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A repackaged copy of javac for Error Prone to depend on
/*
* Copyright (c) 2002, 2016, 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 com.sun.tools.javah;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.OutputStream;
import java.io.PrintWriter;
import java.io.Writer;
import java.nio.file.NoSuchFileException;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.MissingResourceException;
import java.util.Objects;
import java.util.ResourceBundle;
import java.util.Set;
import javax.annotation.processing.AbstractProcessor;
import javax.annotation.processing.Messager;
import javax.annotation.processing.ProcessingEnvironment;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.SupportedAnnotationTypes;
import javax.lang.model.SourceVersion;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.TypeElement;
import javax.lang.model.element.VariableElement;
import javax.lang.model.type.ArrayType;
import javax.lang.model.type.DeclaredType;
import javax.lang.model.type.TypeMirror;
import javax.lang.model.type.TypeVisitor;
import javax.lang.model.util.ElementFilter;
import javax.lang.model.util.SimpleTypeVisitor9;
import javax.lang.model.util.Types;
import javax.tools.Diagnostic;
import javax.tools.DiagnosticListener;
import javax.tools.JavaCompiler;
import javax.tools.JavaCompiler.CompilationTask;
import javax.tools.JavaFileManager;
import javax.tools.JavaFileObject;
import javax.tools.StandardJavaFileManager;
import javax.tools.StandardLocation;
import javax.tools.ToolProvider;
import com.sun.tools.javac.code.Symbol.CompletionFailure;
import com.sun.tools.javac.main.CommandLine;
import com.sun.tools.javac.util.DefinedBy;
import com.sun.tools.javac.util.DefinedBy.Api;
import static javax.tools.Diagnostic.Kind.*;
/**
* Javah generates support files for native methods.
* Parse commandline options and invokes javadoc to execute those commands.
*
* This is NOT part of any supported API.
* If you write code that depends on this, you do so at your own
* risk. This code and its internal interfaces are subject to change
* or deletion without notice.
*
* @author Sucheta Dambalkar
* @author Jonathan Gibbons
*/
public class JavahTask implements NativeHeaderTool.NativeHeaderTask {
public class BadArgs extends Exception {
private static final long serialVersionUID = 1479361270874789045L;
BadArgs(String key, Object... args) {
super(JavahTask.this.getMessage(key, args));
this.key = key;
this.args = args;
}
BadArgs showUsage(boolean b) {
showUsage = b;
return this;
}
final String key;
final Object[] args;
boolean showUsage;
}
static abstract class Option {
Option(boolean hasArg, String... aliases) {
this.hasArg = hasArg;
this.aliases = aliases;
}
boolean isHidden() {
return false;
}
boolean matches(String opt) {
for (String a: aliases) {
if (a.equals(opt))
return true;
}
return false;
}
boolean ignoreRest() {
return false;
}
abstract void process(JavahTask task, String opt, String arg) throws BadArgs;
final boolean hasArg;
final String[] aliases;
}
static abstract class HiddenOption extends Option {
HiddenOption(boolean hasArg, String... aliases) {
super(hasArg, aliases);
}
@Override
boolean isHidden() {
return true;
}
}
static final Option[] recognizedOptions = {
new Option(true, "-o") {
void process(JavahTask task, String opt, String arg) {
task.ofile = new File(arg);
}
},
new Option(true, "-d") {
void process(JavahTask task, String opt, String arg) {
task.odir = new File(arg);
}
},
new HiddenOption(true, "-td") {
void process(JavahTask task, String opt, String arg) {
// ignored; for backwards compatibility
