tools lib traceevent: Remove libtraceevent

libtraceevent is now out-of-date and it is better to depend on the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

Committer notes:

Removed the removed tools/lib/traceevent/ from tools/perf/MANIFEST, so
that 'make perf-tar-src-pkg' works.

Signed-off-by: Ian Rogers <irogers@google.com>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lore.kernel.org/lkml/20221130062935.2219247-5-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 0 insertions, 711 deletions

diff --git a/tools/lib/traceevent/event-plugin.c b/tools/lib/traceevent/event-plugin.c
deleted file mode 100644
index e7f93d5fe4fd..000000000000
--- a/tools/lib/traceevent/event-plugin.c
+++ /dev/null
@@ -1,711 +0,0 @@
-// SPDX-License-Identifier: LGPL-2.1
-/*
- * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
- *
- */
-
-#include <ctype.h>
-#include <stdio.h>
-#include <string.h>
-#include <dlfcn.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <dirent.h>
-#include <errno.h>
-#include "event-parse.h"
-#include "event-parse-local.h"
-#include "event-utils.h"
-#include "trace-seq.h"
-
-#define LOCAL_PLUGIN_DIR ".local/lib/traceevent/plugins/"
-
-static struct registered_plugin_options {
-	struct registered_plugin_options	*next;
-	struct tep_plugin_option		*options;
-} *registered_options;
-
-static struct trace_plugin_options {
-	struct trace_plugin_options	*next;
-	char				*plugin;
-	char				*option;
-	char				*value;
-} *trace_plugin_options;
-
-struct tep_plugin_list {
-	struct tep_plugin_list	*next;
-	char			*name;
-	void			*handle;
-};
-
-struct tep_plugins_dir {
-	struct tep_plugins_dir		*next;
-	char				*path;
-	enum tep_plugin_load_priority	prio;
-};
-
-static void lower_case(char *str)
-{
-	if (!str)
-		return;
-	for (; *str; str++)
-		*str = tolower(*str);
-}
-
-static int update_option_value(struct tep_plugin_option *op, const char *val)
-{
-	char *op_val;
-
-	if (!val) {
-		/* toggle, only if option is boolean */
-		if (op->value)
-			/* Warn? */
-			return 0;
-		op->set ^= 1;
-		return 0;
-	}
-
-	/*
-	 * If the option has a value then it takes a string
-	 * otherwise the option is a boolean.
-	 */
-	if (op->value) {
-		op->value = val;
-		return 0;
-	}
-
-	/* Option is boolean, must be either "1", "0", "true" or "false" */
-
-	op_val = strdup(val);
-	if (!op_val)
-		return -1;
-	lower_case(op_val);
-
-	if (strcmp(val, "1") == 0 || strcmp(val, "true") == 0)
-		op->set = 1;
-	else if (strcmp(val, "0") == 0 || strcmp(val, "false") == 0)
-		op->set = 0;
-	free(op_val);
-
-	return 0;
-}
-
-/**
- * tep_plugin_list_options - get list of plugin options
- *
- * Returns an array of char strings that list the currently registered
- * plugin options in the format of <plugin>:<option>. This list can be
- * used by toggling the option.
- *
- * Returns NULL if there's no options registered. On error it returns
- * INVALID_PLUGIN_LIST_OPTION
- *
- * Must be freed with tep_plugin_free_options_list().
