On Jun 30 10:11, Jeremy Drake via Cygwin-patches wrote: > On Mon, 30 Jun 2025, Corinna Vinschen wrote: > > > On Jun 27 10:34, Jeremy Drake via Cygwin-patches wrote: > > > On Fri, 27 Jun 2025, Corinna Vinschen wrote: > > > > > > > On Jun 26 13:31, Jeremy Drake via Cygwin-patches wrote: > > > > > BTW, I noticed while editing mingw/Makefile.am, shouldn't cygload have > > > > > -Wl,--disable-high-entropy-va in LDFLAGS? > > > > > > > > Why? > > > > > > With high-entropy-va, it has been observed that the PEB, TEB and stack can > > > happen to overlap with the cygheap > > > https://cygwin.com/pipermail/cygwin/2024-May/256000.html > > > > Yeah, but HEVA simply breaks fork. We don't have to test this, because > > it won't work and we don't do it. You can set the PE flag, but than > > you're on your own. > > Outside of fork, is cygheap able to "relocate" in case the memory it would > like to occupy is already used?
I don't think so, without checking and, well, fixing every pointer usage potentially pointing into the cygheap. Even fhandlers have pointers to fhandlers... Corinna
