| /* |
| * Copyright (c) 2018, 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. |
| */ |
| |
| /* |
| Pseudo Java code: |
| |
| class CondyNestedResolution { |
| public static Object bsm1arg(MethodHandles$Lookup p1, String p2, Object p3, Object p4) { |
| System.out.println("In bsm1arg"); |
| System.out.println(p4); |
| return p4; |
| } |
| public static Object bsm2arg(MethodHandles$Lookup p1, String p2, Object p3, Object p4, Object p5) { |
| System.out.println("In bsm2arg"); |
| System.out.println(p4); |
| System.out.println(p5); |
| return p4; |
| } |
| public static Object bsm3arg(MethodHandles$Lookup p1, String p2, Object p3, Object p4, Object p5, Object p6) { |
| System.out.println("In bsm3arg"); |
| System.out.println(p4); |
| System.out.println(p5); |
| System.out.println(p6); |
| return p4; |
| } |
| public static Object bsm4arg(MethodHandles$Lookup p1, String p2, Object p3, Object p4, Object p5, Object p6, Object p7) { |
| System.out.println("In bsm4arg"); |
| System.out.println(p4); |
| System.out.println(p5); |
| System.out.println(p6); |
| System.out.println(p7); |
| return p4; |
| } |
| |
| public static void test_condy() { |
| // The following condy of BSM#8 results in the invocation of bootstrap method bsm4arg with the following |
| // parameters: |
| // bsm4arg(bsm1arg("hello1"), |
| // bsm1arg("hello2"), |
| // bsm3arg(bsm1arg("hello4"), bsm2arg(bsm1arg("hello6"), (circular reference to BSM#8)), bsm1arg("hello5")), |
| // bsm1arg("hello3")); |
| // JVMS 5.4.3.6 Dynamically-Computed Constant and Call Site Resolution |
| // Ensure that calls to bsm1arg("hello5") and bsm1arg("hello3") are never resolved due to the nested condy circularity |
| // which results in a StackOverflowError. |
| // |
| ldc Dynamic BSM#8; |
| } |
| public static void main(String args[]) { |
| CondyNestedResolution.test_condy(); |
| } |
| } |
| |
| BootstrapMethods: |
| BSM0=invokestatic CondyNestedResolution.bsm1arg("hello1"); |
| BSM1=invokestatic CondyNestedResolution.bsm1arg("hello2"); |
| BSM2=invokestatic CondyNestedResolution.bsm1arg("hello4"); |
| BSM3=invokestatic CondyNestedResolution.bsm1arg("hello6"); |
| BSM4=invokestatic CondyNestedResolution.bsm2arg(BSM#3, BSM#8); |
| BSM5=invokestatic CondyNestedResolution.bsm1arg("hello5"); |
| BSM6=invokestatic CondyNestedResolution.bsm3arg(BSM#2, BSM#4, BSM#5); |
| BSM7=invokestatic CondyNestedResolution.bsm1arg("hello3"); |
| BSM8=invokestatic CondyNestedResolution.bsm4arg(BSM#0, BSM#1, BSM#6, BSM#7); |
| |
| Expected output: |
| In bsm1arg |
| hello1 |
| In bsm1arg |
| hello2 |
| In bsm1arg |
| hello4 |
| In bsm1arg |
| hello6 |
| Exception in thread "main" java.lang.StackOverflowError |
| at java.base/java.lang.invoke.MethodHandleNatives.copyOutBootstrapArguments(Native Method) |
| */ |
| |
| |
| class CondyNestedResolution { |
| 0xCAFEBABE; |
| 0; // minor version |