}
},
new Option(false, "-v", "-verbose") {
void process(JavahTask task, String opt, String arg) {
task.verbose = true;
}
},
new Option(false, "-h", "-help", "--help", "-?") {
void process(JavahTask task, String opt, String arg) {
task.help = true;
}
},
new HiddenOption(false, "-trace") {
void process(JavahTask task, String opt, String arg) {
task.trace = true;
}
},
new Option(false, "-version") {
void process(JavahTask task, String opt, String arg) {
task.version = true;
}
},
new HiddenOption(false, "-fullversion") {
void process(JavahTask task, String opt, String arg) {
task.fullVersion = true;
}
},
new Option(false, "-jni") {
void process(JavahTask task, String opt, String arg) {
task.jni = true;
}
},
new Option(false, "-force") {
void process(JavahTask task, String opt, String arg) {
task.force = true;
}
},
new HiddenOption(false, "-Xnew") {
void process(JavahTask task, String opt, String arg) {
// we're already using the new javah
}
},
new HiddenOption(false, "-llni", "-Xllni") {
void process(JavahTask task, String opt, String arg) {
task.llni = true;
}
},
new HiddenOption(false, "-llnidouble") {
void process(JavahTask task, String opt, String arg) {
task.llni = true;
task.doubleAlign = true;
}
},
new HiddenOption(false) {
boolean matches(String opt) {
return opt.startsWith("-XD");
}
void process(JavahTask task, String opt, String arg) {
task.javac_extras.add(opt);
}
},
};
JavahTask() {
}
JavahTask(Writer out,
JavaFileManager fileManager,
DiagnosticListener diagnosticListener,
Iterable options,
Iterable classes) {
this();
this.log = getPrintWriterForWriter(out);
this.fileManager = fileManager;
this.diagnosticListener = diagnosticListener;
try {
handleOptions(options, false);
} catch (BadArgs e) {
throw new IllegalArgumentException(e.getMessage());
}
this.classes = new ArrayList<>();
if (classes != null) {
for (String classname: classes) {
Objects.requireNonNull(classname);
this.classes.add(classname);
}
}
}
public void setLocale(Locale locale) {
if (locale == null)
locale = Locale.getDefault();
task_locale = locale;
}
public void setLog(PrintWriter log) {
this.log = log;
}
public void setLog(OutputStream s) {
setLog(getPrintWriterForStream(s));
}
static PrintWriter getPrintWriterForStream(OutputStream s) {
return new PrintWriter(s, true);
}
static PrintWriter getPrintWriterForWriter(Writer w) {
if (w == null)
return getPrintWriterForStream(null);
else if (w instanceof PrintWriter)
return (PrintWriter) w;
else
return new PrintWriter(w, true);
}
public void setDiagnosticListener(DiagnosticListener dl) {
diagnosticListener = dl;
}
public void setDiagnosticListener(OutputStream s) {
setDiagnosticListener(getDiagnosticListenerForStream(s));
}
private DiagnosticListener getDiagnosticListenerForStream(OutputStream s) {
return getDiagnosticListenerForWriter(getPrintWriterForStream(s));
}
private DiagnosticListener getDiagnosticListenerForWriter(Writer w) {
final PrintWriter pw = getPrintWriterForWriter(w);
return diagnostic -> {
if (diagnostic.getKind() == Diagnostic.Kind.ERROR) {
pw.print(getMessage("err.prefix"));
pw.print(" ");
}
pw.println(diagnostic.getMessage(null));
};
}
int run(String[] args) {
try {
handleOptions(args);
boolean ok = run();
return ok ? 0 : 1;
} catch (BadArgs e) {
diagnosticListener.report(createDiagnostic(e.key, e.args));
return 1;
} catch (InternalError e) {
diagnosticListener.report(createDiagnostic("err.internal.error", e.getMessage()));
return 1;
} catch (Util.Exit e) {
return e.exitValue;
} finally {
log.flush();
}
}
public void handleOptions(String[] args) throws BadArgs {
handleOptions(Arrays.asList(args), true);
