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perf annotate-data: Add debug messages

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Add a new debug option "type-profile" to enable the detailed info during
the type analysis especially for instruction tracking.  You can use this
before the command name like 'report' or 'annotate'.

  $ perf --debug type-profile annotate --data-type

Committer testing:

First get some memory events:

  $ perf mem record ls

Then, without data-type profiling debug:

  $ perf annotate --data-type | head
  Annotate type: 'struct rtld_global' in /usr/lib64/ld-linux-x86-64.so.2 (1 samples):
  ============================================================================
      samples     offset       size  field
            1          0       4336  struct rtld_global	 {
            0          0          0      struct link_namespaces*	_dl_ns;
            0       2560          8      size_t	_dl_nns;
            0       2568         40      __rtld_lock_recursive_t	_dl_load_lock {
            0       2568         40          pthread_mutex_t	mutex {
            0       2568         40              struct __pthread_mutex_s	__data {
            0       2568          4                  int	__lock;
  $

And with only data-type profiling:

  $ perf --debug type-profile annotate --data-type | head
  -----------------------------------------------------------
  find_data_type_die [1e67] for reg13873052 (PC) offset=0x150e2 in dl_main
  CU die offset: 0x29cd3
  found PC-rel by addr=0x34020 offset=0x20
  -----------------------------------------------------------
  find_data_type_die [2e] for reg12 offset=0 in __GI___readdir64
  CU die offset: 0x137a45
  frame base: cfa=1 fbreg=-1
  found "__futex" in scope=2/2 (die: 0x137ad5) 0(reg12) type=int (die:2a)
  -----------------------------------------------------------
  find_data_type_die [52] for reg5 offset=0 in __memmove_avx_unaligned_erms
  CU die offset: 0x1124ed
  no variable found
  Annotate type: 'struct rtld_global' in /usr/lib64/ld-linux-x86-64.so.2 (1 samples):
  ============================================================================
      samples     offset       size  field
            1          0       4336  struct rtld_global	 {
            0          0          0      struct link_namespaces*	_dl_ns;
            0       2560          8      size_t	_dl_nns;
            0       2568         40      __rtld_lock_recursive_t	_dl_load_lock {
            0       2568         40          pthread_mutex_t	mutex {
            0       2568         40              struct __pthread_mutex_s	__data {
            0       2568          4                  int	__lock;
  $

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: https://lore.kernel.org/r/20240319055115.4063940-9-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim
2024-03-18 22:51:00 -07:00
committed by Arnaldo Carvalho de Melo
parent 5cdd3fd799
commit 90429524f3
3 changed files with 71 additions and 7 deletions
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3
tools/perf/util/debug.c
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@@ -41,6 +41,7 @@ static int redirect_to_stderr;
int debug_data_convert;
static FILE *_debug_file;
bool debug_display_time;
int debug_type_profile;
FILE *debug_file(void)
{
@@ -231,6 +232,7 @@ static struct sublevel_option debug_opts[] = {
{ .name = "data-convert", .value_ptr = &debug_data_convert },
{ .name = "perf-event-open", .value_ptr = &debug_peo_args },
{ .name = "kmaps", .value_ptr = &debug_kmaps },
{ .name = "type-profile", .value_ptr = &debug_type_profile },
{ .name = NULL, }
};
@@ -270,6 +272,7 @@ int perf_quiet_option(void)
redirect_to_stderr = 0;
debug_peo_args = 0;
debug_kmaps = 0;
debug_type_profile = 0;
return 0;
}