xref: /openbmc/qemu/scripts/tracetool.py (revision a9ded601) 
1#!/usr/bin/env python
2# -*- coding: utf-8 -*-
3
4"""
5Command-line wrapper for the tracetool machinery.
6"""
7
8__author__     = "Lluís Vilanova <vilanova@ac.upc.edu>"
9__copyright__  = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
10__license__    = "GPL version 2 or (at your option) any later version"
11
12__maintainer__ = "Stefan Hajnoczi"
13__email__      = "stefanha@linux.vnet.ibm.com"
14
15
16import sys
17import getopt
18import os.path
19import re
20
21from tracetool import error_write, out
22import tracetool.backend
23import tracetool.format
24
25
26_SCRIPT = ""
27
28def error_opt(msg = None):
29    if msg is not None:
30        error_write("Error: " + msg + "\n")
31
32    backend_descr = "\n".join([ "    %-15s %s" % (n, d)
33                                for n,d in tracetool.backend.get_list() ])
34    format_descr = "\n".join([ "    %-15s %s" % (n, d)
35                               for n,d in tracetool.format.get_list() ])
36    error_write("""\
37Usage: %(script)s --format=<format> --backends=<backends> [<options>]
38
39Backends:
40%(backends)s
41
42Formats:
43%(formats)s
44
45Options:
46    --help                   This help message.
47    --list-backends          Print list of available backends.
48    --check-backends         Check if the given backend is valid.
49    --binary <path>          Full path to QEMU binary.
50    --target-type <type>     QEMU emulator target type ('system' or 'user').
51    --target-name <name>     QEMU emulator target name.
52    --group <name>           Name of the event group
53    --probe-prefix <prefix>  Prefix for dtrace probe names
54                             (default: qemu-<target-type>-<target-name>).\
55""" % {
56            "script" : _SCRIPT,
57            "backends" : backend_descr,
58            "formats" : format_descr,
59            })
60
61    if msg is None:
62        sys.exit(0)
63    else:
64        sys.exit(1)
65
66def main(args):
67    global _SCRIPT
68    _SCRIPT = args[0]
69
70    long_opts = ["backends=", "format=", "help", "list-backends",
71                 "check-backends", "group="]
72    long_opts += ["binary=", "target-type=", "target-name=", "probe-prefix="]
73
74    try:
75        opts, args = getopt.getopt(args[1:], "", long_opts)
76    except getopt.GetoptError as err:
77        error_opt(str(err))
78
79    check_backends = False
80    arg_backends = []
81    arg_format = ""
82    arg_group = None
83    binary = None
84    target_type = None
85    target_name = None
86    probe_prefix = None
87    for opt, arg in opts:
88        if opt == "--help":
89            error_opt()
90
91        elif opt == "--backends":
92            arg_backends = arg.split(",")
93        elif opt == "--group":
94            arg_group = arg
95        elif opt == "--format":
96            arg_format = arg
97
98        elif opt == "--list-backends":
99            public_backends = tracetool.backend.get_list(only_public = True)
100            out(", ".join([ b for b,_ in public_backends ]))
101            sys.exit(0)
102        elif opt == "--check-backends":
103            check_backends = True
104
105        elif opt == "--binary":
106            binary = arg
107        elif opt == '--target-type':
108            target_type = arg
109        elif opt == '--target-name':
110            target_name = arg
111        elif opt == '--probe-prefix':
112            probe_prefix = arg
113
114        else:
115            error_opt("unhandled option: %s" % opt)
116
117    if len(arg_backends) == 0:
118        error_opt("no backends specified")
119
120    if check_backends:
121        for backend in arg_backends:
122            if not tracetool.backend.exists(backend):
123                sys.exit(1)
124        sys.exit(0)
125
126    if arg_group is None:
127        error_opt("group name is required")
128
129    if arg_format == "stap":
130        if binary is None:
131            error_opt("--binary is required for SystemTAP tapset generator")
132        if probe_prefix is None and target_type is None:
133            error_opt("--target-type is required for SystemTAP tapset generator")
134        if probe_prefix is None and target_name is None:
135            error_opt("--target-name is required for SystemTAP tapset generator")
136
137        if probe_prefix is None:
138            probe_prefix = ".".join(["qemu", target_type, target_name])
139
140    if len(args) < 1:
141        error_opt("missing trace-events filepath")
142    events = []
143    for arg in args:
144        with open(arg, "r") as fh:
145            events.extend(tracetool.read_events(fh))
146
147    try:
148        tracetool.generate(events, arg_group, arg_format, arg_backends,
149                           binary=binary, probe_prefix=probe_prefix)
150    except tracetool.TracetoolError as e:
151        error_opt(str(e))
152
153if __name__ == "__main__":
154    main(sys.argv)
155