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Lang Hames
d08c2fabb8
Wrapper function call and dispatch handler helpers are moved to ExecutionSession, and existing EPC-based tools are re-written to take an ExecutionSession argument instead. Requiring an ExecutorProcessControl instance simplifies existing EPC based utilities (which only need to take an ES now), and should encourage more utilities to use the EPC interface. It also simplifies process termination, since the session can automatically call ExecutorProcessControl::disconnect (previously this had to be done manually, and carefully ordered with the rest of JIT tear-down to work correctly).
69 lines
2.7 KiB
C++
69 lines
2.7 KiB
C++
//===------------ EPCDynamicLibrarySearchGenerator.h ------------*- C++ -*-===//
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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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// Support loading and searching of dynamic libraries in an executor process
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// via the ExecutorProcessControl class.
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_EXECUTIONENGINE_ORC_EPCDYNAMICLIBRARYSEARCHGENERATOR_H
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#define LLVM_EXECUTIONENGINE_ORC_EPCDYNAMICLIBRARYSEARCHGENERATOR_H
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#include "llvm/ADT/FunctionExtras.h"
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#include "llvm/ExecutionEngine/Orc/Core.h"
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namespace llvm {
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namespace orc {
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class ExecutorProcessControl;
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class EPCDynamicLibrarySearchGenerator : public DefinitionGenerator {
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public:
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using SymbolPredicate = unique_function<bool(const SymbolStringPtr &)>;
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/// Create a DynamicLibrarySearchGenerator that searches for symbols in the
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/// library with the given handle.
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///
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/// If the Allow predicate is given then only symbols matching the predicate
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/// will be searched for. If the predicate is not given then all symbols will
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/// be searched for.
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EPCDynamicLibrarySearchGenerator(ExecutionSession &ES,
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tpctypes::DylibHandle H,
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SymbolPredicate Allow = SymbolPredicate())
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: EPC(ES.getExecutorProcessControl()), H(H), Allow(std::move(Allow)) {}
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/// Permanently loads the library at the given path and, on success, returns
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/// a DynamicLibrarySearchGenerator that will search it for symbol definitions
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/// in the library. On failure returns the reason the library failed to load.
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static Expected<std::unique_ptr<EPCDynamicLibrarySearchGenerator>>
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Load(ExecutionSession &ES, const char *LibraryPath,
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SymbolPredicate Allow = SymbolPredicate());
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/// Creates a EPCDynamicLibrarySearchGenerator that searches for symbols in
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/// the target process.
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static Expected<std::unique_ptr<EPCDynamicLibrarySearchGenerator>>
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GetForTargetProcess(ExecutionSession &ES,
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SymbolPredicate Allow = SymbolPredicate()) {
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return Load(ES, nullptr, std::move(Allow));
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}
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Error tryToGenerate(LookupState &LS, LookupKind K, JITDylib &JD,
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JITDylibLookupFlags JDLookupFlags,
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const SymbolLookupSet &Symbols) override;
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private:
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ExecutorProcessControl &EPC;
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tpctypes::DylibHandle H;
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SymbolPredicate Allow;
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};
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} // end namespace orc
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} // end namespace llvm
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#endif // LLVM_EXECUTIONENGINE_ORC_EPCDYNAMICLIBRARYSEARCHGENERATOR_H
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