在 2016/6/8 18:15, He Kuang 写道:
The remote unwind can supported scenario where we collect on a x86_64 machine and want to do analysis on a ARM64 or x86-32 machine. Though this is not tested, after Arnaldo questioned the above issue, I tested and found a bug. In util/unwind-libunwind-local.c, PERF_REG_SP/IP is used, but those macros are assigned to the host platform, we should redefine them in the wrapper file, for example in "util/libunwind/x86_32.c". After fixing this problem, i686 perf.data can be parsed on aarch64 machine. To Arnaldo, I noticed that this patch "perf tools: Find vdso supporting cross-platform analysis" is not on "origin/perf/unwind" branch, this patch was applied, please check if it was missed, the above test needs this patch.
Thanks for solving this, and please have a look at the patches in this thread.
He Kuang (3): perf unwind: Change macro names of perf register perf unwind: Fix wrongly used regs for x86_32 unwind perf unwind: Fix wrongly used regs for aarch64 unwind tools/perf/util/libunwind/arm64.c | 5 +++++ tools/perf/util/libunwind/x86_32.c | 6 ++++++ tools/perf/util/unwind-libunwind-local.c | 6 ++++-- tools/perf/util/unwind.h | 9 +++++++++ 4 files changed, 24 insertions(+), 2 deletions(-)
