Cheat Engine

ParkourPenguin · Posted: Mon Jan 25, 2016 10:24 pm Post subject: Strange Alloc Behavior

Seems like alloc($1000) doesn't actually allocate a full 4096 bytes. I doubt this is a bug on CE's part, but could someone explain this to me?

Gniarf · Posted: Tue Jan 26, 2016 12:38 am Post subject:

Hmm, I couldn't reproduce this on win 7 x64. Tried 32/64bit CE on 32 bit target, 64bit CE on itself, each time I got exactly 0x1000 bytes.

What happens if you forcefully try to write on the last 4 bytes of your buffer?

Dark Byte · Posted: Tue Jan 26, 2016 2:29 am Post subject:

all memory is allocated, it's just an disassembler issue

ParkourPenguin · Posted: Tue Jan 26, 2016 10:31 am Post subject:

Yup - I wrote a few bytes before and past that boundary in the disassembler. It didn't produce any errors whatsoever, but the bytes past that boundary still didn't show up in the disassembler. I looked at it in the memory hex view and all those bytes showed up just fine. After the few bytes I wrote there were also all 0s through derp+FFF, as it should be. Seems like a disassembler issue.

If it helps, I'm using win 7 x64. I tried the same tests as Gniarf and got this problem with all 3 tests.

Gniarf · Posted: Tue Jan 26, 2016 1:25 pm Post subject:

My bad, I was looking at the memory dump all the time. If I look in the disassembler I also got the issue.