From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- tools/lib/traceevent/Documentation/Makefile | 207 ++++++++++++++++++++ tools/lib/traceevent/Documentation/asciidoc.conf | 120 ++++++++++++ .../Documentation/libtraceevent-commands.txt | 153 +++++++++++++++ .../Documentation/libtraceevent-cpus.txt | 77 ++++++++ .../Documentation/libtraceevent-endian_read.txt | 78 ++++++++ .../Documentation/libtraceevent-event_find.txt | 103 ++++++++++ .../Documentation/libtraceevent-event_get.txt | 99 ++++++++++ .../Documentation/libtraceevent-event_list.txt | 122 ++++++++++++ .../Documentation/libtraceevent-event_print.txt | 130 +++++++++++++ .../Documentation/libtraceevent-field_find.txt | 118 ++++++++++++ .../Documentation/libtraceevent-field_get_val.txt | 122 ++++++++++++ .../Documentation/libtraceevent-field_print.txt | 126 +++++++++++++ .../Documentation/libtraceevent-field_read.txt | 81 ++++++++ .../Documentation/libtraceevent-fields.txt | 105 +++++++++++ .../Documentation/libtraceevent-file_endian.txt | 91 +++++++++ .../Documentation/libtraceevent-filter.txt | 209 +++++++++++++++++++++ .../Documentation/libtraceevent-func_apis.txt | 183 ++++++++++++++++++ .../Documentation/libtraceevent-func_find.txt | 88 +++++++++ .../Documentation/libtraceevent-handle.txt | 101 ++++++++++ .../Documentation/libtraceevent-header_page.txt | 102 ++++++++++ .../Documentation/libtraceevent-host_endian.txt | 104 ++++++++++ .../Documentation/libtraceevent-long_size.txt | 78 ++++++++ .../Documentation/libtraceevent-page_size.txt | 82 ++++++++ .../Documentation/libtraceevent-parse_event.txt | 90 +++++++++ .../Documentation/libtraceevent-parse_head.txt | 82 ++++++++ .../Documentation/libtraceevent-plugins.txt | 122 ++++++++++++ .../Documentation/libtraceevent-record_parse.txt | 137 ++++++++++++++ .../libtraceevent-reg_event_handler.txt | 156 +++++++++++++++ .../Documentation/libtraceevent-reg_print_func.txt | 155 +++++++++++++++ .../Documentation/libtraceevent-set_flag.txt | 104 ++++++++++ .../Documentation/libtraceevent-strerror.txt | 85 +++++++++ .../Documentation/libtraceevent-tseq.txt | 158 ++++++++++++++++ .../lib/traceevent/Documentation/libtraceevent.txt | 192 +++++++++++++++++++ .../lib/traceevent/Documentation/manpage-1.72.xsl | 14 ++ .../lib/traceevent/Documentation/manpage-base.xsl | 35 ++++ .../Documentation/manpage-bold-literal.xsl | 17 ++ .../traceevent/Documentation/manpage-normal.xsl | 13 ++ .../Documentation/manpage-suppress-sp.xsl | 21 +++ 38 files changed, 4060 insertions(+) create mode 100644 tools/lib/traceevent/Documentation/Makefile create mode 100644 tools/lib/traceevent/Documentation/asciidoc.conf create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-commands.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-cpus.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-endian_read.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-event_find.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-event_get.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-event_list.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-event_print.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-field_find.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-field_get_val.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-field_print.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-field_read.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-fields.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-file_endian.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-filter.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-func_apis.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-func_find.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-handle.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-header_page.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-host_endian.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-long_size.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-page_size.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-parse_event.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-parse_head.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-plugins.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-record_parse.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-reg_event_handler.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-reg_print_func.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-set_flag.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-strerror.