1 files changed, 386 insertions, 0 deletions

diff --git a/kernel/tools/perf/builtin-annotate.c b/kernel/tools/perf/builtin-annotate.c
new file mode 100644
index 000000000..71bf7451c
--- /dev/null
+++ b/kernel/tools/perf/builtin-annotate.c
@@ -0,0 +1,386 @@
+/*
+ * builtin-annotate.c
+ *
+ * Builtin annotate command: Analyze the perf.data input file,
+ * look up and read DSOs and symbol information and display
+ * a histogram of results, along various sorting keys.
+ */
+#include "builtin.h"
+
+#include "util/util.h"
+#include "util/color.h"
+#include <linux/list.h>
+#include "util/cache.h"
+#include <linux/rbtree.h>
+#include "util/symbol.h"
+
+#include "perf.h"
+#include "util/debug.h"
+
+#include "util/evlist.h"
+#include "util/evsel.h"
+#include "util/annotate.h"
+#include "util/event.h"
+#include "util/parse-options.h"
+#include "util/parse-events.h"
+#include "util/thread.h"
+#include "util/sort.h"
+#include "util/hist.h"
+#include "util/session.h"
+#include "util/tool.h"
+#include "util/data.h"
+#include "arch/common.h"
+
+#include <dlfcn.h>
+#include <linux/bitmap.h>
+
+struct perf_annotate {
+	struct perf_tool tool;
+	struct perf_session *session;
+	bool	   use_tui, use_stdio, use_gtk;
+	bool	   full_paths;
+	bool	   print_line;
+	bool	   skip_missing;
+	const char *sym_hist_filter;
+	const char *cpu_list;
+	DECLARE_BITMAP(cpu_bitmap, MAX_NR_CPUS);
+};
+
+static int perf_evsel__add_sample(struct perf_evsel *evsel,
+				  struct perf_sample *sample __maybe_unused,
+				  struct addr_location *al,
+				  struct perf_annotate *ann)
+{
+	struct hists *hists = evsel__hists(evsel);
+	struct hist_entry *he;
+	int ret;
+
+	if (ann->sym_hist_filter != NULL &&
+	    (al->sym == NULL ||
+	     strcmp(ann->sym_hist_filter, al->sym->name) != 0)) {
+		/* We're only interested in a symbol named sym_hist_filter */
+		if (al->sym != NULL) {
+			rb_erase(&al->sym->rb_node,
+				 &al->map->dso->symbols[al->map->type]);
+			symbol__delete(al->sym);
+		}
+		return 0;
+	}
+
+	he = __hists__add_entry(hists, al, NULL, NULL, NULL, 1, 1, 0, true);
+	if (he == NULL)
+		return -ENOMEM;
+
+	ret = hist_entry__inc_addr_samples(he, evsel->idx, al->addr);
+	hists__inc_nr_samples(hists, true);
+	return ret;
+}
+
+static int process_sample_event(struct perf_tool *tool,
+				union perf_event *event,
+				struct perf_sample *sample,
+				struct perf_evsel *evsel,
+				struct machine *machine)
+{
+	struct perf_annotate *ann = container_of(tool, struct perf_annotate, tool);
+	struct addr_location al;
+
+	if (perf_event__preprocess_sample(event, machine, &al, sample) < 0) {
+		pr_warning("problem processing %d event, skipping it.\n",
+			   event->header.type);
+		return -1;
+	}
+
+	if (ann->cpu_list && !test_bit(sample->cpu, ann->cpu_bitmap))
+		return 0;
+
+	if (!al.filtered && perf_evsel__add_sample(evsel, sample, &al, ann)) {
+		pr_warning("problem incrementing symbol count, "
+			   "skipping event\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+static int hist_entry__tty_annotate(struct hist_entry *he,
+				    struct perf_evsel *evsel,
+				    struct perf_annotate *ann)
+{
+	return symbol__tty_annotate(he->ms.sym, he->ms.map, evsel,
+				    ann->print_line, ann->full_paths, 0, 0);
+}
+
+static void hists__find_annotations(struct hists *hists,
+				    struct perf_evsel *evsel,
+				    struct perf_annotate *ann)
+{
+	struct rb_node *nd = rb_first(&hists->entries), *next;
+	int key = K_RIGHT;
+
+	while (nd) {
+		struct hist_entry *he = rb_entry(nd, struct hist_entry, rb_node);
+		struct annotation *notes;
+
