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eeeaf705fe
Lots of memory used in gas should go on this obstack. The patch also frees all the gas obstacks on exit, which isn't a completely trivial task. * subsegs.c (alloc_seginfo): New function. (subseg_change, subseg_get): Use it. (subsegs_end): New function. * as.h (subsegs_end): Declare. * output-file.c: Include subsegs.h (stash_frchain_obs): New function. (output_file_close): Save obstacks attached to output bfd before closing. Call subsegs_end with the array of obstacks.
105 lines
3.0 KiB
C
105 lines
3.0 KiB
C
/* output-file.c - Deal with the output file
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Copyright (C) 1987-2022 Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#include "as.h"
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#include "subsegs.h"
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#include "output-file.h"
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#ifndef TARGET_MACH
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#define TARGET_MACH 0
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#endif
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bfd *stdoutput;
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void
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output_file_create (const char *name)
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{
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if (name[0] == '-' && name[1] == '\0')
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as_fatal (_("can't open a bfd on stdout %s"), name);
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else if (!(stdoutput = bfd_openw (name, TARGET_FORMAT)))
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{
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bfd_error_type err = bfd_get_error ();
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if (err == bfd_error_invalid_target)
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as_fatal (_("selected target format '%s' unknown"), TARGET_FORMAT);
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else
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as_fatal (_("can't create %s: %s"), name, bfd_errmsg (err));
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}
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bfd_set_format (stdoutput, bfd_object);
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bfd_set_arch_mach (stdoutput, TARGET_ARCH, TARGET_MACH);
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if (flag_traditional_format)
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stdoutput->flags |= BFD_TRADITIONAL_FORMAT;
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}
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static void
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stash_frchain_obs (asection *sec)
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{
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segment_info_type *info = seg_info (sec);
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if (info)
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{
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struct frchain *frchp;
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for (frchp = info->frchainP; frchp; frchp = frchp->frch_next)
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obstack_ptr_grow (¬es, &frchp->frch_obstack);
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info->frchainP = NULL;
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}
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}
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void
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output_file_close (const char *filename)
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{
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bool res;
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bfd *obfd = stdoutput;
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struct obstack **obs;
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asection *sec;
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if (obfd == NULL)
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return;
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/* Prevent an infinite loop - if the close failed we will call as_fatal
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which will call xexit() which may call this function again... */
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stdoutput = NULL;
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/* We can't free obstacks attached to the output bfd sections before
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closing the output bfd since data in those obstacks may need to
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be accessed, but we can't access anything in the output bfd after
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it is closed.. */
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for (sec = obfd->sections; sec; sec = sec->next)
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stash_frchain_obs (sec);
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stash_frchain_obs (reg_section);
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stash_frchain_obs (expr_section);
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stash_frchain_obs (bfd_abs_section_ptr);
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stash_frchain_obs (bfd_und_section_ptr);
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obstack_ptr_grow (¬es, NULL);
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obs = obstack_finish (¬es);
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/* Close the bfd. */
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if (!flag_always_generate_output && had_errors ())
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res = bfd_cache_close_all ();
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else
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res = bfd_close (obfd);
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subsegs_end (obs);
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if (! res)
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as_fatal ("%s: %s", filename, bfd_errmsg (bfd_get_error ()));
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}
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