Merge branch 'master' of /home/davem/src/GIT/linux-2.6/

Conflicts:
	include/linux/mod_devicetable.h
	scripts/mod/file2alias.c

1 files changed, 95 insertions, 191 deletions

diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index 152d6c9b1fa4..61c6d70732c9 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -36,13 +36,10 @@
 #include "builtin.h"
 #include "util/util.h"
 #include "util/strlist.h"
-#include "util/event.h"
+#include "util/symbol.h"
 #include "util/debug.h"
 #include "util/debugfs.h"
-#include "util/symbol.h"
-#include "util/thread.h"
 #include "util/parse-options.h"
-#include "util/parse-events.h"  /* For debugfs_path */
 #include "util/probe-finder.h"
 #include "util/probe-event.h"
 
@@ -50,103 +47,84 @@
 
 /* Session management structure */
 static struct {
-        bool need_dwarf;
         bool list_events;
         bool force_add;
         bool show_lines;
-        int nr_probe;
-        struct probe_point probes[MAX_PROBES];
+        int nevents;
+        struct perf_probe_event events[MAX_PROBES];
         struct strlist *dellist;
-        struct map_groups kmap_groups;
-        struct map *kmaps[MAP__NR_TYPES];
         struct line_range line_range;
-} session;
+        int max_probe_points;
+} params;
 
 
 /* Parse an event definition. Note that any error must die. */
-static void parse_probe_event(const char *str)
+static int parse_probe_event(const char *str)
 {
-        struct probe_point *pp = &session.probes[session.nr_probe];
+        struct perf_probe_event *pev = &params.events[params.nevents];
+        int ret;
 
-        pr_debug("probe-definition(%d): %s\n", session.nr_probe, str);
-        if (++session.nr_probe == MAX_PROBES)
+        pr_debug("probe-definition(%d): %s\n", params.nevents, str);
+        if (++params.nevents == MAX_PROBES)
                 die("Too many probes (> %d) are specified.", MAX_PROBES);
 
-        /* Parse perf-probe event into probe_point */
-        parse_perf_probe_event(str, pp, &session.need_dwarf);
+        /* Parse a perf-probe command into event */
+        ret = parse_perf_probe_command(str, pev);
+        pr_debug("%d arguments\n", pev->nargs);
 
-        pr_debug("%d arguments\n", pp->nr_args);
+        return ret;
 }
 
-static void parse_probe_event_argv(int argc, const char **argv)
+static int parse_probe_event_argv(int argc, const char **argv)
 {
-        int i, len;
+        int i, len, ret;
         char *buf;
 
         /* Bind up rest arguments */
         len = 0;
         for (i = 0; i < argc; i++)
                 len += strlen(argv[i]) + 1;
-        buf = zalloc(len + 1);
-        if (!buf)
-                die("Failed to allocate memory for binding arguments.");
+        buf = xzalloc(len + 1);
         len = 0;
         for (i = 0; i < argc; i++)
                 len += sprintf(&buf[len], "%s ", argv[i]);
-        parse_probe_event(buf);
+        ret = parse_probe_event(buf);
         free(buf);
+        return ret;
 }
 
 static int opt_add_probe_event(const struct option *opt __used,
                               const char *str, int unset __used)
 {
         if (str)
-                parse_probe_event(str);
-        return 0;
+                return parse_probe_event(str);
+        else
+                return 0;
 }
 
 static int opt_del_probe_event(const struct option *opt __used,
                                const char *str, int unset __used)
 {
         if (str) {
-                if (!session.dellist)
-                        session.dellist = strlist__new(true, NULL);
-                strlist__add(session.dellist, str);
+                if (!params.dellist)
+                        params.dellist = strlist__new(true, NULL);
+                strlist__add(params.dellist, str);
         }
         return 0;
 }
 
-/* Currently just checking function name from symbol map */
-static void evaluate_probe_point(struct probe_point *pp)
-{
-        struct symbol *sym;
-        sym = map__find_symbol_by_name(session.kmaps[MAP__FUNCTION],
-                                       pp->function, NULL);
-        if (!sym)
-                die("Kernel symbol \'%s\' not found - probe not added.",
-                    pp->function);
-}
-
-#ifndef NO_DWARF_SUPPORT
-static int open_vmlinux(void)
-{
-        if (map__load(session.kmaps[MAP__FUNCTION], NULL) < 0) {
-                pr_debug("Failed to load kernel map.\n");
-                return -EINVAL;
-        }
-        pr_debug("Try to open %s\n",
-                 session.kmaps[MAP__FUNCTION]->dso->long_name);
-        return open(session.kmaps[MAP__FUNCTION]->dso->long_name, O_RDONLY);
-}
-
+#ifdef DWARF_SUPPORT
 static int opt_show_lines(const struct option *opt __used,
                           const char *str, int unset __used)
 {
+        int ret = 0;
+
         if (str)
-                parse_line_range_desc(str, &session.line_range);
-        INIT_LIST_HEAD(&session.line_range.line_list);
-        session.show_lines = true;
-        return 0;
+                ret = parse_line_range_desc(str, &params.line_range);
+        INIT_LIST_HEAD(&params.line_range.line_list);
+        params.show_lines = true;
+
+        return ret;
 }
 #endif
 
