/
verify.c
2651 lines (2501 loc) · 82.5 KB
/
verify.c
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#include <mono/metadata/object-internals.h>
#include <mono/metadata/verify.h>
#include <mono/metadata/opcodes.h>
#include <mono/metadata/tabledefs.h>
#include <mono/metadata/reflection.h>
#include <mono/metadata/debug-helpers.h>
#include <mono/metadata/mono-endian.h>
#include <mono/metadata/metadata.h>
#include <mono/metadata/metadata-internals.h>
#include <mono/metadata/class-internals.h>
#include <mono/metadata/tokentype.h>
#include <string.h>
#include <signal.h>
#include <ctype.h>
/*
* Pull the list of opcodes
*/
#define OPDEF(a,b,c,d,e,f,g,h,i,j) \
a = i,
enum {
#include "mono/cil/opcode.def"
LAST = 0xff
};
#undef OPDEF
void
mono_free_verify_list (GSList *list)
{
MonoVerifyInfo* info;
GSList *tmp;
for (tmp = list; tmp; tmp = tmp->next) {
info = tmp->data;
g_free (info->message);
g_free (info);
}
g_slist_free (list);
}
#define ADD_ERROR(list,msg) \
do { \
MonoVerifyInfo *vinfo = g_new (MonoVerifyInfo, 1); \
vinfo->status = MONO_VERIFY_ERROR; \
vinfo->message = (msg); \
(list) = g_slist_prepend ((list), vinfo); \
} while (0)
#define ADD_WARN(list,code,msg) \
do { \
MonoVerifyInfo *vinfo = g_new (MonoVerifyInfo, 1); \
vinfo->status = (code); \
vinfo->message = (msg); \
(list) = g_slist_prepend ((list), vinfo); \
} while (0)
static const char* const
valid_cultures[] = {
"ar-SA", "ar-IQ", "ar-EG", "ar-LY",
"ar-DZ", "ar-MA", "ar-TN", "ar-OM",
"ar-YE", "ar-SY", "ar-JO", "ar-LB",
"ar-KW", "ar-AE", "ar-BH", "ar-QA",
"bg-BG", "ca-ES", "zh-TW", "zh-CN",
"zh-HK", "zh-SG", "zh-MO", "cs-CZ",
"da-DK", "de-DE", "de-CH", "de-AT",
"de-LU", "de-LI", "el-GR", "en-US",
"en-GB", "en-AU", "en-CA", "en-NZ",
"en-IE", "en-ZA", "en-JM", "en-CB",
"en-BZ", "en-TT", "en-ZW", "en-PH",
"es-ES-Ts", "es-MX", "es-ES-Is", "es-GT",
"es-CR", "es-PA", "es-DO", "es-VE",
"es-CO", "es-PE", "es-AR", "es-EC",
"es-CL", "es-UY", "es-PY", "es-BO",
"es-SV", "es-HN", "es-NI", "es-PR",
"Fi-FI", "fr-FR", "fr-BE", "fr-CA",
"Fr-CH", "fr-LU", "fr-MC", "he-IL",
"hu-HU", "is-IS", "it-IT", "it-CH",
"Ja-JP", "ko-KR", "nl-NL", "nl-BE",
"nb-NO", "nn-NO", "pl-PL", "pt-BR",
"pt-PT", "ro-RO", "ru-RU", "hr-HR",
"Lt-sr-SP", "Cy-sr-SP", "sk-SK", "sq-AL",
"sv-SE", "sv-FI", "th-TH", "tr-TR",
"ur-PK", "id-ID", "uk-UA", "be-BY",
"sl-SI", "et-EE", "lv-LV", "lt-LT",
"fa-IR", "vi-VN", "hy-AM", "Lt-az-AZ",
"Cy-az-AZ",
"eu-ES", "mk-MK", "af-ZA",
"ka-GE", "fo-FO", "hi-IN", "ms-MY",
"ms-BN", "kk-KZ", "ky-KZ", "sw-KE",
"Lt-uz-UZ", "Cy-uz-UZ", "tt-TA", "pa-IN",
"gu-IN", "ta-IN", "te-IN", "kn-IN",
"mr-IN", "sa-IN", "mn-MN", "gl-ES",
"kok-IN", "syr-SY", "div-MV",
NULL
};
static int
is_valid_culture (const char *cname)
{
int i;
int found;
found = *cname == 0;
for (i = 0; !found && valid_cultures [i]; ++i) {
if (g_strcasecmp (valid_cultures [i], cname))
found = 1;
}
return found;
}
static int
is_valid_assembly_flags (guint32 flags) {
/* Metadata: 22.1.2 */
flags &= ~(0x8000 | 0x4000); /* ignore reserved bits 0x0030? */
return ((flags == 1) || (flags == 0));
}
static int
is_valid_blob (MonoImage *image, guint32 blob_index, int notnull)
{
guint32 size;
const char *p, *blob_end;
if (blob_index >= image->heap_blob.size)
return 0;
p = mono_metadata_blob_heap (image, blob_index);
size = mono_metadata_decode_blob_size (p, &blob_end);
if (blob_index + size + (blob_end-p) > image->heap_blob.size)
return 0;
if (notnull && !size)
return 0;
return 1;
}
static const char*
is_valid_string (MonoImage *image, guint32 str_index, int notnull)
{
const char *p, *blob_end, *res;
if (str_index >= image->heap_strings.size)
return NULL;
res = p = mono_metadata_string_heap (image, str_index);
blob_end = mono_metadata_string_heap (image, image->heap_strings.size - 1);
if (notnull && !*p)
return 0;
/*
* FIXME: should check it's a valid utf8 string, too.
