Print the whole linked list in gdb?

Question

I have a linked list

struct node {
    data_t data;
    node_t *next;
};

typedef struct {
    node_t *head;
    node_t *foot;
    node_t *curr;   // for iterator
    unsigned int size;
} list_t;

with this structure, let say I defined a list

list_t* myList;

How can I use GDB to print the whole linked list?

You could write a function to print the list and call it http://stackoverflow.com/questions/1354731/gdb-evaluation-of-a-function — Pramod, May 10 '13 at 17:39

score 23 · Accepted Answer · answered May 11 '13 at 04:52

23

This should work (but untested):

define plist
  set var $n = $arg0->head
  while $n
    printf "%d ", $n->data
    set var $n = $n->next
  end
end

(gdb) plist myList

You could put plist into ~/.gdbinit

answered May 11 '13 at 04:52

Employed Russian

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@TimothyLeung Cut/paste the code at the `(gdb)` prompt, or use an editor to put into `~/.gdbinit`. – Employed Russian May 11 '13 at 14:39

score 3 · Answer 2 · answered May 10 '13 at 11:57

3

GDB is scriptable in Python. You can define your own pretty-printers and do other useful things.

Better yet, use a standard container, GDB now supports printing those natively.

answered May 10 '13 at 11:57

n. m. could be an AI

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Print the whole linked list in gdb?

2 Answers2

Linked