overflow (&ctx))
5376 top = stack_push (&ctx);
5377 copy_stack_value (top, stack_peek (&ctx, 1));
5383 code_bounds_check (5);
5385 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Eval stack must be empty in jmp at 0x%04x", ip_offset));
5386 /* token = read32 (ip + 1); */
5387 if (in_any_block (ctx.header, ip_offset))
5388 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("jmp cannot escape exception blocks at 0x%04x", ip_offset));
5390 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Intruction jmp is not verifiable at 0x%04x", ctx.ip_offset));
5392 * FIXME: check signature, retval, arguments etc.
5398 code_bounds_check (5);
5399 do_invoke_method (&ctx, read32 (ip + 1), *ip == CEE_CALLVIRT);
5404 code_bounds_check (5);
5405 /* token = read32 (ip + 1); */
5407 * FIXME: check signature, retval, arguments etc.
5408 * FIXME: check requirements for tail call
5410 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Intruction calli is not verifiable at 0x%04x", ctx.ip_offset));
5414 code_bounds_check (2);
5415 do_static_branch (&ctx, (signed char)ip [1] + 2);
5423 code_bounds_check (2);
5424 do_boolean_branch_op (&ctx, (signed char)ip [1] + 2);
5430 code_bounds_check (5);
5431 do_static_branch (&ctx, (gint32)read32 (ip + 1) + 5);
5439 code_bounds_check (5);
5440 do_boolean_branch_op (&ctx, (gint32)read32 (ip + 1) + 5);
5447 code_bounds_check (5);
5448 entries = read32 (ip + 1);
5450 if (entries > 0xFFFFFFFFU / sizeof (guint32))
5451 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Too many switch entries %x at 0x%04x", entries, ctx.ip_offset));
5454 code_bounds_check (sizeof (guint32) * entries);
5456 do_switch (&ctx, entries, ip);
5457 ip += sizeof (guint32) * entries;
5471 do_load_indirect (&ctx, *ip);
5483 do_store_indirect (&ctx, *ip);
5489 do_unary_math_op (&ctx, *ip);
5499 do_conversion (&ctx, TYPE_I4);
5505 do_conversion (&ctx, TYPE_I8);
5512 do_conversion (&ctx, TYPE_R8);
5518 do_conversion (&ctx, TYPE_NATIVE_INT);
5523 code_bounds_check (5);
5524 do_cpobj (&ctx, read32 (ip + 1));
5529 code_bounds_check (5);
5530 do_ldobj_value (&ctx, read32 (ip + 1));
5535 code_bounds_check (5);
5536 do_ldstr (&ctx, read32 (ip + 1));
5541 code_bounds_check (5);
5542 do_newobj (&ctx, read32 (ip + 1));
5548 code_bounds_check (5);
5549 do_cast (&ctx, read32 (ip + 1), *ip == CEE_CASTCLASS ? "castclass" : "isinst");
5555 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5560 code_bounds_check (5);
5561 do_unbox_value (&ctx, read32 (ip + 1));
5573 code_bounds_check (5);
5574 do_push_field (&ctx, read32 (ip + 1), *ip == CEE_LDFLDA);
5580 code_bounds_check (5);
5581 do_push_static_field (&ctx, read32 (ip + 1), *ip == CEE_LDSFLDA);
5586 code_bounds_check (5);
5587 do_store_field (&ctx, read32 (ip + 1));
5592 code_bounds_check (5);
5593 do_store_static_field (&ctx, read32 (ip + 1));
5598 code_bounds_check (5);
5599 do_stobj (&ctx, read32 (ip + 1));
5603 case CEE_CONV_OVF_I1_UN:
5604 case CEE_CONV_OVF_I2_UN:
5605 case CEE_CONV_OVF_I4_UN:
5606 case CEE_CONV_OVF_U1_UN:
5607 case CEE_CONV_OVF_U2_UN:
5608 case CEE_CONV_OVF_U4_UN:
5609 do_conversion (&ctx, TYPE_I4);
5613 case CEE_CONV_OVF_I8_UN:
5614 case CEE_CONV_OVF_U8_UN:
5615 do_conversion (&ctx, TYPE_I8);
5619 case CEE_CONV_OVF_I_UN:
5620 case CEE_CONV_OVF_U_UN:
5621 do_conversion (&ctx, TYPE_NATIVE_INT);
5626 code_bounds_check (5);
5627 do_box_value (&ctx, read32 (ip + 1));
5632 code_bounds_check (5);
5633 do_newarr (&ctx, read32 (ip + 1));
5643 code_bounds_check (5);
5644 do_ldelema (&ctx, read32 (ip + 1));
5658 case CEE_LDELEM_REF:
5659 do_ldelem (&ctx, *ip, 0);
5670 case CEE_STELEM_REF:
5671 do_stelem (&ctx, *ip, 0);
5676 code_bounds_check (5);
5677 do_ldelem (&ctx, *ip, read32 (ip + 1));
5682 code_bounds_check (5);
