5 * Mono Project (http://www.mono-project.com)
7 * Copyright 2001-2003 Ximian, Inc (http://www.ximian.com)
8 * Copyright 2004-2009 Novell, Inc (http://www.novell.com)
9 * Copyright 2011 Rodrigo Kumpera
10 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
14 #include <mono/metadata/object-internals.h>
15 #include <mono/metadata/verify.h>
16 #include <mono/metadata/verify-internals.h>
17 #include <mono/metadata/opcodes.h>
18 #include <mono/metadata/tabledefs.h>
19 #include <mono/metadata/reflection.h>
20 #include <mono/metadata/debug-helpers.h>
21 #include <mono/metadata/mono-endian.h>
22 #include <mono/metadata/metadata.h>
23 #include <mono/metadata/metadata-internals.h>
24 #include <mono/metadata/class-internals.h>
25 #include <mono/metadata/security-manager.h>
26 #include <mono/metadata/security-core-clr.h>
27 #include <mono/metadata/tokentype.h>
28 #include <mono/metadata/mono-basic-block.h>
29 #include <mono/metadata/attrdefs.h>
30 #include <mono/metadata/class-internals.h>
31 #include <mono/utils/mono-counters.h>
32 #include <mono/utils/monobitset.h>
36 static MiniVerifierMode verifier_mode = MONO_VERIFIER_MODE_OFF;
37 static gboolean verify_all = FALSE;
40 * Set the desired level of checks for the verfier.
44 mono_verifier_set_mode (MiniVerifierMode mode)
50 mono_verifier_enable_verify_all ()
55 #ifndef DISABLE_VERIFIER
57 * Pull the list of opcodes
59 #define OPDEF(a,b,c,d,e,f,g,h,i,j) \
63 #include "mono/cil/opcode.def"
68 #ifdef MONO_VERIFIER_DEBUG
69 #define VERIFIER_DEBUG(code) do { code } while (0)
71 #define VERIFIER_DEBUG(code)
74 //////////////////////////////////////////////////////////////////
75 #define IS_STRICT_MODE(ctx) (((ctx)->level & MONO_VERIFY_NON_STRICT) == 0)
76 #define IS_FAIL_FAST_MODE(ctx) (((ctx)->level & MONO_VERIFY_FAIL_FAST) == MONO_VERIFY_FAIL_FAST)
77 #define IS_SKIP_VISIBILITY(ctx) (((ctx)->level & MONO_VERIFY_SKIP_VISIBILITY) == MONO_VERIFY_SKIP_VISIBILITY)
78 #define IS_REPORT_ALL_ERRORS(ctx) (((ctx)->level & MONO_VERIFY_REPORT_ALL_ERRORS) == MONO_VERIFY_REPORT_ALL_ERRORS)
79 #define CLEAR_PREFIX(ctx, prefix) do { (ctx)->prefix_set &= ~(prefix); } while (0)
80 #define ADD_VERIFY_INFO(__ctx, __msg, __status, __exception) \
82 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
83 vinfo->info.status = __status; \
84 vinfo->info.message = ( __msg ); \
85 vinfo->exception_type = (__exception); \
86 (__ctx)->list = g_slist_prepend ((__ctx)->list, vinfo); \
89 //TODO support MONO_VERIFY_REPORT_ALL_ERRORS
90 #define ADD_VERIFY_ERROR(__ctx, __msg) \
92 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_ERROR, MONO_EXCEPTION_INVALID_PROGRAM); \
96 #define CODE_NOT_VERIFIABLE(__ctx, __msg) \
98 if ((__ctx)->verifiable || IS_REPORT_ALL_ERRORS (__ctx)) { \
99 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_NOT_VERIFIABLE, MONO_EXCEPTION_UNVERIFIABLE_IL); \
100 (__ctx)->verifiable = 0; \
101 if (IS_FAIL_FAST_MODE (__ctx)) \
102 (__ctx)->valid = 0; \
106 #define ADD_VERIFY_ERROR2(__ctx, __msg, __exception) \
108 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_ERROR, __exception); \
109 (__ctx)->valid = 0; \
112 #define CODE_NOT_VERIFIABLE2(__ctx, __msg, __exception) \
114 if ((__ctx)->verifiable || IS_REPORT_ALL_ERRORS (__ctx)) { \
115 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_NOT_VERIFIABLE, __exception); \
116 (__ctx)->verifiable = 0; \
117 if (IS_FAIL_FAST_MODE (__ctx)) \
118 (__ctx)->valid = 0; \
122 #define CHECK_ADD4_OVERFLOW_UN(a, b) ((guint32)(0xFFFFFFFFU) - (guint32)(b) < (guint32)(a))
123 #define CHECK_ADD8_OVERFLOW_UN(a, b) ((guint64)(0xFFFFFFFFFFFFFFFFUL) - (guint64)(b) < (guint64)(a))
125 #if SIZEOF_VOID_P == 4
126 #define CHECK_ADDP_OVERFLOW_UN(a,b) CHECK_ADD4_OVERFLOW_UN(a, b)
128 #define CHECK_ADDP_OVERFLOW_UN(a,b) CHECK_ADD8_OVERFLOW_UN(a, b)
131 #define ADDP_IS_GREATER_OR_OVF(a, b, c) (((a) + (b) > (c)) || CHECK_ADDP_OVERFLOW_UN (a, b))
132 #define ADD_IS_GREATER_OR_OVF(a, b, c) (((a) + (b) > (c)) || CHECK_ADD4_OVERFLOW_UN (a, b))
134 /*Flags to be used with ILCodeDesc::flags */
136 /*Instruction has not been processed.*/
137 IL_CODE_FLAG_NOT_PROCESSED = 0,
138 /*Instruction was decoded by mono_method_verify loop.*/
139 IL_CODE_FLAG_SEEN = 1,
140 /*Instruction was target of a branch or is at a protected block boundary.*/
141 IL_CODE_FLAG_WAS_TARGET = 2,
142 /*Used by stack_init to avoid double initialize each entry.*/
143 IL_CODE_FLAG_STACK_INITED = 4,
144 /*Used by merge_stacks to decide if it should just copy the eval stack.*/
145 IL_CODE_STACK_MERGED = 8,
146 /*This instruction is part of the delegate construction sequence, it cannot be target of a branch.*/
147 IL_CODE_DELEGATE_SEQUENCE = 0x10,
148 /*This is a delegate created from a ldftn to a non final virtual method*/
149 IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL = 0x20,
150 /*This is a call to a non final virtual method*/
151 IL_CODE_CALL_NONFINAL_VIRTUAL = 0x40,
169 guint16 size, max_size;
186 /*Allocated fnptr MonoType that should be freed by us.*/
188 /*Type dup'ed exception types from catch blocks.*/
189 GSList *exception_types;
194 /*TODO get rid of target here, need_merge in mono_method_verify and hoist the merging code in the branching code*/
198 MonoMethodSignature *signature;
199 MonoMethodHeader *header;
201 MonoGenericContext *generic_context;
205 /*This flag helps solving a corner case of delegate verification in that you cannot have a "starg 0"
206 *on a method that creates a delegate for a non-final virtual method using ldftn*/
207 gboolean has_this_store;
209 /*This flag is used to control if the contructor of the parent class has been called.
210 *If the this pointer is pushed on the eval stack and it's a reference type constructor and
211 * super_ctor_called is false, the uninitialized flag is set on the pushed value.
213 * Poping an uninitialized this ptr from the eval stack is an unverifiable operation unless
214 * the safe variant is used. Only a few opcodes can use it : dup, pop, ldfld, stfld and call to a constructor.
216 gboolean super_ctor_called;
220 MonoType *constrained_type;
224 merge_stacks (VerifyContext *ctx, ILCodeDesc *from, ILCodeDesc *to, gboolean start, gboolean external);
227 get_stack_type (MonoType *type);
230 mono_delegate_signature_equal (MonoMethodSignature *delegate_sig, MonoMethodSignature *method_sig, gboolean is_static_ldftn);
233 mono_class_is_valid_generic_instantiation (VerifyContext *ctx, MonoClass *klass);
236 mono_method_is_valid_generic_instantiation (VerifyContext *ctx, MonoMethod *method);
238 static MonoGenericParam*
239 verifier_get_generic_param_from_type (VerifyContext *ctx, MonoType *type);
242 verifier_class_is_assignable_from (MonoClass *target, MonoClass *candidate);
243 //////////////////////////////////////////////////////////////////
248 TYPE_INV = 0, /* leave at 0. */
253 /* Used by operator tables to resolve pointer types (managed & unmanaged) and by unmanaged pointer types*/
255 /* value types and classes */
257 /* Number of types, used to define the size of the tables*/
260 /* Used by tables to signal that a result is not verifiable*/
261 NON_VERIFIABLE_RESULT = 0x80,
263 /*Mask used to extract just the type, excluding flags */
266 /* The stack type is a managed pointer, unmask the value to res */
267 POINTER_MASK = 0x100,
269 /*Stack type with the pointer mask*/
270 RAW_TYPE_MASK = 0x10F,
272 /* Controlled Mutability Manager Pointer */
275 /* The stack type is a null literal*/
276 NULL_LITERAL_MASK = 0x400,
278 /**Used by ldarg.0 and family to let delegate verification happens.*/
279 THIS_POINTER_MASK = 0x800,
281 /**Signals that this is a boxed value type*/
284 /*This is an unitialized this ref*/
285 UNINIT_THIS_MASK = 0x2000,
288 static const char* const
289 type_names [TYPE_MAX + 1] = {
300 PREFIX_UNALIGNED = 1,
303 PREFIX_CONSTRAINED = 8,
306 //////////////////////////////////////////////////////////////////
308 #ifdef ENABLE_VERIFIER_STATS
310 #define _MEM_ALLOC(amt) do { allocated_memory += (amt); working_set += (amt); } while (0)
311 #define _MEM_FREE(amt) do { working_set -= (amt); } while (0)
313 static int allocated_memory;
314 static int working_set;
315 static int max_allocated_memory;
316 static int max_working_set;
317 static int total_allocated_memory;
320 finish_collect_stats (void)
322 max_allocated_memory = MAX (max_allocated_memory, allocated_memory);
323 max_working_set = MAX (max_working_set, working_set);
324 total_allocated_memory += allocated_memory;
325 allocated_memory = working_set = 0;
329 init_verifier_stats (void)
331 static gboolean inited;
334 mono_counters_register ("Maximum memory allocated during verification", MONO_COUNTER_METADATA | MONO_COUNTER_INT, &max_allocated_memory);
335 mono_counters_register ("Maximum memory used during verification", MONO_COUNTER_METADATA | MONO_COUNTER_INT, &max_working_set);
336 mono_counters_register ("Total memory allocated for verification", MONO_COUNTER_METADATA | MONO_COUNTER_INT, &total_allocated_memory);
342 #define _MEM_ALLOC(amt) do {} while (0)
343 #define _MEM_FREE(amt) do { } while (0)
345 #define finish_collect_stats()
346 #define init_verifier_stats()
351 //////////////////////////////////////////////////////////////////
354 /*Token validation macros and functions */
355 #define IS_MEMBER_REF(token) (mono_metadata_token_table (token) == MONO_TABLE_MEMBERREF)
356 #define IS_METHOD_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
357 #define IS_METHOD_SPEC(token) (mono_metadata_token_table (token) == MONO_TABLE_METHODSPEC)
358 #define IS_FIELD_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_FIELD)
360 #define IS_TYPE_REF(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPEREF)
361 #define IS_TYPE_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPEDEF)
362 #define IS_TYPE_SPEC(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPESPEC)
363 #define IS_METHOD_DEF_OR_REF_OR_SPEC(token) (IS_METHOD_DEF (token) || IS_MEMBER_REF (token) || IS_METHOD_SPEC (token))
364 #define IS_TYPE_DEF_OR_REF_OR_SPEC(token) (IS_TYPE_DEF (token) || IS_TYPE_REF (token) || IS_TYPE_SPEC (token))
365 #define IS_FIELD_DEF_OR_REF(token) (IS_FIELD_DEF (token) || IS_MEMBER_REF (token))
368 * Verify if @token refers to a valid row on int's table.
371 token_bounds_check (MonoImage *image, guint32 token)
373 if (image_is_dynamic (image))
374 return mono_reflection_is_valid_dynamic_token ((MonoDynamicImage*)image, token);
375 return image->tables [mono_metadata_token_table (token)].rows >= mono_metadata_token_index (token) && mono_metadata_token_index (token) > 0;
379 mono_type_create_fnptr_from_mono_method (VerifyContext *ctx, MonoMethod *method)
381 MonoType *res = g_new0 (MonoType, 1);
382 _MEM_ALLOC (sizeof (MonoType));
384 //FIXME use mono_method_get_signature_full
385 res->data.method = mono_method_signature (method);
386 res->type = MONO_TYPE_FNPTR;
387 ctx->funptrs = g_slist_prepend (ctx->funptrs, res);
392 * mono_type_is_enum_type:
394 * Returns: TRUE if @type is an enum type.
397 mono_type_is_enum_type (MonoType *type)
399 if (type->type == MONO_TYPE_VALUETYPE && type->data.klass->enumtype)
401 if (type->type == MONO_TYPE_GENERICINST && type->data.generic_class->container_class->enumtype)
407 * mono_type_is_value_type:
409 * Returns: TRUE if @type is named after @namespace.@name.
413 mono_type_is_value_type (MonoType *type, const char *namespace_, const char *name)
415 return type->type == MONO_TYPE_VALUETYPE &&
416 !strcmp (namespace_, type->data.klass->name_space) &&
417 !strcmp (name, type->data.klass->name);
421 * Returns TURE if @type is VAR or MVAR
424 mono_type_is_generic_argument (MonoType *type)
426 return type->type == MONO_TYPE_VAR || type->type == MONO_TYPE_MVAR;
430 * mono_type_get_underlying_type_any:
432 * This functions is just like mono_type_get_underlying_type but it doesn't care if the type is byref.
434 * Returns the underlying type of @type regardless if it is byref or not.
437 mono_type_get_underlying_type_any (MonoType *type)
439 if (type->type == MONO_TYPE_VALUETYPE && type->data.klass->enumtype)
440 return mono_class_enum_basetype (type->data.klass);
441 if (type->type == MONO_TYPE_GENERICINST && type->data.generic_class->container_class->enumtype)
442 return mono_class_enum_basetype (type->data.generic_class->container_class);
446 static G_GNUC_UNUSED const char*
447 mono_type_get_stack_name (MonoType *type)
449 return type_names [get_stack_type (type) & TYPE_MASK];
452 #define CTOR_REQUIRED_FLAGS (METHOD_ATTRIBUTE_SPECIAL_NAME | METHOD_ATTRIBUTE_RT_SPECIAL_NAME)
453 #define CTOR_INVALID_FLAGS (METHOD_ATTRIBUTE_STATIC)
456 mono_method_is_constructor (MonoMethod *method)
458 return ((method->flags & CTOR_REQUIRED_FLAGS) == CTOR_REQUIRED_FLAGS &&
459 !(method->flags & CTOR_INVALID_FLAGS) &&
460 !strcmp (".ctor", method->name));
464 mono_class_has_default_constructor (MonoClass *klass)
469 mono_class_setup_methods (klass);
470 if (mono_class_has_failure (klass))
473 for (i = 0; i < klass->method.count; ++i) {
474 method = klass->methods [i];
475 if (mono_method_is_constructor (method) &&
476 mono_method_signature (method) &&
477 mono_method_signature (method)->param_count == 0 &&
478 (method->flags & METHOD_ATTRIBUTE_MEMBER_ACCESS_MASK) == METHOD_ATTRIBUTE_PUBLIC)
485 * Verify if @type is valid for the given @ctx verification context.
486 * this function checks for VAR and MVAR types that are invalid under the current verifier,
489 mono_type_is_valid_type_in_context_full (MonoType *type, MonoGenericContext *context, gboolean check_gtd)
492 MonoGenericInst *inst;
494 switch (type->type) {
499 inst = type->type == MONO_TYPE_VAR ? context->class_inst : context->method_inst;
500 if (!inst || mono_type_get_generic_param_num (type) >= inst->type_argc)
503 case MONO_TYPE_SZARRAY:
504 return mono_type_is_valid_type_in_context_full (&type->data.klass->byval_arg, context, check_gtd);
505 case MONO_TYPE_ARRAY:
506 return mono_type_is_valid_type_in_context_full (&type->data.array->eklass->byval_arg, context, check_gtd);
508 return mono_type_is_valid_type_in_context_full (type->data.type, context, check_gtd);
509 case MONO_TYPE_GENERICINST:
510 inst = type->data.generic_class->context.class_inst;
513 for (i = 0; i < inst->type_argc; ++i)
514 if (!mono_type_is_valid_type_in_context_full (inst->type_argv [i], context, check_gtd))
517 case MONO_TYPE_CLASS:
518 case MONO_TYPE_VALUETYPE: {
519 MonoClass *klass = type->data.klass;
521 * It's possible to encode generic'sh types in such a way that they disguise themselves as class or valuetype.
522 * Fixing the type decoding is really tricky since under some cases this behavior is needed, for example, to
523 * have a 'class' type pointing to a 'genericinst' class.
525 * For the runtime these non canonical (weird) encodings work fine, the worst they can cause is some
526 * reflection oddities which are harmless - to security at least.
528 if (klass->byval_arg.type != type->type)
529 return mono_type_is_valid_type_in_context_full (&klass->byval_arg, context, check_gtd);
531 if (check_gtd && klass->generic_container)
542 mono_type_is_valid_type_in_context (MonoType *type, MonoGenericContext *context)
544 return mono_type_is_valid_type_in_context_full (type, context, FALSE);
547 /*This function returns NULL if the type is not instantiatable*/
549 verifier_inflate_type (VerifyContext *ctx, MonoType *type, MonoGenericContext *context)
554 result = mono_class_inflate_generic_type_checked (type, context, &error);
555 if (!mono_error_ok (&error)) {
556 mono_error_cleanup (&error);
562 /*A side note here. We don't need to check if arguments are broken since this
563 is only need to be done by the runtime before realizing the type.
566 is_valid_generic_instantiation (MonoGenericContainer *gc, MonoGenericContext *context, MonoGenericInst *ginst)
571 if (ginst->type_argc != gc->type_argc)
574 for (i = 0; i < gc->type_argc; ++i) {
575 MonoGenericParamInfo *param_info = mono_generic_container_get_param_info (gc, i);
576 MonoClass *paramClass;
577 MonoClass **constraints;
578 MonoType *param_type = ginst->type_argv [i];
580 /*it's not our job to validate type variables*/
581 if (mono_type_is_generic_argument (param_type))
584 paramClass = mono_class_from_mono_type (param_type);
587 /* A GTD can't be a generic argument.
589 * Due to how types are encoded we must check for the case of a genericinst MonoType and GTD MonoClass.
590 * This happens in cases such as: class Foo<T> { void X() { new Bar<T> (); } }
592 * Open instantiations can have GTDs as this happens when one type is instantiated with others params
593 * and the former has an expansion into the later. For example:
595 * class A<T>: B<K> {}
596 * The type A <K> has a parent B<K>, that is inflated into the GTD B<>.
597 * Since A<K> is open, thus not instantiatable, this is valid.
599 if (paramClass->generic_container && param_type->type != MONO_TYPE_GENERICINST && !ginst->is_open)
602 /*it's not safe to call mono_class_init from here*/
603 if (paramClass->generic_class && !paramClass->inited) {
604 if (!mono_class_is_valid_generic_instantiation (NULL, paramClass))
608 if (!param_info->constraints && !(param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK))
611 if ((param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT) && (!paramClass->valuetype || mono_class_is_nullable (paramClass)))
614 if ((param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_REFERENCE_TYPE_CONSTRAINT) && paramClass->valuetype)
617 if ((param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_CONSTRUCTOR_CONSTRAINT) && !paramClass->valuetype && !mono_class_has_default_constructor (paramClass))
620 if (!param_info->constraints)
623 for (constraints = param_info->constraints; *constraints; ++constraints) {
624 MonoClass *ctr = *constraints;
627 inflated = mono_class_inflate_generic_type_checked (&ctr->byval_arg, context, &error);
628 if (!mono_error_ok (&error)) {
629 mono_error_cleanup (&error);
632 ctr = mono_class_from_mono_type (inflated);
633 mono_metadata_free_type (inflated);
635 /*FIXME maybe we need the same this as verifier_class_is_assignable_from*/
636 if (!mono_class_is_assignable_from_slow (ctr, paramClass))
644 * mono_generic_param_is_constraint_compatible:
646 * Returns: TRUE if @candidate is constraint compatible with @target.
648 * This means that @candidate constraints are a super set of @target constaints
651 mono_generic_param_is_constraint_compatible (VerifyContext *ctx, MonoGenericParam *target, MonoGenericParam *candidate, MonoClass *candidate_param_class, MonoGenericContext *context)
653 MonoGenericParamInfo *tinfo = mono_generic_param_info (target);
654 MonoGenericParamInfo *cinfo = mono_generic_param_info (candidate);
655 MonoClass **candidate_class;
656 gboolean class_constraint_satisfied = FALSE;
657 gboolean valuetype_constraint_satisfied = FALSE;
659 int tmask = tinfo->flags & GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK;
660 int cmask = cinfo->flags & GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK;
662 if (cinfo->constraints) {
663 for (candidate_class = cinfo->constraints; *candidate_class; ++candidate_class) {
665 MonoType *inflated = verifier_inflate_type (ctx, &(*candidate_class)->byval_arg, ctx->generic_context);
668 cc = mono_class_from_mono_type (inflated);
669 mono_metadata_free_type (inflated);
671 if (mono_type_is_reference (&cc->byval_arg) && !MONO_CLASS_IS_INTERFACE (cc))
672 class_constraint_satisfied = TRUE;
673 else if (!mono_type_is_reference (&cc->byval_arg) && !MONO_CLASS_IS_INTERFACE (cc))
674 valuetype_constraint_satisfied = TRUE;
677 class_constraint_satisfied |= (cmask & GENERIC_PARAMETER_ATTRIBUTE_REFERENCE_TYPE_CONSTRAINT) != 0;
678 valuetype_constraint_satisfied |= (cmask & GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT) != 0;
680 if ((tmask & GENERIC_PARAMETER_ATTRIBUTE_REFERENCE_TYPE_CONSTRAINT) && !class_constraint_satisfied)
682 if ((tmask & GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT) && !valuetype_constraint_satisfied)
684 if ((tmask & GENERIC_PARAMETER_ATTRIBUTE_CONSTRUCTOR_CONSTRAINT) && !((cmask & GENERIC_PARAMETER_ATTRIBUTE_CONSTRUCTOR_CONSTRAINT) ||
685 valuetype_constraint_satisfied)) {
690 if (tinfo->constraints) {
691 MonoClass **target_class;
692 for (target_class = tinfo->constraints; *target_class; ++target_class) {
694 MonoType *inflated = verifier_inflate_type (ctx, &(*target_class)->byval_arg, context);
697 tc = mono_class_from_mono_type (inflated);
698 mono_metadata_free_type (inflated);
701 * A constraint from @target might inflate into @candidate itself and in that case we don't need
702 * check it's constraints since it satisfy the constraint by itself.
