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Posted to dev@brpc.apache.org by GitBox <gi...@apache.org> on 2022/11/01 02:43:44 UTC
[GitHub] [incubator-brpc] vinllen opened a new issue, #1979: brpc申请8k导致tcmalloc出core
vinllen opened a new issue, #1979:
URL: https://github.com/apache/incubator-brpc/issues/1979
**Describe the bug (描述bug)**
core栈：
```
(gdb) bt
#0 SLL_Next (t=0xe000000038000000) at infra-cpp-thirdparty/gperftools-27/src/linked_list.h:69
#1 SLL_TryPop (rv=<synthetic pointer>, list=0x31b1dc0) at infra-cpp-thirdparty/gperftools-27/src/linked_list.h:69
#2 TryPop (rv=<synthetic pointer>, this=0x31b1dc0) at infra-cpp-thirdparty/gperftools-27/src/thread_cache.h:220
#3 Allocate (oom_handler=0x152fac0 <tcmalloc::malloc_oom(unsigned long)>, cl=48, size=8192, this=0x31b17c0) at infra-cpp-thirdparty/gperftools-27/src/thread_cache.h:379
#4 malloc_fast_path<tcmalloc::malloc_oom> (size=8192) at infra-cpp-thirdparty/gperftools-27/src/tcmalloc.cc:1855
#5 tc_malloc (size=8192) at infra-cpp-thirdparty/gperftools-27/src/tcmalloc.cc:1880
#6 0x0000000000e9957e in create_block (block_size=8192) at infra-cpp-thirdparty/brpc-096/src/butil/iobuf.cpp:459
#7 create_block (block_size=8192) at infra-cpp-thirdparty/brpc-096/src/butil/iobuf.cpp:297
#8 create_block () at infra-cpp-thirdparty/brpc-096/src/butil/iobuf.cpp:311
#9 butil::iobuf::acquire_tls_block () at infra-cpp-thirdparty/brpc-096/src/butil/iobuf.cpp:459
#10 0x0000000000e9d037 in butil::IOPortal::pappend_from_file_descriptor(int, long, unsigned long) () at infra-cpp-thirdparty/brpc-096/src/butil/iobuf.cpp:1558
#11 0x0000000000d9841d in append_from_file_descriptor (max_count=524288, fd=<optimized out>, this=0x2cd66080) at infra-cpp-thirdparty/brpc-096/src/butil/iobuf_inl.h:42
#12 brpc::Socket::DoRead(unsigned long) () at infra-cpp-thirdparty/brpc-096/src/brpc/socket.cpp:1838
#13 0x0000000000ce63b3 in brpc::InputMessenger::OnNewMessages(brpc::Socket*) () at infra-cpp-thirdparty/brpc-096/src/brpc/input_messenger.cpp:202
#14 0x0000000000d9a9fd in brpc::Socket::ProcessEvent(void*) () at infra-cpp-thirdparty/brpc-096/src/brpc/socket.cpp:1020
#15 0x0000000000e230cf in bthread::TaskGroup::task_runner(long) () at infra-cpp-thirdparty/brpc-096/src/bthread/task_group.cpp:297
#16 0x0000000000e0caa1 in bthread_make_fcontext () at external/ks_build_tools/gcc-8.3.0/bin/../lib/gcc/x86_64-pc-linux-gnu/8.3.0/../../../../include/c++/8.3.0/new:169
Cannot access memory at address 0x7f91bf428000
```
**To Reproduce (复现方法)**
偶现问题
**Expected behavior (期望行为)**
**Versions (各种版本)**
OS: 4.18
Compiler:
brpc:
protobuf:
**Additional context/screenshots (更多上下文/截图)**
https://github.com/gperftools/gperftools/issues/1036 tcmalloc这里有相同反馈的问题，作者认为这是上层管理的bug。
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[GitHub] [incubator-brpc] vinllen commented on issue #1979: brpc申请8k导致tcmalloc出core
Posted by GitBox <gi...@apache.org>.
vinllen commented on issue #1979:
URL: https://github.com/apache/incubator-brpc/issues/1979#issuecomment-1309821474
了解 预期猜测的确是上层的问题，我再看下
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Re: [I] brpc申请8k导致tcmalloc出core (brpc)
Posted by "tangzhiqiang3 (via GitHub)" <gi...@apache.org>.
tangzhiqiang3 commented on issue #1979:
URL: https://github.com/apache/brpc/issues/1979#issuecomment-1720709755
demo program：
`#include <stdio.h>
#include <gperftools/tcmalloc.h>
int main()
{
char *ptr = (char *)tc_malloc(sizeof(char));
if(ptr){
printf("tcmalloc works failed!\n");
}
tc_free(ptr);
printf("tcmalloc works fine.\n");
return 0;
}`
Execution issues after cross compilation:
# ldd test
./test:
libtcmalloc.so.9 => /var/data/demo_test/libtcmalloc.so.9 (0x268c1ce000)
libc++.so.1 => /lib64/libc++.so.1 (0x268c3d1000)
libm.so.3 => /lib64/libm.so.3 (0x268c4c0000)
libc.so.4 => /usr/lib/ldqnx-64.so.2 (0x268c11b000)
# ./test
Process 905670781 (test) terminated SIGSEGV code=1 fltno=11 ip=0000000defa9a868(/var/data/demo_test/libtcmalloc.so.9@calloc+0x0000000000000000) mapaddr=000000000002e868. ref=000000368d29cfc0
Memory fault (core dumped)
debug：
(gdb) set solib-search-path ./lib
(gdb) file test
Reading symbols from test...done.
(gdb) core-file test.core
[New pid 39800955 tid 1]
Program terminated with signal SIGSEGV, Segmentation fault.
#0 tc_calloc (n=n@entry=34, elem_size=elem_size@entry=8) at src/tcmalloc.cc:1984
1984 size_t elem_size) PERFTOOLS_NOTHROW {
(gdb) f 1
#1 0x00000033358c4e04 in __emutls_get_address (obj=0x33358e4040 <__emutls_v._ZN8tcmalloc11ThreadCache17threadlocal_data_E>) at ../../../../libgcc/emutls.c:159
159 ../../../../libgcc/emutls.c: No such file or directory.
(gdb) f 1
#1 0x00000033358c4e04 in __emutls_get_address (obj=0x33358e4040 <__emutls_v._ZN8tcmalloc11ThreadCache17threadlocal_data_E>) at ../../../../libgcc/emutls.c:159
159 in ../../../../libgcc/emutls.c
(gdb) p list
No symbol "list" in current context.
(gdb) p next
$1 = 1
(gdb) p list
No symbol "list" in current context.
(gdb)
why ？
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[GitHub] [incubator-brpc] lorinlee commented on issue #1979: brpc申请8k导致tcmalloc出core
Posted by GitBox <gi...@apache.org>.
lorinlee commented on issue #1979:
URL: https://github.com/apache/incubator-brpc/issues/1979#issuecomment-1308455335
应该是其他地方内存写坏导致破坏了tcmalloc的内部数据结构，挂在这里只是brpc申请内存触发了，这里已经不是第一现场了。可以用ASAN或者valgrind看看是不是哪里内存写坏了
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[GitHub] [incubator-brpc] vinllen closed issue #1979: brpc申请8k导致tcmalloc出core
Posted by GitBox <gi...@apache.org>.
vinllen closed issue #1979: brpc申请8k导致tcmalloc出core
URL: https://github.com/apache/incubator-brpc/issues/1979
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