648f3c7efa
.ARM.exidx/.ARM.extab sections contain unwind information used on ARM architecture from unwinding from an exception. Differential revision: http://reviews.llvm.org/D13245 llvm-svn: 248903
81 lines
2.4 KiB
C++
81 lines
2.4 KiB
C++
//===-- Symtab.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 liblldb_UnwindTable_h
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#define liblldb_UnwindTable_h
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#include <map>
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#include "lldb/lldb-private.h"
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#include "lldb/Host/Mutex.h"
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namespace lldb_private {
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// A class which holds all the FuncUnwinders objects for a given ObjectFile.
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// The UnwindTable is populated with FuncUnwinders objects lazily during
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// the debug session.
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class UnwindTable
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{
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public:
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UnwindTable(ObjectFile& objfile);
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~UnwindTable();
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lldb_private::DWARFCallFrameInfo *
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GetEHFrameInfo ();
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lldb_private::CompactUnwindInfo *
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GetCompactUnwindInfo ();
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ArmUnwindInfo *
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GetArmUnwindInfo ();
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lldb::FuncUnwindersSP
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GetFuncUnwindersContainingAddress (const Address& addr, SymbolContext &sc);
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// Normally when we create a new FuncUnwinders object we track it in this UnwindTable so it can
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// be reused later. But for the target modules show-unwind we want to create brand new
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// UnwindPlans for the function of interest - so ignore any existing FuncUnwinders for that
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// function and don't add this new one to our UnwindTable.
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// This FuncUnwinders object does have a reference to the UnwindTable but the lifetime of this
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// uncached FuncUnwinders is expected to be short so in practice this will not be a problem.
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lldb::FuncUnwindersSP
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GetUncachedFuncUnwindersContainingAddress (const Address& addr, SymbolContext &sc);
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bool
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GetArchitecture (lldb_private::ArchSpec &arch);
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private:
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void
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Dump (Stream &s);
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void Initialize ();
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typedef std::map<lldb::addr_t, lldb::FuncUnwindersSP> collection;
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typedef collection::iterator iterator;
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typedef collection::const_iterator const_iterator;
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ObjectFile& m_object_file;
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collection m_unwinds;
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bool m_initialized; // delay some initialization until ObjectFile is set up
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Mutex m_mutex;
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std::unique_ptr<DWARFCallFrameInfo> m_eh_frame_up;
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std::unique_ptr<CompactUnwindInfo> m_compact_unwind_up;
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std::unique_ptr<ArmUnwindInfo> m_arm_unwind_up;
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DISALLOW_COPY_AND_ASSIGN (UnwindTable);
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};
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} // namespace lldb_private
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#endif // liblldb_UnwindTable_h
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