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)
12 #include <mono/metadata/object-internals.h>
13 #include <mono/metadata/verify.h>
14 #include <mono/metadata/verify-internals.h>
15 #include <mono/metadata/opcodes.h>
16 #include <mono/metadata/tabledefs.h>
17 #include <mono/metadata/reflection.h>
18 #include <mono/metadata/debug-helpers.h>
19 #include <mono/metadata/mono-endian.h>
20 #include <mono/metadata/metadata.h>
21 #include <mono/metadata/metadata-internals.h>
22 #include <mono/metadata/class-internals.h>
23 #include <mono/metadata/security-manager.h>
24 #include <mono/metadata/security-core-clr.h>
25 #include <mono/metadata/tokentype.h>
26 #include <mono/metadata/mono-basic-block.h>
32 static MiniVerifierMode verifier_mode = MONO_VERIFIER_MODE_OFF;
33 static gboolean verify_all = FALSE;
36 * Set the desired level of checks for the verfier.
40 mono_verifier_set_mode (MiniVerifierMode mode)
46 mono_verifier_enable_verify_all ()
51 #ifndef DISABLE_VERIFIER
53 * Pull the list of opcodes
55 #define OPDEF(a,b,c,d,e,f,g,h,i,j) \
59 #include "mono/cil/opcode.def"
64 #ifdef MONO_VERIFIER_DEBUG
65 #define VERIFIER_DEBUG(code) do { code } while (0)
67 #define VERIFIER_DEBUG(code)
70 //////////////////////////////////////////////////////////////////
71 #define IS_STRICT_MODE(ctx) (((ctx)->level & MONO_VERIFY_NON_STRICT) == 0)
72 #define IS_FAIL_FAST_MODE(ctx) (((ctx)->level & MONO_VERIFY_FAIL_FAST) == MONO_VERIFY_FAIL_FAST)
73 #define IS_SKIP_VISIBILITY(ctx) (((ctx)->level & MONO_VERIFY_SKIP_VISIBILITY) == MONO_VERIFY_SKIP_VISIBILITY)
74 #define IS_REPORT_ALL_ERRORS(ctx) (((ctx)->level & MONO_VERIFY_REPORT_ALL_ERRORS) == MONO_VERIFY_REPORT_ALL_ERRORS)
75 #define CLEAR_PREFIX(ctx, prefix) do { (ctx)->prefix_set &= ~(prefix); } while (0)
76 #define ADD_VERIFY_INFO(__ctx, __msg, __status, __exception) \
78 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
79 vinfo->info.status = __status; \
80 vinfo->info.message = ( __msg ); \
81 vinfo->exception_type = (__exception); \
82 (__ctx)->list = g_slist_prepend ((__ctx)->list, vinfo); \
85 //TODO support MONO_VERIFY_REPORT_ALL_ERRORS
86 #define ADD_VERIFY_ERROR(__ctx, __msg) \
88 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_ERROR, MONO_EXCEPTION_INVALID_PROGRAM); \
92 #define CODE_NOT_VERIFIABLE(__ctx, __msg) \
94 if ((__ctx)->verifiable || IS_REPORT_ALL_ERRORS (__ctx)) { \
95 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_NOT_VERIFIABLE, MONO_EXCEPTION_UNVERIFIABLE_IL); \
96 (__ctx)->verifiable = 0; \
97 if (IS_FAIL_FAST_MODE (__ctx)) \
102 #define ADD_VERIFY_ERROR2(__ctx, __msg, __exception) \
104 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_ERROR, __exception); \
105 (__ctx)->valid = 0; \
108 #define CODE_NOT_VERIFIABLE2(__ctx, __msg, __exception) \
110 if ((__ctx)->verifiable || IS_REPORT_ALL_ERRORS (__ctx)) { \
111 ADD_VERIFY_INFO(__ctx, __msg, MONO_VERIFY_NOT_VERIFIABLE, __exception); \
112 (__ctx)->verifiable = 0; \
113 if (IS_FAIL_FAST_MODE (__ctx)) \
114 (__ctx)->valid = 0; \
118 #define CHECK_ADD4_OVERFLOW_UN(a, b) ((guint32)(0xFFFFFFFFU) - (guint32)(b) < (guint32)(a))
119 #define CHECK_ADD8_OVERFLOW_UN(a, b) ((guint64)(0xFFFFFFFFFFFFFFFFUL) - (guint64)(b) < (guint64)(a))
121 #if SIZEOF_VOID_P == 4
122 #define CHECK_ADDP_OVERFLOW_UN(a,b) CHECK_ADD4_OVERFLOW_UN(a, b)
124 #define CHECK_ADDP_OVERFLOW_UN(a,b) CHECK_ADD8_OVERFLOW_UN(a, b)
127 #define ADDP_IS_GREATER_OR_OVF(a, b, c) (((a) + (b) > (c)) || CHECK_ADDP_OVERFLOW_UN (a, b))
128 #define ADD_IS_GREATER_OR_OVF(a, b, c) (((a) + (b) > (c)) || CHECK_ADD4_OVERFLOW_UN (a, b))
130 /*Flags to be used with ILCodeDesc::flags */
132 /*Instruction has not been processed.*/
133 IL_CODE_FLAG_NOT_PROCESSED = 0,
134 /*Instruction was decoded by mono_method_verify loop.*/
135 IL_CODE_FLAG_SEEN = 1,
136 /*Instruction was target of a branch or is at a protected block boundary.*/
137 IL_CODE_FLAG_WAS_TARGET = 2,
138 /*Used by stack_init to avoid double initialize each entry.*/
139 IL_CODE_FLAG_STACK_INITED = 4,
140 /*Used by merge_stacks to decide if it should just copy the eval stack.*/
141 IL_CODE_STACK_MERGED = 8,
142 /*This instruction is part of the delegate construction sequence, it cannot be target of a branch.*/
143 IL_CODE_DELEGATE_SEQUENCE = 0x10,
144 /*This is a delegate created from a ldftn to a non final virtual method*/
145 IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL = 0x20,
146 /*This is a call to a non final virtual method*/
147 IL_CODE_CALL_NONFINAL_VIRTUAL = 0x40,
182 /*Allocated fnptr MonoType that should be freed by us.*/
184 /*Type dup'ed exception types from catch blocks.*/
185 GSList *exception_types;
190 /*TODO get rid of target here, need_merge in mono_method_verify and hoist the merging code in the branching code*/
194 MonoMethodSignature *signature;
195 MonoMethodHeader *header;
197 MonoGenericContext *generic_context;
201 /*This flag helps solving a corner case of delegate verification in that you cannot have a "starg 0"
202 *on a method that creates a delegate for a non-final virtual method using ldftn*/
203 gboolean has_this_store;
205 /*This flag is used to control if the contructor of the parent class has been called.
206 *If the this pointer is pushed on the eval stack and it's a reference type constructor and
207 * super_ctor_called is false, the uninitialized flag is set on the pushed value.
209 * Poping an uninitialized this ptr from the eval stack is an unverifiable operation unless
210 * the safe variant is used. Only a few opcodes can use it : dup, pop, ldfld, stfld and call to a constructor.
212 gboolean super_ctor_called;
216 MonoType *constrained_type;
220 merge_stacks (VerifyContext *ctx, ILCodeDesc *from, ILCodeDesc *to, gboolean start, gboolean external);
223 get_stack_type (MonoType *type);
226 mono_delegate_signature_equal (MonoMethodSignature *delegate_sig, MonoMethodSignature *method_sig, gboolean is_static_ldftn);
229 mono_class_is_valid_generic_instantiation (VerifyContext *ctx, MonoClass *klass);
232 mono_method_is_valid_generic_instantiation (VerifyContext *ctx, MonoMethod *method);
233 //////////////////////////////////////////////////////////////////
238 TYPE_INV = 0, /* leave at 0. */
243 /* Used by operator tables to resolve pointer types (managed & unmanaged) and by unmanaged pointer types*/
245 /* value types and classes */
247 /* Number of types, used to define the size of the tables*/
250 /* Used by tables to signal that a result is not verifiable*/
251 NON_VERIFIABLE_RESULT = 0x80,
253 /*Mask used to extract just the type, excluding flags */
256 /* The stack type is a managed pointer, unmask the value to res */
257 POINTER_MASK = 0x100,
259 /*Stack type with the pointer mask*/
260 RAW_TYPE_MASK = 0x10F,
262 /* Controlled Mutability Manager Pointer */
265 /* The stack type is a null literal*/
266 NULL_LITERAL_MASK = 0x400,
268 /**Used by ldarg.0 and family to let delegate verification happens.*/
269 THIS_POINTER_MASK = 0x800,
271 /**Signals that this is a boxed value type*/
274 /*This is an unitialized this ref*/
275 UNINIT_THIS_MASK = 0x2000,
278 static const char* const
279 type_names [TYPE_MAX + 1] = {
290 PREFIX_UNALIGNED = 1,
293 PREFIX_CONSTRAINED = 8,
296 //////////////////////////////////////////////////////////////////
299 /*Token validation macros and functions */
300 #define IS_MEMBER_REF(token) (mono_metadata_token_table (token) == MONO_TABLE_MEMBERREF)
301 #define IS_METHOD_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_METHOD)
302 #define IS_METHOD_SPEC(token) (mono_metadata_token_table (token) == MONO_TABLE_METHODSPEC)
303 #define IS_FIELD_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_FIELD)
305 #define IS_TYPE_REF(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPEREF)
306 #define IS_TYPE_DEF(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPEDEF)
307 #define IS_TYPE_SPEC(token) (mono_metadata_token_table (token) == MONO_TABLE_TYPESPEC)
308 #define IS_METHOD_DEF_OR_REF_OR_SPEC(token) (IS_METHOD_DEF (token) || IS_MEMBER_REF (token) || IS_METHOD_SPEC (token))
309 #define IS_TYPE_DEF_OR_REF_OR_SPEC(token) (IS_TYPE_DEF (token) || IS_TYPE_REF (token) || IS_TYPE_SPEC (token))
310 #define IS_FIELD_DEF_OR_REF(token) (IS_FIELD_DEF (token) || IS_MEMBER_REF (token))
313 * Verify if @token refers to a valid row on int's table.
316 token_bounds_check (MonoImage *image, guint32 token)
319 return mono_reflection_is_valid_dynamic_token ((MonoDynamicImage*)image, token);
320 return image->tables [mono_metadata_token_table (token)].rows >= mono_metadata_token_index (token);
324 mono_type_create_fnptr_from_mono_method (VerifyContext *ctx, MonoMethod *method)
326 MonoType *res = g_new0 (MonoType, 1);
327 //FIXME use mono_method_get_signature_full
328 res->data.method = mono_method_signature (method);
329 res->type = MONO_TYPE_FNPTR;
330 ctx->funptrs = g_slist_prepend (ctx->funptrs, res);
335 * mono_type_is_enum_type:
337 * Returns TRUE if @type is an enum type.
340 mono_type_is_enum_type (MonoType *type)
342 if (type->type == MONO_TYPE_VALUETYPE && type->data.klass->enumtype)
344 if (type->type == MONO_TYPE_GENERICINST && type->data.generic_class->container_class->enumtype)
350 * mono_type_is_value_type:
352 * Returns TRUE if @type is named after @namespace.@name.
356 mono_type_is_value_type (MonoType *type, const char *namespace, const char *name)
358 return type->type == MONO_TYPE_VALUETYPE &&
359 !strcmp (namespace, type->data.klass->name_space) &&
360 !strcmp (name, type->data.klass->name);
364 * Returns TURE if @type is VAR or MVAR
367 mono_type_is_generic_argument (MonoType *type)
369 return type->type == MONO_TYPE_VAR || type->type == MONO_TYPE_MVAR;
373 * mono_type_get_underlying_type_any:
375 * This functions is just like mono_type_get_underlying_type but it doesn't care if the type is byref.
377 * Returns the underlying type of @type regardless if it is byref or not.
380 mono_type_get_underlying_type_any (MonoType *type)
382 if (type->type == MONO_TYPE_VALUETYPE && type->data.klass->enumtype)
383 return mono_class_enum_basetype (type->data.klass);
384 if (type->type == MONO_TYPE_GENERICINST && type->data.generic_class->container_class->enumtype)
385 return mono_class_enum_basetype (type->data.generic_class->container_class);
389 static G_GNUC_UNUSED const char*
390 mono_type_get_stack_name (MonoType *type)
392 return type_names [get_stack_type (type) & TYPE_MASK];
395 #define CTOR_REQUIRED_FLAGS (METHOD_ATTRIBUTE_SPECIAL_NAME | METHOD_ATTRIBUTE_RT_SPECIAL_NAME)
396 #define CTOR_INVALID_FLAGS (METHOD_ATTRIBUTE_STATIC)
399 mono_method_is_constructor (MonoMethod *method)
401 return ((method->flags & CTOR_REQUIRED_FLAGS) == CTOR_REQUIRED_FLAGS &&
402 !(method->flags & CTOR_INVALID_FLAGS) &&
403 !strcmp (".ctor", method->name));
407 mono_class_has_default_constructor (MonoClass *klass)
412 mono_class_setup_methods (klass);
413 if (klass->exception_type)
416 for (i = 0; i < klass->method.count; ++i) {
417 method = klass->methods [i];
418 if (mono_method_is_constructor (method) &&
419 mono_method_signature (method) &&
420 mono_method_signature (method)->param_count == 0 &&
421 (method->flags & METHOD_ATTRIBUTE_MEMBER_ACCESS_MASK) == METHOD_ATTRIBUTE_PUBLIC)
428 * Verify if @type is valid for the given @ctx verification context.
429 * this function checks for VAR and MVAR types that are invalid under the current verifier,
432 mono_type_is_valid_type_in_context (MonoType *type, MonoGenericContext *context)
435 MonoGenericInst *inst;
437 switch (type->type) {
442 inst = type->type == MONO_TYPE_VAR ? context->class_inst : context->method_inst;
443 if (!inst || mono_type_get_generic_param_num (type) >= inst->type_argc)
446 case MONO_TYPE_SZARRAY:
447 return mono_type_is_valid_type_in_context (&type->data.klass->byval_arg, context);
448 case MONO_TYPE_ARRAY:
449 return mono_type_is_valid_type_in_context (&type->data.array->eklass->byval_arg, context);
451 return mono_type_is_valid_type_in_context (type->data.type, context);
452 case MONO_TYPE_GENERICINST:
453 inst = type->data.generic_class->context.class_inst;
456 for (i = 0; i < inst->type_argc; ++i)
457 if (!mono_type_is_valid_type_in_context (inst->type_argv [i], context))
464 /*This function returns NULL if the type is not instantiatable*/
466 verifier_inflate_type (VerifyContext *ctx, MonoType *type, MonoGenericContext *context)
471 result = mono_class_inflate_generic_type_checked (type, context, &error);
472 if (!mono_error_ok (&error)) {
473 mono_error_cleanup (&error);
481 is_valid_generic_instantiation (MonoGenericContainer *gc, MonoGenericContext *context, MonoGenericInst *ginst)
486 if (ginst->type_argc != gc->type_argc)
489 for (i = 0; i < gc->type_argc; ++i) {
490 MonoGenericParamInfo *param_info = mono_generic_container_get_param_info (gc, i);
491 MonoClass *paramClass;
492 MonoClass **constraints;
494 if (!param_info->constraints && !(param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK))
496 if (mono_type_is_generic_argument (ginst->type_argv [i]))
497 continue; //it's not our job to validate type variables
499 paramClass = mono_class_from_mono_type (ginst->type_argv [i]);
501 if (paramClass->exception_type != MONO_EXCEPTION_NONE)
504 /*it's not safe to call mono_class_init from here*/
505 if (paramClass->generic_class && !paramClass->inited) {
506 if (!mono_class_is_valid_generic_instantiation (NULL, paramClass))
510 if ((param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_VALUE_TYPE_CONSTRAINT) && (!paramClass->valuetype || mono_class_is_nullable (paramClass)))
513 if ((param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_REFERENCE_TYPE_CONSTRAINT) && paramClass->valuetype)
516 if ((param_info->flags & GENERIC_PARAMETER_ATTRIBUTE_CONSTRUCTOR_CONSTRAINT) && !paramClass->valuetype && !mono_class_has_default_constructor (paramClass))
519 if (!param_info->constraints)
522 for (constraints = param_info->constraints; *constraints; ++constraints) {
523 MonoClass *ctr = *constraints;
526 inflated = mono_class_inflate_generic_type_checked (&ctr->byval_arg, context, &error);
527 if (!mono_error_ok (&error)) {
528 mono_error_cleanup (&error);
531 ctr = mono_class_from_mono_type (inflated);
532 mono_metadata_free_type (inflated);
534 if (!mono_class_is_assignable_from_slow (ctr, paramClass))
542 * Return true if @candidate is constraint compatible with @target.
544 * This means that @candidate constraints are a super set of @target constaints
547 mono_generic_param_is_constraint_compatible (VerifyContext *ctx, MonoGenericParam *target, MonoGenericParam *candidate, MonoGenericContext *context)
549 MonoGenericParamInfo *tinfo = mono_generic_param_info (target);
550 MonoGenericParamInfo *cinfo = mono_generic_param_info (candidate);
552 int tmask = tinfo->flags & GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK;
553 int cmask = cinfo->flags & GENERIC_PARAMETER_ATTRIBUTE_SPECIAL_CONSTRAINTS_MASK;
554 if ((tmask & cmask) != tmask)
557 if (tinfo->constraints) {
558 MonoClass **target_class, **candidate_class;
559 if (!cinfo->constraints)
561 for (target_class = tinfo->constraints; *target_class; ++target_class) {
563 MonoType *inflated = verifier_inflate_type (ctx, &(*target_class)->byval_arg, context);
566 tc = mono_class_from_mono_type (inflated);
567 mono_metadata_free_type (inflated);
569 for (candidate_class = cinfo->constraints; *candidate_class; ++candidate_class) {
571 inflated = verifier_inflate_type (ctx, &(*candidate_class)->byval_arg, ctx->generic_context);
574 cc = mono_class_from_mono_type (inflated);
575 mono_metadata_free_type (inflated);
577 if (mono_class_is_assignable_from (tc, cc))
580 if (!*candidate_class)
587 static MonoGenericParam*
588 verifier_get_generic_param_from_type (VerifyContext *ctx, MonoType *type)
590 MonoGenericContainer *gc;
591 MonoMethod *method = ctx->method;
594 num = mono_type_get_generic_param_num (type);
596 if (type->type == MONO_TYPE_VAR) {
597 MonoClass *gtd = method->klass;
598 if (gtd->generic_class)
599 gtd = gtd->generic_class->container_class;
600 gc = gtd->generic_container;
602 MonoMethod *gmd = method;
603 if (method->is_inflated)
604 gmd = ((MonoMethodInflated*)method)->declaring;
605 gc = mono_method_get_generic_container (gmd);
609 return mono_generic_container_get_param (gc, num);
615 * Verify if @type is valid for the given @ctx verification context.
616 * this function checks for VAR and MVAR types that are invalid under the current verifier,
617 * This means that it either
620 is_valid_type_in_context (VerifyContext *ctx, MonoType *type)
622 return mono_type_is_valid_type_in_context (type, ctx->generic_context);
626 is_valid_generic_instantiation_in_context (VerifyContext *ctx, MonoGenericInst *ginst)
629 for (i = 0; i < ginst->type_argc; ++i) {
630 MonoType *type = ginst->type_argv [i];
631 if (!is_valid_type_in_context (ctx, type))
638 generic_arguments_respect_constraints (VerifyContext *ctx, MonoGenericContainer *gc, MonoGenericContext *context, MonoGenericInst *ginst)
641 for (i = 0; i < ginst->type_argc; ++i) {
642 MonoType *type = ginst->type_argv [i];
643 MonoGenericParam *target = mono_generic_container_get_param (gc, i);
644 MonoGenericParam *candidate;
646 if (!mono_type_is_generic_argument (type))
649 if (!is_valid_type_in_context (ctx, type))
652 candidate = verifier_get_generic_param_from_type (ctx, type);
654 if (!mono_generic_param_is_constraint_compatible (ctx, target, candidate, context))
661 mono_method_repect_method_constraints (VerifyContext *ctx, MonoMethod *method)
663 MonoMethodInflated *gmethod = (MonoMethodInflated *)method;
664 MonoGenericInst *ginst = gmethod->context.method_inst;
665 MonoGenericContainer *gc = mono_method_get_generic_container (gmethod->declaring);
666 return !gc || generic_arguments_respect_constraints (ctx, gc, &gmethod->context, ginst);
670 mono_class_repect_method_constraints (VerifyContext *ctx, MonoClass *klass)
672 MonoGenericClass *gklass = klass->generic_class;
673 MonoGenericInst *ginst = gklass->context.class_inst;
674 MonoGenericContainer *gc = gklass->container_class->generic_container;
675 return !gc || generic_arguments_respect_constraints (ctx, gc, &gklass->context, ginst);
679 mono_method_is_valid_generic_instantiation (VerifyContext *ctx, MonoMethod *method)
681 MonoMethodInflated *gmethod = (MonoMethodInflated *)method;
682 MonoGenericInst *ginst = gmethod->context.method_inst;
683 MonoGenericContainer *gc = mono_method_get_generic_container (gmethod->declaring);
684 if (!gc) /*non-generic inflated method - it's part of a generic type */
686 if (ctx && !is_valid_generic_instantiation_in_context (ctx, ginst))
688 return is_valid_generic_instantiation (gc, &gmethod->context, ginst);
693 mono_class_is_valid_generic_instantiation (VerifyContext *ctx, MonoClass *klass)
695 MonoGenericClass *gklass = klass->generic_class;
696 MonoGenericInst *ginst = gklass->context.class_inst;
697 MonoGenericContainer *gc = gklass->container_class->generic_container;
698 if (ctx && !is_valid_generic_instantiation_in_context (ctx, ginst))
700 return is_valid_generic_instantiation (gc, &gklass->context, ginst);
704 mono_type_is_valid_in_context (VerifyContext *ctx, MonoType *type)
709 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid null type at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
713 if (!is_valid_type_in_context (ctx, type)) {
714 char *str = mono_type_full_name (type);
715 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid generic type (%s%s) (argument out of range or %s is not generic) at 0x%04x",
716 type->type == MONO_TYPE_VAR ? "!" : "!!",
718 type->type == MONO_TYPE_VAR ? "class" : "method",
720 MONO_EXCEPTION_BAD_IMAGE);
725 klass = mono_class_from_mono_type (type);
726 mono_class_init (klass);
727 if (mono_loader_get_last_error () || klass->exception_type != MONO_EXCEPTION_NONE) {
728 if (klass->generic_class && !mono_class_is_valid_generic_instantiation (NULL, klass))
729 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);
731 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);
735 if (klass->generic_class && klass->generic_class->container_class->exception_type != MONO_EXCEPTION_NONE) {
736 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);
740 if (!klass->generic_class)
743 if (!mono_class_is_valid_generic_instantiation (ctx, klass)) {
744 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);
748 if (!mono_class_repect_method_constraints (ctx, klass)) {
749 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);
756 static verify_result_t
757 mono_method_is_valid_in_context (VerifyContext *ctx, MonoMethod *method)
759 if (!mono_type_is_valid_in_context (ctx, &method->klass->byval_arg))
760 return RESULT_INVALID;
762 if (!method->is_inflated)
765 if (!mono_method_is_valid_generic_instantiation (ctx, method)) {
766 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);
767 return RESULT_INVALID;
770 if (!mono_method_repect_method_constraints (ctx, method)) {
771 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));
772 return RESULT_UNVERIFIABLE;
778 static MonoClassField*
779 verifier_load_field (VerifyContext *ctx, int token, MonoClass **out_klass, const char *opcode) {
780 MonoClassField *field;
781 MonoClass *klass = NULL;
783 if (!IS_FIELD_DEF_OR_REF (token) || !token_bounds_check (ctx->image, token)) {
784 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);
788 field = mono_field_from_token (ctx->image, token, &klass, ctx->generic_context);
789 if (!field || !field->parent || !klass) {
790 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);
794 if (!mono_type_is_valid_in_context (ctx, &klass->byval_arg))
802 verifier_load_method (VerifyContext *ctx, int token, const char *opcode) {
805 if (!IS_METHOD_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
806 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);
810 method = mono_get_method_full (ctx->image, token, NULL, ctx->generic_context);
813 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);
817 if (mono_method_is_valid_in_context (ctx, method) == RESULT_INVALID)
824 verifier_load_type (VerifyContext *ctx, int token, const char *opcode) {
827 if (!IS_TYPE_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
828 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid type token 0x%08x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
832 type = mono_type_get_full (ctx->image, token, ctx->generic_context);
835 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);
839 if (!mono_type_is_valid_in_context (ctx, type))
846 /* stack_slot_get_type:
848 * Returns the stack type of @value. This value includes POINTER_MASK.
