/* * 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. */ /* * @test * @bug 8174954 * @library /test/lib * @modules java.base/jdk.internal.org.objectweb.asm * @compile -XDignore.symbol.file BSMCalledTwice.java * @run main BSMCalledTwice */ import java.io.File; import java.io.FileOutputStream; import java.util.*; import static jdk.internal.org.objectweb.asm.Opcodes.*; import jdk.internal.org.objectweb.asm.*; import jdk.test.lib.process.ProcessTools; import jdk.test.lib.process.OutputAnalyzer; // BSMCalledTwice generates a class file named "TestC.class" that contains // bytecodes that represent the following program // // public class TestC { // public static void main(java.lang.String[] arg) { // for (int i=0; i < 2; i++) { // try { // String f = "friend"; // // // The "hello " + f in the following statement produces an // // invokedynamic with a BSM of // // StringConcatFactory.java/makeConcatWithConstants. // // The ASM below erroneously puts 2 static arguments, "hello " // // and "goodbye" on the stack for the BSM. Causing a exception to // // be thrown when creatingthe CallSite object. // System.out.println("hello " + f); <--------------- invokedynamic // // } catch (Error e) { // System.out.println("Caught Error:"); // System.out.println(e.getMessage()); // e.printStackTrace(); // } // } // } // } // public class BSMCalledTwice implements Opcodes { static final String classTestCName = "TestC"; public static int count_makeSite(String text) { int count = 0; String text_ptr = text; while (text_ptr.indexOf("makeSite") != -1) { text_ptr = text_ptr.substring(text_ptr.indexOf("makeSite") + 1); count++; } return count; } public static void main(String[] args) throws Exception { ClassLoader cl = new ClassLoader() { public Class loadClass(String name) throws ClassNotFoundException { if (findLoadedClass(name) != null) { return findLoadedClass(name); } if (classTestCName.equals(name)) { byte[] classFile = null; try { classFile = dumpTestC(); } catch (Exception e) { } return defineClass(classTestCName, classFile, 0, classFile.length); } return super.loadClass(name); } }; cl.loadClass(classTestCName); ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(true, "-cp", ".", classTestCName); OutputAnalyzer output = new OutputAnalyzer(pb.start()); String test_output = output.getOutput(); if (test_output == null) { throw new RuntimeException("Test failed, null test output"); } // "makeSite" is currently listed twice in the exception stacks for each // failing call to the BootstrapMethod. So more that two calls means // that the BootstrapMethod was called more than once. int count = count_makeSite(test_output); if (count < 1 || count > 2) { throw new RuntimeException("Test failed, bad number of calls to BootstrapMethod"); } output.shouldHaveExitValue(0); } public static byte[] dumpTestC () throws Exception { ClassWriter cw = new ClassWriter(0); FieldVisitor fv; MethodVisitor mv; AnnotationVisitor av0; cw.visit(53, ACC_PUBLIC + ACC_SUPER, classTestCName, null, "java/lang/Object", null); cw.visitInnerClass("java/lang/invoke/MethodHandles$Lookup", "java/lang/invoke/MethodHandles", "Lookup", ACC_PUBLIC + ACC_FINAL + ACC_STATIC); { mv = cw.visitMethod(ACC_PUBLIC, "", "()V", null, null); mv.visitCode(); mv.visitVarInsn(ALOAD, 0); mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "", "()V", false); mv.visitInsn(RETURN); mv.visitMaxs(1, 1); mv.visitEnd(); } { mv = cw.visitMethod(ACC_PUBLIC + ACC_STATIC, "main", "([Ljava/lang/String;)V", null, null); mv.visitCode(); Label l0 = new Label(); Label l1 = new Label(); Label l2 = new Label(); mv.visitTryCatchBlock(l0, l1, l2, "java/lang/Error"); mv.visitInsn(ICONST_0); mv.visitVarInsn(ISTORE, 1); Label l3 = new Label(); mv.visitLabel(l3); mv.visitFrame(Opcodes.F_APPEND,1, new Object[] {Opcodes.INTEGER}, 0, null); mv.visitVarInsn(ILOAD, 1); mv.visitInsn(ICONST_2); Label l4 = new Label(); mv.visitJumpInsn(IF_ICMPGE, l4); mv.visitLabel(l0); mv.visitLdcInsn("friend"); mv.visitVarInsn(ASTORE, 2); mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); mv.visitVarInsn(ALOAD, 2); mv.visitInvokeDynamicInsn("makeConcatWithConstants", "(Ljava/lang/String;)Ljava/lang/String;", new Handle(Opcodes.H_INVOKESTATIC, "java/lang/invoke/StringConcatFactory", "makeConcatWithConstants", "(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/invoke/MethodType;Ljava/lang/String;[Ljava/lang/Object;)Ljava/lang/invoke/CallSite;"), new Object[]{"hello \u0001", "goodbye"}); mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false); mv.visitLabel(l1); Label l5 = new Label(); mv.visitJumpInsn(GOTO, l5); mv.visitLabel(l2); mv.visitFrame(Opcodes.F_SAME1, 0, null, 1, new Object[] {"java/lang/Error"}); mv.visitVarInsn(ASTORE, 2); mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); mv.visitLdcInsn("Caught Error:"); mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false); mv.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); mv.visitVarInsn(ALOAD, 2); mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Error", "getMessage", "()Ljava/lang/String;", false); mv.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/String;)V", false); mv.visitVarInsn(ALOAD, 2); mv.visitMethodInsn(INVOKEVIRTUAL, "java/lang/Error", "printStackTrace", "()V", false); mv.visitLabel(l5); mv.visitFrame(Opcodes.F_SAME, 0, null, 0, null); mv.visitIincInsn(1, 1); mv.visitJumpInsn(GOTO, l3); mv.visitLabel(l4); mv.visitFrame(Opcodes.F_CHOP,1, null, 0, null); mv.visitInsn(RETURN); mv.visitMaxs(2, 3); mv.visitEnd(); } cw.visitEnd(); try(FileOutputStream fos = new FileOutputStream(new File("TestC.class"))) { fos.write(cw.toByteArray()); } return cw.toByteArray(); } }