Date: Sat, 10 Aug 2002 10:19:47 -0400 From: "Kevin B. Hendricks" <kevin.hendricks@sympatico.ca> To: dev@porting.openoffice.org, Martin Blapp <mb@imp.ch> Cc: <openoffice@FreeBSD.ORG> Subject: Re: [porting-dev] Re: Crash with Test-Document in the second run. Memory allocation problem Message-ID: <200208101019.47869.kevin.hendricks@sympatico.ca> In-Reply-To: <20020810152027.Q92422-100000@levais.imp.ch> References: <20020810152027.Q92422-100000@levais.imp.ch>
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Hi Martin,
That code does atomic increment and decrement for reference counted
strings.
If you look further down the interlck.c file you will see a version that
does not use the assembler version of atomic increment and decrement and
instead uses a mutex to guard the counts.
Try recompiling sal with the "mutex" enabled version and not the assmebler
version and see if your trouble goes away.
If so, then the problem is with the assmebler for atomic increment and
decrement code under FreeBSD.
Hope this helps,
Kevin
On August 10, 2002 09:24, Martin Blapp wrote:
> What may be wrong here ?
>
> (gdb) frame 1
> #1 0x285f6889 in rtl_uString_assign (ppThis=0x86cc894, pStr=0x2b822750)
> at strtmpl.c:1370
> 1370 IMPL_RTL_AQUIRE( pStr );
> (gdb) list
> 1365
> 1366 void SAL_CALL IMPL_RTL_STRINGNAME( assign )(
> IMPL_RTL_STRINGDATA** ppThis,
> 1367
> IMPL_RTL_STRINGDATA* pStr ) 1368 {
> 1369 /* must be done at first, if pStr == *ppThis */
> 1370 IMPL_RTL_AQUIRE( pStr );
> 1371
> 1372 if ( *ppThis )
> 1373 IMPL_RTL_STRINGNAME( release )( *ppThis );
> 1374
>
> (gdb) p pStr
> $1 = (struct _rtl_uString *) 0x2b822750
>
> (gdb) p ppThis
> $2 = (struct _rtl_uString **) 0x86cc894
>
> (gdb) p pStr->refCount
> $3 = 1474660693
>
> (gdb) p pStr->length
> $4 = -326937770
>
> ^^^^^^^^^
>
> This looks very wrong to me.
>
>
> (gdb) p pStr->buffer
> $5 = {59412}
>
> (gdb) p pStr->buffer[1]
> $6 = 0
>
> If I use FORCE_SYSALLOC I end with:
>
> (gdb) frame 0
> #0 0x285e18e2 in osl_incrementInterlockedCount (pCount=0x2b822750) at
> interlck.c:81
> 81 __asm__ __volatile__ (
>
> (gdb) list
> 76
> /***********************************************************************
>******/ 77 oslInterlockedCount SAL_CALL
> osl_incrementInterlockedCount(oslInterlockedCount* pCount)
> 78 {
> 79 oslInterlockedCount nCount;
> 80
> 81 __asm__ __volatile__ (
> 82 "movl $1, %0\n\t"
> 83 "lock\n\t"
> 84 "xadd %0, %1\n\t"
> 85 "incl %0"
>
>
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