How to get the number of instructions in a replay file in Python Panda?

[tylzh97]

I found in Python Pandas that the function panda.rr_get_guest_instr_count() can get the number of instructions currently executed, and I also found in rr_log.h that the total number of instructions in the current replay file can be obtained through rr_nondet_log->last_prog_point.guest_instr_count. So how can I get this value in Python?

[lacraig2]

That's not currently something that's exposed to python.

There's a few ways to get at that value. The easiest of which would likely be adding a PANDA API function in the same way that panda.rr_guest_get_instr_count has:

You would need to add a function near here:

panda/panda/src/panda_api.c

Lines 132 to 134 in 35339e8

	uint64_t rr_get_guest_instr_count_external(void){
	return rr_get_guest_instr_count();
	}

add the definition to the header file and also add a method in panda.py:

panda/panda/python/core/pandare/panda.py

Lines 1342 to 1344 in 35339e8

	'''
	return self.libpanda.rr_get_guest_instr_count_external()