Getting The Size of a C++ Function

by

Wow, I use function size counting all the time and it has lots and lots of uses. Is it reliable? No way. Is it standard c++? No way. But that’s why you need to check it in the disassembler to make sure it worked, every time that you release a new version. Compiler flags can mess up the ordering.

static void funcIwantToCount()
{
   // do stuff
}
static void funcToDelimitMyOtherFunc()
{
   __asm _emit 0xCC
   __asm _emit 0xCC
   __asm _emit 0xCC
   __asm _emit 0xCC
}

int getlength( void *funcaddress )
{
   int length = 0;
   for(length = 0; *((UINT32 *)(&((unsigned char *)funcaddress)[length])) != 0xCCCCCCCC; ++length);
   return length;
}

It seems to work better with static functions. Global optimizations can kill it.

P.S. I hate people, asking why you want to do this and it’s impossible, etc. Stop asking these questions, please. Makes you sound stupid. Programmers are often asked to do non-standard things, because new products almost always push the limits of what’s availble. If they don’t, your product is probably a rehash of what’s already been done. Boring!!!

More Related Contents:

  1. What’s the best free C++ profiler for Windows? [closed]
  2. Is TCHAR still relevant?
  3. How to get main window handle from process id?
  4. Deploying Qt 5 App on Windows
  5. Is there a limit on number of open files in Windows
  6. How to open an std::fstream (ofstream or ifstream) with a unicode filename?
  7. OpenCV with Network Cameras
  8. Qt 5.1.1: Application failed to start because platform plugin “windows” is missing
  9. Start Windows Service From Application without Admin right(c++)
  10. Create a directory if it doesn’t exist
  11. How do I input variables using cin without creating a new line?
  12. C++ compiling on Windows and Linux: ifdef switch [duplicate]
  13. Can I use CreateFile, but force the handle into a std::ofstream?
  14. What is the meaning and usage of __stdcall?
  15. How to properly uninitialize OpenSSL
  16. How should I use FormatMessage() properly in C++?
  17. Creating, opening and printing a word file from C++
  18. track C++ memory allocations
  19. How do I tell CMake to use Clang on Windows?
  20. What std::locale names are available on common windows compilers?
  21. Converting YUV into BGR or RGB in OpenCV
  22. Why does Windows 10 start extra threads in my program?
  23. Check the file-size without opening file in C++?
  24. How do I clear the console in BOTH Windows and Linux using C++
  25. Windows C/C++ Crypto API Examples and tips
  26. OpenSSL::SSL_library_init() memory leak
  27. System() calls in C++ and their roles in programming
  28. Possible problems with NOMINMAX on Visual C++
  29. generates same number in Linux, but not in Windows
  30. How can I find the size of all files located inside a folder?

Leave a Comment