perf trace: Format instruction pointer fields as hexadecimal

Provide a helper function trace__field_is_ip() in
trace__fprintf_tp_fields() to ensure that tracepoint fields representing
instruction pointers such as "__probe_ip", "caller_ip", and
"call_site" are always formatted as hexadecimal memory addresses rather
than signed integers.

For example, when running a kmem:kfree tracepoint:

    # perf trace --show-cpu --event kmem:kfree --max-event 1

    Before this change, "call_site" was represented as a signed integer:
      0.000 [003] xfce4-terminal/2201 kmem:kfree(call_site: -1714572588, ptr: 0xffff8afee0303000)

    After this change, "call_site" is correctly represented in hexadecimal:
      0.000 [003] xfce4-terminal/2201 kmem:kfree(call_site: 0xffffffff99cf1194, ptr: 0xffff8afee0303000)

This improves the readability of perf trace output by making code
addresses straightforward to parse and map to kernel symbols.

Signed-off-by: Aaron Tomlin <atomlin@atomlin.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>

0 files changed, 0 insertions, 0 deletions