Stefan Hajnoczi <stefa...@redhat.com> writes: > On Mon, Mar 24, 2014 at 05:04:54PM +0000, alex.ben...@linaro.org wrote: >> From: Alex Bennée <alex.ben...@linaro.org> >> >> This makes the UST backend pay attention to the format string arguments >> that are defined when defining payload data. With this you can now >> ensure integers are reported in hex mode if you want. >> >> Signed-off-by: Alex Bennée <alex.ben...@linaro.org> >> --- >> scripts/tracetool/__init__.py | 13 +++++++++++-- >> scripts/tracetool/backend/ust.py | 16 ++++++++++++---- >> 2 files changed, 23 insertions(+), 6 deletions(-) > > How are strings handled, can LTTng copy them from the QEMU process' > memory space?
lttng provides ctf_string for passing strings to the payload. But I wouldn't expect to use them for the result of format string calculations as that would defeat the point of the low impact tracing. There are a number of trace-events that pass strings for various things. I've not actually experimented with the output of any of them though. > > Stefan -- Alex Bennée