@@ -155,29 +133,25 @@ static const char * const probe_usage[] = {
         "perf probe [<options>] --add 'PROBEDEF' [--add 'PROBEDEF' ...]",
         "perf probe [<options>] --del '[GROUP:]EVENT' ...",
         "perf probe --list",
-#ifndef NO_DWARF_SUPPORT
+#ifdef DWARF_SUPPORT
         "perf probe --line 'LINEDESC'",
 #endif
         NULL
 };
 
 static const struct option options[] = {
-        OPT_BOOLEAN('v', "verbose", &verbose,
+        OPT_INCR('v', "verbose", &verbose,
                     "be more verbose (show parsed arguments, etc)"),
-#ifndef NO_DWARF_SUPPORT
-        OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
-                   "file", "vmlinux pathname"),
-#endif
-        OPT_BOOLEAN('l', "list", &session.list_events,
+        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 NO_DWARF_SUPPORT
-                "[EVENT=]FUNC[+OFF|%return] [ARG ...]",
-#else
+#ifdef DWARF_SUPPORT
                 "[EVENT=]FUNC[@SRC][+OFF|%return|:RL|;PT]|SRC:AL|SRC;PT"
-                " [ARG ...]",
+                " [[NAME=]ARG ...]",
+#else
+                "[EVENT=]FUNC[+OFF|%return] [[NAME=]ARG ...]",
 #endif
                 "probe point definition, where\n"
                 "\t\tGROUP:\tGroup name (optional)\n"
@@ -185,51 +159,35 @@ static const struct option options[] = {
                 "\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 NO_DWARF_SUPPORT
-                "\t\tARG:\tProbe argument (only \n"
-#else
+#ifdef 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"
-#endif
                 "\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", &session.force_add, "forcibly add events"
+        OPT_BOOLEAN('f', "force", &params.force_add, "forcibly add events"
                     " with existing name"),
-#ifndef NO_DWARF_SUPPORT
+#ifdef DWARF_SUPPORT
         OPT_CALLBACK('L', "line", NULL,
-                     "FUNC[:RLN[+NUM|:RLN2]]|SRC:ALN[+NUM|:ALN2]",
+                     "FUNC[:RLN[+NUM|-RLN2]]|SRC:ALN[+NUM|-ALN2]",
                      "Show source code lines.", opt_show_lines),
+        OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
+                   "file", "vmlinux pathname"),
 #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_END()
 };
 
-/* Initialize symbol maps for vmlinux */
-static void init_vmlinux(void)
-{
-        symbol_conf.sort_by_name = true;
-        if (symbol_conf.vmlinux_name == NULL)
-                symbol_conf.try_vmlinux_path = true;
-        else
-                pr_debug("Use vmlinux: %s\n", symbol_conf.vmlinux_name);
-        if (symbol__init() < 0)
-                die("Failed to init symbol map.");
-
-        map_groups__init(&session.kmap_groups);
-        if (map_groups__create_kernel_maps(&session.kmap_groups,
-                                           session.kmaps) < 0)
-                die("Failed to create kernel maps.");
-}
-
 int cmd_probe(int argc, const char **argv, const char *prefix __used)
 {
-        int i, ret;
-#ifndef NO_DWARF_SUPPORT
-        int fd;
-#endif
-        struct probe_point *pp;
+        int ret;
 
         argc = parse_options(argc, argv, options, probe_usage,
                              PARSE_OPT_STOP_AT_NON_OPTION);
@@ -238,123 +196,69 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
                         pr_warning("  Error: '-' is not supported.\n");
                         usage_with_options(probe_usage, options);
                 }
-                parse_probe_event_argv(argc, argv);
+                ret = parse_probe_event_argv(argc, argv);
+                if (ret < 0) {
+                        pr_err("  Error: Parse Error.  (%d)\n", ret);
+                        return ret;
+                }
         }
 
-        if ((!session.nr_probe && !session.dellist && !session.list_events &&
-             !session.show_lines))
-                usage_with_options(probe_usage, options);
+        if (params.max_probe_points == 0)
+                params.max_probe_points = MAX_PROBES;
 
-        if (debugfs_valid_mountpoint(debugfs_path) < 0)
-                die("Failed to find debugfs path.");
+        if ((!params.nevents && !params.dellist && !params.list_events &&
+             !params.show_lines))
+                usage_with_options(probe_usage, options);
 
