Preparing for the next release: call for testing

Mike Frysinger vapier at gentoo.org
Mon Dec 14 20:45:40 UTC 2015 

On 11 Dec 2015 06:30, Dmitry V. Levin wrote:
> On Thu, Dec 10, 2015 at 09:37:35PM -0500, Mike Frysinger wrote:
> > i haven't had a chance yet to triage these.
> > 
> > testing commit bab4ef4272cd2596c7390b34ea8acc086ee8fdb2 (v4.10-566-gbab4ef4)
> > 
> > native (build+tests):
> > vFAIL:  build;  x86_64  ???         linux-4.1.6         kernel-headers-3.4.0   glibc-2.4   gcc-4.5.4
> > vFAIL:  build;  sparc64  ???  cross  kernel-headers-4.3.0  glibc-2.22  gcc-4.6.4
> > ./mpers.sh: line 21: 18442 Killed                  gawk -v VAR_NAME="$VAR_NAME" -v ARCH_FLAG="${ARCH_FLAG#-}" -f "$MPERS_AWK" "${f_d2}" > "${f_h}"
> 
> Was it an OOM killer in both cases?

the older version of gawk used seems to be unhappy with the script.
when i run the command manually:
$ gawk -v VAR_NAME=mpers_target_var -v ARCH_FLAG=m32 -f ./mpers.awk mpers-m32/kernel_dirent.d2
#include <inttypes.h>
typedef
Killed

running it through strace shows that it keeps increasing the heap until it OOMs:
...
brk(0x9524e000)                         = 0x9524e000
brk(0x9526f000)                         = 0x9526f000
brk(0x95291000)                         = 0x95291000
brk(0x952b2000)                         = 0x952b2000
brk(0x952d4000)                         = 0x952d4000
brk(0x952f5000)                         = 0x952f5000
...

adding some debug statements to the script shows it gets into infinite recursion
with the what_is function:
#include <inttypes.h>
typedef
what_is( 0x79 )
type_idx = {  }
special = { typedef }
what_is(  )
type_idx = {  }
special = {  }
what_is(  )
...repeats blank lookups forever...

this is gawk-4.0.1, so i suspect you should be able to reproduce by installing
that version locally.  i'm attaching the mpers-m32/kernel_dirent.d2 in case it
helps.

> > vFAIL:  test;   armv7l  32-bit/LSB  linux-3.4.0-vapier  kernel-headers-3.18.0  glibc-2.21  gcc-4.9.3
> > Segmentation fault
> > inet-cmsg.test: failed test: ./inet-cmsg failed
> 
> tests/inet-cmsg.c sagfaulted, need more info.

yikes, this looks like a kernel bug :).  i'll try a newer one on that system
(i've got a 3.8 upgrade pending already).
[    0.000000] Unable to handle kernel NULL pointer dereference at virtual address 00000080
[    0.000000] pgd = ec708000
[   80.000000] *pgd=41dcc831, *pte=00000000, *ppte=00000000
[    0.000000] Internal error: Oops: 17 [#9] SMP ARM
...
[    0.000000] PC is at ip_options_echo+0x4c/0x410
[    0.000000] LR is at ip_options_echo+0x28/0x410
...
[    0.000000] [<80383ee8>] (ip_options_echo+0x4c/0x410) from [<80387e38>] (ip_cmsg_recv+0x1c8/0x204)
[    0.000000] [<80387e38>] (ip_cmsg_recv+0x1c8/0x204) from [<803a7e70>] (udp_recvmsg+0x334/0x374)
[    0.000000] [<803a7e70>] (udp_recvmsg+0x334/0x374) from [<803afe7c>] (inet_recvmsg+0x94/0xac)
[    0.000000] [<803afe7c>] (inet_recvmsg+0x94/0xac) from [<8034b160>] (sock_recvmsg+0xb0/0xd0)
[    0.000000] [<8034b160>] (sock_recvmsg+0xb0/0xd0) from [<8034c040>] (__sys_recvmsg+0x110/0x1c8)
[    0.000000] [<8034c040>] (__sys_recvmsg+0x110/0x1c8) from [<8034d1d0>] (sys_recvmsg+0x4c/0x78)
[    0.000000] [<8034d1d0>] (sys_recvmsg+0x4c/0x78) from [<8000e580>] (ret_fast_syscall+0x0/0x30)
[    0.000000] Code: e5d63022 e3c22001 e5969080 e3530000 (e5922080) 
...

> > vFAIL:  test;   x86_64  32-bit/LSB  linux-4.1.6         kernel-headers-4.1.0   glibc-2.21  gcc-4.9.2
> > < times({tms_utime=22, tms_stime=17, tms_cutime=33, tms_cstime=26}) = 18446744071580810102
> > ---
> > > times({tms_utime=22, tms_stime=17, tms_cutime=33, tms_cstime=26}) = 2166225782
> 
> Looks like a sign extension bug in libc.
> Is there any safe way on x32 to call times(2) directly?

time_t/clock_t/unsigned long long are 64bit in x32.

looks like strace doesn't like it when you call clock_gettime:
strace: syscall_228(...) in unsupported 64-bit mode of process PID=2565

which doesn't make sense as they're the same syscall for x86_64 and x32.
-mike
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<1><79>
Abbrev Number: 10 (DW_TAG_typedef)
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Contents of the .debug_types section:

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