On Thu, 2024-08-22 at 15:55 -0700, Andrii Nakryiko wrote: > > > + madvise(addr, page_sz, MADV_POPULATE_READ); > > > > Nit: check error code? > > Well, even if this errors out there is no one to notice and do > anything about it, given this is in a forked process. The idea, > though, is that if this doesn't work, we'll catch it as part of the > actual selftest. Ok. [...] > In my QEMU I only get 3: > > FRAME #00: BUILD ID = d370860567af6d28316d45726045f1c59bbfc416 OFFSET = 2c4156 > FRAME #01: BUILD ID = d370860567af6d28316d45726045f1c59bbfc416 OFFSET = 393ac7 > FRAME #02: BUILD ID = 8bfe03f6bf9b6a6e2591babd0bbc266837d8f658 OFFSET = 27cd0 > > But see below, for my actual devserver there are 4 frames. My bet > would be that 568ef is libc. A bit confused why you get frame 04 from > uprobe_multi, but maybe that's how things work with musl or whatever? > Don't know. Check libc.so. Oh, right, I had to check libc build-id inside QEMU, not outside... Yes, this is libc signature. This figures, thank you for explaining. [...]
