1 files changed, 542 insertions, 0 deletions
diff --git a/ANDROID_3.4.5/tools/perf/util/trace-event-info.c b/ANDROID_3.4.5/tools/perf/util/trace-event-info.c
new file mode 100644
index 00000000..fc22cf5c
--- /dev/null
+++ b/ANDROID_3.4.5/tools/perf/util/trace-event-info.c
@@ -0,0 +1,542 @@
+/*
+ * Copyright (C) 2008,2009, Steven Rostedt <srostedt@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; version 2 of the License (not later!)
+ *
+ * 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 "util.h"
+#include <dirent.h>
+#include <mntent.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdarg.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+#include <pthread.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <errno.h>
+#include <stdbool.h>
+#include <linux/list.h>
+#include <linux/kernel.h>
+
+#include "../perf.h"
+#include "trace-event.h"
+#include "debugfs.h"
+#include "evsel.h"
+
+#define VERSION "0.5"
+
+#define TRACE_CTRL	"tracing_on"
+#define TRACE		"trace"
+#define AVAILABLE	"available_tracers"
+#define CURRENT		"current_tracer"
+#define ITER_CTRL	"trace_options"
+#define MAX_LATENCY	"tracing_max_latency"
+
+unsigned int page_size;
+
+static const char *output_file = "trace.info";
+static int output_fd;
+
+struct event_list {
+	struct event_list *next;
+	const char *event;
+};
+
+struct events {
+	struct events *sibling;
+	struct events *children;
+	struct events *next;
+	char *name;
+};
+
+
+void *malloc_or_die(unsigned int size)
+{
+	void *data;
+
+	data = malloc(size);
+	if (!data)
+		die("malloc");
+	return data;
+}
+
+static const char *find_debugfs(void)
+{
+	const char *path = debugfs_mount(NULL);
+
+	if (!path)
+		die("Your kernel not support debugfs filesystem");
+
+	return path;
+}
+
+/*
+ * Finds the path to the debugfs/tracing
+ * Allocates the string and stores it.
+ */
+static const char *find_tracing_dir(void)
+{
+	static char *tracing;
+	static int tracing_found;
+	const char *debugfs;
+
+	if (tracing_found)
+		return tracing;
+
+	debugfs = find_debugfs();
+
+	tracing = malloc_or_die(strlen(debugfs) + 9);
+
+	sprintf(tracing, "%s/tracing", debugfs);
+
+	tracing_found = 1;
+	return tracing;
+}
+
+static char *get_tracing_file(const char *name)
+{
+	const char *tracing;
+	char *file;
+
+	tracing = find_tracing_dir();
+	if (!tracing)
+		return NULL;
+
+	file = malloc_or_die(strlen(tracing) + strlen(name) + 2);
+
+	sprintf(file, "%s/%s", tracing, name);
+	return file;
+}
+
+static void put_tracing_file(char *file)
+{
+	free(file);
+}
+
+static ssize_t calc_data_size;
+
+static ssize_t write_or_die(const void *buf, size_t len)
+{
+	int ret;
+
+	if (calc_data_size) {
+		calc_data_size += len;
+		return len;
+	}
+
+	ret = write(output_fd, buf, len);
+	if (ret < 0)
+		die("writing to '%s'", output_file);
+
+	return ret;
+}
+
+int bigendian(void)
+{
+	unsigned char str[] = { 0x1, 0x2, 0x3, 0x4, 0x0, 0x0, 0x0, 0x0};
+	unsigned int *ptr;
+
+	ptr = (unsigned int *)(void *)str;
+	return *ptr == 0x01020304;
+}
+
+/* unfortunately, you can not stat debugfs or proc files for size */
+static void record_file(const char *file, size_t hdr_sz)
+{
+	unsigned long long size = 0;
+	char buf[BUFSIZ], *sizep;
+	off_t hdr_pos = lseek(output_fd, 0, SEEK_CUR);
+	int r, fd;
+
+	fd = open(file, O_RDONLY);
+	if (fd < 0)
+		die("Can't read '%s'", file);
+
+	/* put in zeros for file size, then fill true size later */
+	if (hdr_sz)
+		write_or_die(&size, hdr_sz);
+
+	do {
+		r = read(fd, buf, BUFSIZ);
+		if (r > 0) {
+			size += r;
+			write_or_die(buf, r);
+		}
+	} while (r > 0);
+	close(fd);
+
+	/* ugh, handle big-endian hdr_size == 4 */
+	sizep = (char*)&size;
+	if (bigendian())
