perf trace: Allow overiding the formatting of syscall fields

The mmap syscalls, for instance, don't have the FORMAT_IS_POINTER for
its pointer arguments, override it.

This also paves the way for more specialized argument beautifiers, like
for mmap's prot and flags arguments.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/n/tip-mm864hvhrpt39muxmmbtjasz@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 16 insertions, 3 deletions

diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 2d759f57f9d4..60ee811c5129 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -17,24 +17,35 @@ static size_t syscall_arg__scnprintf_hex(char *bf, size_t size, unsigned long ar
         return scnprintf(bf, size, "%#lx", arg);
 }
 
+#define SCA_HEX syscall_arg__scnprintf_hex
+
 static struct syscall_fmt {
         const char *name;
         const char *alias;
+        size_t     (*arg_scnprintf[6])(char *bf, size_t size, unsigned long arg);
         bool       errmsg;
         bool       timeout;
         bool       hexret;
 } syscall_fmts[] = {
         { .name     = "access",     .errmsg = true, },
         { .name     = "arch_prctl", .errmsg = true, .alias = "prctl", },
-        { .name     = "brk",        .hexret = true, },
+        { .name     = "brk",        .hexret = true,
+          .arg_scnprintf = { [0] = SCA_HEX, /* brk */ }, },
         { .name     = "mmap",       .hexret = true, },
         { .name     = "connect",    .errmsg = true, },
         { .name     = "fstat",      .errmsg = true, .alias = "newfstat", },
         { .name     = "fstatat",    .errmsg = true, .alias = "newfstatat", },
         { .name     = "futex",      .errmsg = true, },
+        { .name     = "ioctl",      .errmsg = true,
+          .arg_scnprintf = { [2] = SCA_HEX, /* arg */ }, },
         { .name     = "lstat",      .errmsg = true, .alias = "newlstat", },
-        { .name     = "mmap",       .hexret = true, },
+        { .name     = "mmap",       .hexret = true,
+          .arg_scnprintf = { [0] = SCA_HEX, /* addr */ }, },
+        { .name     = "mprotect",   .errmsg = true,
+          .arg_scnprintf = { [0] = SCA_HEX, /* addr */ }, },
         { .name     = "mremap",     .hexret = true, },
+        { .name     = "munmap",     .errmsg = true,
+          .arg_scnprintf = { [0] = SCA_HEX, /* addr */ }, },
         { .name     = "open",       .errmsg = true, },
         { .name     = "poll",       .errmsg = true, .timeout = true, },
         { .name     = "ppoll",      .errmsg = true, .timeout = true, },
@@ -232,7 +243,9 @@ static int syscall__set_arg_fmts(struct syscall *sc)
                 return -1;
 
         for (field = sc->tp_format->format.fields->next; field; field = field->next) {
-                if (field->flags & FIELD_IS_POINTER)
+                if (sc->fmt && sc->fmt->arg_scnprintf[idx])
+                        sc->arg_scnprintf[idx] = sc->fmt->arg_scnprintf[idx];
+                else if (field->flags & FIELD_IS_POINTER)
                         sc->arg_scnprintf[idx] = syscall_arg__scnprintf_hex;
                 ++idx;
         }