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//===-- Unwind.h ------------------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef liblldb_Unwind_h_
#define liblldb_Unwind_h_
// C Includes
// C++ Includes
// Other libraries and framework includes
// Project includes
#include "lldb/lldb-private.h"
#include "lldb/Host/Mutex.h"
namespace lldb_private {
class Unwind
{
protected:
//------------------------------------------------------------------
// Classes that inherit from Unwind can see and modify these
//------------------------------------------------------------------
Unwind(Thread &thread) :
m_thread (thread),
m_unwind_mutex(Mutex::eMutexTypeRecursive)
{
}
public:
virtual
~Unwind()
{
}
void
Clear()
{
Mutex::Locker locker(m_unwind_mutex);
DoClear();
}
uint32_t
GetFrameCount()
{
Mutex::Locker locker(m_unwind_mutex);
return DoGetFrameCount();
}
uint32_t
GetFramesUpTo (uint32_t end_idx)
{
lldb::addr_t cfa;
lldb::addr_t pc;
uint32_t idx;
for (idx = 0; idx < end_idx; idx++)
{
if (!DoGetFrameInfoAtIndex (idx, cfa, pc))
{
break;
}
}
return idx;
}
bool
GetFrameInfoAtIndex (uint32_t frame_idx,
lldb::addr_t& cfa,
lldb::addr_t& pc)
{
Mutex::Locker locker(m_unwind_mutex);
return DoGetFrameInfoAtIndex (frame_idx, cfa, pc);
}
lldb::RegisterContextSP
CreateRegisterContextForFrame (StackFrame *frame)
{
Mutex::Locker locker(m_unwind_mutex);
return DoCreateRegisterContextForFrame (frame);
}
Thread &
GetThread()
{
return m_thread;
}
protected:
//------------------------------------------------------------------
// Classes that inherit from Unwind can see and modify these
//------------------------------------------------------------------
virtual void
DoClear() = 0;
virtual uint32_t
DoGetFrameCount() = 0;
virtual bool
DoGetFrameInfoAtIndex (uint32_t frame_idx,
lldb::addr_t& cfa,
lldb::addr_t& pc) = 0;
virtual lldb::RegisterContextSP
DoCreateRegisterContextForFrame (StackFrame *frame) = 0;
Thread &m_thread;
Mutex m_unwind_mutex;
private:
DISALLOW_COPY_AND_ASSIGN (Unwind);
};
} // namespace lldb_private
#endif // liblldb_Unwind_h_
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