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| author | Qi Zheng <zhengqi.arch@bytedance.com> | 2021-09-30 00:02:17 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2021-10-15 11:25:14 +0200 |
| commit | bc9bbb81730ea667c31c5b284f95ee312bab466f (patch) | |
| tree | f9f4a5d7a04d22d2b7bb4d0fa4d9d0301b436497 /arch/nios2 | |
| parent | proc: Use task_is_running() for wchan in /proc/$pid/stat (diff) | |
| download | linux-bc9bbb81730ea667c31c5b284f95ee312bab466f.tar.xz linux-bc9bbb81730ea667c31c5b284f95ee312bab466f.zip | |
x86: Fix get_wchan() to support the ORC unwinder
Currently, the kernel CONFIG_UNWINDER_ORC option is enabled by default
on x86, but the implementation of get_wchan() is still based on the frame
pointer unwinder, so the /proc/<pid>/wchan usually returned 0 regardless
of whether the task <pid> is running.
Reimplement get_wchan() by calling stack_trace_save_tsk(), which is
adapted to the ORC and frame pointer unwinders.
Fixes: ee9f8fce9964 ("x86/unwind: Add the ORC unwinder")
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20211008111626.271115116@infradead.org
Diffstat (limited to 'arch/nios2')
0 files changed, 0 insertions, 0 deletions