commit 5b808275f3bbe8cc95bb9301f4d5a41331d0e0e6
author Lluís Vilanova <vilanova@ac.upc.edu> Tue May 27 15:02:14 2014 +0200
committer Stefan Hajnoczi <stefanha@redhat.com> Mon Jun 09 15:43:40 2014 +0200
tree d5611a010851864336448529088cd94a9afcf83a
parent 82432638ebeedda8a2e18838b6fbef4b14a94f31

trace: Multi-backend tracing

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 <vilanova@ac.upc.edu>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

.travis.yml

diff --git a/.travis.yml b/.travis.yml
index 04da9736..89c30ae 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -66,16 +66,16 @@
       compiler: gcc
     # All the trace backends (apart from dtrace)
     - env: TARGETS=i386-softmmu,x86_64-softmmu
-           EXTRA_CONFIG="--enable-trace-backend=stderr"
+           EXTRA_CONFIG="--enable-trace-backends=stderr"
       compiler: gcc
     - env: TARGETS=i386-softmmu,x86_64-softmmu
-           EXTRA_CONFIG="--enable-trace-backend=simple"
+           EXTRA_CONFIG="--enable-trace-backends=simple"
       compiler: gcc
     - env: TARGETS=i386-softmmu,x86_64-softmmu
-           EXTRA_CONFIG="--enable-trace-backend=ftrace"
+           EXTRA_CONFIG="--enable-trace-backends=ftrace"
            TEST_CMD=""
       compiler: gcc
     - env: TARGETS=i386-softmmu,x86_64-softmmu
           EXTRA_PKGS="liblttng-ust-dev liburcu-dev"
-          EXTRA_CONFIG="--enable-trace-backend=ust"
+          EXTRA_CONFIG="--enable-trace-backends=ust"
       compiler: gcc