2ccf7ed277
Use SymbolStringPtr for Symbol names in LinkGraph. This reduces string interning on the boundary between JITLink and ORC, and allows pointer comparisons (rather than string comparisons) between Symbol names. This should improve the performance and readability of code that bridges between JITLink and ORC (e.g. ObjectLinkingLayer and ObjectLinkingLayer::Plugins). To enable use of SymbolStringPtr a std::shared_ptr<SymbolStringPool> is added to LinkGraph and threaded through to its construction sites in LLVM and Bolt. All LinkGraphs that are to have symbol names compared by pointer equality must point to the same SymbolStringPool instance, which in ORC sessions should be the pool attached to the ExecutionSession. --------- Co-authored-by: Lang Hames <lhames@gmail.com>
41 lines
1.4 KiB
C++
41 lines
1.4 KiB
C++
//===------- COFF.h - Generic JIT link function for COFF ------*- 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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//
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// Generic jit-link functions for COFF.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_EXECUTIONENGINE_JITLINK_COFF_H
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#define LLVM_EXECUTIONENGINE_JITLINK_COFF_H
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#include "llvm/ExecutionEngine/JITLink/JITLink.h"
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namespace llvm {
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namespace jitlink {
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/// Create a LinkGraph from an COFF relocatable object.
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///
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/// Note: The graph does not take ownership of the underlying buffer, nor copy
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/// its contents. The caller is responsible for ensuring that the object buffer
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/// outlives the graph.
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Expected<std::unique_ptr<LinkGraph>>
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createLinkGraphFromCOFFObject(MemoryBufferRef ObjectBuffer,
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std::shared_ptr<orc::SymbolStringPool> SSP);
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/// Link the given graph.
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///
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/// Uses conservative defaults for GOT and stub handling based on the target
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/// platform.
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void link_COFF(std::unique_ptr<LinkGraph> G,
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std::unique_ptr<JITLinkContext> Ctx);
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} // end namespace jitlink
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} // end namespace llvm
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#endif // LLVM_EXECUTIONENGINE_JITLINK_COFF_H
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