*/
while (p <= blob_end) {
if (!*p)
return res;
++p;
}
return *p? NULL: res;
}
static int
is_valid_cls_ident (const char *p)
{
/*
* FIXME: we need the full unicode glib support for this.
* Check: http://www.unicode.org/unicode/reports/tr15/Identifier.java
* We do the lame thing for now.
*/
if (!isalpha (*p))
return 0;
++p;
while (*p) {
if (!isalnum (*p) && *p != '_')
return 0;
++p;
}
return 1;
}
static int
is_valid_filename (const char *p)
{
if (!*p)
return 0;
return strpbrk (p, "\\//:")? 0: 1;
}
static GSList*
verify_assembly_table (MonoImage *image, GSList *list, int level)
{
MonoTableInfo *t = &image->tables [MONO_TABLE_ASSEMBLY];
guint32 cols [MONO_ASSEMBLY_SIZE];
const char *p;
if (level & MONO_VERIFY_ERROR) {
if (t->rows > 1)
ADD_ERROR (list, g_strdup ("Assembly table may only have 0 or 1 rows"));
mono_metadata_decode_row (t, 0, cols, MONO_ASSEMBLY_SIZE);
switch (cols [MONO_ASSEMBLY_HASH_ALG]) {
case ASSEMBLY_HASH_NONE:
case ASSEMBLY_HASH_MD5:
case ASSEMBLY_HASH_SHA1:
break;
default:
ADD_ERROR (list, g_strdup_printf ("Hash algorithm 0x%x unknown", cols [MONO_ASSEMBLY_HASH_ALG]));
}
if (!is_valid_assembly_flags (cols [MONO_ASSEMBLY_FLAGS]))
ADD_ERROR (list, g_strdup_printf ("Invalid flags in assembly: 0x%x", cols [MONO_ASSEMBLY_FLAGS]));
if (!is_valid_blob (image, cols [MONO_ASSEMBLY_PUBLIC_KEY], FALSE))
ADD_ERROR (list, g_strdup ("Assembly public key is an invalid index"));
if (!(p = is_valid_string (image, cols [MONO_ASSEMBLY_NAME], TRUE))) {
ADD_ERROR (list, g_strdup ("Assembly name is invalid"));
} else {
if (strpbrk (p, ":\\/."))
ADD_ERROR (list, g_strdup_printf ("Assembly name `%s' contains invalid chars", p));
}
if (!(p = is_valid_string (image, cols [MONO_ASSEMBLY_CULTURE], FALSE))) {
ADD_ERROR (list, g_strdup ("Assembly culture is an invalid index"));
} else {
if (!is_valid_culture (p))
ADD_ERROR (list, g_strdup_printf ("Assembly culture `%s' is invalid", p));
}
}
return list;
}
static GSList*
verify_assemblyref_table (MonoImage *image, GSList *list, int level)
{
MonoTableInfo *t = &image->tables [MONO_TABLE_ASSEMBLYREF];
guint32 cols [MONO_ASSEMBLYREF_SIZE];
const char *p;
int i;
if (level & MONO_VERIFY_ERROR) {
for (i = 0; i < t->rows; ++i) {
mono_metadata_decode_row (t, i, cols, MONO_ASSEMBLYREF_SIZE);
if (!is_valid_assembly_flags (cols [MONO_ASSEMBLYREF_FLAGS]))
ADD_ERROR (list, g_strdup_printf ("Invalid flags in assemblyref row %d: 0x%x", i + 1, cols [MONO_ASSEMBLY_FLAGS]));
if (!is_valid_blob (image, cols [MONO_ASSEMBLYREF_PUBLIC_KEY], FALSE))
ADD_ERROR (list, g_strdup_printf ("AssemblyRef public key in row %d is an invalid index", i + 1));
if (!(p = is_valid_string (image, cols [MONO_ASSEMBLYREF_CULTURE], FALSE))) {
ADD_ERROR (list, g_strdup_printf ("AssemblyRef culture in row %d is invalid", i + 1));
} else {
if (!is_valid_culture (p))
ADD_ERROR (list, g_strdup_printf ("AssemblyRef culture `%s' in row %d is invalid", p, i + 1));
}
if (cols [MONO_ASSEMBLYREF_HASH_VALUE] && !is_valid_blob (image, cols [MONO_ASSEMBLYREF_HASH_VALUE], TRUE))
ADD_ERROR (list, g_strdup_printf ("AssemblyRef hash value in row %d is invalid or not null and empty", i + 1));
}
}
if (level & MONO_VERIFY_WARNING) {
/* check for duplicated rows */
for (i = 0; i < t->rows; ++i) {
}
}
return list;
}
static GSList*
verify_class_layout_table (MonoImage *image, GSList *list, int level)
{
MonoTableInfo *t = &image->tables [MONO_TABLE_CLASSLAYOUT];
MonoTableInfo *tdef = &image->tables [MONO_TABLE_TYPEDEF];
guint32 cols [MONO_CLASS_LAYOUT_SIZE];
guint32 value, i;
if (level & MONO_VERIFY_ERROR) {
for (i = 0; i < t->rows; ++i) {
mono_metadata_decode_row (t, i, cols, MONO_CLASS_LAYOUT_SIZE);
if (cols [MONO_CLASS_LAYOUT_PARENT] > tdef->rows || !cols [MONO_CLASS_LAYOUT_PARENT]) {
