Mercurial > hg > octave-nkf > gnulib-hg

annotate lib/c-stack.c @ 14152:c5273d4d49b3

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Update to Unicode 5.2.0. * lib/gen-uni-tables.c (output_predicate, output_category, output_combclass, output_bidi_category, output_decimal_digit_test, output_decimal_digit, output_digit_test, output_digit, output_numeric_test, output_numeric, output_mirror, output_scripts, output_scripts_byname, output_blocks, output_ident_category): Fix comment header. (is_WBP_MIDNUMLET, is_WBP_MIDLETTER): New functions, extracted from get_wbp. (PROP_CASED, PROP_CASE_IGNORABLE, PROP_CHANGES_WHEN_*): New enumeration items. (fill_properties): Also fill the peoperties Cased, Case_Ignorable, Changes_When_Lowercased, Changes_When_Uppercased, Changes_When_Titlecased, Changes_When_Casefolded, Changes_When_Casemapped. (is_property_alphabetic, is_property_default_ignorable_code_point): Update for Unicode 5.2.0. (is_property_cased, is_property_case_ignorable, is_property_changes_when_lowercased, is_property_changes_when_uppercased, is_property_changes_when_titlecased, is_property_changes_when_casefolded, is_property_changes_when_casemapped): New functions. (output_properties): Output also the properties cased, case_ignorable, changes_when_lowercased, changes_when_uppercased, changes_when_titlecased, changes_when_casefolded, changes_when_casemapped. (symbolic_width): Update for Unicode 5.2.0, incorporating changes from Unicode TR#11 revision 17 -> 19. (LBP_CP): New enumeration value. (LBP_*): Adjust values accordingly. (get_lbp): Update for Unicode 5.2.0, incorporating changes from Unicode TR#14 revision 22 -> 24. (debug_output_lbp): Allow for LBP_* bits >= 32. Support LBP_CP. (fill_org_lbp, debug_output_org_lbp, output_lbp): Support LBP_CP. (get_wbp): Update for Unicode 5.2.0, incorporating changes from Unicode TR#29 revision 13 -> 15. Use functions is_WBP_MIDNUMLET, is_WBP_MIDLETTER. (output_composition_tables): Allow for 24 bits instead of 16 bits in the code1 and code2 of each composition rule. * lib/unicase/cased.h: Regenerated for Unicode 5.2.0. * lib/unicase/ignorable.h: Likewise. * lib/unicase/tocasefold.h: Likewise. * lib/unicase/tolower.h: Likewise. * lib/unicase/totitle.h: Likewise. * lib/unicase/toupper.h: Likewise. * lib/unictype/bidi_of.h: Likewise. * lib/unictype/blocks.h: Likewise. * lib/unictype/categ_C.h: Likewise. * lib/unictype/categ_Cf.h: Likewise. * lib/unictype/categ_Cn.h: Likewise. * lib/unictype/categ_L.h: Likewise. * lib/unictype/categ_Ll.h: Likewise. * lib/unictype/categ_Lm.h: Likewise. * lib/unictype/categ_Lo.h: Likewise. * lib/unictype/categ_Lu.h: Likewise. * lib/unictype/categ_M.h: Likewise. * lib/unictype/categ_Mc.h: Likewise. * lib/unictype/categ_Mn.h: Likewise. * lib/unictype/categ_N.h: Likewise. * lib/unictype/categ_Nd.h: Likewise. * lib/unictype/categ_Nl.h: Likewise. * lib/unictype/categ_No.h: Likewise. * lib/unictype/categ_P.h: Likewise. * lib/unictype/categ_Pd.h: Likewise. * lib/unictype/categ_Po.h: Likewise. * lib/unictype/categ_S.h: