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Posted to commits@harmony.apache.org by "Xiao-Feng Li (JIRA)" <ji...@apache.org> on 2007/06/15 14:08:37 UTC
[jira] Assigned: (HARMONY-4167) [drlvm][gc_gen][tc] Race condition
at "gc_thread.h":(130-153) at allocator_init_free_block() and
alloc_context_reset() functions
[ https://issues.apache.org/jira/browse/HARMONY-4167?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Xiao-Feng Li reassigned HARMONY-4167:
-------------------------------------
Assignee: Xiao-Feng Li
> [drlvm][gc_gen][tc] Race condition at "gc_thread.h":(130-153) at allocator_init_free_block() and alloc_context_reset() functions
> --------------------------------------------------------------------------------------------------------------------------------
>
> Key: HARMONY-4167
> URL: https://issues.apache.org/jira/browse/HARMONY-4167
> Project: Harmony
> Issue Type: Bug
> Components: DRLVM
> Reporter: Ilya Leviev
> Assignee: Xiao-Feng Li
> Attachments: SourceViewScreenshot-1.jpg
>
>
> Race condition at "gc_thread.h":(130-153) at allocator_init_free_block() and alloc_context_reset() functions
> TC report on thread unsafe access that result in race condition that occur during concurrent execution of allocator_init_free_block() and alloc_context_reset() 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_thread.h":153 conflicts with a prior memory write at "gc_thread.h":130
> Stack Trace:
> Context
> Function void interpreter(struct StackFrame &) "interpreter.cpp":2931
> Function Opcode_INVOKESTATIC "interpreter.cpp":2104
> Function interpreterInvokeStatic "interpreter.cpp":3312
> Function void interpreterInvokeStaticNative(struct StackFrame &,struct StackFrame &,struct Method *) "interp_native_ia32.cpp":358
> Function invokeJNI "interp_native_ia32.cpp":49
> Function Java_java_lang_VMMemoryManager_runGC "java_lang_vmmemorymanager.cpp":138
> Function gc_force_gc "gc_for_vm.cpp":138
> Function void gc_reclaim_heap(struct GC *,unsigned int) "gc_common.cpp":300
> Function void gc_reset_mutator_context(struct GC *) "mutator.cpp":102
> Function void alloc_context_reset(struct Allocator *) "gc_thread.h":142
> Definition
> Function hythread_create_with_group "thread_native_basic.c":136
> Function os_thread_create "os_thread.c":37
> 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 wrapper_proc "thread_java_basic.c":82
> Function vm_attach "thread_generic.cpp":266
> Function gc_thread_init "gc_for_vm.cpp":152
> Function void mutator_initialize(struct GC *,void *) "mutator.cpp":30
> 1st Access
> Function void interpreter(struct StackFrame &) "interpreter.cpp":2844
> Function Opcode_NEW "interpreter.cpp":1254
> Function struct ManagedObject * class_alloc_new_object(struct Class *) "jit_runtime_support.cpp":2589
> Function struct ManagedObject * Class::allocate_instance(void) "class.cpp":478
> Function void * vm_alloc_and_report_ti(unsigned int,unsigned int,void *,struct Class *) "jvmti_event.cpp":1359
> Function gc_alloc "mutator_alloc.cpp":79
> Function void * nos_alloc(unsigned int,struct Allocator *) "gen.cpp":274
> Function void * fspace_alloc(unsigned int,struct Allocator *) "fspace_alloc.cpp":61
> Function fspace_alloc_block "fspace_alloc.cpp":40
> Function void allocator_init_free_block(struct Allocator *,struct Block_Header *) "gc_thread.h":130
> "129" "" " unsigned int zeroing_size = ZEROING_SIZE - GC_BLOCK_HEADER_SIZE_BYTES;"
> "130" "*" " allocator->ceiling = (void*)((POINTER_SIZE_INT)new_free + zeroing_size);"
> "131" "" " memset(new_free, 0, zeroing_size);"
> 2nd Access
> Function void interpreter(struct StackFrame &) "interpreter.cpp":2931
> Function Opcode_INVOKESTATIC "interpreter.cpp":2104
> Function interpreterInvokeStatic "interpreter.cpp":3312
> Function void interpreterInvokeStaticNative(struct StackFrame &,struct StackFrame &,struct Method *) "interp_native_ia32.cpp":358
> Function invokeJNI "interp_native_ia32.cpp":49
> Function Java_java_lang_VMMemoryManager_runGC "java_lang_vmmemorymanager.cpp":138
> Function gc_force_gc "gc_for_vm.cpp":138
> Function void gc_reclaim_heap(struct GC *,unsigned int) "gc_common.cpp":300
> Function void gc_reset_mutator_context(struct GC *) "mutator.cpp":102
> Function void alloc_context_reset(struct Allocator *) "gc_thread.h":153
> "152" "" " allocator->free = NULL;"
> "153" "*" " allocator->ceiling = NULL;"
> "154" "" " allocator->end = NULL;"
> See also Source View screenshots.
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