Shoutbox

has any one heard of a C++ decompiler, if so where can I get it form?

I haven't, and I don't think you can get one either.

once you compile a program it's nearly impossible to have the source code again. The most you can have is the assembly code. Windasm and Ollybdg (<- or similar name) are 2 disassemblers. You can try them, but you don't get the C++ code, only asm.

lol that would be the worst program ever in regards to software companies, just think how many games would get hacked and trial versions modified to be full version. Yes for us it would be great, but as a whole i think its a bad idea

I don't think these are possible. No doubt some guy is working on an algorithm that can decompile a program, but so far I think its more of a pie in the sky idea. If it was possible you could reverse engineer Windows, that would be Microsoft's worst nightmare

The cause why there isn't any program of that type isn't because the code of the programs of big companies would be known, the cause is because it's very very very complex doing that kind of program because there's no a unique sollution to the problem.

I mean: you have an EXE, that's the same as if you have some ASM code. Well, from the ASM code you can't decide what the original C code was, because several C codes can give as result the same ASM code and also the C code may have been so optimized that once you have the ASM it's impossible to know the original code.

Also, suppose the program can "extract" the C code: As you know, the C language uses variables (as most of all high-level programming languages). Well, what would the name of those variables be? Note that the names of variables are only nemonics (<- dodgy spelling ). The only thing that the supposed decompiler could do is assing names like v0001, v0002, and so.. and with those names you wouldn't be able to understand the code. Similar things would happen with inline functions, global optimizations, calling conventions, etc... The code would be unreadable.

In short: there are some things in high-level languages that help the programmer in doing his/her job, and those things exists only in high-level languages. They're lost when you compile a program and they can't be restored in a decompilation. That's why, in case that kind of tool exists, it'd be useless.

In addition, different compilers will compile the same source different ways, so you'd also need to knwo the compiler used. Even across different versions of the same compiler there will be differences in the results.

quote:

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Originally posted by raceprouk
In addition, different compilers will compile the same source different ways, so you'd also need to knwo the compiler used. Even across different versions of the same compiler there will be differences in the results.

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and ever the same compiler, depending on the options used (optimize or not, small vs fast code, debug vs release mode, etc... )

So basically it's just not possible realistically.

Offtopic: Choli, are we having a competition to see who can get the most detail?

lol, well the reason i wanted it was to decompile a game lol. I wanted to get rid of the anti cheat function in it. O well.