[9] RFR(S): 8148752: Compiled StringBuilder code throws StringIndexOutOfBoundsException

[Christian Thalinger]

Ouch.  Gotta hate long/double-slots.  Thanks for fixing my bug.

> On Feb 9, 2016, at 2:01 AM, Tobias Hartmann <tobias.hartmann at oracle.com> wrote:
> 
> Hi,
> 
> please review the following patch.
> 
> https://bugs.openjdk.java.net/browse/JDK-8148752
> http://cr.openjdk.java.net/~thartmann/8148752/webrev.00/
> 
> GraphBuilder::try_method_handle_inline() handles long and double arguments incorrectly when casting them to their actual type. Long/double arguments occupy two slots (see Parse::do_get_xxx() -> push_pair()). Currently, these two slots are treated as two individual arguments, causing incorrect casting of arguments.
> 
> In this case, an Object argument is casted to String and therefore being used as a String (although it's actually of type 'ResolvedJavaMethod'). We later fail by throwing exceptions in compiled code. For a detailed evaluation see my comments in the bug [1].
> 
> We should handle this like C1 does in GraphBuilder::try_method_handle_inline().
> 
> Thanks,
> Tobias
> 
> [1] https://bugs.openjdk.java.net/browse/JDK-8148752?focusedCommentId=13896557&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13896557