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debug/plan9obj: export ErrNoSymbols

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This allows callers of *File.Symbols to distinguish absence of symbols
from other errors as can already by done in debug/elf.

Fixes #48052

Change-Id: I5ba15d8473911e516c016a69c1f1c710f7fc4cd5
Reviewed-on: https://go-review.googlesource.com/c/go/+/350229
Run-TryBot: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>
This commit is contained in:
Dan Kortschak 2021-08-29 14:01:03 +09:30 committed by Ian Lance Taylor
parent 3e9e02412e
commit 58ec925270
1 changed files with 5 additions and 1 deletions
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6
src/debug/plan9obj/file.go
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@ -301,11 +301,15 @@ func newTable(symtab []byte, ptrsz int) ([]Sym, error) {
return syms, nil
}
// ErrNoSymbols is returned by File.Symbols if there is no such section
// in the File.
var ErrNoSymbols = errors.New("no symbol section")
// Symbols returns the symbol table for f.
func (f *File) Symbols() ([]Sym, error) {
symtabSection := f.Section("syms")
if symtabSection == nil {
return nil, errors.New("no symbol section")
return nil, ErrNoSymbols
}
symtab, err := symtabSection.Data()