Commit 997bba8c authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

perf trace: Pretty print seccomp() args 

E.g:

  # trace -e seccomp
   200.061 (0.009 ms): :2441/2441 seccomp(op: FILTER, flags: TSYNC                       ) = -1 EFAULT Bad address
   200.910 (0.121 ms): :2441/2441 seccomp(op: FILTER, flags: TSYNC, uargs: 0x7fff57479fe0) = 0

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-t369uckshlwp4evkks4bcoo7@git.kernel.org


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 3ed5ca2e

tools/perf/builtin-trace.c

+47 −0
Original line number Diff line number Diff line
@@ -40,6 +40,10 @@ 
#include <sys/mman.h>

#include <linux/futex.h>

#include <linux/err.h>

#include <linux/seccomp.h>

#include <linux/filter.h>

#include <linux/audit.h>

#include <sys/ptrace.h>



/* For older distros: */

#ifndef MAP_STACK
@@ -1001,6 +1005,46 @@ static const char *tioctls[] = { 
static DEFINE_STRARRAY_OFFSET(tioctls, 0x5401);

#endif /* defined(__i386__) || defined(__x86_64__) */



static size_t syscall_arg__scnprintf_seccomp_op(char *bf, size_t size, struct syscall_arg *arg)

{

	int op = arg->val;

	size_t printed = 0;



	switch (op) {

#define	P_SECCOMP_SET_MODE_OP(n) case SECCOMP_SET_MODE_##n: printed = scnprintf(bf, size, #n); break

	P_SECCOMP_SET_MODE_OP(STRICT);

	P_SECCOMP_SET_MODE_OP(FILTER);

#undef P_SECCOMP_SET_MODE_OP

	default: printed = scnprintf(bf, size, "%#x", op);			  break;

	}



	return printed;

}



#define SCA_SECCOMP_OP  syscall_arg__scnprintf_seccomp_op



static size_t syscall_arg__scnprintf_seccomp_flags(char *bf, size_t size,

						   struct syscall_arg *arg)

{

	int printed = 0, flags = arg->val;



#define	P_FLAG(n) \

	if (flags & SECCOMP_FILTER_FLAG_##n) { \

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

		flags &= ~SECCOMP_FILTER_FLAG_##n; \

	}



	P_FLAG(TSYNC);

#undef P_FLAG



	if (flags)

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



	return printed;

}



#define SCA_SECCOMP_FLAGS syscall_arg__scnprintf_seccomp_flags



#define STRARRAY(arg, name, array) \

	  .arg_scnprintf = { [arg] = SCA_STRARRAY, }, \

	  .arg_parm	 = { [arg] = &strarray__##array, }
@@ -1234,6 +1278,9 @@ static struct syscall_fmt { 
	  .arg_scnprintf = { [1] = SCA_SIGNUM, /* sig */ }, },

	{ .name	    = "rt_tgsigqueueinfo", .errmsg = true,

	  .arg_scnprintf = { [2] = SCA_SIGNUM, /* sig */ }, },

	{ .name	    = "seccomp", .errmsg = true,

	  .arg_scnprintf = { [0] = SCA_SECCOMP_OP, /* op */

			     [1] = SCA_SECCOMP_FLAGS, /* flags */ }, },

	{ .name	    = "select",	    .errmsg = true, .timeout = true, },

	{ .name	    = "sendmmsg",    .errmsg = true,

	  .arg_scnprintf = { [0] = SCA_FD, /* fd */

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