perf_event: push down type safety

This makes it more difficult to mishandle callers of `perf_event_open`.

Change `wakeup_events = 0` to 1; per `man 2 perf_event_open`:

  Prior to Linux 3.0, setting wakeup_events to 0 resulted in
  no overflow notifications; more recent kernels treat 0 the
  same as 1.

aya/src/programs/mod.rs

@@ -111,7 +111,7 @@ pub use crate::programs::{
     lirc_mode2::LircMode2,
     lsm::Lsm,
     lsm_cgroup::LsmCgroup,
-    perf_event::{PerfEvent, PerfEventScope, SamplePolicy},
+    perf_event::PerfEvent,
     probe::ProbeKind,
     raw_trace_point::RawTracePoint,
     sk_lookup::SkLookup,

aya/src/programs/perf_event.rs

@@ -3,14 +3,8 @@
 use std::os::fd::AsFd as _;
 
 use aya_obj::generated::{
-    bpf_link_type,
-    bpf_prog_type::BPF_PROG_TYPE_PERF_EVENT,
-    perf_hw_cache_id, perf_hw_cache_op_id, perf_hw_cache_op_result_id, perf_hw_id, perf_sw_ids,
-    perf_type_id,
-    perf_type_id::{
-        PERF_TYPE_BREAKPOINT, PERF_TYPE_HARDWARE, PERF_TYPE_HW_CACHE, PERF_TYPE_RAW,
-        PERF_TYPE_SOFTWARE, PERF_TYPE_TRACEPOINT,
-    },
+    bpf_link_type, bpf_prog_type::BPF_PROG_TYPE_PERF_EVENT, perf_hw_cache_id, perf_hw_cache_op_id,
+    perf_hw_cache_op_result_id, perf_hw_id, perf_sw_ids, perf_type_id,
 };
 
 use crate::{
@@ -84,7 +78,7 @@ pub enum PerfEventConfig {
 
 macro_rules! impl_to_u32 {
     ($($t:ty, $fn:ident),*) => {
-        $(const fn $fn(id: $t) -> u32 {
+        $(pub(crate) const fn $fn(id: $t) -> u32 {
             const _: [(); 4] = [(); std::mem::size_of::<$t>()];
             id as u32
         })*
@@ -144,7 +138,7 @@ pub enum HardwareEvent {
 }
 
 impl HardwareEvent {
-    const fn into_primitive(self) -> u32 {
+    pub(crate) const fn into_primitive(self) -> u32 {
         const _: [(); 4] = [(); std::mem::size_of::<HardwareEvent>()];
         self as u32
     }
@@ -194,7 +188,7 @@ pub enum SoftwareEvent {
 }
 
 impl SoftwareEvent {
-    const fn into_primitive(self) -> u32 {
+    pub(crate) const fn into_primitive(self) -> u32 {
         const _: [(); 4] = [(); std::mem::size_of::<SoftwareEvent>()];
         self as u32
     }
@@ -229,7 +223,7 @@ pub enum HwCacheEvent {
 }
 
 impl HwCacheEvent {
-    const fn into_primitive(self) -> u32 {
+    pub(crate) const fn into_primitive(self) -> u32 {
         const _: [(); 4] = [(); std::mem::size_of::<HwCacheEvent>()];
         self as u32
     }
@@ -252,7 +246,7 @@ pub enum HwCacheOp {
 }
 
 impl HwCacheOp {
-    const fn into_primitive(self) -> u32 {
+    pub(crate) const fn into_primitive(self) -> u32 {
         const _: [(); 4] = [(); std::mem::size_of::<HwCacheOp>()];
         self as u32
     }
@@ -276,14 +270,14 @@ pub enum HwCacheResult {
 }
 
 impl HwCacheResult {
-    const fn into_primitive(self) -> u32 {
+    pub(crate) const fn into_primitive(self) -> u32 {
         const _: [(); 4] = [(); std::mem::size_of::<HwCacheResult>()];
         self as u32
     }
 }
 
 /// Sample Policy
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Copy)]
 pub enum SamplePolicy {
     /// Period
     Period(u64),
@@ -291,8 +285,18 @@ pub enum SamplePolicy {
     Frequency(u64),
 }
 
