I'm working on an app running under Win7 that embeds Gecko and I've run
into a crash during XRE_TermEmbedding that I'm trying to resolve. The
stack track for the crash is:
xul.dll!nsCOMPtr<nsIDirectoryServiceProvider>::~nsCOMPtr<nsIDirectoryServiceProvider>()
xul.dll!nsXREDirProvider::~nsXREDirProvider()
xul.dll!nsXREDirProvider::`scalar deleting destructor'()
xul.dll!XRE_TermEmbedding()
The actual line of code that crashes is in ~nsCOMPtr in nsCOMPtr.h:
NSCAP_RELEASE(this, mRawPtr);
because Visual Studio is convinced that mRawPtr points to an invalid
memory location (0xFEEEFEEE in this case) and I tend to agree.
The nsCOMPtr object in question is gDirServiceProvider which
XRE_TermEmbedding deletes.
From looking at XRE_TermEmbedding, I can't tell what the right fix is
-- perhaps a change to nsXREDirProvider::DoShutdown, or a change in the
order of the function calls? Or most likely, I need to change something
in my code. I could use a hand with this.
I can reproduce this by calling
nsIWebNavigation::LoadURI("http://google.com";) and then calling
nsIWebNavigation::Stop(nsIWebNavigation::STOP_ALL) (and the rest of the
cleanup done embedding/tests/winEmbed/winEmbed.cpp does in
WebBrowserChromeUI::Destroy) before the URI has been loaded.
I can also reproduce this by waiting until the URI is all the way loaded
(or at least I receive the nsIWebProgressListener::OnStateChange call
with STATE_STOP | STATE_IS_NETWORK | STATE_IS_WINDOW with status 0.
It crashes whether I pass nsnull as the aAppDirProvider argument to
XRE_InitEmbedding or my own nsIDirectoryServiceProvider implementation.
I've have the log from "all:5" with my own nsIDirectoryServiceProvider
implementation but it's too big to get to the list unmoderated (75k).
I'm not sending a simple test case because I don't have one. I'll
create one if necessary but I hope there's enough here to go on.
Thanks much for your help.
-DB
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