6024e5c395
clang 20.0.0 (based on r547379) from build 12806354. Bug: http://b/379133546 Test: N/A Change-Id: I2eb8938af55d809de674be63cb30cf27e801862b Upstream-Commit: ad834e67b1105d15ef907f6255d4c96e8e733f57
62 lines
1.9 KiB
C++
62 lines
1.9 KiB
C++
//===- CommonLinkerContext.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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//
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// Entry point for all global state in lldCommon. The objective is for LLD to be
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// used "as a library" in a thread-safe manner.
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//
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// Instead of program-wide globals or function-local statics, we prefer
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// aggregating all "global" states into a heap-based structure
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// (CommonLinkerContext). This also achieves deterministic initialization &
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// shutdown for all "global" states.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLD_COMMON_COMMONLINKINGCONTEXT_H
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#define LLD_COMMON_COMMONLINKINGCONTEXT_H
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#include "lld/Common/ErrorHandler.h"
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#include "lld/Common/Memory.h"
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#include "llvm/Support/StringSaver.h"
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namespace llvm {
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class raw_ostream;
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} // namespace llvm
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namespace lld {
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struct SpecificAllocBase;
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class CommonLinkerContext {
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public:
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CommonLinkerContext();
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virtual ~CommonLinkerContext();
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static void destroy();
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llvm::BumpPtrAllocator bAlloc;
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llvm::StringSaver saver{bAlloc};
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llvm::DenseMap<void *, SpecificAllocBase *> instances;
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ErrorHandler e;
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};
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// Retrieve the global state. Currently only one state can exist per process,
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// but in the future we plan on supporting an arbitrary number of LLD instances
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// in a single process.
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CommonLinkerContext &commonContext();
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template <typename T = CommonLinkerContext> T &context() {
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return static_cast<T &>(commonContext());
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}
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bool hasContext();
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inline llvm::StringSaver &saver() { return context().saver; }
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inline llvm::BumpPtrAllocator &bAlloc() { return context().bAlloc; }
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} // namespace lld
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#endif
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