CODEWITHSUNDEEP
cdebugginggdb
Gerhard
Gerhard

Reputation: 2035

How to locate where a type and variable is first declared with gdb

When debugging C code with gdb, I often have to find where things are first declared, whether a type (structure) or a variable. According to this answer ( GDB: break if variable equal value ) it might not be possible in gdb. Is this true?

If it's not possible in gdb, are there other strategies? I have often used grep, but this fails if there are too many results.

Upvotes: 2

Views: 1928

Answers (1)

user184968
user184968

Reputation:

I often have to find where things are first declared, whether a type (structure) or a variable.

Declared or defined (What is the difference between a definition and a declaration?)? If defined then these commands are available:

Examining the Symbol Table (https://sourceware.org/gdb/onlinedocs/gdb/Symbols.html#Symbols) (if compiled with -g):

info types regexp lists all source files where a type is defined.

info variables regexp - prints the names and data types of all variables (except for local variables) whose names contain a match for regular expression regexp.

Upvotes: 3

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