130 lines
3.7 KiB
C++
130 lines
3.7 KiB
C++
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#ifndef STUBEXT_H
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#define STUBEXT_H
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/*
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* Author: Zhang Yu <clauszy@163.com>
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* Maintainer: Zhang Yu <clauszy@163.com>
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*
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* MIT License
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*
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* Copyright (c) 2020 Zhang Yu
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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//需修改Stub的私用成员函数和成员变量为保护类型
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#include "stub.h"
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#include "stub-shadow.h"
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#ifdef DEBUG_STUB_INVOKE
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// use to make sure the stub function is invoked.
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# define __DBG_STUB_INVOKE__ printf("stub at %s:%d is invoked.\n", __FILE__, __LINE__);
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#else
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# define __DBG_STUB_INVOKE__
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#endif
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#define VADDR(CLASS_NAME, MEMBER_NAME) (typename stub_ext::VFLocator<decltype(&CLASS_NAME::MEMBER_NAME)>::Func)(&CLASS_NAME::MEMBER_NAME)
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namespace stub_ext {
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class StubExt : public Stub
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{
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public:
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StubExt()
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: Stub() { }
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template<typename T, class Lamda>
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bool set_lamda(T addr, Lamda lamda)
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{
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char *fn = addrof(addr);
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if (m_result.find(fn) != m_result.end())
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reset(addr);
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Wrapper *wrapper = nullptr;
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auto addr_stub = depictShadow(&wrapper, addr, lamda);
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if (set(addr, addr_stub)) {
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m_wrappers.insert(std::make_pair(fn, wrapper));
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return true;
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} else {
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freeWrapper(wrapper);
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}
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return false;
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}
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template<typename T>
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void reset(T addr)
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{
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Stub::reset(addr);
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char *fn = addrof(addr);
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auto iter = m_wrappers.find(fn);
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if (iter != m_wrappers.end()) {
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freeWrapper(iter->second);
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m_wrappers.erase(iter);
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}
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}
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~StubExt()
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{
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clear();
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}
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void clear() override
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{
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Stub::clear();
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for (auto iter = m_wrappers.begin(); iter != m_wrappers.end(); ++iter) {
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freeWrapper(iter->second);
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}
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m_wrappers.clear();
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}
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template<class T>
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static void *get_ctor_addr(bool start = true)
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{
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// the start vairable must be true, or the compiler will optimize out.
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if (start) goto Start;
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Call_Constructor:
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// This line of code will not be executed.
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// The purpose of the code is to allow the compiler to generate the assembly code that calls the constructor.
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T();
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Start:
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// The address of the line of code T() obtained by assembly
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char *p = (char *)&&Call_Constructor; // https://gcc.gnu.org/onlinedocs/gcc/Labels-as-Values.html
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// CALL rel32
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void *ret = 0;
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char pos;
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char call = 0xe8;
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do {
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pos = *p;
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if (pos == call) {
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ret = p + 5 + (*(int *)(p + 1));
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}
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} while (!ret && (++p));
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return ret;
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}
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protected:
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std::map<char *, Wrapper *> m_wrappers;
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};
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}
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#endif // STUBEXT_H
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