8240908: RetransformClass does not know about MethodParameters attribute
Reviewed-by: cjplummer, sspitsyn
This commit is contained in:
parent
1f92660937
commit
86c24b319e
src/hotspot/share/prims
test
jdk/java/lang/instrument
lib/jdk/test/lib/util
@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2005, 2021, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2005, 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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@ -287,6 +287,31 @@ void JvmtiClassFileReconstituter::write_exceptions_attribute(ConstMethod* const_
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}
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}
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// Write MethodParameters attribute
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// JVMSpec| MethodParameters_attribute {
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// JVMSpec| u2 attribute_name_index;
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// JVMSpec| u4 attribute_length;
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// JVMSpec| u1 parameters_count;
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// JVMSpec| { u2 name_index;
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// JVMSpec| u2 access_flags;
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// JVMSpec| } parameters[parameters_count];
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// JVMSpec| }
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void JvmtiClassFileReconstituter::write_method_parameter_attribute(const ConstMethod* const_method) {
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const MethodParametersElement *parameters = const_method->method_parameters_start();
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int length = const_method->method_parameters_length();
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assert(length <= max_jubyte, "must fit u1");
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int size = 1 // parameters_count
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+ (2 + 2) * length; // parameters
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write_attribute_name_index("MethodParameters");
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write_u4(size);
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write_u1(length);
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for (int index = 0; index < length; index++) {
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write_u2(parameters[index].name_cp_index);
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write_u2(parameters[index].flags);
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}
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}
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// Write SourceFile attribute
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// JVMSpec| SourceFile_attribute {
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// JVMSpec| u2 attribute_name_index;
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@ -689,6 +714,9 @@ void JvmtiClassFileReconstituter::write_method_info(const methodHandle& method)
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if (default_anno != NULL) {
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++attr_count; // has AnnotationDefault attribute
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}
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if (const_method->has_method_parameters()) {
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++attr_count; // has MethodParameters attribute
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}
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// Deprecated attribute would go here
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if (access_flags.is_synthetic()) { // FIXME
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// ++attr_count;
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@ -716,6 +744,9 @@ void JvmtiClassFileReconstituter::write_method_info(const methodHandle& method)
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if (default_anno != NULL) {
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write_annotations_attribute("AnnotationDefault", default_anno);
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}
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if (const_method->has_method_parameters()) {
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write_method_parameter_attribute(const_method);
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}
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// Deprecated attribute would go here
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if (access_flags.is_synthetic()) {
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// write_synthetic_attribute();
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@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2005, 2020, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2005, 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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@ -101,6 +101,7 @@ class JvmtiClassFileReconstituter : public JvmtiConstantPoolReconstituter {
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void write_method_info(const methodHandle& method);
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void write_code_attribute(const methodHandle& method);
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void write_exceptions_attribute(ConstMethod* const_method);
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void write_method_parameter_attribute(const ConstMethod* const_method);
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void write_synthetic_attribute();
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void write_class_attributes();
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void write_source_file_attribute();
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@ -1,5 +1,5 @@
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/*
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* Copyright (c) 2003, 2021, Oracle and/or its affiliates. All rights reserved.
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* Copyright (c) 2003, 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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@ -2266,21 +2266,6 @@ void VM_RedefineClasses::rewrite_cp_refs_in_method(methodHandle method,
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break;
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}
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} // end for each bytecode
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// We also need to rewrite the parameter name indexes, if there is
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// method parameter data present
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if(method->has_method_parameters()) {
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const int len = method->method_parameters_length();
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MethodParametersElement* elem = method->method_parameters_start();
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for (int i = 0; i < len; i++) {
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const u2 cp_index = elem[i].name_cp_index;
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const u2 new_cp_index = find_new_index(cp_index);
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if (new_cp_index != 0) {
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elem[i].name_cp_index = new_cp_index;
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}
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}
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}
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} // end rewrite_cp_refs_in_method()
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@ -3694,6 +3679,19 @@ void VM_RedefineClasses::set_new_constant_pool(
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} // end for each local variable table entry
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} // end if there are local variable table entries
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// Update constant pool indices in the method's method_parameters.
