https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85641
kargl at gcc dot gnu.org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2018-05-03
CC| |kargl at gcc dot gnu.org,
| |tkoenig at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #1 from kargl at gcc dot gnu.org ---
This seems to be a problem in the gfc_code_walker() chain.
Note, even if I use -fno-frontend-optimize, I still hit the
problem. If try
gfcx -o z a.f90 -fno-frontend-optimize
and watch for an explosion in memory usage in top I see
last pid: 489; load averages: 0.13, 0.22, 0.18 up 16+00:00:59
16:07:16
68 processes: 1 running, 64 sleeping, 3 stopped
CPU: 0.5% user, 0.1% nice, 0.2% system, 0.0% interrupt, 99.1% idle
Mem: 3977M Active, 12G Inact, 695M Laundry, 2153M Wired, 830M Buf, 12G Free
Swap: 16G Total, 84M Used, 16G Free
PID USERNAME THR PRI NICE SIZE RES STATE C TIME WCPU COMMAND
484 sgk 1 40 0 3280M 3271M STOP 1 0:04 0.00% f951
487 sgk 1 40 0 340M 316M select 2 0:03 0.00% gdb81
suspending the compilation with ^Z and attaching gdb81 to PID 484 gives
#0 memset () at /usr/src/lib/libc/amd64/string/memset.S:51
#1 0x000000020307ae09 in tcache_alloc_small (arena=<optimized out>, size=0,
tsd=<optimized out>, tcache=<optimized out>, binind=<optimized out>,
zero=<optimized out>, slow_path=<optimized out>)
at /usr/src/contrib/jemalloc/include/jemalloc/internal/tcache_inlines.h:117
#2 arena_malloc (tsdn=<optimized out>, size=<optimized out>, zero=255,
tcache=<optimized out>, slow_path=false, arena=<optimized out>,
ind=<optimized out>)
at
/usr/src/contrib/jemalloc/include/jemalloc/internal/arena_inlines_b.h:101
#3 iallocztm (size=<optimized out>, zero=255, tcache=<optimized out>,
is_internal=false, slow_path=false, tsdn=<optimized out>,
ind=<optimized out>, arena=<optimized out>)
at
/usr/src/contrib/jemalloc/include/jemalloc/internal/jemalloc_internal_inlines_c.h:33
#4 imalloc_no_sample (tsd=<optimized out>, size=<optimized out>, usize=3072,
sopts=<optimized out>, dopts=<optimized out>, ind=<optimized out>)
at jemalloc_jemalloc.c:1654
#5 imalloc_body (tsd=<optimized out>, sopts=<optimized out>,
dopts=<optimized out>) at jemalloc_jemalloc.c:1850
#6 imalloc (sopts=<optimized out>, dopts=<optimized out>)
at jemalloc_jemalloc.c:1950
#7 __calloc (num=<optimized out>, num@entry=1, size=<optimized out>,
size@entry=2680) at jemalloc_jemalloc.c:2064
#8 0x000000000160ca11 in xcalloc (nelem=nelem@entry=1,
elsize=elsize@entry=2680) at ../../gcc/libiberty/xmalloc.c:162
#9 0x000000000080b57d in gfc_get_namespace (parent=parent@entry=0x203caf000,
parent_types=parent_types@entry=1) at ../../gcc/gcc/fortran/symbol.c:2824
#10 0x00000000007d1c93 in gfc_build_block_ns(gfc_namespace*) ()
at ../../gcc/gcc/fortran/parse.c:4429
#11 0x00000000008a884f in insert_block ()
at ../../gcc/gcc/fortran/frontend-passes.c:673
#12 0x00000000008a8cca in insert_block ()
at ../../gcc/gcc/fortran/frontend-passes.c:644
#13 create_var(gfc_expr*, char const*) ()
at ../../gcc/gcc/fortran/frontend-passes.c:728
#14 0x00000000008a9190 in realloc_string_callback (c=0x2ca244808,
walk_subtrees=<optimized out>, data=<optimized out>)
at ../../gcc/gcc/fortran/frontend-passes.c:291
#15 0x00000000008ad2ca in gfc_code_walker (c=0x2ca244808,
codefn=codefn@entry=0x8a90d0 <realloc_string_callback(gfc_code**, int*,
void *)>,
exprfn=exprfn@entry=0x8a6eb0 <dummy_expr_callback(gfc_expr**, int*,
void*)>, data=data@entry=0x0) at ../../gcc/gcc/fortran/frontend-passes.c:4569
#16 0x00000000008ad88d in gfc_code_walker (c=0x2ca243c08,
codefn=codefn@entry=0x8a90d0 <realloc_string_callback(gfc_code**, int*,
void*)>,
exprfn=exprfn@entry=0x8a6eb0 <dummy_expr_callback(gfc_expr**, int*,
void*)>, data=data@entry=0x0) at ../../gcc/gcc/fortran/frontend-passes.c:4593
#17 0x00000000008ad88d in gfc_code_walker (c=0x2ca243008,
codefn=codefn@entry=0x8a90d0 <realloc_string_callback(gfc_code**, int*,
void*)>,
exprfn=exprfn@entry=0x8a6eb0 <dummy_expr_callback(gfc_expr**, int*,
void*)>, data=data@entry=0x0) at ../../gcc/gcc/fortran/frontend-passes.c:4593
#18 0x00000000008ad88d in gfc_code_walker (c=0x2ca242408,
codefn=codefn@entry=0x8a90d0 <realloc_string_callback(gfc_code**, int*,
void
There are an additional 12 frames
#31 0x00000000008ad88d in gfc_code_walker (c=0x2ca231808,
codefn=codefn@entry=0x8a90d0 <realloc_string_callback(gfc_code**, int*,
void*)>,
exprfn=exprfn@entry=0x8a6eb0 <dummy_expr_callback(gfc_expr**, int*,
void*)>, data=data@entry=0x0) at ../../gcc/gcc/fortran/frontend-passes.c:4593
