/*
* Copyright (c) 2011, 2015, 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.
*
* 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.
*/
/*
* @test
* @bug 7022337
* @summary repeated warnings about bootclasspath not set
* @library /tools/javac/lib
* @modules jdk.compiler
* @build JavacTestingAbstractProcessor TestWarnErrorCount
* @run main TestWarnErrorCount
*/
import java.io.*;
import java.util.*;
import javax.annotation.processing.*;
import javax.lang.model.element.*;
import javax.tools.*;
@SupportedOptions({"errKind", "msgrWarnKind", "javaWarnKind"})
public class TestWarnErrorCount extends JavacTestingAbstractProcessor {
public static void main(String... args) throws Exception {
new TestWarnErrorCount().run(args);
}
final int MAX_GEN = 10;
final int ERROR_ROUND = MAX_GEN / 2; // when to generate error
/**
* Type of errors to generate in test case.
*/
enum ErrorKind {
/** No errors. */
NONE,
/** Source code errors. */
JAVA,
/** Errors reported to Messager. */
MESSAGER,
/** Error as a result of using -Werror. */
WERROR,
}
/**
* Frequency of warnings in test case.
*/
enum WarnKind {
/** No warnings. */
NONE {
boolean warn(int round) { return false; }
int count(int start, int end) { return 0; }
},
/** Generate a warning if round count is a multiple of 2. */
EVERY_TWO {
boolean warn(int round) { return (round % 2) == 0; }
int count(int start, int end) { return (end / 2) - ((start - 1)/ 2); }
},
/** Generate a warning if round count is a multiple of 3. */
EVERY_THREE {
boolean warn(int round) { return (round % 3) == 0; }
int count(int start, int end) { return (end / 3) - ((start - 1)/ 3); }
},
/** Generate a warning every round. */
ALL {
boolean warn(int round) { return true; }
int count(int start, int end) { return (end - start + 1); }
};
/** whether to generate a warning in round 'round'. */
abstract boolean warn(int round);
/** number of warnings generated in a range of rounds, inclusive. */
abstract int count(int start, int end);
}
/**
* Run test.
* @param args provide ability to specify particular test cases for debugging.
*/
void run(String... args) throws Exception {
for (String arg: args) {
if (arg.matches("[0-9]+")) {
if (testCases == null)
testCases = new HashSet<Integer>();
testCases.add(Integer.valueOf(arg));
} else if (arg.equals("-stopOnError")) {
stopOnError = true;
} else
throw new IllegalArgumentException(arg);
}
run ();
if (errors > 0)
throw new Exception(errors + " errors found");
}
/**
* Run test.
*/
void run() throws Exception {
for (ErrorKind ek: ErrorKind.values()) {
for (WarnKind mwk: WarnKind.values()) {
for (WarnKind jwk: WarnKind.values()) {
test(ek, mwk, jwk);
if (stopOnError && errors > 0)
throw new Exception(errors + " errors found");
}
}
}
}
boolean stopOnError;
Set<Integer> testCases;
int testNum = 0;
/**
* Run a test case.
* @param ek The type of errors to generate
* @param mwk The frequency of Messager warnings to generate
* @param jwk The frequency of Java warnings to generate
*/
void test(ErrorKind ek, WarnKind mwk, WarnKind jwk) {
testNum++;
if (testCases != null && !testCases.contains(testNum))
return;
System.err.println("Test " + testNum + ": ek:" + ek + " mwk:" + mwk + " jwk:" + jwk);
File testDir = new File("test" + testNum);
testDir.mkdirs();
String myName = TestWarnErrorCount.class.getSimpleName();
File testSrc = new File(System.getProperty("test.src"));
File file = new File(testSrc, myName + ".java");
List<String> args = new ArrayList<String>();
args.addAll(Arrays.asList(
"-XDrawDiagnostics",
"-d", testDir.getPath(),
"-processor", myName,
// "-XprintRounds",
"-Xlint:all,-path",
"-AerrKind=" + ek,
"-AmsgrWarnKind=" + mwk,
"-AjavaWarnKind=" + jwk));
if (ek == ErrorKind.WERROR)
args.add("-Werror");
args.add(file.getPath());
String out = compile(args.toArray(new String[args.size()]));
int errsFound = 0;
int errsReported = 0;
int warnsFound = 0;
int warnsReported = 0;
// Scan the output looking for messages of interest.
for (String line: out.split("[\r\n]+")) {
if (line.contains("compiler.err.")) {
errsFound++;
} else if (line.contains("compiler.warn.")) {
warnsFound++;
} else if (line.matches("[0-9]+ error(?:s?)")) {
errsReported = Integer.valueOf(line.substring(0, line.indexOf("error")).trim());
} else if (line.matches("[0-9]+ warning(?:s?)")) {
warnsReported = Integer.valueOf(line.substring(0, line.indexOf("warning")).trim());
}
}
// Compute the expected number of errors and warnings, based on
// the test case parameters.
