52 lines · cpp
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-exception6//7//===----------------------------------------------------------------------===//8 9#include "lld/Common/CommonLinkerContext.h"10#include "lld/Common/ErrorHandler.h"11#include "lld/Common/Memory.h"12 13#include "llvm/CodeGen/CommandFlags.h"14 15using namespace llvm;16using namespace lld;17 18// Reference to the current LLD instance. This is a temporary situation, until19// we pass this context everywhere by reference, or we make it a thread_local,20// as in https://reviews.llvm.org/D108850?id=370678 where each thread can be21// associated with a LLD instance. Only then will LLD be free of global22// state.23static CommonLinkerContext *lctx;24 25CommonLinkerContext::CommonLinkerContext() {26 lctx = this;27 // Fire off the static initializations in CGF's constructor.28 codegen::RegisterCodeGenFlags CGF;29}30 31CommonLinkerContext::~CommonLinkerContext() {32 assert(lctx);33 // Explicitly call the destructors since we created the objects with placement34 // new in SpecificAlloc::create().35 for (auto &it : instances)36 it.second->~SpecificAllocBase();37 lctx = nullptr;38}39 40CommonLinkerContext &lld::commonContext() {41 assert(lctx);42 return *lctx;43}44 45bool lld::hasContext() { return lctx != nullptr; }46 47void CommonLinkerContext::destroy() {48 if (lctx == nullptr)49 return;50 delete lctx;51}52