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perf trace: Introduce 'struct evsel__trace' for evsel->priv needs 

For syscalls we need to cache the 'syscall_id' and 'ret' field offsets
but as well have a pointer to the syscall_fmt_arg array for the fields,
so that we can expand strings in filter expressions, so introduce
a 'struct evsel_trace' to have in evsel->priv that allows for that.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Luis Cláudio Gonçalves <lclaudio@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lkml.kernel.org/n/tip-hx8ukasuws5sz6rsar73cocv@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Arnaldo Carvalho de Melo 2019-10-17 16:37:18 -03:00
parent 8b913df50f
commit 2b00bb627f
1 changed files with 48 additions and 6 deletions
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54
tools/perf/builtin-trace.c
View File

@ -285,21 +285,47 @@ struct syscall_tp {
};
};
/*
* The evsel->priv as used by 'perf trace'
* sc: for raw_syscalls:sys_{enter,exit} and syscalls:sys_{enter,exit}_SYSCALLNAME
* fmt: for all the other tracepoints
*/
struct evsel_trace {
struct syscall_tp sc;
struct syscall_arg_fmt *fmt;
};
static struct evsel_trace *evsel_trace__new(void)
{
return zalloc(sizeof(struct evsel_trace));
}
static void evsel_trace__delete(struct evsel_trace *et)
{
if (et == NULL)
return;
zfree(&et->fmt);
free(et);
}
/*
* Used with raw_syscalls:sys_{enter,exit} and with the
* syscalls:sys_{enter,exit}_SYSCALL tracepoints
*/
static inline struct syscall_tp *__evsel__syscall_tp(struct evsel *evsel)
{
struct syscall_tp *sc = evsel->priv;
struct evsel_trace *et = evsel->priv;
return sc;
return &et->sc;
}
static struct syscall_tp *evsel__syscall_tp(struct evsel *evsel)
{
if (evsel->priv == NULL) {
evsel->priv = zalloc(sizeof(struct syscall_tp));
evsel->priv = evsel_trace__new();
if (evsel->priv == NULL)
return NULL;
}
return __evsel__syscall_tp(evsel);
@ -310,18 +336,34 @@ static struct syscall_tp *evsel__syscall_tp(struct evsel *evsel)
*/
static inline struct syscall_arg_fmt *__evsel__syscall_arg_fmt(struct evsel *evsel)
{
struct syscall_arg_fmt *fmt = evsel->priv;
struct evsel_trace *et = evsel->priv;
return fmt;
return et->fmt;
}
static struct syscall_arg_fmt *evsel__syscall_arg_fmt(struct evsel *evsel)
{
struct evsel_trace *et = evsel->priv;
if (evsel->priv == NULL) {
evsel->priv = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt));
et = evsel->priv = evsel_trace__new();
if (et == NULL)
return NULL;
}
if (et->fmt == NULL) {
et->fmt = calloc(evsel->tp_format->format.nr_fields, sizeof(struct syscall_arg_fmt));
if (et->fmt == NULL)
goto out_delete;
}
return __evsel__syscall_arg_fmt(evsel);
out_delete:
evsel_trace__delete(evsel->priv);
evsel->priv = NULL;
return NULL;
}
static int perf_evsel__init_tp_uint_field(struct evsel *evsel,