850 * Use this function to checks that account for a managed pointer.
853 stack_slot_get_type (ILStackDesc *value)
855 return value->stype & RAW_TYPE_MASK;
858 /* stack_slot_get_underlying_type:
860 * Returns the stack type of @value. This value does not include POINTER_MASK.
862 * Use this function is cases where the fact that the value could be a managed pointer is
863 * irrelevant. For example, field load doesn't care about this fact of type on stack.
866 stack_slot_get_underlying_type (ILStackDesc *value)
868 return value->stype & TYPE_MASK;
871 /* stack_slot_is_managed_pointer:
873 * Returns TRUE is @value is a managed pointer.
876 stack_slot_is_managed_pointer (ILStackDesc *value)
878 return (value->stype & POINTER_MASK) == POINTER_MASK;
881 /* stack_slot_is_managed_mutability_pointer:
883 * Returns TRUE is @value is a managed mutability pointer.
885 static G_GNUC_UNUSED gboolean
886 stack_slot_is_managed_mutability_pointer (ILStackDesc *value)
888 return (value->stype & CMMP_MASK) == CMMP_MASK;
891 /* stack_slot_is_null_literal:
893 * Returns TRUE is @value is the null literal.
896 stack_slot_is_null_literal (ILStackDesc *value)
898 return (value->stype & NULL_LITERAL_MASK) == NULL_LITERAL_MASK;
902 /* stack_slot_is_this_pointer:
904 * Returns TRUE is @value is the this literal
907 stack_slot_is_this_pointer (ILStackDesc *value)
909 return (value->stype & THIS_POINTER_MASK) == THIS_POINTER_MASK;
912 /* stack_slot_is_boxed_value:
914 * Returns TRUE is @value is a boxed value
917 stack_slot_is_boxed_value (ILStackDesc *value)
919 return (value->stype & BOXED_MASK) == BOXED_MASK;
923 stack_slot_get_name (ILStackDesc *value)
925 return type_names [value->stype & TYPE_MASK];
928 #define APPEND_WITH_PREDICATE(PRED,NAME) do {\
929 if (PRED (value)) { \
931 g_string_append (str, ", "); \
932 g_string_append (str, NAME); \
937 stack_slot_stack_type_full_name (ILStackDesc *value)
939 GString *str = g_string_new ("");
942 if ((value->stype & TYPE_MASK) != value->stype) {
943 gboolean first = TRUE;
944 g_string_append(str, "[");
945 APPEND_WITH_PREDICATE (stack_slot_is_this_pointer, "this");
946 APPEND_WITH_PREDICATE (stack_slot_is_boxed_value, "boxed");
947 APPEND_WITH_PREDICATE (stack_slot_is_null_literal, "null");
948 APPEND_WITH_PREDICATE (stack_slot_is_managed_mutability_pointer, "cmmp");
949 APPEND_WITH_PREDICATE (stack_slot_is_managed_pointer, "mp");
950 g_string_append(str, "] ");
953 g_string_append (str, stack_slot_get_name (value));
955 g_string_free (str, FALSE);
960 stack_slot_full_name (ILStackDesc *value)
962 char *type_name = mono_type_full_name (value->type);
963 char *stack_name = stack_slot_stack_type_full_name (value);
964 char *res = g_strdup_printf ("%s (%s)", type_name, stack_name);
970 //////////////////////////////////////////////////////////////////
972 mono_free_verify_list (GSList *list)
974 MonoVerifyInfoExtended *info;
977 for (tmp = list; tmp; tmp = tmp->next) {
979 g_free (info->info.message);
985 #define ADD_ERROR(list,msg) \
987 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
988 vinfo->info.status = MONO_VERIFY_ERROR; \
989 vinfo->info.message = (msg); \
990 (list) = g_slist_prepend ((list), vinfo); \
993 #define ADD_WARN(list,code,msg) \
995 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
996 vinfo->info.status = (code); \
997 vinfo->info.message = (msg); \
998 (list) = g_slist_prepend ((list), vinfo); \
1002 valid_cultures[][9] = {
1003 "ar-SA", "ar-IQ", "ar-EG", "ar-LY",
1004 "ar-DZ", "ar-MA", "ar-TN", "ar-OM",
1005 "ar-YE", "ar-SY", "ar-JO", "ar-LB",
1006 "ar-KW", "ar-AE", "ar-BH", "ar-QA",
1007 "bg-BG", "ca-ES", "zh-TW", "zh-CN",
1008 "zh-HK", "zh-SG", "zh-MO", "cs-CZ",
1009 "da-DK", "de-DE", "de-CH", "de-AT",
1010 "de-LU", "de-LI", "el-GR", "en-US",
1011 "en-GB", "en-AU", "en-CA", "en-NZ",
1012 "en-IE", "en-ZA", "en-JM", "en-CB",
1013 "en-BZ", "en-TT", "en-ZW", "en-PH",
1014 "es-ES-Ts", "es-MX", "es-ES-Is", "es-GT",
1015 "es-CR", "es-PA", "es-DO", "es-VE",
1016 "es-CO", "es-PE", "es-AR", "es-EC",
1017 "es-CL", "es-UY", "es-PY", "es-BO",
1018 "es-SV", "es-HN", "es-NI", "es-PR",
1019 "Fi-FI", "fr-FR", "fr-BE", "fr-CA",
1020 "Fr-CH", "fr-LU", "fr-MC", "he-IL",
1021 "hu-HU", "is-IS", "it-IT", "it-CH",
1022 "Ja-JP", "ko-KR", "nl-NL", "nl-BE",
1023 "nb-NO", "nn-NO", "pl-PL", "pt-BR",
1024 "pt-PT", "ro-RO", "ru-RU", "hr-HR",
1025 "Lt-sr-SP", "Cy-sr-SP", "sk-SK", "sq-AL",
1026 "sv-SE", "sv-FI", "th-TH", "tr-TR",
1027 "ur-PK", "id-ID", "uk-UA", "be-BY",
1028 "sl-SI", "et-EE", "lv-LV", "lt-LT",
1029 "fa-IR", "vi-VN", "hy-AM", "Lt-az-AZ",
1031 "eu-ES", "mk-MK", "af-ZA",
1032 "ka-GE", "fo-FO", "hi-IN", "ms-MY",
1033 "ms-BN", "kk-KZ", "ky-KZ", "sw-KE",
1034 "Lt-uz-UZ", "Cy-uz-UZ", "tt-TA", "pa-IN",
1035 "gu-IN", "ta-IN", "te-IN", "kn-IN",
1036 "mr-IN", "sa-IN", "mn-MN", "gl-ES",
1037 "kok-IN", "syr-SY", "div-MV"
1041 is_valid_culture (const char *cname)
1046 found = *cname == 0;
1047 for (i = 0; i < G_N_ELEMENTS (valid_cultures); ++i) {
1048 if (g_ascii_strcasecmp (valid_cultures [i], cname)) {
1057 is_valid_assembly_flags (guint32 flags) {
1058 /* Metadata: 22.1.2 */
1059 flags &= ~(0x8000 | 0x4000); /* ignore reserved bits 0x0030? */
1060 return ((flags == 1) || (flags == 0));
1064 is_valid_blob (MonoImage *image, guint32 blob_index, int notnull)
1067 const char *p, *blob_end;
1069 if (blob_index >= image->heap_blob.size)
1071 p = mono_metadata_blob_heap (image, blob_index);
1072 size = mono_metadata_decode_blob_size (p, &blob_end);
1073 if (blob_index + size + (blob_end-p) > image->heap_blob.size)
1075 if (notnull && !size)
1081 is_valid_string (MonoImage *image, guint32 str_index, int notnull)
1083 const char *p, *blob_end, *res;
1085 if (str_index >= image->heap_strings.size)
1087 res = p = mono_metadata_string_heap (image, str_index);
1088 blob_end = mono_metadata_string_heap (image, image->heap_strings.size - 1);
1092 * FIXME: should check it's a valid utf8 string, too.
1094 while (p <= blob_end) {
1099 return *p? NULL: res;
1103 is_valid_cls_ident (const char *p)
1106 * FIXME: we need the full unicode glib support for this.
1107 * Check: http://www.unicode.org/unicode/reports/tr15/Identifier.java
1108 * We do the lame thing for now.
1114 if (!isalnum (*p) && *p != '_')
1122 is_valid_filename (const char *p)
1126 return strpbrk (p, "\\//:")? 0: 1;
1130 verify_assembly_table (MonoImage *image, GSList *list, int level)
1132 MonoTableInfo *t = &image->tables [MONO_TABLE_ASSEMBLY];
1133 guint32 cols [MONO_ASSEMBLY_SIZE];
1136 if (level & MONO_VERIFY_ERROR) {
1138 ADD_ERROR (list, g_strdup ("Assembly table may only have 0 or 1 rows"));
1139 mono_metadata_decode_row (t, 0, cols, MONO_ASSEMBLY_SIZE);
1141 switch (cols [MONO_ASSEMBLY_HASH_ALG]) {
1142 case ASSEMBLY_HASH_NONE:
1143 case ASSEMBLY_HASH_MD5:
1144 case ASSEMBLY_HASH_SHA1:
1147 ADD_ERROR (list, g_strdup_printf ("Hash algorithm 0x%x unknown", cols [MONO_ASSEMBLY_HASH_ALG]));
1150 if (!is_valid_assembly_flags (cols [MONO_ASSEMBLY_FLAGS]))
1151 ADD_ERROR (list, g_strdup_printf ("Invalid flags in assembly: 0x%x", cols [MONO_ASSEMBLY_FLAGS]));
1153 if (!is_valid_blob (image, cols [MONO_ASSEMBLY_PUBLIC_KEY], FALSE))
1154 ADD_ERROR (list, g_strdup ("Assembly public key is an invalid index"));
1156 if (!(p = is_valid_string (image, cols [MONO_ASSEMBLY_NAME], TRUE))) {
1157 ADD_ERROR (list, g_strdup ("Assembly name is invalid"));
1159 if (strpbrk (p, ":\\/."))
1160 ADD_ERROR (list, g_strdup_printf ("Assembly name `%s' contains invalid chars", p));
1163 if (!(p = is_valid_string (image, cols [MONO_ASSEMBLY_CULTURE], FALSE))) {
1164 ADD_ERROR (list, g_strdup ("Assembly culture is an invalid index"));
1166 if (!is_valid_culture (p))
1167 ADD_ERROR (list, g_strdup_printf ("Assembly culture `%s' is invalid", p));
1174 verify_assemblyref_table (MonoImage *image, GSList *list, int level)
1176 MonoTableInfo *t = &image->tables [MONO_TABLE_ASSEMBLYREF];
1177 guint32 cols [MONO_ASSEMBLYREF_SIZE];
1181 if (level & MONO_VERIFY_ERROR) {
1182 for (i = 0; i < t->rows; ++i) {
1183 mono_metadata_decode_row (t, i, cols, MONO_ASSEMBLYREF_SIZE);
1184 if (!is_valid_assembly_flags (cols [MONO_ASSEMBLYREF_FLAGS]))
1185 ADD_ERROR (list, g_strdup_printf ("Invalid flags in assemblyref row %d: 0x%x", i + 1, cols [MONO_ASSEMBLY_FLAGS]));
1187 if (!is_valid_blob (image, cols [MONO_ASSEMBLYREF_PUBLIC_KEY], FALSE))
1188 ADD_ERROR (list, g_strdup_printf ("AssemblyRef public key in row %d is an invalid index", i + 1));
1190 if (!(p = is_valid_string (image, cols [MONO_ASSEMBLYREF_CULTURE], FALSE))) {
1191 ADD_ERROR (list, g_strdup_printf ("AssemblyRef culture in row %d is invalid", i + 1));
1193 if (!is_valid_culture (p))
1194 ADD_ERROR (list, g_strdup_printf ("AssemblyRef culture `%s' in row %d is invalid", p, i + 1));
1197 if (cols [MONO_ASSEMBLYREF_HASH_VALUE] && !is_valid_blob (image, cols [MONO_ASSEMBLYREF_HASH_VALUE], TRUE))
1198 ADD_ERROR (list, g_strdup_printf ("AssemblyRef hash value in row %d is invalid or not null and empty", i + 1));
1201 if (level & MONO_VERIFY_WARNING) {
1202 /* check for duplicated rows */
1203 for (i = 0; i < t->rows; ++i) {
1210 verify_class_layout_table (MonoImage *image, GSList *list, int level)
1212 MonoTableInfo *t = &image->tables [MONO_TABLE_CLASSLAYOUT];
1213 MonoTableInfo *tdef = &image->tables [MONO_TABLE_TYPEDEF];
1214 guint32 cols [MONO_CLASS_LAYOUT_SIZE];
1217 if (level & MONO_VERIFY_ERROR) {
1218 for (i = 0; i < t->rows; ++i) {
1219 mono_metadata_decode_row (t, i, cols, MONO_CLASS_LAYOUT_SIZE);
1221 if (cols [MONO_CLASS_LAYOUT_PARENT] > tdef->rows || !cols [MONO_CLASS_LAYOUT_PARENT]) {
1222 ADD_ERROR (list, g_strdup_printf ("Parent in class layout is invalid in row %d", i + 1));
1224 value = mono_metadata_decode_row_col (tdef, cols [MONO_CLASS_LAYOUT_PARENT] - 1, MONO_TYPEDEF_FLAGS);
1225 if (value & TYPE_ATTRIBUTE_INTERFACE)
1226 ADD_ERROR (list, g_strdup_printf ("Parent in class layout row %d is an interface", i + 1));
1227 if (value & TYPE_ATTRIBUTE_AUTO_LAYOUT)
1228 ADD_ERROR (list, g_strdup_printf ("Parent in class layout row %d is AutoLayout", i + 1));
1229 if (value & TYPE_ATTRIBUTE_SEQUENTIAL_LAYOUT) {
1230 switch (cols [MONO_CLASS_LAYOUT_PACKING_SIZE]) {
1231 case 0: case 1: case 2: case 4: case 8: case 16:
1232 case 32: case 64: case 128: break;
1234 ADD_ERROR (list, g_strdup_printf ("Packing size %d in class layout row %d is invalid", cols [MONO_CLASS_LAYOUT_PACKING_SIZE], i + 1));
1236 } else if (value & TYPE_ATTRIBUTE_EXPLICIT_LAYOUT) {
1238 * FIXME: LAMESPEC: it claims it must be 0 (it's 1, instead).
1239 if (cols [MONO_CLASS_LAYOUT_PACKING_SIZE])
1240 ADD_ERROR (list, g_strdup_printf ("Packing size %d in class layout row %d is invalid with explicit layout", cols [MONO_CLASS_LAYOUT_PACKING_SIZE], i + 1));
1244 * FIXME: we need to check that if class size != 0,
1245 * it needs to be greater than the class calculated size.
1246 * If parent is a valuetype it also needs to be smaller than
1247 * 1 MByte (0x100000 bytes).
1248 * To do both these checks we need to load the referenced
1249 * assemblies, though (the spec claims we didn't have to, bah).
1252 * We need to check that the parent types have the same layout
1263 verify_constant_table (MonoImage *image, GSList *list, int level)
1265 MonoTableInfo *t = &image->tables [MONO_TABLE_CONSTANT];
1266 guint32 cols [MONO_CONSTANT_SIZE];
1268 GHashTable *dups = g_hash_table_new (NULL, NULL);
1270 for (i = 0; i < t->rows; ++i) {
1271 mono_metadata_decode_row (t, i, cols, MONO_CONSTANT_SIZE);
1273 if (level & MONO_VERIFY_ERROR)
1274 if (g_hash_table_lookup (dups, GUINT_TO_POINTER (cols [MONO_CONSTANT_PARENT])))
1275 ADD_ERROR (list, g_strdup_printf ("Parent 0x%08x is duplicated in Constant row %d", cols [MONO_CONSTANT_PARENT], i + 1));
1276 g_hash_table_insert (dups, GUINT_TO_POINTER (cols [MONO_CONSTANT_PARENT]),
1277 GUINT_TO_POINTER (cols [MONO_CONSTANT_PARENT]));
1279 switch (cols [MONO_CONSTANT_TYPE]) {
1280 case MONO_TYPE_U1: /* LAMESPEC: it says I1...*/
1284 if (level & MONO_VERIFY_CLS)
1285 ADD_WARN (list, MONO_VERIFY_CLS, g_strdup_printf ("Type 0x%x not CLS compliant in Constant row %d", cols [MONO_CONSTANT_TYPE], i + 1));
1286 case MONO_TYPE_BOOLEAN:
1287 case MONO_TYPE_CHAR:
1294 case MONO_TYPE_STRING:
1295 case MONO_TYPE_CLASS:
1298 if (level & MONO_VERIFY_ERROR)
1299 ADD_ERROR (list, g_strdup_printf ("Type 0x%x is invalid in Constant row %d", cols [MONO_CONSTANT_TYPE], i + 1));
1301 if (level & MONO_VERIFY_ERROR) {
1302 value = cols [MONO_CONSTANT_PARENT] >> MONO_HASCONSTANT_BITS;
1303 switch (cols [MONO_CONSTANT_PARENT] & MONO_HASCONSTANT_MASK) {
1304 case MONO_HASCONSTANT_FIEDDEF:
1305 if (value > image->tables [MONO_TABLE_FIELD].rows)
1306 ADD_ERROR (list, g_strdup_printf ("Parent (field) is invalid in Constant row %d", i + 1));
1308 case MONO_HASCONSTANT_PARAM:
1309 if (value > image->tables [MONO_TABLE_PARAM].rows)
1310 ADD_ERROR (list, g_strdup_printf ("Parent (param) is invalid in Constant row %d", i + 1));
1312 case MONO_HASCONSTANT_PROPERTY:
1313 if (value > image->tables [MONO_TABLE_PROPERTY].rows)
1314 ADD_ERROR (list, g_strdup_printf ("Parent (property) is invalid in Constant row %d", i + 1));
1317 ADD_ERROR (list, g_strdup_printf ("Parent is invalid in Constant row %d", i + 1));
1321 if (level & MONO_VERIFY_CLS) {
1323 * FIXME: verify types is consistent with the enum type
1324 * is parent is an enum.
1328 g_hash_table_destroy (dups);
1333 verify_event_map_table (MonoImage *image, GSList *list, int level)
1335 MonoTableInfo *t = &image->tables [MONO_TABLE_EVENTMAP];
1336 guint32 cols [MONO_EVENT_MAP_SIZE];
1337 guint32 i, last_event;
1338 GHashTable *dups = g_hash_table_new (NULL, NULL);
1342 for (i = 0; i < t->rows; ++i) {
1343 mono_metadata_decode_row (t, i, cols, MONO_EVENT_MAP_SIZE);
1344 if (level & MONO_VERIFY_ERROR)
1345 if (g_hash_table_lookup (dups, GUINT_TO_POINTER (cols [MONO_EVENT_MAP_PARENT])))
1346 ADD_ERROR (list, g_strdup_printf ("Parent 0x%08x is duplicated in Event Map row %d", cols [MONO_EVENT_MAP_PARENT], i + 1));
1347 g_hash_table_insert (dups, GUINT_TO_POINTER (cols [MONO_EVENT_MAP_PARENT]),
1348 GUINT_TO_POINTER (cols [MONO_EVENT_MAP_PARENT]));
1349 if (level & MONO_VERIFY_ERROR) {
1350 if (cols [MONO_EVENT_MAP_PARENT] > image->tables [MONO_TABLE_TYPEDEF].rows)
1351 ADD_ERROR (list, g_strdup_printf ("Parent 0x%08x is invalid in Event Map row %d", cols [MONO_EVENT_MAP_PARENT], i + 1));
1352 if (cols [MONO_EVENT_MAP_EVENTLIST] > image->tables [MONO_TABLE_EVENT].rows)
1353 ADD_ERROR (list, g_strdup_printf ("EventList 0x%08x is invalid in Event Map row %d", cols [MONO_EVENT_MAP_EVENTLIST], i + 1));
1355 if (cols [MONO_EVENT_MAP_EVENTLIST] <= last_event)
1356 ADD_ERROR (list, g_strdup_printf ("EventList overlap in Event Map row %d", i + 1));
1357 last_event = cols [MONO_EVENT_MAP_EVENTLIST];
1361 g_hash_table_destroy (dups);
1366 verify_event_table (MonoImage *image, GSList *list, int level)
1368 MonoTableInfo *t = &image->tables [MONO_TABLE_EVENT];
1369 guint32 cols [MONO_EVENT_SIZE];
1373 for (i = 0; i < t->rows; ++i) {
1374 mono_metadata_decode_row (t, i, cols, MONO_EVENT_SIZE);
1376 if (cols [MONO_EVENT_FLAGS] & ~(EVENT_SPECIALNAME|EVENT_RTSPECIALNAME)) {
1377 if (level & MONO_VERIFY_ERROR)
1378 ADD_ERROR (list, g_strdup_printf ("Flags 0x%04x invalid in Event row %d", cols [MONO_EVENT_FLAGS], i + 1));
1380 if (!(p = is_valid_string (image, cols [MONO_EVENT_NAME], TRUE))) {
1381 if (level & MONO_VERIFY_ERROR)
1382 ADD_ERROR (list, g_strdup_printf ("Invalid name in Event row %d", i + 1));
1384 if (level & MONO_VERIFY_CLS) {
1385 if (!is_valid_cls_ident (p))
1386 ADD_WARN (list, MONO_VERIFY_CLS, g_strdup_printf ("Invalid CLS name '%s` in Event row %d", p, i + 1));
1390 if (level & MONO_VERIFY_ERROR && cols [MONO_EVENT_TYPE]) {
1391 value = cols [MONO_EVENT_TYPE] >> MONO_TYPEDEFORREF_BITS;
1392 switch (cols [MONO_EVENT_TYPE] & MONO_TYPEDEFORREF_MASK) {
1393 case MONO_TYPEDEFORREF_TYPEDEF:
1394 if (!value || value > image->tables [MONO_TABLE_TYPEDEF].rows)
1395 ADD_ERROR (list, g_strdup_printf ("Type invalid in Event row %d", i + 1));
1397 case MONO_TYPEDEFORREF_TYPEREF:
1398 if (!value || value > image->tables [MONO_TABLE_TYPEREF].rows)
1399 ADD_ERROR (list, g_strdup_printf ("Type invalid in Event row %d", i + 1));
1401 case MONO_TYPEDEFORREF_TYPESPEC:
1402 if (!value || value > image->tables [MONO_TABLE_TYPESPEC].rows)
1403 ADD_ERROR (list, g_strdup_printf ("Type invalid in Event row %d", i + 1));
1406 ADD_ERROR (list, g_strdup_printf ("Type invalid in Event row %d", i + 1));
1410 * FIXME: check that there is 1 add and remove row in methodsemantics
1411 * and 0 or 1 raise and 0 or more other (maybe it's better to check for
1412 * these while checking methodsemantics).
1413 * check for duplicated names for the same type [ERROR]
1414 * check for CLS duplicate names for the same type [CLS]
1421 verify_field_table (MonoImage *image, GSList *list, int level)
1423 MonoTableInfo *t = &image->tables [MONO_TABLE_FIELD];
1424 guint32 cols [MONO_FIELD_SIZE];
1428 for (i = 0; i < t->rows; ++i) {
1429 mono_metadata_decode_row (t, i, cols, MONO_FIELD_SIZE);
1431 * Check this field has only one owner and that the owner is not
1432 * an interface (done in verify_typedef_table() )
1434 flags = cols [MONO_FIELD_FLAGS];
1435 switch (flags & FIELD_ATTRIBUTE_FIELD_ACCESS_MASK) {
1436 case FIELD_ATTRIBUTE_COMPILER_CONTROLLED:
1437 case FIELD_ATTRIBUTE_PRIVATE:
1438 case FIELD_ATTRIBUTE_FAM_AND_ASSEM:
1439 case FIELD_ATTRIBUTE_ASSEMBLY:
1440 case FIELD_ATTRIBUTE_FAMILY:
1441 case FIELD_ATTRIBUTE_FAM_OR_ASSEM:
1442 case FIELD_ATTRIBUTE_PUBLIC:
1445 if (level & MONO_VERIFY_ERROR)
1446 ADD_ERROR (list, g_strdup_printf ("Invalid access mask in Field row %d", i + 1));
1449 if (level & MONO_VERIFY_ERROR) {
1450 if ((flags & FIELD_ATTRIBUTE_LITERAL) && (flags & FIELD_ATTRIBUTE_INIT_ONLY))
1451 ADD_ERROR (list, g_strdup_printf ("Literal and InitOnly cannot be both set in Field row %d", i + 1));
1452 if ((flags & FIELD_ATTRIBUTE_LITERAL) && !(flags & FIELD_ATTRIBUTE_STATIC))
1453 ADD_ERROR (list, g_strdup_printf ("Literal needs also Static set in Field row %d", i + 1));
1454 if ((flags & FIELD_ATTRIBUTE_RT_SPECIAL_NAME) && !(flags & FIELD_ATTRIBUTE_SPECIAL_NAME))
1455 ADD_ERROR (list, g_strdup_printf ("RTSpecialName needs also SpecialName set in Field row %d", i + 1));
1457 * FIXME: check there is only one owner in the respective table.
