| 1 | |
| 2 | |
| 3 |
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| 4 | #include <vmlinux.h>
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| 5 | #include <bpf/bpf_helpers.h>
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| 6 | #include <bpf/bpf_tracing.h>
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| 7 |
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| 8 | #ifndef PERF_MAX_STACK_DEPTH
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| 9 | #define PERF_MAX_STACK_DEPTH 127
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| 10 | #endif
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| 11 |
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| 12 | typedef __u64 stack_trace_t[PERF_MAX_STACK_DEPTH];
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| 13 |
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| 14 | struct {
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| 15 | __uint(type, BPF_MAP_TYPE_STACK_TRACE);
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| 16 | __uint(max_entries, 16384);
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| 17 | __type(key, __u32);
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| 18 | __type(value, stack_trace_t);
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| 19 | } stackmap SEC(".maps");
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| 20 |
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| 21 | extern bool CONFIG_UNWINDER_ORC __kconfig __weak;
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| 22 |
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| 23 | |
| 24 | * This function is here to have CONFIG_UNWINDER_ORC
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| 25 | * used and added to object BTF.
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| 26 |
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| 27 | int unused(void)
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| 28 | {
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| 29 | return CONFIG_UNWINDER_ORC ? 0 : 1;
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| 30 | }
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| 31 |
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| 32 | __u32 stack_key;
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| 33 |
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| 34 | SEC("kprobe")
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| 35 | int kprobe_test(struct pt_regs *ctx)
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| 36 | {
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| 37 | stack_key = bpf_get_stackid(ctx, &stackmap, 0);
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| 38 | return 0;
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| 39 | }
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| 40 |
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| 41 | SEC("kprobe.multi")
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| 42 | int kprobe_multi_test(struct pt_regs *ctx)
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| 43 | {
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| 44 | stack_key = bpf_get_stackid(ctx, &stackmap, 0);
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| 45 | return 0;
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| 46 | }
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| 47 |
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| 48 | SEC("raw_tp/bpf_testmod_test_read")
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| 49 | int rawtp_test(void *ctx)
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| 50 | {
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| 51 |
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| 52 | stack_key = bpf_get_stackid(ctx, &stackmap, 0);
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| 53 | return 0;
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| 54 | }
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| 55 |
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| 56 | SEC("fentry/bpf_testmod_stacktrace_test")
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| 57 | int fentry_test(struct pt_regs *ctx)
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| 58 | {
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| 59 | |
| 60 | * Skip 2 bpf_program/trampoline stack entries:
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| 61 | * - bpf_prog_bd1f7a949f55fb03_fentry_test
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| 62 | * - bpf_trampoline_182536277701
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| 63 |
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| 64 | stack_key = bpf_get_stackid(ctx, &stackmap, 2);
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| 65 | return 0;
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| 66 | }
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| 67 |
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| 68 | SEC("fexit/bpf_testmod_stacktrace_test")
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| 69 | int fexit_test(struct pt_regs *ctx)
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| 70 | {
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| 71 |
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| 72 | stack_key = bpf_get_stackid(ctx, &stackmap, 2);
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| 73 | return 0;
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| 74 | }
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| 75 |
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| 76 | char _license[] SEC("license") = "GPL";
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