forked from Minki/linux
38847db974
Libtraceevent APIs for printing various trace events information are complicated, there are complex extra parameters. To control the way event information is printed, the user should call a set of functions in a specific sequence. These APIs are reimplemented to provide a more simple interface for printing event information. Removed APIs: tep_print_event_task() tep_print_event_time() tep_print_event_data() tep_event_info() tep_is_latency_format() tep_set_latency_format() tep_data_latency_format() tep_set_print_raw() A new API for printing event information is introduced: void tep_print_event(struct tep_handle *tep, struct trace_seq *s, struct tep_record *record, const char *fmt, ...); where "fmt" is a printf-like format string, followed by the event fields to be printed. Supported fields: TEP_PRINT_PID, "%d" - event PID TEP_PRINT_CPU, "%d" - event CPU TEP_PRINT_COMM, "%s" - event command string TEP_PRINT_NAME, "%s" - event name TEP_PRINT_LATENCY, "%s" - event latency TEP_PRINT_TIME, %d - event time stamp. A divisor and precision can be specified as part of this format string: "%precision.divisord". Example: "%3.1000d" - divide the time by 1000 and print the first 3 digits before the dot. Thus, the time stamp "123456000" will be printed as "123.456" TEP_PRINT_INFO, "%s" - event information. TEP_PRINT_INFO_RAW, "%s" - event information, in raw format. Example: tep_print_event(tep, s, record, "%16s-%-5d [%03d] %s %6.1000d %s %s", TEP_PRINT_COMM, TEP_PRINT_PID, TEP_PRINT_CPU, TEP_PRINT_LATENCY, TEP_PRINT_TIME, TEP_PRINT_NAME, TEP_PRINT_INFO); Output: ls-11314 [005] d.h. 185207.366383 function __wake_up 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> Cc: linux-trace-devel@vger.kernel.org Cc: Patrick McLean <chutzpah@gentoo.org> Link: http://lore.kernel.org/linux-trace-devel/20190801074959.22023-2-tz.stoyanov@gmail.com Link: http://lore.kernel.org/lkml/20190805204355.041132030@goodmis.org Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
334 lines
7.8 KiB
C
334 lines
7.8 KiB
C
// SPDX-License-Identifier: LGPL-2.1
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/*
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* Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
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*
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*/
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#include "event-parse.h"
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#include "event-parse-local.h"
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#include "event-utils.h"
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/**
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* tep_get_event - returns the event with the given index
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* @tep: a handle to the tep_handle
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* @index: index of the requested event, in the range 0 .. nr_events
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*
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* This returns pointer to the element of the events array with the given index
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* If @tep is NULL, or @index is not in the range 0 .. nr_events, NULL is returned.
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*/
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struct tep_event *tep_get_event(struct tep_handle *tep, int index)
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{
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if (tep && tep->events && index < tep->nr_events)
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return tep->events[index];
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return NULL;
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}
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/**
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* tep_get_first_event - returns the first event in the events array
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* @tep: a handle to the tep_handle
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*
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* This returns pointer to the first element of the events array
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* If @tep is NULL, NULL is returned.
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*/
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struct tep_event *tep_get_first_event(struct tep_handle *tep)
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{
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return tep_get_event(tep, 0);
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}
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/**
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* tep_get_events_count - get the number of defined events
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* @tep: a handle to the tep_handle
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*
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* This returns number of elements in event array
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* If @tep is NULL, 0 is returned.
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*/
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int tep_get_events_count(struct tep_handle *tep)
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{
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if (tep)
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return tep->nr_events;
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return 0;
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}
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/**
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* tep_set_flag - set event parser flag
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* @tep: a handle to the tep_handle
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* @flag: flag, or combination of flags to be set
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* can be any combination from enum tep_flag
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*
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* This sets a flag or combination of flags from enum tep_flag
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*/
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void tep_set_flag(struct tep_handle *tep, int flag)
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{
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if (tep)
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tep->flags |= flag;
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}
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/**
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* tep_clear_flag - clear event parser flag
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* @tep: a handle to the tep_handle
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* @flag: flag to be cleared
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*
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* This clears a tep flag
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*/
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void tep_clear_flag(struct tep_handle *tep, enum tep_flag flag)
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{
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if (tep)
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tep->flags &= ~flag;
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}
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/**
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* tep_test_flag - check the state of event parser flag
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* @tep: a handle to the tep_handle
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* @flag: flag to be checked
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*
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* This returns the state of the requested tep flag.
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* Returns: true if the flag is set, false otherwise.
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*/
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bool tep_test_flag(struct tep_handle *tep, enum tep_flag flag)
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{
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if (tep)
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return tep->flags & flag;
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return false;
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}
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unsigned short tep_data2host2(struct tep_handle *tep, unsigned short data)
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{
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unsigned short swap;
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if (!tep || tep->host_bigendian == tep->file_bigendian)
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return data;
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swap = ((data & 0xffULL) << 8) |
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((data & (0xffULL << 8)) >> 8);
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return swap;
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}
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unsigned int tep_data2host4(struct tep_handle *tep, unsigned int data)
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{
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unsigned int swap;
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if (!tep || tep->host_bigendian == tep->file_bigendian)
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return data;
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swap = ((data & 0xffULL) << 24) |
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((data & (0xffULL << 8)) << 8) |
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((data & (0xffULL << 16)) >> 8) |
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((data & (0xffULL << 24)) >> 24);
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return swap;
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}
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unsigned long long
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tep_data2host8(struct tep_handle *tep, unsigned long long data)
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{
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unsigned long long swap;
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if (!tep || tep->host_bigendian == tep->file_bigendian)
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return data;
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swap = ((data & 0xffULL) << 56) |
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((data & (0xffULL << 8)) << 40) |
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((data & (0xffULL << 16)) << 24) |
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((data & (0xffULL << 24)) << 8) |
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((data & (0xffULL << 32)) >> 8) |
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((data & (0xffULL << 40)) >> 24) |
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((data & (0xffULL << 48)) >> 40) |
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((data & (0xffULL << 56)) >> 56);
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return swap;
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}
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/**
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* tep_get_header_page_size - get size of the header page
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* @tep: a handle to the tep_handle
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*
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* This returns size of the header page
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* If @tep is NULL, 0 is returned.
