2017-03-27 149 views
0

使用共享內存中存儲的rwlock對象的同一進程中的兩個線程在pthreads壓力測試期間遇到崩潰。我花了一段時間試圖找到內存腐敗或僵局,但迄今爲止沒有。這只是一種不太理想的方式來告訴我我已經創造了一個僵局?調試這個工具/方法的任何指針?futex設施返回了一個意外的錯誤代碼?

 
Thread 5 "tms_test" received signal SIGABRT, Aborted. 
[Switching to Thread 0x7ffff28a7700 (LWP 3777)] 
0x00007ffff761e428 in __GI_raise (sig=[email protected]=6) at ../sysdeps/unix/sysv/linux/raise.c:54 
54 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory. 
(gdb) bt 
#0 0x00007ffff761e428 in __GI_raise ([email protected]=6) at ../sysdeps/unix/sysv/linux/raise.c:54 
#1 0x00007ffff762002a in __GI_abort() at abort.c:89 
#2 0x00007ffff76607ea in __libc_message ([email protected]=1, [email protected]=0x7ffff77776cc "%s") at ../sysdeps/posix/libc_fatal.c:175 
#3 0x00007ffff766080e in __GI___libc_fatal ([email protected]=0x7ffff79c4ae0 "The futex facility returned an unexpected error code.") at ../sysdeps/posix/libc_fatal.c:185 
#4 0x00007ffff79be7e5 in futex_fatal_error() at ../sysdeps/nptl/futex-internal.h:200 
#5 futex_wait (private=, expected=, futex_word=0x7ffff7f670d9) at ../sysdeps/unix/sysv/linux/futex-internal.h:77 
#6 futex_wait_simple (private=, expected=, futex_word=0x7ffff7f670d9) at ../sysdeps/nptl/futex-internal.h:135 
#7 __pthread_rwlock_wrlock_slow (rwlock=0x7ffff7f670cd) at pthread_rwlock_wrlock.c:67 
#8 0x00000000004046e3 in _memstat (offset=0x7fffdc0b11a5, func=0x0, lineno=0, size=134, flag=1 '\001') at tms_mem.c:107 
#9 0x000000000040703b in TmsMemReallocExec (in=0x7fffdc0abb81, size=211, func=0x43f858 "_malloc_thread", lineno=478) at tms_mem.c:390 
#10 0x000000000042a008 in _malloc_thread (arg=0x644c11) at tms_test.c:478 
#11 0x000000000041a1d6 in _threadStarter (arg=0x644c51) at tms_mem.c:2384 
#12 0x00007ffff79b96ba in start_thread (arg=0x7ffff28a7700) at pthread_create.c:333 
#13 0x00007ffff76ef82d in clone() at ../sysdeps/unix/sysv/linux/x86_64/clone.S:109 
(gdb) 

回答

0

調試一些沒有很好記錄的東西很難。我試圖找到有關「Futex設施返回一個意外的錯誤代碼」的任何有用的信息,但它似乎沒有在futex文檔中指定。 在我的情況下,此消息是由sem_wait(sem)生成的,其中sem無效sem_t指針。我在用sem_init(sem,1,1)初始化sem之後意外地覆蓋了它(由sem指向的內存)和一些隨機整數。 嘗試檢查您是否將有效指針傳遞給鎖定功能。