ADD_ERROR (list, g_strdup_printf ("Parent in class layout is invalid in row %d", i + 1));
} else {
value = mono_metadata_decode_row_col (tdef, cols [MONO_CLASS_LAYOUT_PARENT] - 1, MONO_TYPEDEF_FLAGS);
if (value & TYPE_ATTRIBUTE_INTERFACE)
ADD_ERROR (list, g_strdup_printf ("Parent in class layout row %d is an interface", i + 1));
if (value & TYPE_ATTRIBUTE_AUTO_LAYOUT)
ADD_ERROR (list, g_strdup_printf ("Parent in class layout row %d is AutoLayout", i + 1));
if (value & TYPE_ATTRIBUTE_SEQUENTIAL_LAYOUT) {
switch (cols [MONO_CLASS_LAYOUT_PACKING_SIZE]) {
case 0: case 1: case 2: case 4: case 8: case 16:
case 32: case 64: case 128: break;
default:
ADD_ERROR (list, g_strdup_printf ("Packing size %d in class layout row %d is invalid", cols [MONO_CLASS_LAYOUT_PACKING_SIZE], i + 1));
}
} else if (value & TYPE_ATTRIBUTE_EXPLICIT_LAYOUT) {
/*
* FIXME: LAMESPEC: it claims it must be 0 (it's 1, instead).
if (cols [MONO_CLASS_LAYOUT_PACKING_SIZE])
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));
*/
}
/*
* FIXME: we need to check that if class size != 0,
* it needs to be greater than the class calculated size.
* If parent is a valuetype it also needs to be smaller than
* 1 MByte (0x100000 bytes).
* To do both these checks we need to load the referenced
* assemblies, though (the spec claims we didn't have to, bah).
*/
/*
* We need to check that the parent types have the samme layout
* type as well.
*/
}
}
}
return list;
}
static GSList*
verify_constant_table (MonoImage *image, GSList *list, int level)
{
MonoTableInfo *t = &image->tables [MONO_TABLE_CONSTANT];
guint32 cols [MONO_CONSTANT_SIZE];
guint32 value, i;
GHashTable *dups = g_hash_table_new (NULL, NULL);
for (i = 0; i < t->rows; ++i) {
mono_metadata_decode_row (t, i, cols, MONO_CONSTANT_SIZE);
if (level & MONO_VERIFY_ERROR)
if (g_hash_table_lookup (dups, GUINT_TO_POINTER (cols [MONO_CONSTANT_PARENT])))
ADD_ERROR (list, g_strdup_printf ("Parent 0x%08x is duplicated in Constant row %d", cols [MONO_CONSTANT_PARENT], i + 1));
g_hash_table_insert (dups, GUINT_TO_POINTER (cols [MONO_CONSTANT_PARENT]),
GUINT_TO_POINTER (cols [MONO_CONSTANT_PARENT]));
switch (cols [MONO_CONSTANT_TYPE]) {
case MONO_TYPE_U1: /* LAMESPEC: it says I1...*/
case MONO_TYPE_U2:
case MONO_TYPE_U4:
case MONO_TYPE_U8:
if (level & MONO_VERIFY_CLS)
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));
case MONO_TYPE_BOOLEAN:
case MONO_TYPE_CHAR:
case MONO_TYPE_I1:
case MONO_TYPE_I2:
case MONO_TYPE_I4:
case MONO_TYPE_I8:
case MONO_TYPE_R4:
case MONO_TYPE_R8:
case MONO_TYPE_STRING:
case MONO_TYPE_CLASS:
break;
default:
if (level & MONO_VERIFY_ERROR)
ADD_ERROR (list, g_strdup_printf ("Type 0x%x is invalid in Constant row %d", cols [MONO_CONSTANT_TYPE], i + 1));
}
if (level & MONO_VERIFY_ERROR) {
value = cols [MONO_CONSTANT_PARENT] >> MONO_HASCONSTANT_BITS;
switch (cols [MONO_CONSTANT_PARENT] & MONO_HASCONSTANT_MASK) {
case MONO_HASCONSTANT_FIEDDEF:
if (value > image->tables [MONO_TABLE_FIELD].rows)
ADD_ERROR (list, g_strdup_printf ("Parent (field) is invalid in Constant row %d", i + 1));
break;
case MONO_HASCONSTANT_PARAM:
if (value > image->tables [MONO_TABLE_PARAM].rows)
ADD_ERROR (list, g_strdup_printf ("Parent (param) is invalid in Constant row %d", i + 1));
break;
case MONO_HASCONSTANT_PROPERTY:
if (value > image->tables [MONO_TABLE_PROPERTY].rows)
ADD_ERROR (list, g_strdup_printf ("Parent (property) is invalid in Constant row %d", i + 1));
break;
default:
ADD_ERROR (list, g_strdup_printf ("Parent is invalid in Constant row %d", i + 1));
break;
}
}
if (level & MONO_VERIFY_CLS) {
/*
* FIXME: verify types is consistent with the enum type
* is parent is an enum.
