Re: [Crash-utility] Crash problems with Xen

On 03/10/15 09:49, Dave Anderson wrote: > > > ----- Original Message ----- >> Hi, >> >> for me crash failed to debug xen environments with: >> >> crash: invalid structure member offset: domain_is_paused_by_controller >> FILE: xen_hyper.c LINE: 1255 FUNCTION: >> xen_hyper_store_domain_context() >> >> [/usr/bin/crash] error trace: 546170 => 545bc9 => 545a81 => 510fd0 >> >> 510fd0: OFFSET_verify+224 >> 545a81: xen_hyper_store_domain_context+1265 >> 545bc9: xen_hyper_refresh_domain_context_space+153 >> 546170: xen_hyper_domain_init+864 >> >> The problem is a change of an item in struct domain in xen version 4.2 This is not 100% correct. The versions are: 4.2.5, 4.3.3, 4.4.1, 4.5.0

>> I tried to fix the problem for me so I can debug the old and the newer >> xen versions. I'm not sure this was the right way to fix this. >> Thanks. >> >> Dietmar. > > Your patch looks reasonable. I have two *very* minor nits: > > (1) Put the new domain_controller_pause_count at the end of the xen_hyper_offset_table. > In the fairly unlikely event that somebody has an extension module for xen > debugging, it will break unless recompiled. > (2) In xen_hyper_dump_xen_hyper_offset_table(), display both the old and new offsets. > That fact that one or the other shows -1 would be more helpful than not showing it. > I will 2nd the output of both.

-Don Slutz > Note that these suggestions apply to the mainline offset[] table and the dump_offset_table() > function. > > Thanks, > Dave > > >> >> diff -pNaur crash-7.1.0-org/xen_hyper.c crash-7.1.0/xen_hyper.c >> --- crash-7.1.0-org/xen_hyper.c 2015-02-06 19:44:11.000000000 +0100 >> +++ crash-7.1.0/xen_hyper.c 2015-03-10 13:57:48.000000000 +0100 >> @@ -218,7 +218,12 @@ xen_hyper_domain_init(void) >> XEN_HYPER_MEMBER_OFFSET_INIT(domain_is_polling, "domain", "is_polling"); >> >> XEN_HYPER_MEMBER_OFFSET_INIT(domain_is_dying, "domain", "is_dying"); >> + /* >> + * In Xen 4.2 is_paused_by_controller changed to >> + * controller_pause_count. >> + */ >> XEN_HYPER_MEMBER_OFFSET_INIT(domain_is_paused_by_controller, "domain", >> "is_paused_by_controller"); >> + XEN_HYPER_MEMBER_OFFSET_INIT(domain_controller_pause_count, "domain", >> "controller_pause_count"); >> XEN_HYPER_MEMBER_OFFSET_INIT(domain_is_shutting_down, "domain", >> "is_shutting_down"); >> XEN_HYPER_MEMBER_OFFSET_INIT(domain_is_shut_down, "domain", >> "is_shut_down"); >> XEN_HYPER_MEMBER_OFFSET_INIT(domain_vcpu, "domain", "vcpu"); >> @@ -1269,9 +1274,15 @@ xen_hyper_store_domain_context(struct xe >> *(dp + XEN_HYPER_OFFSET(domain_is_polling))) { >> dc->domain_flags |= XEN_HYPER_DOMS_polling; >> } >> - if (*(dp + XEN_HYPER_OFFSET(domain_is_paused_by_controller))) { >> + if (XEN_HYPER_VALID_MEMBER(domain_is_paused_by_controller) && >> + *(dp + XEN_HYPER_OFFSET(domain_is_paused_by_controller))) { >> dc->domain_flags |= XEN_HYPER_DOMS_ctrl_pause; >> } >> + if (XEN_HYPER_VALID_MEMBER(domain_controller_pause_count) && >> + *(dp + XEN_HYPER_OFFSET(domain_controller_pause_count))) { >> + dc->domain_flags |= XEN_HYPER_DOMS_ctrl_pause; >> + } >> + >> if (*(dp + XEN_HYPER_OFFSET(domain_is_dying))) { >> dc->domain_flags |= XEN_HYPER_DOMS_dying; >> } >> diff -pNaur crash-7.1.0-org/xen_hyper_defs.h crash-7.1.0/xen_hyper_defs.h >> --- crash-7.1.0-org/xen_hyper_defs.h 2015-02-06 19:44:11.000000000 +0100 >> +++ crash-7.1.0/xen_hyper_defs.h 2015-03-10 13:52:37.000000000 +0100 >> @@ -679,6 +679,7 @@ struct xen_hyper_offset_table { >> long domain_is_polling; >> long domain_is_dying; >> long domain_is_paused_by_controller; >> + long domain_controller_pause_count; >> long domain_is_shutting_down; >> long domain_is_shut_down; >> long domain_vcpu; >> diff -pNaur crash-7.1.0-org/xen_hyper_dump_tables.c >> crash-7.1.0/xen_hyper_dump_tables.c >> --- crash-7.1.0-org/xen_hyper_dump_tables.c 2015-02-06 19:44:11.000000000 >> +0100 >> +++ crash-7.1.0/xen_hyper_dump_tables.c 2015-03-10 14:00:20.000000000 +0100 >> @@ -784,8 +784,14 @@ xen_hyper_dump_xen_hyper_offset_table(ch >> } >> XEN_HYPER_PRI(fp, len, "domain_is_dying: ", buf, flag, >> (buf, "%ld\n", xen_hyper_offset_table.domain_is_dying)); >> - XEN_HYPER_PRI(fp, len, "domain_is_paused_by_controller: ", buf, flag, >> - (buf, "%ld\n", xen_hyper_offset_table.domain_is_paused_by_controller)); >> + if (XEN_HYPER_VALID_MEMBER(domain_is_paused_by_controller)) { >> + XEN_HYPER_PRI(fp, len, "domain_is_paused_by_controller: ", buf, flag, >> + (buf, "%ld\n", xen_hyper_offset_table.domain_is_paused_by_controller)); >> + } >> + if (XEN_HYPER_VALID_MEMBER(domain_controller_pause_count)) { >> + XEN_HYPER_PRI(fp, len, "domain_controller_pause_count: ", buf, flag, >> + (buf, "%ld\n", xen_hyper_offset_table.domain_controller_pause_count)); >> + } >> XEN_HYPER_PRI(fp, len, "domain_is_shutting_down: ", buf, flag, >> (buf, "%ld\n", xen_hyper_offset_table.domain_is_shutting_down)); >> XEN_HYPER_PRI(fp, len, "domain_is_shut_down: ", buf, flag, >> >> >> >> >> >> -- >> Company details: http://ts.fujitsu.com/imprint.html >> >> -- >> Crash-utility mailing list >> Crash-utility(a)redhat.com >> https://www.redhat.com/mailman/listinfo/crash-utility >> > > -- > Crash-utility mailing list > Crash-utility(a)redhat.com > https://www.redhat.com/mailman/listinfo/crash-utility > -- Crash-utility mailing list Crash-utility(a)redhat.com https://www.redhat.com/mailman/listinfo/crash-utility