5683 do_stelem (&ctx, *ip, read32 (ip + 1));
5688 code_bounds_check (5);
5689 do_unbox_any (&ctx, read32 (ip + 1));
5693 case CEE_CONV_OVF_I1:
5694 case CEE_CONV_OVF_U1:
5695 case CEE_CONV_OVF_I2:
5696 case CEE_CONV_OVF_U2:
5697 case CEE_CONV_OVF_I4:
5698 case CEE_CONV_OVF_U4:
5699 do_conversion (&ctx, TYPE_I4);
5703 case CEE_CONV_OVF_I8:
5704 case CEE_CONV_OVF_U8:
5705 do_conversion (&ctx, TYPE_I8);
5709 case CEE_CONV_OVF_I:
5710 case CEE_CONV_OVF_U:
5711 do_conversion (&ctx, TYPE_NATIVE_INT);
5716 code_bounds_check (5);
5717 do_refanyval (&ctx, read32 (ip + 1));
5727 code_bounds_check (5);
5728 do_mkrefany (&ctx, read32 (ip + 1));
5733 code_bounds_check (5);
5734 do_load_token (&ctx, read32 (ip + 1));
5738 case CEE_ENDFINALLY:
5739 if (!is_correct_endfinally (ctx.header, ip_offset))
5740 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("endfinally must be used inside a finally/fault handler at 0x%04x", ctx.ip_offset));
5747 code_bounds_check (5);
5748 do_leave (&ctx, read32 (ip + 1) + 5);
5755 code_bounds_check (2);
5756 do_leave (&ctx, (signed char)ip [1] + 2);
5763 code_bounds_check (2);
5767 code_bounds_check (3);
5768 store_local (&ctx, read16 (ip + 1));
5773 do_cmp_op (&ctx, cmp_br_eq_op, *ip);
5781 do_cmp_op (&ctx, cmp_br_op, *ip);
5786 code_bounds_check (3);
5787 store_arg (&ctx, read16 (ip + 1) );
5793 if (!check_overflow (&ctx))
5795 if (ctx.signature->call_convention != MONO_CALL_VARARG)
5796 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Cannot use arglist on method without VARGARG calling convention at 0x%04x", ctx.ip_offset));
5797 set_stack_value (&ctx, stack_push (&ctx), &mono_defaults.argumenthandle_class->byval_arg, FALSE);
5802 code_bounds_check (5);
5803 do_load_function_ptr (&ctx, read32 (ip + 1), FALSE);
5808 code_bounds_check (5);
5809 do_load_function_ptr (&ctx, read32 (ip + 1), TRUE);
5815 code_bounds_check (3);
5816 push_arg (&ctx, read16 (ip + 1), *ip == CEE_LDARGA);
5822 code_bounds_check (3);
5823 push_local (&ctx, read16 (ip + 1), *ip == CEE_LDLOCA);
5836 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5840 do_endfilter (&ctx);
5844 case CEE_UNALIGNED_:
5845 code_bounds_check (2);
5846 prefix |= PREFIX_UNALIGNED;
5850 prefix |= PREFIX_VOLATILE;
5854 prefix |= PREFIX_TAIL;
5856 if (ip < end && (*ip != CEE_CALL && *ip != CEE_CALLI && *ip != CEE_CALLVIRT))
5857 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("tail prefix must be used only with call opcodes at 0x%04x", ip_offset));
5861 code_bounds_check (5);
5862 do_initobj (&ctx, read32 (ip + 1));
5866 case CEE_CONSTRAINED_:
5867 code_bounds_check (5);
5868 ctx.constrained_type = get_boxable_mono_type (&ctx, read32 (ip + 1), "constrained.");
5869 prefix |= PREFIX_CONSTRAINED;
5874 prefix |= PREFIX_READONLY;
5879 CLEAR_PREFIX (&ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
5880 if (!check_underflow (&ctx, 3))
5882 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Instruction cpblk is not verifiable at 0x%04x", ctx.ip_offset));
5887 CLEAR_PREFIX (&ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
5888 if (!check_underflow (&ctx, 3))
5890 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Instruction initblk is not verifiable at 0x%04x", ctx.ip_offset));
5898 if (!is_correct_rethrow (ctx.header, ip_offset))
5899 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("rethrow must be used inside a catch handler at 0x%04x", ctx.ip_offset));
5906 code_bounds_check (5);
5907 do_sizeof (&ctx, read32 (ip + 1));
5911 case CEE_REFANYTYPE:
5912 do_refanytype (&ctx);
5917 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction FE %x at 0x%04x", *ip, ctx.ip_offset));
5923 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction %x at 0x%04x", *ip, ctx.ip_offset));
