Re: [Full-Disclosure] gcc: Internal compiler error: program cc1 got fatal signal 11

[<mr.pink@hushmail.com>]

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On Fri, 09 Jan 2004 15:59:44 -0800 Dale Harris <rodmur@maybe.org> wrote:

>
>Well, honestly... is this interesting if seg. faults when you execute
>it?  Or am I just missing something?  You're accessing an array
>that
>hasn't been defined, that is a big "DUH!" in my book.  It is interesting
>if it kills the compiler while trying to compile it, when it should
>be issuing a syntax error,

    It's legal, although undefined, C. However, when appropriate, the
compiler is allowed to issue a warning about accessing out of bounds
data. This assumes the array has been statically or automatically allocated.

    The reason the compiler is crashing when parsing the expression is
most likely a missing check determining whether (string literal + index)
lies within the symbol table. One thing I have noticed in a gcc version
that didn't crash, was that significantly large values for the index
caused code to be generated that calculates the resulting 'char' value
at runtime.

0x804831c <main+16>:    mov    $0xcafebabe,%eax
0x8048321 <main+21>:    mov    0x80483f4(%eax),%al

I would imagine gcc versions that crash do the above calculation at compile
time.

>not if the binary is executed.  Hell, I have
>programs seg.  fault all the time, no surprise there.
>
>
>Dale
>
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