[PATCH v4] Add support for NetBSD threads in sparc-nat.c

[Simon Marchi]

On 2020-03-17 12:46 p.m., Kamil Rytarowski wrote:
> NetBSD ptrace(2) accepts thread id (LWP) as the 4th argument for threads.
> 
> This file is still shared with other targets that use different 4th argument
> type, that is always unused.
> ---
>  gdb/sparc-nat.c | 50 ++++++++++++++++++++++---------------------------
>  1 file changed, 22 insertions(+), 28 deletions(-)
> 
> diff --git a/gdb/sparc-nat.c b/gdb/sparc-nat.c
> index dff0f521565..10cc01375ed 100644
> --- a/gdb/sparc-nat.c
> +++ b/gdb/sparc-nat.c
> @@ -78,6 +78,19 @@ typedef struct fp_status fpregset_t;
>  #define PTRACE_SETFPREGS PT_SETFPREGS
>  #endif
> 
> +static int
> +gdb_ptrace (int request, ptid_t pid, void *addr)
> +{
> +#ifdef __NetBSD__
> +  /* Support for NetBSD threads: unlike other ptrace implementations in this
> +     file, NetBSD requires that we pass both the pid and lwp.  */
> +  return ptrace (request, ptid (). pid (), addr, ptid ().lwp ());

Does that even build?  ptid isn't the name of a parameter, and the parenthesis after
"ptid" should not be there.  Rename the pid parameter to ptid, and replace the above
with "ptid.pid ()" and "ptid.lwp ()".

Simon