From: David Ahern Date: Mon, 2 Jul 2012 15:12:57 +0000 (-0600) Subject: perf kvm: Fix segfault with report and mixed guestmount use X-Git-Tag: v3.5-rc7~7^3~1 X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7ed97ad41ffa94040dfd593948962a7e9e7b0db9;p=pandora-kernel.git perf kvm: Fix segfault with report and mixed guestmount use Using the guestmount option on record: $ perf kvm --guest --host --guestmount=/tmp/guest-mount record -ag But not the subsequent report: $ perf kvm report causes a SEGFAULT in the usual place: (gdb) bt 0 0x0000000000470356 in machine__mmap_name (self=0x0, bf=0x7fffffffbdb0 " z\370\367\377\177", size= 4096) at util/map.c:712 1 0x00000000004453e8 in perf_event__process_kernel_mmap (tool=0x7fffffffde10, event=0x7ffff7f87e38, machine=0x0) at util/event.c:550 2 0x00000000004458c9 in perf_event__process_mmap (tool=0x7fffffffde10, event=0x7ffff7f87e38, sample= 0x7fffffffd2a0, machine=0x0) at util/event.c:656 3 0x00000000004733e0 in perf_session_deliver_event (session=0x91aca0, event=0x7ffff7f87e38, sample= 0x7fffffffd2a0, tool=0x7fffffffde10, file_offset=7736) at util/session.c:979 ... The MMAP events in this case already contain the full path to the module. No need to require it for the report path to. Signed-off-by: David Ahern Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Jiri Olsa Cc: Namhyung Kim Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1341241977-71535-1-git-send-email-dsahern@gmail.com Signed-off-by: Arnaldo Carvalho de Melo --- Reading git-diff-tree failed