}
private void handleOptions(Iterable args, boolean allowClasses) throws BadArgs {
if (log == null) {
log = getPrintWriterForStream(System.out);
if (diagnosticListener == null)
diagnosticListener = getDiagnosticListenerForStream(System.err);
} else {
if (diagnosticListener == null)
diagnosticListener = getDiagnosticListenerForWriter(log);
}
if (fileManager == null)
fileManager = getDefaultFileManager(diagnosticListener, log);
Iterator iter = expandAtArgs(args).iterator();
noArgs = !iter.hasNext();
while (iter.hasNext()) {
String arg = iter.next();
if (arg.startsWith("-"))
handleOption(arg, iter);
else if (allowClasses) {
if (classes == null)
classes = new ArrayList<>();
classes.add(arg);
while (iter.hasNext())
classes.add(iter.next());
} else
throw new BadArgs("err.unknown.option", arg).showUsage(true);
}
if ((classes == null || classes.size() == 0) &&
!(noArgs || help || version || fullVersion)) {
throw new BadArgs("err.no.classes.specified");
}
if (jni && llni)
throw new BadArgs("jni.llni.mixed");
if (odir != null && ofile != null)
throw new BadArgs("dir.file.mixed");
}
private void handleOption(String name, Iterator rest) throws BadArgs {
for (Option o: recognizedOptions) {
if (o.matches(name)) {
if (o.hasArg) {
if (rest.hasNext())
o.process(this, name, rest.next());
else
throw new BadArgs("err.missing.arg", name).showUsage(true);
} else
o.process(this, name, null);
if (o.ignoreRest()) {
while (rest.hasNext())
rest.next();
}
return;
}
}
if (fileManager.handleOption(name, rest))
return;
throw new BadArgs("err.unknown.option", name).showUsage(true);
}
private Iterable expandAtArgs(Iterable args) throws BadArgs {
try {
List l = new ArrayList<>();
for (String arg: args) l.add(arg);
return Arrays.asList(CommandLine.parse(l.toArray(new String[l.size()])));
} catch (FileNotFoundException | NoSuchFileException e) {
throw new BadArgs("at.args.file.not.found", e.getLocalizedMessage());
} catch (IOException e) {
throw new BadArgs("at.args.io.exception", e.getLocalizedMessage());
}
}
public Boolean call() {
return run();
}
public boolean run() throws Util.Exit {
if (!javac_extras.contains("-XDsuppress-tool-removal-message")) {
log.println(getMessage("javah.misc.Deprecation"));
}
Util util = new Util(log, diagnosticListener);
if (noArgs || help) {
showHelp();
return help; // treat noArgs as an error for purposes of exit code
}
if (version || fullVersion) {
showVersion(fullVersion);
return true;
}
util.verbose = verbose;
Gen g;
if (llni)
g = new LLNI(doubleAlign, util);
else {
g = new JNI(util);
}
if (ofile != null) {
if (!(fileManager instanceof StandardJavaFileManager)) {
diagnosticListener.report(createDiagnostic("err.cant.use.option.for.fm", "-o"));
return false;
}
Iterable iter =
((StandardJavaFileManager) fileManager).getJavaFileObjectsFromFiles(Collections.singleton(ofile));
JavaFileObject fo = iter.iterator().next();
g.setOutFile(fo);
} else {
if (odir != null) {
if (!(fileManager instanceof StandardJavaFileManager)) {
diagnosticListener.report(createDiagnostic("err.cant.use.option.for.fm", "-d"));
return false;
}
if (!odir.exists())
if (!odir.mkdirs())
util.error("cant.create.dir", odir.toString());
try {
((StandardJavaFileManager) fileManager).setLocation(StandardLocation.CLASS_OUTPUT, Collections.singleton(odir));
} catch (IOException e) {
Object msg = e.getLocalizedMessage();
if (msg == null) {
msg = e;
}
diagnosticListener.report(createDiagnostic("err.ioerror", odir, msg));
return false;
}
}
g.setFileManager(fileManager);
}
/*
* Force set to false will turn off smarts about checking file
* content before writing.