704 if (mono_metadata_type_equal (&tc->byval_arg, &candidate_param_class->byval_arg))
707 if (!cinfo->constraints)
710 for (candidate_class = cinfo->constraints; *candidate_class; ++candidate_class) {
712 inflated = verifier_inflate_type (ctx, &(*candidate_class)->byval_arg, ctx->generic_context);
715 cc = mono_class_from_mono_type (inflated);
716 mono_metadata_free_type (inflated);
718 if (verifier_class_is_assignable_from (tc, cc))
722 * This happens when we have the following:
724 * Bar<K> where K : IFace
725 * Foo<T, U> where T : U where U : IFace
727 * Bar<T> <- T here satisfy K constraint transitively through to U's constraint
730 if (mono_type_is_generic_argument (&cc->byval_arg)) {
731 MonoGenericParam *other_candidate = verifier_get_generic_param_from_type (ctx, &cc->byval_arg);
733 if (mono_generic_param_is_constraint_compatible (ctx, target, other_candidate, cc, context)) {
738 if (!*candidate_class)
745 static MonoGenericParam*
746 verifier_get_generic_param_from_type (VerifyContext *ctx, MonoType *type)
748 MonoGenericContainer *gc;
749 MonoMethod *method = ctx->method;
752 num = mono_type_get_generic_param_num (type);
754 if (type->type == MONO_TYPE_VAR) {
755 MonoClass *gtd = method->klass;
756 if (gtd->generic_class)
757 gtd = gtd->generic_class->container_class;
758 gc = gtd->generic_container;
760 MonoMethod *gmd = method;
761 if (method->is_inflated)
762 gmd = ((MonoMethodInflated*)method)->declaring;
763 gc = mono_method_get_generic_container (gmd);
767 return mono_generic_container_get_param (gc, num);
773 * Verify if @type is valid for the given @ctx verification context.
774 * this function checks for VAR and MVAR types that are invalid under the current verifier,
775 * This means that it either
778 is_valid_type_in_context (VerifyContext *ctx, MonoType *type)
780 return mono_type_is_valid_type_in_context (type, ctx->generic_context);
784 is_valid_generic_instantiation_in_context (VerifyContext *ctx, MonoGenericInst *ginst, gboolean check_gtd)
787 for (i = 0; i < ginst->type_argc; ++i) {
788 MonoType *type = ginst->type_argv [i];
790 if (!mono_type_is_valid_type_in_context_full (type, ctx->generic_context, TRUE))
797 generic_arguments_respect_constraints (VerifyContext *ctx, MonoGenericContainer *gc, MonoGenericContext *context, MonoGenericInst *ginst)
800 for (i = 0; i < ginst->type_argc; ++i) {
801 MonoType *type = ginst->type_argv [i];
802 MonoGenericParam *target = mono_generic_container_get_param (gc, i);
803 MonoGenericParam *candidate;
804 MonoClass *candidate_class;
806 if (!mono_type_is_generic_argument (type))
809 if (!is_valid_type_in_context (ctx, type))
812 candidate = verifier_get_generic_param_from_type (ctx, type);
813 candidate_class = mono_class_from_mono_type (type);
815 if (!mono_generic_param_is_constraint_compatible (ctx, target, candidate, candidate_class, context))
822 mono_method_repect_method_constraints (VerifyContext *ctx, MonoMethod *method)
824 MonoMethodInflated *gmethod = (MonoMethodInflated *)method;
825 MonoGenericInst *ginst = gmethod->context.method_inst;
826 MonoGenericContainer *gc = mono_method_get_generic_container (gmethod->declaring);
827 return !gc || generic_arguments_respect_constraints (ctx, gc, &gmethod->context, ginst);
831 mono_class_repect_method_constraints (VerifyContext *ctx, MonoClass *klass)
833 MonoGenericClass *gklass = klass->generic_class;
834 MonoGenericInst *ginst = gklass->context.class_inst;
835 MonoGenericContainer *gc = gklass->container_class->generic_container;
836 return !gc || generic_arguments_respect_constraints (ctx, gc, &gklass->context, ginst);
840 mono_method_is_valid_generic_instantiation (VerifyContext *ctx, MonoMethod *method)
842 MonoMethodInflated *gmethod = (MonoMethodInflated *)method;
843 MonoGenericInst *ginst = gmethod->context.method_inst;
844 MonoGenericContainer *gc = mono_method_get_generic_container (gmethod->declaring);
845 if (!gc) /*non-generic inflated method - it's part of a generic type */
847 if (ctx && !is_valid_generic_instantiation_in_context (ctx, ginst, TRUE))
849 return is_valid_generic_instantiation (gc, &gmethod->context, ginst);
854 mono_class_is_valid_generic_instantiation (VerifyContext *ctx, MonoClass *klass)
856 MonoGenericClass *gklass = klass->generic_class;
857 MonoGenericInst *ginst = gklass->context.class_inst;
858 MonoGenericContainer *gc = gklass->container_class->generic_container;
859 if (ctx && !is_valid_generic_instantiation_in_context (ctx, ginst, TRUE))
861 return is_valid_generic_instantiation (gc, &gklass->context, ginst);
865 mono_type_is_valid_in_context (VerifyContext *ctx, MonoType *type)
870 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid null type at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
874 if (!is_valid_type_in_context (ctx, type)) {
875 char *str = mono_type_full_name (type);
876 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid generic type (%s%s) (argument out of range or %s is not generic) at 0x%04x",
877 str [0] == '!' ? "" : type->type == MONO_TYPE_VAR ? "!" : "!!",
879 type->type == MONO_TYPE_VAR ? "class" : "method",
881 MONO_EXCEPTION_BAD_IMAGE);
886 klass = mono_class_from_mono_type (type);
887 mono_class_init (klass);
888 if (mono_class_has_failure (klass)) {
889 if (klass->generic_class && !mono_class_is_valid_generic_instantiation (NULL, klass))
890 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);
892 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);
896 if (klass->generic_class && mono_class_has_failure (klass->generic_class->container_class)) {
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 */
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);
1028 if (!mono_type_is_valid_in_context (ctx, type))
1035 /* stack_slot_get_type:
1037 * Returns the stack type of @value. This value includes POINTER_MASK.
1039 * Use this function to checks that account for a managed pointer.
1042 stack_slot_get_type (ILStackDesc *value)
1044 return value->stype & RAW_TYPE_MASK;
1047 /* stack_slot_get_underlying_type:
1049 * Returns the stack type of @value. This value does not include POINTER_MASK.
1051 * Use this function is cases where the fact that the value could be a managed pointer is
1052 * irrelevant. For example, field load doesn't care about this fact of type on stack.
1055 stack_slot_get_underlying_type (ILStackDesc *value)
1057 return value->stype & TYPE_MASK;
1060 /* stack_slot_is_managed_pointer:
1062 * Returns TRUE is @value is a managed pointer.
1065 stack_slot_is_managed_pointer (ILStackDesc *value)
1067 return (value->stype & POINTER_MASK) == POINTER_MASK;
1070 /* stack_slot_is_managed_mutability_pointer:
1072 * Returns TRUE is @value is a managed mutability pointer.
1074 static G_GNUC_UNUSED gboolean
1075 stack_slot_is_managed_mutability_pointer (ILStackDesc *value)
1077 return (value->stype & CMMP_MASK) == CMMP_MASK;
1080 /* stack_slot_is_null_literal:
1082 * Returns TRUE is @value is the null literal.
1085 stack_slot_is_null_literal (ILStackDesc *value)
1087 return (value->stype & NULL_LITERAL_MASK) == NULL_LITERAL_MASK;
1091 /* stack_slot_is_this_pointer:
1093 * Returns TRUE is @value is the this literal
1096 stack_slot_is_this_pointer (ILStackDesc *value)
1098 return (value->stype & THIS_POINTER_MASK) == THIS_POINTER_MASK;
1101 /* stack_slot_is_boxed_value:
1103 * Returns TRUE is @value is a boxed value
1106 stack_slot_is_boxed_value (ILStackDesc *value)
1108 return (value->stype & BOXED_MASK) == BOXED_MASK;
1112 stack_slot_get_name (ILStackDesc *value)
1114 return type_names [value->stype & TYPE_MASK];
1117 #define APPEND_WITH_PREDICATE(PRED,NAME) do {\
1118 if (PRED (value)) { \
1120 g_string_append (str, ", "); \
1121 g_string_append (str, NAME); \
1126 stack_slot_stack_type_full_name (ILStackDesc *value)
1128 GString *str = g_string_new ("");
1130 gboolean has_pred = FALSE, first = TRUE;
1132 if ((value->stype & TYPE_MASK) != value->stype) {
1133 g_string_append(str, "[");
1134 APPEND_WITH_PREDICATE (stack_slot_is_this_pointer, "this");
1135 APPEND_WITH_PREDICATE (stack_slot_is_boxed_value, "boxed");
1136 APPEND_WITH_PREDICATE (stack_slot_is_null_literal, "null");
1137 APPEND_WITH_PREDICATE (stack_slot_is_managed_mutability_pointer, "cmmp");
1138 APPEND_WITH_PREDICATE (stack_slot_is_managed_pointer, "mp");
1142 if (mono_type_is_generic_argument (value->type) && !stack_slot_is_boxed_value (value)) {
1144 g_string_append(str, "[");
1146 g_string_append (str, ", ");
1147 g_string_append (str, "unboxed");
1152 g_string_append(str, "] ");
1154 g_string_append (str, stack_slot_get_name (value));
1156 g_string_free (str, FALSE);
1161 stack_slot_full_name (ILStackDesc *value)
1163 char *type_name = mono_type_full_name (value->type);
1164 char *stack_name = stack_slot_stack_type_full_name (value);
1165 char *res = g_strdup_printf ("%s (%s)", type_name, stack_name);
1167 g_free (stack_name);
1171 //////////////////////////////////////////////////////////////////
1173 mono_free_verify_list (GSList *list)
1175 MonoVerifyInfoExtended *info;
1178 for (tmp = list; tmp; tmp = tmp->next) {
1179 info = (MonoVerifyInfoExtended *)tmp->data;
1180 g_free (info->info.message);
1183 g_slist_free (list);
1186 #define ADD_ERROR(list,msg) \
1188 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1189 vinfo->info.status = MONO_VERIFY_ERROR; \
1190 vinfo->info.message = (msg); \
1191 (list) = g_slist_prepend ((list), vinfo); \
1194 #define ADD_WARN(list,code,msg) \
1196 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1197 vinfo->info.status = (code); \
1198 vinfo->info.message = (msg); \
1199 (list) = g_slist_prepend ((list), vinfo); \
1202 #define ADD_INVALID(list,msg) \
1204 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1205 vinfo->status = MONO_VERIFY_ERROR; \
1206 vinfo->message = (msg); \
1207 (list) = g_slist_prepend ((list), vinfo); \
1208 /*G_BREAKPOINT ();*/ \
1212 #define CHECK_STACK_UNDERFLOW(num) \
1214 if (cur_stack < (num)) \
1215 ADD_INVALID (list, g_strdup_printf ("Stack underflow at 0x%04x (%d items instead of %d)", ip_offset, cur_stack, (num))); \
1218 #define CHECK_STACK_OVERFLOW() \
1220 if (cur_stack >= max_stack) \
1221 ADD_INVALID (list, g_strdup_printf ("Maxstack exceeded at 0x%04x", ip_offset)); \
1226 in_any_block (MonoMethodHeader *header, guint offset)
1229 MonoExceptionClause *clause;
1231 for (i = 0; i < header->num_clauses; ++i) {
1232 clause = &header->clauses [i];
1233 if (MONO_OFFSET_IN_CLAUSE (clause, offset))
1235 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1237 if (MONO_OFFSET_IN_FILTER (clause, offset))
1244 * in_any_exception_block:
1246 * Returns TRUE is @offset is part of any exception clause (filter, handler, catch, finally or fault).
1249 in_any_exception_block (MonoMethodHeader *header, guint offset)
1252 MonoExceptionClause *clause;
1254 for (i = 0; i < header->num_clauses; ++i) {
1255 clause = &header->clauses [i];
1256 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1258 if (MONO_OFFSET_IN_FILTER (clause, offset))
1265 * is_valid_branch_instruction:
1267 * Verify if it's valid to perform a branch from @offset to @target.
1268 * This should be used with br and brtrue/false.
1269 * It returns 0 if valid, 1 for unverifiable and 2 for invalid.
1270 * The major difference from other similiar functions is that branching into a
1271 * finally/fault block is invalid instead of just unverifiable.
1274 is_valid_branch_instruction (MonoMethodHeader *header, guint offset, guint target)
1277 MonoExceptionClause *clause;
1279 for (i = 0; i < header->num_clauses; ++i) {
1280 clause = &header->clauses [i];
1281 /*branching into a finally block is invalid*/
1282 if ((clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY || clause->flags == MONO_EXCEPTION_CLAUSE_FAULT) &&
1283 !MONO_OFFSET_IN_HANDLER (clause, offset) &&
1284 MONO_OFFSET_IN_HANDLER (clause, target))
1287 if (clause->try_offset != target && (MONO_OFFSET_IN_CLAUSE (clause, offset) ^ MONO_OFFSET_IN_CLAUSE (clause, target)))
1289 if (MONO_OFFSET_IN_HANDLER (clause, offset) ^ MONO_OFFSET_IN_HANDLER (clause, target))
1291 if (MONO_OFFSET_IN_FILTER (clause, offset) ^ MONO_OFFSET_IN_FILTER (clause, target))
1298 * is_valid_cmp_branch_instruction:
1300 * Verify if it's valid to perform a branch from @offset to @target.
1301 * This should be used with binary comparison branching instruction, like beq, bge and similars.
1302 * It returns 0 if valid, 1 for unverifiable and 2 for invalid.
1304 * The major differences from other similar functions are that most errors lead to invalid
1305 * code and only branching out of finally, filter or fault clauses is unverifiable.
1308 is_valid_cmp_branch_instruction (MonoMethodHeader *header, guint offset, guint target)
1311 MonoExceptionClause *clause;
1313 for (i = 0; i < header->num_clauses; ++i) {
1314 clause = &header->clauses [i];
1315 /*branching out of a handler or finally*/
1316 if (clause->flags != MONO_EXCEPTION_CLAUSE_NONE &&
1317 MONO_OFFSET_IN_HANDLER (clause, offset) &&
1318 !MONO_OFFSET_IN_HANDLER (clause, target))
1321 if (clause->try_offset != target && (MONO_OFFSET_IN_CLAUSE (clause, offset) ^ MONO_OFFSET_IN_CLAUSE (clause, target)))
1323 if (MONO_OFFSET_IN_HANDLER (clause, offset) ^ MONO_OFFSET_IN_HANDLER (clause, target))
1325 if (MONO_OFFSET_IN_FILTER (clause, offset) ^ MONO_OFFSET_IN_FILTER (clause, target))
1332 * A leave can't escape a finally block
1335 is_correct_leave (MonoMethodHeader *header, guint offset, guint target)
1338 MonoExceptionClause *clause;
1340 for (i = 0; i < header->num_clauses; ++i) {
1341 clause = &header->clauses [i];
1342 if (clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY && MONO_OFFSET_IN_HANDLER (clause, offset) && !MONO_OFFSET_IN_HANDLER (clause, target))
1344 if (MONO_OFFSET_IN_FILTER (clause, offset))
1351 * A rethrow can't happen outside of a catch handler.
1354 is_correct_rethrow (MonoMethodHeader *header, guint offset)
1357 MonoExceptionClause *clause;
1359 for (i = 0; i < header->num_clauses; ++i) {
1360 clause = &header->clauses [i];
1361 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1368 * An endfinally can't happen outside of a finally/fault handler.
1371 is_correct_endfinally (MonoMethodHeader *header, guint offset)
1374 MonoExceptionClause *clause;
1376 for (i = 0; i < header->num_clauses; ++i) {
1377 clause = &header->clauses [i];
1378 if (MONO_OFFSET_IN_HANDLER (clause, offset) && (clause->flags == MONO_EXCEPTION_CLAUSE_FAULT || clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY))
1386 * An endfilter can only happens inside a filter clause.
1387 * In non-strict mode filter is allowed inside the handler clause too
1389 static MonoExceptionClause *
1390 is_correct_endfilter (VerifyContext *ctx, guint offset)
1393 MonoExceptionClause *clause;
1395 for (i = 0; i < ctx->header->num_clauses; ++i) {
1396 clause = &ctx->header->clauses [i];
1397 if (clause->flags != MONO_EXCEPTION_CLAUSE_FILTER)
1399 if (MONO_OFFSET_IN_FILTER (clause, offset))
1401 if (!IS_STRICT_MODE (ctx) && MONO_OFFSET_IN_HANDLER (clause, offset))
1409 * Non-strict endfilter can happens inside a try block or any handler block
1412 is_unverifiable_endfilter (VerifyContext *ctx, guint offset)
1415 MonoExceptionClause *clause;
1417 for (i = 0; i < ctx->header->num_clauses; ++i) {
1418 clause = &ctx->header->clauses [i];
1419 if (MONO_OFFSET_IN_CLAUSE (clause, offset))
1426 is_valid_bool_arg (ILStackDesc *arg)
1428 if (stack_slot_is_managed_pointer (arg) || stack_slot_is_boxed_value (arg) || stack_slot_is_null_literal (arg))
1432 switch (stack_slot_get_underlying_type (arg)) {
1435 case TYPE_NATIVE_INT:
1439 g_assert (arg->type);
1440 switch (arg->type->type) {
1441 case MONO_TYPE_CLASS:
1442 case MONO_TYPE_STRING:
1443 case MONO_TYPE_OBJECT:
1444 case MONO_TYPE_SZARRAY:
1445 case MONO_TYPE_ARRAY:
1446 case MONO_TYPE_FNPTR:
1449 case MONO_TYPE_GENERICINST:
1450 /*We need to check if the container class
1451 * of the generic type is a valuetype, iow:
1452 * is it a "class Foo<T>" or a "struct Foo<T>"?
1454 return !arg->type->data.generic_class->container_class->valuetype;
1464 /*Type manipulation helper*/
1466 /*Returns the byref version of the supplied MonoType*/
1468 mono_type_get_type_byref (MonoType *type)
1472 return &mono_class_from_mono_type (type)->this_arg;
1476 /*Returns the byval version of the supplied MonoType*/
1478 mono_type_get_type_byval (MonoType *type)
1482 return &mono_class_from_mono_type (type)->byval_arg;
1486 mono_type_from_stack_slot (ILStackDesc *slot)
1488 if (stack_slot_is_managed_pointer (slot))
1489 return mono_type_get_type_byref (slot->type);
1493 /*Stack manipulation code*/
1496 ensure_stack_size (ILCodeDesc *stack, int required)
1501 if (required < stack->max_size)
1504 /* We don't have to worry about the exponential growth since stack_copy prune unused space */
1505 new_size = MAX (8, MAX (required, stack->max_size * 2));
1507 g_assert (new_size >= stack->size);
1508 g_assert (new_size >= required);
1510 tmp = g_new0 (ILStackDesc, new_size);
1511 _MEM_ALLOC (sizeof (ILStackDesc) * new_size);
1515 memcpy (tmp, stack->stack, stack->size * sizeof (ILStackDesc));
1516 g_free (stack->stack);
1517 _MEM_FREE (sizeof (ILStackDesc) * stack->max_size);
1521 stack->max_size = new_size;
1525 stack_init (VerifyContext *ctx, ILCodeDesc *state)
1527 if (state->flags & IL_CODE_FLAG_STACK_INITED)
1529 state->size = state->max_size = 0;
1530 state->flags |= IL_CODE_FLAG_STACK_INITED;
1534 stack_copy (ILCodeDesc *to, ILCodeDesc *from)
1536 ensure_stack_size (to, from->size);
1537 to->size = from->size;
1539 /*stack copy happens at merge points, which have small stacks*/
1541 memcpy (to->stack, from->stack, sizeof (ILStackDesc) * from->size);
1545 copy_stack_value (ILStackDesc *to, ILStackDesc *from)
1547 to->stype = from->stype;
1548 to->type = from->type;
1549 to->method = from->method;
1553 check_underflow (VerifyContext *ctx, int size)
1555 if (ctx->eval.size < size) {
1556 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack underflow, required %d, but have %d at 0x%04x", size, ctx->eval.size, ctx->ip_offset));
1563 check_overflow (VerifyContext *ctx)
1565 if (ctx->eval.size >= ctx->max_stack) {
1566 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have stack-depth %d at 0x%04x", ctx->eval.size + 1, ctx->ip_offset));
1572 /*This reject out PTR, FNPTR and TYPEDBYREF*/
1574 check_unmanaged_pointer (VerifyContext *ctx, ILStackDesc *value)
1576 if (stack_slot_get_type (value) == TYPE_PTR) {
1577 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unmanaged pointer is not a verifiable type at 0x%04x", ctx->ip_offset));
1583 /*TODO verify if MONO_TYPE_TYPEDBYREF is not allowed here as well.*/
1585 check_unverifiable_type (VerifyContext *ctx, MonoType *type)
1587 if (type->type == MONO_TYPE_PTR || type->type == MONO_TYPE_FNPTR) {
1588 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unmanaged pointer is not a verifiable type at 0x%04x", ctx->ip_offset));
1594 static ILStackDesc *
1595 stack_push (VerifyContext *ctx)
1597 g_assert (ctx->eval.size < ctx->max_stack);
1598 g_assert (ctx->eval.size <= ctx->eval.max_size);
1600 ensure_stack_size (&ctx->eval, ctx->eval.size + 1);
1602 return & ctx->eval.stack [ctx->eval.size++];
1605 static ILStackDesc *
1606 stack_push_val (VerifyContext *ctx, int stype, MonoType *type)
1608 ILStackDesc *top = stack_push (ctx);
1614 static ILStackDesc *
1615 stack_pop (VerifyContext *ctx)
1618 g_assert (ctx->eval.size > 0);
1619 ret = ctx->eval.stack + --ctx->eval.size;
1620 if ((ret->stype & UNINIT_THIS_MASK) == UNINIT_THIS_MASK)
1621 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Found use of uninitialized 'this ptr' ref at 0x%04x", ctx->ip_offset));
1625 /* This function allows to safely pop an unititialized this ptr from
1626 * the eval stack without marking the method as unverifiable.
1628 static ILStackDesc *
1629 stack_pop_safe (VerifyContext *ctx)
1631 g_assert (ctx->eval.size > 0);
1632 return ctx->eval.stack + --ctx->eval.size;
1635 /*Positive number distance from stack top. [0] is stack top, [1] is the one below*/
1637 stack_peek (VerifyContext *ctx, int distance)
1639 g_assert (ctx->eval.size - distance > 0);
1640 return ctx->eval.stack + (ctx->eval.size - 1 - distance);
1643 static ILStackDesc *
1644 stack_push_stack_val (VerifyContext *ctx, ILStackDesc *value)
1646 ILStackDesc *top = stack_push (ctx);
1647 copy_stack_value (top, value);
1651 /* Returns the MonoType associated with the token, or NULL if it is invalid.
