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tracetool: add output filename command-line argument

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The tracetool.py script writes to stdout. This means the output filename
is not available to the script. Add the output filename to the
command-line so that the script has access to the filename.

This also simplifies the tracetool.py invocation. It's no longer
necessary to use meson's custom_build(capture : true) to save output.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20200827142915.108730-2-stefanha@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2020-08-27 15:29:12 +01:00
parent 6745c8a01f
commit c05012a365
5 changed files with 33 additions and 24 deletions
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12
scripts/tracetool.py
View file

@ -16,7 +16,7 @@ __email__ = "stefanha@redhat.com"
import sys
import getopt
from tracetool import error_write, out
from tracetool import error_write, out, out_open
import tracetool.backend
import tracetool.format
@ -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> --backends=<backends> [<options>]
Usage: %(script)s --format=<format> --backends=<backends> [<options>] <trace-events> ... <output>
Backends:
%(backends)s
@ -135,13 +135,15 @@ def main(args):
if probe_prefix is None:
probe_prefix = ".".join(["qemu", target_type, target_name])
if len(args) < 1:
error_opt("missing trace-events filepath")
if len(args) < 2:
error_opt("missing trace-events and output filepaths")
events = []
for arg in args:
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)