58be07b28c
subclasses will automatically be able to take advantage of caching. The cache line size is set to 512 by default. This greatly speeds up stack backtraces on MacOSX when using the ProcessGDBRemote process plug-in since only about 6300 packets per second can be sent. Initial speedups show: Prior to caching: 10,000 stack frames took 5.2 seconds After caching: 10,000 stack frames in 240 ms! About a 20x speedup! llvm-svn: 122996
78 lines
2.2 KiB
C++
78 lines
2.2 KiB
C++
//===-- UnwindLLDB.h --------------------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#ifndef lldb_UnwindLLDB_h_
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#define lldb_UnwindLLDB_h_
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#include "lldb/lldb-private.h"
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#include "lldb/lldb-types.h"
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#include "lldb/Target/Unwind.h"
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#include "lldb/Symbol/FuncUnwinders.h"
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#include "lldb/Symbol/UnwindPlan.h"
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#include "RegisterContextLLDB.h"
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#include "lldb/Target/RegisterContext.h"
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#include <vector>
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namespace lldb_private {
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class UnwindLLDB : public lldb_private::Unwind
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{
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public:
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UnwindLLDB (lldb_private::Thread &thread);
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virtual
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~UnwindLLDB() { }
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void
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Clear()
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{
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m_frames.clear();
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}
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virtual uint32_t
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GetFrameCount();
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bool
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GetFrameInfoAtIndex (uint32_t frame_idx,
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lldb::addr_t& cfa,
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lldb::addr_t& start_pc);
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lldb::RegisterContextSP
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CreateRegisterContextForFrame (lldb_private::StackFrame *frame);
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private:
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struct Cursor
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{
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lldb::addr_t start_pc; // The start address of the function/symbol for this frame - current pc if unknown
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lldb::addr_t cfa; // The canonical frame address for this stack frame
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lldb_private::SymbolContext sctx; // A symbol context we'll contribute to & provide to the StackFrame creation
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lldb::RegisterContextSP reg_ctx; // These are all RegisterContextLLDB's
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Cursor () : start_pc (LLDB_INVALID_ADDRESS), cfa (LLDB_INVALID_ADDRESS), sctx(), reg_ctx() { }
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private:
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DISALLOW_COPY_AND_ASSIGN (Cursor);
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};
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typedef lldb::SharedPtr<Cursor>::Type CursorSP;
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std::vector<CursorSP> m_frames;
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bool AddOneMoreFrame ();
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bool AddFirstFrame ();
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//------------------------------------------------------------------
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// For UnwindLLDB only
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//------------------------------------------------------------------
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DISALLOW_COPY_AND_ASSIGN (UnwindLLDB);
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};
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} // namespace lldb_private
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#endif // lldb_UnwindLLDB_h_
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