+		if (he->ms.sym == NULL || he->ms.map->dso->annotate_warned)
+			goto find_next;
+
+		notes = symbol__annotation(he->ms.sym);
+		if (notes->src == NULL) {
+find_next:
+			if (key == K_LEFT)
+				nd = rb_prev(nd);
+			else
+				nd = rb_next(nd);
+			continue;
+		}
+
+		if (use_browser == 2) {
+			int ret;
+			int (*annotate)(struct hist_entry *he,
+					struct perf_evsel *evsel,
+					struct hist_browser_timer *hbt);
+
+			annotate = dlsym(perf_gtk_handle,
+					 "hist_entry__gtk_annotate");
+			if (annotate == NULL) {
+				ui__error("GTK browser not found!\n");
+				return;
+			}
+
+			ret = annotate(he, evsel, NULL);
+			if (!ret || !ann->skip_missing)
+				return;
+
+			/* skip missing symbols */
+			nd = rb_next(nd);
+		} else if (use_browser == 1) {
+			key = hist_entry__tui_annotate(he, evsel, NULL);
+			switch (key) {
+			case -1:
+				if (!ann->skip_missing)
+					return;
+				/* fall through */
+			case K_RIGHT:
+				next = rb_next(nd);
+				break;
+			case K_LEFT:
+				next = rb_prev(nd);
+				break;
+			default:
+				return;
+			}
+
+			if (next != NULL)
+				nd = next;
+		} else {
+			hist_entry__tty_annotate(he, evsel, ann);
+			nd = rb_next(nd);
+			/*
+			 * Since we have a hist_entry per IP for the same
+			 * symbol, free he->ms.sym->src to signal we already
+			 * processed this symbol.
+			 */
+			zfree(&notes->src);
+		}
+	}
+}
+
+static int __cmd_annotate(struct perf_annotate *ann)
+{
+	int ret;
+	struct perf_session *session = ann->session;
+	struct perf_evsel *pos;
+	u64 total_nr_samples;
+
+	machines__set_symbol_filter(&session->machines, symbol__annotate_init);
+
+	if (ann->cpu_list) {
+		ret = perf_session__cpu_bitmap(session, ann->cpu_list,
+					       ann->cpu_bitmap);
+		if (ret)
+			goto out;
+	}
+
+	if (!objdump_path) {
+		ret = perf_session_env__lookup_objdump(&session->header.env);
+		if (ret)
+			goto out;
+	}
+
+	ret = perf_session__process_events(session);
+	if (ret)
+		goto out;
+
+	if (dump_trace) {
+		perf_session__fprintf_nr_events(session, stdout);
+		perf_evlist__fprintf_nr_events(session->evlist, stdout);
+		goto out;
+	}
+
+	if (verbose > 3)
+		perf_session__fprintf(session, stdout);
+
+	if (verbose > 2)
+		perf_session__fprintf_dsos(session, stdout);
+
+	total_nr_samples = 0;
+	evlist__for_each(session->evlist, pos) {
+		struct hists *hists = evsel__hists(pos);
+		u32 nr_samples = hists->stats.nr_events[PERF_RECORD_SAMPLE];
+
+		if (nr_samples > 0) {
+			total_nr_samples += nr_samples;
+			hists__collapse_resort(hists, NULL);
+			hists__output_resort(hists, NULL);
+
+			if (symbol_conf.event_group &&
+			    !perf_evsel__is_group_leader(pos))
+				continue;
+
+			hists__find_annotations(hists, pos, ann);
+		}
+	}
+
+	if (total_nr_samples == 0) {
+		ui__error("The %s file has no samples!\n", session->file->path);
+		goto out;
+	}
+
+	if (use_browser == 2) {
+		void (*show_annotations)(void);
+
+		show_annotations = dlsym(perf_gtk_handle,
+					 "perf_gtk__show_annotations");
+		if (show_annotations == NULL) {
+			ui__error("GTK browser not found!\n");
+			goto out;
+		}
+		show_annotations();
+	}
+
+out:
+	return ret;
+}
+
+static const char * const annotate_usage[] = {
+	"perf annotate [<options>]",
+	NULL
+};
+
+int cmd_annotate(int argc, const char **argv, const char *prefix __maybe_unused)
+{
+	struct perf_annotate annotate = {
+		.tool = {
+			.sample	= process_sample_event,
+			.mmap	= perf_event__process_mmap,
+			.mmap2	= perf_event__process_mmap2,
+			.comm	= perf_event__process_comm,
+			.exit	= perf_event__process_exit,
+			.fork	= perf_event__process_fork,
+			.ordered_events = true,
