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From "Salikh Zakirov (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HARMONY-2798) [drlvm] VM cunit test test_native_basic sometimes crashes on win32 SMP
Date Wed, 17 Jan 2007 11:40:27 GMT

    [ https://issues.apache.org/jira/browse/HARMONY-2798?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12465423

Salikh Zakirov commented on HARMONY-2798:

In the above code snippet HEAP_NO_SERIALIZE should be 0, otherwise heap validation itself
will create data race on access to heap structures (e.g. malloc() vs HeapValidate()).

> [drlvm] VM cunit test test_native_basic sometimes crashes on win32 SMP
> ----------------------------------------------------------------------
>                 Key: HARMONY-2798
>                 URL: https://issues.apache.org/jira/browse/HARMONY-2798
>             Project: Harmony
>          Issue Type: Bug
>          Components: DRLVM
>         Environment: Windows 2003 server on P4 with HT enabled
>            Reporter: Gregory Shimansky
> The test test_native_basic fails on windows from time to time in 3 different ways. The
most common way is to exit silently on shutdown while function main has returned 0, and all
tests passed. Two other ways are access to non-writable memory and MS debug CRT heap validation
on shutdown.
> In all 3 cases I cannot debug the program because it fails after function main has finished.
Looks like some race condition causes memory corruption. Probably running the program from
under VS.NET could help to debug it.
> To run the test many times I've written the following script in cygwin bash:
> i=0; while true; do ./test_native_basic.exe -Dorg.apache.harmony.vm.vmdir=d:/work/harmony/enhanced/trunk/working_vm/build/win_ia32_msvc_debug/deploy/jdk/jre/bin/default
ec=$?; echo $i $ec; test $ec != 0 && break; i=$[i+1]; done
> Note, to run test_native_basic in console you need to set PATH to DRLVM bin and bin/default
> Note2, it looks like this bug requires SMP or at least HT enabled system, and is not
reproducible on single processor computers like laptops.

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