Print elements of C string vector nicely in GDB-CodePudding

I want to view the content of std::vector<std::string> in GDB nicely

I can view it with just like in this suggestion

print *(myVector._M_impl._M_start)@myVector.size()

But it prints out all stuff that is part of the C STL and it is a bit difficult to view the "actual" content of the strings

Is there any way to view the elements nicely without displaying some part of the STL containers?

CodePudding user response：

Is there any way to view the elements nicely without displaying some part of the STL containers?

You either have a very old GDB, or some non-standard setup.

Here is what it looks like on a Fedora-34 system with default GDB installation:

(gdb) list
1       #include <string>
2       #include <vector>
3
4       int main()
5       {
6         std::vector<std::string> v;
7         v.push_back("abc");
8         v.push_back("abcdef");
9         v.push_back("ghi");
10      }
(gdb) b 9
Breakpoint 1 at 0x401378: file t.cc, line 9.
(gdb) run
Starting program: /tmp/a.out
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".

Breakpoint 1, main () at t.cc:9
9         v.push_back("ghi");
(gdb) p v
$1 = std::vector of length 2, capacity 2 = {"abc", "abcdef"}
(gdb) n
10      }
(gdb) p v
$2 = std::vector of length 3, capacity 4 = {"abc", "abcdef", "ghi"}
(gdb) q