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//===---------------- EPCDynamicLibrarySearchGenerator.cpp ----------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/ExecutionEngine/Orc/EPCDynamicLibrarySearchGenerator.h"
namespace llvm {
namespace orc {
Expected<std::unique_ptr<EPCDynamicLibrarySearchGenerator>>
EPCDynamicLibrarySearchGenerator::Load(ExecutionSession &ES,
const char *LibraryPath,
SymbolPredicate Allow) {
auto Handle = ES.getExecutorProcessControl().loadDylib(LibraryPath);
if (!Handle)
return Handle.takeError();
return std::make_unique<EPCDynamicLibrarySearchGenerator>(ES, *Handle,
std::move(Allow));
}
Error EPCDynamicLibrarySearchGenerator::tryToGenerate(
LookupState &LS, LookupKind K, JITDylib &JD,
JITDylibLookupFlags JDLookupFlags, const SymbolLookupSet &Symbols) {
if (Symbols.empty())
return Error::success();
SymbolLookupSet LookupSymbols;
for (auto &KV : Symbols) {
// Skip symbols that don't match the filter.
if (Allow && !Allow(KV.first))
continue;
LookupSymbols.add(KV.first, SymbolLookupFlags::WeaklyReferencedSymbol);
}
SymbolMap NewSymbols;
ExecutorProcessControl::LookupRequest Request(H, LookupSymbols);
auto Result = EPC.lookupSymbols(Request);
if (!Result)
return Result.takeError();
assert(Result->size() == 1 && "Results for more than one library returned");
assert(Result->front().size() == LookupSymbols.size() &&
"Result has incorrect number of elements");
auto ResultI = Result->front().begin();
for (auto &KV : LookupSymbols) {
if (*ResultI)
NewSymbols[KV.first] =
JITEvaluatedSymbol(*ResultI, JITSymbolFlags::Exported);
++ResultI;
}
// If there were no resolved symbols bail out.
if (NewSymbols.empty())
return Error::success();
// Define resolved symbols.
return JD.define(absoluteSymbols(std::move(NewSymbols)));
}
} // end namespace orc
} // end namespace llvm
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