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Commit 4171925a authored by Ian Rogers's avatar Ian Rogers Committed by Arnaldo Carvalho de Melo
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tools lib traceevent: Remove libtraceevent 

libtraceevent is now out-of-date and it is better to depend on the
system version. Remove this code that is no longer depended upon by
any builds.

Committer notes:

Removed the removed tools/lib/traceevent/ from tools/perf/MANIFEST, so
that 'make perf-tar-src-pkg' works.
Signed-off-by: default avatarIan Rogers <irogers@google.com>
Acked-by: default avatarSteven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20221130062935.2219247-5-irogers@google.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
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tools/lib/traceevent/.gitignore deleted 100644 → 0
View file @ 378ef0f5
# SPDX-License-Identifier: GPL-2.0-only
TRACEEVENT-CFLAGS
libtraceevent-dynamic-list
libtraceevent.so.*
tools/lib/traceevent/Build deleted 100644 → 0
View file @ 378ef0f5
libtraceevent-y += event-parse.o
libtraceevent-y += event-plugin.o
libtraceevent-y += trace-seq.o
libtraceevent-y += parse-filter.o
libtraceevent-y += parse-utils.o
libtraceevent-y += kbuffer-parse.o
libtraceevent-y += tep_strerror.o
libtraceevent-y += event-parse-api.o
tools/lib/traceevent/Documentation/Makefile deleted 100644 → 0
View file @ 378ef0f5
include ../../../scripts/Makefile.include
include ../../../scripts/utilities.mak
# This Makefile and manpage XSL files were taken from tools/perf/Documentation
# and modified for libtraceevent.
MAN3_TXT= \
$(wildcard libtraceevent-*.txt) \
libtraceevent.txt
MAN_TXT = $(MAN3_TXT)
_MAN_XML=$(patsubst %.txt,%.xml,$(MAN_TXT))
_MAN_HTML=$(patsubst %.txt,%.html,$(MAN_TXT))
_DOC_MAN3=$(patsubst %.txt,%.3,$(MAN3_TXT))
MAN_XML=$(addprefix $(OUTPUT),$(_MAN_XML))
MAN_HTML=$(addprefix $(OUTPUT),$(_MAN_HTML))
DOC_MAN3=$(addprefix $(OUTPUT),$(_DOC_MAN3))
# Make the path relative to DESTDIR, not prefix
ifndef DESTDIR
prefix?=$(HOME)
endif
bindir?=$(prefix)/bin
htmldir?=$(prefix)/share/doc/libtraceevent-doc
pdfdir?=$(prefix)/share/doc/libtraceevent-doc
mandir?=$(prefix)/share/man
man3dir=$(mandir)/man3
ASCIIDOC=asciidoc
ASCIIDOC_EXTRA = --unsafe -f asciidoc.conf
ASCIIDOC_HTML = xhtml11
MANPAGE_XSL = manpage-normal.xsl
XMLTO_EXTRA =
INSTALL?=install
RM ?= rm -f
ifdef USE_ASCIIDOCTOR
ASCIIDOC = asciidoctor
ASCIIDOC_EXTRA = -a compat-mode
ASCIIDOC_EXTRA += -I. -rasciidoctor-extensions
ASCIIDOC_EXTRA += -a mansource="libtraceevent" -a manmanual="libtraceevent Manual"
ASCIIDOC_HTML = xhtml5
endif
XMLTO=xmlto
_tmp_tool_path := $(call get-executable,$(ASCIIDOC))
ifeq ($(_tmp_tool_path),)
missing_tools = $(ASCIIDOC)
endif
ifndef USE_ASCIIDOCTOR
_tmp_tool_path := $(call get-executable,$(XMLTO))
ifeq ($(_tmp_tool_path),)
missing_tools += $(XMLTO)
endif
endif
#
# For asciidoc ...
# -7.1.2, no extra settings are needed.
# 8.0-, set ASCIIDOC8.
#
#
# For docbook-xsl ...
# -1.68.1, set ASCIIDOC_NO_ROFF? (based on changelog from 1.73.0)
# 1.69.0, no extra settings are needed?
# 1.69.1-1.71.0, set DOCBOOK_SUPPRESS_SP?
# 1.71.1, no extra settings are needed?
# 1.72.0, set DOCBOOK_XSL_172.
# 1.73.0-, set ASCIIDOC_NO_ROFF
#
#
# If you had been using DOCBOOK_XSL_172 in an attempt to get rid
# of 'the ".ft C" problem' in your generated manpages, and you
# instead ended up with weird characters around callouts, try
# using ASCIIDOC_NO_ROFF instead (it works fine with ASCIIDOC8).
#
ifdef ASCIIDOC8
ASCIIDOC_EXTRA += -a asciidoc7compatible
endif
ifdef DOCBOOK_XSL_172
ASCIIDOC_EXTRA += -a libtraceevent-asciidoc-no-roff
MANPAGE_XSL = manpage-1.72.xsl
else
ifdef ASCIIDOC_NO_ROFF
# docbook-xsl after 1.72 needs the regular XSL, but will not
# pass-thru raw roff codes from asciidoc.conf, so turn them off.
ASCIIDOC_EXTRA += -a libtraceevent-asciidoc-no-roff
endif
endif
ifdef MAN_BOLD_LITERAL
XMLTO_EXTRA += -m manpage-bold-literal.xsl
endif
ifdef DOCBOOK_SUPPRESS_SP
XMLTO_EXTRA += -m manpage-suppress-sp.xsl
endif
SHELL_PATH ?= $(SHELL)
# Shell quote;
SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
DESTDIR ?=
DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'
export DESTDIR DESTDIR_SQ
#
# Please note that there is a minor bug in asciidoc.
# The version after 6.0.3 _will_ include the patch found here:
# http://marc.theaimsgroup.com/?l=libtraceevent&m=111558757202243&w=2
#
# Until that version is released you may have to apply the patch
# yourself - yes, all 6 characters of it!
#
QUIET_SUBDIR0 = +$(MAKE) -C # space to separate -C and subdir
QUIET_SUBDIR1 =
ifneq ($(findstring $(MAKEFLAGS),w),w)
PRINT_DIR = --no-print-directory
else # "make -w"
NO_SUBDIR = :
endif
ifneq ($(findstring $(MAKEFLAGS),s),s)
ifneq ($(V),1)
QUIET_ASCIIDOC = @echo ' ASCIIDOC '$@;
QUIET_XMLTO = @echo ' XMLTO '$@;
QUIET_SUBDIR0 = +@subdir=
QUIET_SUBDIR1 = ;$(NO_SUBDIR) \
echo ' SUBDIR ' $$subdir; \
$(MAKE) $(PRINT_DIR) -C $$subdir
export V
endif
endif
all: html man
man: man3
man3: $(DOC_MAN3)
html: $(MAN_HTML)
$(MAN_HTML) $(DOC_MAN3): asciidoc.conf
install: install-man
check-man-tools:
ifdef missing_tools
$(error "You need to install $(missing_tools) for man pages")
endif
do-install-man: man
$(call QUIET_INSTALL, Documentation-man) \
$(INSTALL) -d -m 755 $(DESTDIR)$(man3dir); \
$(INSTALL) -m 644 $(DOC_MAN3) $(DESTDIR)$(man3dir);
install-man: check-man-tools man do-install-man
uninstall: uninstall-man
uninstall-man:
$(call QUIET_UNINST, Documentation-man) \
$(Q)$(RM) $(addprefix $(DESTDIR)$(man3dir)/,$(DOC_MAN3))
ifdef missing_tools
DO_INSTALL_MAN = $(warning Please install $(missing_tools) to have the man pages installed)
else
DO_INSTALL_MAN = do-install-man
endif
CLEAN_FILES = \
$(MAN_XML) $(addsuffix +,$(MAN_XML)) \
$(MAN_HTML) $(addsuffix +,$(MAN_HTML)) \
$(DOC_MAN3) *.3
clean:
$(call QUIET_CLEAN, Documentation) $(RM) $(CLEAN_FILES)
ifdef USE_ASCIIDOCTOR
$(OUTPUT)%.3 : $(OUTPUT)%.txt
$(QUIET_ASCIIDOC)$(RM) $@+ $@ && \
$(ASCIIDOC) -b manpage -d manpage \
$(ASCIIDOC_EXTRA) -alibtraceevent_version=$(EVENT_PARSE_VERSION) -o $@+ $< && \
mv $@+ $@
endif
$(OUTPUT)%.3 : $(OUTPUT)%.xml
$(QUIET_XMLTO)$(RM) $@ && \
$(XMLTO) -o $(OUTPUT). -m $(MANPAGE_XSL) $(XMLTO_EXTRA) man $<
$(OUTPUT)%.xml : %.txt
$(QUIET_ASCIIDOC)$(RM) $@+ $@ && \
$(ASCIIDOC) -b docbook -d manpage \
$(ASCIIDOC_EXTRA) -alibtraceevent_version=$(EVENT_PARSE_VERSION) -o $@+ $< && \
mv $@+ $@
$(MAN_HTML): $(OUTPUT)%.html : %.txt
$(QUIET_ASCIIDOC)$(RM) $@+ $@ && \
$(ASCIIDOC) -b $(ASCIIDOC_HTML) -d manpage \
$(ASCIIDOC_EXTRA) -aperf_version=$(EVENT_PARSE_VERSION) -o $@+ $< && \
mv $@+ $@
tools/lib/traceevent/Documentation/asciidoc.conf deleted 100644 → 0
View file @ 378ef0f5
## linktep: macro
#
# Usage: linktep:command[manpage-section]
#
# Note, {0} is the manpage section, while {target} is the command.
#
# Show TEP link as: <command>(<section>); if section is defined, else just show
# the command.
[macros]
(?su)[\\]?(?P<name>linktep):(?P<target>\S*?)\[(?P<attrlist>.*?)\]=
[attributes]
asterisk=&#42;
plus=&#43;
caret=&#94;
startsb=&#91;
endsb=&#93;
tilde=&#126;
ifdef::backend-docbook[]
[linktep-inlinemacro]
{0%{target}}
{0#<citerefentry>}
{0#<refentrytitle>{target}</refentrytitle><manvolnum>{0}</manvolnum>}
{0#</citerefentry>}
endif::backend-docbook[]
ifdef::backend-docbook[]
ifndef::tep-asciidoc-no-roff[]
# "unbreak" docbook-xsl v1.68 for manpages. v1.69 works with or without this.
# v1.72 breaks with this because it replaces dots not in roff requests.
[listingblock]
<example><title>{title}</title>
<literallayout>
ifdef::doctype-manpage[]
&#10;.ft C&#10;
endif::doctype-manpage[]
|
ifdef::doctype-manpage[]
&#10;.ft&#10;
endif::doctype-manpage[]
</literallayout>
{title#}</example>
endif::tep-asciidoc-no-roff[]
ifdef::tep-asciidoc-no-roff[]
ifdef::doctype-manpage[]
# The following two small workarounds insert a simple paragraph after screen
[listingblock]
<example><title>{title}</title>
<literallayout>
|
</literallayout><simpara></simpara>
{title#}</example>
[verseblock]
<formalpara{id? id="{id}"}><title>{title}</title><para>
{title%}<literallayout{id? id="{id}"}>
{title#}<literallayout>
|
</literallayout>
{title#}</para></formalpara>
{title%}<simpara></simpara>
endif::doctype-manpage[]
endif::tep-asciidoc-no-roff[]
endif::backend-docbook[]
ifdef::doctype-manpage[]
ifdef::backend-docbook[]
[header]
template::[header-declarations]
<refentry>
<refmeta>
<refentrytitle>{mantitle}</refentrytitle>
<manvolnum>{manvolnum}</manvolnum>
<refmiscinfo class="source">libtraceevent</refmiscinfo>
<refmiscinfo class="version">{libtraceevent_version}</refmiscinfo>
<refmiscinfo class="manual">libtraceevent Manual</refmiscinfo>
</refmeta>
<refnamediv>
<refname>{manname1}</refname>
<refname>{manname2}</refname>
<refname>{manname3}</refname>
<refname>{manname4}</refname>
<refname>{manname5}</refname>
<refname>{manname6}</refname>
<refname>{manname7}</refname>
<refname>{manname8}</refname>
<refname>{manname9}</refname>
<refname>{manname10}</refname>
<refname>{manname11}</refname>
<refname>{manname12}</refname>
<refname>{manname13}</refname>
<refname>{manname14}</refname>
<refname>{manname15}</refname>
<refname>{manname16}</refname>
<refname>{manname17}</refname>
<refname>{manname18}</refname>
<refname>{manname19}</refname>
<refname>{manname20}</refname>
<refname>{manname21}</refname>
<refname>{manname22}</refname>
<refname>{manname23}</refname>
<refname>{manname24}</refname>
<refname>{manname25}</refname>
<refname>{manname26}</refname>
<refname>{manname27}</refname>
<refname>{manname28}</refname>
<refname>{manname29}</refname>
<refname>{manname30}</refname>
<refpurpose>{manpurpose}</refpurpose>
</refnamediv>
endif::backend-docbook[]
endif::doctype-manpage[]
ifdef::backend-xhtml11[]
[linktep-inlinemacro]
<a href="{target}.html">{target}{0?({0})}</a>
endif::backend-xhtml11[]
tools/lib/traceevent/Documentation/libtraceevent-commands.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_register_comm, tep_override_comm, tep_pid_is_registered,
tep_data_comm_from_pid, tep_data_pid_from_comm, tep_cmdline_pid -
Manage pid to process name mappings.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
int *tep_register_comm*(struct tep_handle pass:[*]_tep_, const char pass:[*]_comm_, int _pid_);
int *tep_override_comm*(struct tep_handle pass:[*]_tep_, const char pass:[*]_comm_, int _pid_);
bool *tep_is_pid_registered*(struct tep_handle pass:[*]_tep_, int _pid_);
const char pass:[*]*tep_data_comm_from_pid*(struct tep_handle pass:[*]_pevent_, int _pid_);
struct cmdline pass:[*]*tep_data_pid_from_comm*(struct tep_handle pass:[*]_pevent_, const char pass:[*]_comm_, struct cmdline pass:[*]_next_);
int *tep_cmdline_pid*(struct tep_handle pass:[*]_pevent_, struct cmdline pass:[*]_cmdline_);
--
DESCRIPTION
-----------
These functions can be used to handle the mapping between pid and process name.