1458 * if (flags & FIELD_ATTRIBUTE_HAS_FIELD_MARSHAL)
1459 * if (flags & FIELD_ATTRIBUTE_HAS_DEFAULT)
1460 * if (flags & FIELD_ATTRIBUTE_HAS_FIELD_RVA)
1463 if (!(p = is_valid_string (image, cols [MONO_FIELD_NAME], TRUE))) {
1464 if (level & MONO_VERIFY_ERROR)
1465 ADD_ERROR (list, g_strdup_printf ("Invalid name in Field row %d", i + 1));
1467 if (level & MONO_VERIFY_CLS) {
1468 if (!is_valid_cls_ident (p))
1469 ADD_WARN (list, MONO_VERIFY_CLS, g_strdup_printf ("Invalid CLS name '%s` in Field row %d", p, i + 1));
1474 * if owner is module needs to be static, access mask needs to be compilercontrolled,
1475 * public or private (not allowed in cls mode).
1476 * if owner is an enum ...
1485 verify_file_table (MonoImage *image, GSList *list, int level)
1487 MonoTableInfo *t = &image->tables [MONO_TABLE_FILE];
1488 guint32 cols [MONO_FILE_SIZE];
1491 GHashTable *dups = g_hash_table_new (g_str_hash, g_str_equal);
1493 for (i = 0; i < t->rows; ++i) {
1494 mono_metadata_decode_row (t, i, cols, MONO_FILE_SIZE);
1495 if (level & MONO_VERIFY_ERROR) {
1496 if (cols [MONO_FILE_FLAGS] != FILE_CONTAINS_METADATA && cols [MONO_FILE_FLAGS] != FILE_CONTAINS_NO_METADATA)
1497 ADD_ERROR (list, g_strdup_printf ("Invalid flags in File row %d", i + 1));
1498 if (!is_valid_blob (image, cols [MONO_FILE_HASH_VALUE], TRUE))
1499 ADD_ERROR (list, g_strdup_printf ("File hash value in row %d is invalid or not null and empty", i + 1));
1501 if (!(p = is_valid_string (image, cols [MONO_FILE_NAME], TRUE))) {
1502 if (level & MONO_VERIFY_ERROR)
1503 ADD_ERROR (list, g_strdup_printf ("Invalid name in File row %d", i + 1));
1505 if (level & MONO_VERIFY_ERROR) {
1506 if (!is_valid_filename (p))
1507 ADD_ERROR (list, g_strdup_printf ("Invalid name '%s` in File row %d", p, i + 1));
1508 else if (g_hash_table_lookup (dups, p)) {
1509 ADD_ERROR (list, g_strdup_printf ("Duplicate name '%s` in File row %d", p, i + 1));
1511 g_hash_table_insert (dups, (gpointer)p, (gpointer)p);
1515 * FIXME: I don't understand what this means:
1516 * If this module contains a row in the Assembly table (that is, if this module "holds the manifest")
1517 * then there shall not be any row in the File table for this module - i.e., no self-reference [ERROR]
1521 if (level & MONO_VERIFY_WARNING) {
1522 if (!t->rows && image->tables [MONO_TABLE_EXPORTEDTYPE].rows)
1523 ADD_WARN (list, MONO_VERIFY_WARNING, g_strdup ("ExportedType table should be empty if File table is empty"));
1525 g_hash_table_destroy (dups);
1530 verify_moduleref_table (MonoImage *image, GSList *list, int level)
1532 MonoTableInfo *t = &image->tables [MONO_TABLE_MODULEREF];
1533 MonoTableInfo *tfile = &image->tables [MONO_TABLE_FILE];
1534 guint32 cols [MONO_MODULEREF_SIZE];
1536 guint32 found, i, j, value;
1537 GHashTable *dups = g_hash_table_new (g_str_hash, g_str_equal);
1539 for (i = 0; i < t->rows; ++i) {
1540 mono_metadata_decode_row (t, i, cols, MONO_MODULEREF_SIZE);
1541 if (!(p = is_valid_string (image, cols [MONO_MODULEREF_NAME], TRUE))) {
1542 if (level & MONO_VERIFY_ERROR)
1543 ADD_ERROR (list, g_strdup_printf ("Invalid name in ModuleRef row %d", i + 1));
1545 if (level & MONO_VERIFY_ERROR) {
1546 if (!is_valid_filename (p))
1547 ADD_ERROR (list, g_strdup_printf ("Invalid name '%s` in ModuleRef row %d", p, i + 1));
1548 else if (g_hash_table_lookup (dups, p)) {
1549 ADD_WARN (list, MONO_VERIFY_WARNING, g_strdup_printf ("Duplicate name '%s` in ModuleRef row %d", p, i + 1));
1550 g_hash_table_insert (dups, (gpointer)p, (gpointer)p);
1552 for (j = 0; j < tfile->rows; ++j) {
1553 value = mono_metadata_decode_row_col (tfile, j, MONO_FILE_NAME);
1554 if ((pf = is_valid_string (image, value, TRUE)))
1555 if (strcmp (p, pf) == 0) {
1561 ADD_ERROR (list, g_strdup_printf ("Name '%s` in ModuleRef row %d doesn't have a match in File table", p, i + 1));
1566 g_hash_table_destroy (dups);
1571 verify_standalonesig_table (MonoImage *image, GSList *list, int level)
1573 MonoTableInfo *t = &image->tables [MONO_TABLE_STANDALONESIG];
1574 guint32 cols [MONO_STAND_ALONE_SIGNATURE_SIZE];
1578 for (i = 0; i < t->rows; ++i) {
1579 mono_metadata_decode_row (t, i, cols, MONO_STAND_ALONE_SIGNATURE_SIZE);
1580 if (level & MONO_VERIFY_ERROR) {
1581 if (!is_valid_blob (image, cols [MONO_STAND_ALONE_SIGNATURE], TRUE)) {
1582 ADD_ERROR (list, g_strdup_printf ("Signature is invalid in StandAloneSig row %d", i + 1));
1584 p = mono_metadata_blob_heap (image, cols [MONO_STAND_ALONE_SIGNATURE]);
1585 /* FIXME: check it's a valid locals or method sig.*/
1593 mono_image_verify_tables (MonoImage *image, int level)
1595 GSList *error_list = NULL;
1597 error_list = verify_assembly_table (image, error_list, level);
1599 * AssemblyOS, AssemblyProcessor, AssemblyRefOs and
1600 * AssemblyRefProcessor should be ignored,
1601 * though we may want to emit a warning, since it should not
1602 * be present in a PE file.
1604 error_list = verify_assemblyref_table (image, error_list, level);
1605 error_list = verify_class_layout_table (image, error_list, level);
1606 error_list = verify_constant_table (image, error_list, level);
1608 * cutom attribute, declsecurity
1610 error_list = verify_event_map_table (image, error_list, level);
1611 error_list = verify_event_table (image, error_list, level);
1612 error_list = verify_field_table (image, error_list, level);
1613 error_list = verify_file_table (image, error_list, level);
1614 error_list = verify_moduleref_table (image, error_list, level);
1615 error_list = verify_standalonesig_table (image, error_list, level);
1617 return g_slist_reverse (error_list);
1620 #define ADD_INVALID(list,msg) \
1622 MonoVerifyInfoExtended *vinfo = g_new (MonoVerifyInfoExtended, 1); \
1623 vinfo->status = MONO_VERIFY_ERROR; \
1624 vinfo->message = (msg); \
1625 (list) = g_slist_prepend ((list), vinfo); \
1626 /*G_BREAKPOINT ();*/ \
1630 #define CHECK_STACK_UNDERFLOW(num) \
1632 if (cur_stack < (num)) \
1633 ADD_INVALID (list, g_strdup_printf ("Stack underflow at 0x%04x (%d items instead of %d)", ip_offset, cur_stack, (num))); \
1636 #define CHECK_STACK_OVERFLOW() \
1638 if (cur_stack >= max_stack) \
1639 ADD_INVALID (list, g_strdup_printf ("Maxstack exceeded at 0x%04x", ip_offset)); \
1644 in_any_block (MonoMethodHeader *header, guint offset)
1647 MonoExceptionClause *clause;
1649 for (i = 0; i < header->num_clauses; ++i) {
1650 clause = &header->clauses [i];
1651 if (MONO_OFFSET_IN_CLAUSE (clause, offset))
1653 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1655 if (MONO_OFFSET_IN_FILTER (clause, offset))
1662 * in_any_exception_block:
1664 * Returns TRUE is @offset is part of any exception clause (filter, handler, catch, finally or fault).
1667 in_any_exception_block (MonoMethodHeader *header, guint offset)
1670 MonoExceptionClause *clause;
1672 for (i = 0; i < header->num_clauses; ++i) {
1673 clause = &header->clauses [i];
1674 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1676 if (MONO_OFFSET_IN_FILTER (clause, offset))
1683 * is_valid_branch_instruction:
1685 * Verify if it's valid to perform a branch from @offset to @target.
1686 * This should be used with br and brtrue/false.
1687 * It returns 0 if valid, 1 for unverifiable and 2 for invalid.
1688 * The major diferent from other similiar functions is that branching into a
1689 * finally/fault block is invalid instead of just unverifiable.
1692 is_valid_branch_instruction (MonoMethodHeader *header, guint offset, guint target)
1695 MonoExceptionClause *clause;
1697 for (i = 0; i < header->num_clauses; ++i) {
1698 clause = &header->clauses [i];
1699 /*branching into a finally block is invalid*/
1700 if ((clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY || clause->flags == MONO_EXCEPTION_CLAUSE_FAULT) &&
1701 !MONO_OFFSET_IN_HANDLER (clause, offset) &&
1702 MONO_OFFSET_IN_HANDLER (clause, target))
1705 if (clause->try_offset != target && (MONO_OFFSET_IN_CLAUSE (clause, offset) ^ MONO_OFFSET_IN_CLAUSE (clause, target)))
1707 if (MONO_OFFSET_IN_HANDLER (clause, offset) ^ MONO_OFFSET_IN_HANDLER (clause, target))
1709 if (MONO_OFFSET_IN_FILTER (clause, offset) ^ MONO_OFFSET_IN_FILTER (clause, target))
1716 * is_valid_cmp_branch_instruction:
1718 * Verify if it's valid to perform a branch from @offset to @target.
1719 * This should be used with binary comparison branching instruction, like beq, bge and similars.
1720 * It returns 0 if valid, 1 for unverifiable and 2 for invalid.
1722 * The major diferences from other similar functions are that most errors lead to invalid
1723 * code and only branching out of finally, filter or fault clauses is unverifiable.
1726 is_valid_cmp_branch_instruction (MonoMethodHeader *header, guint offset, guint target)
1729 MonoExceptionClause *clause;
1731 for (i = 0; i < header->num_clauses; ++i) {
1732 clause = &header->clauses [i];
1733 /*branching out of a handler or finally*/
1734 if (clause->flags != MONO_EXCEPTION_CLAUSE_NONE &&
1735 MONO_OFFSET_IN_HANDLER (clause, offset) &&
1736 !MONO_OFFSET_IN_HANDLER (clause, target))
1739 if (clause->try_offset != target && (MONO_OFFSET_IN_CLAUSE (clause, offset) ^ MONO_OFFSET_IN_CLAUSE (clause, target)))
1741 if (MONO_OFFSET_IN_HANDLER (clause, offset) ^ MONO_OFFSET_IN_HANDLER (clause, target))
1743 if (MONO_OFFSET_IN_FILTER (clause, offset) ^ MONO_OFFSET_IN_FILTER (clause, target))
1750 * A leave can't escape a finally block
1753 is_correct_leave (MonoMethodHeader *header, guint offset, guint target)
1756 MonoExceptionClause *clause;
1758 for (i = 0; i < header->num_clauses; ++i) {
1759 clause = &header->clauses [i];
1760 if (clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY && MONO_OFFSET_IN_HANDLER (clause, offset) && !MONO_OFFSET_IN_HANDLER (clause, target))
1762 if (MONO_OFFSET_IN_FILTER (clause, offset))
1769 * A rethrow can't happen outside of a catch handler.
1772 is_correct_rethrow (MonoMethodHeader *header, guint offset)
1775 MonoExceptionClause *clause;
1777 for (i = 0; i < header->num_clauses; ++i) {
1778 clause = &header->clauses [i];
1779 if (MONO_OFFSET_IN_HANDLER (clause, offset))
1781 if (MONO_OFFSET_IN_FILTER (clause, offset))
1788 * An endfinally can't happen outside of a finally/fault handler.
1791 is_correct_endfinally (MonoMethodHeader *header, guint offset)
1794 MonoExceptionClause *clause;
1796 for (i = 0; i < header->num_clauses; ++i) {
1797 clause = &header->clauses [i];
1798 if (MONO_OFFSET_IN_HANDLER (clause, offset) && (clause->flags == MONO_EXCEPTION_CLAUSE_FAULT || clause->flags == MONO_EXCEPTION_CLAUSE_FINALLY))
1806 * An endfilter can only happens inside a filter clause.
1807 * In non-strict mode filter is allowed inside the handler clause too
1809 static MonoExceptionClause *
1810 is_correct_endfilter (VerifyContext *ctx, guint offset)
1813 MonoExceptionClause *clause;
1815 for (i = 0; i < ctx->header->num_clauses; ++i) {
1816 clause = &ctx->header->clauses [i];
1817 if (clause->flags != MONO_EXCEPTION_CLAUSE_FILTER)
1819 if (MONO_OFFSET_IN_FILTER (clause, offset))
1821 if (!IS_STRICT_MODE (ctx) && MONO_OFFSET_IN_HANDLER (clause, offset))
1829 * Non-strict endfilter can happens inside a try block or any handler block
1832 is_unverifiable_endfilter (VerifyContext *ctx, guint offset)
1835 MonoExceptionClause *clause;
1837 for (i = 0; i < ctx->header->num_clauses; ++i) {
1838 clause = &ctx->header->clauses [i];
1839 if (MONO_OFFSET_IN_CLAUSE (clause, offset))
1846 is_valid_bool_arg (ILStackDesc *arg)
1848 if (stack_slot_is_managed_pointer (arg) || stack_slot_is_boxed_value (arg) || stack_slot_is_null_literal (arg))
1852 switch (stack_slot_get_underlying_type (arg)) {
1855 case TYPE_NATIVE_INT:
1859 g_assert (arg->type);
1860 switch (arg->type->type) {
1861 case MONO_TYPE_CLASS:
1862 case MONO_TYPE_STRING:
1863 case MONO_TYPE_OBJECT:
1864 case MONO_TYPE_SZARRAY:
1865 case MONO_TYPE_ARRAY:
1866 case MONO_TYPE_FNPTR:
1869 case MONO_TYPE_GENERICINST:
1870 /*We need to check if the container class
1871 * of the generic type is a valuetype, iow:
1872 * is it a "class Foo<T>" or a "struct Foo<T>"?
1874 return !arg->type->data.generic_class->container_class->valuetype;
1882 /*Type manipulation helper*/
1884 /*Returns the byref version of the supplied MonoType*/
1886 mono_type_get_type_byref (MonoType *type)
1890 return &mono_class_from_mono_type (type)->this_arg;
1894 /*Returns the byval version of the supplied MonoType*/
1896 mono_type_get_type_byval (MonoType *type)
1900 return &mono_class_from_mono_type (type)->byval_arg;
1904 mono_type_from_stack_slot (ILStackDesc *slot)
1906 if (stack_slot_is_managed_pointer (slot))
1907 return mono_type_get_type_byref (slot->type);
1911 /*Stack manipulation code*/
1914 stack_init (VerifyContext *ctx, ILCodeDesc *state)
1916 if (state->flags & IL_CODE_FLAG_STACK_INITED)
1919 state->flags |= IL_CODE_FLAG_STACK_INITED;
1921 state->stack = g_new0 (ILStackDesc, ctx->max_stack);
1925 stack_copy (ILCodeDesc *to, ILCodeDesc *from)
1927 to->size = from->size;
1928 memcpy (to->stack, from->stack, sizeof (ILStackDesc) * from->size);
1932 copy_stack_value (ILStackDesc *to, ILStackDesc *from)
1934 to->stype = from->stype;
1935 to->type = from->type;
1936 to->method = from->method;
1940 check_underflow (VerifyContext *ctx, int size)
1942 if (ctx->eval.size < size) {
1943 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack underflow, required %d, but have %d at 0x%04x", size, ctx->eval.size, ctx->ip_offset));
1950 check_overflow (VerifyContext *ctx)
1952 if (ctx->eval.size >= ctx->max_stack) {
1953 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have stack-depth %d at 0x%04x", ctx->eval.size + 1, ctx->ip_offset));
1959 /*This reject out PTR, FNPTR and TYPEDBYREF*/
1961 check_unmanaged_pointer (VerifyContext *ctx, ILStackDesc *value)
1963 if (stack_slot_get_type (value) == TYPE_PTR) {
1964 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unmanaged pointer is not a verifiable type at 0x%04x", ctx->ip_offset));
1970 /*TODO verify if MONO_TYPE_TYPEDBYREF is not allowed here as well.*/
1972 check_unverifiable_type (VerifyContext *ctx, MonoType *type)
1974 if (type->type == MONO_TYPE_PTR || type->type == MONO_TYPE_FNPTR) {
1975 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unmanaged pointer is not a verifiable type at 0x%04x", ctx->ip_offset));
1982 static ILStackDesc *
1983 stack_push (VerifyContext *ctx)
1985 g_assert (ctx->eval.size < ctx->max_stack);
1986 return & ctx->eval.stack [ctx->eval.size++];
1989 static ILStackDesc *
1990 stack_push_val (VerifyContext *ctx, int stype, MonoType *type)
1992 ILStackDesc *top = stack_push (ctx);
1998 static ILStackDesc *
1999 stack_pop (VerifyContext *ctx)
2002 g_assert (ctx->eval.size > 0);
2003 ret = ctx->eval.stack + --ctx->eval.size;
2004 if ((ret->stype & UNINIT_THIS_MASK) == UNINIT_THIS_MASK)
2005 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Found use of uninitialized 'this ptr' ref at 0x%04x", ctx->ip_offset));
2009 /* This function allows to safely pop an unititialized this ptr from
2010 * the eval stack without marking the method as unverifiable.
2012 static ILStackDesc *
2013 stack_pop_safe (VerifyContext *ctx)
2015 g_assert (ctx->eval.size > 0);
2016 return ctx->eval.stack + --ctx->eval.size;
2019 static ILStackDesc *
2020 stack_push_stack_val (VerifyContext *ctx, ILStackDesc *value)
2022 ILStackDesc *top = stack_push (ctx);
2023 copy_stack_value (top, value);
2027 /* Returns the MonoType associated with the token, or NULL if it is invalid.
2029 * A boxable type can be either a reference or value type, but cannot be a byref type or an unmanaged pointer
2032 get_boxable_mono_type (VerifyContext* ctx, int token, const char *opcode)
2037 if (!(type = verifier_load_type (ctx, token, opcode)))
2040 if (type->byref && type->type != MONO_TYPE_TYPEDBYREF) {
2041 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of byref type for %s at 0x%04x", opcode, ctx->ip_offset));
2045 if (type->type == MONO_TYPE_VOID) {
2046 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of void type for %s at 0x%04x", opcode, ctx->ip_offset));
2050 if (type->type == MONO_TYPE_TYPEDBYREF)
2051 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid use of typedbyref for %s at 0x%04x", opcode, ctx->ip_offset));
2053 if (!(class = mono_class_from_mono_type (type)))
2054 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Could not retrieve type token for %s at 0x%04x", opcode, ctx->ip_offset));
2056 if (class->generic_container && type->type != MONO_TYPE_GENERICINST)
2057 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));
2059 check_unverifiable_type (ctx, type);
2064 /*operation result tables */
2066 static const unsigned char bin_op_table [TYPE_MAX][TYPE_MAX] = {
2067 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
2068 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2069 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
2070 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
2071 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2072 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2075 static const unsigned char add_table [TYPE_MAX][TYPE_MAX] = {
2076 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
2077 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2078 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
2079 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
2080 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_INV, TYPE_INV},
2081 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2084 static const unsigned char sub_table [TYPE_MAX][TYPE_MAX] = {
2085 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
2086 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2087 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
2088 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV},
2089 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_NATIVE_INT | NON_VERIFIABLE_RESULT, TYPE_INV},
2090 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2093 static const unsigned char int_bin_op_table [TYPE_MAX][TYPE_MAX] = {
2094 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
2095 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2096 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
2097 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2098 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2099 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2102 static const unsigned char shift_op_table [TYPE_MAX][TYPE_MAX] = {
2103 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
2104 {TYPE_I8, TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV},
2105 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
2106 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2107 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2108 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2111 static const unsigned char cmp_br_op [TYPE_MAX][TYPE_MAX] = {
2112 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
2113 {TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2114 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
2115 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV},
2116 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV},
2117 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2120 static const unsigned char cmp_br_eq_op [TYPE_MAX][TYPE_MAX] = {
2121 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV},
2122 {TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2123 {TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_I4 | NON_VERIFIABLE_RESULT, TYPE_INV},
2124 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV},
2125 {TYPE_INV, TYPE_INV, TYPE_I4 | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_I4, TYPE_INV},
2126 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_I4},
2129 static const unsigned char add_ovf_un_table [TYPE_MAX][TYPE_MAX] = {
2130 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
2131 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2132 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV},
2133 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2134 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_INV, TYPE_INV},
2135 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2138 static const unsigned char sub_ovf_un_table [TYPE_MAX][TYPE_MAX] = {
2139 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
2140 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2141 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
2142 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2143 {TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_PTR | NON_VERIFIABLE_RESULT, TYPE_INV, TYPE_NATIVE_INT | NON_VERIFIABLE_RESULT, TYPE_INV},
2144 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2147 static const unsigned char bin_ovf_table [TYPE_MAX][TYPE_MAX] = {
2148 {TYPE_I4, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
2149 {TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2150 {TYPE_NATIVE_INT, TYPE_INV, TYPE_NATIVE_INT, TYPE_INV, TYPE_INV, TYPE_INV},
2151 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2152 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2153 {TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
2156 #ifdef MONO_VERIFIER_DEBUG
2160 dump_stack_value (ILStackDesc *value)
2162 printf ("[(%x)(%x)", value->type->type, value->stype);
2164 if (stack_slot_is_this_pointer (value))
2167 if (stack_slot_is_boxed_value (value))
2168 printf ("[boxed] ");
2170 if (stack_slot_is_null_literal (value))
2173 if (stack_slot_is_managed_mutability_pointer (value))
2174 printf ("Controled Mutability MP: ");
2176 if (stack_slot_is_managed_pointer (value))
2177 printf ("Managed Pointer to: ");
2179 switch (stack_slot_get_underlying_type (value)) {
2181 printf ("invalid type]");
2189 case TYPE_NATIVE_INT:
2190 printf ("native int]");
2193 printf ("float64]");
2196 printf ("unmanaged pointer]");
2199 switch (value->type->type) {
2200 case MONO_TYPE_CLASS:
2201 case MONO_TYPE_VALUETYPE:
2202 printf ("complex] (%s)", value->type->data.klass->name);
2204 case MONO_TYPE_STRING:
2205 printf ("complex] (string)");
2207 case MONO_TYPE_OBJECT:
2208 printf ("complex] (object)");
2210 case MONO_TYPE_SZARRAY:
2211 printf ("complex] (%s [])", value->type->data.klass->name);
2213 case MONO_TYPE_ARRAY:
2214 printf ("complex] (%s [%d %d %d])",
2215 value->type->data.array->eklass->name,
2216 value->type->data.array->rank,
2217 value->type->data.array->numsizes,
2218 value->type->data.array->numlobounds);
2220 case MONO_TYPE_GENERICINST:
2221 printf ("complex] (inst of %s )", value->type->data.generic_class->container_class->name);
2224 printf ("complex] (type generic param !%d - %s) ", value->type->data.generic_param->num, mono_generic_param_info (value->type->data.generic_param)->name);
2226 case MONO_TYPE_MVAR:
2227 printf ("complex] (method generic param !!%d - %s) ", value->type->data.generic_param->num, mono_generic_param_info (value->type->data.generic_param)->name);
2230 //should be a boxed value
2231 char * name = mono_type_full_name (value->type);
2232 printf ("complex] %s", name);
2238 printf ("unknown stack %x type]\n", value->stype);
2239 g_assert_not_reached ();
2244 dump_stack_state (ILCodeDesc *state)
2248 printf ("(%d) ", state->size);
2249 for (i = 0; i < state->size; ++i)
2250 dump_stack_value (state->stack + i);
2255 /*Returns TRUE if candidate array type can be assigned to target.