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int mp_length = method->method_parameters_length();
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if (mp_length > 0) {
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MethodParametersElement* elem = method->method_parameters_start();
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for (int j = 0; j < mp_length; j++) {
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const int cp_index = elem[j].name_cp_index;
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const int new_cp_index = find_new_index(cp_index);
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if (new_cp_index != 0) {
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elem[j].name_cp_index = (u2)new_cp_index;
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}
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}
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}
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rewrite_cp_refs_in_stack_map_table(method);
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} // end for each method
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} // end set_new_constant_pool()
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@ -0,0 +1,255 @@
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/*
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* Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 8240908
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*
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* @library /test/lib
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* @run compile -g -parameters RetransformWithMethodParametersTest.java
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* @run shell MakeJAR.sh retransformAgent
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*
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* @run main/othervm -javaagent:retransformAgent.jar RetransformWithMethodParametersTest
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*/
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import java.io.File;
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import java.io.FileOutputStream;
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import java.lang.instrument.ClassFileTransformer;
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import java.lang.reflect.Method;
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import java.lang.reflect.Parameter;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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import java.security.ProtectionDomain;
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import java.util.Arrays;
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import jdk.test.lib.JDKToolLauncher;
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import jdk.test.lib.process.ProcessTools;
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import jdk.test.lib.process.OutputAnalyzer;
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import jdk.test.lib.util.ClassTransformer;
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/*
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* The test verifies Instrumentation.retransformClasses() (and JVMTI function RetransformClasses)
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* correctly handles MethodParameter attribute:
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* 1) classfile bytes passed to transformers (and JVMTI ClassFileLoadHook event callback) contain the attribute;
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* 2) the attribute is updated if new version has the attribute with different values;
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* 3) the attribute is removed if new version doesn't contain the attribute.
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*/
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// See ClassTransformer.transform(int) comment for @1 tag explanations.
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class MethodParametersTarget {
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// The class contains the only method, so we don't have issue with method sorting
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// and ClassFileReconstituter should restore the same bytes as original classbytes.
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public void method1(
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int intParam1, String stringParam1 // @1 commentout
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// @1 uncomment int intParam2, String stringParam2
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)
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{
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// @1 uncomment System.out.println(stringParam2); // change CP
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}
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}
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public class RetransformWithMethodParametersTest extends ATransformerManagementTestCase {
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public static void main (String[] args) throws Throwable {
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ATestCaseScaffold test = new RetransformWithMethodParametersTest();
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test.runTest();
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}
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private String targetClassName = "MethodParametersTarget";
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private String classFileName = targetClassName + ".class";
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private String sourceFileName = "RetransformWithMethodParametersTest.java";
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private Class targetClass;
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private byte[] originalClassBytes;
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private byte[] seenClassBytes;
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private byte[] newClassBytes;
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public RetransformWithMethodParametersTest() throws Throwable {
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super("RetransformWithMethodParametersTest");
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File origClassFile = new File(System.getProperty("test.classes", "."), classFileName);
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log("Reading test class from " + origClassFile);
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originalClassBytes = Files.readAllBytes(origClassFile.toPath());
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log("Read " + originalClassBytes.length + " bytes.");
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}
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private void log(Object o) {
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System.out.println(String.valueOf(o));
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}
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private Parameter[] getTargetMethodParameters() throws ClassNotFoundException {
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Class cls = Class.forName(targetClassName);
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// the class contains 1 method (method1)
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Method method = cls.getDeclaredMethods()[0];
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Parameter[] params = method.getParameters();
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log("Params of " + method.getName() + " method (" + params.length + "):");
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for (int i = 0; i < params.length; i++) {
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log(" " + i + ": " + params[i].getName()
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+ " (" + (params[i].isNamePresent() ? "present" : "absent") + ")");
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}
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return params;
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}
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// Verifies MethodParameters attribute is present and contains the expected values.
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private void verifyPresentMethodParams(String... expectedNames) throws Throwable {
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Parameter[] params = getTargetMethodParameters();
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assertEquals(expectedNames.length, params.length);
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for (int i = 0; i < params.length; i++) {
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assertTrue(params[i].isNamePresent());
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assertEquals(expectedNames[i], params[i].getName());
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}
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}
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// Verifies MethodParameters attribute is absent.
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private void verifyAbsentMethodParams() throws Throwable {
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Parameter[] params = getTargetMethodParameters();
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for (int i = 0; i < params.length; i++) {
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assertTrue(!params[i].isNamePresent());
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}
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}
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// Retransforms target class using provided class bytes;
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// Returns class bytes passed to the transformer.
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private byte[] retransform(byte[] classBytes) throws Throwable {
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seenClassBytes = null;
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newClassBytes = classBytes;
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fInst.retransformClasses(targetClass);
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assertTrue(targetClassName + " was not seen by transform()", seenClassBytes != null);
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return seenClassBytes;
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}
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// Prints dissassembled class bytes.
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private void printDisassembled(String description, byte[] bytes) throws Exception {
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log(description + " -------------------");
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File f = new File(classFileName);
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try (FileOutputStream fos = new FileOutputStream(f)) {
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fos.write(bytes);
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}
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JDKToolLauncher javap = JDKToolLauncher.create("javap")
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.addToolArg("-verbose")
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.addToolArg("-p") // Shows all classes and members.
