[binutils-gdb] gdb: add inferior_cloned observable

[Simon Marchi]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=c6ae604573f9e9d7b7a15388bdba2d1dabecd131

commit c6ae604573f9e9d7b7a15388bdba2d1dabecd131
Author: Simon Marchi <simon.marchi@efficios.com>
Date:   Thu Apr 13 16:18:34 2023 -0400

    gdb: add inferior_cloned observable
    
    The following patch makes the amdgpu port transfer a property from the
    original inferior to the new inferior when using the clone-inferior
    command.  Add the inferior_cloned observable to help with this.
    
    Change-Id: Id845a799813ec49b1b7b2fcb97b07d0a1e5e2631
    Approved-By: Tom Tromey <tom@tromey.com>

Diff:
---
 gdb/inferior.c   | 2 ++
 gdb/observable.c | 1 +
 gdb/observable.h | 4 ++++
 3 files changed, 7 insertions(+)

diff --git a/gdb/inferior.c b/gdb/inferior.c
index ce4960a508a..550bbd2827c 100644
--- a/gdb/inferior.c
+++ b/gdb/inferior.c
@@ -1041,6 +1041,8 @@ clone_inferior_command (const char *args, int from_tty)
       for (const std::string &unset_var
 	   : orginf->environment.user_unset_env ())
 	inf->environment.unset (unset_var.c_str ());
+
+      gdb::observers::inferior_cloned.notify (orginf, inf);
     }
 }
 
diff --git a/gdb/observable.c b/gdb/observable.c
index a18b863fb47..33e51223cf4 100644
--- a/gdb/observable.c
+++ b/gdb/observable.c
@@ -58,6 +58,7 @@ DEFINE_OBSERVABLE (inferior_appeared);
 DEFINE_OBSERVABLE (inferior_pre_detach);
 DEFINE_OBSERVABLE (inferior_exit);
 DEFINE_OBSERVABLE (inferior_removed);
+DEFINE_OBSERVABLE (inferior_cloned);
 DEFINE_OBSERVABLE (memory_changed);
 DEFINE_OBSERVABLE (before_prompt);
 DEFINE_OBSERVABLE (gdb_datadir_changed);
diff --git a/gdb/observable.h b/gdb/observable.h
index c0bafc51f14..4ea203c6fc3 100644
--- a/gdb/observable.h
+++ b/gdb/observable.h
@@ -172,6 +172,10 @@ extern observable<struct inferior */* inf */> inferior_exit;
    This method is called immediately before freeing INF.  */
 extern observable<struct inferior */* inf */> inferior_removed;
 
+/* The inferior CLONE has been created by cloning INF.  */
+extern observable<struct inferior */* inf */, struct inferior */* clone */>
+    inferior_cloned;
+
 /* Bytes from DATA to DATA + LEN have been written to the inferior
    at ADDR.  */
 extern observable<struct inferior */* inferior */, CORE_ADDR /* addr */,