Re: Looking for rationale for the minidump format
- In reply to: Ed Maste : "Re: Looking for rationale for the minidump format"
- Go to: [ bottom of page ] [ top of archives ] [ this month ]
Date: Mon, 22 Nov 2021 17:04:40 UTC
On Mon, 2021-11-22 at 10:26 -0500, Ed Maste wrote: > On Sun, 21 Nov 2021 at 09:42, Michał Górny <email@example.com> wrote: > > > > Hi, everyone. > > > > As part of the work contracted by the FreeBSD Foundation, I'm working > > on adding explicit minidump support to LLDB. When discussing > > the options with upstream, I've been asked why FreeBSD created their own > > minidump format. > > > > I did a bit of digging but TBH all the rationale I could get was to > > create partial memory dumps. However, unless I'm mistaken the ELF > > format is perfectly capable of that -- e.g. via creating an explicit > > segment for every continuous active region. > > ELF can, indeed. One of my previous co-op students wrote a little tool > to convert a minidump to ELF, see https://reviews.freebsd.org/D19253. > That's what it does - creates a segment for each contiguous region. If > we ended up going this way we could integrate D19253 into savecore. Thank you for your reply. I think this approach makes sense. Do you want us to pursue updating D19253 to build again (it's failing due to libkvm API changes and -Werror) and moving it into savecore instead of adding FreeBSD minidump support in LLDB? -- Best regards, Michał Górny