*/
g.setForce(force);
if (fileManager instanceof JavahFileManager)
((JavahFileManager) fileManager).setSymbolFileEnabled(false);
JavaCompiler c = ToolProvider.getSystemJavaCompiler();
List opts = new ArrayList<>();
opts.add("-proc:only");
opts.addAll(javac_extras);
CompilationTask t;
try {
t = c.getTask(log, fileManager, diagnosticListener, opts, classes, null);
} catch (IllegalArgumentException e) {
util.error("bad.arg", e.getMessage());
return false;
}
JavahProcessor p = new JavahProcessor(g);
t.setProcessors(Collections.singleton(p));
boolean ok = t.call();
if (p.exit != null)
throw new Util.Exit(p.exit);
return ok;
}
static StandardJavaFileManager getDefaultFileManager(final DiagnosticListener dl, PrintWriter log) {
return JavahFileManager.create(dl, log);
}
private void showHelp() {
log.println(getMessage("main.usage", progname));
for (Option o: recognizedOptions) {
if (o.isHidden())
continue;
String name = o.aliases[0].substring(1); // there must always be at least one name
log.println(getMessage("main.opt." + name));
}
String[] fmOptions = {
"--module-path", "--system",
"--class-path", "-classpath", "-cp",
"-bootclasspath"
};
for (String o: fmOptions) {
if (fileManager.isSupportedOption(o) == -1)
continue;
String name = o.replaceAll("^-+", "").replaceAll("-+", "_");
log.println(getMessage("main.opt." + name));
}
log.println(getMessage("main.usage.foot"));
}
private void showVersion(boolean full) {
log.println(version(full));
}
private static final String versionRBName = "com.sun.tools.javah.resources.version";
private static ResourceBundle versionRB;
private String version(boolean full) {
String msgKey = (full ? "javah.fullVersion" : "javah.version");
String versionKey = (full ? "full" : "release");
// versionKey=product: mm.nn.oo[-milestone]
// versionKey=full: mm.mm.oo[-milestone]-build
if (versionRB == null) {
try {
versionRB = ResourceBundle.getBundle(versionRBName);
} catch (MissingResourceException e) {
return getMessage("version.resource.missing", System.getProperty("java.version"));
}
}
try {
return getMessage(msgKey, "javah", versionRB.getString(versionKey));
}
catch (MissingResourceException e) {
return getMessage("version.unknown", System.getProperty("java.version"));
}
}
private Diagnostic createDiagnostic(final String key, final Object... args) {
return new Diagnostic() {
@DefinedBy(Api.COMPILER)
public Kind getKind() {
return Diagnostic.Kind.ERROR;
}
@DefinedBy(Api.COMPILER)
public JavaFileObject getSource() {
return null;
}
@DefinedBy(Api.COMPILER)
public long getPosition() {
return Diagnostic.NOPOS;
}
@DefinedBy(Api.COMPILER)
public long getStartPosition() {
return Diagnostic.NOPOS;
}
@DefinedBy(Api.COMPILER)
public long getEndPosition() {
return Diagnostic.NOPOS;
}
@DefinedBy(Api.COMPILER)
public long getLineNumber() {
return Diagnostic.NOPOS;
}
@DefinedBy(Api.COMPILER)
public long getColumnNumber() {
return Diagnostic.NOPOS;
}
@DefinedBy(Api.COMPILER)
public String getCode() {
return key;
}
@DefinedBy(Api.COMPILER)
public String getMessage(Locale locale) {
return JavahTask.this.getMessage(locale, key, args);
}
};
}
private String getMessage(String key, Object... args) {
return getMessage(task_locale, key, args);
}
private String getMessage(Locale locale, String key, Object... args) {
if (bundles == null) {
// could make this a HashMap>
// and for efficiency, keep a hard reference to the bundle for the task
// locale
bundles = new HashMap<>();
}
