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Message-ID: <20190122210218.358664-1-songliubraving@fb.com>
Date: Tue, 22 Jan 2019 13:02:18 -0800
From: Song Liu <songliubraving@...com>
To: <linux-kernel@...r.kernel.org>
CC: Song Liu <songliubraving@...com>, <peterz@...radead.org>,
<acme@...nel.org>, <ast@...nel.org>, <daniel@...earbox.net>,
<kernel-team@...com>, Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH perf] perf tools: fix synthesized PERF_RECORD_KSYMBOL/BPF_EVENT
Added missing machine->id_hdr_size to event->header.size. Also fixed size
of PERF_RECORD_KSYMBOL by removing extra bytes for name.
Fixes: 7b612e291a5a ("perf tools: Synthesize PERF_RECORD_* for loaded BPF programs")
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Suggested-by: Jiri Olsa <jolsa@...nel.org>
Signed-off-by: Song Liu <songliubraving@...com>
---
tools/perf/util/bpf-event.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/tools/perf/util/bpf-event.c b/tools/perf/util/bpf-event.c
index 01e1dc1bb7fb..f610872812ef 100644
--- a/tools/perf/util/bpf-event.c
+++ b/tools/perf/util/bpf-event.c
@@ -7,6 +7,7 @@
#include "bpf-event.h"
#include "debug.h"
#include "symbol.h"
+#include "machine.h"
#define ptr_to_u64(ptr) ((__u64)(unsigned long)(ptr))
@@ -149,7 +150,7 @@ static int perf_event__synthesize_one_bpf_prog(struct perf_tool *tool,
*ksymbol_event = (struct ksymbol_event){
.header = {
.type = PERF_RECORD_KSYMBOL,
- .size = sizeof(struct ksymbol_event),
+ .size = offsetof(struct ksymbol_event, name),
},
.addr = prog_addrs[i],
.len = prog_lens[i],
@@ -178,6 +179,9 @@ static int perf_event__synthesize_one_bpf_prog(struct perf_tool *tool,
ksymbol_event->header.size += PERF_ALIGN(name_len + 1,
sizeof(u64));
+
+ memset(event + event->header.size, 0, machine->id_hdr_size);
+ event->header.size += machine->id_hdr_size;
err = perf_tool__process_synth_event(tool, event,
machine, process);
}
@@ -194,6 +198,8 @@ static int perf_event__synthesize_one_bpf_prog(struct perf_tool *tool,
.id = info.id,
};
memcpy(bpf_event->tag, prog_tags[i], BPF_TAG_SIZE);
+ memset(event + event->header.size, 0, machine->id_hdr_size);
+ event->header.size += machine->id_hdr_size;
err = perf_tool__process_synth_event(tool, event,
machine, process);
}
--
2.17.1
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