diff options
Diffstat (limited to 'source/Plugins/Process/Utility/UnwindLLDB.h')
| -rw-r--r-- | source/Plugins/Process/Utility/UnwindLLDB.h | 248 |
1 files changed, 125 insertions, 123 deletions
diff --git a/source/Plugins/Process/Utility/UnwindLLDB.h b/source/Plugins/Process/Utility/UnwindLLDB.h index d3c07078759b..b9323032180d 100644 --- a/source/Plugins/Process/Utility/UnwindLLDB.h +++ b/source/Plugins/Process/Utility/UnwindLLDB.h @@ -16,148 +16,150 @@ // Other libraries and framework includes // Project includes -#include "lldb/lldb-public.h" #include "lldb/Core/ConstString.h" #include "lldb/Symbol/FuncUnwinders.h" #include "lldb/Symbol/UnwindPlan.h" #include "lldb/Target/RegisterContext.h" #include "lldb/Target/Unwind.h" +#include "lldb/lldb-public.h" namespace lldb_private { class RegisterContextLLDB; -class UnwindLLDB : public lldb_private::Unwind -{ -public: - UnwindLLDB (lldb_private::Thread &thread); +class UnwindLLDB : public lldb_private::Unwind { +public: + UnwindLLDB(lldb_private::Thread &thread); - ~UnwindLLDB() override = default; + ~UnwindLLDB() override = default; - enum RegisterSearchResult - { - eRegisterFound = 0, - eRegisterNotFound, - eRegisterIsVolatile - }; + enum RegisterSearchResult { + eRegisterFound = 0, + eRegisterNotFound, + eRegisterIsVolatile + }; protected: - friend class lldb_private::RegisterContextLLDB; - - struct RegisterLocation { - enum RegisterLocationTypes - { - eRegisterNotSaved = 0, // register was not preserved by callee. If volatile reg, is unavailable - eRegisterSavedAtMemoryLocation, // register is saved at a specific word of target mem (target_memory_location) - eRegisterInRegister, // register is available in a (possible other) register (register_number) - eRegisterSavedAtHostMemoryLocation, // register is saved at a word in lldb's address space - eRegisterValueInferred, // register val was computed (and is in inferred_value) - eRegisterInLiveRegisterContext // register value is in a live (stack frame #0) register - }; - int type; - union - { - lldb::addr_t target_memory_location; - uint32_t register_number; // in eRegisterKindLLDB register numbering system - void* host_memory_location; - uint64_t inferred_value; // eRegisterValueInferred - e.g. stack pointer == cfa + offset - } location; + friend class lldb_private::RegisterContextLLDB; + + struct RegisterLocation { + enum RegisterLocationTypes { + eRegisterNotSaved = 0, // register was not preserved by callee. If + // volatile reg, is unavailable + eRegisterSavedAtMemoryLocation, // register is saved at a specific word of + // target mem (target_memory_location) + eRegisterInRegister, // register is available in a (possible other) + // register (register_number) + eRegisterSavedAtHostMemoryLocation, // register is saved at a word in + // lldb's address space + eRegisterValueInferred, // register val was computed (and is in + // inferred_value) + eRegisterInLiveRegisterContext // register value is in a live (stack frame + // #0) register }; + int type; + union { + lldb::addr_t target_memory_location; + uint32_t + register_number; // in eRegisterKindLLDB register numbering system + void *host_memory_location; + uint64_t inferred_value; // eRegisterValueInferred - e.g. stack pointer == + // cfa + offset + } location; + }; + + void DoClear() override { + m_frames.clear(); + m_candidate_frame.reset(); + m_unwind_complete = false; + } + + uint32_t DoGetFrameCount() override; + + bool DoGetFrameInfoAtIndex(uint32_t frame_idx, lldb::addr_t &cfa, + lldb::addr_t &start_pc) override; + + lldb::RegisterContextSP + DoCreateRegisterContextForFrame(lldb_private::StackFrame *frame) override; + + typedef std::shared_ptr<RegisterContextLLDB> RegisterContextLLDBSP; + + // Needed to retrieve the "next" frame (e.g. frame 2 needs to retrieve frame + // 1's RegisterContextLLDB) + // The RegisterContext for frame_num must already exist or this returns an + // empty shared pointer. + RegisterContextLLDBSP GetRegisterContextForFrameNum(uint32_t frame_num); + + // Iterate over the RegisterContextLLDB's in our m_frames vector, look for the + // first one that + // has a saved location for this reg. + bool SearchForSavedLocationForRegister( + uint32_t lldb_regnum, lldb_private::UnwindLLDB::RegisterLocation ®loc, + uint32_t starting_frame_num, bool pc_register); + + //------------------------------------------------------------------ + /// Provide the list of user-specified trap handler functions + /// + /// The Platform is one source of trap handler function names; that + /// may be augmented via a setting. The setting needs to be converted + /// into an array of ConstStrings before it can be used - we only want + /// to do that once per thread so it's here in the UnwindLLDB object. + /// + /// @return + /// Vector of ConstStrings of trap handler function names. May be + /// empty. + //------------------------------------------------------------------ + const std::vector<ConstString> &GetUserSpecifiedTrapHandlerFunctionNames() { + return m_user_supplied_trap_handler_functions; + } - void - DoClear() override - { - m_frames.clear(); - m_candidate_frame.reset(); - m_unwind_complete = false; - } - - uint32_t - DoGetFrameCount() override; - - bool - DoGetFrameInfoAtIndex(uint32_t frame_idx, - lldb::addr_t& cfa, - lldb::addr_t& start_pc) override; - - lldb::RegisterContextSP - DoCreateRegisterContextForFrame(lldb_private::StackFrame *frame) override; - - typedef std::shared_ptr<RegisterContextLLDB> RegisterContextLLDBSP; - - // Needed to retrieve the "next" frame (e.g. frame 2 needs to retrieve frame 1's RegisterContextLLDB) - // The RegisterContext for frame_num must already exist or this returns an empty shared pointer. +private: + struct Cursor { + lldb::addr_t start_pc; // The start address of the function/symbol for this + // frame - current pc if unknown + lldb::addr_t cfa; // The canonical frame address for this stack frame + lldb_private::SymbolContext sctx; // A symbol context we'll contribute to & + // provide to the StackFrame creation RegisterContextLLDBSP - GetRegisterContextForFrameNum (uint32_t frame_num); - - // Iterate over the RegisterContextLLDB's in our m_frames vector, look for the first one that - // has a saved location for this reg. - bool - SearchForSavedLocationForRegister (uint32_t lldb_regnum, lldb_private::UnwindLLDB::RegisterLocation ®loc, uint32_t starting_frame_num, bool pc_register); - - - //------------------------------------------------------------------ - /// Provide the list of user-specified trap handler functions - /// - /// The Platform is one source of trap handler function names; that - /// may be augmented via a setting. The setting needs to be converted - /// into an array of ConstStrings before it can be used - we only want - /// to do that once per thread so it's here in the UnwindLLDB object. - /// - /// @return - /// Vector of ConstStrings of trap handler function names. May be - /// empty. - //------------------------------------------------------------------ - const std::vector<ConstString> & - GetUserSpecifiedTrapHandlerFunctionNames () - { - return m_user_supplied_trap_handler_functions; - } + reg_ctx_lldb_sp; // These are all RegisterContextLLDB's -private: - struct Cursor - { - lldb::addr_t start_pc; // The start address of the function/symbol for this frame - current pc if unknown - lldb::addr_t cfa; // The canonical frame address for this stack frame - lldb_private::SymbolContext sctx; // A symbol context we'll contribute to & provide to the StackFrame creation - RegisterContextLLDBSP reg_ctx_lldb_sp; // These are all RegisterContextLLDB's - - Cursor () : start_pc (LLDB_INVALID_ADDRESS), cfa (LLDB_INVALID_ADDRESS), sctx(), reg_ctx_lldb_sp() { } - private: - DISALLOW_COPY_AND_ASSIGN (Cursor); - }; + Cursor() + : start_pc(LLDB_INVALID_ADDRESS), cfa(LLDB_INVALID_ADDRESS), sctx(), + reg_ctx_lldb_sp() {} + + private: + DISALLOW_COPY_AND_ASSIGN(Cursor); + }; + + typedef std::shared_ptr<Cursor> CursorSP; + std::vector<CursorSP> m_frames; + CursorSP m_candidate_frame; + bool m_unwind_complete; // If this is true, we've enumerated all the frames in + // the stack, and m_frames.size() is the + // number of frames, etc. Otherwise we've only gone as far as directly asked, + // and m_frames.size() + // is how far we've currently gone. + + std::vector<ConstString> m_user_supplied_trap_handler_functions; + + //----------------------------------------------------------------- + // Check if Full UnwindPlan of First frame is valid or not. + // If not then try Fallback UnwindPlan of the frame. If Fallback + // UnwindPlan succeeds then update the Full UnwindPlan with the + // Fallback UnwindPlan. + //----------------------------------------------------------------- + void UpdateUnwindPlanForFirstFrameIfInvalid(ABI *abi); + + CursorSP GetOneMoreFrame(ABI *abi); + + bool AddOneMoreFrame(ABI *abi); + + bool AddFirstFrame(); - typedef std::shared_ptr<Cursor> CursorSP; - std::vector<CursorSP> m_frames; - CursorSP m_candidate_frame; - bool m_unwind_complete; // If this is true, we've enumerated all the frames in the stack, and m_frames.size() is the - // number of frames, etc. Otherwise we've only gone as far as directly asked, and m_frames.size() - // is how far we've currently gone. - - std::vector<ConstString> m_user_supplied_trap_handler_functions; - - //----------------------------------------------------------------- - // Check if Full UnwindPlan of First frame is valid or not. - // If not then try Fallback UnwindPlan of the frame. If Fallback - // UnwindPlan succeeds then update the Full UnwindPlan with the - // Fallback UnwindPlan. - //----------------------------------------------------------------- - void - UpdateUnwindPlanForFirstFrameIfInvalid (ABI* abi); - - CursorSP - GetOneMoreFrame (ABI* abi); - - bool - AddOneMoreFrame (ABI *abi); - - bool - AddFirstFrame (); - - //------------------------------------------------------------------ - // For UnwindLLDB only - //------------------------------------------------------------------ - DISALLOW_COPY_AND_ASSIGN (UnwindLLDB); + //------------------------------------------------------------------ + // For UnwindLLDB only + //------------------------------------------------------------------ + DISALLOW_COPY_AND_ASSIGN(UnwindLLDB); }; } // namespace lldb_private |