diff options
| author | Namhyung Kim <namhyung@kernel.org> | 2024-09-09 14:42:51 -0700 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2024-09-10 17:32:47 -0300 |
| commit | 02648783c2e1ed24cba23477282fa8cbc1525a77 (patch) | |
| tree | a170bff03fa7924379ef5e19c48278bb2f78b642 /tools/perf | |
| parent | c8b9358778a82534251dc93ebc4601246d5ae04e (diff) | |
| download | lwn-02648783c2e1ed24cba23477282fa8cbc1525a77.tar.gz lwn-02648783c2e1ed24cba23477282fa8cbc1525a77.zip | |
perf annotate-data: Add pr_debug_scope()
The pr_debug_scope() is to print more information about the scope DIE
during the instruction tracking so that it can help finding relevant
debug info and the source code like inlined functions more easily.
$ perf --debug type-profile annotate --data-type
...
-----------------------------------------------------------
find data type for 0(reg0, reg12) at set_task_cpu+0xdd
CU for kernel/sched/core.c (die:0x1268dae)
frame base: cfa=1 fbreg=7
scope: [3/3] (die:12b6d28) [inlined] set_task_rq <<<--- (here)
bb: [9f - dd]
var [9f] reg3 type='struct task_struct*' size=0x8 (die:0x126aff0)
var [9f] reg6 type='unsigned int' size=0x4 (die:0x1268e0d)
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: https://lore.kernel.org/r/20240909214251.3033827-2-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/util/annotate-data.c | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/tools/perf/util/annotate-data.c b/tools/perf/util/annotate-data.c index a0ea4e07e570..976abedca09e 100644 --- a/tools/perf/util/annotate-data.c +++ b/tools/perf/util/annotate-data.c @@ -131,6 +131,26 @@ static void pr_debug_location(Dwarf_Die *die, u64 pc, int reg) } } +static void pr_debug_scope(Dwarf_Die *scope_die) +{ + int tag; + + if (!debug_type_profile && verbose < 3) + return; + + pr_info("(die:%lx) ", (long)dwarf_dieoffset(scope_die)); + + tag = dwarf_tag(scope_die); + if (tag == DW_TAG_subprogram) + pr_info("[function] %s\n", dwarf_diename(scope_die)); + else if (tag == DW_TAG_inlined_subroutine) + pr_info("[inlined] %s\n", dwarf_diename(scope_die)); + else if (tag == DW_TAG_lexical_block) + pr_info("[block]\n"); + else + pr_info("[unknown] tag=%x\n", tag); +} + bool has_reg_type(struct type_state *state, int reg) { return (unsigned)reg < ARRAY_SIZE(state->regs); @@ -1305,8 +1325,9 @@ static enum type_match_result find_data_type_block(struct data_loc_info *dloc, if (dwarf_ranges(&scopes[i], 0, &base, &start, &end) < 0) break; - pr_debug_dtp("scope: [%d/%d] (die:%lx)\n", - i + 1, nr_scopes, (long)dwarf_dieoffset(&scopes[i])); + pr_debug_dtp("scope: [%d/%d] ", i + 1, nr_scopes); + pr_debug_scope(&scopes[i]); + src_ip = map__objdump_2rip(dloc->ms->map, start); again: |