2256 *Both parameters MUST be of type MONO_TYPE_ARRAY (target->type == MONO_TYPE_ARRAY)
2259 is_array_type_compatible (MonoType *target, MonoType *candidate)
2261 MonoArrayType *left = target->data.array;
2262 MonoArrayType *right = candidate->data.array;
2264 g_assert (target->type == MONO_TYPE_ARRAY);
2265 g_assert (candidate->type == MONO_TYPE_ARRAY);
2267 if (left->rank != right->rank)
2270 return mono_class_is_assignable_from (left->eklass, right->eklass);
2274 get_stack_type (MonoType *type)
2277 int type_kind = type->type;
2279 mask = POINTER_MASK;
2280 /*TODO handle CMMP_MASK */
2283 switch (type_kind) {
2286 case MONO_TYPE_BOOLEAN:
2289 case MONO_TYPE_CHAR:
2292 return TYPE_I4 | mask;
2296 return TYPE_NATIVE_INT | mask;
2298 /* FIXME: the spec says that you cannot have a pointer to method pointer, do we need to check this here? */
2299 case MONO_TYPE_FNPTR:
2301 case MONO_TYPE_TYPEDBYREF:
2302 return TYPE_PTR | mask;
2305 case MONO_TYPE_MVAR:
2307 case MONO_TYPE_CLASS:
2308 case MONO_TYPE_STRING:
2309 case MONO_TYPE_OBJECT:
2310 case MONO_TYPE_SZARRAY:
2311 case MONO_TYPE_ARRAY:
2312 return TYPE_COMPLEX | mask;
2314 case MONO_TYPE_GENERICINST:
2315 if (mono_type_is_enum_type (type)) {
2316 type = mono_type_get_underlying_type_any (type);
2317 type_kind = type->type;
2320 return TYPE_COMPLEX | mask;
2325 return TYPE_I8 | mask;
2329 return TYPE_R8 | mask;
2331 case MONO_TYPE_VALUETYPE:
2332 if (mono_type_is_enum_type (type)) {
2333 type = mono_type_get_underlying_type_any (type);
2334 type_kind = type->type;
2337 return TYPE_COMPLEX | mask;
2345 /* convert MonoType to ILStackDesc format (stype) */
2347 set_stack_value (VerifyContext *ctx, ILStackDesc *stack, MonoType *type, int take_addr)
2350 int type_kind = type->type;
2352 if (type->byref || take_addr)
2353 mask = POINTER_MASK;
2354 /* TODO handle CMMP_MASK */
2359 switch (type_kind) {
2362 case MONO_TYPE_BOOLEAN:
2365 case MONO_TYPE_CHAR:
2368 stack->stype = TYPE_I4 | mask;
2372 stack->stype = TYPE_NATIVE_INT | mask;
2375 /*FIXME: Do we need to check if it's a pointer to the method pointer? The spec says it' illegal to have that.*/
2376 case MONO_TYPE_FNPTR:
2378 case MONO_TYPE_TYPEDBYREF:
2379 stack->stype = TYPE_PTR | mask;
2382 case MONO_TYPE_CLASS:
2383 case MONO_TYPE_STRING:
2384 case MONO_TYPE_OBJECT:
2385 case MONO_TYPE_SZARRAY:
2386 case MONO_TYPE_ARRAY:
2389 case MONO_TYPE_MVAR:
2390 stack->stype = TYPE_COMPLEX | mask;
2393 case MONO_TYPE_GENERICINST:
2394 if (mono_type_is_enum_type (type)) {
2395 type = mono_type_get_underlying_type_any (type);
2396 type_kind = type->type;
2399 stack->stype = TYPE_COMPLEX | mask;
2405 stack->stype = TYPE_I8 | mask;
2409 stack->stype = TYPE_R8 | mask;
2411 case MONO_TYPE_VALUETYPE:
2412 if (mono_type_is_enum_type (type)) {
2413 type = mono_type_get_underlying_type_any (type);
2414 type_kind = type->type;
2417 stack->stype = TYPE_COMPLEX | mask;
2421 VERIFIER_DEBUG ( printf ("unknown type 0x%02x in eval stack type\n", type->type); );
2422 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Illegal value set on stack 0x%02x at %d", type->type, ctx->ip_offset));
2429 * init_stack_with_value_at_exception_boundary:
2431 * Initialize the stack and push a given type.
2432 * The instruction is marked as been on the exception boundary.
2435 init_stack_with_value_at_exception_boundary (VerifyContext *ctx, ILCodeDesc *code, MonoClass *klass)
2438 MonoType *type = mono_class_inflate_generic_type_checked (&klass->byval_arg, ctx->generic_context, &error);
2440 if (!mono_error_ok (&error)) {
2441 char *name = mono_type_get_full_name (klass);
2442 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid class %s used for exception", name));
2444 mono_error_cleanup (&error);
2448 if (!ctx->max_stack) {
2449 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack overflow at 0x%04x", ctx->ip_offset));
2453 stack_init (ctx, code);
2454 set_stack_value (ctx, code->stack, type, FALSE);
2455 ctx->exception_types = g_slist_prepend (ctx->exception_types, type);
2457 code->flags |= IL_CODE_FLAG_WAS_TARGET;
2458 if (mono_type_is_generic_argument (type))
2459 code->stack->stype |= BOXED_MASK;
2462 /*Verify if type 'candidate' can be stored in type 'target'.
2464 * If strict, check for the underlying type and not the verification stack types
2467 verify_type_compatibility_full (VerifyContext *ctx, MonoType *target, MonoType *candidate, gboolean strict)
2469 #define IS_ONE_OF3(T, A, B, C) (T == A || T == B || T == C)
2470 #define IS_ONE_OF2(T, A, B) (T == A || T == B)
2472 MonoType *original_candidate = candidate;
2473 VERIFIER_DEBUG ( printf ("checking type compatibility %s x %s strict %d\n", mono_type_full_name (target), mono_type_full_name (candidate), strict); );
2475 /*only one is byref */
2476 if (candidate->byref ^ target->byref) {
2477 /* converting from native int to byref*/
2478 if (get_stack_type (candidate) == TYPE_NATIVE_INT && target->byref) {
2479 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("using byref native int at 0x%04x", ctx->ip_offset));
2484 strict |= target->byref;
2485 /*From now on we don't care about byref anymore, so it's ok to discard it here*/
2486 candidate = mono_type_get_underlying_type_any (candidate);
2489 switch (target->type) {
2490 case MONO_TYPE_VOID:
2491 return candidate->type == MONO_TYPE_VOID;
2494 case MONO_TYPE_BOOLEAN:
2496 return IS_ONE_OF3 (candidate->type, MONO_TYPE_I1, MONO_TYPE_U1, MONO_TYPE_BOOLEAN);
2499 case MONO_TYPE_CHAR:
2501 return IS_ONE_OF3 (candidate->type, MONO_TYPE_I2, MONO_TYPE_U2, MONO_TYPE_CHAR);
2503 case MONO_TYPE_U4: {
2504 gboolean is_native_int = IS_ONE_OF2 (candidate->type, MONO_TYPE_I, MONO_TYPE_U);
2505 gboolean is_int4 = IS_ONE_OF2 (candidate->type, MONO_TYPE_I4, MONO_TYPE_U4);
2507 return is_native_int || is_int4;
2508 return is_native_int || get_stack_type (candidate) == TYPE_I4;
2513 return IS_ONE_OF2 (candidate->type, MONO_TYPE_I8, MONO_TYPE_U8);
2518 return candidate->type == target->type;
2519 return IS_ONE_OF2 (candidate->type, MONO_TYPE_R4, MONO_TYPE_R8);
2523 gboolean is_native_int = IS_ONE_OF2 (candidate->type, MONO_TYPE_I, MONO_TYPE_U);
2524 gboolean is_int4 = IS_ONE_OF2 (candidate->type, MONO_TYPE_I4, MONO_TYPE_U4);
2526 return is_native_int || is_int4;
2527 return is_native_int || get_stack_type (candidate) == TYPE_I4;
2531 if (candidate->type != MONO_TYPE_PTR)
2533 /* check the underlying type */
2534 return verify_type_compatibility_full (ctx, target->data.type, candidate->data.type, TRUE);
2536 case MONO_TYPE_FNPTR: {
2537 MonoMethodSignature *left, *right;
2538 if (candidate->type != MONO_TYPE_FNPTR)
2541 left = mono_type_get_signature (target);
2542 right = mono_type_get_signature (candidate);
2543 return mono_metadata_signature_equal (left, right) && left->call_convention == right->call_convention;
2546 case MONO_TYPE_GENERICINST: {
2547 MonoClass *target_klass;
2548 MonoClass *candidate_klass;
2549 if (mono_type_is_enum_type (target)) {
2550 target = mono_type_get_underlying_type_any (target);
2553 target_klass = mono_class_from_mono_type (target);
2554 candidate_klass = mono_class_from_mono_type (candidate);
2555 if (mono_class_is_nullable (target_klass)) {
2556 if (!mono_class_is_nullable (candidate_klass))
2558 return target_klass == candidate_klass;
2561 return mono_class_is_assignable_from (target_klass, candidate_klass);
2564 case MONO_TYPE_STRING:
2565 return candidate->type == MONO_TYPE_STRING;
2567 case MONO_TYPE_CLASS:
2569 * VAR / MVAR compatibility must be checked by verify_stack_type_compatibility
2570 * to take boxing status into account.
2572 if (mono_type_is_generic_argument (original_candidate))
2574 /* If candidate is an enum it should return true for System.Enum and supertypes.
2575 * That's why here we use the original type and not the underlying type.
2577 return mono_class_is_assignable_from (target->data.klass, mono_class_from_mono_type (original_candidate));
2579 case MONO_TYPE_OBJECT:
2580 return MONO_TYPE_IS_REFERENCE (candidate);
2582 case MONO_TYPE_SZARRAY: {
2585 if (candidate->type != MONO_TYPE_SZARRAY)
2588 left = mono_class_from_mono_type (target)->element_class;
2589 right = mono_class_from_mono_type (candidate)->element_class;
2590 return mono_class_is_assignable_from (left, right);
2593 case MONO_TYPE_ARRAY:
2594 if (candidate->type != MONO_TYPE_ARRAY)
2596 return is_array_type_compatible (target, candidate);
2598 case MONO_TYPE_TYPEDBYREF:
2599 return candidate->type == MONO_TYPE_TYPEDBYREF;
2601 case MONO_TYPE_VALUETYPE: {
2602 MonoClass *target_klass = mono_class_from_mono_type (target);
2603 MonoClass *candidate_klass = mono_class_from_mono_type (candidate);
2605 if (target_klass == candidate_klass)
2607 if (mono_type_is_enum_type (target)) {
2608 target = mono_type_get_underlying_type_any (target);
2615 if (candidate->type != MONO_TYPE_VAR)
2617 return mono_type_get_generic_param_num (candidate) == mono_type_get_generic_param_num (target);
2619 case MONO_TYPE_MVAR:
2620 if (candidate->type != MONO_TYPE_MVAR)
2622 return mono_type_get_generic_param_num (candidate) == mono_type_get_generic_param_num (target);
2625 VERIFIER_DEBUG ( printf ("unknown store type %d\n", target->type); );
2626 g_assert_not_reached ();
2635 verify_type_compatibility (VerifyContext *ctx, MonoType *target, MonoType *candidate)
2637 return verify_type_compatibility_full (ctx, target, candidate, FALSE);
2641 * Returns the generic param bound to the context been verified.
2644 static MonoGenericParam*
2645 get_generic_param (VerifyContext *ctx, MonoType *param)
2647 guint16 param_num = mono_type_get_generic_param_num (param);
2648 if (param->type == MONO_TYPE_VAR) {
2649 if (!ctx->generic_context->class_inst || ctx->generic_context->class_inst->type_argc <= param_num) {
2650 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid generic type argument %d", param_num));
2653 return ctx->generic_context->class_inst->type_argv [param_num]->data.generic_param;
2656 /*param must be a MVAR */
2657 if (!ctx->generic_context->method_inst || ctx->generic_context->method_inst->type_argc <= param_num) {
2658 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid generic method argument %d", param_num));
2661 return ctx->generic_context->method_inst->type_argv [param_num]->data.generic_param;
2665 * is_compatible_boxed_valuetype:
2667 * Returns TRUE if @candidate / @stack is a valid boxed valuetype.
2669 * @type The source type. It it tested to be of the proper type.
2670 * @candidate type of the boxed valuetype.
2671 * @stack stack slot of the boxed valuetype, separate from @candidade since one could be changed before calling this function
2672 * @strict if TRUE candidate must be boxed compatible to the target type
2676 is_compatible_boxed_valuetype (VerifyContext *ctx, MonoType *type, MonoType *candidate, ILStackDesc *stack, gboolean strict)
2678 if (!stack_slot_is_boxed_value (stack))
2680 if (type->byref || candidate->byref)
2683 if (mono_type_is_generic_argument (candidate)) {
2684 MonoGenericParam *param = get_generic_param (ctx, candidate);
2686 for (class = mono_generic_param_info (param)->constraints; class && *class; ++class) {
2687 if (verify_type_compatibility_full (ctx, type, mono_type_get_type_byval (& (*class)->byval_arg), FALSE))
2692 if (mono_type_is_generic_argument (type))
2698 return MONO_TYPE_IS_REFERENCE (type) && mono_class_is_assignable_from (mono_class_from_mono_type (type), mono_class_from_mono_type (candidate));
2702 verify_stack_type_compatibility_full (VerifyContext *ctx, MonoType *type, ILStackDesc *stack, gboolean drop_byref, gboolean valuetype_must_be_boxed)
2704 MonoType *candidate = mono_type_from_stack_slot (stack);
2705 if (MONO_TYPE_IS_REFERENCE (type) && !type->byref && stack_slot_is_null_literal (stack))
2708 if (is_compatible_boxed_valuetype (ctx, type, candidate, stack, TRUE))
2711 if (valuetype_must_be_boxed && !stack_slot_is_boxed_value (stack) && !MONO_TYPE_IS_REFERENCE (candidate))
2714 if (!valuetype_must_be_boxed && stack_slot_is_boxed_value (stack))
2718 return verify_type_compatibility_full (ctx, type, mono_type_get_type_byval (candidate), FALSE);
2720 return verify_type_compatibility_full (ctx, type, candidate, FALSE);
2724 verify_stack_type_compatibility (VerifyContext *ctx, MonoType *type, ILStackDesc *stack)
2726 return verify_stack_type_compatibility_full (ctx, type, stack, FALSE, FALSE);
2730 mono_delegate_type_equal (MonoType *target, MonoType *candidate)
2732 if (candidate->byref ^ target->byref)
2735 switch (target->type) {
2736 case MONO_TYPE_VOID:
2739 case MONO_TYPE_BOOLEAN:
2742 case MONO_TYPE_CHAR:
2751 case MONO_TYPE_STRING:
2752 case MONO_TYPE_TYPEDBYREF:
2753 return candidate->type == target->type;
2756 return mono_delegate_type_equal (target->data.type, candidate->data.type);
2758 case MONO_TYPE_FNPTR:
2759 if (candidate->type != MONO_TYPE_FNPTR)
2761 return mono_delegate_signature_equal (mono_type_get_signature (target), mono_type_get_signature (candidate), FALSE);
2763 case MONO_TYPE_GENERICINST: {
2764 MonoClass *target_klass;
2765 MonoClass *candidate_klass;
2766 target_klass = mono_class_from_mono_type (target);
2767 candidate_klass = mono_class_from_mono_type (candidate);
2768 /*FIXME handle nullables and enum*/
2769 return mono_class_is_assignable_from (target_klass, candidate_klass);
2771 case MONO_TYPE_OBJECT:
2772 return MONO_TYPE_IS_REFERENCE (candidate);
2774 case MONO_TYPE_CLASS:
2775 return mono_class_is_assignable_from(target->data.klass, mono_class_from_mono_type (candidate));
2777 case MONO_TYPE_SZARRAY:
2778 if (candidate->type != MONO_TYPE_SZARRAY)
2780 return mono_class_is_assignable_from (mono_class_from_mono_type (target)->element_class, mono_class_from_mono_type (candidate)->element_class);
2782 case MONO_TYPE_ARRAY:
2783 if (candidate->type != MONO_TYPE_ARRAY)
2785 return is_array_type_compatible (target, candidate);
2787 case MONO_TYPE_VALUETYPE:
2788 /*FIXME handle nullables and enum*/
2789 return mono_class_from_mono_type (candidate) == mono_class_from_mono_type (target);
2792 return candidate->type == MONO_TYPE_VAR && mono_type_get_generic_param_num (target) == mono_type_get_generic_param_num (candidate);
2795 case MONO_TYPE_MVAR:
2796 return candidate->type == MONO_TYPE_MVAR && mono_type_get_generic_param_num (target) == mono_type_get_generic_param_num (candidate);
2800 VERIFIER_DEBUG ( printf ("Unknown type %d. Implement me!\n", target->type); );
2801 g_assert_not_reached ();
2807 mono_delegate_param_equal (MonoType *delegate, MonoType *method)
2809 if (mono_metadata_type_equal_full (delegate, method, TRUE))
2812 return mono_delegate_type_equal (method, delegate);
2816 mono_delegate_ret_equal (MonoType *delegate, MonoType *method)
2818 if (mono_metadata_type_equal_full (delegate, method, TRUE))
2821 return mono_delegate_type_equal (delegate, method);
2825 * mono_delegate_signature_equal:
2827 * Compare two signatures in the way expected by delegates.
2829 * This function only exists due to the fact that it should ignore the 'has_this' part of the signature.
2831 * FIXME can this function be eliminated and proper metadata functionality be used?
2834 mono_delegate_signature_equal (MonoMethodSignature *delegate_sig, MonoMethodSignature *method_sig, gboolean is_static_ldftn)
2837 int method_offset = is_static_ldftn ? 1 : 0;
2839 if (delegate_sig->param_count + method_offset != method_sig->param_count)
2842 if (delegate_sig->call_convention != method_sig->call_convention)
2845 for (i = 0; i < delegate_sig->param_count; i++) {
2846 MonoType *p1 = delegate_sig->params [i];
2847 MonoType *p2 = method_sig->params [i + method_offset];
2849 if (!mono_delegate_param_equal (p1, p2))
2853 if (!mono_delegate_ret_equal (delegate_sig->ret, method_sig->ret))
2860 * verify_ldftn_delegate:
2862 * Verify properties of ldftn based delegates.
2865 verify_ldftn_delegate (VerifyContext *ctx, MonoClass *delegate, ILStackDesc *value, ILStackDesc *funptr)
2867 MonoMethod *method = funptr->method;
2869 /*ldftn non-final virtuals only allowed if method is not static,
2870 * the object is a this arg (comes from a ldarg.0), and there is no starg.0.
2871 * This rules doesn't apply if the object on stack is a boxed valuetype.
2873 if ((method->flags & METHOD_ATTRIBUTE_VIRTUAL) && !(method->flags & METHOD_ATTRIBUTE_FINAL) && !(method->klass->flags & TYPE_ATTRIBUTE_SEALED) && !stack_slot_is_boxed_value (value)) {
2874 /*A stdarg 0 must not happen, we fail here only in fail fast mode to avoid double error reports*/
2875 if (IS_FAIL_FAST_MODE (ctx) && ctx->has_this_store)
2876 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid ldftn with virtual function in method with stdarg 0 at 0x%04x", ctx->ip_offset));
2878 /*current method must not be static*/
2879 if (ctx->method->flags & METHOD_ATTRIBUTE_STATIC)
2880 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid ldftn with virtual function at 0x%04x", ctx->ip_offset));
2882 /*value is the this pointer, loaded using ldarg.0 */
2883 if (!stack_slot_is_this_pointer (value))
2884 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));
2886 ctx->code [ctx->ip_offset].flags |= IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL;
2891 * verify_delegate_compatibility:
2893 * Verify delegate creation sequence.
2897 verify_delegate_compatibility (VerifyContext *ctx, MonoClass *delegate, ILStackDesc *value, ILStackDesc *funptr)
2899 #define IS_VALID_OPCODE(offset, opcode) (ip [ip_offset - offset] == opcode && (ctx->code [ip_offset - offset].flags & IL_CODE_FLAG_SEEN))
2900 #define IS_LOAD_FUN_PTR(kind) (IS_VALID_OPCODE (6, CEE_PREFIX1) && ip [ip_offset - 5] == kind)
2902 MonoMethod *invoke, *method;
2903 const guint8 *ip = ctx->header->code;
2904 guint32 ip_offset = ctx->ip_offset;
2905 gboolean is_static_ldftn = FALSE, is_first_arg_bound = FALSE;
2907 if (stack_slot_get_type (funptr) != TYPE_PTR || !funptr->method) {
2908 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid function pointer parameter for delegate constructor at 0x%04x", ctx->ip_offset));
2912 invoke = mono_get_delegate_invoke (delegate);
2913 method = funptr->method;
2915 if (!method || !mono_method_signature (method)) {
2916 char *name = mono_type_get_full_name (delegate);
2917 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid method on stack to create delegate %s construction at 0x%04x", name, ctx->ip_offset));
2922 if (!invoke || !mono_method_signature (invoke)) {
2923 char *name = mono_type_get_full_name (delegate);
2924 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Delegate type %s with bad Invoke method at 0x%04x", name, ctx->ip_offset));
2929 is_static_ldftn = (ip_offset > 5 && IS_LOAD_FUN_PTR (CEE_LDFTN)) && method->flags & METHOD_ATTRIBUTE_STATIC;
2931 if (is_static_ldftn)
2932 is_first_arg_bound = mono_method_signature (invoke)->param_count + 1 == mono_method_signature (method)->param_count;
2934 if (!mono_delegate_signature_equal (mono_method_signature (invoke), mono_method_signature (method), is_first_arg_bound)) {
2935 char *fun_sig = mono_signature_get_desc (mono_method_signature (method), FALSE);
2936 char *invoke_sig = mono_signature_get_desc (mono_method_signature (invoke), FALSE);
2937 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));
2939 g_free (invoke_sig);
2943 * Delegate code sequences:
2949 * [-6] ldvirtftn token
2953 if (ip_offset > 5 && IS_LOAD_FUN_PTR (CEE_LDFTN)) {
2954 verify_ldftn_delegate (ctx, delegate, value, funptr);
2955 } else if (ip_offset > 6 && IS_VALID_OPCODE (7, CEE_DUP) && IS_LOAD_FUN_PTR (CEE_LDVIRTFTN)) {
2956 ctx->code [ip_offset - 6].flags |= IL_CODE_DELEGATE_SEQUENCE;
2958 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid code sequence for delegate creation at 0x%04x", ctx->ip_offset));
2960 ctx->code [ip_offset].flags |= IL_CODE_DELEGATE_SEQUENCE;
2963 if (is_first_arg_bound) {
2964 if (mono_method_signature (method)->param_count == 0 || !verify_stack_type_compatibility_full (ctx, mono_method_signature (method)->params [0], value, FALSE, TRUE))
2965 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("This object not compatible with function pointer for delegate creation at 0x%04x", ctx->ip_offset));
2967 if (method->flags & METHOD_ATTRIBUTE_STATIC) {
2968 if (!stack_slot_is_null_literal (value) && !is_first_arg_bound)
2969 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Non-null this args used with static function for delegate creation at 0x%04x", ctx->ip_offset));
2971 if (!verify_stack_type_compatibility_full (ctx, &method->klass->byval_arg, value, FALSE, TRUE) && !stack_slot_is_null_literal (value))
2972 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("This object not compatible with function pointer for delegate creation at 0x%04x", ctx->ip_offset));
2976 if (stack_slot_get_type (value) != TYPE_COMPLEX)
2977 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid first parameter for delegate creation at 0x%04x", ctx->ip_offset));
2979 #undef IS_VALID_OPCODE
2980 #undef IS_LOAD_FUN_PTR
2983 /* implement the opcode checks*/
2985 push_arg (VerifyContext *ctx, unsigned int arg, int take_addr)
2989 if (arg >= ctx->max_args) {
2991 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have argument %d", arg + 1));
2993 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method doesn't have argument %d", arg + 1));
2994 if (check_overflow (ctx)) //FIXME: what sane value could we ever push?
