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platform/ptrace: return more detailed errors

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Right now, if we can't create a stub process, we will see this error:
panic: unable to activate mm: resource temporarily unavailable

It would be better to know the root cause of this "resource temporarily
unavailable".

PiperOrigin-RevId: 255656831
This commit is contained in:
Andrei Vagin
2019-06-28 13:23:36 -07:00
committed by gVisor bot
parent 7c13789818
commit e21d49c2d8
1 changed files with 2 additions and 2 deletions
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pkg/sentry/platform/ptrace/subprocess_linux.go
+2 -2
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@@ -306,7 +306,7 @@ func (s *subprocess) createStub() (*thread, error) {
arch.SyscallArgument{Value: 0},
arch.SyscallArgument{Value: 0})
if err != nil {
return nil, err
return nil, fmt.Errorf("creating stub process: %v", err)
}
// Wait for child to enter group-stop, so we don't stop its
@@ -325,7 +325,7 @@ func (s *subprocess) createStub() (*thread, error) {
arch.SyscallArgument{Value: 0},
arch.SyscallArgument{Value: 0})
if err != nil {
return nil, err
return nil, fmt.Errorf("waiting on stub process: %v", err)
}
childT := &thread{