/* * Copyright (c) 2021, 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. */ // The constant pool in this class contains an unused NameAndType entry (#20) // that points to method and signature ()D. This is a valid NameAndType // because is a valid method name and ()D is a valid method signature. class nonVoidInitSig { 0xCAFEBABE; 0; // minor version 62; // version [21] { // Constant Pool ; // first element is empty Method #2 #3; // #1 at 0x0A class #4; // #2 at 0x0F NameAndType #5 #6; // #3 at 0x12 Utf8 "java/lang/Object"; // #4 at 0x17 Utf8 ""; // #5 at 0x2A Utf8 "()V"; // #6 at 0x33 class #8; // #7 at 0x39 Utf8 "nonVoidInitSig"; // #8 at 0x3C Method #7 #3; // #9 at 0x47 Utf8 "Code"; // #10 at 0x4C Utf8 "LineNumberTable"; // #11 at 0x53 Utf8 "func"; // #12 at 0x65 Utf8 "([Ljava/lang/String;)V"; // #13 at 0x6C Utf8 "Exceptions"; // #14 at 0x85 class #16; // #15 at 0x92 Utf8 "java/lang/Throwable"; // #16 at 0x95 Utf8 "SourceFile"; // #17 at 0xAB Utf8 "nonVoidInitSig.java"; // #18 at 0xB8 Utf8 "()D"; // #19 NameAndType #5 #19; // #20 // Unused, points to ()D. } // Constant Pool 0x0021; // access [ ACC_PUBLIC ACC_SUPER ] #7;// this_cpx #2;// super_cpx [0] { // Interfaces } // Interfaces [0] { // Fields } // Fields [2] { // Methods { // method at 0xD4 0x0001; // access #5; // name_index : #6; // descriptor_index : ()V [1] { // Attributes Attr(#10, 29) { // Code at 0xDC 1; // max_stack 1; // max_locals Bytes[5]{ 0x2AB70001B1; } [0] { // Traps } // end Traps [1] { // Attributes Attr(#11, 6) { // LineNumberTable at 0xF3 [1] { // line_number_table 0 1; // at 0xFF } } // end LineNumberTable } // Attributes } // end Code } // Attributes } ; { // method at 0xFF 0x0009; // access #12; // name_index : func #13; // descriptor_index : ([Ljava/lang/String;)V [2] { // Attributes Attr(#10, 37) { // Code at 0x0107 2; // max_stack 2; // max_locals Bytes[9]{ 0xBB000759B700094C; 0xB1; } [0] { // Traps } // end Traps [1] { // Attributes Attr(#11, 10) { // LineNumberTable at 0x0122 [2] { // line_number_table 0 4; // at 0x012E 8 5; // at 0x0132 } } // end LineNumberTable } // Attributes } // end Code ; Attr(#14, 4) { // Exceptions at 0x0132 [1] { // Exceptions #15; // at 0x013C } } // end Exceptions } // Attributes } } // Methods [1] { // Attributes Attr(#17, 2) { // SourceFile at 0x013E #18; } // end SourceFile } // Attributes } // end class nonVoidInitSig // The constant pool in this class contains a cp NameAndType entry (#3) that // points to method and signature ()D. This is a valid NameAndType // because is a valid method name and ()D is a valid method signature. // But, a cp Methodref (#1) that points to NameAndType with a method named // and a non-void return type, is invalid. class nonVoidInitSigCFE { 0xCAFEBABE; 0; // minor version 62; // version [20] { // Constant Pool ; // first element is empty Method #2 #3; // #1 at 0x0A class #4; // #2 at 0x0F NameAndType #5 #19; // #3 at 0x12 Utf8 "java/lang/Object"; // #4 at 0x17 Utf8 ""; // #5 at 0x2A Utf8 "()V"; // #6 at 0x33 class #8; // #7 at 0x39 Utf8 "nonVoidInitSigCFE"; // #8 at 0x3C Method #7 #3; // #9 at 0x47 Utf8 "Code"; // #10 at 0x4C Utf8 "LineNumberTable"; // #11 at 0x53 Utf8 "func"; // #12 at 0x65 Utf8 "([Ljava/lang/String;)V"; // #13 at 0x6C Utf8 "Exceptions"; // #14 at 0x85 class #16; // #15 at 0x92 Utf8 "java/lang/Throwable"; // #16 at 0x95 Utf8 "SourceFile"; // #17 at 0xAB Utf8 "nonVoidInitSigCFE.java"; // #18 at 0xB8 Utf8 "()D"; // #19 } // Constant Pool 0x0021; // access [ ACC_PUBLIC ACC_SUPER ] #7;// this_cpx #2;// super_cpx [0] { // Interfaces } // Interfaces [0] { // Fields } // Fields [2] { // Methods { // method at 0xD4 0x0001; // access #5; // name_index : #6; // descriptor_index : ()V [1] { // Attributes Attr(#10, 29) { // Code at 0xDC 1; // max_stack 1; // max_locals Bytes[5]{ 0x2AB70001B1; } [0] { // Traps } // end Traps [1] { // Attributes Attr(#11, 6) { // LineNumberTable at 0xF3 [1] { // line_number_table 0 1; // at 0xFF } } // end LineNumberTable } // Attributes } // end Code } // Attributes } ; { // method at 0xFF 0x0009; // access #12; // name_index : func #13; // descriptor_index : ([Ljava/lang/String;)V [2] { // Attributes Attr(#10, 37) { // Code at 0x0107 2; // max_stack 2; // max_locals Bytes[9]{ 0xBB000759B700094C; 0xB1; } [0] { // Traps } // end Traps [1] { // Attributes Attr(#11, 10) { // LineNumberTable at 0x0122 [2] { // line_number_table 0 4; // at 0x012E 8 5; // at 0x0132 } } // end LineNumberTable } // Attributes } // end Code ; Attr(#14, 4) { // Exceptions at 0x0132 [1] { // Exceptions #15; // at 0x013C } } // end Exceptions } // Attributes } } // Methods [1] { // Attributes Attr(#17, 2) { // SourceFile at 0x013E #18; } // end SourceFile } // Attributes } // end class nonVoidInitSigCFE // The constant pool in this class contains a cp NameAndType entry (#20) that // points to method and signature ()))V. This is an invalid NameAndType // entry and should throw a ClassFormatError exception, with a message containing // the name and the bad signature, even thought the NameAndType is not // referenced by a cp Methodref. class voidInitBadSig { 0xCAFEBABE; 0; // minor version 62; // version [21] { // Constant Pool ; // first element is empty Method #2 #3; // #1 at 0x0A class #4; // #2 at 0x0F NameAndType #5 #6; // #3 at 0x12 Utf8 "java/lang/Object"; // #4 at 0x17 Utf8 ""; // #5 at 0x2A Utf8 "()V"; // #6 at 0x33 class #8; // #7 at 0x39 Utf8 "voidInitBadSig"; // #8 at 0x3C Method #7 #3; // #9 at 0x47 Utf8 "Code"; // #10 at 0x4C Utf8 "LineNumberTable"; // #11 at 0x53 Utf8 "func"; // #12 at 0x65 Utf8 "([Ljava/lang/String;)V"; // #13 at 0x6C Utf8 "Exceptions"; // #14 at 0x85 class #16; // #15 at 0x92 Utf8 "java/lang/Throwable"; // #16 at 0x95 Utf8 "SourceFile"; // #17 at 0xAB Utf8 "voidInitBadSig.java"; // #18 at 0xB8 Utf8 "()))V"; // #19 NameAndType #5 #19; // #20 // Unused, points to ()))V. } // Constant Pool 0x0021; // access [ ACC_PUBLIC ACC_SUPER ] #7;// this_cpx #2;// super_cpx [0] { // Interfaces } // Interfaces [0] { // Fields } // Fields [2] { // Methods { // method at 0xD4 0x0001; // access #5; // name_index : #6; // descriptor_index : ()V [1] { // Attributes Attr(#10, 29) { // Code at 0xDC 1; // max_stack 1; // max_locals Bytes[5]{ 0x2AB70001B1; } [0] { // Traps } // end Traps [1] { // Attributes Attr(#11, 6) { // LineNumberTable at 0xF3 [1] { // line_number_table 0 1; // at 0xFF } } // end LineNumberTable } // Attributes } // end Code } // Attributes } ; { // method at 0xFF 0x0009; // access #12; // name_index : func #13; // descriptor_index : ([Ljava/lang/String;)V [2] { // Attributes Attr(#10, 37) { // Code at 0x0107 2; // max_stack 2; // max_locals Bytes[9]{ 0xBB000759B700094C; 0xB1; } [0] { // Traps } // end Traps [1] { // Attributes Attr(#11, 10) { // LineNumberTable at 0x0122 [2] { // line_number_table 0 4; // at 0x012E 8 5; // at 0x0132 } } // end LineNumberTable } // Attributes } // end Code ; Attr(#14, 4) { // Exceptions at 0x0132 [1] { // Exceptions #15; // at 0x013C } } // end Exceptions } // Attributes } } // Methods [1] { // Attributes Attr(#17, 2) { // SourceFile at 0x013E #18; } // end SourceFile } // Attributes } // end class voidInitBadSig