1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 public class Main { 18 static Main obj; 19 // Make 'doCheck' volatile to prevent optimizations 20 // in $noinline$bar like LICM that could hoist the null check 21 // out of the loop. 22 static volatile boolean doCheck = true; 23 24 float floatField; 25 int intField; 26 27 public static void main(String[] args) { 28 try { 29 $noinline$bar(); 30 throw new Error("Expected NPE"); 31 } catch (NullPointerException e) { 32 check(e, 29, 52, "$noinline$bar"); 33 } 34 35 try { 36 $noinline$foo(); 37 throw new Error("Expected NPE"); 38 } catch (NullPointerException e) { 39 check(e, 36, 44, "$noinline$foo"); 40 } 41 } 42 43 public static float $noinline$foo() { 44 int v1 = obj.intField; 45 float v2 = obj.floatField; 46 return v2; 47 } 48 49 public static float $noinline$bar() { 50 float a = 0; 51 while (doCheck) { 52 float f = obj.floatField; 53 int i = obj.intField; 54 a = (float)i + f; 55 } 56 return a; 57 } 58 59 static void check(NullPointerException npe, int mainLine, int methodLine, String methodName) { 60 StackTraceElement[] trace = npe.getStackTrace(); 61 checkElement(trace[0], "Main", methodName, "Main.java", methodLine); 62 checkElement(trace[1], "Main", "main", "Main.java", mainLine); 63 } 64 65 static void checkElement(StackTraceElement element, 66 String declaringClass, String methodName, 67 String fileName, int lineNumber) { 68 assertEquals(declaringClass, element.getClassName()); 69 assertEquals(methodName, element.getMethodName()); 70 assertEquals(fileName, element.getFileName()); 71 assertEquals(lineNumber, element.getLineNumber()); 72 } 73 74 static void assertEquals(Object expected, Object actual) { 75 if (!expected.equals(actual)) { 76 String msg = "Expected \"" + expected + "\" but got \"" + actual + "\""; 77 throw new AssertionError(msg); 78 } 79 } 80 81 static void assertEquals(int expected, int actual) { 82 if (expected != actual) { 83 throw new AssertionError("Expected " + expected + " got " + actual); 84 } 85 } 86 } 87
