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Posted to commits@harmony.apache.org by "Gregory Shimansky (JIRA)" <ji...@apache.org> on 2007/06/07 20:21:26 UTC
[jira] Resolved: (HARMONY-4071) [drlvm][classloader][tc]
Known/proven race conditions markup at class.h:(1781/1782) at
instance_allocated function
[ https://issues.apache.org/jira/browse/HARMONY-4071?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gregory Shimansky resolved HARMONY-4071.
----------------------------------------
Resolution: Fixed
Patch applied at 545254. Please check that it works.
> [drlvm][classloader][tc] Known/proven race conditions markup at class.h:(1781/1782) at instance_allocated function
> ------------------------------------------------------------------------------------------------------------------
>
> Key: HARMONY-4071
> URL: https://issues.apache.org/jira/browse/HARMONY-4071
> Project: Harmony
> Issue Type: Bug
> Components: DRLVM
> Reporter: Ilya Leviev
> Assignee: Gregory Shimansky
> Attachments: HARMONY-4071_add_markup.patch, SourceViewScreenshot-1.jpg
>
>
> Known/proven race conditions markup at class.h:(1781/1782) at instance_allocated function
> TC report on thread unsafe access that result in race condition that occur during concurrent execution of instance_allocated function.
> As issues related to vm statistic data collection in debug mode I have marked it by special API for prevention of further alarms on this races.
> data-races
> 1)Write -> Write data-race
> Memory write at "class.h":1781 conflicts with a prior memory write at "class.h":1781
> 2)Write -> Write data-race
> Memory write at "class.h":1782 conflicts with a prior memory write at "class.h":1782
> Stack Trace:
> Context
> Function vm_get_gc_thread_local "c_interface.cpp":2414
> Function gc_alloc_fast "mutator_alloc.cpp":120
> Function struct ManagedObject * struct_Class_to_java_lang_Class(struct Class *) "class.cpp":778
> Function unsigned int class_is_subtype(struct Class *,struct Class *) "jit_runtime_support.cpp":3199
> Function class VM_thread * get_thread_ptr_stub(void) "thread_manager.cpp":138
> Function hythread_suspend_enable "hythread_ext.h":373
> Function Java_java_lang_VMMemoryManager_clone "java_lang_vmmemorymanager.cpp":59
> Function object_clone "object_generic.cpp":148
> Function struct ManagedObject * Class::allocate_instance(void) "class.cpp":486
> Function void Class::instance_allocated(unsigned int) "class.h":1780
> 1st Access
> Function gc_alloc_fast "mutator_alloc.cpp":120
> Function is_class_initialized "jit_runtime_support.cpp":702
> Function struct ManagedObject * struct_Class_to_java_lang_Class(struct Class *) "class.cpp":778
> Function unsigned int class_is_subtype(struct Class *,struct Class *) "jit_runtime_support.cpp":3199
> Function class VM_thread * get_thread_ptr_stub(void) "thread_manager.cpp":138
> Function hythread_suspend_enable "hythread_ext.h":373
> Function Java_java_lang_VMMemoryManager_clone "java_lang_vmmemorymanager.cpp":59
> Function object_clone "object_generic.cpp":148
> Function struct ManagedObject * Class::allocate_instance(void) "class.cpp":486
> Function void Class::instance_allocated(unsigned int) "class.h":1781
> "1,779" "" " * @param[in] size - a size of an allocated instance*/"
> "1,780" "" " void instance_allocated(unsigned size) {"
> "1,781" "*" " m_num_allocations++;"
> "1,782" "*" " m_num_bytes_allocated += size;"
> "1,783" "" " }"
> "1,784" "" " "
> 2nd Access
> Function vm_get_gc_thread_local "c_interface.cpp":2414
> Function gc_alloc_fast "mutator_alloc.cpp":120
> Function struct ManagedObject * struct_Class_to_java_lang_Class(struct Class *) "class.cpp":778
> Function unsigned int class_is_subtype(struct Class *,struct Class *) "jit_runtime_support.cpp":3199
> Function class VM_thread * get_thread_ptr_stub(void) "thread_manager.cpp":138
> Function hythread_suspend_enable "hythread_ext.h":373
> Function Java_java_lang_VMMemoryManager_clone "java_lang_vmmemorymanager.cpp":59
> Function object_clone "object_generic.cpp":148
> Function struct ManagedObject * Class::allocate_instance(void) "class.cpp":486
> Function void Class::instance_allocated(unsigned int) "class.h":1781
> "1,779" "" " * @param[in] size - a size of an allocated instance*/"
> "1,780" "" " void instance_allocated(unsigned size) {"
> "1,781" "*" " m_num_allocations++;"
> "1,782" "*" " m_num_bytes_allocated += size;"
> "1,783" "" " }"
> "1,784" "" " "
> See also Source View screenshot
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