Question

程序退出时，会显示以下信息：

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

在一个物体上似乎是双重自由。然后我使用gdb来调试coredump文件。以下是bt结果（未发布更多痕迹）：

#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（某些行被屏蔽）：

==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。但我无法知道正确的静态。谁有任何想法知道删除哪个字符串会导致错误以及如何解决？感谢

PS：程序在linux 2.6.9下运行。 gcc版本是4.2.2。使用dll。

新更新： 使用gdb列出错误的lib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。有没有想过修复这个错误？

Answer 1

问题解决了。 libkmm.so.2.0.0的source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，IulianŞerbănoiu和其他人阅读这个问题。

程序退出时__tcf_0处的分段错误

1 个答案: