[PATCH 33/75] tools lib traceevent: traceevent API cleanup

From: Arnaldo Carvalho de Melo
Date: Thu Dec 06 2018 - 16:28:50 EST

From: Tzvetomir Stoyanov <tstoyanov@xxxxxxxxxx>

In order to make libtraceevent into a proper library, its API should be
straightforward. This patch hides few API functions, intended for
internal usage only:

tep_free_event(), tep_free_format_field(), __tep_data2host2(),
__tep_data2host4() and __tep_data2host8().
The patch also alignes the libtraceevent summary man page with
these API changes.

Signed-off-by: Tzvetomir Stoyanov <tstoyanov@xxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/20181130154647.891651290@xxxxxxxxxxx
Signed-off-by: Steven Rostedt (VMware) <rostedt@xxxxxxxxxxx>
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
tools/lib/traceevent/event-parse-api.c | 6 +++---
tools/lib/traceevent/event-parse-local.h | 7 +++++++
tools/lib/traceevent/event-parse.c | 13 ++++++++-----
tools/lib/traceevent/event-parse.h | 16 ----------------
4 files changed, 18 insertions(+), 24 deletions(-)

diff --git a/tools/lib/traceevent/event-parse-api.c b/tools/lib/traceevent/event-parse-api.c
index 0dc011154ee9..8b31c0e00ba3 100644
--- a/tools/lib/traceevent/event-parse-api.c
+++ b/tools/lib/traceevent/event-parse-api.c
@@ -51,7 +51,7 @@ void tep_set_flag(struct tep_handle *tep, int flag)
tep->flags |= flag;
}

-unsigned short __tep_data2host2(struct tep_handle *pevent, unsigned short data)
+unsigned short tep_data2host2(struct tep_handle *pevent, unsigned short data)
{
unsigned short swap;

@@ -64,7 +64,7 @@ unsigned short __tep_data2host2(struct tep_handle *pevent, unsigned short data)
return swap;
}

-unsigned int __tep_data2host4(struct tep_handle *pevent, unsigned int data)
+unsigned int tep_data2host4(struct tep_handle *pevent, unsigned int data)
{
unsigned int swap;

@@ -80,7 +80,7 @@ unsigned int __tep_data2host4(struct tep_handle *pevent, unsigned int data)
}

unsigned long long
-__tep_data2host8(struct tep_handle *pevent, unsigned long long data)
+tep_data2host8(struct tep_handle *pevent, unsigned long long data)
{
unsigned long long swap;

diff --git a/tools/lib/traceevent/event-parse-local.h b/tools/lib/traceevent/event-parse-local.h
index 94746efef433..9a092dd4a86d 100644
--- a/tools/lib/traceevent/event-parse-local.h
+++ b/tools/lib/traceevent/event-parse-local.h
@@ -89,4 +89,11 @@ struct tep_handle {
char *trace_clock;
};

+void tep_free_event(struct tep_event *event);
+void tep_free_format_field(struct tep_format_field *field);
+
+unsigned short tep_data2host2(struct tep_handle *pevent, unsigned short data);
+unsigned int tep_data2host4(struct tep_handle *pevent, unsigned int data);
+unsigned long long tep_data2host8(struct tep_handle *pevent, unsigned long long data);
+
#endif /* _PARSE_EVENTS_INT_H */
diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
index a3e7d0a75e11..ffa656b868a9 100644
--- a/tools/lib/traceevent/event-parse.c
+++ b/tools/lib/traceevent/event-parse.c
@@ -3328,15 +3328,18 @@ tep_find_any_field(struct tep_event *event, const char *name)
unsigned long long tep_read_number(struct tep_handle *pevent,
const void *ptr, int size)
{
+ unsigned long long val;
+
switch (size) {
case 1:
return *(unsigned char *)ptr;
case 2:
- return tep_data2host2(pevent, ptr);
+ return tep_data2host2(pevent, *(unsigned short *)ptr);
case 4:
- return tep_data2host4(pevent, ptr);
+ return tep_data2host4(pevent, *(unsigned int *)ptr);
case 8:
- return tep_data2host8(pevent, ptr);
+ memcpy(&val, (ptr), sizeof(unsigned long long));
+ return tep_data2host8(pevent, val);
default:
/* BUG! */
return 0;
@@ -4062,7 +4065,7 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
f = tep_find_any_field(event, arg->string.string);
arg->string.offset = f->offset;
}
- str_offset = tep_data2host4(pevent, data + arg->string.offset);
+ str_offset = tep_data2host4(pevent, *(unsigned int *)(data + arg->string.offset));
str_offset &= 0xffff;
print_str_to_seq(s, format, len_arg, ((char *)data) + str_offset);
break;
@@ -4080,7 +4083,7 @@ static void print_str_arg(struct trace_seq *s, void *data, int size,
f = tep_find_any_field(event, arg->bitmask.bitmask);
arg->bitmask.offset = f->offset;
}
- bitmask_offset = tep_data2host4(pevent, data + arg->bitmask.offset);
+ bitmask_offset = tep_data2host4(pevent, *(unsigned int *)(data + arg->bitmask.offset));
bitmask_size = bitmask_offset >> 16;
bitmask_offset &= 0xffff;
print_bitmask_to_seq(pevent, s, format, len_arg,
diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h
index 950ad185a5c4..35d37087d3c5 100644
--- a/tools/lib/traceevent/event-parse.h
+++ b/tools/lib/traceevent/event-parse.h
@@ -409,20 +409,6 @@ void tep_print_plugins(struct trace_seq *s,
typedef char *(tep_func_resolver_t)(void *priv,
unsigned long long *addrp, char **modp);
void tep_set_flag(struct tep_handle *tep, int flag);
-unsigned short __tep_data2host2(struct tep_handle *pevent, unsigned short data);
-unsigned int __tep_data2host4(struct tep_handle *pevent, unsigned int data);
-unsigned long long
-__tep_data2host8(struct tep_handle *pevent, unsigned long long data);
-
-#define tep_data2host2(pevent, ptr) __tep_data2host2(pevent, *(unsigned short *)(ptr))
-#define tep_data2host4(pevent, ptr) __tep_data2host4(pevent, *(unsigned int *)(ptr))
-#define tep_data2host8(pevent, ptr) \
-({ \
- unsigned long long __val; \
- \
- memcpy(&__val, (ptr), sizeof(unsigned long long)); \
- __tep_data2host8(pevent, __val); \
-})

static inline int tep_host_bigendian(void)
{
@@ -475,8 +461,6 @@ enum tep_errno tep_parse_format(struct tep_handle *pevent,
struct tep_event **eventp,
const char *buf,
unsigned long size, const char *sys);
-void tep_free_event(struct tep_event *event);
-void tep_free_format_field(struct tep_format_field *field);

void *tep_get_field_raw(struct trace_seq *s, struct tep_event *event,
const char *name, struct tep_record *record,
--
2.19.2