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From "Alexey Varlamov (JIRA)" <j...@apache.org>
Subject [jira] Assigned: (HARMONY-3858) [drlvm][jit] Known/proven race conditions markup at \vm\vmcore\src\jit\jit_runtime_support.cpp(L367, L374)
Date Fri, 01 Jun 2007 09:02:16 GMT

     [ https://issues.apache.org/jira/browse/HARMONY-3858?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alexey Varlamov reassigned HARMONY-3858:
----------------------------------------

    Assignee: Alexey Varlamov

> [drlvm][jit] Known/proven race conditions markup at \vm\vmcore\src\jit\jit_runtime_support.cpp(L367,
L374)
> ----------------------------------------------------------------------------------------------------------
>
>                 Key: HARMONY-3858
>                 URL: https://issues.apache.org/jira/browse/HARMONY-3858
>             Project: Harmony
>          Issue Type: Bug
>          Components: DRLVM
>            Reporter: Ilya Leviev
>            Assignee: Alexey Varlamov
>            Priority: Minor
>         Attachments: HARMONY-3858_add_markup.patch, screenshot-1.jpg
>
>
> There are thread unsafe access that result in race condition that occur during concurrent
execution of rth_update_checkcast_stats function 
> As issues related to vm statistic data collection and it not affect correctness of execution
I mark it by special API for prevention of further alarms on this race.
> Write -> Write data-race	
> Memory write at "jit_runtime_support.cpp":367 conflicts with a prior memory write at
"jit_runtime_support.cpp":367
> Stack Traces1: 
> Context
> 	Function vm_invoke_native_array_stub "ini_ia32.cpp":76
> 	Function class VM_thread * get_thread_ptr_stub(void) "thread_manager.cpp":138
> 	Function m2n_free_local_handles "m2n_ia32.cpp":268
> 	Function class VM_thread * get_thread_ptr_stub(void) "thread_manager.cpp":138
> 	Function m2n_free_local_handles "m2n_ia32.cpp":268
> 	Function hythread_thin_monitor_try_enter "thread_native_thin_monitor.c":341
> 	Function class VM_thread * get_thread_ptr_stub(void) "thread_manager.cpp":138
> 	Function jthread_monitor_enter "thread_java_monitors.c":157
> 	Function m2n_free_local_handles "m2n_ia32.cpp":268
> 	Function rth_update_checkcast_stats "jit_runtime_support.cpp":366
> 1st Access
> 	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 class VM_thread * get_thread_ptr_stub(void) "thread_manager.cpp":138
> 	Function m2n_free_local_handles "m2n_ia32.cpp":268
> 	Function class VM_thread * get_thread_ptr_stub(void) "thread_manager.cpp":138
> 	Function m2n_free_local_handles "m2n_ia32.cpp":268
> 	Function hythread_thin_monitor_try_enter "thread_native_thin_monitor.c":341
> 	Function class VM_thread * get_thread_ptr_stub(void) "thread_manager.cpp":138
> 	Function m2n_free_local_handles "m2n_ia32.cpp":268
> 	Function rth_update_checkcast_stats "jit_runtime_support.cpp":367
> 2nd Access
> 	Function vm_invoke_native_array_stub "ini_ia32.cpp":76
> 	Function class VM_thread * get_thread_ptr_stub(void) "thread_manager.cpp":138
> 	Function m2n_free_local_handles "m2n_ia32.cpp":268
> 	Function class VM_thread * get_thread_ptr_stub(void) "thread_manager.cpp":138
> 	Function m2n_free_local_handles "m2n_ia32.cpp":268
> 	Function hythread_thin_monitor_try_enter "thread_native_thin_monitor.c":341
> 	Function class VM_thread * get_thread_ptr_stub(void) "thread_manager.cpp":138
> 	Function jthread_monitor_enter "thread_java_monitors.c":157
> 	Function m2n_free_local_handles "m2n_ia32.cpp":268
> 	Function rth_update_checkcast_stats "jit_runtime_support.cpp":367
> ""	"365"	""	" static void rth_update_checkcast_stats(ManagedObject* o, Class* super)"
> "0x890F0"	"366"	""	" {"
> "0x89107"	"367"	"*"	"     VM_Statistics::get_vm_stats().num_checkcast ++;"
> "0x8912A"	"368"	""	"     if (o == (ManagedObject*)VM_Global_State::loader_env->managed_null)
{"
> "0x8913B"	"369"	"*"	"         VM_Statistics::get_vm_stats().num_checkcast_null++;"
> "0x8915E"	"370"	""	"     } else {"
> "0x89160"	"371"	""	"         if (o->vt()->clss == super)"
> Write -> Write data-race	
> Memory write at "jit_runtime_support.cpp":369 conflicts with a prior memory write at
"jit_runtime_support.cpp":369
> Stack Traces 2: 
> Context
> 	Function m2n_free_local_handles "m2n_ia32.cpp":268
> 	Function vm_get_gc_thread_local "c_interface.cpp":2334
> 	Function gc_alloc_fast "gc_for_vm.cpp":178
> 	Function vm_get_gc_thread_local "c_interface.cpp":2334
> 	Function gc_alloc_fast "gc_for_vm.cpp":178
> 	Function is_class_initialized "jit_runtime_support.cpp":702
> 	Function class VM_thread * get_thread_ptr_stub(void) "thread_manager.cpp":138
> 	Function hythread_suspend_disable "hythread_ext.h":421
> 	Function m2n_pop_local_handles "m2n_ia32.cpp":257
> 	Function rth_update_checkcast_stats "jit_runtime_support.cpp":366
> 1st Access
> 	Function class VM_thread * get_thread_ptr_stub(void) "thread_manager.cpp":138
> 	Function hythread_self "hythread.h":465
> 	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 rth_get_interface_vtable "jit_runtime_support.cpp":651
> 	Function hythread_self "hythread.h":465
> 	Function rth_update_checkcast_stats "jit_runtime_support.cpp":369
> 2nd Access
> 	Function m2n_free_local_handles "m2n_ia32.cpp":268
> 	Function vm_get_gc_thread_local "c_interface.cpp":2334
> 	Function gc_alloc_fast "gc_for_vm.cpp":178
> 	Function vm_get_gc_thread_local "c_interface.cpp":2334
> 	Function gc_alloc_fast "gc_for_vm.cpp":178
> 	Function is_class_initialized "jit_runtime_support.cpp":702
> 	Function class VM_thread * get_thread_ptr_stub(void) "thread_manager.cpp":138
> 	Function hythread_suspend_disable "hythread_ext.h":421
> 	Function m2n_pop_local_handles "m2n_ia32.cpp":257
> 	Function rth_update_checkcast_stats "jit_runtime_support.cpp":369

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