From 5b808275f3bbe8cc95bb9301f4d5a41331d0e0e6 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Llu=C3=ADs=20Vilanova?= Date: Tue, 27 May 2014 15:02:14 +0200 Subject: trace: Multi-backend tracing MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Adds support to compile QEMU with multiple tracing backends at the same time. For example, you can compile QEMU with: $ ./configure --enable-trace-backends=ftrace,dtrace Where 'ftrace' can be handy for having an in-flight record of events, and 'dtrace' can be later used to extract more information from the system. This patch allows having both available without recompiling QEMU. Signed-off-by: Lluís Vilanova Signed-off-by: Stefan Hajnoczi --- scripts/tracetool/backend/__init__.py | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) (limited to 'scripts/tracetool/backend/__init__.py') diff --git a/scripts/tracetool/backend/__init__.py b/scripts/tracetool/backend/__init__.py index 5e36f0415d..5bfa1efc5c 100644 --- a/scripts/tracetool/backend/__init__.py +++ b/scripts/tracetool/backend/__init__.py @@ -99,17 +99,18 @@ def exists(name): class Wrapper: - def __init__(self, backend, format): - self._backend = backend.replace("-", "_") + def __init__(self, backends, format): + self._backends = [backend.replace("-", "_") for backend in backends] self._format = format.replace("-", "_") - assert exists(self._backend) + assert all(exists(backend) for backend in self._backends) assert tracetool.format.exists(self._format) def _run_function(self, name, *args, **kwargs): - func = tracetool.try_import("tracetool.backend." + self._backend, - name % self._format, None)[1] - if func is not None: - func(*args, **kwargs) + for backend in self._backends: + func = tracetool.try_import("tracetool.backend." + backend, + name % self._format, None)[1] + if func is not None: + func(*args, **kwargs) def generate_begin(self, events): self._run_function("generate_%s_begin", events) -- cgit v1.2.3