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Date: Mon, 22 Dec 2014 12:52:10 -0200
From: Arnaldo Carvalho de Melo <acme@...hat.com>
To: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
Cc: Jiri Olsa <jolsa@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
linux-kernel@...r.kernel.org, acme@...nel.org
Subject: Re: [PATCH] tools: lib: traceevent: event-parse.c: Remove some
unused functions
Em Sat, Dec 20, 2014 at 01:45:41PM +0100, Rickard Strandqvist escreveu:
> Removes some functions that are not used anywhere:
> pevent_get_any_field_val() pevent_get_common_field_val() pevent_event_fields() pevent_event_common_fields() pevent_list_events() pevent_print_event() pevent_data_event_from_type() pevent_register_trace_clock() pevent_pid_is_registered()
>
> This was partially found by using a static code analysis program called cppcheck.
Steven, Namhyung, Jiri:
Are you ok with me applying this patch? I'm all for it, dead code better
be removed, but I don't know what are your plans wrt synchronization
with the trace-cmd repo.
- Arnaldo
> Signed-off-by: Rickard Strandqvist <rickard_strandqvist@...ctrumdigital.se>
> ---
> tools/lib/traceevent/event-parse.c | 240 ------------------------------------
> tools/lib/traceevent/event-parse.h | 16 ---
> 2 files changed, 256 deletions(-)
>
> diff --git a/tools/lib/traceevent/event-parse.c b/tools/lib/traceevent/event-parse.c
> index cf3a44b..4287771 100644
> --- a/tools/lib/traceevent/event-parse.c
> +++ b/tools/lib/traceevent/event-parse.c
> @@ -206,35 +206,6 @@ static const char *find_cmdline(struct pevent *pevent, int pid)
> return "<...>";
> }
>
> -/**
> - * pevent_pid_is_registered - return if a pid has a cmdline registered
> - * @pevent: handle for the pevent
> - * @pid: The pid to check if it has a cmdline registered with.
> - *
> - * Returns 1 if the pid has a cmdline mapped to it
> - * 0 otherwise.
> - */
> -int pevent_pid_is_registered(struct pevent *pevent, int pid)
> -{
> - const struct cmdline *comm;
> - struct cmdline key;
> -
> - if (!pid)
> - return 1;
> -
> - if (!pevent->cmdlines && cmdline_init(pevent))
> - return 0;
> -
> - key.pid = pid;
> -
> - comm = bsearch(&key, pevent->cmdlines, pevent->cmdline_count,
> - sizeof(*pevent->cmdlines), cmdline_cmp);
> -
> - if (comm)
> - return 1;
> - return 0;
> -}
> -
> /*
> * If the command lines have been converted to an array, then
> * we must add this pid. This is much slower than when cmdlines
> @@ -317,11 +288,6 @@ int pevent_register_comm(struct pevent *pevent, const char *comm, int pid)
> return 0;
> }
>
> -void pevent_register_trace_clock(struct pevent *pevent, char *trace_clock)
> -{
> - pevent->trace_clock = trace_clock;
> -}
> -
> struct func_map {
> unsigned long long addr;
> char *func;
> @@ -4572,18 +4538,6 @@ int pevent_data_type(struct pevent *pevent, struct pevent_record *rec)
> }
>
> /**
> - * pevent_data_event_from_type - find the event by a given type
> - * @pevent: a handle to the pevent
> - * @type: the type of the event.
