| Rudolf Marek | 8679e52 | 2011-09-02 23:34:15 +0200 | [diff] [blame] | 1 | Function tracing |
| 2 | ---------------- |
| 3 | |
| 4 | Enable CONFIG_TRACE in debug menu. Run the compiled image on target. You will get |
| 5 | a log with a lot of lines like: |
| 6 | |
| 7 | ... |
| 8 | ~0x001072e8(0x00100099) |
| 9 | ~0x00108bc0(0x0010730a) |
| 10 | ... |
| 11 | |
| 12 | First address is address of function which was just entered, the second address |
| 13 | is address of functions which call that. |
| 14 | |
| 15 | You can use the log2dress to dress the log again: |
| 16 | |
| 17 | ... |
| 18 | src/arch/x86/lib/c_start.S:85 calls /home/ruik/coreboot/src/boot/selfboot.c:367 |
| Stefan Reinauer | 8d71155 | 2012-11-30 12:34:04 -0800 | [diff] [blame] | 19 | /home/ruik/coreboot/src/boot/selfboot.c:370 calls /home/ruik/coreboot/src/device/device.c:325 |
| Rudolf Marek | 8679e52 | 2011-09-02 23:34:15 +0200 | [diff] [blame] | 20 | ... |
| 21 | |
| 22 | Alternatively, you can use genprof to generate a gmon.out file, which can be used |
| 23 | by gprof to show the call traces. You will need to install uthash library to compile |
| 24 | that. |
| 25 | |
| 26 | Great use is: |
| 27 | |
| 28 | make |
| Furquan Shaikh | 20f25dd | 2014-04-22 10:41:05 -0700 | [diff] [blame] | 29 | ./genprof /tmp/yourlog ; gprof ../../build/ramstage | ./gprof2dot.py -e0 -n0 | dot -Tpng -o output.png |
| Rudolf Marek | 8679e52 | 2011-09-02 23:34:15 +0200 | [diff] [blame] | 30 | |
| 31 | Which generates a PNG with a call graph. |