1653 * A boxable type can be either a reference or value type, but cannot be a byref type or an unmanaged pointer
1656 get_boxable_mono_type (VerifyContext* ctx, int token, const char *opcode)
1661 if (!(type = verifier_load_type (ctx, token, opcode)))
1664 if (type->byref && type->type != MONO_TYPE_TYPEDBYREF) {
1665 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of byref type for %s at 0x%04x", opcode, ctx->ip_offset));
1669 if (type->type == MONO_TYPE_VOID) {
1670 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of void type for %s at 0x%04x", opcode, ctx->ip_offset));
1674 if (type->type == MONO_TYPE_TYPEDBYREF)
1675 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid use of typedbyref for %s at 0x%04x", opcode, ctx->ip_offset));
1677 if (!(klass = mono_class_from_mono_type (type)))
1678 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Could not retrieve type token for %s at 0x%04x", opcode, ctx->ip_offset));
1680 if (klass->generic_container && type->type != MONO_TYPE_GENERICINST)
1681 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));
1683 check_unverifiable_type (ctx, type);
1688 /*operation result tables */
1690 static const unsigned char bin_op_table [TYPE_MAX][TYPE_MAX] = {
1691 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1692 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1693 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1694 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
1695 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1696 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1699 static const unsigned char add_table [TYPE_MAX][TYPE_MAX] = {
1700 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1701 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1702 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1703 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
1704 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_INV, TYPE_INV},
1705 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1708 static const unsigned char sub_table [TYPE_MAX][TYPE_MAX] = {
1709 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1710 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1711 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1712 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
1713 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_NATIVE_INT | NON_VERIFIABLE_RESULT, TYPE_INV},
1714 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1717 static const unsigned char int_bin_op_table [TYPE_MAX][TYPE_MAX] = {
1718 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1719 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1720 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1721 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1722 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1723 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1726 static const unsigned char shift_op_table [TYPE_MAX][TYPE_MAX] = {
1727 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1728 {TYPE_I8, TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV},
1729 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1730 {TYPE_INV, TYPE_INV, TYPE_INV, 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},
1735 static const unsigned char cmp_br_op [TYPE_MAX][TYPE_MAX] = {
1736 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1737 {TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1738 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1739 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV},
1740 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV},
1741 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1744 static const unsigned char cmp_br_eq_op [TYPE_MAX][TYPE_MAX] = {
1745 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
1746 {TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1747 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_I4 | NON_VERIFIABLE_RESULT, TYPE_INV},
1748 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV},
1749 {TYPE_INV, TYPE_INV, TYPE_I4 | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_I4, TYPE_INV},
1750 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4},
1753 static const unsigned char add_ovf_un_table [TYPE_MAX][TYPE_MAX] = {
1754 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1755 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1756 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
1757 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1758 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_INV, TYPE_INV},
1759 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1762 static const unsigned char sub_ovf_un_table [TYPE_MAX][TYPE_MAX] = {
1763 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1764 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1765 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1766 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1767 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_NATIVE_INT | NON_VERIFIABLE_RESULT, TYPE_INV},
1768 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1771 static const unsigned char bin_ovf_table [TYPE_MAX][TYPE_MAX] = {
1772 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1773 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
1774 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
1775 {TYPE_INV, TYPE_INV, TYPE_INV, 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},
1780 #ifdef MONO_VERIFIER_DEBUG
1784 dump_stack_value (ILStackDesc *value)
1786 printf ("[(%x)(%x)", value->type->type, value->stype);
1788 if (stack_slot_is_this_pointer (value))
1791 if (stack_slot_is_boxed_value (value))
1792 printf ("[boxed] ");
1794 if (stack_slot_is_null_literal (value))
1797 if (stack_slot_is_managed_mutability_pointer (value))
1798 printf ("Controled Mutability MP: ");
1800 if (stack_slot_is_managed_pointer (value))
1801 printf ("Managed Pointer to: ");
1803 switch (stack_slot_get_underlying_type (value)) {
1805 printf ("invalid type]");
1813 case TYPE_NATIVE_INT:
1814 printf ("native int]");
1817 printf ("float64]");
1820 printf ("unmanaged pointer]");
1823 switch (value->type->type) {
1824 case MONO_TYPE_CLASS:
1825 case MONO_TYPE_VALUETYPE:
1826 printf ("complex] (%s)", value->type->data.klass->name);
1828 case MONO_TYPE_STRING:
1829 printf ("complex] (string)");
1831 case MONO_TYPE_OBJECT:
1832 printf ("complex] (object)");
1834 case MONO_TYPE_SZARRAY:
1835 printf ("complex] (%s [])", value->type->data.klass->name);
1837 case MONO_TYPE_ARRAY:
1838 printf ("complex] (%s [%d %d %d])",
1839 value->type->data.array->eklass->name,
1840 value->type->data.array->rank,
1841 value->type->data.array->numsizes,
1842 value->type->data.array->numlobounds);
1844 case MONO_TYPE_GENERICINST:
1845 printf ("complex] (inst of %s )", value->type->data.generic_class->container_class->name);
1848 printf ("complex] (type generic param !%d - %s) ", value->type->data.generic_param->num, mono_generic_param_info (value->type->data.generic_param)->name);
1850 case MONO_TYPE_MVAR:
1851 printf ("complex] (method generic param !!%d - %s) ", value->type->data.generic_param->num, mono_generic_param_info (value->type->data.generic_param)->name);
1854 //should be a boxed value
1855 char * name = mono_type_full_name (value->type);
1856 printf ("complex] %s", name);
1862 printf ("unknown stack %x type]\n", value->stype);
1863 g_assert_not_reached ();
1868 dump_stack_state (ILCodeDesc *state)
1872 printf ("(%d) ", state->size);
1873 for (i = 0; i < state->size; ++i)
1874 dump_stack_value (state->stack + i);
1880 * is_array_type_compatible:
1882 * Returns TRUE if candidate array type can be assigned to target.
1884 * Both parameters MUST be of type MONO_TYPE_ARRAY (target->type == MONO_TYPE_ARRAY)
1887 is_array_type_compatible (MonoType *target, MonoType *candidate)
1889 MonoArrayType *left = target->data.array;
1890 MonoArrayType *right = candidate->data.array;
1892 g_assert (target->type == MONO_TYPE_ARRAY);
1893 g_assert (candidate->type == MONO_TYPE_ARRAY);
1895 if (left->rank != right->rank)
1898 return verifier_class_is_assignable_from (left->eklass, right->eklass);
1902 get_stack_type (MonoType *type)
1905 int type_kind = type->type;
1907 mask = POINTER_MASK;
1908 /*TODO handle CMMP_MASK */
1911 switch (type_kind) {
1914 case MONO_TYPE_BOOLEAN:
1917 case MONO_TYPE_CHAR:
1920 return TYPE_I4 | mask;
1924 return TYPE_NATIVE_INT | mask;
1926 /* FIXME: the spec says that you cannot have a pointer to method pointer, do we need to check this here? */
1927 case MONO_TYPE_FNPTR:
1929 case MONO_TYPE_TYPEDBYREF:
1930 return TYPE_PTR | mask;
1933 case MONO_TYPE_MVAR:
1935 case MONO_TYPE_CLASS:
1936 case MONO_TYPE_STRING:
1937 case MONO_TYPE_OBJECT:
1938 case MONO_TYPE_SZARRAY:
1939 case MONO_TYPE_ARRAY:
1940 return TYPE_COMPLEX | mask;
1944 return TYPE_I8 | mask;
1948 return TYPE_R8 | mask;
1950 case MONO_TYPE_GENERICINST:
1951 case MONO_TYPE_VALUETYPE:
1952 if (mono_type_is_enum_type (type)) {
1953 type = mono_type_get_underlying_type_any (type);
1956 type_kind = type->type;
1959 return TYPE_COMPLEX | mask;
1967 /* convert MonoType to ILStackDesc format (stype) */
1969 set_stack_value (VerifyContext *ctx, ILStackDesc *stack, MonoType *type, int take_addr)
1972 int type_kind = type->type;
1974 if (type->byref || take_addr)
1975 mask = POINTER_MASK;
1976 /* TODO handle CMMP_MASK */
1981 switch (type_kind) {
1984 case MONO_TYPE_BOOLEAN:
1987 case MONO_TYPE_CHAR:
1990 stack->stype = TYPE_I4 | mask;
1994 stack->stype = TYPE_NATIVE_INT | mask;
1997 /*FIXME: Do we need to check if it's a pointer to the method pointer? The spec says it' illegal to have that.*/
1998 case MONO_TYPE_FNPTR:
2000 case MONO_TYPE_TYPEDBYREF:
2001 stack->stype = TYPE_PTR | mask;
2004 case MONO_TYPE_CLASS:
2005 case MONO_TYPE_STRING:
2006 case MONO_TYPE_OBJECT:
2007 case MONO_TYPE_SZARRAY:
2008 case MONO_TYPE_ARRAY:
2011 case MONO_TYPE_MVAR:
2012 stack->stype = TYPE_COMPLEX | mask;
2017 stack->stype = TYPE_I8 | mask;
2021 stack->stype = TYPE_R8 | mask;
2023 case MONO_TYPE_GENERICINST:
2024 case MONO_TYPE_VALUETYPE:
2025 if (mono_type_is_enum_type (type)) {
2026 MonoType *utype = mono_type_get_underlying_type_any (type);
2028 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Could not resolve underlying type of %x at %d", type->type, ctx->ip_offset));
2032 type_kind = type->type;
2035 stack->stype = TYPE_COMPLEX | mask;
2039 VERIFIER_DEBUG ( printf ("unknown type 0x%02x in eval stack type\n", type->type); );
2040 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Illegal value set on stack 0x%02x at %d", type->type, ctx->ip_offset));
2047 * init_stack_with_value_at_exception_boundary:
2049 * Initialize the stack and push a given type.
2050 * The instruction is marked as been on the exception boundary.
2053 init_stack_with_value_at_exception_boundary (VerifyContext *ctx, ILCodeDesc *code, MonoClass *klass)
2056 MonoType *type = mono_class_inflate_generic_type_checked (&klass->byval_arg, ctx->generic_context, &error);
2058 if (!mono_error_ok (&error)) {
2059 char *name = mono_type_get_full_name (klass);
2060 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid class %s used for exception", name));
2062 mono_error_cleanup (&error);
2066 if (!ctx->max_stack) {
2067 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack overflow at 0x%04x", ctx->ip_offset));
2071 stack_init (ctx, code);
2072 ensure_stack_size (code, 1);
2073 set_stack_value (ctx, code->stack, type, FALSE);
2074 ctx->exception_types = g_slist_prepend (ctx->exception_types, type);
2076 code->flags |= IL_CODE_FLAG_WAS_TARGET;
2077 if (mono_type_is_generic_argument (type))
2078 code->stack->stype |= BOXED_MASK;
2080 /* Class lazy loading functions */
2081 static GENERATE_GET_CLASS_WITH_CACHE (ienumerable, System.Collections.Generic, IEnumerable`1)
2082 static GENERATE_GET_CLASS_WITH_CACHE (icollection, System.Collections.Generic, ICollection`1)
2083 static GENERATE_GET_CLASS_WITH_CACHE (ireadonly_list, System.Collections.Generic, IReadOnlyList`1)
2084 static GENERATE_GET_CLASS_WITH_CACHE (ireadonly_collection, System.Collections.Generic, IReadOnlyCollection`1)
2088 get_ienumerable_class (void)
2090 return mono_class_get_ienumerable_class ();
2094 get_icollection_class (void)
2096 return mono_class_get_icollection_class ();
2100 get_ireadonlylist_class (void)
2102 return mono_class_get_ireadonly_list_class ();
2106 get_ireadonlycollection_class (void)
2108 return mono_class_get_ireadonly_collection_class ();
2112 inflate_class_one_arg (MonoClass *gtype, MonoClass *arg0)
2115 args [0] = &arg0->byval_arg;
2117 return mono_class_bind_generic_parameters (gtype, 1, args, FALSE);
2121 verifier_inflate_and_check_compat (MonoClass *target, MonoClass *gtd, MonoClass *arg)
2124 if (!(tmp = inflate_class_one_arg (gtd, arg)))
2126 if (mono_class_is_variant_compatible (target, tmp, TRUE))
2132 verifier_class_is_assignable_from (MonoClass *target, MonoClass *candidate)
2134 MonoClass *iface_gtd;
2136 if (target == candidate)
2139 if (mono_class_has_variant_generic_params (target)) {
2140 if (MONO_CLASS_IS_INTERFACE (target)) {
2141 if (MONO_CLASS_IS_INTERFACE (candidate) && mono_class_is_variant_compatible (target, candidate, TRUE))
2144 if (candidate->rank == 1) {
2145 if (verifier_inflate_and_check_compat (target, mono_defaults.generic_ilist_class, candidate->element_class))
2147 if (verifier_inflate_and_check_compat (target, get_icollection_class (), candidate->element_class))
2149 if (verifier_inflate_and_check_compat (target, get_ienumerable_class (), candidate->element_class))
2151 if (verifier_inflate_and_check_compat (target, get_ireadonlylist_class (), candidate->element_class))
2153 if (verifier_inflate_and_check_compat (target, get_ireadonlycollection_class (), candidate->element_class))
2158 while (candidate && candidate != mono_defaults.object_class) {
2159 mono_class_setup_interfaces (candidate, &error);
2160 if (!mono_error_ok (&error)) {
2161 mono_error_cleanup (&error);
2165 /*klass is a generic variant interface, We need to extract from oklass a list of ifaces which are viable candidates.*/
2166 for (i = 0; i < candidate->interface_offsets_count; ++i) {
2167 MonoClass *iface = candidate->interfaces_packed [i];
2168 if (mono_class_is_variant_compatible (target, iface, TRUE))
2172 for (i = 0; i < candidate->interface_count; ++i) {
2173 MonoClass *iface = candidate->interfaces [i];
2174 if (mono_class_is_variant_compatible (target, iface, TRUE))
2177 candidate = candidate->parent;
2180 } else if (target->delegate) {
2181 if (mono_class_is_variant_compatible (target, candidate, TRUE))
2187 if (mono_class_is_assignable_from (target, candidate))
2190 if (!MONO_CLASS_IS_INTERFACE (target) || !target->generic_class || candidate->rank != 1)
2193 iface_gtd = target->generic_class->container_class;
2194 if (iface_gtd != mono_defaults.generic_ilist_class && iface_gtd != get_icollection_class () && iface_gtd != get_ienumerable_class ())
2197 target = mono_class_from_mono_type (target->generic_class->context.class_inst->type_argv [0]);
2198 candidate = candidate->element_class;
2203 /*Verify if type 'candidate' can be stored in type 'target'.
2205 * If strict, check for the underlying type and not the verification stack types
2208 verify_type_compatibility_full (VerifyContext *ctx, MonoType *target, MonoType *candidate, gboolean strict)
2210 #define IS_ONE_OF3(T, A, B, C) (T == A || T == B || T == C)
2211 #define IS_ONE_OF2(T, A, B) (T == A || T == B)
2213 MonoType *original_candidate = candidate;
2214 VERIFIER_DEBUG ( printf ("checking type compatibility %s x %s strict %d\n", mono_type_full_name (target), mono_type_full_name (candidate), strict); );
2216 /*only one is byref */
2217 if (candidate->byref ^ target->byref) {
2218 /* converting from native int to byref*/
2219 if (get_stack_type (candidate) == TYPE_NATIVE_INT && target->byref) {
2220 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("using byref native int at 0x%04x", ctx->ip_offset));
2225 strict |= target->byref;
2226 /*From now on we don't care about byref anymore, so it's ok to discard it here*/
2227 candidate = mono_type_get_underlying_type_any (candidate);
2230 switch (target->type) {
2231 case MONO_TYPE_VOID:
2232 return candidate->type == MONO_TYPE_VOID;
2235 case MONO_TYPE_BOOLEAN:
2237 return IS_ONE_OF3 (candidate->type, MONO_TYPE_I1, MONO_TYPE_U1, MONO_TYPE_BOOLEAN);
2240 case MONO_TYPE_CHAR:
2242 return IS_ONE_OF3 (candidate->type, MONO_TYPE_I2, MONO_TYPE_U2, MONO_TYPE_CHAR);
2244 case MONO_TYPE_U4: {
2245 gboolean is_native_int = IS_ONE_OF2 (candidate->type, MONO_TYPE_I, MONO_TYPE_U);
2246 gboolean is_int4 = IS_ONE_OF2 (candidate->type, MONO_TYPE_I4, MONO_TYPE_U4);
2248 return is_native_int || is_int4;
2249 return is_native_int || get_stack_type (candidate) == TYPE_I4;
2254 return IS_ONE_OF2 (candidate->type, MONO_TYPE_I8, MONO_TYPE_U8);
2259 return candidate->type == target->type;
2260 return IS_ONE_OF2 (candidate->type, MONO_TYPE_R4, MONO_TYPE_R8);
2264 gboolean is_native_int = IS_ONE_OF2 (candidate->type, MONO_TYPE_I, MONO_TYPE_U);
2265 gboolean is_int4 = IS_ONE_OF2 (candidate->type, MONO_TYPE_I4, MONO_TYPE_U4);
2267 return is_native_int || is_int4;
2268 return is_native_int || get_stack_type (candidate) == TYPE_I4;
2272 if (candidate->type != MONO_TYPE_PTR)
2274 /* check the underlying type */
2275 return verify_type_compatibility_full (ctx, target->data.type, candidate->data.type, TRUE);
2277 case MONO_TYPE_FNPTR: {
2278 MonoMethodSignature *left, *right;
2279 if (candidate->type != MONO_TYPE_FNPTR)
2282 left = mono_type_get_signature (target);
2283 right = mono_type_get_signature (candidate);
2284 return mono_metadata_signature_equal (left, right) && left->call_convention == right->call_convention;
2287 case MONO_TYPE_GENERICINST: {
2288 MonoClass *target_klass;
2289 MonoClass *candidate_klass;
2290 if (mono_type_is_enum_type (target)) {
2291 target = mono_type_get_underlying_type_any (target);
2297 * VAR / MVAR compatibility must be checked by verify_stack_type_compatibility
2298 * to take boxing status into account.
2300 if (mono_type_is_generic_argument (original_candidate))
2303 target_klass = mono_class_from_mono_type (target);
2304 candidate_klass = mono_class_from_mono_type (candidate);
2305 if (mono_class_is_nullable (target_klass)) {
2306 if (!mono_class_is_nullable (candidate_klass))
2308 return target_klass == candidate_klass;
2310 return verifier_class_is_assignable_from (target_klass, candidate_klass);
2313 case MONO_TYPE_STRING:
2314 return candidate->type == MONO_TYPE_STRING;
2316 case MONO_TYPE_CLASS:
2318 * VAR / MVAR compatibility must be checked by verify_stack_type_compatibility
2319 * to take boxing status into account.
2321 if (mono_type_is_generic_argument (original_candidate))
2324 if (candidate->type == MONO_TYPE_VALUETYPE)
2327 /* If candidate is an enum it should return true for System.Enum and supertypes.
2328 * That's why here we use the original type and not the underlying type.
2330 return verifier_class_is_assignable_from (target->data.klass, mono_class_from_mono_type (original_candidate));
2332 case MONO_TYPE_OBJECT:
2333 return MONO_TYPE_IS_REFERENCE (candidate);
2335 case MONO_TYPE_SZARRAY: {
2338 if (candidate->type != MONO_TYPE_SZARRAY)
2341 left = mono_class_from_mono_type (target);
2342 right = mono_class_from_mono_type (candidate);
2344 return verifier_class_is_assignable_from (left, right);
2347 case MONO_TYPE_ARRAY:
2348 if (candidate->type != MONO_TYPE_ARRAY)
2350 return is_array_type_compatible (target, candidate);
2352 case MONO_TYPE_TYPEDBYREF:
2353 return candidate->type == MONO_TYPE_TYPEDBYREF;
2355 case MONO_TYPE_VALUETYPE: {
2356 MonoClass *target_klass;
2357 MonoClass *candidate_klass;
2359 if (candidate->type == MONO_TYPE_CLASS)
2362 target_klass = mono_class_from_mono_type (target);
2363 candidate_klass = mono_class_from_mono_type (candidate);
2364 if (target_klass == candidate_klass)
2366 if (mono_type_is_enum_type (target)) {
2367 target = mono_type_get_underlying_type_any (target);
2376 if (candidate->type != MONO_TYPE_VAR)
2378 return mono_type_get_generic_param_num (candidate) == mono_type_get_generic_param_num (target);
2380 case MONO_TYPE_MVAR:
2381 if (candidate->type != MONO_TYPE_MVAR)
2383 return mono_type_get_generic_param_num (candidate) == mono_type_get_generic_param_num (target);
2386 VERIFIER_DEBUG ( printf ("unknown store type %d\n", target->type); );
2387 g_assert_not_reached ();
2396 verify_type_compatibility (VerifyContext *ctx, MonoType *target, MonoType *candidate)
2398 return verify_type_compatibility_full (ctx, target, candidate, FALSE);
2402 * Returns the generic param bound to the context been verified.
2405 static MonoGenericParam*
2406 get_generic_param (VerifyContext *ctx, MonoType *param)
2408 guint16 param_num = mono_type_get_generic_param_num (param);
2409 if (param->type == MONO_TYPE_VAR) {
2410 if (!ctx->generic_context->class_inst || ctx->generic_context->class_inst->type_argc <= param_num) {
2411 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid generic type argument %d", param_num));
2414 return ctx->generic_context->class_inst->type_argv [param_num]->data.generic_param;
2417 /*param must be a MVAR */
2418 if (!ctx->generic_context->method_inst || ctx->generic_context->method_inst->type_argc <= param_num) {
2419 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid generic method argument %d", param_num));
2422 return ctx->generic_context->method_inst->type_argv [param_num]->data.generic_param;
2427 recursive_boxed_constraint_type_check (VerifyContext *ctx, MonoType *type, MonoClass *constraint_class, int recursion_level)
2429 MonoType *constraint_type = &constraint_class->byval_arg;
2430 if (recursion_level <= 0)
2433 if (verify_type_compatibility_full (ctx, type, mono_type_get_type_byval (constraint_type), FALSE))
2436 if (mono_type_is_generic_argument (constraint_type)) {
2437 MonoGenericParam *param = get_generic_param (ctx, constraint_type);
2441 for (klass = mono_generic_param_info (param)->constraints; klass && *klass; ++klass) {
2442 if (recursive_boxed_constraint_type_check (ctx, type, *klass, recursion_level - 1))
2450 * is_compatible_boxed_valuetype:
2452 * Returns: TRUE if @candidate / @stack is a valid boxed valuetype.
2454 * @type The source type. It it tested to be of the proper type.
2455 * @candidate type of the boxed valuetype.