+		sizep += sizeof(u64) - hdr_sz;
+
+	if (hdr_sz && pwrite(output_fd, sizep, hdr_sz, hdr_pos) < 0)
+		die("writing to %s", output_file);
+}
+
+static void read_header_files(void)
+{
+	char *path;
+	struct stat st;
+
+	path = get_tracing_file("events/header_page");
+	if (stat(path, &st) < 0)
+		die("can't read '%s'", path);
+
+	write_or_die("header_page", 12);
+	record_file(path, 8);
+	put_tracing_file(path);
+
+	path = get_tracing_file("events/header_event");
+	if (stat(path, &st) < 0)
+		die("can't read '%s'", path);
+
+	write_or_die("header_event", 13);
+	record_file(path, 8);
+	put_tracing_file(path);
+}
+
+static bool name_in_tp_list(char *sys, struct tracepoint_path *tps)
+{
+	while (tps) {
+		if (!strcmp(sys, tps->name))
+			return true;
+		tps = tps->next;
+	}
+
+	return false;
+}
+
+static void copy_event_system(const char *sys, struct tracepoint_path *tps)
+{
+	struct dirent *dent;
+	struct stat st;
+	char *format;
+	DIR *dir;
+	int count = 0;
+	int ret;
+
+	dir = opendir(sys);
+	if (!dir)
+		die("can't read directory '%s'", sys);
+
+	while ((dent = readdir(dir))) {
+		if (dent->d_type != DT_DIR ||
+		    strcmp(dent->d_name, ".") == 0 ||
+		    strcmp(dent->d_name, "..") == 0 ||
+		    !name_in_tp_list(dent->d_name, tps))
+			continue;
+		format = malloc_or_die(strlen(sys) + strlen(dent->d_name) + 10);
+		sprintf(format, "%s/%s/format", sys, dent->d_name);
+		ret = stat(format, &st);
+		free(format);
+		if (ret < 0)
+			continue;
+		count++;
+	}
+
+	write_or_die(&count, 4);
+
+	rewinddir(dir);
+	while ((dent = readdir(dir))) {
+		if (dent->d_type != DT_DIR ||
+		    strcmp(dent->d_name, ".") == 0 ||
+		    strcmp(dent->d_name, "..") == 0 ||
+		    !name_in_tp_list(dent->d_name, tps))
+			continue;
+		format = malloc_or_die(strlen(sys) + strlen(dent->d_name) + 10);
+		sprintf(format, "%s/%s/format", sys, dent->d_name);
+		ret = stat(format, &st);
+
+		if (ret >= 0)
+			record_file(format, 8);
+
+		free(format);
+	}
+	closedir(dir);
+}
+
+static void read_ftrace_files(struct tracepoint_path *tps)
+{
+	char *path;
+
+	path = get_tracing_file("events/ftrace");
+
+	copy_event_system(path, tps);
+
+	put_tracing_file(path);
+}
+
+static bool system_in_tp_list(char *sys, struct tracepoint_path *tps)
+{
+	while (tps) {
+		if (!strcmp(sys, tps->system))
+			return true;
+		tps = tps->next;
+	}
+
+	return false;
+}
+
+static void read_event_files(struct tracepoint_path *tps)
+{
+	struct dirent *dent;
+	struct stat st;
+	char *path;
+	char *sys;
+	DIR *dir;
+	int count = 0;
+	int ret;
+
+	path = get_tracing_file("events");
+
+	dir = opendir(path);
+	if (!dir)
+		die("can't read directory '%s'", path);
+
+	while ((dent = readdir(dir))) {
+		if (dent->d_type != DT_DIR ||
+		    strcmp(dent->d_name, ".") == 0 ||
+		    strcmp(dent->d_name, "..") == 0 ||
+		    strcmp(dent->d_name, "ftrace") == 0 ||
+		    !system_in_tp_list(dent->d_name, tps))
+			continue;
+		count++;
+	}
+
+	write_or_die(&count, 4);
+
+	rewinddir(dir);
+	while ((dent = readdir(dir))) {
+		if (dent->d_type != DT_DIR ||
+		    strcmp(dent->d_name, ".") == 0 ||
+		    strcmp(dent->d_name, "..") == 0 ||
+		    strcmp(dent->d_name, "ftrace") == 0 ||
+		    !system_in_tp_list(dent->d_name, tps))
+			continue;
+		sys = malloc_or_die(strlen(path) + strlen(dent->d_name) + 2);
+		sprintf(sys, "%s/%s", path, dent->d_name);
+		ret = stat(sys, &st);
+		if (ret >= 0) {
+			write_or_die(dent->d_name, strlen(dent->d_name) + 1);
+			copy_event_system(sys, tps);
+		}
+		free(sys);
+	}
+
+	closedir(dir);
+	put_tracing_file(path);
+}
+
+static void read_proc_kallsyms(void)
+{
+	unsigned int size;
+	const char *path = "/proc/kallsyms";
+	struct stat st;
