--- old/src/share/vm/classfile/classFileParser.cpp 2017-03-03 09:15:06.621847486 -0500
+++ new/src/share/vm/classfile/classFileParser.cpp 2017-03-03 09:15:06.460257463 -0500
@@ -105,6 +105,12 @@
#define JAVA_9_VERSION 53
+void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
+ assert((bad_constant == 19 || bad_constant == 20) && _major_version >= JAVA_9_VERSION,
+ "Unexpected bad constant pool entry");
+ if (_bad_constant_seen == 0) _bad_constant_seen = bad_constant;
+}
+
void ClassFileParser::parse_constant_pool_entries(const ClassFileStream* const stream,
ConstantPool* cp,
const int length,
@@ -302,6 +308,18 @@
}
break;
}
+ case 19:
+ case 20: {
+ // Record that an error occured in these two cases but keep parsing so
+ // that ACC_Module can be checked for in the access_flags. Need to
+ // throw NoClassDefFoundError in that case.
+ if (_major_version >= JAVA_9_VERSION) {
+ cfs->guarantee_more(3, CHECK);
+ cfs->get_u2_fast();
+ set_class_bad_constant_seen(tag);
+ break;
+ }
+ }
default: {
classfile_parse_error("Unknown constant tag %u in class file %s",
tag,
@@ -359,14 +377,24 @@
#endif
void ClassFileParser::parse_constant_pool(const ClassFileStream* const stream,
- ConstantPool* const cp,
- const int length,
- TRAPS) {
+ ConstantPool* const cp,
+ const int length,
+ TRAPS) {
assert(cp != NULL, "invariant");
assert(stream != NULL, "invariant");
// parsing constant pool entries
parse_constant_pool_entries(stream, cp, length, CHECK);
+ short bad_constant = class_bad_constant_seen();
+ if (bad_constant != 0) {
+ // Either a CONSTANT_Module or CONSTANT_Package entry was found in the constant
+ // pool. So, stop parsing and return. The caller will decide whether to throw
+ // NCDFE if it finds ACC_MODULE in the class's access_flags or throw CFE for
+ // the bad constant pool entry.
+ assert((bad_constant == 19 || bad_constant == 20) && _major_version >= JAVA_9_VERSION,
+ "Unexpected bad constant pool entry");
+ return;
+ }
int index = 1; // declared outside of loops for portability
@@ -5558,6 +5586,7 @@
_protection_domain(protection_domain),
_access_flags(),
_pub_level(pub_level),
+ _bad_constant_seen(0),
_synthetic_flag(false),
_sde_length(false),
_sde_buffer(NULL),
@@ -5765,8 +5794,14 @@
verify_legal_class_modifiers(flags, CHECK);
- _access_flags.set_flags(flags);
+ short bad_constant = class_bad_constant_seen();
+ if (bad_constant != 0) {
+ // Do not throw CFE until after the access_flags are checked because if
+ // ACC_MODULE is set in the access flags, then NCDFE must be thrown, not CFE.
+ classfile_parse_error("Unknown constant tag %u in class file %s", bad_constant, CHECK);
+ }
+ _access_flags.set_flags(flags);
// This class and superclass
_this_class_index = stream->get_u2_fast();
--- old/src/share/vm/classfile/classFileParser.hpp 2017-03-03 09:15:07.213765930 -0500
+++ new/src/share/vm/classfile/classFileParser.hpp 2017-03-03 09:15:07.070274219 -0500
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 1997, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1997, 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
@@ -122,6 +122,15 @@
// for tracing and notifications
Publicity _pub_level;
+ // Used to keep track of whether a constant pool item 19 or 20 is found. These
+ // correspond to CONSTANT_Module and CONSTANT_Package tags and are not allowed
+ // in regular class files. For class file version >= 53, a CFE cannot be thrown
+ // immediately when these are seen because a NCDFE must be thrown if the class's
+ // access_flags have ACC_MODULE set. But, the access_flags haven't been looked
+ // at yet. So, the bad constant pool item is cached here. A value of zero
+ // means that no constant pool item 19 or 20 was found.
