3d211d9f4d
This property identifies events that trace vCPU-specific information. It adds a "CPUState*" argument to events with the property, identifying the vCPU raising the event. TCG translation events also have a "TCGv_env" implicit argument that is later used as the "CPUState*" argument at execution time. Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Message-id: 145641861797.30295.6991314023181842105.stgit@localhost Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
71 lines
2 KiB
Python
71 lines
2 KiB
Python
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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"""
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Generic management for the 'vcpu' property.
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"""
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__author__ = "Lluís Vilanova <vilanova@ac.upc.edu>"
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__copyright__ = "Copyright 2016, 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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from tracetool import Arguments, try_import
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def transform_event(event):
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"""Transform event to comply with the 'vcpu' property (if present)."""
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if "vcpu" in event.properties:
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# events with 'tcg-trans' and 'tcg-exec' are auto-generated from
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# already-patched events
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assert "tcg-trans" not in event.properties
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assert "tcg-exec" not in event.properties
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event.args = Arguments([("CPUState *", "__cpu"), event.args])
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if "tcg" in event.properties:
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fmt = "\"cpu=%p \""
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event.fmt = [fmt + event.fmt[0],
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fmt + event.fmt[1]]
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else:
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fmt = "\"cpu=%p \""
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event.fmt = fmt + event.fmt
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return event
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def transform_args(format, event, *args, **kwargs):
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"""Transforms the arguments to suit the specified format.
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The format module must implement function 'vcpu_args', which receives the
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implicit arguments added by the 'vcpu' property, and must return suitable
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arguments for the given format.
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The function is only called for events with the 'vcpu' property.
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Parameters
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==========
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format : str
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Format module name.
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event : Event
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args, kwargs
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Passed to 'vcpu_transform_args'.
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Returns
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=======
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Arguments
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The transformed arguments, including the non-implicit ones.
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"""
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if "vcpu" in event.properties:
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ok, func = try_import("tracetool.format." + format,
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"vcpu_transform_args")
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assert ok
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assert func
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return Arguments([func(event.args[:1], *args, **kwargs),
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event.args[1:]])
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else:
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return event.args
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