2456 * @stack stack slot of the boxed valuetype, separate from @candidade since one could be changed before calling this function
2457 * @strict if TRUE candidate must be boxed compatible to the target type
2461 is_compatible_boxed_valuetype (VerifyContext *ctx, MonoType *type, MonoType *candidate, ILStackDesc *stack, gboolean strict)
2463 if (!stack_slot_is_boxed_value (stack))
2465 if (type->byref || candidate->byref)
2468 if (mono_type_is_generic_argument (candidate)) {
2469 MonoGenericParam *param = get_generic_param (ctx, candidate);
2474 for (klass = mono_generic_param_info (param)->constraints; klass && *klass; ++klass) {
2475 /*256 should be enough since there can't be more than 255 generic arguments.*/
2476 if (recursive_boxed_constraint_type_check (ctx, type, *klass, 256))
2481 if (mono_type_is_generic_argument (type))
2487 return MONO_TYPE_IS_REFERENCE (type) && verifier_class_is_assignable_from (mono_class_from_mono_type (type), mono_class_from_mono_type (candidate));
2491 verify_stack_type_compatibility_full (VerifyContext *ctx, MonoType *type, ILStackDesc *stack, gboolean drop_byref, gboolean valuetype_must_be_boxed)
2493 MonoType *candidate = mono_type_from_stack_slot (stack);
2494 if (MONO_TYPE_IS_REFERENCE (type) && !type->byref && stack_slot_is_null_literal (stack))
2497 if (is_compatible_boxed_valuetype (ctx, type, candidate, stack, TRUE))
2500 if (valuetype_must_be_boxed && !stack_slot_is_boxed_value (stack) && !MONO_TYPE_IS_REFERENCE (candidate))
2503 if (!valuetype_must_be_boxed && stack_slot_is_boxed_value (stack))
2507 return verify_type_compatibility_full (ctx, type, mono_type_get_type_byval (candidate), FALSE);
2509 /* Handle how Roslyn emit fixed statements by encoding it as byref */
2510 if (type->byref && candidate->byref && (type->type == MONO_TYPE_I) && !mono_type_is_reference (candidate)) {
2511 if (!IS_STRICT_MODE (ctx))
2515 return verify_type_compatibility_full (ctx, type, candidate, FALSE);
2519 verify_stack_type_compatibility (VerifyContext *ctx, MonoType *type, ILStackDesc *stack)
2521 return verify_stack_type_compatibility_full (ctx, type, stack, FALSE, FALSE);
2525 mono_delegate_type_equal (MonoType *target, MonoType *candidate)
2527 if (candidate->byref ^ target->byref)
2530 switch (target->type) {
2531 case MONO_TYPE_VOID:
2534 case MONO_TYPE_BOOLEAN:
2537 case MONO_TYPE_CHAR:
2546 case MONO_TYPE_STRING:
2547 case MONO_TYPE_TYPEDBYREF:
2548 return candidate->type == target->type;
2551 if (candidate->type != MONO_TYPE_PTR)
2553 return mono_delegate_type_equal (target->data.type, candidate->data.type);
2555 case MONO_TYPE_FNPTR:
2556 if (candidate->type != MONO_TYPE_FNPTR)
2558 return mono_delegate_signature_equal (mono_type_get_signature (target), mono_type_get_signature (candidate), FALSE);
2560 case MONO_TYPE_GENERICINST: {
2561 MonoClass *target_klass;
2562 MonoClass *candidate_klass;
2563 target_klass = mono_class_from_mono_type (target);
2564 candidate_klass = mono_class_from_mono_type (candidate);
2565 /*FIXME handle nullables and enum*/
2566 return verifier_class_is_assignable_from (target_klass, candidate_klass);
2568 case MONO_TYPE_OBJECT:
2569 return MONO_TYPE_IS_REFERENCE (candidate);
2571 case MONO_TYPE_CLASS:
2572 return verifier_class_is_assignable_from(target->data.klass, mono_class_from_mono_type (candidate));
2574 case MONO_TYPE_SZARRAY:
2575 if (candidate->type != MONO_TYPE_SZARRAY)
2577 return verifier_class_is_assignable_from (mono_class_from_mono_type (target)->element_class, mono_class_from_mono_type (candidate)->element_class);
2579 case MONO_TYPE_ARRAY:
2580 if (candidate->type != MONO_TYPE_ARRAY)
2582 return is_array_type_compatible (target, candidate);
2584 case MONO_TYPE_VALUETYPE:
2585 /*FIXME handle nullables and enum*/
2586 return mono_class_from_mono_type (candidate) == mono_class_from_mono_type (target);
2589 return candidate->type == MONO_TYPE_VAR && mono_type_get_generic_param_num (target) == mono_type_get_generic_param_num (candidate);
2592 case MONO_TYPE_MVAR:
2593 return candidate->type == MONO_TYPE_MVAR && mono_type_get_generic_param_num (target) == mono_type_get_generic_param_num (candidate);
2597 VERIFIER_DEBUG ( printf ("Unknown type %d. Implement me!\n", target->type); );
2598 g_assert_not_reached ();
2604 mono_delegate_param_equal (MonoType *delegate, MonoType *method)
2606 if (mono_metadata_type_equal_full (delegate, method, TRUE))
2609 return mono_delegate_type_equal (method, delegate);
2613 mono_delegate_ret_equal (MonoType *delegate, MonoType *method)
2615 if (mono_metadata_type_equal_full (delegate, method, TRUE))
2618 return mono_delegate_type_equal (delegate, method);
2622 * mono_delegate_signature_equal:
2624 * Compare two signatures in the way expected by delegates.
2626 * This function only exists due to the fact that it should ignore the 'has_this' part of the signature.
2628 * FIXME can this function be eliminated and proper metadata functionality be used?
2631 mono_delegate_signature_equal (MonoMethodSignature *delegate_sig, MonoMethodSignature *method_sig, gboolean is_static_ldftn)
2634 int method_offset = is_static_ldftn ? 1 : 0;
2636 if (delegate_sig->param_count + method_offset != method_sig->param_count)
2639 if (delegate_sig->call_convention != method_sig->call_convention)
2642 for (i = 0; i < delegate_sig->param_count; i++) {
2643 MonoType *p1 = delegate_sig->params [i];
2644 MonoType *p2 = method_sig->params [i + method_offset];
2646 if (!mono_delegate_param_equal (p1, p2))
2650 if (!mono_delegate_ret_equal (delegate_sig->ret, method_sig->ret))
2657 mono_verifier_is_signature_compatible (MonoMethodSignature *target, MonoMethodSignature *candidate)
2659 return mono_delegate_signature_equal (target, candidate, FALSE);
2663 * verify_ldftn_delegate:
2665 * Verify properties of ldftn based delegates.
2668 verify_ldftn_delegate (VerifyContext *ctx, MonoClass *delegate, ILStackDesc *value, ILStackDesc *funptr)
2670 MonoMethod *method = funptr->method;
2672 /*ldftn non-final virtuals only allowed if method is not static,
2673 * the object is a this arg (comes from a ldarg.0), and there is no starg.0.
2674 * This rules doesn't apply if the object on stack is a boxed valuetype.
2676 if ((method->flags & METHOD_ATTRIBUTE_VIRTUAL) && !(method->flags & METHOD_ATTRIBUTE_FINAL) && !(method->klass->flags & TYPE_ATTRIBUTE_SEALED) && !stack_slot_is_boxed_value (value)) {
2677 /*A stdarg 0 must not happen, we fail here only in fail fast mode to avoid double error reports*/
2678 if (IS_FAIL_FAST_MODE (ctx) && ctx->has_this_store)
2679 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid ldftn with virtual function in method with stdarg 0 at 0x%04x", ctx->ip_offset));
2681 /*current method must not be static*/
2682 if (ctx->method->flags & METHOD_ATTRIBUTE_STATIC)
2683 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid ldftn with virtual function at 0x%04x", ctx->ip_offset));
2685 /*value is the this pointer, loaded using ldarg.0 */
2686 if (!stack_slot_is_this_pointer (value))
2687 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));
2689 ctx->code [ctx->ip_offset].flags |= IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL;
2694 * verify_delegate_compatibility:
2696 * Verify delegate creation sequence.
2700 verify_delegate_compatibility (VerifyContext *ctx, MonoClass *delegate, ILStackDesc *value, ILStackDesc *funptr)
2702 #define IS_VALID_OPCODE(offset, opcode) (ip [ip_offset - offset] == opcode && (ctx->code [ip_offset - offset].flags & IL_CODE_FLAG_SEEN))
2703 #define IS_LOAD_FUN_PTR(kind) (IS_VALID_OPCODE (6, CEE_PREFIX1) && ip [ip_offset - 5] == kind)
2705 MonoMethod *invoke, *method;
2706 const guint8 *ip = ctx->header->code;
2707 guint32 ip_offset = ctx->ip_offset;
2708 gboolean is_static_ldftn = FALSE, is_first_arg_bound = FALSE;
2710 if (stack_slot_get_type (funptr) != TYPE_PTR || !funptr->method) {
2711 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid function pointer parameter for delegate constructor at 0x%04x", ctx->ip_offset));
2715 invoke = mono_get_delegate_invoke (delegate);
2716 method = funptr->method;
2718 if (!method || !mono_method_signature (method)) {
2719 char *name = mono_type_get_full_name (delegate);
2720 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid method on stack to create delegate %s construction at 0x%04x", name, ctx->ip_offset));
2725 if (!invoke || !mono_method_signature (invoke)) {
2726 char *name = mono_type_get_full_name (delegate);
2727 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Delegate type %s with bad Invoke method at 0x%04x", name, ctx->ip_offset));
2732 is_static_ldftn = (ip_offset > 5 && IS_LOAD_FUN_PTR (CEE_LDFTN)) && method->flags & METHOD_ATTRIBUTE_STATIC;
2734 if (is_static_ldftn)
2735 is_first_arg_bound = mono_method_signature (invoke)->param_count + 1 == mono_method_signature (method)->param_count;
2737 if (!mono_delegate_signature_equal (mono_method_signature (invoke), mono_method_signature (method), is_first_arg_bound)) {
2738 char *fun_sig = mono_signature_get_desc (mono_method_signature (method), FALSE);
2739 char *invoke_sig = mono_signature_get_desc (mono_method_signature (invoke), FALSE);
2740 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));
2742 g_free (invoke_sig);
2746 * Delegate code sequences:
2752 * [-6] ldvirtftn token
2756 if (ip_offset > 5 && IS_LOAD_FUN_PTR (CEE_LDFTN)) {
2757 verify_ldftn_delegate (ctx, delegate, value, funptr);
2758 } else if (ip_offset > 6 && IS_VALID_OPCODE (7, CEE_DUP) && IS_LOAD_FUN_PTR (CEE_LDVIRTFTN)) {
2759 ctx->code [ip_offset - 6].flags |= IL_CODE_DELEGATE_SEQUENCE;
2761 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid code sequence for delegate creation at 0x%04x", ctx->ip_offset));
2763 ctx->code [ip_offset].flags |= IL_CODE_DELEGATE_SEQUENCE;
2766 if (is_first_arg_bound) {
2767 if (mono_method_signature (method)->param_count == 0 || !verify_stack_type_compatibility_full (ctx, mono_method_signature (method)->params [0], value, FALSE, TRUE))
2768 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("This object not compatible with function pointer for delegate creation at 0x%04x", ctx->ip_offset));
2770 if (method->flags & METHOD_ATTRIBUTE_STATIC) {
2771 if (!stack_slot_is_null_literal (value) && !is_first_arg_bound)
2772 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Non-null this args used with static function for delegate creation at 0x%04x", ctx->ip_offset));
2774 if (!verify_stack_type_compatibility_full (ctx, &method->klass->byval_arg, value, FALSE, TRUE) && !stack_slot_is_null_literal (value))
2775 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("This object not compatible with function pointer for delegate creation at 0x%04x", ctx->ip_offset));
2779 if (stack_slot_get_type (value) != TYPE_COMPLEX)
2780 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid first parameter for delegate creation at 0x%04x", ctx->ip_offset));
2782 #undef IS_VALID_OPCODE
2783 #undef IS_LOAD_FUN_PTR
2786 /* implement the opcode checks*/
2788 push_arg (VerifyContext *ctx, unsigned int arg, int take_addr)
2792 if (arg >= ctx->max_args) {
2794 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have argument %d", arg + 1));
2796 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method doesn't have argument %d", arg + 1));
2797 if (check_overflow (ctx)) //FIXME: what sane value could we ever push?
2798 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
2800 } else if (check_overflow (ctx)) {
2801 /*We must let the value be pushed, otherwise we would get an underflow error*/
2802 check_unverifiable_type (ctx, ctx->params [arg]);
2803 if (ctx->params [arg]->byref && take_addr)
2804 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ByRef of ByRef at 0x%04x", ctx->ip_offset));
2805 top = stack_push (ctx);
2806 if (!set_stack_value (ctx, top, ctx->params [arg], take_addr))
2809 if (arg == 0 && !(ctx->method->flags & METHOD_ATTRIBUTE_STATIC)) {
2811 ctx->has_this_store = TRUE;
2813 top->stype |= THIS_POINTER_MASK;
2814 if (mono_method_is_constructor (ctx->method) && !ctx->super_ctor_called && !ctx->method->klass->valuetype)
2815 top->stype |= UNINIT_THIS_MASK;
2821 push_local (VerifyContext *ctx, guint32 arg, int take_addr)
2823 if (arg >= ctx->num_locals) {
2824 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have local %d", arg + 1));
2825 } else if (check_overflow (ctx)) {
2826 /*We must let the value be pushed, otherwise we would get an underflow error*/
2827 check_unverifiable_type (ctx, ctx->locals [arg]);
2828 if (ctx->locals [arg]->byref && take_addr)
2829 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ByRef of ByRef at 0x%04x", ctx->ip_offset));
2831 set_stack_value (ctx, stack_push (ctx), ctx->locals [arg], take_addr);
2836 store_arg (VerifyContext *ctx, guint32 arg)
2840 if (arg >= ctx->max_args) {
2841 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method doesn't have argument %d at 0x%04x", arg + 1, ctx->ip_offset));
2842 if (check_underflow (ctx, 1))
2847 if (check_underflow (ctx, 1)) {
2848 value = stack_pop (ctx);
2849 if (!verify_stack_type_compatibility (ctx, ctx->params [arg], value)) {
2850 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type %s in argument store at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
2853 if (arg == 0 && !(ctx->method->flags & METHOD_ATTRIBUTE_STATIC))
2854 ctx->has_this_store = 1;
2858 store_local (VerifyContext *ctx, guint32 arg)
2861 if (arg >= ctx->num_locals) {
2862 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have local var %d at 0x%04x", arg + 1, ctx->ip_offset));
2866 /*TODO verify definite assigment */
2867 if (!check_underflow (ctx, 1))
2870 value = stack_pop (ctx);
2871 if (ctx->locals [arg]->byref && stack_slot_is_managed_mutability_pointer (value))
2872 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));
2874 if (!verify_stack_type_compatibility (ctx, ctx->locals [arg], value)) {
2875 char *expected = mono_type_full_name (ctx->locals [arg]);
2876 char *found = stack_slot_full_name (value);
2877 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type '%s' on stack cannot be stored to local %d with type '%s' at 0x%04x",
2887 /*FIXME add and sub needs special care here*/
2889 do_binop (VerifyContext *ctx, unsigned int opcode, const unsigned char table [TYPE_MAX][TYPE_MAX])
2891 ILStackDesc *a, *b, *top;
2892 int idxa, idxb, complexMerge = 0;
2895 if (!check_underflow (ctx, 2))
2897 b = stack_pop (ctx);
2898 a = stack_pop (ctx);
2900 idxa = stack_slot_get_underlying_type (a);
2901 if (stack_slot_is_managed_pointer (a)) {
2906 idxb = stack_slot_get_underlying_type (b);
2907 if (stack_slot_is_managed_pointer (b)) {
2914 res = table [idxa][idxb];
2916 VERIFIER_DEBUG ( printf ("binop res %d\n", res); );
2917 VERIFIER_DEBUG ( printf ("idxa %d idxb %d\n", idxa, idxb); );
2919 top = stack_push (ctx);
2920 if (res == TYPE_INV) {
2921 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)));
2922 copy_stack_value (top, a);
2926 if (res & NON_VERIFIABLE_RESULT) {
2927 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)));
2929 res = res & ~NON_VERIFIABLE_RESULT;
2932 if (complexMerge && res == TYPE_PTR) {
2933 if (complexMerge == 1)
2934 copy_stack_value (top, a);
2935 else if (complexMerge == 2)
2936 copy_stack_value (top, b);
2938 * There is no need to merge the type of two pointers.
2939 * The only valid operation is subtraction, that returns a native
2940 * int as result and can be used with any 2 pointer kinds.
2941 * This is valid acording to Patition III 1.1.4
2950 do_boolean_branch_op (VerifyContext *ctx, int delta)
2952 int target = ctx->ip_offset + delta;
2955 VERIFIER_DEBUG ( printf ("boolean branch offset %d delta %d target %d\n", ctx->ip_offset, delta, target); );
2957 if (target < 0 || target >= ctx->code_size) {
2958 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Boolean branch target out of code at 0x%04x", ctx->ip_offset));
2962 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
2964 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
2967 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
2971 ctx->target = target;
2973 if (!check_underflow (ctx, 1))
2976 top = stack_pop (ctx);
2977 if (!is_valid_bool_arg (top))
2978 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));
2980 check_unmanaged_pointer (ctx, top);
2984 stack_slot_is_complex_type_not_reference_type (ILStackDesc *slot)
2986 return stack_slot_get_type (slot) == TYPE_COMPLEX && !MONO_TYPE_IS_REFERENCE (slot->type) && !stack_slot_is_boxed_value (slot);
2990 stack_slot_is_reference_value (ILStackDesc *slot)
2992 return stack_slot_get_type (slot) == TYPE_COMPLEX && (MONO_TYPE_IS_REFERENCE (slot->type) || stack_slot_is_boxed_value (slot));
2996 do_branch_op (VerifyContext *ctx, signed int delta, const unsigned char table [TYPE_MAX][TYPE_MAX])
3001 int target = ctx->ip_offset + delta;
3003 VERIFIER_DEBUG ( printf ("branch offset %d delta %d target %d\n", ctx->ip_offset, delta, target); );
3005 if (target < 0 || target >= ctx->code_size) {
3006 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target out of code at 0x%04x", ctx->ip_offset));
3010 switch (is_valid_cmp_branch_instruction (ctx->header, ctx->ip_offset, target)) {
3011 case 1: /*FIXME use constants and not magic numbers.*/
3012 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
3015 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
3019 ctx->target = target;
3021 if (!check_underflow (ctx, 2))
3024 b = stack_pop (ctx);
3025 a = stack_pop (ctx);
3027 idxa = stack_slot_get_underlying_type (a);
3028 if (stack_slot_is_managed_pointer (a))
3031 idxb = stack_slot_get_underlying_type (b);
3032 if (stack_slot_is_managed_pointer (b))
3035 if (stack_slot_is_complex_type_not_reference_type (a) || stack_slot_is_complex_type_not_reference_type (b)) {
3040 res = table [idxa][idxb];
3043 VERIFIER_DEBUG ( printf ("branch res %d\n", res); );
3044 VERIFIER_DEBUG ( printf ("idxa %d idxb %d\n", idxa, idxb); );
3046 if (res == TYPE_INV) {
3047 CODE_NOT_VERIFIABLE (ctx,
3048 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));
3049 } else if (res & NON_VERIFIABLE_RESULT) {
3050 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));
3051 res = res & ~NON_VERIFIABLE_RESULT;
3056 do_cmp_op (VerifyContext *ctx, const unsigned char table [TYPE_MAX][TYPE_MAX], guint32 opcode)
3062 if (!check_underflow (ctx, 2))
3064 b = stack_pop (ctx);
3065 a = stack_pop (ctx);
3067 if (opcode == CEE_CGT_UN) {
3068 if ((stack_slot_is_reference_value (a) && stack_slot_is_null_literal (b)) ||
3069 (stack_slot_is_reference_value (b) && stack_slot_is_null_literal (a))) {
3070 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3075 idxa = stack_slot_get_underlying_type (a);
3076 if (stack_slot_is_managed_pointer (a))
3079 idxb = stack_slot_get_underlying_type (b);
3080 if (stack_slot_is_managed_pointer (b))
3083 if (stack_slot_is_complex_type_not_reference_type (a) || stack_slot_is_complex_type_not_reference_type (b)) {
3088 res = table [idxa][idxb];
3091 if(res == TYPE_INV) {
3092 char *left_type = stack_slot_full_name (a);
3093 char *right_type = stack_slot_full_name (b);
3094 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));
3096 g_free (right_type);
3097 } else if (res & NON_VERIFIABLE_RESULT) {
3098 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));
3099 res = res & ~NON_VERIFIABLE_RESULT;
3101 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3105 do_ret (VerifyContext *ctx)
3107 MonoType *ret = ctx->signature->ret;
3108 VERIFIER_DEBUG ( printf ("checking ret\n"); );
3109 if (ret->type != MONO_TYPE_VOID) {
3111 if (!check_underflow (ctx, 1))
3114 top = stack_pop(ctx);
3116 if (!verify_stack_type_compatibility (ctx, ctx->signature->ret, top)) {
3117 char *ret_type = mono_type_full_name (ctx->signature->ret);
3118 char *stack_type = stack_slot_full_name (top);
3119 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));
3120 g_free (stack_type);
3125 if (ret->byref || ret->type == MONO_TYPE_TYPEDBYREF || mono_type_is_value_type (ret, "System", "ArgIterator") || mono_type_is_value_type (ret, "System", "RuntimeArgumentHandle"))
3126 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method returns byref, TypedReference, ArgIterator or RuntimeArgumentHandle at 0x%04x", ctx->ip_offset));
3129 if (ctx->eval.size > 0) {
3130 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack not empty (%d) after ret at 0x%04x", ctx->eval.size, ctx->ip_offset));
3132 if (in_any_block (ctx->header, ctx->ip_offset))
3133 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ret cannot escape exception blocks at 0x%04x", ctx->ip_offset));
3137 * 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.
3138 * This is illegal but mono_get_method_full decoded it.
3139 * TODO handle calling .ctor outside one or calling the .ctor for other class but super
3142 do_invoke_method (VerifyContext *ctx, int method_token, gboolean virtual_)
3146 MonoMethodSignature *sig;
3149 gboolean virt_check_this = FALSE;
3150 gboolean constrained = ctx->prefix_set & PREFIX_CONSTRAINED;
3152 if (!(method = verifier_load_method (ctx, method_token, virtual_ ? "callvirt" : "call")))
3156 CLEAR_PREFIX (ctx, PREFIX_CONSTRAINED);
3158 if (method->klass->valuetype) // && !constrained ???
