File gdb-python-make-gdb.unwindinfo.add_saved_register-mo-fixup.patch of Package gdb-debuginfod

From fc73000faa1798573090994167b7e2d451c211db Mon Sep 17 00:00:00 2001
From: Tom de Vries <tdevries@suse.de>
Date: Fri, 10 May 2024 08:46:21 +0200
Subject: [PATCH] [gdb/python] Make gdb.UnwindInfo.add_saved_register more
 robust (fixup)

In commit 2236c5e384d ("[gdb/python] Make gdb.UnwindInfo.add_saved_register
more robust") I added this code in unwind_infopy_add_saved_register:
...
  if (value->optimized_out () || !value->entirely_available ())
...
which may throw c++ exceptions.

This needs to be caught and transformed into a python exception.

Fix this by using GDB_PY_HANDLE_EXCEPTION.

Tested on x86_64-linux.

Approved-By: Tom Tromey <tom@tromey.com>

Fixes: 2236c5e384d ("[gdb/python] Make gdb.UnwindInfo.add_saved_register more robust")
(cherry picked from commit 408bc9c5fc757bd4b8adb1c3d54ecd672beaedb7)
---
 gdb/python/py-unwind.c | 26 +++++++++++++++++---------
 1 file changed, 17 insertions(+), 9 deletions(-)

diff --git a/gdb/python/py-unwind.c b/gdb/python/py-unwind.c
index 471eb851674..e57c8c1adcf 100644
--- a/gdb/python/py-unwind.c
+++ b/gdb/python/py-unwind.c
@@ -354,16 +354,24 @@ unwind_infopy_add_saved_register (PyObject *self, PyObject *args, PyObject *kw)
       return nullptr;
     }
 
-  if (value->optimized_out () || !value->entirely_available ())
+
+  try
+    {
+      if (value->optimized_out () || !value->entirely_available ())
+	{
+	  /* If we allow this value to be registered here, pyuw_sniffer is going
+	     to run into an exception when trying to access its contents.
+	     Throwing an exception here just puts a burden on the user to
+	     implement the same checks on the user side.  We could return False
+	     here and True otherwise, but again that might require changes in
+	     user code.  So, handle this with minimal impact for the user, while
+	     improving robustness: silently ignore the register/value pair.  */
+	  Py_RETURN_NONE;
+	}
+    }
+  catch (const gdb_exception &except)
     {
-      /* If we allow this value to be registered here, pyuw_sniffer is going
-	 to run into an exception when trying to access its contents.
-	 Throwing an exception here just puts a burden on the user to
-	 implement the same checks on the user side.  We could return False
-	 here and True otherwise, but again that might require changes in user
-	 code.  So, handle this with minimal impact for the user, while
-	 improving robustness: silently ignore the register/value pair.  */
-      Py_RETURN_NONE;
+      GDB_PY_HANDLE_EXCEPTION (except);
     }
 
   gdbpy_ref<> new_value = gdbpy_ref<>::new_reference (pyo_reg_value);

base-commit: a6f598be3d0477c5c59bd490573a5d457949658e
-- 
2.35.3