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//.addToolArg("-c") // Prints out disassembled code
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//.addToolArg("-s") // Prints internal type signatures.
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.addToolArg(f.toString());
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ProcessBuilder pb = new ProcessBuilder(javap.getCommand());
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OutputAnalyzer out = ProcessTools.executeProcess(pb);
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out.shouldHaveExitValue(0);
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try {
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Files.delete(f.toPath());
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} catch (Exception ex) {
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// ignore
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}
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out.asLines().forEach(s -> log(s));
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log("==========================================");
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}
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// Verifies class bytes are equal.
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private void compareClassBytes(byte[] expected, byte[] actual) throws Exception {
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int pos = Arrays.mismatch(expected, actual);
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if (pos < 0) {
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log("Class bytes are identical.");
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return;
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}
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log("Class bytes are different.");
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printDisassembled("expected", expected);
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printDisassembled("expected", actual);
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fail(targetClassName + " did not match .class file");
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}
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protected final void doRunTest() throws Throwable {
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beVerbose();
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ClassLoader loader = getClass().getClassLoader();
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targetClass = loader.loadClass(targetClassName);
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// sanity check
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assertEquals(targetClassName, targetClass.getName());
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// sanity check
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verifyPresentMethodParams("intParam1", "stringParam1");
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addTransformerToManager(fInst, new Transformer(), true);
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{
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log("Testcase 1: ensure ClassFileReconstituter restores MethodParameters attribute");
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byte[] classBytes = retransform(null);
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compareClassBytes(originalClassBytes, classBytes);
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log("");
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}
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{
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log("Testcase 2: redefine class with changed parameter names");
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byte[] classBytes = Files.readAllBytes(Paths.get(
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ClassTransformer.fromTestSource(sourceFileName)
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.transform(1, targetClassName, "-g", "-parameters")));
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retransform(classBytes);
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// MethodParameters attribute should be updated.
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verifyPresentMethodParams("intParam2", "stringParam2");
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log("");
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}
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{
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log("Testcase 3: redefine class with no parameter names");
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// compile without "-parameters"
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byte[] classBytes = Files.readAllBytes(Paths.get(
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ClassTransformer.fromTestSource(sourceFileName)
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.transform(1, targetClassName, "-g")));
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retransform(classBytes);
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// MethodParameters attribute should be dropped.
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verifyAbsentMethodParams();
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log("");
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}
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}
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public class Transformer implements ClassFileTransformer {
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public Transformer() {
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}
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public String toString() {
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return Transformer.this.getClass().getName();
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}
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public byte[] transform(ClassLoader loader, String className,
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Class<?> classBeingRedefined, ProtectionDomain protectionDomain, byte[] classfileBuffer) {
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if (className.equals(targetClassName)) {
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log(this + ".transform() sees '" + className
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+ "' of " + classfileBuffer.length + " bytes.");
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seenClassBytes = classfileBuffer;
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if (newClassBytes != null) {
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log(this + ".transform() sets new classbytes for '" + className
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+ "' of " + newClassBytes.length + " bytes.");
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}
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return newClassBytes;
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}
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return null;
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}
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}
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}
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163
test/lib/jdk/test/lib/util/ClassTransformer.java
Normal file
163
test/lib/jdk/test/lib/util/ClassTransformer.java
Normal file
@ -0,0 +1,163 @@
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/*
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* Copyright (c) 2018, 2022, Oracle and/or its affiliates. All rights reserved.
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* 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.
|
||||
*
|
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
||||
* or visit www.oracle.com if you need additional information or have any
|
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* questions.
|
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*/
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package jdk.test.lib.util;
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import jdk.test.lib.compiler.CompilerUtils;
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import java.io.IOException;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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import java.text.MessageFormat;
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import java.util.Arrays;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.regex.Matcher;
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import java.util.regex.Pattern;
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import java.util.stream.Collectors;
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// ClassTransformer provides functionality to transform java source and compile it.
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// We cannot use InMemoryJavaCompiler as test files usually contain 2 classes (the test itself and debuggee)
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// and InMemoryJavaCompiler cannot compile them.
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public class ClassTransformer {
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private final List<String> lines;
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private String fileName;
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private String workDir = "ver{0}";
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private static final String LINE_SEPARATOR = System.getProperty("line.separator");
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private ClassTransformer(List<String> lines) {
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this.lines = lines;
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}
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public ClassTransformer setFileName(String fileName) {
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this.fileName = fileName;
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return this;
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}
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// workDir is a MessageFormat pattern, id (int) is an {0} arg of the pattern.
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// can be relative (relatively "scratch" dir) or absolute.