3159 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use callvirtual with valuetype method at 0x%04x", ctx->ip_offset));
3161 if ((method->flags & METHOD_ATTRIBUTE_STATIC))
3162 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use callvirtual with static method at 0x%04x", ctx->ip_offset));
3165 if (method->flags & METHOD_ATTRIBUTE_ABSTRACT)
3166 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use call with an abstract method at 0x%04x", ctx->ip_offset));
3168 if ((method->flags & METHOD_ATTRIBUTE_VIRTUAL) && !(method->flags & METHOD_ATTRIBUTE_FINAL) && !(method->klass->flags & TYPE_ATTRIBUTE_SEALED)) {
3169 virt_check_this = TRUE;
3170 ctx->code [ctx->ip_offset].flags |= IL_CODE_CALL_NONFINAL_VIRTUAL;
3174 if (!(sig = mono_method_get_signature_checked (method, ctx->image, method_token, ctx->generic_context, &error))) {
3175 mono_error_cleanup (&error);
3176 sig = mono_method_get_signature_checked (method, ctx->image, method_token, NULL, &error);
3180 char *name = mono_type_get_full_name (method->klass);
3181 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)));
3182 mono_error_cleanup (&error);
3187 param_count = sig->param_count + sig->hasthis;
3188 if (!check_underflow (ctx, param_count))
3191 for (i = sig->param_count - 1; i >= 0; --i) {
3192 VERIFIER_DEBUG ( printf ("verifying argument %d\n", i); );
3193 value = stack_pop (ctx);
3194 if (!verify_stack_type_compatibility (ctx, sig->params[i], value)) {
3195 char *stack_name = stack_slot_full_name (value);
3196 char *sig_name = mono_type_full_name (sig->params [i]);
3197 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));
3198 g_free (stack_name);
3202 if (stack_slot_is_managed_mutability_pointer (value))
3203 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));
3205 if ((ctx->prefix_set & PREFIX_TAIL) && stack_slot_is_managed_pointer (value)) {
3206 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));
3212 MonoType *type = &method->klass->byval_arg;
3215 if (mono_method_is_constructor (method) && !method->klass->valuetype) {
3216 if (IS_STRICT_MODE (ctx) && !mono_method_is_constructor (ctx->method))
3217 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot call a constructor outside one at 0x%04x", ctx->ip_offset));
3218 if (IS_STRICT_MODE (ctx) && method->klass != ctx->method->klass->parent && method->klass != ctx->method->klass)
3219 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));
3221 ctx->super_ctor_called = TRUE;
3222 value = stack_pop_safe (ctx);
3223 if (IS_STRICT_MODE (ctx) && (value->stype & THIS_POINTER_MASK) != THIS_POINTER_MASK)
3224 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid 'this ptr' argument for constructor at 0x%04x", ctx->ip_offset));
3226 value = stack_pop (ctx);
3229 copy_stack_value (©, value);
3230 //TODO we should extract this to a 'drop_byref_argument' and use everywhere
3231 //Other parts of the code suffer from the same issue of
3232 copy.type = mono_type_get_type_byval (copy.type);
3233 copy.stype &= ~POINTER_MASK;
3235 if (virt_check_this && !stack_slot_is_this_pointer (value) && !(method->klass->valuetype || stack_slot_is_boxed_value (value)))
3236 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));
3238 if (constrained && virtual_) {
3239 if (!stack_slot_is_managed_pointer (value))
3240 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Object is not a managed pointer for a constrained call at 0x%04x", ctx->ip_offset));
3241 if (!mono_metadata_type_equal_full (mono_type_get_type_byval (value->type), mono_type_get_underlying_type (ctx->constrained_type), TRUE))
3242 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Object not compatible with constrained type at 0x%04x", ctx->ip_offset));
3243 copy.stype |= BOXED_MASK;
3244 copy.type = ctx->constrained_type;
3246 if (stack_slot_is_managed_pointer (value) && !mono_class_from_mono_type (value->type)->valuetype)
3247 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));
3249 if (!virtual_ && mono_class_from_mono_type (value->type)->valuetype && !method->klass->valuetype && !stack_slot_is_boxed_value (value))
3250 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot call a valuetype baseclass at 0x%04x", ctx->ip_offset));
3252 if (virtual_ && mono_class_from_mono_type (value->type)->valuetype && !stack_slot_is_boxed_value (value))
3253 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a valuetype with callvirt at 0x%04x", ctx->ip_offset));
3255 if (method->klass->valuetype && (stack_slot_is_boxed_value (value) || !stack_slot_is_managed_pointer (value)))
3256 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));
3258 if (!verify_stack_type_compatibility (ctx, type, ©)) {
3259 char *expected = mono_type_full_name (type);
3260 char *effective = stack_slot_full_name (©);
3261 char *method_name = mono_method_full_name (method, TRUE);
3262 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",
3263 expected, effective, method_name, ctx->ip_offset));
3264 g_free (method_name);
3269 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, mono_class_from_mono_type (value->type))) {
3270 char *name = mono_method_full_name (method, TRUE);
3271 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Method %s is not accessible at 0x%04x", name, ctx->ip_offset), MONO_EXCEPTION_METHOD_ACCESS);
3275 } else if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, NULL)) {
3276 char *name = mono_method_full_name (method, TRUE);
3277 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Method %s is not accessible at 0x%04x", name, ctx->ip_offset), MONO_EXCEPTION_METHOD_ACCESS);
3281 if (sig->ret->type != MONO_TYPE_VOID) {
3282 if (!mono_type_is_valid_in_context (ctx, sig->ret))
3285 if (check_overflow (ctx)) {
3286 value = stack_push (ctx);
3287 set_stack_value (ctx, value, sig->ret, FALSE);
3288 if ((ctx->prefix_set & PREFIX_READONLY) && method->klass->rank && !strcmp (method->name, "Address")) {
3289 ctx->prefix_set &= ~PREFIX_READONLY;
3290 value->stype |= CMMP_MASK;
3295 if ((ctx->prefix_set & PREFIX_TAIL)) {
3296 if (!mono_delegate_ret_equal (mono_method_signature (ctx->method)->ret, sig->ret))
3297 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Tail call with incompatible return type at 0x%04x", ctx->ip_offset));
3298 if (ctx->header->code [ctx->ip_offset + 5] != CEE_RET)
3299 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Tail call not followed by ret at 0x%04x", ctx->ip_offset));
3305 do_push_static_field (VerifyContext *ctx, int token, gboolean take_addr)
3307 MonoClassField *field;
3309 if (!check_overflow (ctx))
3312 CLEAR_PREFIX (ctx, PREFIX_VOLATILE);
3314 if (!(field = verifier_load_field (ctx, token, &klass, take_addr ? "ldsflda" : "ldsfld")))
3317 if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC)) {
3318 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot load non static field at 0x%04x", ctx->ip_offset));
3321 /*taking the address of initonly field only works from the static constructor */
3322 if (take_addr && (field->type->attrs & FIELD_ATTRIBUTE_INIT_ONLY) &&
3323 !(field->parent == ctx->method->klass && (ctx->method->flags & (METHOD_ATTRIBUTE_SPECIAL_NAME | METHOD_ATTRIBUTE_STATIC)) && !strcmp (".cctor", ctx->method->name)))
3324 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a init-only field at 0x%04x", ctx->ip_offset));
3326 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3327 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3329 set_stack_value (ctx, stack_push (ctx), field->type, take_addr);
3333 do_store_static_field (VerifyContext *ctx, int token) {
3334 MonoClassField *field;
3337 CLEAR_PREFIX (ctx, PREFIX_VOLATILE);
3339 if (!check_underflow (ctx, 1))
3342 value = stack_pop (ctx);
3344 if (!(field = verifier_load_field (ctx, token, &klass, "stsfld")))
3347 if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC)) {
3348 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot store non static field at 0x%04x", ctx->ip_offset));
3352 if (field->type->type == MONO_TYPE_TYPEDBYREF) {
3353 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Typedbyref field is an unverfiable type in store static field at 0x%04x", ctx->ip_offset));
3357 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3358 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3360 if (!verify_stack_type_compatibility (ctx, field->type, value)) {
3361 char *stack_name = stack_slot_full_name (value);
3362 char *field_name = mono_type_full_name (field->type);
3363 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type in static field store expected '%s' but found '%s' at 0x%04x",
3364 field_name, stack_name, ctx->ip_offset));
3365 g_free (field_name);
3366 g_free (stack_name);
3371 check_is_valid_type_for_field_ops (VerifyContext *ctx, int token, ILStackDesc *obj, MonoClassField **ret_field, const char *opcode)
3373 MonoClassField *field;
3375 gboolean is_pointer;
3377 /*must be a reference type, a managed pointer, an unamanaged pointer, or a valuetype*/
3378 if (!(field = verifier_load_field (ctx, token, &klass, opcode)))
3382 //the value on stack is going to be used as a pointer
3383 is_pointer = stack_slot_get_type (obj) == TYPE_PTR || (stack_slot_get_type (obj) == TYPE_NATIVE_INT && !get_stack_type (&field->parent->byval_arg));
3385 if (field->type->type == MONO_TYPE_TYPEDBYREF) {
3386 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Typedbyref field is an unverfiable type at 0x%04x", ctx->ip_offset));
3389 g_assert (obj->type);
3391 /*The value on the stack must be a subclass of the defining type of the field*/
3392 /* we need to check if we can load the field from the stack value*/
3394 if (stack_slot_get_underlying_type (obj) == TYPE_NATIVE_INT)
3395 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Native int is not a verifiable type to reference a field at 0x%04x", ctx->ip_offset));
3397 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3398 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3400 if (!field->parent->valuetype && stack_slot_is_managed_pointer (obj))
3401 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));
3403 /*a value type can be loaded from a value or a managed pointer, but not a boxed object*/
3404 if (field->parent->valuetype && stack_slot_is_boxed_value (obj))
3405 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));
3407 if (!stack_slot_is_null_literal (obj) && !verify_stack_type_compatibility_full (ctx, &field->parent->byval_arg, obj, TRUE, FALSE)) {
3408 char *found = stack_slot_full_name (obj);
3409 char *expected = mono_type_full_name (&field->parent->byval_arg);
3410 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));
3415 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, mono_class_from_mono_type (obj->type)))
3416 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3419 check_unmanaged_pointer (ctx, obj);
3424 do_push_field (VerifyContext *ctx, int token, gboolean take_addr)
3427 MonoClassField *field;
3430 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3432 if (!check_underflow (ctx, 1))
3434 obj = stack_pop_safe (ctx);
3436 if (!check_is_valid_type_for_field_ops (ctx, token, obj, &field, take_addr ? "ldflda" : "ldfld"))
3439 if (take_addr && field->parent->valuetype && !stack_slot_is_managed_pointer (obj))
3440 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a temporary value-type at 0x%04x", ctx->ip_offset));
3442 if (take_addr && (field->type->attrs & FIELD_ATTRIBUTE_INIT_ONLY) &&
3443 !(field->parent == ctx->method->klass && mono_method_is_constructor (ctx->method)))
3444 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a init-only field at 0x%04x", ctx->ip_offset));
3446 set_stack_value (ctx, stack_push (ctx), field->type, take_addr);
3450 do_store_field (VerifyContext *ctx, int token)
3452 ILStackDesc *value, *obj;
3453 MonoClassField *field;
3454 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3456 if (!check_underflow (ctx, 2))
3459 value = stack_pop (ctx);
3460 obj = stack_pop_safe (ctx);
3462 if (!check_is_valid_type_for_field_ops (ctx, token, obj, &field, "stfld"))
3465 if (!verify_stack_type_compatibility (ctx, field->type, value))
3466 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type %s in field store at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3469 /*TODO proper handle for Nullable<T>*/
3471 do_box_value (VerifyContext *ctx, int klass_token)
3474 MonoType *type = get_boxable_mono_type (ctx, klass_token, "box");
3480 if (!check_underflow (ctx, 1))
3483 value = stack_pop (ctx);
3484 /*box is a nop for reference types*/
3486 if (stack_slot_get_underlying_type (value) == TYPE_COMPLEX && MONO_TYPE_IS_REFERENCE (value->type) && MONO_TYPE_IS_REFERENCE (type)) {
3487 stack_push_stack_val (ctx, value)->stype |= BOXED_MASK;
3492 if (!verify_stack_type_compatibility (ctx, type, value))
3493 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for boxing operation at 0x%04x", ctx->ip_offset));
3495 klass = mono_class_from_mono_type (type);
3496 if (mono_class_is_nullable (klass))
3497 type = &mono_class_get_nullable_param (klass)->byval_arg;
3498 stack_push_val (ctx, TYPE_COMPLEX | BOXED_MASK, type);
3502 do_unbox_value (VerifyContext *ctx, int klass_token)
3505 MonoType *type = get_boxable_mono_type (ctx, klass_token, "unbox");
3510 if (!check_underflow (ctx, 1))
3513 if (!mono_class_from_mono_type (type)->valuetype)
3514 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid reference type for unbox at 0x%04x", ctx->ip_offset));
3516 value = stack_pop (ctx);
3518 /*Value should be: a boxed valuetype or a reference type*/
3519 if (!(stack_slot_get_type (value) == TYPE_COMPLEX &&
3520 (stack_slot_is_boxed_value (value) || !mono_class_from_mono_type (value->type)->valuetype)))
3521 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));
3523 set_stack_value (ctx, value = stack_push (ctx), mono_type_get_type_byref (type), FALSE);
3524 value->stype |= CMMP_MASK;
3528 do_unbox_any (VerifyContext *ctx, int klass_token)
3531 MonoType *type = get_boxable_mono_type (ctx, klass_token, "unbox.any");
3536 if (!check_underflow (ctx, 1))
3539 value = stack_pop (ctx);
3541 /*Value should be: a boxed valuetype or a reference type*/
3542 if (!(stack_slot_get_type (value) == TYPE_COMPLEX &&
3543 (stack_slot_is_boxed_value (value) || !mono_class_from_mono_type (value->type)->valuetype)))
3544 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));
3546 set_stack_value (ctx, stack_push (ctx), type, FALSE);
3550 do_unary_math_op (VerifyContext *ctx, int op)
3553 if (!check_underflow (ctx, 1))
3555 value = stack_pop (ctx);
3556 switch (stack_slot_get_type (value)) {
3559 case TYPE_NATIVE_INT:
3564 case TYPE_COMPLEX: /*only enums are ok*/
3565 if (mono_type_is_enum_type (value->type))
3568 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for unary not at 0x%04x", ctx->ip_offset));
3570 stack_push_stack_val (ctx, value);
3574 do_conversion (VerifyContext *ctx, int kind)
3577 if (!check_underflow (ctx, 1))
3579 value = stack_pop (ctx);
3581 switch (stack_slot_get_type (value)) {
3584 case TYPE_NATIVE_INT:
3588 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));
3593 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3596 stack_push_val (ctx,TYPE_I8, &mono_defaults.int64_class->byval_arg);
3599 stack_push_val (ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
3601 case TYPE_NATIVE_INT:
3602 stack_push_val (ctx, TYPE_NATIVE_INT, &mono_defaults.int_class->byval_arg);
3605 g_error ("unknown type %02x in conversion", kind);
3611 do_load_token (VerifyContext *ctx, int token)
3615 MonoClass *handle_class;
3616 if (!check_overflow (ctx))
3619 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
3620 handle = mono_method_get_wrapper_data (ctx->method, token);
3621 handle_class = (MonoClass *)mono_method_get_wrapper_data (ctx->method, token + 1);
3622 if (handle_class == mono_defaults.typehandle_class)
3623 handle = &((MonoClass*)handle)->byval_arg;
3625 switch (token & 0xff000000) {
3626 case MONO_TOKEN_TYPE_DEF:
3627 case MONO_TOKEN_TYPE_REF:
3628 case MONO_TOKEN_TYPE_SPEC:
3629 case MONO_TOKEN_FIELD_DEF:
3630 case MONO_TOKEN_METHOD_DEF:
3631 case MONO_TOKEN_METHOD_SPEC:
3632 case MONO_TOKEN_MEMBER_REF:
3633 if (!token_bounds_check (ctx->image, token)) {
3634 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));
3639 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));
3643 handle = mono_ldtoken_checked (ctx->image, token, &handle_class, ctx->generic_context, &error);
3647 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)));
3648 mono_error_cleanup (&error);
3651 if (handle_class == mono_defaults.typehandle_class) {
3652 mono_type_is_valid_in_context (ctx, (MonoType*)handle);
3653 } else if (handle_class == mono_defaults.methodhandle_class) {
3654 mono_method_is_valid_in_context (ctx, (MonoMethod*)handle);
3655 } else if (handle_class == mono_defaults.fieldhandle_class) {
3656 mono_type_is_valid_in_context (ctx, &((MonoClassField*)handle)->parent->byval_arg);
3658 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid ldtoken type %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
3660 stack_push_val (ctx, TYPE_COMPLEX, mono_class_get_type (handle_class));
3664 do_ldobj_value (VerifyContext *ctx, int token)
3667 MonoType *type = get_boxable_mono_type (ctx, token, "ldobj");
3668 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3673 if (!check_underflow (ctx, 1))
3676 value = stack_pop (ctx);
3677 if (!stack_slot_is_managed_pointer (value)
3678 && stack_slot_get_type (value) != TYPE_NATIVE_INT
3679 && !(stack_slot_get_type (value) == TYPE_PTR && value->type->type != MONO_TYPE_FNPTR)) {
3680 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid argument %s to ldobj at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3684 if (stack_slot_get_type (value) == TYPE_NATIVE_INT)
3685 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Using native pointer to ldobj at 0x%04x", ctx->ip_offset));
3687 /*We have a byval on the stack, but the comparison must be strict. */
3688 if (!verify_type_compatibility_full (ctx, type, mono_type_get_type_byval (value->type), TRUE))
3689 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldojb operation at 0x%04x", ctx->ip_offset));
3691 set_stack_value (ctx, stack_push (ctx), type, FALSE);
3695 do_stobj (VerifyContext *ctx, int token)
3697 ILStackDesc *dest, *src;
3698 MonoType *type = get_boxable_mono_type (ctx, token, "stobj");
3699 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3704 if (!check_underflow (ctx, 2))
3707 src = stack_pop (ctx);
3708 dest = stack_pop (ctx);
3710 if (stack_slot_is_managed_mutability_pointer (dest))
3711 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with stobj at 0x%04x", ctx->ip_offset));
3713 if (!stack_slot_is_managed_pointer (dest))
3714 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid destination of stobj operation at 0x%04x", ctx->ip_offset));
3716 if (stack_slot_is_boxed_value (src) && !MONO_TYPE_IS_REFERENCE (src->type) && !MONO_TYPE_IS_REFERENCE (type))
3717 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));
3719 if (!verify_stack_type_compatibility (ctx, type, src)) {
3720 char *type_name = mono_type_full_name (type);
3721 char *src_name = stack_slot_full_name (src);
3722 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));
3727 if (!verify_type_compatibility (ctx, mono_type_get_type_byval (dest->type), type))
3728 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Destination and token types of stobj don't match at 0x%04x", ctx->ip_offset));
3732 do_cpobj (VerifyContext *ctx, int token)
3734 ILStackDesc *dest, *src;
3735 MonoType *type = get_boxable_mono_type (ctx, token, "cpobj");
3739 if (!check_underflow (ctx, 2))
3742 src = stack_pop (ctx);
3743 dest = stack_pop (ctx);
3745 if (!stack_slot_is_managed_pointer (src))
3746 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid source of cpobj operation at 0x%04x", ctx->ip_offset));
3748 if (!stack_slot_is_managed_pointer (dest))
3749 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid destination of cpobj operation at 0x%04x", ctx->ip_offset));
3751 if (stack_slot_is_managed_mutability_pointer (dest))
3752 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with cpobj at 0x%04x", ctx->ip_offset));
3754 if (!verify_type_compatibility (ctx, type, mono_type_get_type_byval (src->type)))
3755 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Token and source types of cpobj don't match at 0x%04x", ctx->ip_offset));
3757 if (!verify_type_compatibility (ctx, mono_type_get_type_byval (dest->type), type))
3758 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Destination and token types of cpobj don't match at 0x%04x", ctx->ip_offset));
3762 do_initobj (VerifyContext *ctx, int token)
3765 MonoType *stack, *type = get_boxable_mono_type (ctx, token, "initobj");
3769 if (!check_underflow (ctx, 1))
3772 obj = stack_pop (ctx);
3774 if (!stack_slot_is_managed_pointer (obj))
3775 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid object address for initobj at 0x%04x", ctx->ip_offset));
3777 if (stack_slot_is_managed_mutability_pointer (obj))
3778 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with initobj at 0x%04x", ctx->ip_offset));
3780 stack = mono_type_get_type_byval (obj->type);
3781 if (MONO_TYPE_IS_REFERENCE (stack)) {
3782 if (!verify_type_compatibility (ctx, stack, type))
3783 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type token of initobj not compatible with value on stack at 0x%04x", ctx->ip_offset));
3784 else if (IS_STRICT_MODE (ctx) && !mono_metadata_type_equal (type, stack))
3785 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type token of initobj not compatible with value on stack at 0x%04x", ctx->ip_offset));
3786 } else if (!verify_type_compatibility (ctx, stack, type)) {
3787 char *expected_name = mono_type_full_name (type);
3788 char *stack_name = mono_type_full_name (stack);
3790 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));
3791 g_free (expected_name);
3792 g_free (stack_name);
3797 do_newobj (VerifyContext *ctx, int token)
3801 MonoMethodSignature *sig;
3803 gboolean is_delegate = FALSE;
3805 if (!(method = verifier_load_method (ctx, token, "newobj")))
3808 if (!mono_method_is_constructor (method)) {
3809 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method from token 0x%08x not a constructor at 0x%04x", token, ctx->ip_offset));
3813 if (method->klass->flags & (TYPE_ATTRIBUTE_ABSTRACT | TYPE_ATTRIBUTE_INTERFACE))
3814 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Trying to instantiate an abstract or interface type at 0x%04x", ctx->ip_offset));
3816 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, NULL)) {
3817 char *from = mono_method_full_name (ctx->method, TRUE);
