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Posted to commits@harmony.apache.org by "Ilya Leviev (JIRA)" <ji...@apache.org> on 2007/05/28 19:21:15 UTC
[jira] Reopened: (HARMONY-3978) [drlvm][gc_gen] Race conditions at
"gc_common.h":175 and collector_alloc.h":76
[ https://issues.apache.org/jira/browse/HARMONY-3978?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Ilya Leviev reopened HARMONY-3978:
----------------------------------
patch that mark race by special API for prevention of further alarms should be applied
> [drlvm][gc_gen] Race conditions at "gc_common.h":175 and collector_alloc.h":76
> ------------------------------------------------------------------------------
>
> Key: HARMONY-3978
> URL: https://issues.apache.org/jira/browse/HARMONY-3978
> Project: Harmony
> Issue Type: Bug
> Components: DRLVM
> Reporter: Ilya Leviev
> Assignee: Xiao-Feng Li
> Attachments: HARMONY-3978_add_markup.patch, SourceViewScreenshot-1.jpg
>
>
> TC report on thread unsafe access that result in race condition that occur during concurrent execution of collector_forward_object and write_slot functions
> if it not affect correctness of execution I will mark it by special API for prevention of further alarms on this race.
> Write -> Write data-race
> Memory write at "gc_common.h":175 conflicts with a prior memory write at "collector_alloc.h":76
> Stack Trace:
> Context
> Function _beginthreadex "threadex.c":145
> Function EntryPoint "dllcrt0.c":323
> Function threadstartex "threadex.c":241
> Function thread_start_proc "thread_native_basic.c":711
> Function collector_thread_func "collector.cpp":181
> Function void nongen_forward_pool(struct Collector *) "fspace_nongen_forward_pool.cpp":220
> Function collector_trace_rootsets "fspace_nongen_forward_pool.cpp":178
> Function trace_object "fspace_nongen_forward_pool.cpp":123
> Function forward_object "fspace_nongen_forward_pool.cpp":115
> Function void write_slot(struct Partial_Reveal_Object * *,struct Partial_Reveal_Object *) "gc_common.h":175
> 1st Access
> Function _beginthreadex "threadex.c":145
> Function EntryPoint "dllcrt0.c":323
> Function threadstartex "threadex.c":241
> Function thread_start_proc "thread_native_basic.c":711
> Function collector_thread_func "collector.cpp":181
> Function void nongen_forward_pool(struct Collector *) "fspace_nongen_forward_pool.cpp":220
> Function collector_trace_rootsets "fspace_nongen_forward_pool.cpp":178
> Function trace_object "fspace_nongen_forward_pool.cpp":128
> Function forward_object "fspace_nongen_forward_pool.cpp":94
> Function struct Partial_Reveal_Object * collector_forward_object(struct Collector *,struct Partial_Reveal_Object *) "collector_alloc.h":76
> "74" "" " oi = trace_forward_process_hashcode(p_targ_obj, p_obj ,oi, size);"
> "75" "" " }else{"
> "76" "*" " memcpy(p_targ_obj, p_obj, size); "
> "77" "" " }"
> "78" "" " #else"
> 2nd Access
> Function _beginthreadex "threadex.c":145
> Function EntryPoint "dllcrt0.c":323
> Function threadstartex "threadex.c":241
> Function thread_start_proc "thread_native_basic.c":711
> Function collector_thread_func "collector.cpp":181
> Function void nongen_forward_pool(struct Collector *) "fspace_nongen_forward_pool.cpp":220
> Function collector_trace_rootsets "fspace_nongen_forward_pool.cpp":178
> Function trace_object "fspace_nongen_forward_pool.cpp":123
> Function forward_object "fspace_nongen_forward_pool.cpp":115
> Function void write_slot(struct Partial_Reveal_Object * *,struct Partial_Reveal_Object *) "gc_common.h":175
> "173" "" " "
> "174" "" " FORCE_INLINE void write_slot(REF *p_slot, Partial_Reveal_Object *p_obj)"
> "175" "*" " { *p_slot = obj_ptr_to_ref(p_obj); }"
> "176" "" " "
> "177" "" " "
> See also Source View screenshots.
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