--- old/src/java.base/share/classes/jdk/internal/module/ClassFileAttributes.java Fri Oct 27 09:25:45 2017 +++ /dev/null Fri Oct 27 09:25:45 2017 @@ -1,765 +0,0 @@ -/* - * 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 - * 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 jdk.internal.module; - -import java.lang.module.ModuleDescriptor; -import java.lang.module.ModuleDescriptor.Builder; -import java.lang.module.ModuleDescriptor.Requires; -import java.lang.module.ModuleDescriptor.Exports; -import java.lang.module.ModuleDescriptor.Opens; -import java.lang.module.ModuleDescriptor.Provides; -import java.lang.module.ModuleDescriptor.Version; -import java.util.ArrayList; -import java.util.Collections; -import java.util.HashMap; -import java.util.HashSet; -import java.util.List; -import java.util.Map; -import java.util.Set; - -import jdk.internal.misc.JavaLangModuleAccess; -import jdk.internal.misc.SharedSecrets; -import jdk.internal.org.objectweb.asm.Attribute; -import jdk.internal.org.objectweb.asm.ByteVector; -import jdk.internal.org.objectweb.asm.ClassReader; -import jdk.internal.org.objectweb.asm.ClassWriter; -import jdk.internal.org.objectweb.asm.Label; -import static jdk.internal.module.ClassFileConstants.*; - - -/** - * Provides ASM implementations of {@code Attribute} to read and write the - * class file attributes in a module-info class file. - */ - -public final class ClassFileAttributes { - - private ClassFileAttributes() { } - - /** - * Module_attribute { - * // See lang-vm.html for details. - * } - */ - public static class ModuleAttribute extends Attribute { - private static final JavaLangModuleAccess JLMA - = SharedSecrets.getJavaLangModuleAccess(); - - private ModuleDescriptor descriptor; - private Version replacementVersion; - - public ModuleAttribute(ModuleDescriptor descriptor) { - super(MODULE); - this.descriptor = descriptor; - } - - public ModuleAttribute(Version v) { - super(MODULE); - this.replacementVersion = v; - } - - public ModuleAttribute() { - super(MODULE); - } - - @Override - protected Attribute read(ClassReader cr, - int off, - int len, - char[] buf, - int codeOff, - Label[] labels) - { - // module_name (CONSTANT_Module_info) - String mn = cr.readModule(off, buf); - off += 2; - - // module_flags - int module_flags = cr.readUnsignedShort(off); - off += 2; - - Set modifiers = new HashSet<>(); - if ((module_flags & ACC_OPEN) != 0) - modifiers.add(ModuleDescriptor.Modifier.OPEN); - if ((module_flags & ACC_SYNTHETIC) != 0) - modifiers.add(ModuleDescriptor.Modifier.SYNTHETIC); - if ((module_flags & ACC_MANDATED) != 0) - modifiers.add(ModuleDescriptor.Modifier.MANDATED); - - Builder builder = JLMA.newModuleBuilder(mn, false, modifiers); - - // module_version - String module_version = cr.readUTF8(off, buf); - off += 2; - if (replacementVersion != null) { - builder.version(replacementVersion); - } else if (module_version != null) { - builder.version(module_version); - } - - // requires_count and requires[requires_count] - int requires_count = cr.readUnsignedShort(off); - off += 2; - for (int i=0; i mods; - if (requires_flags == 0) { - mods = Collections.emptySet(); - } else { - mods = new HashSet<>(); - if ((requires_flags & ACC_TRANSITIVE) != 0) - mods.add(Requires.Modifier.TRANSITIVE); - if ((requires_flags & ACC_STATIC_PHASE) != 0) - mods.add(Requires.Modifier.STATIC); - if ((requires_flags & ACC_SYNTHETIC) != 0) - mods.add(Requires.Modifier.SYNTHETIC); - if ((requires_flags & ACC_MANDATED) != 0) - mods.add(Requires.Modifier.MANDATED); - } - - // requires_version - String requires_version = cr.readUTF8(off, buf); - off += 2; - if (requires_version == null) { - builder.requires(mods, dn); - } else { - JLMA.requires(builder, mods, dn, requires_version); - } - } - - // exports_count