perf tools: Minimal CALLCHAIN_DEFERRED support
Add a new event type for deferred callchains and a new callback for the
struct perf_tool. For now it doesn't actually handle the deferred
callchains but it just marks the sample if it has the PERF_CONTEXT_
USER_DEFFERED in the callchain array.
At least, perf report can dump the raw data with this change. Actually
this requires the next commit to enable attr.defer_callchain, but if you
already have a data file, it'll show the following result.
$ perf report -D
...
0x5fe0@perf.data [0x40]: event: 22
.
. ... raw event: size 64 bytes
. 0000: 16 00 00 00 02 00 40 00 02 00 00 00 00 00 00 00 ......@.........
. 0010: 00 fe ff ff ff ff ff ff 4b d3 3f 25 45 7f 00 00 ........K.?%E...
. 0020: 21 03 00 00 21 03 00 00 43 02 12 ab 05 00 00 00 !...!...C.......
. 0030: 00 00 00 00 00 00 00 00 09 00 00 00 00 00 00 00 ................
0 24344920643 0x5fe0 [0x40]: PERF_RECORD_CALLCHAIN_DEFERRED(IP, 0x2): 801/801: 0
... FP chain: nr:2
..... 0: fffffffffffffe00
..... 1: 00007f45253fd34b
: unhandled!
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
9 files changed
