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Postings from December 2000
Nick Ing-Simmons <nik@tiuk.ti.com> writes: >Nick Ing-Simmons <nik@tiuk.ti.com> writes: > >>B. When I fix A in Tk sources it core dumps in a manner which suggests >> something has done heap-overrun. > >This is a weird one. SPARC/gcc-2.95.2 was botching the test-for-hibit >code in sv_utf8_upgrade and give false positives. (Which is bad >news and I have submitted GNATS report to gcc.) But it seems all that does >is exercise the "representation does not matter" aspect of SvUTF8 ;-) > >It also forced us to confront the case where it tried to upgrade and >Safefree() an SvFAKE sv (or indeed any other SvLEN == 0 non-malloced case). > >This then lead to the core dumps. > >Patch moves the hibit init out of the for loop, makes it an int not a bool (char) >either of which fixes false +ve bug on SPARC/gcc. And corrects the other >two issues for when they really occur. -- Nick Ing-Simmons <nik@tiuk.ti.com> Via, but not speaking for: Texas Instruments Ltd.