Hi Arnaldo,
On Tue, 29 Jul 2014 09:33:05 -0300, Arnaldo Carvalho de Melo wrote:
> Em Tue, Jul 29, 2014 at 02:02:46PM +0900, Minchan Kim escreveu:
>> On Fri, Jul 25, 2014 at 10:31:47AM +0900, Namhyung Kim wrote:
>> > Minchan reported that perf failed to load vmlinux if --symfs argument
>> > doesn't end with '/' character. So make sure that the symfs always
>> > ends with the '/'.
>> >
>> > Reported-by: Minchan Kim <minc...@kernel.org>
>> > Signed-off-by: Namhyung Kim <namhy...@kernel.org>
>>
>> Both patches work and are handy to me.
>> Thanks Namhyung.
>
> I haven't said it is not :-) Just that it should be fixed in a different
> way.
I also thought about that way first but changed my mind to the current
approach because I don't want to change current behavior.
I worried about the common case which has empty symfs. By your patch,
it makes a pathname absolute even with an empty symfs - I can see most
filenames are already absolute paths but I'm not 100% sure it's always
the case.
Thanks,
Namhyung
>
> Can you please try the patch below instead?
>
> David, was there any reason not to do it like done in this patch?
>
> - Arnaldo
>
> ---
> annotate.c | 4 ++--
> dso.c | 8 ++++----
> symbol.c | 2 +-
> 3 files changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
> index 809b4c50beae..e67ef4a2b356 100644
> --- a/tools/perf/util/annotate.c
> +++ b/tools/perf/util/annotate.c
> @@ -900,7 +900,7 @@ int symbol__annotate(struct symbol *sym, struct map *map,
> size_t privsize)
> bool delete_extract = false;
>
> if (filename) {
> - snprintf(symfs_filename, sizeof(symfs_filename), "%s%s",
> + snprintf(symfs_filename, sizeof(symfs_filename), "%s/%s",
> symbol_conf.symfs, filename);
> }
>
> @@ -922,7 +922,7 @@ fallback:
> * DSO is the same as when 'perf record' ran.
> */
> filename = (char *)dso->long_name;
> - snprintf(symfs_filename, sizeof(symfs_filename), "%s%s",
> + snprintf(symfs_filename, sizeof(symfs_filename), "%s/%s",
> symbol_conf.symfs, filename);
> free_filename = false;
> }
> diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c
> index 90d02c661dd4..f81550583429 100644
> --- a/tools/perf/util/dso.c
> +++ b/tools/perf/util/dso.c
> @@ -79,7 +79,7 @@ int dso__read_binary_type_filename(const struct dso *dso,
> while (last_slash != dso->long_name && *last_slash != '/')
> last_slash--;
>
> - len = scnprintf(filename, size, "%s", symbol_conf.symfs);
> + len = scnprintf(filename, size, "%s/", symbol_conf.symfs);
> dir_size = last_slash - dso->long_name + 2;
> if (dir_size > (size - len)) {
> ret = -1;
> @@ -108,17 +108,17 @@ int dso__read_binary_type_filename(const struct dso
> *dso,
> case DSO_BINARY_TYPE__VMLINUX:
> case DSO_BINARY_TYPE__GUEST_VMLINUX:
> case DSO_BINARY_TYPE__SYSTEM_PATH_DSO:
> - snprintf(filename, size, "%s%s",
> + snprintf(filename, size, "%s/%s",
> symbol_conf.symfs, dso->long_name);
> break;
>
> case DSO_BINARY_TYPE__GUEST_KMODULE:
> - snprintf(filename, size, "%s%s%s", symbol_conf.symfs,
> + snprintf(filename, size, "%s/%s/%s", symbol_conf.symfs,
> root_dir, dso->long_name);
> break;
>
> case DSO_BINARY_TYPE__SYSTEM_PATH_KMODULE:
> - snprintf(filename, size, "%s%s", symbol_conf.symfs,
> + snprintf(filename, size, "%s/%s", symbol_conf.symfs,
> dso->long_name);
> break;
>
> diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
> index eb06746b06b2..c3549d5955ea 100644
> --- a/tools/perf/util/symbol.c
> +++ b/tools/perf/util/symbol.c
> @@ -1468,7 +1468,7 @@ int dso__load_vmlinux(struct dso *dso, struct map *map,
> if (vmlinux[0] == '/')
> snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s", vmlinux);
> else
> - snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s%s",
> + snprintf(symfs_vmlinux, sizeof(symfs_vmlinux), "%s/%s",
> symbol_conf.symfs, vmlinux);
>
> if (dso->kernel == DSO_TYPE_GUEST_KERNEL)
--
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