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turbo c processor fault
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when I exit a function i get 'general protection exception' -' processor fault'. Function writes to file and works ok except won't exit. What does this mean please, and where should I look ? Am using Turbo C 4.5 & Windows xp. Must be overwriting memory somehow I suppose but can't see where. Have increased stack size in .def file- no use.
All suggestions welcome !!
All suggestions welcome !!
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Could you post the code you're having trouble with? Most likely you're trying to acess memory you shouldn't be, such as using a pointer that isn't pointing to what you expect it to, but it's kind of hard to guess unless you actually show us what you're trying to do.
"Technological progress is like an axe in the hands of a pathological criminal."
All my posts may be freely redistributed under the terms of the MIT license.
All my posts may be freely redistributed under the terms of the MIT license.
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Originally Posted by danijohn 
when I exit a function i get 'general protection exception' -' processor fault'. Function writes to file and works ok except won't exit. What does this mean please, and where should I look ? Am using Turbo C 4.5 & Windows xp. Must be overwriting memory somehow I suppose but can't see where. Have increased stack size in .def file- no use.
All suggestions welcome !!
http://www.daniweb.com/techtalkforums/thread50370.html
His problem is almost certainly not caused by using TC 4.5 (which though old is still somewhat servicable and can produce 32 bit Windows code) but by a bug in his code.
As people are clearly allowed to attack me but I'm not allowed to defend myself, I no longer post to this site.
Thanks for encouraging me to look for coding bug.
You are right. Eventually I traced it to repeated calls to a library routine, fcvt, which converts floats to strings. I didn't expect a problem here because I've used it elsewhere, but not with repeated calls. It seems I have to store the ouput in a static variable. Hence the return addresses getting screwed up, and the bizarre error messages.
You are right. Eventually I traced it to repeated calls to a library routine, fcvt, which converts floats to strings. I didn't expect a problem here because I've used it elsewhere, but not with repeated calls. It seems I have to store the ouput in a static variable. Hence the return addresses getting screwed up, and the bizarre error messages.
Yes you are right. It turned out to be repeated calls to a library routine, fcvt, that converts floats to strings. The small print which I missed says the ouput must be stored in a static variable. I hadn't, which accounts for the return addresses getting screwed up and the bizarre error messages.
Thanks for reply. You are probably right that I'm missing some goodies staying with an old compiler, but I don't want the cost of a new one, or learning a new environment.
In spite of the bizarre error messages, it turned out to be a simple coding error.
In spite of the bizarre error messages, it turned out to be a simple coding error.
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Originally Posted by danijohn
Thanks for reply. You are probably right that I'm missing some goodies staying with an old compiler, but I don't want the cost of a new one, or learning a new environment.
In spite of the bizarre error messages, it turned out to be a simple coding error.
cost is no excuse -- some such as Dev-C++ are free.
>> or learning a new environment
If you want to do this as a hobby that's ok. But no company uses that compiler any more.
Last edited by Ancient Dragon; Dec 28th, 2006 at 5:51 pm.
Don't PM me with questions -- you might get a nasty PM in response. If you have a question then post it in one of the forums.
and no company uses Dev-C either.
As people are clearly allowed to attack me but I'm not allowed to defend myself, I no longer post to this site.
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Depends on what exactly do you mean by a company -- a big time software gaint or a small time budding organization with no more than 10 people.
If the former, then yes, you are correct. But if the latter, then no, I have seen small time companies (like those in embedded development etc.) using free IDE's like Code::Blocks and Dev C++.
If the former, then yes, you are correct. But if the latter, then no, I have seen small time companies (like those in embedded development etc.) using free IDE's like Code::Blocks and Dev C++.
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