> - *
> - * This returns the event form a given @type;
> - */
> -struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type)
> -{
> - return pevent_find_event(pevent, type);
> -}
> -
> -/**
> * pevent_data_pid - parse the PID from raw data
> * @pevent: a handle to the pevent
> * @rec: the record to parse
> @@ -4653,75 +4607,6 @@ static bool is_timestamp_in_us(char *trace_clock, bool use_trace_clock)
> return false;
> }
>
> -void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
> - struct pevent_record *record, bool use_trace_clock)
> -{
> - static const char *spaces = " "; /* 20 spaces */
> - struct event_format *event;
> - unsigned long secs;
> - unsigned long usecs;
> - unsigned long nsecs;
> - const char *comm;
> - void *data = record->data;
> - int type;
> - int pid;
> - int len;
> - int p;
> - bool use_usec_format;
> -
> - use_usec_format = is_timestamp_in_us(pevent->trace_clock,
> - use_trace_clock);
> - if (use_usec_format) {
> - secs = record->ts / NSECS_PER_SEC;
> - nsecs = record->ts - secs * NSECS_PER_SEC;
> - }
> -
> - if (record->size < 0) {
> - do_warning("ug! negative record size %d", record->size);
> - return;
> - }
> -
> - type = trace_parse_common_type(pevent, data);
> -
> - event = pevent_find_event(pevent, type);
> - if (!event) {
> - do_warning("ug! no event found for type %d", type);
> - return;
> - }
> -
> - pid = parse_common_pid(pevent, data);
> - comm = find_cmdline(pevent, pid);
> -
> - if (pevent->latency_format) {
> - trace_seq_printf(s, "%8.8s-%-5d %3d",
> - comm, pid, record->cpu);
> - pevent_data_lat_fmt(pevent, s, record);
> - } else
> - trace_seq_printf(s, "%16s-%-5d [%03d]", comm, pid, record->cpu);
> -
> - if (use_usec_format) {
> - if (pevent->flags & PEVENT_NSEC_OUTPUT) {
> - usecs = nsecs;
> - p = 9;
> - } else {
> - usecs = (nsecs + 500) / NSECS_PER_USEC;
> - p = 6;
> - }
> -
> - trace_seq_printf(s, " %5lu.%0*lu: %s: ",
> - secs, p, usecs, event->name);
> - } else
> - trace_seq_printf(s, " %12llu: %s: ",
> - record->ts, event->name);
> -
> - /* Space out the event names evenly. */
> - len = strlen(event->name);
> - if (len < 20)
> - trace_seq_printf(s, "%.*s", 20 - len, spaces);
> -
> - pevent_event_info(s, event, record);
> -}
> -
> static int events_id_cmp(const void *a, const void *b)
> {
> struct event_format * const * ea = a;
> @@ -4770,53 +4655,6 @@ static int events_system_cmp(const void *a, const void *b)
> return events_id_cmp(a, b);
> }
>
> -struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type sort_type)
> -{
> - struct event_format **events;
> - int (*sort)(const void *a, const void *b);
> -
> - events = pevent->sort_events;
> -
> - if (events && pevent->last_type == sort_type)
> - return events;
> -
> - if (!events) {
> - events = malloc(sizeof(*events) * (pevent->nr_events + 1));
> - if (!events)
> - return NULL;
> -
> - memcpy(events, pevent->events, sizeof(*events) * pevent->nr_events);
> - events[pevent->nr_events] = NULL;
> -
> - pevent->sort_events = events;
> -
> - /* the internal events are sorted by id */
> - if (sort_type == EVENT_SORT_ID) {
> - pevent->last_type = sort_type;
> - return events;
> - }
> - }
> -
> - switch (sort_type) {
> - case EVENT_SORT_ID:
> - sort = events_id_cmp;
> - break;
> - case EVENT_SORT_NAME:
> - sort = events_name_cmp;
> - break;
> - case EVENT_SORT_SYSTEM:
> - sort = events_system_cmp;
> - break;
> - default:
> - return events;
> - }
> -
> - qsort(events, pevent->nr_events, sizeof(*events), sort);
> - pevent->last_type = sort_type;
> -
> - return events;
> -}
> -
> static struct format_field **
> get_event_fields(const char *type, const char *name,
> int count, struct format_field *list)
> @@ -4848,34 +4686,6 @@ get_event_fields(const char *type, const char *name,
> return fields;
> }
>
> -/**
> - * pevent_event_common_fields - return a list of common fields for an event
> - * @event: the event to return the common fields of.
> - *
> - * Returns an allocated array of fields. The last item in the array is NULL.
> - * The array must be freed with free().
> - */
> -struct format_field **pevent_event_common_fields(struct event_format *event)
> -{
> - return get_event_fields("common", event->name,
> - event->format.nr_common,
> - event->format.common_fields);
> -}
> -
> -/**
> - * pevent_event_fields - return a list of event specific fields for an event
> - * @event: the event to return the fields of.
> - *
> - * Returns an allocated array of fields. The last item in the array is NULL.
> - * The array must be freed with free().
> - */
> -struct format_field **pevent_event_fields(struct event_format *event)
> -{
> - return get_event_fields("event", event->name,
> - event->format.nr_fields,
> - event->format.fields);
> -}
> -
> static void print_fields(struct trace_seq *s, struct print_flag_sym *field)
> {
> trace_seq_printf(s, "{ %s, %s }", field->value, field->str);
> @@ -5467,56 +5277,6 @@ int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
> }
>
> /**
> - * pevent_get_common_field_val - find a common field and return its value
> - * @s: The seq to print to on error
> - * @event: the event that the field is for
> - * @name: The name of the field
> - * @record: The record with the field name.