- */
-char **tep_plugin_list_options(void)
-{
-	struct registered_plugin_options *reg;
-	struct tep_plugin_option *op;
-	char **list = NULL;
-	char *name;
-	int count = 0;
-
-	for (reg = registered_options; reg; reg = reg->next) {
-		for (op = reg->options; op->name; op++) {
-			char *alias = op->plugin_alias ? op->plugin_alias : op->file;
-			char **temp = list;
-			int ret;
-
-			ret = asprintf(&name, "%s:%s", alias, op->name);
-			if (ret < 0)
-				goto err;
-
-			list = realloc(list, count + 2);
-			if (!list) {
-				list = temp;
-				free(name);
-				goto err;
-			}
-			list[count++] = name;
-			list[count] = NULL;
-		}
-	}
-	return list;
-
- err:
-	while (--count >= 0)
-		free(list[count]);
-	free(list);
-
-	return INVALID_PLUGIN_LIST_OPTION;
-}
-
-void tep_plugin_free_options_list(char **list)
-{
-	int i;
-
-	if (!list)
-		return;
-
-	if (list == INVALID_PLUGIN_LIST_OPTION)
-		return;
-
-	for (i = 0; list[i]; i++)
-		free(list[i]);
-
-	free(list);
-}
-
-static int
-update_option(const char *file, struct tep_plugin_option *option)
-{
-	struct trace_plugin_options *op;
-	char *plugin;
-	int ret = 0;
-
-	if (option->plugin_alias) {
-		plugin = strdup(option->plugin_alias);
-		if (!plugin)
-			return -1;
-	} else {
-		char *p;
-		plugin = strdup(file);
-		if (!plugin)
-			return -1;
-		p = strstr(plugin, ".");
-		if (p)
-			*p = '\0';
-	}
-
-	/* first look for named options */
-	for (op = trace_plugin_options; op; op = op->next) {
-		if (!op->plugin)
-			continue;
-		if (strcmp(op->plugin, plugin) != 0)
-			continue;
-		if (strcmp(op->option, option->name) != 0)
-			continue;
-
-		ret = update_option_value(option, op->value);
-		if (ret)
-			goto out;
-		break;
-	}
-
-	/* first look for unnamed options */
-	for (op = trace_plugin_options; op; op = op->next) {
-		if (op->plugin)
-			continue;
-		if (strcmp(op->option, option->name) != 0)
-			continue;
-
-		ret = update_option_value(option, op->value);
-		break;
-	}
-
- out:
-	free(plugin);
-	return ret;
-}
-
-/**
- * tep_plugin_add_options - Add a set of options by a plugin
- * @name: The name of the plugin adding the options
- * @options: The set of options being loaded
- *
- * Sets the options with the values that have been added by user.
- */
-int tep_plugin_add_options(const char *name,
-			   struct tep_plugin_option *options)
-{
-	struct registered_plugin_options *reg;
-
-	reg = malloc(sizeof(*reg));
-	if (!reg)
-		return -1;
-	reg->next = registered_options;
-	reg->options = options;
-	registered_options = reg;
-
-	while (options->name) {
-		update_option(name, options);
-		options++;
-	}
-	return 0;
-}
-
-/**
- * tep_plugin_remove_options - remove plugin options that were registered
- * @options: Options to removed that were registered with tep_plugin_add_options
- */
-void tep_plugin_remove_options(struct tep_plugin_option *options)
-{
-	struct registered_plugin_options **last;
-	struct registered_plugin_options *reg;
-
-	for (last = &registered_options; *last; last = &(*last)->next) {
-		if ((*last)->options == options) {
-			reg = *last;
-			*last = reg->next;
-			free(reg);
-			return;
-		}
-	}
-}
-
-static int parse_option_name(char **option, char **plugin)
-{
-	char *p;
-
-	*plugin = NULL;
-
-	if ((p = strstr(*option, ":"))) {
-		*plugin = *option;
-		*p = '\0';
-		*option = strdup(p + 1);
-		if (!*option)
-			return -1;
-	}
-	return 0;
-}
-
-static struct tep_plugin_option *
-find_registered_option(const char *plugin, const char *option)
-{
-	struct registered_plugin_options *reg;
-	struct tep_plugin_option *op;
-	const char *op_plugin;
-
-	for (reg = registered_options; reg; reg = reg->next) {
-		for (op = reg->options; op->name; op++) {
-			if (op->plugin_alias)
-				op_plugin = op->plugin_alias;
-			else
-				op_plugin = op->file;
-
-			if (plugin && strcmp(plugin, op_plugin) != 0)
-				continue;
-			if (strcmp(option, op->name) != 0)
-				continue;
-
-			return op;
-		}
-	}
-
-	return NULL;
-}
-
-static int process_option(const char *plugin, const char *option, const char *val)
-{
-	struct tep_plugin_option *op;
-
-	op = find_registered_option(plugin, option);
-	if (!op)
-		return 0;
-
-	return update_option_value(op, val);
-}
-
-/**
- * tep_plugin_add_option - add an option/val pair to set plugin options
- * @name: The name of the option (format: <plugin>:<option> or just <option>)
- * @val: (optional) the value for the option
- *
- * Modify a plugin option. If @val is given than the value of the option
- * is set (note, some options just take a boolean, so @val must be either
- * "1" or "0" or "true" or "false").
