Re: [Htmlvalidator-help] FreeBSD

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What happen at this line in JavaScript, is that Mozilla js create a 
XPCOM object.
You can have a lot more info about XPCOM here.

http://www.mozilla.org/projects/xpcom/book/cxc/html/quicktour2.html

A XPCOM object is  a C++ or Javascript object. That is not special at 
all. The only
special thing is that his header is not defined in a .h file but in a 
.idl file. It allows to
Mozilla to created a kind of registry of available objects types.

This line creates a object instance: (a XPCOM object)
var tidy_inst = Components.classes["@mozilla.org/tidy;1"].createInstance();

What is really called in my code is just the TidyImpl constructor.
The rest  is generated by Mozilla. And the error you get, 
nsTidyImpl_GetInterfacesHelper
is not inside my code. I suppose it is generated by one of the MACRO 
definition
in nsTidy.cpp
or nsTidyModule.cpp

like NS_IMPL_ISUPPORTS1_CI(nsTidyImpl, nsITidy)

What I misunderstand is why you get such error when it works on other 
platforms ?
If XPCOM was not working at all Firefox would not work at all. So, this is
very strange.

Marc

[LoN]Kamikaze wrote:
> I have found some volunteers who help me testing. Here is some 
> debugging output:
>
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 0x8067000 (LWP 100161)]
> 0x29ffeb0b in nsTidyImpl_GetInterfacesHelper ()
> from 
> /home/fk/.mozilla/firefox/a08wllhs.default/extensions/{3b56bcc7-54e5-44a2-9b44-66c3ef58c13e}/components/libnstidy.so
> (gdb) where
> #0 0x29ffeb0b in nsTidyImpl_GetInterfacesHelper ()
> from 
> /home/fk/.mozilla/firefox/a08wllhs.default/extensions/{3b56bcc7-54e5-44a2-9b44-66c3ef58c13e}/components/libnstidy.so
> #1 0x2817370a in nsGenericFactory::~nsGenericFactory () from 
> /usr/X11R6/lib/firefox/libxpcom_core.so
> #2 0x28f1a825 in XPCNativeSet::GetNewOrUsed () from 
> /usr/X11R6/lib/firefox/components/libxpconnect.so
> #3 0x28f1f5f7 in XPCWrappedNativeProto::GetNewOrUsed () from 
> /usr/X11R6/lib/firefox/components/libxpconnect.so
> #4 0x28f17dc8 in XPCWrappedNative::GetNewOrUsed () from 
> /usr/X11R6/lib/firefox/components/libxpconnect.so
> #5 0x28efd0e1 in XPCConvert::NativeInterface2JSObject () from 
> /usr/X11R6/lib/firefox/components/libxpconnect.so
> #6 0x28ef03c8 in nsXPConnect::IsISupportsDescendant () from 
> /usr/X11R6/lib/firefox/components/libxpconnect.so
> #7 0x28f04c51 in nsJSCID::NewID () from 
> /usr/X11R6/lib/firefox/components/libxpconnect.so
> #8 0x281d2f1b in XPTC_InvokeByIndex () from 
> /usr/X11R6/lib/firefox/libxpcom_core.so
> #9 0x28f153dc in XPCWrappedNative::CallMethod () from 
> /usr/X11R6/lib/firefox/components/libxpconnect.so
> #10 0x28f1bf9f in XPC_WN_CallMethod () from 
> /usr/X11R6/lib/firefox/components/libxpconnect.so
> #11 0x280e1de9 in js_Invoke () from /usr/X11R6/lib/firefox/libmozjs.so
> #12 0x280d871e in js_Interpret () from /usr/X11R6/lib/firefox/libmozjs.so
> #13 0x280e1eb4 in js_Invoke () from /usr/X11R6/lib/firefox/libmozjs.so
> #14 0x280d5da5 in js_Interpret () from /usr/X11R6/lib/firefox/libmozjs.so
> #15 0x280e1416 in js_Execute () from /usr/X11R6/lib/firefox/libmozjs.so
> #16 0x280a78b3 in JS_ExecuteScript () from 
> /usr/X11R6/lib/firefox/libmozjs.so
> #17 0x29c57425 in nsJSContext::ExecuteScript () from 
