Re: printing a stack trace to the console
Re: printing a stack trace to the console
- Subject: Re: printing a stack trace to the console
- From: Allan Odgaard <email@hidden>
- Date: Wed, 31 Mar 2004 11:07:27 +0200
On 31. Mar 2004, at 10:44, Jonathan Sand wrote:
I've looked into "defaults write NSGlobalDomain NSExceptionHandlingMask
63" but defaults apparently doesn't work quite that way anymore.
I do this in code:
[[NSExceptionHandler defaultExceptionHandler]
setExceptionHandlingMask:NSLogAndHandleEveryExceptionMask];
If it did, I could write the following objective-C method:
- (void)printStackTrace {
NS_DURING
[NSException raise:0 format:@"stack trace requested!"];
NS_HANDLER
NSLog(@"%@", [localException userInfo]);
NS_ENDHANDLER
}
That's pretty much what I do, except that I use 'atos' to convert the
address to symbols and 'c++filt' to demangle the C++ symbols (and then
'tail' to cut the first few lines and 'cat' to enumerate the listing),
all in all my NS_HANDLER ends up being:
fprintf(stderr, "------ STACK TRACE ------\n");
if(id trace = [[localException userInfo]
objectForKey:NSStackTraceKey])
{
NSString* str = [NSString stringWithFormat:@"/usr/bin/atos -p %d
%@ | tail -n +4 | c++filt3 | cat -n", getpid(), trace];
if(FILE* fp = popen([str UTF8String], "r"))
{
unsigned char resBuf[512];
while(size_t len = fread(resBuf, 1, sizeof(resBuf), fp))
fwrite(resBuf, 1, len, stderr);
pclose(fp);
}
}
fprintf(stderr, "-------------------------\n");
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