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Print any code

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Print any code even if it is obfuscated with not valid op codes and other garbage. Also it can print any custom modification of byte code instead of fall with Exception.
This commit is contained in:
Enyby
2018-07-02 04:29:52 +03:00
committed by GitHub
parent 3b71b31c36
commit ca0b5acb18
1 changed files with 116 additions and 92 deletions
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26
src/core/org/luaj/vm2/Print.java
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@@ -128,6 +128,10 @@ public class Print extends Lua {
} }
static void printValue( PrintStream ps, LuaValue v ) { static void printValue( PrintStream ps, LuaValue v ) {
if (v == null) {
ps.print("null");
return;
}
switch ( v.type() ) { switch ( v.type() ) {
case LuaValue.TSTRING: printString( ps, (LuaString) v ); break; case LuaValue.TSTRING: printString( ps, (LuaString) v ); break;
default: ps.print( v.tojstring() ); default: ps.print( v.tojstring() );
@@ -136,7 +140,7 @@ public class Print extends Lua {
} }
static void printConstant(PrintStream ps, Prototype f, int i) { static void printConstant(PrintStream ps, Prototype f, int i) {
printValue( ps, f.k[i] ); printValue( ps, i < f.k.length ? f.k[i] : LuaValue.valueOf("UNKNOWN_CONST_" + i) );
} }
static void printUpvalue(PrintStream ps, Upvaldesc u) { static void printUpvalue(PrintStream ps, Upvaldesc u) {
@@ -189,6 +193,9 @@ public class Print extends Lua {
ps.print("[" + line + "] "); ps.print("[" + line + "] ");
else else
ps.print("[-] "); ps.print("[-] ");
if (o >= OPNAMES.length - 1) {
ps.print("UNKNOWN_OP_" + o + " ");
} else {
ps.print(OPNAMES[o] + " "); ps.print(OPNAMES[o] + " ");
switch (getOpMode(o)) { switch (getOpMode(o)) {
case iABC: case iABC:
@@ -220,11 +227,19 @@ public class Print extends Lua {
case OP_GETUPVAL: case OP_GETUPVAL:
case OP_SETUPVAL: case OP_SETUPVAL:
ps.print(" ; "); ps.print(" ; ");
if (b < f.upvalues.length) {
printUpvalue(ps, f.upvalues[b]); printUpvalue(ps, f.upvalues[b]);
} else {
ps.print("UNKNOWN_UPVALUE_" + b);
}
break; break;
case OP_GETTABUP: case OP_GETTABUP:
ps.print(" ; "); ps.print(" ; ");
if (b < f.upvalues.length) {
printUpvalue(ps, f.upvalues[b]); printUpvalue(ps, f.upvalues[b]);
} else {
ps.print("UNKNOWN_UPVALUE_" + b);
}
ps.print(" "); ps.print(" ");
if (ISK(c)) if (ISK(c))
printConstant(ps, f, INDEXK(c)); printConstant(ps, f, INDEXK(c));
@@ -233,7 +248,11 @@ public class Print extends Lua {
break; break;
case OP_SETTABUP: case OP_SETTABUP:
ps.print(" ; "); ps.print(" ; ");
if (a < f.upvalues.length) {
printUpvalue(ps, f.upvalues[a]); printUpvalue(ps, f.upvalues[a]);
} else {
ps.print("UNKNOWN_UPVALUE_" + a);
}
ps.print(" "); ps.print(" ");
if (ISK(b)) if (ISK(b))
printConstant(ps, f, INDEXK(b)); printConstant(ps, f, INDEXK(b));
@@ -280,7 +299,11 @@ public class Print extends Lua {
ps.print(" ; to " + (sbx + pc + 2)); ps.print(" ; to " + (sbx + pc + 2));
break; break;
case OP_CLOSURE: case OP_CLOSURE:
if (bx < f.p.length) {
ps.print(" ; " + f.p[bx].getClass().getName()); ps.print(" ; " + f.p[bx].getClass().getName());
} else {
ps.print(" ; UNKNOWN_PROTYPE_" + bx);
}
break; break;
case OP_SETLIST: case OP_SETLIST:
if (c == 0) if (c == 0)
@@ -294,6 +317,7 @@ public class Print extends Lua {
default: default:
break; break;
} }
}
return pc; return pc;
} }