[Lldb-commits] [lldb] [lldb/aarch64] Fix unwinding when signal interrupts a leaf function (PR #91321)

[Pavel Labath via lldb-commits]

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@@ -1555,12 +1555,12 @@ RegisterContextUnwind::SavedLocationForRegister(
   }
 
   if (unwindplan_regloc.IsSame()) {
-    if (!IsFrameZero() &&
+    if (!m_all_registers_available &&
         (regnum.GetAsKind(eRegisterKindGeneric) == LLDB_REGNUM_GENERIC_PC ||
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labath wrote:

`pc=<same>` is probably still only valid for real frame zero, so we could make the `m_all_registers_available` check `lr`-only.

.. or drop the lr check entirely, since some non-ABI-respecting functions could actually preserve the value of lr even if they are not leaf functions.

https://github.com/llvm/llvm-project/pull/91321