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent-tseq.txt create mode 100644 tools/lib/traceevent/Documentation/libtraceevent.txt create mode 100644 tools/lib/traceevent/Documentation/manpage-1.72.xsl create mode 100644 tools/lib/traceevent/Documentation/manpage-base.xsl create mode 100644 tools/lib/traceevent/Documentation/manpage-bold-literal.xsl create mode 100644 tools/lib/traceevent/Documentation/manpage-normal.xsl create mode 100644 tools/lib/traceevent/Documentation/manpage-suppress-sp.xsl (limited to 'tools/lib/traceevent/Documentation') diff --git a/tools/lib/traceevent/Documentation/Makefile b/tools/lib/traceevent/Documentation/Makefile new file mode 100644 index 000000000..aa72ab96c --- /dev/null +++ b/tools/lib/traceevent/Documentation/Makefile @@ -0,0 +1,207 @@ +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 $@+ $@ diff --git a/tools/lib/traceevent/Documentation/asciidoc.conf b/tools/lib/traceevent/Documentation/asciidoc.conf new file mode 100644 index 000000000..07595717f --- /dev/null +++ b/tools/lib/traceevent/Documentation/asciidoc.conf @@ -0,0 +1,120 @@ +## linktep: macro +# +# Usage: linktep:command[manpage-section] +# +# Note, {0} is the manpage section, while {target} is the command. +# +# Show TEP link as: (
); if section is defined, else just show +# the command. + +[macros] +(?su)[\\]?(?Plinktep):(?P\S*?)\[(?P.*?)\]= + +[attributes] +asterisk=* +plus=+ +caret=^ +startsb=[ +endsb=] +tilde=~ + +ifdef::backend-docbook[] +[linktep-inlinemacro] +{0%{target}} +{0#} +{0#{target}{0}} +{0#} +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] +{title} + +ifdef::doctype-manpage[] + .ft C +endif::doctype-manpage[] +| +ifdef::doctype-manpage[] + .ft +endif::doctype-manpage[] + +{title#} +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] +{title} + +| + +{title#} + +[verseblock] +{title} +{title%} +{title#} +| + +{title#} +{title%} +endif::doctype-manpage[] +endif::tep-asciidoc-no-roff[] +endif::backend-docbook[] + +ifdef::doctype-manpage[] +ifdef::backend-docbook[] +[header] +template::[header-declarations] + + +{mantitle} +{manvolnum} +libtraceevent +{libtraceevent_version} +libtraceevent Manual + + + {manname1} + {manname2} + {manname3} + {manname4} + {manname5} + {manname6} + {manname7} + {manname8} + {manname9} + {manname10} + {manname11} + {manname12} + {manname13} + {manname14} + {manname15} + {manname16} + {manname17} + {manname18} + {manname19} + {manname20} + {manname21} + {manname22} + {manname23} + {manname24} + {manname25} + {manname26} + {manname27} + {manname28} + {manname29} + {manname30} + {manpurpose} + +endif::backend-docbook[] +endif::doctype-manpage[] + +ifdef::backend-xhtml11[] +[linktep-inlinemacro] +{target}{0?({0})} +endif::backend-xhtml11[] diff --git a/tools/lib/traceevent/Documentation/libtraceevent-commands.txt b/tools/lib/traceevent/Documentation/libtraceevent-commands.txt new file mode 100644 index 000000000..bec552001 --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-commands.txt @@ -0,0 +1,153 @@ +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 * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-cpus.txt b/tools/lib/traceevent/Documentation/libtraceevent-cpus.txt new file mode 100644 index 000000000..5ad70e43b --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-cpus.txt @@ -0,0 +1,77 @@ +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 * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-endian_read.txt b/tools/lib/traceevent/Documentation/libtraceevent-endian_read.txt new file mode 100644 index 000000000..e64851b6e --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-endian_read.txt @@ -0,0 +1,78 @@ +libtraceevent(3) +================ + +NAME +---- +tep_read_number - Reads a number from raw data. + +SYNOPSIS +-------- +[verse] +-- +*#include * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-event_find.txt b/tools/lib/traceevent/Documentation/libtraceevent-event_find.txt new file mode 100644 index 000000000..7bc062c9f --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-event_find.txt @@ -0,0 +1,103 @@ +libtraceevent(3) +================ + +NAME +---- +tep_find_event,tep_find_event_by_name,tep_find_event_by_record - +Find events by given key. + +SYNOPSIS +-------- +[verse] +-- +*#include * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-event_get.txt b/tools/lib/traceevent/Documentation/libtraceevent-event_get.txt new file mode 100644 index 000000000..6525092fc --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-event_get.txt @@ -0,0 +1,99 @@ +libtraceevent(3) +================ + +NAME +---- +tep_get_event, tep_get_first_event, tep_get_events_count - Access events. + +SYNOPSIS +-------- +[verse] +-- +*#include * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-event_list.txt b/tools/lib/traceevent/Documentation/libtraceevent-event_list.txt