Running gs causes segfault on Linux/ppc

[michaelrsweet]

Version: 8.15rc1
CUPS.org User: arekm.pld-linux

(gdb) r
Starting program: /usr/bin/gs
ESP Ghostscript 815.00 (2005-02-08)
Copyright (C) 2004 artofcode LLC, Benicia, CA. All rights reserved.
This software comes with NO WARRANTY: see the file PUBLIC for details.

Program received signal SIGSEGV, Segmentation fault.
0x100f9c60 in gc_objects_clear_marks (cp=0x1063b9f0) at src/igc.c:582
582 struct_proc_clear_marks((*proc)) =
(gdb) bt
#0 0x100f9c60 in gc_objects_clear_marks (cp=0x1063b9f0) at src/igc.c:582
#1 0x100f8d78 in gs_gc_reclaim (pspaces=0x10655400, global=1) at src/igc.c:263
#2 0x10170040 in context_reclaim (pspaces=0x10655400, global=1) at src/zcontext.c:286
#3 0x100bdcd0 in gs_vmreclaim (dmem=0x106553fc, global=1) at src/ireclaim.c:156
#4 0x100bd960 in ireclaim (dmem=0x106553fc, space=8) at src/ireclaim.c:78
#5 0x100b6c70 in interp_reclaim (pi_ctx_p=0x104dc0f0, space=8) at src/interp.c:418
#6 0x100b709c in gs_call_interp (pi_ctx_p=0x104dc0f0, pref=0x7fffe740, user_errors=1, pexit_code=0x7fffe978,

perror_object=0x7fffe980) at src/interp.c:516

#7 0x100b6d40 in gs_interpret (pi_ctx_p=0x104dc0f0, pref=0x7fffe740, user_errors=1, pexit_code=0x7fffe978,

perror_object=0x7fffe980) at src/interp.c:445

#8 0x100a9944 in gs_main_interpret (minst=0x104dbeec, pref=0x7fffe798, user_errors=1, pexit_code=0x7fffe978,

perror_object=0x7fffe980) at src/imain.c:297

#9 0x100aa430 in gs_run_init_file (minst=0x104dbeec, pexit_code=0x7fffe978, perror_object=0x7fffe980) at src/imain.c:531
#10 0x100a9ad0 in gs_main_init2 (minst=0x104dbeec) at src/imain.c:346
#11 0x100ac06c in gs_main_init_with_args (minst=0x104dbeec, argc=1, argv=0x7ffff374) at src/imainarg.c:258
#12 0x10004db8 in main (argc=1, argv=0x7ffff374) at src/gs.c:45

(gdb) l
45 int code = gs_main_init_with_args(minst, argc, argv);
46
47 #ifdef RUN_STRINGS
48 { /* Run a list of strings (for testing). _/
49 const char *_pstr = run_strings;
50
51 for (; *pstr; ++pstr) {
52 int exit_code;
53 ref error_object;
54 int code;
gdb) frame 0
#0 0x100f9c60 in gc_objects_clear_marks (cp=0x1063b9f0) at src/igc.c:582

582 struct_proc_clear_marks((_proc)) =
(gdb) l
577 gc_objects_clear_marks(chunk_t * cp)
578 {
579 if_debug_chunk('6', "[6]unmarking chunk", cp);
580 SCAN_CHUNK_OBJECTS(cp)
581 DO_ALL
582 struct_proc_clear_marks((_proc)) =
583 pre->o_type->clear_marks;
584 #ifdef DEBUG
585 if (pre->o_type != &st_free)
586 debug_check_object(pre, cp, NULL);
(gdb) print proc
$3 = (void (*)(void *, uint, const gs_memory_struct_type_t *)) 0x100fbab0 <refs_clear_marks>
(gdb) print *proc
$4 = {void (void *, uint, const gs_memory_struct_type_t *)} 0x100fbab0 <refs_clear_marks>

[michaelrsweet]

CUPS.org User: arekm.pld-linux

Working and tested fix is:
http://cvs.pld-linux.org/cgi-bin/cvsweb/SOURCES/ghostscript-esp-align.patch?rev=1.1
With it gs no longer segfaults on my linux/ppc.

Issue is described here (see bugs marked as duplicate of this one)
http://bugs.ghostscript.com/show_bug.cgi?id=687643

[michaelrsweet]

CUPS.org User: mike

Fixed in Subversion repository.