- */
-int tep_plugin_add_option(const char *name, const char *val)
-{
-	struct trace_plugin_options *op;
-	char *option_str;
-	char *plugin;
-
-	option_str = strdup(name);
-	if (!option_str)
-		return -ENOMEM;
-
-	if (parse_option_name(&option_str, &plugin) < 0)
-		return -ENOMEM;
-
-	/* If the option exists, update the val */
-	for (op = trace_plugin_options; op; op = op->next) {
-		/* Both must be NULL or not NULL */
-		if ((!plugin || !op->plugin) && plugin != op->plugin)
-			continue;
-		if (plugin && strcmp(plugin, op->plugin) != 0)
-			continue;
-		if (strcmp(op->option, option_str) != 0)
-			continue;
-
-		/* update option */
-		free(op->value);
-		if (val) {
-			op->value = strdup(val);
-			if (!op->value)
-				goto out_free;
-		} else
-			op->value = NULL;
-
-		/* plugin and option_str don't get freed at the end */
-		free(plugin);
-		free(option_str);
-
-		plugin = op->plugin;
-		option_str = op->option;
-		break;
-	}
-
-	/* If not found, create */
-	if (!op) {
-		op = malloc(sizeof(*op));
-		if (!op)
-			goto out_free;
-		memset(op, 0, sizeof(*op));
-		op->plugin = plugin;
-		op->option = option_str;
-		if (val) {
-			op->value = strdup(val);
-			if (!op->value) {
-				free(op);
-				goto out_free;
-			}
-		}
-		op->next = trace_plugin_options;
-		trace_plugin_options = op;
-	}
-
-	return process_option(plugin, option_str, val);
-
-out_free:
-	free(plugin);
-	free(option_str);
-	return -ENOMEM;
-}
-
-static void print_op_data(struct trace_seq *s, const char *name,
-			  const char *op)
-{
-	if (op)
-		trace_seq_printf(s, "%8s:\t%s\n", name, op);
-}
-
-/**
- * tep_plugin_print_options - print out the registered plugin options
- * @s: The trace_seq descriptor to write the plugin options into
- *
- * Writes a list of options into trace_seq @s.
- */
-void tep_plugin_print_options(struct trace_seq *s)
-{
-	struct registered_plugin_options *reg;
-	struct tep_plugin_option *op;
-
-	for (reg = registered_options; reg; reg = reg->next) {
-		if (reg != registered_options)
-			trace_seq_printf(s, "============\n");
-		for (op = reg->options; op->name; op++) {
-			if (op != reg->options)
-				trace_seq_printf(s, "------------\n");
-			print_op_data(s, "file", op->file);
-			print_op_data(s, "plugin", op->plugin_alias);
-			print_op_data(s, "option", op->name);
-			print_op_data(s, "desc", op->description);
-			print_op_data(s, "value", op->value);
-			trace_seq_printf(s, "%8s:\t%d\n", "set", op->set);
-		}
-	}
-}
-
-/**
- * tep_print_plugins - print out the list of plugins loaded
- * @s: the trace_seq descripter to write to
- * @prefix: The prefix string to add before listing the option name
- * @suffix: The suffix string ot append after the option name
- * @list: The list of plugins (usually returned by tep_load_plugins()
- *
- * Writes to the trace_seq @s the list of plugins (files) that is
- * returned by tep_load_plugins(). Use @prefix and @suffix for formating:
- * @prefix = "  ", @suffix = "\n".