*/
}
}
g_hash_table_destroy (dups);
return list;
}
static GSList*
verify_event_map_table (MonoImage *image, GSList *list, int level)
{
MonoTableInfo *t = &image->tables [MONO_TABLE_EVENTMAP];
guint32 cols [MONO_EVENT_MAP_SIZE];
guint32 i, last_event;
GHashTable *dups = g_hash_table_new (NULL, NULL);
last_event = 0;
for (i = 0; i < t->rows; ++i) {
mono_metadata_decode_row (t, i, cols, MONO_EVENT_MAP_SIZE);
if (level & MONO_VERIFY_ERROR)
if (g_hash_table_lookup (dups, GUINT_TO_POINTER (cols [MONO_EVENT_MAP_PARENT])))
ADD_ERROR (list, g_strdup_printf ("Parent 0x%08x is duplicated in Event Map row %d", cols [MONO_EVENT_MAP_PARENT], i + 1));
g_hash_table_insert (dups, GUINT_TO_POINTER (cols [MONO_EVENT_MAP_PARENT]),
GUINT_TO_POINTER (cols [MONO_EVENT_MAP_PARENT]));
if (level & MONO_VERIFY_ERROR) {
if (cols [MONO_EVENT_MAP_PARENT] > image->tables [MONO_TABLE_TYPEDEF].rows)
ADD_ERROR (list, g_strdup_printf ("Parent 0x%08x is invalid in Event Map row %d", cols [MONO_EVENT_MAP_PARENT], i + 1));
if (cols [MONO_EVENT_MAP_EVENTLIST] > image->tables [MONO_TABLE_EVENT].rows)
ADD_ERROR (list, g_strdup_printf ("EventList 0x%08x is invalid in Event Map row %d", cols [MONO_EVENT_MAP_EVENTLIST], i + 1));
if (cols [MONO_EVENT_MAP_EVENTLIST] <= last_event)
ADD_ERROR (list, g_strdup_printf ("EventList overlap in Event Map row %d", i + 1));
last_event = cols [MONO_EVENT_MAP_EVENTLIST];
}
}
g_hash_table_destroy (dups);
return list;
}
static GSList*
verify_event_table (MonoImage *image, GSList *list, int level)
{
MonoTableInfo *t = &image->tables [MONO_TABLE_EVENT];
guint32 cols [MONO_EVENT_SIZE];
const char *p;
guint32 value, i;
for (i = 0; i < t->rows; ++i) {
mono_metadata_decode_row (t, i, cols, MONO_EVENT_SIZE);
if (cols [MONO_EVENT_FLAGS] & ~(EVENT_SPECIALNAME|EVENT_RTSPECIALNAME)) {
if (level & MONO_VERIFY_ERROR)
ADD_ERROR (list, g_strdup_printf ("Flags 0x%04x invalid in Event row %d", cols [MONO_EVENT_FLAGS], i + 1));
}
if (!(p = is_valid_string (image, cols [MONO_EVENT_NAME], TRUE))) {
if (level & MONO_VERIFY_ERROR)
ADD_ERROR (list, g_strdup_printf ("Invalid name in Event row %d", i + 1));
} else {
if (level & MONO_VERIFY_CLS) {
if (!is_valid_cls_ident (p))
ADD_WARN (list, MONO_VERIFY_CLS, g_strdup_printf ("Invalid CLS name '%s` in Event row %d", p, i + 1));
}
}
if (level & MONO_VERIFY_ERROR && cols [MONO_EVENT_TYPE]) {
value = cols [MONO_EVENT_TYPE] >> MONO_TYPEDEFORREF_BITS;
switch (cols [MONO_EVENT_TYPE] & MONO_TYPEDEFORREF_MASK) {
case MONO_TYPEDEFORREF_TYPEDEF:
if (!value || value > image->tables [MONO_TABLE_TYPEDEF].rows)
ADD_ERROR (list, g_strdup_printf ("Type invalid in Event row %d", i + 1));
break;
case MONO_TYPEDEFORREF_TYPEREF:
if (!value || value > image->tables [MONO_TABLE_TYPEREF].rows)
ADD_ERROR (list, g_strdup_printf ("Type invalid in Event row %d", i + 1));
break;
case MONO_TYPEDEFORREF_TYPESPEC:
if (!value || value > image->tables [MONO_TABLE_TYPESPEC].rows)
ADD_ERROR (list, g_strdup_printf ("Type invalid in Event row %d", i + 1));
break;
default:
ADD_ERROR (list, g_strdup_printf ("Type invalid in Event row %d", i + 1));
}
}
/*
* FIXME: check that there is 1 add and remove row in methodsemantics
* and 0 or 1 raise and 0 or more other (maybe it's better to check for
* these while checking methodsemantics).
