/*
* Copyright (c) 2018, 2020, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* The Universal Permissive License (UPL), Version 1.0
*
* Subject to the condition set forth below, permission is hereby granted to any
* person obtaining a copy of this software, associated documentation and/or
* data (collectively the "Software"), free of charge and under any and all
* copyright rights in the Software, and any and all patent rights owned or
* freely licensable by each licensor hereunder covering either (i) the
* unmodified Software as contributed to or provided by such licensor, or (ii)
* the Larger Works (as defined below), to deal in both
*
* (a) the Software, and
*
* (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
* one is included with the Software each a "Larger Work" to which the Software
* is contributed by such licensors),
*
* without restriction, including without limitation the rights to copy, create
* derivative works of, display, perform, and distribute the Software and make,
* use, sell, offer for sale, import, export, have made, and have sold the
* Software and the Larger Work(s), and to sublicense the foregoing rights on
* either these or other terms.
*
* This license is subject to the following condition:
*
* The above copyright notice and either this complete permission notice or at a
* minimum a reference to the UPL must be included in all copies or substantial
* portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package com.oracle.truffle.js.test.instrumentation;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import com.oracle.truffle.js.nodes.instrumentation.JSTags.BinaryOperationTag;
import com.oracle.truffle.js.nodes.instrumentation.JSTags.ControlFlowBlockTag;
import com.oracle.truffle.js.nodes.instrumentation.JSTags.ControlFlowBranchTag;
import com.oracle.truffle.js.nodes.instrumentation.JSTags.ControlFlowRootTag;
import com.oracle.truffle.js.runtime.JSConfig;
public class SwitchStatementTest extends FineGrainedAccessTest {
private boolean savedSwitchConfigValue;
@Before
public void before() {
savedSwitchConfigValue = JSConfig.OptimizeNoFallthroughSwitch;
}
@After
public void after() {
JSConfig.OptimizeNoFallthroughSwitch = savedSwitchConfigValue;
}
@Test
public void desugaredSwitchBreak() {
JSConfig.OptimizeNoFallthroughSwitch = true;
// Graal.js converts certain switch statements to if-then-else chains. This generates nested
// events.
String src = "var a = 42;" +
"switch (a) {\n" +
" case 1:" +
" break;" +
" case 42:" +
" 42;" +
" break;" +
" default:" +
"}";
evalWithTags(src, new Class[]{
ControlFlowRootTag.class,
ControlFlowBranchTag.class,
ControlFlowBlockTag.class
}, new Class[]{/* no input events */});
enter(ControlFlowRootTag.class, (e, r) -> {
// first 'if' statement condition is false
enter(ControlFlowBranchTag.class).exit(assertReturnValue(false));
// we enter the first 'else' branch
enter(ControlFlowBlockTag.class, (e1, b) -> {
// a nested if is executed for the second case
enter(ControlFlowRootTag.class, (e2, r2) -> {
// second case returns true
enter(ControlFlowBranchTag.class).exit(assertReturnValue(true));
// we enter the 'case 2' branch
enter(ControlFlowBlockTag.class, (e3, b2) -> {
// the branch returns. The statement evaluates '42'
}).exit(assertReturnValue(42));
}).exit();
}).exit();
}).exit();
}
@Test
public void normalSwitchBreak() {
JSConfig.OptimizeNoFallthroughSwitch = false;
String src = "var a = 42;" +
"switch (a) {\n" +
" case 1:" +
" break;" +
" case 42:" +
" 42;" +
" break;" +
" default:" +
"}";
evalWithTags(src, new Class[]{
ControlFlowRootTag.class,
ControlFlowBranchTag.class,
ControlFlowBlockTag.class
}, new Class[]{/* no input events */});
enter(ControlFlowRootTag.class, (e, r) -> {
// first case condition is false
enter(ControlFlowBranchTag.class).exit(assertReturnValue(false));
// second case returns true
enter(ControlFlowBranchTag.class).exit(assertReturnValue(true));
// we enter the 'case 2' branch
enter(ControlFlowBlockTag.class, (e3, b2) -> {
enter(ControlFlowBranchTag.class).exitExceptional();
// the branch returns. The statement evaluates '42'
}).exitExceptional();
}).exitExceptional();
}
@Test
public void desugaredSwitchDefault() {
JSConfig.OptimizeNoFallthroughSwitch = true;
// Graal.js converts certain switch statements to if-then-else chains. This generates nested
// events.
