[so] [Tema 3][Linux]Testare

[Andreea Hodea]

--- On Wed, 4/18/12, Andreea Hodea <hodea_andreea at yahoo.com> wrote:
> --- On Wed, 4/18/12, Vlad <vladb_15 at yahoo.com>
> > Da. Testul incearca sa citeasca sau sa inscrie ceva si
> zona
> > nu are protectia
> > necesara. 
> > 
> 
> Ok, de acord, observ asta din debugging. Dar, desi protectia
> e buna, da in continuare SIGSEGV de acces:
> [sig_handler(), vmsim.c:104] Page 1 
>     with fault code 2 vs SEGV_ACCERR=2 
>     when protection is 0 vs PROT_READ=1
>  [lru_in_ram(), vmsim.c:73] Mapping page 1 with prot 1 vs
> PROT_READ=1
>  [lru_in_ram(), vmsim.c:84] Page 1 mapped to frame 0
>  [sig_handler(), vmsim.c:104] Page 1 
>     with fault code 2 vs SEGV_ACCERR=2 
>     when protection is 1 vs PROT_READ=1
>  [sig_handler(), vmsim.c:104] Page 1 
>     with fault code 2 vs SEGV_ACCERR=2 
>     when protection is 2 vs PROT_READ=1
> 
> Adica, desi pagina e mapata in RAM cu protectia PROT_READ
> (testul 21 e cel care se agata), primesc in continuare fault
> de acces si fiind in RAM, inca un fault de acces inseamna
> mprotect(PROT_WRITE); de aici incolo ramane intr-o bucla
> infinita. De ce?
> 
> Multumesc, Andreea

Am rezolvat: detectam gresit pagina care provoca fault, astfel ca dadeam protectia buna unei pagini gresite.