+ short _bad_constant_seen;
+
// class attributes parsed before the instance klass is created:
bool _synthetic_flag;
int _sde_length;
@@ -161,6 +170,8 @@
void fill_instance_klass(InstanceKlass* ik, bool cf_changed_in_CFLH, TRAPS);
void set_klass(InstanceKlass* instance);
+ void set_class_bad_constant_seen(short bad_constant);
+ short class_bad_constant_seen() { return _bad_constant_seen; }
void set_class_synthetic_flag(bool x) { _synthetic_flag = x; }
void set_class_sourcefile_index(u2 x) { _sourcefile_index = x; }
void set_class_generic_signature_index(u2 x) { _generic_signature_index = x; }
--- /dev/null 2016-12-31 18:50:47.837000228 -0500
+++ new/test/runtime/constantPool/ACCModule52.java 2017-03-03 09:15:07.632981912 -0500
@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 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.
+ *
+ * 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.
+ */
+
+import jdk.internal.org.objectweb.asm.*;
+
+/*
+ * @test
+ * @summary Test that the JVM ignores ACC_MODULE if it is set for a version
+ * 52 class file.
+ * @bug 8175383
+ * @library /test/lib
+ * @modules java.base/jdk.internal.org.objectweb.asm
+ * @compile -XDignore.symbol.file ACCModule52.java
+ * @run main ACCModule52
+ */
+
+public class ACCModule52 {
+
+ static final String CLASS_NAME = "ACCModule52Pkg";
+
+ public static void main(String[] args) throws Exception {
+ int ACC_MODULE = 0x8000;
+ ClassWriter cw = new ClassWriter(0);
+ cw.visit(Opcodes.V1_8,
+ Opcodes.ACC_INTERFACE + Opcodes.ACC_ABSTRACT + Opcodes.ACC_SYNTHETIC + ACC_MODULE,
+ CLASS_NAME,
+ null,
+ "java/lang/Object",
+ null);
+
+ cw.visitEnd();
+ byte[] bytes = cw.toByteArray();
+
+
+ ClassLoader loader = new ClassLoader(ACCModule52.class.getClassLoader()) {
+ @Override
+ protected Class findClass(String cn)throws ClassNotFoundException {
+ if (cn.equals(CLASS_NAME)) {
+ Class superClass = super.defineClass(cn, bytes, 0, bytes.length);
+ } else {
+ throw new ClassNotFoundException(cn);
+ }
+ return null;
+ }
+ };
+
+ Class clazz = loader.loadClass(CLASS_NAME);
+ }
+}
--- /dev/null 2016-12-31 18:50:47.837000228 -0500
+++ new/test/runtime/constantPool/ConstModule.java 2017-03-03 09:15:08.091793058 -0500
@@ -0,0 +1,255 @@
+/*
+ * Copyright (c) 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.
+ *
+ * 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.
+ */
+
+import jdk.internal.org.objectweb.asm.*;
+
+/*
+ * @test
+ * @summary Test scenarios for constant pool CONSTANT_Module and CONSTANT_Package
+ * types, for class file versions 53 and 52, when ACC_MODULE is set and
+ * not set in the access_flags.
+ * @bug 8175383
+ * @library /test/lib
+ * @modules java.base/jdk.internal.org.objectweb.asm
+ * @compile -XDignore.symbol.file ConstModule.java
+ * @run main ConstModule
+ */
+
+public class ConstModule {
+
+ static final int ACC_MODULE = 0x8000;
+ static final boolean MODULE_TEST = true;
+ static final boolean PACKAGE_TEST = false;
+ static final boolean CFE_EXCEPTION = true;
+ static final boolean NCDFE_EXCEPTION = false;
+
+ public static void main(String[] args) throws Exception {
+
+ // Test that the JVM throws CFE for constant pool CONSTANT_Module type, for
+ // class file version 53, when ACC_MODULE is not set in the access_flags.