The library builds a cache of these mappings, which is used to display the name
of the process, instead of its pid. This information can be retrieved from
tracefs/saved_cmdlines file.
The _tep_register_comm()_ function registers a _pid_ / process name mapping.
If a command with the same _pid_ is already registered, an error is returned.
The _pid_ argument is the process ID, the _comm_ argument is the process name,
_tep_ is the event context. The _comm_ is duplicated internally.
The _tep_override_comm()_ function registers a _pid_ / process name mapping.
If a process with the same pid is already registered, the process name string is
udapted with the new one. The _pid_ argument is the process ID, the _comm_
argument is the process name, _tep_ is the event context. The _comm_ is
duplicated internally.
The _tep_is_pid_registered()_ function checks if a pid has a process name
mapping registered. The _pid_ argument is the process ID, _tep_ is the event
context.
The _tep_data_comm_from_pid()_ function returns the process name for a given
pid. The _pid_ argument is the process ID, _tep_ is the event context.
The returned string should not be freed, but will be freed when the _tep_
handler is closed.
The _tep_data_pid_from_comm()_ function returns a pid for a given process name.
The _comm_ argument is the process name, _tep_ is the event context.
The argument _next_ is the cmdline structure to search for the next pid.
As there may be more than one pid for a given process, the result of this call
can be passed back into a recurring call in the _next_ parameter, to search for
the next pid. If _next_ is NULL, it will return the first pid associated with
the _comm_. The function performs a linear search, so it may be slow.
The _tep_cmdline_pid()_ function returns the pid associated with a given
_cmdline_. The _tep_ argument is the event context.
RETURN VALUE
------------
_tep_register_comm()_ function returns 0 on success. In case of an error -1 is
returned and errno is set to indicate the cause of the problem: ENOMEM, if there
is not enough memory to duplicate the _comm_ or EEXIST if a mapping for this
_pid_ is already registered.
_tep_override_comm()_ function returns 0 on success. In case of an error -1 is
returned and errno is set to indicate the cause of the problem: ENOMEM, if there
is not enough memory to duplicate the _comm_.
_tep_is_pid_registered()_ function returns true if the _pid_ has a process name
mapped to it, false otherwise.
_tep_data_comm_from_pid()_ function returns the process name as string, or the
string "<...>" if there is no mapping for the given pid.
_tep_data_pid_from_comm()_ function returns a pointer to a struct cmdline, that
holds a pid for a given process, or NULL if none is found. This result can be
passed back into a recurring call as the _next_ parameter of the function.
_tep_cmdline_pid()_ functions returns the pid for the give cmdline. If _cmdline_
is NULL, then -1 is returned.
EXAMPLE
-------
The following example registers pid for command "ls", in context of event _tep_
and performs various searches for pid / process name mappings:
[source,c]
--
#include <event-parse.h>
...
int ret;
int ls_pid = 1021;
struct tep_handle *tep = tep_alloc();
...
ret = tep_register_comm(tep, "ls", ls_pid);
if (ret != 0 && errno == EEXIST)
ret = tep_override_comm(tep, "ls", ls_pid);
if (ret != 0) {
/* Failed to register pid / command mapping */
}
...
if (tep_is_pid_registered(tep, ls_pid) == 0) {
/* Command mapping for ls_pid is not registered */
}
...
const char *comm = tep_data_comm_from_pid(tep, ls_pid);
if (comm) {
/* Found process name for ls_pid */
}
...
int pid;
struct cmdline *cmd = tep_data_pid_from_comm(tep, "ls", NULL);
while (cmd) {
pid = tep_cmdline_pid(tep, cmd);
/* Found pid for process "ls" */
cmd = tep_data_pid_from_comm(tep, "ls", cmd);
}
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-cpus.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_get_cpus, tep_set_cpus - Get / set the number of CPUs, which have a tracing
buffer representing it. Note, the buffer may be empty.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
int *tep_get_cpus*(struct tep_handle pass:[*]_tep_);
void *tep_set_cpus*(struct tep_handle pass:[*]_tep_, int _cpus_);
--
DESCRIPTION
-----------
The _tep_get_cpus()_ function gets the number of CPUs, which have a tracing
buffer representing it. The _tep_ argument is trace event parser context.
The _tep_set_cpus()_ function sets the number of CPUs, which have a tracing
buffer representing it. The _tep_ argument is trace event parser context.
The _cpu_ argument is the number of CPUs with tracing data.
RETURN VALUE
------------
The _tep_get_cpus()_ functions returns the number of CPUs, which have tracing
data recorded.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
tep_set_cpus(tep, 5);
...
printf("We have tracing data for %d CPUs", tep_get_cpus(tep));
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-endian_read.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_read_number - Reads a number from raw data.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
unsigned long long *tep_read_number*(struct tep_handle pass:[*]_tep_, const void pass:[*]_ptr_, int _size_);
--
DESCRIPTION
-----------
The _tep_read_number()_ function reads an integer from raw data, taking into
account the endianness of the raw data and the current host. The _tep_ argument
is the trace event parser context. The _ptr_ is a pointer to the raw data, where
the integer is, and the _size_ is the size of the integer.
RETURN VALUE
------------
The _tep_read_number()_ function returns the integer in the byte order of
the current host. In case of an error, 0 is returned.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
void process_record(struct tep_record *record)
{
int offset = 24;
int data = tep_read_number(tep, record->data + offset, 4);
/* Read the 4 bytes at the offset 24 of data as an integer */
}
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-event_find.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_find_event,tep_find_event_by_name,tep_find_event_by_record -
Find events by given key.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
struct tep_event pass:[*]*tep_find_event*(struct tep_handle pass:[*]_tep_, int _id_);
struct tep_event pass:[*]*tep_find_event_by_name*(struct tep_handle pass:[*]_tep_, const char pass:[*]_sys_, const char pass:[*]_name_);
struct tep_event pass:[*]*tep_find_event_by_record*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_record_);
--
DESCRIPTION
-----------
This set of functions can be used to search for an event, based on a given
criteria. All functions require a pointer to a _tep_, trace event parser
context.
The _tep_find_event()_ function searches for an event by given event _id_. The
event ID is assigned dynamically and can be viewed in event's format file,
"ID" field.
The tep_find_event_by_name()_ function searches for an event by given
event _name_, under the system _sys_. If the _sys_ is NULL (not specified),
the first event with _name_ is returned.
The tep_find_event_by_record()_ function searches for an event from a given
_record_.
RETURN VALUE
------------
All these functions return a pointer to the found event, or NULL if there is no
such event.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
struct tep_event *event;
event = tep_find_event(tep, 1857);
if (event == NULL) {
/* There is no event with ID 1857 */
}
event = tep_find_event_by_name(tep, "kvm", "kvm_exit");
if (event == NULL) {
/* There is no kvm_exit event, from kvm system */
}
void event_from_record(struct tep_record *record)
{
struct tep_event *event = tep_find_event_by_record(tep, record);
if (event == NULL) {
/* There is no event from given record */
}
}
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-event_get.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_get_event, tep_get_first_event, tep_get_events_count - Access events.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
struct tep_event pass:[*]*tep_get_event*(struct tep_handle pass:[*]_tep_, int _index_);
struct tep_event pass:[*]*tep_get_first_event*(struct tep_handle pass:[*]_tep_);
int *tep_get_events_count*(struct tep_handle pass:[*]_tep_);
--
DESCRIPTION
-----------
The _tep_get_event()_ function returns a pointer to event at the given _index_.
The _tep_ argument is trace event parser context, the _index_ is the index of
the requested event.
The _tep_get_first_event()_ function returns a pointer to the first event.
As events are stored in an array, this function returns the pointer to the
beginning of the array. The _tep_ argument is trace event parser context.
The _tep_get_events_count()_ function returns the number of the events
in the array. The _tep_ argument is trace event parser context.
RETURN VALUE
------------
The _tep_get_event()_ returns a pointer to the event located at _index_.
NULL is returned in case of error, in case there are no events or _index_ is
out of range.
The _tep_get_first_event()_ returns a pointer to the first event. NULL is
returned in case of error, or in case there are no events.
The _tep_get_events_count()_ returns the number of the events. 0 is
returned in case of error, or in case there are no events.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
int i,count = tep_get_events_count(tep);
struct tep_event *event, *events = tep_get_first_event(tep);
if (events == NULL) {
/* There are no events */
} else {
for (i = 0; i < count; i++) {
event = (events+i);
/* process events[i] */
}
/* Get the last event */
event = tep_get_event(tep, count-1);
}
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-event_list.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_list_events, tep_list_events_copy -
Get list of events, sorted by given criteria.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
enum *tep_event_sort_type* {
_TEP_EVENT_SORT_ID_,
_TEP_EVENT_SORT_NAME_,
_TEP_EVENT_SORT_SYSTEM_,
};
struct tep_event pass:[*]pass:[*]*tep_list_events*(struct tep_handle pass:[*]_tep_, enum tep_event_sort_type _sort_type_);
struct tep_event pass:[*]pass:[*]*tep_list_events_copy*(struct tep_handle pass:[*]_tep_, enum tep_event_sort_type _sort_type_);
--
DESCRIPTION
-----------
The _tep_list_events()_ function returns an array of pointers to the events,
sorted by the _sort_type_ criteria. The last element of the array is NULL.
The returned memory must not be freed, it is managed by the library.
The function is not thread safe. The _tep_ argument is trace event parser
context. The _sort_type_ argument is the required sort criteria:
[verse]
--
_TEP_EVENT_SORT_ID_ - sort by the event ID.
_TEP_EVENT_SORT_NAME_ - sort by the event (name, system, id) triplet.
_TEP_EVENT_SORT_SYSTEM_ - sort by the event (system, name, id) triplet.
--
The _tep_list_events_copy()_ is a thread safe version of _tep_list_events()_.
It has the same behavior, but the returned array is allocated internally and
must be freed by the caller. Note that the content of the array must not be
freed (see the EXAMPLE below).
RETURN VALUE
------------
The _tep_list_events()_ function returns an array of pointers to events.
In case of an error, NULL is returned. The returned array must not be freed,
it is managed by the library.
The _tep_list_events_copy()_ function returns an array of pointers to events.
In case of an error, NULL is returned. The returned array must be freed by
the caller.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
int i;
struct tep_event_format **events;
i=0;
events = tep_list_events(tep, TEP_EVENT_SORT_ID);
if (events == NULL) {
/* Failed to get the events, sorted by ID */
} else {
while(events[i]) {
/* walk through the list of the events, sorted by ID */
i++;
}
}
i=0;
events = tep_list_events_copy(tep, TEP_EVENT_SORT_NAME);
if (events == NULL) {
/* Failed to get the events, sorted by name */
} else {
while(events[i]) {
/* walk through the list of the events, sorted by name */
i++;
}
free(events);
}
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-event_print.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_print_event - Writes event information into a trace sequence.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
*#include <trace-seq.h>*
void *tep_print_event*(struct tep_handle pass:[*]_tep_, struct trace_seqpass:[*]_s_, struct tep_record pass:[*]_record_, const char pass:[*]_fmt_, _..._)
--
DESCRIPTION
-----------
The _tep_print_event()_ function parses the event information of the given
_record_ and writes it into the trace sequence _s_, according to the format
string _fmt_. The desired information is specified after the format string.
The _fmt_ is printf-like format string, following arguments are supported:
[verse]
--
TEP_PRINT_PID, "%d" - PID of the event.
TEP_PRINT_CPU, "%d" - Event CPU.
TEP_PRINT_COMM, "%s" - Event command string.
TEP_PRINT_NAME, "%s" - Event name.
TEP_PRINT_LATENCY, "%s" - Latency of the event. It prints 4 or more
fields - interrupt state, scheduling state,
current context, and preemption count.
Field 1 is the interrupt enabled state:
d : Interrupts are disabled
. : Interrupts are enabled
X : The architecture does not support this
information
Field 2 is the "need resched" state.
N : The task is set to call the scheduler when
possible, as another higher priority task
may need to be scheduled in.
. : The task is not set to call the scheduler.
Field 3 is the context state.
. : Normal context
s : Soft interrupt context
h : Hard interrupt context
H : Hard interrupt context which triggered
during soft interrupt context.
z : NMI context
Z : NMI context which triggered during hard
interrupt context
Field 4 is the preemption count.
. : The preempt count is zero.
On preemptible kernels (where the task can be scheduled
out in arbitrary locations while in kernel context), the
preempt count, when non zero, will prevent the kernel
from scheduling out the current task. The preempt count
number is displayed when it is not zero.
Depending on the kernel, it may show other fields
(lock depth, or migration disabled, which are unique to
specialized kernels).
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
-------
[source,c]
--
#include <event-parse.h>
#include <trace-seq.h>
...
struct trace_seq seq;
trace_seq_init(&seq);
struct tep_handle *tep = tep_alloc();
...
void print_my_event(struct tep_record *record)
{
trace_seq_reset(&seq);
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);
}
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*trace-seq.h*
Header file to include in order to have access to trace sequences related APIs.
Trace sequences are used to allow a function to call several other functions
to create a string of data to use.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-field_find.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_find_common_field, tep_find_field, tep_find_any_field -
Search for a field in an event.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
struct tep_format_field pass:[*]*tep_find_common_field*(struct tep_event pass:[*]_event_, const char pass:[*]_name_);
struct tep_format_field pass:[*]*tep_find_field*(struct tep_event_ormat pass:[*]_event_, const char pass:[*]_name_);
struct tep_format_field pass:[*]*tep_find_any_field*(struct tep_event pass:[*]_event_, const char pass:[*]_name_);
--
DESCRIPTION
-----------
These functions search for a field with given name in an event. The field
returned can be used to find the field content from within a data record.
The _tep_find_common_field()_ function searches for a common field with _name_
in the _event_.
The _tep_find_field()_ function searches for an event specific field with
_name_ in the _event_.
The _tep_find_any_field()_ function searches for any field with _name_ in the
_event_.
