Bug 6092 – REGRESSION: dom/xhtml/level2/html//HTMLInputElement01.xhtml crashes

• Component: DOM
• Status: RESOLVED FIXED

[Eric Seidel (no email)]

REGRESSSION: dom/xhtml/level2/html//HTMLInputElement01.xhtml crashes

Date/Time:      2005-12-15 01:27:40.765 -0800
OS Version:     10.4.4

Command: DumpRenderTree
Path:    /Volumes/Stuff/Projects/build/Development/DumpRenderTree
Parent:  perl [19144]

Version: ??? (???)

PID:    19196
Thread: 0

Exception:  EXC_BAD_ACCESS (0x0001)
Codes:      KERN_PROTECTION_FAILURE (0x0002) at 0x0000000c

Thread 0 Crashed:
0   com.apple.WebCore        	0x013f0888 DOM::DocPtr<DOM::DocumentImpl>::get() const + 20 
(DocPtr.h:47)
1   com.apple.WebCore        	0x013f0940 DOM::NodeImpl::getDocument() const + 40 
(dom_nodeimpl.h:264)
2   com.apple.WebCore        	0x01204800 DOM::ElementImpl::dispatchAttrAdditionEvent
(DOM::AttributeImpl*) + 40 (dom_elementimpl.cpp:611)
3   com.apple.WebCore        	0x012055f8 DOM::NamedAttrMapImpl::addAttribute
(DOM::AttributeImpl*) + 384 (dom_elementimpl.cpp:1042)
4   com.apple.WebCore        	0x01208c5c DOM::ElementImpl::setAttribute(DOM::QualifiedName 
const&, DOM::DOMStringImpl*, int&) + 456 (dom_elementimpl.cpp:398)
5   com.apple.WebCore        	0x01209964 DOM::ElementImpl::setAttributeNS(DOM::DOMString 
const&, DOM::DOMString const&, DOM::DOMString const&, int&) + 388 (dom_elementimpl.cpp:760)
6   com.apple.WebCore        	0x012312dc khtml::handleElementAttributes(DOM::ElementImpl*, 
unsigned char const**, int, int&) + 776 (xml_tokenizer.cpp:307)
7   com.apple.WebCore        	0x012317c8 khtml::XMLTokenizer::startElementNs(unsigned char 
const*, unsigned char const*, unsigned char const*, int, unsigned char const**, int, int, unsigned char 
const**) + 972 (xml_tokenizer.cpp:342)
8   com.apple.WebCore        	0x01231bfc khtml::startElementNsHandler(void*, unsigned char const*, 
unsigned char const*, unsigned char const*, int, unsigned char const**, int, int, unsigned char const**) 
+ 108 (xml_tokenizer.cpp:547)
9   libxml2.2.dylib          	0x92c26480 xmlParseStartTag + 8228
10  libxml2.2.dylib          	0x92c282ec xmlParseDocument + 3368
11  libxml2.2.dylib          	0x92c0cc0c xmlParseChunk + 424
12  com.apple.WebCore        	0x0122e444 khtml::parseQString(_xmlParserCtxt*, QString const&) + 
80 (xml_tokenizer.cpp:189)
13  com.apple.WebCore        	0x0122fccc khtml::XMLTokenizer::finish() + 344 (xml_tokenizer.cpp:
646)
14  com.apple.WebCore        	0x011f3a7c DOM::DocumentImpl::finishParsing() + 84 
(dom_docimpl.cpp:1562)
15  com.apple.WebCore        	0x010a453c KHTMLPart::endIfNotLoading() + 176 (khtml_part.cpp:
1014)
16  com.apple.WebCore        	0x010a4590 KHTMLPart::end() + 52 (khtml_part.cpp:1003)
17  com.apple.WebCore        	0x01088d54 -[WebCoreBridge end] + 72 (WebCoreBridge.mm:524)
18  com.apple.WebKit         	0x00256a5c -[WebDataSource(WebPrivate) _finishedLoading] + 204 
(WebDataSource.m:784)
19  com.apple.WebKit         	0x00293ef8 -[WebMainResourceLoader didFinishLoading] + 560 
(WebMainResourceLoader.m:395)
20  com.apple.WebKit         	0x00251274 -[WebLoader connectionDidFinishLoading:] + 184 
(WebLoader.m:663)
21  com.apple.Foundation     	0x92917cdc -[NSURLConnection(NSURLConnectionInternal) 
_sendDidFinishLoadingCallback] + 188
22  com.apple.Foundation     	0x92915f48 -[NSURLConnection(NSURLConnectionInternal) 
_sendCallbacks] + 556
23  com.apple.Foundation     	0x92915ca0 _sendCallbacks + 156
24  com.apple.CoreFoundation 	0x9075da68 __CFRunLoopDoSources0 + 384
25  com.apple.CoreFoundation 	0x9075cf98 __CFRunLoopRun + 452
26  com.apple.CoreFoundation 	0x9075ca18 CFRunLoopRunSpecific + 268
27  com.apple.Foundation     	0x928f4664 -[NSRunLoop runMode:beforeDate:] + 172
28  DumpRenderTree           	0x00005f58 dumpRenderTree + 740 (DumpRenderTree.m:572)
29  DumpRenderTree           	0x00003924 main + 2408 (DumpRenderTree.m:176)
30  DumpRenderTree           	0x00002814 _start + 340 (crt.c:272)
31  DumpRenderTree           	0x000026bc start + 60

