1 //===- CommonLinkerContext.cpp --------------------------------------------===// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "lld/Common/CommonLinkerContext.h" 10 #include "lld/Common/ErrorHandler.h" 11 #include "lld/Common/Memory.h" 12 13 using namespace llvm; 14 using namespace lld; 15 16 // Reference to the current LLD instance. This is a temporary situation, until 17 // we pass this context everywhere by reference, or we make it a thread_local, 18 // as in https://reviews.llvm.org/D108850?id=370678 where each thread can be 19 // associated with a LLD instance. Only then will LLD be free of global 20 // state. 21 static CommonLinkerContext *lctx; 22 23 CommonLinkerContext::CommonLinkerContext() { lctx = this; } 24 25 CommonLinkerContext::~CommonLinkerContext() { 26 assert(lctx); 27 // Explicitly call the destructors since we created the objects with placement 28 // new in SpecificAlloc::create(). 29 for (auto &it : instances) 30 it.second->~SpecificAllocBase(); 31 lctx = nullptr; 32 } 33 34 CommonLinkerContext &lld::commonContext() { 35 assert(lctx); 36 return *lctx; 37 } 38 39 bool lld::hasContext() { return lctx != nullptr; } 40 41 void CommonLinkerContext::destroy() { 42 if (lctx == nullptr) 43 return; 44 delete lctx; 45 } 46