[PATCH v1 0/2] perf arm64: Support SDT
From: Leo Yan
Date: Wed Dec 23 2020 - 01:41:08 EST
This patch is to enable SDT on Arm64.
Since Arm64 SDT marker in ELF file is different from other archs,
especially for using stack pointer (sp) to retrieve data for local
variables, patch 01 is used to fixup the arguments for this special
case. Patch 02 is to add argument support for Arm64 SDT.
This patch set has been verified on Arm64/x86_64 platforms with a
testing program usdt_test [1]. The program run the SDT interfaces
one by one for DTRACE_PROBE, DTRACE_PROBE1, ..., DTRACE_PROBE12, so
it tries to verify probe with different count of arguments (the
arguments count is 0 to 12).
The testing flow and result are shown as below:
# perf buildid-cache --add /root/test/usdt_test
# perf probe sdt_usdt:test_probe
# perf probe sdt_usdt:test_probe_param1
# perf probe sdt_usdt:test_probe_param1x
# perf probe sdt_usdt:test_probe_param2
# perf probe sdt_usdt:test_probe_param2x
# perf probe sdt_usdt:test_probe_param3
# perf probe sdt_usdt:test_probe_param3x
# perf probe sdt_usdt:test_probe_param4
# perf probe sdt_usdt:test_probe_param4x
# perf probe sdt_usdt:test_probe_param5
# perf probe sdt_usdt:test_probe_param5x
# perf probe sdt_usdt:test_probe_param6
# perf probe sdt_usdt:test_probe_param6x
# perf probe sdt_usdt:test_probe_param7
# perf probe sdt_usdt:test_probe_param7x
# perf probe sdt_usdt:test_probe_param8
# perf probe sdt_usdt:test_probe_param8x
# perf probe sdt_usdt:test_probe_param9
# perf probe sdt_usdt:test_probe_param9x
# perf probe sdt_usdt:test_probe_param10
# perf probe sdt_usdt:test_probe_param10x
# perf probe sdt_usdt:test_probe_param11
# perf probe sdt_usdt:test_probe_param11x
# perf probe sdt_usdt:test_probe_param12
# perf probe sdt_usdt:test_probe_param12x
# perf record \
-e sdt_usdt:test_probe_param1 -e sdt_usdt:test_probe_param1x \
-e sdt_usdt:test_probe_param2 -e sdt_usdt:test_probe_param2x \
-e sdt_usdt:test_probe_param3 -e sdt_usdt:test_probe_param3x \
-e sdt_usdt:test_probe_param4 -e sdt_usdt:test_probe_param4x \
-e sdt_usdt:test_probe_param5 -e sdt_usdt:test_probe_param5x \
-e sdt_usdt:test_probe_param6 -e sdt_usdt:test_probe_param6x \
-e sdt_usdt:test_probe_param7 -e sdt_usdt:test_probe_param7x \
-e sdt_usdt:test_probe_param8 -e sdt_usdt:test_probe_param8x \
-e sdt_usdt:test_probe_param9 -e sdt_usdt:test_probe_param9x \
-e sdt_usdt:test_probe_param10 -e sdt_usdt:test_probe_param10x \
-e sdt_usdt:test_probe_param11 -e sdt_usdt:test_probe_param11x \
-e sdt_usdt:test_probe_param12 -e sdt_usdt:test_probe_param12x \
-e sdt_usdt:test_probe -aR sleep 5
# ./usdt_test => Execute in another terminal
# perf script
usdt_test 7999 [003] 80493.418276: sdt_usdt:test_probe: (aaaab0d80714)
usdt_test 7999 [003] 80493.418352: sdt_usdt:test_probe_param1: (aaaab0d80728) arg1=1
usdt_test 7999 [003] 80493.418379: sdt_usdt:test_probe_param2: (aaaab0d80744) arg1=1 arg2=2
usdt_test 7999 [003] 80493.418405: sdt_usdt:test_probe_param3: (aaaab0d80764) arg1=1 arg2=2 arg3=3
usdt_test 7999 [003] 80493.418432: sdt_usdt:test_probe_param4: (aaaab0d80788) arg1=1 arg2=2 arg3=3 arg4=4
