| Lluís Vilanova | 3d211d9 | 2016-02-25 17:43:38 +0100 | [diff] [blame] | 1 | #!/usr/bin/env python |
| 2 | # -*- coding: utf-8 -*- |
| 3 | |
| 4 | """ |
| 5 | Generic management for the 'vcpu' property. |
| 6 | |
| 7 | """ |
| 8 | |
| 9 | __author__ = "Lluís Vilanova <vilanova@ac.upc.edu>" |
| 10 | __copyright__ = "Copyright 2016, Lluís Vilanova <vilanova@ac.upc.edu>" |
| 11 | __license__ = "GPL version 2 or (at your option) any later version" |
| 12 | |
| 13 | __maintainer__ = "Stefan Hajnoczi" |
| 14 | __email__ = "stefanha@linux.vnet.ibm.com" |
| 15 | |
| 16 | |
| 17 | from tracetool import Arguments, try_import |
| 18 | |
| 19 | |
| 20 | def transform_event(event): |
| 21 | """Transform event to comply with the 'vcpu' property (if present).""" |
| 22 | if "vcpu" in event.properties: |
| 23 | # events with 'tcg-trans' and 'tcg-exec' are auto-generated from |
| 24 | # already-patched events |
| 25 | assert "tcg-trans" not in event.properties |
| 26 | assert "tcg-exec" not in event.properties |
| 27 | |
| 28 | event.args = Arguments([("CPUState *", "__cpu"), event.args]) |
| 29 | if "tcg" in event.properties: |
| 30 | fmt = "\"cpu=%p \"" |
| 31 | event.fmt = [fmt + event.fmt[0], |
| 32 | fmt + event.fmt[1]] |
| 33 | else: |
| 34 | fmt = "\"cpu=%p \"" |
| 35 | event.fmt = fmt + event.fmt |
| 36 | return event |
| 37 | |
| 38 | |
| 39 | def transform_args(format, event, *args, **kwargs): |
| 40 | """Transforms the arguments to suit the specified format. |
| 41 | |
| 42 | The format module must implement function 'vcpu_args', which receives the |
| 43 | implicit arguments added by the 'vcpu' property, and must return suitable |
| 44 | arguments for the given format. |
| 45 | |
| 46 | The function is only called for events with the 'vcpu' property. |
| 47 | |
| 48 | Parameters |
| 49 | ========== |
| 50 | format : str |
| 51 | Format module name. |
| 52 | event : Event |
| 53 | args, kwargs |
| 54 | Passed to 'vcpu_transform_args'. |
| 55 | |
| 56 | Returns |
| 57 | ======= |
| 58 | Arguments |
| 59 | The transformed arguments, including the non-implicit ones. |
| 60 | |
| 61 | """ |
| 62 | if "vcpu" in event.properties: |
| 63 | ok, func = try_import("tracetool.format." + format, |
| 64 | "vcpu_transform_args") |
| 65 | assert ok |
| 66 | assert func |
| 67 | return Arguments([func(event.args[:1], *args, **kwargs), |
| 68 | event.args[1:]]) |
| 69 | else: |
| 70 | return event.args |
