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proc/native/linux: ignore EIO after PTRACE_GETREGSET

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PTRACE_GETREGSET was added in Linux 2.6.34, running this request in an
older kernel will report EIO, as documented on the manpage.

Fixes #1197
This commit is contained in:
aarzilli 2018-11-30 10:44:36 +01:00 committed by Derek Parker
parent 7d06d2c032
commit cb386d0966
1 changed files with 2 additions and 1 deletions
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3
pkg/proc/native/ptrace_linux.go
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@ -68,8 +68,9 @@ func PtraceGetRegset(tid int) (regset linutil.AMD64Xstate, err error) {
iov := sys.Iovec{Base: &xstateargs[0], Len: _X86_XSTATE_MAX_SIZE}
_, _, err = syscall.Syscall6(syscall.SYS_PTRACE, sys.PTRACE_GETREGSET, uintptr(tid), _NT_X86_XSTATE, uintptr(unsafe.Pointer(&iov)), 0, 0)
if err != syscall.Errno(0) {
if err == syscall.ENODEV {
if err == syscall.ENODEV || err == syscall.EIO {
// ignore ENODEV, it just means this CPU or kernel doesn't support XSTATE, see https://github.com/derekparker/delve/issues/1022
// also ignore EIO, it means that we are running on an old kernel (pre 2.6.34) and PTRACE_GETREGSET is not implemented
err = nil
}
return