Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 526 insertions, 0 deletions

diff --git a/kernel/tools/perf/builtin-probe.c b/kernel/tools/perf/builtin-probe.c
new file mode 100644
index 000000000..f7b1af67e
--- /dev/null
+++ b/kernel/tools/perf/builtin-probe.c
@@ -0,0 +1,526 @@
+/*
+ * builtin-probe.c
+ *
+ * Builtin probe command: Set up probe events by C expression
+ *
+ * Written by Masami Hiramatsu <mhiramat@redhat.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+#include <sys/utsname.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "perf.h"
+#include "builtin.h"
+#include "util/util.h"
+#include "util/strlist.h"
+#include "util/strfilter.h"
+#include "util/symbol.h"
+#include "util/debug.h"
+#include <api/fs/debugfs.h>
+#include "util/parse-options.h"
+#include "util/probe-finder.h"
+#include "util/probe-event.h"
+
+#define DEFAULT_VAR_FILTER "!__k???tab_* & !__crc_*"
+#define DEFAULT_FUNC_FILTER "!_*"
+
+/* Session management structure */
+static struct {
+	bool list_events;
+	bool force_add;
+	bool show_lines;
+	bool show_vars;
+	bool show_ext_vars;
+	bool show_funcs;
+	bool mod_events;
+	bool uprobes;
+	bool quiet;
+	bool target_used;
+	int nevents;
+	struct perf_probe_event events[MAX_PROBES];
+	struct strlist *dellist;
+	struct line_range line_range;
+	char *target;
+	int max_probe_points;
+	struct strfilter *filter;
+} params;
+
+/* Parse an event definition. Note that any error must die. */
+static int parse_probe_event(const char *str)
+{
+	struct perf_probe_event *pev = &params.events[params.nevents];
+	int ret;
+
+	pr_debug("probe-definition(%d): %s\n", params.nevents, str);
+	if (++params.nevents == MAX_PROBES) {
+		pr_err("Too many probes (> %d) were specified.", MAX_PROBES);
+		return -1;
+	}
+
+	pev->uprobes = params.uprobes;
+	if (params.target) {
+		pev->target = strdup(params.target);
+		if (!pev->target)
+			return -ENOMEM;
+		params.target_used = true;
+	}
+
+	/* Parse a perf-probe command into event */
+	ret = parse_perf_probe_command(str, pev);
+	pr_debug("%d arguments\n", pev->nargs);
+
+	return ret;
+}
+
+static int set_target(const char *ptr)
+{
+	int found = 0;
+	const char *buf;
+
+	/*
+	 * The first argument after options can be an absolute path
+	 * to an executable / library or kernel module.
+	 *
+	 * TODO: Support relative path, and $PATH, $LD_LIBRARY_PATH,
+	 * short module name.
+	 */
+	if (!params.target && ptr && *ptr == '/') {
+		params.target = strdup(ptr);
+		if (!params.target)
+			return -ENOMEM;
+		params.target_used = false;
+
+		found = 1;
+		buf = ptr + (strlen(ptr) - 3);
+
+		if (strcmp(buf, ".ko"))
+			params.uprobes = true;
+
+	}
+
+	return found;
+}
+
+static int parse_probe_event_argv(int argc, const char **argv)
+{
+	int i, len, ret, found_target;
+	char *buf;
+
+	found_target = set_target(argv[0]);
+	if (found_target < 0)
+		return found_target;
+
+	if (found_target && argc == 1)
+		return 0;
+
+	/* Bind up rest arguments */
+	len = 0;
+	for (i = 0; i < argc; i++) {
+		if (i == 0 && found_target)
+			continue;
+
+		len += strlen(argv[i]) + 1;
+	}
+	buf = zalloc(len + 1);
+	if (buf == NULL)
+		return -ENOMEM;
+	len = 0;
+	for (i = 0; i < argc; i++) {
+		if (i == 0 && found_target)
+			continue;
+
+		len += sprintf(&buf[len], "%s ", argv[i]);
+	}
+	params.mod_events = true;
+	ret = parse_probe_event(buf);
+	free(buf);
+	return ret;
+}
+
+static int opt_add_probe_event(const struct option *opt __maybe_unused,
