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8268c77870
This commit eliminates make_cleanup_obstack_free, replacing it with a new auto_obstack type that inherits obstack to add cdtors. These changes in the parsers may not be obvious: - obstack_init (&name_obstack); - make_cleanup_obstack_free (&name_obstack); + name_obstack.clear (); Here, the 'name_obstack' variable is a global. The change means that the obstack's contents from a previous parse will stay around until the next parsing starts. I.e., memory won't be reclaimed until then. I don't think that's a problem, these objects don't really grow much at all. The other option I tried was to add a separate type that is like auto_obstack but manages an external obstack, just for those cases. I like the current approach better as that other approach adds more boilerplate and yet another type to learn. gdb/ChangeLog: 2017-06-27 Pedro Alves <palves@redhat.com> * c-exp.y (name_obstack): Now an auto_obstack. (yylex): Use auto_obstack::clear. (c_parse): Use auto_obstack::clear instead of reinitializing and freeing the obstack. * c-lang.c (evaluate_subexp_c): Use auto_obstack. * d-exp.y (name_obstack): Now an auto_obstack. (yylex): Use auto_obstack::clear. (d_parse): Use auto_obstack::clear instead of reinitializing and freeing the obstack. * dwarf2loc.c (fetch_const_value_from_synthetic_pointer): Use auto_obstack. * dwarf2read.c (create_addrmap_from_index) (dwarf2_build_psymtabs_hard) (update_enumeration_type_from_children): Likewise. * gdb_obstack.h (auto_obstack): New type. * go-exp.y (name_obstack): Now an auto_obstack. (build_packaged_name): Use auto_obstack::clear. (go_parse): Use auto_obstack::clear instead of reinitializing and freeing the obstack. * linux-tdep.c (linux_make_mappings_corefile_notes): Use auto_obstack. * printcmd.c (printf_wide_c_string, ui_printf): Use auto_obstack. * rust-exp.y (work_obstack): Now an auto_obstack. (rust_parse, rust_lex_tests): Use auto_obstack::clear instead of reinitializing and freeing the obstack. * utils.c (do_obstack_free, make_cleanup_obstack_free): Delete. (host_char_to_target): Use auto_obstack. * utils.h (make_cleanup_obstack_free): Delete declaration. * valprint.c (generic_emit_char, generic_printstr): Use auto_obstack.
82 lines
2.8 KiB
C
82 lines
2.8 KiB
C
/* Obstack wrapper for GDB.
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Copyright (C) 2002-2017 Free Software Foundation, Inc.
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This file is part of GDB.
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This program 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 of the License, or
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(at your option) any later version.
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This program 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 this program. If not, see <http://www.gnu.org/licenses/>. */
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#if !defined (GDB_OBSTACK_H)
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#define GDB_OBSTACK_H 1
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#include "obstack.h"
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/* Utility macros - wrap obstack alloc into something more robust. */
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#define OBSTACK_ZALLOC(OBSTACK,TYPE) \
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((TYPE *) memset (obstack_alloc ((OBSTACK), sizeof (TYPE)), 0, sizeof (TYPE)))
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#define OBSTACK_CALLOC(OBSTACK,NUMBER,TYPE) \
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((TYPE *) memset (obstack_alloc ((OBSTACK), (NUMBER) * sizeof (TYPE)), \
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0, (NUMBER) * sizeof (TYPE)))
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/* Unless explicitly specified, GDB obstacks always use xmalloc() and
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xfree(). */
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/* Note: ezannoni 2004-02-09: One could also specify the allocation
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functions using a special init function for each obstack,
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obstack_specify_allocation. However we just use obstack_init and
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let these defines here do the job. While one could argue the
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superiority of one approach over the other, we just chose one
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throughout. */
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#define obstack_chunk_alloc xmalloc
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#define obstack_chunk_free xfree
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#define obstack_grow_str(OBSTACK,STRING) \
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obstack_grow (OBSTACK, STRING, strlen (STRING))
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#define obstack_grow_str0(OBSTACK,STRING) \
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obstack_grow0 (OBSTACK, STRING, strlen (STRING))
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#define obstack_grow_wstr(OBSTACK, WSTRING) \
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obstack_grow (OBSTACK, WSTRING, sizeof (gdb_wchar_t) * gdb_wcslen (WSTRING))
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/* Concatenate NULL terminated variable argument list of `const char
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*' strings; return the new string. Space is found in the OBSTACKP.
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Argument list must be terminated by a sentinel expression `(char *)
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NULL'. */
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extern char *obconcat (struct obstack *obstackp, ...) ATTRIBUTE_SENTINEL;
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/* Duplicate STRING, returning an equivalent string that's allocated on the
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obstack OBSTACKP. */
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extern char *obstack_strdup (struct obstack *obstackp, const char *string);
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/* An obstack that frees itself on scope exit. */
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struct auto_obstack : obstack
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{
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auto_obstack ()
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{ obstack_init (this); }
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~auto_obstack ()
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{ obstack_free (this, NULL); }
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/* Free all memory in the obstack but leave it valid for further
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allocation. */
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void clear ()
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{ obstack_free (this, obstack_base (this)); }
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};
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#endif
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