Handle StackFrameFormat in DAP

DAP specifies a StackFrameFormat object that can be used to change how
the "name" part of a stack frame is constructed.  While this output
can already be done in a nicer way (and also letting the client choose
the formatting), nevertheless it is in the spec, so I figured I'd
implement it.

While implementing this, I discovered that the current code does not
correctly preserve frame IDs across requests.  I rewrote frame
iteration to preserve this, and it turned out to be simpler to combine
these patches.

Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=30475

1 files changed, 41 insertions, 0 deletions

diff --git a/gdb/testsuite/gdb.dap/stack-format.c b/gdb/testsuite/gdb.dap/stack-format.c
new file mode 100644
index 0000000..80759e5
--- /dev/null
+++ b/gdb/testsuite/gdb.dap/stack-format.c
@@ -0,0 +1,41 @@
+/* Copyright 2023 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+int function (int x, char y)
+{
+  return y - x - 1;			/* BREAK */
+}
+
+int z_1 (int x, char y)
+{
+  return function (x, y);
+}
+
+int z_2 (int x, char y)
+{
+  return z_1 (x, y);
+}
+
+int z_3 (int x, char y)
+{
+  return z_2 (x, y);
+}
+
+int main ()
+{
+  return z_3 (64, 'A');
+}