mono/dis/declsec.c

   1 /*
   2  * declsec.h:  Support for the new declarative security attribute
   3  *      metadata format (2.0)
   4  *
   5  * Author:
   6  *      Sebastien Pouliot  <sebastien@ximian.com>
   7  *
   8  * Copyright (C) 2005 Novell, Inc (http://www.novell.com)
   9  */
  10
  11 #include <glib.h>
  12 #include <math.h>
  13
  14 #include "mono/metadata/blob.h"
  15 #include "mono/metadata/metadata.h"
  16 #include "mono/metadata/mono-endian.h"
  17 #include "mono/utils/mono-compiler.h"
  18
  19 #include "declsec.h"
  20
  21 static char*
  22 declsec_20_get_classname (const char* p, const char **rptr)
  23 {
  24         int apos, cpos = 0;
  25         char *c;
  26         char *a;
  27         char *result;
  28         GString *res = g_string_new ("");
  29         int len = mono_metadata_decode_value (p, &p);
  30
  31         c = (char *) p;
  32         while ((*c++ != ',') && (cpos++ < len));
  33         c++;
  34
  35         apos = cpos;
  36         a = c;
  37         while ((*a++ != ',') && (apos++ < len));
  38
  39         if (apos - cpos > 1) {
  40                 g_string_sprintfa (res, "[%.*s]%.*s", apos - cpos, c, cpos, p);
  41         } else {
  42                 /* in-assembly type aren't fully qualified (no comma) */
  43                 g_string_sprintfa (res, "%.*s", cpos - 1, p);
  44         }
  45
  46         p += len;
  47         if (rptr)
  48                 *rptr = p;
  49
  50         result = res->str;
  51         g_string_free (res, FALSE);
  52         return result;
  53 }
  54
  55 static gboolean
  56 declsec_20_write_type (GString *str, char type)
  57 {
  58         switch (type) {
  59         case MONO_TYPE_BOOLEAN:
  60                 g_string_append (str, "bool");
  61                 break;
  62         case MONO_TYPE_SZARRAY:
  63                 g_string_append (str, "[]");
  64                 break;
  65         case MONO_TYPE_SYSTEM_TYPE:
  66                 g_string_append (str, "type");
  67                 break;
  68         case MONO_TYPE_STRING:
  69                 g_string_append (str, "string");
  70                 break;
  71         default:
  72                 g_warning ("TODO type %d - please fill a bug report on this!", type);
  73                 return FALSE;
  74         }
  75         return TRUE;
  76 }
  77
  78 static const char*
  79 declsec_20_write_value (GString *str, char type, const char *value)
  80 {
  81         switch (type) {
  82         case MONO_TYPE_U1:
  83                 g_string_sprintfa (str, "%d", (unsigned char)*value);
  84                 return value + 1;
  85         case MONO_TYPE_I1:
  86                 g_string_sprintfa (str, "%d", *value);
  87                 return value + 1;
  88         case MONO_TYPE_BOOLEAN:
  89                 g_string_sprintfa (str, "%s", *value ? "true" : "false");
  90                 return value + 1;
  91         case MONO_TYPE_CHAR:
  92                 g_string_sprintfa (str, "0x%04X", read16 (value));
  93                 return value + 2;
  94         case MONO_TYPE_U2:
  95                 g_string_sprintfa (str, "%d", read16 (value));
  96                 return value + 2;
  97         case MONO_TYPE_I2:
  98                 g_string_sprintfa (str, "%d", (gint16)read16 (value));
  99                 return value + 2;
 100         case MONO_TYPE_U4:
 101                 g_string_sprintfa (str, "%d", read32 (value));
 102                 return value + 4;
 103         case MONO_TYPE_I4:
 104                 g_string_sprintfa (str, "%d", (gint32)read32 (value));
 105                 return value + 4;
 106         case MONO_TYPE_U8:
 107                 g_string_sprintfa (str, "%lld", (long long)read64 (value));
 108                 return value + 8;
 109         case MONO_TYPE_I8:
 110                 g_string_sprintfa (str, "%lld", (long long)read64 (value));
 111                 return value + 8;
 112         case MONO_TYPE_R4: {
 113                 float val;
 114                 int inf;
 115                 readr4 (value, &val);
 116                 inf = isinf (val);
 117                 if (inf == -1)
 118                         g_string_sprintfa (str, "0xFF800000"); /* negative infinity */
 119                 else if (inf == 1)
 120                         g_string_sprintfa (str, "0x7F800000"); /* positive infinity */
 121                 else if (isnan (val))
 122                         g_string_sprintfa (str, "0xFFC00000"); /* NaN */
 123                 else
 124                         g_string_sprintfa (str, "%.8g", val);
 125                 return value + 4;
 126         }
 127         case MONO_TYPE_R8: {
 128                 double val;
 129                 int inf;
 130                 readr8 (value, &val);
 131                 inf = isinf (val);
 132                 if (inf == -1)
 133                         g_string_sprintfa (str, "0xFFF00000000000000"); /* negative infinity */
 134                 else if (inf == 1)
 135                         g_string_sprintfa (str, "0x7FFF0000000000000"); /* positive infinity */
 136                 else if (isnan (val))
 137                         g_string_sprintfa (str, "0xFFF80000000000000"); /* NaN */
 138                 else
 139                         g_string_sprintfa (str, "%.17g", val);
 140                 return value + 8;
 141         }
 142         case MONO_TYPE_STRING:
 143                 if (*value == (char)0xff) {
 144                         g_string_append (str, "nullref");
 145                         return value + 1;
 146                 } else {
 147                         int len = mono_metadata_decode_value (value, &value);
 148                         g_string_sprintfa (str, "'%.*s'", len, value);
 149                         return value + len;
 150                 }
