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Article #3610Re: Multiple instances of libc (ELF shared object)
From: John Hickin
Date: Thu, 07 Oct 1999 00:00
Date: Thu, 07 Oct 1999 00:00
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Even Microsoft advises against this chicanery (for those with VC6 search on LNK4096). I doubt that the Unix community would sanction this type of thing either (and I don't know if Unix environments even let you do it). Suppose, for example, that you execute: void* ptr = malloc(42); // malloc bound to libc #1 and subsequently do free( ptr ); // free bound to libc #2 You are hosed, well and truely. Similar _opportunities_, somewhat disguised, occur with tempnam/free and strdup/free. Cheers, John. Arthur Gold wrote: > > Perhaps someone can help me here. > > I have a need, within a shared object, to have multiple instances of > libc in my address space (this has to do with tracing library access),
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 11318c,47089ab1deba9b43 X-Google-Attributes: gid11318c,public X-Google-Thread: fc89c,47089ab1deba9b43 X-Google-Attributes: gidfc89c,public From: John Hickin <hickin@nortelnetworks.com> Subject: Re: Multiple instances of libc (ELF shared object) Date: 1999/10/07 Message-ID: <37FCE563.B01487E6@nortelnetworks.com> X-Deja-AN: 534006642 Content-Transfer-Encoding: 7bit References: <37FCDB67.CBB5DD0A@bga.com> X-Accept-Language: en Content-Type: text/plain; charset=us-ascii Organization: Nortel Mime-Version: 1.0 Newsgroups: comp.unix.programmer,gnu.gcc.help