* check for duplicated names for the same type [ERROR]
* check for CLS duplicate names for the same type [CLS]
*/
}
return list;
}
static GSList*
verify_field_table (MonoImage *image, GSList *list, int level)
{
MonoTableInfo *t = &image->tables [MONO_TABLE_FIELD];
guint32 cols [MONO_FIELD_SIZE];
const char *p;
guint32 i, flags;
for (i = 0; i < t->rows; ++i) {
mono_metadata_decode_row (t, i, cols, MONO_FIELD_SIZE);
/*
* Check this field has only one owner and that the owner is not
* an interface (done in verify_typedef_table() )
*/
flags = cols [MONO_FIELD_FLAGS];
switch (flags & FIELD_ATTRIBUTE_FIELD_ACCESS_MASK) {
case FIELD_ATTRIBUTE_COMPILER_CONTROLLED:
case FIELD_ATTRIBUTE_PRIVATE:
case FIELD_ATTRIBUTE_FAM_AND_ASSEM:
case FIELD_ATTRIBUTE_ASSEMBLY:
case FIELD_ATTRIBUTE_FAMILY:
case FIELD_ATTRIBUTE_FAM_OR_ASSEM:
case FIELD_ATTRIBUTE_PUBLIC:
break;
default:
if (level & MONO_VERIFY_ERROR)
ADD_ERROR (list, g_strdup_printf ("Invalid access mask in Field row %d", i + 1));
break;
}
if (level & MONO_VERIFY_ERROR) {
if ((flags & FIELD_ATTRIBUTE_LITERAL) && (flags & FIELD_ATTRIBUTE_INIT_ONLY))
ADD_ERROR (list, g_strdup_printf ("Literal and InitOnly cannot be both set in Field row %d", i + 1));
if ((flags & FIELD_ATTRIBUTE_LITERAL) && !(flags & FIELD_ATTRIBUTE_STATIC))
ADD_ERROR (list, g_strdup_printf ("Literal needs also Static set in Field row %d", i + 1));
if ((flags & FIELD_ATTRIBUTE_RT_SPECIAL_NAME) && !(flags & FIELD_ATTRIBUTE_SPECIAL_NAME))
ADD_ERROR (list, g_strdup_printf ("RTSpecialName needs also SpecialName set in Field row %d", i + 1));
/*
* FIXME: check there is only ono owner in the respective table.
* if (flags & FIELD_ATTRIBUTE_HAS_FIELD_MARSHAL)
* if (flags & FIELD_ATTRIBUTE_HAS_DEFAULT)
* if (flags & FIELD_ATTRIBUTE_HAS_FIELD_RVA)
*/
}
if (!(p = is_valid_string (image, cols [MONO_FIELD_NAME], TRUE))) {
if (level & MONO_VERIFY_ERROR)
ADD_ERROR (list, g_strdup_printf ("Invalid name in Field row %d", i + 1));
} else {
if (level & MONO_VERIFY_CLS) {
if (!is_valid_cls_ident (p))
ADD_WARN (list, MONO_VERIFY_CLS, g_strdup_printf ("Invalid CLS name '%s` in Field row %d", p, i + 1));
}
}
/*
* check signature.
* if owner is module needs to be static, access mask needs to be compilercontrolled,
* public or private (not allowed in cls mode).
* if owner is an enum ...