> - * @val: place to store the value of the field.
> - * @err: print default error if failed.
> - *
> - * Returns 0 on success -1 on field not found.
> - */
> -int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
> - const char *name, struct pevent_record *record,
> - unsigned long long *val, int err)
> -{
> - struct format_field *field;
> -
> - if (!event)
> - return -1;
> -
> - field = pevent_find_common_field(event, name);
> -
> - return get_field_val(s, field, name, record, val, err);
> -}
> -
> -/**
> - * pevent_get_any_field_val - find a any field and return its value
> - * @s: The seq to print to on error
> - * @event: the event that the field is for
> - * @name: The name of the field
> - * @record: The record with the field name.
> - * @val: place to store the value of the field.
> - * @err: print default error if failed.
> - *
> - * Returns 0 on success -1 on field not found.
> - */
> -int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
> - const char *name, struct pevent_record *record,
> - unsigned long long *val, int err)
> -{
> - struct format_field *field;
> -
> - if (!event)
> - return -1;
> -
> - field = pevent_find_any_field(event, name);
> -
> - return get_field_val(s, field, name, record, val, err);
> -}
> -
> -/**
> * pevent_print_num_field - print a field and a format
> * @s: The seq to print to
> * @fmt: The printf format to print the field with.
> diff --git a/tools/lib/traceevent/event-parse.h b/tools/lib/traceevent/event-parse.h
> index 7a3873f..8e50f9d 100644
> --- a/tools/lib/traceevent/event-parse.h
> +++ b/tools/lib/traceevent/event-parse.h
> @@ -597,15 +597,10 @@ enum trace_flag_type {
> };
>
> int pevent_register_comm(struct pevent *pevent, const char *comm, int pid);
> -void pevent_register_trace_clock(struct pevent *pevent, char *trace_clock);
> int pevent_register_function(struct pevent *pevent, char *name,
> unsigned long long addr, char *mod);
> int pevent_register_print_string(struct pevent *pevent, const char *fmt,
> unsigned long long addr);
> -int pevent_pid_is_registered(struct pevent *pevent, int pid);
> -
> -void pevent_print_event(struct pevent *pevent, struct trace_seq *s,
> - struct pevent_record *record, bool use_trace_clock);
>
> int pevent_parse_header_page(struct pevent *pevent, char *buf, unsigned long size,
> int long_size);
> @@ -625,12 +620,6 @@ void *pevent_get_field_raw(struct trace_seq *s, struct event_format *event,
> int pevent_get_field_val(struct trace_seq *s, struct event_format *event,
> const char *name, struct pevent_record *record,
> unsigned long long *val, int err);
> -int pevent_get_common_field_val(struct trace_seq *s, struct event_format *event,
> - const char *name, struct pevent_record *record,
> - unsigned long long *val, int err);
> -int pevent_get_any_field_val(struct trace_seq *s, struct event_format *event,
> - const char *name, struct pevent_record *record,
> - unsigned long long *val, int err);
>
> int pevent_print_num_field(struct trace_seq *s, const char *fmt,
> struct event_format *event, const char *name,
> @@ -672,7 +661,6 @@ pevent_find_event_by_name(struct pevent *pevent, const char *sys, const char *na
> void pevent_data_lat_fmt(struct pevent *pevent,
> struct trace_seq *s, struct pevent_record *record);
> int pevent_data_type(struct pevent *pevent, struct pevent_record *rec);
> -struct event_format *pevent_data_event_from_type(struct pevent *pevent, int type);
> int pevent_data_pid(struct pevent *pevent, struct pevent_record *rec);
> const char *pevent_data_comm_from_pid(struct pevent *pevent, int pid);
> void pevent_event_info(struct trace_seq *s, struct event_format *event,
> @@ -680,10 +668,6 @@ void pevent_event_info(struct trace_seq *s, struct event_format *event,
> int pevent_strerror(struct pevent *pevent, enum pevent_errno errnum,
> char *buf, size_t buflen);
>
> -struct event_format **pevent_list_events(struct pevent *pevent, enum event_sort_type);
> -struct format_field **pevent_event_common_fields(struct event_format *event);
> -struct format_field **pevent_event_fields(struct event_format *event);
> -
> static inline int pevent_get_cpus(struct pevent *pevent)
> {
> return pevent->cpus;
> --
> 1.7.10.4
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