RETURN VALUE
------------
The _tep_find_common_field(), _tep_find_field()_ and _tep_find_any_field()_
functions return a pointer to the found field, or NULL in case there is no field
with the requested name.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
void get_htimer_info(struct tep_handle *tep, struct tep_record *record)
{
struct tep_format_field *field;
struct tep_event *event;
long long softexpires;
int mode;
int pid;
event = tep_find_event_by_name(tep, "timer", "hrtimer_start");
field = tep_find_common_field(event, "common_pid");
if (field == NULL) {
/* Cannot find "common_pid" field in the event */
} else {
/* Get pid from the data record */
pid = tep_read_number(tep, record->data + field->offset,
field->size);
}
field = tep_find_field(event, "softexpires");
if (field == NULL) {
/* Cannot find "softexpires" event specific field in the event */
} else {
/* Get softexpires parameter from the data record */
softexpires = tep_read_number(tep, record->data + field->offset,
field->size);
}
field = tep_find_any_field(event, "mode");
if (field == NULL) {
/* Cannot find "mode" field in the event */
} else
{
/* Get mode parameter from the data record */
mode = tep_read_number(tep, record->data + field->offset,
field->size);
}
}
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-field_get_val.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_get_any_field_val, tep_get_common_field_val, tep_get_field_val,
tep_get_field_raw - Get value of a field.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
*#include <trace-seq.h>*
int *tep_get_any_field_val*(struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, unsigned long long pass:[*]_val_, int _err_);
int *tep_get_common_field_val*(struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, unsigned long long pass:[*]_val_, int _err_);
int *tep_get_field_val*(struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, unsigned long long pass:[*]_val_, int _err_);
void pass:[*]*tep_get_field_raw*(struct trace_seq pass:[*]_s_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, int pass:[*]_len_, int _err_);
--
DESCRIPTION
-----------
These functions can be used to find a field and retrieve its value.
The _tep_get_any_field_val()_ function searches in the _record_ for a field
with _name_, part of the _event_. If the field is found, its value is stored in
_val_. If there is an error and _err_ is not zero, then an error string is
written into _s_.
The _tep_get_common_field_val()_ function does the same as
_tep_get_any_field_val()_, but searches only in the common fields. This works
for any event as all events include the common fields.
The _tep_get_field_val()_ function does the same as _tep_get_any_field_val()_,
but searches only in the event specific fields.
The _tep_get_field_raw()_ function searches in the _record_ for a field with
_name_, part of the _event_. If the field is found, a pointer to where the field
exists in the record's raw data is returned. The size of the data is stored in
_len_. If there is an error and _err_ is not zero, then an error string is
written into _s_.
RETURN VALUE
------------
The _tep_get_any_field_val()_, _tep_get_common_field_val()_ and
_tep_get_field_val()_ functions return 0 on success, or -1 in case of an error.
The _tep_get_field_raw()_ function returns a pointer to field's raw data, and
places the length of this data in _len_. In case of an error NULL is returned.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
#include <trace-seq.h>
...
struct tep_handle *tep = tep_alloc();
...
struct tep_event *event = tep_find_event_by_name(tep, "kvm", "kvm_exit");
...
void process_record(struct tep_record *record)
{
int len;
char *comm;
struct tep_event_format *event;
unsigned long long val;
event = tep_find_event_by_record(pevent, record);
if (event != NULL) {
if (tep_get_common_field_val(NULL, event, "common_type",
record, &val, 0) == 0) {
/* Got the value of common type field */
}
if (tep_get_field_val(NULL, event, "pid", record, &val, 0) == 0) {
/* Got the value of pid specific field */
}
comm = tep_get_field_raw(NULL, event, "comm", record, &len, 0);
if (comm != NULL) {
/* Got a pointer to the comm event specific field */
}
}
}
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*trace-seq.h*
Header file to include in order to have access to trace sequences
related APIs. Trace sequences are used to allow a function to call
several other functions to create a string of data to use.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-field_print.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_print_field, tep_print_fields, tep_print_num_field, tep_print_func_field -
Print the field content.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
*#include <trace-seq.h>*
void *tep_print_field*(struct trace_seq pass:[*]_s_, void pass:[*]_data_, struct tep_format_field pass:[*]_field_);
void *tep_print_fields*(struct trace_seq pass:[*]_s_, void pass:[*]_data_, int _size_, struct tep_event pass:[*]_event_);
int *tep_print_num_field*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, int _err_);
int *tep_print_func_field*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, struct tep_event pass:[*]_event_, const char pass:[*]_name_, struct tep_record pass:[*]_record_, int _err_);
--
DESCRIPTION
-----------
These functions print recorded field's data, according to the field's type.
The _tep_print_field()_ function extracts from the recorded raw _data_ value of
the _field_ and prints it into _s_, according to the field type.
The _tep_print_fields()_ prints each field name followed by the record's field
value according to the field's type:
[verse]
--
"field1_name=field1_value field2_name=field2_value ..."
--
It iterates all fields of the _event_, and calls _tep_print_field()_ for each of
them.
The _tep_print_num_field()_ function prints a numeric field with given format
string. A search is performed in the _event_ for a field with _name_. If such
field is found, its value is extracted from the _record_ and is printed in the
_s_, according to the given format string _fmt_. If the argument _err_ is
non-zero, and an error occures - it is printed in the _s_.
The _tep_print_func_field()_ function prints a function field with given format
string. A search is performed in the _event_ for a field with _name_. If such
field is found, its value is extracted from the _record_. The value is assumed
to be a function address, and a search is perform to find the name of this
function. The function name (if found) and its address are printed in the _s_,
according to the given format string _fmt_. If the argument _err_ is non-zero,
and an error occures - it is printed in _s_.
RETURN VALUE
------------
The _tep_print_num_field()_ and _tep_print_func_field()_ functions return 1
on success, -1 in case of an error or 0 if the print buffer _s_ is full.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
#include <trace-seq.h>
...
struct tep_handle *tep = tep_alloc();
...
struct trace_seq seq;
trace_seq_init(&seq);
struct tep_event *event = tep_find_event_by_name(tep, "timer", "hrtimer_start");
...
void process_record(struct tep_record *record)
{
struct tep_format_field *field_pid = tep_find_common_field(event, "common_pid");
trace_seq_reset(&seq);
/* Print the value of "common_pid" */
tep_print_field(&seq, record->data, field_pid);
/* Print all fields of the "hrtimer_start" event */
tep_print_fields(&seq, record->data, record->size, event);
/* Print the value of "expires" field with custom format string */
tep_print_num_field(&seq, " timer expires in %llu ", event, "expires", record, 0);
/* Print the address and the name of "function" field with custom format string */
tep_print_func_field(&seq, " timer function is %s ", event, "function", record, 0);
}
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*trace-seq.h*
Header file to include in order to have access to trace sequences related APIs.
Trace sequences are used to allow a function to call several other functions
to create a string of data to use.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-field_read.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_read_number_field - Reads a number from raw data.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
int *tep_read_number_field*(struct tep_format_field pass:[*]_field_, const void pass:[*]_data_, unsigned long long pass:[*]_value_);
--
DESCRIPTION
-----------
The _tep_read_number_field()_ function reads the value of the _field_ from the
raw _data_ and stores it in the _value_. The function sets the _value_ according
to the endianness of the raw data and the current machine and stores it in
_value_.
RETURN VALUE
------------
The _tep_read_number_field()_ function retunrs 0 in case of success, or -1 in
case of an error.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
struct tep_event *event = tep_find_event_by_name(tep, "timer", "hrtimer_start");
...
void process_record(struct tep_record *record)
{
unsigned long long pid;
struct tep_format_field *field_pid = tep_find_common_field(event, "common_pid");
if (tep_read_number_field(field_pid, record->data, &pid) != 0) {
/* Failed to get "common_pid" value */
}
}
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-fields.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_event_common_fields, tep_event_fields - Get a list of fields for an event.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
struct tep_format_field pass:[*]pass:[*]*tep_event_common_fields*(struct tep_event pass:[*]_event_);
struct tep_format_field pass:[*]pass:[*]*tep_event_fields*(struct tep_event pass:[*]_event_);
--
DESCRIPTION
-----------
The _tep_event_common_fields()_ function returns an array of pointers to common
fields for the _event_. The array is allocated in the function and must be freed
by free(). The last element of the array is NULL.
The _tep_event_fields()_ function returns an array of pointers to event specific
fields for the _event_. The array is allocated in the function and must be freed
by free(). The last element of the array is NULL.
RETURN VALUE
------------
Both _tep_event_common_fields()_ and _tep_event_fields()_ functions return
an array of pointers to tep_format_field structures in case of success, or
NULL in case of an error.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
int i;
struct tep_format_field **fields;
struct tep_event *event = tep_find_event_by_name(tep, "kvm", "kvm_exit");
if (event != NULL) {
fields = tep_event_common_fields(event);
if (fields != NULL) {
i = 0;
while (fields[i]) {
/*
walk through the list of the common fields
of the kvm_exit event
*/
i++;
}
free(fields);
}
fields = tep_event_fields(event);
if (fields != NULL) {
i = 0;
while (fields[i]) {
/*
walk through the list of the event specific
fields of the kvm_exit event
*/
i++;
}
free(fields);
}
}
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-file_endian.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_is_file_bigendian, tep_set_file_bigendian - Get / set the endianness of the
raw data being accessed by the tep handler.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
enum *tep_endian* {
TEP_LITTLE_ENDIAN = 0,
TEP_BIG_ENDIAN
};
bool *tep_is_file_bigendian*(struct tep_handle pass:[*]_tep_);
void *tep_set_file_bigendian*(struct tep_handle pass:[*]_tep_, enum tep_endian _endian_);
--
DESCRIPTION
-----------
The _tep_is_file_bigendian()_ function gets the endianness of the raw data,
being accessed by the tep handler. The _tep_ argument is trace event parser
context.
The _tep_set_file_bigendian()_ function sets the endianness of raw data being
accessed by the tep handler. The _tep_ argument is trace event parser context.
[verse]
--
The _endian_ argument is the endianness:
_TEP_LITTLE_ENDIAN_ - the raw data is in little endian format,
_TEP_BIG_ENDIAN_ - the raw data is in big endian format.
--
RETURN VALUE
------------
The _tep_is_file_bigendian()_ function returns true if the data is in bigendian
format, false otherwise.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
tep_set_file_bigendian(tep, TEP_LITTLE_ENDIAN);
...
if (tep_is_file_bigendian(tep)) {
/* The raw data is in big endian */
} else {
/* The raw data is in little endian */
}
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-filter.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_filter_alloc, tep_filter_free, tep_filter_reset, tep_filter_make_string,
tep_filter_copy, tep_filter_compare, tep_filter_match, tep_event_filtered,
tep_filter_remove_event, tep_filter_strerror, tep_filter_add_filter_str -
Event filter related APIs.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
struct tep_event_filter pass:[*]*tep_filter_alloc*(struct tep_handle pass:[*]_tep_);
void *tep_filter_free*(struct tep_event_filter pass:[*]_filter_);
void *tep_filter_reset*(struct tep_event_filter pass:[*]_filter_);
enum tep_errno *tep_filter_add_filter_str*(struct tep_event_filter pass:[*]_filter_, const char pass:[*]_filter_str_);
int *tep_event_filtered*(struct tep_event_filter pass:[*]_filter_, int _event_id_);
int *tep_filter_remove_event*(struct tep_event_filter pass:[*]_filter_, int _event_id_);
enum tep_errno *tep_filter_match*(struct tep_event_filter pass:[*]_filter_, struct tep_record pass:[*]_record_);
int *tep_filter_copy*(struct tep_event_filter pass:[*]_dest_, struct tep_event_filter pass:[*]_source_);
int *tep_filter_compare*(struct tep_event_filter pass:[*]_filter1_, struct tep_event_filter pass:[*]_filter2_);
char pass:[*]*tep_filter_make_string*(struct tep_event_filter pass:[*]_filter_, int _event_id_);
int *tep_filter_strerror*(struct tep_event_filter pass:[*]_filter_, enum tep_errno _err_, char pass:[*]buf, size_t _buflen_);
--
DESCRIPTION
-----------
Filters can be attached to traced events. They can be used to filter out various
events when outputting them. Each event can be filtered based on its parameters,
described in the event's format file. This set of functions can be used to
create, delete, modify and attach event filters.
The _tep_filter_alloc()_ function creates a new event filter. The _tep_ argument
is the trace event parser context.
The _tep_filter_free()_ function frees an event filter and all resources that it
had used.
The _tep_filter_reset()_ function removes all rules from an event filter and
resets it.
The _tep_filter_add_filter_str()_ function adds a new rule to the _filter_. The
_filter_str_ argument is the filter string, that contains the rule.
The _tep_event_filtered()_ function checks if the event with _event_id_ has
_filter_.
The _tep_filter_remove_event()_ function removes a _filter_ for an event with
_event_id_.
The _tep_filter_match()_ function tests if a _record_ matches given _filter_.
The _tep_filter_copy()_ function copies a _source_ filter into a _dest_ filter.
The _tep_filter_compare()_ function compares two filers - _filter1_ and _filter2_.
The _tep_filter_make_string()_ function constructs a string, displaying
the _filter_ contents for given _event_id_.
The _tep_filter_strerror()_ function copies the _filter_ error buffer into the
given _buf_ with the size _buflen_. If the error buffer is empty, in the _buf_
is copied a string, describing the error _err_.
RETURN VALUE
------------
The _tep_filter_alloc()_ function returns a pointer to the newly created event
filter, or NULL in case of an error.
The _tep_filter_add_filter_str()_ function returns 0 if the rule was
successfully added or a negative error code. Use _tep_filter_strerror()_ to see
actual error message in case of an error.
The _tep_event_filtered()_ function returns 1 if the filter is found for given
event, or 0 otherwise.
The _tep_filter_remove_event()_ function returns 1 if the vent was removed, or
0 if the event was not found.
The _tep_filter_match()_ function returns _tep_errno_, according to the result:
[verse]
--
_pass:[TEP_ERRNO__FILTER_MATCH]_ - filter found for event, the record matches.
