40b4ac278e
This migrates the dylib manager lookup and related APIs to replace ExecutorAddress with ExecutorSymbolDef so that in the future we can model JITSymbolFlags for these symbols. The current change should be NFC as we are only setting the Exported symbol flag.
70 lines
2.2 KiB
C++
70 lines
2.2 KiB
C++
//===---------------- EPCDynamicLibrarySearchGenerator.cpp ----------------===//
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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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#include "llvm/ExecutionEngine/Orc/EPCDynamicLibrarySearchGenerator.h"
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namespace llvm {
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namespace orc {
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Expected<std::unique_ptr<EPCDynamicLibrarySearchGenerator>>
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EPCDynamicLibrarySearchGenerator::Load(ExecutionSession &ES,
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const char *LibraryPath,
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SymbolPredicate Allow) {
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auto Handle = ES.getExecutorProcessControl().loadDylib(LibraryPath);
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if (!Handle)
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return Handle.takeError();
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return std::make_unique<EPCDynamicLibrarySearchGenerator>(ES, *Handle,
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std::move(Allow));
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}
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Error EPCDynamicLibrarySearchGenerator::tryToGenerate(
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LookupState &LS, LookupKind K, JITDylib &JD,
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JITDylibLookupFlags JDLookupFlags, const SymbolLookupSet &Symbols) {
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if (Symbols.empty())
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return Error::success();
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SymbolLookupSet LookupSymbols;
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for (auto &KV : Symbols) {
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// Skip symbols that don't match the filter.
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if (Allow && !Allow(KV.first))
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continue;
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LookupSymbols.add(KV.first, SymbolLookupFlags::WeaklyReferencedSymbol);
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}
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SymbolMap NewSymbols;
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ExecutorProcessControl::LookupRequest Request(H, LookupSymbols);
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auto Result = EPC.lookupSymbols(Request);
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if (!Result)
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return Result.takeError();
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assert(Result->size() == 1 && "Results for more than one library returned");
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assert(Result->front().size() == LookupSymbols.size() &&
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"Result has incorrect number of elements");
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auto ResultI = Result->front().begin();
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for (auto &KV : LookupSymbols) {
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if (ResultI->getAddress())
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NewSymbols[KV.first] = *ResultI;
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++ResultI;
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}
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// If there were no resolved symbols bail out.
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if (NewSymbols.empty())
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return Error::success();
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// Define resolved symbols.
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return JD.define(absoluteSymbols(std::move(NewSymbols)));
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}
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} // end namespace orc
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} // end namespace llvm
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