- */
-void tep_print_plugins(struct trace_seq *s,
-		       const char *prefix, const char *suffix,
-		       const struct tep_plugin_list *list)
-{
-	while (list) {
-		trace_seq_printf(s, "%s%s%s", prefix, list->name, suffix);
-		list = list->next;
-	}
-}
-
-static void
-load_plugin(struct tep_handle *tep, const char *path,
-	    const char *file, void *data)
-{
-	struct tep_plugin_list **plugin_list = data;
-	struct tep_plugin_option *options;
-	tep_plugin_load_func func;
-	struct tep_plugin_list *list;
-	const char *alias;
-	char *plugin;
-	void *handle;
-	int ret;
-
-	ret = asprintf(&plugin, "%s/%s", path, file);
-	if (ret < 0) {
-		warning("could not allocate plugin memory\n");
-		return;
-	}
-
-	handle = dlopen(plugin, RTLD_NOW | RTLD_GLOBAL);
-	if (!handle) {
-		warning("could not load plugin '%s'\n%s\n",
-			plugin, dlerror());
-		goto out_free;
-	}
-
-	alias = dlsym(handle, TEP_PLUGIN_ALIAS_NAME);
-	if (!alias)
-		alias = file;
-
-	options = dlsym(handle, TEP_PLUGIN_OPTIONS_NAME);
-	if (options) {
-		while (options->name) {
-			ret = update_option(alias, options);
-			if (ret < 0)
-				goto out_free;
-			options++;
-		}
-	}
-
-	func = dlsym(handle, TEP_PLUGIN_LOADER_NAME);
-	if (!func) {
-		warning("could not find func '%s' in plugin '%s'\n%s\n",
-			TEP_PLUGIN_LOADER_NAME, plugin, dlerror());
-		goto out_free;
-	}
-
-	list = malloc(sizeof(*list));
-	if (!list) {
-		warning("could not allocate plugin memory\n");
-		goto out_free;
-	}
-
-	list->next = *plugin_list;
-	list->handle = handle;
-	list->name = plugin;
-	*plugin_list = list;
-
-	pr_stat("registering plugin: %s", plugin);
-	func(tep);
-	return;
-
- out_free:
-	free(plugin);
-}
-
-static void
-load_plugins_dir(struct tep_handle *tep, const char *suffix,
-		 const char *path,
-		 void (*load_plugin)(struct tep_handle *tep,
-				     const char *path,
-				     const char *name,
-				     void *data),
-		 void *data)
-{
-	struct dirent *dent;
-	struct stat st;
-	DIR *dir;
-	int ret;
-
-	ret = stat(path, &st);
-	if (ret < 0)
-		return;
-
-	if (!S_ISDIR(st.st_mode))
-		return;
-
-	dir = opendir(path);
-	if (!dir)
-		return;
-
-	while ((dent = readdir(dir))) {
-		const char *name = dent->d_name;
-
-		if (strcmp(name, ".") == 0 ||
-		    strcmp(name, "..") == 0)
-			continue;
-
-		/* Only load plugins that end in suffix */
-		if (strcmp(name + (strlen(name) - strlen(suffix)), suffix) != 0)
-			continue;
-
-		load_plugin(tep, path, name, data);
-	}
-
-	closedir(dir);
-}
-
-/**
- * tep_load_plugins_hook - call a user specified callback to load a plugin
- * @tep: handler to traceevent context
- * @suffix: filter only plugin files with given suffix
- * @load_plugin: user specified callback, called for each plugin file
- * @data: custom context, passed to @load_plugin
- *
- * Searches for traceevent plugin files and calls @load_plugin for each
- * The order of plugins search is:
- *  - Directories, specified in @tep->plugins_dir and priority TEP_PLUGIN_FIRST
- *  - Directory, specified at compile time with PLUGIN_TRACEEVENT_DIR
- *  - Directory, specified by environment variable TRACEEVENT_PLUGIN_DIR
- *  - In user's home: ~/.local/lib/traceevent/plugins/
- *  - Directories, specified in @tep->plugins_dir and priority TEP_PLUGIN_LAST
- *
- */
-void tep_load_plugins_hook(struct tep_handle *tep, const char *suffix,
-			   void (*load_plugin)(struct tep_handle *tep,
-					       const char *path,
-					       const char *name,
-					       void *data),
-			   void *data)
-{
-	struct tep_plugins_dir *dir = NULL;
-	char *home;
-	char *path;
-	char *envdir;
-	int ret;
-
-	if (tep && tep->flags & TEP_DISABLE_PLUGINS)
-		return;
-
-	if (tep)
-		dir = tep->plugins_dir;
-	while (dir) {
-		if (dir->prio == TEP_PLUGIN_FIRST)
-			load_plugins_dir(tep, suffix, dir->path,
-					 load_plugin, data);
-		dir = dir->next;
-	}
-
-	/*
-	 * If a system plugin directory was defined,
-	 * check that first.