| 55; // version |
| [85] { // Constant Pool |
| ; // first element is empty |
| String #22; // #1 at 0x0A |
| String #61; // #2 at 0x0D |
| String #11; // #3 at 0x10 |
| Dynamic 8s #12; // #4 at 0x13 |
| Method #51 #10; // #5 at 0x18 |
| Method #13 #39; // #6 at 0x1D |
| Field #50 #81; // #7 at 0x22 |
| Method #84 #45; // #8 at 0x27 |
| Utf8 "java/io/PrintStream"; // #9 at 0x2C |
| NameAndType #71 #47; // #10 at 0x42 |
| Utf8 "In bsm1arg"; // #11 at 0x47 |
| NameAndType #18 #17; // #12 at 0x54 |
| class #9; // #13 at 0x59 |
| Utf8 "SourceFile"; // #14 at 0x5C |
| Utf8 "bsm3arg"; // #15 at 0x69 |
| Utf8 "CondyNestedResolution.jasm"; // #16 at 0x73 |
| Utf8 "Ljava/lang/String;"; // #17 at 0x90 |
| Utf8 "name"; // #18 at 0xA5 |
| Utf8 "(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;"; // #19 at 0xAC |
| Utf8 "test_condy"; // #20 at 0x0144 |
| NameAndType #15 #19; // #21 at 0x0151 |
| Utf8 "In bsm2arg"; // #22 at 0x0156 |
| Utf8 "Code"; // #23 at 0x0163 |
| Utf8 "([Ljava/lang/String;)V"; // #24 at 0x016A |
| Utf8 "bsm4arg"; // #25 at 0x0183 |
| Utf8 "out"; // #26 at 0x018D |
| NameAndType #69 #55; // #27 at 0x0193 |
| Utf8 "BootstrapMethods"; // #28 at 0x0198 |
| MethodHandle 6b #44; // #29 at 0x01AB |
| Method #84 #63; // #30 at 0x01AF |
| Utf8 "(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;"; // #31 at 0x01B4 |
| Method #84 #27; // #32 at 0x0228 |
| MethodHandle 6b #30; // #33 at 0x022D |
| MethodHandle 6b #30; // #34 at 0x0231 |
| MethodHandle 6b #30; // #35 at 0x0235 |
| MethodHandle 6b #30; // #36 at 0x0239 |
| MethodHandle 6b #30; // #37 at 0x023D |
| MethodHandle 6b #30; // #38 at 0x0241 |
| NameAndType #40 #41; // #39 at 0x0245 |
| Utf8 "println"; // #40 at 0x024A |
| Utf8 "(Ljava/lang/Object;)V"; // #41 at 0x0254 |
| Utf8 "java/lang/Object"; // #42 at 0x026C |
| Utf8 "java/lang/System"; // #43 at 0x027F |
| Method #84 #21; // #44 at 0x0292 |
| NameAndType #20 #47; // #45 at 0x0297 |
| MethodHandle 6b #82; // #46 at 0x029C |
| Utf8 "()V"; // #47 at 0x02A0 |
| String #62; // #48 at 0x02A6 |
| String #64; // #49 at 0x02A9 |
| class #43; // #50 at 0x02AC |
| class #42; // #51 at 0x02AF |
| String #65; // #52 at 0x02B2 |
| String #66; // #53 at 0x02B5 |
| String #67; // #54 at 0x02B8 |
| Utf8 "(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;"; // #55 at 0x02BB |
| Utf8 "main"; // #56 at 0x0341 |
| String #68; // #57 at 0x0348 |
| MethodHandle 6b #32; // #58 at 0x034B |
| Utf8 "bsm1arg"; // #59 at 0x034F |
| NameAndType #25 #83; // #60 at 0x0359 |
| Utf8 "In bsm4arg"; // #61 at 0x035E |
| Utf8 "hello6"; // #62 at 0x036B |
| NameAndType #59 #31; // #63 at 0x0374 |
| Utf8 "hello5"; // #64 at 0x0379 |
| Utf8 "hello4"; // #65 at 0x0382 |
| Utf8 "hello3"; // #66 at 0x038B |
| Utf8 "hello2"; // #67 at 0x0394 |
| Utf8 "hello1"; // #68 at 0x039D |
| Utf8 "bsm2arg"; // #69 at 0x03A6 |