2995 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
2997 } else if (check_overflow (ctx)) {
2998 /*We must let the value be pushed, otherwise we would get an underflow error*/
2999 check_unverifiable_type (ctx, ctx->params [arg]);
3000 if (ctx->params [arg]->byref && take_addr)
3001 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ByRef of ByRef at 0x%04x", ctx->ip_offset));
3002 top = stack_push (ctx);
3003 if (!set_stack_value (ctx, top, ctx->params [arg], take_addr))
3006 if (arg == 0 && !(ctx->method->flags & METHOD_ATTRIBUTE_STATIC)) {
3008 ctx->has_this_store = TRUE;
3010 top->stype |= THIS_POINTER_MASK;
3011 if (mono_method_is_constructor (ctx->method) && !ctx->super_ctor_called && !ctx->method->klass->valuetype)
3012 top->stype |= UNINIT_THIS_MASK;
3018 push_local (VerifyContext *ctx, guint32 arg, int take_addr)
3020 if (arg >= ctx->num_locals) {
3021 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have local %d", arg + 1));
3022 } else if (check_overflow (ctx)) {
3023 /*We must let the value be pushed, otherwise we would get an underflow error*/
3024 check_unverifiable_type (ctx, ctx->locals [arg]);
3025 if (ctx->locals [arg]->byref && take_addr)
3026 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ByRef of ByRef at 0x%04x", ctx->ip_offset));
3028 set_stack_value (ctx, stack_push (ctx), ctx->locals [arg], take_addr);
3033 store_arg (VerifyContext *ctx, guint32 arg)
3037 if (arg >= ctx->max_args) {
3038 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method doesn't have argument %d at 0x%04x", arg + 1, ctx->ip_offset));
3039 if (check_underflow (ctx, 1))
3044 if (check_underflow (ctx, 1)) {
3045 value = stack_pop (ctx);
3046 if (!verify_stack_type_compatibility (ctx, ctx->params [arg], value)) {
3047 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type %s in argument store at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3050 if (arg == 0 && !(ctx->method->flags & METHOD_ATTRIBUTE_STATIC))
3051 ctx->has_this_store = 1;
3055 store_local (VerifyContext *ctx, guint32 arg)
3058 if (arg >= ctx->num_locals) {
3059 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method doesn't have local var %d at 0x%04x", arg + 1, ctx->ip_offset));
3063 /*TODO verify definite assigment */
3064 if (check_underflow (ctx, 1)) {
3065 value = stack_pop(ctx);
3066 if (!verify_stack_type_compatibility (ctx, ctx->locals [arg], value)) {
3067 char *expected = mono_type_full_name (ctx->locals [arg]);
3068 char *found = stack_slot_full_name (value);
3069 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type '%s' on stack cannot be stored to local %d with type '%s' at 0x%04x",
3080 /*FIXME add and sub needs special care here*/
3082 do_binop (VerifyContext *ctx, unsigned int opcode, const unsigned char table [TYPE_MAX][TYPE_MAX])
3084 ILStackDesc *a, *b, *top;
3085 int idxa, idxb, complexMerge = 0;
3088 if (!check_underflow (ctx, 2))
3090 b = stack_pop (ctx);
3091 a = stack_pop (ctx);
3093 idxa = stack_slot_get_underlying_type (a);
3094 if (stack_slot_is_managed_pointer (a)) {
3099 idxb = stack_slot_get_underlying_type (b);
3100 if (stack_slot_is_managed_pointer (b)) {
3107 res = table [idxa][idxb];
3109 VERIFIER_DEBUG ( printf ("binop res %d\n", res); );
3110 VERIFIER_DEBUG ( printf ("idxa %d idxb %d\n", idxa, idxb); );
3112 top = stack_push (ctx);
3113 if (res == TYPE_INV) {
3114 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)));
3115 copy_stack_value (top, a);
3119 if (res & NON_VERIFIABLE_RESULT) {
3120 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)));
3122 res = res & ~NON_VERIFIABLE_RESULT;
3125 if (complexMerge && res == TYPE_PTR) {
3126 if (complexMerge == 1)
3127 copy_stack_value (top, a);
3128 else if (complexMerge == 2)
3129 copy_stack_value (top, b);
3131 * There is no need to merge the type of two pointers.
3132 * The only valid operation is subtraction, that returns a native
3133 * int as result and can be used with any 2 pointer kinds.
3134 * This is valid acording to Patition III 1.1.4
3143 do_boolean_branch_op (VerifyContext *ctx, int delta)
3145 int target = ctx->ip_offset + delta;
3148 VERIFIER_DEBUG ( printf ("boolean branch offset %d delta %d target %d\n", ctx->ip_offset, delta, target); );
3150 if (target < 0 || target >= ctx->code_size) {
3151 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Boolean branch target out of code at 0x%04x", ctx->ip_offset));
3155 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
3157 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
3160 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
3164 ctx->target = target;
3166 if (!check_underflow (ctx, 1))
3169 top = stack_pop (ctx);
3170 if (!is_valid_bool_arg (top))
3171 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));
3173 check_unmanaged_pointer (ctx, top);
3177 stack_slot_is_complex_type_not_reference_type (ILStackDesc *slot)
3179 return stack_slot_get_type (slot) == TYPE_COMPLEX && !MONO_TYPE_IS_REFERENCE (slot->type) && !stack_slot_is_boxed_value (slot);
3183 do_branch_op (VerifyContext *ctx, signed int delta, const unsigned char table [TYPE_MAX][TYPE_MAX])
3188 int target = ctx->ip_offset + delta;
3190 VERIFIER_DEBUG ( printf ("branch offset %d delta %d target %d\n", ctx->ip_offset, delta, target); );
3192 if (target < 0 || target >= ctx->code_size) {
3193 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target out of code at 0x%04x", ctx->ip_offset));
3197 switch (is_valid_cmp_branch_instruction (ctx->header, ctx->ip_offset, target)) {
3198 case 1: /*FIXME use constants and not magic numbers.*/
3199 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
3202 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
3206 ctx->target = target;
3208 if (!check_underflow (ctx, 2))
3211 b = stack_pop (ctx);
3212 a = stack_pop (ctx);
3214 idxa = stack_slot_get_underlying_type (a);
3215 if (stack_slot_is_managed_pointer (a))
3218 idxb = stack_slot_get_underlying_type (b);
3219 if (stack_slot_is_managed_pointer (b))
3222 if (stack_slot_is_complex_type_not_reference_type (a) || stack_slot_is_complex_type_not_reference_type (b)) {
3227 res = table [idxa][idxb];
3230 VERIFIER_DEBUG ( printf ("branch res %d\n", res); );
3231 VERIFIER_DEBUG ( printf ("idxa %d idxb %d\n", idxa, idxb); );
3233 if (res == TYPE_INV) {
3234 CODE_NOT_VERIFIABLE (ctx,
3235 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));
3236 } else if (res & NON_VERIFIABLE_RESULT) {
3237 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));
3238 res = res & ~NON_VERIFIABLE_RESULT;
3243 do_cmp_op (VerifyContext *ctx, const unsigned char table [TYPE_MAX][TYPE_MAX], guint32 opcode)
3249 if (!check_underflow (ctx, 2))
3251 b = stack_pop (ctx);
3252 a = stack_pop (ctx);
3254 if (opcode == CEE_CGT_UN) {
3255 if (stack_slot_get_type (a) == TYPE_COMPLEX && stack_slot_get_type (b) == TYPE_COMPLEX) {
3256 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3261 idxa = stack_slot_get_underlying_type (a);
3262 if (stack_slot_is_managed_pointer (a))
3265 idxb = stack_slot_get_underlying_type (b);
3266 if (stack_slot_is_managed_pointer (b))
3269 if (stack_slot_is_complex_type_not_reference_type (a) || stack_slot_is_complex_type_not_reference_type (b)) {
3274 res = table [idxa][idxb];
3277 if(res == TYPE_INV) {
3278 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf("Compare instruction applyed to ill formed stack (%s x %s) at 0x%04x", stack_slot_get_name (a), stack_slot_get_name (b), ctx->ip_offset));
3279 } else if (res & NON_VERIFIABLE_RESULT) {
3280 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));
3281 res = res & ~NON_VERIFIABLE_RESULT;
3283 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3287 do_ret (VerifyContext *ctx)
3289 MonoType *ret = ctx->signature->ret;
3290 VERIFIER_DEBUG ( printf ("checking ret\n"); );
3291 if (ret->type != MONO_TYPE_VOID) {
3293 if (!check_underflow (ctx, 1))
3296 top = stack_pop(ctx);
3298 if (!verify_stack_type_compatibility (ctx, ctx->signature->ret, top)) {
3299 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible return value on stack with method signature ret at 0x%04x", ctx->ip_offset));
3303 if (ret->byref || ret->type == MONO_TYPE_TYPEDBYREF || mono_type_is_value_type (ret, "System", "ArgIterator") || mono_type_is_value_type (ret, "System", "RuntimeArgumentHandle"))
3304 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Method returns byref, TypedReference, ArgIterator or RuntimeArgumentHandle at 0x%04x", ctx->ip_offset));
3307 if (ctx->eval.size > 0) {
3308 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack not empty (%d) after ret at 0x%04x", ctx->eval.size, ctx->ip_offset));
3310 if (in_any_block (ctx->header, ctx->ip_offset))
3311 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("ret cannot escape exception blocks at 0x%04x", ctx->ip_offset));
3315 * 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.
3316 * This is illegal but mono_get_method_full decoded it.
3317 * TODO handle calling .ctor outside one or calling the .ctor for other class but super
3320 do_invoke_method (VerifyContext *ctx, int method_token, gboolean virtual)
3323 MonoMethodSignature *sig;
3326 gboolean virt_check_this = FALSE;
3327 gboolean constrained = ctx->prefix_set & PREFIX_CONSTRAINED;
3329 if (!(method = verifier_load_method (ctx, method_token, virtual ? "callvirt" : "call")))
3333 CLEAR_PREFIX (ctx, PREFIX_CONSTRAINED);
3335 if (method->klass->valuetype) // && !constrained ???
3336 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use callvirtual with valuetype method at 0x%04x", ctx->ip_offset));
3338 if ((method->flags & METHOD_ATTRIBUTE_STATIC))
3339 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use callvirtual with static method at 0x%04x", ctx->ip_offset));
3342 if (method->flags & METHOD_ATTRIBUTE_ABSTRACT)
3343 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use call with an abstract method at 0x%04x", ctx->ip_offset));
3345 if ((method->flags & METHOD_ATTRIBUTE_VIRTUAL) && !(method->flags & METHOD_ATTRIBUTE_FINAL)) {
3346 virt_check_this = TRUE;
3347 ctx->code [ctx->ip_offset].flags |= IL_CODE_CALL_NONFINAL_VIRTUAL;
3351 if (!(sig = mono_method_get_signature_full (method, ctx->image, method_token, ctx->generic_context)))
3352 sig = mono_method_get_signature (method, ctx->image, method_token);
3355 char *name = mono_type_get_full_name (method->klass);
3356 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Could not resolve signature of %s:%s at 0x%04x", name, method->name, ctx->ip_offset));
3361 param_count = sig->param_count + sig->hasthis;
3362 if (!check_underflow (ctx, param_count))
3365 for (i = sig->param_count - 1; i >= 0; --i) {
3366 VERIFIER_DEBUG ( printf ("verifying argument %d\n", i); );
3367 value = stack_pop (ctx);
3368 if (!verify_stack_type_compatibility (ctx, sig->params[i], value)) {
3369 char *stack_name = stack_slot_full_name (value);
3370 char *sig_name = mono_type_full_name (sig->params [i]);
3371 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));
3372 g_free (stack_name);
3376 if (stack_slot_is_managed_mutability_pointer (value))
3377 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));
3379 if ((ctx->prefix_set & PREFIX_TAIL) && stack_slot_is_managed_pointer (value)) {
3380 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));
3386 MonoType *type = &method->klass->byval_arg;
3389 if (mono_method_is_constructor (method) && !method->klass->valuetype) {
3390 if (!mono_method_is_constructor (ctx->method))
3391 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot call a constructor outside one at 0x%04x", ctx->ip_offset));
3392 if (method->klass != ctx->method->klass->parent && method->klass != ctx->method->klass)
3393 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot call a constructor to a type diferent that this or super at 0x%04x", ctx->ip_offset));
3395 ctx->super_ctor_called = TRUE;
3396 value = stack_pop_safe (ctx);
3397 if ((value->stype & THIS_POINTER_MASK) != THIS_POINTER_MASK)
3398 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid 'this ptr' argument for constructor at 0x%04x", ctx->ip_offset));
3400 value = stack_pop (ctx);
3403 copy_stack_value (©, value);
3404 //TODO we should extract this to a 'drop_byref_argument' and use everywhere
3405 //Other parts of the code suffer from the same issue of
3406 copy.type = mono_type_get_type_byval (copy.type);
3407 copy.stype &= ~POINTER_MASK;
3409 if (virt_check_this && !stack_slot_is_this_pointer (value) && !(method->klass->valuetype || stack_slot_is_boxed_value (value)))
3410 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use the call opcode with a non-final virtual method on an object diferent thant the this pointer at 0x%04x", ctx->ip_offset));
3412 if (constrained && virtual) {
3413 if (!stack_slot_is_managed_pointer (value))
3414 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Object is not a managed pointer for a constrained call at 0x%04x", ctx->ip_offset));
3415 if (!mono_metadata_type_equal_full (mono_type_get_type_byval (value->type), ctx->constrained_type, TRUE))
3416 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Object not compatible with constrained type at 0x%04x", ctx->ip_offset));
3417 copy.stype |= BOXED_MASK;
3419 if (stack_slot_is_managed_pointer (value) && !mono_class_from_mono_type (value->type)->valuetype)
3420 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));
3422 if (!virtual && mono_class_from_mono_type (value->type)->valuetype && !method->klass->valuetype && !stack_slot_is_boxed_value (value))
3423 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot call a valuetype baseclass at 0x%04x", ctx->ip_offset));
3425 if (virtual && mono_class_from_mono_type (value->type)->valuetype && !stack_slot_is_boxed_value (value))
3426 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a valuetype with callvirt at 0x%04x", ctx->ip_offset));
3428 if (method->klass->valuetype && (stack_slot_is_boxed_value (value) || !stack_slot_is_managed_pointer (value)))
3429 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));
3431 if (!verify_stack_type_compatibility (ctx, type, ©))
3432 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible this argument on stack with method signature at 0x%04x", ctx->ip_offset));
3434 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, mono_class_from_mono_type (value->type))) {
3435 char *name = mono_method_full_name (method, TRUE);
3436 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Method %s is not accessible at 0x%04x", name, ctx->ip_offset), MONO_EXCEPTION_METHOD_ACCESS);
3440 } else if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_method_full (ctx->method, method, NULL)) {
3441 char *name = mono_method_full_name (method, TRUE);
3442 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Method %s is not accessible at 0x%04x", name, ctx->ip_offset), MONO_EXCEPTION_METHOD_ACCESS);
3446 if (sig->ret->type != MONO_TYPE_VOID) {
3447 if (check_overflow (ctx)) {
3448 value = stack_push (ctx);
3449 set_stack_value (ctx, value, sig->ret, FALSE);
3450 if ((ctx->prefix_set & PREFIX_READONLY) && method->klass->rank && !strcmp (method->name, "Address")) {
3451 ctx->prefix_set &= ~PREFIX_READONLY;
3452 value->stype |= CMMP_MASK;
3457 if ((ctx->prefix_set & PREFIX_TAIL)) {
3458 if (!mono_delegate_ret_equal (mono_method_signature (ctx->method)->ret, sig->ret))
3459 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Tail call with incompatible return type at 0x%04x", ctx->ip_offset));
3460 if (ctx->header->code [ctx->ip_offset + 5] != CEE_RET)
3461 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Tail call not followed by ret at 0x%04x", ctx->ip_offset));
3467 do_push_static_field (VerifyContext *ctx, int token, gboolean take_addr)
3469 MonoClassField *field;
3471 if (!check_overflow (ctx))
3474 CLEAR_PREFIX (ctx, PREFIX_VOLATILE);
3476 if (!(field = verifier_load_field (ctx, token, &klass, take_addr ? "ldsflda" : "ldsfld")))
3479 if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC)) {
3480 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot load non static field at 0x%04x", ctx->ip_offset));
3483 /*taking the address of initonly field only works from the static constructor */
3484 if (take_addr && (field->type->attrs & FIELD_ATTRIBUTE_INIT_ONLY) &&
3485 !(field->parent == ctx->method->klass && (ctx->method->flags & (METHOD_ATTRIBUTE_SPECIAL_NAME | METHOD_ATTRIBUTE_STATIC)) && !strcmp (".cctor", ctx->method->name)))
3486 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a init-only field at 0x%04x", ctx->ip_offset));
3488 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3489 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3491 set_stack_value (ctx, stack_push (ctx), field->type, take_addr);
3495 do_store_static_field (VerifyContext *ctx, int token) {
3496 MonoClassField *field;
3499 CLEAR_PREFIX (ctx, PREFIX_VOLATILE);
3501 if (!check_underflow (ctx, 1))
3504 value = stack_pop (ctx);
3506 if (!(field = verifier_load_field (ctx, token, &klass, "stsfld")))
3509 if (!(field->type->attrs & FIELD_ATTRIBUTE_STATIC)) {
3510 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Cannot store non static field at 0x%04x", ctx->ip_offset));
3514 if (field->type->type == MONO_TYPE_TYPEDBYREF) {
3515 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Typedbyref field is an unverfiable type in store static field at 0x%04x", ctx->ip_offset));
3519 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3520 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3522 if (!verify_stack_type_compatibility (ctx, field->type, value))
3523 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type %s in static field store at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3527 check_is_valid_type_for_field_ops (VerifyContext *ctx, int token, ILStackDesc *obj, MonoClassField **ret_field, const char *opcode)
3529 MonoClassField *field;
3531 gboolean is_pointer;
3533 /*must be a reference type, a managed pointer, an unamanaged pointer, or a valuetype*/
3534 if (!(field = verifier_load_field (ctx, token, &klass, opcode)))
3538 //the value on stack is going to be used as a pointer
3539 is_pointer = stack_slot_get_type (obj) == TYPE_PTR || (stack_slot_get_type (obj) == TYPE_NATIVE_INT && !get_stack_type (&field->parent->byval_arg));
3541 if (field->type->type == MONO_TYPE_TYPEDBYREF) {
3542 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Typedbyref field is an unverfiable type at 0x%04x", ctx->ip_offset));
3545 g_assert (obj->type);
3547 /*The value on the stack must be a subclass of the defining type of the field*/
3548 /* we need to check if we can load the field from the stack value*/
3550 if (stack_slot_get_underlying_type (obj) == TYPE_NATIVE_INT)
3551 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Native int is not a verifiable type to reference a field at 0x%04x", ctx->ip_offset));
3553 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, NULL))
3554 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3556 if (!field->parent->valuetype && stack_slot_is_managed_pointer (obj))
3557 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));
3559 /*a value type can be loaded from a value or a managed pointer, but not a boxed object*/
3560 if (field->parent->valuetype && stack_slot_is_boxed_value (obj))
3561 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));
3563 if (!stack_slot_is_null_literal (obj) && !verify_stack_type_compatibility_full (ctx, &field->parent->byval_arg, obj, TRUE, FALSE))
3564 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type at stack is not compatible to reference the field at 0x%04x", ctx->ip_offset));
3566 if (!IS_SKIP_VISIBILITY (ctx) && !mono_method_can_access_field_full (ctx->method, field, mono_class_from_mono_type (obj->type)))
3567 CODE_NOT_VERIFIABLE2 (ctx, g_strdup_printf ("Type at stack is not accessible at 0x%04x", ctx->ip_offset), MONO_EXCEPTION_FIELD_ACCESS);
3570 check_unmanaged_pointer (ctx, obj);
3575 do_push_field (VerifyContext *ctx, int token, gboolean take_addr)
3578 MonoClassField *field;
3581 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3583 if (!check_underflow (ctx, 1))
3585 obj = stack_pop_safe (ctx);
3587 if (!check_is_valid_type_for_field_ops (ctx, token, obj, &field, take_addr ? "ldflda" : "ldfld"))
3590 if (take_addr && field->parent->valuetype && !stack_slot_is_managed_pointer (obj))
3591 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a temporary value-type at 0x%04x", ctx->ip_offset));
3593 if (take_addr && (field->type->attrs & FIELD_ATTRIBUTE_INIT_ONLY) &&
3594 !(field->parent == ctx->method->klass && mono_method_is_constructor (ctx->method)))
3595 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot take the address of a init-only field at 0x%04x", ctx->ip_offset));
3597 set_stack_value (ctx, stack_push (ctx), field->type, take_addr);
3601 do_store_field (VerifyContext *ctx, int token)
3603 ILStackDesc *value, *obj;
3604 MonoClassField *field;
3605 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3607 if (!check_underflow (ctx, 2))
3610 value = stack_pop (ctx);
3611 obj = stack_pop_safe (ctx);
3613 if (!check_is_valid_type_for_field_ops (ctx, token, obj, &field, "stfld"))
3616 if (!verify_stack_type_compatibility (ctx, field->type, value))
3617 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Incompatible type %s in field store at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3620 /*TODO proper handle for Nullable<T>*/
3622 do_box_value (VerifyContext *ctx, int klass_token)
3625 MonoType *type = get_boxable_mono_type (ctx, klass_token, "box");
3631 if (!check_underflow (ctx, 1))
3634 value = stack_pop (ctx);
3635 /*box is a nop for reference types*/
3637 if (stack_slot_get_underlying_type (value) == TYPE_COMPLEX && MONO_TYPE_IS_REFERENCE (value->type) && MONO_TYPE_IS_REFERENCE (type)) {
3638 stack_push_stack_val (ctx, value)->stype |= BOXED_MASK;
3643 if (!verify_stack_type_compatibility (ctx, type, value))
3644 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for boxing operation at 0x%04x", ctx->ip_offset));
3646 klass = mono_class_from_mono_type (type);
3647 if (mono_class_is_nullable (klass))
3648 type = &mono_class_get_nullable_param (klass)->byval_arg;
3649 stack_push_val (ctx, TYPE_COMPLEX | BOXED_MASK, type);
3653 do_unbox_value (VerifyContext *ctx, int klass_token)
3656 MonoType *type = get_boxable_mono_type (ctx, klass_token, "unbox");
3661 if (!check_underflow (ctx, 1))
3664 if (!mono_class_from_mono_type (type)->valuetype)
3665 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid reference type for unbox at 0x%04x", ctx->ip_offset));
3667 value = stack_pop (ctx);
3669 /*Value should be: a boxed valuetype or a reference type*/