_pass:[TEP_ERRNO__FILTER_MISS]_ - filter found for event, the record does not match.
_pass:[TEP_ERRNO__FILTER_NOT_FOUND]_ - no filter found for record's event.
_pass:[TEP_ERRNO__NO_FILTER]_ - no rules in the filter.
--
or any other _tep_errno_, if an error occurred during the test.
The _tep_filter_copy()_ function returns 0 on success or -1 if not all rules
were copied.
The _tep_filter_compare()_ function returns 1 if the two filters hold the same
content, or 0 if they do not.
The _tep_filter_make_string()_ function returns a string, which must be freed
with free(), or NULL in case of an error.
The _tep_filter_strerror()_ function returns 0 if message was filled
successfully, or -1 in case of an error.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
char errstr[200];
int ret;
struct tep_event_filter *filter = tep_filter_alloc(tep);
struct tep_event_filter *filter1 = tep_filter_alloc(tep);
ret = tep_filter_add_filter_str(filter, "sched/sched_wakeup:target_cpu==1");
if(ret < 0) {
tep_filter_strerror(filter, ret, errstr, sizeof(errstr));
/* Failed to add a new rule to the filter, the error string is in errstr */
}
if (tep_filter_copy(filter1, filter) != 0) {
/* Failed to copy filter in filter1 */
}
...
if (tep_filter_compare(filter, filter1) != 1) {
/* Both filters are different */
}
...
void process_record(struct tep_handle *tep, struct tep_record *record)
{
struct tep_event *event;
char *fstring;
event = tep_find_event_by_record(tep, record);
if (tep_event_filtered(filter, event->id) == 1) {
/* The event has filter */
fstring = tep_filter_make_string(filter, event->id);
if (fstring != NULL) {
/* The filter for the event is in fstring */
free(fstring);
}
}
switch (tep_filter_match(filter, record)) {
case TEP_ERRNO__FILTER_MATCH:
/* The filter matches the record */
break;
case TEP_ERRNO__FILTER_MISS:
/* The filter does not match the record */
break;
case TEP_ERRNO__FILTER_NOT_FOUND:
/* No filter found for record's event */
break;
case TEP_ERRNO__NO_FILTER:
/* There are no rules in the filter */
break
default:
/* An error occurred during the test */
break;
}
if (tep_filter_remove_event(filter, event->id) == 1) {
/* The event was removed from the filter */
}
}
...
tep_filter_reset(filter);
...
tep_filter_free(filter);
tep_filter_free(filter1);
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-func_apis.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_find_function, tep_find_function_address, tep_set_function_resolver,
tep_reset_function_resolver, tep_register_function, tep_register_print_string -
function related tep APIs
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
typedef char pass:[*](*tep_func_resolver_t*)(void pass:[*]_priv_, unsigned long long pass:[*]_addrp_, char pass:[**]_modp_);
int *tep_set_function_resolver*(struct tep_handle pass:[*]_tep_, tep_func_resolver_t pass:[*]_func_, void pass:[*]_priv_);
void *tep_reset_function_resolver*(struct tep_handle pass:[*]_tep_);
const char pass:[*]*tep_find_function*(struct tep_handle pass:[*]_tep_, unsigned long long _addr_);
unsigned long long *tep_find_function_address*(struct tep_handle pass:[*]_tep_, unsigned long long _addr_);
int *tep_register_function*(struct tep_handle pass:[*]_tep_, char pass:[*]_name_, unsigned long long _addr_, char pass:[*]_mod_);
int *tep_register_print_string*(struct tep_handle pass:[*]_tep_, const char pass:[*]_fmt_, unsigned long long _addr_);
--
DESCRIPTION
-----------
Some tools may have already a way to resolve the kernel functions. These APIs
allow them to keep using it instead of duplicating all the entries inside.
The _tep_func_resolver_t_ type is the prototype of the alternative kernel
functions resolver. This function receives a pointer to its custom context
(set with the _tep_set_function_resolver()_ call ) and the address of a kernel
function, which has to be resolved. In case of success, it should return
the name of the function and its module (if any) in _modp_.
The _tep_set_function_resolver()_ function registers _func_ as an alternative
kernel functions resolver. The _tep_ argument is trace event parser context.
The _priv_ argument is a custom context of the _func_ function. The function
resolver is used by the APIs _tep_find_function()_,
_tep_find_function_address()_, and _tep_print_func_field()_ to resolve
a function address to a function name.
The _tep_reset_function_resolver()_ function resets the kernel functions
resolver to the default function. The _tep_ argument is trace event parser
context.
These APIs can be used to find function name and start address, by given
address. The given address does not have to be exact, it will select
the function that would contain it.
The _tep_find_function()_ function returns the function name, which contains the
given address _addr_. The _tep_ argument is the trace event parser context.
The _tep_find_function_address()_ function returns the function start address,
by given address _addr_. The _addr_ does not have to be exact, it will select
the function that would contain it. The _tep_ argument is the trace event
parser context.
The _tep_register_function()_ function registers a function name mapped to an
address and (optional) module. This mapping is used in case the function tracer
or events have "%pS" parameter in its format string. It is common to pass in
the kallsyms function names with their corresponding addresses with this
function. The _tep_ argument is the trace event parser context. The _name_ is
the name of the function, the string is copied internally. The _addr_ is the
start address of the function. The _mod_ is the kernel module the function may
be in (NULL for none).
The _tep_register_print_string()_ function registers a string by the address
it was stored in the kernel. Some strings internal to the kernel with static
address are passed to certain events. The "%s" in the event's format field
which has an address needs to know what string would be at that address. The
tep_register_print_string() supplies the parsing with the mapping between kernel
addresses and those strings. The _tep_ argument is the trace event parser
context. The _fmt_ is the string to register, it is copied internally.
The _addr_ is the address the string was located at.
RETURN VALUE
------------
The _tep_set_function_resolver()_ function returns 0 in case of success, or -1
in case of an error.
The _tep_find_function()_ function returns the function name, or NULL in case
it cannot be found.
The _tep_find_function_address()_ function returns the function start address,
or 0 in case it cannot be found.
The _tep_register_function()_ function returns 0 in case of success. In case of
an error -1 is returned, and errno is set to the appropriate error number.
The _tep_register_print_string()_ function returns 0 in case of success. In case
of an error -1 is returned, and errno is set to the appropriate error number.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
char *my_resolve_kernel_addr(void *context,
unsigned long long *addrp, char **modp)
{
struct db *function_database = context;
struct symbol *sym = sql_lookup(function_database, *addrp);
if (!sym)
return NULL;
*modp = sym->module_name;
return sym->name;
}
void show_function( unsigned long long addr)
{
unsigned long long fstart;
const char *fname;
if (tep_set_function_resolver(tep, my_resolve_kernel_addr,
function_database) != 0) {
/* failed to register my_resolve_kernel_addr */
}
/* These APIs use my_resolve_kernel_addr() to resolve the addr */
fname = tep_find_function(tep, addr);
fstart = tep_find_function_address(tep, addr);
/*
addr is in function named fname, starting at fstart address,
at offset (addr - fstart)
*/
tep_reset_function_resolver(tep);
}
...
if (tep_register_function(tep, "kvm_exit",
(unsigned long long) 0x12345678, "kvm") != 0) {
/* Failed to register kvm_exit address mapping */
}
...
if (tep_register_print_string(tep, "print string",
(unsigned long long) 0x87654321, NULL) != 0) {
/* Failed to register "print string" address mapping */
}
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-func_find.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_find_function,tep_find_function_address - Find function name / start address.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
const char pass:[*]*tep_find_function*(struct tep_handle pass:[*]_tep_, unsigned long long _addr_);
unsigned long long *tep_find_function_address*(struct tep_handle pass:[*]_tep_, unsigned long long _addr_);
--
DESCRIPTION
-----------
These functions can be used to find function name and start address, by given
address. The given address does not have to be exact, it will select the function
that would contain it.
The _tep_find_function()_ function returns the function name, which contains the
given address _addr_. The _tep_ argument is the trace event parser context.
The _tep_find_function_address()_ function returns the function start address,
by given address _addr_. The _addr_ does not have to be exact, it will select the
function that would contain it. The _tep_ argument is the trace event parser context.
RETURN VALUE
------------
The _tep_find_function()_ function returns the function name, or NULL in case
it cannot be found.
The _tep_find_function_address()_ function returns the function start address,
or 0 in case it cannot be found.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
void show_function( unsigned long long addr)
{
const char *fname = tep_find_function(tep, addr);
unsigned long long fstart = tep_find_function_address(tep, addr);
/* addr is in function named fname, starting at fstart address, at offset (addr - fstart) */
}
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-handle.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_alloc, tep_free,tep_ref, tep_unref,tep_get_ref - Create, destroy, manage
references of trace event parser context.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
struct tep_handle pass:[*]*tep_alloc*(void);
void *tep_free*(struct tep_handle pass:[*]_tep_);
void *tep_ref*(struct tep_handle pass:[*]_tep_);
void *tep_unref*(struct tep_handle pass:[*]_tep_);
int *tep_get_ref*(struct tep_handle pass:[*]_tep_);
--
DESCRIPTION
-----------
These are the main functions to create and destroy tep_handle - the main
structure, representing the trace event parser context. This context is used as
the input parameter of most library APIs.
The _tep_alloc()_ function allocates and initializes the tep context.
The _tep_free()_ function will decrement the reference of the _tep_ handler.
When there is no more references, then it will free the handler, as well
as clean up all its resources that it had used. The argument _tep_ is
the pointer to the trace event parser context.
The _tep_ref()_ function adds a reference to the _tep_ handler.
The _tep_unref()_ function removes a reference from the _tep_ handler. When
the last reference is removed, the _tep_ is destroyed, and all resources that
it had used are cleaned up.
The _tep_ref_get()_ functions gets the current references of the _tep_ handler.
RETURN VALUE
------------
_tep_alloc()_ returns a pointer to a newly created tep_handle structure.
NULL is returned in case there is not enough free memory to allocate it.
_tep_ref_get()_ returns the current references of _tep_.
If _tep_ is NULL, 0 is returned.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
int ref = tep_get_ref(tep);
tep_ref(tep);
if ( (ref+1) != tep_get_ref(tep)) {
/* Something wrong happened, the counter is not incremented by 1 */
}
tep_unref(tep);
...
tep_free(tep);
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-header_page.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_get_header_page_size, tep_get_header_timestamp_size, tep_is_old_format -
Get the data stored in the header page, in kernel context.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
int *tep_get_header_page_size*(struct tep_handle pass:[*]_tep_);
int *tep_get_header_timestamp_size*(struct tep_handle pass:[*]_tep_);
bool *tep_is_old_format*(struct tep_handle pass:[*]_tep_);
--
DESCRIPTION
-----------
These functions retrieve information from kernel context, stored in tracefs
events/header_page. Old kernels do not have header page info, so default values
from user space context are used.
The _tep_get_header_page_size()_ function returns the size of a long integer,
in kernel context. The _tep_ argument is trace event parser context.
This information is retrieved from tracefs events/header_page, "commit" field.
The _tep_get_header_timestamp_size()_ function returns the size of timestamps,
in kernel context. The _tep_ argument is trace event parser context. This
information is retrieved from tracefs events/header_page, "timestamp" field.
The _tep_is_old_format()_ function returns true if the kernel predates
the addition of events/header_page, otherwise it returns false.
RETURN VALUE
------------
The _tep_get_header_page_size()_ function returns the size of a long integer,
in bytes.
The _tep_get_header_timestamp_size()_ function returns the size of timestamps,
in bytes.
The _tep_is_old_format()_ function returns true, if an old kernel is used to
generate the tracing data, which has no event/header_page. If the kernel is new,
or _tep_ is NULL, false is returned.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
int longsize;
int timesize;
bool old;
longsize = tep_get_header_page_size(tep);
timesize = tep_get_header_timestamp_size(tep);
old = tep_is_old_format(tep);
printf ("%s kernel is used to generate the tracing data.\n",
old?"Old":"New");
printf("The size of a long integer is %d bytes.\n", longsize);
printf("The timestamps size is %d bytes.\n", timesize);
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-host_endian.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_is_bigendian, tep_is_local_bigendian, tep_set_local_bigendian - Get / set
the endianness of the local machine.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
enum *tep_endian* {
TEP_LITTLE_ENDIAN = 0,
TEP_BIG_ENDIAN
};
int *tep_is_bigendian*(void);
bool *tep_is_local_bigendian*(struct tep_handle pass:[*]_tep_);
void *tep_set_local_bigendian*(struct tep_handle pass:[*]_tep_, enum tep_endian _endian_);
--
DESCRIPTION
-----------
The _tep_is_bigendian()_ gets the endianness of the machine, executing
the function.
The _tep_is_local_bigendian()_ function gets the endianness of the local
machine, saved in the _tep_ handler. The _tep_ argument is the trace event
parser context. This API is a bit faster than _tep_is_bigendian()_, as it
returns cached endianness of the local machine instead of checking it each time.
The _tep_set_local_bigendian()_ function sets the endianness of the local
machine in the _tep_ handler. The _tep_ argument is trace event parser context.
The _endian_ argument is the endianness:
[verse]
--
_TEP_LITTLE_ENDIAN_ - the machine is little endian,
_TEP_BIG_ENDIAN_ - the machine is big endian.
--
RETURN VALUE
------------
The _tep_is_bigendian()_ function returns non zero if the endianness of the
machine, executing the code, is big endian and zero otherwise.
The _tep_is_local_bigendian()_ function returns true, if the endianness of the
local machine, saved in the _tep_ handler, is big endian, or false otherwise.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
if (tep_is_bigendian())
tep_set_local_bigendian(tep, TEP_BIG_ENDIAN);
else
tep_set_local_bigendian(tep, TEP_LITTLE_ENDIAN);
...
if (tep_is_local_bigendian(tep))
printf("This machine you are running on is bigendian\n");
else
printf("This machine you are running on is little endian\n");
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-long_size.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_get_long_size, tep_set_long_size - Get / set the size of a long integer on
the machine, where the trace is generated, in bytes
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
int *tep_get_long_size*(strucqt tep_handle pass:[*]_tep_);
void *tep_set_long_size*(struct tep_handle pass:[*]_tep_, int _long_size_);
--
DESCRIPTION
-----------
The _tep_get_long_size()_ function returns the size of a long integer on the machine,
where the trace is generated. The _tep_ argument is trace event parser context.
