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Diffstat (limited to 'lldb/source/Plugins/Process/Utility/UnwindLLDB.h')
| -rw-r--r-- | lldb/source/Plugins/Process/Utility/UnwindLLDB.h | 158 |
1 files changed, 0 insertions, 158 deletions
diff --git a/lldb/source/Plugins/Process/Utility/UnwindLLDB.h b/lldb/source/Plugins/Process/Utility/UnwindLLDB.h deleted file mode 100644 index ff5db39730b5..000000000000 --- a/lldb/source/Plugins/Process/Utility/UnwindLLDB.h +++ /dev/null @@ -1,158 +0,0 @@ -//===-- UnwindLLDB.h --------------------------------------------*- C++ -*-===// -// -// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. -// See https://llvm.org/LICENSE.txt for license information. -// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception -// -//===----------------------------------------------------------------------===// - -#ifndef lldb_UnwindLLDB_h_ -#define lldb_UnwindLLDB_h_ - -#include <vector> - -#include "lldb/Symbol/FuncUnwinders.h" -#include "lldb/Symbol/SymbolContext.h" -#include "lldb/Symbol/UnwindPlan.h" -#include "lldb/Target/RegisterContext.h" -#include "lldb/Target/Unwind.h" -#include "lldb/Utility/ConstString.h" -#include "lldb/lldb-public.h" - -namespace lldb_private { - -class RegisterContextLLDB; - -class UnwindLLDB : public lldb_private::Unwind { -public: - UnwindLLDB(lldb_private::Thread &thread); - - ~UnwindLLDB() override = default; - - 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; - }; - - 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, - bool &behaves_like_zeroth_frame) 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; - } - -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); - }; - - 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); -}; - -} // namespace lldb_private - -#endif // lldb_UnwindLLDB_h_ |