diff --git a/fuzz.s b/fuzz.s
new file mode 100644
index 0000000000000000000000000000000000000000..8b137891791fe96927ad78e64b0aad7bded08bdc
--- /dev/null
+++ b/fuzz.s
@@ -0,0 +1 @@
+
diff --git a/fuzzer/Fuzzer.java b/fuzzer/Fuzzer.java
index 1d8a8c0a2cfda5c1b1678325d9b5b1b267c333ad..43aa5122dfa05baf46ad5bb500c0ecb3cc5b81dd 100644
--- a/fuzzer/Fuzzer.java
+++ b/fuzzer/Fuzzer.java
@@ -14,6 +14,7 @@ public class Fuzzer {
private static final List<String> validOpcodes = new ArrayList<String>(Arrays.asList("ADD","SUB","MUL","DIV","LDR","STR","MOV","JMP","JZ"));
private static final int maxRegistry = 32;
private static final int maxMemory = 65536;
+ private static final String alphabet = "1234567890-=`~!@#$%6&*()_+q wertyuiop[]QWERTYUIOP{}|asdfghjkl;ASDFGHJKL:zxcvbnm,./ZXCVBNM<>?\"\'\\";
public static void main(String[] args) throws IOException {
FileOutputStream out = null;
PrintWriter pw = null;
@@ -21,8 +22,10 @@ public class Fuzzer {
out = new FileOutputStream(OUTPUT_FILE);
pw = new PrintWriter(out);
Random rg = new Random();
+ //----------Fuzzer Begins Here----------//
+ pw.println(generateMemoryUnderflow(rg));
-
+ //----------Fuzzer Ends Here----------����
}catch (Exception e){
e.printStackTrace(System.err);
System.exit(1);
@@ -37,7 +40,7 @@ public class Fuzzer {
}
//-----------Generation Functions----------//
- public String generateMemoryOverflow(Random rg) {
+ public static String generateMemoryOverflow(Random rg) {
String line = new String();
line.concat("MOV R0 "+maxMemory+"%n");
line.concat("MOV R1 1 %n");
@@ -49,7 +52,7 @@ public class Fuzzer {
return line;
}
- public String generateMemoryUnderflow(Random rg) {
+ public static String generateMemoryUnderflow(Random rg) {
String line = new String();
line.concat("MOV R0 "+(maxMemory*-1)+"%n");
line.concat("MOV R1 1 %n");
@@ -61,7 +64,7 @@ public class Fuzzer {
return line;
}
- public String generateRegOverflow(Random rg) {
+ public static String generateRegOverflow(Random rg) {
String line = new String();
int invalidRegistry;
Boolean overflow = rg.nextBoolean();
@@ -187,8 +190,7 @@ public class Fuzzer {
return line;
}
- //DZL
- public String generateOffsetOverFlow(Random rg) {
+ public static String generateOffsetOverFlow(Random rg) {
String line = new String();
Boolean positive = rg.nextBoolean();
if(!positive) {
@@ -199,7 +201,7 @@ public class Fuzzer {
return line;
}
- public String generateLineOverFlow() {
+ public static String generateLineOverFlow() {
String line = new String();
line.concat("RET R0");
for(int x=0;x<2000;x++) {
@@ -208,7 +210,7 @@ public class Fuzzer {
return line;
}
- public String generateInstructionOverflow() {
+ public static String generateInstructionOverflow() {
String line = new String();
line.concat("MOV R0 0%n");
line.concat("MOV R1 1");
@@ -218,7 +220,7 @@ public class Fuzzer {
return line;
}
- public String generateDivideByZero(){
+ public static String generateDivideByZero(){
String line = new String();
line.concat("MOV R0 0%n");
line.concat("MOV R1 1%n");
@@ -227,7 +229,7 @@ public class Fuzzer {
return line;
}
- public String generateDirtyRegistyRead() {
+ public static String generateDirtyRegistyRead() {
String line = new String();
for(int x=1;x<maxRegistry-1;x++) {
@@ -237,7 +239,7 @@ public class Fuzzer {
return line;
}
- public String generateDirtyMemoryRead(Random rg) {
+ public static String generateDirtyMemoryRead(Random rg) {
String line = new String();
int attempts = 20;
line.concat("MOV R0 0");
@@ -252,7 +254,7 @@ public class Fuzzer {
return line;
}
- public String jmpOverflow(int programLength,int lineNumber,Random rg) {
+ public static String jmpOverflow(int programLength,int lineNumber,Random rg) {
String line = new String();
int val;
if(rg.nextBoolean()) {
@@ -264,7 +266,7 @@ public class Fuzzer {
return line;
}
- public String jzOverflow(int programLength,int lineNumber,Random rg) {
+ public static String jzOverflow(int programLength,int lineNumber,Random rg) {
String line = new String();
int val;
@@ -278,7 +280,7 @@ public class Fuzzer {
return line;
}
- public String intOverflow() {
+ public static String intOverflow() {
String line = new String();
line.concat("MOV R0 65535%n");
line.concat("MUL R1 R0 R0%n");
@@ -286,7 +288,7 @@ public class Fuzzer {
return line;
}
- public String intUnderflow() {
+ public static String intUnderflow() {
String line = new String();
line.concat("MOV R0 -65535%n");
line.concat("MUL R1 R0 R0%n");
@@ -294,7 +296,7 @@ public class Fuzzer {
return line;
}
- public String generateInvalidOperands(Random rg) {
+ public static String generateInvalidOperands(Random rg) {
int regs = rg.nextInt(4);
String line = new String();
Boolean hasval = rg.nextBoolean();
@@ -313,12 +315,20 @@ public class Fuzzer {
//too many arguments
return null;
}
- //CAL
- public String generateInvalidFunctionName() {
- return null;
+
+ public static String generateInvalidFunctionName(Random rg,String line) {
+ char[] charLine = line.toCharArray();
+ int change = rg.nextInt(3)+1;
+ for(int x=0;x<change;x++) {
+ int index = rg.nextInt(charLine.length);
+ char character = alphabet.charAt(rg.nextInt(alphabet.length()));
+ charLine[index] = character;
+ }
+
+ return charLine.toString();
}
- public String generateInstructionComment(Random rg) {
+ public static String generateInstructionComment(Random rg) {
String line = new String();
line.concat(";");
String instr = generateValidReturn(rg);
@@ -326,14 +336,14 @@ public class Fuzzer {
return line;
}
- public String generateValidReturn(Random rg) {
+ public static String generateValidReturn(Random rg) {
String line = new String();
line.concat("RET");
line.concat(" R"+rg.nextInt(maxRegistry));
return line;
}
- public String generateInvalidReturn(Random rg) {
+ public static String generateInvalidReturn(Random rg) {
int invalidRegistry;
String line = new String();
line.concat("RET");
@@ -349,7 +359,7 @@ public class Fuzzer {
return line;
}
- public String generateValidString(Random rg,int programLength,int lineNumber){
+ public static String generateValidString(Random rg,int programLength,int lineNumber){
int index = rg.nextInt(validOpcodes.size());
String opcode = validOpcodes.get(index);
int numregs = 0;