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Date: Mon, 24 Oct 2016 15:23:06 -0400
From: Philippe Proulx <eeppeliteloop@...il.com>
To: linux-kernel@...r.kernel.org
Cc: Wang Nan <wangnan0@...wei.com>,
Jérémie Galarneau
<jeremie.galarneau@...il.com>,
"David S . Miller" <davem@...emloft.net>,
Alexei Starovoitov <ast@...nel.org>,
Brendan Gregg <brendan.d.gregg@...il.com>,
Jiri Olsa <jolsa@...nel.org>,
Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
Namhyung Kim <namhyung@...nel.org>,
Zefan Li <lizefan@...wei.com>, pi3orama@....com
Subject: [PATCH] perf data convert: fix possible leak
This patch removes the need to manually update the static size of
data.array in struct ctf_writer.
Signed-off-by: Philippe Proulx <eeppeliteloop@...il.com>
---
tools/perf/util/data-convert-bt.c | 65 ++++++++++++++++++++-------------------
1 file changed, 33 insertions(+), 32 deletions(-)
diff --git a/tools/perf/util/data-convert-bt.c b/tools/perf/util/data-convert-bt.c
index 7123f4d..6c04ad6 100644
--- a/tools/perf/util/data-convert-bt.c
+++ b/tools/perf/util/data-convert-bt.c
@@ -58,7 +58,7 @@ struct ctf_writer {
/* data types */
union {
- struct {
+ struct field_types {
struct bt_ctf_field_type *s64;
struct bt_ctf_field_type *u64;
struct bt_ctf_field_type *s32;
@@ -66,8 +66,9 @@ struct ctf_writer {
struct bt_ctf_field_type *string;
struct bt_ctf_field_type *u32_hex;
struct bt_ctf_field_type *u64_hex;
- };
- struct bt_ctf_field_type *array[6];
+ } fts;
+ struct bt_ctf_field_type *array[sizeof(struct field_types) /
+ sizeof(struct bt_ctf_field_type *)];
} data;
struct bt_ctf_event_class *comm_class;
struct bt_ctf_event_class *exit_class;
@@ -133,7 +134,7 @@ static __maybe_unused int value_set_##_name(struct ctf_writer *cw, \
const char *name, \
_val_type val) \
{ \
- struct bt_ctf_field_type *type = cw->data._name; \
+ struct bt_ctf_field_type *type = cw->data.fts._name; \
return value_set(type, event, name, (u64) val); \
}
@@ -150,7 +151,7 @@ static __maybe_unused int
value_set_string(struct ctf_writer *cw, struct bt_ctf_event *event,
const char *name, const char *string)
{
- struct bt_ctf_field_type *type = cw->data.string;
+ struct bt_ctf_field_type *type = cw->data.fts.string;
struct bt_ctf_field *field;
int ret = 0;
@@ -181,25 +182,25 @@ get_tracepoint_field_type(struct ctf_writer *cw, struct format_field *field)
unsigned long flags = field->flags;
if (flags & FIELD_IS_STRING)
- return cw->data.string;
+ return cw->data.fts.string;
if (!(flags & FIELD_IS_SIGNED)) {
/* unsigned long are mostly pointers */
if (flags & FIELD_IS_LONG || flags & FIELD_IS_POINTER)
- return cw->data.u64_hex;
+ return cw->data.fts.u64_hex;
}
if (flags & FIELD_IS_SIGNED) {
if (field->size == 8)
- return cw->data.s64;
+ return cw->data.fts.s64;
else
- return cw->data.s32;
+ return cw->data.fts.s32;
}
if (field->size == 8)
- return cw->data.u64;
+ return cw->data.fts.u64;
else
- return cw->data.u32;
+ return cw->data.fts.u32;
}
static unsigned long long adjust_signedness(unsigned long long value_int, int size)
@@ -969,8 +970,8 @@ static int add_tracepoint_types(struct ctf_writer *cw,
static int add_bpf_output_types(struct ctf_writer *cw,
struct bt_ctf_event_class *class)
{
- struct bt_ctf_field_type *len_type = cw->data.u32;
- struct bt_ctf_field_type *seq_base_type = cw->data.u32_hex;
