Есть ли способ "просмотреть" содержимое (или размер) std :: vector из gdb?
Предполагая, что вы используете GCC, установите точки наблюдения на theVector->_M_impl._M_startи _M_finish.Если вы используете какую-то другую реализацию std :: vector, настройте ее соответствующим образом.
Пример:
#include <vector>
int main()
{
std::vector<int> v;
v.push_back(1);
v.push_back(2);
}
g++ -g t.cc
gdb -q ./a.out
Reading symbols from /tmp/a.out...done.
(gdb) start
Temporary breakpoint 1 at 0x40090f: file t.cc, line 5.
Temporary breakpoint 1, main () at t.cc:5
5 std::vector<int> v;
(gdb) n
7 v.push_back(1);
(gdb) p v._M_impl._M_start
$1 = (int *) 0x0
(gdb) p v._M_impl._M_finish
$2 = (int *) 0x0
(gdb) p &v._M_impl._M_finish
$3 = (int **) 0x7fffffffd878
(gdb) watch *$3
Hardware watchpoint 2: *$3
(gdb) p &v._M_impl._M_start
$4 = (int **) 0x7fffffffd870
(gdb) watch *$4
Hardware watchpoint 3: *$4
(gdb) c
Hardware watchpoint 3: *$4
Old value = (int *) 0x0
New value = (int *) 0x604010
std::vector<int, std::allocator<int> >::_M_insert_aux (this=0x7fffffffd870, __position=0x0) at /usr/include/c++/4.4/bits/vector.tcc:365
365 this->_M_impl._M_finish = __new_finish;
(gdb) bt
#0 std::vector<int, std::allocator<int> >::_M_insert_aux (this=0x7fffffffd870, __position=0x0) at /usr/include/c++/4.4/bits/vector.tcc:365
#1 0x0000000000400a98 in std::vector<int, std::allocator<int> >::push_back (this=0x7fffffffd870, __x=@0x7fffffffd88c) at /usr/include/c++/4.4/bits/stl_vector.h:741
#2 0x0000000000400935 in main () at t.cc:7
(gdb) c
Hardware watchpoint 2: *$3
Old value = (int *) 0x0
New value = (int *) 0x604014
std::vector<int, std::allocator<int> >::_M_insert_aux (this=0x7fffffffd870, __position=0x0) at /usr/include/c++/4.4/bits/vector.tcc:366
366 this->_M_impl._M_end_of_storage = __new_start + __len;
(gdb) bt
#0 std::vector<int, std::allocator<int> >::_M_insert_aux (this=0x7fffffffd870, __position=0x0) at /usr/include/c++/4.4/bits/vector.tcc:366
#1 0x0000000000400a98 in std::vector<int, std::allocator<int> >::push_back (this=0x7fffffffd870, __x=@0x7fffffffd88c) at /usr/include/c++/4.4/bits/stl_vector.h:741
#2 0x0000000000400935 in main () at t.cc:7
... etc...