Re: [xml] Anyone else having problems with Sun Workshop?

[David Frascone <dave frascone com>]

I just tried RTLD_LOCAL or'ed with both RTLD_NOW and RTLD_LAZY.  Both gave me
the same problem.

Basically, it was my fault.  I was using some of the same symbol names in
my locally scoped variables as in the library.  I didn't think it would matter,
but it did.  

(GCC worked, but I can easily see how the problem happened).

The problem was with the doValidityCheckingDefaultValue.  I wanted to set
it to one.  So, first, I made an integer pointer, and pointed it to
the library's symbol:

xmlDoValidityCheckingDefaultValue = (int *)
                 dlsym(handle, "xmlDoValidityCheckingDefaultValue");
*xmlDoValidityCheckingDefaultValue=1; /* and, set it to one */

This worked fine . . . . under gcc.

Under Solaris, since xmlDoValidityChecking was a global in both scopes, when
libxml examined the variable, sometimes it got it's own global (set to one),
and sometimes it got my pointer (set to an address).

Personally, I solved the problem by putting all of my function/variable
pointers into a structure.  The code is cleaner this way anyway.

Anyway, live and learn,


Dave


On Wed, Jun 06, 2001 at 02:46:55PM +0100, Gary Pennington wrote:
> I'm not an expert in this area, but a quick perusal of the man page for dlopen() indicates that you should 
> get
> the result you want if you or RTLD_LOCAL into the mode parameters.
>
> In other words, I don't think it's the Solaris linker that's broken, but your code may be.
>
> Gary
>
> David Frascone wrote:
>
> > I found it.  It was solaris' BRAIN DEAD linker.
> >
> > Basically, I'm doing a dlopen on the library, and mapping the internal
> > functions that I call to local function pointers.  But, for some reason,
> > the Solaris linker doesn't like me to use the same names for my pointers
> > as the ones used in the library.
> >
> > Live and learn.
> >
> > libxml is working for me now.
> >
> > -Dave
> >
> > On Tue, Jun 05, 2001 at 01:57:41PM -0500, David Frascone wrote:
> > > On Tue, Jun 05, 2001 at 02:54:42PM -0400, Daniel Veillard wrote:
> > > > On Tue, Jun 05, 2001 at 01:49:00PM -0500, David Frascone wrote:
> > > > > program terminated by signal SEGV (no mapping at the fault address)
> > > > > Current function is startElement
> > > > >  1067     ctxt->valid &= xmlValidateRoot(&ctxt->vctxt, ctxt->myDoc);
> > > > > (/ws/on81-tools/SUNWspro/SC6.1/bin/../WS6U1/bin/sparcv9/dbx) where
> > > > >   [1] 0x22da0(0x35e8c, 0x349a0, 0x0, 0x0, 0x0, 0x0), at 0x22d9f
> > > > > =>[2] startElement(ctx = 0x35e20, fullname = 0x22f78 "dictionary", atts = (nil)), line 1067 in 
> > > > > "SAX.c"
> > > >
> > > >   Nothing abnormal to me. If it crashes there, this would mean
> > > > ctxt has been corrupted, no really I don't have a clue. Someone
> > > > will have to debug this.
> > >
> > > Easy enough:
> > >
> > > (/ws/on81-tools/SUNWspro/SC6.1/bin/../WS6U1/bin/sparcv9/dbx) print *ctx
> > > *ctx = (void)
> > > (/ws/on81-tools/SUNWspro/SC6.1/bin/../WS6U1/bin/sparcv9/dbx) print ctx
> > > ctx = 0x35e20
> > > (/ws/on81-tools/SUNWspro/SC6.1/bin/../WS6U1/bin/sparcv9/dbx) frame 3
> > > Current function is xmlParseStartTag
> > >  6141           ctxt->sax->startElement(ctxt->userData, name, atts);
> > > (/ws/on81-tools/SUNWspro/SC6.1/bin/../WS6U1/bin/sparcv9/dbx) print *ctxt
> > > *ctxt = {
> > >     sax               = 0x35f38
> > >     userData          = 0x35e20
> > >     myDoc             = 0x349a0
> > >     wellFormed        = 1
> > >     replaceEntities   = 0
> > >     version           = 0x35b40 "1.0"
> > >     encoding          = (nil)
> > >     standalone        = -1
> > >     html              = 0
> > >     input             = 0x36040
> > >     inputNr           = 1
> > >     inputMax          = 5
> > >     inputTab          = 0x27538
> > >     node              = 0x34ba0
> > >     nodeNr            = 1
> > >     nodeMax           = 10
> > >     nodeTab           = 0x35fb0
> > >     record_info       = 0
> > >     node_seq          = {
> > >         maximum = 0
> > >         length  = 0
> > >         buffer  = (nil)
> > >     }
> > >     errNo             = 0
> > >     hasExternalSubset = 1
> > >     hasPErefs         = 0
> > >     external          = 1
> > >     valid             = 1
> > >     validate          = -14480968
> > >     vctxt             = {
> > >         userData  = 0x35e20
> > >         error     = 0xff13eb50 = &xmlParserValidityError()
> > >         warning   = 0xff13ed00 = &xmlParserValidityWarning()
> > >         node      = (nil)
> > >         nodeNr    = 0
> > >         nodeMax   = 0
> > >         nodeTab   = (nil)
> > >         finishDtd = 0
> > >         doc       = 0x349a0
> > >         valid     = 1
> > >         vstate    = (nil)
> > >         vstateNr  = 0
> > >         vstateMax = 0
> > >         vstateTab = (nil)
> > >     }
> > >     instate           = XML_PARSER_CONTENT
> > >     token             = 0
> > >     directory         = 0x27578 "/home/dfrascon/work/xml"
> > >     name              = (nil)
> > >     nameNr            = 0
> > >     nameMax           = 10
> > >     nameTab           = 0x35fe0
> > >     nbChars           = 540
> > >     checkIndex        = 0
> > >     keepBlanks        = 0
> > >     disableSAX        = 0
> > >     inSubset          = 0
> > >     intSubName        = 0x22f00 "dictionary"
> > >     extSubURI         = 0x349f8 "avp.dtd"
> > >     extSubSystem      = (nil)
> > >     space             = 0x36014
> > >     spaceNr           = 2
> > >     spaceMax          = 10
> > >     spaceTab          = 0x36010
> > >     depth             = 0
> > >     entity            = 0x34be8
> > >     charset           = 1
> > >     nodelen           = 0
> > >     nodemem           = -1
> > >     pedantic          = 0
> > >     _private          = (nil)
> > >     loadsubset        = 0
> > > }
> > > (/ws/on81-tools/SUNWspro/SC6.1/bin/../WS6U1/bin/sparcv9/dbx)
> > >
> > >
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