Commit 39878d49 authored Mar 30, 2016 by Arnaldo Carvalho de Melo

perf trace: Pretty print getrandom() args

# trace -e getrandom
35622.560 ( 0.023 ms): systemd-udevd/631 getrandom(buf: 0x55621e3c18f0, count: 16, flags: NONBLOCK) = 16
35622.585 ( 0.006 ms): systemd-udevd/631 getrandom(buf: 0x55621e3c18f0, count: 16, flags: NONBLOCK) = 16
35622.594 ( 0.004 ms): systemd-udevd/631 getrandom(buf: 0x55621e3c18f0, count: 16, flags: NONBLOCK) = 16
35627.395 ( 0.010 ms): libvirtd/1353 getrandom(buf: 0x7f7a1bfa35c0, count: 16, flags: NONBLOCK ) = 16
35630.940 ( 0.013 ms): fwupd/16120 getrandom(buf: 0x7f63243aa5c0, count: 16, flags: NONBLOCK ) = 16
35718.613 ( 0.015 ms): systemd-udevd/631 getrandom(buf: 0x55621e3c18f0, count: 16, flags: NONBLOCK) = 16
35718.629 ( 0.005 ms): systemd-udevd/631 getrandom(buf: 0x55621e3c18f0, count: 16, flags: NONBLOCK) = 16
35718.637 ( 0.004 ms): systemd-udevd/631 getrandom(buf: 0x55621e3c18f0, count: 16, flags: NONBLOCK) = 16
35719.355 ( 0.010 ms): libvirtd/1353 getrandom(buf: 0x7f7a1bfa35c0, count: 16, flags: NONBLOCK ) = 16
35721.042 ( 0.030 ms): fwupd/16120 getrandom(buf: 0x7f63243aa5c0, count: 16, flags: NONBLOCK ) = 16
41090.830 ( 0.012 ms): systemd-udevd/631 getrandom(buf: 0x55621e3c18f0, count: 16, flags: NONBLOCK) = 16
41090.845 ( 0.004 ms): systemd-udevd/631 getrandom(buf: 0x55621e3c18f0, count: 16, flags: NONBLOCK) = 16
41090.851 ( 0.004 ms): systemd-udevd/631 getrandom(buf: 0x55621e3c18f0, count: 16, flags: NONBLOCK) = 16
41091.750 ( 0.010 ms): libvirtd/1353 getrandom(buf: 0x7f7a1bfa35c0, count: 16, flags: NONBLOCK ) = 16
41091.823 ( 0.006 ms): fwupd/16120 getrandom(buf: 0x7f63243aa5c0, count: 16, flags: NONBLOCK ) = 16
41122.078 ( 0.053 ms): systemd-udevd/631 getrandom(buf: 0x55621e3c18f0, count: 16, flags: NONBLOCK) = 16
41122.129 ( 0.009 ms): systemd-udevd/631 getrandom(buf: 0x55621e3c18f0, count: 16, flags: NONBLOCK) = 16
41122.139 ( 0.004 ms): systemd-udevd/631 getrandom(buf: 0x55621e3c18f0, count: 16, flags: NONBLOCK) = 16
41124.492 ( 0.007 ms): libvirtd/1353 getrandom(buf: 0x7f7a1bfa35c0, count: 16, flags: NONBLOCK ) = 16
41124.470 ( 0.013 ms): fwupd/16120 getrandom(buf: 0x7f63243aa5c0, count: 16, flags: NONBLOCK ) = 16
41590.832 ( 0.014 ms): chrome/5957 getrandom(buf: 0x7fabac7b15b0, count: 16, flags: NONBLOCK ) = 16
41590.884 ( 0.004 ms): chrome/5957 getrandom(buf: 0x7fabac7b15c0, count: 16, flags: NONBLOCK ) = 16

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-gca0n1p3aca3depey703ph2q@git.kernel.org

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

parent 997bba8c

tools/perf/builtin-trace.c

+26 −0

Original line number	Diff line number	Diff line
		@@ -44,6 +44,7 @@
		#include <linux/filter.h>
		#include <linux/audit.h>
		#include <sys/ptrace.h>
		#include <linux/random.h>

		/* For older distros: */
		#ifndef MAP_STACK
		@@ -1045,6 +1046,29 @@ static size_t syscall_arg__scnprintf_seccomp_flags(char *bf, size_t size,

		#define SCA_SECCOMP_FLAGS syscall_arg__scnprintf_seccomp_flags

		static size_t syscall_arg__scnprintf_getrandom_flags(char *bf, size_t size,
		struct syscall_arg *arg)
		{
		int printed = 0, flags = arg->val;

		#define P_FLAG(n) \
		if (flags & GRND_##n) { \
		printed += scnprintf(bf + printed, size - printed, "%s%s", printed ? "\|" : "", #n); \
		flags &= ~GRND_##n; \
		}

		P_FLAG(RANDOM);
		P_FLAG(NONBLOCK);
		#undef P_FLAG

		if (flags)
		printed += scnprintf(bf + printed, size - printed, "%s%#x", printed ? "\|" : "", flags);

		return printed;
		}

		#define SCA_GETRANDOM_FLAGS syscall_arg__scnprintf_getrandom_flags

		#define STRARRAY(arg, name, array) \
		.arg_scnprintf = { [arg] = SCA_STRARRAY, }, \
		.arg_parm = { [arg] = &strarray__##array, }
		@@ -1137,6 +1161,8 @@ static struct syscall_fmt {
		{ .name = "getdents64", .errmsg = true,
		.arg_scnprintf = { [0] = SCA_FD, /* fd */ }, },
		{ .name = "getitimer", .errmsg = true, STRARRAY(0, which, itimers), },
		{ .name = "getrandom", .errmsg = true,
		.arg_scnprintf = { [2] = SCA_GETRANDOM_FLAGS, /* flags */ }, },
		{ .name = "getrlimit", .errmsg = true, STRARRAY(0, resource, rlimit_resources), },
		{ .name = "getxattr", .errmsg = true,
		.arg_scnprintf = { [0] = SCA_FILENAME, /* pathname */ }, },

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