usdt_test 7999 [003] 80493.418459: sdt_usdt:test_probe_param5: (aaaab0d807b0) arg1=1 arg2=2 arg3=3 arg4=4 arg5=5
usdt_test 7999 [003] 80493.418487: sdt_usdt:test_probe_param6: (aaaab0d807dc) arg1=1 arg2=2 arg3=3 arg4=4 arg5=5 arg6=6
usdt_test 7999 [003] 80493.418516: sdt_usdt:test_probe_param7: (aaaab0d8080c) arg1=1 arg2=2 arg3=3 arg4=4 arg5=5 arg6=6 arg7=7
usdt_test 7999 [003] 80493.418545: sdt_usdt:test_probe_param8: (aaaab0d80840) arg1=1 arg2=2 arg3=3 arg4=4 arg5=5 arg6=6 arg7=7 arg8=8
usdt_test 7999 [003] 80493.418574: sdt_usdt:test_probe_param9: (aaaab0d80874) arg1=1 arg2=2 arg3=3 arg4=4 arg5=5 arg6=6 arg7=7 arg8=8 arg9=9
usdt_test 7999 [003] 80493.418603: sdt_usdt:test_probe_param10: (aaaab0d808a8) arg1=1 arg2=2 arg3=3 arg4=4 arg5=5 arg6=6 arg7=7 arg8=8 arg9=9 arg10=10
usdt_test 7999 [003] 80493.418632: sdt_usdt:test_probe_param11: (aaaab0d808dc) arg1=1 arg2=2 arg3=3 arg4=4 arg5=5 arg6=6 arg7=7 arg8=8 arg9=9 arg10=10 arg11=11
usdt_test 7999 [003] 80493.418662: sdt_usdt:test_probe_param12: (aaaab0d80910) arg1=1 arg2=2 arg3=3 arg4=4 arg5=5 arg6=6 arg7=7 arg8=8 arg9=9 arg10=10 arg11=11 arg12=12
usdt_test 7999 [003] 80493.418687: sdt_usdt:test_probe_param1x: (aaaab0d8092c) arg1=1
usdt_test 7999 [003] 80493.418713: sdt_usdt:test_probe_param2x: (aaaab0d80950) arg1=1 arg2=2
usdt_test 7999 [003] 80493.418739: sdt_usdt:test_probe_param3x: (aaaab0d8097c) arg1=1 arg2=2 arg3=3
usdt_test 7999 [003] 80493.418766: sdt_usdt:test_probe_param4x: (aaaab0d809b0) arg1=1 arg2=2 arg3=3 arg4=4
usdt_test 7999 [003] 80493.418792: sdt_usdt:test_probe_param5x: (aaaab0d809ec) arg1=1 arg2=2 arg3=3 arg4=4 arg5=5
usdt_test 7999 [003] 80493.418820: sdt_usdt:test_probe_param6x: (aaaab0d80a30) arg1=1 arg2=2 arg3=3 arg4=4 arg5=5 arg6=6
usdt_test 7999 [003] 80493.418847: sdt_usdt:test_probe_param7x: (aaaab0d80a7c) arg1=1 arg2=2 arg3=3 arg4=4 arg5=5 arg6=6 arg7=7
usdt_test 7999 [003] 80493.418875: sdt_usdt:test_probe_param8x: (aaaab0d80ad0) arg1=1 arg2=2 arg3=3 arg4=4 arg5=5 arg6=6 arg7=7 arg8=8
usdt_test 7999 [003] 80493.418904: sdt_usdt:test_probe_param9x: (aaaab0d80b2c) arg1=1 arg2=2 arg3=3 arg4=4 arg5=5 arg6=6 arg7=7 arg8=8 arg9=9
usdt_test 7999 [003] 80493.418933: sdt_usdt:test_probe_param10x: (aaaab0d80b90) arg1=1 arg2=2 arg3=3 arg4=4 arg5=5 arg6=6 arg7=7 arg8=8 arg9=9 arg10=10
usdt_test 7999 [003] 80493.418962: sdt_usdt:test_probe_param11x: (aaaab0d80bfc) arg1=1 arg2=2 arg3=3 arg4=4 arg5=5 arg6=6 arg7=7 arg8=8 arg9=9 arg10=10 arg11=11
usdt_test 7999 [003] 80493.418991: sdt_usdt:test_probe_param12x: (aaaab0d80cb0) arg1=1 arg2=2 arg3=3 arg4=4 arg5=5 arg6=6 arg7=7 arg8=8 arg9=281474762776336 arg10=281474762776340 arg11=281474762776344 arg12=281474762776348
[1] https://people.linaro.org/~leo.yan/debug/perf/usdt_test.c
Leo Yan (2):
perf probe: Fixup Arm64 SDT arguments
perf arm64: Add argument support for SDT
tools/perf/arch/arm64/util/perf_regs.c | 94 ++++++++++++++++++++++++++
tools/perf/util/probe-file.c | 32 ++++++++-
2 files changed, 124 insertions(+), 2 deletions(-)
--
2.17.1