+/// Wakeup Policy
+#[derive(Debug, Clone, Copy)]
+pub(crate) enum WakeupPolicy {
+    /// Every N events
+    Events(u32),
+    /// Every N bytes
+    #[expect(dead_code)]
+    Watermark(u32),
+}
+
 /// The scope of a PerfEvent
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, Copy)]
 pub enum PerfEventScope {
     /// calling process
     CallingProcess {
@@ -381,7 +385,7 @@ impl PerfEvent {
     /// The returned value can be used to detach, see [PerfEvent::detach].
     pub fn attach(
         &mut self,
-        perf_type: PerfEventConfig,
+        config: PerfEventConfig,
         scope: PerfEventScope,
         sample_policy: SamplePolicy,
         inherit: bool,
@@ -389,49 +393,11 @@ impl PerfEvent {
         let prog_fd = self.fd()?;
         let prog_fd = prog_fd.as_fd();
 
-        let (perf_type, config) = match perf_type {
-            PerfEventConfig::Pmu { pmu_type, config } => (pmu_type, config),
-            PerfEventConfig::Hardware(hw_event) => (
-                perf_type_id_to_u32(PERF_TYPE_HARDWARE),
-                u64::from(hw_event.into_primitive()),
-            ),
-            PerfEventConfig::Software(sw_event) => (
-                perf_type_id_to_u32(PERF_TYPE_SOFTWARE),
-                u64::from(sw_event.into_primitive()),
-            ),
-            PerfEventConfig::TracePoint { event_id } => {
-                (perf_type_id_to_u32(PERF_TYPE_TRACEPOINT), event_id)
-            }
-            PerfEventConfig::HwCache {
-                event,
-                operation,
-                result,
-            } => (
-                perf_type_id_to_u32(PERF_TYPE_HW_CACHE),
-                u64::from(event.into_primitive())
-                    | (u64::from(operation.into_primitive()) << 8)
-                    | (u64::from(result.into_primitive()) << 16),
-            ),
-            PerfEventConfig::Raw { event_id } => (perf_type_id_to_u32(PERF_TYPE_RAW), event_id),
-            PerfEventConfig::Breakpoint => (perf_type_id_to_u32(PERF_TYPE_BREAKPOINT), 0),
-        };
-        let (sample_period, sample_frequency) = match sample_policy {
-            SamplePolicy::Period(period) => (period, None),
-            SamplePolicy::Frequency(frequency) => (0, Some(frequency)),
-        };
-        let (pid, cpu) = match scope {
-            PerfEventScope::CallingProcess { cpu } => (0, cpu.map_or(-1, |cpu| cpu as i32)),
-            PerfEventScope::OneProcess { pid, cpu } => (pid, cpu.map_or(-1, |cpu| cpu as i32)),
-            PerfEventScope::AllProcessesOneCpu { cpu } => (-1, cpu as i32),
-        };
         let fd = perf_event_open(
-            perf_type,
             config,
-            pid,
-            cpu,
-            sample_period,
-            sample_frequency,
-            false,
+            scope,
+            sample_policy,
+            WakeupPolicy::Events(1),
             inherit,
             0,
         )

aya/src/sys/perf_event.rs

@@ -7,53 +7,97 @@ use std::{
 use aya_obj::generated::{
     PERF_FLAG_FD_CLOEXEC, perf_event_attr,
     perf_event_sample_format::PERF_SAMPLE_RAW,
-    perf_sw_ids::PERF_COUNT_SW_BPF_OUTPUT,
-    perf_type_id::{PERF_TYPE_SOFTWARE, PERF_TYPE_TRACEPOINT},
+    perf_type_id::{
+        PERF_TYPE_BREAKPOINT, PERF_TYPE_HARDWARE, PERF_TYPE_HW_CACHE, PERF_TYPE_RAW,
+        PERF_TYPE_SOFTWARE, PERF_TYPE_TRACEPOINT,
+    },
 };
 use libc::pid_t;
 
 use super::{PerfEventIoctlRequest, Syscall, syscall};
+use crate::programs::perf_event::{
+    PerfEventConfig, PerfEventScope, SamplePolicy, SoftwareEvent, WakeupPolicy, perf_type_id_to_u32,
+};
 
