J?rgen Keil wrote: > I'm not exactly sure when it happened (somewhere between snv_98 > and snv_100), but starting a couple of weeks ago kmdb appears to > have lost the ability to display parameter values in stack backtraces > on the amd64 platform. > > E.g. on an old build 82 or wiith an opensolaris snv_97 livecd, > mdb -k / kmdb was able to show a stack backtrace like this: > >> ::pgrep init | ::walk thread | ::findstack -v > stack pointer for thread ffffff01c9373b20: ffffff0007b6fc00 > [ ffffff0007b6fc00 _resume_from_idle+0xf1() ] > ffffff0007b6fc40 swtch+0x17f() > ffffff0007b6fcd0 cv_timedwait_sig+0x194(ffffff01c939663a, ffffff01c9396600, > 719e2) > ffffff0007b6fd60 cv_waituntil_sig+0xbb(ffffff01c939663a, ffffff01c9396600, > ffffff0007b6fe80, 2) > ffffff0007b6fe40 poll_common+0x3dd(806b500, 1, ffffff0007b6fe80, 0) > ffffff0007b6fec0 pollsys+0xec(806b500, 1, 80475f8, 0) > ffffff0007b6ff10 sys_syscall32+0x101() > > > But with snv_100 or newer, all I get is this: > >> ::pgrep init | ::walk thread | ::findstack -v > stack pointer for thread ffffff02d38dbb20: ffffff000f917c50 > [ ffffff000f917c50 _resume_from_idle+0xf1() ] > ffffff000f917c80 swtch+0x160() > ffffff000f917cf0 cv_timedwait_sig+0x1c0() > ffffff000f917d60 cv_waituntil_sig+0xb0() > ffffff000f917e40 poll_common+0x465() > ffffff000f917ec0 pollsys+0xe8() > ffffff000f917f10 sys_syscall32+0x101() > > > Is it possible that the switch to the studio 12 compiler > did break this kmdb feature?
Yes, and it was noticed starting with daily.0925. http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6753543 6753543 is_argsaved() needs to be augmented for SS12 This is one of the fixes that's gone into the new compilers, I'm not sure whether the patch (-08, iirc) is available on sunsolve yet. I don't know whether the tarball via opensolaris.org has been updated either, sorry. James -- Senior Kernel Software Engineer, Solaris Sun Microsystems http://blogs.sun.com/jmcp http://www.jmcp.homeunix.com/blog