5927 /*TODO we can fast detect a forward branch or exception block targeting code after prefix, we should fail fast*/
5929 if (!ctx.prefix_set) //first prefix
5930 ctx.code [ctx.ip_offset].flags |= IL_CODE_FLAG_SEEN;
5931 ctx.prefix_set |= prefix;
5932 ctx.has_flags = TRUE;
5936 ctx.code [ctx.ip_offset].flags |= IL_CODE_FLAG_SEEN;
5938 if (ctx.prefix_set & PREFIX_CONSTRAINED)
5939 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after constrained prefix at 0x%04x", ctx.ip_offset));
5940 if (ctx.prefix_set & PREFIX_READONLY)
5941 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after readonly prefix at 0x%04x", ctx.ip_offset));
5942 if (ctx.prefix_set & PREFIX_VOLATILE)
5943 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after volatile prefix at 0x%04x", ctx.ip_offset));
5944 if (ctx.prefix_set & PREFIX_UNALIGNED)
5945 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after unaligned prefix at 0x%04x", ctx.ip_offset));
5946 ctx.prefix_set = prefix = 0;
5947 ctx.has_flags = FALSE;
5951 * if ip != end we overflowed: mark as error.
5953 if ((ip != end || !start) && ctx.verifiable && !ctx.list) {
5954 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Run ahead of method code at 0x%04x", ip_offset));
5957 /*We should guard against the last decoded opcode, otherwise we might add errors that doesn't make sense.*/
5958 for (i = 0; i < ctx.code_size && i < ip_offset; ++i) {
5959 if (ctx.code [i].flags & IL_CODE_FLAG_WAS_TARGET) {
5960 if (!(ctx.code [i].flags & IL_CODE_FLAG_SEEN))
5961 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or exception block target middle of intruction at 0x%04x", i));
5963 if (ctx.code [i].flags & IL_CODE_DELEGATE_SEQUENCE)
5964 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Branch to delegate code sequence at 0x%04x", i));
5966 if ((ctx.code [i].flags & IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL) && ctx.has_this_store)
5967 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Invalid ldftn with virtual function in method with stdarg 0 at 0x%04x", i));
5969 if ((ctx.code [i].flags & IL_CODE_CALL_NONFINAL_VIRTUAL) && ctx.has_this_store)
5970 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));
5973 if (mono_method_is_constructor (ctx.method) && !ctx.super_ctor_called && !ctx.method->klass->valuetype && ctx.method->klass != mono_defaults.object_class) {
5974 char *method_name = mono_method_full_name (ctx.method, TRUE);
5975 char *type = mono_type_get_full_name (ctx.method->klass);
5976 if (ctx.method->klass->parent && ctx.method->klass->parent->exception_type != MONO_EXCEPTION_NONE)
5977 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));
5979 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Constructor %s for type %s not calling base type ctor.", method_name, type));
5980 g_free (method_name);
5986 for (i = 0; i < ctx.header->code_size; ++i) {
5987 if (ctx.code [i].stack)
5988 g_free (ctx.code [i].stack);
5992 for (tmp = ctx.funptrs; tmp; tmp = tmp->next)
5994 g_slist_free (ctx.funptrs);
5996 for (tmp = ctx.exception_types; tmp; tmp = tmp->next)
5997 mono_metadata_free_type ((MonoType *)tmp->data);
5998 g_slist_free (ctx.exception_types);
6000 for (i = 0; i < ctx.num_locals; ++i) {
6002 mono_metadata_free_type (ctx.locals [i]);
6004 for (i = 0; i < ctx.max_args; ++i) {
6006 mono_metadata_free_type (ctx.params [i]);
6010 g_free (ctx.eval.stack);
6013 g_free (ctx.locals);
6014 g_free (ctx.params);
6015 mono_basic_block_free (original_bb);
6016 mono_metadata_free_mh (ctx.header);
6018 finish_collect_stats ();
6023 mono_verify_corlib ()
6025 /* This is a public API function so cannot be removed */
6030 * mono_verifier_is_enabled_for_method:
6031 * @method: the method to probe
6033 * Returns TRUE if @method needs to be verified.
