summaryrefslogtreecommitdiff
path: root/scripts/tracetool.py
blob: ab7653a5ce0db12fca654d56bc1adefde3facb0d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
#!/usr/bin/env python3
# -*- coding: utf-8 -*-

"""
Command-line wrapper for the tracetool machinery.
"""

__author__     = "Lluís Vilanova <vilanova@ac.upc.edu>"
__copyright__  = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
__license__    = "GPL version 2 or (at your option) any later version"

__maintainer__ = "Stefan Hajnoczi"
__email__      = "stefanha@redhat.com"


import sys
import getopt

from tracetool import error_write, out, out_open
import tracetool.backend
import tracetool.format


_SCRIPT = ""

def error_opt(msg = None):
    if msg is not None:
        error_write("Error: " + msg + "\n")

    backend_descr = "\n".join([ "    %-15s %s" % (n, d)
                                for n,d in tracetool.backend.get_list() ])
    format_descr = "\n".join([ "    %-15s %s" % (n, d)
                               for n,d in tracetool.format.get_list() ])
    error_write("""\
Usage: %(script)s --format=<format> --backends=<backends> [<options>] <trace-events> ... <output>

Backends:
%(backends)s

Formats:
%(formats)s

Options:
    --help                   This help message.
    --list-backends          Print list of available backends.
    --check-backends         Check if the given backend is valid.
    --binary <path>          Full path to QEMU binary.
    --target-type <type>     QEMU emulator target type ('system' or 'user').
    --target-name <name>     QEMU emulator target name.
    --group <name>           Name of the event group
    --probe-prefix <prefix>  Prefix for dtrace probe names
                             (default: qemu-<target-type>-<target-name>).\
""" % {
            "script" : _SCRIPT,
            "backends" : backend_descr,
            "formats" : format_descr,
            })

    if msg is None:
        sys.exit(0)
    else:
        sys.exit(1)

def main(args):
    global _SCRIPT
    _SCRIPT = args[0]

    long_opts = ["backends=", "format=", "help", "list-backends",
                 "check-backends", "group="]
    long_opts += ["binary=", "target-type=", "target-name=", "probe-prefix="]

    try:
        opts, args = getopt.getopt(args[1:], "", long_opts)
    except getopt.GetoptError as err:
        error_opt(str(err))

    check_backends = False
    arg_backends = []
    arg_format = ""
    arg_group = None
    binary = None
    target_type = None
    target_name = None
    probe_prefix = None
    for opt, arg in opts:
        if opt == "--help":
            error_opt()

        elif opt == "--backends":
            arg_backends = arg.split(",")
        elif opt == "--group":
            arg_group = arg
        elif opt == "--format":
            arg_format = arg

        elif opt == "--list-backends":
            public_backends = tracetool.backend.get_list(only_public = True)
            out(", ".join([ b for b,_ in public_backends ]))
            sys.exit(0)
        elif opt == "--check-backends":
            check_backends = True

        elif opt == "--binary":
            binary = arg
        elif opt == '--target-type':
            target_type = arg
        elif opt == '--target-name':
            target_name = arg
        elif opt == '--probe-prefix':
            probe_prefix = arg

        else:
            error_opt("unhandled option: %s" % opt)

    if len(arg_backends) == 0:
        error_opt("no backends specified")

    if check_backends:
        for backend in arg_backends:
            if not tracetool.backend.exists(backend):
                sys.exit(1)
        sys.exit(0)

    if arg_group is None:
        error_opt("group name is required")

    if arg_format == "stap":
        if binary is None:
            error_opt("--binary is required for SystemTAP tapset generator")
        if probe_prefix is None and target_type is None:
            error_opt("--target-type is required for SystemTAP tapset generator")
        if probe_prefix is None and target_name is None:
            error_opt("--target-name is required for SystemTAP tapset generator")

        if probe_prefix is None:
            probe_prefix = ".".join(["qemu", target_type, target_name])

    if len(args) < 2:
        error_opt("missing trace-events and output filepaths")
    events = []
    for arg in args[:-1]:
        with open(arg, "r") as fh:
            events.extend(tracetool.read_events(fh, arg))

    out_open(args[-1])

    try:
        tracetool.generate(events, arg_group, arg_format, arg_backends,
                           binary=binary, probe_prefix=probe_prefix)
    except tracetool.TracetoolError as e:
        error_opt(str(e))

if __name__ == "__main__":
    main(sys.argv)