Re: [PATCH/RFT] Re: [PATCH v5 1/8] perf trace: Fix iteration of syscall ids in syscalltbl->entries

[Jiri Slaby]

On 09. 10. 24, 8:58, Howard Chu wrote:
> If Namhyung's fix alone does not solve the problem please try this:

Hi,

it obviously did not. But this one indeed does.

> --- a/tools/perf/util/syscalltbl.c
> +++ b/tools/perf/util/syscalltbl.c
> @@ -46,6 +46,11 @@ static const char *const *syscalltbl_native =
> syscalltbl_mips_n64;
>   #include <asm/syscalls.c>
>   const int syscalltbl_native_max_id = SYSCALLTBL_LOONGARCH_MAX_ID;
>   static const char *const *syscalltbl_native = syscalltbl_loongarch;
> +#else
> +const int syscalltbl_native_max_id = 1;

This ^^^ should be 0 IMO. Look:
        for (i = 0; i <= syscalltbl_native_max_id; ++i)
                if (syscalltbl_native[i])
                        ++nr_entries;

> +static const char *const syscalltbl_native[] = {
> +       [0] = "unknown",
> +};
>   #endif
>
>   struct syscall {
> @@ -182,6 +187,11 @@ int syscalltbl__id(struct syscalltbl *tbl, const
> char *name)
>           return audit_name_to_syscall(name, tbl->audit_machine);
>   }
>
> +int syscalltbl__id_at_idx(struct syscalltbl *tbl __maybe_unused, int idx)
> +{
> +        return idx;
> +}

This looks somewhat familiar :):
https://lore.kernel.org/all/739001a4-4df1-4dec-a141-926c78c5c07e@xxxxxxxxxx/

I am attaching an updated patch.

thanks,
--
js
suse labs
From 3d4f06d79c949a8f155c20652b4f685540899ad4 Mon Sep 17 00:00:00 2001
From: Jiri Slaby <jslaby@xxxxxxx>
Date: Thu, 10 Oct 2024 09:57:07 +0200
Subject: [PATCH] perf: fix non-listed archs

Suggested-by: Howard Chu <howardchu95@xxxxxxxxx>
Signed-off-by: Jiri Slaby <jslaby@xxxxxxx>
---
 tools/perf/util/syscalltbl.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tools/perf/util/syscalltbl.c b/tools/perf/util/syscalltbl.c
index 7c15dec6900d..6c45ded922b6 100644
--- a/tools/perf/util/syscalltbl.c
+++ b/tools/perf/util/syscalltbl.c
@@ -46,6 +46,11 @@ static const char *const *syscalltbl_native = syscalltbl_mips_n64;
 #include <asm/syscalls.c>
 const int syscalltbl_native_max_id = SYSCALLTBL_LOONGARCH_MAX_ID;
 static const char *const *syscalltbl_native = syscalltbl_loongarch;
+#else
+const int syscalltbl_native_max_id = 0;
+static const char *const syscalltbl_native[] = {
+	[0] = "unknown",
+};
 #endif
 
 struct syscall {
@@ -182,6 +187,11 @@ int syscalltbl__id(struct syscalltbl *tbl, const char *name)
 	return audit_name_to_syscall(name, tbl->audit_machine);
 }
 
+int syscalltbl__id_at_idx(struct syscalltbl *tbl __maybe_unused, int idx)
+{
+	return idx;
+}
+
 int syscalltbl__strglobmatch_next(struct syscalltbl *tbl __maybe_unused,
 				  const char *syscall_glob __maybe_unused, int *idx __maybe_unused)
 {
-- 
2.46.1