*/
}
return list;
}
static GSList*
verify_file_table (MonoImage *image, GSList *list, int level)
{
MonoTableInfo *t = &image->tables [MONO_TABLE_FILE];
guint32 cols [MONO_FILE_SIZE];
const char *p;
guint32 i;
GHashTable *dups = g_hash_table_new (g_str_hash, g_str_equal);
for (i = 0; i < t->rows; ++i) {
mono_metadata_decode_row (t, i, cols, MONO_FILE_SIZE);
if (level & MONO_VERIFY_ERROR) {
if (cols [MONO_FILE_FLAGS] != FILE_CONTAINS_METADATA && cols [MONO_FILE_FLAGS] != FILE_CONTAINS_NO_METADATA)
ADD_ERROR (list, g_strdup_printf ("Invalid flags in File row %d", i + 1));
if (!is_valid_blob (image, cols [MONO_FILE_HASH_VALUE], TRUE))
ADD_ERROR (list, g_strdup_printf ("File hash value in row %d is invalid or not null and empty", i + 1));
}
if (!(p = is_valid_string (image, cols [MONO_FILE_NAME], TRUE))) {
if (level & MONO_VERIFY_ERROR)
ADD_ERROR (list, g_strdup_printf ("Invalid name in File row %d", i + 1));
} else {
if (level & MONO_VERIFY_ERROR) {
if (!is_valid_filename (p))
ADD_ERROR (list, g_strdup_printf ("Invalid name '%s` in File row %d", p, i + 1));
else if (g_hash_table_lookup (dups, p)) {
ADD_ERROR (list, g_strdup_printf ("Duplicate name '%s` in File row %d", p, i + 1));
}
g_hash_table_insert (dups, (gpointer)p, (gpointer)p);
}
}
/*
* FIXME: I don't understand what this means:
* If this module contains a row in the Assembly table (that is, if this module "holds the manifest")
* then there shall not be any row in the File table for this module - i.e., no self-reference [ERROR]
*/
}
if (level & MONO_VERIFY_WARNING) {
if (!t->rows && image->tables [MONO_TABLE_EXPORTEDTYPE].rows)
ADD_WARN (list, MONO_VERIFY_WARNING, g_strdup ("ExportedType table should be empty if File table is empty"));
}
g_hash_table_destroy (dups);
return list;
}
static GSList*
verify_moduleref_table (MonoImage *image, GSList *list, int level)
{
MonoTableInfo *t = &image->tables [MONO_TABLE_MODULEREF];
MonoTableInfo *tfile = &image->tables [MONO_TABLE_FILE];
guint32 cols [MONO_MODULEREF_SIZE];
const char *p, *pf;
guint32 found, i, j, value;
GHashTable *dups = g_hash_table_new (g_str_hash, g_str_equal);
for (i = 0; i < t->rows; ++i) {
mono_metadata_decode_row (t, i, cols, MONO_MODULEREF_SIZE);
if (!(p = is_valid_string (image, cols [MONO_MODULEREF_NAME], TRUE))) {
if (level & MONO_VERIFY_ERROR)
ADD_ERROR (list, g_strdup_printf ("Invalid name in ModuleRef row %d", i + 1));
} else {
if (level & MONO_VERIFY_ERROR) {
if (!is_valid_filename (p))
ADD_ERROR (list, g_strdup_printf ("Invalid name '%s` in ModuleRef row %d", p, i + 1));
else if (g_hash_table_lookup (dups, p)) {
ADD_WARN (list, MONO_VERIFY_WARNING, g_strdup_printf ("Duplicate name '%s` in ModuleRef row %d", p, i + 1));
g_hash_table_insert (dups, (gpointer)p, (gpointer)p);
found = 0;
for (j = 0; j < tfile->rows; ++j) {
value = mono_metadata_decode_row_col (tfile, j, MONO_FILE_NAME);
if ((pf = is_valid_string (image, value, TRUE)))
if (strcmp (p, pf) == 0) {
found = 1;
break;
}
}
if (!found)
ADD_ERROR (list, g_strdup_printf ("Name '%s` in ModuleRef row %d doesn't have a match in File table", p, i + 1));
}
}
}
}
g_hash_table_destroy (dups);
return list;
}
static GSList*
verify_standalonesig_table (MonoImage *image, GSList *list, int level)
{
MonoTableInfo *t = &image->tables [MONO_TABLE_STANDALONESIG];
guint32 cols [MONO_STAND_ALONE_SIGNATURE_SIZE];
const char *p;
guint32 i;
for (i = 0; i < t->rows; ++i) {
mono_metadata_decode_row (t, i, cols, MONO_STAND_ALONE_SIGNATURE_SIZE);
if (level & MONO_VERIFY_ERROR) {
if (!is_valid_blob (image, cols [MONO_STAND_ALONE_SIGNATURE], TRUE)) {
ADD_ERROR (list, g_strdup_printf ("Signature is invalid in StandAloneSig row %d", i + 1));
} else {
p = mono_metadata_blob_heap (image, cols [MONO_STAND_ALONE_SIGNATURE]);
/* FIXME: check it's a valid locals or method sig.*/
}
}
}
return list;
}
GSList*
mono_image_verify_tables (MonoImage *image, int level)
{
GSList *error_list = NULL;
error_list = verify_assembly_table (image, error_list, level);
/*
* AssemblyOS, AssemblyProcessor, AssemblyRefOs and
* AssemblyRefProcessor should be ignored,
* though we may want to emit a warning, since it should not
* be present in a PE file.