+ ConstModule.write_and_load(Opcodes.V1_9,
+ Opcodes.ACC_INTERFACE + Opcodes.ACC_ABSTRACT + Opcodes.ACC_SYNTHETIC,
+ "jdk.fooMod", "FooMod", MODULE_TEST, CFE_EXCEPTION);
+
+ // Test that the JVM throws NCDFE for constant pool CONSTANT_Module type,
+ // for class file version 53, when ACC_MODULE is set in the access_flags.
+ ConstModule.write_and_load(Opcodes.V1_9,
+ Opcodes.ACC_INTERFACE + Opcodes.ACC_ABSTRACT + Opcodes.ACC_SYNTHETIC + ACC_MODULE,
+ "jdk.fooModACC", "FooModACC", MODULE_TEST, NCDFE_EXCEPTION);
+
+ // Test that the JVM throws CFE for constant pool CONSTANT_Module type, for
+ // class file version 52, even when ACC_MODULE is set in the access_flags.
+ ConstModule.write_and_load(Opcodes.V1_8,
+ Opcodes.ACC_INTERFACE + Opcodes.ACC_ABSTRACT + Opcodes.ACC_SYNTHETIC + ACC_MODULE,
+ "jdk.fooModACC52", "FooModACC52", MODULE_TEST, CFE_EXCEPTION);
+
+ // Test that the JVM throws CFE for constant pool CONSTANT_Package type, for
+ // class file version 53, when ACC_MODULE is not set in the access_flags.
+ ConstModule.write_and_load(Opcodes.V1_9,
+ Opcodes.ACC_INTERFACE + Opcodes.ACC_ABSTRACT + Opcodes.ACC_SYNTHETIC,
+ "jdk.fooPkg", "FooPkg", PACKAGE_TEST, CFE_EXCEPTION);
+
+ // Test that the JVM throws NCDFE for constant pool CONSTANT_Package type,
+ // for class file version 53, when ACC_MODULE is set in the access_flags.
+ ConstModule.write_and_load(Opcodes.V1_9,
+ Opcodes.ACC_INTERFACE + Opcodes.ACC_ABSTRACT + Opcodes.ACC_SYNTHETIC + ACC_MODULE,
+ "jdk.fooModACC", "FooModACC", PACKAGE_TEST, NCDFE_EXCEPTION);
+
+ // Test that the JVM throws CFE for constant pool CONSTANT_Package type, for
+ // class file version 52, even when ACC_MODULE is set in the access_flags.
+ ConstModule.write_and_load(Opcodes.V1_8,
+ Opcodes.ACC_INTERFACE + Opcodes.ACC_ABSTRACT + Opcodes.ACC_SYNTHETIC + ACC_MODULE,
+ "jdk.fooModACC52", "FooModACC52", PACKAGE_TEST, CFE_EXCEPTION);
+
+ }
+
+ public static void write_and_load(int version,
+ int access_flags,
+ String attr,
+ String class_name,
+ boolean module_test,
+ boolean throwCFE) throws Exception {
+ ClassWriter cw = new ClassWriter(0);
+ cw.visit(version,
+ access_flags,
+ class_name,
+ null,
+ "java/lang/Object",
+ null);
+
+ if (module_test)
+ cw.visitAttribute(new TestModuleAttribute(attr));
+ else
+ cw.visitAttribute(new TestPackageAttribute(attr));
+
+ cw.visitEnd();
+ byte[] bytes = cw.toByteArray();
+
+
+ ClassLoader loader = new ClassLoader(ConstModule.class.getClassLoader()) {
+ @Override
+ protected Class findClass(String cn)throws ClassNotFoundException {
+ if (cn.equals(class_name)) {
+ try {
+ Class superClass = super.defineClass(cn, bytes, 0, bytes.length);
+ throw new RuntimeException("Expected ClassFormatError not thrown");
+ } catch (java.lang.ClassFormatError e) {
+ if (!throwCFE) {
+ throw new RuntimeException("Unexpected ClassFormatError exception: " + e.getMessage());
+ }
+ if (module_test && !e.getMessage().contains(