-#[expect(clippy::too_many_arguments)]
 pub(crate) fn perf_event_open(
-    perf_type: u32,
-    config: u64,
-    pid: pid_t,
-    cpu: c_int,
-    sample_period: u64,
-    sample_frequency: Option<u64>,
-    wakeup: bool,
+    config: PerfEventConfig,
+    scope: PerfEventScope,
+    sample_policy: SamplePolicy,
+    wakeup_policy: WakeupPolicy,
     inherit: bool,
     flags: u32,
 ) -> io::Result<crate::MockableFd> {
     let mut attr = unsafe { mem::zeroed::<perf_event_attr>() };
 
+    let (perf_type, config) = match config {
+        PerfEventConfig::Pmu { pmu_type, config } => (pmu_type, config),
+        PerfEventConfig::Hardware(hw_event) => (
+            perf_type_id_to_u32(PERF_TYPE_HARDWARE),
+            u64::from(hw_event.into_primitive()),
+        ),
+        PerfEventConfig::Software(sw_event) => (
+            perf_type_id_to_u32(PERF_TYPE_SOFTWARE),
+            u64::from(sw_event.into_primitive()),
+        ),
+        PerfEventConfig::TracePoint { event_id } => {
+            (perf_type_id_to_u32(PERF_TYPE_TRACEPOINT), event_id)
+        }
+        PerfEventConfig::HwCache {
+            event,
+            operation,
+            result,
+        } => (
+            perf_type_id_to_u32(PERF_TYPE_HW_CACHE),
+            u64::from(event.into_primitive())
+                | (u64::from(operation.into_primitive()) << 8)
+                | (u64::from(result.into_primitive()) << 16),
+        ),
+        PerfEventConfig::Raw { event_id } => (perf_type_id_to_u32(PERF_TYPE_RAW), event_id),
+        PerfEventConfig::Breakpoint => (perf_type_id_to_u32(PERF_TYPE_BREAKPOINT), 0),
+    };
+
     attr.config = config;
     attr.size = mem::size_of::<perf_event_attr>() as u32;
     attr.type_ = perf_type;
     attr.sample_type = PERF_SAMPLE_RAW as u64;
     attr.set_inherit(if inherit { 1 } else { 0 });
-    attr.__bindgen_anon_2.wakeup_events = u32::from(wakeup);
 
-    if let Some(frequency) = sample_frequency {
+    match sample_policy {
+        SamplePolicy::Period(period) => {
+            attr.__bindgen_anon_1.sample_period = period;
+        }
+        SamplePolicy::Frequency(frequency) => {
             attr.set_freq(1);
             attr.__bindgen_anon_1.sample_freq = frequency;
-    } else {
-        attr.__bindgen_anon_1.sample_period = sample_period;
+        }
     }
 
+    match wakeup_policy {
+        WakeupPolicy::Events(events) => {
+            attr.__bindgen_anon_2.wakeup_events = events;
+        }
+        WakeupPolicy::Watermark(watermark) => {
+            attr.set_watermark(1);
+            attr.__bindgen_anon_2.wakeup_watermark = watermark;
+        }
+    }
+
+    let (pid, cpu) = match scope {
+        PerfEventScope::CallingProcess { cpu } => (0, cpu.map_or(-1, |cpu| cpu as i32)),
+        PerfEventScope::OneProcess { pid, cpu } => (pid, cpu.map_or(-1, |cpu| cpu as i32)),
+        PerfEventScope::AllProcessesOneCpu { cpu } => (-1, cpu as i32),
+    };
+
     perf_event_sys(attr, pid, cpu, flags)
 }
 
 pub(crate) fn perf_event_open_bpf(cpu: c_int) -> io::Result<crate::MockableFd> {
+    let cpu = cpu as u32;
     perf_event_open(
-        PERF_TYPE_SOFTWARE as u32,
-        PERF_COUNT_SW_BPF_OUTPUT as u64,
-        -1,
-        cpu,
-        1,
-        None,
-        true,
+        PerfEventConfig::Software(SoftwareEvent::BpfOutput),
+        PerfEventScope::AllProcessesOneCpu { cpu },
+        SamplePolicy::Period(1),
+        WakeupPolicy::Events(1),
         false,
         PERF_FLAG_FD_CLOEXEC,
     )

