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From "Ilya Berezhniuk (JIRA)" <j...@apache.org>
Subject [jira] Created: (HARMONY-2531) [drlvm][jvmti] Incorrect code type when HWE occures on JIT breakpoint
Date Thu, 07 Dec 2006 22:37:21 GMT
[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
            Priority: Minor

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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