1 files changed, 126 insertions, 0 deletions
diff --git a/lldb/source/Symbol/FuncUnwinders.cpp b/lldb/source/Symbol/FuncUnwinders.cpp
new file mode 100644
index 00000000000..7998cf14eff
--- /dev/null
+++ b/lldb/source/Symbol/FuncUnwinders.cpp
@@ -0,0 +1,126 @@
+//===-- FuncUnwinders.cpp ----------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/lldb-private.h"
+#include "lldb/Symbol/FuncUnwinders.h"
+#include "lldb/Symbol/ObjectFile.h"
+#include "lldb/Symbol/UnwindPlan.h"
+#include "lldb/Core/AddressRange.h"
+#include "lldb/Core/Address.h"
+#include "lldb/Symbol/UnwindTable.h"
+#include "lldb/Utility/UnwindAssemblyProfiler.h"
+#include "lldb/Utility/ArchDefaultUnwindPlan.h"
+#include "lldb/Symbol/DWARFCallFrameInfo.h"
+#include "lldb/Target/Thread.h"
+#include "lldb/Target/Target.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+
+FuncUnwinders::FuncUnwinders (UnwindTable& unwind_table, UnwindAssemblyProfiler *assembly_profiler, AddressRange range) : 
+        m_unwind_table(unwind_table), 
+        m_assembly_profiler(assembly_profiler), 
+        m_range(range), 
+        m_unwind_at_call_site(NULL), 
+        m_unwind_at_non_call_site(NULL), 
+        m_fast_unwind(NULL), 
+        m_arch_default_unwind(NULL), 
+        m_first_non_prologue_insn() { }
+
+FuncUnwinders::~FuncUnwinders () 
+{ 
+  if (m_unwind_at_call_site)
+      delete m_unwind_at_call_site;
+  if (m_unwind_at_non_call_site)
+      delete m_unwind_at_non_call_site;
+  if (m_fast_unwind)
+      delete m_fast_unwind;
+  if (m_arch_default_unwind)
+      delete m_arch_default_unwind;
+}
+
+UnwindPlan*
+FuncUnwinders::GetUnwindPlanAtCallSite ()
+{
+    if (m_unwind_at_call_site != NULL)
+        return m_unwind_at_call_site;
+    if (!m_range.GetBaseAddress().IsValid())
+        return NULL;
+
+    DWARFCallFrameInfo *eh_frame = m_unwind_table.GetEHFrameInfo();
+    if (eh_frame)
+    {
+        UnwindPlan *up = new UnwindPlan;
+        if (eh_frame->GetUnwindPlan (m_range.GetBaseAddress (), *up) == true)
+        {
+            m_unwind_at_call_site = up;
+            return m_unwind_at_call_site;
+        }
+    }
+    return NULL;
+}
+
+UnwindPlan*
+FuncUnwinders::GetUnwindPlanAtNonCallSite (Thread& thread)
+{
+    if (m_unwind_at_non_call_site != NULL)
+        m_unwind_at_non_call_site;
+    m_unwind_at_non_call_site = new UnwindPlan;
+    m_assembly_profiler->GetNonCallSiteUnwindPlanFromAssembly (m_range, thread, *m_unwind_at_non_call_site);
+    return m_unwind_at_non_call_site;
+}
+
+UnwindPlan*
+FuncUnwinders::GetUnwindPlanFastUnwind (Thread& thread)
+{
+    if (m_fast_unwind != NULL)
+        return m_fast_unwind;
+    m_fast_unwind = new UnwindPlan;
+    m_assembly_profiler->GetFastUnwindPlan (m_range, thread, *m_fast_unwind);
+    return m_fast_unwind;
+}
+
+UnwindPlan*
+FuncUnwinders::GetUnwindPlanArchitectureDefault (Thread& thread)
+{
+    if (m_arch_default_unwind != NULL)
+        return m_arch_default_unwind;
+
+    Address current_pc;
+    Target *target = thread.CalculateTarget();
+    ArchSpec arch;
+    if (target)
+    {
+        ArchSpec arch = target->GetArchitecture ();
+        ArchDefaultUnwindPlan *arch_default = ArchDefaultUnwindPlan::FindPlugin (arch);
+        if (arch_default)
+        {
+            m_arch_default_unwind = arch_default->GetArchDefaultUnwindPlan (thread, current_pc);
+        }
+    }
+
+    return m_arch_default_unwind;
+}
+
+Address&
+FuncUnwinders::GetFirstNonPrologueInsn (Target& target)
+{
+    if (m_first_non_prologue_insn.IsValid())
+        return m_first_non_prologue_insn;
+    m_assembly_profiler->FirstNonPrologueInsn (m_range, target, NULL, m_first_non_prologue_insn);
+    return m_first_non_prologue_insn;
+}
+
+const Address&
+FuncUnwinders::GetFunctionStartAddress () const
+{
+    return m_range.GetBaseAddress();
+}
+