new file mode 100644 index 000000000..fba350e5a --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-event_list.txt @@ -0,0 +1,122 @@ +libtraceevent(3) +================ + +NAME +---- +tep_list_events, tep_list_events_copy - +Get list of events, sorted by given criteria. + +SYNOPSIS +-------- +[verse] +-- +*#include * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-event_print.txt b/tools/lib/traceevent/Documentation/libtraceevent-event_print.txt new file mode 100644 index 000000000..2c6a61811 --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-event_print.txt @@ -0,0 +1,130 @@ +libtraceevent(3) +================ + +NAME +---- +tep_print_event - Writes event information into a trace sequence. + +SYNOPSIS +-------- +[verse] +-- +*#include * +*#include * + +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 +#include +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-field_find.txt b/tools/lib/traceevent/Documentation/libtraceevent-field_find.txt new file mode 100644 index 000000000..0896af5b9 --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-field_find.txt @@ -0,0 +1,118 @@ +libtraceevent(3) +================ + +NAME +---- +tep_find_common_field, tep_find_field, tep_find_any_field - +Search for a field in an event. + +SYNOPSIS +-------- +[verse] +-- +*#include * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-field_get_val.txt b/tools/lib/traceevent/Documentation/libtraceevent-field_get_val.txt new file mode 100644 index 000000000..6324f0d48 --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-field_get_val.txt @@ -0,0 +1,122 @@ +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 * +*#include * + +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 +#include +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-field_print.txt b/tools/lib/traceevent/Documentation/libtraceevent-field_print.txt new file mode 100644 index 000000000..9a9df98ac --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-field_print.txt @@ -0,0 +1,126 @@ +libtraceevent(3) +================ + +NAME +---- +tep_print_field, tep_print_fields, tep_print_num_field, tep_print_func_field - +Print the field content. + +SYNOPSIS +-------- +[verse] +-- +*#include * +*#include * + +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 +#include +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-field_read.txt b/tools/lib/traceevent/Documentation/libtraceevent-field_read.txt new file mode 100644 index 000000000..64e9e25d3 --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-field_read.txt @@ -0,0 +1,81 @@ +libtraceevent(3) +================ + +NAME +---- +tep_read_number_field - Reads a number from raw data. + +SYNOPSIS +-------- +[verse] +-- +*#include * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-fields.txt b/tools/lib/traceevent/Documentation/libtraceevent-fields.txt new file mode 100644 index 000000000..1ccb531d5 --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-fields.txt @@ -0,0 +1,105 @@ +libtraceevent(3) +================ + +NAME +---- +tep_event_common_fields, tep_event_fields - Get a list of fields for an event. + +SYNOPSIS +-------- +[verse] +-- +*#include * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-file_endian.txt b/tools/lib/traceevent/Documentation/libtraceevent-file_endian.txt new file mode 100644 index 000000000..f401ad311 --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-file_endian.txt @@ -0,0 +1,91 @@ +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 * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-filter.txt b/tools/lib/traceevent/Documentation/libtraceevent-filter.txt new file mode 100644 index 000000000..4a9962d8c --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-filter.txt @@ -0,0 +1,209 @@ +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 * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-func_apis.txt b/tools/lib/traceevent/Documentation/libtraceevent-func_apis.txt new file mode 100644 index 000000000..f6aca0df2 --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-func_apis.txt @@ -0,0 +1,183 @@ +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 * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-func_find.txt b/tools/lib/traceevent/Documentation/libtraceevent-func_find.txt new file mode 100644 index 000000000..04840e244 --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-func_find.txt @@ -0,0 +1,88 @@ +libtraceevent(3) +================ + +NAME +---- +tep_find_function,tep_find_function_address - Find function name / start address. + +SYNOPSIS +-------- +[verse] +-- +*#include * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-handle.txt b/tools/lib/traceevent/Documentation/libtraceevent-handle.txt