At present we show 'main section' as the top-level section name. It may
be more helpful to show the actual image name. This is tricky because
Image is a parent class of Entry_section, so there is no distinction
between an image and a section.

Update it to show the image name.

Signed-off-by: Simon Glass <sjg@chromium.org>

Move to the latest tag for "Jammy" and rebuild the containers.

Signed-off-by: Tom Rini <trini@konsulko.com>

Build trace-cmd as part of the docker image, so that trace tests can be
used. Unfortunately the version provided by distributions is a little old
and has bugs. It also does not support specifying the time base for the
trace, which is required to convert microseconds to nanaseconds.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add a second variant of the flame graph that shows records in terms of the
number of microseconds used by each call stack. This is a useful way of
seeing where time is going within the execution of U-Boot.

This requires a call stack that records the start time of each function,
as well as a way of subtracting all time consumed by child functions, so
that this time is not counted twice by the flamegraph. The time values in
the output are just for the function itself, not for its children.

Signed-off-by: Simon Glass <sjg@chromium.org>

It is useful to see how many times each function is called, particularly
in the context of its callers. A flamegraph is a way of showing this.

Support output in this format which can be used by the flamegraph.pl
script, to generate an SVG image for browsing.

Signed-off-by: Simon Glass <sjg@chromium.org>

Add support for writing ftrace records in the 'funcgraph' format, which
shows function entry and exit points as well as the time taken by each
function.

Signed-off-by: Simon Glass <sjg@chromium.org>

Use the information in the trace header instead of reading it from the
trace records. Add debugging to check that System.map and the trace header
agree on this value.

Signed-off-by: Simon Glass <sjg@chromium.org>

This feature was only partly implemented and serves no current purpose.
Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>

The old text format is not much used anymore. Instead a new trace-cmd tool
has introduced a binary format for trace records.

Add support for generating this format. This involves removing the old
text format, adding various helpers for the new format and adjusting the
code to use an output file instead of stdout.

Signed-off-by: Simon Glass <sjg@chromium.org>

The current use of 'profile' in some places is confusing. Update the code
to use the word 'trace' consistently. Change the flags to better match
their meaning and add some more comments.

Signed-off-by: Simon Glass <sjg@chromium.org>