https://reviews.llvm.org/D40665 <https://reviews.llvm.org/D40665> https://reviews.llvm.org/D40666 <https://reviews.llvm.org/D40666>
Kuba > On Nov 29, 2017, at 9:34 PM, Kuba Mracek <[email protected]> wrote: > > Thanks, I'll send a patch for review. > > Kuba > >> On Nov 29, 2017, at 9:25 PM, 'Dmitry Vyukov' via address-sanitizer >> <[email protected]> wrote: >> >> On Thu, Nov 30, 2017 at 4:55 AM, Kuba Mracek <[email protected]> wrote: >>> Hi! >>> >>> On Linux, Does MADV_DONTNEED (used in ReleaseMemoryPagesToOS) actually mark >>> the pages as free to be overwritten with zeroes? >> >> Yes, on linux it works as intended. >> >> >>> It seems that the POSIX >>> explanation of POSIX_MADV_DONTNEED means something different ("the system >>> can page the memory out, but not discard the content"). Darwin and BSD >>> understand MADV_DONTNEED in the POSIX sense, which means that >>> ReleaseMemoryPagesToOS doesn't really release any memory on those systems. >>> Does it make sense to use some other mechanism of releasing the pages? >> >> On darwin/bsd we should use MADV_FREE instead. >> >> -- >> You received this message because you are subscribed to the Google Groups >> "address-sanitizer" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> For more options, visit https://groups.google.com/d/optout. > > -- > You received this message because you are subscribed to the Google Groups > "address-sanitizer" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "address-sanitizer" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
