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Date: Fri, 15 Dec 2006 03:52:23 -0800 (PST)
From: "Gregory Shimansky (JIRA)" <jira@apache.org>
To: commits@harmony.apache.org
Subject: [jira] Resolved: (HARMONY-2531) [drlvm][jvmti] Incorrect code type
 when HWE occures on JIT breakpoint
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     [ http://issues.apache.org/jira/browse/HARMONY-2531?page=all ]

Gregory Shimansky resolved HARMONY-2531.
----------------------------------------

    Resolution: Fixed

Patch applied at 487371. Please check that it was applied as expected.

> [drlvm][jvmti] Incorrect code type when HWE occures on JIT breakpoint
> ---------------------------------------------------------------------
>
>                 Key: HARMONY-2531
>                 URL: http://issues.apache.org/jira/browse/HARMONY-2531
>             Project: Harmony
>          Issue Type: Bug
>          Components: DRLVM
>         Environment: ia32
>            Reporter: Ilya Berezhniuk
>         Assigned To: Gregory Shimansky
>            Priority: Minor
>         Attachments: exception_in_buffer.lnx.patch, exception_in_buffer.win.patch
>
>
> When JVMTI breakpoint is occured in JITted code, execution is stopped on instrumented instruction. To continue execution, breakpoint handler copies original instruction to special buffer and executes it.
> When such instruction produces hardware exception, exception handler/signal handlers receive buffer address instead of original address and cannot detect code type correctly. So HWE in instrumented Java code is interpreted as HWE in native code.

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