+			      const char *str, int unset __maybe_unused)
+{
+	if (str) {
+		params.mod_events = true;
+		return parse_probe_event(str);
+	} else
+		return 0;
+}
+
+static int opt_del_probe_event(const struct option *opt __maybe_unused,
+			       const char *str, int unset __maybe_unused)
+{
+	if (str) {
+		params.mod_events = true;
+		if (!params.dellist)
+			params.dellist = strlist__new(true, NULL);
+		strlist__add(params.dellist, str);
+	}
+	return 0;
+}
+
+static int opt_set_target(const struct option *opt, const char *str,
+			int unset __maybe_unused)
+{
+	int ret = -ENOENT;
+	char *tmp;
+
+	if  (str) {
+		if (!strcmp(opt->long_name, "exec"))
+			params.uprobes = true;
+#ifdef HAVE_DWARF_SUPPORT
+		else if (!strcmp(opt->long_name, "module"))
+			params.uprobes = false;
+#endif
+		else
+			return ret;
+
+		/* Expand given path to absolute path, except for modulename */
+		if (params.uprobes || strchr(str, '/')) {
+			tmp = realpath(str, NULL);
+			if (!tmp) {
+				pr_warning("Failed to get the absolute path of %s: %m\n", str);
+				return ret;
+			}
+		} else {
+			tmp = strdup(str);
+			if (!tmp)
+				return -ENOMEM;
+		}
+		free(params.target);
+		params.target = tmp;
+		params.target_used = false;
+		ret = 0;
+	}
+
+	return ret;
+}
+
+#ifdef HAVE_DWARF_SUPPORT
+static int opt_show_lines(const struct option *opt __maybe_unused,
+			  const char *str, int unset __maybe_unused)
+{
+	int ret = 0;
+
+	if (!str)
+		return 0;
+
+	if (params.show_lines) {
+		pr_warning("Warning: more than one --line options are"
+			   " detected. Only the first one is valid.\n");
+		return 0;
+	}
+
+	params.show_lines = true;
+	ret = parse_line_range_desc(str, &params.line_range);
+
+	return ret;
+}
+
+static int opt_show_vars(const struct option *opt __maybe_unused,
+			 const char *str, int unset __maybe_unused)
+{
+	struct perf_probe_event *pev = &params.events[params.nevents];
+	int ret;
+
+	if (!str)
+		return 0;
+
+	ret = parse_probe_event(str);
+	if (!ret && pev->nargs != 0) {
+		pr_err("  Error: '--vars' doesn't accept arguments.\n");
+		return -EINVAL;
+	}
+	params.show_vars = true;
+
+	return ret;
+}
+#endif
+
+static int opt_set_filter(const struct option *opt __maybe_unused,
+			  const char *str, int unset __maybe_unused)
+{
+	const char *err;
+
+	if (str) {
+		pr_debug2("Set filter: %s\n", str);
+		if (params.filter)
+			strfilter__delete(params.filter);
+		params.filter = strfilter__new(str, &err);
+		if (!params.filter) {
+			pr_err("Filter parse error at %td.\n", err - str + 1);
+			pr_err("Source: \"%s\"\n", str);
+			pr_err("         %*c\n", (int)(err - str + 1), '^');
+			return -EINVAL;
+		}
+	}
+
+	return 0;
+}
+
+static int init_params(void)
+{
+	return line_range__init(&params.line_range);
+}
+
+static void cleanup_params(void)
+{
+	int i;
+
+	for (i = 0; i < params.nevents; i++)
+		clear_perf_probe_event(params.events + i);
+	if (params.dellist)
+		strlist__delete(params.dellist);
+	line_range__clear(&params.line_range);
+	free(params.target);
+	if (params.filter)
+		strfilter__delete(params.filter);
+	memset(&params, 0, sizeof(params));
+}
+
+static void pr_err_with_code(const char *msg, int err)
+{
+	char sbuf[STRERR_BUFSIZE];
+
+	pr_err("%s", msg);
+	pr_debug(" Reason: %s (Code: %d)",
+		 strerror_r(-err, sbuf, sizeof(sbuf)), err);
+	pr_err("\n");
+}
+
+static int
+__cmd_probe(int argc, const char **argv, const char *prefix __maybe_unused)
+{
+	const char * const probe_usage[] = {
