On Sun, Sep 10, 2006 at 02:29:44PM +0400, Vitaly Wool wrote: > On 9/9/06, Piet Delaney <[EMAIL PROTECTED]> wrote: > > On Sat, 2006-09-09 at 11:06 -0700, Tom Rini wrote: > > > On Fri, Sep 08, 2006 at 11:15:52PM +0400, Vitaly Wool wrote: > > > > On 9/8/06, Tom Rini <[EMAIL PROTECTED]> wrote: > > > > >When do you want KGDB compiled in, but not usable? Trying to debug a > > > > >module, and building the module with debug info, but not the kernel > > > > >itself? > > > > > > > > Well, that's one of the options. The other thing is, as Kevin Hilman > > > > states. there might be some cases in which a bug 'disappears' when the > > > > kernel is compiled with -g. > > > > > > I know that used to be a problem, but is that still a concern? If so, a > > > big enough concern to make it easy to get things wrong in other cases? > > > > I'd wager 10 to 1 that compiling -g has no impact on performance. It > > did in the old days and with Sun's C compiler but GCC has fixed that > > problem about a decade ago. > > Well, I don't see how it makes easy to get things wrong, first.
My assumption is that most users of KGDB really do want symbolic debugging when they turn on KGDB. > Then, I'm not speaking _only_ about performance. '-g' still has side > effects and probably will have as long as we're living, and maybe even > longer ;) For instance, during the remote debugging, gdb currently > doesn't show the full stack with 'bt' command when the kernel image is > compiled with -g as opposed to the case when it's compiled without, > when the stack is shown normally. That's a different kind of side-effect. MIPS needs to do some of the annotation stuff that was recently done for i386 and x86_64 so the debugger can properly and symbolically unwind the stack. -- Tom Rini ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Kgdb-bugreport mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/kgdb-bugreport
