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Posted to commits@harmony.apache.org by "Sergey Salishev (JIRA)" <ji...@apache.org> on 2007/05/17 13:49:16 UTC
[jira] Created: (HARMONY-3892) Deadlock during thread creation from
custom sytem classloader
Deadlock during thread creation from custom sytem classloader
-------------------------------------------------------------
Key: HARMONY-3892
URL: https://issues.apache.org/jira/browse/HARMONY-3892
Project: Harmony
Issue Type: Bug
Components: DRLVM
Environment: Windows, Linux
Reporter: Sergey Salishev
Attachments: ClassLoader0.java
The deadlock manifests when running the attached testcase with
java -Djava.system.class.loader=ClassLoader0 bla
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[jira] Commented: (HARMONY-3892) [drlvm][thread] Deadlock during
thread creation from custom sytem classloader
Posted by "Gregory Shimansky (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HARMONY-3892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12497882 ]
Gregory Shimansky commented on HARMONY-3892:
--------------------------------------------
I think there is no reason to load a class when we already have an instance object of it. Class loading always does lookup through class loader's tables while GetObjectClass simply retrieves the pointer to VT. It is more effective IMHO.
> [drlvm][thread] Deadlock during thread creation from custom sytem classloader
> -----------------------------------------------------------------------------
>
> Key: HARMONY-3892
> URL: https://issues.apache.org/jira/browse/HARMONY-3892
> Project: Harmony
> Issue Type: Bug
> Components: DRLVM
> Environment: Windows, Linux
> Reporter: Sergey Salishev
> Assigned To: Gregory Shimansky
> Attachments: ClassLoader0.java, H3892.patch
>
>
> The deadlock manifests when running the attached testcase with
> java -Djava.system.class.loader=ClassLoader0 bla
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[jira] Closed: (HARMONY-3892) [drlvm][thread] Deadlock during
thread creation from custom sytem classloader
Posted by "Gregory Shimansky (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HARMONY-3892?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gregory Shimansky closed HARMONY-3892.
--------------------------------------
No response, assuming ok.
> [drlvm][thread] Deadlock during thread creation from custom sytem classloader
> -----------------------------------------------------------------------------
>
> Key: HARMONY-3892
> URL: https://issues.apache.org/jira/browse/HARMONY-3892
> Project: Harmony
> Issue Type: Bug
> Components: DRLVM
> Environment: Windows, Linux
> Reporter: Sergey Salishev
> Assignee: Gregory Shimansky
> Attachments: ClassLoader0.java, H3892.patch
>
>
> The deadlock manifests when running the attached testcase with
> java -Djava.system.class.loader=ClassLoader0 bla
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[jira] Updated: (HARMONY-3892) [drlvm][thread] Deadlock during
thread creation from custom sytem classloader
Posted by "Pavel Pervov (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HARMONY-3892?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Pavel Pervov updated HARMONY-3892:
----------------------------------
Attachment: H3892.patch
This patch is to fix the issue.
The idea is simple: since we have thread object, there is no need to FindClass - we can GetObjectClass from that thread object.
> [drlvm][thread] Deadlock during thread creation from custom sytem classloader
> -----------------------------------------------------------------------------
>
> Key: HARMONY-3892
> URL: https://issues.apache.org/jira/browse/HARMONY-3892
> Project: Harmony
> Issue Type: Bug
> Components: DRLVM
> Environment: Windows, Linux
> Reporter: Sergey Salishev
> Attachments: ClassLoader0.java, H3892.patch
>
>
> The deadlock manifests when running the attached testcase with
> java -Djava.system.class.loader=ClassLoader0 bla
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[jira] Updated: (HARMONY-3892) [drlvm][thread] Deadlock during
thread creation from custom sytem classloader
Posted by "Gregory Shimansky (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HARMONY-3892?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gregory Shimansky updated HARMONY-3892:
---------------------------------------
Patch Info: [Patch Available]
Assignee: Gregory Shimansky
> [drlvm][thread] Deadlock during thread creation from custom sytem classloader
> -----------------------------------------------------------------------------
>
> Key: HARMONY-3892
> URL: https://issues.apache.org/jira/browse/HARMONY-3892
> Project: Harmony
> Issue Type: Bug
> Components: DRLVM
> Environment: Windows, Linux
> Reporter: Sergey Salishev
> Assigned To: Gregory Shimansky
> Attachments: ClassLoader0.java, H3892.patch
>
>
> The deadlock manifests when running the attached testcase with
> java -Djava.system.class.loader=ClassLoader0 bla
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[jira] Commented: (HARMONY-3892) [drlvm][thread] Deadlock during
thread creation from custom sytem classloader
Posted by "Pavel Pervov (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HARMONY-3892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12497786 ]
Pavel Pervov commented on HARMONY-3892:
---------------------------------------
This is the deadlock between ClassLoader0 and ClassLoader0 which occurs through thread starting code.
