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tools lib traceevent: Implement new traceevent APIs for accessing struct tep_handler fields

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As struct tep_handler definition is not exposed as part of libtraceevent
API, its fields cannot be accessed directly by the library users. This
patch implements new APIs, which can be used to access the struct
tep_handler fields:

  tep_get_event()        - retrieves an event pointer at a specific index
  tep_get_first_event()  - is modified to use tep_get_event()
  tep_clear_flag()       - clears a tep handle flag
  tep_test_flag()        - test if a given flag is set
  tep_get_header_timestamp_size() - returns the size of the timestamp stored
                           in the header.
  tep_get_cpus()         - returns the number of CPUs
  tep_is_old_format()    - returns true if data was created by an
                           older kernel with the old data format
  tep_set_print_raw()    - have the output print in the raw format
  tep_set_test_filters() - debugging utility for testing tep filters

Signed-off-by: Tzvetomir Stoyanov <tstoyanov@vmware.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: http://lore.kernel.org/linux-trace-devel/20190325145017.30246-4-tstoyanov@vmware.com
Link: http://lkml.kernel.org/r/20190401164343.679629539@goodmis.org
[ Renamed some newly added "pevent" to "tep" ]
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Tzvetomir Stoyanov
2019-04-01 12:43:12 -04:00
committed by Arnaldo Carvalho de Melo
parent d5d2d05bd5
commit 80c5526c85
2 changed files with 108 additions and 4 deletions
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6
tools/lib/traceevent/event-parse.h
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@@ -409,6 +409,8 @@ 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);
void tep_clear_flag(struct tep_handle *tep, enum tep_flag flag);
bool tep_check_flags(struct tep_handle *tep, enum tep_flag flags);
static inline int tep_host_bigendian(void)
{
@@ -568,6 +570,10 @@ void tep_set_host_bigendian(struct tep_handle *pevent, enum tep_endian endian);
int tep_is_latency_format(struct tep_handle *pevent);
void tep_set_latency_format(struct tep_handle *pevent, int lat);
int tep_get_header_page_size(struct tep_handle *pevent);
int tep_get_header_timestamp_size(struct tep_handle *tep);
bool tep_is_old_format(struct tep_handle *tep);
void tep_set_print_raw(struct tep_handle *tep, int print_raw);
void tep_set_test_filters(struct tep_handle *tep, int test_filters);
struct tep_handle *tep_alloc(void);
void tep_free(struct tep_handle *pevent);