perf tools: Misc small fixes

- util/header.c
	"len" is aligned to 64. So, it tries to write the out of
	long_name buffer.

	So, this use "zero_buf" to write aligned area.

- util/trace-event-read.c
	"size" is not including nul byte. So, this allocates it, and set '\0'.

- util/trace-event-parse.c
	It needs parens to calc correct size.

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <87d42s8iiu.fsf_-_@devron.myhome.or.jp>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 4805e6d..08b6759 100644 (file)
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -187,7 +187,9 @@ static int do_write(int fd, const void *buf, size_t size)
 
 static int __dsos__write_buildid_table(struct list_head *head, int fd)
 {
+#define NAME_ALIGN     64
        struct dso *pos;
+       static const char zero_buf[NAME_ALIGN];
 
        list_for_each_entry(pos, head, node) {
                int err;
@@ -197,14 +199,17 @@ static int __dsos__write_buildid_table(struct list_head *head, int fd)
                if (!pos->has_build_id)
                        continue;
                len = pos->long_name_len + 1;
-               len = ALIGN(len, 64);
+               len = ALIGN(len, NAME_ALIGN);
                memset(&b, 0, sizeof(b));
                memcpy(&b.build_id, pos->build_id, sizeof(pos->build_id));
                b.header.size = sizeof(b) + len;
                err = do_write(fd, &b, sizeof(b));
                if (err < 0)
                        return err;
-               err = do_write(fd, pos->long_name, len);
+               err = do_write(fd, pos->long_name, pos->long_name_len + 1);
+               if (err < 0)
+                       return err;
+               err = do_write(fd, zero_buf, len - pos->long_name_len + 1);
                if (err < 0)
                        return err;
        }

diff --git a/tools/perf/util/trace-event-parse.c b/tools/perf/util/trace-event-parse.c
index 0302405..6ffe9d6 100644 (file)
--- a/tools/perf/util/trace-event-parse.c
+++ b/tools/perf/util/trace-event-parse.c
@@ -177,7 +177,7 @@ void parse_proc_kallsyms(char *file, unsigned int size __unused)
                func_count++;
        }
 
-       func_list = malloc_or_die(sizeof(*func_list) * func_count + 1);
+       func_list = malloc_or_die(sizeof(*func_list) * (func_count + 1));
 
        i = 0;
        while (list) {

diff --git a/tools/perf/util/trace-event-read.c b/tools/perf/util/trace-event-read.c
index 342dfdd..1744422 100644 (file)
--- a/tools/perf/util/trace-event-read.c
+++ b/tools/perf/util/trace-event-read.c
@@ -145,8 +145,9 @@ static void read_proc_kallsyms(void)
        if (!size)
                return;
 
-       buf = malloc_or_die(size);
+       buf = malloc_or_die(size + 1);
        read_or_die(buf, size);
+       buf[size] = '\0';
 
        parse_proc_kallsyms(buf, size);