The _tep_set_long_size()_ function sets the size of a long integer on the machine,
where the trace is generated. The _tep_ argument is trace event parser context.
The _long_size_ is the size of a long integer, in bytes.
RETURN VALUE
------------
The _tep_get_long_size()_ function returns the size of a long integer on the machine,
where the trace is generated, in bytes.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
tep_set_long_size(tep, 4);
...
int long_size = tep_get_long_size(tep);
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-page_size.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_get_page_size, tep_set_page_size - Get / set the size of a memory page on
the machine, where the trace is generated
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
int *tep_get_page_size*(struct tep_handle pass:[*]_tep_);
void *tep_set_page_size*(struct tep_handle pass:[*]_tep_, int _page_size_);
--
DESCRIPTION
-----------
The _tep_get_page_size()_ function returns the size of a memory page on
the machine, where the trace is generated. The _tep_ argument is trace
event parser context.
The _tep_set_page_size()_ function stores in the _tep_ context the size of a
memory page on the machine, where the trace is generated.
The _tep_ argument is trace event parser context.
The _page_size_ argument is the size of a memory page, in bytes.
RETURN VALUE
------------
The _tep_get_page_size()_ function returns size of the memory page, in bytes.
EXAMPLE
-------
[source,c]
--
#include <unistd.h>
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
int page_size = getpagesize();
tep_set_page_size(tep, page_size);
printf("The page size for this machine is %d\n", tep_get_page_size(tep));
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-parse_event.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_parse_event, tep_parse_format - Parse the event format information
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
enum tep_errno *tep_parse_event*(struct tep_handle pass:[*]_tep_, const char pass:[*]_buf_, unsigned long _size_, const char pass:[*]_sys_);
enum tep_errno *tep_parse_format*(struct tep_handle pass:[*]_tep_, struct tep_event pass:[*]pass:[*]_eventp_, const char pass:[*]_buf_, unsigned long _size_, const char pass:[*]_sys_);
--
DESCRIPTION
-----------
The _tep_parse_event()_ function parses the event format and creates an event
structure to quickly parse raw data for a given event. The _tep_ argument is
the trace event parser context. The created event structure is stored in the
_tep_ context. The _buf_ argument is a buffer with _size_, where the event
format data is. The event format data can be taken from
tracefs/events/.../.../format files. The _sys_ argument is the system of
the event.
The _tep_parse_format()_ function does the same as _tep_parse_event()_. The only
difference is in the extra _eventp_ argument, where the newly created event
structure is returned.
RETURN VALUE
------------
Both _tep_parse_event()_ and _tep_parse_format()_ functions return 0 on success,
or TEP_ERRNO__... in case of an error.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
char *buf;
int size;
struct tep_event *event = NULL;
buf = read_file("/sys/kernel/tracing/events/ftrace/print/format", &size);
if (tep_parse_event(tep, buf, size, "ftrace") != 0) {
/* Failed to parse the ftrace print format */
}
if (tep_parse_format(tep, &event, buf, size, "ftrace") != 0) {
/* Failed to parse the ftrace print format */
}
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-parse_head.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_parse_header_page - Parses the data stored in the header page.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
int *tep_parse_header_page*(struct tep_handle pass:[*]_tep_, char pass:[*]_buf_, unsigned long _size_, int _long_size_);
--
DESCRIPTION
-----------
The _tep_parse_header_page()_ function parses the header page data from _buf_,
and initializes the _tep_, trace event parser context, with it. The buffer
_buf_ is with _size_, and is supposed to be copied from
tracefs/events/header_page.
Some old kernels do not have header page info, in this case the
_tep_parse_header_page()_ function can be called with _size_ equal to 0. The
_tep_ context is initialized with default values. The _long_size_ can be used in
this use case, to set the size of a long integer to be used.
RETURN VALUE
------------
The _tep_parse_header_page()_ function returns 0 in case of success, or -1
in case of an error.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
char *buf;
int size;
buf = read_file("/sys/kernel/tracing/events/header_page", &size);
if (tep_parse_header_page(tep, buf, size, sizeof(unsigned long)) != 0) {
/* Failed to parse the header page */
}
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-plugins.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_load_plugins, tep_unload_plugins, tep_load_plugins_hook - Load / unload traceevent plugins.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
struct tep_plugin_list pass:[*]*tep_load_plugins*(struct tep_handle pass:[*]_tep_);
void *tep_unload_plugins*(struct tep_plugin_list pass:[*]_plugin_list_, struct tep_handle pass:[*]_tep_);
void *tep_load_plugins_hook*(struct tep_handle pass:[*]_tep_, const char pass:[*]_suffix_,
void (pass:[*]_load_plugin_)(struct tep_handle pass:[*]tep,
const char pass:[*]path,
const char pass:[*]name,
void pass:[*]data),
void pass:[*]_data_);
--
DESCRIPTION
-----------
The _tep_load_plugins()_ function loads all plugins, located in the plugin
directories. The _tep_ argument is trace event parser context.
The plugin directories are :
[verse]
--
- Directories, specified in _tep_->plugins_dir with priority TEP_PLUGIN_FIRST
- System's plugin directory, defined at the library compile time. It
depends on the library installation prefix and usually is
_(install_preffix)/lib/traceevent/plugins_
- Directory, defined by the environment variable _TRACEEVENT_PLUGIN_DIR_
- User's plugin directory, located at _~/.local/lib/traceevent/plugins_
- Directories, specified in _tep_->plugins_dir with priority TEP_PLUGIN_LAST
--
Loading of plugins can be controlled by the _tep_flags_, using the
_tep_set_flag()_ API:
[verse]
--
_TEP_DISABLE_SYS_PLUGINS_ - do not load plugins, located in
the system's plugin directory.
_TEP_DISABLE_PLUGINS_ - do not load any plugins.
--
The _tep_set_flag()_ API needs to be called before _tep_load_plugins()_, if
loading of all plugins is not the desired case.
The _tep_unload_plugins()_ function unloads the plugins, previously loaded by
_tep_load_plugins()_. The _tep_ argument is trace event parser context. The
_plugin_list_ is the list of loaded plugins, returned by
the _tep_load_plugins()_ function.
The _tep_load_plugins_hook_ function walks through all directories with plugins
and calls user specified _load_plugin()_ hook for each plugin file. Only files
with given _suffix_ are considered to be plugins. The _data_ is a user specified
context, passed to _load_plugin()_. Directories and the walk order are the same
as in _tep_load_plugins()_ API.
RETURN VALUE
------------
The _tep_load_plugins()_ function returns a list of successfully loaded plugins,
or NULL in case no plugins are loaded.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
struct tep_plugin_list *plugins = tep_load_plugins(tep);
if (plugins == NULL) {
/* no plugins are loaded */
}
...
tep_unload_plugins(plugins, tep);
...
void print_plugin(struct tep_handle *tep, const char *path,
const char *name, void *data)
{
pritnf("Found libtraceevent plugin %s/%s\n", path, name);
}
...
tep_load_plugins_hook(tep, ".so", print_plugin, NULL);
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_, _tep_set_flag(3)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-record_parse.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_data_type, tep_data_pid,tep_data_preempt_count, tep_data_flags -
Extract common fields from a record.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
enum *trace_flag_type* {
_TRACE_FLAG_IRQS_OFF_,
_TRACE_FLAG_IRQS_NOSUPPORT_,
_TRACE_FLAG_NEED_RESCHED_,
_TRACE_FLAG_HARDIRQ_,
_TRACE_FLAG_SOFTIRQ_,
};
int *tep_data_type*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
int *tep_data_pid*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
int *tep_data_preempt_count*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
int *tep_data_flags*(struct tep_handle pass:[*]_tep_, struct tep_record pass:[*]_rec_);
--
DESCRIPTION
-----------
This set of functions can be used to extract common fields from a record.
The _tep_data_type()_ function gets the event id from the record _rec_.
It reads the "common_type" field. The _tep_ argument is the trace event parser
context.
The _tep_data_pid()_ function gets the process id from the record _rec_.
It reads the "common_pid" field. The _tep_ argument is the trace event parser
context.
The _tep_data_preempt_count()_ function gets the preemption count from the
record _rec_. It reads the "common_preempt_count" field. The _tep_ argument is
the trace event parser context.
The _tep_data_flags()_ function gets the latency flags from the record _rec_.
It reads the "common_flags" field. The _tep_ argument is the trace event parser
context. Supported latency flags are:
[verse]
--
_TRACE_FLAG_IRQS_OFF_, Interrupts are disabled.
_TRACE_FLAG_IRQS_NOSUPPORT_, Reading IRQ flag is not supported by the architecture.
_TRACE_FLAG_NEED_RESCHED_, Task needs rescheduling.
_TRACE_FLAG_HARDIRQ_, Hard IRQ is running.
_TRACE_FLAG_SOFTIRQ_, Soft IRQ is running.
--
RETURN VALUE
------------
The _tep_data_type()_ function returns an integer, representing the event id.
The _tep_data_pid()_ function returns an integer, representing the process id
The _tep_data_preempt_count()_ function returns an integer, representing the
preemption count.
The _tep_data_flags()_ function returns an integer, representing the latency
flags. Look at the _trace_flag_type_ enum for supported flags.
All these functions in case of an error return a negative integer.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
void process_record(struct tep_record *record)
{
int data;
data = tep_data_type(tep, record);
if (data >= 0) {
/* Got the ID of the event */
}
data = tep_data_pid(tep, record);
if (data >= 0) {
/* Got the process ID */
}
data = tep_data_preempt_count(tep, record);
if (data >= 0) {
/* Got the preemption count */
}
data = tep_data_flags(tep, record);
if (data >= 0) {
/* Got the latency flags */
}
}
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-reg_event_handler.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_register_event_handler, tep_unregister_event_handler - Register /
unregisters a callback function to parse an event information.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
enum *tep_reg_handler* {
_TEP_REGISTER_SUCCESS_,
_TEP_REGISTER_SUCCESS_OVERWRITE_,
};
int *tep_register_event_handler*(struct tep_handle pass:[*]_tep_, int _id_, const char pass:[*]_sys_name_, const char pass:[*]_event_name_, tep_event_handler_func _func_, void pass:[*]_context_);
int *tep_unregister_event_handler*(struct tep_handle pass:[*]tep, int id, const char pass:[*]sys_name, const char pass:[*]event_name, tep_event_handler_func func, void pass:[*]_context_);
typedef int (*pass:[*]tep_event_handler_func*)(struct trace_seq pass:[*]s, struct tep_record pass:[*]record, struct tep_event pass:[*]event, void pass:[*]context);
--
DESCRIPTION
-----------
The _tep_register_event_handler()_ function registers a handler function,
which is going to be called to parse the information for a given event.
The _tep_ argument is the trace event parser context. The _id_ argument is
the id of the event. The _sys_name_ argument is the name of the system,
the event belongs to. The _event_name_ argument is the name of the event.
If _id_ is >= 0, it is used to find the event, otherwise _sys_name_ and
_event_name_ are used. The _func_ is a pointer to the function, which is going
to be called to parse the event information. The _context_ argument is a pointer
to the context data, which will be passed to the _func_. If a handler function
for the same event is already registered, it will be overridden with the new
one. This mechanism allows a developer to override the parsing of a given event.
If for some reason the default print format is not sufficient, the developer
can register a function for an event to be used to parse the data instead.
The _tep_unregister_event_handler()_ function unregisters the handler function,
previously registered with _tep_register_event_handler()_. The _tep_ argument
is the trace event parser context. The _id_, _sys_name_, _event_name_, _func_,
and _context_ are the same arguments, as when the callback function _func_ was
registered.
The _tep_event_handler_func_ is the type of the custom event handler
function. The _s_ argument is the trace sequence, it can be used to create a
custom string, describing the event. A _record_ to get the event from is passed
as input parameter and also the _event_ - the handle to the record's event. The
_context_ is custom context, set when the custom event handler is registered.
RETURN VALUE
------------
The _tep_register_event_handler()_ function returns _TEP_REGISTER_SUCCESS_
if the new handler is registered successfully or
_TEP_REGISTER_SUCCESS_OVERWRITE_ if an existing handler is overwritten.
If there is not enough memory to complete the registration,
TEP_ERRNO__MEM_ALLOC_FAILED is returned.
The _tep_unregister_event_handler()_ function returns 0 if _func_ was removed
successful or, -1 if the event was not found.
The _tep_event_handler_func_ should return -1 in case of an error,
or 0 otherwise.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
#include <trace-seq.h>
...
struct tep_handle *tep = tep_alloc();
...
int timer_expire_handler(struct trace_seq *s, struct tep_record *record,
struct tep_event *event, void *context)
{
trace_seq_printf(s, "hrtimer=");
if (tep_print_num_field(s, "0x%llx", event, "timer", record, 0) == -1)
tep_print_num_field(s, "0x%llx", event, "hrtimer", record, 1);
trace_seq_printf(s, " now=");
tep_print_num_field(s, "%llu", event, "now", record, 1);
tep_print_func_field(s, " function=%s", event, "function", record, 0);
return 0;
}
...
int ret;
ret = tep_register_event_handler(tep, -1, "timer", "hrtimer_expire_entry",
timer_expire_handler, NULL);
if (ret < 0) {
char buf[32];
tep_strerror(tep, ret, buf, 32)
printf("Failed to register handler for hrtimer_expire_entry: %s\n", buf);
} else {
switch (ret) {
case TEP_REGISTER_SUCCESS:
printf ("Registered handler for hrtimer_expire_entry\n");
break;
case TEP_REGISTER_SUCCESS_OVERWRITE:
printf ("Overwrote handler for hrtimer_expire_entry\n");
break;
}
}
...
ret = tep_unregister_event_handler(tep, -1, "timer", "hrtimer_expire_entry",
timer_expire_handler, NULL);
if ( ret )
printf ("Failed to unregister handler for hrtimer_expire_entry\n");
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*trace-seq.h*
Header file to include in order to have access to trace sequences
related APIs. Trace sequences are used to allow a function to call
several other functions to create a string of data to use.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-reg_print_func.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_register_print_function,tep_unregister_print_function -
Registers / Unregisters a helper function.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
enum *tep_func_arg_type* {
TEP_FUNC_ARG_VOID,
TEP_FUNC_ARG_INT,
TEP_FUNC_ARG_LONG,
TEP_FUNC_ARG_STRING,
TEP_FUNC_ARG_PTR,
TEP_FUNC_ARG_MAX_TYPES
};
typedef unsigned long long (*pass:[*]tep_func_handler*)(struct trace_seq pass:[*]s, unsigned long long pass:[*]args);
int *tep_register_print_function*(struct tep_handle pass:[*]_tep_, tep_func_handler _func_, enum tep_func_arg_type _ret_type_, char pass:[*]_name_, _..._);
int *tep_unregister_print_function*(struct tep_handle pass:[*]_tep_, tep_func_handler _func_, char pass:[*]_name_);
--
DESCRIPTION
-----------
Some events may have helper functions in the print format arguments.
