linux-kernel - [PATCH v4 8/9] perf annotate: Hide data-type for stack operation and canary

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Message-ID: <20250725193755.12276-9-namhyung@kernel.org>
Date: Fri, 25 Jul 2025 12:37:54 -0700
From: Namhyung Kim <namhyung@...nel.org>
To: Arnaldo Carvalho de Melo <acme@...nel.org>,
	Ian Rogers <irogers@...gle.com>,
	Kan Liang <kan.liang@...ux.intel.com>
Cc: Jiri Olsa <jolsa@...nel.org>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Ingo Molnar <mingo@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-perf-users@...r.kernel.org
Subject: [PATCH v4 8/9] perf annotate: Hide data-type for stack operation and canary

It's mostly unnecessary to print when it has no actual type information
like in the stack operations and canary.  Let's have them if -v option
is given.

Before:
  $ perf annotate --code-with-type
  ...
         : 0    0xd640 <_dl_relocate_object>:
    0.00 :      0:       endbr64
    0.00 :      4:       pushq   %rbp           # data-type: (stack operation)
    0.00 :      5:       movq    %rsp, %rbp
    0.00 :      8:       pushq   %r15           # data-type: (stack operation)
    0.00 :      a:       pushq   %r14           # data-type: (stack operation)
    0.00 :      c:       pushq   %r13           # data-type: (stack operation)
    0.00 :      e:       pushq   %r12           # data-type: (stack operation)
    0.00 :     10:       pushq   %rbx           # data-type: (stack operation)
    0.00 :     11:       subq    $0xf8, %rsp
    ...
    0.00 :     d4:       testl   %eax, %eax
    0.00 :     d6:       jne     0xf424
    0.00 :     dc:       movq    0xf0(%r14), %rbx               # data-type: struct link_map +0xf0
    0.00 :     e3:       testq   %rbx, %rbx
    0.00 :     e6:       jne     0xf2dd
    0.00 :     ec:       cmpq    $0, 0xf8(%r14)         # data-type: struct link_map +0xf8
    ...

After:
         : 0    0xd640 <_dl_relocate_object>:
    0.00 :      0:       endbr64
    0.00 :      4:       pushq   %rbp
    0.00 :      5:       movq    %rsp, %rbp
    0.00 :      8:       pushq   %r15
    0.00 :      a:       pushq   %r14
    0.00 :      c:       pushq   %r13
    0.00 :      e:       pushq   %r12
    0.00 :     10:       pushq   %rbx
    0.00 :     11:       subq    $0xf8, %rsp
    ...
    0.00 :     d4:       testl   %eax, %eax
    0.00 :     d6:       jne     0xf424
    0.00 :     dc:       movq    0xf0(%r14), %rbx               # data-type: struct link_map +0xf0
    0.00 :     e3:       testq   %rbx, %rbx
    0.00 :     e6:       jne     0xf2dd
    0.00 :     ec:       cmpq    $0, 0xf8(%r14)         # data-type: struct link_map +0xf8
    ...

Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/util/annotate.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 06ddc7a9f58722a4..6fc07971631ac8a3 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -765,6 +765,17 @@ __hist_entry__get_data_type(struct hist_entry *he, struct arch *arch,
 			    struct debuginfo *dbg, struct disasm_line *dl,
 			    int *type_offset);
 
+static bool needs_type_info(struct annotated_data_type *data_type)
+{
+	if (data_type == NULL || data_type == NO_TYPE)
+		return false;
+
+	if (verbose)
+		return true;
+
+	return (data_type != &stackop_type) && (data_type != &canary_type);
+}
+
 static int
 annotation_line__print(struct annotation_line *al, struct annotation_print_data *apd,
 		       struct annotation_options *opts, int printed,
@@ -844,7 +855,7 @@ annotation_line__print(struct annotation_line *al, struct annotation_print_data
 
 			data_type = __hist_entry__get_data_type(apd->he, apd->arch,
 								apd->dbg, dl, &offset);
-			if (data_type && data_type != NO_TYPE) {
+			if (needs_type_info(data_type)) {
 				char buf[4096];
 
 				printf("\t\t# data-type: %s",
@@ -2138,7 +2149,7 @@ void annotation_line__write(struct annotation_line *al, struct annotation *notes
 								apd->dbg,
 								disasm_line(al),
 								&offset);
-			if (data_type && data_type != NO_TYPE) {
+			if (needs_type_info(data_type)) {
 				char member[256];
 
 				printed = scnprintf(bf, sizeof(bf),
-- 
2.50.1