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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | //===---------------------- TableManager.h ----------------------*- C++ -*-===// |
| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // Fix edge for edge that needs an entry to reference the target symbol |
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| 10 | // |
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| 11 | //===----------------------------------------------------------------------===// |
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| 12 | |||
| 13 | #ifndef LLVM_EXECUTIONENGINE_JITLINK_TABLEMANAGER_H |
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| 14 | #define LLVM_EXECUTIONENGINE_JITLINK_TABLEMANAGER_H |
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| 15 | |||
| 16 | #include "llvm/ExecutionEngine/JITLink/JITLink.h" |
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| 17 | #include "llvm/Support/Debug.h" |
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| 18 | |||
| 19 | namespace llvm { |
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| 20 | namespace jitlink { |
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| 21 | |||
| 22 | /// A CRTP base for tables that are built on demand, e.g. Global Offset Tables |
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| 23 | /// and Procedure Linkage Tables. |
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| 24 | /// The getEntyrForTarget function returns the table entry corresponding to the |
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| 25 | /// given target, calling down to the implementation class to build an entry if |
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| 26 | /// one does not already exist. |
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| 27 | template <typename TableManagerImplT> class TableManager { |
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| 28 | public: |
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| 29 | /// Return the constructed entry |
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| 30 | /// |
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| 31 | /// Use parameter G to construct the entry for target symbol |
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| 32 | Symbol &getEntryForTarget(LinkGraph &G, Symbol &Target) { |
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| 33 | assert(Target.hasName() && "Edge cannot point to anonymous target"); |
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| 34 | |||
| 35 | auto EntryI = Entries.find(Target.getName()); |
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| 36 | |||
| 37 | // Build the entry if it doesn't exist. |
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| 38 | if (EntryI == Entries.end()) { |
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| 39 | auto &Entry = impl().createEntry(G, Target); |
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| 40 | DEBUG_WITH_TYPE("jitlink", { |
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| 41 | dbgs() << " Created " << impl().getSectionName() << "entry for " |
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| 42 | << Target.getName() << ": " << Entry << "\n"; |
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| 43 | }); |
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| 44 | EntryI = Entries.insert(std::make_pair(Target.getName(), &Entry)).first; |
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| 45 | } |
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| 46 | |||
| 47 | assert(EntryI != Entries.end() && "Could not get entry symbol"); |
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| 48 | DEBUG_WITH_TYPE("jitlink", { |
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| 49 | dbgs() << " Using " << impl().getSectionName() << " entry " |
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| 50 | << *EntryI->second << "\n"; |
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| 51 | }); |
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| 52 | return *EntryI->second; |
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| 53 | } |
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| 54 | |||
| 55 | private: |
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| 56 | TableManagerImplT &impl() { return static_cast<TableManagerImplT &>(*this); } |
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| 57 | DenseMap<StringRef, Symbol *> Entries; |
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| 58 | }; |
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| 59 | |||
| 60 | } // namespace jitlink |
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| 61 | } // namespace llvm |
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| 62 | |||
| 63 | #endif |