| # -*- 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: |
| event.args = Arguments([("void *", "__cpu"), event.args]) |
| 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 |
