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authorArnaldo Carvalho de Melo <acme@redhat.com>2017-07-14 10:13:56 -0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2017-07-18 23:13:53 -0300
commitf9f83b3344f9ed6e1d33a87810f38eca5ed6a14f (patch)
tree5ccb793eff5d37f3da1e0cf875a14f6c0974da3d /tools/perf/trace/beauty/beauty.h
parent9cb7cf86440229fd6e6ad1718712742c344653d8 (diff)
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perf trace beauty: Allow accessing syscall args values in a syscall arg formatter
For instance, fcntl's upcoming 'arg' formatter needs to look at the 'cmd' value to decide how to format its value, sometimes it is a file flags, sometimes an fd, a pointer to a structure, etc. 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-2tw2jfaqm48dtw8a4addghze@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/trace/beauty/beauty.h')
-rw-r--r--tools/perf/trace/beauty/beauty.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/tools/perf/trace/beauty/beauty.h b/tools/perf/trace/beauty/beauty.h
index ce01079d8422..6fbac0c8120d 100644
--- a/tools/perf/trace/beauty/beauty.h
+++ b/tools/perf/trace/beauty/beauty.h
@@ -6,8 +6,19 @@
struct trace;
struct thread;
+/**
+ * @val: value of syscall argument being formatted
+ * @args: All the args, use syscall_args__val(arg, nth) to access one
+ * @thread: tid state (maps, pid, tid, etc)
+ * @trace: 'perf trace' internals: all threads, etc
+ * @parm: private area, may be an strarray, for instance
+ * @idx: syscall arg idx (is this the first?)
+ * @mask: a syscall arg may mask another arg, see syscall_arg__scnprintf_futex_op
+ */
+
struct syscall_arg {
unsigned long val;
+ unsigned char *args;
struct thread *thread;
struct trace *trace;
void *parm;
@@ -15,6 +26,8 @@ struct syscall_arg {
u8 mask;
};
+unsigned long syscall_arg__val(struct syscall_arg *arg, u8 idx);
+
size_t syscall_arg__scnprintf_strarrays(char *bf, size_t size, struct syscall_arg *arg);
#define SCA_STRARRAYS syscall_arg__scnprintf_strarrays