// This is highly specific to the annotation processor below, and to
// the files it generates.
// Generally, the rules are:
// -- errors stop annotation processing, allowing for one extra "last round"
// -- messager warnings are immediate
// -- javac warnings are not shown before the final compilation
// (FIXME? -Werror does not stop processing for java warnings)
int errsExpected;
int msgrWarnsExpected;
int javaWarnsExpected;
switch (ek) {
case NONE:
errsExpected = 0;
msgrWarnsExpected = mwk.count(1, 1 + MAX_GEN + 1);
javaWarnsExpected = jwk.count(2, 1 + MAX_GEN);
break;
case MESSAGER:
errsExpected = 1;
msgrWarnsExpected = mwk.count(1, ERROR_ROUND + 1);
javaWarnsExpected = 0;
break;
case JAVA:
errsExpected = 1;
msgrWarnsExpected = mwk.count(1, ERROR_ROUND + 1);
javaWarnsExpected = 0;
break;
case WERROR:
errsExpected = (mwk != WarnKind.NONE || jwk != WarnKind.NONE) ? 1 : 0;
switch (mwk) {
case NONE:
msgrWarnsExpected = 0;
javaWarnsExpected = (jwk == WarnKind.NONE)
? 0
: 1; // this is surprising: javac only reports warning in first file
break;
case EVERY_TWO:
msgrWarnsExpected = mwk.count(1, 2 + 1);
javaWarnsExpected = 0;
break;
case EVERY_THREE:
msgrWarnsExpected = mwk.count(1, 3 + 1);
javaWarnsExpected = 0;
break;
case ALL:
msgrWarnsExpected = mwk.count(1, 1 + 1);
javaWarnsExpected = 0;
break;
default:
throw new IllegalStateException();
}
break;
default:
throw new IllegalStateException();
}
int warnsExpected = msgrWarnsExpected + javaWarnsExpected;
System.err.println("mwk: " + msgrWarnsExpected
+ ", jwk: " + javaWarnsExpected
+ ", total: " + warnsExpected);
boolean ok;
ok = checkEqual("errors", "reported", errsFound, errsReported);
ok &= checkEqual("errors", "expected", errsFound, errsExpected);
ok &= checkEqual("warnings", "reported", warnsFound, warnsReported);
ok &= checkEqual("warnings", "expected", warnsFound, warnsExpected);
if (ok)
System.err.println("OK");
System.err.println();
}
String compile(String... args) {
StringWriter sw = new StringWriter();
PrintWriter pw = new PrintWriter(sw);
int rc = com.sun.tools.javac.Main.compile(args, pw);
pw.close();
String out = sw.toString();
if (!out.isEmpty())
System.err.println(out);
if (rc != 0)
System.err.println("compilation failed: rc=" + rc);
return out;
}
boolean checkEqual(String l1, String l2, int i1, int i2) {
if (i1 != i2)
error("number of " + l1 + " found, " + i1 + ", does not match number " + l2 + ", " + i2);
return (i1 == i2);
}
void error(String msg) {
System.err.println("Error: " + msg);
errors++;
}
int errors = 0;
// ----- Annotation processor -----
int round = 0;
@Override
public boolean process(Set<? extends TypeElement> annotations, RoundEnvironment roundEnv) {
round++;
ErrorKind ek = ErrorKind.valueOf(options.get("errKind"));
WarnKind mwk = WarnKind.valueOf(options.get("msgrWarnKind"));
WarnKind jwk = WarnKind.valueOf(options.get("javaWarnKind"));
messager.printMessage(Diagnostic.Kind.NOTE,
"Round " + round
+ " " + roundEnv.getRootElements()
+ ", last round: " + roundEnv.processingOver());
messager.printMessage(Diagnostic.Kind.NOTE,
"ek: " + ek + ", mwk: " + mwk + ", jwk: " + jwk);
if (round <= MAX_GEN && !roundEnv.processingOver())
generate("Gen" + round,
(ek == ErrorKind.JAVA) && (round == ERROR_ROUND),
jwk.warn(round));
if (mwk.warn(round))
messager.printMessage(Diagnostic.Kind.WARNING, "round " + round);
if ((ek == ErrorKind.MESSAGER) && (round == ERROR_ROUND))
messager.printMessage(Diagnostic.Kind.ERROR, "round " + round);
return true;
}
void generate(String name, boolean error, boolean warn) {
try {
JavaFileObject fo = filer.createSourceFile(name);
Writer out = fo.openWriter();
try {
out.write("class " + name + " {\n"
+ (warn ? " void m() throws Exception { try (AutoCloseable ac = null) { } }" : "")
+ (error ? " ERROR\n" : "")
+ "}\n");
} finally {
out.close();
}
} catch (IOException e) {
throw new Error(e);
}
}
}