[Bug 268897] panic: [pmc,4811] Retrieving callchain for thread that doesn't want it
Date: Fri, 13 Jan 2023 23:09:34 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=268897 --- Comment #4 from John F. Carr <jfc@mit.edu> --- The PMC crash on CURRENT in a VM is unrelated to my test program. It happens with /bin/ls: # pmcstat -p instructions ls > /dev/null 2> /tmp/2 panic: [amd,770] PMC0, CPU0 "K8-0" already stopped cpuid = 0 time = 1673651198 KDB: stack backtrace: db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe00c326dc20 vpanic() at vpanic+0x151/frame 0xfffffe00c326dc70 panic() at panic+0x43/frame 0xfffffe00c326dcd0 amd_stop_pmc() at amd_stop_pmc+0x12e/frame 0xfffffe00c326dcf0 pmc_process_exit() at pmc_process_exit+0x26d/frame 0xfffffe00c326dd80 exit1() at exit1+0x36e/frame 0xfffffe00c326ddf0 sys_exit() at sys_exit+0xd/frame 0xfffffe00c326de00 amd64_syscall() at amd64_syscall+0x12e/frame 0xfffffe00c326df30 fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe00c326df30 --- syscall (1, FreeBSD ELF64, exit), rip = 0x2ee9ac03458a, rsp = 0x2ee9a9c13488, rbp = 0x2ee9a9c134a0 --- KDB: enter: panic [ thread pid 62603 tid 106652 ] Stopped at kdb_enter+0x32: movq $0,0x129dc83(%rip) -- You are receiving this mail because: You are the assignee for the bug.