+ "Unknown constant tag 19 in class file")) {
+ throw new RuntimeException("Wrong ClassFormatError exception: " + e.getMessage());
+ } else if (!module_test && !e.getMessage().contains(
+ "Unknown constant tag 20 in class file")) {
+ throw new RuntimeException("Wrong ClassFormatError exception: " + e.getMessage());
+ }
+ } catch (java.lang.NoClassDefFoundError f) {
+ if (throwCFE) {
+ throw new RuntimeException("Unexpected NoClassDefFoundError exception: " + f.getMessage());
+ }
+ if (!f.getMessage().contains(
+ "is not a class because access_flag ACC_MODULE is set")) {
+ throw new RuntimeException("Wrong NoClassDefFoundError exception: " + f.getMessage());
+ }
+ }
+ } else {
+ throw new ClassNotFoundException(cn);
+ }
+ return null;
+ }
+ };
+
+ Class clazz = loader.loadClass(class_name);
+ }
+
+ /**
+ * ConstModuleAttr attribute.
+ *
+ * {@code
+ *
+ * MainClass_attribute {
+ * // index to CONSTANT_utf8_info structure in constant pool representing
+ * // the string "ConstModuleAttr"
+ * u2 attribute_name_index;
+ * u4 attribute_length;
+ *
+ * // index to CONSTANT_Module_info structure
+ * u2 module_name_index
+ * }
+ *
+ * }
+ */
+ public static class TestModuleAttribute extends Attribute {
+ private final String moduleName;
+
+ public TestModuleAttribute(String moduleName) {
+ super("ConstModuleAttr");
+ this.moduleName = moduleName;
+ }
+
+ public TestModuleAttribute() {
+ this(null);
+ }
+
+ @Override
+ protected Attribute read(ClassReader cr,
+ int off,
+ int len,
+ char[] buf,
+ int codeOff,
+ Label[] labels)
+ {
+ String mn = cr.readModule(off, buf);
+ off += 2;
+ return new TestModuleAttribute(mn);
+ }
+
+ @Override
+ protected ByteVector write(ClassWriter cw,
+ byte[] code,
+ int len,
+ int maxStack,
+ int maxLocals)
+ {
+ ByteVector attr = new ByteVector();
+ attr.putShort(cw.newModule(moduleName));
+ return attr;
+ }
+ }
+
+ /**
+ * ConstPackageAttr attribute.
+ *
+ * {@code
+ *
+ * MainClass_attribute {
+ * // index to CONSTANT_utf8_info structure in constant pool representing
+ * // the string "ConstPackageAttr"
+ * u2 attribute_name_index;
+ * u4 attribute_length;
+ *
+ * // index to CONSTANT_Package_info structure
+ * u2 module_name_index
+ * }
+ *
+ * }
+ */
+ public static class TestPackageAttribute extends Attribute {
+ private final String packageName;
+
+ public TestPackageAttribute(String packageName) {
+ super("ConstPackageAttr");
+ this.packageName = packageName;
+ }
+
+ public TestPackageAttribute() {
+ this(null);
+ }
+
+ @Override
+ protected Attribute read(ClassReader cr,
+ int off,
+ int len,
+ char[] buf,
+ int codeOff,
+ Label[] labels)
+ {
+ String mn = cr.readPackage(off, buf);
+ off += 2;
+ return new TestPackageAttribute(mn);
+ }
+
+ @Override
+ protected ByteVector write(ClassWriter cw,
+ byte[] code,
+ int len,
+ int maxStack,
+ int maxLocals)
+ {
+ ByteVector attr = new ByteVector();
+ attr.putShort(cw.newPackage(packageName));
+ return attr;
+ }
+ }
+}