FileTraverser Demo added
Proper handling of symlinks in java apps
committer: Markus Bröker <mbroeker@largo.homelinux.org>
/**
* jdisa
*
* ByteCode Disassembler
* See http://java.sun.com/docs/books/jvms/second_edition/html/VMSpecTOC.doc.html
*/
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#define BUF_SIZE 1023
typedef unsigned char uchar_t;
typedef uchar_t u1[1];
typedef uchar_t u2[2];
typedef uchar_t u4[4];
typedef uchar_t u8[8];
struct Header {
u4 magic;
u2 minor_version;
u2 major_version;
u2 constant_pool_count;
};
typedef struct Header Header;
int main (int argc, char **argv)
{
FILE *f;
uchar_t buffer[BUF_SIZE];
int i;
size_t num;
int OPCODE;
Header *cf;
if (argc != 2) {
fprintf (stderr, "Usage: %s <FILE>\n", argv[0]);
return EXIT_FAILURE;
}
if ((f = fopen (argv[1], "r")) == NULL) {
perror ("FOPEN");
return EXIT_FAILURE;
}
if ((cf = malloc (sizeof (Header))) == NULL)
return EXIT_FAILURE;
if ((num = fread (cf, 1, sizeof (Header), f)) < 1)
return EXIT_FAILURE;
printf (" MAGIC: %2X%2X%2X%2X\n", cf->magic[0], cf->magic[1], cf->magic[2], cf->magic[3]);
printf ("VERSION: %02d.%02d\n", cf->major_version[1], cf->major_version[0]);
printf ("POOLCTN: %2d:%2d\n", cf->constant_pool_count[1], cf->constant_pool_count[0]);
if (cf != NULL)
free (cf);
OPCODE = 1;
while (!feof (f)) {
num = fread (buffer, 1, sizeof (buffer), f);
for (i = 0; i < num; i++) {
if (OPCODE) {
switch (buffer[i]) {
case 50:
printf ("aaload ");
break;
case 83:
printf ("aastore ");
break;
case 1:
printf ("aconst_null ");
break;
case 25:
printf ("aload ");
break;
case 42:
printf ("aload_0 ");
break;
case 43:
printf ("aload_1 ");
break;
case 44:
printf ("aload_2 ");
break;
case 45:
printf ("aload_3 ");
break;
case 189:
printf ("anewarray ");
break;
case 176:
printf ("areturn ");
break;
case 190:
printf ("arraylength ");
break;
case 58:
printf ("astore ");
break;
case 75:
printf ("astore_0 ");
break;
case 76:
printf ("astore_1 ");
break;
case 77:
printf ("astore_2 ");
break;
case 78:
printf ("astore_3 ");
break;
case 191:
printf ("athrow ");
break;
case 51:
printf ("baload ");
break;
case 84:
printf ("bastore ");
break;
case 16:
printf ("bipush ");
break;
case 52:
printf ("caload ");
break;
case 85:
printf ("castore ");
break;
case 192:
printf ("checkcast ");
break;
case 144:
printf ("d2f ");
break;
case 142:
printf ("d2i ");
break;
case 143:
printf ("d2l ");
break;
case 99:
printf ("dadd ");
break;
case 49:
printf ("daload ");
break;
case 82:
printf ("dastore ");
break;
case 152:
printf ("dcmp ");
break;
case 14:
printf ("dconst_0 ");
break;
case 15:
printf ("dconst_1 ");
break;
case 111:
printf ("ddiv ");
break;
case 24:
printf ("dload ");
break;
case 38:
printf ("dload_0 ");
break;
case 39:
printf ("dload_1 ");
break;
case 40:
printf ("dload_2 ");
break;
case 41:
printf ("dload_3 ");
break;
case 107:
printf ("dmul ");
break;
case 119:
printf ("dneg ");
break;
case 115:
printf ("drem ");
break;
case 175:
printf ("dreturn ");
break;
case 57:
printf ("dstore ");
break;
case 71:
printf ("dstore_0 ");
break;
case 72:
printf ("dstore_1 ");
break;
case 73:
printf ("dstore_2 ");
break;
