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Java Bytecode: Passing Parameters

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Anton Arhipov
Anton Arhipov
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Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; 10: areturn Stack var value 1 value depth 2 1 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 1 6 2 3
Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; 10: areturn Stack var value 1 value depth 2 1 this 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 1 6 2 3
Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; 10: areturn Stack var value 1 value depth 2 1 objectref 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 1 6 2 3
Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; 10: areturn Stack var value objectref 1 value depth 2 1 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 1 6 2 3
Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; 10: areturn Stack var value objectref 1 value depth 2 1 this 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 1 6 2 3
Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; 10: areturn Stack var value objectref 1 value depth 2 1 objectref 3 2 this 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 1 6 2 3
Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3;//incValue 10: areturn Stack var value objectref 1 value depth 2 1 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 objectref 1 6 2 3
Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; //incValue 10: areturn Stack var value objectref 1 value depth 2 1 objectref 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 objectref 1 6 2 3
Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; //incValue 10: areturn Stack var value objectref 1 value depth 2 1 X 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8;// Integer.intValue:() 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 objectref 1 6 2 3
Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; //incValue 10: areturn Stack var value objectref 1 value depth 2 1 1 3 2 X 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 objectref 1 6 2 3
Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; //incValue 10: areturn Stack var value objectref 1 value depth 2 1 X + 1 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 objectref 1 6 2 3
Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; //incValue 10: areturn Stack var value objectref 1 value depth 2 1 objectref 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7;//Integer.valueOf 9: areturn 5 objectref 1 6 2 3
Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; //incValue 10: areturn Stack var value objectref 1 value depth 2 1 objectref 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 objectref 1 6 2 3
Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; 10: areturn Stack var value objectref 1 value depth 2 1 objectref 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 1 6 2 3
Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; 10: areturn Stack var value 1 value depth 2 1 objectref 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 1 6 2 3

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Java Bytecode: Passing Parameters

  • 1. Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; 10: areturn Stack var value 1 value depth 2 1 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 1 6 2 3
  • 2. Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; 10: areturn Stack var value 1 value depth 2 1 this 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 1 6 2 3
  • 3. Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; 10: areturn Stack var value 1 value depth 2 1 objectref 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 1 6 2 3
  • 4. Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; 10: areturn Stack var value objectref 1 value depth 2 1 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 1 6 2 3
  • 5. Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; 10: areturn Stack var value objectref 1 value depth 2 1 this 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 1 6 2 3
  • 6. Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; 10: areturn Stack var value objectref 1 value depth 2 1 objectref 3 2 this 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 1 6 2 3
  • 7. Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3;//incValue 10: areturn Stack var value objectref 1 value depth 2 1 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 objectref 1 6 2 3
  • 8. Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; //incValue 10: areturn Stack var value objectref 1 value depth 2 1 objectref 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 objectref 1 6 2 3
  • 9. Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; //incValue 10: areturn Stack var value objectref 1 value depth 2 1 X 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8;// Integer.intValue:() 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 objectref 1 6 2 3
  • 10. Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; //incValue 10: areturn Stack var value objectref 1 value depth 2 1 1 3 2 X 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 objectref 1 6 2 3
  • 11. Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; //incValue 10: areturn Stack var value objectref 1 value depth 2 1 X + 1 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 objectref 1 6 2 3
  • 12. Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; //incValue 10: areturn Stack var value objectref 1 value depth 2 1 objectref 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7;//Integer.valueOf 9: areturn 5 objectref 1 6 2 3
  • 13. Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; //incValue 10: areturn Stack var value objectref 1 value depth 2 1 objectref 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 objectref 1 6 2 3
  • 14. Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; 10: areturn Stack var value objectref 1 value depth 2 1 objectref 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 1 6 2 3
  • 15. Local Variables public java.lang.Object execute(); 0: aload_0 1: invokespecial #2; 4: astore_1 5: aload_0 6: aload_1 7: invokespecial #3; 10: areturn Stack var value 1 value depth 2 1 objectref 3 2 3 private java.lang.Integer incValue(java.lang.Integer); 4 var value 0: aload_1 1: invokevirtual #8; 4: iconst_1 5: iadd 6: invokestatic #7; 9: areturn 5 1 6 2 3