Re: [PATCH, committed]: Zone collector

[Andreas Jaeger <aj at suse dot de>]

I tried to bootstrapp on x86_64-linux-gnu using --with-gc=zone and
full checking (including GCAC) and get this ICE:

./xgcc -B./ -B/opt/gcc/3.4-devel/x86_64-suse-linux-gnu/bin/ -isystem /opt/gcc/3.4-devel/x86_64-suse-linux-gnu/include -isystem /opt/gcc/3.4-devel/x86_64-suse-linux-gnu/sys-include -L/abuild/aj/builds/gcc/misc/gcc/../ld -O2 -DIN_GCC    -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -isystem ./include  -I. -I. -I/usr/src/aj/cvs/gcc/gcc -I/usr/src/aj/cvs/gcc/gcc/. -I/usr/src/aj/cvs/gcc/gcc/../include   -g0 -finhibit-size-directive -fno-inline-functions -fno-exceptions -fno-zero-initialized-in-bss -fno-unit-at-a-time -fno-omit-frame-pointer -fno-asynchronous-unwind-tables \
   -c /usr/src/aj/cvs/gcc/gcc/crtstuff.c -DCRT_END \
  -o crtend.o
In file included from /usr/src/aj/cvs/gcc/gcc/tsystem.h:89,
                 from /usr/src/aj/cvs/gcc/gcc/crtstuff.c:62:
/usr/include/stdlib.h:394: internal compiler error: in sweep_pages, at ggc-zone.c:1333
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://gcc.gnu.org/bugs.html> for instructions.
make: *** [crtend.o] Error 1

Running gdb gives some more insight:

(gdb) r -fpreprocessed crtstuff.i -quiet -dumpbase crtstuff.c -mtune=k8 -auxbase-strip crtend.o -g0 -O2 -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -version -finhibit-size-directive -fno-inline-functions -fno-exceptions -fno-zero-initialized-in-bss -fno-unit-at-a-time -fno-omit-frame-pointer -fno-asynchronous-unwind-tables -o crtstuff.s
Starting program: /abuild/aj/builds/gcc/misc/gcc/cc1 -fpreprocessed crtstuff.i -quiet -dumpbase crtstuff.c -mtune=k8 -auxbase-strip crtend.o -g0 -O2 -W -Wall -Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -version -finhibit-size-directive -fno-inline-functions -fno-exceptions -fno-zero-initialized-in-bss -fno-unit-at-a-time -fno-omit-frame-pointer -fno-asynchronous-unwind-tables -o crtstuff.s
Breakpoint 2 at 0x2a9569fc30
Breakpoint 3 at 0x2a9569ed00
GNU C version 3.4 20031027 (experimental) (x86_64-suse-linux-gnu)
        compiled by GNU C version 3.3.1 (SuSE Linux).
GGC heuristics: --param ggc-min-expand=0 --param ggc-min-heapsize=0

Breakpoint 1, fancy_abort (file=0xf98440 "/usr/src/aj/cvs/gcc/gcc/ggc-zone.c", line=1333, function=0xf984c1 "sweep_pages")
    at /usr/src/aj/cvs/gcc/gcc/diagnostic.c:584
584       internal_error ("in %s, at %s:%d", function, trim_filename (file), line);
(gdb) bt
#0  fancy_abort (file=0xf98440 "/usr/src/aj/cvs/gcc/gcc/ggc-zone.c", line=1333, function=0xf984c1 "sweep_pages")
    at /usr/src/aj/cvs/gcc/gcc/diagnostic.c:584
#1  0x0000000000c8bfd8 in sweep_pages (zone=0x11895a0) at /usr/src/aj/cvs/gcc/gcc/ggc-zone.c:1333
#2  0x0000000000c8c2a0 in ggc_collect_1 (zone=0x11895a0, need_marking=true) at /usr/src/aj/cvs/gcc/gcc/ggc-zone.c:1401
#3  0x0000000000c8c3f9 in ggc_collect () at /usr/src/aj/cvs/gcc/gcc/ggc-zone.c:1472
#4  0x00000000004029f6 in yyparse () at c-parse.y:295
#5  0x000000000040d94c in c_parse_file () at c-parse.y:2834
#6  0x000000000047f827 in c_common_parse_file (set_yydebug=0) at /usr/src/aj/cvs/gcc/gcc/c-opts.c:1226
#7  0x0000000000c3599a in compile_file () at /usr/src/aj/cvs/gcc/gcc/toplev.c:1836
#8  0x0000000000c3abb7 in do_compile () at /usr/src/aj/cvs/gcc/gcc/toplev.c:4689
#9  0x0000000000c3ac4f in toplev_main (argc=26, argv=0x7fbfffeec8) at /usr/src/aj/cvs/gcc/gcc/toplev.c:4729
#10 0x00000000004a76cb in main (argc=26, argv=0x7fbfffeec8) at /usr/src/aj/cvs/gcc/gcc/main.c:35
(gdb) up
#1  0x0000000000c8bfd8 in sweep_pages (zone=0x11895a0) at /usr/src/aj/cvs/gcc/gcc/ggc-zone.c:1333
1333                    abort ();
(gdb) p p
$1 = (page_entry *) 0x123c130
(gdb) p *p
$2 = {next = 0x123c0f0, bytes = 4096, survived = 2, page = 0x2a95a2e000 "", bytes_free = 6990, context_depth = 0, large_p = false, 
  zone = 0x11895a0}


Andreas
-- 
 Andreas Jaeger, aj@suse.de, http://www.suse.de/~aj
  SuSE Linux AG, Deutschherrnstr. 15-19, 90429 Nürnberg, Germany
   GPG fingerprint = 93A3 365E CE47 B889 DF7F  FED1 389A 563C C272 A126

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