harmony-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "weldon washburn (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HARMONY-3896) [drlvm][thread] Race condition at thread_java_monitors.c":345 and thread_native_suspend.c":189
Date Sun, 20 May 2007 17:49:16 GMT

    [ https://issues.apache.org/jira/browse/HARMONY-3896?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12497272
] 

weldon washburn commented on HARMONY-3896:
------------------------------------------

I suspect this bug will be fixed during the cleanup of the native and java data structs that
hold thread state.

> [drlvm][thread] Race condition at thread_java_monitors.c":345 and thread_native_suspend.c":189
> ----------------------------------------------------------------------------------------------
>
>                 Key: HARMONY-3896
>                 URL: https://issues.apache.org/jira/browse/HARMONY-3896
>             Project: Harmony
>          Issue Type: Bug
>          Components: DRLVM
>            Reporter: Ilya Leviev
>         Assigned To: weldon washburn
>         Attachments: Source_View_Screenshot-1.jpg
>
>
> [drlvm][thread] Race condition at thread_java_monitors.c":345 and thread_native_suspend.c":189
> TC report on thread unsafe access to "state" field that result in race condition that
occur during concurrent execution of jthread_monitor_timed_wait and wait_safe_region_event
functions.
> Write -> Write data-race	
> Memory write at "thread_native_suspend.c":189 conflicts with a prior memory write at
"thread_java_monitors.c":345
> Stack Trace: 
> Context
> 	Function void vm_execute_java_method_array(struct _jmethodID *,union jvalue *,union
jvalue *) "ini.cpp":60
> 	Function ExecuteMethod "em_intf.cpp":43
> 	Function void DrlEMImpl::executeMethod(struct _jmethodID *,union jvalue *,union jvalue
*) "drlemimpl.cpp":509
> 	Function void JIT_execute_method_default(void *,struct _jmethodID *,union jvalue *,union
jvalue *) "ini_ia32.cpp":199
> 	Function vm_invoke_native_array_stub "ini_ia32.cpp":76
> 	Function hythread_thin_monitor_exit "thread_native_thin_monitor.c":416
> 	Function hythread_thin_monitor_try_enter "thread_native_thin_monitor.c":323
> 	Function unreserve_lock "thread_native_thin_monitor.c":162
> 	Function hythread_suspend_other "thread_native_suspend.c":255
> 	Function wait_safe_region_event "thread_native_suspend.c":169
> 1st Access
> 	Function class VM_thread * get_thread_ptr_stub(void) "thread_manager.cpp":138
> 	Function m2n_free_local_handles "m2n_ia32.cpp":268
> 	Function hythread_self "hythread.h":465
> 	Function vm_get_gc_thread_local "c_interface.cpp":2334
> 	Function gc_alloc_fast "gc_for_vm.cpp":178
> 	Function hythread_self "hythread.h":465
> 	Function class VM_thread * get_thread_ptr_stub(void) "thread_manager.cpp":138
> 	Function hythread_suspend_enable "hythread_ext.h":370
> 	Function Java_java_lang_VMThreadManager_wait "java_lang_vmthreadmanager.cpp":202
> 	Function jthread_monitor_timed_wait "thread_java_monitors.c":345
> function jthread_monitor_timed_wait "thread_java_monitors.c":345
> "343"	""	"        tm_native_thread->state &= ~TM_THREAD_STATE_WAITING_INDEFINITELY;"
> "344"	""	"     }"
> "345"	"*"	"     tm_native_thread->state |= TM_THREAD_STATE_RUNNABLE;"  
> "346"	""	" "
> 2nd Access
> 	Function void vm_execute_java_method_array(struct _jmethodID *,union jvalue *,union
jvalue *) "ini.cpp":60
> 	Function ExecuteMethod "em_intf.cpp":43
> 	Function void DrlEMImpl::executeMethod(struct _jmethodID *,union jvalue *,union jvalue
*) "drlemimpl.cpp":509
> 	Function void JIT_execute_method_default(void *,struct _jmethodID *,union jvalue *,union
jvalue *) "ini_ia32.cpp":199
> 	Function vm_invoke_native_array_stub "ini_ia32.cpp":76
> 	Function hythread_thin_monitor_exit "thread_native_thin_monitor.c":416
> 	Function hythread_thin_monitor_try_enter "thread_native_thin_monitor.c":323
> 	Function unreserve_lock "thread_native_thin_monitor.c":162
> 	Function hythread_suspend_other "thread_native_suspend.c":255
> 	Function wait_safe_region_event "thread_native_suspend.c":189
> function wait_safe_region_event "thread_native_suspend.c":189
> "187"	""	"            thread, thread->suspend_count, thread->request));"
> "188"	""	"     hymutex_lock(&thread->mutex);"
> "189"	"*"	"     thread->state |= TM_THREAD_STATE_SUSPENDED;"
> "190"	""	"     hymutex_unlock(&thread->mutex);"
> "191"	""	"     return TM_ERROR_NONE;"
> If it not affect correctness of execution I will mark it by special API for prevention
of further alarms on this race. 

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message