mirror of
https://github.com/JakeHillion/object-introspection.git
synced 2024-09-19 19:19:05 +01:00
148 lines
3.5 KiB
C++
148 lines
3.5 KiB
C++
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <exception>
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#include <iterator>
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#include <memory>
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#include <span>
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#include <sstream>
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#include <variant>
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extern "C" {
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// Declare drgn structs and only refer to them by pointers to avoid exposing
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// drgn.h.
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struct drgn_error;
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struct drgn_func_iterator;
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struct drgn_program;
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struct drgn_qualified_type;
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struct drgn_symbol;
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struct drgn_type;
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}
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namespace drgnplusplus {
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class error : public std::exception {
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public:
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struct Deleter {
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void operator()(drgn_error* err) noexcept;
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};
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error(drgn_error* err) : ptr(err){};
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operator bool() const {
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return static_cast<bool>(ptr);
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}
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const char* what() const noexcept final;
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private:
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std::unique_ptr<drgn_error, Deleter> ptr;
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};
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struct SymbolsDeleter {
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void operator()(std::span<drgn_symbol*>*) noexcept;
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};
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using symbols = std::unique_ptr<std::span<drgn_symbol*>, SymbolsDeleter>;
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class program {
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public:
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struct Deleter {
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void operator()(drgn_program* prog) noexcept;
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};
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program();
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program(drgn_program* prog) : ptr(prog){};
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symbols find_all_symbols();
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drgn_program* get() {
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return ptr.get();
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}
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private:
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std::unique_ptr<drgn_program, Deleter> ptr;
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};
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class func_iterator {
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public:
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using iterator_category = std::input_iterator_tag;
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using difference_type = std::ptrdiff_t;
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using value_type = drgn_qualified_type;
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using pointer = drgn_qualified_type*;
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using reference = drgn_qualified_type&;
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struct Deleter {
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void operator()(drgn_func_iterator* _iter) noexcept;
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};
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func_iterator(drgn_program* prog);
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func_iterator(program& prog);
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func_iterator() = default;
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func_iterator(drgn_func_iterator* _iter) : iter(_iter, Deleter()) {
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}
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reference operator*() const {
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return *current;
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}
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pointer operator->() {
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return current;
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}
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func_iterator& operator++();
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friend bool operator==(const func_iterator& a, const func_iterator& b) {
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return a.iter == b.iter;
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};
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friend bool operator!=(const func_iterator& a, const func_iterator& b) {
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return !(a == b);
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};
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func_iterator begin() {
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return ++(*this);
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}
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func_iterator end() {
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return func_iterator();
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}
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private:
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std::shared_ptr<drgn_func_iterator> iter = nullptr;
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pointer current = nullptr;
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};
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namespace symbol {
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const char* name(drgn_symbol*);
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}
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} // namespace drgnplusplus
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namespace drgn_utils {
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/*
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* These utils are not intended to be permanent. As part of the transition to
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* type-graph based CodeGen, we need to break dependencies on legacy OICodeGen
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* from other parts of OI.
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*
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* Parts of OICodeGen used by other parts of OI, but which only return drgn
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* data can be moved here.
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*/
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void getDrgnArrayElementType(drgn_type* type,
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drgn_type** outElemType,
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size_t& outNumElems);
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std::string typeToName(drgn_type* type);
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bool isSizeComplete(struct drgn_type* type);
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drgn_type* underlyingType(drgn_type* type);
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} // namespace drgn_utils
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