3670 if (!(stack_slot_get_type (value) == TYPE_COMPLEX &&
3671 (stack_slot_is_boxed_value (value) || !mono_class_from_mono_type (value->type)->valuetype)))
3672 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));
3674 set_stack_value (ctx, value = stack_push (ctx), mono_type_get_type_byref (type), FALSE);
3675 value->stype |= CMMP_MASK;
3679 do_unbox_any (VerifyContext *ctx, int klass_token)
3682 MonoType *type = get_boxable_mono_type (ctx, klass_token, "unbox.any");
3687 if (!check_underflow (ctx, 1))
3690 value = stack_pop (ctx);
3692 /*Value should be: a boxed valuetype or a reference type*/
3693 if (!(stack_slot_get_type (value) == TYPE_COMPLEX &&
3694 (stack_slot_is_boxed_value (value) || !mono_class_from_mono_type (value->type)->valuetype)))
3695 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));
3697 set_stack_value (ctx, stack_push (ctx), type, FALSE);
3701 do_unary_math_op (VerifyContext *ctx, int op)
3704 if (!check_underflow (ctx, 1))
3706 value = stack_pop (ctx);
3707 switch (stack_slot_get_type (value)) {
3710 case TYPE_NATIVE_INT:
3715 case TYPE_COMPLEX: /*only enums are ok*/
3716 if (mono_type_is_enum_type (value->type))
3719 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for unary not at 0x%04x", ctx->ip_offset));
3721 stack_push_stack_val (ctx, value);
3725 do_conversion (VerifyContext *ctx, int kind)
3728 if (!check_underflow (ctx, 1))
3730 value = stack_pop (ctx);
3732 switch (stack_slot_get_type (value)) {
3735 case TYPE_NATIVE_INT:
3739 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));
3744 stack_push_val (ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
3747 stack_push_val (ctx,TYPE_I8, &mono_defaults.int64_class->byval_arg);
3750 stack_push_val (ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
3752 case TYPE_NATIVE_INT:
3753 stack_push_val (ctx, TYPE_NATIVE_INT, &mono_defaults.int_class->byval_arg);
3756 g_error ("unknown type %02x in conversion", kind);
3762 do_load_token (VerifyContext *ctx, int token)
3765 MonoClass *handle_class;
3766 if (!check_overflow (ctx))
3768 handle = mono_ldtoken (ctx->image, token, &handle_class, ctx->generic_context);
3770 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid token 0x%x for ldtoken at 0x%04x", token, ctx->ip_offset));
3773 if (handle_class == mono_defaults.typehandle_class) {
3774 mono_type_is_valid_in_context (ctx, (MonoType*)handle);
3775 } else if (handle_class == mono_defaults.methodhandle_class) {
3776 mono_method_is_valid_in_context (ctx, (MonoMethod*)handle);
3777 } else if (handle_class == mono_defaults.fieldhandle_class) {
3778 mono_type_is_valid_in_context (ctx, &((MonoClassField*)handle)->parent->byval_arg);
3780 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid ldtoken type %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
3782 stack_push_val (ctx, TYPE_COMPLEX, mono_class_get_type (handle_class));
3786 do_ldobj_value (VerifyContext *ctx, int token)
3789 MonoType *type = get_boxable_mono_type (ctx, token, "ldobj");
3790 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3795 if (!check_underflow (ctx, 1))
3798 value = stack_pop (ctx);
3799 if (!stack_slot_is_managed_pointer (value)
3800 && stack_slot_get_type (value) != TYPE_NATIVE_INT
3801 && !(stack_slot_get_type (value) == TYPE_PTR && value->type->type != MONO_TYPE_FNPTR)) {
3802 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid argument %s to ldobj at 0x%04x", stack_slot_get_name (value), ctx->ip_offset));
3806 if (stack_slot_get_type (value) == TYPE_NATIVE_INT)
3807 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Using native pointer to ldobj at 0x%04x", ctx->ip_offset));
3809 /*We have a byval on the stack, but the comparison must be strict. */
3810 if (!verify_type_compatibility_full (ctx, type, mono_type_get_type_byval (value->type), TRUE))
3811 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldojb operation at 0x%04x", ctx->ip_offset));
3813 set_stack_value (ctx, stack_push (ctx), type, FALSE);
3817 do_stobj (VerifyContext *ctx, int token)
3819 ILStackDesc *dest, *src;
3820 MonoType *type = get_boxable_mono_type (ctx, token, "stobj");
3821 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
3826 if (!check_underflow (ctx, 2))
3829 src = stack_pop (ctx);
3830 dest = stack_pop (ctx);
3832 if (stack_slot_is_managed_mutability_pointer (dest))
3833 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with stobj at 0x%04x", ctx->ip_offset));
3835 if (!stack_slot_is_managed_pointer (dest))
3836 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid destination of stobj operation at 0x%04x", ctx->ip_offset));
3838 if (stack_slot_is_boxed_value (src) && !MONO_TYPE_IS_REFERENCE (src->type) && !MONO_TYPE_IS_REFERENCE (type))
3839 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));
3841 if (!verify_stack_type_compatibility (ctx, type, src))
3842 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Token and source types of stobj don't match at 0x%04x", ctx->ip_offset));
3844 if (!verify_type_compatibility (ctx, mono_type_get_type_byval (dest->type), type))
3845 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Destination and token types of stobj don't match at 0x%04x", ctx->ip_offset));
3849 do_cpobj (VerifyContext *ctx, int token)
3851 ILStackDesc *dest, *src;
3852 MonoType *type = get_boxable_mono_type (ctx, token, "cpobj");
3856 if (!check_underflow (ctx, 2))
3859 src = stack_pop (ctx);
3860 dest = stack_pop (ctx);
3862 if (!stack_slot_is_managed_pointer (src))
3863 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid source of cpobj operation at 0x%04x", ctx->ip_offset));
3865 if (!stack_slot_is_managed_pointer (dest))
3866 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid destination of cpobj operation at 0x%04x", ctx->ip_offset));
3868 if (stack_slot_is_managed_mutability_pointer (dest))
3869 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with cpobj at 0x%04x", ctx->ip_offset));
3871 if (!verify_type_compatibility (ctx, type, mono_type_get_type_byval (src->type)))
3872 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Token and source types of cpobj don't match at 0x%04x", ctx->ip_offset));
3874 if (!verify_type_compatibility (ctx, mono_type_get_type_byval (dest->type), type))
3875 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Destination and token types of cpobj don't match at 0x%04x", ctx->ip_offset));
3879 do_initobj (VerifyContext *ctx, int token)
3882 MonoType *stack, *type = get_boxable_mono_type (ctx, token, "initobj");
3886 if (!check_underflow (ctx, 1))
3889 obj = stack_pop (ctx);
3891 if (!stack_slot_is_managed_pointer (obj))
3892 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid object address for initobj at 0x%04x", ctx->ip_offset));
3894 if (stack_slot_is_managed_mutability_pointer (obj))
3895 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with initobj at 0x%04x", ctx->ip_offset));
3897 stack = mono_type_get_type_byval (obj->type);
3898 if (MONO_TYPE_IS_REFERENCE (stack)) {
3899 if (!verify_type_compatibility (ctx, stack, type))
3900 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type token of initobj not compatible with value on stack at 0x%04x", ctx->ip_offset));
3901 else if (IS_STRICT_MODE (ctx) && !mono_metadata_type_equal (type, stack))
3902 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type token of initobj not compatible with value on stack at 0x%04x", ctx->ip_offset));
3903 } else if (!verify_type_compatibility (ctx, stack, type)) {
3904 char *expected_name = mono_type_full_name (type);
3905 char *stack_name = mono_type_full_name (stack);
3907 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));
3908 g_free (expected_name);
3909 g_free (stack_name);
3914 do_newobj (VerifyContext *ctx, int token)
3918 MonoMethodSignature *sig;
3920 gboolean is_delegate = FALSE;
3922 if (!(method = verifier_load_method (ctx, token, "newobj")))
3925 if (!mono_method_is_constructor (method)) {
3926 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Method from token 0x%08x not a constructor at 0x%04x", token, ctx->ip_offset));
3930 if (method->klass->flags & (TYPE_ATTRIBUTE_ABSTRACT | TYPE_ATTRIBUTE_INTERFACE))
3931 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Trying to instantiate an abstract or interface type at 0x%04x", ctx->ip_offset));
3933 if (!mono_method_can_access_method_full (ctx->method, method, NULL)) {
3934 char *from = mono_method_full_name (ctx->method, TRUE);
3935 char *to = mono_method_full_name (method, TRUE);
3936 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);
3941 //FIXME use mono_method_get_signature_full
3942 sig = mono_method_signature (method);
3944 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid constructor signature to newobj at 0x%04x", ctx->ip_offset));
3948 if (!check_underflow (ctx, sig->param_count))
3951 is_delegate = method->klass->parent == mono_defaults.multicastdelegate_class;
3954 ILStackDesc *funptr;
3955 //first arg is object, second arg is fun ptr
3956 if (sig->param_count != 2) {
3957 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid delegate constructor at 0x%04x", ctx->ip_offset));
3960 funptr = stack_pop (ctx);
3961 value = stack_pop (ctx);
3962 verify_delegate_compatibility (ctx, method->klass, value, funptr);
3964 for (i = sig->param_count - 1; i >= 0; --i) {
3965 VERIFIER_DEBUG ( printf ("verifying constructor argument %d\n", i); );
3966 value = stack_pop (ctx);
3967 if (!verify_stack_type_compatibility (ctx, sig->params [i], value)) {
3968 char *stack_name = stack_slot_full_name (value);
3969 char *sig_name = mono_type_full_name (sig->params [i]);
3970 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));
3971 g_free (stack_name);
3975 if (stack_slot_is_managed_mutability_pointer (value))
3976 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer as argument of newobj at 0x%04x", ctx->ip_offset));
3980 if (check_overflow (ctx))
3981 set_stack_value (ctx, stack_push (ctx), &method->klass->byval_arg, FALSE);
3985 do_cast (VerifyContext *ctx, int token, const char *opcode) {
3991 if (!check_underflow (ctx, 1))
3994 if (!(type = verifier_load_type (ctx, token, opcode)))
3998 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid %s type at 0x%04x", opcode, ctx->ip_offset));
4002 value = stack_pop (ctx);
4003 is_boxed = stack_slot_is_boxed_value (value);
4005 if (stack_slot_is_managed_pointer (value))
4006 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value for %s at 0x%04x", opcode, ctx->ip_offset));
4007 else if (!MONO_TYPE_IS_REFERENCE (value->type) && !is_boxed) {
4008 char *name = stack_slot_full_name (value);
4009 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));
4013 switch (value->type->type) {
4014 case MONO_TYPE_FNPTR:
4016 case MONO_TYPE_TYPEDBYREF:
4017 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value for %s at 0x%04x", opcode, ctx->ip_offset));
4020 do_box = is_boxed || mono_type_is_generic_argument(type) || mono_class_from_mono_type (type)->valuetype;
4021 stack_push_val (ctx, TYPE_COMPLEX | (do_box ? BOXED_MASK : 0), type);
4025 mono_type_from_opcode (int opcode) {
4033 return &mono_defaults.sbyte_class->byval_arg;
4041 return &mono_defaults.int16_class->byval_arg;
4049 return &mono_defaults.int32_class->byval_arg;
4055 return &mono_defaults.int64_class->byval_arg;
4061 return &mono_defaults.single_class->byval_arg;
4067 return &mono_defaults.double_class->byval_arg;
4073 return &mono_defaults.int_class->byval_arg;
4077 case CEE_LDELEM_REF:
4078 case CEE_STELEM_REF:
4079 return &mono_defaults.object_class->byval_arg;
4082 g_error ("unknown opcode %02x in mono_type_from_opcode ", opcode);
4088 do_load_indirect (VerifyContext *ctx, int opcode)
4091 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
4093 if (!check_underflow (ctx, 1))
4096 value = stack_pop (ctx);
4097 if (!stack_slot_is_managed_pointer (value)) {
4098 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Load indirect not using a manager pointer at 0x%04x", ctx->ip_offset));
4099 set_stack_value (ctx, stack_push (ctx), mono_type_from_opcode (opcode), FALSE);
4103 if (opcode == CEE_LDIND_REF) {
4104 if (stack_slot_get_underlying_type (value) != TYPE_COMPLEX || mono_class_from_mono_type (value->type)->valuetype)
4105 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldind_ref expected object byref operation at 0x%04x", ctx->ip_offset));
4106 set_stack_value (ctx, stack_push (ctx), mono_type_get_type_byval (value->type), FALSE);
4108 if (!verify_type_compatibility_full (ctx, mono_type_from_opcode (opcode), mono_type_get_type_byval (value->type), TRUE))
4109 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type at stack for ldind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
4110 set_stack_value (ctx, stack_push (ctx), mono_type_from_opcode (opcode), FALSE);
4115 do_store_indirect (VerifyContext *ctx, int opcode)
4117 ILStackDesc *addr, *val;
4118 CLEAR_PREFIX (ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
4120 if (!check_underflow (ctx, 2))
4123 val = stack_pop (ctx);
4124 addr = stack_pop (ctx);
4126 check_unmanaged_pointer (ctx, addr);
4128 if (!stack_slot_is_managed_pointer (addr) && stack_slot_get_type (addr) != TYPE_PTR) {
4129 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid non-pointer argument to stind at 0x%04x", ctx->ip_offset));
4133 if (stack_slot_is_managed_mutability_pointer (addr)) {
4134 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with stind at 0x%04x", ctx->ip_offset));
4138 if (!verify_type_compatibility_full (ctx, mono_type_from_opcode (opcode), mono_type_get_type_byval (addr->type), TRUE))
4139 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid addr type at stack for stind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
4141 if (!verify_stack_type_compatibility (ctx, mono_type_from_opcode (opcode), val))
4142 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value type at stack for stind 0x%x operation at 0x%04x", opcode, ctx->ip_offset));
4146 do_newarr (VerifyContext *ctx, int token)
4149 MonoType *type = get_boxable_mono_type (ctx, token, "newarr");
4154 if (!check_underflow (ctx, 1))
4157 value = stack_pop (ctx);
4158 if (stack_slot_get_type (value) != TYPE_I4 && stack_slot_get_type (value) != TYPE_NATIVE_INT)
4159 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));
4161 set_stack_value (ctx, stack_push (ctx), mono_class_get_type (mono_array_class_get (mono_class_from_mono_type (type), 1)), FALSE);
4164 /*FIXME handle arrays that are not 0-indexed*/
4166 do_ldlen (VerifyContext *ctx)
4170 if (!check_underflow (ctx, 1))
4173 value = stack_pop (ctx);
4175 if (stack_slot_get_type (value) != TYPE_COMPLEX || value->type->type != MONO_TYPE_SZARRAY)
4176 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type for ldlen at 0x%04x", ctx->ip_offset));
4178 stack_push_val (ctx, TYPE_NATIVE_INT, &mono_defaults.int_class->byval_arg);
4181 /*FIXME handle arrays that are not 0-indexed*/
4182 /*FIXME handle readonly prefix and CMMP*/
4184 do_ldelema (VerifyContext *ctx, int klass_token)
4186 ILStackDesc *index, *array, *res;
4187 MonoType *type = get_boxable_mono_type (ctx, klass_token, "ldelema");
4193 if (!check_underflow (ctx, 2))
4196 index = stack_pop (ctx);
4197 array = stack_pop (ctx);
4199 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4200 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));
4202 if (!stack_slot_is_null_literal (array)) {
4203 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY)
4204 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type(%s) for ldelema at 0x%04x", stack_slot_get_name (array), ctx->ip_offset));
4206 if (get_stack_type (type) == TYPE_I4 || get_stack_type (type) == TYPE_NATIVE_INT) {
4207 valid = verify_type_compatibility_full (ctx, type, &array->type->data.klass->byval_arg, TRUE);
4209 valid = mono_metadata_type_equal (type, &array->type->data.klass->byval_arg);
4212 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelema at 0x%04x", ctx->ip_offset));
4216 res = stack_push (ctx);
4217 set_stack_value (ctx, res, type, TRUE);
4218 if (ctx->prefix_set & PREFIX_READONLY) {
4219 ctx->prefix_set &= ~PREFIX_READONLY;
4220 res->stype |= CMMP_MASK;
4225 * FIXME handle arrays that are not 0-indexed
4226 * FIXME handle readonly prefix and CMMP
4229 do_ldelem (VerifyContext *ctx, int opcode, int token)
4231 #define IS_ONE_OF2(T, A, B) (T == A || T == B)
4232 ILStackDesc *index, *array;
4234 if (!check_underflow (ctx, 2))
4237 if (opcode == CEE_LDELEM) {
4238 if (!(type = verifier_load_type (ctx, token, "ldelem.any"))) {
4239 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Type (0x%08x) not found at 0x%04x", token, ctx->ip_offset));
4243 type = mono_type_from_opcode (opcode);
4246 index = stack_pop (ctx);
4247 array = stack_pop (ctx);
4249 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4250 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));
4252 if (!stack_slot_is_null_literal (array)) {
4253 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY)
4254 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));
4256 if (opcode == CEE_LDELEM_REF) {
4257 if (array->type->data.klass->valuetype)
4258 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type is not a reference type for ldelem.ref 0x%04x", ctx->ip_offset));
4259 type = &array->type->data.klass->byval_arg;
4261 MonoType *candidate = &array->type->data.klass->byval_arg;
4262 if (IS_STRICT_MODE (ctx)) {
4263 MonoType *underlying_type = mono_type_get_underlying_type_any (type);
4264 MonoType *underlying_candidate = mono_type_get_underlying_type_any (candidate);
4265 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)) ||
4266 (IS_ONE_OF2 (underlying_candidate->type, MONO_TYPE_I4, MONO_TYPE_U4) && IS_ONE_OF2 (underlying_type->type, MONO_TYPE_I, MONO_TYPE_U)))
4267 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelem.X at 0x%04x", ctx->ip_offset));
4269 if (!verify_type_compatibility_full (ctx, type, candidate, TRUE))
4270 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for ldelem.X at 0x%04x", ctx->ip_offset));
4275 set_stack_value (ctx, stack_push (ctx), type, FALSE);
4280 * FIXME handle arrays that are not 0-indexed
4283 do_stelem (VerifyContext *ctx, int opcode, int token)
4285 ILStackDesc *index, *array, *value;
4287 if (!check_underflow (ctx, 3))
4290 if (opcode == CEE_STELEM) {
4291 if (!(type = verifier_load_type (ctx, token, "stelem.any"))) {
4292 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Type (0x%08x) not found at 0x%04x", token, ctx->ip_offset));
4296 type = mono_type_from_opcode (opcode);
4299 value = stack_pop (ctx);
4300 index = stack_pop (ctx);
4301 array = stack_pop (ctx);
4303 if (stack_slot_get_type (index) != TYPE_I4 && stack_slot_get_type (index) != TYPE_NATIVE_INT)
4304 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));
4306 if (!stack_slot_is_null_literal (array)) {
4307 if (stack_slot_get_type (array) != TYPE_COMPLEX || array->type->type != MONO_TYPE_SZARRAY) {
4308 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));
4310 if (opcode == CEE_STELEM_REF) {
4311 if (array->type->data.klass->valuetype)
4312 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type is not a reference type for stelem.ref 0x%04x", ctx->ip_offset));
4313 } else if (!verify_type_compatibility_full (ctx, &array->type->data.klass->byval_arg, type, TRUE)) {
4314 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid array type on stack for stdelem.X at 0x%04x", ctx->ip_offset));
4318 if (opcode == CEE_STELEM_REF) {
4319 if (!stack_slot_is_boxed_value (value) && mono_class_from_mono_type (value->type)->valuetype)
4320 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value is not a reference type for stelem.ref 0x%04x", ctx->ip_offset));
4321 } else if (opcode != CEE_STELEM_REF) {
4322 if (!verify_stack_type_compatibility (ctx, type, value))
4323 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid value on stack for stdelem.X at 0x%04x", ctx->ip_offset));
4325 if (stack_slot_is_boxed_value (value) && !MONO_TYPE_IS_REFERENCE (value->type) && !MONO_TYPE_IS_REFERENCE (type))
4326 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));
4332 do_throw (VerifyContext *ctx)
4334 ILStackDesc *exception;
4335 if (!check_underflow (ctx, 1))
4337 exception = stack_pop (ctx);
4339 if (!stack_slot_is_null_literal (exception) && !(stack_slot_get_type (exception) == TYPE_COMPLEX && !mono_class_from_mono_type (exception->type)->valuetype))
4340 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid type on stack for throw, expected reference type at 0x%04x", ctx->ip_offset));
4342 if (mono_type_is_generic_argument (exception->type) && !stack_slot_is_boxed_value (exception)) {
4343 char *name = mono_type_full_name (exception->type);
4344 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));
4347 /*The stack is left empty after a throw*/
4353 do_endfilter (VerifyContext *ctx)
4355 MonoExceptionClause *clause;
4357 if (IS_STRICT_MODE (ctx)) {
4358 if (ctx->eval.size != 1)
4359 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack size must have one item for endfilter at 0x%04x", ctx->ip_offset));
4361 if (ctx->eval.size >= 1 && stack_slot_get_type (stack_pop (ctx)) != TYPE_I4)
4362 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Stack item type is not an int32 for endfilter at 0x%04x", ctx->ip_offset));
4365 if ((clause = is_correct_endfilter (ctx, ctx->ip_offset))) {
4366 if (IS_STRICT_MODE (ctx)) {
4367 if (ctx->ip_offset != clause->handler_offset - 2)
4368 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter is not the last instruction of the filter clause at 0x%04x", ctx->ip_offset));
4370 if ((ctx->ip_offset != clause->handler_offset - 2) && !MONO_OFFSET_IN_HANDLER (clause, ctx->ip_offset))
4371 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter is not the last instruction of the filter clause at 0x%04x", ctx->ip_offset));
4374 if (IS_STRICT_MODE (ctx) && !is_unverifiable_endfilter (ctx, ctx->ip_offset))
4375 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("endfilter outside filter clause at 0x%04x", ctx->ip_offset));
4377 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("endfilter outside filter clause at 0x%04x", ctx->ip_offset));
4384 do_leave (VerifyContext *ctx, int delta)
4386 int target = ((gint32)ctx->ip_offset) + delta;
4387 if (target >= ctx->code_size || target < 0)
4388 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target out of code at 0x%04x", ctx->ip_offset));
4390 if (!is_correct_leave (ctx->header, ctx->ip_offset, target))
4391 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Leave not allowed in finally block at 0x%04x", ctx->ip_offset));
4398 * Verify br and br.s opcodes.