> /usr/X11R6/lib/firefox/components/libgklayout.so
>
> Attached is the complete output of Firefox with debugging symbols. 
> Maybe you can make something of this.
>
> ------------------------------------------------------------------------
>
> Reading symbols from 
> /home/fk/.mozilla/firefox/a08wllhs.default/extensions/{3b56bcc7-54e5-44a2-9b44-66c3ef58c13e}/components/libnstidy.so...done.
> Loaded symbols for 
> /home/fk/.mozilla/firefox/a08wllhs.default/extensions/{3b56bcc7-54e5-44a2-9b44-66c3ef58c13e}/components/libnstidy.so
> Reading symbols from /libexec/ld-elf.so.1...done.
> Loaded symbols for /libexec/ld-elf.so.1
> #0 0x28bbcccb in pthread_testcancel () from /usr/lib/libpthread.so.2
> [New Thread 0x8542400 (sleeping)]
> [New Thread 0x83a1600 (sleeping)]
> [New Thread 0x82eaa00 (sleeping)]
> [New Thread 0x8209800 (sleeping)]
> [New Thread 0x80abe00 (runnable)]
> [New Thread 0x80abc00 (LWP 100120)]
> [New Thread 0x8078000 (LWP 100180)]
> (gdb) where
> #0 0x28bbcccb in pthread_testcancel () from /usr/lib/libpthread.so.2
> #1 0x28bab5eb in sigaction () from /usr/lib/libpthread.so.2
> #2 0x28ba4c05 in pthread_kill () from /usr/lib/libpthread.so.2
> #3 0x28ba4512 in raise () from /usr/lib/libpthread.so.2
> #4 0x08068961 in nsProfileLock::FatalSignalHandler (signo=11) at 
> nsProfileLock.cpp:206
> #5 0x28ba946b in sigaction () from /usr/lib/libpthread.so.2
> #6 0x28bab091 in sigaction () from /usr/lib/libpthread.so.2
> #7 0x28bb3efb in pthread_mutexattr_init () from /usr/lib/libpthread.so.2
> #8 0x28bb3f64 in pthread_mutexattr_init () from /usr/lib/libpthread.so.2
> #9 0x28c8b5bf in _ctx_start () from /lib/libc.so.6
> #10 0x00000000 in ?? ()
> #11 0xbfbfd230 in ?? ()
> #12 0xbfbfcf70 in ?? ()
> #13 0x00000000 in ?? ()
> #14 0x28bb3f22 in pthread_mutexattr_init () from /usr/lib/libpthread.so.2
> #15 0x281bac53 in nsGenericFactory::GetInterfaces (this=0x1, 
> countp=0x8078000, array=0x8078000) at nsGenericFactory.cpp:99
> #16 0x28dde135 in XPCNativeSet::GetNewOrUsed (ccx=@0xbfbfd5d8, 
> classInfo=0x8818ba4) at xpcwrappednativeinfo.cpp:604
> #17 0x28de5225 in XPCWrappedNativeProto::GetNewOrUsed 
> (ccx=@0xbfbfd5d8, Scope=0x84bfb40, ClassInfo=0x8818ba4, 
> ScriptableCreateInfo=0xbfbfd4e8,
> ForceNoSharing=0) at xpcprivate.h:3363
> #18 0x28dd46c1 in XPCWrappedNative::GetNewOrUsed (ccx=@0xbfbfd5d8, 
> Object=0x8818be0, Scope=0x84bfb40, Interface=0x81425e0,
> resultWrapper=0xbfbfd574) at xpcprivate.h:3366
> #19 0x28db6bea in XPCConvert::NativeInterface2JSObject 
> (ccx=@0xbfbfd5d8, dest=0xbfbfd6f8, src=0x8818be0, iid=0xbfbfd788, 
> scope=0x84bfb40,
> allowNativeWrapper=0, pErr=0xbfbfd5d4) at xpcprivate.h:3362
> #20 0x28d9bc8a in nsXPConnect::WrapNative (this=0x8136380, 
> aJSContext=0x84ae800, aScope=0xbfbfd5d8, aCOMObj=0x8818be0, 
> aIID=@0xbfbfd788,
> _retval=0xbfbfd6f8) at nsXPConnect.cpp:586
> #21 0x28dbfa89 in nsJSCID::CreateInstance (this=0x87793c0, 
> _retval=0xbfbfd9f0) at nsCOMPtr.h:1149
> #22 0x2824f158 in XPTC_InvokeByIndex (that=0x87793c0, methodIndex=10, 
> paramCount=134709248, params=0xbfbfd9f0) at xptcinvoke_unixish_x86.cpp:179
> #23 0x28dd9521 in XPCWrappedNative::CallMethod (ccx=@0xbfbfdad0, 
> mode=XPCWrappedNative::CALL_METHOD) at xpcwrappednative.cpp:2151
> #24 0x28de3941 in XPC_WN_CallMethod (cx=0x84ae800, obj=0x877e450, 
> argc=0, argv=0xbfbfdad0, vp=0xbfbfdc10) at xpcwrappednativejsops.cpp:1445
> #25 0x280e54d1 in js_Invoke (cx=0x84ae800, argc=0, flags=0) at 
> jsinterp.c:1188
> #26 0x280f20de in js_Interpret (cx=0x84ae800, pc=0x8782a0f ":", 
> result=0xbfbfdecc) at jsinterp.c:3583
> #27 0x280e5543 in js_Invoke (cx=0x84ae800, argc=1, flags=1) at 
> jsinterp.c:1208
> #28 0x280edd9e in js_Interpret (cx=0x84ae800, pc=0x876f93a "#", 
> result=0xbfbfe1a0) at jsinterp.c:3128
> #29 0x280e5d5f in js_Execute (cx=0x84ae800, chain=0x83d1f80, 
> script=0x881f400, down=0x0, flags=382, result=0x17e) at jsinterp.c:1434
> #30 0x280bb7b3 in JS_ExecuteScript (cx=0x84ae800, obj=0x83d1f80, 
> script=0x881f400, rval=0xbfbfe254) at jsapi.c:4012
> #31 0x2a2263d1 in nsJSContext::ExecuteScript (this=0x84bfb00, 
> aScriptObject=0x870c230, aScopeObject=0x83d1f80, aRetValue=0x0, 
> aIsUndefined=0x0)
> at nsJSEnvironment.cpp:1216
> #32 0x2a1fdc78 in nsXULDocument::ExecuteScript (this=0x8450948, 
> aScriptObject=0x870c230) at nsXULDocument.cpp:3558
> ---Type <return> to continue, or q <return> to quit---
> #33 0x2a1fd8fa in nsXULDocument::OnStreamComplete (this=0x8450800, 
> aLoader=0x8800400, context=0x0, aStatus=0, stringLen=39007,
> string=0x87c9008 "//", '*' <repeats 73 times>, "\r\n// HTML 
> Validator\r\n//\r\n// File: tidyBrowser.js\r\n// Description: 
> javascript to validate the HTML in the browser window\r\n//"...) at 
> nsXULDocument.cpp:3452
> #34 0x28ef015f in nsStreamLoader::OnStopRequest (this=0x8800400, 
> request=0x87eaf00, ctxt=0x0, aStatus=0) at nsCOMPtr.h:1149
> #35 0x2912b92c in nsJARChannel::OnStopRequest (this=0x87eaf00, 
> req=0x87f1e80, ctx=0x0, status=0) at nsCOMPtr.h:1149
> #36 0x28ec4a47 in nsInputStreamPump::OnStateStop (this=0x87f1e80) at 
> nsCOMPtr.h:1149
> #37 0x28ec44a1 in nsInputStreamPump::OnInputStreamReady 
> (this=0x87f1e80, stream=0x87ead0c) at nsInputStreamPump.cpp:343
> #38 0x28201ef5 in nsInputStreamReadyEvent::EventHandler 
> (plevent=0x17e) at nsStreamUtils.cpp:119
> #39 0x282258ed in PL_HandleEvent (self=0x88005c4) at plevent.c:688
> #40 0x282257b9 in PL_ProcessPendingEvents (self=0x8136740) at 
> plevent.c:623
> #41 0x2822880b in nsEventQueueImpl::ProcessPendingEvents 
> (this=0x8136700) at nsEventQueue.cpp:417
> #42 0x291645f6 in event_processor_callback (source=0x84f1440, 
> condition=G_IO_IN, data=0x1) at nsAppShell.cpp:67
> #43 0x2898bfdf in g_vasprintf () from /usr/local/lib/libglib-2.0.so.0
> #44 0x289648a8 in g_main_depth () from /usr/local/lib/libglib-2.0.so.0
> #45 0x289656fc in g_main_context_dispatch () from 
> /usr/local/lib/libglib-2.0.so.0
> #46 0x28965ac1 in g_main_context_dispatch () from 
> /usr/local/lib/libglib-2.0.so.0
> #47 0x289660e6 in g_main_loop_run () from /usr/local/lib/libglib-2.0.so.0
> #48 0x28428534 in gtk_main () from /usr/X11R6/lib/libgtk-x11-2.0.so.0
> #49 0x29164b9d in nsAppShell::Run (this=0x81df370) at nsAppShell.cpp:139
> #50 0x29269ad6 in nsAppStartup::Run (this=0x81de3c0) at 
> nsAppStartup.cpp:150
> #51 0x0805718f in XRE_main (argc=1, argv=0x8286f00, 
> aAppData=0xbfbfe9f0) at nsAppRunner.cpp:2374
> #52 0x0804e977 in main (argc=1, argv=0xbfbfead8) at nsBrowserApp.cpp:61
> (gdb) quit
>
>
> ------------------------------------------------------------------------
>
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