I don’t totally agree with this. I think there are a lot of useful os awareness tasks in user mode. For example, you’re debugging a deadlock and want to understand the state of other mutexes, who owns them, etc. or you want to examine open file descriptors. In the case of a heap corruption you may wish to study the internal structures of your process’s heap, or even lower level, the os virtual memory page table structures.
There’s quite a lot you can still do in user mode, but definitely there is more in kernel mode. As Leonard said, try put WinDbg as a lot of this stuff already exists so it’s a good reference On Wed, Oct 31, 2018 at 12:08 PM Alexander Polyakov via lldb-dev < lldb-dev@lists.llvm.org> wrote: > Hi Leonard, > > I think it will be kernel-mode debugging since debugging an application in > user mode is not an OS awareness imo. Of course, some of kernel's modules > might run in user-mode, but it will be ok I think. > > Thanks for your reference, I'll take a look at it. > > Also, I found out that ARM supports OS awareness in their DS-5 debugger. > They have a mechanism for adding new operating systems. All you need to do > is to describe OS' model (thread's or task's structure for example). I > think that is how it might be done in LLDB. > > On Wed, Oct 31, 2018 at 9:26 PM Leonard Mosescu <mose...@google.com> > wrote: > >> Hi Alexander, are you interested in user-mode, kernel-mode debugging or >> both? >> >> Fore reference, the current state of the art regarding OS-awareness >> debugging is debugging tools for windows >> <https://docs.microsoft.com/en-us/windows-hardware/drivers/debugger/index> >> (windbg >> & co.). This is not surprising since the tools were developed alongside >> Windows. Obviously they are specific to Windows, but it's good example of >> how the OS-awareness might look like. >> >> >> On Mon, Oct 29, 2018 at 11:37 AM, Alexander Polyakov via lldb-dev < >> lldb-dev@lists.llvm.org> wrote: >> >>> Hi lldb-dev, >>> >>> I'm a senior student at Saint Petersburg State University. The one of my >>> possible diploma themes is "OS Awareness in LLDB". Generally, the OS >>> awareness extends a debugger to provide a representation of the OS threads >>> - or tasks - and other relevant data structures, typically semaphores, >>> mutexes, or queues. >>> >>> I want to ask the community if OS awareness is interesting for LLDB >>> users and developers? The main goal is to create some base on top of LLDB >>> that can be extended to support awareness for different operating systems. >>> >>> Also, if you have a good article or other useful information about OS >>> awareness, please share it with me. >>> >>> Thanks in advance! >>> >>> -- >>> Alexander >>> >>> _______________________________________________ >>> lldb-dev mailing list >>> lldb-dev@lists.llvm.org >>> http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev >>> >>> >> > > -- > Alexander > _______________________________________________ > lldb-dev mailing list > lldb-dev@lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/lldb-dev >
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