[PATCH v5 0/2] perf script python: Add script for CoreSight disassembly

[Leo Yan]

This patch set is to restart the upstreaming for CoreSight disassembly
script [1], the python script can be used to dump assembly, source line
and symbols so it can be easier for humans inspecting.

The first patch changes python script engine to expose more information
for DSO and maps, so it's helpful for disassembly with objdump program.

The second patch is to introduce the python script for CoreSight trace
data disassembly for branch samples.  It also can dump source line and
symbol info for instruction samples.

This patch set has been tested on Arm64 Juno board:

  # perf script -s scripts/python/arm-cs-trace-disasm.py
  ...
  main  6728/6728  [004]         0.000000000  main+0x40                                /root/coresight_test/main.c                    for (i = 0; i < 10000; i++) {
  main  6728/6728  [004]         0.000000000  main+0x20                                /root/coresight_test/main.c                            val = lib_loop_test(100);
  main  6728/6728  [004]         0.000000000  lib_loop_test@plt+0xc                    /root/coresight_test/main
  main  6728/6728  [004]         0.000000000  lib_loop_test+0xc                        /root/coresight_test/libcstest.c               for (i = 0; i < 5; i++)
  main  6728/6728  [004]         0.000000000  lib_loop_test+0x30
  main  6728/6728  [004]         0.000000000  lib_loop_test+0x30
  main  6728/6728  [004]         0.000000000  lib_loop_test+0x30
  main  6728/6728  [004]         0.000000000  lib_loop_test+0x30
  main  6728/6728  [004]         0.000000000  lib_loop_test+0x30
  main  6728/6728  [004]         0.000000000  lib_loop_test+0x3c                       /root/coresight_test/libcstest.c          }

  # perf script -s scripts/python/arm-cs-trace-disasm.py -- -d llvm-objdump-11 -k ./vmlinux
  ARM CoreSight Trace Data Assembler Dump
        ffff800008eb3198 <etm4_enable_hw>:
        ffff800008eb3310: c0 38 00 35   cbnz    w0, 0xffff800008eb3a28 <etm4_enable_hw+0x890>
        ffff800008eb3314: 9f 3f 03 d5   dsb     sy
        ffff800008eb3318: df 3f 03 d5   isb
        ffff800008eb331c: f5 5b 42 a9   ldp     x21, x22, [sp, #32]
        ffff800008eb3320: fb 73 45 a9   ldp     x27, x28, [sp, #80]
        ffff800008eb3324: e0 82 40 39   ldrb    w0, [x23, #32]
        ffff800008eb3328: 60 00 00 34   cbz     w0, 0xffff800008eb3334 <etm4_enable_hw+0x19c>
        ffff800008eb332c: e0 03 19 aa   mov     x0, x25
        ffff800008eb3330: 8c fe ff 97   bl      0xffff800008eb2d60 <etm4_cs_lock.isra.0.part.0>
            main  6055/6055  [004]         0.000000000  etm4_enable_hw+0x198                     [kernel.kallsyms]
        ffff800008eb2d60 <etm4_cs_lock.isra.0.part.0>:
        ffff800008eb2d60: 1f 20 03 d5   nop
        ffff800008eb2d64: 1f 20 03 d5   nop
        ffff800008eb2d68: 3f 23 03 d5   hint    #25
        ffff800008eb2d6c: 00 00 40 f9   ldr     x0, [x0]
        ffff800008eb2d70: 9f 3f 03 d5   dsb     sy
        ffff800008eb2d74: 00 c0 3e 91   add     x0, x0, #4016
        ffff800008eb2d78: 1f 00 00 b9   str     wzr, [x0]
        ffff800008eb2d7c: bf 23 03 d5   hint    #29
        ffff800008eb2d80: c0 03 5f d6   ret
            main  6055/6055  [004]         0.000000000  etm4_cs_lock.isra.0.part.0+0x20

  # perf script -s scripts/python/arm-cs-trace-disasm.py -- -d objdump -k ./vmlinux
  ARM CoreSight Trace Data Assembler Dump
        ffff800008eb3310 <etm4_enable_hw+0x178>:
        ffff800008eb3310:       350038c0        cbnz    w0, ffff800008eb3a28 <etm4_enable_hw+0x890>
        ffff800008eb3314:       d5033f9f        dsb     sy
        ffff800008eb3318:       d5033fdf        isb
        ffff800008eb331c:       a9425bf5        ldp     x21, x22, [sp, #32]
        ffff800008eb3320:       a94573fb        ldp     x27, x28, [sp, #80]
        ffff800008eb3324:       394082e0        ldrb    w0, [x23, #32]
        ffff800008eb3328:       34000060        cbz     w0, ffff800008eb3334 <etm4_enable_hw+0x19c>
        ffff800008eb332c:       aa1903e0        mov     x0, x25
        ffff800008eb3330:       97fffe8c        bl      ffff800008eb2d60 <etm4_cs_lock.isra.0.part.0>
            main  6055/6055  [004]         0.000000000  etm4_enable_hw+0x198                     [kernel.kallsyms]
        ffff800008eb2d60 <etm4_cs_lock.isra.0.part.0>:
        ffff800008eb2d60:       d503201f        nop
        ffff800008eb2d64:       d503201f        nop
        ffff800008eb2d68:       d503233f        paciasp
        ffff800008eb2d6c:       f9400000        ldr     x0, [x0]
        ffff800008eb2d70:       d5033f9f        dsb     sy
        ffff800008eb2d74:       913ec000        add     x0, x0, #0xfb0
        ffff800008eb2d78:       b900001f        str     wzr, [x0]
        ffff800008eb2d7c:       d50323bf        autiasp
        ffff800008eb2d80:       d65f03c0        ret
            main  6055/6055  [004]         0.000000000  etm4_cs_lock.isra.0.part.0+0x20

[1] https://lists.linaro.org/archives/list/coresight@xxxxxxxxxxxxxxxx/thread/GIJCSSARXTSEC5GVZUZ5M7FB5NOWIODE/#Z72EE4GS7S5E27QBSCWP3NNE2R6B6K6C

Changes from v4:
* Enhanced python script engine for DSO and map infos;
* Rewrote the python script, added support for symbol and source line
  dumping.


Leo Yan (2):
  perf scripting python: Expose dso and map information
  perf scripts python: Support Arm CoreSight trace data disassembly

 .../scripts/python/arm-cs-trace-disasm.py     | 275 ++++++++++++++++++
 .../scripting-engines/trace-event-python.c    |  21 +-
 2 files changed, 292 insertions(+), 4 deletions(-)
 create mode 100755 tools/perf/scripts/python/arm-cs-trace-disasm.py

-- 
2.25.1