80dd5c4918
The declarations in the generated-tracers.h file are assuming there's only ever going to be one instance of this header, as they are not namespaced. When we have one header per event group, if a single source file needs to include multiple sets of trace events, the symbols will all clash. This change thus introduces a '--group NAME' arg to the 'tracetool' program. This will cause all the symbols in the generated header files to be given a unique namespace. If no group is given, the group name 'common' is used, which is suitable for the current usage where there is only one global trace-events file used for code generation. Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Daniel P. Berrange <berrange@redhat.com> Reviewed-by: Lluís Vilanova <vilanova@ac.upc.edu> Message-id: 1475588159-30598-21-git-send-email-berrange@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
86 lines
2.4 KiB
Python
86 lines
2.4 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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Format management.
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Creating new formats
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--------------------
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A new format named 'foo-bar' corresponds to Python module
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'tracetool/format/foo_bar.py'.
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A format module should provide a docstring, whose first non-empty line will be
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considered its short description.
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All formats must generate their contents through the 'tracetool.out' routine.
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Format functions
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----------------
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======== ==================================================================
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Function Description
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======== ==================================================================
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generate Called to generate a format-specific file.
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======== ==================================================================
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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 os
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import tracetool
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def get_list():
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"""Get a list of (name, description) pairs."""
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res = []
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modnames = []
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for filename in os.listdir(tracetool.format.__path__[0]):
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if filename.endswith('.py') and filename != '__init__.py':
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modnames.append(filename.rsplit('.', 1)[0])
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for modname in sorted(modnames):
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module = tracetool.try_import("tracetool.format." + modname)
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# just in case; should never fail unless non-module files are put there
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if not module[0]:
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continue
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module = module[1]
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doc = module.__doc__
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if doc is None:
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doc = ""
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doc = doc.strip().split("\n")[0]
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name = modname.replace("_", "-")
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res.append((name, doc))
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return res
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def exists(name):
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"""Return whether the given format exists."""
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if len(name) == 0:
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return False
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name = name.replace("-", "_")
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return tracetool.try_import("tracetool.format." + name)[1]
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def generate(events, format, backend, group):
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if not exists(format):
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raise ValueError("unknown format: %s" % format)
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format = format.replace("-", "_")
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func = tracetool.try_import("tracetool.format." + format,
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"generate")[1]
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if func is None:
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raise AttributeError("format has no 'generate': %s" % format)
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func(events, backend, group)
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