Thread 1:
0   libSystem.B.dylib        	0x9000b208 mach_msg_trap + 8
1   libSystem.B.dylib        	0x9000b15c mach_msg + 60
2   com.apple.CoreFoundation 	0x9075d114 __CFRunLoopRun + 832
3   com.apple.CoreFoundation 	0x9075ca18 CFRunLoopRunSpecific + 268
4   com.apple.Foundation     	0x9290cb9c +[NSURLConnection(NSURLConnectionInternal) 
_resourceLoadLoop:] + 264
5   com.apple.Foundation     	0x928e56d4 forkThreadForFunction + 108
6   libSystem.B.dylib        	0x9002b200 _pthread_body + 96

Thread 2:
0   libSystem.B.dylib        	0x9000b208 mach_msg_trap + 8
1   libSystem.B.dylib        	0x9000b15c mach_msg + 60
2   com.apple.CoreFoundation 	0x9075d114 __CFRunLoopRun + 832
3   com.apple.CoreFoundation 	0x9075ca18 CFRunLoopRunSpecific + 268
4   com.apple.Foundation     	0x9290dcdc +[NSURLCache _diskCacheSyncLoop:] + 152
5   com.apple.Foundation     	0x928e56d4 forkThreadForFunction + 108
6   libSystem.B.dylib        	0x9002b200 _pthread_body + 96

Thread 3:
0   libSystem.B.dylib        	0x9000b208 mach_msg_trap + 8
1   libSystem.B.dylib        	0x9000b15c mach_msg + 60
2   com.apple.CoreFoundation 	0x9075d114 __CFRunLoopRun + 832
3   com.apple.CoreFoundation 	0x9075ca18 CFRunLoopRunSpecific + 268
4   com.apple.Foundation     	0x928f4664 -[NSRunLoop runMode:beforeDate:] + 172
5   com.apple.Foundation     	0x928f459c -[NSRunLoop run] + 76
6   com.apple.WebKit         	0x002c41e8 +[WebFileDatabase _syncLoop:] + 420 
(WebFileDatabase.m:291)
7   com.apple.Foundation     	0x928e56d4 forkThreadForFunction + 108
8   libSystem.B.dylib        	0x9002b200 _pthread_body + 96

Thread 4:
0   libSystem.B.dylib        	0x9001f20c select + 12
1   com.apple.CoreFoundation 	0x9076f9a8 __CFSocketManager + 472
2   libSystem.B.dylib        	0x9002b200 _pthread_body + 96

Thread 0 crashed with PPC Thread State 64:
  srr0: 0x00000000013f0888 srr1: 0x000000000000d030                        vrsave: 
0x0000000000000000
    cr: 0x22000222          xer: 0x0000000000000004   lr: 0x00000000013f0940  ctr: 
0x0000000000000007
    r0: 0x000000000000000c   r1: 0x00000000bfffe1a0   r2: 0x000000000000000c   r3: 
0x000000000000000c
    r4: 0x000000000f86e590   r5: 0x000000000ca02600   r6: 0x00000000ffffffff   r7: 
0x0000000000000001
    r8: 0x000000000f86e427   r9: 0x0000000000000070  r10: 0x0000000000000001  r11: 
0x0000000000000dc8
   r12: 0x0000000090006700  r13: 0x00000000bfffe7d0  r14: 0x00000000bfffe7cc  r15: 
0x00000000bfffe7d4
   r16: 0x0000000000000000  r17: 0x0000000000000000  r18: 0x0000000000000037  r19: 
0x0000000000000005
   r20: 0x000000000cb6ccf2  r21: 0x0000000000000000  r22: 0x0000000000000421  r23: 
0x0000000000000019
   r24: 0x000000000cbf6a00  r25: 0x000000000f6c09e0  r26: 0x0000000000000019  r27: 
0x000000000f49aa80
   r28: 0x000000000cb6cc48  r29: 0x000000000f86e230  r30: 0x00000000bfffe1a0  r31: 
0x0000000001208aac

