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	[chore]: Bump github.com/KimMachineGun/automemlimit from 0.2.4 to 0.2.5 (#1666)
Bumps [github.com/KimMachineGun/automemlimit](https://github.com/KimMachineGun/automemlimit) from 0.2.4 to 0.2.5. - [Release notes](https://github.com/KimMachineGun/automemlimit/releases) - [Commits](https://github.com/KimMachineGun/automemlimit/compare/v0.2.4...v0.2.5) --- updated-dependencies: - dependency-name: github.com/KimMachineGun/automemlimit dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
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								vendor/github.com/cilium/ebpf/link/tracing.go
									
										
									
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								vendor/github.com/cilium/ebpf/link/tracing.go
									
										
									
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							|  | @ -0,0 +1,141 @@ | |||
| package link | ||||
| 
 | ||||
| import ( | ||||
| 	"fmt" | ||||
| 
 | ||||
| 	"github.com/cilium/ebpf" | ||||
| 	"github.com/cilium/ebpf/btf" | ||||
| 	"github.com/cilium/ebpf/internal/sys" | ||||
| ) | ||||
| 
 | ||||
| type tracing struct { | ||||
| 	RawLink | ||||
| } | ||||
| 
 | ||||
| func (f *tracing) Update(new *ebpf.Program) error { | ||||
| 	return fmt.Errorf("tracing update: %w", ErrNotSupported) | ||||
| } | ||||
| 
 | ||||
| // AttachFreplace attaches the given eBPF program to the function it replaces. | ||||
| // | ||||
| // The program and name can either be provided at link time, or can be provided | ||||
| // at program load time. If they were provided at load time, they should be nil | ||||
| // and empty respectively here, as they will be ignored by the kernel. | ||||
| // Examples: | ||||
| // | ||||
| //	AttachFreplace(dispatcher, "function", replacement) | ||||
| //	AttachFreplace(nil, "", replacement) | ||||
| func AttachFreplace(targetProg *ebpf.Program, name string, prog *ebpf.Program) (Link, error) { | ||||
| 	if (name == "") != (targetProg == nil) { | ||||
| 		return nil, fmt.Errorf("must provide both or neither of name and targetProg: %w", errInvalidInput) | ||||
| 	} | ||||
| 	if prog == nil { | ||||
| 		return nil, fmt.Errorf("prog cannot be nil: %w", errInvalidInput) | ||||
| 	} | ||||
| 	if prog.Type() != ebpf.Extension { | ||||
| 		return nil, fmt.Errorf("eBPF program type %s is not an Extension: %w", prog.Type(), errInvalidInput) | ||||
| 	} | ||||
| 
 | ||||
| 	var ( | ||||
| 		target int | ||||
| 		typeID btf.TypeID | ||||
| 	) | ||||
| 	if targetProg != nil { | ||||
| 		btfHandle, err := targetProg.Handle() | ||||
| 		if err != nil { | ||||
| 			return nil, err | ||||
| 		} | ||||
| 		defer btfHandle.Close() | ||||
| 
 | ||||
| 		spec, err := btfHandle.Spec(nil) | ||||
| 		if err != nil { | ||||
| 			return nil, err | ||||
| 		} | ||||
| 
 | ||||
| 		var function *btf.Func | ||||
| 		if err := spec.TypeByName(name, &function); err != nil { | ||||
| 			return nil, err | ||||
| 		} | ||||
| 
 | ||||
| 		target = targetProg.FD() | ||||
| 		typeID, err = spec.TypeID(function) | ||||
| 		if err != nil { | ||||
| 			return nil, err | ||||
| 		} | ||||
| 	} | ||||
| 
 | ||||
| 	link, err := AttachRawLink(RawLinkOptions{ | ||||
| 		Target:  target, | ||||
| 		Program: prog, | ||||
| 		Attach:  ebpf.AttachNone, | ||||
| 		BTF:     typeID, | ||||
| 	}) | ||||
| 	if err != nil { | ||||
| 		return nil, err | ||||
| 	} | ||||
| 
 | ||||
| 	return &tracing{*link}, nil | ||||
| } | ||||
| 
 | ||||
| type TracingOptions struct { | ||||
| 	// Program must be of type Tracing with attach type | ||||
| 	// AttachTraceFEntry/AttachTraceFExit/AttachModifyReturn or | ||||
| 	// AttachTraceRawTp. | ||||
| 	Program *ebpf.Program | ||||
| } | ||||
| 
 | ||||
| type LSMOptions struct { | ||||
| 	// Program must be of type LSM with attach type | ||||
| 	// AttachLSMMac. | ||||
| 	Program *ebpf.Program | ||||
| } | ||||
| 
 | ||||
| // attachBTFID links all BPF program types (Tracing/LSM) that they attach to a btf_id. | ||||
| func attachBTFID(program *ebpf.Program) (Link, error) { | ||||
| 	if program.FD() < 0 { | ||||
| 		return nil, fmt.Errorf("invalid program %w", sys.ErrClosedFd) | ||||
| 	} | ||||
| 
 | ||||
| 	fd, err := sys.RawTracepointOpen(&sys.RawTracepointOpenAttr{ | ||||
| 		ProgFd: uint32(program.FD()), | ||||
| 	}) | ||||
| 	if err != nil { | ||||
| 		return nil, err | ||||
| 	} | ||||
| 
 | ||||
| 	raw := RawLink{fd: fd} | ||||
| 	info, err := raw.Info() | ||||
| 	if err != nil { | ||||
| 		raw.Close() | ||||
| 		return nil, err | ||||
| 	} | ||||
| 
 | ||||
| 	if info.Type == RawTracepointType { | ||||
| 		// Sadness upon sadness: a Tracing program with AttachRawTp returns | ||||
| 		// a raw_tracepoint link. Other types return a tracing link. | ||||
| 		return &rawTracepoint{raw}, nil | ||||
| 	} | ||||
| 
 | ||||
| 	return &tracing{RawLink: RawLink{fd: fd}}, nil | ||||
| } | ||||
| 
 | ||||
| // AttachTracing links a tracing (fentry/fexit/fmod_ret) BPF program or | ||||
| // a BTF-powered raw tracepoint (tp_btf) BPF Program to a BPF hook defined | ||||
| // in kernel modules. | ||||
| func AttachTracing(opts TracingOptions) (Link, error) { | ||||
| 	if t := opts.Program.Type(); t != ebpf.Tracing { | ||||
| 		return nil, fmt.Errorf("invalid program type %s, expected Tracing", t) | ||||
| 	} | ||||
| 
 | ||||
| 	return attachBTFID(opts.Program) | ||||
| } | ||||
| 
 | ||||
| // AttachLSM links a Linux security module (LSM) BPF Program to a BPF | ||||
| // hook defined in kernel modules. | ||||
| func AttachLSM(opts LSMOptions) (Link, error) { | ||||
| 	if t := opts.Program.Type(); t != ebpf.LSM { | ||||
| 		return nil, fmt.Errorf("invalid program type %s, expected LSM", t) | ||||
| 	} | ||||
| 
 | ||||
| 	return attachBTFID(opts.Program) | ||||
| } | ||||
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