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*/
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int tep_get_header_page_size(struct tep_handle *tep)
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{
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if (tep)
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return tep->header_page_size_size;
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return 0;
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}
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/**
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* tep_get_header_timestamp_size - get size of the timestamp in the header page
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* @tep: a handle to the tep_handle
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*
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* This returns size of the timestamp in the header page
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* If @tep is NULL, 0 is returned.
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*/
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int tep_get_header_timestamp_size(struct tep_handle *tep)
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{
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if (tep)
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return tep->header_page_ts_size;
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return 0;
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}
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/**
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* tep_get_cpus - get the number of CPUs
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* @tep: a handle to the tep_handle
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*
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* This returns the number of CPUs
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* If @tep is NULL, 0 is returned.
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*/
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int tep_get_cpus(struct tep_handle *tep)
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{
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if (tep)
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return tep->cpus;
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return 0;
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}
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/**
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* tep_set_cpus - set the number of CPUs
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* @tep: a handle to the tep_handle
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*
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* This sets the number of CPUs
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*/
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void tep_set_cpus(struct tep_handle *tep, int cpus)
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{
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if (tep)
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tep->cpus = cpus;
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}
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/**
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* tep_get_long_size - get the size of a long integer on the traced machine
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* @tep: a handle to the tep_handle
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*
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* This returns the size of a long integer on the traced machine
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* If @tep is NULL, 0 is returned.
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*/
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int tep_get_long_size(struct tep_handle *tep)
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{
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if (tep)
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return tep->long_size;
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return 0;
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}
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/**
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* tep_set_long_size - set the size of a long integer on the traced machine
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* @tep: a handle to the tep_handle
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* @size: size, in bytes, of a long integer
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*
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* This sets the size of a long integer on the traced machine
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*/
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void tep_set_long_size(struct tep_handle *tep, int long_size)
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{
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if (tep)
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tep->long_size = long_size;
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}
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/**
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* tep_get_page_size - get the size of a memory page on the traced machine
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* @tep: a handle to the tep_handle
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*
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* This returns the size of a memory page on the traced machine
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* If @tep is NULL, 0 is returned.
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*/
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int tep_get_page_size(struct tep_handle *tep)
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{
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if (tep)
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return tep->page_size;
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return 0;
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}
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/**
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* tep_set_page_size - set the size of a memory page on the traced machine
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* @tep: a handle to the tep_handle
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* @_page_size: size of a memory page, in bytes
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*
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* This sets the size of a memory page on the traced machine
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*/
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void tep_set_page_size(struct tep_handle *tep, int _page_size)
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{
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if (tep)
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tep->page_size = _page_size;
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}
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/**
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* tep_is_file_bigendian - return the endian of the file
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* @tep: a handle to the tep_handle
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*
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* This returns true if the file is in big endian order
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* If @tep is NULL, false is returned.
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*/
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bool tep_is_file_bigendian(struct tep_handle *tep)
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{
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if (tep)
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return (tep->file_bigendian == TEP_BIG_ENDIAN);
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return false;
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}
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/**
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* tep_set_file_bigendian - set if the file is in big endian order
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* @tep: a handle to the tep_handle
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* @endian: non zero, if the file is in big endian order
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*
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* This sets if the file is in big endian order
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*/
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void tep_set_file_bigendian(struct tep_handle *tep, enum tep_endian endian)
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{
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if (tep)
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tep->file_bigendian = endian;
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}
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/**
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* tep_is_local_bigendian - return the endian of the saved local machine
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* @tep: a handle to the tep_handle
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*
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* This returns true if the saved local machine in @tep is big endian.
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* If @tep is NULL, false is returned.
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*/
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bool tep_is_local_bigendian(struct tep_handle *tep)
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{
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if (tep)
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return (tep->host_bigendian == TEP_BIG_ENDIAN);
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return 0;
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}
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/**
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* tep_set_local_bigendian - set the stored local machine endian order
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* @tep: a handle to the tep_handle
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* @endian: non zero, if the local host has big endian order
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*
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* This sets the endian order for the local machine.
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*/
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void tep_set_local_bigendian(struct tep_handle *tep, enum tep_endian endian)
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{
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if (tep)
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tep->host_bigendian = endian;
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}
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/**
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* tep_is_old_format - get if an old kernel is used
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* @tep: a handle to the tep_handle
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*
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* This returns true, if an old kernel is used to generate the tracing events or
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* false if a new kernel is used. Old kernels did not have header page info.
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* If @tep is NULL, false is returned.
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*/
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bool tep_is_old_format(struct tep_handle *tep)
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{
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if (tep)
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return tep->old_format;
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return false;
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}
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/**
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* tep_set_test_filters - set a flag to test a filter string
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* @tep: a handle to the tep_handle
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* @test_filters: the new value of the test_filters flag
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*
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* This sets a flag to test a filter string. If this flag is set, when
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* tep_filter_add_filter_str() API as called,it will print the filter string
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* instead of adding it.
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*/
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void tep_set_test_filters(struct tep_handle *tep, int test_filters)
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{
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if (tep)
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tep->test_filters = test_filters;
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}
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