*/
error_list = verify_assemblyref_table (image, error_list, level);
error_list = verify_class_layout_table (image, error_list, level);
error_list = verify_constant_table (image, error_list, level);
/*
* cutom attribute, declsecurity
*/
error_list = verify_event_map_table (image, error_list, level);
error_list = verify_event_table (image, error_list, level);
error_list = verify_field_table (image, error_list, level);
error_list = verify_file_table (image, error_list, level);
error_list = verify_moduleref_table (image, error_list, level);
error_list = verify_standalonesig_table (image, error_list, level);
return g_slist_reverse (error_list);
}
enum {
TYPE_INV = 0, /* leave at 0. */
TYPE_I4 = 1,
TYPE_I8 = 2,
TYPE_PTR = 3,
TYPE_R8 = 4,
TYPE_MP = 5,
TYPE_OBJ = 6,
TYPE_VT = 7,
TYPE_MAX = 8
};
static const char* const
arg_name [TYPE_MAX] = {
"Invalid",
"Int32",
"Int64",
"IntPtr",
"Double",
"Managed Pointer",
"ObjRef",
"ValueType"
};
static const char
bin_num_table [TYPE_MAX] [TYPE_MAX] = {
{TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_I4, TYPE_INV, TYPE_PTR, TYPE_INV, TYPE_MP, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_PTR, TYPE_INV, TYPE_PTR, TYPE_INV, TYPE_MP, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_R8, TYPE_INV, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_MP, TYPE_INV, TYPE_MP, TYPE_INV, TYPE_PTR, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV}
};
static const char
neg_table [] = {
TYPE_INV, TYPE_I4, TYPE_I8, TYPE_PTR, TYPE_R8, TYPE_INV, TYPE_INV, TYPE_INV
};
/* reduce the size of this table */
static const char
bin_int_table [TYPE_MAX] [TYPE_MAX] = {
{TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_I4, TYPE_INV, TYPE_PTR, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_PTR, TYPE_INV, TYPE_PTR, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV}
};
static const char
bin_comp_table [TYPE_MAX] [TYPE_MAX] = {
{0},
{0, 1, 0, 1, 0, 0, 0, 0},
{0, 0, 1, 0, 0, 0, 0, 0},
{0, 1, 0, 1, 0, 2, 0, 0},
{0, 0, 0, 0, 1, 0, 0, 0},
{0, 0, 0, 2, 0, 1, 0, 0},
{0, 0, 0, 0, 0, 0, 3, 0},
{0, 0, 0, 0, 0, 0, 0, 0},
};
/* reduce the size of this table */
static const char
shift_table [TYPE_MAX] [TYPE_MAX] = {
{TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_I4, TYPE_INV, TYPE_I4, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_I8, TYPE_INV, TYPE_I8, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_PTR, TYPE_INV, TYPE_PTR, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV},
{TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV, TYPE_INV}
};
static const char
ldind_type [] = {
TYPE_I4, TYPE_I4, TYPE_I4, TYPE_I4, TYPE_I4, TYPE_I4, TYPE_I8, TYPE_PTR, TYPE_R8, TYPE_R8, TYPE_OBJ
};
static const char
ldelem_type [] = {
TYPE_I4, TYPE_I4, TYPE_I4, TYPE_I4, TYPE_I4, TYPE_I4, TYPE_I8, TYPE_PTR, TYPE_R8, TYPE_R8, TYPE_OBJ
};
#define ADD_INVALID(list,msg) \
do { \
MonoVerifyInfo *vinfo = g_new (MonoVerifyInfo, 1); \
vinfo->status = MONO_VERIFY_ERROR; \
vinfo->message = (msg); \
(list) = g_slist_prepend ((list), vinfo); \
/*G_BREAKPOINT ();*/ \
goto invalid_cil; \
} while (0)
#define CHECK_STACK_UNDERFLOW(num) \
do { \
if (cur_stack < (num)) \
ADD_INVALID (list, g_strdup_printf ("Stack underflow at 0x%04x (%d items instead of %d)", ip_offset, cur_stack, (num))); \
} while (0)
#define CHECK_STACK_OVERFLOW() \
do { \
if (cur_stack >= max_stack) \
ADD_INVALID (list, g_strdup_printf ("Maxstack exceeded at 0x%04x", ip_offset)); \
} while (0)
enum {
PREFIX_UNALIGNED = 1,
PREFIX_VOLATILE = 2,
PREFIX_TAIL = 4,
PREFIX_ADDR_MASK = 3,
PREFIX_FUNC_MASK = 4
};
enum {
CODE_SEEN = 1
};
typedef struct {
MonoType *type;
int stype;
} ILStackDesc;
typedef struct {
ILStackDesc *stack;
guint16 stack_count;
guint16 flags;
} ILCodeDesc;
static void
type_to_eval_stack_type (MonoType *type, ILStackDesc *stack, int take_addr) {
int t = type->type;
stack->type = type;
if (type->byref || take_addr) { /* fix double addr issue */
stack->stype = TYPE_MP;
return;
}
handle_enum:
switch (t) {
