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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@351636 91177308-0d34-0410-b5e6-96231b3b80d8
132 lines
4.3 KiB
C++
132 lines
4.3 KiB
C++
//===----------- JITSymbol.cpp - JITSymbol class implementation -----------===//
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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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// JITSymbol class implementation plus helper functions.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ExecutionEngine/JITSymbol.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/GlobalAlias.h"
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#include "llvm/IR/GlobalValue.h"
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#include "llvm/Object/ObjectFile.h"
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using namespace llvm;
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JITSymbolFlags llvm::JITSymbolFlags::fromGlobalValue(const GlobalValue &GV) {
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JITSymbolFlags Flags = JITSymbolFlags::None;
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if (GV.hasWeakLinkage() || GV.hasLinkOnceLinkage())
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Flags |= JITSymbolFlags::Weak;
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if (GV.hasCommonLinkage())
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Flags |= JITSymbolFlags::Common;
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if (!GV.hasLocalLinkage() && !GV.hasHiddenVisibility())
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Flags |= JITSymbolFlags::Exported;
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if (isa<Function>(GV))
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Flags |= JITSymbolFlags::Callable;
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else if (isa<GlobalAlias>(GV) &&
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isa<Function>(cast<GlobalAlias>(GV).getAliasee()))
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Flags |= JITSymbolFlags::Callable;
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return Flags;
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}
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Expected<JITSymbolFlags>
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llvm::JITSymbolFlags::fromObjectSymbol(const object::SymbolRef &Symbol) {
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JITSymbolFlags Flags = JITSymbolFlags::None;
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if (Symbol.getFlags() & object::BasicSymbolRef::SF_Weak)
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Flags |= JITSymbolFlags::Weak;
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if (Symbol.getFlags() & object::BasicSymbolRef::SF_Common)
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Flags |= JITSymbolFlags::Common;
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if (Symbol.getFlags() & object::BasicSymbolRef::SF_Exported)
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Flags |= JITSymbolFlags::Exported;
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auto SymbolType = Symbol.getType();
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if (!SymbolType)
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return SymbolType.takeError();
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if (*SymbolType & object::SymbolRef::ST_Function)
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Flags |= JITSymbolFlags::Callable;
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return Flags;
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}
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ARMJITSymbolFlags
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llvm::ARMJITSymbolFlags::fromObjectSymbol(const object::SymbolRef &Symbol) {
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ARMJITSymbolFlags Flags;
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if (Symbol.getFlags() & object::BasicSymbolRef::SF_Thumb)
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Flags |= ARMJITSymbolFlags::Thumb;
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return Flags;
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}
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/// Performs lookup by, for each symbol, first calling
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/// findSymbolInLogicalDylib and if that fails calling
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/// findSymbol.
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void LegacyJITSymbolResolver::lookup(const LookupSet &Symbols,
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OnResolvedFunction OnResolved) {
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JITSymbolResolver::LookupResult Result;
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for (auto &Symbol : Symbols) {
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std::string SymName = Symbol.str();
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if (auto Sym = findSymbolInLogicalDylib(SymName)) {
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if (auto AddrOrErr = Sym.getAddress())
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Result[Symbol] = JITEvaluatedSymbol(*AddrOrErr, Sym.getFlags());
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else {
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OnResolved(AddrOrErr.takeError());
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return;
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}
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} else if (auto Err = Sym.takeError()) {
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OnResolved(std::move(Err));
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return;
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} else {
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// findSymbolInLogicalDylib failed. Lets try findSymbol.
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if (auto Sym = findSymbol(SymName)) {
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if (auto AddrOrErr = Sym.getAddress())
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Result[Symbol] = JITEvaluatedSymbol(*AddrOrErr, Sym.getFlags());
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else {
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OnResolved(AddrOrErr.takeError());
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return;
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}
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} else if (auto Err = Sym.takeError()) {
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OnResolved(std::move(Err));
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return;
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} else {
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OnResolved(make_error<StringError>("Symbol not found: " + Symbol,
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inconvertibleErrorCode()));
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return;
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}
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}
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}
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OnResolved(std::move(Result));
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}
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/// Performs flags lookup by calling findSymbolInLogicalDylib and
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/// returning the flags value for that symbol.
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Expected<JITSymbolResolver::LookupSet>
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LegacyJITSymbolResolver::getResponsibilitySet(const LookupSet &Symbols) {
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JITSymbolResolver::LookupSet Result;
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for (auto &Symbol : Symbols) {
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std::string SymName = Symbol.str();
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if (auto Sym = findSymbolInLogicalDylib(SymName)) {
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// If there's an existing def but it is not strong, then the caller is
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// responsible for it.
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if (!Sym.getFlags().isStrong())
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Result.insert(Symbol);
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} else if (auto Err = Sym.takeError())
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return std::move(Err);
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else {
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// If there is no existing definition then the caller is responsible for
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// it.
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Result.insert(Symbol);
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}
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}
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return std::move(Result);
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}
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