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Posted to commits@harmony.apache.org by "Alex Astapchuk (JIRA)" <ji...@apache.org> on 2007/02/07 07:54:05 UTC
[jira] Created: (HARMONY-3129) [drlvm][intel64][lil]race condition
and buffer overruns in LIL codegen
[drlvm][intel64][lil]race condition and buffer overruns in LIL codegen
----------------------------------------------------------------------
Key: HARMONY-3129
URL: https://issues.apache.org/jira/browse/HARMONY-3129
Project: Harmony
Issue Type: Bug
Components: DRLVM
Reporter: Alex Astapchuk
Attachments: 0001-drlvm-intel64-lil-race-condition-and-buffer-overruns-in-LIL-codegen.txt
There were 2 problems in LIL codegen for Intel64:
1. A code for temporary register usage had a static variable shared across all threads.
This lead to a race condition during compilations, and might lead to crash or unpredictable behavior.
Now, the code uses per-compilation variables.
2. A fixed size for temporary buffer was used which sometimes lead to buffer overruns for huge stubs (e.g. for JNI stub with a really huge number of args).
Now, the buffer size is estimated basing on the stub size.
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[jira] Updated: (HARMONY-3129) [drlvm][intel64][lil]race condition
and buffer overruns in LIL codegen
Posted by "Alex Astapchuk (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HARMONY-3129?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Alex Astapchuk updated HARMONY-3129:
------------------------------------
Attachment: 0001-drlvm-intel64-lil-race-condition-and-buffer-overruns-in-LIL-codegen.txt
> [drlvm][intel64][lil]race condition and buffer overruns in LIL codegen
> ----------------------------------------------------------------------
>
> Key: HARMONY-3129
> URL: https://issues.apache.org/jira/browse/HARMONY-3129
> Project: Harmony
> Issue Type: Bug
> Components: DRLVM
> Reporter: Alex Astapchuk
> Attachments: 0001-drlvm-intel64-lil-race-condition-and-buffer-overruns-in-LIL-codegen.txt
>
>
> There were 2 problems in LIL codegen for Intel64:
> 1. A code for temporary register usage had a static variable shared across all threads.
> This lead to a race condition during compilations, and might lead to crash or unpredictable behavior.
> Now, the code uses per-compilation variables.
> 2. A fixed size for temporary buffer was used which sometimes lead to buffer overruns for huge stubs (e.g. for JNI stub with a really huge number of args).
> Now, the buffer size is estimated basing on the stub size.
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[jira] Resolved: (HARMONY-3129) [drlvm][intel64][lil]race condition
and buffer overruns in LIL codegen
Posted by "Alexey Varlamov (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HARMONY-3129?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Alexey Varlamov resolved HARMONY-3129.
--------------------------------------
Resolution: Fixed
Applied at r504526, thanks!
> [drlvm][intel64][lil]race condition and buffer overruns in LIL codegen
> ----------------------------------------------------------------------
>
> Key: HARMONY-3129
> URL: https://issues.apache.org/jira/browse/HARMONY-3129
> Project: Harmony
> Issue Type: Bug
> Components: DRLVM
> Reporter: Alex Astapchuk
> Assigned To: Alexey Varlamov
> Attachments: 0001-drlvm-intel64-lil-race-condition-and-buffer-overruns-in-LIL-codegen.txt
>
>
> There were 2 problems in LIL codegen for Intel64:
> 1. A code for temporary register usage had a static variable shared across all threads.
> This lead to a race condition during compilations, and might lead to crash or unpredictable behavior.
> Now, the code uses per-compilation variables.
> 2. A fixed size for temporary buffer was used which sometimes lead to buffer overruns for huge stubs (e.g. for JNI stub with a really huge number of args).
> Now, the buffer size is estimated basing on the stub size.
--
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You can reply to this email to add a comment to the issue online.
[jira] Assigned: (HARMONY-3129) [drlvm][intel64][lil]race condition
and buffer overruns in LIL codegen
Posted by "Alexey Varlamov (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HARMONY-3129?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Alexey Varlamov reassigned HARMONY-3129:
----------------------------------------
Assignee: Alexey Varlamov
> [drlvm][intel64][lil]race condition and buffer overruns in LIL codegen
> ----------------------------------------------------------------------
>
> Key: HARMONY-3129
> URL: https://issues.apache.org/jira/browse/HARMONY-3129
> Project: Harmony
> Issue Type: Bug
> Components: DRLVM
> Reporter: Alex Astapchuk
> Assigned To: Alexey Varlamov
> Attachments: 0001-drlvm-intel64-lil-race-condition-and-buffer-overruns-in-LIL-codegen.txt
>
>
> There were 2 problems in LIL codegen for Intel64:
> 1. A code for temporary register usage had a static variable shared across all threads.
> This lead to a race condition during compilations, and might lead to crash or unpredictable behavior.
> Now, the code uses per-compilation variables.
> 2. A fixed size for temporary buffer was used which sometimes lead to buffer overruns for huge stubs (e.g. for JNI stub with a really huge number of args).
> Now, the buffer size is estimated basing on the stub size.
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