Enable multi-process mode in the NetBSD native target.

This enables proper support for multiple inferiors and ptrace(2)
assisted management of the inferior processes and their threads.

(gdb) info inferior
  Num  Description       Connection           Executable
* 1    process 14952     1 (native)           /usr/bin/dig
  2    <null>            1 (native)
  3    process 25684     1 (native)           /bin/ls
  4    <null>            1 (native)           /bin/ls

Without this patch, additional inferiors can be added, but not
properly controlled.

gdb/ChangeLog:

        * nbsd-nat.h (nbsd_nat_target::supports_multi_process): New
        declaration.
        * nbsd-nat.c (nbsd_nat_target::supports_multi_process): New
        function.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index fad4608002f6b3abfcedc977e512f1e6b552065b..eec2d55800edd310996842c8d659318ec5593498 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,10 @@
+2020-07-21  Kamil Rytarowski  <n54@gmx.com>
+
+       * nbsd-nat.h (nbsd_nat_target::supports_multi_process): New
+       declaration.
+       * nbsd-nat.c (nbsd_nat_target::supports_multi_process): New
+       function.
+
 2020-07-20  John Baldwin  <jhb@FreeBSD.org>
 
        * fbsd-tdep.c (fbsd_skip_solib_resolver): New function.

diff --git a/gdb/nbsd-nat.c b/gdb/nbsd-nat.c
index 254a768eb370a3116df4c3b530f6a02d4f30a738..a9405ebf862d712807cc3a68e545d8686d679e48 100644 (file)
--- a/gdb/nbsd-nat.c
+++ b/gdb/nbsd-nat.c
@@ -837,3 +837,11 @@ nbsd_nat_target::set_syscall_catchpoint (int pid, bool needed,
      are filtered by GDB rather than the kernel.  */
   return 0;
 }
+
+/* Implement the "supports_multi_process" target_ops method. */
+
+bool
+nbsd_nat_target::supports_multi_process ()
+{
+  return true;
+}

diff --git a/gdb/nbsd-nat.h b/gdb/nbsd-nat.h
index 4a8b96026e638ae3686e89b32eff1f31bb00ec22..0a7048ecf357e79a0a369373529739ad7fa0a392 100644 (file)
--- a/gdb/nbsd-nat.h
+++ b/gdb/nbsd-nat.h
@@ -48,6 +48,7 @@ struct nbsd_nat_target : public inf_ptrace_target
                              gdb::array_view<const int> syscall_counts)
     override;
 
+  bool supports_multi_process () override;
 };
 
 #endif /* nbsd-nat.h */