+		"perf probe [<options>] 'PROBEDEF' ['PROBEDEF' ...]",
+		"perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]",
+		"perf probe [<options>] --del '[GROUP:]EVENT' ...",
+		"perf probe --list",
+#ifdef HAVE_DWARF_SUPPORT
+		"perf probe [<options>] --line 'LINEDESC'",
+		"perf probe [<options>] --vars 'PROBEPOINT'",
+#endif
+		NULL
+};
+	struct option options[] = {
+	OPT_INCR('v', "verbose", &verbose,
+		    "be more verbose (show parsed arguments, etc)"),
+	OPT_BOOLEAN('q', "quiet", &params.quiet,
+		    "be quiet (do not show any mesages)"),
+	OPT_BOOLEAN('l', "list", &params.list_events,
+		    "list up current probe events"),
+	OPT_CALLBACK('d', "del", NULL, "[GROUP:]EVENT", "delete a probe event.",
+		opt_del_probe_event),
+	OPT_CALLBACK('a', "add", NULL,
+#ifdef HAVE_DWARF_SUPPORT
+		"[EVENT=]FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT"
+		" [[NAME=]ARG ...]",
+#else
+		"[EVENT=]FUNC[+OFF|%return] [[NAME=]ARG ...]",
+#endif
+		"probe point definition, where\n"
+		"\t\tGROUP:\tGroup name (optional)\n"
+		"\t\tEVENT:\tEvent name\n"
+		"\t\tFUNC:\tFunction name\n"
+		"\t\tOFF:\tOffset from function entry (in byte)\n"
+		"\t\t%return:\tPut the probe at function return\n"
+#ifdef HAVE_DWARF_SUPPORT
+		"\t\tSRC:\tSource code path\n"
+		"\t\tRL:\tRelative line number from function entry.\n"
+		"\t\tAL:\tAbsolute line number in file.\n"
+		"\t\tPT:\tLazy expression of line code.\n"
+		"\t\tARG:\tProbe argument (local variable name or\n"
+		"\t\t\tkprobe-tracer argument format.)\n",
+#else
+		"\t\tARG:\tProbe argument (kprobe-tracer argument format.)\n",
+#endif
+		opt_add_probe_event),
+	OPT_BOOLEAN('f', "force", &params.force_add, "forcibly add events"
+		    " with existing name"),
+#ifdef HAVE_DWARF_SUPPORT
+	OPT_CALLBACK('L', "line", NULL,
+		     "FUNC[:RLN[+NUM|-RLN2]]|SRC:ALN[+NUM|-ALN2]",
+		     "Show source code lines.", opt_show_lines),
+	OPT_CALLBACK('V', "vars", NULL,
+		     "FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT",
+		     "Show accessible variables on PROBEDEF", opt_show_vars),
+	OPT_BOOLEAN('\0', "externs", &params.show_ext_vars,
+		    "Show external variables too (with --vars only)"),
+	OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
+		   "file", "vmlinux pathname"),
+	OPT_STRING('s', "source", &symbol_conf.source_prefix,
+		   "directory", "path to kernel source"),
+	OPT_CALLBACK('m', "module", NULL, "modname|path",
+		"target module name (for online) or path (for offline)",
+		opt_set_target),
+#endif
+	OPT__DRY_RUN(&probe_event_dry_run),
+	OPT_INTEGER('\0', "max-probes", &params.max_probe_points,
+		 "Set how many probe points can be found for a probe."),
+	OPT_BOOLEAN('F', "funcs", &params.show_funcs,
+		    "Show potential probe-able functions."),
+	OPT_CALLBACK('\0', "filter", NULL,
+		     "[!]FILTER", "Set a filter (with --vars/funcs only)\n"
+		     "\t\t\t(default: \"" DEFAULT_VAR_FILTER "\" for --vars,\n"
+		     "\t\t\t \"" DEFAULT_FUNC_FILTER "\" for --funcs)",
+		     opt_set_filter),
+	OPT_CALLBACK('x', "exec", NULL, "executable|path",
+			"target executable name or path", opt_set_target),
+	OPT_BOOLEAN(0, "demangle", &symbol_conf.demangle,
+		    "Enable symbol demangling"),
+	OPT_BOOLEAN(0, "demangle-kernel", &symbol_conf.demangle_kernel,
+		    "Enable kernel symbol demangling"),
+	OPT_END()
+	};
+	int ret;
+
+	set_option_flag(options, 'a', "add", PARSE_OPT_EXCLUSIVE);
