链接jemalloc后可能会有死锁的问题 #859
Description
Describe the bug (描述bug)
jemalloc在申请内存时会有lock/unlock操作，brpc劫持了pthread_mutex_unlock函数后在submit_contention里面又有内存操作，导致出现死锁。
To Reproduce (复现方法)
在内存操作时有小概率出现。
Expected behavior (期望行为)
Versions (各种版本)
OS: centos 5.7
Compiler: CC=/usr/local/gcc-4.9.2/bin/gcc CXXFLAGS='-gdwarf-2'
brpc: 3becc72
protobuf:2.4.1
Additional context/screenshots (更多上下文/截图)
Thread 10 (Thread 0x7fe2009ff700 (LWP 17081)):
#0 0x00007fe28a98d51d in __lll_lock_wait () from /lib64/libpthread.so.0
#1 0x00007fe28a988e51 in _L_lock_1022 () from /lib64/libpthread.so.0
#2 0x00007fe28a988df2 in pthread_mutex_lock () from /lib64/libpthread.so.0
#3 0x0000000000ac982b in pthread_mutex_lock ()
#4 0x000000000050d860 in je_arena_choose_hard ()
#5 0x0000000000544028 in je_tcache_get_hard ()
#6 0x000000000051165b in malloc ()
#7 0x00000000011e97ec in operator new(unsigned long, std::nothrow_t const&) ()
#8 0x0000000000aca071 in bthread::submit_contention(bthread_contention_site_t const&, long) ()
#9 0x0000000000ac9bb7 in pthread_mutex_unlock ()
#10 0x0000000000522750 in je_base_alloc ()
#11 0x0000000000516f4f in je_arena_new ()
#12 0x000000000050d7ab in arena_init_locked ()
#13 0x000000000050d94d in je_arena_choose_hard ()
#14 0x0000000000544028 in je_tcache_get_hard ()
#15 0x000000000051165b in malloc ()
#16 0x00000000011f4cd8 in operator new(unsigned long) ()
#17 0x0000000000693e5e in std::function ()>::function, std::__future_base::_Result_base::_Deleter>, rocksdb::Status>, void>(std::__future_base::_Task_setter, std::__future_base::_Result_base::_Deleter>, rocksdb::Status>) ()