tools/bpf: add a test for bpf_get_stack with raw tracepoint prog
The test attached a raw_tracepoint program to raw_syscalls/sys_enter. It tested to get stack for user space, kernel space and user space with build_id request. It also tested to get user and kernel stack into the same buffer with back-to-back bpf_get_stack helper calls. If jit is not enabled, the user space application will check to ensure that the kernel function for raw_tracepoint ___bpf_prog_run is part of the stack. If jit is enabled, we did not have a reliable way to verify the kernel stack, so just assume the kernel stack is good when the kernel stack size is greater than 0. Signed-off-by:Yonghong Song <yhs@fb.com> Signed-off-by:
Alexei Starovoitov <ast@kernel.org>
parent
2abe611c
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