check-static-inits.py

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#!/usr/bin/env python3

import glob

import os

import re

import shutil

import subprocess

import sys

srcdir = sys.argv[1]

base_srcdir = sys.argv[2]

builddir = sys.argv[3]

objdump = os.getenv("OBJDUMP", shutil.which("objdump"))

if not objdump:

    print("check-static-inits.py: 'ldd' not found; skipping test")

    sys.exit(77)

if sys.version_info < (3, 5):

    print("check-static-inits.py: needs python 3.5 for recursive support in glob")

    sys.exit(77)

OBJS = glob.glob(os.path.join(builddir, "**", "*hb*.o"), recursive=True)

if not OBJS:

    print("check-static-inits.py: object files not found; skipping test")

    sys.exit(77)

stat = 0

tested = False

print("Checking that the following object files has no static initializers/finalizers")

print("\n".join(OBJS))

result = subprocess.run(

    objdump.split() + ["-t"] + OBJS, stdout=subprocess.PIPE, stderr=subprocess.PIPE

if result.returncode:

    if result.stderr.find(b"not recognized") != -1:

        # https://github.com/harfbuzz/harfbuzz/issues/3019

        print('objdump returned "not recognized", skipping')

    else:

        print("objdump returned error:\n%s" % (result.stderr.decode("utf-8")))

        stat = 2

else:

    tested = True

result = result.stdout.decode("utf-8")

# Checking that no object file has static initializers

for lib in re.findall(r"^.*\.[cd]tors.*$", result, re.MULTILINE):

    if not re.match(r".*\b0+\b", lib):

        print("Ouch, library has static initializers/finalizers")

        stat = 1

# Checking that no object file has lazy static C++ constructors/destructors or other such stuff

if ("__cxa_" in result) and ("__ubsan_handle" not in result):

    print(

        "Ouch, library has lazy static C++ constructors/destructors or other such stuff"

    stat = 1

sys.exit(stat if tested else 77)