Is there any g++ option to dump class layout and vtables?

Question

I want to see how g++ lays out memory for classes and virtual tables.

Is there a way to dump this information, using g++'s options?

http://stackoverflow.com/questions/2123823/dump-class-struct-member-variables-in-g ? — Dan, Mar 31 '10 at 02:31
vtable only: http://stackoverflow.com/questions/6191678/print-c-vtables-using-gdb — Ciro Santilli OurBigBook.com, May 05 '16 at 13:57

score 27 · Accepted Answer · edited Oct 20 '14 at 16:23

27

g++ -fdump-class-hierarchy -c source_file.cpp

edited Oct 20 '14 at 16:23

ecatmur

answered Mar 31 '10 at 02:26

Artem Sokolov

4

Note that in g++ 8 this flag was switched to _-fdump-lang-class_. This also works for g++ 9. See https://gcc.gnu.org/onlinedocs/gcc-9.1.0/gcc/Developer-Options.html – daniglezad Apr 25 '21 at 10:05

1 Answers1