4401 do_static_branch (VerifyContext *ctx, int delta)
4403 int target = ctx->ip_offset + delta;
4404 if (target < 0 || target >= ctx->code_size) {
4405 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("branch target out of code at 0x%04x", ctx->ip_offset));
4409 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
4411 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
4414 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Branch target escapes out of exception block at 0x%04x", ctx->ip_offset));
4418 ctx->target = target;
4422 do_switch (VerifyContext *ctx, int count, const unsigned char *data)
4424 int i, base = ctx->ip_offset + 5 + count * 4;
4427 if (!check_underflow (ctx, 1))
4430 value = stack_pop (ctx);
4432 if (stack_slot_get_type (value) != TYPE_I4 && stack_slot_get_type (value) != TYPE_NATIVE_INT)
4433 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid argument to switch at 0x%04x", ctx->ip_offset));
4435 for (i = 0; i < count; ++i) {
4436 int target = base + read32 (data + i * 4);
4438 if (target < 0 || target >= ctx->code_size) {
4439 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Switch target %x out of code at 0x%04x", i, ctx->ip_offset));
4443 switch (is_valid_branch_instruction (ctx->header, ctx->ip_offset, target)) {
4445 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Switch target %x escapes out of exception block at 0x%04x", i, ctx->ip_offset));
4448 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Switch target %x escapes out of exception block at 0x%04x", i, ctx->ip_offset));
4451 merge_stacks (ctx, &ctx->eval, &ctx->code [target], FALSE, TRUE);
4456 do_load_function_ptr (VerifyContext *ctx, guint32 token, gboolean virtual)
4461 if (virtual && !check_underflow (ctx, 1))
4464 if (!virtual && !check_overflow (ctx))
4467 if (!IS_METHOD_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
4468 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid token %x for ldftn at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4472 if (!(method = verifier_load_method (ctx, token, virtual ? "ldvirtfrn" : "ldftn")))
4475 if (mono_method_is_constructor (method))
4476 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use ldftn with a constructor at 0x%04x", ctx->ip_offset));
4479 ILStackDesc *top = stack_pop (ctx);
4481 if (stack_slot_get_type (top) != TYPE_COMPLEX || top->type->type == MONO_TYPE_VALUETYPE)
4482 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Invalid argument to ldvirtftn at 0x%04x", ctx->ip_offset));
4484 if (method->flags & METHOD_ATTRIBUTE_STATIC)
4485 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use ldvirtftn with a constructor at 0x%04x", ctx->ip_offset));
4487 if (!verify_stack_type_compatibility (ctx, &method->klass->byval_arg, top))
4488 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Unexpected object for ldvirtftn at 0x%04x", ctx->ip_offset));
4491 if (!mono_method_can_access_method_full (ctx->method, method, NULL))
4492 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);
4494 top = stack_push_val(ctx, TYPE_PTR, mono_type_create_fnptr_from_mono_method (ctx, method));
4495 top->method = method;
4499 do_sizeof (VerifyContext *ctx, int token)
4503 if (!IS_TYPE_DEF_OR_REF_OR_SPEC (token) || !token_bounds_check (ctx->image, token)) {
4504 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid type token %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4508 if (!(type = verifier_load_type (ctx, token, "sizeof")))
4511 if (type->byref && type->type != MONO_TYPE_TYPEDBYREF) {
4512 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of byref type at 0x%04x", ctx->ip_offset));
4516 if (type->type == MONO_TYPE_VOID) {
4517 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Invalid use of void type at 0x%04x", ctx->ip_offset));
4521 if (check_overflow (ctx))
4522 set_stack_value (ctx, stack_push (ctx), &mono_defaults.uint32_class->byval_arg, FALSE);
4525 /* Stack top can be of any type, the runtime doesn't care and treat everything as an int. */
4527 do_localloc (VerifyContext *ctx)
4531 if (ctx->eval.size != 1) {
4532 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack must have only size item in localloc at 0x%04x", ctx->ip_offset));
4536 if (in_any_exception_block (ctx->header, ctx->ip_offset)) {
4537 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Stack must have only size item in localloc at 0x%04x", ctx->ip_offset));
4541 /*TODO verify top type*/
4542 top = stack_pop (ctx);
4544 set_stack_value (ctx, stack_push (ctx), &mono_defaults.int_class->byval_arg, FALSE);
4545 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Instruction localloc in never verifiable at 0x%04x", ctx->ip_offset));
4549 do_ldstr (VerifyContext *ctx, guint32 token)
4551 GSList *error = NULL;
4552 if (mono_metadata_token_code (token) != MONO_TOKEN_STRING) {
4553 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid string token %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4557 if (!ctx->image->dynamic && !mono_verifier_verify_string_signature (ctx->image, mono_metadata_token_index (token), &error)) {
4559 ctx->list = g_slist_concat (ctx->list, error);
4560 ADD_VERIFY_ERROR2 (ctx, g_strdup_printf ("Invalid string index %x at 0x%04x", token, ctx->ip_offset), MONO_EXCEPTION_BAD_IMAGE);
4564 if (check_overflow (ctx))
4565 stack_push_val (ctx, TYPE_COMPLEX, &mono_defaults.string_class->byval_arg);
4569 do_refanyval (VerifyContext *ctx, int token)
4573 if (!check_underflow (ctx, 1))
4576 if (!(type = get_boxable_mono_type (ctx, token, "refanyval")))
4579 top = stack_pop (ctx);
4581 if (top->stype != TYPE_PTR || top->type->type != MONO_TYPE_TYPEDBYREF)
4582 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));
4584 set_stack_value (ctx, stack_push (ctx), type, TRUE);
4588 do_refanytype (VerifyContext *ctx)
4592 if (!check_underflow (ctx, 1))
4595 top = stack_pop (ctx);
4597 if (top->stype != TYPE_PTR || top->type->type != MONO_TYPE_TYPEDBYREF)
4598 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));
4600 set_stack_value (ctx, stack_push (ctx), &mono_defaults.typehandle_class->byval_arg, FALSE);
4605 do_mkrefany (VerifyContext *ctx, int token)
4609 if (!check_underflow (ctx, 1))
4612 if (!(type = get_boxable_mono_type (ctx, token, "refanyval")))
4615 top = stack_pop (ctx);
4617 if (stack_slot_is_managed_mutability_pointer (top))
4618 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Cannot use a readonly pointer with mkrefany at 0x%04x", ctx->ip_offset));
4620 if (!stack_slot_is_managed_pointer (top)) {
4621 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));
4623 MonoType *stack_type = mono_type_get_type_byval (top->type);
4624 if (MONO_TYPE_IS_REFERENCE (type) && !mono_metadata_type_equal (type, stack_type))
4625 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type not compatible for mkrefany at 0x%04x", ctx->ip_offset));
4627 if (!MONO_TYPE_IS_REFERENCE (type) && !verify_type_compatibility_full (ctx, type, stack_type, TRUE))
4628 CODE_NOT_VERIFIABLE (ctx, g_strdup_printf ("Type not compatible for mkrefany at 0x%04x", ctx->ip_offset));
4631 set_stack_value (ctx, stack_push (ctx), &mono_defaults.typed_reference_class->byval_arg, FALSE);
4635 do_ckfinite (VerifyContext *ctx)
4638 if (!check_underflow (ctx, 1))
4641 top = stack_pop (ctx);
4643 if (stack_slot_get_underlying_type (top) != TYPE_R8)
4644 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));
4645 stack_push_stack_val (ctx, top);
4649 * Merge the stacks and perform compat checks. The merge check if types of @from are mergeable with type of @to
4651 * @from holds new values for a given control path
4652 * @to holds the current values of a given control path
4654 * TODO we can eliminate the from argument as all callers pass &ctx->eval
4657 merge_stacks (VerifyContext *ctx, ILCodeDesc *from, ILCodeDesc *to, gboolean start, gboolean external)
4661 stack_init (ctx, to);
4664 if (to->flags == IL_CODE_FLAG_NOT_PROCESSED)
4667 stack_copy (&ctx->eval, to);
4669 } else if (!(to->flags & IL_CODE_STACK_MERGED)) {
4670 stack_copy (to, &ctx->eval);
4673 VERIFIER_DEBUG ( printf ("performing stack merge %d x %d\n", from->size, to->size); );
4675 if (from->size != to->size) {
4676 VERIFIER_DEBUG ( printf ("different stack sizes %d x %d at 0x%04x\n", from->size, to->size, ctx->ip_offset); );
4677 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));
4681 //FIXME we need to preserve CMMP attributes
4682 //FIXME we must take null literals into consideration.
4683 for (i = 0; i < from->size; ++i) {
4684 ILStackDesc *new_slot = from->stack + i;
4685 ILStackDesc *old_slot = to->stack + i;
4686 MonoType *new_type = mono_type_from_stack_slot (new_slot);
4687 MonoType *old_type = mono_type_from_stack_slot (old_slot);
4688 MonoClass *old_class = mono_class_from_mono_type (old_type);
4689 MonoClass *new_class = mono_class_from_mono_type (new_type);
4690 MonoClass *match_class = NULL;
4692 // S := T then U = S (new value is compatible with current value, keep current)
4693 if (verify_stack_type_compatibility (ctx, old_type, new_slot)) {
4694 copy_stack_value (new_slot, old_slot);
4698 // T := S then U = T (old value is compatible with current value, use new)
4699 if (verify_stack_type_compatibility (ctx, new_type, old_slot)) {
4700 copy_stack_value (old_slot, new_slot);
4704 if (mono_type_is_generic_argument (old_type) || mono_type_is_generic_argument (new_type)) {
4705 char *old_name = stack_slot_full_name (old_slot);
4706 char *new_name = stack_slot_full_name (new_slot);
4707 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));
4713 //both are reference types, use closest common super type
4714 if (!mono_class_from_mono_type (old_type)->valuetype
4715 && !mono_class_from_mono_type (new_type)->valuetype
4716 && !stack_slot_is_managed_pointer (old_slot)
4717 && !stack_slot_is_managed_pointer (new_slot)) {
4719 for (j = MIN (old_class->idepth, new_class->idepth) - 1; j > 0; --j) {
4720 if (mono_metadata_type_equal (&old_class->supertypes [j]->byval_arg, &new_class->supertypes [j]->byval_arg)) {
4721 match_class = old_class->supertypes [j];
4726 mono_class_setup_interfaces (old_class, &error);
4727 if (!mono_error_ok (&error)) {
4728 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));
4729 mono_error_cleanup (&error);
4732 for (j = 0; j < old_class->interface_count; ++j) {
4733 for (k = 0; k < new_class->interface_count; ++k) {
4734 if (mono_metadata_type_equal (&old_class->interfaces [j]->byval_arg, &new_class->interfaces [k]->byval_arg)) {
4735 match_class = old_class->interfaces [j];
4741 //No decent super type found, use object
4742 match_class = mono_defaults.object_class;
4744 } 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)) {
4745 match_class = mono_defaults.object_class;
4750 char *old_name = stack_slot_full_name (old_slot);
4751 char *new_name = stack_slot_full_name (new_slot);
4752 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));
4756 set_stack_value (ctx, old_slot, &new_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4760 g_assert (match_class);
4761 set_stack_value (ctx, old_slot, &match_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4762 set_stack_value (ctx, new_slot, &match_class->byval_arg, stack_slot_is_managed_pointer (old_slot));
4768 to->flags |= IL_CODE_FLAG_WAS_TARGET;
4769 to->flags |= IL_CODE_STACK_MERGED;
4772 #define HANDLER_START(clause) ((clause)->flags == MONO_EXCEPTION_CLAUSE_FILTER ? (clause)->data.filter_offset : clause->handler_offset)
4773 #define IS_CATCH_OR_FILTER(clause) ((clause)->flags == MONO_EXCEPTION_CLAUSE_FILTER || (clause)->flags == MONO_EXCEPTION_CLAUSE_NONE)
4776 * is_clause_in_range :
4778 * Returns TRUE if either the protected block or the handler of @clause is in the @start - @end range.
4781 is_clause_in_range (MonoExceptionClause *clause, guint32 start, guint32 end)
4783 if (clause->try_offset >= start && clause->try_offset < end)
4785 if (HANDLER_START (clause) >= start && HANDLER_START (clause) < end)
4791 * is_clause_inside_range :
4793 * Returns TRUE if @clause lies completely inside the @start - @end range.
4796 is_clause_inside_range (MonoExceptionClause *clause, guint32 start, guint32 end)
4798 if (clause->try_offset < start || (clause->try_offset + clause->try_len) > end)
4800 if (HANDLER_START (clause) < start || (clause->handler_offset + clause->handler_len) > end)
4806 * is_clause_nested :
4808 * Returns TRUE if @nested is nested in @clause.
4811 is_clause_nested (MonoExceptionClause *clause, MonoExceptionClause *nested)
4813 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER && is_clause_inside_range (nested, clause->data.filter_offset, clause->handler_offset))
4815 return is_clause_inside_range (nested, clause->try_offset, clause->try_offset + clause->try_len) ||
4816 is_clause_inside_range (nested, clause->handler_offset, clause->handler_offset + clause->handler_len);
4819 /* Test the relationship between 2 exception clauses. Follow P.1 12.4.2.7 of ECMA
4820 * the each pair of exception must have the following properties:
4821 * - one is fully nested on another (the outer must not be a filter clause) (the nested one must come earlier)
4822 * - completely disjoin (none of the 3 regions of each entry overlap with the other 3)
4823 * - mutual protection (protected block is EXACT the same, handlers are disjoin and all handler are catch or all handler are filter)
4826 verify_clause_relationship (VerifyContext *ctx, MonoExceptionClause *clause, MonoExceptionClause *to_test)
4828 /*clause is nested*/
4829 if (to_test->flags == MONO_EXCEPTION_CLAUSE_FILTER && is_clause_inside_range (clause, to_test->data.filter_offset, to_test->handler_offset)) {
4830 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clause inside filter"));
4834 /*wrong nesting order.*/
4835 if (is_clause_nested (clause, to_test)) {
4836 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Nested exception clause appears after enclosing clause"));
4840 /*mutual protection*/
4841 if (clause->try_offset == to_test->try_offset && clause->try_len == to_test->try_len) {
4842 /*handlers are not disjoint*/
4843 if (is_clause_in_range (to_test, HANDLER_START (clause), clause->handler_offset + clause->handler_len)) {
4844 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception handlers overlap"));
4847 /* handlers are not catch or filter */
4848 if (!IS_CATCH_OR_FILTER (clause) || !IS_CATCH_OR_FILTER (to_test)) {
4849 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clauses with shared protected block are neither catch or filter"));
4856 /*not completelly disjoint*/
4857 if ((is_clause_in_range (to_test, clause->try_offset, clause->try_offset + clause->try_len) ||
4858 is_clause_in_range (to_test, HANDLER_START (clause), clause->handler_offset + clause->handler_len)) && !is_clause_nested (to_test, clause))
4859 ADD_VERIFY_ERROR (ctx, g_strdup_printf ("Exception clauses overlap"));
4862 #define code_bounds_check(size) \
4863 if (ADDP_IS_GREATER_OR_OVF (ip, size, end)) {\
4864 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Code overrun starting with 0x%x at 0x%04x", *ip, ctx.ip_offset)); \
4869 mono_opcode_is_prefix (int op)
4872 case MONO_CEE_UNALIGNED_:
4873 case MONO_CEE_VOLATILE_:
4874 case MONO_CEE_TAIL_:
4875 case MONO_CEE_CONSTRAINED_:
4876 case MONO_CEE_READONLY_:
4883 * FIXME: need to distinguish between valid and verifiable.
4884 * Need to keep track of types on the stack.
4885 * Verify types for opcodes.
4888 mono_method_verify (MonoMethod *method, int level)
4891 const unsigned char *ip, *code_start;
4892 const unsigned char *end;
4893 MonoSimpleBasicBlock *bb = NULL, *original_bb = NULL;
4895 int i, n, need_merge = 0, start = 0;
4896 guint token, ip_offset = 0, prefix = 0;
4897 MonoGenericContext *generic_context = NULL;
4901 VERIFIER_DEBUG ( printf ("Verify IL for method %s %s %s\n", method->klass->name_space, method->klass->name, method->name); );
4903 if (method->iflags & (METHOD_IMPL_ATTRIBUTE_INTERNAL_CALL | METHOD_IMPL_ATTRIBUTE_RUNTIME) ||
4904 (method->flags & (METHOD_ATTRIBUTE_PINVOKE_IMPL | METHOD_ATTRIBUTE_ABSTRACT))) {
4908 memset (&ctx, 0, sizeof (VerifyContext));
4910 //FIXME use mono_method_get_signature_full
4911 ctx.signature = mono_method_signature (method);
4912 if (!ctx.signature) {
4913 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Could not decode method signature"));
4916 ctx.header = mono_method_get_header (method);
4918 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Could not decode method header"));
4921 ctx.method = method;
4922 code_start = ip = ctx.header->code;
4923 end = ip + ctx.header->code_size;
4924 ctx.image = image = method->klass->image;
4927 ctx.max_args = ctx.signature->param_count + ctx.signature->hasthis;
4928 ctx.max_stack = ctx.header->max_stack;
4929 ctx.verifiable = ctx.valid = 1;
4932 ctx.code = g_new (ILCodeDesc, ctx.header->code_size);
4933 ctx.code_size = ctx.header->code_size;
4935 memset(ctx.code, 0, sizeof (ILCodeDesc) * ctx.header->code_size);
4938 ctx.num_locals = ctx.header->num_locals;
4939 ctx.locals = g_memdup (ctx.header->locals, sizeof (MonoType*) * ctx.header->num_locals);
4941 if (ctx.num_locals > 0 && !ctx.header->init_locals)
4942 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Method with locals variable but without init locals set"));
4944 ctx.params = g_new (MonoType*, ctx.max_args);
4945 if (ctx.signature->hasthis)
4946 ctx.params [0] = method->klass->valuetype ? &method->klass->this_arg : &method->klass->byval_arg;
4947 memcpy (ctx.params + ctx.signature->hasthis, ctx.signature->params, sizeof (MonoType *) * ctx.signature->param_count);
4949 if (ctx.signature->is_inflated)
4950 ctx.generic_context = generic_context = mono_method_get_context (method);
4952 if (!generic_context && (method->klass->generic_container || method->is_generic)) {
4953 if (method->is_generic)
4954 ctx.generic_context = generic_context = &(mono_method_get_generic_container (method)->context);
4956 ctx.generic_context = generic_context = &method->klass->generic_container->context;
4959 for (i = 0; i < ctx.num_locals; ++i) {
4960 MonoType *uninflated = ctx.locals [i];
4961 ctx.locals [i] = mono_class_inflate_generic_type_checked (ctx.locals [i], ctx.generic_context, &error);
4962 if (!mono_error_ok (&error)) {
4963 char *name = mono_type_full_name (ctx.locals [i] ? ctx.locals [i] : uninflated);
4964 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid local %d of type %s", i, name));
4966 mono_error_cleanup (&error);
4967 /* we must not free (in cleanup) what was not yet allocated (but only copied) */
4973 for (i = 0; i < ctx.max_args; ++i) {
4974 MonoType *uninflated = ctx.params [i];
4975 ctx.params [i] = mono_class_inflate_generic_type_checked (ctx.params [i], ctx.generic_context, &error);
4976 if (!mono_error_ok (&error)) {
4977 char *name = mono_type_full_name (ctx.params [i] ? ctx.params [i] : uninflated);
4978 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid parameter %d of type %s", i, name));
4980 mono_error_cleanup (&error);
4981 /* we must not free (in cleanup) what was not yet allocated (but only copied) */
4986 stack_init (&ctx, &ctx.eval);
4988 for (i = 0; i < ctx.num_locals; ++i) {
4989 if (!mono_type_is_valid_in_context (&ctx, ctx.locals [i]))
4991 if (get_stack_type (ctx.locals [i]) == TYPE_INV) {
4992 char *name = mono_type_full_name (ctx.locals [i]);
4993 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid local %i of type %s", i, name));
5000 for (i = 0; i < ctx.max_args; ++i) {
5001 if (!mono_type_is_valid_in_context (&ctx, ctx.params [i]))
5004 if (get_stack_type (ctx.params [i]) == TYPE_INV) {
5005 char *name = mono_type_full_name (ctx.params [i]);
5006 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid parameter %i of type %s", i, name));
5015 for (i = 0; i < ctx.header->num_clauses && ctx.valid; ++i) {
5016 MonoExceptionClause *clause = ctx.header->clauses + i;
5017 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); );
5019 if (clause->try_offset > ctx.code_size || ADD_IS_GREATER_OR_OVF (clause->try_offset, clause->try_len, ctx.code_size))
5020 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try clause out of bounds at 0x%04x", clause->try_offset));
5022 if (clause->try_len <= 0)
5023 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try clause len <= 0 at 0x%04x", clause->try_offset));
5025 if (clause->handler_offset > ctx.code_size || ADD_IS_GREATER_OR_OVF (clause->handler_offset, clause->handler_len, ctx.code_size))
5026 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("handler clause out of bounds at 0x%04x", clause->try_offset));
5028 if (clause->handler_len <= 0)
5029 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("handler clause len <= 0 at 0x%04x", clause->try_offset));
5031 if (clause->try_offset < clause->handler_offset && ADD_IS_GREATER_OR_OVF (clause->try_offset, clause->try_len, HANDLER_START (clause)))
5032 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("try block (at 0x%04x) includes handler block (at 0x%04x)", clause->try_offset, clause->handler_offset));
5034 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
5035 if (clause->data.filter_offset > ctx.code_size)
5036 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("filter clause out of bounds at 0x%04x", clause->try_offset));
5038 if (clause->data.filter_offset >= clause->handler_offset)
5039 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("filter clause must come before the handler clause at 0x%04x", clause->data.filter_offset));
5042 for (n = i + 1; n < ctx.header->num_clauses && ctx.valid; ++n)
5043 verify_clause_relationship (&ctx, clause, ctx.header->clauses + n);
5048 ctx.code [clause->try_offset].flags |= IL_CODE_FLAG_WAS_TARGET;
5049 if (clause->try_offset + clause->try_len < ctx.code_size)
5050 ctx.code [clause->try_offset + clause->try_len].flags |= IL_CODE_FLAG_WAS_TARGET;
5051 if (clause->handler_offset + clause->handler_len < ctx.code_size)
5052 ctx.code [clause->handler_offset + clause->handler_len].flags |= IL_CODE_FLAG_WAS_TARGET;
5054 if (clause->flags == MONO_EXCEPTION_CLAUSE_NONE) {
5055 if (!clause->data.catch_class) {
5056 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Catch clause %d with invalid type", i));
5060 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->handler_offset, clause->data.catch_class);
5062 else if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
5063 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->data.filter_offset, mono_defaults.exception_class);
5064 init_stack_with_value_at_exception_boundary (&ctx, ctx.code + clause->handler_offset, mono_defaults.exception_class);
5068 original_bb = bb = mono_basic_block_split (method, &error);
5069 if (!mono_error_ok (&error)) {
5070 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid branch target: %s", mono_error_get_message (&error)));
5071 mono_error_cleanup (&error);
5076 while (ip < end && ctx.valid) {
5077 ip_offset = ip - code_start;
5079 const unsigned char *ip_copy = ip;
5082 if (ip_offset > bb->end) {
5083 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or EH block at [0x%04x] targets middle instruction at 0x%04x", bb->end, ip_offset));
5087 if (ip_offset == bb->end)
5090 size = mono_opcode_value_and_size (&ip_copy, end, &op);
5092 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction %x at 0x%04x", *ip, ip_offset));
5096 if (ADD_IS_GREATER_OR_OVF (ip_offset, size, bb->end)) {
5097 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or EH block targets middle of instruction at 0x%04x", ip_offset));
5101 /*Last Instruction*/
5102 if (ip_offset + size == bb->end && mono_opcode_is_prefix (op)) {
5103 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));
5108 /*FIXME remove this once we move all bad branch checking code to use BB only*/
5109 ctx.code [ip_offset].flags |= IL_CODE_FLAG_SEEN;
5115 ctx.ip_offset = ip_offset = ip - code_start;
5117 /*We need to check against fallthrou in and out of protected blocks.
5118 * For fallout we check the once a protected block ends, if the start flag is not set.
5119 * Likewise for fallthru in, we check if ip is the start of a protected block and start is not set
5120 * TODO convert these checks to be done using flags and not this loop
5122 for (i = 0; i < ctx.header->num_clauses && ctx.valid; ++i) {
5123 MonoExceptionClause *clause = ctx.header->clauses + i;
5125 if ((clause->try_offset + clause->try_len == ip_offset) && start == 0) {
5126 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallthru off try block at 0x%04x", ip_offset));
5130 if ((clause->handler_offset + clause->handler_len == ip_offset) && start == 0) {
5131 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER)
5132 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("fallout of handler block at 0x%04x", ip_offset));
5134 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallout of handler block at 0x%04x", ip_offset));
5138 if (clause->flags == MONO_EXCEPTION_CLAUSE_FILTER && clause->handler_offset == ip_offset && start == 0) {
5139 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("fallout of filter block at 0x%04x", ip_offset));
5143 if (clause->handler_offset == ip_offset && start == 0) {
5144 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("fallthru handler block at 0x%04x", ip_offset));
5148 if (clause->try_offset == ip_offset && ctx.eval.size > 0 && start == 0) {
5149 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Try to enter try block with a non-empty stack at 0x%04x", ip_offset));
5158 VERIFIER_DEBUG ( printf ("extra merge needed! 0x%04x \n", ctx.target); );
5159 merge_stacks (&ctx, &ctx.eval, &ctx.code [ctx.target], FALSE, TRUE);
5162 merge_stacks (&ctx, &ctx.eval, &ctx.code[ip_offset], start, FALSE);
5165 /*TODO we can fast detect a forward branch or exception block targeting code after prefix, we should fail fast*/
5166 #ifdef MONO_VERIFIER_DEBUG
5169 discode = mono_disasm_code_one (NULL, method, ip, NULL);
5170 discode [strlen (discode) - 1] = 0; /* no \n */
5171 g_print ("[%d] %-29s (%d)\n", ip_offset, discode, ctx.eval.size);
5174 dump_stack_state (&ctx.code [ip_offset]);
5175 dump_stack_state (&ctx.eval);
5188 push_arg (&ctx, *ip - CEE_LDARG_0, FALSE);
5194 code_bounds_check (2);
5195 push_arg (&ctx, ip [1], *ip == CEE_LDARGA_S);
5199 case CEE_ADD_OVF_UN:
5200 do_binop (&ctx, *ip, add_ovf_un_table);
5204 case CEE_SUB_OVF_UN:
5205 do_binop (&ctx, *ip, sub_ovf_un_table);
5212 case CEE_MUL_OVF_UN:
5213 do_binop (&ctx, *ip, bin_ovf_table);
5218 do_binop (&ctx, *ip, add_table);
5223 do_binop (&ctx, *ip, sub_table);
5230 do_binop (&ctx, *ip, bin_op_table);
5239 do_binop (&ctx, *ip, int_bin_op_table);
5246 do_binop (&ctx, *ip, shift_op_table);
5251 if (!check_underflow (&ctx, 1))
5253 stack_pop_safe (&ctx);
5267 /*TODO support definite assignment verification? */
5268 push_local (&ctx, *ip - CEE_LDLOC_0, FALSE);
5276 store_local (&ctx, *ip - CEE_STLOC_0);
5281 code_bounds_check (2);
5282 store_local (&ctx, ip [1]);
5287 code_bounds_check (2);
5288 store_arg (&ctx, ip [1]);
5302 if (check_overflow (&ctx))
5303 stack_push_val (&ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
5308 code_bounds_check (2);
5309 if (check_overflow (&ctx))
5310 stack_push_val (&ctx, TYPE_I4, &mono_defaults.int32_class->byval_arg);
5315 code_bounds_check (5);
5316 if (check_overflow (&ctx))
5317 stack_push_val (&ctx,TYPE_I4, &mono_defaults.int32_class->byval_arg);
5322 code_bounds_check (9);
5323 if (check_overflow (&ctx))
5324 stack_push_val (&ctx,TYPE_I8, &mono_defaults.int64_class->byval_arg);
5329 code_bounds_check (5);
5330 if (check_overflow (&ctx))
5331 stack_push_val (&ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
5336 code_bounds_check (9);
5337 if (check_overflow (&ctx))
5338 stack_push_val (&ctx, TYPE_R8, &mono_defaults.double_class->byval_arg);
5343 if (check_overflow (&ctx))
5344 stack_push_val (&ctx, TYPE_COMPLEX | NULL_LITERAL_MASK, &mono_defaults.object_class->byval_arg);
5350 code_bounds_check (2);
5351 do_branch_op (&ctx, (signed char)ip [1] + 2, cmp_br_eq_op);
5364 code_bounds_check (2);
5365 do_branch_op (&ctx, (signed char)ip [1] + 2, cmp_br_op);
5372 code_bounds_check (5);
5373 do_branch_op (&ctx, (gint32)read32 (ip + 1) + 5, cmp_br_eq_op);
5386 code_bounds_check (5);
5387 do_branch_op (&ctx, (gint32)read32 (ip + 1) + 5, cmp_br_op);
5394 code_bounds_check (2);
5395 push_local (&ctx, ip[1], *ip == CEE_LDLOCA_S);
5400 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5406 if (!check_underflow (&ctx, 1))
5408 if (!check_overflow (&ctx))
5410 top = stack_pop_safe (&ctx);
5411 copy_stack_value (stack_push (&ctx), top);
5412 copy_stack_value (stack_push (&ctx), top);
5418 code_bounds_check (5);
5420 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Eval stack must be empty in jmp at 0x%04x", ip_offset));
5421 token = read32 (ip + 1);
5422 if (in_any_block (ctx.header, ip_offset))
5423 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("jmp cannot escape exception blocks at 0x%04x", ip_offset));
5425 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Intruction jmp is not verifiable at 0x%04x", ctx.ip_offset));
5427 * FIXME: check signature, retval, arguments etc.
