Revision 302fa4b58ac754a6da13f4f5546f710fecc3b945 authored by Arun Sharma on 20 April 2012, 22:41:33 UTC, committed by Ingo Molnar on 06 June 2012, 15:07:58 UTC
Without this patch, applications with two different stack regions (eg: native stack vs JIT stack) get truncated callchains even when RBP chaining is present. GDB shows proper stack traces and the frame pointer chaining is intact. This patch disables the (fp < RSP) check, hoping that other checks in the code save the day for us. In our limited testing, this didn't seem to break anything. In the long term, we could potentially have userspace advise the kernel on the range of valid stack addresses, so we don't spend a lot of time unwinding from bogus addresses. Signed-off-by: Arun Sharma <asharma@fb.com> CC: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Stephane Eranian <eranian@google.com> Cc: Namhyung Kim <namhyung.kim@lge.com> Cc: Tom Zanussi <tzanussi@gmail.com> Cc: linux-kernel@vger.kernel.org Cc: linux-perf-users@vger.kernel.org Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/r/1334961696-19580-2-git-send-email-asharma@fb.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
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.gitignore | -rw-r--r-- | 151 bytes |
Kconfig | -rw-r--r-- | 5.3 KB |
Makefile | -rw-r--r-- | 2.3 KB |
gen_init_cpio.c | -rw-r--r-- | 13.1 KB |
initramfs_data.S | -rw-r--r-- | 1.3 KB |
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