6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
98 lines
3.5 KiB
C++
98 lines
3.5 KiB
C++
//===-- UnwindTable.h -------------------------------------------*- C++ -*-===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLDB_SYMBOL_UNWINDTABLE_H
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#define LLDB_SYMBOL_UNWINDTABLE_H
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#include <map>
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#include <mutex>
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#include <optional>
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#include "lldb/lldb-private.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 the
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// debug session.
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class UnwindTable {
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public:
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/// Create an Unwind table using the data in the given module.
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explicit UnwindTable(Module &module);
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~UnwindTable();
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lldb_private::CallFrameInfo *GetObjectFileUnwindInfo();
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lldb_private::DWARFCallFrameInfo *GetEHFrameInfo();
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lldb_private::DWARFCallFrameInfo *GetDebugFrameInfo();
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lldb_private::CompactUnwindInfo *GetCompactUnwindInfo();
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ArmUnwindInfo *GetArmUnwindInfo();
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SymbolFile *GetSymbolFile();
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lldb::FuncUnwindersSP GetFuncUnwindersContainingAddress(const Address &addr,
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SymbolContext &sc);
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bool GetAllowAssemblyEmulationUnwindPlans();
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// Normally when we create a new FuncUnwinders object we track it in this
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// UnwindTable so it can be reused later. But for the target modules show-
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// unwind we want to create brand new UnwindPlans for the function of
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// interest - so ignore any existing FuncUnwinders for that function and
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// don't add this new one to our UnwindTable. This FuncUnwinders object does
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// have a reference to the UnwindTable but the lifetime of this uncached
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// FuncUnwinders is expected to be short so in practice this will not be a
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// problem.
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lldb::FuncUnwindersSP
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GetUncachedFuncUnwindersContainingAddress(const Address &addr,
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const SymbolContext &sc);
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ArchSpec GetArchitecture();
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/// Called after an ObjectFile/SymbolFile has been added to a Module to add
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/// any new unwind sections that may now be available.
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void ModuleWasUpdated();
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private:
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void Dump(Stream &s);
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void Initialize();
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std::optional<AddressRange> GetAddressRange(const Address &addr,
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const SymbolContext &sc);
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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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Module &m_module;
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collection m_unwinds;
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bool m_scanned_all_unwind_sources; // true when we have looked at the
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// ObjectFile and SymbolFile for all
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// sources of unwind information; false if
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// we haven't done that yet, or one of the
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// files has been updated in the Module.
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std::mutex m_mutex;
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std::unique_ptr<CallFrameInfo> m_object_file_unwind_up;
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std::unique_ptr<DWARFCallFrameInfo> m_eh_frame_up;
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std::unique_ptr<DWARFCallFrameInfo> m_debug_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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UnwindTable(const UnwindTable &) = delete;
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const UnwindTable &operator=(const UnwindTable &) = delete;
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};
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} // namespace lldb_private
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#endif // LLDB_SYMBOL_UNWINDTABLE_H
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