[ http://issues.apache.org/jira/browse/XERCESC-1392?page=history ]
Fred Dushin updated XERCESC-1392:
---------------------------------
Attachment: SAX2Count.SunOSv9BusError.tar
This uncompressed TAR file consists of the SAX2Count sample program, modified
to:
* Use the Well-formedness scanner
* throw an exception from the SAX handler
This program, once compiled, should readily core with a Bus Error (invalid
alignment) an Sparcv9 (64 bit) targets
> Bus Error using XMLUni::fgWFXMLScanner on 64 bit Solaris
> --------------------------------------------------------
>
> Key: XERCESC-1392
> URL: http://issues.apache.org/jira/browse/XERCESC-1392
> Project: Xerces-C++
> Type: Bug
> Components: Non-Validating Parser
> Versions: 2.6.0
> Environment: > uname -a
> SunOS fu 5.8 Generic_108528-29 sun4u sparc SUNW,Ultra-4
> > CC -V
> CC: Sun C++ 5.5 2003/03/12
> Reporter: Fred Dushin
> Attachments: SAX2Count.SunOSv9BusError.tar
>
> Readily reproducible bus error using the Well-Formedness XML Scanner
> (XMLUni::fgWFXMLScanner) on 64 bit Solaris. This does not appear to occur in
> 32 bit mode. Not able to reproduce this error with the other XML scanners.
> Used Sun C++ 5.5, and reproduced on Xerces 2.4 and 2.6, as well as with
> Forte6 (Update 2).
> The Bus Error is as the result on an address alignment error, when any
> exception is thrown from a SAX2 handler. The C++ runtime appears to be
> peeking up the stack for a frame to catch the exception, when the bus error
> occurs.
> Below is a patch file for the 2.6 SAX2Count sample program. This patch
> modifies the SAXCount driver to use the WF XML scanner, and the handler to
> always throw an exception.
> Here is a stacktrace, from dbx:
> [EMAIL PROTECTED] ([EMAIL PROTECTED]) terminated by signal BUS (invalid
> address alignment)
> 0xffffffff7e007340: exception_matches : ld [%o1 + 0x28], %o3
> (dbx) where -h
> current thread: [EMAIL PROTECTED]
> =>[1] __Cimpl::exception_matches(0xffffffff7e3f3920, 0x270022,
> 0x8000000000000000, 0x0, 0x9e8, 0x0), at 0xffffffff7e007340
> [2] __Cimpl::locate_handler_frame(0x1, 0x1000041f4, 0x0,
> 0xffffffff7ef617b8, 0xffffffff7f167d08, 0xffffffff7e10d580), at
> 0xffffffff7e005cf4
> [3] __Crun::ex_throw(0xffffffff7e10d580, 0xffffffff7e3f3920, 0x0, 0x10342c,
> 0xffffffff7e24ad68, 0x100107ae0), at 0xffffffff7e005e28
> [4] SAX2CountHandlers::startElement(0xffffffff7fffd698, 0x1, 0x103970,
> 0xffffffff7eebd820, 0x0, 0x100107ae0), at 0x1000041e4
> [5] xercesc_2_6::SAX2XMLReaderImpl::startElement(0x1001309a8, 0x100131fc8,
> 0x1, 0x10012f950, 0x100004f08, 0x0), at 0xffffffff7ee3328c
> [6] xercesc_2_6::WFXMLScanner::scanStartTagNS(0x100137e38, 0x0, 0x0,
> 0x100131fc8, 0x0, 0x1), at 0xffffffff7ee9c6a4
> [7] xercesc_2_6::WFXMLScanner::scanContent(0x100137e38, 0x1, 0x1, 0x0,
> 0xe7, 0xffffffff7fffcc80), at 0xffffffff7ee9ae1c
> [8] xercesc_2_6::WFXMLScanner::scanDocument(0x100137e38, 0x1, 0x0,
> 0xffffffff7f15f0e0, 0x0, 0x10010b370), at 0xffffffff7ee99b58
> [9] xercesc_2_6::XMLScanner::scanDocument(0x100137e38, 0xffffffff7ee99ad8,
> 0x10010b370, 0x226b70, 0xffffffff7f167e38, 0x10010c718), at 0xffffffff7eebae20
> [10] xercesc_2_6::XMLScanner::scanDocument(0x100137e38, 0xffffffff7fffdb5a,
> 0x19, 0x1000038a8, 0x3, 0x100109840), at 0xffffffff7eebb1a4
> [11] xercesc_2_6::SAX2XMLReaderImpl::parse(0x1001309a8, 0x0, 0x1050c5dbaf,
> 0xffffffffffffffc0, 0xfffffffffffffff8, 0x1093122440), at 0xffffffff7ee32694
> [12] main(0x102f9fb79c8, 0x3e8, 0xffffffff7fffd180, 0xffffffff7fffd568,
> 0xffffffff7fffd698, 0x100107ae0), at 0x1000038a8
> Patch:
> diff -r -c SAX2Count.ORIG/SAX2Count.cpp SAX2Count/SAX2Count.cpp
> *** SAX2Count.ORIG/SAX2Count.cpp Thu Mar 31 13:29:32 2005
> --- SAX2Count/SAX2Count.cpp Thu Mar 31 13:29:37 2005
> ***************
> *** 302,307 ****
> --- 302,311 ----
> parser->setFeature(XMLUni::fgXercesSchemaFullChecking,
> schemaFullChecking);
> parser->setFeature(XMLUni::fgXercesIdentityConstraintChecking,
> identityConstraintChecking);
> parser->setFeature(XMLUni::fgSAX2CoreNameSpacePrefixes,
> namespacePrefixes);
> + parser->setProperty(
> + XMLUni::fgXercesScannerName,
> + const_cast<unsigned short*const>(XMLUni::fgWFXMLScanner)
> + );
>
> if (valScheme == SAX2XMLReader::Val_Auto)
> {
> diff -r -c SAX2Count.ORIG/SAX2CountHandlers.cpp
> SAX2Count/SAX2CountHandlers.cpp
> *** SAX2Count.ORIG/SAX2CountHandlers.cpp Thu Mar 31 13:29:33 2005
> --- SAX2Count/SAX2CountHandlers.cpp Thu Mar 31 13:29:41 2005
> ***************
> *** 74,79 ****
> --- 74,80 ----
> {
> fElementCount++;
> fAttrCount += attrs.getLength();
> + throw std::logic_error( "crash me!" );
> }
>
> void SAX2CountHandlers::characters( const XMLCh* const chars
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