Experimental Physics and
Industrial Control System

Can you extract the command line and run it by hand?
(Just trying to be helpful. Michael already asked for the core file)
Otherwise you may be able to run the compiler under gdb ?!?


On 07/03/17 15:32, Benjamin Franksen wrote:

During development of the sequencer it may happen that the SNL compiler
(snc) crashes with a segmentation fault. With 3.14 this looks like

franksen@tiber: ...test/validate/O.linux-x86 > rm wait.*
franksen@tiber: ...test/validate/O.linux-x86 > make
make -f ../Makefile TOP=../../.. T_A=linux-x86  all
make[1]: Entering directory
`/home/franksen/src/seq/branch-2-3/home/test/validate/O.linux-x86'
perl /home/franksen/src/epics-base/3.14/bin/linux-x86/mkmf.pl -m
wait.st.d  .  ../os/Linux ../os/posix ../os/default ..  wait.i ../wait.st
make[1]: Leaving directory
`/home/franksen/src/seq/branch-2-3/home/test/validate/O.linux-x86'
make[1]: Entering directory
`/home/franksen/src/seq/branch-2-3/home/test/validate/O.linux-x86'
preprocessing ../wait.st
/usr/bin/gcc -x c -E  -D_GNU_SOURCE -D_DEFAULT_SOURCE            -D_X86_
 -DUNIX  -Dlinux   -I. -I../O.Common -I. -I..
-I../../../include/os/Linux -I../../../include
-I/home/franksen/src/epics-base/3.14/include/os/Linux
-I/home/franksen/src/epics-base/3.14/include        ../wait.st > wait.i
compiling wait.i to C
/home/franksen/src/seq/branch-2-3/home/bin/linux-x86/snc   +m  wait.i -o
wait.c.tmp
make[1]: *** [wait.c] Segmentation fault (core dumped)
make[1]: Leaving directory
`/home/franksen/src/seq/branch-2-3/home/test/validate/O.linux-x86'
make: *** [all] Error 2
franksen@tiber: ...test/validate/O.linux-x86 > ll wait.*
-rw-rw-r-- 1 franksen franksen    0 Mär  7 15:14 wait.c.tmp
-rw-rw-r-- 1 franksen franksen 1707 Mär  7 15:14 wait.i
-rw-rw-r-- 1 franksen franksen   84 Mär  7 15:14 wait.st.d


Note the line

make[1]: *** [wait.c] Segmentation fault (core dumped)

in the make output. Now with 3.15:

rm wait.*

franksen@tiber: ...test/validate/O.linux-x86 > make
make -f ../Makefile TOP=../../.. T_A=linux-x86  all
make[1]: Entering directory
`/home/franksen/src/seq/branch-2-3/home/test/validate/O.linux-x86'
compiling waitfun.i to C
/home/franksen/src/seq/branch-2-3/home/bin/linux-x86/snc   +m  waitfun.i
-o waitfun.c.tmp
preprocessing ../wait.st
/usr/bin/gcc -x c -E  -D_GNU_SOURCE -D_DEFAULT_SOURCE            -D_X86_
 -DUNIX  -Dlinux   -I. -I../O.Common -I. -I. -I..
-I../../../include/compiler/gcc -I../../../include/os/Linux
-I../../../include
-I/home/franksen/src/epics-base/3.15/include/compiler/gcc
-I/home/franksen/src/epics-base/3.15/include/os/Linux
-I/home/franksen/src/epics-base/3.15/include        ../wait.st > wait.i
compiling wait.i to C
/home/franksen/src/seq/branch-2-3/home/bin/linux-x86/snc   +m  wait.i -o
wait.c.tmp
perl -CSD /home/franksen/src/epics-base/3.15/bin/linux-x86/mkmf.pl -m
wait.st.d  .  ../compiler/gcc ../compiler/default .  ../os/Linux
../os/posix ../os/default ..  wait.i ../wait.st
make[1]: Leaving directory
`/home/franksen/src/seq/branch-2-3/home/test/validate/O.linux-x86'
make[1]: Entering directory
`/home/franksen/src/seq/branch-2-3/home/test/validate/O.linux-x86'
compiling waitfun.i to C
/home/franksen/src/seq/branch-2-3/home/bin/linux-x86/snc   +m  waitfun.i
-o waitfun.c.tmp
compiling wait.i to C
/home/franksen/src/seq/branch-2-3/home/bin/linux-x86/snc   +m  wait.i -o
wait.c.tmp
make[1]: Leaving directory
`/home/franksen/src/seq/branch-2-3/home/test/validate/O.linux-x86'
make: *** [all] Error 2
franksen@tiber: ...test/validate/O.linux-x86 > ll wait.*
-rw-rw-r-- 1 franksen franksen    0 Mär  7 15:24 wait.c.tmp
-rw-rw-r-- 1 franksen franksen 1707 Mär  7 15:24 wait.i
-rw-rw-r-- 1 franksen franksen   47 Mär  7 15:24 wait.st.d

Note: nothing about seg faults or dumped cores in the make output here.

I have not the slightest idea what could cause this.

I have checked (a) the environment (b) the MAKEFLAGS and (c) the command
line that invokes snc. They are exactly the same (apart from the
variable EPICS_BASE in the environment).

Cheers
Ben
--
"Make it so they have to reboot after every typo." ― Scott Adams

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