case 74:
printf ("dstore_3 ");
break;
case 103:
printf ("dsub ");
break;
case 89:
printf ("dup ");
break;
case 90:
printf ("dup_x1 ");
break;
case 91:
printf ("dup_x2 ");
break;
case 92:
printf ("dup2 ");
break;
case 93:
printf ("dup2_x1 ");
break;
case 94:
printf ("dup2_x2 ");
break;
case 141:
printf ("f2d ");
break;
case 139:
printf ("f2i ");
break;
case 140:
printf ("f2l ");
break;
case 98:
printf ("fadd ");
break;
case 48:
printf ("faload ");
break;
case 81:
printf ("fastore ");
break;
case 150:
printf ("fcmpg ");
break;
case 149:
printf ("fcmpl ");
break;
case 11:
printf ("fconst_0 ");
break;
case 12:
printf ("fconst_1 ");
break;
case 13:
printf ("fconst_2 ");
break;
case 110:
printf ("fdiv ");
break;
case 23:
printf ("fload ");
break;
case 34:
printf ("fload_0 ");
break;
case 35:
printf ("fload_1 ");
break;
case 36:
printf ("fload_2 ");
break;
case 37:
printf ("fload_3 ");
break;
case 106:
printf ("fmul ");
break;
case 118:
printf ("fneg ");
break;
case 114:
printf ("frem ");
break;
case 174:
printf ("freturn ");
break;
case 56:
printf ("fstore ");
break;
case 67:
printf ("fstore_0 ");
break;
case 68:
printf ("fstore_1 ");
break;
case 69:
printf ("fstore_2 ");
break;
case 70:
printf ("fstore_3 ");
break;
case 102:
printf ("fsub ");
break;
case 180:
printf ("getfield ");
break;
case 178:
printf ("getstatic ");
break;
case 167:
printf ("goto ");
break;
case 200:
printf ("goto_w ");
break;
case 145:
printf ("i2b ");
break;
case 146:
printf ("i2c ");
break;
case 135:
printf ("i2d ");
break;
case 134:
printf ("i2f ");
break;
case 133:
printf ("i2l ");
break;
case 147:
printf ("i2s ");
break;
case 96:
printf ("iadd ");
break;
case 46:
printf ("iaload ");
break;
case 126:
printf ("iand ");
break;
case 79:
printf ("iastore ");
break;
case 2:
printf ("iconst_m1 ");
break;
case 3:
printf ("iconst_0 ");
break;
case 4:
printf ("iconst_1 ");
break;
case 5:
printf ("iconst_2 ");
break;
case 6:
printf ("iconst_3 ");
break;
case 7:
printf ("iconst_4 ");
break;
case 8:
printf ("iconst_5 ");
break;
case 108:
printf ("idiv ");
break;
case 165:
printf ("if_acmpeq ");
break;
case 166:
printf ("if_acmpne ");
break;
case 159:
printf ("if_icmpeq ");
break;
case 160:
printf ("if_icmpne ");
break;
case 161:
printf ("if_icmplt ");
break;
case 162:
printf ("if_icmpge ");
break;
case 163:
printf ("if_icmpgt ");
break;
case 164:
printf ("if_icmple ");
break;
case 153:
printf ("ifeq ");
break;
case 154:
printf ("ifne ");
break;
case 155:
printf ("iflt ");
break;
case 156:
printf ("ifge ");
break;
case 157:
printf ("ifgt ");
break;
case 158:
printf ("ifle ");
break;
case 199:
printf ("ifnonnull ");
break;
case 198:
printf ("ifnull ");
break;
case 132:
printf ("iinc %d %d\n", buffer[i + 1], buffer[i + 2]);
i += 2;
continue;
break;
case 21:
printf ("iload ");
break;
case 26:
printf ("iload_0 ");
break;
case 27:
printf ("iload_1 ");
break;
case 28:
printf ("iload_2 ");
break;
case 29:
printf ("iload_3 ");
break;
case 104:
printf ("imul ");
break;
case 116:
printf ("ineg ");
break;
case 193:
printf ("instanceof ");
break;
case 185:
printf ("invokeinterface ");
break;
case 183:
printf ("invokespecial ");
break;
case 184:
printf ("invokestatic ");
break;
case 182:
printf ("invokevirtual ");
break;
case 128:
printf ("ior ");
break;
case 112:
printf ("irem ");
break;
case 172:
printf ("ireturn ");
break;
case 120:
printf ("ishl ");
break;
case 122:
printf ("ishr ");
break;
case 54:
printf ("istore ");
break;
case 59:
printf ("istore_0 ");
break;
case 60:
printf ("istore_1 ");
break;
case 61:
printf ("istore_2 ");
break;
case 62:
printf ("istore_3 ");
break;
case 100:
printf ("isub ");
break;
case 124:
printf ("iushr ");
break;
case 130:
printf ("ixor ");
break;
case 168:
printf ("jsr ");
break;
case 201:
printf ("jsr_w ");
break;
case 138:
printf ("l2d ");
break;
case 137:
printf ("l2f ");
break;
case 136:
printf ("l2i ");
break;
case 97:
printf ("ladd ");
break;
case 47:
printf ("laload ");
break;
case 127:
printf ("land ");
break;
case 80:
printf ("lastore ");
break;
case 148:
printf ("lcmd ");
break;
case 9:
printf ("lconst_0 ");
break;
case 10:
printf ("lconst_1 ");
break;
case 18:
printf ("ldc ");
break;
case 19:
printf ("ldc_w ");
break;
case 20:
printf ("ldc2_w ");
break;
case 109:
printf ("ldiv ");
break;
case 22:
printf ("lload ");
break;
case 30:
printf ("lload_0 ");
break;
case 31:
printf ("lload_1 ");
break;
case 32:
printf ("lload_2 ");
break;
case 33:
printf ("lload_3 ");
break;
case 105:
printf ("lmul ");
break;
case 117:
printf ("lneg ");
break;
case 171:
printf ("lookupswitch ");
break;
case 129:
printf ("lor ");
break;
case 113:
printf ("lrem ");
break;
case 173:
printf ("lreturn ");
break;
case 121:
printf ("lshl ");
break;
case 123:
printf ("lshr ");
break;
case 55:
printf ("lstore ");
break;
case 63:
printf ("lstore_0 ");
break;
case 64:
printf ("lstore_1 ");
break;
case 65:
printf ("lstore_2 ");
break;
case 66:
printf ("lstore_3 ");
break;
case 101:
printf ("lsub ");
break;
case 125:
printf ("lushr ");
break;
case 131:
printf ("lxor ");
break;
case 194:
printf ("monitorenter ");
break;
case 195:
printf ("monitorexit ");
break;
case 197:
printf ("multianewarray ");
break;
case 187:
printf ("new ");
break;
case 188:
printf ("newarray ");
break;
case 0:
printf ("nop ");
break;
case 87:
printf ("pop ");
break;
case 88:
printf ("pop2 ");
break;
case 181:
printf ("putfield ");
break;
case 179:
printf ("putstatic ");
break;
case 169:
printf ("ret ");
break;
case 177:
printf ("return ");
break;
case 53:
printf ("saload ");
break;
case 86:
printf ("sastore ");
break;
case 17:
printf ("sipush ");
break;
case 95:
printf ("swap ");
break;
case 170:
printf ("tableswitch ");
break;
case 196:
printf ("wide ");
break;
case 202: /* reserved item */
printf ("breakpoint ");
break;
case 254: /* reserved item */
printf ("impdep1 ");
break;
case 255: /* reserved item */
printf ("impdep2 ");
break;
default:
printf ("OPCODE %02X(%d) ", buffer[i], buffer[i]);
}
OPCODE = 0;
} else
switch (buffer[i]) {
case '\0':
case '>':
case '<':
printf ("\n");
OPCODE = 1;
break;
default:
if (isprint (buffer[i]))
printf ("%c", buffer[i]);
else
printf ("%02X ", buffer[i]);
}
}
}
printf ("\n");
if (f != NULL)
fclose (f);
return EXIT_SUCCESS;
}