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Posted to commits@harmony.apache.org by "Ilya Leviev (JIRA)" <ji...@apache.org> on 2007/05/31 16:45:16 UTC
[jira] Updated: (HARMONY-4015) [drlvm][classloader][tc]
Known/proven race conditions markup at "class.cpp" at func
helper_get_interface_vtable() (499-514)
[ https://issues.apache.org/jira/browse/HARMONY-4015?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ilya Leviev updated HARMONY-4015:
---------------------------------
Attachment: HARMONY-4015_add_markup.patch
> [drlvm][classloader][tc] Known/proven race conditions markup at "class.cpp" at func helper_get_interface_vtable() (499-514)
> ---------------------------------------------------------------------------------------------------------------------------
>
> Key: HARMONY-4015
> URL: https://issues.apache.org/jira/browse/HARMONY-4015
> Project: Harmony
> Issue Type: Bug
> Components: DRLVM
> Reporter: Ilya Leviev
> Attachments: HARMONY-4015_add_markup.patch
>
>
> Known/proven race conditions markup at "class.cpp" at func helper_get_interface_vtable() (499-514)
> TC report on thread unsafe access that result in race conditions that occur during concurrent execution of helper_get_interface_vtable function.
> As issues related to vm statistic data collection in debug mode and it not affect correctness of execution I have marked it by special API for prevention of further alarms on this race.
> Race conditions:
> 1) Write -> Write data-race
> Memory write at "class.cpp":499 conflicts with a prior memory write at "class.cpp":499
> 2) Write -> Write data-race
> Memory write at "class.cpp":501 conflicts with a prior memory write at "class.cpp":501
> 3) Write -> Write data-race
> Memory write at "class.cpp":503 conflicts with a prior memory write at "class.cpp":503
> 4) Write -> Write data-race
> Memory write at "class.cpp":514 conflicts with a prior memory write at "class.cpp":514
> Stack Trace:
> Context
> Function void CallVoidMethodA(struct JNIEnv_External *,struct _jobject *,struct _jmethodID *,union jvalue *) "jni_method.cpp":225
> Function call_method_no_ref_result "jni_method.cpp":187
> 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":436
> Function rth_get_interface_vtable "jit_runtime_support.cpp":650
> Function void * Class::helper_get_interface_vtable(struct ManagedObject *,struct Class *) "class.cpp":494
> 1st Access
> Function class VM_thread * get_thread_ptr_stub(void) "thread_manager.cpp":138
> Function vm_get_gc_thread_local "c_interface.cpp":2414
> Function m2n_free_local_handles "m2n_ia32.cpp":268
> Function vm_get_gc_thread_local "c_interface.cpp":2414
> Function gc_alloc_fast "mutator_alloc.cpp":120
> Function class VM_thread * get_thread_ptr_stub(void) "thread_manager.cpp":138
> Function m2n_free_local_handles "m2n_ia32.cpp":268
> Function vm_get_gc_thread_local "c_interface.cpp":2414
> Function rth_get_interface_vtable "jit_runtime_support.cpp":650
> Function void * Class::helper_get_interface_vtable(struct ManagedObject *,struct Class *) "class.cpp":499
> "497" "" " unsigned num_intfc = intfTable->n_entries;"
> "498" "" " #ifdef VM_STATS"
> "499" "*" " VM_Statistics::get_vm_stats().num_invokeinterface_calls++;"
> "500" "" " switch(num_intfc) {"
> "501" "*" " case 1: VM_Statistics::get_vm_stats().num_invokeinterface_calls_size_1++; break;"
> "502" "" " case 2: VM_Statistics::get_vm_stats().num_invokeinterface_calls_size_2++; break;"
> "503" "*" " default: VM_Statistics::get_vm_stats().num_invokeinterface_calls_size_many++; break;"
> "504" "" " }"
> "505" "" " if(num_intfc > VM_Statistics::get_vm_stats().invokeinterface_calls_size_max)"
> "506" "" " VM_Statistics::get_vm_stats().invokeinterface_calls_size_max = num_intfc;"
> 2nd Access
> Function void CallVoidMethodA(struct JNIEnv_External *,struct _jobject *,struct _jmethodID *,union jvalue *) "jni_method.cpp":225
> Function call_method_no_ref_result "jni_method.cpp":187
> 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":436
> Function rth_get_interface_vtable "jit_runtime_support.cpp":650
> Function void * Class::helper_get_interface_vtable(struct ManagedObject *,struct Class *) "class.cpp":499
> "497" "" " unsigned num_intfc = intfTable->n_entries;"
> "498" "" " #ifdef VM_STATS"
> "499" "*" " VM_Statistics::get_vm_stats().num_invokeinterface_calls++;"
> "500" "" " switch(num_intfc) {"
> "501" "*" " case 1: VM_Statistics::get_vm_stats().num_invokeinterface_calls_size_1++; break;"
> "502" "" " case 2: VM_Statistics::get_vm_stats().num_invokeinterface_calls_size_2++; break;"
> "503" "*" " default: VM_Statistics::get_vm_stats().num_invokeinterface_calls_size_many++; break;"
> "504" "" " }"
> "505" "" " if(num_intfc > VM_Statistics::get_vm_stats().invokeinterface_calls_size_max)"
> "506" "" " VM_Statistics::get_vm_stats().invokeinterface_calls_size_max = num_intfc;"
> See also Source View screenshots.
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