4f89157b9d
std::chrono::duration types are not thread-safe, and they cannot be concurrently updated from multiple threads. Currently, we were doing such a thing (only) in the DWARF indexing code (DWARFUnit::ExtractDIEsRWLocked), but I think it can easily happen that someone else tries to update another statistic like this without bothering to check for thread safety. This patch changes the StatsDuration type from a simple typedef into a class in its own right. The class stores the duration internally as std::atomic<uint64_t> (so it can be updated atomically), but presents it to its users as the usual chrono type (duration<float>). Differential Revision: https://reviews.llvm.org/D117474
107 lines
4.0 KiB
C++
107 lines
4.0 KiB
C++
//===-- DWARFIndex.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_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFINDEX_H
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#define LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFINDEX_H
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#include "Plugins/SymbolFile/DWARF/DIERef.h"
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#include "Plugins/SymbolFile/DWARF/DWARFDIE.h"
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#include "Plugins/SymbolFile/DWARF/DWARFFormValue.h"
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#include "lldb/Target/Statistics.h"
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class DWARFDeclContext;
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class DWARFDIE;
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namespace lldb_private {
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class DWARFIndex {
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public:
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DWARFIndex(Module &module) : m_module(module) {}
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virtual ~DWARFIndex();
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virtual void Preload() = 0;
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/// Finds global variables with the given base name. Any additional filtering
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/// (e.g., to only retrieve variables from a given context) should be done by
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/// the consumer.
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virtual void
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GetGlobalVariables(ConstString basename,
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llvm::function_ref<bool(DWARFDIE die)> callback) = 0;
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virtual void
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GetGlobalVariables(const RegularExpression ®ex,
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llvm::function_ref<bool(DWARFDIE die)> callback) = 0;
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/// \a cu must be the skeleton unit if possible, not GetNonSkeletonUnit().
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virtual void
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GetGlobalVariables(DWARFUnit &cu,
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llvm::function_ref<bool(DWARFDIE die)> callback) = 0;
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virtual void
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GetObjCMethods(ConstString class_name,
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llvm::function_ref<bool(DWARFDIE die)> callback) = 0;
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virtual void
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GetCompleteObjCClass(ConstString class_name, bool must_be_implementation,
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llvm::function_ref<bool(DWARFDIE die)> callback) = 0;
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virtual void GetTypes(ConstString name,
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llvm::function_ref<bool(DWARFDIE die)> callback) = 0;
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virtual void GetTypes(const DWARFDeclContext &context,
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llvm::function_ref<bool(DWARFDIE die)> callback) = 0;
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virtual void
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GetNamespaces(ConstString name,
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llvm::function_ref<bool(DWARFDIE die)> callback) = 0;
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virtual void
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GetFunctions(ConstString name, SymbolFileDWARF &dwarf,
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const CompilerDeclContext &parent_decl_ctx,
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uint32_t name_type_mask,
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llvm::function_ref<bool(DWARFDIE die)> callback) = 0;
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virtual void
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GetFunctions(const RegularExpression ®ex,
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llvm::function_ref<bool(DWARFDIE die)> callback) = 0;
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virtual void Dump(Stream &s) = 0;
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StatsDuration::Duration GetIndexTime() { return m_index_time; }
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protected:
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Module &m_module;
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StatsDuration m_index_time;
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/// Helper function implementing common logic for processing function dies. If
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/// the function given by "ref" matches search criteria given by
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/// "parent_decl_ctx" and "name_type_mask", it is inserted into the "dies"
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/// vector.
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bool ProcessFunctionDIE(llvm::StringRef name, DIERef ref,
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SymbolFileDWARF &dwarf,
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const CompilerDeclContext &parent_decl_ctx,
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uint32_t name_type_mask,
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llvm::function_ref<bool(DWARFDIE die)> callback);
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class DIERefCallbackImpl {
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public:
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DIERefCallbackImpl(const DWARFIndex &index,
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llvm::function_ref<bool(DWARFDIE die)> callback,
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llvm::StringRef name);
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bool operator()(DIERef ref) const;
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private:
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const DWARFIndex &m_index;
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SymbolFileDWARF &m_dwarf;
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const llvm::function_ref<bool(DWARFDIE die)> m_callback;
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const llvm::StringRef m_name;
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};
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DIERefCallbackImpl
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DIERefCallback(llvm::function_ref<bool(DWARFDIE die)> callback,
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llvm::StringRef name = {}) const {
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return DIERefCallbackImpl(*this, callback, name);
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}
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void ReportInvalidDIERef(DIERef ref, llvm::StringRef name) const;
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};
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} // namespace lldb_private
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#endif // LLDB_SOURCE_PLUGINS_SYMBOLFILE_DWARF_DWARFINDEX_H
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