3818 char *to = mono_method_full_name (method, TRUE);
3819 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);
3824 //FIXME use mono_method_get_signature_full
3825 sig = mono_method_signature (method);
3827 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid constructor signature to newobj at 0x%04x", ctx->ip_offset));
3831 if (!sig->hasthis) {
3832 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid constructor signature missing hasthis at 0x%04x", ctx->ip_offset));
3836 if (!check_underflow (ctx, sig->param_count))
3839 is_delegate = method->klass->parent == mono_defaults.multicastdelegate_class;
3842 ILStackDesc *funptr;
3843 //first arg is object, second arg is fun ptr
3844 if (sig->param_count != 2) {
3845 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid delegate constructor at 0x%04x", ctx->ip_offset));
3848 funptr = stack_pop (ctx);
3849 value = stack_pop (ctx);
3850 verify_delegate_compatibility (ctx, method->klass, value, funptr);
3852 for (i = sig->param_count - 1; i >= 0; --i) {
3853 VERIFIER_DEBUG ( printf ("verifying constructor argument %d\n", i); );
3854 value = stack_pop (ctx);
3855 if (!verify_stack_type_compatibility (ctx, sig->params [i], value)) {
3856 char *stack_name = stack_slot_full_name (value);
3857 char *sig_name = mono_type_full_name (sig->params [i]);
3858 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));
3859 g_free (stack_name);
3863 if (stack_slot_is_managed_mutability_pointer (value))
3864 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer as argument of newobj at 0x%04x", ctx->ip_offset));
3868 if (check_overflow (ctx))
3869 set_stack_value (ctx, stack_push (ctx), &method->klass->byval_arg, FALSE);
3873 do_cast (VerifyContext *ctx, int token, const char *opcode) {
3879 if (!check_underflow (ctx, 1))
3882 if (!(type = get_boxable_mono_type (ctx, token, opcode)))
3886 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid %s type at 0x%04x", opcode, ctx->ip_offset));
3890 value = stack_pop (ctx);
3891 is_boxed = stack_slot_is_boxed_value (value);
3893 if (stack_slot_is_managed_pointer (value))
3894 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value for %s at 0x%04x", opcode, ctx->ip_offset));
3895 else if (!MONO_TYPE_IS_REFERENCE (value->type) && !is_boxed) {
3896 char *name = stack_slot_full_name (value);
3897 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));
3901 switch (value->type->type) {
3902 case MONO_TYPE_FNPTR:
3904 case MONO_TYPE_TYPEDBYREF:
3905 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value for %s at 0x%04x", opcode, ctx->ip_offset));
3910 do_box = is_boxed || mono_type_is_generic_argument(type) || mono_class_from_mono_type (type)->valuetype;
3911 stack_push_val (ctx, TYPE_COMPLEX | (do_box ? BOXED_MASK : 0), type);
3915 mono_type_from_opcode (int opcode) {
3923 return &mono_defaults.sbyte_class->byval_arg;
3931 return &mono_defaults.int16_class->byval_arg;
3939 return &mono_defaults.int32_class->byval_arg;
3945 return &mono_defaults.int64_class->byval_arg;
3951 return &mono_defaults.single_class->byval_arg;
3957 return &mono_defaults.double_class->byval_arg;
3963 return &mono_defaults.int_class->byval_arg;
3967 case CEE_LDELEM_REF:
3968 case CEE_STELEM_REF:
3969 return &mono_defaults.object_class->byval_arg;
3972 g_error ("unknown opcode %02x in mono_type_from_opcode ", opcode);
3978 do_load_indirect (VerifyContext *ctx, int opcode)
3981 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3983 if (!check_underflow (ctx, 1))
3986 value = stack_pop (ctx);
3987 if (!stack_slot_is_managed_pointer (value)) {
3988 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Load indirect not using a manager pointer at 0x%04x", ctx->ip_offset));
3989 set_stack_value (ctx, stack_push (ctx), mono_type_from_opcode (opcode), FALSE);
3993 if (opcode == CEE_LDIND_REF) {
3994 if (stack_slot_get_underlying_type (value) != TYPE_COMPLEX || mono_class_from_mono_type (value->type)->valuetype)
3995 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldind_ref expected object byref operation at 0x%04x", ctx->ip_offset));
3996 set_stack_value (ctx, stack_push (ctx), mono_type_get_type_byval (value->type), FALSE);
3998 if (!verify_type_compatibility_full (ctx, mono_type_from_opcode (opcode), mono_type_get_type_byval (value->type), TRUE))
3999 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
4000 set_stack_value (ctx, stack_push (ctx), mono_type_from_opcode (opcode), FALSE);
4005 do_store_indirect (VerifyContext *ctx, int opcode)
4007 ILStackDesc *addr, *val;
4008 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
4010 if (!check_underflow (ctx, 2))
4013 val = stack_pop (ctx);
4014 addr = stack_pop (ctx);
4016 check_unmanaged_pointer (ctx, addr);
4018 if (!stack_slot_is_managed_pointer (addr) && stack_slot_get_type (addr) != TYPE_PTR) {
4019 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid non-pointer argument to stind at 0x%04x", ctx->ip_offset));
4023 if (stack_slot_is_managed_mutability_pointer (addr)) {
4024 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with stind at 0x%04x", ctx->ip_offset));
4028 if (!verify_type_compatibility_full (ctx, mono_type_from_opcode (opcode), mono_type_get_type_byval (addr->type), TRUE))
4029 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid addr type at stack for stind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
4031 if (!verify_stack_type_compatibility (ctx, mono_type_from_opcode (opcode), val))
4032 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value type at stack for stind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
4036 do_newarr (VerifyContext *ctx, int token)
4039 MonoType *type = get_boxable_mono_type (ctx, token, "newarr");
4044 if (!check_underflow (ctx, 1))
4047 value = stack_pop (ctx);
4048 if (stack_slot_get_type (value) != TYPE_I4 && stack_slot_get_type (value) != TYPE_NATIVE_INT)
4049 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));
4051 set_stack_value (ctx, stack_push (ctx), mono_class_get_type (mono_array_class_get (mono_class_from_mono_type (type), 1)), FALSE);
4054 /*FIXME handle arrays that are not 0-indexed*/
4056 do_ldlen (VerifyContext *ctx)
4060 if (!check_underflow (ctx, 1))
4063 value = stack_pop (ctx);
4065 if (stack_slot_get_type (value) != TYPE_COMPLEX || value->type->type != MONO_TYPE_SZARRAY)
4066 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type for ldlen at 0x%04x", ctx->ip_offset));
4068 stack_push_val (ctx, TYPE_NATIVE_INT, &mono_defaults.int_class->byval_arg);
4071 /*FIXME handle arrays that are not 0-indexed*/
4072 /*FIXME handle readonly prefix and CMMP*/
4074 do_ldelema (VerifyContext *ctx, int klass_token)
4076 ILStackDesc *index, *array, *res;
4077 MonoType *type = get_boxable_mono_type (ctx, klass_token, "ldelema");
4083 if (!check_underflow (ctx, 2))
4086 index = stack_pop (ctx);
4087 array = stack_pop (ctx);
4089 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4090 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));
4092 if (!stack_slot_is_null_literal (array)) {
4093 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY)
4094 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type(%s) for ldelema at 0x%04x", stack_slot_get_name (array), ctx->ip_offset));
4096 if (get_stack_type (type) == TYPE_I4 || get_stack_type (type) == TYPE_NATIVE_INT) {
4097 valid = verify_type_compatibility_full (ctx, type, &array->type->data.klass->byval_arg, TRUE);
4099 valid = mono_metadata_type_equal (type, &array->type->data.klass->byval_arg);
4102 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelema at 0x%04x", ctx->ip_offset));
4106 res = stack_push (ctx);
4107 set_stack_value (ctx, res, type, TRUE);
4108 if (ctx->prefix_set & PREFIX_READONLY) {
4109 ctx->prefix_set &= ~PREFIX_READONLY;
4110 res->stype |= CMMP_MASK;
4115 * FIXME handle arrays that are not 0-indexed
4116 * FIXME handle readonly prefix and CMMP
4119 do_ldelem (VerifyContext *ctx, int opcode, int token)
4121 #define IS_ONE_OF2(T, A, B) (T == A || T == B)
4122 ILStackDesc *index, *array;
4124 if (!check_underflow (ctx, 2))
4127 if (opcode == CEE_LDELEM) {
4128 if (!(type = verifier_load_type (ctx, token, "ldelem.any"))) {
4129 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Type (0x%08x) not found at 0x%04x", token, ctx->ip_offset));
4133 type = mono_type_from_opcode (opcode);
4136 index = stack_pop (ctx);
4137 array = stack_pop (ctx);
4139 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4140 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));
4142 if (!stack_slot_is_null_literal (array)) {
4143 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY)
4144 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));
4146 if (opcode == CEE_LDELEM_REF) {
4147 if (array->type->data.klass->valuetype)
4148 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type is not a reference type for ldelem.ref 0x%04x", ctx->ip_offset));
4149 type = &array->type->data.klass->byval_arg;
4151 MonoType *candidate = &array->type->data.klass->byval_arg;
4152 if (IS_STRICT_MODE (ctx)) {
4153 MonoType *underlying_type = mono_type_get_underlying_type_any (type);
4154 MonoType *underlying_candidate = mono_type_get_underlying_type_any (candidate);
4155 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)) ||
4156 (IS_ONE_OF2 (underlying_candidate->type, MONO_TYPE_I4, MONO_TYPE_U4) && IS_ONE_OF2 (underlying_type->type, MONO_TYPE_I, MONO_TYPE_U)))
4157 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelem.X at 0x%04x", ctx->ip_offset));
4159 if (!verify_type_compatibility_full (ctx, type, candidate, TRUE))
4160 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelem.X at 0x%04x", ctx->ip_offset));
4165 set_stack_value (ctx, stack_push (ctx), type, FALSE);
4170 * FIXME handle arrays that are not 0-indexed
4173 do_stelem (VerifyContext *ctx, int opcode, int token)
4175 ILStackDesc *index, *array, *value;
4177 if (!check_underflow (ctx, 3))
4180 if (opcode == CEE_STELEM) {
4181 if (!(type = verifier_load_type (ctx, token, "stelem.any"))) {
4182 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Type (0x%08x) not found at 0x%04x", token, ctx->ip_offset));
4186 type = mono_type_from_opcode (opcode);
4189 value = stack_pop (ctx);
4190 index = stack_pop (ctx);
4191 array = stack_pop (ctx);
4193 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4194 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));
4196 if (!stack_slot_is_null_literal (array)) {
4197 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY) {
4198 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));
4200 if (opcode == CEE_STELEM_REF) {
4201 if (array->type->data.klass->valuetype)
4202 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type is not a reference type for stelem.ref 0x%04x", ctx->ip_offset));
4203 } else if (!verify_type_compatibility_full (ctx, &array->type->data.klass->byval_arg, type, TRUE)) {
4204 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for stdelem.X at 0x%04x", ctx->ip_offset));
4208 if (opcode == CEE_STELEM_REF) {
4209 if (!stack_slot_is_boxed_value (value) && mono_class_from_mono_type (value->type)->valuetype)
4210 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value is not a reference type for stelem.ref 0x%04x", ctx->ip_offset));
4211 } else if (opcode != CEE_STELEM_REF) {
4212 if (!verify_stack_type_compatibility (ctx, type, value))
4213 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value on stack for stdelem.X at 0x%04x", ctx->ip_offset));
4215 if (stack_slot_is_boxed_value (value) && !MONO_TYPE_IS_REFERENCE (value->type) && !MONO_TYPE_IS_REFERENCE (type))
4216 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));
4222 do_throw (VerifyContext *ctx)
4224 ILStackDesc *exception;
4225 if (!check_underflow (ctx, 1))
4227 exception = stack_pop (ctx);
4229 if (!stack_slot_is_null_literal (exception) && !(stack_slot_get_type (exception) == TYPE_COMPLEX && !mono_class_from_mono_type (exception->type)->valuetype))
4230 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type on stack for throw, expected reference type at 0x%04x", ctx->ip_offset));
4232 if (mono_type_is_generic_argument (exception->type) && !stack_slot_is_boxed_value (exception)) {
4233 char *name = mono_type_full_name (exception->type);
4234 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));
4237 /*The stack is left empty after a throw*/
4243 do_endfilter (VerifyContext *ctx)
4245 MonoExceptionClause *clause;
4247 if (IS_STRICT_MODE (ctx)) {
4248 if (ctx->eval.size != 1)
4249 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack size must have one item for endfilter at 0x%04x", ctx->ip_offset));
4251 if (ctx->eval.size >= 1 && stack_slot_get_type (stack_pop (ctx)) != TYPE_I4)
4252 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack item type is not an int32 for endfilter at 0x%04x", ctx->ip_offset));
4255 if ((clause = is_correct_endfilter (ctx, ctx->ip_offset))) {
4256 if (IS_STRICT_MODE (ctx)) {
4257 if (ctx->ip_offset != clause->handler_offset - 2)
4258 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter is not the last instruction of the filter clause at 0x%04x", ctx->ip_offset));
4260 if ((ctx->ip_offset != clause->handler_offset - 2) && !MONO_OFFSET_IN_HANDLER (clause, ctx->ip_offset))
4261 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter is not the last instruction of the filter clause at 0x%04x", ctx->ip_offset));
4264 if (IS_STRICT_MODE (ctx) && !is_unverifiable_endfilter (ctx, ctx->ip_offset))
4265 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter outside filter clause at 0x%04x", ctx->ip_offset));
4267 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("endfilter outside filter clause at 0x%04x", ctx->ip_offset));
4274 do_leave (VerifyContext *ctx, int delta)
4276 int target = ((gint32)ctx->ip_offset) + delta;
4277 if (target >= ctx->code_size || target < 0)
4278 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target out of code at 0x%04x", ctx->ip_offset));
4280 if (!is_correct_leave (ctx->header, ctx->ip_offset, target))
4281 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Leave not allowed in finally block at 0x%04x", ctx->ip_offset));
4283 ctx->target = target;
4289 * Verify br and br.s opcodes.
4292 do_static_branch (VerifyContext *ctx, int delta)
4294 int target = ctx->ip_offset + delta;
4295 if (target < 0 || target >= ctx->code_size) {
4296 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("branch target out of code at 0x%04x", ctx->ip_offset));
4300 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
4302 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
4305 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
4309 ctx->target = target;
4313 do_switch (VerifyContext *ctx, int count, const unsigned char *data)
4315 int i, base = ctx->ip_offset + 5 + count * 4;
4318 if (!check_underflow (ctx, 1))
4321 value = stack_pop (ctx);
4323 if (stack_slot_get_type (value) != TYPE_I4 && stack_slot_get_type (value) != TYPE_NATIVE_INT)
4324 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid argument to switch at 0x%04x", ctx->ip_offset));
4326 for (i = 0; i < count; ++i) {
4327 int target = base + read32 (data + i * 4);
4329 if (target < 0 || target >= ctx->code_size) {
4330 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Switch target %x out of code at 0x%04x", i, ctx->ip_offset));
4334 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
4336 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Switch target %x escapes out of exception block at 0x%04x", i, ctx->ip_offset));
4339 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Switch target %x escapes out of exception block at 0x%04x", i, ctx->ip_offset));
4342 merge_stacks (ctx, &ctx->eval, &ctx->code [target], FALSE, TRUE);
4347 do_load_function_ptr (VerifyContext *ctx, guint32 token, gboolean virtual_)
4352 if (virtual_ && !check_underflow (ctx, 1))
4355 if (!virtual_ && !check_overflow (ctx))
4358 if (ctx->method->wrapper_type != MONO_WRAPPER_NONE) {
4359 method = (MonoMethod *)mono_method_get_wrapper_data (ctx->method, (guint32)token);
4361 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid token %x for ldftn at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4365 if (!IS_METHOD_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
4366 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid token %x for ldftn at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4370 if (!(method = verifier_load_method (ctx, token, virtual_ ? "ldvirtfrn" : "ldftn")))
4374 if (mono_method_is_constructor (method))
4375 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use ldftn with a constructor at 0x%04x", ctx->ip_offset));
4378 ILStackDesc *top = stack_pop (ctx);
4380 if (stack_slot_get_type (top) != TYPE_COMPLEX || top->type->type == MONO_TYPE_VALUETYPE)
4381 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid argument to ldvirtftn at 0x%04x", ctx->ip_offset));
4383 if (method->flags & METHOD_ATTRIBUTE_STATIC)
4384 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use ldvirtftn with a constructor at 0x%04x", ctx->ip_offset));
4386 if (!verify_stack_type_compatibility (ctx, &method->klass->byval_arg, top))
4387 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unexpected object for ldvirtftn at 0x%04x", ctx->ip_offset));
4390 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, NULL))
4391 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);
4393 top = stack_push_val(ctx, TYPE_PTR, mono_type_create_fnptr_from_mono_method (ctx, method));
4394 top->method = method;
4398 do_sizeof (VerifyContext *ctx, int token)
4402 if (!(type = verifier_load_type (ctx, token, "sizeof")))
4405 if (type->byref && type->type != MONO_TYPE_TYPEDBYREF) {
4406 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of byref type at 0x%04x", ctx->ip_offset));
4410 if (type->type == MONO_TYPE_VOID) {
4411 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of void type at 0x%04x", ctx->ip_offset));
4415 if (check_overflow (ctx))
4416 set_stack_value (ctx, stack_push (ctx), &mono_defaults.uint32_class->byval_arg, FALSE);
4419 /* Stack top can be of any type, the runtime doesn't care and treat everything as an int. */
4421 do_localloc (VerifyContext *ctx)
4423 if (ctx->eval.size != 1) {
4424 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack must have only size item in localloc at 0x%04x", ctx->ip_offset));
4428 if (in_any_exception_block (ctx->header, ctx->ip_offset)) {
4429 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack must have only size item in localloc at 0x%04x", ctx->ip_offset));
4433 /*TODO verify top type*/
4434 /* top = */ stack_pop (ctx);
4436 set_stack_value (ctx, stack_push (ctx), &mono_defaults.int_class->byval_arg, FALSE);
4437 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Instruction localloc in never verifiable at 0x%04x", ctx->ip_offset));
4441 do_ldstr (VerifyContext *ctx, guint32 token)
4443 GSList *error = NULL;
4444 if (ctx->method->wrapper_type == MONO_WRAPPER_NONE && !image_is_dynamic (ctx->image)) {
4445 if (mono_metadata_token_code (token) != MONO_TOKEN_STRING) {
4446 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid string token %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4450 if (!mono_verifier_verify_string_signature (ctx->image, mono_metadata_token_index (token), &error)) {
4452 ctx->list = g_slist_concat (ctx->list, error);
4453 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid string index %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4458 if (check_overflow (ctx))
4459 stack_push_val (ctx, TYPE_COMPLEX, &mono_defaults.string_class->byval_arg);
4463 do_refanyval (VerifyContext *ctx, int token)
4467 if (!check_underflow (ctx, 1))
4470 if (!(type = get_boxable_mono_type (ctx, token, "refanyval")))
4473 top = stack_pop (ctx);
4475 if (top->stype != TYPE_PTR || top->type->type != MONO_TYPE_TYPEDBYREF)
4476 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));
4478 set_stack_value (ctx, stack_push (ctx), type, TRUE);
4482 do_refanytype (VerifyContext *ctx)
4486 if (!check_underflow (ctx, 1))
4489 top = stack_pop (ctx);
4491 if (top->stype != TYPE_PTR || top->type->type != MONO_TYPE_TYPEDBYREF)
4492 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));
4494 set_stack_value (ctx, stack_push (ctx), &mono_defaults.typehandle_class->byval_arg, FALSE);
4499 do_mkrefany (VerifyContext *ctx, int token)
4503 if (!check_underflow (ctx, 1))
4506 if (!(type = get_boxable_mono_type (ctx, token, "refanyval")))
4509 top = stack_pop (ctx);
4511 if (stack_slot_is_managed_mutability_pointer (top))
4512 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with mkrefany at 0x%04x", ctx->ip_offset));
4514 if (!stack_slot_is_managed_pointer (top)) {
4515 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));
4517 MonoType *stack_type = mono_type_get_type_byval (top->type);
4518 if (MONO_TYPE_IS_REFERENCE (type) && !mono_metadata_type_equal (type, stack_type))
4519 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type not compatible for mkrefany at 0x%04x", ctx->ip_offset));
4521 if (!MONO_TYPE_IS_REFERENCE (type) && !verify_type_compatibility_full (ctx, type, stack_type, TRUE))
4522 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type not compatible for mkrefany at 0x%04x", ctx->ip_offset));
4525 set_stack_value (ctx, stack_push (ctx), &mono_defaults.typed_reference_class->byval_arg, FALSE);
4529 do_ckfinite (VerifyContext *ctx)
4532 if (!check_underflow (ctx, 1))
4535 top = stack_pop (ctx);
4537 if (stack_slot_get_underlying_type (top) != TYPE_R8)
4538 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));
4539 stack_push_stack_val (ctx, top);
4543 * Merge the stacks and perform compat checks. The merge check if types of @from are mergeable with type of @to
4545 * @from holds new values for a given control path
4546 * @to holds the current values of a given control path
4548 * TODO we can eliminate the from argument as all callers pass &ctx->eval
4551 merge_stacks (VerifyContext *ctx, ILCodeDesc *from, ILCodeDesc *to, gboolean start, gboolean external)
4555 stack_init (ctx, to);
4558 if (to->flags == IL_CODE_FLAG_NOT_PROCESSED)
4561 stack_copy (&ctx->eval, to);
4563 } else if (!(to->flags & IL_CODE_STACK_MERGED)) {
4564 stack_copy (to, &ctx->eval);
4567 VERIFIER_DEBUG ( printf ("performing stack merge %d x %d\n", from->size, to->size); );
4569 if (from->size != to->size) {
4570 VERIFIER_DEBUG ( printf ("different stack sizes %d x %d at 0x%04x\n", from->size, to->size, ctx->ip_offset); );
4571 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));
4575 //FIXME we need to preserve CMMP attributes
4576 //FIXME we must take null literals into consideration.