5433 code_bounds_check (5);
5434 do_invoke_method (&ctx, read32 (ip + 1), *ip == CEE_CALLVIRT);
5439 code_bounds_check (5);
5440 token = read32 (ip + 1);
5442 * FIXME: check signature, retval, arguments etc.
5443 * FIXME: check requirements for tail call
5445 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Intruction calli is not verifiable at 0x%04x", ctx.ip_offset));
5449 code_bounds_check (2);
5450 do_static_branch (&ctx, (signed char)ip [1] + 2);
5458 code_bounds_check (2);
5459 do_boolean_branch_op (&ctx, (signed char)ip [1] + 2);
5465 code_bounds_check (5);
5466 do_static_branch (&ctx, (gint32)read32 (ip + 1) + 5);
5474 code_bounds_check (5);
5475 do_boolean_branch_op (&ctx, (gint32)read32 (ip + 1) + 5);
5482 code_bounds_check (5);
5483 entries = read32 (ip + 1);
5485 if (entries > 0xFFFFFFFFU / sizeof (guint32))
5486 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Too many switch entries %x at 0x%04x", entries, ctx.ip_offset));
5489 code_bounds_check (sizeof (guint32) * entries);
5491 do_switch (&ctx, entries, ip);
5493 ip += sizeof (guint32) * entries;
5507 do_load_indirect (&ctx, *ip);
5519 do_store_indirect (&ctx, *ip);
5525 do_unary_math_op (&ctx, *ip);
5535 do_conversion (&ctx, TYPE_I4);
5541 do_conversion (&ctx, TYPE_I8);
5548 do_conversion (&ctx, TYPE_R8);
5554 do_conversion (&ctx, TYPE_NATIVE_INT);
5559 code_bounds_check (5);
5560 do_cpobj (&ctx, read32 (ip + 1));
5565 code_bounds_check (5);
5566 do_ldobj_value (&ctx, read32 (ip + 1));
5571 code_bounds_check (5);
5572 do_ldstr (&ctx, read32 (ip + 1));
5577 code_bounds_check (5);
5578 do_newobj (&ctx, read32 (ip + 1));
5584 code_bounds_check (5);
5585 do_cast (&ctx, read32 (ip + 1), *ip == CEE_CASTCLASS ? "castclass" : "isinst");
5591 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5596 code_bounds_check (5);
5597 do_unbox_value (&ctx, read32 (ip + 1));
5609 code_bounds_check (5);
5610 do_push_field (&ctx, read32 (ip + 1), *ip == CEE_LDFLDA);
5616 code_bounds_check (5);
5617 do_push_static_field (&ctx, read32 (ip + 1), *ip == CEE_LDSFLDA);
5622 code_bounds_check (5);
5623 do_store_field (&ctx, read32 (ip + 1));
5628 code_bounds_check (5);
5629 do_store_static_field (&ctx, read32 (ip + 1));
5634 code_bounds_check (5);
5635 do_stobj (&ctx, read32 (ip + 1));
5639 case CEE_CONV_OVF_I1_UN:
5640 case CEE_CONV_OVF_I2_UN:
5641 case CEE_CONV_OVF_I4_UN:
5642 case CEE_CONV_OVF_U1_UN:
5643 case CEE_CONV_OVF_U2_UN:
5644 case CEE_CONV_OVF_U4_UN:
5645 do_conversion (&ctx, TYPE_I4);
5649 case CEE_CONV_OVF_I8_UN:
5650 case CEE_CONV_OVF_U8_UN:
5651 do_conversion (&ctx, TYPE_I8);
5655 case CEE_CONV_OVF_I_UN:
5656 case CEE_CONV_OVF_U_UN:
5657 do_conversion (&ctx, TYPE_NATIVE_INT);
5662 code_bounds_check (5);
5663 do_box_value (&ctx, read32 (ip + 1));
5668 code_bounds_check (5);
5669 do_newarr (&ctx, read32 (ip + 1));
5679 code_bounds_check (5);
5680 do_ldelema (&ctx, read32 (ip + 1));
5694 case CEE_LDELEM_REF:
5695 do_ldelem (&ctx, *ip, 0);
5706 case CEE_STELEM_REF:
5707 do_stelem (&ctx, *ip, 0);
5712 code_bounds_check (5);
5713 do_ldelem (&ctx, *ip, read32 (ip + 1));
5718 code_bounds_check (5);
5719 do_stelem (&ctx, *ip, read32 (ip + 1));
5724 code_bounds_check (5);
5725 do_unbox_any (&ctx, read32 (ip + 1));
5729 case CEE_CONV_OVF_I1:
5730 case CEE_CONV_OVF_U1:
5731 case CEE_CONV_OVF_I2:
5732 case CEE_CONV_OVF_U2:
5733 case CEE_CONV_OVF_I4:
5734 case CEE_CONV_OVF_U4:
5735 do_conversion (&ctx, TYPE_I4);
5739 case CEE_CONV_OVF_I8:
5740 case CEE_CONV_OVF_U8:
5741 do_conversion (&ctx, TYPE_I8);
5745 case CEE_CONV_OVF_I:
5746 case CEE_CONV_OVF_U:
5747 do_conversion (&ctx, TYPE_NATIVE_INT);
5752 code_bounds_check (5);
5753 do_refanyval (&ctx, read32 (ip + 1));
5763 code_bounds_check (5);
5764 do_mkrefany (&ctx, read32 (ip + 1));
5769 code_bounds_check (5);
5770 do_load_token (&ctx, read32 (ip + 1));
5774 case CEE_ENDFINALLY:
5775 if (!is_correct_endfinally (ctx.header, ip_offset))
5776 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("endfinally must be used inside a finally/fault handler at 0x%04x", ctx.ip_offset));
5783 code_bounds_check (5);
5784 do_leave (&ctx, read32 (ip + 1) + 5);
5790 code_bounds_check (2);
5791 do_leave (&ctx, (signed char)ip [1] + 2);
5797 code_bounds_check (2);
5801 code_bounds_check (3);
5802 store_local (&ctx, read16 (ip + 1));
5807 do_cmp_op (&ctx, cmp_br_eq_op, *ip);
5815 do_cmp_op (&ctx, cmp_br_op, *ip);
5820 code_bounds_check (3);
5821 store_arg (&ctx, read16 (ip + 1) );
5827 check_overflow (&ctx);
5828 if (ctx.signature->call_convention != MONO_CALL_VARARG)
5829 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Cannot use arglist on method without VARGARG calling convention at 0x%04x", ctx.ip_offset));
5830 set_stack_value (&ctx, stack_push (&ctx), &mono_defaults.argumenthandle_class->byval_arg, FALSE);
5835 code_bounds_check (5);
5836 do_load_function_ptr (&ctx, read32 (ip + 1), FALSE);
5841 code_bounds_check (5);
5842 do_load_function_ptr (&ctx, read32 (ip + 1), TRUE);
5848 code_bounds_check (3);
5849 push_arg (&ctx, read16 (ip + 1), *ip == CEE_LDARGA);
5855 code_bounds_check (3);
5856 push_local (&ctx, read16 (ip + 1), *ip == CEE_LDLOCA);
5869 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Use of the `unused' opcode"));
5873 do_endfilter (&ctx);
5877 case CEE_UNALIGNED_:
5878 code_bounds_check (2);
5879 prefix |= PREFIX_UNALIGNED;
5883 prefix |= PREFIX_VOLATILE;
5887 prefix |= PREFIX_TAIL;
5889 if (ip < end && (*ip != CEE_CALL && *ip != CEE_CALLI && *ip != CEE_CALLVIRT))
5890 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("tail prefix must be used only with call opcodes at 0x%04x", ip_offset));
5894 code_bounds_check (5);
5895 do_initobj (&ctx, read32 (ip + 1));
5899 case CEE_CONSTRAINED_:
5900 code_bounds_check (5);
5901 ctx.constrained_type = get_boxable_mono_type (&ctx, read32 (ip + 1), "constrained.");
5902 prefix |= PREFIX_CONSTRAINED;
5907 prefix |= PREFIX_READONLY;
5912 CLEAR_PREFIX (&ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
5913 if (!check_underflow (&ctx, 3))
5915 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Instruction cpblk is not verifiable at 0x%04x", ctx.ip_offset));
5920 CLEAR_PREFIX (&ctx, PREFIX_UNALIGNED | PREFIX_VOLATILE);
5921 if (!check_underflow (&ctx, 3))
5923 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Instruction initblk is not verifiable at 0x%04x", ctx.ip_offset));
5931 if (!is_correct_rethrow (ctx.header, ip_offset))
5932 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("rethrow must be used inside a catch handler at 0x%04x", ctx.ip_offset));
5939 code_bounds_check (5);
5940 do_sizeof (&ctx, read32 (ip + 1));
5944 case CEE_REFANYTYPE:
5945 do_refanytype (&ctx);
5950 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction FE %x at 0x%04x", *ip, ctx.ip_offset));
5956 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction %x at 0x%04x", *ip, ctx.ip_offset));
5960 /*TODO we can fast detect a forward branch or exception block targeting code after prefix, we should fail fast*/
5962 if (!ctx.prefix_set) //first prefix
5963 ctx.code [ctx.ip_offset].flags |= IL_CODE_FLAG_SEEN;
5964 ctx.prefix_set |= prefix;
5965 ctx.has_flags = TRUE;
5969 ctx.code [ctx.ip_offset].flags |= IL_CODE_FLAG_SEEN;
5971 if (ctx.prefix_set & PREFIX_CONSTRAINED)
5972 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after constrained prefix at 0x%04x", ctx.ip_offset));
5973 if (ctx.prefix_set & PREFIX_READONLY)
5974 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after readonly prefix at 0x%04x", ctx.ip_offset));
5975 if (ctx.prefix_set & PREFIX_VOLATILE)
5976 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after volatile prefix at 0x%04x", ctx.ip_offset));
5977 if (ctx.prefix_set & PREFIX_UNALIGNED)
5978 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Invalid instruction after unaligned prefix at 0x%04x", ctx.ip_offset));
5979 ctx.prefix_set = prefix = 0;
5980 ctx.has_flags = FALSE;
5984 * if ip != end we overflowed: mark as error.
5986 if ((ip != end || !start) && ctx.verifiable && !ctx.list) {
5987 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Run ahead of method code at 0x%04x", ip_offset));
5990 /*We should guard against the last decoded opcode, otherwise we might add errors that doesn't make sense.*/
5991 for (i = 0; i < ctx.code_size && i < ip_offset; ++i) {
5992 if (ctx.code [i].flags & IL_CODE_FLAG_WAS_TARGET) {
5993 if (!(ctx.code [i].flags & IL_CODE_FLAG_SEEN))
5994 ADD_VERIFY_ERROR (&ctx, g_strdup_printf ("Branch or exception block target middle of intruction at 0x%04x", i));
5996 if (ctx.code [i].flags & IL_CODE_DELEGATE_SEQUENCE)
5997 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Branch to delegate code sequence at 0x%04x", i));
5999 if ((ctx.code [i].flags & IL_CODE_LDFTN_DELEGATE_NONFINAL_VIRTUAL) && ctx.has_this_store)
6000 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Invalid ldftn with virtual function in method with stdarg 0 at 0x%04x", i));
6002 if ((ctx.code [i].flags & IL_CODE_CALL_NONFINAL_VIRTUAL) && ctx.has_this_store)
6003 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));
6006 if (mono_method_is_constructor (ctx.method) && !ctx.super_ctor_called && !ctx.method->klass->valuetype && ctx.method->klass != mono_defaults.object_class) {
6007 char *method_name = mono_method_full_name (ctx.method, TRUE);
6008 char *type = mono_type_get_full_name (ctx.method->klass);
6009 if (ctx.method->klass->parent && ctx.method->klass->parent->exception_type != MONO_EXCEPTION_NONE)
6010 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));
6012 CODE_NOT_VERIFIABLE (&ctx, g_strdup_printf ("Constructor %s for type %s not calling base type ctor.", method_name, type));
6013 g_free (method_name);
6019 for (i = 0; i < ctx.header->code_size; ++i) {
6020 if (ctx.code [i].stack)
6021 g_free (ctx.code [i].stack);
6025 for (tmp = ctx.funptrs; tmp; tmp = tmp->next)
6027 g_slist_free (ctx.funptrs);
6029 for (tmp = ctx.exception_types; tmp; tmp = tmp->next)
6030 mono_metadata_free_type (tmp->data);
6031 g_slist_free (ctx.exception_types);
6033 for (i = 0; i < ctx.num_locals; ++i) {
6035 mono_metadata_free_type (ctx.locals [i]);
6037 for (i = 0; i < ctx.max_args; ++i) {
6039 mono_metadata_free_type (ctx.params [i]);
6043 g_free (ctx.eval.stack);
6046 g_free (ctx.locals);
6047 g_free (ctx.params);
6048 mono_basic_block_free (original_bb);
6049 mono_metadata_free_mh (ctx.header);
6055 mono_verify_corlib ()
6057 /* This is a public API function so cannot be removed */
6062 * Returns true if @method needs to be verified.
6066 mono_verifier_is_enabled_for_method (MonoMethod *method)
6068 return mono_verifier_is_enabled_for_class (method->klass) && method->wrapper_type == MONO_WRAPPER_NONE;
6072 * Returns true if @klass need to be verified.
6076 mono_verifier_is_enabled_for_class (MonoClass *klass)
6078 return verify_all || (verifier_mode > MONO_VERIFIER_MODE_OFF && !klass->image->assembly->in_gac && klass->image != mono_defaults.corlib);
6082 mono_verifier_is_enabled_for_image (MonoImage *image)
6084 return verify_all || verifier_mode > MONO_VERIFIER_MODE_OFF;
6088 mono_verifier_is_method_full_trust (MonoMethod *method)
6090 return mono_verifier_is_class_full_trust (method->klass);
6094 * Returns if @klass is under full trust or not.
6096 * TODO This code doesn't take CAS into account.
6098 * Under verify_all all user code must be verifiable if no security option was set
6102 mono_verifier_is_class_full_trust (MonoClass *klass)
6104 /* under CoreCLR code is trusted if it is part of the "platform" otherwise all code inside the GAC is trusted */
6105 gboolean trusted_location = (mono_security_get_mode () != MONO_SECURITY_MODE_CORE_CLR) ?
6106 klass->image->assembly->in_gac : mono_security_core_clr_is_platform_image (klass->image);
6108 if (verify_all && verifier_mode == MONO_VERIFIER_MODE_OFF)
6109 return trusted_location || klass->image == mono_defaults.corlib;
6110 return verifier_mode < MONO_VERIFIER_MODE_VERIFIABLE || trusted_location || klass->image == mono_defaults.corlib;
6114 mono_method_verify_with_current_settings (MonoMethod *method, gboolean skip_visibility)
6116 return mono_method_verify (method,
6117 (verifier_mode != MONO_VERIFIER_MODE_STRICT ? MONO_VERIFY_NON_STRICT: 0)
6118 | (!mono_verifier_is_method_full_trust (method) ? MONO_VERIFY_FAIL_FAST : 0)
6119 | (skip_visibility ? MONO_VERIFY_SKIP_VISIBILITY : 0));
6123 get_field_end (MonoClassField *field)
6126 int size = mono_type_size (field->type, &align);
6128 size = 4; /*FIXME Is this a safe bet?*/
6129 return size + field->offset;
6133 verify_class_for_overlapping_reference_fields (MonoClass *class)
6136 gpointer iter = NULL;
6137 MonoClassField *field;
6138 gboolean is_fulltrust = mono_verifier_is_class_full_trust (class);
6139 /*We can't skip types with !has_references since this is calculated after we have run.*/
6140 if (!((class->flags & TYPE_ATTRIBUTE_LAYOUT_MASK) == TYPE_ATTRIBUTE_EXPLICIT_LAYOUT))
6144 /*We must check for stuff overlapping reference fields.
6145 The outer loop uses mono_class_get_fields to ensure that MonoClass:fields get inited.
6147 while ((field = mono_class_get_fields (class, &iter))) {
6148 int fieldEnd = get_field_end (field);
6149 gboolean is_valuetype = !MONO_TYPE_IS_REFERENCE (field->type);
6152 if (mono_field_is_deleted (field) || (field->type->attrs & FIELD_ATTRIBUTE_STATIC))
6155 for (j = i; j < class->field.count; ++j) {
6156 MonoClassField *other = &class->fields [j];
6157 int otherEnd = get_field_end (other);
6158 if (mono_field_is_deleted (other) || (is_valuetype && !MONO_TYPE_IS_REFERENCE (other->type)) || (other->type->attrs & FIELD_ATTRIBUTE_STATIC))
6161 if (!is_valuetype && MONO_TYPE_IS_REFERENCE (other->type) && field->offset == other->offset && is_fulltrust)
6164 if ((otherEnd > field->offset && otherEnd <= fieldEnd) || (other->offset >= field->offset && other->offset < fieldEnd))
6172 field_hash (gconstpointer key)
6174 const MonoClassField *field = key;
6175 return g_str_hash (field->name) ^ mono_metadata_type_hash (field->type); /**/
6179 field_equals (gconstpointer _a, gconstpointer _b)
6181 const MonoClassField *a = _a;
6182 const MonoClassField *b = _b;
6183 return !strcmp (a->name, b->name) && mono_metadata_type_equal (a->type, b->type);
6188 verify_class_fields (MonoClass *class)
6190 gpointer iter = NULL;
6191 MonoClassField *field;
6192 MonoGenericContext *context = mono_class_get_context (class);
6193 GHashTable *unique_fields = g_hash_table_new_full (&field_hash, &field_equals, NULL, NULL);
6194 if (class->generic_container)
6195 context = &class->generic_container->context;
6197 while ((field = mono_class_get_fields (class, &iter)) != NULL) {
6198 if (!mono_type_is_valid_type_in_context (field->type, context)) {
6199 g_hash_table_destroy (unique_fields);
6202 if (g_hash_table_lookup (unique_fields, field)) {
6203 g_hash_table_destroy (unique_fields);
6206 g_hash_table_insert (unique_fields, field, field);
6208 g_hash_table_destroy (unique_fields);
6213 verify_interfaces (MonoClass *class)
6216 for (i = 0; i < class->interface_count; ++i) {
6217 MonoClass *iface = class->interfaces [i];
6218 if (!(iface->flags & TYPE_ATTRIBUTE_INTERFACE))
6225 verify_valuetype_layout_with_target (MonoClass *class, MonoClass *target_class)
6228 gpointer iter = NULL;
6229 MonoClassField *field;
6230 MonoClass *field_class;
6232 if (!class->valuetype)
6235 type = class->byval_arg.type;
6236 /*primitive type fields are not properly decoded*/
6237 if ((type >= MONO_TYPE_BOOLEAN && type <= MONO_TYPE_R8) || (type >= MONO_TYPE_I && type <= MONO_TYPE_U))
6240 while ((field = mono_class_get_fields (class, &iter)) != NULL) {
6244 if (field->type->attrs & (FIELD_ATTRIBUTE_STATIC | FIELD_ATTRIBUTE_HAS_FIELD_RVA))
6247 field_class = mono_class_get_generic_type_definition (mono_class_from_mono_type (field->type));
6249 if (field_class == target_class || class == field_class || !verify_valuetype_layout_with_target (field_class, target_class))
6257 verify_valuetype_layout (MonoClass *class)
6260 res = verify_valuetype_layout_with_target (class, class);
6265 * Check if the class is verifiable.
6267 * Right now there are no conditions that make a class a valid but not verifiable. Both overlapping reference
6268 * field and invalid generic instantiation are fatal errors.
6270 * This method must be safe to be called from mono_class_init and all code must be carefull about that.
6274 mono_verifier_verify_class (MonoClass *class)
6276 /*Neither <Module>, object or ifaces have parent.*/
6277 if (!class->parent &&
6278 class != mono_defaults.object_class &&
6279 !MONO_CLASS_IS_INTERFACE (class) &&
6280 (!class->image->dynamic && class->type_token != 0x2000001)) /*<Module> is the first type in the assembly*/
6282 if (class->parent && MONO_CLASS_IS_INTERFACE (class->parent))
6284 if (class->generic_container && (class->flags & TYPE_ATTRIBUTE_LAYOUT_MASK) == TYPE_ATTRIBUTE_EXPLICIT_LAYOUT)
6286 if (!verify_class_for_overlapping_reference_fields (class))
6288 if (class->generic_class && !mono_class_is_valid_generic_instantiation (NULL, class))
6290 if (class->generic_class == NULL && !verify_class_fields (class))
6292 if (class->valuetype && !verify_valuetype_layout (class))
6294 if (!verify_interfaces (class))
6301 mono_verifier_verify_class (MonoClass *class)
6303 /* The verifier was disabled at compile time */
6308 mono_method_verify_with_current_settings (MonoMethod *method, gboolean skip_visibility)
6310 /* The verifier was disabled at compile time */
6315 mono_verifier_is_class_full_trust (MonoClass *klass)
6317 /* The verifier was disabled at compile time */
6322 mono_verifier_is_method_full_trust (MonoMethod *method)
6324 /* The verifier was disabled at compile time */
6329 mono_verifier_is_enabled_for_image (MonoImage *image)
6331 /* The verifier was disabled at compile time */
6336 mono_verifier_is_enabled_for_class (MonoClass *klass)
6338 /* The verifier was disabled at compile time */
6343 mono_verifier_is_enabled_for_method (MonoMethod *method)
6345 /* The verifier was disabled at compile time */
6350 mono_method_verify (MonoMethod *method, int level)
6352 /* The verifier was disabled at compile time */
6357 mono_free_verify_list (GSList *list)
6359 /* The verifier was disabled at compile time */
6360 /* will always be null if verifier is disabled */
6364 mono_image_verify_tables (MonoImage *image, int level)
6366 /* The verifier was disabled at compile time */