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src/jdk.jlink/share/classes/jdk/tools/jlink/internal/plugins/SystemModulesPlugin.java
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@@ -1,7 +1,7 @@
/*
- * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 2017, 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
@@ -44,15 +44,20 @@
import java.util.Set;
import java.util.TreeSet;
import java.util.function.IntSupplier;
import jdk.internal.module.Checks;
+import jdk.internal.module.ClassFileAttributes;
+import jdk.internal.module.ClassFileConstants;
import jdk.internal.module.ModuleHashes;
import jdk.internal.module.ModuleInfo.Attributes;
import jdk.internal.module.ModuleInfoExtender;
import jdk.internal.module.ModuleResolution;
import jdk.internal.module.SystemModules;
+import jdk.internal.org.objectweb.asm.Attribute;
+import jdk.internal.org.objectweb.asm.ClassReader;
+import jdk.internal.org.objectweb.asm.ClassVisitor;
import jdk.internal.org.objectweb.asm.ClassWriter;
import jdk.internal.org.objectweb.asm.MethodVisitor;
import jdk.internal.org.objectweb.asm.Opcodes;
import static jdk.internal.org.objectweb.asm.Opcodes.*;
@@ -107,10 +112,15 @@
public boolean hasArguments() {
return true;
}
@Override
+ public String getArgumentsDescription() {
+ return PluginsResourceBundle.getArgument(NAME);
+ }
+
+ @Override
public void configure(Map<String, String> config) {
String arg = config.get(NAME);
if (arg != null) {
if (arg.equals("retainModuleTarget")) {
retainModuleTarget = true;
@@ -169,30 +179,37 @@
return out.build();
}
static class ModuleInfo {
+ private final ByteArrayInputStream bain;
private final Attributes attrs;
private final Set<String> packages;
- private final ByteArrayInputStream bain;
private final boolean dropModuleTarget;
+ private final boolean addModulePackages;
private ModuleDescriptor descriptor; // may be different that the original one
ModuleInfo(byte[] bytes, Set<String> packages, boolean dropModuleTarget)
throws IOException
{
this.bain = new ByteArrayInputStream(bytes);
this.packages = packages;
-
this.attrs = jdk.internal.module.ModuleInfo.read(bain, null);
+ // If ModulePackages attribute is present, the packages from this
+ // module descriptor returns the packages in that attribute.
+ // If it's not present, ModuleDescriptor::packages only contains
+ // the exported and open packages from module-info.class
this.descriptor = attrs.descriptor();
if (descriptor.isAutomatic()) {
throw new InternalError("linking automatic module is not supported");
}
- if (dropModuleTarget) {
+ // add ModulePackages attribute if this module contains some packages
+ // and ModulePackages is not present
+ this.addModulePackages = packages.size() > 0 && !hasModulePackages();
// drop target attribute only if any OS property is present
+ if (dropModuleTarget) {
this.dropModuleTarget =
descriptor.osName().isPresent() ||
descriptor.osArch().isPresent() ||
descriptor.osVersion().isPresent();
} else {
@@ -274,57 +291,75 @@
throw new PluginException("Packages that are exported or open in "
+ descriptor.name() + " are not present: " + nonExistPackages);
}
}
+ boolean hasModulePackages() throws IOException {
+ Set<String> attrTypes = new HashSet<>();
+ ClassVisitor cv = new ClassVisitor(Opcodes.ASM5) {
+ @Override
+ public void visitAttribute(Attribute attr) {
+ attrTypes.add(attr.type);
+ }
+ };
+
+ // prototype of attributes that should be parsed
+ Attribute[] attrs = new Attribute[] {
+ new ClassFileAttributes.ModulePackagesAttribute()
+ };
+
+ try (InputStream in = getInputStream()) {
+ // parse module-info.class
+ ClassReader cr = new ClassReader(in);
+ cr.accept(cv, attrs, 0);
+ return attrTypes.contains(ClassFileConstants.MODULE_PACKAGES);
+ }
+ }
+
/**
* Returns true if module-info.class should be written
* 1. add ModulePackages attribute if not present; or
* 2. drop ModuleTarget attribute except java.base
*/
boolean shouldRewrite() {
- return shouldAddModulePackages() || shouldDropModuleTarget();
- }
-
- boolean shouldAddModulePackages() {
- return (descriptor.packages().isEmpty() && packages.size() > 0);
- }
-
- boolean shouldDropModuleTarget() {
- return dropModuleTarget &&
- (descriptor.osName().isPresent() ||
- descriptor.osArch().isPresent() ||
- descriptor.osVersion().isPresent());
+ return addModulePackages || dropModuleTarget;
}
/**
* Returns the bytes for the module-info.class with ModulePackages
- * if it contains at least one package
+ * attribute added and/or with ModuleTarget attribute dropped.
*/
byte[] getBytes() throws IOException {
- bain.reset();
-
- // add ModulePackages attribute if not exist
+ try (InputStream in = getInputStream()) {
if (shouldRewrite()) {
- ModuleInfoRewriter rewriter = new ModuleInfoRewriter(bain);
- if (shouldAddModulePackages()) {
+ ModuleInfoRewriter rewriter = new ModuleInfoRewriter(in);
+ if (addModulePackages) {
rewriter.addModulePackages(packages);
}
- if (shouldDropModuleTarget()) {
+ if (dropModuleTarget) {
rewriter.dropModuleTarget();
}
// rewritten module descriptor
byte[] bytes = rewriter.getBytes();
try (ByteArrayInputStream bain = new ByteArrayInputStream(bytes)) {
this.descriptor = ModuleDescriptor.read(bain);
}
return bytes;
} else {
- return bain.readAllBytes();
+ return in.readAllBytes();
+ }
}
}
+ /*
+ * Returns the input stream of the module-info.class
+ */
+ InputStream getInputStream() {
+ bain.reset();
+ return bain;
+ }
+
class ModuleInfoRewriter extends ByteArrayOutputStream {
final ModuleInfoExtender extender;
ModuleInfoRewriter(InputStream in) {
this.extender = ModuleInfoExtender.newExtender(in);
}
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