Re: [PATCH V7 4/4] Adjust objdump start/end range per map pgoff parameter

[Leo Yan <leo.yan@arm.com>]

On 9/5/24 23:28, Steve Clevenger wrote:
> 
> Extract map_pgoff parameter from the dictionary, and adjust start/end
> range passed to objdump based on the value.
> 
> A zero start_addr is filtered to prevent output of dso address range
> check failures. This script repeatedly sees a zero value passed
> in for
>       start_addr = cpu_data[str(cpu) + 'addr']
> 
> These zero values are not a new problem. The start_addr/stop_addr warning
> clutters the instruction trace output, hence this change.
> 
> Signed-off-by: Steve Clevenger <scclevenger@os.amperecomputing.com>
> ---
>   tools/perf/scripts/python/arm-cs-trace-disasm.py | 14 +++++++++-----
>   1 file changed, 9 insertions(+), 5 deletions(-)
> 
> diff --git a/tools/perf/scripts/python/arm-cs-trace-disasm.py b/tools/perf/scripts/python/arm-cs-trace-disasm.py
> index 7aff02d84ffb..a867e0db02b8 100755
> --- a/tools/perf/scripts/python/arm-cs-trace-disasm.py
> +++ b/tools/perf/scripts/python/arm-cs-trace-disasm.py
> @@ -187,6 +187,7 @@ def process_event(param_dict):
>          dso_start = get_optional(param_dict, "dso_map_start")
>          dso_end = get_optional(param_dict, "dso_map_end")
>          symbol = get_optional(param_dict, "symbol")
> +       map_pgoff = get_optional(param_dict, "map_pgoff")


I am concerned the two sentences below are inconsistence: one uses
'start_addr + map_pgoff' and the other uses 'start_addr + int(map_pgoff)'.

Here about below code?

            map_pgoff_str = get_optional(param_dict, "map_pgoff")
	   if map_pgoff_str == "":
		map_pgoff = 0
            else:
		map_pgoff = int(map_pgoff_str)

With above change, 'map_pgoff' is an int type. As a result, the changes
below can simply add 'map_pgoff'.

With these changes, LGTM:

Reviewed-by: Leo Yan <leo.yan@arm.com>


>          cpu = sample["cpu"]
>          ip = sample["ip"]
> @@ -243,9 +244,11 @@ def process_event(param_dict):
>          # Record for previous sample packet
>          cpu_data[str(cpu) + 'addr'] = addr
> 
> -       # Handle CS_ETM_TRACE_ON packet if start_addr=0 and stop_addr=4
> -       if (start_addr == 0 and stop_addr == 4):
> -               print("CPU%d: CS_ETM_TRACE_ON packet is inserted" % cpu)
> +       # Filter out zero start_address. Optionally identify CS_ETM_TRACE_ON packet
> +       # if start_addr=0 and stop_addr=4.
> +       if (start_addr == 0):
> +               if ((stop_addr == 4) and (options.verbose == True)):
> +                       print("CPU%d: CS_ETM_TRACE_ON packet is inserted" % cpu)
>                  return
> 
>          if (start_addr < int(dso_start) or start_addr > int(dso_end)):
> @@ -262,13 +265,14 @@ def process_event(param_dict):
>                  # vm_start to zero.
>                  if (dso == "[kernel.kallsyms]" or dso_start == 0x400000):
>                          dso_vm_start = 0
> +                       map_pgoff = 0
>                  else:
>                          dso_vm_start = int(dso_start)
> 
>                  dso_fname = get_dso_file_path(dso, dso_bid)
>                  if path.exists(dso_fname):
> -                       print_disam(dso_fname, dso_vm_start, start_addr, stop_addr)
> +                       print_disam(dso_fname, dso_vm_start, start_addr + map_pgoff, stop_addr + map_pgoff)
>                  else:
> -                       print("Failed to find dso %s for address range [ 0x%x .. 0x%x ]" % (dso, start_addr, stop_addr))
> +                       print("Failed to find dso %s for address range [ 0x%x .. 0x%x ]" % (dso, start_addr + int(map_pgoff), stop_addr + int(map_pgoff)))

> 
>          print_srccode(comm, param_dict, sample, symbol, dso)
> --
> 2.44.0
>