From: ricow@chromium.org <ricow@chromium.org@ce2b1a6d-e550-0410-aec6-3dcde31c8c00>
Date: Tue, 9 Feb 2010 12:15:34 +0000 (+0000)
Subject: Changed fuzzer to randomly remove half of the arguments when running
X-Git-Tag: upstream/4.7.83~22520
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=df1df78c48a72662d33eaaab6a97628d66308a52;p=platform%2Fupstream%2Fv8.git

Changed fuzzer to randomly remove half of the arguments when running
on functions that takes five or more arguments. Original version runs
for a long time when there is 5 arguments in a runtime function (45+
seconds). The fuzzer can be run with all arguments on all functions
regardless of the number of arguments by setting
RUN_WITH_ALL_ARGUMENT_ENTRIES to true in fuzz-natives.js


Review URL: http://codereview.chromium.org/598011

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3819 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
---

diff --git a/test/mjsunit/fuzz-natives.js b/test/mjsunit/fuzz-natives.js
index d906eb8a4..e2f601eb9 100644
--- a/test/mjsunit/fuzz-natives.js
+++ b/test/mjsunit/fuzz-natives.js
@@ -27,6 +27,9 @@
 
 // Flags: --allow-natives-syntax
 
+var RUN_WITH_ALL_ARGUMENT_ENTRIES = false;
+var kOnManyArgumentsRemove = 5;
+
 function makeArguments() {
   var result = [ ];
   result.push(17);
@@ -74,13 +77,23 @@ function testArgumentTypes(name, argc) {
   var func = makeFunction(name, argc);
   while (hasMore) {
     var argPool = makeArguments();
+    // When we have 5 or more arguments we lower the amount of tests cases
+    // by randomly removing kOnManyArgumentsRemove entries
+    var numArguments = RUN_WITH_ALL_ARGUMENT_ENTRIES ?
+      kArgObjects : kArgObjects-kOnManyArgumentsRemove;
+    if (argc >= 5 && !RUN_WITH_ALL_ARGUMENT_ENTRIES) {
+      for (var i = 0; i < kOnManyArgumentsRemove; i++) {
+        var rand = Math.floor(Math.random() * (kArgObjects - i));
+        argPool.splice(rand,1);
+      }
+    }
     var current = type;
     var hasMore = false;
     var argList = [ ];
     for (var i = 0; i < argc; i++) {
-      var index = current % kArgObjects;
-      current = (current / kArgObjects) << 0;
-      if (index != (kArgObjects - 1))
+      var index = current % numArguments;
+      current = (current / numArguments) << 0;
+      if (index != (numArguments - 1))
         hasMore = true;
       argList.push(argPool[index]);
     }