String src = "var a = 42;" +
"switch (a) {\n" +
" case 1:" +
" break;" +
" case 2:" +
" break;" +
" default:" +
" 42;" +
"}";
evalWithTags(src, new Class[]{
ControlFlowRootTag.class,
ControlFlowBranchTag.class,
ControlFlowBlockTag.class
}, new Class[]{/* no input events */});
enter(ControlFlowRootTag.class, (e) -> {
// first 'if' statement condition is false
enter(ControlFlowBranchTag.class).exit(assertReturnValue(false));
// we enter the first 'else' branch
enter(ControlFlowBlockTag.class, (e1) -> {
// a nested if is executed for the second case
enter(ControlFlowRootTag.class, (e2) -> {
// second case returns false
enter(ControlFlowBranchTag.class).exit(assertReturnValue(false));
// the innermost 'else' is the default branch
enter(ControlFlowBlockTag.class, (e3) -> {
// the default branch evaluates '42'
}).exit(assertReturnValue(42));
}).exit();
}).exit();
}).exit();
}
@Test
public void normalSwitchDefault() {
JSConfig.OptimizeNoFallthroughSwitch = false;
String src = "var a = 42;" +
"switch (a) {\n" +
" case 1:" +
" break;" +
" case 2:" +
" break;" +
" default:" +
" 42;" +
"}";
evalWithTags(src, new Class[]{
ControlFlowRootTag.class,
ControlFlowBranchTag.class,
ControlFlowBlockTag.class
}, new Class[]{/* no input events */});
enter(ControlFlowRootTag.class, (e) -> {
// first case condition is false
enter(ControlFlowBranchTag.class).exit(assertReturnValue(false));
// second case condition is false
enter(ControlFlowBranchTag.class).exit(assertReturnValue(false));
// default case returns 42
}).exit(assertReturnValue(42));
}
@Test
public void propSwitchTest() {
String src = "var a = {x:2};" +
" var b = {x:1, y:2, z:3};" +
" switch (a.x) {" +
" case b.x:" +
" break;" +
" case b.y:" +
" break;" +
" case b.z:" +
" break;" +
"}";
evalWithTag(src, BinaryOperationTag.class);
enter(BinaryOperationTag.class, (e, b) -> {
assertAttribute(e, "operator", "===");
b.input(2);
b.input(1);
}).exit();
enter(BinaryOperationTag.class, (e, b) -> {
assertAttribute(e, "operator", "===");
b.input(2);
b.input(2);
}).exit();
}
@Test
public void defaultSwitchNode() {
String src = "var a = {" +
" x: 3" +
"};" +
"var b = {" +
" x: 1," +
" y: 2," +
" z: 3" +
"};" +
"var x = 42;" +
"switch (a.x) {" +
" case b.x:" +
" x++;" +
" case b.y:" +
" x++;" +
" case b.z:" +
" ++x;" +
"};";
evalWithTags(src, new Class[]{
ControlFlowRootTag.class,
ControlFlowBranchTag.class
}, new Class[]{/* no input events */});
enter(ControlFlowRootTag.class, (e, r) -> {
// first 'case' a.x == b.x is false
enter(ControlFlowBranchTag.class).exit(assertReturnValue(false));
// first 'case' a.x == b.y is false
enter(ControlFlowBranchTag.class).exit(assertReturnValue(false));
// first 'case' a.x == b.z is true
enter(ControlFlowBranchTag.class).exit(assertReturnValue(true));
// statement returns value from `++x` statement
}).exit(assertReturnValue(43));
}
@Test
public void desugaredSwitchNoBreak() {
JSConfig.OptimizeNoFallthroughSwitch = true;
String src = "var a = 42;" +
"switch (a) {" +
" case 1:" +
" ;" +
" case 2:" +
" ;" +
" default:" +
" 42;" +
"}";
evalWithTags(src, new Class[]{
ControlFlowRootTag.class,
ControlFlowBranchTag.class
}, new Class[]{/* no input events */});
}
@Test
public void normalSwitchNoBreak() {
JSConfig.OptimizeNoFallthroughSwitch = false;
String src = "var a = 42;" +
"switch (a) {" +
" case 1:" +
" ;" +
" case 2:" +
" ;" +
" default:" +
" 42;" +
"}";
evalWithTags(src, new Class[]{
ControlFlowRootTag.class,
ControlFlowBranchTag.class
}, new Class[]{/* no input events */});
enter(ControlFlowRootTag.class, (e, r) -> {
// case 1 is false
enter(ControlFlowBranchTag.class).exit(assertReturnValue(false));
// case 2 is false
enter(ControlFlowBranchTag.class).exit(assertReturnValue(false));
}).exit(assertReturnValue(42));
}
}