Thank you. I now officially know that I don’t understand. Sorry. On Sun, Jun 7, 2020 at 7:54 AM Viktor Kojouharov <vkojouha...@gmail.com> wrote:
> The pointer is being copied via typedmemmove, which itself calls memmove, > which, according to its documentation, copies bytes from the source to the > destination. Not sure why that would be impossible, considering it does > work for some code (the source pointer preserves its data) > > Not sure what you mean by "copied via unsafe". Also, the source pointer > never goes out of scope. It's part of a struct that is passed to the > function that calls typedmemmove, and its lifetime is more or less static. > So while the destination pointers go out of scope, the source one never > does. > > > On Sunday, June 7, 2020 at 4:45:40 PM UTC+3, Michael Jones wrote: >> >> Do you mean that you have a problem with the value of the pointer? That >> is "copying the pointer." This seems impossible. >> >> Attempting to access through a pointer copied via unsafe is (generally) >> inviting doom, and seems highly possible. The instant the last pointer to >> that data goes out of scope the address range occupied by the formerly >> pointed to items is formally inaccessible. Using unsafe to keep a shadow >> copy of the address and then poking around is quite likely to fail, and >> even when it does not, it is quite likely to be meaningless. (random data >> from some other use). >> >> If I misunderstood, please forgive me. >> >> On Sun, Jun 7, 2020 at 6:15 AM Viktor Kojouharov <vkojo...@gmail.com> >> wrote: >> >>> p.s. should such questions be posted in golang-dev, since it deals with >>> runtime internals? >>> >>> -- >>> You received this message because you are subscribed to the Google >>> Groups "golang-nuts" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to golan...@googlegroups.com. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/golang-nuts/71d7fb5c-3ef5-4611-b9ce-299f7b90945eo%40googlegroups.com >>> <https://groups.google.com/d/msgid/golang-nuts/71d7fb5c-3ef5-4611-b9ce-299f7b90945eo%40googlegroups.com?utm_medium=email&utm_source=footer> >>> . >>> >> >> >> -- >> >> *Michael T. jonesmichae...@gmail.com* >> > -- > You received this message because you are subscribed to the Google Groups > "golang-nuts" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to golang-nuts+unsubscr...@googlegroups.com. > To view this discussion on the web visit > https://groups.google.com/d/msgid/golang-nuts/fa18bf7e-8965-4917-9d81-00a8f43289c3o%40googlegroups.com > <https://groups.google.com/d/msgid/golang-nuts/fa18bf7e-8965-4917-9d81-00a8f43289c3o%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- *Michael T. jonesmichael.jo...@gmail.com <michael.jo...@gmail.com>* -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/golang-nuts/CALoEmQyBHzkKdYQ_7HF%3DQhmg5na2PZfhi0QmMkOtXY-%3Dh5u3vw%40mail.gmail.com.