6037 mono_verifier_is_enabled_for_method (MonoMethod *method)
6039 return mono_verifier_is_enabled_for_class (method->klass) && (method->wrapper_type == MONO_WRAPPER_NONE || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD);
6043 * mono_verifier_is_enabled_for_class:
6044 * @klass: The `MonoClass` to probe
6046 * Returns TRUE if @klass need to be verified.
6050 mono_verifier_is_enabled_for_class (MonoClass *klass)
6052 return verify_all || (verifier_mode > MONO_VERIFIER_MODE_OFF && !(klass->image->assembly && klass->image->assembly->in_gac) && klass->image != mono_defaults.corlib);
6056 mono_verifier_is_enabled_for_image (MonoImage *image)
6058 return verify_all || verifier_mode > MONO_VERIFIER_MODE_OFF;
6062 * Dynamic methods are not considered full trust since if the user is trusted and need to
6063 * generate unsafe code, make the method skip verification - this is a known good way to do it.
6066 mono_verifier_is_method_full_trust (MonoMethod *method)
6068 return mono_verifier_is_class_full_trust (method->klass) && !method_is_dynamic (method);
6072 * Returns if @klass is under full trust or not.
6074 * TODO This code doesn't take CAS into account.
6076 * Under verify_all all user code must be verifiable if no security option was set
6080 mono_verifier_is_class_full_trust (MonoClass *klass)
6082 /* under CoreCLR code is trusted if it is part of the "platform" otherwise all code inside the GAC is trusted */
6083 gboolean trusted_location = !mono_security_core_clr_enabled () ?
6084 (klass->image->assembly && klass->image->assembly->in_gac) : mono_security_core_clr_is_platform_image (klass->image);
6086 if (verify_all && verifier_mode == MONO_VERIFIER_MODE_OFF)
6087 return trusted_location || klass->image == mono_defaults.corlib;
6088 return verifier_mode < MONO_VERIFIER_MODE_VERIFIABLE || trusted_location || klass->image == mono_defaults.corlib;
6092 mono_method_verify_with_current_settings (MonoMethod *method, gboolean skip_visibility, gboolean is_fulltrust)
6094 return mono_method_verify (method,
6095 (verifier_mode != MONO_VERIFIER_MODE_STRICT ? MONO_VERIFY_NON_STRICT: 0)
6096 | (!is_fulltrust && !mono_verifier_is_method_full_trust (method) ? MONO_VERIFY_FAIL_FAST : 0)
6097 | (skip_visibility ? MONO_VERIFY_SKIP_VISIBILITY : 0));
6101 get_field_end (MonoClassField *field)
6104 int size = mono_type_size (field->type, &align);
6106 size = 4; /*FIXME Is this a safe bet?*/
6107 return size + field->offset;
6111 verify_class_for_overlapping_reference_fields (MonoClass *klass)
6114 gpointer iter = NULL;
6115 MonoClassField *field;
6116 gboolean is_fulltrust = mono_verifier_is_class_full_trust (klass);
6117 /*We can't skip types with !has_references since this is calculated after we have run.*/
6118 if (!((klass->flags & TYPE_ATTRIBUTE_LAYOUT_MASK) == TYPE_ATTRIBUTE_EXPLICIT_LAYOUT))
6122 /*We must check for stuff overlapping reference fields.