_alarmThread.start() calls Thread.lock.wait() inside synchronized ClassLoader0 and waits until target thread is started. Thread starting code calls to FindClass("java/lang/Thread") which in turn calls to ClassLoader0.loadClass.
Looks like I know the way. :) Will try to fix fast.
> [drlvm][thread] Deadlock during thread creation from custom sytem classloader
> -----------------------------------------------------------------------------
>
> Key: HARMONY-3892
> URL: https://issues.apache.org/jira/browse/HARMONY-3892
> Project: Harmony
> Issue Type: Bug
> Components: DRLVM
> Environment: Windows, Linux
> Reporter: Sergey Salishev
> Attachments: ClassLoader0.java
>
>
> The deadlock manifests when running the attached testcase with
> java -Djava.system.class.loader=ClassLoader0 bla
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[jira] Updated: (HARMONY-3892) Deadlock during thread creation from
custom sytem classloader
Posted by "Sergey Salishev (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HARMONY-3892?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sergey Salishev updated HARMONY-3892:
-------------------------------------
Attachment: ClassLoader0.java
> Deadlock during thread creation from custom sytem classloader
> -------------------------------------------------------------
>
> Key: HARMONY-3892
> URL: https://issues.apache.org/jira/browse/HARMONY-3892
> Project: Harmony
> Issue Type: Bug
> Components: DRLVM
> Environment: Windows, Linux
> Reporter: Sergey Salishev
> Attachments: ClassLoader0.java
>
>
> The deadlock manifests when running the attached testcase with
> java -Djava.system.class.loader=ClassLoader0 bla
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[jira] Resolved: (HARMONY-3892) [drlvm][thread] Deadlock during
thread creation from custom sytem classloader
Posted by "Gregory Shimansky (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HARMONY-3892?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gregory Shimansky resolved HARMONY-3892.
----------------------------------------
Resolution: Fixed
Patch applied at 540700. The attached class loader seems to work ok now.
> [drlvm][thread] Deadlock during thread creation from custom sytem classloader
> -----------------------------------------------------------------------------
>
> Key: HARMONY-3892
> URL: https://issues.apache.org/jira/browse/HARMONY-3892
> Project: Harmony
> Issue Type: Bug
> Components: DRLVM
> Environment: Windows, Linux
> Reporter: Sergey Salishev
> Assigned To: Gregory Shimansky
> Attachments: ClassLoader0.java, H3892.patch
>
>
> The deadlock manifests when running the attached testcase with
> java -Djava.system.class.loader=ClassLoader0 bla
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[jira] Commented: (HARMONY-3892) [drlvm][thread] Deadlock during
thread creation from custom sytem classloader
Posted by "Alexey Varlamov (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HARMONY-3892?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12497855 ]
Alexey Varlamov commented on HARMONY-3892:
------------------------------------------
Nifty hack ;)
Is there such a strong design limitation to not ever use OPEN headers in TM?
Otherwise class_load_class_by_name_using_bootstrap_class_loader() should work much better?
> [drlvm][thread] Deadlock during thread creation from custom sytem classloader
> -----------------------------------------------------------------------------
>
> Key: HARMONY-3892
> URL: https://issues.apache.org/jira/browse/HARMONY-3892
> Project: Harmony
> Issue Type: Bug
> Components: DRLVM
> Environment: Windows, Linux
> Reporter: Sergey Salishev
> Attachments: ClassLoader0.java, H3892.patch
>
>
> The deadlock manifests when running the attached testcase with
> java -Djava.system.class.loader=ClassLoader0 bla
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[jira] Updated: (HARMONY-3892) [drlvm][thread] Deadlock during
thread creation from custom sytem classloader
Posted by "Gregory Shimansky (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HARMONY-3892?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gregory Shimansky updated HARMONY-3892:
---------------------------------------
Summary: [drlvm][thread] Deadlock during thread creation from custom sytem classloader (was: Deadlock during thread creation from custom sytem classloader)
> [drlvm][thread] Deadlock during thread creation from custom sytem classloader
> -----------------------------------------------------------------------------
>
> Key: HARMONY-3892
> URL: https://issues.apache.org/jira/browse/HARMONY-3892
> Project: Harmony
> Issue Type: Bug
> Components: DRLVM
> Environment: Windows, Linux
> Reporter: Sergey Salishev
> Attachments: ClassLoader0.java
>
>
> The deadlock manifests when running the attached testcase with
> java -Djava.system.class.loader=ClassLoader0 bla
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