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SubjectRe: [PATCH 1/3] perf script: Add missing calls to Py_DECREF for return values
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Hi Joseph,

On Wed, 09 Jul 2014 09:40:29 +0200, Joseph Schuchart wrote:
> [PATCH 1/3] perf script: Add missing calls to Py_DECREF for return values
>
> Signed-off-by: Joseph Schuchart <joseph.schuchart@tu-dresden.de>

Acked-by: Namhyung Kim <namhyung@kernel.org>

Thanks,
Namhyung


> ---
> tools/perf/util/scripting-engines/trace-event-python.c | 12 ++++++++++--
> 1 file changed, 10 insertions(+), 2 deletions(-)
>
> diff --git a/tools/perf/util/scripting-engines/trace-event-python.c b/tools/perf/util/scripting-engines/trace-event-python.c
> index 1c41932..631aa85 100644
> --- a/tools/perf/util/scripting-engines/trace-event-python.c
> +++ b/tools/perf/util/scripting-engines/trace-event-python.c
> @@ -50,10 +50,14 @@ static int zero_flag_atom;
>
> static PyObject *main_module, *main_dict;
>
> +static void handler_call_die(const char *handler_name) NORETURN;
> static void handler_call_die(const char *handler_name)
> {
> PyErr_Print();
> Py_FatalError("problem in Python trace event handler");
> + // Py_FatalError does not return
> + // but we have to make the compiler happy
> + abort();
> }
>
> /*
> @@ -97,6 +101,7 @@ static void define_value(enum print_arg_type field_type,
> retval = PyObject_CallObject(handler, t);
> if (retval == NULL)
> handler_call_die(handler_name);
> + Py_DECREF(retval);
> }
>
> Py_DECREF(t);
> @@ -143,6 +148,7 @@ static void define_field(enum print_arg_type field_type,
> retval = PyObject_CallObject(handler, t);
> if (retval == NULL)
> handler_call_die(handler_name);
> + Py_DECREF(retval);
> }
>
> Py_DECREF(t);
> @@ -334,6 +340,7 @@ static void python_process_tracepoint(struct perf_sample *sample,
> retval = PyObject_CallObject(handler, t);
> if (retval == NULL)
> handler_call_die(handler_name);
> + Py_DECREF(retval);
> } else {
> handler = PyDict_GetItemString(main_dict, "trace_unhandled");
> if (handler && PyCallable_Check(handler)) {
> @@ -341,6 +348,7 @@ static void python_process_tracepoint(struct perf_sample *sample,
> retval = PyObject_CallObject(handler, t);
> if (retval == NULL)
> handler_call_die("trace_unhandled");
> + Py_DECREF(retval);
> }
> Py_DECREF(dict);
> }
> @@ -400,6 +408,7 @@ static void python_process_general_event(struct perf_sample *sample,
> retval = PyObject_CallObject(handler, t);
> if (retval == NULL)
> handler_call_die(handler_name);
> + Py_DECREF(retval);
> exit:
> Py_DECREF(dict);
> Py_DECREF(t);
> @@ -521,8 +530,7 @@ static int python_stop_script(void)
> retval = PyObject_CallObject(handler, NULL);
> if (retval == NULL)
> handler_call_die("trace_end");
> - else
> - Py_DECREF(retval);
> + Py_DECREF(retval);
> out:
> Py_XDECREF(main_dict);
> Py_XDECREF(main_module);


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