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However, unloading a DLL can lead to program crashes if objects in the main application refer to memory allocated within the DLL. For example, if a DLL introduces a new class and the DLL is closed, further operations on instances of that class from the main application will likely cause a memory access violation.
ldd (List Dynamic Dependencies) is a *nix utility that prints the shared libraries required by each program or shared library specified on the command line. [1] It was developed by Roland McGrath and Ulrich Drepper. [2] If some shared library is missing for any program, that program won't come up.
A dynamic-link library (DLL) is a shared library in the Microsoft Windows or OS/2 operating system. A DLL can contain executable code (functions), data, and resources. A DLL file often has file extension.dll even though this is not required. The extension is sometimes used to describe the content of the file.
Some security extensions to Linux/x86 use rebasing to force the use of code addresses below 0x00ffffff in order to introduce a 0x00 byte into all code pointers; [citation needed] This eliminates a certain class of buffer overflow security problems related to improper checking of null-terminated strings, common in the C programming language.
Developers can add such a program using the /STUB switch with Microsoft's linker, effectively creating a fat binary. [5] Over time, the PE format has grown with the Windows platform. Notable extensions include the .NET PE format for managed code, PE32+ for 64-bit address space support, and a specialized version for Windows CE.
In most Unix-like systems, most of the machine code that makes up the dynamic linker is actually an external executable that the operating system kernel loads and executes first in a process address space newly constructed as a result of calling exec or posix_spawn functions. At link time, the path of the dynamic linker that should be used is ...
windows.h is a source code header file that Microsoft provides for the development of programs that access the Windows API (WinAPI) via C language syntax. It declares the WinAPI functions, associated data types and common macros. Access to WinAPI can be enabled for a C or C++ program by including it into a source file: #include <windows.h>
MSVCIRT.DLL – Microsoft C++ Library, contains the deprecated C++ classes from <iostream.h> (note the file extension) for MS C 9 and 10 (MSVC 2.x, 4.x) (Back then, the draft C++ Standard Library was integrated within MSVCRT.DLL. It was split up with the release of Visual C++ 5.0)