This can be used to get config values like which objdump Perf uses for disassembly.
Reviewed-by: Leo Yan leo.yan@arm.com Signed-off-by: James Clark james.clark@linaro.org --- .../perf/Documentation/perf-script-python.txt | 2 +- .../scripts/python/Perf-Trace-Util/Context.c | 11 ++++++++++ tools/perf/util/config.c | 22 +++++++++++++++++++ tools/perf/util/config.h | 1 + 4 files changed, 35 insertions(+), 1 deletion(-)
diff --git a/tools/perf/Documentation/perf-script-python.txt b/tools/perf/Documentation/perf-script-python.txt index 13e37e9385ee..27a1cac6fe76 100644 --- a/tools/perf/Documentation/perf-script-python.txt +++ b/tools/perf/Documentation/perf-script-python.txt @@ -624,7 +624,7 @@ as perf_trace_context.perf_script_context . perf_set_itrace_options(context, itrace_options) - set --itrace options if they have not been set already perf_sample_srcline(context) - returns source_file_name, line_number perf_sample_srccode(context) - returns source_file_name, line_number, source_line - + perf_config_get(config_name) - returns the value of the named config item, or None if unset
Util.py Module ~~~~~~~~~~~~~~ diff --git a/tools/perf/scripts/python/Perf-Trace-Util/Context.c b/tools/perf/scripts/python/Perf-Trace-Util/Context.c index 3954bd1587ce..01f54d6724a5 100644 --- a/tools/perf/scripts/python/Perf-Trace-Util/Context.c +++ b/tools/perf/scripts/python/Perf-Trace-Util/Context.c @@ -12,6 +12,7 @@ #define PY_SSIZE_T_CLEAN
#include <Python.h> +#include "../../../util/config.h" #include "../../../util/trace-event.h" #include "../../../util/event.h" #include "../../../util/symbol.h" @@ -182,6 +183,15 @@ static PyObject *perf_sample_srccode(PyObject *obj, PyObject *args) return perf_sample_src(obj, args, true); }
+static PyObject *__perf_config_get(PyObject *obj, PyObject *args) +{ + const char *config_name; + + if (!PyArg_ParseTuple(args, "s", &config_name)) + return NULL; + return Py_BuildValue("s", perf_config_get(config_name)); +} + static PyMethodDef ContextMethods[] = { #ifdef HAVE_LIBTRACEEVENT { "common_pc", perf_trace_context_common_pc, METH_VARARGS, @@ -199,6 +209,7 @@ static PyMethodDef ContextMethods[] = { METH_VARARGS, "Get source file name and line number."}, { "perf_sample_srccode", perf_sample_srccode, METH_VARARGS, "Get source file name, line number and line."}, + { "perf_config_get", __perf_config_get, METH_VARARGS, "Get perf config entry"}, { NULL, NULL, 0, NULL} };
diff --git a/tools/perf/util/config.c b/tools/perf/util/config.c index 7a650de0db83..68f9407ca74b 100644 --- a/tools/perf/util/config.c +++ b/tools/perf/util/config.c @@ -912,6 +912,7 @@ void set_buildid_dir(const char *dir) struct perf_config_scan_data { const char *name; const char *fmt; + const char *value; va_list args; int ret; }; @@ -939,3 +940,24 @@ int perf_config_scan(const char *name, const char *fmt, ...)
return d.ret; } + +static int perf_config_get_cb(const char *var, const char *value, void *data) +{ + struct perf_config_scan_data *d = data; + + if (!strcmp(var, d->name)) + d->value = value; + + return 0; +} + +const char *perf_config_get(const char *name) +{ + struct perf_config_scan_data d = { + .name = name, + .value = NULL, + }; + + perf_config(perf_config_get_cb, &d); + return d.value; +} diff --git a/tools/perf/util/config.h b/tools/perf/util/config.h index 2e5e808928a5..9971313d61c1 100644 --- a/tools/perf/util/config.h +++ b/tools/perf/util/config.h @@ -30,6 +30,7 @@ typedef int (*config_fn_t)(const char *, const char *, void *); int perf_default_config(const char *, const char *, void *); int perf_config(config_fn_t fn, void *); int perf_config_scan(const char *name, const char *fmt, ...) __scanf(2, 3); +const char *perf_config_get(const char *name); int perf_config_set(struct perf_config_set *set, config_fn_t fn, void *data); int perf_config_int(int *dest, const char *, const char *);