case MONO_TYPE_I1:
case MONO_TYPE_U1:
case MONO_TYPE_BOOLEAN:
case MONO_TYPE_I2:
case MONO_TYPE_U2:
case MONO_TYPE_CHAR:
case MONO_TYPE_I4:
case MONO_TYPE_U4:
stack->stype = TYPE_I4;
return;
case MONO_TYPE_I:
case MONO_TYPE_U:
case MONO_TYPE_PTR:
stack->stype = TYPE_PTR;
return;
case MONO_TYPE_CLASS:
case MONO_TYPE_STRING:
case MONO_TYPE_OBJECT:
case MONO_TYPE_SZARRAY:
case MONO_TYPE_ARRAY:
stack->stype = TYPE_OBJ;
return;
case MONO_TYPE_I8:
case MONO_TYPE_U8:
stack->stype = TYPE_I8;
return;
case MONO_TYPE_R4:
case MONO_TYPE_R8:
stack->stype = TYPE_R8;
return;
case MONO_TYPE_VALUETYPE:
if (type->data.klass->enumtype) {
t = type->data.klass->enum_basetype->type;
goto handle_enum;
} else {
stack->stype = TYPE_VT;
return;
}
default:
g_error ("unknown type %02x in eval stack type", type->type);
}
return;
}
static int
type_from_op (int ins, ILStackDesc *arg) {
switch (ins) {
/* binops */
case CEE_ADD:
case CEE_SUB:
case CEE_MUL:
case CEE_DIV:
case CEE_REM:
/* FIXME: check unverifiable args for TYPE_MP */
return arg->stype = bin_num_table [arg->stype] [arg [1].stype];
case CEE_DIV_UN:
case CEE_REM_UN:
case CEE_AND:
case CEE_OR:
case CEE_XOR:
return arg->stype = bin_int_table [arg->stype] [arg [1].stype];
case CEE_SHL:
case CEE_SHR:
case CEE_SHR_UN:
return arg->stype = shift_table [arg->stype] [arg [1].stype];
case CEE_BEQ_S:
case CEE_BGE_S:
case CEE_BGT_S:
case CEE_BLE_S:
case CEE_BLT_S:
case CEE_BNE_UN_S:
case CEE_BGE_UN_S:
case CEE_BGT_UN_S:
case CEE_BLE_UN_S:
case CEE_BLT_UN_S:
case CEE_BEQ:
case CEE_BGE:
case CEE_BGT:
case CEE_BLE:
case CEE_BLT:
case CEE_BNE_UN:
case CEE_BGE_UN:
case CEE_BGT_UN:
case CEE_BLE_UN:
case CEE_BLT_UN:
/* FIXME: handle some specifics with ins->next->type */
return bin_comp_table [arg->stype] [arg [1].stype] ? TYPE_I4: TYPE_INV;
case 256+CEE_CEQ:
case 256+CEE_CGT:
case 256+CEE_CGT_UN:
case 256+CEE_CLT:
case 256+CEE_CLT_UN:
return arg->stype = bin_comp_table [arg->stype] [arg [1].stype] ? TYPE_I4: TYPE_INV;
/* unops */
case CEE_NEG:
return arg->stype = neg_table [arg->stype];
case CEE_NOT:
if (arg->stype >= TYPE_I4 && arg->stype <= TYPE_PTR)
return arg->stype;
else
return arg->stype = TYPE_INV;
case CEE_CONV_I1:
case CEE_CONV_U1:
case CEE_CONV_I2:
case CEE_CONV_U2:
case CEE_CONV_I4:
case CEE_CONV_U4:
case CEE_CONV_OVF_I1:
case CEE_CONV_OVF_U1:
case CEE_CONV_OVF_I2:
case CEE_CONV_OVF_U2:
case CEE_CONV_OVF_I4:
case CEE_CONV_OVF_U4:
case CEE_CONV_OVF_I1_UN:
case CEE_CONV_OVF_U1_UN:
case CEE_CONV_OVF_I2_UN:
case CEE_CONV_OVF_U2_UN:
case CEE_CONV_OVF_I4_UN:
case CEE_CONV_OVF_U4_UN:
if (arg->stype == TYPE_INV || arg->stype >= TYPE_MP)
return arg->stype = TYPE_INV;
return arg->stype = TYPE_I4;
case CEE_CONV_I:
case CEE_CONV_U:
case CEE_CONV_OVF_I:
case CEE_CONV_OVF_U:
case CEE_CONV_OVF_I_UN:
case CEE_CONV_OVF_U_UN:
if (arg->stype == TYPE_INV || arg->stype == TYPE_VT)
return arg->stype = TYPE_INV;
return arg->stype = TYPE_PTR;
case CEE_CONV_I8:
case CEE_CONV_U8:
case CEE_CONV_OVF_I8:
case CEE_CONV_OVF_U8:
case CEE_CONV_OVF_I8_UN:
case CEE_CONV_OVF_U8_UN:
return arg->stype = TYPE_I8;
case CEE_CONV_R4:
case CEE_CONV_R8:
return arg->stype = TYPE_R8;
default:
g_error ("opcode 0x%04x not handled in type from op", ins);
break;
}
return FALSE;
}
static int
in_any_block (MonoMethodHeader *header, guint offset)
{
int i;
MonoExceptionClause *clause;
for (i = 0; i < header->num_clauses; ++i) {
clause = &header->clauses [i];
if (MONO_OFFSET_IN_CLAUSE (clause, offset))
return 1;
if (MONO_OFFSET_IN_HANDLER (clause, offset))
return 1;
/* need to check filter ... */
}
return 0;
}
static int
in_same_block (MonoMethodHeader *header, guint offset, guint target)
{
int i;
MonoExceptionClause *clause;
for (i = 0; i < header->num_clauses; ++i) {
clause = &header->clauses [i];
if (MONO_OFFSET_IN_CLAUSE (clause, offset) && !MONO_OFFSET_IN_CLAUSE (clause, target))
return 0;
if (MONO_OFFSET_IN_HANDLER (clause, offset) && !MONO_OFFSET_IN_HANDLER (clause, target))
return 0;
/* need to check filter ... */