Date: Mon, 9 May 2016 16:05:44 +0000 (UTC) From: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> To: freebsd-dtrace@freebsd.org Subject: DTrace panic Message-ID: <alpine.BSF.2.00.1605091601260.83904@ai.fobar.qr>
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Hi,
I am seeing this panic when trying to use DTrace on r299073. I
cannot rule out that it's my (experimental) environment; just wanted
to check if it might have been a known breakage before digging into it.
# dtrace -n 'dtrace:::BEGIN { printf("Hello FreeBSD!\n"); }'
dtrace -n 'dtrace:::BEGIN { printf("Hello FreeBSD!\n"); }'
dtrace: description 'dtrace:::BEGIN ' matched 1 probe
kernel trap 12 with interrupts disabled
Fatal trap 12: page fault while in kernel mode
fault virtual address = 0xae
fault code = supervisor read data, page not present
instruction pointer = 0x20:0xfffff800012ebc03
stack pointer = 0x28:0xfffffe0000226740
frame pointer = 0x28:0xfffffe0000226780
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags = IOPL = 0
current process = 576 (dtrace)
[ thread pid 576 tid 100048 ]
Stopped at 0xfffff800012ebc03: addl %eax,(%rax)
db> where
where
Tracing pid 576 tid 100048 td 0xfffff80001f0f000
dmapbase() at 0xfffff800012ebc03/frame 0xfffffe0000226780
dtrace_xcall() at dtrace_xcall+0xb2/frame 0xfffffe00002267d0
dtrace_fuword32() at dtrace_fuword32+0xfd66/frame 0xfffffe0000226830
dtrace_fuword32() at dtrace_fuword32+0xa6ec/frame 0xfffffe0000226930
dev2udev() at dev2udev+0x37ef/frame 0xfffffe0000226990
kern_ioctl() at kern_ioctl+0x1a7/frame 0xfffffe0000226a00
sys_ioctl() at sys_ioctl+0x171/frame 0xfffffe0000226ad0
amd64_syscall() at amd64_syscall+0x4c6/frame 0xfffffe0000226bf0
Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe0000226bf0
--- syscall (54, FreeBSD ELF64, sys_ioctl), rip = 0x80125267a, rsp = 0x7fffffffe9c8, rbp = 0x7fffffffea10 ---
db> show reg
show reg
cs 0x20
ds 0x3b
es 0x3b
fs 0x13
gs 0x1b
ss 0x28
rax 0xae
rcx 0
rdx 0xfffffe0000817000
rbx 0xffffffff802b43f0
rsp 0xfffffe0000226758
rbp 0xfffffe0000226780
rsi 0xffffffff802b43f0
rdi 0xfffff800012ebc00
r8 0xfffff800012ebc00
r9 0xfffff800012ebc00
r10 0xfffff800012ebc00
r11 0xfffffe00002266f8
r12 0xffffffff80429f30 smp_no_rendevous_barrier
r13 0xfffffe0001127000
r14 0xfffff800012ebc00
-More--
r15 0xfffff800012ebc00
rip 0xfffff800012ebc03
rflags 0xae
0xfffff800012ebc03: addl %eax,(%rax)
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