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Commit 332337da authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

perf trace: Allow specifying number of syscall args for tracepointless syscalls 

When we don't have syscalls:sys_{enter,exit}_NAME, we had to resort to
dumping all the 6 syscall arguments, fix it by providing that info for
such syscalls, like 'clone'.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-dfq1jtrxj8dqvqoeqqpr3slu@git.kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 325f5091

tools/perf/builtin-trace.c

+5 −1
Original line number Diff line number Diff line
@@ -611,6 +611,7 @@ static struct syscall_fmt { 
	const char *name;

	const char *alias;

	struct syscall_arg_fmt arg[6];

	u8	   nr_args;

	bool	   errpid;

	bool	   timeout;

	bool	   hexret;
@@ -1169,6 +1170,9 @@ static int syscall__alloc_arg_fmts(struct syscall *sc, int nr_args) 
{

	int idx;



	if (nr_args == 6 && sc->fmt && sc->fmt->nr_args != 0)

		nr_args = sc->fmt->nr_args;



	sc->arg_fmt = calloc(nr_args, sizeof(*sc->arg_fmt));

	if (sc->arg_fmt == NULL)

		return -1;
@@ -1413,7 +1417,7 @@ static size_t syscall__scnprintf_args(struct syscall *sc, char *bf, size_t size, 
		 * may end up not having any args, like with gettid(), so only

		 * print the raw args when we didn't manage to read it.

		 */

		while (arg.idx < 6) {

		while (arg.idx < sc->nr_args) {

			if (arg.mask & bit)

				goto next_arg;

			val = syscall_arg__val(&arg, arg.idx);