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- # -*- coding: utf-8 -*-
- """
- Generic management for the 'vcpu' property.
- """
- __author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
- __copyright__ = "Copyright 2016, Lluís Vilanova <vilanova@ac.upc.edu>"
- __license__ = "GPL version 2 or (at your option) any later version"
- __maintainer__ = "Stefan Hajnoczi"
- __email__ = "stefanha@redhat.com"
- from tracetool import Arguments, try_import
- def transform_event(event):
- """Transform event to comply with the 'vcpu' property (if present)."""
- if "vcpu" in event.properties:
- # events with 'tcg-trans' and 'tcg-exec' are auto-generated from
- # already-patched events
- assert "tcg-trans" not in event.properties
- assert "tcg-exec" not in event.properties
- event.args = Arguments([("void *", "__cpu"), event.args])
- if "tcg" in event.properties:
- fmt = "\"cpu=%p \""
- event.fmt = [fmt + event.fmt[0],
- fmt + event.fmt[1]]
- else:
- fmt = "\"cpu=%p \""
- event.fmt = fmt + event.fmt
- return event
- def transform_args(format, event, *args, **kwargs):
- """Transforms the arguments to suit the specified format.
- The format module must implement function 'vcpu_args', which receives the
- implicit arguments added by the 'vcpu' property, and must return suitable
- arguments for the given format.
- The function is only called for events with the 'vcpu' property.
- Parameters
- ==========
- format : str
- Format module name.
- event : Event
- args, kwargs
- Passed to 'vcpu_transform_args'.
- Returns
- =======
- Arguments
- The transformed arguments, including the non-implicit ones.
- """
- if "vcpu" in event.properties:
- ok, func = try_import("tracetool.format." + format,
- "vcpu_transform_args")
- assert ok
- assert func
- return Arguments([func(event.args[:1], *args, **kwargs),
- event.args[1:]])
- else:
- return event.args
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