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go.mod: runc v1.0.1

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Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
This commit is contained in:
Akihiro Suda
2021-07-18 20:19:58 +09:00
parent 43e0594ae9
commit a12c7bd1cf
23 changed files with 549 additions and 195 deletions
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66
vendor/github.com/cilium/ebpf/link/uprobe.go generated vendored
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@@ -35,6 +35,14 @@ type Executable struct {
symbols map[string]elf.Symbol
}
// UprobeOptions defines additional parameters that will be used
// when loading Uprobes.
type UprobeOptions struct {
// Symbol offset. Must be provided in case of external symbols (shared libs).
// If set, overrides the offset eventually parsed from the executable.
Offset uint64
}
// To open a new Executable, use:
//
// OpenExecutable("/bin/bash")
@@ -78,6 +86,10 @@ func (ex *Executable) addSymbols(f func() ([]elf.Symbol, error)) error {
return err
}
for _, s := range syms {
if elf.ST_TYPE(s.Info) != elf.STT_FUNC {
// Symbol not associated with a function or other executable code.
continue
}
ex.symbols[s.Name] = s
}
return nil
@@ -95,13 +107,18 @@ func (ex *Executable) symbol(symbol string) (*elf.Symbol, error) {
// For example, /bin/bash::main():
//
// ex, _ = OpenExecutable("/bin/bash")
// ex.Uprobe("main", prog)
// ex.Uprobe("main", prog, nil)
//
// When using symbols which belongs to shared libraries,
// an offset must be provided via options:
//
// ex.Uprobe("main", prog, &UprobeOptions{Offset: 0x123})
//
// The resulting Link must be Closed during program shutdown to avoid leaking
// system resources. Functions provided by shared libraries can currently not
// be traced and will result in an ErrNotSupported.
func (ex *Executable) Uprobe(symbol string, prog *ebpf.Program) (Link, error) {
u, err := ex.uprobe(symbol, prog, false)
func (ex *Executable) Uprobe(symbol string, prog *ebpf.Program, opts *UprobeOptions) (Link, error) {
u, err := ex.uprobe(symbol, prog, opts, false)
if err != nil {
return nil, err
}
@@ -119,13 +136,18 @@ func (ex *Executable) Uprobe(symbol string, prog *ebpf.Program) (Link, error) {
// before the given symbol exits. For example, /bin/bash::main():
//
// ex, _ = OpenExecutable("/bin/bash")
// ex.Uretprobe("main", prog)
// ex.Uretprobe("main", prog, nil)
//
// When using symbols which belongs to shared libraries,
// an offset must be provided via options:
//
// ex.Uretprobe("main", prog, &UprobeOptions{Offset: 0x123})
//
// The resulting Link must be Closed during program shutdown to avoid leaking
// system resources. Functions provided by shared libraries can currently not
// be traced and will result in an ErrNotSupported.
func (ex *Executable) Uretprobe(symbol string, prog *ebpf.Program) (Link, error) {
u, err := ex.uprobe(symbol, prog, true)
func (ex *Executable) Uretprobe(symbol string, prog *ebpf.Program, opts *UprobeOptions) (Link, error) {
u, err := ex.uprobe(symbol, prog, opts, true)
if err != nil {
return nil, err
}
@@ -141,7 +163,7 @@ func (ex *Executable) Uretprobe(symbol string, prog *ebpf.Program) (Link, error)
// uprobe opens a perf event for the given binary/symbol and attaches prog to it.
// If ret is true, create a uretprobe.
func (ex *Executable) uprobe(symbol string, prog *ebpf.Program, ret bool) (*perfEvent, error) {
func (ex *Executable) uprobe(symbol string, prog *ebpf.Program, opts *UprobeOptions, ret bool) (*perfEvent, error) {
if prog == nil {
return nil, fmt.Errorf("prog cannot be nil: %w", errInvalidInput)
}
@@ -149,20 +171,28 @@ func (ex *Executable) uprobe(symbol string, prog *ebpf.Program, ret bool) (*perf
return nil, fmt.Errorf("eBPF program type %s is not Kprobe: %w", prog.Type(), errInvalidInput)
}
sym, err := ex.symbol(symbol)
if err != nil {
return nil, fmt.Errorf("symbol '%s' not found in '%s': %w", symbol, ex.path, err)
}
var offset uint64
if opts != nil && opts.Offset != 0 {
offset = opts.Offset
} else {
sym, err := ex.symbol(symbol)
if err != nil {
return nil, fmt.Errorf("symbol '%s' not found: %w", symbol, err)
}
// Symbols with location 0 from section undef are shared library calls and
// are relocated before the binary is executed. Dynamic linking is not
// implemented by the library, so mark this as unsupported for now.
if sym.Section == elf.SHN_UNDEF && sym.Value == 0 {
return nil, fmt.Errorf("cannot resolve %s library call '%s': %w", ex.path, symbol, ErrNotSupported)
// Symbols with location 0 from section undef are shared library calls and
// are relocated before the binary is executed. Dynamic linking is not
// implemented by the library, so mark this as unsupported for now.
if sym.Section == elf.SHN_UNDEF && sym.Value == 0 {
return nil, fmt.Errorf("cannot resolve %s library call '%s', "+
"consider providing the offset via options: %w", ex.path, symbol, ErrNotSupported)
}
offset = sym.Value
}
// Use uprobe PMU if the kernel has it available.
tp, err := pmuUprobe(sym.Name, ex.path, sym.Value, ret)
tp, err := pmuUprobe(symbol, ex.path, offset, ret)
if err == nil {
return tp, nil
}
@@ -171,7 +201,7 @@ func (ex *Executable) uprobe(symbol string, prog *ebpf.Program, ret bool) (*perf
}
// Use tracefs if uprobe PMU is missing.
tp, err = tracefsUprobe(uprobeSanitizedSymbol(sym.Name), ex.path, sym.Value, ret)
tp, err = tracefsUprobe(uprobeSanitizedSymbol(symbol), ex.path, offset, ret)
if err != nil {
return nil, fmt.Errorf("creating trace event '%s:%s' in tracefs: %w", ex.path, symbol, err)
}