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/*
* @test
* @bug 8019486 8026861 8027142
* @summary javac, generates erroneous LVT for a test case with lambda code
* @library /tools/lib
* @modules jdk.compiler/com.sun.tools.javac.api
* jdk.compiler/com.sun.tools.javac.main
* jdk.compiler/com.sun.tools.javac.util
* jdk.jdeps/com.sun.tools.classfile
* @build toolbox.ToolBox toolbox.JavacTask
* @run main WrongLNTForLambdaTest
*/
import java.io.File;
import java.nio.file.Paths;
import com.sun.tools.classfile.ClassFile;
import com.sun.tools.classfile.Code_attribute;
import com.sun.tools.classfile.LineNumberTable_attribute;
import com.sun.tools.classfile.Method;
import com.sun.tools.javac.util.Assert;
import toolbox.JavacTask;
import toolbox.ToolBox;
public class WrongLNTForLambdaTest {
static final String testSource =
/* 01 */ "import java.util.List;\n" +
/* 02 */ "import java.util.Arrays;\n" +
/* 03 */ "import java.util.stream.Collectors;\n" +
/* 04 */ "\n" +
/* 05 */ "public class Foo {\n" +
/* 06 */ " void bar(int value) {\n" +
/* 07 */ " final List<Integer> numbers = Arrays.asList(1, 2, 3);\n" +
/* 08 */ " final List<Integer> numbersPlusOne = \n" +
/* 09 */ " numbers.stream().map(number -> number / 1).collect(Collectors.toList());\n" +
/* 10 */ " }\n" +
/* 11 */ " void variablesInLambdas(int value) {\n" +
/* 12 */ " Runnable r1 = () -> {\n" +
/* 13 */ " int i = value;\n" +
/* 14 */ " class FooBar<T extends CharSequence> {\n" +
/* 15 */ " public void run() {\n" +
/* 16 */ " T t = null;\n" +
/* 17 */ " }\n" +
/* 18 */ " }\n" +
/* 19 */ " };\n" +
/* 20 */ " Runnable r2 = () -> System.err.println(1);\n" +
/* 21 */ " Runnable r3 = (Runnable & java.io.Serializable) this::foo;\n" +
/* 22 */ " Runnable r4 = super :: notify;\n" +
/* 23 */ " }\n" +
/* 24 */ " private void foo() {}\n" +
/* 25 */ " void assignLambda() {\n" +
/* 26 */ " Runnable r = () -> { };\n" +
/* 27 */ " }\n" +
/* 28 */ " void callLambda(int i, Runnable r) {\n" +
/* 29 */ " callLambda(0,\n" +
/* 30 */ " () -> { });\n" +
/* 31 */ " }\n" +
/* 32 */ "}";
static final int[][] simpleLambdaExpectedLNT = {
// {line-number, start-pc},
{9, 0}, //number -> number / 1
};
static final int[][] lambdaWithVarsExpectedLNT = {
// {line-number, start-pc},
{13, 0}, //number -> number / 1
{19, 2}, //number -> number / 1
};
static final int[][] insideLambdaWithVarsExpectedLNT = {
// {line-number, start-pc},
{16, 0}, //number -> number / 1
{17, 2}, //number -> number / 1
};
static final int[][] lambdaVoid2VoidExpectedLNT = {
// {line-number, start-pc},
{20, 0}, //number -> number / 1
};
static final int[][] deserializeExpectedLNT = {
// {line-number, start-pc},
{05, 0}, //number -> number / 1
};
static final int[][] lambdaBridgeExpectedLNT = {
// {line-number, start-pc},
{22, 0}, //number -> number / 1
};
static final int[][] assignmentExpectedLNT = {
// {line-number, start-pc},
{26, 0}, //number -> number / 1
{27, 6}, //number -> number / 1
};
static final int[][] callExpectedLNT = {
// {line-number, start-pc},
{29, 0}, //number -> number / 1
{31, 10}, //number -> number / 1
};
public static void main(String[] args) throws Exception {
new WrongLNTForLambdaTest().run();
}
ToolBox tb = new ToolBox();
void run() throws Exception {
compileTestClass();
checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
"Foo.class").toUri()), "lambda$bar$0", simpleLambdaExpectedLNT);
checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
"Foo.class").toUri()), "lambda$variablesInLambdas$1", lambdaWithVarsExpectedLNT);
checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
"Foo$1FooBar.class").toUri()), "run", insideLambdaWithVarsExpectedLNT);
checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
"Foo.class").toUri()), "lambda$variablesInLambdas$2", lambdaVoid2VoidExpectedLNT);
checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
"Foo.class").toUri()), "$deserializeLambda$", deserializeExpectedLNT);
checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
"Foo.class").toUri()), "lambda$variablesInLambdas$3", lambdaBridgeExpectedLNT);
checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
"Foo.class").toUri()), "assignLambda", assignmentExpectedLNT);
checkClassFile(new File(Paths.get(System.getProperty("user.dir"),
"Foo.class").toUri()), "callLambda", callExpectedLNT);
}
void compileTestClass() throws Exception {
new JavacTask(tb)
.sources(testSource)
.run();
}
void checkClassFile(final File cfile, String methodToFind, int[][] expectedLNT) throws Exception {
ClassFile classFile = ClassFile.read(cfile);
boolean methodFound = false;
for (Method method : classFile.methods) {
if (method.getName(classFile.constant_pool).equals(methodToFind)) {
methodFound = true;
Code_attribute code = (Code_attribute) method.attributes.get("Code");
LineNumberTable_attribute lnt =
(LineNumberTable_attribute) code.attributes.get("LineNumberTable");
Assert.check(lnt.line_number_table_length == expectedLNT.length,
"The LineNumberTable found has a length different to the expected one");
int i = 0;
for (LineNumberTable_attribute.Entry entry: lnt.line_number_table) {
Assert.check(entry.line_number == expectedLNT[i][0] &&
entry.start_pc == expectedLNT[i][1],
"LNT entry at pos " + i + " differ from expected." +
"Found " + entry.line_number + ":" + entry.start_pc +
". Expected " + expectedLNT[i][0] + ":" + expectedLNT[i][1]);
i++;
}
}
}
Assert.check(methodFound, "The seek method was not found");
}
void error(String msg) {
throw new AssertionError(msg);
}
}