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fda14dd782
On Debian 10, pdwtags reliably segfaults when parsing the libvirt remote protocol files. This crash was previously ignored by 'make check' because of the way we piped the pdwtags output to the perl post-processing scripts. When this was converted to use python it mistakenly started being a fatal error. We need to explicitly ignore pdwtags output if it exited with non-zero return code. Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
139 lines
4.4 KiB
Python
139 lines
4.4 KiB
Python
#!/usr/bin/env python3
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#
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# Copyright (C) 2019 Red Hat, Inc.
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#
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# This library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# This library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library. If not, see
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# <http://www.gnu.org/licenses/>.
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#
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# This uses pdwtags to check remote protocol defs
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#
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# * the "split" splits on the /* DD */ comments, so that $p iterates
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# through the struct definitions.
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# * process only "struct remote_..." entries
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# * remove comments and preceding TAB throughout
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# * remove empty lines throughout
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# * remove white space at end of buffer
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import os
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import os.path
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import re
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import subprocess
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import sys
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cc = sys.argv[1]
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objext = sys.argv[2]
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proto_lo = sys.argv[3]
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expected = sys.argv[4]
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proto_lo = proto_lo.replace("/", "/.libs/")
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ccargv = cc.split(" ")
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ccargv.append("-v")
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ccproc = subprocess.Popen(ccargv, stdout=subprocess.PIPE,
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stderr=subprocess.STDOUT)
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out, err = ccproc.communicate()
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out = out.decode("utf-8")
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if out.find("clang") != -1:
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print("WARNING: skipping pdwtags test with Clang", file=sys.stderr)
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sys.exit(0)
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def which(program):
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def is_exe(fpath):
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return (os.path.isfile(fpath) and
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os.access(fpath, os.X_OK))
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fpath, fname = os.path.split(program)
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if fpath:
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if is_exe(program):
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return program
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else:
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for path in os.environ["PATH"].split(os.pathsep):
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exe_file = os.path.join(path, program)
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if is_exe(exe_file):
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return exe_file
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return None
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pdwtags = which("pdwtags")
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if pdwtags is None:
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print("WARNING: you lack pdwtags; skipping the protocol test",
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file=sys.stderr)
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print("WARNING: install the dwarves package to get pdwtags",
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file=sys.stderr)
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sys.exit(0)
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proto_o = proto_lo.replace(".lo", ".o")
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if not os.path.exists(proto_o):
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raise Exception("Missing %s", proto_o)
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pdwtagsproc = subprocess.Popen(["pdwtags", "--verbose", proto_o],
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stdout=subprocess.PIPE, stderr=subprocess.PIPE)
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out, err = pdwtagsproc.communicate()
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out = out.decode("utf-8")
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err = err.decode("utf-8")
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if out == "" or pdwtagsproc.returncode != 0:
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if out == "":
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print("WARNING: no output, pdwtags appears broken:", file=sys.stderr)
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else:
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print("WARNING: exit code %d, pdwtags appears broken:" %
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pdwtagsproc.returncode, file=sys.stderr)
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for l in err.strip().split("\n"):
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print("WARNING: %s" % l, file=sys.stderr)
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print("WARNING: skipping the remote protocol test", file=sys.stderr)
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sys.exit(0)
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# With pdwtags 1.8, --verbose output includes separators like these:
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# /* 93 */
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# /* <0> (null):0 */
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# with the second line omitted for intrinsic types.
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# Whereas with pdwtags 1.3, they look like this:
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# /* <2d2> /usr/include/libio.h:180 */
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# The alternation of the following regexps matches both cases.
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r1 = r'''/\* \d+ \*/'''
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r2 = r'''/\* <[0-9a-fA-F]+> \S+:\d+ \*/'''
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libs_prefix = "remote_|qemu_|lxc_|admin_"
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other_prefix = "keepalive|vir(Net|LockSpace|LXCMonitor)"
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struct_prefix = "(" + libs_prefix + "|" + other_prefix + ")"
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n = 0
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bits = re.split(r'''\n*(?:%s|%s)\n''' % (r1, r2), out)
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actual = ["/* -*- c -*- */"]
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for bit in bits:
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if re.search(r'''^(struct|enum)\s+''' + struct_prefix, bit):
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bit = re.sub(r'''\t*/\*.*?\*/''', "", bit)
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bit = re.sub(r'''\s+\n''', '''\n''', bit)
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bit = re.sub(r'''\s+$''', "", bit)
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bit = re.sub(r'''\t''', " ", bit)
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actual.append(bit)
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n = n + 1
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if n < 1:
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print("WARNING: No structs/enums matched. Your", file=sys.stderr)
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print("WARNING: pdwtags program is probably too old", file=sys.stderr)
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print("WARNING: skipping the remote protocol test", file=sys.stderr)
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print("WARNING: install dwarves-1.3 or newer", file=sys.stderr)
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sys.exit(8)
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diff = subprocess.Popen(["diff", "-u", expected, "-"], stdin=subprocess.PIPE)
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actualstr = "\n".join(actual) + "\n"
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diff.communicate(input=actualstr.encode("utf-8"))
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sys.exit(diff.returncode)
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