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perf: pad raw data samples automatically

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Instead of WARN_ON in perf_event_output() on unpaded raw samples,
pad them automatically.

Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexei Starovoitov 2015-10-20 20:02:33 -07:00 committed by David S. Miller
parent 63b11e757d
commit fa128e6a14
1 changed files with 10 additions and 5 deletions
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15
kernel/events/core.c
View file

@ -5286,9 +5286,15 @@ void perf_output_sample(struct perf_output_handle *handle,
if (sample_type & PERF_SAMPLE_RAW) {
if (data->raw) {
perf_output_put(handle, data->raw->size);
__output_copy(handle, data->raw->data,
data->raw->size);
u32 raw_size = data->raw->size;
u32 real_size = round_up(raw_size + sizeof(u32),
sizeof(u64)) - sizeof(u32);
u64 zero = 0;
perf_output_put(handle, real_size);
__output_copy(handle, data->raw->data, raw_size);
if (real_size - raw_size)
__output_copy(handle, &zero, real_size - raw_size);
} else {
struct {
u32 size;
@ -5420,8 +5426,7 @@ void perf_prepare_sample(struct perf_event_header *header,
else
size += sizeof(u32);
WARN_ON_ONCE(size & (sizeof(u64)-1));
header->size += size;
header->size += round_up(size, sizeof(u64));
}
if (sample_type & PERF_SAMPLE_BRANCH_STACK) {