This allows a plugin to dynamically create a way to process one of
these functions.
The _tep_register_print_function()_ registers such helper function. The _tep_
argument is the trace event parser context. The _func_ argument is a pointer
to the helper function. The _ret_type_ argument is the return type of the
helper function, value from the _tep_func_arg_type_ enum. The _name_ is the name
of the helper function, as seen in the print format arguments. The _..._ is a
variable list of _tep_func_arg_type_ enums, the _func_ function arguments.
This list must end with _TEP_FUNC_ARG_VOID_. See 'EXAMPLE' section.
The _tep_unregister_print_function()_ unregisters a helper function, previously
registered with _tep_register_print_function()_. The _tep_ argument is the
trace event parser context. The _func_ and _name_ arguments are the same, used
when the helper function was registered.
The _tep_func_handler_ is the type of the helper function. The _s_ argument is
the trace sequence, it can be used to create a custom string.
The _args_ is a list of arguments, defined when the helper function was
registered.
RETURN VALUE
------------
The _tep_register_print_function()_ function returns 0 in case of success.
In case of an error, TEP_ERRNO_... code is returned.
The _tep_unregister_print_function()_ returns 0 in case of success, or -1 in
case of an error.
EXAMPLE
-------
Some events have internal functions calls, that appear in the print format
output. For example "tracefs/events/i915/g4x_wm/format" has:
[source,c]
--
print fmt: "pipe %c, frame=%u, scanline=%u, wm %d/%d/%d, sr %s/%d/%d/%d, hpll %s/%d/%d/%d, fbc %s",
((REC->pipe) + 'A'), REC->frame, REC->scanline, REC->primary,
REC->sprite, REC->cursor, yesno(REC->cxsr), REC->sr_plane,
REC->sr_cursor, REC->sr_fbc, yesno(REC->hpll), REC->hpll_plane,
REC->hpll_cursor, REC->hpll_fbc, yesno(REC->fbc)
--
Notice the call to function _yesno()_ in the print arguments. In the kernel
context, this function has the following implementation:
[source,c]
--
static const char *yesno(int x)
{
static const char *yes = "yes";
static const char *no = "no";
return x ? yes : no;
}
--
The user space event parser has no idea how to handle this _yesno()_ function.
The _tep_register_print_function()_ API can be used to register a user space
helper function, mapped to the kernel's _yesno()_:
[source,c]
--
#include <event-parse.h>
#include <trace-seq.h>
...
struct tep_handle *tep = tep_alloc();
...
static const char *yes_no_helper(int x)
{
return x ? "yes" : "no";
}
...
if ( tep_register_print_function(tep,
yes_no_helper,
TEP_FUNC_ARG_STRING,
"yesno",
TEP_FUNC_ARG_INT,
TEP_FUNC_ARG_VOID) != 0) {
/* Failed to register yes_no_helper function */
}
/*
Now, when the event parser encounters this yesno() function, it will know
how to handle it.
*/
...
if (tep_unregister_print_function(tep, yes_no_helper, "yesno") != 0) {
/* Failed to unregister yes_no_helper function */
}
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*trace-seq.h*
Header file to include in order to have access to trace sequences
related APIs. Trace sequences are used to allow a function to call
several other functions to create a string of data to use.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-set_flag.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_set_flag, tep_clear_flag, tep_test_flag -
Manage flags of trace event parser context.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
enum *tep_flag* {
_TEP_NSEC_OUTPUT_,
_TEP_DISABLE_SYS_PLUGINS_,
_TEP_DISABLE_PLUGINS_
};
void *tep_set_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flag_);
void *tep_clear_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flag_);
bool *tep_test_flag*(struct tep_handle pass:[*]_tep_, enum tep_flag _flag_);
--
DESCRIPTION
-----------
Trace event parser context flags are defined in *enum tep_flag*:
[verse]
--
_TEP_NSEC_OUTPUT_ - print event's timestamp in nano seconds, instead of micro seconds.
_TEP_DISABLE_SYS_PLUGINS_ - disable plugins, located in system's plugin
directory. This directory is defined at library compile
time, and usually depends on library installation
prefix: (install_preffix)/lib/traceevent/plugins
_TEP_DISABLE_PLUGINS_ - disable all library plugins:
- in system's plugin directory
- in directory, defined by the environment variable _TRACEEVENT_PLUGIN_DIR_
- in user's home directory, _~/.traceevent/plugins_
--
Note: plugin related flags must me set before calling _tep_load_plugins()_ API.
The _tep_set_flag()_ function sets _flag_ to _tep_ context.
The _tep_clear_flag()_ function clears _flag_ from _tep_ context.
The _tep_test_flag()_ function tests if _flag_ is set to _tep_ context.
RETURN VALUE
------------
_tep_test_flag()_ function returns true if _flag_ is set, false otherwise.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
/* Print timestamps in nanoseconds */
tep_set_flag(tep, TEP_NSEC_OUTPUT);
...
if (tep_test_flag(tep, TEP_NSEC_OUTPUT)) {
/* print timestamps in nanoseconds */
} else {
/* print timestamps in microseconds */
}
...
/* Print timestamps in microseconds */
tep_clear_flag(tep, TEP_NSEC_OUTPUT);
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-strerror.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
tep_strerror - Returns a string describing regular errno and tep error number.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
int *tep_strerror*(struct tep_handle pass:[*]_tep_, enum tep_errno _errnum_, char pass:[*]_buf_, size_t _buflen_);
--
DESCRIPTION
-----------
The _tep_strerror()_ function converts tep error number into a human
readable string.
The _tep_ argument is trace event parser context. The _errnum_ is a regular
errno, defined in errno.h, or a tep error number. The string, describing this
error number is copied in the _buf_ argument. The _buflen_ argument is
the size of the _buf_.
It as a thread safe wrapper around strerror_r(). The library function has two
different behaviors - POSIX and GNU specific. The _tep_strerror()_ API always
behaves as the POSIX version - the error string is copied in the user supplied
buffer.
RETURN VALUE
------------
The _tep_strerror()_ function returns 0, if a valid _errnum_ is passed and the
string is copied into _buf_. If _errnum_ is not a valid error number,
-1 is returned and _buf_ is not modified.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
...
struct tep_handle *tep = tep_alloc();
...
char buf[32];
char *pool = calloc(1, 128);
if (tep == NULL) {
tep_strerror(tep, TEP_ERRNO__MEM_ALLOC_FAILED, buf, 32);
printf ("The pool is not initialized, %s", buf);
}
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent-tseq.txt deleted 100644 → 0
View file @ 378ef0f5
libtraceevent(3)
================
NAME
----
trace_seq_init, trace_seq_destroy, trace_seq_reset, trace_seq_terminate,
trace_seq_putc, trace_seq_puts, trace_seq_printf, trace_seq_vprintf,
trace_seq_do_fprintf, trace_seq_do_printf -
Initialize / destroy a trace sequence.
SYNOPSIS
--------
[verse]
--
*#include <event-parse.h>*
*#include <trace-seq.h>*
void *trace_seq_init*(struct trace_seq pass:[*]_s_);
void *trace_seq_destroy*(struct trace_seq pass:[*]_s_);
void *trace_seq_reset*(struct trace_seq pass:[*]_s_);
void *trace_seq_terminate*(struct trace_seq pass:[*]_s_);
int *trace_seq_putc*(struct trace_seq pass:[*]_s_, unsigned char _c_);
int *trace_seq_puts*(struct trace_seq pass:[*]_s_, const char pass:[*]_str_);
int *trace_seq_printf*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, _..._);
int *trace_seq_vprintf*(struct trace_seq pass:[*]_s_, const char pass:[*]_fmt_, va_list _args_);
int *trace_seq_do_printf*(struct trace_seq pass:[*]_s_);
int *trace_seq_do_fprintf*(struct trace_seq pass:[*]_s_, FILE pass:[*]_fp_);
--
DESCRIPTION
-----------
Trace sequences are used to allow a function to call several other functions
to create a string of data to use.
The _trace_seq_init()_ function initializes the trace sequence _s_.
The _trace_seq_destroy()_ function destroys the trace sequence _s_ and frees
all its resources that it had used.
The _trace_seq_reset()_ function re-initializes the trace sequence _s_. All
characters already written in _s_ will be deleted.
The _trace_seq_terminate()_ function terminates the trace sequence _s_. It puts
the null character pass:['\0'] at the end of the buffer.
The _trace_seq_putc()_ function puts a single character _c_ in the trace
sequence _s_.
The _trace_seq_puts()_ function puts a NULL terminated string _str_ in the
trace sequence _s_.
The _trace_seq_printf()_ function puts a formated string _fmt _with
variable arguments _..._ in the trace sequence _s_.
The _trace_seq_vprintf()_ function puts a formated string _fmt _with
list of arguments _args_ in the trace sequence _s_.
The _trace_seq_do_printf()_ function prints the buffer of trace sequence _s_ to
the standard output stdout.
The _trace_seq_do_fprintf()_ function prints the buffer of trace sequence _s_
to the given file _fp_.
RETURN VALUE
------------
Both _trace_seq_putc()_ and _trace_seq_puts()_ functions return the number of
characters put in the trace sequence, or 0 in case of an error
Both _trace_seq_printf()_ and _trace_seq_vprintf()_ functions return 0 if the
trace oversizes the buffer's free space, the number of characters printed, or
a negative value in case of an error.
Both _trace_seq_do_printf()_ and _trace_seq_do_fprintf()_ functions return the
number of printed characters, or -1 in case of an error.
EXAMPLE
-------
[source,c]
--
#include <event-parse.h>
#include <trace-seq.h>
...
struct trace_seq seq;
trace_seq_init(&seq);
...
void foo_seq_print(struct trace_seq *tseq, char *format, ...)
{
va_list ap;
va_start(ap, format);
if (trace_seq_vprintf(tseq, format, ap) <= 0) {
/* Failed to print in the trace sequence */
}
va_end(ap);
}
trace_seq_reset(&seq);
char *str = " MAN page example";
if (trace_seq_puts(&seq, str) != strlen(str)) {
/* Failed to put str in the trace sequence */
}
if (trace_seq_putc(&seq, ':') != 1) {
/* Failed to put ':' in the trace sequence */
}
if (trace_seq_printf(&seq, " trace sequence: %d", 1) <= 0) {
/* Failed to print in the trace sequence */
}
foo_seq_print( &seq, " %d\n", 2);
trace_seq_terminate(&seq);
...
if (trace_seq_do_printf(&seq) < 0 ) {
/* Failed to print the sequence buffer to the standard output */
}
FILE *fp = fopen("trace.txt", "w");
if (trace_seq_do_fprintf(&seq, fp) < 0 ) [
/* Failed to print the sequence buffer to the trace.txt file */
}
trace_seq_destroy(&seq);
...
--
FILES
-----
[verse]
--
*event-parse.h*
Header file to include in order to have access to the library APIs.
*trace-seq.h*
Header file to include in order to have access to trace sequences related APIs.
*-ltraceevent*
Linker switch to add when building a program that uses the library.
--
SEE ALSO
--------
_libtraceevent(3)_, _trace-cmd(1)_
AUTHOR
------
[verse]
--
*Steven Rostedt* <rostedt@goodmis.org>, author of *libtraceevent*.
*Tzvetomir Stoyanov* <tz.stoyanov@gmail.com>, author of this man page.