and exports[exports_count] - int exports_count = cr.readUnsignedShort(off); - off += 2; - if (exports_count > 0) { - for (int i=0; i mods; - if (exports_flags == 0) { - mods = Collections.emptySet(); - } else { - mods = new HashSet<>(); - if ((exports_flags & ACC_SYNTHETIC) != 0) - mods.add(Exports.Modifier.SYNTHETIC); - if ((exports_flags & ACC_MANDATED) != 0) - mods.add(Exports.Modifier.MANDATED); - } - - int exports_to_count = cr.readUnsignedShort(off); - off += 2; - if (exports_to_count > 0) { - Set targets = new HashSet<>(); - for (int j=0; j 0) { - for (int i=0; i mods; - if (opens_flags == 0) { - mods = Collections.emptySet(); - } else { - mods = new HashSet<>(); - if ((opens_flags & ACC_SYNTHETIC) != 0) - mods.add(Opens.Modifier.SYNTHETIC); - if ((opens_flags & ACC_MANDATED) != 0) - mods.add(Opens.Modifier.MANDATED); - } - - int opens_to_count = cr.readUnsignedShort(off); - off += 2; - if (opens_to_count > 0) { - Set targets = new HashSet<>(); - for (int j=0; j 0) { - for (int i=0; i 0) { - for (int i=0; i providers = new ArrayList<>(); - for (int j=0; j modifiers = descriptor.modifiers(); - int module_flags = 0; - if (modifiers.contains(ModuleDescriptor.Modifier.OPEN)) - module_flags |= ACC_OPEN; - if (modifiers.contains(ModuleDescriptor.Modifier.SYNTHETIC)) - module_flags |= ACC_SYNTHETIC; - if (modifiers.contains(ModuleDescriptor.Modifier.MANDATED)) - module_flags |= ACC_MANDATED; - attr.putShort(module_flags); - - // module_version - String vs = descriptor.rawVersion().orElse(null); - if (vs == null) { - attr.putShort(0); - } else { - int module_version_index = cw.newUTF8(vs); - attr.putShort(module_version_index); - } - - // requires_count - attr.putShort(descriptor.requires().size()); - - // requires[requires_count] - for (Requires r : descriptor.requires()) { - int requires_index = cw.newModule(r.name()); - attr.putShort(requires_index); - - int requires_flags = 0; - if (r.modifiers().contains(Requires.Modifier.TRANSITIVE)) - requires_flags |= ACC_TRANSITIVE; - if (r.modifiers().contains(Requires.Modifier.STATIC)) - requires_flags |= ACC_STATIC_PHASE; - if (r.modifiers().contains(Requires.Modifier.SYNTHETIC)) - requires_flags |= ACC_SYNTHETIC; - if (r.modifiers().contains(Requires.Modifier.MANDATED)) - requires_flags |= ACC_MANDATED; - attr.putShort(requires_flags); - - int requires_version_index; - vs = r.rawCompiledVersion().orElse(null); - if (vs == null) { - requires_version_index = 0; - } else { - requires_version_index = cw.newUTF8(vs); - } - attr.putShort(requires_version_index); - } - - // exports_count and exports[exports_count]; - attr.putShort(descriptor.exports().size()); - for (Exports e : descriptor.exports()) { - String pkg = e.source().replace('.', '/'); - attr.putShort(cw.newPackage(pkg)); - - int exports_flags = 0; - if (e.modifiers().contains(Exports.Modifier.SYNTHETIC)) - exports_flags |= ACC_SYNTHETIC; - if (e.modifiers().contains(Exports.Modifier.MANDATED)) - exports_flags |= ACC_MANDATED; - attr.putShort(exports_flags); - - if (e.isQualified()) { - Set ts = e.targets(); - attr.putShort(ts.size()); - ts.forEach(target -> attr.putShort(cw.newModule(target))); - } else { - attr.putShort(0); - } - } - - // opens_counts and opens[opens_counts] - attr.putShort(descriptor.opens().size()); - for (Opens obj : descriptor.opens()) { - String pkg = obj.source().replace('.', '/'); - attr.putShort(cw.newPackage(pkg)); - - int opens_flags = 0; - if (obj.modifiers().contains(Opens.Modifier.SYNTHETIC)) - opens_flags |= ACC_SYNTHETIC; - if (obj.modifiers().contains(Opens.Modifier.MANDATED)) - opens_flags |= ACC_MANDATED; - attr.putShort(opens_flags); - - if (obj.isQualified()) { - Set ts = obj.targets(); - attr.putShort(ts.size()); - ts.forEach(target -> attr.putShort(cw.newModule(target))); - } else { - attr.putShort(0); - } - } - - // uses_count and uses_index[uses_count] - if (descriptor.uses().isEmpty()) { - attr.putShort(0); - } else { - attr.putShort(descriptor.uses().size()); - for (String s : descriptor.uses()) { - String service = s.replace('.', '/'); - int index = cw.newClass(service); - attr.putShort(index); - } - } - - // provides_count and provides[provides_count] - if (descriptor.provides().isEmpty()) { - attr.putShort(0); - } else { - attr.putShort(descriptor.provides().size()); - for (Provides p : descriptor.provides()) { - String service = p.service().replace('.', '/'); - attr.putShort(cw.newClass(service)); - int with_count = p.providers().size(); - attr.putShort(with_count); - for (String provider : p.providers()) { - attr.putShort(cw.newClass(provider.replace('.', '/'))); - } - } - } - - return attr; - } - } - - /** - * ModulePackages attribute. - * - * 
 {@code
-     *
-     * ModulePackages_attribute {
-     *   // index to CONSTANT_utf8_info structure in constant pool representing
-     *   // the string "ModulePackages"
-     *   u2 attribute_name_index;
-     *   u4 attribute_length;
-     *
-     *   // the number of entries in the packages table
-     *   u2 packages_count;
-     *   { // index to CONSTANT_Package_info structure with the package name
-     *     u2 package_index
-     *   } packages[package_count];
-     *
-     * }
- */ - public static class ModulePackagesAttribute extends Attribute { - private final Set packages; - - public ModulePackagesAttribute(Set packages) { - super(MODULE_PACKAGES); - this.packages = packages; - } - - public ModulePackagesAttribute() { - this(null); - } - - @Override - protected Attribute read(ClassReader cr, - int off, - int len, - char[] buf, - int codeOff, - Label[] labels) - { - // package count - int package_count = cr.readUnsignedShort(off); - off += 2; - - // packages - Set packages = new HashSet<>(); - for (int i=0; i p.replace('.', '/')) - .forEach(p -> attr.putShort(cw.newPackage(p))); - - return attr; - } - - } - - /** - * ModuleMainClass attribute. - * - * 
 {@code
-     *
-     * MainClass_attribute {
-     *   // index to CONSTANT_utf8_info structure in constant pool representing
-     *   // the string "ModuleMainClass"
-     *   u2 attribute_name_index;
-     *   u4 attribute_length;
-     *
-     *   // index to CONSTANT_Class_info structure with the main class name
-     *   u2 main_class_index;
-     * }
-     *
-     * }
- */ - public static class ModuleMainClassAttribute extends Attribute { - private final String mainClass; - - public ModuleMainClassAttribute(String mainClass) { - super(MODULE_MAIN_CLASS); - this.mainClass = mainClass; - } - - public ModuleMainClassAttribute() { - this(null); - } - - @Override - protected Attribute read(ClassReader cr, - int off, - int len, - char[] buf, - int codeOff, - Label[] labels) - { - String value = cr.readClass(off, buf).replace('/', '.'); - return new ModuleMainClassAttribute(value); - } - - @Override - protected ByteVector write(ClassWriter cw, - byte[] code, - int len, - int maxStack, - int maxLocals) - { - ByteVector attr = new ByteVector(); - int index = cw.newClass(mainClass.replace('.', '/')); - attr.putShort(index); - return attr; - } - } - - /** - * ModuleTarget attribute. - * - * 
 {@code
-     *
-     * TargetPlatform_attribute {
-     *   // index to CONSTANT_utf8_info structure in constant pool representing
-     *   // the string "ModuleTarget"
-     *   u2 attribute_name_index;
-     *   u4 attribute_length;
-     *
-     *   // index to CONSTANT_utf8_info structure with the target platform
-     *   u2 target_platform_index;
-     * }
-     *
-     * }
