Two possibilities: 1. malloc() doesn't silently return NULL on Darwin when it runs out of memory; it always generates an error message.
2. setrlimit() doesn't work the same on Darwin as it does on Linux, and the test program is hitting a system limit. It so happens that when I first looked at this bug, I ignored the "ulimit -v 1000000" instruction (I have a bad habit of not paying attention), and I let the program do memory allocation forever. It eventually got a segfault deep within malloc(). I was able to reproduce this in C as well as in Fortran. Perhaps something similar happens with Darwin, although at least on Darwin malloc() issues an error, however mysterious, instead of crashing. Two ways to go from here: 1. If anyone can let me ssh into a Darwin system, I can see if I can get this to work. 2. If that's not possible, add a dg-skip-if so that we don't try to run this test on Darwin, since it requires some OS support, and it doesn't just involve Fortran. Louis ---- On Sun, 18 Sep 2016 03:45:38 -0700 Dominique d'Humières<domi...@lps.ens.fr> wrote ---- > > Fixed in revision 240219. > > The test fails on x86_64-apple-darwin15 (at least): > > FAIL: gfortran.dg/pr68078.f90 -O0 output pattern test > FAIL: gfortran.dg/pr68078.f90 -O1 output pattern test > FAIL: gfortran.dg/pr68078.f90 -O2 output pattern test > FAIL: gfortran.dg/pr68078.f90 -O3 -fomit-frame-pointer -funroll-loops > -fpeel-loops -ftracer -finline-functions output pattern test > FAIL: gfortran.dg/pr68078.f90 -O3 -g output pattern test > FAIL: gfortran.dg/pr68078.f90 -Os output pattern test > FAIL: gfortran.dg/pr68078.f90 -g -flto output pattern test > > The failures are > > Output was: > pr68078.exe(37410,0xa381f000) malloc: *** mach_vm_map(size=8388608) failed > (error code=3) > *** error: can't allocate region securely > *** set a breakpoint in malloc_error_break to debug > foo_ptr allocation failed > pr68078.exe(37410,0xa381f000) malloc: *** mach_vm_map(size=8388608) failed > (error code=3) > *** error: can't allocate region securely > *** set a breakpoint in malloc_error_break to debug > foo_obj allocation failed > > Should match: > *foo_ptr allocation failed( > |^M > |^M) *foo_obj allocation failed( > |^M > |^M) *foo_array allocation failed( > |^M > |^M) > > with -O0 > > and > > Output was: > pr68078.exe(39345,0xa381f000) malloc: *** mach_vm_map(size=8388608) failed > (error code=3) > *** error: can't allocate region securely > *** set a breakpoint in malloc_error_break to debug > foo_ptr allocation failed > > Should match: > *foo_ptr allocation failed( > |^M > |^M) *foo_obj allocation failed( > |^M > |^M) *foo_array allocation failed( > |^M > |^M) > > for the other options. > > Dominique > > >