--
REPORTING BUGS
--------------
Report bugs to <linux-trace-devel@vger.kernel.org>
LICENSE
-------
libtraceevent is Free Software licensed under the GNU LGPL 2.1
RESOURCES
---------
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tools/lib/traceevent/Documentation/libtraceevent.txt deleted 100644 → 0
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<xsl:import href="manpage-base.xsl"/>
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needed for docbook-xsl 1.72.0 -->
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<xsl:param name="git.docbook.dot" >&#x2302;</xsl:param>
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<xsl:param name="refentry.meta.get.quietly" select="1"/>
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git.docbook.backslash and git.docbook.dot params
must be supplied by another XSL file or other means -->
<xsl:template match="co">
<xsl:value-of select="concat(
$git.docbook.backslash,'fB(',
substring-after(@id,'-'),')',
$git.docbook.backslash,'fR')"/>
</xsl:template>
<xsl:template match="calloutlist">
<xsl:value-of select="$git.docbook.dot"/>
<xsl:text>sp&#10;</xsl:text>
<xsl:apply-templates/>
<xsl:text>&#10;</xsl:text>
</xsl:template>
<xsl:template match="callout">
<xsl:value-of select="concat(
$git.docbook.backslash,'fB',
substring-after(@arearefs,'-'),
'. ',$git.docbook.backslash,'fR')"/>
<xsl:apply-templates/>
<xsl:value-of select="$git.docbook.dot"/>
<xsl:text>br&#10;</xsl:text>
</xsl:template>
</xsl:stylesheet>
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version="1.0">
<!-- render literal text as bold (instead of plain or monospace);
this makes literal text easier to distinguish in manpages
viewed on a tty -->
<xsl:template match="literal">
<xsl:value-of select="$git.docbook.backslash"/>
<xsl:text>fB</xsl:text>
<xsl:apply-templates/>
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version="1.0">
<xsl:import href="manpage-base.xsl"/>
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<xsl:param name="git.docbook.backslash">\</xsl:param>
<xsl:param name="git.docbook.dot" >.</xsl:param>
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versions of docbook-xsl -->
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
version="1.0">
<!-- attempt to work around spurious .sp at the tail of the line
that some versions of docbook stylesheets seem to add -->
<xsl:template match="simpara">
<xsl:variable name="content">
<xsl:apply-templates/>
</xsl:variable>
<xsl:value-of select="normalize-space($content)"/>
<xsl:if test="not(ancestor::authorblurb) and
not(ancestor::personblurb)">
<xsl:text>&#10;&#10;</xsl:text>
</xsl:if>
</xsl:template>
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# SPDX-License-Identifier: GPL-2.0
# trace-cmd version
EP_VERSION = 1
EP_PATCHLEVEL = 1
EP_EXTRAVERSION = 0
# file format version
FILE_VERSION = 6
MAKEFLAGS += --no-print-directory
# Makefiles suck: This macro sets a default value of $(2) for the
# variable named by $(1), unless the variable has been set by
# environment or command line. This is necessary for CC and AR
# because make sets default values, so the simpler ?= approach
# won't work as expected.
define allow-override
$(if $(or $(findstring environment,$(origin $(1))),\
$(findstring command line,$(origin $(1)))),,\
$(eval $(1) = $(2)))
endef
# Allow setting CC and AR, or setting CROSS_COMPILE as a prefix.
$(call allow-override,CC,$(CROSS_COMPILE)gcc)
$(call allow-override,AR,$(CROSS_COMPILE)ar)
$(call allow-override,NM,$(CROSS_COMPILE)nm)
$(call allow-override,PKG_CONFIG,pkg-config)
EXT = -std=gnu99
INSTALL = install
# Use DESTDIR for installing into a different root directory.
# This is useful for building a package. The program will be
# installed in this directory as if it was the root directory.
# Then the build tool can move it later.
DESTDIR ?=
DESTDIR_SQ = '$(subst ','\'',$(DESTDIR))'
LP64 := $(shell echo __LP64__ | ${CC} ${CFLAGS} -E -x c - | tail -n 1)
ifeq ($(LP64), 1)
libdir_relative_temp = lib64
else
libdir_relative_temp = lib
endif
libdir_relative ?= $(libdir_relative_temp)
prefix ?= /usr/local
libdir = $(prefix)/$(libdir_relative)
man_dir = $(prefix)/share/man
man_dir_SQ = '$(subst ','\'',$(man_dir))'
pkgconfig_dir ?= $(word 1,$(shell $(PKG_CONFIG) \
--variable pc_path pkg-config | tr ":" " "))
includedir_relative = traceevent
includedir = $(prefix)/include/$(includedir_relative)
includedir_SQ = '$(subst ','\'',$(includedir))'
export man_dir man_dir_SQ INSTALL
export DESTDIR DESTDIR_SQ
export EVENT_PARSE_VERSION
include ../../scripts/Makefile.include
# copy a bit from Linux kbuild
ifeq ("$(origin V)", "command line")
VERBOSE = $(V)
endif
ifndef VERBOSE
VERBOSE = 0
endif
ifeq ($(srctree),)
srctree := $(patsubst %/,%,$(dir $(CURDIR)))
srctree := $(patsubst %/,%,$(dir $(srctree)))
srctree := $(patsubst %/,%,$(dir $(srctree)))
#$(info Determined 'srctree' to be $(srctree))
endif
export prefix libdir src obj
# Shell quotes
libdir_SQ = $(subst ','\'',$(libdir))
libdir_relative_SQ = $(subst ','\'',$(libdir_relative))
CONFIG_INCLUDES =
CONFIG_LIBS =
CONFIG_FLAGS =
VERSION = $(EP_VERSION)
PATCHLEVEL = $(EP_PATCHLEVEL)
EXTRAVERSION = $(EP_EXTRAVERSION)
OBJ = $@
N =
EVENT_PARSE_VERSION = $(EP_VERSION).$(EP_PATCHLEVEL).$(EP_EXTRAVERSION)
LIB_TARGET = libtraceevent.a libtraceevent.so.$(EVENT_PARSE_VERSION)
LIB_INSTALL = libtraceevent.a libtraceevent.so*
LIB_INSTALL := $(addprefix $(OUTPUT),$(LIB_INSTALL))
INCLUDES = -I. -I $(srctree)/tools/include $(CONFIG_INCLUDES)
# Set compile option CFLAGS
ifdef EXTRA_CFLAGS
CFLAGS := $(EXTRA_CFLAGS)
else
CFLAGS := -g -Wall
endif
# Append required CFLAGS
override CFLAGS += -fPIC
override CFLAGS += $(CONFIG_FLAGS) $(INCLUDES) $(PLUGIN_DIR_SQ)
override CFLAGS += $(udis86-flags) -D_GNU_SOURCE
ifeq ($(VERBOSE),1)
Q =
else
Q = @
endif
# Disable command line variables (CFLAGS) override from top
# level Makefile (perf), otherwise build Makefile will get
# the same command line setup.
MAKEOVERRIDES=
export srctree OUTPUT CC LD CFLAGS V
build := -f $(srctree)/tools/build/Makefile.build dir=. obj
TE_IN := $(OUTPUT)libtraceevent-in.o
LIB_TARGET := $(addprefix $(OUTPUT),$(LIB_TARGET))
CMD_TARGETS = $(LIB_TARGET)
TARGETS = $(CMD_TARGETS)
all: all_cmd plugins
all_cmd: $(CMD_TARGETS)
$(TE_IN): force
$(Q)$(MAKE) $(build)=libtraceevent
$(OUTPUT)libtraceevent.so.$(EVENT_PARSE_VERSION): $(TE_IN)
$(QUIET_LINK)$(CC) --shared $(LDFLAGS) $^ -Wl,-soname,libtraceevent.so.$(EP_VERSION) -o $@
@ln -sf $(@F) $(OUTPUT)libtraceevent.so
@ln -sf $(@F) $(OUTPUT)libtraceevent.so.$(EP_VERSION)
$(OUTPUT)libtraceevent.a: $(TE_IN)
$(QUIET_LINK)$(RM) $@; $(AR) rcs $@ $^
$(OUTPUT)%.so: $(OUTPUT)%-in.o
$(QUIET_LINK)$(CC) $(CFLAGS) -shared $(LDFLAGS) -nostartfiles -o $@ $^
define make_version.h
(echo '/* This file is automatically generated. Do not modify. */'; \
echo \#define VERSION_CODE $(shell \
expr $(VERSION) \* 256 + $(PATCHLEVEL)); \
echo '#define EXTRAVERSION ' $(EXTRAVERSION); \
echo '#define VERSION_STRING "'$(VERSION).$(PATCHLEVEL).$(EXTRAVERSION)'"'; \
echo '#define FILE_VERSION '$(FILE_VERSION); \
) > $1
endef
define update_version.h
($(call make_version.h, $@.tmp); \
if [ -r $@ ] && cmp -s $@ $@.tmp; then \
rm -f $@.tmp; \
else \
echo ' UPDATE $@'; \
mv -f $@.tmp $@; \
fi);
endef
ep_version.h: force
$(Q)$(N)$(call update_version.h)
VERSION_FILES = ep_version.h
define update_dir
(echo $1 > $@.tmp; \
if [ -r $@ ] && cmp -s $@ $@.tmp; then \
rm -f $@.tmp; \
else \
echo ' UPDATE $@'; \
mv -f $@.tmp $@; \
fi);
endef
tags: force
$(RM) tags
find . -name '*.[ch]' | xargs ctags --extra=+f --c-kinds=+px \
--regex-c++='/_PE\(([^,)]*).*/TEP_ERRNO__\1/'
TAGS: force
$(RM) TAGS
find . -name '*.[ch]' | xargs etags \
--regex='/_PE(\([^,)]*\).*/TEP_ERRNO__\1/'
define do_install_mkdir
if [ ! -d '$(DESTDIR_SQ)$1' ]; then \
$(INSTALL) -d -m 755 '$(DESTDIR_SQ)$1'; \
fi
endef
define do_install
$(call do_install_mkdir,$2); \
$(INSTALL) $(if $3,-m $3,) $1 '$(DESTDIR_SQ)$2'
endef
PKG_CONFIG_SOURCE_FILE = libtraceevent.pc
PKG_CONFIG_FILE := $(addprefix $(OUTPUT),$(PKG_CONFIG_SOURCE_FILE))
define do_install_pkgconfig_file
if [ -n "${pkgconfig_dir}" ]; then \
cp -f ${PKG_CONFIG_SOURCE_FILE}.template ${PKG_CONFIG_FILE}; \
sed -i "s|INSTALL_PREFIX|${1}|g" ${PKG_CONFIG_FILE}; \
sed -i "s|LIB_VERSION|${EVENT_PARSE_VERSION}|g" ${PKG_CONFIG_FILE}; \
sed -i "s|LIB_DIR|${libdir}|g" ${PKG_CONFIG_FILE}; \
sed -i "s|HEADER_DIR|$(includedir)|g" ${PKG_CONFIG_FILE}; \
$(call do_install,$(PKG_CONFIG_FILE),$(pkgconfig_dir),644); \
else \
(echo Failed to locate pkg-config directory) 1>&2; \
fi
endef
install_lib: all_cmd install_plugins install_headers install_pkgconfig
$(call QUIET_INSTALL, $(LIB_TARGET)) \
$(call do_install_mkdir,$(libdir_SQ)); \
cp -fpR $(LIB_INSTALL) $(DESTDIR)$(libdir_SQ)
install_pkgconfig:
$(call QUIET_INSTALL, $(PKG_CONFIG_FILE)) \
$(call do_install_pkgconfig_file,$(prefix))
install_headers:
$(call QUIET_INSTALL, traceevent_headers) \
$(call do_install,event-parse.h,$(includedir_SQ),644); \
$(call do_install,event-utils.h,$(includedir_SQ),644); \
$(call do_install,trace-seq.h,$(includedir_SQ),644); \
$(call do_install,kbuffer.h,$(includedir_SQ),644);
install: install_lib
clean: clean_plugins
$(call QUIET_CLEAN, libtraceevent) \
$(RM) *.o *~ $(TARGETS) *.a *.so $(VERSION_FILES) .*.d .*.cmd; \
$(RM) TRACEEVENT-CFLAGS tags TAGS; \
$(RM) $(PKG_CONFIG_FILE)
PHONY += doc
doc:
$(call descend,Documentation)
PHONY += doc-clean
doc-clean:
$(call descend,Documentation,clean)
PHONY += doc-install
doc-install:
$(call descend,Documentation,install)
PHONY += doc-uninstall
doc-uninstall:
$(call descend,Documentation,uninstall)
PHONY += help
help:
@echo 'Possible targets:'
@echo''
@echo ' all - default, compile the library and the'\
'plugins'
@echo ' plugins - compile the plugins'
@echo ' install - install the library, the plugins,'\
'the header and pkgconfig files'
@echo ' clean - clean the library and the plugins object files'
@echo ' doc - compile the documentation files - man'\
'and html pages, in the Documentation directory'
@echo ' doc-clean - clean the documentation files'
@echo ' doc-install - install the man pages'
@echo ' doc-uninstall - uninstall the man pages'
@echo''
PHONY += plugins
plugins:
$(call descend,plugins)
PHONY += install_plugins
install_plugins:
$(call descend,plugins,install)
PHONY += clean_plugins
clean_plugins:
$(call descend,plugins,clean)
force:
# Declare the contents of the .PHONY variable as phony. We keep that
# information in a variable so we can use it in if_changed and friends.
.PHONY: $(PHONY)
tools/lib/traceevent/event-parse-api.c deleted 100644 → 0
View file @ 378ef0f5
// SPDX-License-Identifier: LGPL-2.1
/*
* Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
*
*/
#include "event-parse.h"
#include "event-parse-local.h"
#include "event-utils.h"
/**
* tep_get_event - returns the event with the given index
* @tep: a handle to the tep_handle
* @index: index of the requested event, in the range 0 .. nr_events
*
* This returns pointer to the element of the events array with the given index
* If @tep is NULL, or @index is not in the range 0 .. nr_events, NULL is returned.
*/
struct tep_event *tep_get_event(struct tep_handle *tep, int index)
{
if (tep && tep->events && index < tep->nr_events)
return tep->events[index];
return NULL;
}
/**
* tep_get_first_event - returns the first event in the events array
* @tep: a handle to the tep_handle
*
* This returns pointer to the first element of the events array
* If @tep is NULL, NULL is returned.
*/
struct tep_event *tep_get_first_event(struct tep_handle *tep)
{
return tep_get_event(tep, 0);
}
/**
* tep_get_events_count - get the number of defined events
* @tep: a handle to the tep_handle
*
* This returns number of elements in event array
* If @tep is NULL, 0 is returned.
*/
int tep_get_events_count(struct tep_handle *tep)
{
if (tep)
return tep->nr_events;
return 0;
}
/**
* tep_set_flag - set event parser flag
* @tep: a handle to the tep_handle
* @flag: flag, or combination of flags to be set
* can be any combination from enum tep_flag
*
* This sets a flag or combination of flags from enum tep_flag
*/
void tep_set_flag(struct tep_handle *tep, int flag)
{
if (tep)
tep->flags |= flag;
}
/**
* tep_clear_flag - clear event parser flag
* @tep: a handle to the tep_handle
* @flag: flag to be cleared
*
* This clears a tep flag
*/
void tep_clear_flag(struct tep_handle *tep, enum tep_flag flag)
{
if (tep)
tep->flags &= ~flag;
}
/**
* tep_test_flag - check the state of event parser flag
* @tep: a handle to the tep_handle
* @flag: flag to be checked
*
* This returns the state of the requested tep flag.
* Returns: true if the flag is set, false otherwise.
