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Pretty Printer is a GDB feature to print the contents of structures in
a pleasant way.
Printing the value of a std::string may look like:
{static npos = 18446744073709551615, _M_dataplus = {<std::allocator<char>> = {<__gnu_cxx::new_allocator<char>> = {<No data fields>}, <No data fields>}, _M_p = 0x7fffffffd330 "Hello, World!"}, _M_string_length = 13, {_M_local_buf = "Hello, World!\\000\\000", _M_allocated_capacity = 6278066737626506568}}
Printing the value with Pretty Pretty:
"Hello, World!"
Enable Pretty Printers via the ~/.gdbinit file.
% cat ~/.gdbinit
python
import sys
sys.path.insert(0, '/usr/share/gcc-9/python')
from libstdcxx.v6.printers import register_libstdcxx_printers
register_libstdcxx_printers (None)
end
%
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