xtask/public-api/aya.txt

@@ -5517,6 +5517,7 @@ impl core::clone::Clone for aya::programs::perf_event::PerfEventScope
 pub fn aya::programs::perf_event::PerfEventScope::clone(&self) -> aya::programs::perf_event::PerfEventScope
 impl core::fmt::Debug for aya::programs::perf_event::PerfEventScope
 pub fn aya::programs::perf_event::PerfEventScope::fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result
+impl core::marker::Copy for aya::programs::perf_event::PerfEventScope
 impl core::marker::Freeze for aya::programs::perf_event::PerfEventScope
 impl core::marker::Send for aya::programs::perf_event::PerfEventScope
 impl core::marker::Sync for aya::programs::perf_event::PerfEventScope
@@ -5552,6 +5553,7 @@ impl core::clone::Clone for aya::programs::perf_event::SamplePolicy
 pub fn aya::programs::perf_event::SamplePolicy::clone(&self) -> aya::programs::perf_event::SamplePolicy
 impl core::fmt::Debug for aya::programs::perf_event::SamplePolicy
 pub fn aya::programs::perf_event::SamplePolicy::fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result
+impl core::marker::Copy for aya::programs::perf_event::SamplePolicy
 impl core::marker::Freeze for aya::programs::perf_event::SamplePolicy
 impl core::marker::Send for aya::programs::perf_event::SamplePolicy
 impl core::marker::Sync for aya::programs::perf_event::SamplePolicy
@@ -5629,7 +5631,7 @@ pub fn aya::programs::perf_event::SoftwareEvent::from(t: T) -> T
 pub struct aya::programs::perf_event::PerfEvent
 impl aya::programs::perf_event::PerfEvent
 pub const aya::programs::perf_event::PerfEvent::PROGRAM_TYPE: aya::programs::ProgramType
-pub fn aya::programs::perf_event::PerfEvent::attach(&mut self, perf_type: aya::programs::perf_event::PerfEventConfig, scope: aya::programs::perf_event::PerfEventScope, sample_policy: aya::programs::perf_event::SamplePolicy, inherit: bool) -> core::result::Result<aya::programs::perf_event::PerfEventLinkId, aya::programs::ProgramError>
+pub fn aya::programs::perf_event::PerfEvent::attach(&mut self, config: aya::programs::perf_event::PerfEventConfig, scope: aya::programs::perf_event::PerfEventScope, sample_policy: aya::programs::perf_event::SamplePolicy, inherit: bool) -> core::result::Result<aya::programs::perf_event::PerfEventLinkId, aya::programs::ProgramError>
 pub fn aya::programs::perf_event::PerfEvent::load(&mut self) -> core::result::Result<(), aya::programs::ProgramError>
 impl aya::programs::perf_event::PerfEvent
 pub fn aya::programs::perf_event::PerfEvent::detach(&mut self, link_id: aya::programs::perf_event::PerfEventLinkId) -> core::result::Result<(), aya::programs::ProgramError>
@@ -7940,46 +7942,6 @@ impl<T> core::clone::CloneToUninit for aya::programs::LsmAttachType where T: cor
 pub unsafe fn aya::programs::LsmAttachType::clone_to_uninit(&self, dest: *mut u8)
 impl<T> core::convert::From<T> for aya::programs::LsmAttachType
 pub fn aya::programs::LsmAttachType::from(t: T) -> T
-pub enum aya::programs::PerfEventScope
-pub aya::programs::PerfEventScope::AllProcessesOneCpu
-pub aya::programs::PerfEventScope::AllProcessesOneCpu::cpu: u32
-pub aya::programs::PerfEventScope::CallingProcess
-pub aya::programs::PerfEventScope::CallingProcess::cpu: core::option::Option<u32>
-pub aya::programs::PerfEventScope::OneProcess
-pub aya::programs::PerfEventScope::OneProcess::cpu: core::option::Option<u32>
-pub aya::programs::PerfEventScope::OneProcess::pid: i32
-impl core::clone::Clone for aya::programs::perf_event::PerfEventScope
-pub fn aya::programs::perf_event::PerfEventScope::clone(&self) -> aya::programs::perf_event::PerfEventScope
-impl core::fmt::Debug for aya::programs::perf_event::PerfEventScope
-pub fn aya::programs::perf_event::PerfEventScope::fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result
