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: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 6485576..0c8bcb9 100644 (file)
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -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 */