-        if (session.list_events) {
-                if (session.nr_probe != 0 || session.dellist) {
-                        pr_warning("  Error: Don't use --list with"
-                                   " --add/--del.\n");
+        if (params.list_events) {
+                if (params.nevents != 0 || params.dellist) {
+                        pr_err("  Error: Don't use --list with --add/--del.\n");
                         usage_with_options(probe_usage, options);
                 }
-                if (session.show_lines) {
-                        pr_warning("  Error: Don't use --list with --line.\n");
+                if (params.show_lines) {
+                        pr_err("  Error: Don't use --list with --line.\n");
                         usage_with_options(probe_usage, options);
                 }
-                show_perf_probe_events();
-                return 0;
+                ret = show_perf_probe_events();
+                if (ret < 0)
+                        pr_err("  Error: Failed to show event list. (%d)\n",
+                               ret);
+                return ret;
         }
 
-#ifndef NO_DWARF_SUPPORT
-        if (session.show_lines) {
-                if (session.nr_probe != 0 || session.dellist) {
+#ifdef DWARF_SUPPORT
+        if (params.show_lines) {
+                if (params.nevents != 0 || params.dellist) {
                         pr_warning("  Error: Don't use --line with"
                                    " --add/--del.\n");
                         usage_with_options(probe_usage, options);
                 }
-                init_vmlinux();
-                fd = open_vmlinux();
-                if (fd < 0)
-                        die("Could not open debuginfo file.");
-                ret = find_line_range(fd, &session.line_range);
-                if (ret <= 0)
-                        die("Source line is not found.\n");
-                close(fd);
-                show_line_range(&session.line_range);
-                return 0;
-        }
-#endif
 
-        if (session.dellist) {
-                del_trace_kprobe_events(session.dellist);
-                strlist__delete(session.dellist);
-                if (session.nr_probe == 0)
-                        return 0;
+                ret = show_line_range(&params.line_range);
+                if (ret < 0)
+                        pr_err("  Error: Failed to show lines. (%d)\n", ret);
+                return ret;
         }
+#endif
 
-        /* Add probes */
-        init_vmlinux();
-
-        if (session.need_dwarf)
-#ifdef NO_DWARF_SUPPORT
-                die("Debuginfo-analysis is not supported");
-#else   /* !NO_DWARF_SUPPORT */
-                pr_debug("Some probes require debuginfo.\n");
-
-        fd = open_vmlinux();
-        if (fd < 0) {
-                if (session.need_dwarf)
-                        die("Could not open debuginfo file.");
-
-                pr_debug("Could not open vmlinux/module file."
-                         " Try to use symbols.\n");
-                goto end_dwarf;
-        }
-
-        /* Searching probe points */
-        for (i = 0; i < session.nr_probe; i++) {
-                pp = &session.probes[i];
-                if (pp->found)
-                        continue;
-
-                lseek(fd, SEEK_SET, 0);
-                ret = find_probe_point(fd, pp);
-                if (ret > 0)
-                        continue;
-                if (ret == 0) { /* No error but failed to find probe point. */
-                        synthesize_perf_probe_point(pp);
-                        die("Probe point '%s' not found. - probe not added.",
-                            pp->probes[0]);
-                }
-                /* Error path */
-                if (session.need_dwarf) {
-                        if (ret == -ENOENT)
-                                pr_warning("No dwarf info found in the vmlinux - please rebuild with CONFIG_DEBUG_INFO=y.\n");
-                        die("Could not analyze debuginfo.");
+        if (params.dellist) {
+                ret = del_perf_probe_events(params.dellist);
+                strlist__delete(params.dellist);
+                if (ret < 0) {
+                        pr_err("  Error: Failed to delete events. (%d)\n", ret);
+                        return ret;
                 }
-                pr_debug("An error occurred in debuginfo analysis."
-                         " Try to use symbols.\n");
-                break;
         }
-        close(fd);
-
-end_dwarf:
-#endif /* !NO_DWARF_SUPPORT */
 
-        /* Synthesize probes without dwarf */
-        for (i = 0; i < session.nr_probe; i++) {
-                pp = &session.probes[i];
-                if (pp->found)  /* This probe is already found. */
-                        continue;
-
-                evaluate_probe_point(pp);
-                ret = synthesize_trace_kprobe_event(pp);
-                if (ret == -E2BIG)
-                        die("probe point definition becomes too long.");
-                else if (ret < 0)
-                        die("Failed to synthesize a probe point.");
+        if (params.nevents) {
+                ret = add_perf_probe_events(params.events, params.nevents,
+                                            params.force_add,
+                                            params.max_probe_points);
+                if (ret < 0) {
+                        pr_err("  Error: Failed to add events. (%d)\n", ret);
+                        return ret;
+                }
         }
-
-        /* Settng up probe points */
-        add_trace_kprobe_events(session.probes, session.nr_probe,
-                                session.force_add);
         return 0;
 }