Read the LSDA and Personality Routine function address out of the

eh_frame data.  These two pieces of information are used in the
process of exception handler unwinding on SysV ABI systems.

This patch reads the data from the eh_frame section 
(DWARFCallFrameInfo.cpp), allows for it to be saved & read out
of a given UnwindPlan (UnwindPlan.h, UnwindPlan.cpp) - as well
as printing the information in the UnwindPlan::Dump method - and
adds methods to the FuncUnwinders object so that higher levels
can query if a given function has an LSDA / personality routine
defined.

It's only lightly tested, but seems to be working correctly as long
as your have this information in eh_frame.  Does not address getting
this information from compact unwind yet on Darwin systems.

<rdar://problem/18742797> 

llvm-svn: 222214

1 files changed, 33 insertions, 0 deletions

diff --git a/lldb/source/Symbol/FuncUnwinders.cpp b/lldb/source/Symbol/FuncUnwinders.cpp
index bee84cba748..2c4797916b1 100644
--- a/lldb/source/Symbol/FuncUnwinders.cpp
+++ b/lldb/source/Symbol/FuncUnwinders.cpp
@@ -209,3 +209,36 @@ FuncUnwinders::GetUnwindAssemblyProfiler ()
     }
     return assembly_profiler_sp;
 }
+
+Address
+FuncUnwinders::GetLSDAAddress () const
+{
+    Address lsda_addr;
+    if (m_unwind_plan_non_call_site_sp->GetLSDAAddress().IsValid())
+    {
+        lsda_addr = m_unwind_plan_non_call_site_sp->GetLSDAAddress().IsValid();
+    }
+    else if (m_unwind_plan_call_site_sp->GetLSDAAddress().IsValid())
+    {
+        lsda_addr = m_unwind_plan_non_call_site_sp->GetLSDAAddress().IsValid();
+    }
+
+    return lsda_addr;
+}
+
+
+Address
+FuncUnwinders::GetPersonalityRoutinePtrAddress () const
+{
+    Address personality_addr;
+    if (m_unwind_plan_non_call_site_sp->GetPersonalityFunctionPtr().IsValid())
+    {
+        personality_addr = m_unwind_plan_non_call_site_sp->GetPersonalityFunctionPtr().IsValid();
+    }
+    else if (m_unwind_plan_call_site_sp->GetPersonalityFunctionPtr().IsValid())
+    {
+        personality_addr = m_unwind_plan_non_call_site_sp->GetPersonalityFunctionPtr().IsValid();
+    }
+
+    return personality_addr;
+}