| 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 | #include "llvm/CodeGen/CommandFlags.h" |
| 14 | |
| 15 | using namespace llvm; |
| 16 | using namespace lld; |
| 17 | |
| 18 | // Reference to the current LLD instance. This is a temporary situation, until |
| 19 | // 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 be |
| 21 | // associated with a LLD instance. Only then will LLD be free of global |
| 22 | // state. |
| 23 | static CommonLinkerContext *lctx; |
| 24 | |
| 25 | CommonLinkerContext::CommonLinkerContext() { |
| 26 | lctx = this; |
| 27 | // Fire off the static initializations in CGF's constructor. |
| 28 | codegen::RegisterCodeGenFlags CGF; |
| 29 | } |
| 30 | |
| 31 | CommonLinkerContext::~CommonLinkerContext() { |
| 32 | assert(lctx); |
| 33 | // Explicitly call the destructors since we created the objects with placement |
| 34 | // new in SpecificAlloc::create(). |
| 35 | for (auto &it : instances) |
| 36 | it.second->~SpecificAllocBase(); |
| 37 | lctx = nullptr; |
| 38 | } |
| 39 | |
| 40 | CommonLinkerContext &lld::commonContext() { |
| 41 | assert(lctx); |
| 42 | return *lctx; |
| 43 | } |
| 44 | |
| 45 | bool lld::hasContext() { return lctx != nullptr; } |
| 46 | |
| 47 | void CommonLinkerContext::destroy() { |
| 48 | if (lctx == nullptr) |
| 49 | return; |
| 50 | delete lctx; |
| 51 | } |
| 52 |