scsi: esp: check buffer length before reading scsi command
[qemu.git] / scripts / tracetool.py
1 #!/usr/bin/env python
2 # -*- coding: utf-8 -*-
3
4 """
5 Command-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
16 import sys
17 import getopt
18
19 from tracetool import error_write, out
20 import tracetool.backend
21 import tracetool.format
22
23
24 _SCRIPT = ""
25
26 def error_opt(msg = None):
27 if msg is not None:
28 error_write("Error: " + msg + "\n")
29
30 backend_descr = "\n".join([ " %-15s %s" % (n, d)
31 for n,d in tracetool.backend.get_list() ])
32 format_descr = "\n".join([ " %-15s %s" % (n, d)
33 for n,d in tracetool.format.get_list() ])
34 error_write("""\
35 Usage: %(script)s --format=<format> --backends=<backends> [<options>]
36
37 Backends:
38 %(backends)s
39
40 Formats:
41 %(formats)s
42
43 Options:
44 --help This help message.
45 --list-backends Print list of available backends.
46 --check-backends Check if the given backend is valid.
47 --binary <path> Full path to QEMU binary.
48 --target-type <type> QEMU emulator target type ('system' or 'user').
49 --target-name <name> QEMU emulator target name.
50 --probe-prefix <prefix> Prefix for dtrace probe names
51 (default: qemu-<target-type>-<target-name>).\
52 """ % {
53 "script" : _SCRIPT,
54 "backends" : backend_descr,
55 "formats" : format_descr,
56 })
57
58 if msg is None:
59 sys.exit(0)
60 else:
61 sys.exit(1)
62
63
64 def main(args):
65 global _SCRIPT
66 _SCRIPT = args[0]
67
68 long_opts = ["backends=", "format=", "help", "list-backends",
69 "check-backends"]
70 long_opts += ["binary=", "target-type=", "target-name=", "probe-prefix="]
71
72 try:
73 opts, args = getopt.getopt(args[1:], "", long_opts)
74 except getopt.GetoptError as err:
75 error_opt(str(err))
76
77 check_backends = False
78 arg_backends = []
79 arg_format = ""
80 binary = None
81 target_type = None
82 target_name = None
83 probe_prefix = None
84 for opt, arg in opts:
85 if opt == "--help":
86 error_opt()
87
88 elif opt == "--backends":
89 arg_backends = arg.split(",")
90 elif opt == "--format":
91 arg_format = arg
92
93 elif opt == "--list-backends":
94 public_backends = tracetool.backend.get_list(only_public = True)
95 out(", ".join([ b for b,_ in public_backends ]))
96 sys.exit(0)
97 elif opt == "--check-backends":
98 check_backends = True
99
100 elif opt == "--binary":
101 binary = arg
102 elif opt == '--target-type':
103 target_type = arg
104 elif opt == '--target-name':
105 target_name = arg
106 elif opt == '--probe-prefix':
107 probe_prefix = arg
108
109 else:
110 error_opt("unhandled option: %s" % opt)
111
112 if len(arg_backends) == 0:
113 error_opt("no backends specified")
114
115 if check_backends:
116 for backend in arg_backends:
117 if not tracetool.backend.exists(backend):
118 sys.exit(1)
119 sys.exit(0)
120
121 if arg_format == "stap":
122 if binary is None:
123 error_opt("--binary is required for SystemTAP tapset generator")
124 if probe_prefix is None and target_type is None:
125 error_opt("--target-type is required for SystemTAP tapset generator")
126 if probe_prefix is None and target_name is None:
127 error_opt("--target-name is required for SystemTAP tapset generator")
128
129 if probe_prefix is None:
130 probe_prefix = ".".join(["qemu", target_type, target_name])
131
132 try:
133 tracetool.generate(sys.stdin, arg_format, arg_backends,
134 binary=binary, probe_prefix=probe_prefix)
135 except tracetool.TracetoolError as e:
136 error_opt(str(e))
137
138 if __name__ == "__main__":
139 main(sys.argv)