xref: /openbmc/qemu/tests/guest-debug/run-test.py (revision a6caeee8) 
1#!/usr/bin/env python3
2#
3# Run a gdbstub test case
4#
5# Copyright (c) 2019 Linaro
6#
7# Author: Alex Bennée <alex.bennee@linaro.org>
8#
9# This work is licensed under the terms of the GNU GPL, version 2 or later.
10# See the COPYING file in the top-level directory.
11#
12# SPDX-License-Identifier: GPL-2.0-or-later
13
14import argparse
15import subprocess
16import shutil
17import shlex
18import os
19from time import sleep
20from tempfile import TemporaryDirectory
21
22def get_args():
23    parser = argparse.ArgumentParser(description="A gdbstub test runner")
24    parser.add_argument("--qemu", help="Qemu binary for test",
25                        required=True)
26    parser.add_argument("--qargs", help="Qemu arguments for test")
27    parser.add_argument("--binary", help="Binary to debug",
28                        required=True)
29    parser.add_argument("--test", help="GDB test script",
30                        required=True)
31    parser.add_argument("--gdb", help="The gdb binary to use",
32                        default=None)
33    parser.add_argument("--output", help="A file to redirect output to")
34
35    return parser.parse_args()
36
37
38def log(output, msg):
39    if output:
40        output.write(msg + "\n")
41        output.flush()
42    else:
43        print(msg)
44
45
46if __name__ == '__main__':
47    args = get_args()
48
49    # Search for a gdb we can use
50    if not args.gdb:
51        args.gdb = shutil.which("gdb-multiarch")
52    if not args.gdb:
53        args.gdb = shutil.which("gdb")
54    if not args.gdb:
55        print("We need gdb to run the test")
56        exit(-1)
57    if args.output:
58        output = open(args.output, "w")
59    else:
60        output = None
61
62    socket_dir = TemporaryDirectory("qemu-gdbstub")
63    socket_name = os.path.join(socket_dir.name, "gdbstub.socket")
64
65    # Launch QEMU with binary
66    if "system" in args.qemu:
67        cmd = "%s %s %s -gdb unix:path=%s,server=on" % (args.qemu,
68                                                        args.qargs,
69                                                        args.binary,
70                                                        socket_name)
71    else:
72        cmd = "%s %s -g %s %s" % (args.qemu, args.qargs, socket_name,
73                                  args.binary)
74
75    log(output, "QEMU CMD: %s" % (cmd))
76    inferior = subprocess.Popen(shlex.split(cmd))
77
78    # Now launch gdb with our test and collect the result
79    gdb_cmd = "%s %s" % (args.gdb, args.binary)
80    # run quietly and ignore .gdbinit
81    gdb_cmd += " -q -n -batch"
82    # disable prompts in case of crash
83    gdb_cmd += " -ex 'set confirm off'"
84    # connect to remote
85    gdb_cmd += " -ex 'target remote %s'" % (socket_name)
86    # finally the test script itself
87    gdb_cmd += " -x %s" % (args.test)
88
89
90    sleep(1)
91    log(output, "GDB CMD: %s" % (gdb_cmd))
92
93    result = subprocess.call(gdb_cmd, shell=True, stdout=output)
94
95    # A result of greater than 128 indicates a fatal signal (likely a
96    # crash due to gdb internal failure). That's a problem for GDB and
97    # not the test so we force a return of 0 so we don't fail the test on
98    # account of broken external tools.
99    if result > 128:
100        log(output, "GDB crashed? (%d, %d) SKIPPING" % (result, result - 128))
101        exit(0)
102
103    try:
104        inferior.wait(2)
105    except subprocess.TimeoutExpired:
106        log(output, "GDB never connected? Killed guest")
107        inferior.kill()
108
109    exit(result)
110