I’m trying to see how many code blocks are not necessary for common software under common usage scenarios. Is there a static binary analysis tool that can calculate the total basic block number of a Linux ELF that?
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Answer
Okay, I wrote a script using Angr to obtain all the basic blocks:
JavaScript
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#!/usr/bin/env python3
# A script to dump function and basic block locations, size, etc.
# Install angr (https://docs.angr.io/introductory-errata/install) before use it.
# @author: xiaogw (https://stackoverflow.com/users/1267984/xiaogw)
import angr
import sys
def dump_functions_bbs(p, cfg):
for key in cfg.kb.functions:
for bb in cfg.kb.functions[key].blocks:
print("%s: %s" % (hex(bb.addr), hex(bb.size)))
def main(argv):
if (len(argv) < 2):
print("Usage %s <BIN>" % argv[0])
return 1
path_to_binary = argv[1]
p = angr.Project(path_to_binary, load_options={'auto_load_libs': False})
cfg = p.analyses.CFGFast()
dump_functions_bbs(p, cfg)
return 0
if __name__ == '__main__':
main(sys.argv)