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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
#
# Written by Christian Holler <decoder at mozilla dot com>
import json
import os
import sys
import subprocess
if len(sys.argv) != 2:
print("Usage: %s binfile" % os.path.basename(sys.argv[0]))
sys.exit(1)
binfile = sys.argv[1]
addr2len = {}
addrs = []
output = subprocess.check_output(["objdump", "-t", binfile]).decode("utf-8")
for line in output.splitlines():
line = line.replace("\t", " ")
components = [x for x in line.split(" ") if x]
if not components:
continue
try:
start_addr = int(components[0], 16)
except ValueError:
continue
# Length has variable position in objdump output
length = None
for comp in components[1:]:
if len(comp) == 16:
try:
length = int(comp, 16)
break
except:
continue
if length is None:
print("ERROR: Couldn't determine function section length: %s" % line)
func = components[-1]
addrs.append(start_addr)
addr2len[str(hex(start_addr))] = str(length)
# The search implementation in the AFL runtime expects everything sorted.
addrs.sort()
addrs = [str(hex(addr)) for addr in addrs]
# We symbolize in one go to speed things up with large binaries.
output = subprocess.check_output([
"llvm-addr2line",
"--output-style=JSON",
"-f", "-C", "-a", "-e",
binfile],
input="\n".join(addrs).encode("utf-8")).decode("utf-8")
output = output.strip().splitlines()
for line in output:
output = json.loads(line)
if "Symbol" in output and output["Address"] in addr2len:
final_output = [
output["Address"],
addr2len[output["Address"]],
os.path.basename(output["ModuleName"]),
output["Symbol"][0]["FileName"],
output["Symbol"][0]["FunctionName"]
]
print("\t".join(final_output))
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