1 files changed, 71 insertions, 0 deletions
diff --git a/gdb/testsuite/gdb.python/py-unwind-inline.py b/gdb/testsuite/gdb.python/py-unwind-inline.py
new file mode 100644
index 0000000..7206a0b
--- /dev/null
+++ b/gdb/testsuite/gdb.python/py-unwind-inline.py
@@ -0,0 +1,71 @@
+# Copyright (C) 2020 Free Software Foundation, Inc.
+
+# 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/>.
+
+# A dummy stack unwinder used for testing the Python unwinders when we
+# have inline frames.  This unwinder will never claim any frames,
+# instead, all it does it try to read all registers possible target
+# registers as part of the frame sniffing process..
+
+import gdb
+from gdb.unwinder import Unwinder
+
+apb_global = None
+
+class dummy_unwinder (Unwinder):
+    """ A dummy unwinder that looks at a bunch of registers as part of
+    the unwinding process."""
+
+    class frame_id (object):
+        """ Basic frame id."""
+
+        def __init__ (self, sp, pc):
+            """ Create the frame id."""
+            self.sp = sp
+            self.pc = pc
+
+    def __init__ (self):
+        """Create the unwinder."""
+        Unwinder.__init__ (self, "dummy stack unwinder")
+        self.void_ptr_t = gdb.lookup_type("void").pointer()
+        self.regs = None
+
+    def get_regs (self, pending_frame):
+        """Return a list of register names that should be read.  Only
+        gathers the list once, then caches the result."""
+        if (self.regs != None):
+            return self.regs
+
+        # Collect the names of all registers to read.
+        self.regs = list (pending_frame.architecture ()
+                          .register_names ())
+
+        return self.regs
+
+    def __call__ (self, pending_frame):
+        """Actually performs the unwind, or at least sniffs this frame
+        to see if the unwinder should claim it, which is never does."""
+        try:
+            for r in (self.get_regs (pending_frame)):
+                v = pending_frame.read_register (r).cast (self.void_ptr_t)
+        except:
+            print ("Dummy unwinder, exception")
+            raise
+
+        return None
+
+# Register the ComRV stack unwinder.
+gdb.unwinder.register_unwinder (None, dummy_unwinder (), True)
+
+print ("Python script imported")