Have the FuncUnwinder object request & provide an architecture-defined

UnwindPlan for unwinding from the first instruction of an otherwise
unknown function call (GetUnwindPlanArchitectureDefaultAtFunctionEntry()).

Update RegisterContextLLDB::GetFullUnwindPlanForFrame() to detect the
case of a frame 0 at address 0x0 which indicates that we jumped through
a NULL function pointer.  Use the ABI's FunctionEntryUnwindPlan to
find the caller frame.

These changes make it so lldb can identify the calling frame correctly
in code like

int main ()
{
  void (*f)(void) = 0;
  f();
}

llvm-svn: 139760

1 files changed, 1 insertions, 1 deletions

diff --git a/lldb/source/Plugins/ABI/MacOSX-arm/ABIMacOSX_arm.cpp b/lldb/source/Plugins/ABI/MacOSX-arm/ABIMacOSX_arm.cpp
index 03fa88ed93a..6035b051559 100644
--- a/lldb/source/Plugins/ABI/MacOSX-arm/ABIMacOSX_arm.cpp
+++ b/lldb/source/Plugins/ABI/MacOSX-arm/ABIMacOSX_arm.cpp
@@ -538,7 +538,7 @@ ABIMacOSX_arm::CreateFunctionEntryUnwindPlan (UnwindPlan &unwind_plan)
     
     // All other registers are the same.
     
-    unwind_plan.SetSourceName (pluginName);
+    unwind_plan.SetSourceName ("arm at-func-entry default");
     return true;
 }