Sorry folks for this shitty report, but i thought it's maybe
better to send it out than not to be able to sleep or so.
I guess it's somehow related to the rthread wait4() path, but of
course i dunno. Here's what's happened:
As always i did my weekly kernel+userland compilation this noon,
and i was running in an endless loop in wait4() when compiling
insn-attrtab.i (thought preprocessor hung, but it's later).
Note i (yet) use(d) a very primitive compilation approach
- i simply do 'make all', which sometimes requires changes by hand
(e.g. today drop of SO_JUMBO in kdump). *This* is only a fellow
traveler virtual box, and doing the full rebuild blocks normal
work out some hours longer, so..
I had not yet time to check this on a real box.
Anyway, kernel compilation was successful, and (after reboot) much
of userland (e.g. libC, crypto etc. - one week of work), too.
But then i ran in an endless (busy) wait4() upon compilation of
gnu/usr.bin/cc/cc_int/obj/insn-attrtab:
68 -rw--- 1 steffen wsrc 68981 Mar 19 16:34 ktrace.out
1844 gcc NAMI /usr/lib/gcc-lib/amd64-unknown-openbsd5.1/4.2.1/cc1
1844 gcc RET access 0
1844 gcc CALL sigprocmask(SIG_BLOCK,~0)
1844 gcc RET sigprocmask 0
1844 gcc CALL mprotect(0x72f000,0x2000,0x3PROT_READ|PROT_WRITE)
1844 gcc RET mprotect 0
1844 gcc CALL mprotect(0x72f000,0x2000,0x1PROT_READ)
1844 gcc RET mprotect 0
1844 gcc CALL sigprocmask(SIG_SETMASK,0)
1844 gcc RET sigprocmask ~0x10100SIGKILL|SIGSTOP
1844 gcc CALL vfork()
1844 gcc RET vfork 24913/0x6151
1844 gcc CALL sigprocmask(SIG_BLOCK,~0)
1844 gcc RET sigprocmask 0
1844 gcc CALL mprotect(0x72f000,0x2000,0x3PROT_READ|PROT_WRITE)
1844 gcc RET mprotect 0
1844 gcc CALL mprotect(0x72f000,0x2000,0x1PROT_READ) 1844 gcc
RET mprotect 0
1844 gcc CALL sigprocmask(SIG_SETMASK,0)
1844 gcc RET sigprocmask ~0x10100SIGKILL|SIGSTOP
1844 gcc CALL sigprocmask(SIG_BLOCK,~0)
1844 gcc RET sigprocmask 0
1844 gcc CALL mprotect(0x20c61,0x2000,0x3PROT_READ|PROT_WRITE)
1844 gcc RET mprotect 0
1844 gcc CALL mprotect(0x20c61,0x2000,0x1PROT_READ)
1844 gcc RET mprotect 0
1844 gcc CALL sigprocmask(SIG_SETMASK,0)
1844 gcc RET sigprocmask ~0x10100SIGKILL|SIGSTOP
1844 gcc CALL wait4(0x6151,0x208e980d0,0,0)
ENDLESS BUSY LOOP, ^C HERE
1844 gcc PSIG SIGINT caught handler=0x40b210 mask=0
1844 gcc RET wait4 RESTART
1844 gcc CALL sigaction(SIGINT,0x7f7f0e10,0x7f7f0e00)
I've moved the fresh libC to /usr/lib, but that results in the
very same problem. Ditto last week's kernel.
Puke! I had to run a debugger :-((:
(gdb) break vfork
Breakpoint 1 at 0x401a50
(gdb) run
Starting program: /usr/bin/gcc -O2 -DIN_GCC -DHAVE_CONFIG_H -DPREFIX=/usr
-I/home/src/gnu/usr.bin/cc/cc_int/obj/../cc_tools
-I/home/src/gnu/usr.bin/cc/cc_int/../cc_tools
-I/home/src/gnu/usr.bin/cc/cc_int/../../../gcc/gcc
-I/home/src/gnu/usr.bin/cc/cc_int/../../../gcc/gcc/config
-I/home/src/gnu/usr.bin/cc/cc_int/../../../gcc/include
-I/home/src/gnu/usr.bin/cc/cc_int/../../../gcc/libcpp/include
-I/home/src/gnu/usr.bin/cc/cc_int/../../../gcc/libdecnumber -c
../cc_tools/insn-attrtab.c -o insn-attrtab.o.o
Breakpoint 1 at 0x2088b0f90
Breakpoint 1, 0x0002088b0f90 in vfork () from /usr/lib/libc.so.62.0
(gdb) step
Single stepping until exit from function vfork,
which has no line number information.
gcc: Internal error: Trace/BPT trap (program cc1)
Please submit a full bug report.
See URL:http://gcc.gnu.org/bugs.html for instructions.
Program exited with code 01.
The old libc.so.62.0 is from monday last week, the new from today.
I'll append a dmesg of this VirtualBox.
Well; unless there is interest in something i'll do a complete
cleanup and recompile tomorrow.
I would report if the problem remains, then.
(I use my own homebrew environment since a decade, and have no
experiences with - spew - debuggers. Just for info.)
--steffen
Forza Figa!
OpenBSD 5.1-current (GENERIC) #13: Mon Mar 19 12:13:01 CET 2012
sdaoden@obsd.sherwood:/home/src/sys/arch/amd64/compile/GENERIC
real mem = 133103616 (126MB)
avail mem = 107405312 (102MB)
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.5 @ 0xe1000 (5 entries)
bios0: vendor innotek GmbH version VirtualBox date 12/01/2006
bios0: innotek GmbH VirtualBox
acpi0 at bios0: rev 2
acpi0: sleep states S0 S5
acpi0: tables DSDT FACP APIC SSDT
acpi0: wakeup devices
acpitimer0 at acpi0: 3579545 Hz, 32 bits
acpimadt0 at acpi0 addr 0xfee0: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Core(TM)2 Duo CPU P7550 @ 2.26GHz, 1974.41 MHz
cpu0:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,SSE3,MWAIT,SSSE3,NXE,LONG,LAHF
cpu0: 3MB 64b/line 8-way L2 cache
cpu0: apic clock running