 151         case MONO_TYPE_SYSTEM_TYPE: {
 152                 char *cname = declsec_20_get_classname (value, NULL);
 153                 int len = mono_metadata_decode_value (value, &value);
 154                 g_string_append (str, cname);
 155                 g_free (cname);
 156                 return value + len;
 157         }
 158         }
 159         return 0;
 160 }
 161
 162 char*
 163 dump_declsec_entry20 (MonoImage *m, const char* p, const char *indent)
 164 {
 165         int i, num;
 166         char *result;
 167         GString *res = g_string_new ("");
 168
 169         if (*p++ != MONO_DECLSEC_FORMAT_20)
 170                 return NULL;
 171
 172         g_string_append (res, "{");
 173
 174         /* number of encoded permission attributes */
 175         num = mono_metadata_decode_value (p, &p);
 176
 177         for (i = 0; i < num; i++) {
 178                 int len, j, pos = 0, param_len;
 179                 char *param_start;
 180                 char *s = declsec_20_get_classname (p, &p);
 181                 g_string_sprintfa (res, "%s = {", s);
 182                 g_free (s);
 183
 184                 /* optional parameters length */
 185                 param_len = mono_metadata_decode_value (p, &p);
 186                 param_start = (char *) p;
 187
 188                 /* number of parameters */
 189                 pos = mono_metadata_decode_value (p, &p);
 190                 for (j = 0; j < pos; j++) {
 191                         int k, elem;
 192                         int type = *p++;
 193
 194                         switch (type) {
 195                         case MONO_DECLSEC_FIELD:
 196                                 /* not sure if/how we can get this in a declarative security attribute... */
 197                                 g_string_append (res, "field ");
 198                                 break;
 199                         case MONO_DECLSEC_PROPERTY:
 200                                 g_string_append (res, "property ");
 201                                 break;
 202                         default:
 203                                 g_warning ("TODO %d - please fill a bug report on this!", type);
 204                                 break;
 205                         }
 206
 207                         type = *p++;
 208
 209                         if (type == MONO_DECLSEC_ENUM) {
 210                                 s = declsec_20_get_classname (p, &p);
 211                                 len = mono_metadata_decode_value (p, &p);
 212                                 g_string_sprintfa (res, "enum %s '%.*s' = ", s, len, p);
 213                                 g_free (s);
 214                                 p += len;
 215                                 /* TODO: we must detect the size of the enum element (from the type ? length ?)
 216                                  * note: ildasm v2 has some problem decoding them too and doesn't
 217                                  * seems to rely on the type (as the other assembly isn't loaded) */
 218                                 g_string_sprintfa (res, "int32(%d)", read32 (p));
 219                                 p += 4;
 220                         } else {
 221                                 int arraytype = 0;
 222                                 if (type == MONO_TYPE_SZARRAY) {
 223                                         arraytype = *p++;
 224                                         declsec_20_write_type (res, arraytype);
 225                                 }
 226                                 declsec_20_write_type (res, type);
 227
 228                                 len = mono_metadata_decode_value (p, &p);
 229                                 g_string_sprintfa (res, " '%.*s' = ", len, p);
 230                                 p += len;
 231
 232                                 if (type == MONO_TYPE_SZARRAY) {
 233                                         type = arraytype;
 234                                         declsec_20_write_type (res, type);
 235                                         elem = read32 (p);
 236                                         p += 4;
 237                                         g_string_sprintfa (res, "[%d]", elem);
 238                                 } else {
 239                                         declsec_20_write_type (res, type);
 240                                         elem = 1;
 241                                 }
 242                                 g_string_append (res, "(");
 243
 244                                 /* write value - or each element in the array */
 245                                 for (k = 0; k < elem; k++) {
 246                                         p = declsec_20_write_value (res, type, p);
 247                                         /* separate array elements */
 248                                         if (k < elem - 1)
 249                                                 g_string_append (res, " ");
 250                                 }
 251
 252                                 if (j < pos - 1)
 253                                         g_string_sprintfa (res, ")\n%s", indent);
 254                                 else
 255                                         g_string_append (res, ")");
 256                         }
 257
 258                 }
 259
 260                 if (i < num - 1)
 261                         g_string_sprintfa (res, "},\n%s", indent);
 262                 else
 263                         g_string_append (res, "}");
 264
 265                 if (param_len > 0)
 266                         p = param_start + param_len;
 267         }
 268         g_string_append (res, "}");
 269
 270         result = res->str;
 271         g_string_free (res, FALSE);
 272         return result;
 273 }