4577 for (i = 0; i < from->size; ++i) {
4578 ILStackDesc *new_slot = from->stack + i;
4579 ILStackDesc *old_slot = to->stack + i;
4580 MonoType *new_type = mono_type_from_stack_slot (new_slot);
4581 MonoType *old_type = mono_type_from_stack_slot (old_slot);
4582 MonoClass *old_class = mono_class_from_mono_type (old_type);
4583 MonoClass *new_class = mono_class_from_mono_type (new_type);
4584 MonoClass *match_class = NULL;
4586 // S := T then U = S (new value is compatible with current value, keep current)
4587 if (verify_stack_type_compatibility (ctx, old_type, new_slot)) {
4588 copy_stack_value (new_slot, old_slot);
4592 // T := S then U = T (old value is compatible with current value, use new)
4593 if (verify_stack_type_compatibility (ctx, new_type, old_slot)) {
4594 copy_stack_value (old_slot, new_slot);
4598 /*Both slots are the same boxed valuetype. Simply copy it.*/
4599 if (stack_slot_is_boxed_value (old_slot) &&
4600 stack_slot_is_boxed_value (new_slot) &&
4601 mono_metadata_type_equal (old_type, new_type)) {
4602 copy_stack_value (new_slot, old_slot);
4606 if (mono_type_is_generic_argument (old_type) || mono_type_is_generic_argument (new_type)) {
4607 char *old_name = stack_slot_full_name (old_slot);
4608 char *new_name = stack_slot_full_name (new_slot);
4609 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));
4615 //both are reference types, use closest common super type
4616 if (!mono_class_from_mono_type (old_type)->valuetype
4617 && !mono_class_from_mono_type (new_type)->valuetype
4618 && !stack_slot_is_managed_pointer (old_slot)
4619 && !stack_slot_is_managed_pointer (new_slot)) {
4621 mono_class_setup_supertypes (old_class);
4622 mono_class_setup_supertypes (new_class);
4624 for (j = MIN (old_class->idepth, new_class->idepth) - 1; j > 0; --j) {
4625 if (mono_metadata_type_equal (&old_class->supertypes [j]->byval_arg, &new_class->supertypes [j]->byval_arg)) {
4626 match_class = old_class->supertypes [j];
4631 mono_class_setup_interfaces (old_class, &error);
4632 if (!mono_error_ok (&error)) {
4633 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));
4634 mono_error_cleanup (&error);
4637 mono_class_setup_interfaces (new_class, &error);
4638 if (!mono_error_ok (&error)) {
4639 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));
4640 mono_error_cleanup (&error);
4644 /* if old class is an interface that new class implements */
4645 if (old_class->flags & TYPE_ATTRIBUTE_INTERFACE) {
4646 if (verifier_class_is_assignable_from (old_class, new_class)) {
4647 match_class = old_class;
4650 for (j = 0; j < old_class->interface_count; ++j) {
4651 if (verifier_class_is_assignable_from (old_class->interfaces [j], new_class)) {
4652 match_class = old_class->interfaces [j];
4658 if (new_class->flags & TYPE_ATTRIBUTE_INTERFACE) {
4659 if (verifier_class_is_assignable_from (new_class, old_class)) {
4660 match_class = new_class;
4663 for (j = 0; j < new_class->interface_count; ++j) {
4664 if (verifier_class_is_assignable_from (new_class->interfaces [j], old_class)) {
4665 match_class = new_class->interfaces [j];
4671 //No decent super type found, use object
4672 match_class = mono_defaults.object_class;
4674 } 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)) {
4675 match_class = mono_defaults.object_class;
4680 char *old_name = stack_slot_full_name (old_slot);
4681 char *new_name = stack_slot_full_name (new_slot);
4682 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));
4686 set_stack_value (ctx, old_slot, &new_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4690 g_assert (match_class);
4691 set_stack_value (ctx, old_slot, &match_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4692 set_stack_value (ctx, new_slot, &match_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4698 to->flags |= IL_CODE_FLAG_WAS_TARGET;
4699 to->flags |= IL_CODE_STACK_MERGED;
4702 #define HANDLER_START(clause) ((clause)->flags == MONO_EXCEPTION_CLAUSE_FILTER ? (clause)->data.filter_offset : clause->handler_offset)
4703 #define IS_CATCH_OR_FILTER(clause) ((clause)->flags == MONO_EXCEPTION_CLAUSE_FILTER || (clause)->flags == MONO_EXCEPTION_CLAUSE_NONE)
4706 * is_clause_in_range :
4708 * Returns TRUE if either the protected block or the handler of @clause is in the @start - @end range.
4711 is_clause_in_range (MonoExceptionClause *clause, guint32 start, guint32 end)
4713 if (clause->try_offset >= start && clause->try_offset < end)
4715 if (HANDLER_START (clause) >= start && HANDLER_START (clause) < end)
4721 * is_clause_inside_range :
4723 * Returns TRUE if @clause lies completely inside the @start - @end range.
4726 is_clause_inside_range (MonoExceptionClause *clause, guint32 start, guint32 end)
4728 if (clause->try_offset < start || (clause->try_offset + clause->try_len) > end)
4730 if (HANDLER_START (clause) < start || (clause->handler_offset + clause->handler_len) > end)
4736 * is_clause_nested :
4738 * Returns TRUE if @nested is nested in @clause.
4741 is_clause_nested (MonoExceptionClause *clause, MonoExceptionClause *nested)
4743 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER && is_clause_inside_range (nested, clause->data.filter_offset, clause->handler_offset))
4745 return is_clause_inside_range (nested, clause->try_offset, clause->try_offset + clause->try_len) ||
4746 is_clause_inside_range (nested, clause->handler_offset, clause->handler_offset + clause->handler_len);
4749 /* Test the relationship between 2 exception clauses. Follow P.1 12.4.2.7 of ECMA
4750 * the each pair of exception must have the following properties:
4751 * - one is fully nested on another (the outer must not be a filter clause) (the nested one must come earlier)
4752 * - completely disjoin (none of the 3 regions of each entry overlap with the other 3)
4753 * - mutual protection (protected block is EXACT the same, handlers are disjoin and all handler are catch or all handler are filter)
4756 verify_clause_relationship (VerifyContext *ctx, MonoExceptionClause *clause, MonoExceptionClause *to_test)
4758 /*clause is nested*/
4759 if (to_test->flags == MONO_EXCEPTION_CLAUSE_FILTER && is_clause_inside_range (clause, to_test->data.filter_offset, to_test->handler_offset)) {
4760 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clause inside filter"));
4764 /*wrong nesting order.*/
4765 if (is_clause_nested (clause, to_test)) {
4766 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Nested exception clause appears after enclosing clause"));
4770 /*mutual protection*/
4771 if (clause->try_offset == to_test->try_offset && clause->try_len == to_test->try_len) {
4772 /*handlers are not disjoint*/
4773 if (is_clause_in_range (to_test, HANDLER_START (clause), clause->handler_offset + clause->handler_len)) {
4774 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception handlers overlap"));
4777 /* handlers are not catch or filter */
4778 if (!IS_CATCH_OR_FILTER (clause) || !IS_CATCH_OR_FILTER (to_test)) {
4779 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clauses with shared protected block are neither catch or filter"));
4786 /*not completelly disjoint*/
4787 if ((is_clause_in_range (to_test, clause->try_offset, clause->try_offset + clause->try_len) ||
4788 is_clause_in_range (to_test, HANDLER_START (clause), clause->handler_offset + clause->handler_len)) && !is_clause_nested (to_test, clause))
4789 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clauses overlap"));
4792 #define code_bounds_check(size) \
4793 if (ADDP_IS_GREATER_OR_OVF (ip, size, end)) {\
4794 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Code overrun starting with 0x%x at 0x%04x", *ip, ctx.ip_offset)); \
4799 mono_opcode_is_prefix (int op)
4802 case MONO_CEE_UNALIGNED_:
4803 case MONO_CEE_VOLATILE_:
4804 case MONO_CEE_TAIL_:
4805 case MONO_CEE_CONSTRAINED_:
4806 case MONO_CEE_READONLY_:
4813 * FIXME: need to distinguish between valid and verifiable.
4814 * Need to keep track of types on the stack.
4815 * Verify types for opcodes.
4818 mono_method_verify (MonoMethod *method, int level)
4821 const unsigned char *ip, *code_start;
4822 const unsigned char *end;
4823 MonoSimpleBasicBlock *bb = NULL, *original_bb = NULL;
4825 int i, n, need_merge = 0, start = 0;
4826 guint ip_offset = 0, prefix = 0;
4827 MonoGenericContext *generic_context = NULL;
4831 VERIFIER_DEBUG ( printf ("Verify IL for method %s %s %s\n", method->klass->name_space, method->klass->name, method->name); );
4833 init_verifier_stats ();
4835 if (method->iflags & (METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL | METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
4836 (method->flags & (METHOD_ATTRIBUTE_PINVOKE_IMPL | METHOD_ATTRIBUTE_ABSTRACT))) {
4840 memset (&ctx, 0, sizeof (VerifyContext));
4842 //FIXME use mono_method_get_signature_full
4843 ctx.signature = mono_method_signature (method);
4844 if (!ctx.signature) {
4845 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Could not decode method signature"));
4847 finish_collect_stats ();
4850 if (!method->is_generic && !method->klass->is_generic && ctx.signature->has_type_parameters) {
4851 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Method and signature don't match in terms of genericity"));
4852 finish_collect_stats ();
4856 ctx.header = mono_method_get_header_checked (method, &error);
4858 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Could not decode method header due to %s", mono_error_get_message (&error)));
4859 mono_error_cleanup (&error);
4860 finish_collect_stats ();
4863 ctx.method = method;
4864 code_start = ip = ctx.header->code;
4865 end = ip + ctx.header->code_size;
4866 ctx.image = image = method->klass->image;
4869 ctx.max_args = ctx.signature->param_count + ctx.signature->hasthis;
4870 ctx.max_stack = ctx.header->max_stack;
4871 ctx.verifiable = ctx.valid = 1;
4874 ctx.code = g_new (ILCodeDesc, ctx.header->code_size);
4875 ctx.code_size = ctx.header->code_size;
4876 _MEM_ALLOC (sizeof (ILCodeDesc) * ctx.header->code_size);
4878 memset(ctx.code, 0, sizeof (ILCodeDesc) * ctx.header->code_size);
4880 ctx.num_locals = ctx.header->num_locals;
4881 ctx.locals = (MonoType **)g_memdup (ctx.header->locals, sizeof (MonoType*) * ctx.header->num_locals);
4882 _MEM_ALLOC (sizeof (MonoType*) * ctx.header->num_locals);
4884 if (ctx.num_locals > 0 && !ctx.header->init_locals)
4885 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Method with locals variable but without init locals set"));
4887 ctx.params = g_new (MonoType*, ctx.max_args);
4888 _MEM_ALLOC (sizeof (MonoType*) * ctx.max_args);
4890 if (ctx.signature->hasthis)
4891 ctx.params [0] = method->klass->valuetype ? &method->klass->this_arg : &method->klass->byval_arg;
4892 memcpy (ctx.params + ctx.signature->hasthis, ctx.signature->params, sizeof (MonoType *) * ctx.signature->param_count);
4894 if (ctx.signature->is_inflated)
4895 ctx.generic_context = generic_context = mono_method_get_context (method);
4897 if (!generic_context && (method->klass->generic_container || method->is_generic)) {
4898 if (method->is_generic)
4899 ctx.generic_context = generic_context = &(mono_method_get_generic_container (method)->context);
4901 ctx.generic_context = generic_context = &method->klass->generic_container->context;
4904 for (i = 0; i < ctx.num_locals; ++i) {
4905 MonoType *uninflated = ctx.locals [i];
4906 ctx.locals [i] = mono_class_inflate_generic_type_checked (ctx.locals [i], ctx.generic_context, &error);
4907 if (!mono_error_ok (&error)) {
4908 char *name = mono_type_full_name (ctx.locals [i] ? ctx.locals [i] : uninflated);
4909 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid local %d of type %s", i, name));
4911 mono_error_cleanup (&error);
4912 /* we must not free (in cleanup) what was not yet allocated (but only copied) */
4918 for (i = 0; i < ctx.max_args; ++i) {
4919 MonoType *uninflated = ctx.params [i];
4920 ctx.params [i] = mono_class_inflate_generic_type_checked (ctx.params [i], ctx.generic_context, &error);
4921 if (!mono_error_ok (&error)) {
4922 char *name = mono_type_full_name (ctx.params [i] ? ctx.params [i] : uninflated);
4923 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid parameter %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) */
4931 stack_init (&ctx, &ctx.eval);
4933 for (i = 0; i < ctx.num_locals; ++i) {
4934 if (!mono_type_is_valid_in_context (&ctx, ctx.locals [i]))
4936 if (get_stack_type (ctx.locals [i]) == TYPE_INV) {
4937 char *name = mono_type_full_name (ctx.locals [i]);
4938 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid local %i of type %s", i, name));
4945 for (i = 0; i < ctx.max_args; ++i) {
4946 if (!mono_type_is_valid_in_context (&ctx, ctx.params [i]))
4949 if (get_stack_type (ctx.params [i]) == TYPE_INV) {
4950 char *name = mono_type_full_name (ctx.params [i]);
4951 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid parameter %i of type %s", i, name));
4960 for (i = 0; i < ctx.header->num_clauses && ctx.valid; ++i) {
4961 MonoExceptionClause *clause = ctx.header->clauses + i;
4962 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); );
4964 if (clause->try_offset > ctx.code_size || ADD_IS_GREATER_OR_OVF (clause->try_offset, clause->try_len, ctx.code_size))
4965 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try clause out of bounds at 0x%04x", clause->try_offset));
4967 if (clause->try_len <= 0)
4968 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try clause len <= 0 at 0x%04x", clause->try_offset));
4970 if (clause->handler_offset > ctx.code_size || ADD_IS_GREATER_OR_OVF (clause->handler_offset, clause->handler_len, ctx.code_size))
4971 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("handler clause out of bounds at 0x%04x", clause->try_offset));
4973 if (clause->handler_len <= 0)
4974 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("handler clause len <= 0 at 0x%04x", clause->try_offset));
4976 if (clause->try_offset < clause->handler_offset && ADD_IS_GREATER_OR_OVF (clause->try_offset, clause->try_len, HANDLER_START (clause)))
4977 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try block (at 0x%04x) includes handler block (at 0x%04x)", clause->try_offset, clause->handler_offset));
4979 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
4980 if (clause->data.filter_offset > ctx.code_size)
4981 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("filter clause out of bounds at 0x%04x", clause->try_offset));
4983 if (clause->data.filter_offset >= clause->handler_offset)
4984 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("filter clause must come before the handler clause at 0x%04x", clause->data.filter_offset));
4987 for (n = i + 1; n < ctx.header->num_clauses && ctx.valid; ++n)
4988 verify_clause_relationship (&ctx, clause, ctx.header->clauses + n);
4993 ctx.code [clause->try_offset].flags |= IL_CODE_FLAG_WAS_TARGET;
4994 if (clause->try_offset + clause->try_len < ctx.code_size)
4995 ctx.code [clause->try_offset + clause->try_len].flags |= IL_CODE_FLAG_WAS_TARGET;
4996 if (clause->handler_offset + clause->handler_len < ctx.code_size)
4997 ctx.code [clause->handler_offset + clause->handler_len].flags |= IL_CODE_FLAG_WAS_TARGET;
4999 if (clause->flags == MONO_EXCEPTION_CLAUSE_NONE) {
5000 if (!clause->data.catch_class) {
5001 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Catch clause %d with invalid type", i));
5004 if (!mono_type_is_valid_in_context (&ctx, &clause->data.catch_class->byval_arg))
5007 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->handler_offset, clause->data.catch_class);
5009 else if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
5010 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->data.filter_offset, mono_defaults.exception_class);
5011 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->handler_offset, mono_defaults.exception_class);
5018 original_bb = bb = mono_basic_block_split (method, &error, ctx.header);
5019 if (!mono_error_ok (&error)) {
5020 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid branch target: %s", mono_error_get_message (&error)));
5021 mono_error_cleanup (&error);
5026 while (ip < end && ctx.valid) {
5028 ip_offset = (guint) (ip - code_start);
5030 const unsigned char *ip_copy = ip;
5033 if (ip_offset > bb->end) {
5034 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or EH block at [0x%04x] targets middle instruction at 0x%04x", bb->end, ip_offset));
5038 if (ip_offset == bb->end)
5041 op_size = mono_opcode_value_and_size (&ip_copy, end, &op);
5042 if (op_size == -1) {
5043 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction %x at 0x%04x", *ip, ip_offset));
5047 if (ADD_IS_GREATER_OR_OVF (ip_offset, op_size, bb->end)) {
5048 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or EH block targets middle of instruction at 0x%04x", ip_offset));
5052 /*Last Instruction*/
5053 if (ip_offset + op_size == bb->end && mono_opcode_is_prefix (op)) {
5054 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));
5059 ctx.ip_offset = ip_offset = (guint) (ip - code_start);
5061 /*We need to check against fallthrou in and out of protected blocks.
5062 * For fallout we check the once a protected block ends, if the start flag is not set.
5063 * Likewise for fallthru in, we check if ip is the start of a protected block and start is not set
5064 * TODO convert these checks to be done using flags and not this loop
5066 for (i = 0; i < ctx.header->num_clauses && ctx.valid; ++i) {
5067 MonoExceptionClause *clause = ctx.header->clauses + i;
5069 if ((clause->try_offset + clause->try_len == ip_offset) && start == 0) {
5070 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallthru off try block at 0x%04x", ip_offset));
5074 if ((clause->handler_offset + clause->handler_len == ip_offset) && start == 0) {
5075 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER)
5076 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("fallout of handler block at 0x%04x", ip_offset));
5078 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallout of handler block at 0x%04x", ip_offset));
5082 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER && clause->handler_offset == ip_offset && start == 0) {
5083 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("fallout of filter block at 0x%04x", ip_offset));
5087 if (clause->handler_offset == ip_offset && start == 0) {
5088 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallthru handler block at 0x%04x", ip_offset));
5092 if (clause->try_offset == ip_offset && ctx.eval.size > 0 && start == 0) {
5093 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Try to enter try block with a non-empty stack at 0x%04x", ip_offset));
5098 /*This must be done after fallthru detection otherwise it won't happen.*/
5100 /*FIXME remove this once we move all bad branch checking code to use BB only*/
5101 ctx.code [ip_offset].flags |= IL_CODE_FLAG_SEEN;
5110 VERIFIER_DEBUG ( printf ("extra merge needed! 0x%04x \n", ctx.target); );
5111 merge_stacks (&ctx, &ctx.eval, &ctx.code [ctx.target], FALSE, TRUE);
5114 merge_stacks (&ctx, &ctx.eval, &ctx.code[ip_offset], start, FALSE);
5117 /*TODO we can fast detect a forward branch or exception block targeting code after prefix, we should fail fast*/
5118 #ifdef MONO_VERIFIER_DEBUG
5121 discode = mono_disasm_code_one (NULL, method, ip, NULL);
5122 discode [strlen (discode) - 1] = 0; /* no \n */
5123 g_print ("[%d] %-29s (%d)\n", ip_offset, discode, ctx.eval.size);
5126 dump_stack_state (&ctx.code [ip_offset]);
5127 dump_stack_state (&ctx.eval);
5140 push_arg (&ctx, *ip - CEE_LDARG_0, FALSE);
5146 code_bounds_check (2);
5147 push_arg (&ctx, ip [1], *ip == CEE_LDARGA_S);
5151 case CEE_ADD_OVF_UN:
5152 do_binop (&ctx, *ip, add_ovf_un_table);
5156 case CEE_SUB_OVF_UN:
5157 do_binop (&ctx, *ip, sub_ovf_un_table);
5164 case CEE_MUL_OVF_UN:
5165 do_binop (&ctx, *ip, bin_ovf_table);
5170 do_binop (&ctx, *ip, add_table);
5175 do_binop (&ctx, *ip, sub_table);
5182 do_binop (&ctx, *ip, bin_op_table);
5191 do_binop (&ctx, *ip, int_bin_op_table);
5198 do_binop (&ctx, *ip, shift_op_table);
5203 if (!check_underflow (&ctx, 1))
5205 stack_pop_safe (&ctx);
5219 /*TODO support definite assignment verification? */
5220 push_local (&ctx, *ip - CEE_LDLOC_0, FALSE);
5228 store_local (&ctx, *ip - CEE_STLOC_0);
5233 code_bounds_check (2);
5234 store_local (&ctx, ip [1]);
5239 code_bounds_check (2);
5240 store_arg (&ctx, ip [1]);
5254 if (check_overflow (&ctx))
5255 stack_push_val (&ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
5260 code_bounds_check (2);
5261 if (check_overflow (&ctx))
5262 stack_push_val (&ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
5267 code_bounds_check (5);
5268 if (check_overflow (&ctx))
5269 stack_push_val (&ctx,TYPE_I4, &mono_defaults.int32_class->byval_arg);
5274 code_bounds_check (9);
5275 if (check_overflow (&ctx))
5276 stack_push_val (&ctx,TYPE_I8, &mono_defaults.int64_class->byval_arg);
5281 code_bounds_check (5);
5282 if (check_overflow (&ctx))
5283 stack_push_val (&ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
5288 code_bounds_check (9);
5289 if (check_overflow (&ctx))
5290 stack_push_val (&ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
5295 if (check_overflow (&ctx))
5296 stack_push_val (&ctx, TYPE_COMPLEX | NULL_LITERAL_MASK, &mono_defaults.object_class->byval_arg);
5302 code_bounds_check (2);
5303 do_branch_op (&ctx, (signed char)ip [1] + 2, cmp_br_eq_op);
5316 code_bounds_check (2);
5317 do_branch_op (&ctx, (signed char)ip [1] + 2, cmp_br_op);
5324 code_bounds_check (5);
5325 do_branch_op (&ctx, (gint32)read32 (ip + 1) + 5, cmp_br_eq_op);
5338 code_bounds_check (5);
5339 do_branch_op (&ctx, (gint32)read32 (ip + 1) + 5, cmp_br_op);
5346 code_bounds_check (2);
5347 push_local (&ctx, ip[1], *ip == CEE_LDLOCA_S);
5352 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5358 if (!check_underflow (&ctx, 1))
5360 if (!check_overflow (&ctx))
5362 top = stack_push (&ctx);
5363 copy_stack_value (top, stack_peek (&ctx, 1));
5369 code_bounds_check (5);
5371 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Eval stack must be empty in jmp at 0x%04x", ip_offset));
5372 /* token = read32 (ip + 1); */
5373 if (in_any_block (ctx.header, ip_offset))
5374 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("jmp cannot escape exception blocks at 0x%04x", ip_offset));
5376 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Intruction jmp is not verifiable at 0x%04x", ctx.ip_offset));
5378 * FIXME: check signature, retval, arguments etc.
5384 code_bounds_check (5);
5385 do_invoke_method (&ctx, read32 (ip + 1), *ip == CEE_CALLVIRT);
5390 code_bounds_check (5);
5391 /* token = read32 (ip + 1); */
5393 * FIXME: check signature, retval, arguments etc.
