Add more reprl options and have fuzzilli pick them

Summary: Give fuzzilli a way to fuzz runtime options. I will adjust the repro job accordingly in a separate diff.

Reviewed By: 0xedward

Differential Revision: D45609078

fbshipit-source-id: 5000d8e96fe6fd93260a8deca56aa793b684d9bf

tools/fuzzers/fuzzilli/profile/HermesProfile.swift

@@ -9,7 +9,18 @@ import Fuzzilli
 
 let hermesProfile = Profile(
     getProcessArguments:  { (randomizingArguments: Bool) -> [String] in
-      return ["--reprl"]
+      var args = ["--reprl"]
+
+      guard randomizingArguments else { return args }
+
+      if probability(0.5) { args.append("--compile") }
+      if probability(0.5) { args.append("--lazy-compilation") }
+      if probability(0.5) { args.append("--optimize") }
+      if probability(0.5) { args.append("--async-break") }
+      if probability(0.5) { args.append("--block-scoping") }
+      if probability(0.5) { args.append("--random-mem-layout") }
+
+      return args
     },
 
     processEnv: ["UBSAN_OPTIONS": "handle_segv=0"],