[jboss-jira] [JBoss JIRA] Closed: (JASSIST-71) Array access replacement generates invalid bytecode when padding is required

[Shigeru Chiba (JIRA)]

     [ https://jira.jboss.org/jira/browse/JASSIST-71?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shigeru Chiba closed JASSIST-71.
--------------------------------



> Array access replacement generates invalid bytecode when padding is required
> ----------------------------------------------------------------------------
>
>                 Key: JASSIST-71
>                 URL: https://jira.jboss.org/jira/browse/JASSIST-71
>             Project: Javassist
>          Issue Type: Bug
>            Reporter: Jason T. Greene
>            Assignee: Shigeru Chiba
>
> When an array access instruction is replaced before a switch instruction, and padding is added to align the switch, the array instruction remains, which is invalid:
> public void test();
>   Code:
>    Stack=2, Locals=2, Args_size=1
>    0:	aconst_null
>    1:	astore_1
>    2:	invokestatic	#17; //Method $SWITCH_TABLE$RULE_TYPE:()[I
>    5:	aload_1
>    6:	invokevirtual	#20; //Method RULE_TYPE.ordinal:()I
>    9:	invokestatic	#67; //Method arrayReadInt:(Ljava/lang/Object;I)I
>    12:	nop 
>    13:	iaload                               <=========================== INVALID!!!!!!!!!!!! 
>    14:	tableswitch{ //1 to 1
> 		1: 32;
> 		default: 32 }
>    32:	return
> This is typically caught by the bytecode verifier
>  java.lang.VerifyError: (class: com/lm/dataModel/rules/StatusRule, method: propagateFromHereOnUpTree signature: (Lcom/lm/dataModel/ANode;Lcom/lm/dataModel/ANode$Source;Lcom/lm/dataModel/ANode$StatusValue;)Z) Unable to pop operand off an empty stack
>      at com.lm.dataModel.ANode.setStatusValueWithPropagation(ANode.java:301)
>      at com.lm.seem.StatusTableModel.setValueAt(StatusTableModel.java:133)

-- 
This message is automatically generated by JIRA.
-
If you think it was sent incorrectly contact one of the administrators: https://jira.jboss.org/jira/secure/Administrators.jspa
-
For more information on JIRA, see: http://www.atlassian.com/software/jira