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93 lines
2.9 KiB
C++
93 lines
2.9 KiB
C++
//===--- CMemoryReader.h - MemoryReader wrapper for C impls -----*- C++ -*-===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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//
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// This file declares an implementation of MemoryReader that wraps the
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// C interface provided by SwiftRemoteMirror.
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//
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//===----------------------------------------------------------------------===//
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#ifndef SWIFT_REMOTE_CMEMORYREADER_H
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#define SWIFT_REMOTE_CMEMORYREADER_H
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#include "swift/SwiftRemoteMirror/MemoryReaderInterface.h"
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#include "swift/Remote/MemoryReader.h"
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namespace swift {
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namespace remote {
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/// An implementation of MemoryReader which wraps the C interface offered
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/// by SwiftRemoteMirror.
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class CMemoryReader final : public MemoryReader {
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MemoryReaderImpl Impl;
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public:
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CMemoryReader(MemoryReaderImpl Impl) : Impl(Impl) {
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assert(this->Impl.getPointerSize && "No getPointerSize implementation");
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assert(this->Impl.getStringLength && "No stringLength implementation");
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assert(this->Impl.readBytes && "No readBytes implementation");
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assert(this->Impl.getPointerSize(this->Impl.reader_context) != 0 &&
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"Invalid target pointer size");
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}
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uint8_t getPointerSize() override {
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return Impl.getPointerSize(Impl.reader_context);
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}
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uint8_t getSizeSize() override {
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return Impl.getSizeSize(Impl.reader_context);
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}
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RemoteAddress getSymbolAddress(const std::string &name) override {
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auto addressData = Impl.getSymbolAddress(Impl.reader_context,
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name.c_str(), name.size());
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return RemoteAddress(addressData);
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}
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uint64_t getStringLength(RemoteAddress address) {
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return Impl.getStringLength(Impl.reader_context,
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address.getAddressData());
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}
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bool readString(RemoteAddress address, std::string &dest) override {
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auto length = getStringLength(address);
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if (!length)
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return false;
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const void *ptr;
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std::function<void()> freeFunc;
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std::tie(ptr, freeFunc) = readBytes(address, length);
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if (ptr != nullptr) {
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dest = std::string(reinterpret_cast<const char *>(ptr), length);
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freeFunc();
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return true;
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} else {
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return false;
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}
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}
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std::tuple<const void *, std::function<void()>>
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readBytes(RemoteAddress address, uint64_t size) override {
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FreeBytesFunction freeFunc;
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void *freeContext;
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auto ptr = Impl.readBytes(Impl.reader_context, address.getAddressData(), size,
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&freeFunc, &freeContext);
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auto freeLambda = [=]{ freeFunc(ptr, freeContext); };
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return std::make_tuple(ptr, freeLambda);
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}
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};
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}
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}
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#endif
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