8037086: Check that deoptimizing recompilations are correct

Reviewed-by: attila, lagergren

nashorn/test/src/jdk/nashorn/internal/runtime/OptimisticRecompilationTest.java

+/*
+ * Copyright (c) 2014, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+package jdk.nashorn.internal.runtime;
+
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import static org.testng.Assert.fail;
+import org.testng.annotations.Test;
+import org.testng.annotations.AfterTest;
+import org.testng.annotations.BeforeTest;
+import javax.script.ScriptEngine;
+import javax.script.ScriptEngineFactory;
+import javax.script.ScriptEngineManager;
+import jdk.nashorn.api.scripting.NashornScriptEngineFactory;
+
+/**
+ * @test
+ * @bug 8037086
+ * @run testng/othervm jdk.nashorn.internal.runtime.OptimisticRecompilationTest
+ */
+public class OptimisticRecompilationTest {
+
+   private ScriptEngine engine;
+   private ByteArrayOutputStream stderr;
+   private PrintStream prevStderr;
+
+   public void runTest(String script, String expectedOutputPattern,
+                       int expectedPatternOccurrence) {
+      try {
+         engine.eval(script);
+      } catch (final Exception se) {
+         se.printStackTrace();
+         fail(se.getMessage());
+      }
+      Pattern deoptimizing = Pattern.compile(expectedOutputPattern);
+      Matcher matcher = deoptimizing.matcher(stderr.toString());
+      int matches = 0;
+      while (matcher.find()) {
+         matches++;
+      }
+      if (matches != expectedPatternOccurrence) {
+         fail("Number of Deoptimizing recompilation is not correct, expected: "
+                    + expectedPatternOccurrence + " and found: " + matches + "\n"
+              + stderr);
+      }
+      stderr.reset();
+   }
+
+   private static String getRecompilationPattern(String type, String value) {
+        return "\\[recompile\\]\\s*RewriteException\\s\\[programPoint\\=(\\d+)\\s"
+           + "returnType=" + type + "\\s\\(" + value + "\\)";
+   }
+
+    @BeforeTest
+    public void setupTest() {
+       stderr = new ByteArrayOutputStream();
+       prevStderr = System.err;
+       System.setErr(new PrintStream(stderr));
+       NashornScriptEngineFactory nashornFactory = null;
+       ScriptEngineManager sm = new ScriptEngineManager();
+       for (ScriptEngineFactory fac : sm.getEngineFactories()) {
+          if (fac instanceof NashornScriptEngineFactory) {
+             nashornFactory = (NashornScriptEngineFactory) fac;
+             break;
+          }
+       }
+       if (nashornFactory == null) {
+          fail("Cannot find nashorn factory!");
+       }
+       String[] options = new String[]{"--log=recompile"};
+       engine = nashornFactory.getScriptEngine(options);
+    }
+
+    @AfterTest
+    public void setErrTest() {
+       System.setErr(prevStderr);
+    }
+
+    @Test
+    public void divisionByZeroTest() {
+       //Check that two Deoptimizing recompilations and RewriteExceptions happened
+       runTest("function f() {var x = { a: 2, b:1 }; x.a = Number.POSITIVE_INFINITY;"
+               + " x.b = 0; print(x.a/x.b);} f()",
+               getRecompilationPattern("double", "Infinity"), 2);
+    }
+
+    @Test
+    public void divisionWithRemainderTest() {
+       //Check that one Deoptimizing recompilation and RewriteException happened
+       runTest("function f() {var x = { a: 7, b:2 }; print(x.a/x.b);} f()",
+               getRecompilationPattern("double", "3.5"), 1);
+    }
+
+    @Test
+    public void infinityMultiplicationTest() {
+       //Check that three Deoptimizing recompilations and RewriteExceptions happened
+       runTest("function f() {var x = { a: Number.POSITIVE_INFINITY, "
+               + "b: Number.POSITIVE_INFINITY}; print(x.a*x.b);} f()",
+               getRecompilationPattern("double", "Infinity"), 3);
+    }
+
+    @Test
+    public void maxValueMultiplicationTest() {
+       runTest("function f() {var x = { a: Number.MAX_VALUE, b: Number.MAX_VALUE};"
+               + " print(x.a*x.b);} f()",
+               getRecompilationPattern("double", "1.7976931348623157E308"), 3);
+    }
+
+    @Test
+    public void divisionByInfinityTest() {
+       //Check that two Deoptimizing recompilations and RewriteExceptions happened
+       runTest("function f() {var x = { a: -1, b: Number.POSITIVE_INFINITY};"
+               + " print(x.a/x.b);} f()",
+               getRecompilationPattern("double", "Infinity"), 2);
+    }
+
+    @Test
+    public void divisionByStringTest() {
+       //Check that three Deoptimizing recompilations and RewriteExceptions happened
+       String str1 = getRecompilationPattern("double", "Infinity");
+       String str2 = getRecompilationPattern("object", "Hello");
+       runTest("function f() {var x = { a: Number.POSITIVE_INFINITY, b: 'Hello'};"
+               + " print(x.a/x.b);} f()", String.format("(?s)%s.*%1$s.*%s", str1, str2), 1);
+    }
+
+    @Test
+    public void nestedFunctionTest() {
+       //Check that one Deoptimizing recompilations and RewriteExceptions happened
+       runTest("var a=3,b,c; function f() {var x = 2, y =1; function g(){ "
+               + "var y = x; var z = a; z = x*y; print(a*b); } g() } f()",
+               getRecompilationPattern("object", "undefined"), 1);
+    }
+
+    @Test
+    public void andTest() {
+       //Check that one Deoptimizing recompilations and RewriteExceptions happened
+       runTest("function f(a,b) { d = a && b; print(d);} f()",
+               "\\[recompile\\]\\sDeoptimizing\\srecompilation\\sof\\s\'f\'", 1);
+    }
+
+    @Test
+    public void functionTest() {
+       //Check that one Deoptimizing recompilations and RewriteExceptions happened
+       runTest("function f(a,b,c) { d = (a + b) * c; print(d);} f()",
+               getRecompilationPattern("double", "NaN"), 1);
+    }
+}