6123 The outer loop uses mono_class_get_fields to ensure that MonoClass:fields get inited.
6125 while ((field = mono_class_get_fields (klass, &iter))) {
6126 int fieldEnd = get_field_end (field);
6127 gboolean is_valuetype = !MONO_TYPE_IS_REFERENCE (field->type);
6130 if (mono_field_is_deleted (field) || (field->type->attrs & FIELD_ATTRIBUTE_STATIC))
6133 for (j = i; j < klass->field.count; ++j) {
6134 MonoClassField *other = &klass->fields [j];
6135 int otherEnd = get_field_end (other);
6136 if (mono_field_is_deleted (other) || (is_valuetype && !MONO_TYPE_IS_REFERENCE (other->type)) || (other->type->attrs & FIELD_ATTRIBUTE_STATIC))
6139 if (!is_valuetype && MONO_TYPE_IS_REFERENCE (other->type) && field->offset == other->offset && is_fulltrust)
6142 if ((otherEnd > field->offset && otherEnd <= fieldEnd) || (other->offset >= field->offset && other->offset < fieldEnd))
6150 field_hash (gconstpointer key)
6152 const MonoClassField *field = (const MonoClassField *)key;
6153 return g_str_hash (field->name) ^ mono_metadata_type_hash (field->type); /**/
6157 field_equals (gconstpointer _a, gconstpointer _b)
6159 const MonoClassField *a = (const MonoClassField *)_a;
6160 const MonoClassField *b = (const MonoClassField *)_b;
6161 return !strcmp (a->name, b->name) && mono_metadata_type_equal (a->type, b->type);
6166 verify_class_fields (MonoClass *klass)
6168 gpointer iter = NULL;
6169 MonoClassField *field;
6170 MonoGenericContext *context = mono_class_get_context (klass);
6171 GHashTable *unique_fields = g_hash_table_new_full (&field_hash, &field_equals, NULL, NULL);
6172 if (klass->generic_container)
6173 context = &klass->generic_container->context;
6175 while ((field = mono_class_get_fields (klass, &iter)) != NULL) {
6176 if (!mono_type_is_valid_type_in_context (field->type, context)) {
6177 g_hash_table_destroy (unique_fields);
6180 if (g_hash_table_lookup (unique_fields, field)) {
6181 g_hash_table_destroy (unique_fields);
6184 g_hash_table_insert (unique_fields, field, field);
6186 g_hash_table_destroy (unique_fields);
6191 verify_interfaces (MonoClass *klass)
6194 for (i = 0; i < klass->interface_count; ++i) {
6195 MonoClass *iface = klass->interfaces [i];
6196 if (!(iface->flags & TYPE_ATTRIBUTE_INTERFACE))
6203 verify_valuetype_layout_with_target (MonoClass *klass, MonoClass *target_class)
6206 gpointer iter = NULL;
6207 MonoClassField *field;
6208 MonoClass *field_class;
6210 if (!klass->valuetype)
6213 type = klass->byval_arg.type;
6214 /*primitive type fields are not properly decoded*/
6215 if ((type >= MONO_TYPE_BOOLEAN && type <= MONO_TYPE_R8) || (type >= MONO_TYPE_I && type <= MONO_TYPE_U))
6218 while ((field = mono_class_get_fields (klass, &iter)) != NULL) {
6222 if (field->type->attrs & (FIELD_ATTRIBUTE_STATIC | FIELD_ATTRIBUTE_HAS_FIELD_RVA))
6225 field_class = mono_class_get_generic_type_definition (mono_class_from_mono_type (field->type));
6227 if (field_class == target_class || klass == field_class || !verify_valuetype_layout_with_target (field_class, target_class))
6235 verify_valuetype_layout (MonoClass *klass)
6238 res = verify_valuetype_layout_with_target (klass, klass);
6243 recursive_mark_constraint_args (MonoBitSet *used_args, MonoGenericContainer *gc, MonoType *type)
6246 MonoClass **constraints;
6247 MonoGenericParamInfo *param_info;
6249 g_assert (mono_type_is_generic_argument (type));
6251 idx = mono_type_get_generic_param_num (type);
6252 if (mono_bitset_test_fast (used_args, idx))
6255 mono_bitset_set_fast (used_args, idx);
6256 param_info = mono_generic_container_get_param_info (gc, idx);
6258 if (!param_info->constraints)
6261 for (constraints = param_info->constraints; *constraints; ++constraints) {
6262 MonoClass *ctr = *constraints;
6263 MonoType *constraint_type = &ctr->byval_arg;
6265 if (mono_type_is_generic_argument (constraint_type) && !recursive_mark_constraint_args (used_args, gc, constraint_type))
6272 verify_generic_parameters (MonoClass *klass)
6275 MonoGenericContainer *gc = klass->generic_container;
6276 MonoBitSet *used_args = mono_bitset_new (gc->type_argc, 0);
6278 for (i = 0; i < gc->type_argc; ++i) {
6279 MonoGenericParamInfo *param_info = mono_generic_container_get_param_info (gc, i);
6280 MonoClass **constraints;
6282 if (!param_info->constraints)
6285 mono_bitset_clear_all (used_args);
6286 mono_bitset_set_fast (used_args, i);
6288 for (constraints = param_info->constraints; *constraints; ++constraints) {
6289 MonoClass *ctr = *constraints;
6290 MonoType *constraint_type = &ctr->byval_arg;
6292 if (!mono_class_can_access_class (klass, ctr))
6295 if (!mono_type_is_valid_type_in_context (constraint_type, &gc->context))
6298 if (mono_type_is_generic_argument (constraint_type) && !recursive_mark_constraint_args (used_args, gc, constraint_type))
6300 if (ctr->generic_class && !mono_class_is_valid_generic_instantiation (NULL, ctr))
6304 mono_bitset_free (used_args);
6308 mono_bitset_free (used_args);
6313 * Check if the class is verifiable.
