GDB Python API: Getting symbol name from address

Question

In GDB shell I can get symbol name from address like this:

(gdb) info symbol 0x405ece
top::test_thread() in section .text of test_procs

How can I do the same using Python GDB API (https://sourceware.org/gdb/onlinedocs/gdb/Python-API.html)? Is it possible at all?

From outside gdb see [debugging - How to get the symbol name for a memory address in GDB? - Stack Overflow](https://stackoverflow.com/questions/762628/how-to-get-the-symbol-name-for-a-memory-address-in-gdb) ■ Reverse question: [Get address of a global symbol from symbol name with GDB Python API - Stack Overflow](https://stackoverflow.com/questions/54070055/get-address-of-a-global-symbol-from-symbol-name-with-gdb-python-api?rq=1) — user202729, Dec 07 '21 at 01:42

score 2 · Accepted Answer · answered Dec 21 '17 at 23:55

2

Something like this should work (untested):

block = gdb.block_for_pc(0x405ece)
while block and not block.function:
  block = block.superblock

print block.function.print_name

answered Dec 21 '17 at 23:55

Employed Russian

It looks like iteration is not required in my case, since I know in advance that pointer holds valid address of function or method – random Dec 22 '17 at 01:02
Hmm.. also it seems that documentation is not correct. Instead of returning None for invalid address, it throws run-time exception – random Dec 22 '17 at 01:08
This does not work for things like `_start` symbol. (because it doesn't have debugging information? – user202729 Dec 19 '21 at 02:32

1 Answers1