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| author | Daniel P. Berrange | 2016-10-04 15:35:51 +0200 |
|---|---|---|
| committer | Stefan Hajnoczi | 2016-10-12 09:35:54 +0200 |
| commit | 8ed5372874377af4a84a330eeaff1d9d663ca930 (patch) | |
| tree | 56df50260e123fea831136b9f3a4b9066cb34430 /scripts/tracetool/format/events_c.py | |
| parent | trace: emit name <-> ID mapping in simpletrace header (diff) | |
| download | qemu-8ed5372874377af4a84a330eeaff1d9d663ca930.tar.gz qemu-8ed5372874377af4a84a330eeaff1d9d663ca930.tar.xz qemu-8ed5372874377af4a84a330eeaff1d9d663ca930.zip | |
trace: don't abort qemu if ftrace can't be initialized
If the ftrace backend is compiled into QEMU, any attempt
to start QEMU while non-root will fail due to the
inability to open /sys/kernel/debug/tracing/tracing_on.
Add a fallback into the code so that it connects up the
trace_marker_fd variable to /dev/null when getting
EACCES on the 'trace_on' file. This allows QEMU to
run, with ftrace turned into a no-op.
[Fixed s/setting/getting/ and s/EACCESS/EACCES/ errors pointed out by
Eric Blake <eblake@redhat.com>.
--Stefan]
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-id: 1475588159-30598-13-git-send-email-berrange@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'scripts/tracetool/format/events_c.py')
0 files changed, 0 insertions, 0 deletions