Why segmentation fault happened when i define a const string in a google test programe?

Question

I want to run unit test with google test, but got Segmentation fault. I have just define a global const string, and RUN_ALL_TESTS, why?

the gdb result is :

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[==========] Running 0 tests from 0 test cases.
[==========] 0 tests from 0 test cases ran. (1 ms total)
[  PASSED  ] 0 tests.

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff6fe415c in __GI___libc_free (mem=0x603588) at malloc.c:2947
2947    malloc.c: No such file or directory.

And flowing is the backtrace:

(gdb) bt
#0  0x00007ffff6fe415c in __GI___libc_free (mem=0x603588) at malloc.c:2947
#1  0x00007ffff75fa36f in std::basic_string<char, std::char_traits<char>, std::allocator<char> >::~basic_string() () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#2  0x00007ffff7bb25ba in void std::_Destroy<std::string>(std::string*) () from /home/caros/src/secsdk/datasecurity-upgrade/external/libgtest.so
#3  0x00007ffff7bb04bd in void std::_Destroy_aux<false>::__destroy<std::string*>(std::string*, std::string*) () from /home/caros/src/secsdk/datasecurity-upgrade/external/libgtest.so
#4  0x00007ffff7bac65c in void std::_Destroy<std::string*>(std::string*, std::string*) () from /home/caros/src/secsdk/datasecurity-upgrade/external/libgtest.so
#5  0x00007ffff7ba68f3 in void std::_Destroy<std::string*, std::string>(std::string*, std::string*, std::allocator<std::string>&) () from /home/caros/src/secsdk/datasecurity-upgrade/external/libgtest.so
#6  0x00007ffff7ba08b2 in std::vector<std::string, std::allocator<std::string> >::~vector() () from /home/caros/src/secsdk/datasecurity-upgrade/external/libgtest.so
#7  0x00007ffff6f9d53a in __cxa_finalize (d=0x7ffff7b2b440) at cxa_finalize.c:56
#8  0x00007ffff78b7ea3 in __do_global_dtors_aux () from /home/caros/src/secsdk/datasecurity-upgrade/external/libgmock.so
#9  0x00007fffffffd5e0 in ?? ()
#10 0x00007ffff7dea7da in _dl_fini () at dl-fini.c:252
Backtrace stopped: frame did not save the PC

This is my whole source code:

#include <iostream>                                                             
#include "gtest/gtest.h"
#include "gmock/gmock.h"
const std::string fsdfsdf = "sdfsdfsd";
int main(int argc, char* argv[]) {
    testing::InitGoogleMock(&argc, argv);
    RUN_ALL_TESTS();
    return 0;
}

I expect the programe finished without segmentation fault.

Answer 1

why?

There doesn't appear to be anything wrong with your code. The problem is likely in the environment.

You didn't say where libgtest.so and libgmock.so came from. Perhaps they are incompatible with your version of g++. Hard to tell.

Running your program under Valgrind may provide additional clues.