motorhead/qemu
1
0
Fork 0
mirror of https://github.com/Motorhead1991/qemu.git synced 2025-07-26 20:03:54 -06:00
Code Issues Projects Releases Packages Wiki Activity Actions

trace: Multi-backend tracing

Browse source 
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>
This commit is contained in:
Lluís Vilanova 2014-05-27 15:02:14 +02:00 • committed by Stefan Hajnoczi
parent 82432638eb
commit 5b808275f3
20 changed files with 152 additions and 233 deletions
Download patch file Download diff file Expand all files Collapse all files

43
scripts/tracetool.py
View file

@ -6,7 +6,7 @@ Command-line wrapper for the tracetool machinery.
"""
__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
__copyright__ = "Copyright 2012, 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"
@ -32,7 +32,7 @@ def error_opt(msg = None):
format_descr = "\n".join([ " %-15s %s" % (n, d)
for n,d in tracetool.format.get_list() ])
error_write("""\
Usage: %(script)s --format=<format> --backend=<backend> [<options>]
Usage: %(script)s --format=<format> --backends=<backends> [<options>]
Backends:
%(backends)s
@ -43,7 +43,7 @@ Formats:
Options:
--help This help message.
--list-backends Print list of available backends.
--check-backend Check if the given backend is valid.
--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.
@ -65,16 +65,17 @@ def main(args):
global _SCRIPT
_SCRIPT = args[0]
long_opts = [ "backend=", "format=", "help", "list-backends", "check-backend" ]
long_opts += [ "binary=", "target-type=", "target-name=", "probe-prefix=" ]
long_opts = ["backends=", "format=", "help", "list-backends",
"check-backends"]
long_opts += ["binary=", "target-type=", "target-name=", "probe-prefix="]
try:
opts, args = getopt.getopt(args[1:], "", long_opts)
except getopt.GetoptError, err:
error_opt(str(err))
check_backend = False
arg_backend = ""
check_backends = False
arg_backends = []
arg_format = ""
binary = None
target_type = None
@ -84,8 +85,8 @@ def main(args):
if opt == "--help":
error_opt()
elif opt == "--backend":
arg_backend = arg
elif opt == "--backends":
arg_backends = arg.split(",")
elif opt == "--format":
arg_format = arg
@ -93,8 +94,8 @@ def main(args):
public_backends = tracetool.backend.get_list(only_public = True)
out(", ".join([ b for b,_ in public_backends ]))
sys.exit(0)
elif opt == "--check-backend":
check_backend = True
elif opt == "--check-backends":
check_backends = True
elif opt == "--binary":
binary = arg
@ -108,14 +109,14 @@ def main(args):
else:
error_opt("unhandled option: %s" % opt)
if arg_backend is None:
error_opt("backend not set")
if len(arg_backends) == 0:
error_opt("no backends specified")
if check_backend:
if tracetool.backend.exists(arg_backend):
sys.exit(0)
else:
sys.exit(1)
if check_backends:
for backend in arg_backends:
if not tracetool.backend.exists(backend):
sys.exit(1)
sys.exit(0)
if arg_format == "stap":
if binary is None:
@ -126,11 +127,11 @@ def main(args):
error_opt("--target-name is required for SystemTAP tapset generator")
if probe_prefix is None:
probe_prefix = ".".join([ "qemu", target_type, target_name ])
probe_prefix = ".".join(["qemu", target_type, target_name])
try:
tracetool.generate(sys.stdin, arg_format, arg_backend,
binary = binary, probe_prefix = probe_prefix)
tracetool.generate(sys.stdin, arg_format, arg_backends,
binary=binary, probe_prefix=probe_prefix)
except tracetool.TracetoolError, e:
error_opt(str(e))