Can GDB print the size of structures from a core dump of a C program?

Question

I'm using GDB to analyze a core dump of a C program. Is it possible to print the size of a struct in the program?

score 56 · Answer 1 · answered Apr 13 '11 at 06:09

56

These should all work in GDB (assuming you compiled with -g):

print sizeof(var)
print sizeof(Type)

answered Apr 13 '11 at 06:09

Employed Russian

Just wanted to confirm: This gives the size of the type for the target program and not for gdb, right? The two could be compiled for different architectures. – Daniel Walker Nov 09 '22 at 16:10
1

@DanielWalker Correct: neither `var` nor `Type` may even _exist_ in GDB. – Employed Russian Nov 09 '22 at 17:02

score 0 · Answer 2 · answered Apr 13 '11 at 06:02

0

have u tried "sizeof"?

the complier may do the byte alignment automatically by default,so this size may be greater than you think

answered Apr 13 '11 at 06:02

Stan

2 Answers2