+	int ret;
+
+	ret = stat(path, &st);
+	if (ret < 0) {
+		/* not found */
+		size = 0;
+		write_or_die(&size, 4);
+		return;
+	}
+	record_file(path, 4);
+}
+
+static void read_ftrace_printk(void)
+{
+	unsigned int size;
+	char *path;
+	struct stat st;
+	int ret;
+
+	path = get_tracing_file("printk_formats");
+	ret = stat(path, &st);
+	if (ret < 0) {
+		/* not found */
+		size = 0;
+		write_or_die(&size, 4);
+		goto out;
+	}
+	record_file(path, 4);
+
+out:
+	put_tracing_file(path);
+}
+
+static struct tracepoint_path *
+get_tracepoints_path(struct list_head *pattrs)
+{
+	struct tracepoint_path path, *ppath = &path;
+	struct perf_evsel *pos;
+	int nr_tracepoints = 0;
+
+	list_for_each_entry(pos, pattrs, node) {
+		if (pos->attr.type != PERF_TYPE_TRACEPOINT)
+			continue;
+		++nr_tracepoints;
+		ppath->next = tracepoint_id_to_path(pos->attr.config);
+		if (!ppath->next)
+			die("%s\n", "No memory to alloc tracepoints list");
+		ppath = ppath->next;
+	}
+
+	return nr_tracepoints > 0 ? path.next : NULL;
+}
+
+static void
+put_tracepoints_path(struct tracepoint_path *tps)
+{
+	while (tps) {
+		struct tracepoint_path *t = tps;
+
+		tps = tps->next;
+		free(t->name);
+		free(t->system);
+		free(t);
+	}
+}
+
+bool have_tracepoints(struct list_head *pattrs)
+{
+	struct perf_evsel *pos;
+
+	list_for_each_entry(pos, pattrs, node)
+		if (pos->attr.type == PERF_TYPE_TRACEPOINT)
+			return true;
+
+	return false;
+}
+
+static void tracing_data_header(void)
+{
+	char buf[20];
+
+	/* just guessing this is someone's birthday.. ;) */
+	buf[0] = 23;
+	buf[1] = 8;
+	buf[2] = 68;
+	memcpy(buf + 3, "tracing", 7);
+
+	write_or_die(buf, 10);
+
+	write_or_die(VERSION, strlen(VERSION) + 1);
+
+	/* save endian */
+	if (bigendian())
+		buf[0] = 1;
+	else
+		buf[0] = 0;
+
+	write_or_die(buf, 1);
+
+	/* save size of long */
+	buf[0] = sizeof(long);
+	write_or_die(buf, 1);
+
+	/* save page_size */
+	page_size = sysconf(_SC_PAGESIZE);
+	write_or_die(&page_size, 4);
+}
+
+struct tracing_data *tracing_data_get(struct list_head *pattrs,
+				      int fd, bool temp)
+{
+	struct tracepoint_path *tps;
+	struct tracing_data *tdata;
+
+	output_fd = fd;
+
+	tps = get_tracepoints_path(pattrs);
+	if (!tps)
+		return NULL;
+
+	tdata = malloc_or_die(sizeof(*tdata));
+	tdata->temp = temp;
+	tdata->size = 0;
+
+	if (temp) {
+		int temp_fd;
+
+		snprintf(tdata->temp_file, sizeof(tdata->temp_file),
+			 "/tmp/perf-XXXXXX");
+		if (!mkstemp(tdata->temp_file))
+			die("Can't make temp file");
+
+		temp_fd = open(tdata->temp_file, O_RDWR);
+		if (temp_fd < 0)
+			die("Can't read '%s'", tdata->temp_file);
+
+		/*
+		 * Set the temp file the default output, so all the
+		 * tracing data are stored into it.
+		 */
+		output_fd = temp_fd;
+	}
+
+	tracing_data_header();
+	read_header_files();
+	read_ftrace_files(tps);
+	read_event_files(tps);
+	read_proc_kallsyms();
+	read_ftrace_printk();
+
+	/*
+	 * All tracing data are stored by now, we can restore
+	 * the default output file in case we used temp file.
+	 */
+	if (temp) {
+		tdata->size = lseek(output_fd, 0, SEEK_CUR);
+		close(output_fd);
+		output_fd = fd;
+	}
+
+	put_tracepoints_path(tps);
+	return tdata;
+}
+
+void tracing_data_put(struct tracing_data *tdata)
+{
+	if (tdata->temp) {
+		record_file(tdata->temp_file, 0);
+		unlink(tdata->temp_file);
+	}
+
+	free(tdata);
+}
+
+int read_tracing_data(int fd, struct list_head *pattrs)
+{
+	struct tracing_data *tdata;
+
+	/*
+	 * We work over the real file, so we can write data
+	 * directly, no temp file is needed.
+	 */
+	tdata = tracing_data_get(pattrs, fd, false);
+	if (!tdata)
+		return -ENOMEM;
+
+	tracing_data_put(tdata);
+	return 0;
+}