perf trace: Format instruction pointer fields as hexadecimal

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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>

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This commit is contained in:

Aaron Tomlin 2026-07-19 15:10:00 -04:00 • committed by Namhyung Kim

parent ab74d1fbe0

commit da85966dfd

1 changed files with 15 additions and 2 deletions

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tools/perf/builtin-trace.c

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