| Utf8 "Ljava/io/PrintStream;"; // #70 at 0x03B0 |
| Utf8 "<init>"; // #71 at 0x03C8 |
| Utf8 "CondyNestedResolution"; // #72 at 0x03D1 |
| Dynamic 7s #12; // #73 at 0x03E9 |
| Dynamic 6s #12; // #74 at 0x03EE |
| Dynamic 5s #12; // #75 at 0x03F3 |
| Dynamic 4s #12; // #76 at 0x03F8 |
| Dynamic 3s #12; // #77 at 0x03FD |
| Dynamic 0s #12; // #78 at 0x0402 |
| Dynamic 1s #12; // #79 at 0x0407 |
| Dynamic 2s #12; // #80 at 0x040C |
| NameAndType #26 #70; // #81 at 0x0411 |
| Method #84 #60; // #82 at 0x0416 |
| Utf8 "(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;"; // #83 at 0x041B |
| class #72; // #84 at 0x04C5 |
| } // Constant Pool |
| |
| 0x0000; // access [ ] |
| #84;// this_cpx |
| #51;// super_cpx |
| |
| [0] { // Interfaces |
| } // Interfaces |
| |
| [0] { // fields |
| } // fields |
| |
| [7] { // methods |
| { // Member at 0x04D4 |
| 0x0001; // access |
| #71; // name_cpx |
| #47; // sig_cpx |
| [1] { // Attributes |
| Attr(#23, 17) { // Code at 0x04DC |
| 1; // max_stack |
| 1; // max_locals |
| Bytes[5]{ |
| 0x2AB70005B1; |
| } |
| [0] { // Traps |
| } // end Traps |
| [0] { // Attributes |
| } // Attributes |
| } // end Code |
| } // Attributes |
| } // Member |
| ; |
| { // Member at 0x04F3 |
| 0x0009; // access |
| #59; // name_cpx |
| #31; // sig_cpx |
| [1] { // Attributes |
| Attr(#23, 29) { // Code at 0x04FB |
| 4; // max_stack |
| 4; // max_locals |
| Bytes[17]{ |
| 0xB200071203B60006; |
| 0xB200072DB600062D; |
| 0xB0; |
| } |
| [0] { // Traps |
| } // end Traps |
| [0] { // Attributes |
| } // Attributes |
| } // end Code |
| } // Attributes |
| } // Member |
| ; |
| { // Member at 0x051E |
| 0x0009; // access |
| #69; // name_cpx |
| #55; // sig_cpx |
| [1] { // Attributes |
| Attr(#23, 37) { // Code at 0x0526 |
| 8; // max_stack |
| 8; // max_locals |
| Bytes[25]{ |
| 0xB200071201B60006; |
| 0xB200072DB60006B2; |
| 0x00071904B600062D; |
| 0xB0; |
| } |
| [0] { // Traps |
| } // end Traps |
| [0] { // Attributes |
| } // Attributes |
| } // end Code |
| } // Attributes |
| } // Member |
| ; |
| { // Member at 0x0551 |
| 0x0009; // access |
| #15; // name_cpx |
| #19; // sig_cpx |
| [1] { // Attributes |
| Attr(#23, 45) { // Code at 0x0559 |
| 19; // max_stack |
| 19; // max_locals |
| Bytes[33]{ |
| 0xB200071202B60006; |
| 0xB200072DB60006B2; |
| 0x00071904B60006B2; |
| 0x00071905B600062D; |
| 0xB0; |
| } |
| [0] { // Traps |
| } // end Traps |
| [0] { // Attributes |
| } // Attributes |
| } // end Code |
| } // Attributes |
| } // Member |
| ; |
| { // Member at 0x058C |
| 0x0009; // access |
| #25; // name_cpx |
| #83; // sig_cpx |
| [1] { // Attributes |
| Attr(#23, 53) { // Code at 0x0594 |
| 19; // max_stack |
| 19; // max_locals |
| Bytes[41]{ |
| 0xB200071202B60006; |
| 0xB200072DB60006B2; |
| 0x00071904B60006B2; |
| 0x00071905B60006B2; |
| 0x00071906B600062D; |
| 0xB0; |
| } |
| [0] { // Traps |
