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https://github.com/xemu-project/xemu.git
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5b808275f3
Adds support to compile QEMU with multiple tracing backends at the same time. For example, you can compile QEMU with: $ ./configure --enable-trace-backends=ftrace,dtrace Where 'ftrace' can be handy for having an in-flight record of events, and 'dtrace' can be later used to extract more information from the system. This patch allows having both available without recompiling QEMU. Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
140 lines
4.0 KiB
Python
Executable File
140 lines
4.0 KiB
Python
Executable File
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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Command-line wrapper for the tracetool machinery.
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"""
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__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
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__copyright__ = "Copyright 2012-2014, Lluís Vilanova <vilanova@ac.upc.edu>"
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__license__ = "GPL version 2 or (at your option) any later version"
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__maintainer__ = "Stefan Hajnoczi"
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__email__ = "stefanha@linux.vnet.ibm.com"
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import sys
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import getopt
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from tracetool import error_write, out
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import tracetool.backend
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import tracetool.format
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_SCRIPT = ""
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def error_opt(msg = None):
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if msg is not None:
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error_write("Error: " + msg + "\n")
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backend_descr = "\n".join([ " %-15s %s" % (n, d)
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for n,d in tracetool.backend.get_list() ])
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format_descr = "\n".join([ " %-15s %s" % (n, d)
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for n,d in tracetool.format.get_list() ])
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error_write("""\
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Usage: %(script)s --format=<format> --backends=<backends> [<options>]
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Backends:
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%(backends)s
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Formats:
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%(formats)s
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Options:
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--help This help message.
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--list-backends Print list of available backends.
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--check-backends Check if the given backend is valid.
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--binary <path> Full path to QEMU binary.
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--target-type <type> QEMU emulator target type ('system' or 'user').
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--target-name <name> QEMU emulator target name.
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--probe-prefix <prefix> Prefix for dtrace probe names
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(default: qemu-<target-type>-<target-name>).\
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""" % {
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"script" : _SCRIPT,
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"backends" : backend_descr,
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"formats" : format_descr,
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})
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if msg is None:
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sys.exit(0)
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else:
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sys.exit(1)
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def main(args):
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global _SCRIPT
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_SCRIPT = args[0]
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long_opts = ["backends=", "format=", "help", "list-backends",
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"check-backends"]
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long_opts += ["binary=", "target-type=", "target-name=", "probe-prefix="]
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try:
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opts, args = getopt.getopt(args[1:], "", long_opts)
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except getopt.GetoptError, err:
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error_opt(str(err))
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check_backends = False
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arg_backends = []
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arg_format = ""
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binary = None
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target_type = None
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target_name = None
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probe_prefix = None
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for opt, arg in opts:
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if opt == "--help":
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error_opt()
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elif opt == "--backends":
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arg_backends = arg.split(",")
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elif opt == "--format":
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arg_format = arg
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elif opt == "--list-backends":
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public_backends = tracetool.backend.get_list(only_public = True)
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out(", ".join([ b for b,_ in public_backends ]))
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sys.exit(0)
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elif opt == "--check-backends":
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check_backends = True
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elif opt == "--binary":
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binary = arg
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elif opt == '--target-type':
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target_type = arg
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elif opt == '--target-name':
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target_name = arg
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elif opt == '--probe-prefix':
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probe_prefix = arg
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else:
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error_opt("unhandled option: %s" % opt)
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if len(arg_backends) == 0:
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error_opt("no backends specified")
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if check_backends:
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for backend in arg_backends:
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if not tracetool.backend.exists(backend):
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sys.exit(1)
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sys.exit(0)
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if arg_format == "stap":
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if binary is None:
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error_opt("--binary is required for SystemTAP tapset generator")
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if probe_prefix is None and target_type is None:
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error_opt("--target-type is required for SystemTAP tapset generator")
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if probe_prefix is None and target_name is None:
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error_opt("--target-name is required for SystemTAP tapset generator")
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if probe_prefix is None:
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probe_prefix = ".".join(["qemu", target_type, target_name])
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try:
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tracetool.generate(sys.stdin, arg_format, arg_backends,
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binary=binary, probe_prefix=probe_prefix)
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except tracetool.TracetoolError, e:
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error_opt(str(e))
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if __name__ == "__main__":
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main(sys.argv)
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