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public ClassTransformer setWorkDir(String dir) {
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workDir = dir;
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return this;
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}
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public static ClassTransformer fromString(String content) {
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return new ClassTransformer(Arrays.asList(content.split("\\R")));
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}
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public static ClassTransformer fromFile(Path filePath) {
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try {
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return new ClassTransformer(Files.readAllLines(filePath))
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.setFileName(filePath.getFileName().toString());
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} catch (IOException e) {
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throw new RuntimeException("failed to read " + filePath, e);
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}
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}
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public static ClassTransformer fromFile(String filePath) {
|
||||
return fromFile(Paths.get(filePath));
|
||||
}
|
||||
|
||||
public static ClassTransformer fromTestSource(String fileName) {
|
||||
return fromFile(Paths.get(System.getProperty("test.src")).resolve(fileName));
|
||||
}
|
||||
|
||||
// returns path to the .class file of the transformed class
|
||||
public String transform(int id, String className, String... compilerOptions) {
|
||||
Path subdir = Paths.get(".").resolve(MessageFormat.format(workDir, id));
|
||||
Path transformedSrc = subdir.resolve(fileName);
|
||||
try {
|
||||
Files.createDirectories(subdir);
|
||||
Files.write(transformedSrc, transform(id).getBytes());
|
||||
} catch (IOException e) {
|
||||
throw new RuntimeException("failed to write transformed " + transformedSrc, e);
|
||||
}
|
||||
try {
|
||||
// need to add extra classpath args
|
||||
List<String> args = new LinkedList<>(Arrays.asList(compilerOptions));
|
||||
args.add("-cp");
|
||||
args.add(System.getProperty("java.class.path"));
|
||||
CompilerUtils.compile(subdir, subdir, false, args.toArray(new String[args.size()]));
|
||||
} catch (IOException e) {
|
||||
throw new RuntimeException("failed to compile " + transformedSrc, e);
|
||||
}
|
||||
return subdir.resolve(className + ".class").toString();
|
||||
}
|
||||
|
||||
/*
|
||||
* To do RedefineClasses operations, embed @1 tags in the .java
|
||||
* file to tell this script how to modify it to produce the 2nd
|
||||
* version of the .class file to be used in the redefine operation.
|
||||
* Here are examples of each editing tag and what change
|
||||
* it causes in the new file. Note that blanks are not preserved
|
||||
* in these editing operations.
|
||||
*
|
||||
* @1 uncomment
|
||||
* orig: // @1 uncomment gus = 89;
|
||||
* new: gus = 89;
|
||||
*
|
||||
* @1 commentout
|
||||
* orig: gus = 89 // @1 commentout
|
||||
* new: // gus = 89 // @1 commentout
|
||||
*
|
||||
* @1 delete
|
||||
* orig: gus = 89 // @1 delete
|
||||
* new: entire line deleted
|
||||
*
|
||||
* @1 newline
|
||||
* orig: gus = 89; // @1 newline gus++;
|
||||
* new: gus = 89; //
|
||||
* gus++;
|
||||
*
|
||||
* @1 replace
|
||||
* orig: gus = 89; // @1 replace gus = 90;
|
||||
* new: gus = 90;
|
||||
*/
|
||||
public String transform(int id) {
|
||||
Pattern delete = Pattern.compile("@" + id + " *delete");
|
||||
Pattern uncomment = Pattern.compile("// *@" + id + " *uncomment (.*)");
|
||||
Pattern commentout = Pattern.compile(".* @" + id + " *commentout");
|
||||
Pattern newline = Pattern.compile("(.*) @" + id + " *newline (.*)");
|
||||
Pattern replace = Pattern.compile("@" + id + " *replace (.*)");
|
||||
return lines.stream()
|
||||
.filter(s -> !delete.matcher(s).find()) // @1 delete
|
||||
.map(s -> {
|
||||
Matcher m = uncomment.matcher(s); // @1 uncomment
|
||||
return m.find() ? m.group(1) : s;
|
||||
})
|
||||
.map(s-> {
|
||||
Matcher m = commentout.matcher(s); // @1 commentout
|
||||
return m.find() ? "//" + s : s;
|
||||
})
|
||||
.map(s -> {
|
||||
Matcher m = newline.matcher(s); // @1 newline
|
||||
return m.find() ? m.group(1) + LINE_SEPARATOR + m.group(2) : s;
|
||||
})
|
||||
.map(s -> {
|
||||
Matcher m = replace.matcher(s); // @1 replace
|
||||
return m.find() ? m.group(1) : s;
|
||||
})
|
||||
.collect(Collectors.joining(LINE_SEPARATOR));
|
||||
}
|
||||
|
||||
}
|
Loading…
x
Reference in New Issue
Block a user