+ struct bt_ctf_field_type *len_type = cw->data.fts.u32;
+ struct bt_ctf_field_type *seq_base_type = cw->data.fts.u32_hex;
struct bt_ctf_field_type *seq_type;
int ret;
@@ -1013,31 +1014,31 @@ static int add_generic_types(struct ctf_writer *cw, struct perf_evsel *evsel,
} while (0)
if (type & PERF_SAMPLE_IP)
- ADD_FIELD(event_class, cw->data.u64_hex, "perf_ip");
+ ADD_FIELD(event_class, cw->data.fts.u64_hex, "perf_ip");
if (type & PERF_SAMPLE_TID) {
- ADD_FIELD(event_class, cw->data.s32, "perf_tid");
- ADD_FIELD(event_class, cw->data.s32, "perf_pid");
+ ADD_FIELD(event_class, cw->data.fts.s32, "perf_tid");
+ ADD_FIELD(event_class, cw->data.fts.s32, "perf_pid");
}
if ((type & PERF_SAMPLE_ID) ||
(type & PERF_SAMPLE_IDENTIFIER))
- ADD_FIELD(event_class, cw->data.u64, "perf_id");
+ ADD_FIELD(event_class, cw->data.fts.u64, "perf_id");
if (type & PERF_SAMPLE_STREAM_ID)
- ADD_FIELD(event_class, cw->data.u64, "perf_stream_id");
+ ADD_FIELD(event_class, cw->data.fts.u64, "perf_stream_id");
if (type & PERF_SAMPLE_PERIOD)
- ADD_FIELD(event_class, cw->data.u64, "perf_period");
+ ADD_FIELD(event_class, cw->data.fts.u64, "perf_period");
if (type & PERF_SAMPLE_WEIGHT)
- ADD_FIELD(event_class, cw->data.u64, "perf_weight");
+ ADD_FIELD(event_class, cw->data.fts.u64, "perf_weight");
if (type & PERF_SAMPLE_DATA_SRC)
- ADD_FIELD(event_class, cw->data.u64, "perf_data_src");
+ ADD_FIELD(event_class, cw->data.fts.u64, "perf_data_src");
if (type & PERF_SAMPLE_TRANSACTION)
- ADD_FIELD(event_class, cw->data.u64, "perf_transaction");
+ ADD_FIELD(event_class, cw->data.fts.u64, "perf_transaction");
#undef ADD_FIELD
return 0;
@@ -1109,7 +1110,7 @@ static int setup_events(struct ctf_writer *cw, struct perf_session *session)
#define __NON_SAMPLE_ADD_FIELD(t, n) \
do { \
pr2(" field '%s'\n", #n); \
- if (bt_ctf_event_class_add_field(event_class, cw->data.t, #n)) {\
+ if (bt_ctf_event_class_add_field(event_class, cw->data.fts.t, #n)) {\
pr_err("Failed to add field '%s';\n", #n);\
return -1; \
} \
@@ -1324,15 +1325,15 @@ do { \
goto err; \
} while (0)
- CREATE_INT_TYPE(cw->data.s64, 64, true, false);
- CREATE_INT_TYPE(cw->data.u64, 64, false, false);
- CREATE_INT_TYPE(cw->data.s32, 32, true, false);
- CREATE_INT_TYPE(cw->data.u32, 32, false, false);
- CREATE_INT_TYPE(cw->data.u32_hex, 32, false, true);
- CREATE_INT_TYPE(cw->data.u64_hex, 64, false, true);
+ CREATE_INT_TYPE(cw->data.fts.s64, 64, true, false);
+ CREATE_INT_TYPE(cw->data.fts.u64, 64, false, false);
+ CREATE_INT_TYPE(cw->data.fts.s32, 32, true, false);
+ CREATE_INT_TYPE(cw->data.fts.u32, 32, false, false);
+ CREATE_INT_TYPE(cw->data.fts.u32_hex, 32, false, true);
+ CREATE_INT_TYPE(cw->data.fts.u64_hex, 64, false, true);
- cw->data.string = bt_ctf_field_type_string_create();
- if (cw->data.string)
+ cw->data.fts.string = bt_ctf_field_type_string_create();
+ if (cw->data.fts.string)
return 0;
err:
@@ -1406,7 +1407,7 @@ static int ctf_writer__init(struct ctf_writer *cw, const char *path)
if (!pkt_ctx_type)
goto err_cleanup;
- ret = bt_ctf_field_type_structure_add_field(pkt_ctx_type, cw->data.u32, "cpu_id");
+ ret = bt_ctf_field_type_structure_add_field(pkt_ctx_type, cw->data.fts.u32, "cpu_id");
bt_ctf_field_type_put(pkt_ctx_type);
if (ret)
goto err_cleanup;
--
2.9.3
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