new file mode 100644 index 000000000..45b20172e --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-handle.txt @@ -0,0 +1,101 @@ +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 * + +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 + +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-header_page.txt b/tools/lib/traceevent/Documentation/libtraceevent-header_page.txt new file mode 100644 index 000000000..615d117dc --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-header_page.txt @@ -0,0 +1,102 @@ +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 * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-host_endian.txt b/tools/lib/traceevent/Documentation/libtraceevent-host_endian.txt new file mode 100644 index 000000000..d5d375eb8 --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-host_endian.txt @@ -0,0 +1,104 @@ +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 * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-long_size.txt b/tools/lib/traceevent/Documentation/libtraceevent-long_size.txt new file mode 100644 index 000000000..01d78ea25 --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-long_size.txt @@ -0,0 +1,78 @@ +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 * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-page_size.txt b/tools/lib/traceevent/Documentation/libtraceevent-page_size.txt new file mode 100644 index 000000000..452c0cfa1 --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-page_size.txt @@ -0,0 +1,82 @@ +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 * + +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 +#include +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-parse_event.txt b/tools/lib/traceevent/Documentation/libtraceevent-parse_event.txt new file mode 100644 index 000000000..f248114ca --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-parse_event.txt @@ -0,0 +1,90 @@ +libtraceevent(3) +================ + +NAME +---- +tep_parse_event, tep_parse_format - Parse the event format information + +SYNOPSIS +-------- +[verse] +-- +*#include * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-parse_head.txt b/tools/lib/traceevent/Documentation/libtraceevent-parse_head.txt new file mode 100644 index 000000000..c90f16c7d --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-parse_head.txt @@ -0,0 +1,82 @@ +libtraceevent(3) +================ + +NAME +---- +tep_parse_header_page - Parses the data stored in the header page. + +SYNOPSIS +-------- +[verse] +-- +*#include * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-plugins.txt b/tools/lib/traceevent/Documentation/libtraceevent-plugins.txt new file mode 100644 index 000000000..4d6394397 --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-plugins.txt @@ -0,0 +1,122 @@ +libtraceevent(3) +================ + +NAME +---- +tep_load_plugins, tep_unload_plugins, tep_load_plugins_hook - Load / unload traceevent plugins. + +SYNOPSIS +-------- +[verse] +-- +*#include * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-record_parse.txt b/tools/lib/traceevent/Documentation/libtraceevent-record_parse.txt new file mode 100644 index 000000000..e9a69116c --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-record_parse.txt @@ -0,0 +1,137 @@ +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 * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-reg_event_handler.txt b/tools/lib/traceevent/Documentation/libtraceevent-reg_event_handler.txt new file mode 100644 index 000000000..53d37d72a --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-reg_event_handler.txt @@ -0,0 +1,156 @@ +libtraceevent(3) +================ + +NAME +---- +tep_register_event_handler, tep_unregister_event_handler - Register / +unregisters a callback function to parse an event information. + +SYNOPSIS +-------- +[verse] +-- +*#include * + +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 +#include +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-reg_print_func.txt b/tools/lib/traceevent/Documentation/libtraceevent-reg_print_func.txt new file mode 100644 index 000000000..708dce91e --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-reg_print_func.txt @@ -0,0 +1,155 @@ +libtraceevent(3) +================ + +NAME +---- +tep_register_print_function,tep_unregister_print_function - +Registers / Unregisters a helper function. + +SYNOPSIS +-------- +[verse] +-- +*#include * + +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 +#include +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-set_flag.txt b/tools/lib/traceevent/Documentation/libtraceevent-set_flag.txt new file mode 100644 index 000000000..b0599780b --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-set_flag.txt @@ -0,0 +1,104 @@ +libtraceevent(3) +================ + +NAME +---- +tep_set_flag, tep_clear_flag, tep_test_flag - +Manage flags of trace event parser context. + +SYNOPSIS +-------- +[verse] +-- +*#include * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-strerror.txt b/tools/lib/traceevent/Documentation/libtraceevent-strerror.txt new file mode 100644 index 000000000..ee4062a00 --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-strerror.txt @@ -0,0 +1,85 @@ +libtraceevent(3) +================ + +NAME +---- +tep_strerror - Returns a string describing regular errno and tep error number. + +SYNOPSIS +-------- +[verse] +-- +*#include * + +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 +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent-tseq.txt b/tools/lib/traceevent/Documentation/libtraceevent-tseq.txt new file mode 100644 index 000000000..8ac6aa174 --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent-tseq.txt @@ -0,0 +1,158 @@ +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 * +*#include * + +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 +#include +... +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* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/libtraceevent.txt b/tools/lib/traceevent/Documentation/libtraceevent.txt new file mode 100644 index 000000000..d530a7ce8 --- /dev/null +++ b/tools/lib/traceevent/Documentation/libtraceevent.txt @@ -0,0 +1,192 @@ +libtraceevent(3) +================ + +NAME +---- +libtraceevent - Linux kernel trace event library + +SYNOPSIS +-------- +[verse] +-- +*#include * + +Management of tep handler data structure and access of its members: + 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_); + 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 _flags_); + int *tep_get_cpus*(struct tep_handle pass:[*]_tep_); + void *tep_set_cpus*(struct tep_handle pass:[*]_tep_, int _cpus_); + int *tep_get_long_size*(strucqt tep_handle pass:[*]_tep_); + void *tep_set_long_size*(struct tep_handle pass:[*]_tep_, int _long_size_); + int *tep_get_page_size*(struct tep_handle pass:[*]_tep_); + void *tep_set_page_size*(struct tep_handle pass:[*]_tep_, int _page_size_); + 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_); + int *tep_strerror*(struct tep_handle pass:[*]_tep_, enum tep_errno _errnum_, char pass:[*]_buf_, size_t _buflen_); + +Register / unregister APIs: + int *tep_register_function*(struct tep_handle pass:[*]_tep_, char pass:[*]_name_, unsigned long long _addr_, char pass:[*]_mod_); + 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_); + int *tep_register_print_string*(struct tep_handle pass:[*]_tep_, const char pass:[*]_fmt_, unsigned long long _addr_); + 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_); + +Plugins management: + 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_); + char pass:[*]pass:[*]*tep_plugin_list_options*(void); + void *tep_plugin_free_options_list*(char pass:[*]pass:[*]_list_); + int *tep_plugin_add_options*(const char pass:[*]_name_, struct tep_plugin_option pass:[*]_options_); + void *tep_plugin_remove_options*(struct tep_plugin_option pass:[*]_options_); + void *tep_print_plugins*(struct trace_seq pass:[*]_s_, const char pass:[*]_prefix_, const char pass:[*]_suffix_, const struct tep_plugin_list pass:[*]_list_); + +Event related APIs: + 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_); + 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_); + void *tep_print_event*(struct tep_handle pass:[*]_tep_, struct trace_seq pass:[*]_s_, struct tep_record pass:[*]_record_, const char pass:[*]_fmt_, _..._); + +Event finding: + 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_); + +Parsing of event files: + int *tep_parse_header_page*(struct tep_handle pass:[*]_tep_, char pass:[*]_buf_, unsigned long _size_, int _long_size_); + 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_); + +APIs related to fields from event's format files: + 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_); + 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_); + 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_); + 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_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_read_number_field*(struct tep_format_field pass:[*]_field_, const void pass:[*]_data_, unsigned long long pass:[*]_value_); + +Event fields printing: + 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_); + +Event fields finding: + 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_); + +Functions resolver: + 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_); + +Filter management: + struct tep_event_filter