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From: Tom Lord <lord@xxxxxxx> Subject: Re: Comparing Pika-syle and JNI-style Date: Wed, 14 Jan 2004 18:35:43 -0800 (PST) > > As Per noted, Boehm GC avoids this if configured with "interior > > pointer" flag. > > Ok, but that doesn't help if the data is separately allocated. If you're accessing the data chunk and no reference except from the scheme_value local variable points to the string header, then the string header can be collected, but that doesn't matter (since you don't need it anyway). > Or, for that matter, if my pointer is pointed past the end of the > string but I'm indexing at a negative offset from it. You can point the next address past the end of chunk and still the chunk is retained, since in C it is a valid pointer usage. (you can change this behavior by configuration option, though). > The whole thing just plays way too fast and loose with C semantics to > be acceptable for critical systems. Yup. I don't object to this feeling. I just wanted to be precise about the facts. --shiro