5394 * FIXME: check requirements for tail call
5396 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Intruction calli is not verifiable at 0x%04x", ctx.ip_offset));
5400 code_bounds_check (2);
5401 do_static_branch (&ctx, (signed char)ip [1] + 2);
5409 code_bounds_check (2);
5410 do_boolean_branch_op (&ctx, (signed char)ip [1] + 2);
5416 code_bounds_check (5);
5417 do_static_branch (&ctx, (gint32)read32 (ip + 1) + 5);
5425 code_bounds_check (5);
5426 do_boolean_branch_op (&ctx, (gint32)read32 (ip + 1) + 5);
5433 code_bounds_check (5);
5434 entries = read32 (ip + 1);
5436 if (entries > 0xFFFFFFFFU / sizeof (guint32))
5437 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Too many switch entries %x at 0x%04x", entries, ctx.ip_offset));
5440 code_bounds_check (sizeof (guint32) * entries);
5442 do_switch (&ctx, entries, ip);
5443 ip += sizeof (guint32) * entries;
5457 do_load_indirect (&ctx, *ip);
5469 do_store_indirect (&ctx, *ip);
5475 do_unary_math_op (&ctx, *ip);
5485 do_conversion (&ctx, TYPE_I4);
5491 do_conversion (&ctx, TYPE_I8);
5498 do_conversion (&ctx, TYPE_R8);
5504 do_conversion (&ctx, TYPE_NATIVE_INT);
5509 code_bounds_check (5);
5510 do_cpobj (&ctx, read32 (ip + 1));
5515 code_bounds_check (5);
5516 do_ldobj_value (&ctx, read32 (ip + 1));
5521 code_bounds_check (5);
5522 do_ldstr (&ctx, read32 (ip + 1));
5527 code_bounds_check (5);
5528 do_newobj (&ctx, read32 (ip + 1));
5534 code_bounds_check (5);
5535 do_cast (&ctx, read32 (ip + 1), *ip == CEE_CASTCLASS ? "castclass" : "isinst");
5541 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5546 code_bounds_check (5);
5547 do_unbox_value (&ctx, read32 (ip + 1));
5559 code_bounds_check (5);
5560 do_push_field (&ctx, read32 (ip + 1), *ip == CEE_LDFLDA);
5566 code_bounds_check (5);
5567 do_push_static_field (&ctx, read32 (ip + 1), *ip == CEE_LDSFLDA);
5572 code_bounds_check (5);
5573 do_store_field (&ctx, read32 (ip + 1));
5578 code_bounds_check (5);
5579 do_store_static_field (&ctx, read32 (ip + 1));
5584 code_bounds_check (5);
5585 do_stobj (&ctx, read32 (ip + 1));
5589 case CEE_CONV_OVF_I1_UN:
5590 case CEE_CONV_OVF_I2_UN:
5591 case CEE_CONV_OVF_I4_UN:
5592 case CEE_CONV_OVF_U1_UN:
5593 case CEE_CONV_OVF_U2_UN:
5594 case CEE_CONV_OVF_U4_UN:
5595 do_conversion (&ctx, TYPE_I4);
5599 case CEE_CONV_OVF_I8_UN:
5600 case CEE_CONV_OVF_U8_UN:
5601 do_conversion (&ctx, TYPE_I8);
5605 case CEE_CONV_OVF_I_UN:
5606 case CEE_CONV_OVF_U_UN:
5607 do_conversion (&ctx, TYPE_NATIVE_INT);
5612 code_bounds_check (5);
5613 do_box_value (&ctx, read32 (ip + 1));
5618 code_bounds_check (5);
5619 do_newarr (&ctx, read32 (ip + 1));
5629 code_bounds_check (5);
5630 do_ldelema (&ctx, read32 (ip + 1));
5644 case CEE_LDELEM_REF:
5645 do_ldelem (&ctx, *ip, 0);
5656 case CEE_STELEM_REF:
5657 do_stelem (&ctx, *ip, 0);
5662 code_bounds_check (5);
5663 do_ldelem (&ctx, *ip, read32 (ip + 1));
5668 code_bounds_check (5);
5669 do_stelem (&ctx, *ip, read32 (ip + 1));
5674 code_bounds_check (5);
5675 do_unbox_any (&ctx, read32 (ip + 1));
5679 case CEE_CONV_OVF_I1:
5680 case CEE_CONV_OVF_U1:
5681 case CEE_CONV_OVF_I2:
5682 case CEE_CONV_OVF_U2:
5683 case CEE_CONV_OVF_I4:
5684 case CEE_CONV_OVF_U4:
5685 do_conversion (&ctx, TYPE_I4);
5689 case CEE_CONV_OVF_I8:
5690 case CEE_CONV_OVF_U8:
5691 do_conversion (&ctx, TYPE_I8);
5695 case CEE_CONV_OVF_I:
5696 case CEE_CONV_OVF_U:
5697 do_conversion (&ctx, TYPE_NATIVE_INT);
5702 code_bounds_check (5);
5703 do_refanyval (&ctx, read32 (ip + 1));
5713 code_bounds_check (5);
5714 do_mkrefany (&ctx, read32 (ip + 1));
5719 code_bounds_check (5);
5720 do_load_token (&ctx, read32 (ip + 1));
5724 case CEE_ENDFINALLY:
5725 if (!is_correct_endfinally (ctx.header, ip_offset))
5726 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("endfinally must be used inside a finally/fault handler at 0x%04x", ctx.ip_offset));
5733 code_bounds_check (5);
5734 do_leave (&ctx, read32 (ip + 1) + 5);
5741 code_bounds_check (2);
5742 do_leave (&ctx, (signed char)ip [1] + 2);
5749 code_bounds_check (2);
5753 code_bounds_check (3);
5754 store_local (&ctx, read16 (ip + 1));
5759 do_cmp_op (&ctx, cmp_br_eq_op, *ip);
5767 do_cmp_op (&ctx, cmp_br_op, *ip);
5772 code_bounds_check (3);
5773 store_arg (&ctx, read16 (ip + 1) );
5779 if (!check_overflow (&ctx))
5781 if (ctx.signature->call_convention != MONO_CALL_VARARG)
5782 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Cannot use arglist on method without VARGARG calling convention at 0x%04x", ctx.ip_offset));
5783 set_stack_value (&ctx, stack_push (&ctx), &mono_defaults.argumenthandle_class->byval_arg, FALSE);
5788 code_bounds_check (5);
5789 do_load_function_ptr (&ctx, read32 (ip + 1), FALSE);
5794 code_bounds_check (5);
5795 do_load_function_ptr (&ctx, read32 (ip + 1), TRUE);
5801 code_bounds_check (3);
5802 push_arg (&ctx, read16 (ip + 1), *ip == CEE_LDARGA);
5808 code_bounds_check (3);
5809 push_local (&ctx, read16 (ip + 1), *ip == CEE_LDLOCA);
5822 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5826 do_endfilter (&ctx);
5830 case CEE_UNALIGNED_:
5831 code_bounds_check (2);
5832 prefix |= PREFIX_UNALIGNED;
5836 prefix |= PREFIX_VOLATILE;
5840 prefix |= PREFIX_TAIL;
5842 if (ip < end && (*ip != CEE_CALL && *ip != CEE_CALLI && *ip != CEE_CALLVIRT))
5843 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("tail prefix must be used only with call opcodes at 0x%04x", ip_offset));
5847 code_bounds_check (5);
5848 do_initobj (&ctx, read32 (ip + 1));
5852 case CEE_CONSTRAINED_:
5853 code_bounds_check (5);
5854 ctx.constrained_type = get_boxable_mono_type (&ctx, read32 (ip + 1), "constrained.");
5855 prefix |= PREFIX_CONSTRAINED;
5860 prefix |= PREFIX_READONLY;
5865 CLEAR_PREFIX (&ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
5866 if (!check_underflow (&ctx, 3))
5868 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Instruction cpblk is not verifiable at 0x%04x", ctx.ip_offset));
5873 CLEAR_PREFIX (&ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
5874 if (!check_underflow (&ctx, 3))
5876 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Instruction initblk is not verifiable at 0x%04x", ctx.ip_offset));
5884 if (!is_correct_rethrow (ctx.header, ip_offset))
5885 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("rethrow must be used inside a catch handler at 0x%04x", ctx.ip_offset));
5892 code_bounds_check (5);
5893 do_sizeof (&ctx, read32 (ip + 1));
5897 case CEE_REFANYTYPE:
5898 do_refanytype (&ctx);
5903 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction FE %x at 0x%04x", *ip, ctx.ip_offset));
5909 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction %x at 0x%04x", *ip, ctx.ip_offset));
5913 /*TODO we can fast detect a forward branch or exception block targeting code after prefix, we should fail fast*/
5915 if (!ctx.prefix_set) //first prefix
5916 ctx.code [ctx.ip_offset].flags |= IL_CODE_FLAG_SEEN;
5917 ctx.prefix_set |= prefix;
5918 ctx.has_flags = TRUE;
5922 ctx.code [ctx.ip_offset].flags |= IL_CODE_FLAG_SEEN;
5924 if (ctx.prefix_set & PREFIX_CONSTRAINED)
5925 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after constrained prefix at 0x%04x", ctx.ip_offset));
5926 if (ctx.prefix_set & PREFIX_READONLY)
5927 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after readonly prefix at 0x%04x", ctx.ip_offset));
5928 if (ctx.prefix_set & PREFIX_VOLATILE)
5929 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after volatile prefix at 0x%04x", ctx.ip_offset));
5930 if (ctx.prefix_set & PREFIX_UNALIGNED)
5931 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after unaligned prefix at 0x%04x", ctx.ip_offset));
5932 ctx.prefix_set = prefix = 0;
5933 ctx.has_flags = FALSE;
5937 * if ip != end we overflowed: mark as error.
5939 if ((ip != end || !start) && ctx.verifiable && !ctx.list) {
5940 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Run ahead of method code at 0x%04x", ip_offset));
5943 /*We should guard against the last decoded opcode, otherwise we might add errors that doesn't make sense.*/
5944 for (i = 0; i < ctx.code_size && i < ip_offset; ++i) {
5945 if (ctx.code [i].flags & IL_CODE_FLAG_WAS_TARGET) {
5946 if (!(ctx.code [i].flags & IL_CODE_FLAG_SEEN))
5947 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or exception block target middle of intruction at 0x%04x", i));
5949 if (ctx.code [i].flags & IL_CODE_DELEGATE_SEQUENCE)
5950 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Branch to delegate code sequence at 0x%04x", i));
5952 if ((ctx.code [i].flags & IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL) && ctx.has_this_store)
5953 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Invalid ldftn with virtual function in method with stdarg 0 at 0x%04x", i));
5955 if ((ctx.code [i].flags & IL_CODE_CALL_NONFINAL_VIRTUAL) && ctx.has_this_store)
5956 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));
5959 if (mono_method_is_constructor (ctx.method) && !ctx.super_ctor_called && !ctx.method->klass->valuetype && ctx.method->klass != mono_defaults.object_class) {
5960 char *method_name = mono_method_full_name (ctx.method, TRUE);
5961 char *type = mono_type_get_full_name (ctx.method->klass);
5962 if (ctx.method->klass->parent && mono_class_has_failure (ctx.method->klass->parent))
5963 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));
5965 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Constructor %s for type %s not calling base type ctor.", method_name, type));
5966 g_free (method_name);
5972 for (i = 0; i < ctx.header->code_size; ++i) {
5973 if (ctx.code [i].stack)
5974 g_free (ctx.code [i].stack);
5978 for (tmp = ctx.funptrs; tmp; tmp = tmp->next)
5980 g_slist_free (ctx.funptrs);
5982 for (tmp = ctx.exception_types; tmp; tmp = tmp->next)
5983 mono_metadata_free_type ((MonoType *)tmp->data);
5984 g_slist_free (ctx.exception_types);
5986 for (i = 0; i < ctx.num_locals; ++i) {
5988 mono_metadata_free_type (ctx.locals [i]);
5990 for (i = 0; i < ctx.max_args; ++i) {
5992 mono_metadata_free_type (ctx.params [i]);
5996 g_free (ctx.eval.stack);
5999 g_free (ctx.locals);
6000 g_free (ctx.params);
6001 mono_basic_block_free (original_bb);
6002 mono_metadata_free_mh (ctx.header);
6004 finish_collect_stats ();
6009 mono_verify_corlib ()
6011 /* This is a public API function so cannot be removed */
6016 * mono_verifier_is_enabled_for_method:
6017 * @method: the method to probe
6019 * Returns TRUE if @method needs to be verified.
6023 mono_verifier_is_enabled_for_method (MonoMethod *method)
6025 return mono_verifier_is_enabled_for_class (method->klass) && (method->wrapper_type == MONO_WRAPPER_NONE || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD);
6029 * mono_verifier_is_enabled_for_class:
6030 * @klass: The `MonoClass` to probe
6032 * Returns TRUE if @klass need to be verified.
6036 mono_verifier_is_enabled_for_class (MonoClass *klass)
6038 return verify_all || (verifier_mode > MONO_VERIFIER_MODE_OFF && !(klass->image->assembly && klass->image->assembly->in_gac) && klass->image != mono_defaults.corlib);
6042 mono_verifier_is_enabled_for_image (MonoImage *image)
6044 return verify_all || verifier_mode > MONO_VERIFIER_MODE_OFF;
6048 * Dynamic methods are not considered full trust since if the user is trusted and need to
6049 * generate unsafe code, make the method skip verification - this is a known good way to do it.
6052 mono_verifier_is_method_full_trust (MonoMethod *method)
6054 return mono_verifier_is_class_full_trust (method->klass) && !method_is_dynamic (method);
6058 * Returns if @klass is under full trust or not.
6060 * TODO This code doesn't take CAS into account.
6062 * Under verify_all all user code must be verifiable if no security option was set
6066 mono_verifier_is_class_full_trust (MonoClass *klass)
6068 /* under CoreCLR code is trusted if it is part of the "platform" otherwise all code inside the GAC is trusted */
6069 gboolean trusted_location = !mono_security_core_clr_enabled () ?
6070 (klass->image->assembly && klass->image->assembly->in_gac) : mono_security_core_clr_is_platform_image (klass->image);
6072 if (verify_all && verifier_mode == MONO_VERIFIER_MODE_OFF)
6073 return trusted_location || klass->image == mono_defaults.corlib;
6074 return verifier_mode < MONO_VERIFIER_MODE_VERIFIABLE || trusted_location || klass->image == mono_defaults.corlib;
6078 mono_method_verify_with_current_settings (MonoMethod *method, gboolean skip_visibility, gboolean is_fulltrust)
6080 return mono_method_verify (method,
6081 (verifier_mode != MONO_VERIFIER_MODE_STRICT ? MONO_VERIFY_NON_STRICT: 0)
6082 | (!is_fulltrust && !mono_verifier_is_method_full_trust (method) ? MONO_VERIFY_FAIL_FAST : 0)
6083 | (skip_visibility ? MONO_VERIFY_SKIP_VISIBILITY : 0));
6087 get_field_end (MonoClassField *field)
6090 int size = mono_type_size (field->type, &align);
6092 size = 4; /*FIXME Is this a safe bet?*/
6093 return size + field->offset;
6097 verify_class_for_overlapping_reference_fields (MonoClass *klass)
6100 gpointer iter = NULL;
6101 MonoClassField *field;
6102 gboolean is_fulltrust = mono_verifier_is_class_full_trust (klass);
6103 /*We can't skip types with !has_references since this is calculated after we have run.*/
6104 if (!((klass->flags & TYPE_ATTRIBUTE_LAYOUT_MASK) == TYPE_ATTRIBUTE_EXPLICIT_LAYOUT))
6108 /*We must check for stuff overlapping reference fields.
6109 The outer loop uses mono_class_get_fields to ensure that MonoClass:fields get inited.
6111 while ((field = mono_class_get_fields (klass, &iter))) {
6112 int fieldEnd = get_field_end (field);
6113 gboolean is_valuetype = !MONO_TYPE_IS_REFERENCE (field->type);
6116 if (mono_field_is_deleted (field) || (field->type->attrs & FIELD_ATTRIBUTE_STATIC))
6119 for (j = i; j < klass->field.count; ++j) {
6120 MonoClassField *other = &klass->fields [j];
6121 int otherEnd = get_field_end (other);
6122 if (mono_field_is_deleted (other) || (is_valuetype && !MONO_TYPE_IS_REFERENCE (other->type)) || (other->type->attrs & FIELD_ATTRIBUTE_STATIC))
6125 if (!is_valuetype && MONO_TYPE_IS_REFERENCE (other->type) && field->offset == other->offset && is_fulltrust)
6128 if ((otherEnd > field->offset && otherEnd <= fieldEnd) || (other->offset >= field->offset && other->offset < fieldEnd))
6136 field_hash (gconstpointer key)
6138 const MonoClassField *field = (const MonoClassField *)key;
6139 return g_str_hash (field->name) ^ mono_metadata_type_hash (field->type); /**/
6143 field_equals (gconstpointer _a, gconstpointer _b)
6145 const MonoClassField *a = (const MonoClassField *)_a;
6146 const MonoClassField *b = (const MonoClassField *)_b;
6147 return !strcmp (a->name, b->name) && mono_metadata_type_equal (a->type, b->type);
6152 verify_class_fields (MonoClass *klass)
6154 gpointer iter = NULL;
6155 MonoClassField *field;
6156 MonoGenericContext *context = mono_class_get_context (klass);
6157 GHashTable *unique_fields = g_hash_table_new_full (&field_hash, &field_equals, NULL, NULL);
6158 if (klass->generic_container)
6159 context = &klass->generic_container->context;
6161 while ((field = mono_class_get_fields (klass, &iter)) != NULL) {
6162 if (!mono_type_is_valid_type_in_context (field->type, context)) {
6163 g_hash_table_destroy (unique_fields);
6166 if (g_hash_table_lookup (unique_fields, field)) {
6167 g_hash_table_destroy (unique_fields);
6170 g_hash_table_insert (unique_fields, field, field);
6172 g_hash_table_destroy (unique_fields);
6177 verify_interfaces (MonoClass *klass)
6180 for (i = 0; i < klass->interface_count; ++i) {
6181 MonoClass *iface = klass->interfaces [i];
6182 if (!(iface->flags & TYPE_ATTRIBUTE_INTERFACE))
6189 verify_valuetype_layout_with_target (MonoClass *klass, MonoClass *target_class)
6192 gpointer iter = NULL;
6193 MonoClassField *field;
6194 MonoClass *field_class;
6196 if (!klass->valuetype)
6199 type = klass->byval_arg.type;
6200 /*primitive type fields are not properly decoded*/
6201 if ((type >= MONO_TYPE_BOOLEAN && type <= MONO_TYPE_R8) || (type >= MONO_TYPE_I && type <= MONO_TYPE_U))
6204 while ((field = mono_class_get_fields (klass, &iter)) != NULL) {
6208 if (field->type->attrs & (FIELD_ATTRIBUTE_STATIC | FIELD_ATTRIBUTE_HAS_FIELD_RVA))
6211 field_class = mono_class_get_generic_type_definition (mono_class_from_mono_type (field->type));
6213 if (field_class == target_class || klass == field_class || !verify_valuetype_layout_with_target (field_class, target_class))
6221 verify_valuetype_layout (MonoClass *klass)
6224 res = verify_valuetype_layout_with_target (klass, klass);
6229 recursive_mark_constraint_args (MonoBitSet *used_args, MonoGenericContainer *gc, MonoType *type)
6232 MonoClass **constraints;
6233 MonoGenericParamInfo *param_info;
6235 g_assert (mono_type_is_generic_argument (type));
6237 idx = mono_type_get_generic_param_num (type);
6238 if (mono_bitset_test_fast (used_args, idx))
6241 mono_bitset_set_fast (used_args, idx);
6242 param_info = mono_generic_container_get_param_info (gc, idx);
6244 if (!param_info->constraints)
6247 for (constraints = param_info->constraints; *constraints; ++constraints) {
6248 MonoClass *ctr = *constraints;
6249 MonoType *constraint_type = &ctr->byval_arg;
6251 if (mono_type_is_generic_argument (constraint_type) && !recursive_mark_constraint_args (used_args, gc, constraint_type))
6258 verify_generic_parameters (MonoClass *klass)
6261 MonoGenericContainer *gc = klass->generic_container;
6262 MonoBitSet *used_args = mono_bitset_new (gc->type_argc, 0);
6264 for (i = 0; i < gc->type_argc; ++i) {
6265 MonoGenericParamInfo *param_info = mono_generic_container_get_param_info (gc, i);
6266 MonoClass **constraints;
6268 if (!param_info->constraints)
6271 mono_bitset_clear_all (used_args);
6272 mono_bitset_set_fast (used_args, i);
6274 for (constraints = param_info->constraints; *constraints; ++constraints) {
6275 MonoClass *ctr = *constraints;
6276 MonoType *constraint_type = &ctr->byval_arg;
6278 if (!mono_class_can_access_class (klass, ctr))
6281 if (!mono_type_is_valid_type_in_context (constraint_type, &gc->context))
6284 if (mono_type_is_generic_argument (constraint_type) && !recursive_mark_constraint_args (used_args, gc, constraint_type))
6286 if (ctr->generic_class && !mono_class_is_valid_generic_instantiation (NULL, ctr))
6290 mono_bitset_free (used_args);
6294 mono_bitset_free (used_args);
6299 * Check if the class is verifiable.
6301 * Right now there are no conditions that make a class a valid but not verifiable. Both overlapping reference
6302 * field and invalid generic instantiation are fatal errors.
6304 * This method must be safe to be called from mono_class_init and all code must be carefull about that.
6308 mono_verifier_verify_class (MonoClass *klass)
6310 /*Neither <Module>, object or ifaces have parent.*/
6311 if (!klass->parent &&
6312 klass != mono_defaults.object_class &&
6313 !MONO_CLASS_IS_INTERFACE (klass) &&
6314 (!image_is_dynamic (klass->image) && klass->type_token != 0x2000001)) /*<Module> is the first type in the assembly*/
6316 if (klass->parent) {
6317 if (MONO_CLASS_IS_INTERFACE (klass->parent))
6319 if (!klass->generic_class && klass->parent->generic_container)
6321 if (klass->parent->generic_class && !klass->generic_class) {
6322 MonoGenericContext *context = mono_class_get_context (klass);
6323 if (klass->generic_container)
6324 context = &klass->generic_container->context;
6325 if (!mono_type_is_valid_type_in_context (&klass->parent->byval_arg, context))
6329 if (klass->generic_container && (klass->flags & TYPE_ATTRIBUTE_LAYOUT_MASK) == TYPE_ATTRIBUTE_EXPLICIT_LAYOUT)
6331 if (klass->generic_container && !verify_generic_parameters (klass))
6333 if (!verify_class_for_overlapping_reference_fields (klass))
6335 if (klass->generic_class && !mono_class_is_valid_generic_instantiation (NULL, klass))
6337 if (klass->generic_class == NULL && !verify_class_fields (klass))
6339 if (klass->valuetype && !verify_valuetype_layout (klass))
6341 if (!verify_interfaces (klass))
6347 mono_verifier_class_is_valid_generic_instantiation (MonoClass *klass)
6349 return mono_class_is_valid_generic_instantiation (NULL, klass);
6353 mono_verifier_is_method_valid_generic_instantiation (MonoMethod *method)
6355 if (!method->is_inflated)
6357 return mono_method_is_valid_generic_instantiation (NULL, method);
6363 mono_verifier_verify_class (MonoClass *klass)
6365 /* The verifier was disabled at compile time */
6370 mono_method_verify_with_current_settings (MonoMethod *method, gboolean skip_visibility, gboolean is_fulltrust)
6372 /* The verifier was disabled at compile time */
6377 mono_verifier_is_class_full_trust (MonoClass *klass)
6379 /* The verifier was disabled at compile time */
6384 mono_verifier_is_method_full_trust (MonoMethod *method)
6386 /* The verifier was disabled at compile time */
6391 mono_verifier_is_enabled_for_image (MonoImage *image)
6393 /* The verifier was disabled at compile time */
6398 mono_verifier_is_enabled_for_class (MonoClass *klass)
6400 /* The verifier was disabled at compile time */
6405 mono_verifier_is_enabled_for_method (MonoMethod *method)
6407 /* The verifier was disabled at compile time */
6412 mono_method_verify (MonoMethod *method, int level)
6414 /* The verifier was disabled at compile time */
6419 mono_free_verify_list (GSList *list)
6421 /* The verifier was disabled at compile time */
6422 /* will always be null if verifier is disabled */
6426 mono_verifier_class_is_valid_generic_instantiation (MonoClass *klass)
6432 mono_verifier_is_method_valid_generic_instantiation (MonoMethod *method)