What about the case where you already have a Unix core file and you aren't in a debugger but just want to convert it? It seems like we could have a standalone utility that did that (one could imagine doing the reverse too). I'm wondering if it wouldn't be possible to do this as a library or something that didn't have any dependencies on LLDB, that way a standalone tool could link against this library, and so could LLDB. I think this would improve its usefulness quite a bit.
On Wed, Jun 13, 2018 at 2:42 PM Greg Clayton <clayb...@gmail.com> wrote: > The goal is to take a live process (regular process just stopped, or a > core file) and run "save_minidump ..." as a command and export a minidump > file that can be sent elsewhere. Unix core files are too large to always > send and they are less useful if they are not examined in the machine that > they were produced on. So LLDB gives us the connection to the live process, > and we can then create a minidump file. I am going to create a python > module that can do this for us. > > Greg > > > On Jun 13, 2018, at 2:29 PM, Zachary Turner via lldb-dev < > lldb-dev@lists.llvm.org> wrote: > > Also, if the goal is to have this upstream somewhere, it would be nice to > have a tool this be a standalone tool. This seems like something that you > shouldn't be required to start up a debugger to do, and probably doesn't > have many (or any for that matters) on the rest of LLDB. > > On Wed, Jun 13, 2018 at 1:58 PM Leonard Mosescu <mose...@google.com> > wrote: > >> That being said, it's not exactly trivial to produce a good minidump. >>> Crashpad <https://chromium.googlesource.com/crashpad/crashpad>has a >>> native & cross-platform minidump writer, that's what I'd start with. >>> >> >> Addendum: I realized after sending the email that if the goal is to >> convert core files -> LLDB -> minidump a lot of the complexity found in >> Crashpad can be avoided, so perhaps writing an LLDB minidump writer from >> scratch would not be too bad. >> >> On Wed, Jun 13, 2018 at 1:50 PM, Leonard Mosescu <mose...@google.com> >> wrote: >> >>> The minidump format is more or less documented in MSDN >>> <https://msdn.microsoft.com/en-us/library/windows/desktop/ms679293(v=vs.85).aspx> >>> . >>> >>> That being said, it's not exactly trivial to produce a good minidump. >>> Crashpad >>> <https://chromium.googlesource.com/crashpad/crashpad>has a native & >>> cross-platform minidump writer, that's what I'd start with. >>> >>> On Wed, Jun 13, 2018 at 1:38 PM, Adrian McCarthy via lldb-dev < >>> lldb-dev@lists.llvm.org> wrote: >>> >>>> Zach's right. On Windows, lldb can produce a minidump, but it just >>>> calls out to a Microsoft library to do so. We don't have any >>>> platform-agnostic code for producing a minidump. >>>> >>>> I've also pinged another Googler who I know might be interested in >>>> converting between minidumps and core files (the opposite direction) to see >>>> if he has any additional info. I don't think he's on lldb-dev, though, so >>>> I'll act as a relay if necessary. >>>> >>>> On Wed, Jun 13, 2018 at 12:07 PM, Zachary Turner via lldb-dev < >>>> lldb-dev@lists.llvm.org> wrote: >>>> >>>>> We can’t produce them, but you should check out the source code of >>>>> google breakpad / crashpad which can. >>>>> >>>>> That said it’s a pretty simple format, there may be enough in our >>>>> consumer code that should allow you to produce them >>>>> >>>>> >>>>> _______________________________________________ >>>>> lldb-dev mailing list >>>>> lldb-dev@lists.llvm.org >>>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev >>>>> >>>>> >>>> >>>> _______________________________________________ >>>> lldb-dev mailing list >>>> lldb-dev@lists.llvm.org >>>> http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev >>>> >>>> >>> >> _______________________________________________ > lldb-dev mailing list > lldb-dev@lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev > > >
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