Hi Steven :)

On 04/26/2017 08:11 AM, Steven Rostedt wrote:
On Mon, 24 Apr 2017 22:43:31 +0900
Taeung Song <[email protected]> wrote:

Currently the return type of load_plugin() in plugin_python.c is void type,
but it is different from the argument type of trace_util_load_plugins().
So fix it for the below warning.

  /home/taeung/git/opensource/trace-cmd/plugin_python.c: In function 
‘pevent_plugin_loader’:
  /home/taeung/git/opensource/trace-cmd/plugin_python.c:95:41: warning: passing 
argument 3 of ‘trace_util_load_plugins’ from incompatible pointer type 
[-Wincompatible-pointer-types]
    trace_util_load_plugins(pevent, ".py", load_plugin, globals);
                                         ^
  In file included from 
/home/taeung/git/opensource/trace-cmd/plugin_python.c:3:0:
  /home/taeung/git/opensource/trace-cmd/trace-cmd.h:300:5: note: expected ‘int 
(*)(struct pevent *, const char *, const char *, void *)’ but argument is of 
type ‘void (*)(struct pevent *,   const char *, const char *, void *)’
   int trace_util_load_plugins(struct pevent *pevent, const char *suffix,
     ^


Thanks but Federico beat you to it.

 http://lkml.kernel.org/r/[email protected]

I'll be updating and pushing out a new trace-cmd this week.

Signed-off-by: Taeung Song <[email protected]>
---
 plugin_python.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/plugin_python.c b/plugin_python.c
index da07d27..d736f50 100644
--- a/plugin_python.c
+++ b/plugin_python.c
@@ -20,7 +20,7 @@ static const char pyload[] =
 "finally:\n"
 "   file.close()\n";

-static void load_plugin(struct pevent *pevent, const char *path,
+static int load_plugin(struct pevent *pevent, const char *path,
                        const char *name, void *data)
 {
        PyObject *globals = data;
@@ -32,7 +32,7 @@ static void load_plugin(struct pevent *pevent, const char 
*path,
        PyObject *res;

        if (!full || !n)
-               return;
+               return -ENOMEM;

        strcpy(full, path);
        strcat(full, "/");
@@ -43,16 +43,18 @@ static void load_plugin(struct pevent *pevent, const char 
*path,

        asprintf(&load, pyload, full, n);
        if (!load)
-               return;
+               return -1;

        res = PyRun_String(load, Py_file_input, globals, globals);
        if (!res) {
                fprintf(stderr, "failed loading %s\n", full);
                PyErr_Print();
+               return -1;

Although, Federico's version didn't have this. I may add this under
your patch. Although, it requires freeing load. The better way would be
to set a "ret" variable and return that.

Want to send another patch on top of Federico's?


Yes! I want to do it.
After you update 'master' branch on your repo (git.kernel.org/.../trace-cmd.git), I'll send a patch as you said !

And would you mind if I ask you to check another patch I sent ?

  "[PATCH] Fix pevent_filter_clear_trivial()"

But I'll renewedly send the patch after I a bit modified it.
I'd appreciate it if you check the patch, too. :)

Thanks,
Taeung

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