coreboot-kgpe-d16

History

Daniele Forsi ea70a5068f util/genprof: improve handling of command line arguments Accept only one command line argument (the input file name); close input stream both on error and on success; print more informative error messages when files could not be opened. Change-Id: Ib2f0622a332317d7a13f33f1e5787381804c43a9 Found-by: missing fclose()'s found by Cppcheck 1.65 Signed-off-by: Daniele Forsi <dforsi@gmail.com> Reviewed-on: http://review.coreboot.org/6573 Tested-by: build bot (Jenkins) Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>		2014-08-12 09:02:44 +02:00
..
Makefile	Add support utils for tracing	2011-09-07 01:27:57 +02:00
README	Rename coreboot_ram stage to ramstage	2014-04-26 13:27:09 +02:00
genprof.c	util/genprof: improve handling of command line arguments	2014-08-12 09:02:44 +02:00
log2dress	Rename coreboot_ram stage to ramstage	2014-04-26 13:27:09 +02:00

README

Function tracing
----------------

Enable CONFIG_TRACE in debug menu. Run the compiled image on target. You will get
a log with a lot of lines like:

...
~0x001072e8(0x00100099)
~0x00108bc0(0x0010730a)
...

First address is address of function which was just entered, the second address
is address of functions which call that.

You can use the log2dress to dress the log again:

...
src/arch/x86/lib/c_start.S:85 calls /home/ruik/coreboot/src/boot/selfboot.c:367
/home/ruik/coreboot/src/boot/selfboot.c:370 calls /home/ruik/coreboot/src/device/device.c:325
...

Alternatively, you can use genprof to generate a gmon.out file, which can be used
by gprof to show the call traces. You will need to install uthash library to compile
that.

Great use is:

make
./genprof /tmp/yourlog ;  gprof ../../build/ramstage |  ./gprof2dot.py -e0 -n0 | dot -Tpng -o output.png

Which generates a PNG with a call graph.