Binary Images Description:
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DumpRenderTree
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WebCore.framework/Versions/A/WebCore
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Model: PowerBook6,4, BootROM 4.8.3f1, 1 processors, PowerPC G4  (1.1), 1.33 GHz, 1.25 GB
Graphics: GeForce FX Go5200, GeForce FX Go5200, AGP, 64 MB
Memory Module: DIMM0/BUILT-IN, 256 MB, built-in, built-in
Memory Module: DIMM1/J31, 1 GB, DDR SDRAM, PC2700U-25330
AirPort: AirPort Extreme, 404.2 (3.90.34.0.p16)
Bluetooth: Version 1.7.0f10, 2 service, 0 devices, 1 incoming serial ports
Network Service: AirPort, AirPort, en1
Network Service: VPN (L2TP), PPP (L2TP), ppp0
Parallel ATA Device: MATSHITADVD-R   UJ-825, 
Parallel ATA Device: TOSHIBA MK6025GAS, 55.89 GB
USB Device: Bluetooth HCI, , Up to 12 Mb/sec, 500 mA

[Darin Adler]

This is a reference counting problem in the XML tokenizer -- it doesn't do the same kinds of "reference 
current node" things that the HTML tokenizer does. Working on a patch.

[Darin Adler]

Created attachment 5093 [details]
keep current node ref'd in the XML tokenizer/parser as in the HTML parser

[Eric Seidel (no email)]

Comment on attachment 5093 [details]
keep current node ref'd in the XML tokenizer/parser as in the HTML parser

The spacing on
setCurrentNode
looks odd.

Read through the whole thing, but I'm just waking up, so I want to read through
it all again before I r+ it.

[Eric Seidel (no email)]

Comment on attachment 5093 [details]
keep current node ref'd in the XML tokenizer/parser as in the HTML parser

Reading through it a second time for real:

~XMLTokenizer() has strange spacing.
setCurrentNode() (already mentioned) has strange spacing.

If startElementImpl fails to add a node, it can just call stopParsing() or? 
That woudl get rid of the need for your FIXMEs

     while (m_currentNode->implicitNode())
-	 m_currentNode = m_currentNode->parentNode();

could be re-written to use a local, and avoid the (admittedly minimal) refcount
thrash.

I'm not sure why it's not OK to clear the parent node in this case:
+    if (NodeImpl* par = m_currentNode->parentNode())
+	 setCurrentNode(par);

That code will never be reached (parsing would have aborted by now), but even
so, clearing m_currnetNode should be OK...

To solve your second FIXME in exitText, I think it's OK to stop parsing in
enterText in the failure case as well.

Otherwise looks fine.  Darin should land this.	r=me.

[Darin Adler]

Comment on attachment 5093 [details]
keep current node ref'd in the XML tokenizer/parser as in the HTML parser

> ~XMLTokenizer() has strange spacing.

Eric and I figured out there was nothing wrong here.

> setCurrentNode() (already mentioned) has strange spacing.

It looks like there are some tabs in there -- I'll fix that.

> If startElementImpl fails to add a node, it can just call stopParsing()?
> That would get rid of the need for your FIXMEs.

> To solve your second FIXME in exitText, I think it's OK to stop parsing in
> enterText in the failure case as well.

Sure, it would be nice to fix those FIXMEs, but I'd prefer to not do that in
this patch. I just wanted to make sure to record it.

> I'm not sure why it's not OK to clear the parent node in this case:
>
> +    if (NodeImpl* par = m_currentNode->parentNode())
> +        setCurrentNode(par);

Generally it's never correct to set the current node to 0; any future parsed
nodes would not know where to go. But I hope we can find a way to make it so
that will never happen -- not moving to the parent seems like it's almost never
correct.

[Lucas Forschler]

Mass moving XML DOM bugs to the "DOM" Component.