| //===-- 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 |
| #include <mutex> |
| |
| // Other libraries and framework includes |
| // Project includes |
| #include "lldb/lldb-private.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() {} |
| |
| public: |
| virtual ~Unwind() {} |
| |
| void Clear() { |
| std::lock_guard<std::recursive_mutex> guard(m_unwind_mutex); |
| DoClear(); |
| } |
| |
| uint32_t GetFrameCount() { |
| std::lock_guard<std::recursive_mutex> guard(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) { |
| std::lock_guard<std::recursive_mutex> guard(m_unwind_mutex); |
| return DoGetFrameInfoAtIndex(frame_idx, cfa, pc); |
| } |
| |
| lldb::RegisterContextSP CreateRegisterContextForFrame(StackFrame *frame) { |
| std::lock_guard<std::recursive_mutex> guard(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; |
| std::recursive_mutex m_unwind_mutex; |
| |
| private: |
| DISALLOW_COPY_AND_ASSIGN(Unwind); |
| }; |
| |
| } // namespace lldb_private |
| |
| #endif // liblldb_Unwind_h_ |