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author | Daniel T. Lee <danieltimlee@gmail.com> | 2023-01-15 10:16:13 +0300 |
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committer | Alexei Starovoitov <ast@kernel.org> | 2023-01-16 00:32:45 +0300 |
commit | e04946f54cd99fa1bd92e22f4540720d76d88058 (patch) | |
tree | 059e4cedf8d2015617268672584b31c5db88c6ff /samples/bpf/test_overhead_kprobe.bpf.c | |
parent | e8acf8f47a5d58a00fbfa0f3592bbaaff557cec3 (diff) | |
download | linux-e04946f54cd99fa1bd92e22f4540720d76d88058.tar.xz |
samples/bpf: change _kern suffix to .bpf with BPF test programs
This commit changes the _kern suffix to .bpf with the BPF test programs.
With this modification, test programs will inherit the benefit of the
new CLANG-BPF compile target.
Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com>
Link: https://lore.kernel.org/r/20230115071613.125791-11-danieltimlee@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'samples/bpf/test_overhead_kprobe.bpf.c')
-rw-r--r-- | samples/bpf/test_overhead_kprobe.bpf.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/samples/bpf/test_overhead_kprobe.bpf.c b/samples/bpf/test_overhead_kprobe.bpf.c new file mode 100644 index 000000000000..c3528731e0e1 --- /dev/null +++ b/samples/bpf/test_overhead_kprobe.bpf.c @@ -0,0 +1,47 @@ +/* Copyright (c) 2016 Facebook + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of version 2 of the GNU General Public + * License as published by the Free Software Foundation. + */ +#include "vmlinux.h" +#include <linux/version.h> +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_tracing.h> + +#define _(P) \ + ({ \ + typeof(P) val = 0; \ + bpf_probe_read_kernel(&val, sizeof(val), &(P)); \ + val; \ + }) + +SEC("kprobe/__set_task_comm") +int prog(struct pt_regs *ctx) +{ + struct signal_struct *signal; + struct task_struct *tsk; + char oldcomm[TASK_COMM_LEN] = {}; + char newcomm[TASK_COMM_LEN] = {}; + u16 oom_score_adj; + u32 pid; + + tsk = (void *)PT_REGS_PARM1(ctx); + + pid = _(tsk->pid); + bpf_probe_read_kernel_str(oldcomm, sizeof(oldcomm), &tsk->comm); + bpf_probe_read_kernel_str(newcomm, sizeof(newcomm), + (void *)PT_REGS_PARM2(ctx)); + signal = _(tsk->signal); + oom_score_adj = _(signal->oom_score_adj); + return 0; +} + +SEC("kprobe/fib_table_lookup") +int prog2(struct pt_regs *ctx) +{ + return 0; +} + +char _license[] SEC("license") = "GPL"; +u32 _version SEC("version") = LINUX_VERSION_CODE; |