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Message-ID: <20240507041338.2081775-1-namhyung@kernel.org>
Date: Mon, 6 May 2024 21:13:38 -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,
Masami Hiramatsu <mhiramat@...nel.org>
Subject: [PATCH] perf dwarf-aux: Print array type name with "[]"
It's confusing both pointers and arrays are printed as *. Let's print
array types with [] so that we can identify them easily. Although it's
interchangable, sometimes it can cause confusion with size like in the
below example.
Note that it is not the same with C syntax where it goes to the variable
names, but we want to have it in the type names (like in Go language).
Before:
mov [20] 0x68(reg5) -> reg0 type='struct page**' size=0x80 (die:0x4e61d32)
After:
mov [20] 0x68(reg5) -> reg0 type='struct page*[]' size=0x80 (die:0x4e61d32)
Cc: Masami Hiramatsu <mhiramat@...nel.org>
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
tools/perf/util/dwarf-aux.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/dwarf-aux.c b/tools/perf/util/dwarf-aux.c
index c0a492e65388..ec988f294497 100644
--- a/tools/perf/util/dwarf-aux.c
+++ b/tools/perf/util/dwarf-aux.c
@@ -1110,8 +1110,10 @@ int die_get_typename_from_type(Dwarf_Die *type_die, struct strbuf *buf)
const char *tmp = "";
tag = dwarf_tag(type_die);
- if (tag == DW_TAG_array_type || tag == DW_TAG_pointer_type)
+ if (tag == DW_TAG_pointer_type)
tmp = "*";
+ else if (tag == DW_TAG_array_type)
+ tmp = "[]";
else if (tag == DW_TAG_subroutine_type) {
/* Function pointer */
return strbuf_add(buf, "(function_type)", 15);
--
2.45.0.rc1.225.g2a3ae87e7f-goog
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