| } // end Traps |
| [0] { // Attributes |
| } // Attributes |
| } // end Code |
| } // Attributes |
| } // Member |
| ; |
| { // Member at 0x05CF |
| 0x0009; // access |
| #20; // name_cpx |
| #47; // sig_cpx |
| [1] { // Attributes |
| Attr(#23, 15) { // Code at 0x05D7 |
| 12; // max_stack |
| 12; // max_locals |
| Bytes[3]{ |
| 0x1204B1; |
| } |
| [0] { // Traps |
| } // end Traps |
| [0] { // Attributes |
| } // Attributes |
| } // end Code |
| } // Attributes |
| } // Member |
| ; |
| { // Member at 0x05EC |
| 0x0009; // access |
| #56; // name_cpx |
| #24; // sig_cpx |
| [1] { // Attributes |
| Attr(#23, 16) { // Code at 0x05F4 |
| 2; // max_stack |
| 2; // max_locals |
| Bytes[4]{ |
| 0xB80008B1; |
| } |
| [0] { // Traps |
| } // end Traps |
| [0] { // Attributes |
| } // Attributes |
| } // end Code |
| } // Attributes |
| } // Member |
| } // methods |
| |
| [2] { // Attributes |
| Attr(#14, 2) { // SourceFile at 0x060C |
| #16; |
| } // end SourceFile |
| ; |
| Attr(#28, 68) { // BootstrapMethods at 0x0614 |
| [9] { // bootstrap_methods |
| { // bootstrap_method |
| #36; // bootstrap_method_ref |
| [1] { // bootstrap_arguments |
| #57; // at 0x0622 |
| } // bootstrap_arguments |
| } // bootstrap_method |
| ; |
| { // bootstrap_method |
| #37; // bootstrap_method_ref |
| [1] { // bootstrap_arguments |
| #54; // at 0x0628 |
| } // bootstrap_arguments |
| } // bootstrap_method |
| ; |
| { // bootstrap_method |
| #38; // bootstrap_method_ref |
| [1] { // bootstrap_arguments |
| #52; // at 0x062E |
| } // bootstrap_arguments |
| } // bootstrap_method |
| ; |
| { // bootstrap_method |
| #35; // bootstrap_method_ref |
| [1] { // bootstrap_arguments |
| #48; // at 0x0634 |
| } // bootstrap_arguments |
| } // bootstrap_method |
| ; |
| { // bootstrap_method |
| #58; // bootstrap_method_ref |
| [2] { // bootstrap_arguments |
| #77; // at 0x063A |
| #4; // at 0x063C |
| } // bootstrap_arguments |
| } // bootstrap_method |
| ; |
| { // bootstrap_method |
| #34; // bootstrap_method_ref |
| [1] { // bootstrap_arguments |
| #49; // at 0x0642 |
| } // bootstrap_arguments |
| } // bootstrap_method |
| ; |
| { // bootstrap_method |
| #29; // bootstrap_method_ref |
| [3] { // bootstrap_arguments |
| #80; // at 0x0648 |
| #76; // at 0x064A |
| #75; // at 0x064C |
| } // bootstrap_arguments |
| } // bootstrap_method |
| ; |
| { // bootstrap_method |
| #33; // bootstrap_method_ref |
| [1] { // bootstrap_arguments |
| #53; // at 0x0652 |
| } // bootstrap_arguments |
| } // bootstrap_method |
| ; |
| { // bootstrap_method |
| #46; // bootstrap_method_ref |
| [4] { // bootstrap_arguments |
| #78; // at 0x0658 |
| #79; // at 0x065A |
| #74; // at 0x065C |
| #73; // at 0x065E |
| } // bootstrap_arguments |
| } // bootstrap_method |
| } |
| } // end BootstrapMethods |
| } // Attributes |
| } // end class CondyNestedResolution |