if (locale == null)
locale = Locale.getDefault();
ResourceBundle b = bundles.get(locale);
if (b == null) {
try {
b = ResourceBundle.getBundle("com.sun.tools.javah.resources.l10n", locale);
bundles.put(locale, b);
} catch (MissingResourceException e) {
throw new InternalError("Cannot find javah resource bundle for locale " + locale, e);
}
}
try {
return MessageFormat.format(b.getString(key), args);
} catch (MissingResourceException e) {
return key;
//throw new InternalError(e, key);
}
}
File ofile;
File odir;
String bootcp;
String usercp;
List classes;
boolean verbose;
boolean noArgs;
boolean help;
boolean trace;
boolean version;
boolean fullVersion;
boolean jni;
boolean llni;
boolean doubleAlign;
boolean force;
Set javac_extras = new LinkedHashSet<>();
PrintWriter log;
JavaFileManager fileManager;
DiagnosticListener diagnosticListener;
Locale task_locale;
Map bundles;
private static final String progname = "javah";
@SupportedAnnotationTypes("*")
class JavahProcessor extends AbstractProcessor {
private Messager messager;
JavahProcessor(Gen g) {
this.g = g;
}
@Override @DefinedBy(Api.ANNOTATION_PROCESSING)
public SourceVersion getSupportedSourceVersion() {
// since this is co-bundled with javac, we can assume it supports
// the latest source version
return SourceVersion.latest();
}
@Override @DefinedBy(Api.ANNOTATION_PROCESSING)
public void init(ProcessingEnvironment pEnv) {
super.init(pEnv);
messager = processingEnv.getMessager();
}
@DefinedBy(Api.ANNOTATION_PROCESSING)
public boolean process(Set annotations, RoundEnvironment roundEnv) {
try {
Set classes = getAllClasses(ElementFilter.typesIn(roundEnv.getRootElements()));
if (classes.size() > 0) {
checkMethodParameters(classes);
g.setProcessingEnvironment(processingEnv);
g.setClasses(classes);
g.run();
}
} catch (CompletionFailure cf) {
messager.printMessage(ERROR, getMessage("class.not.found", cf.sym.getQualifiedName().toString()));
} catch (ClassNotFoundException cnfe) {
messager.printMessage(ERROR, getMessage("class.not.found", cnfe.getMessage()));
} catch (IOException ioe) {
messager.printMessage(ERROR, getMessage("io.exception", ioe.getMessage()));
} catch (Util.Exit e) {
exit = e;
}
return true;
}
private Set getAllClasses(Set classes) {
Set allClasses = new LinkedHashSet<>();
getAllClasses0(classes, allClasses);
return allClasses;
}
private void getAllClasses0(Iterable classes, Set allClasses) {
for (TypeElement c: classes) {
allClasses.add(c);
getAllClasses0(ElementFilter.typesIn(c.getEnclosedElements()), allClasses);
}
}
// 4942232:
// check that classes exist for all the parameters of native methods
private void checkMethodParameters(Set classes) {
Types types = processingEnv.getTypeUtils();
for (TypeElement te: classes) {
for (ExecutableElement ee: ElementFilter.methodsIn(te.getEnclosedElements())) {
for (VariableElement ve: ee.getParameters()) {
TypeMirror tm = ve.asType();
checkMethodParametersVisitor.visit(tm, types);
}
}
}
}
private TypeVisitor checkMethodParametersVisitor =
new SimpleTypeVisitor9() {
@Override @DefinedBy(Api.LANGUAGE_MODEL)
public Void visitArray(ArrayType t, Types types) {
visit(t.getComponentType(), types);
return null;
}
@Override @DefinedBy(Api.LANGUAGE_MODEL)
public Void visitDeclared(DeclaredType t, Types types) {
t.asElement().getKind(); // ensure class exists
for (TypeMirror st: types.directSupertypes(t))
visit(st, types);
return null;
}
};
private Gen g;
private Util.Exit exit;
}
}