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perf powerpc-vpadtl: Fix raw_size of DTL samples

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In powerpc_vpadtl_sample(), raw_data of the synthetic sample points to a
struct powerpc_vpadtl_entry (48 bytes), but raw_size is set to
sizeof(record).  record is a struct powerpc_vpadtl_entry pointer, so
sizeof(record) is the size of the pointer (8 bytes on 64-bit) rather
than the size of the record itself.

As a result, consumers that bound their access to raw_data by raw_size
only see or copy the first 8 bytes of each DTL entry instead of the full
record.

Use sizeof(*record) so that raw_size reflects the actual length of the
raw data.

Fixes: 8644834a48 ("perf powerpc: Process the DTL entries in queue and deliver samples")
Signed-off-by: Wang Yan <wangyan01@kylinos.cn>
Reviewed-by: Athira Rajeev <atrajeev@linux.ibm.com>
Reviewed-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
This commit is contained in:
Wang Yan 2026-08-25 17:47:33 +08:00 committed by Namhyung Kim
parent ae9464c65e
commit aadea57f53
1 changed files with 1 additions and 1 deletions
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2
tools/perf/util/powerpc-vpadtl.c
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@ -196,7 +196,7 @@ static int powerpc_vpadtl_sample(struct powerpc_vpadtl_entry *record,
sample.cpumode = PERF_RECORD_MISC_KERNEL;
sample.time = save;
sample.raw_data = record;
sample.raw_size = sizeof(record);
sample.raw_size = sizeof(*record);
event.sample.header.type = PERF_RECORD_SAMPLE;
event.sample.header.misc = sample.cpumode;
event.sample.header.size = sizeof(struct perf_event_header);