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bcc: attach probe with symbol addr #271

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bcc: attach probe with symbol addr #271

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34 changes: 34 additions & 0 deletions bcc/module.go
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Original file line number Diff line number Diff line change
Expand Up @@ -387,6 +387,23 @@ func (bpf *Module) AttachUprobe(name, symbol string, fd, pid int) error {
return bpf.attachUProbe(evName, BPF_PROBE_ENTRY, path, addr, fd, pid)
}

// AttachUprobeWithSymbolAddr attaches a uprobe fd to the specified `symbolAddr` in the library or binary 'name'
// The 'name' argument can be given as either a full library path (/usr/lib/..),
// a library without the lib prefix, or as a binary with full path (/bin/bash)
// A pid can be given to attach to, or -1 to attach to all processes
//
// Presently attempts to trace processes running in a different namespace
// to the tracer will fail due to limitations around namespace-switching
// in multi-threaded programs (such as Go programs)
func (bpf *Module) AttachUprobeWithSymbolAddr(name string, symbolAddr uint64, fd, pid int) error {
path, addr, err := resolveSymbolPath(name, "", symbolAddr, pid)
if err != nil {
return err
}
evName := fmt.Sprintf("p_%s_0x%x", uprobeRegexp.ReplaceAllString(path, "_"), addr)
return bpf.attachUProbe(evName, BPF_PROBE_ENTRY, path, addr, fd, pid)
}

// AttachMatchingUprobes attaches a uprobe fd to all symbols in the library or binary
// 'name' that match a given pattern.
// The 'name' argument can be given as either a full library path (/usr/lib/..),
Expand Down Expand Up @@ -429,6 +446,23 @@ func (bpf *Module) AttachUretprobe(name, symbol string, fd, pid int) error {
return bpf.attachUProbe(evName, BPF_PROBE_RETURN, path, addr, fd, pid)
}

// AttachUretprobeWithSymbolAddr attaches a uretprobe fd to the specified `symbolAddr` in the library or binary 'name'
// The 'name' argument can be given as either a full library path (/usr/lib/..),
// a library without the lib prefix, or as a binary with full path (/bin/bash)
// A pid can be given to attach to, or -1 to attach to all processes
//
// Presently attempts to trace processes running in a different namespace
// to the tracer will fail due to limitations around namespace-switching
// in multi-threaded programs (such as Go programs)
func (bpf *Module) AttachUretprobeWithSymbolAddr(name string, symbolAddr uint64, fd, pid int) error {
path, addr, err := resolveSymbolPath(name, "", symbolAddr, pid)
if err != nil {
return err
}
evName := fmt.Sprintf("r_%s_0x%x", uprobeRegexp.ReplaceAllString(path, "_"), addr)
return bpf.attachUProbe(evName, BPF_PROBE_RETURN, path, addr, fd, pid)
}

// AttachMatchingUretprobes attaches a uretprobe fd to all symbols in the library or binary
// 'name' that match a given pattern.
// The 'name' argument can be given as either a full library path (/usr/lib/..),
Expand Down