-impl core::marker::Freeze for aya::programs::perf_event::PerfEventScope
-impl core::marker::Send for aya::programs::perf_event::PerfEventScope
-impl core::marker::Sync for aya::programs::perf_event::PerfEventScope
-impl core::marker::Unpin for aya::programs::perf_event::PerfEventScope
-impl core::panic::unwind_safe::RefUnwindSafe for aya::programs::perf_event::PerfEventScope
-impl core::panic::unwind_safe::UnwindSafe for aya::programs::perf_event::PerfEventScope
-impl<T, U> core::convert::Into<U> for aya::programs::perf_event::PerfEventScope where U: core::convert::From<T>
-pub fn aya::programs::perf_event::PerfEventScope::into(self) -> U
-impl<T, U> core::convert::TryFrom<U> for aya::programs::perf_event::PerfEventScope where U: core::convert::Into<T>
-pub type aya::programs::perf_event::PerfEventScope::Error = core::convert::Infallible
-pub fn aya::programs::perf_event::PerfEventScope::try_from(value: U) -> core::result::Result<T, <T as core::convert::TryFrom<U>>::Error>
-impl<T, U> core::convert::TryInto<U> for aya::programs::perf_event::PerfEventScope where U: core::convert::TryFrom<T>
-pub type aya::programs::perf_event::PerfEventScope::Error = <U as core::convert::TryFrom<T>>::Error
-pub fn aya::programs::perf_event::PerfEventScope::try_into(self) -> core::result::Result<U, <U as core::convert::TryFrom<T>>::Error>
-impl<T> alloc::borrow::ToOwned for aya::programs::perf_event::PerfEventScope where T: core::clone::Clone
-pub type aya::programs::perf_event::PerfEventScope::Owned = T
-pub fn aya::programs::perf_event::PerfEventScope::clone_into(&self, target: &mut T)
-pub fn aya::programs::perf_event::PerfEventScope::to_owned(&self) -> T
-impl<T> core::any::Any for aya::programs::perf_event::PerfEventScope where T: 'static + ?core::marker::Sized
-pub fn aya::programs::perf_event::PerfEventScope::type_id(&self) -> core::any::TypeId
-impl<T> core::borrow::Borrow<T> for aya::programs::perf_event::PerfEventScope where T: ?core::marker::Sized
-pub fn aya::programs::perf_event::PerfEventScope::borrow(&self) -> &T
-impl<T> core::borrow::BorrowMut<T> for aya::programs::perf_event::PerfEventScope where T: ?core::marker::Sized
-pub fn aya::programs::perf_event::PerfEventScope::borrow_mut(&mut self) -> &mut T
-impl<T> core::clone::CloneToUninit for aya::programs::perf_event::PerfEventScope where T: core::clone::Clone
-pub unsafe fn aya::programs::perf_event::PerfEventScope::clone_to_uninit(&self, dest: *mut u8)
-impl<T> core::convert::From<T> for aya::programs::perf_event::PerfEventScope
-pub fn aya::programs::perf_event::PerfEventScope::from(t: T) -> T
 pub enum aya::programs::ProbeKind
 pub aya::programs::ProbeKind::KProbe
 pub aya::programs::ProbeKind::KRetProbe
@@ -8390,41 +8352,6 @@ impl<T> core::clone::CloneToUninit for aya::programs::ProgramType where T: core:
 pub unsafe fn aya::programs::ProgramType::clone_to_uninit(&self, dest: *mut u8)
 impl<T> core::convert::From<T> for aya::programs::ProgramType
 pub fn aya::programs::ProgramType::from(t: T) -> T
-pub enum aya::programs::SamplePolicy
-pub aya::programs::SamplePolicy::Frequency(u64)
-pub aya::programs::SamplePolicy::Period(u64)
-impl core::clone::Clone for aya::programs::perf_event::SamplePolicy
-pub fn aya::programs::perf_event::SamplePolicy::clone(&self) -> aya::programs::perf_event::SamplePolicy
-impl core::fmt::Debug for aya::programs::perf_event::SamplePolicy
-pub fn aya::programs::perf_event::SamplePolicy::fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result
-impl core::marker::Freeze for aya::programs::perf_event::SamplePolicy
-impl core::marker::Send for aya::programs::perf_event::SamplePolicy
-impl core::marker::Sync for aya::programs::perf_event::SamplePolicy