*/
bool tep_test_flag(struct tep_handle *tep, enum tep_flag flag)
{
if (tep)
return tep->flags & flag;
return false;
}
__hidden unsigned short data2host2(struct tep_handle *tep, unsigned short data)
{
unsigned short swap;
if (!tep || tep->host_bigendian == tep->file_bigendian)
return data;
swap = ((data & 0xffULL) << 8) |
((data & (0xffULL << 8)) >> 8);
return swap;
}
__hidden unsigned int data2host4(struct tep_handle *tep, unsigned int data)
{
unsigned int swap;
if (!tep || tep->host_bigendian == tep->file_bigendian)
return data;
swap = ((data & 0xffULL) << 24) |
((data & (0xffULL << 8)) << 8) |
((data & (0xffULL << 16)) >> 8) |
((data & (0xffULL << 24)) >> 24);
return swap;
}
__hidden unsigned long long
data2host8(struct tep_handle *tep, unsigned long long data)
{
unsigned long long swap;
if (!tep || tep->host_bigendian == tep->file_bigendian)
return data;
swap = ((data & 0xffULL) << 56) |
((data & (0xffULL << 8)) << 40) |
((data & (0xffULL << 16)) << 24) |
((data & (0xffULL << 24)) << 8) |
((data & (0xffULL << 32)) >> 8) |
((data & (0xffULL << 40)) >> 24) |
((data & (0xffULL << 48)) >> 40) |
((data & (0xffULL << 56)) >> 56);
return swap;
}
/**
* tep_get_header_page_size - get size of the header page
* @tep: a handle to the tep_handle
*
* This returns size of the header page
* If @tep is NULL, 0 is returned.
*/
int tep_get_header_page_size(struct tep_handle *tep)
{
if (tep)
return tep->header_page_size_size;
return 0;
}
/**
* tep_get_header_timestamp_size - get size of the timestamp in the header page
* @tep: a handle to the tep_handle
*
* This returns size of the timestamp in the header page
* If @tep is NULL, 0 is returned.
*/
int tep_get_header_timestamp_size(struct tep_handle *tep)
{
if (tep)
return tep->header_page_ts_size;
return 0;
}
/**
* tep_get_cpus - get the number of CPUs
* @tep: a handle to the tep_handle
*
* This returns the number of CPUs
* If @tep is NULL, 0 is returned.
*/
int tep_get_cpus(struct tep_handle *tep)
{
if (tep)
return tep->cpus;
return 0;
}
/**
* tep_set_cpus - set the number of CPUs
* @tep: a handle to the tep_handle
*
* This sets the number of CPUs
*/
void tep_set_cpus(struct tep_handle *tep, int cpus)
{
if (tep)
tep->cpus = cpus;
}
/**
* tep_get_long_size - get the size of a long integer on the traced machine
* @tep: a handle to the tep_handle
*
* This returns the size of a long integer on the traced machine
* If @tep is NULL, 0 is returned.
*/
int tep_get_long_size(struct tep_handle *tep)
{
if (tep)
return tep->long_size;
return 0;
}
/**
* tep_set_long_size - set the size of a long integer on the traced machine
* @tep: a handle to the tep_handle
* @size: size, in bytes, of a long integer
*
* This sets the size of a long integer on the traced machine
*/
void tep_set_long_size(struct tep_handle *tep, int long_size)
{
if (tep)
tep->long_size = long_size;
}
/**
* tep_get_page_size - get the size of a memory page on the traced machine
* @tep: a handle to the tep_handle
*
* This returns the size of a memory page on the traced machine
* If @tep is NULL, 0 is returned.
*/
int tep_get_page_size(struct tep_handle *tep)
{
if (tep)
return tep->page_size;
return 0;
}
/**
* tep_set_page_size - set the size of a memory page on the traced machine
* @tep: a handle to the tep_handle
* @_page_size: size of a memory page, in bytes
*
* This sets the size of a memory page on the traced machine
*/
void tep_set_page_size(struct tep_handle *tep, int _page_size)
{
if (tep)
tep->page_size = _page_size;
}
/**
* tep_is_file_bigendian - return the endian of the file
* @tep: a handle to the tep_handle
*
* This returns true if the file is in big endian order
* If @tep is NULL, false is returned.
*/
bool tep_is_file_bigendian(struct tep_handle *tep)
{
if (tep)
return (tep->file_bigendian == TEP_BIG_ENDIAN);
return false;
}
/**
* tep_set_file_bigendian - set if the file is in big endian order
* @tep: a handle to the tep_handle
* @endian: non zero, if the file is in big endian order
*
* This sets if the file is in big endian order
*/
void tep_set_file_bigendian(struct tep_handle *tep, enum tep_endian endian)
{
if (tep)
tep->file_bigendian = endian;
}
/**
* tep_is_local_bigendian - return the endian of the saved local machine
* @tep: a handle to the tep_handle
*
* This returns true if the saved local machine in @tep is big endian.
* If @tep is NULL, false is returned.
*/
bool tep_is_local_bigendian(struct tep_handle *tep)
{
if (tep)
return (tep->host_bigendian == TEP_BIG_ENDIAN);
return 0;
}
/**
* tep_set_local_bigendian - set the stored local machine endian order
* @tep: a handle to the tep_handle
* @endian: non zero, if the local host has big endian order
*
* This sets the endian order for the local machine.
*/
void tep_set_local_bigendian(struct tep_handle *tep, enum tep_endian endian)
{
if (tep)
tep->host_bigendian = endian;
}
/**
* tep_is_old_format - get if an old kernel is used
* @tep: a handle to the tep_handle
*
* This returns true, if an old kernel is used to generate the tracing events or
* false if a new kernel is used. Old kernels did not have header page info.
* If @tep is NULL, false is returned.
*/
bool tep_is_old_format(struct tep_handle *tep)
{
if (tep)
return tep->old_format;
return false;
}
/**
* tep_set_test_filters - set a flag to test a filter string
* @tep: a handle to the tep_handle
* @test_filters: the new value of the test_filters flag
*
* This sets a flag to test a filter string. If this flag is set, when
* tep_filter_add_filter_str() API as called,it will print the filter string
* instead of adding it.
*/
void tep_set_test_filters(struct tep_handle *tep, int test_filters)
{
if (tep)
tep->test_filters = test_filters;
}
tools/lib/traceevent/event-parse-local.h deleted 100644 → 0
View file @ 378ef0f5
// SPDX-License-Identifier: LGPL-2.1
/*
* Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
*
*/
#ifndef _PARSE_EVENTS_INT_H
#define _PARSE_EVENTS_INT_H
struct tep_cmdline;
struct cmdline_list;
struct func_map;
struct func_list;
struct event_handler;
struct func_resolver;
struct tep_plugins_dir;
#define __hidden __attribute__((visibility ("hidden")))
struct tep_handle {
int ref_count;
int header_page_ts_offset;
int header_page_ts_size;
int header_page_size_offset;
int header_page_size_size;
int header_page_data_offset;
int header_page_data_size;
int header_page_overwrite;
enum tep_endian file_bigendian;
enum tep_endian host_bigendian;
int old_format;
int cpus;
int long_size;
int page_size;
struct tep_cmdline *cmdlines;
struct cmdline_list *cmdlist;
int cmdline_count;
struct func_map *func_map;
struct func_resolver *func_resolver;
struct func_list *funclist;
unsigned int func_count;
struct printk_map *printk_map;
struct printk_list *printklist;
unsigned int printk_count;
struct tep_event **events;
int nr_events;
struct tep_event **sort_events;
enum tep_event_sort_type last_type;
int type_offset;
int type_size;
int pid_offset;
int pid_size;
int pc_offset;
int pc_size;
int flags_offset;
int flags_size;
int ld_offset;
int ld_size;
int test_filters;
int flags;
struct tep_format_field *bprint_ip_field;
struct tep_format_field *bprint_fmt_field;
struct tep_format_field *bprint_buf_field;
struct event_handler *handlers;
struct tep_function_handler *func_handlers;
/* cache */
struct tep_event *last_event;
struct tep_plugins_dir *plugins_dir;
};
enum tep_print_parse_type {
PRINT_FMT_STRING,
PRINT_FMT_ARG_DIGIT,
PRINT_FMT_ARG_POINTER,
PRINT_FMT_ARG_STRING,
};
struct tep_print_parse {
struct tep_print_parse *next;
char *format;
int ls;
enum tep_print_parse_type type;
struct tep_print_arg *arg;
struct tep_print_arg *len_as_arg;
};
void free_tep_event(struct tep_event *event);
void free_tep_format_field(struct tep_format_field *field);
void free_tep_plugin_paths(struct tep_handle *tep);
unsigned short data2host2(struct tep_handle *tep, unsigned short data);
unsigned int data2host4(struct tep_handle *tep, unsigned int data);
unsigned long long data2host8(struct tep_handle *tep, unsigned long long data);
/* access to the internal parser */
int peek_char(void);
void init_input_buf(const char *buf, unsigned long long size);
unsigned long long get_input_buf_ptr(void);
const char *get_input_buf(void);
enum tep_event_type read_token(char **tok);
void free_token(char *tok);
#endif /* _PARSE_EVENTS_INT_H */
tools/lib/traceevent/event-parse.c deleted 100644 → 0
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tools/lib/traceevent/event-parse.h deleted 100644 → 0
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tools/lib/traceevent/event-utils.h deleted 100644 → 0
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/* SPDX-License-Identifier: LGPL-2.1 */
/*
* Copyright (C) 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
*
*/
#ifndef __UTIL_H
#define __UTIL_H
#include <ctype.h>
/* Can be overridden */
void warning(const char *fmt, ...);
void pr_stat(const char *fmt, ...);
void vpr_stat(const char *fmt, va_list ap);
/* Always available */
void __warning(const char *fmt, ...);
void __pr_stat(const char *fmt, ...);
void __vwarning(const char *fmt, ...);
void __vpr_stat(const char *fmt, ...);
#define min(x, y) ({ \
typeof(x) _min1 = (x); \
typeof(y) _min2 = (y); \
(void) (&_min1 == &_min2); \
_min1 < _min2 ? _min1 : _min2; })
static inline char *strim(char *string)
{
char *ret;
if (!string)
return NULL;
while (*string) {
if (!isspace(*string))
break;
string++;
}
ret = string;
string = ret + strlen(ret) - 1;
while (string > ret) {
if (!isspace(*string))
break;
string--;
}
string[1] = 0;
return ret;
}
static inline int has_text(const char *text)
{
if (!text)
return 0;
while (*text) {
if (!isspace(*text))
return 1;
text++;
}
return 0;
}
#endif
tools/lib/traceevent/kbuffer-parse.c deleted 100644 → 0
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tools/lib/traceevent/kbuffer.h deleted 100644 → 0
View file @ 378ef0f5
/* SPDX-License-Identifier: LGPL-2.1 */
/*
* Copyright (C) 2012 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
*
*/
#ifndef _KBUFFER_H
#define _KBUFFER_H
#ifndef TS_SHIFT
#define TS_SHIFT 27
#endif
enum kbuffer_endian {
KBUFFER_ENDIAN_BIG,
KBUFFER_ENDIAN_LITTLE,
};
enum kbuffer_long_size {
KBUFFER_LSIZE_4,
KBUFFER_LSIZE_8,
};
enum {
KBUFFER_TYPE_PADDING = 29,
KBUFFER_TYPE_TIME_EXTEND = 30,
KBUFFER_TYPE_TIME_STAMP = 31,
};
struct kbuffer;
struct kbuffer *kbuffer_alloc(enum kbuffer_long_size size, enum kbuffer_endian endian);
void kbuffer_free(struct kbuffer *kbuf);
int kbuffer_load_subbuffer(struct kbuffer *kbuf, void *subbuffer);
void *kbuffer_read_event(struct kbuffer *kbuf, unsigned long long *ts);
void *kbuffer_next_event(struct kbuffer *kbuf, unsigned long long *ts);
unsigned long long kbuffer_timestamp(struct kbuffer *kbuf);
unsigned long long kbuffer_subbuf_timestamp(struct kbuffer *kbuf, void *subbuf);
unsigned int kbuffer_ptr_delta(struct kbuffer *kbuf, void *ptr);
void *kbuffer_translate_data(int swap, void *data, unsigned int *size);
void *kbuffer_read_at_offset(struct kbuffer *kbuf, int offset, unsigned long long *ts);
int kbuffer_curr_index(struct kbuffer *kbuf);
int kbuffer_curr_offset(struct kbuffer *kbuf);
int kbuffer_curr_size(struct kbuffer *kbuf);
int kbuffer_event_size(struct kbuffer *kbuf);
int kbuffer_missed_events(struct kbuffer *kbuf);
int kbuffer_subbuffer_size(struct kbuffer *kbuf);
void kbuffer_set_old_format(struct kbuffer *kbuf);
int kbuffer_start_of_data(struct kbuffer *kbuf);
/* Debugging */
struct kbuffer_raw_info {
int type;
int length;
unsigned long long delta;
void *next;
};
/* Read raw data */
struct kbuffer_raw_info *kbuffer_raw_get(struct kbuffer *kbuf, void *subbuf,
struct kbuffer_raw_info *info);
#endif /* _K_BUFFER_H */
tools/lib/traceevent/libtraceevent.pc.template deleted 100644 → 0
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prefix=INSTALL_PREFIX
libdir=LIB_DIR
includedir=HEADER_DIR
Name: libtraceevent
URL: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
Description: Linux kernel trace event library
Version: LIB_VERSION
Cflags: -I${includedir}
Libs: -L${libdir} -ltraceevent
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plugin_jbd2-y += plugin_jbd2.o
plugin_hrtimer-y += plugin_hrtimer.o
plugin_kmem-y += plugin_kmem.o
plugin_kvm-y += plugin_kvm.o
plugin_mac80211-y += plugin_mac80211.o
plugin_sched_switch-y += plugin_sched_switch.o
plugin_function-y += plugin_function.o
plugin_futex-y += plugin_futex.o
plugin_xen-y += plugin_xen.o
plugin_scsi-y += plugin_scsi.o
plugin_cfg80211-y += plugin_cfg80211.o
plugin_tlb-y += plugin_tlb.o
\ No newline at end of file
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tools/perf/MANIFEST
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......@@ -3,7 +3,6 @@ tools/arch
tools/scripts
tools/build
tools/include
tools/lib/traceevent
tools/lib/api
tools/lib/bpf
tools/lib/subcmd
......
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