程序退出时，在__tcf_0处出现分段错误

segmentation fault at __tcf_0 when program exits

本文关键字：分段 错误 0处 tcf 程序 退出      更新时间：2023-10-16

程序退出时，给出如下信息:

*** glibc detected *** double free or corruption (!prev): 0x09a8fcb8 ***

似乎在一个对象上是双重自由的。然后使用gdb调试coredump文件。以下是bt结果(不发布更多跟踪):

#0 0x005197a2 in _dl_sysinfo_int80 () from /lib/ld-linux.so.2
#1 0x0055a825 in raise () from /lib/tls/libc.so.6
#2 0x0055c289 in abort () from /lib/tls/libc.so.6
#3 0x0058ecda in __libc_message () from /lib/tls/libc.so.6
#4 0x0059556f in _int_free () from /lib/tls/libc.so.6
#5 0x0059594a in free () from /lib/tls/libc.so.6
#6 0x00c0f001 in operator delete (ptr=0x0) at ../../../../gcc-4.2.2/libstdc++-v3/libsupc++/del_op.cc:49
#7 0x00bea48d in std::string::_Rep::_M_destroy (this=0x9a8fcb8, __a=@0xbfe134af)
  at /home/robert_bu/src/build_gcc-4.2.2/i686-pc-linux-gnu/libstdc++-v3/include/ext/new_allocator.h:97
#8 0x070807e8 in __tcf_0 () from ./../bin/../lib/librlxvm_kmmpv_ocp_tl2.so
#9 0x0055d5a7 in exit () from /lib/tls/libc.so.6
...

然后valgrind结果显示字符串被两个不同的。so文件(libkmm.so.2.0.0和libpv.so.2.0.0)删除。详细信息(部分行被屏蔽):

==28125== Invalid free() / delete / delete[]
==28125==    at 0x400588F: operator delete(void*) (vg_replace_malloc.c:387)
==28125==    by 0x446548C: std::string::_Rep::_M_destroy(std::allocator<char> const&) (new_allocator.h:97)
==28125==    by 0x55FA7E7: __tcf_0 (in /home/alan_tao/vm/test/lib/libkmm.so.2.0.0)
==28125==    by 0x55D5A6: exit (in /lib/tls/libc-2.3.4.so)
==28125==    by 0x42B10D9: stop_sim() (in /home/alan_tao/vm/test/lib/libcomm.so.2.0.0)
==28125==    by 0x807C83A: func_on_exit(int) (in /home/alan_tao/vm/test/bin/engine)
==28125==    by 0x55A917: ??? (in /lib/tls/libc-2.3.4.so)
...
==28125==  Address 0x4a484d0 is 0 bytes inside a block of size 525 free'd
==28125==    at 0x400588F: operator delete(void*) (vg_replace_malloc.c:387)
==28125==    by 0x446548C: std::string::_Rep::_M_destroy(std::allocator<char> const&) new_allocator.h:97)
==28125==    by 0x650C0B7: __tcf_0 (in /home/alan_tao/vm/test/lib/libpv.so.2.0.0)
==28125==    by 0x55D5A6: exit (in /lib/tls/libc-2.3.4.so)
==28125==    by 0x42B10D9: stop_sim() (in /home/alan_tao/vm/test/lib/libcomm.so.2.0.0)
==28125==    by 0x807C83A: func_on_exit(int) (in /home/alan_tao/vm/test/bin/engine)
==28125==    by 0x55A917: ??? (in /lib/tls/libc-2.3.4.so)

…

valgrind结果显示一个字符串被删除两次。但我不知道哪个是正确的静态。谁有任何想法知道删除哪个字符串导致错误以及如何修复它?由于

PS:程序在linux 2.6.9下运行。GCC版本为4.2.2。

新更新:

使用gdb列出错误库文件，命令"l __tcf_0"显示以下代码:

inline std::vector<const char*>& get_phase_name_vec(){
  static std::vector<const char*> phase_name_vec(END_RESP+1, (const char*)NULL);
  return phase_name_vec;
}

这是来自OSCI TLM头文件。上面的库必须包含它们。它位于一个独立的命名空间"tlm"中。有什么办法解决这个错误吗?

问题解决了。libkmm.so.2.0.0的源文件和tlm头文件中存在全局变量名冲突。

似乎"l __tcf_0"没有显示正确的变量。感谢Alex, maverik, Iulian Şerbănoiu和其他阅读这个问题的人。

相关文章：