Re: crash with cfftpstream
Re: crash with cfftpstream
- Subject: Re: crash with cfftpstream
- From: Jeremy Wyld <email@hidden>
- Date: Thu, 23 Sep 2004 17:49:42 -0700
It's a bug in CFFTPStream. I'd suggest not releasing the proxy
dictionary until your release the stream. See if that fixes it for
you.
jeremy
On Sep 23, 2004, at 5:20 PM, Frederick Cheung wrote:
I'm using CFFTPStream to list the files on an ftp server and I'm
getting a crash when I set kCFStreamPropertyFTPProxy.
I'm actually listing files recursively and have asked for persistent
connections (which I am getting). It never seems to crash on the first
listing, it's always some point further down the road
I am setting proxy settings like like so:
proxyDict=SCDynamicStoreCopyProxies(NULL);
if(proxyDict){
CFReadStreamSetProperty
(readStreamRef,kCFStreamPropertyFTPProxy,proxyDict);
CFRelease(proxyDict);
}
My app crashes systematically if I do this, and never crashes if I do
not set the proxies. I don't use a proxy server, so the only key in
the dictionary that might be of use to CFFTPStream is the one relating
to passive FTP.
When the crash occurs, the backtrace looks like this:
Exception: EXC_BAD_ACCESS (0x0001)
Codes: KERN_INVALID_ADDRESS (0x0001) at 0x776f726b
[snip]
Thread 7 Crashed:
0 libobjc.A.dylib 0x908311f4 objc_msgSend + 0x14
1 com.apple.CFNetwork 0x92757be8
_CFNetworkFindProxyForURL + 0x104
2 com.apple.CFNetwork 0x9275b55c _FTPStreamOpen +
0x104
3 com.apple.CoreFoundation 0x901c2480 _CFStreamOpen + 0x74
4 com.apple.CoreFoundation 0x901cfaa4 CFReadStreamOpen +
0xac
I'm running my tests against an ftp server on my own machine so the
url looks like ftp://127.0.0.1/foo. It doesn't systematically crash on
the same URL every time.
Any ideas as to what is going on?
Fred
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It's a bug in CFFTPStream. I'd suggest not releasing the proxy
dictionary until your release the stream. See if that fixes it for
you.
jeremy
On Sep 23, 2004, at 5:20 PM, Frederick Cheung wrote:
I'm using CFFTPStream to list the files on an ftp server and I'm
getting a crash when I set kCFStreamPropertyFTPProxy.
I'm actually listing files recursively and have asked for persistent
connections (which I am getting). It never seems to crash on the first
listing, it's always some point further down the road
I am setting proxy settings like like so:
proxyDict=SCDynamicStoreCopyProxies(NULL);
if(proxyDict){
CFReadStreamSetProperty
(readStreamRef,kCFStreamPropertyFTPProxy,proxyDict);
CFRelease(proxyDict);
}
My app crashes systematically if I do this, and never crashes if I do
not set the proxies. I don't use a proxy server, so the only key in the
dictionary that might be of use to CFFTPStream is the one relating to
passive FTP.
When the crash occurs, the backtrace looks like this:
Exception: EXC_BAD_ACCESS (0x0001)
Codes: KERN_INVALID_ADDRESS (0x0001) at 0x776f726b
[snip]
Thread 7 Crashed:
0 libobjc.A.dylib 0x908311f4 objc_msgSend + 0x14
1 com.apple.CFNetwork 0x92757be8
_CFNetworkFindProxyForURL + 0x104
2 com.apple.CFNetwork 0x9275b55c _FTPStreamOpen + 0x104
3 com.apple.CoreFoundation 0x901c2480 _CFStreamOpen + 0x74
4 com.apple.CoreFoundation 0x901cfaa4 CFReadStreamOpen +
0xac
I'm running my tests against an ftp server on my own machine so the url
looks like ftp://127.0.0.1/foo. It doesn't systematically crash on the
same URL every time.
Any ideas as to what is going on?
Fred
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_______________________________________________
Do not post admin requests to the list. They will be ignored.
Macnetworkprog mailing list (email@hidden)
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This email sent to email@hidden