+			.ordering_requires_timestamps = true,
+		},
+	};
+	struct perf_data_file file = {
+		.path  = input_name,
+		.mode  = PERF_DATA_MODE_READ,
+	};
+	const struct option options[] = {
+	OPT_STRING('i', "input", &input_name, "file",
+		    "input file name"),
+	OPT_STRING('d', "dsos", &symbol_conf.dso_list_str, "dso[,dso...]",
+		   "only consider symbols in these dsos"),
+	OPT_STRING('s', "symbol", &annotate.sym_hist_filter, "symbol",
+		    "symbol to annotate"),
+	OPT_BOOLEAN('f', "force", &file.force, "don't complain, do it"),
+	OPT_INCR('v', "verbose", &verbose,
+		    "be more verbose (show symbol address, etc)"),
+	OPT_BOOLEAN('D', "dump-raw-trace", &dump_trace,
+		    "dump raw trace in ASCII"),
+	OPT_BOOLEAN(0, "gtk", &annotate.use_gtk, "Use the GTK interface"),
+	OPT_BOOLEAN(0, "tui", &annotate.use_tui, "Use the TUI interface"),
+	OPT_BOOLEAN(0, "stdio", &annotate.use_stdio, "Use the stdio interface"),
+	OPT_STRING('k', "vmlinux", &symbol_conf.vmlinux_name,
+		   "file", "vmlinux pathname"),
+	OPT_BOOLEAN('m', "modules", &symbol_conf.use_modules,
+		    "load module symbols - WARNING: use only with -k and LIVE kernel"),
+	OPT_BOOLEAN('l', "print-line", &annotate.print_line,
+		    "print matching source lines (may be slow)"),
+	OPT_BOOLEAN('P', "full-paths", &annotate.full_paths,
+		    "Don't shorten the displayed pathnames"),
+	OPT_BOOLEAN(0, "skip-missing", &annotate.skip_missing,
+		    "Skip symbols that cannot be annotated"),
+	OPT_STRING('C', "cpu", &annotate.cpu_list, "cpu", "list of cpus to profile"),
+	OPT_STRING(0, "symfs", &symbol_conf.symfs, "directory",
+		   "Look for files with symbols relative to this directory"),
+	OPT_BOOLEAN(0, "source", &symbol_conf.annotate_src,
+		    "Interleave source code with assembly code (default)"),
+	OPT_BOOLEAN(0, "asm-raw", &symbol_conf.annotate_asm_raw,
+		    "Display raw encoding of assembly instructions (default)"),
+	OPT_STRING('M', "disassembler-style", &disassembler_style, "disassembler style",
+		   "Specify disassembler style (e.g. -M intel for intel syntax)"),
+	OPT_STRING(0, "objdump", &objdump_path, "path",
+		   "objdump binary to use for disassembly and annotations"),
+	OPT_BOOLEAN(0, "group", &symbol_conf.event_group,
+		    "Show event group information together"),
+	OPT_END()
+	};
+	int ret = hists__init();
+
+	if (ret < 0)
+		return ret;
+
+	argc = parse_options(argc, argv, options, annotate_usage, 0);
+
+	if (annotate.use_stdio)
+		use_browser = 0;
+	else if (annotate.use_tui)
+		use_browser = 1;
+	else if (annotate.use_gtk)
+		use_browser = 2;
+
+	setup_browser(true);
+
+	annotate.session = perf_session__new(&file, false, &annotate.tool);
+	if (annotate.session == NULL)
+		return -1;
+
+	symbol_conf.priv_size = sizeof(struct annotation);
+	symbol_conf.try_vmlinux_path = true;
+
+	ret = symbol__init(&annotate.session->header.env);
+	if (ret < 0)
+		goto out_delete;
+
+	if (setup_sorting() < 0)
+		usage_with_options(annotate_usage, options);
+
+	if (argc) {
+		/*
+		 * Special case: if there's an argument left then assume that
+		 * it's a symbol filter:
+		 */
+		if (argc > 1)
+			usage_with_options(annotate_usage, options);
+
+		annotate.sym_hist_filter = argv[0];
+	}
+
+	ret = __cmd_annotate(&annotate);
+
+out_delete:
+	/*
+	 * Speed up the exit process, for large files this can
+	 * take quite a while.
+	 *
+	 * XXX Enable this when using valgrind or if we ever
+	 * librarize this command.
+	 *
+	 * Also experiment with obstacks to see how much speed
+	 * up we'll get here.
+	 *
+	 * perf_session__delete(session);
+	 */
+	return ret;
+}