aya_ebpf/maps/
stack_trace.rs

1use core::{cell::UnsafeCell, mem};
2
3use crate::{
4    bindings::{bpf_map_def, bpf_map_type::BPF_MAP_TYPE_STACK_TRACE},
5    helpers::bpf_get_stackid,
6    maps::PinningType,
7    EbpfContext,
8};
9
10#[repr(transparent)]
11pub struct StackTrace {
12    def: UnsafeCell<bpf_map_def>,
13}
14
15unsafe impl Sync for StackTrace {}
16
17const PERF_MAX_STACK_DEPTH: u32 = 127;
18
19impl StackTrace {
20    pub const fn with_max_entries(max_entries: u32, flags: u32) -> StackTrace {
21        StackTrace {
22            def: UnsafeCell::new(bpf_map_def {
23                type_: BPF_MAP_TYPE_STACK_TRACE,
24                key_size: mem::size_of::<u32>() as u32,
25                value_size: mem::size_of::<u64>() as u32 * PERF_MAX_STACK_DEPTH,
26                max_entries,
27                map_flags: flags,
28                id: 0,
29                pinning: PinningType::None as u32,
30            }),
31        }
32    }
33
34    pub const fn pinned(max_entries: u32, flags: u32) -> StackTrace {
35        StackTrace {
36            def: UnsafeCell::new(bpf_map_def {
37                type_: BPF_MAP_TYPE_STACK_TRACE,
38                key_size: mem::size_of::<u32>() as u32,
39                value_size: mem::size_of::<u64>() as u32 * PERF_MAX_STACK_DEPTH,
40                max_entries,
41                map_flags: flags,
42                id: 0,
43                pinning: PinningType::ByName as u32,
44            }),
45        }
46    }
47
48    pub unsafe fn get_stackid<C: EbpfContext>(&self, ctx: &C, flags: u64) -> Result<i64, i64> {
49        let ret = bpf_get_stackid(ctx.as_ptr(), self.def.get() as *mut _, flags);
50        if ret < 0 {
51            Err(ret)
52        } else {
53            Ok(ret)
54        }
55    }
56}
aya_ebpf/maps/stack_trace.rs

aya_ebpf/maps/
stack_trace.rs