pass:[*]*tep_filter_alloc*(struct tep_handle pass:[*]_tep_); + enum tep_errno *tep_filter_add_filter_str*(struct tep_event_filter pass:[*]_filter_, const char pass:[*]_filter_str_); + enum tep_errno *tep_filter_match*(struct tep_event_filter pass:[*]_filter_, struct tep_record pass:[*]_record_); + int *tep_filter_strerror*(struct tep_event_filter pass:[*]_filter_, enum tep_errno _err_, char pass:[*]buf, size_t _buflen_); + int *tep_event_filtered*(struct tep_event_filter pass:[*]_filter_, int _event_id_); + void *tep_filter_reset*(struct tep_event_filter pass:[*]_filter_); + void *tep_filter_free*(struct tep_event_filter pass:[*]_filter_); + char pass:[*]*tep_filter_make_string*(struct tep_event_filter pass:[*]_filter_, int _event_id_); + int *tep_filter_remove_event*(struct tep_event_filter pass:[*]_filter_, int _event_id_); + 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_); + +Parsing various data from the records: + 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_); + +Command and task related APIs: + const char pass:[*]*tep_data_comm_from_pid*(struct tep_handle pass:[*]_tep_, int _pid_); + struct cmdline pass:[*]*tep_data_pid_from_comm*(struct tep_handle pass:[*]_tep_, const char pass:[*]_comm_, struct cmdline pass:[*]_next_); + 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_); + int *tep_cmdline_pid*(struct tep_handle pass:[*]_tep_, struct cmdline pass:[*]_cmdline_); + +Endian related APIs: + int *tep_is_bigendian*(void); + unsigned long long *tep_read_number*(struct tep_handle pass:[*]_tep_, const void pass:[*]_ptr_, int _size_); + bool *tep_is_file_bigendian*(struct tep_handle pass:[*]_tep_); + void *tep_set_file_bigendian*(struct tep_handle pass:[*]_tep_, enum tep_endian _endian_); + bool *tep_is_local_bigendian*(struct tep_handle pass:[*]_tep_); + void *tep_set_local_bigendian*(struct tep_handle pass:[*]_tep_, enum tep_endian _endian_); + +Trace sequences: +*#include * + void *trace_seq_init*(struct trace_seq pass:[*]_s_); + void *trace_seq_reset*(struct trace_seq pass:[*]_s_); + void *trace_seq_destroy*(struct trace_seq pass:[*]_s_); + 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_puts*(struct trace_seq pass:[*]_s_, const char pass:[*]_str_); + int *trace_seq_putc*(struct trace_seq pass:[*]_s_, unsigned char _c_); + void *trace_seq_terminate*(struct trace_seq pass:[*]_s_); + int *trace_seq_do_fprintf*(struct trace_seq pass:[*]_s_, FILE pass:[*]_fp_); + int *trace_seq_do_printf*(struct trace_seq pass:[*]_s_); +-- + +DESCRIPTION +----------- +The libtraceevent(3) library provides APIs to access kernel tracepoint events, +located in the tracefs file system under the events directory. + +ENVIRONMENT +----------- +[verse] +-- +TRACEEVENT_PLUGIN_DIR + Additional plugin directory. All shared object files, located in this directory will be loaded as traceevent plugins. +-- + +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 +-------- +_trace-cmd(1)_ + +AUTHOR +------ +[verse] +-- +*Steven Rostedt* , author of *libtraceevent*. +*Tzvetomir Stoyanov* , author of this man page. +-- +REPORTING BUGS +-------------- +Report bugs to + +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 diff --git a/tools/lib/traceevent/Documentation/manpage-1.72.xsl b/tools/lib/traceevent/Documentation/manpage-1.72.xsl new file mode 100644 index 000000000..b4d315cb8 --- /dev/null +++ b/tools/lib/traceevent/Documentation/manpage-1.72.xsl @@ -0,0 +1,14 @@ + + + + + + +▓ +⌂ + + diff --git a/tools/lib/traceevent/Documentation/manpage-base.xsl b/tools/lib/traceevent/Documentation/manpage-base.xsl new file mode 100644 index 000000000..a264fa616 --- /dev/null +++ b/tools/lib/traceevent/Documentation/manpage-base.xsl @@ -0,0 +1,35 @@ + + + + + + + + + + + + + + sp + + + + + + + + br + + + diff --git a/tools/lib/traceevent/Documentation/manpage-bold-literal.xsl b/tools/lib/traceevent/Documentation/manpage-bold-literal.xsl new file mode 100644 index 000000000..608eb5df6 --- /dev/null +++ b/tools/lib/traceevent/Documentation/manpage-bold-literal.xsl @@ -0,0 +1,17 @@ + + + + + + + fB + + + fR + + + diff --git a/tools/lib/traceevent/Documentation/manpage-normal.xsl b/tools/lib/traceevent/Documentation/manpage-normal.xsl new file mode 100644 index 000000000..a48f5b11f --- /dev/null +++ b/tools/lib/traceevent/Documentation/manpage-normal.xsl @@ -0,0 +1,13 @@ + + + + + + +\ +. + + diff --git a/tools/lib/traceevent/Documentation/manpage-suppress-sp.xsl b/tools/lib/traceevent/Documentation/manpage-suppress-sp.xsl new file mode 100644 index 000000000..a63c7632a --- /dev/null +++ b/tools/lib/traceevent/Documentation/manpage-suppress-sp.xsl @@ -0,0 +1,21 @@ + + + + + + + + + + + + + + + -- cgit v1.2.3