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    tools/bpf: add a test for bpf_get_stack with raw tracepoint prog · 173965fb
    Yonghong Song 提交于
    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: NYonghong Song <yhs@fb.com>
    Signed-off-by: NAlexei Starovoitov <ast@kernel.org>
    173965fb
Makefile 3.2 KB