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65f929415a
The new method name/behavior more closely models the way it was being used. It also fixes an assertion that can occur when using the new ORC Core APIs, where flags alone don't necessarily provide enough context to decide whether the caller is responsible for materializing a given symbol (which was always the reason this API existed). The default implementation of getResponsibilitySet uses lookupFlags to determine responsibility as before, so existing JITSymbolResolvers should continue to work. llvm-svn: 340874
119 lines
3.9 KiB
C++
119 lines
3.9 KiB
C++
//===----------- JITSymbol.cpp - JITSymbol class implementation -----------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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/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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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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Expected<JITSymbolResolver::LookupResult>
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LegacyJITSymbolResolver::lookup(const LookupSet &Symbols) {
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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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return AddrOrErr.takeError();
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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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// 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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return AddrOrErr.takeError();
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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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return make_error<StringError>("Symbol not found: " + Symbol,
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inconvertibleErrorCode());
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}
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}
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return 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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