+	set_option_flag(options, 'd', "del", PARSE_OPT_EXCLUSIVE);
+	set_option_flag(options, 'l', "list", PARSE_OPT_EXCLUSIVE);
+#ifdef HAVE_DWARF_SUPPORT
+	set_option_flag(options, 'L', "line", PARSE_OPT_EXCLUSIVE);
+	set_option_flag(options, 'V', "vars", PARSE_OPT_EXCLUSIVE);
+#endif
+
+	argc = parse_options(argc, argv, options, probe_usage,
+			     PARSE_OPT_STOP_AT_NON_OPTION);
+	if (argc > 0) {
+		if (strcmp(argv[0], "-") == 0) {
+			pr_warning("  Error: '-' is not supported.\n");
+			usage_with_options(probe_usage, options);
+		}
+		ret = parse_probe_event_argv(argc, argv);
+		if (ret < 0) {
+			pr_err_with_code("  Error: Command Parse Error.", ret);
+			return ret;
+		}
+	}
+
+	if (params.quiet) {
+		if (verbose != 0) {
+			pr_err("  Error: -v and -q are exclusive.\n");
+			return -EINVAL;
+		}
+		verbose = -1;
+	}
+
+	if (params.max_probe_points == 0)
+		params.max_probe_points = MAX_PROBES;
+
+	if ((!params.nevents && !params.dellist && !params.list_events &&
+	     !params.show_lines && !params.show_funcs))
+		usage_with_options(probe_usage, options);
+
+	/*
+	 * Only consider the user's kernel image path if given.
+	 */
+	symbol_conf.try_vmlinux_path = (symbol_conf.vmlinux_name == NULL);
+
+	if (params.list_events) {
+		if (params.uprobes) {
+			pr_warning("  Error: Don't use --list with --exec.\n");
+			usage_with_options(probe_usage, options);
+		}
+		ret = show_perf_probe_events();
+		if (ret < 0)
+			pr_err_with_code("  Error: Failed to show event list.", ret);
+		return ret;
+	}
+	if (params.show_funcs) {
+		if (!params.filter)
+			params.filter = strfilter__new(DEFAULT_FUNC_FILTER,
+						       NULL);
+		ret = show_available_funcs(params.target, params.filter,
+					params.uprobes);
+		strfilter__delete(params.filter);
+		params.filter = NULL;
+		if (ret < 0)
+			pr_err_with_code("  Error: Failed to show functions.", ret);
+		return ret;
+	}
+
+#ifdef HAVE_DWARF_SUPPORT
+	if (params.show_lines) {
+		ret = show_line_range(&params.line_range, params.target,
+				      params.uprobes);
+		if (ret < 0)
+			pr_err_with_code("  Error: Failed to show lines.", ret);
+		return ret;
+	}
+	if (params.show_vars) {
+		if (!params.filter)
+			params.filter = strfilter__new(DEFAULT_VAR_FILTER,
+						       NULL);
+
+		ret = show_available_vars(params.events, params.nevents,
+					  params.max_probe_points,
+					  params.target,
+					  params.filter,
+					  params.show_ext_vars);
+		strfilter__delete(params.filter);
+		params.filter = NULL;
+		if (ret < 0)
+			pr_err_with_code("  Error: Failed to show vars.", ret);
+		return ret;
+	}
+#endif
+
+	if (params.dellist) {
+		ret = del_perf_probe_events(params.dellist);
+		if (ret < 0) {
+			pr_err_with_code("  Error: Failed to delete events.", ret);
+			return ret;
+		}
+	}
+
+	if (params.nevents) {
+		/* Ensure the last given target is used */
+		if (params.target && !params.target_used) {
+			pr_warning("  Error: -x/-m must follow the probe definitions.\n");
+			usage_with_options(probe_usage, options);
+		}
+
+		ret = add_perf_probe_events(params.events, params.nevents,
+					    params.max_probe_points,
+					    params.force_add);
+		if (ret < 0) {
+			pr_err_with_code("  Error: Failed to add events.", ret);
+			return ret;
+		}
+	}
+	return 0;
+}
+
+int cmd_probe(int argc, const char **argv, const char *prefix)
+{
+	int ret;
+
+	ret = init_params();
+	if (!ret) {
+		ret = __cmd_probe(argc, argv, prefix);
+		cleanup_params();
+	}
+
+	return ret;
+}