Fix local_cons etc. to not exhaust the stack when in a loop.

Problem reported in:
http://lists.gnu.org/archive/html/emacs-devel/2014-09/msg00696.html
* buffer.c (Fother_buffer, other_buffer_safely, init_buffer):
* charset.c (load_charset_map_from_file, Ffind_charset_region)
(Ffind_charset_string):
* chartab.c (uniprop_encode_value_numeric, uniprop_table):
* data.c (wrong_range):
* editfns.c (Fpropertize, format2):
* emacs.c (init_cmdargs, decode_env_path):
* fileio.c (auto_save_error):
* fns.c (Fyes_or_no_p):
* font.c (font_style_to_value, font_parse_xlfd)
(font_parse_family_registry, font_delete_unmatched)
(font_add_log):
* fontset.c (Fset_fontset_font):
* frame.c (x_get_arg):
* keyboard.c (echo_dash, safe_run_hooks_error, parse_menu_item)
(read_char_minibuf_menu_prompt):
* keymap.c (silly_event_symbol_error, describe_vector):
* lread.c (load_warn_old_style_backquotes):
* menu.c (single_menu_item):
* minibuf.c (Fread_buffer):
* process.c (status_message, Fformat_network_address)
(server_accept_connection):
* textprop.c (copy_text_properties):
* xdisp.c (Fcurrent_bidi_paragraph_direction):
* xfns.c (x_default_scroll_bar_color_parameter):
* xfont.c (xfont_open):
* xselect.c (x_clipboard_manager_error_1):
* xterm.c (x_term_init):
Put USE_LOCAL_ALLOCA at the start of the function.
* fns.c (maybe_resize_hash_table): Use build_string instead of
build_local_string, since we'd otherwise need a conditional
USE_LOCAL_ALLOCA here, but this is just debugging output and is
not worth the bother of optimization.
* font.c (font_delete_unmatched): Remove by-hand code that
observed MAX_ALLOCA limit, since it's now done automatically.
* keymap.c (Fsingle_key_description): Put USE_SAFE_ALLOCA at top,
since build_local_string needs its sa_alloc.
* lisp.h (lisp_word_count): New function.
(SAFE_ALLOCA_LISP): Use it.
(USE_LOCAL_ALLOCA): New macro.
(local_cons, make_local_vector, make_local_string):
Observe the MAX_ALLOCA limit.
(LISP_STRING_OVERHEAD): New constant.
(make_local_string): Use it.

1 files changed, 4 insertions, 1 deletions

diff --git a/src/buffer.c b/src/buffer.c
index dc2d17f9f67..591f585a7a9 100644
--- a/src/buffer.c
+++ b/src/buffer.c
@@ -1509,8 +1509,9 @@ frame's buffer list.
 The buffer is found by scanning the selected or specified frame's buffer
 list first, followed by the list of all buffers.  If no other buffer
 exists, return the buffer `*scratch*' (creating it if necessary).  */)
-  (register Lisp_Object buffer, Lisp_Object visible_ok, Lisp_Object frame)
+  (Lisp_Object buffer, Lisp_Object visible_ok, Lisp_Object frame)
 {
+  USE_LOCAL_ALLOCA;
   struct frame *f = decode_any_frame (frame);
   Lisp_Object tail = f->buffer_list, pred = f->buffer_predicate;
   Lisp_Object buf, notsogood = Qnil;
@@ -1569,6 +1570,7 @@ exists, return the buffer `*scratch*' (creating it if necessary).  */)
 Lisp_Object
 other_buffer_safely (Lisp_Object buffer)
 {
+  USE_LOCAL_ALLOCA;
   Lisp_Object tail, buf;
 
   FOR_EACH_LIVE_BUFFER (tail, buf)
@@ -5238,6 +5240,7 @@ init_buffer_once (void)
 void
 init_buffer (int initialized)
 {
+  USE_LOCAL_ALLOCA;
   char *pwd;
   Lisp_Object temp;
   ptrdiff_t len;