6315 * Right now there are no conditions that make a class a valid but not verifiable. Both overlapping reference
6316 * field and invalid generic instantiation are fatal errors.
6318 * This method must be safe to be called from mono_class_init and all code must be carefull about that.
6322 mono_verifier_verify_class (MonoClass *klass)
6324 /*Neither <Module>, object or ifaces have parent.*/
6325 if (!klass->parent &&
6326 klass != mono_defaults.object_class &&
6327 !MONO_CLASS_IS_INTERFACE (klass) &&
6328 (!image_is_dynamic (klass->image) && klass->type_token != 0x2000001)) /*<Module> is the first type in the assembly*/
6330 if (klass->parent) {
6331 if (MONO_CLASS_IS_INTERFACE (klass->parent))
6333 if (!klass->generic_class && klass->parent->generic_container)
6335 if (klass->parent->generic_class && !klass->generic_class) {
6336 MonoGenericContext *context = mono_class_get_context (klass);
6337 if (klass->generic_container)
6338 context = &klass->generic_container->context;
6339 if (!mono_type_is_valid_type_in_context (&klass->parent->byval_arg, context))
6343 if (klass->generic_container && (klass->flags & TYPE_ATTRIBUTE_LAYOUT_MASK) == TYPE_ATTRIBUTE_EXPLICIT_LAYOUT)
6345 if (klass->generic_container && !verify_generic_parameters (klass))
6347 if (!verify_class_for_overlapping_reference_fields (klass))
6349 if (klass->generic_class && !mono_class_is_valid_generic_instantiation (NULL, klass))
6351 if (klass->generic_class == NULL && !verify_class_fields (klass))
6353 if (klass->valuetype && !verify_valuetype_layout (klass))
6355 if (!verify_interfaces (klass))
6361 mono_verifier_class_is_valid_generic_instantiation (MonoClass *klass)
6363 return mono_class_is_valid_generic_instantiation (NULL, klass);
6367 mono_verifier_is_method_valid_generic_instantiation (MonoMethod *method)
6369 if (!method->is_inflated)
6371 return mono_method_is_valid_generic_instantiation (NULL, method);
6377 mono_verifier_verify_class (MonoClass *klass)
6379 /* The verifier was disabled at compile time */
6384 mono_method_verify_with_current_settings (MonoMethod *method, gboolean skip_visibility, gboolean is_fulltrust)
6386 /* The verifier was disabled at compile time */
6391 mono_verifier_is_class_full_trust (MonoClass *klass)
6393 /* The verifier was disabled at compile time */
6398 mono_verifier_is_method_full_trust (MonoMethod *method)
6400 /* The verifier was disabled at compile time */
6405 mono_verifier_is_enabled_for_image (MonoImage *image)
6407 /* The verifier was disabled at compile time */
6412 mono_verifier_is_enabled_for_class (MonoClass *klass)
6414 /* The verifier was disabled at compile time */
6419 mono_verifier_is_enabled_for_method (MonoMethod *method)
6421 /* The verifier was disabled at compile time */
6426 mono_method_verify (MonoMethod *method, int level)
6428 /* The verifier was disabled at compile time */
6433 mono_free_verify_list (GSList *list)
6435 /* The verifier was disabled at compile time */
6436 /* will always be null if verifier is disabled */
6440 mono_verifier_class_is_valid_generic_instantiation (MonoClass *klass)
6446 mono_verifier_is_method_valid_generic_instantiation (MonoMethod *method)