The first patch fixes the callchain ip filtering mechanism for powerpc from skipping entries in case the LR value is still valid and yet to be written to the stack frame. This was previously posted as an RFC here: https://lkml.org/lkml/2018/4/4/633
The second patch fixes a crash caused by attempting to access an empty callchain. The third patch fixes a shell test which used to fail on powerpc as the back trace from perf output did not match the expected pattern. Also, because of the issue described in the first patch, some entries from the callchain were incorrectly skipped. So, this has also been readjusted to work with the fix in the first patch. v2: - Consider case when return address is in R0 as pointed out by Ravi. - Add another patch to fix crash when callchain is empty. Sandipan Das (3): perf tools powerpc: Fix callchain ip filtering perf tools powerpc: Fix crash if callchain is empty perf tests: Fix record+probe_libc_inet_pton.sh for powerpc64 tools/perf/arch/powerpc/util/skip-callchain-idx.c | 74 +++++++++++++--------- .../tests/shell/record+probe_libc_inet_pton.sh | 8 +++ 2 files changed, 53 insertions(+), 29 deletions(-) -- 2.14.3