-impl core::marker::Unpin for aya::programs::perf_event::SamplePolicy
-impl core::panic::unwind_safe::RefUnwindSafe for aya::programs::perf_event::SamplePolicy
-impl core::panic::unwind_safe::UnwindSafe for aya::programs::perf_event::SamplePolicy
-impl<T, U> core::convert::Into<U> for aya::programs::perf_event::SamplePolicy where U: core::convert::From<T>
-pub fn aya::programs::perf_event::SamplePolicy::into(self) -> U
-impl<T, U> core::convert::TryFrom<U> for aya::programs::perf_event::SamplePolicy where U: core::convert::Into<T>
-pub type aya::programs::perf_event::SamplePolicy::Error = core::convert::Infallible
-pub fn aya::programs::perf_event::SamplePolicy::try_from(value: U) -> core::result::Result<T, <T as core::convert::TryFrom<U>>::Error>
-impl<T, U> core::convert::TryInto<U> for aya::programs::perf_event::SamplePolicy where U: core::convert::TryFrom<T>
-pub type aya::programs::perf_event::SamplePolicy::Error = <U as core::convert::TryFrom<T>>::Error
-pub fn aya::programs::perf_event::SamplePolicy::try_into(self) -> core::result::Result<U, <U as core::convert::TryFrom<T>>::Error>
-impl<T> alloc::borrow::ToOwned for aya::programs::perf_event::SamplePolicy where T: core::clone::Clone
-pub type aya::programs::perf_event::SamplePolicy::Owned = T
-pub fn aya::programs::perf_event::SamplePolicy::clone_into(&self, target: &mut T)
-pub fn aya::programs::perf_event::SamplePolicy::to_owned(&self) -> T
-impl<T> core::any::Any for aya::programs::perf_event::SamplePolicy where T: 'static + ?core::marker::Sized
-pub fn aya::programs::perf_event::SamplePolicy::type_id(&self) -> core::any::TypeId
-impl<T> core::borrow::Borrow<T> for aya::programs::perf_event::SamplePolicy where T: ?core::marker::Sized
-pub fn aya::programs::perf_event::SamplePolicy::borrow(&self) -> &T
-impl<T> core::borrow::BorrowMut<T> for aya::programs::perf_event::SamplePolicy where T: ?core::marker::Sized
-pub fn aya::programs::perf_event::SamplePolicy::borrow_mut(&mut self) -> &mut T
-impl<T> core::clone::CloneToUninit for aya::programs::perf_event::SamplePolicy where T: core::clone::Clone
-pub unsafe fn aya::programs::perf_event::SamplePolicy::clone_to_uninit(&self, dest: *mut u8)
-impl<T> core::convert::From<T> for aya::programs::perf_event::SamplePolicy
-pub fn aya::programs::perf_event::SamplePolicy::from(t: T) -> T
 pub enum aya::programs::SkSkbKind
 pub aya::programs::SkSkbKind::StreamParser
 pub aya::programs::SkSkbKind::StreamVerdict
@@ -9576,7 +9503,7 @@ pub fn aya::programs::lsm_cgroup::LsmCgroup::from(t: T) -> T
 pub struct aya::programs::PerfEvent
 impl aya::programs::perf_event::PerfEvent
 pub const aya::programs::perf_event::PerfEvent::PROGRAM_TYPE: aya::programs::ProgramType
-pub fn aya::programs::perf_event::PerfEvent::attach(&mut self, perf_type: aya::programs::perf_event::PerfEventConfig, scope: aya::programs::perf_event::PerfEventScope, sample_policy: aya::programs::perf_event::SamplePolicy, inherit: bool) -> core::result::Result<aya::programs::perf_event::PerfEventLinkId, aya::programs::ProgramError>
+pub fn aya::programs::perf_event::PerfEvent::attach(&mut self, config: aya::programs::perf_event::PerfEventConfig, scope: aya::programs::perf_event::PerfEventScope, sample_policy: aya::programs::perf_event::SamplePolicy, inherit: bool) -> core::result::Result<aya::programs::perf_event::PerfEventLinkId, aya::programs::ProgramError>
 pub fn aya::programs::perf_event::PerfEvent::load(&mut self) -> core::result::Result<(), aya::programs::ProgramError>
 impl aya::programs::perf_event::PerfEvent
 pub fn aya::programs::perf_event::PerfEvent::detach(&mut self, link_id: aya::programs::perf_event::PerfEventLinkId) -> core::result::Result<(), aya::programs::ProgramError>