- */ - public static class ModuleTargetAttribute extends Attribute { - private final String targetPlatform; - - public ModuleTargetAttribute(String targetPlatform) { - super(MODULE_TARGET); - this.targetPlatform = targetPlatform; - } - - public ModuleTargetAttribute() { - this(null); - } - - public String targetPlatform() { - return targetPlatform; - } - - @Override - protected Attribute read(ClassReader cr, - int off, - int len, - char[] buf, - int codeOff, - Label[] labels) - { - - String targetPlatform = null; - - int target_platform_index = cr.readUnsignedShort(off); - if (target_platform_index != 0) - targetPlatform = cr.readUTF8(off, buf); - off += 2; - - return new ModuleTargetAttribute(targetPlatform); - } - - @Override - protected ByteVector write(ClassWriter cw, - byte[] code, - int len, - int maxStack, - int maxLocals) - { - ByteVector attr = new ByteVector(); - - int target_platform_index = 0; - if (targetPlatform != null && targetPlatform.length() > 0) - target_platform_index = cw.newUTF8(targetPlatform); - attr.putShort(target_platform_index); - - return attr; - } - } - - /** - * ModuleHashes attribute. - * - * 
 {@code
-     *
-     * ModuleHashes_attribute {
-     *   // index to CONSTANT_utf8_info structure in constant pool representing
-     *   // the string "ModuleHashes"
-     *   u2 attribute_name_index;
-     *   u4 attribute_length;
-     *
-     *   // index to CONSTANT_utf8_info structure with algorithm name
-     *   u2 algorithm_index;
-     *
-     *   // the number of entries in the hashes table
-     *   u2 hashes_count;
-     *   {   u2 module_name_index (index to CONSTANT_Module_info structure)
-     *       u2 hash_length;
-     *       u1 hash[hash_length];
-     *   } hashes[hashes_count];
-     *
-     * }
- */ - static class ModuleHashesAttribute extends Attribute { - private final ModuleHashes hashes; - - ModuleHashesAttribute(ModuleHashes hashes) { - super(MODULE_HASHES); - this.hashes = hashes; - } - - ModuleHashesAttribute() { - this(null); - } - - @Override - protected Attribute read(ClassReader cr, - int off, - int len, - char[] buf, - int codeOff, - Label[] labels) - { - String algorithm = cr.readUTF8(off, buf); - off += 2; - - int hashes_count = cr.readUnsignedShort(off); - off += 2; - - Map map = new HashMap<>(); - for (int i=0; i names = hashes.names(); - attr.putShort(names.size()); - - for (String mn : names) { - byte[] hash = hashes.hashFor(mn); - assert hash != null; - attr.putShort(cw.newModule(mn)); - - attr.putShort(hash.length); - for (byte b: hash) { - attr.putByte(b); - } - } - - return attr; - } - } - - /** - * ModuleResolution_attribute { - * u2 attribute_name_index; // "ModuleResolution" - * u4 attribute_length; // 2 - * u2 resolution_flags; - * - * The value of the resolution_flags item is a mask of flags used to denote - * properties of module resolution. The flags are as follows: - * - * // Optional - * 0x0001 (DO_NOT_RESOLVE_BY_DEFAULT) - * - * // At most one of: - * 0x0002 (WARN_DEPRECATED) - * 0x0004 (WARN_DEPRECATED_FOR_REMOVAL) - * 0x0008 (WARN_INCUBATING) - */ - static class ModuleResolutionAttribute extends Attribute { - private final int value; - - ModuleResolutionAttribute() { - super(MODULE_RESOLUTION); - value = 0; - } - - ModuleResolutionAttribute(int value) { - super(MODULE_RESOLUTION); - this.value = value; - } - - @Override - protected Attribute read(ClassReader cr, - int off, - int len, - char[] buf, - int codeOff, - Label[] labels) - { - int flags = cr.readUnsignedShort(off); - return new ModuleResolutionAttribute(flags); - } - - @Override - protected ByteVector write(ClassWriter cw, - byte[] code, - int len, - int maxStack, - int maxLocals) - { - ByteVector attr = new ByteVector(); - attr.putShort(value); - return attr; - } - } -}