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

I'm using GDB to ana开发者_StackOverflow社区lyze a core dump of a C program. Is it possible to print the size of a struct in the program?

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

print sizeof(var)
print sizeof(Type)

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have u tried "sizeof"?

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