[PATCH] D140788: [DWARFLinkerNext] add AddressesMap interface.
Alexey Lapshin via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Sat Dec 31 02:04:31 PST 2022
avl updated this revision to Diff 485755.
avl added a comment.
changed signature for isLiveVariable and isLiveSubprogram.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D140788/new/
https://reviews.llvm.org/D140788
Files:
llvm/include/llvm/DWARFLinkerNext/AddressesMap.h
Index: llvm/include/llvm/DWARFLinkerNext/AddressesMap.h
===================================================================
--- /dev/null
+++ llvm/include/llvm/DWARFLinkerNext/AddressesMap.h
@@ -0,0 +1,71 @@
+//===- AddressesMap.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 LLVM_DWARFLINKERNEXT_ADDRESSESMAP_H
+#define LLVM_DWARFLINKERNEXT_ADDRESSESMAP_H
+
+#include "llvm/ADT/AddressRanges.h"
+#include "llvm/DebugInfo/DWARF/DWARFDie.h"
+#include <cstdint>
+
+namespace llvm {
+namespace dwarflinker {
+
+/// Mapped value in the address map is the offset to apply to the
+/// linked address.
+using RangesTy = AddressRangesMap<int64_t>;
+
+/// AddressesMap represents information about valid addresses used
+/// by debug information. Valid addresses are those which points to
+/// live code sections. i.e. relocations for these addresses point
+/// into sections which would be/are placed into resulting binary.
+class AddressesMap {
+public:
+ virtual ~AddressesMap() = default;
+
+ /// Checks that there are valid relocations against a .debug_info
+ /// section.
+ virtual bool hasValidRelocs() = 0;
+
+ /// Checks that the specified variable \p DIE references live code section
+ /// and returns variable address. Allowed kind of input die: DW_TAG_variable,
+ /// DW_TAG_constant.
+ /// \returns address value or std::nullopt if there is not corresponding live
+ /// address.
+ virtual std::optional<int64_t> getVariableAddress(const DWARFDie &DIE) = 0;
+
+ /// Checks that the specified subprogram \p DIE references live code section
+ /// and returns subprogram address. Allowed kind of input die:
+ /// DW_TAG_subprogram, DW_TAG_label.
+ /// \returns address value or std::nullopt if there is not corresponding live
+ /// address.
+ virtual std::optional<int64_t> getSubprogramAddress(const DWARFDie &DIE) = 0;
+
+ /// Apply the valid relocations to the buffer \p Data, taking into
+ /// account that Data is at \p BaseOffset in the .debug_info section.
+ ///
+ /// \returns true whether any reloc has been applied.
+ virtual bool applyValidRelocs(MutableArrayRef<char> Data, uint64_t BaseOffset,
+ bool IsLittleEndian) = 0;
+
+ /// Relocate the given address offset if a valid relocation exists.
+ virtual llvm::Expected<uint64_t> relocateIndexedAddr(uint64_t StartOffset,
+ uint64_t EndOffset) = 0;
+
+ /// Returns all valid functions address ranges(i.e., those ranges
+ /// which points to sections with code).
+ virtual RangesTy &getValidAddressRanges() = 0;
+
+ /// Erases all data.
+ virtual void clear() = 0;
+};
+
+} // end of namespace dwarflinker
+} // end namespace llvm
+
+#endif // LLVM_DWARFLINKERNEXT_ADDRESSESMAP_H
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