Re: [Valgrind-users] pls help me explaining some valgrind complaints

[John R. <jr...@bi...>]

What is the version of valgrind?  (run "valgrind --version")

What is the hardware architecture?

What is the value of MAX_FSTAB_ROWS ?

 > ==9332==  Address 0xffed476bc is on thread 1's stack
Note that the address of the Invalid write is  0xffed476bc  which is 0xf_fed4_76bc or around 63 GiB.
That is very large, so large that it is very much more than the usual default maximum size
of a thread stack, which typically is 8 MiB or 16 MiB.
Try invoking valgrind with the parameter  --main-stacksize=64000000000  which *might* work.
Otherwise: use malloc() instead of on-stack allocation for the myFSTABrows array.


>   2128 PFSTAB FstabInit(
>   2129 FSTAB_SetId id                         /* Set-Id fuer die jeweilige FSTAB        */
>   2130 )
>   2131 {
>   2132 /*-------------------------------------------------------------------------*/
>   2133     char *funk = "FstabInit()";
>   2134
>   2135     /* t_sik_fstab lesePuffer=SIK_FSTAB_EMPTY; */
>   2136     DB_ERR        dbError;
>   2137     PFSTAB fstab = NULL;
>   2138
>   2139     int anzFstabElemente = 0, anzIndikatorfelder = 0;
>   2140     int anzRows = 0;
>   2141
>   2142     /* SRP-23121: we read the complete FSTAB into memory because we
>   2143      * have to pass twice through it for the logic of indicator fields
>   2144      *
>   2145      * maybe we should malloc() the space ...
>   2146      * the number MAX_FSTAB_ROWS is the limit for one set in FSTAB
>   2147      */
>   2148     t_sik_fstab myFSTABrows[MAX_FSTAB_ROWS];
>   2149
>   2150     /* check  the SetId                            */
>   2151     if( id == FSTAB_Null || id >= FSTAB_Alle ) goto ABBRUCH;
>   2152
>   2153     /* init the buffer for read                    */
>   2154     memset( &myFSTABrows[anzRows], 0, sizeof( t_sik_fstab ));
>   2155
> 
> 
> ---------------------------
> 
> ==9332== Invalid write of size 4
> ==9332==    at 0x9DE90EF: FstabInit (BKFstab.c:2131)
> ==9332==    by 0x6BFF1E8: OpsInitDatabase (SRVServerInit.c:1299)
> ==9332==    by 0x413B48: SlnpInitDaemon (OPDaemon.c:738)
> ==9332==    by 0x413657: main (OPDaemon.c:272)
> ==9332==  Address 0xffed476bc is on thread 1's stack
> ==9332==  in frame #0, created by FstabInit (BKFstab.c:2131)
> ==9332==
> ==9332== Invalid read of size 4
> ==9332==    at 0x9DE911D: FstabInit (BKFstab.c:2151)
> ==9332==    by 0x6BFF1E8: OpsInitDatabase (SRVServerInit.c:1299)
> ==9332==    by 0x413B48: SlnpInitDaemon (OPDaemon.c:738)
> ==9332==    by 0x413657: main (OPDaemon.c:272)
> ==9332==  Address 0xffed476bc is on thread 1's stack
> ==9332==  in frame #0, created by FstabInit (BKFstab.c:2131)