-	 */
-#ifdef PLUGIN_DIR
-	if (!tep || !(tep->flags & TEP_DISABLE_SYS_PLUGINS))
-		load_plugins_dir(tep, suffix, PLUGIN_DIR,
-				 load_plugin, data);
-#endif
-
-	/*
-	 * Next let the environment-set plugin directory
-	 * override the system defaults.
-	 */
-	envdir = getenv("TRACEEVENT_PLUGIN_DIR");
-	if (envdir)
-		load_plugins_dir(tep, suffix, envdir, load_plugin, data);
-
-	/*
-	 * Now let the home directory override the environment
-	 * or system defaults.
-	 */
-	home = getenv("HOME");
-	if (!home)
-		return;
-
-	ret = asprintf(&path, "%s/%s", home, LOCAL_PLUGIN_DIR);
-	if (ret < 0) {
-		warning("could not allocate plugin memory\n");
-		return;
-	}
-
-	load_plugins_dir(tep, suffix, path, load_plugin, data);
-
-	if (tep)
-		dir = tep->plugins_dir;
-	while (dir) {
-		if (dir->prio == TEP_PLUGIN_LAST)
-			load_plugins_dir(tep, suffix, dir->path,
-					 load_plugin, data);
-		dir = dir->next;
-	}
-
-	free(path);
-}
-
-struct tep_plugin_list*
-tep_load_plugins(struct tep_handle *tep)
-{
-	struct tep_plugin_list *list = NULL;
-
-	tep_load_plugins_hook(tep, ".so", load_plugin, &list);
-	return list;
-}
-
-/**
- * tep_add_plugin_path - Add a new plugin directory.
- * @tep: Trace event handler.
- * @path: Path to a directory. All plugin files in that
- *	  directory will be loaded.
- *@prio: Load priority of the plugins in that directory.
- *
- * Returns -1 in case of an error, 0 otherwise.
- */
-int tep_add_plugin_path(struct tep_handle *tep, char *path,
-			enum tep_plugin_load_priority prio)
-{
-	struct tep_plugins_dir *dir;
-
-	if (!tep || !path)
-		return -1;
-
-	dir = calloc(1, sizeof(*dir));
-	if (!dir)
-		return -1;
-
-	dir->path = strdup(path);
-	if (!dir->path) {
-		free(dir);
-		return -1;
-	}
-	dir->prio = prio;
-	dir->next = tep->plugins_dir;
-	tep->plugins_dir = dir;
-
-	return 0;
-}
-
-__hidden void free_tep_plugin_paths(struct tep_handle *tep)
-{
-	struct tep_plugins_dir *dir;
-
-	if (!tep)
-		return;
-
-	dir = tep->plugins_dir;
-	while (dir) {
-		tep->plugins_dir = tep->plugins_dir->next;
-		free(dir->path);
-		free(dir);
-		dir = tep->plugins_dir;
-	}
-}
-
-void
-tep_unload_plugins(struct tep_plugin_list *plugin_list, struct tep_handle *tep)
-{
-	tep_plugin_unload_func func;
-	struct tep_plugin_list *list;
-
-	while (plugin_list) {
-		list = plugin_list;
-		plugin_list = list->next;
-		func = dlsym(list->handle, TEP_PLUGIN_UNLOADER_NAME);
-		if (func)
-			func(tep);
-		dlclose(list->handle);
-		free(list->name);
-		free(list);
-	}
-}