sample programs added

Author: jingxueguo

example_1.py

@@ -0,0 +1,32 @@
+def get_initial_corpus():
+    return ["fuzz"]
+
+i = 0
+
+def entrypoint(s):
+    global i
+    i += 1
+    print(f'trial {i}')
+
+    j = 0
+    k = 1
+
+    while j < 5:
+        a = 0 ## placeholder to simulate presence of some code
+        b = 0 ## placeholder to simulate presence of some code
+        if len(s) > j * 5 + 2:
+            a = 1 ## placeholder to simulate presence of some code
+            b = 1 ## placeholder to simulate presence of some code
+            while k < 10:
+                if (k > 5):
+                    if len(s) > k * 2:
+                        if s[k+1] == 'f':
+                            if s[k*2 - 1] == 's':
+                                print(f'bug found after {i} trials')
+                                exit(219)
+                k += 1
+        j += 1
+
+if __name__ == "__main__":
+  for p in range(0, 110):
+      entrypoint(get_initial_corpus()[0])

example_2.py

@@ -0,0 +1,38 @@
+def get_initial_corpus():
+    return ["fuzz"]
+
+i = 0
+
+def entrypoint(s):
+    global i
+    i += 1
+    print(f'trial {i}')
+
+    j = 0
+    k = 1
+
+    while j < 5:
+        a = 0 ## placeholder to simulate presence of some code
+        b = 0 ## placeholder to simulate presence of some code
+        if len(s) > j * 5 + 2:
+            a = 1 ## placeholder to simulate presence of some code
+            b = 1 ## placeholder to simulate presence of some code
+            while k < 10:
+                if (k > 5):
+                    if len(s) > k * 2:
+                        if s[k+1] == 'f':
+                            if s[k*2 - 1] == 's':
+                                print(f'bug found after {i} trials')
+                                exit(219)
+                k += 1
+        else:
+            if len(s) > 2:
+                if len(s) < 10:
+                    if s[-1] == 'b':
+                        print(f'bug found in else branch after {i} trials')
+                        exit(219)
+        j += 1
+
+if __name__ == "__main__":
+  for p in range(0, 110):
+      entrypoint(get_initial_corpus()[0])

example_3.py

@@ -0,0 +1,42 @@
+def get_initial_corpus():
+    return ["fuzz"]
+
+i = 0
+
+def entrypoint(s):
+    global i
+    i += 1
+    print(f'trial {i}')
+
+    j = 0
+    k = 1
+
+    while j < 5:
+        a = 0 ## placeholder to simulate presence of some code
+        b = 0 ## placeholder to simulate presence of some code
+        if len(s) > j * 5 + 2:
+            a = 1 ## placeholder to simulate presence of some code
+            b = 1 ## placeholder to simulate presence of some code
+            while k < 10:
+                if (k > 5):
+                    if len(s) > k * 2:
+                        if s[k+1] == 'f':
+                            if s[k*2 - 1] == 's':
+                                print(f'bug found after {i} trials')
+                                exit(219)
+                k += 1
+        else:
+            if len(s) > 2:
+                if len(s) > 20:
+                    if s[-1] == 'b':
+                        a = 0
+                        while a < 5:
+                            a += 1
+                            if a == 3:
+                                print(f'bug found in else branch after {i} trials')
+                                exit(219)
+        j += 1
+
+if __name__ == "__main__":
+  for p in range(0, 110):
+      entrypoint(get_initial_corpus()[0])

student_fuzzer.py

@@ -83,4 +83,7 @@ def coverage(self):
     # line_runner = mf.FunctionCoverageRunner(entrypoint)
 
     fast_fuzzer = gbf.CountingGreyboxFuzzer(seed_inputs, gbf.Mutator(), fast_schedule)
-    fast_fuzzer.runs(line_runner, trials=999999999)
+    n = 99999999
+    start = time.time()
+    fast_fuzzer.runs(line_runner, trials=n)
+    end = time.time()