DllMain()和__attribute __((构造函数))执行顺序

Question

问:如果我DllMain()在共享库中编写函数,还有一个函数__attribute__((constructor)),在加载库时首先执行哪一个函数？

问:如果我__attribute__((constructor))在链接到该共享库的可执行文件中有函数,那么首先会调用什么 - 库DllMain()或可执行文件的__attribute__((constructor))函数？

Answer 1

答:按此顺序调用函数:

• DLL constructor
• DLL DllMain() (process attach)
• EXE constructor
• EXE main()
• EXE main() ends
• EXE destructor
• DLL DllMain() (process detach)
• DLL destructor

如果在运行时(LoadLibrary()/ FreeLibrary())完成链接,则按以下顺序调用函数:

• EXE constructor
• EXE main()
• EXE LoadLibrary()
• DLL constructor
• DLL DllMain() (process attach)
• EXE main() continues
• EXE FreeLibaray()
• DLL DllMain() (process detach)
• DLL destructor
• EXE main() ends
• EXE destructor

如果您忘记释放图书馆,那么订单是这样的:

• EXE constructor
• EXE main()
• EXE LoadLibrary()
• DLL constructor
• DLL DllMain() (process attach)
• EXE main() continues
• EXE main() ends
• EXE destructor
• EXE FreeLibaray() (system cleans up for you)
• DLL DllMain() (process detach)
• DLL destructor