Likewise. * lib/unictype/categ_Sc.h: Likewise. * lib/unictype/categ_So.h: Likewise. * lib/unictype/categ_of.h: Likewise. * lib/unictype/combining.h: Likewise. * lib/unictype/ctype_alnum.h: Likewise. * lib/unictype/ctype_alpha.h: Likewise. * lib/unictype/ctype_graph.h: Likewise. * lib/unictype/ctype_lower.h: Likewise. * lib/unictype/ctype_print.h: Likewise. * lib/unictype/ctype_punct.h: Likewise. * lib/unictype/ctype_upper.h: Likewise. * lib/unictype/decdigit.h: Likewise. * lib/unictype/digit.h: Likewise. * lib/unictype/numeric.h: Likewise. * lib/unictype/pr_alphabetic.h: Likewise. * lib/unictype/pr_bidi_arabic_digit.h: Likewise. * lib/unictype/pr_bidi_eur_num_terminator.h: Likewise. * lib/unictype/pr_bidi_european_digit.h: Likewise. * lib/unictype/pr_bidi_hebrew_right_to_left.h: Likewise. * lib/unictype/pr_bidi_left_to_right.h: Likewise. * lib/unictype/pr_bidi_non_spacing_mark.h: Likewise. * lib/unictype/pr_bidi_other_neutral.h: Likewise. * lib/unictype/pr_combining.h: Likewise. * lib/unictype/pr_composite.h: Likewise. * lib/unictype/pr_currency_symbol.h: Likewise. * lib/unictype/pr_dash.h: Likewise. * lib/unictype/pr_decimal_digit.h: Likewise. * lib/unictype/pr_deprecated.h: Likewise. * lib/unictype/pr_diacritic.h: Likewise. * lib/unictype/pr_extender.h: Likewise. * lib/unictype/pr_grapheme_base.h: Likewise. * lib/unictype/pr_grapheme_extend.h: Likewise. * lib/unictype/pr_grapheme_link.h: Likewise. * lib/unictype/pr_id_continue.h: Likewise. * lib/unictype/pr_id_start.h: Likewise. * lib/unictype/pr_ideographic.h: Likewise. * lib/unictype/pr_ignorable_control.h: Likewise. * lib/unictype/pr_logical_order_exception.h: Likewise. * lib/unictype/pr_lowercase.h: Likewise. * lib/unictype/pr_numeric.h: Likewise. * lib/unictype/pr_other_alphabetic.h: Likewise. * lib/unictype/pr_punctuation.h: Likewise. * lib/unictype/pr_sentence_terminal.h: Likewise. * lib/unictype/pr_terminal_punctuation.h: Likewise. * lib/unictype/pr_unassigned_code_value.h: Likewise. * lib/unictype/pr_unified_ideograph.h: Likewise. * lib/unictype/pr_uppercase.h: Likewise. * lib/unictype/pr_xid_continue.h: Likewise. * lib/unictype/pr_xid_start.h: Likewise. * lib/unictype/pr_zero_width.h: Likewise. * lib/unictype/scripts.h: Likewise. * lib/unictype/scripts_byname.gperf: Likewise. * lib/unictype/sy_java_ident.h: Likewise. * lib/unigbrk/gbrkprop.h: Likewise. * lib/unilbrk/lbrkprop1.h: Likewise. * lib/unilbrk/lbrkprop2.h: Likewise. * lib/unilbrk/lbrktables.h: Likewise. * lib/unilbrk/lbrktables.c (unilbrk_table): Add a row and column for LBP_CP. Implement rule LB30. * lib/uniwidth/width.c (nonspacing_table_data): Add U+0816..U+0819, U+081B..U+0823, U+0825..U+0827, U+0829..U+082D, U+0900, U+0955, U+109D, U+1A56, U+1A58..U+1A5E, U+1A60, U+1A62, U+1A65..U+1A6C, U+1A73..U+1A7C, U+1A7F, U+1CD0..U+1CD2, U+1CD4..U+1CE0, U+1CE2..U+1CE8, U+1CED, U+1DFD, U+2CEF..U+2CF1, U+A6F0..U+A6F1, U+A8E0..U+A8F1, U+A980..U+A982, U+A9B3, U+A9B6..U+A9B9, U+A9BC, U+AAB0, U+AAB2..U+AAB4, U+AAB7..U+AAB8, U+AABE..U+AABF, U+AAC1, U+ABE5, U+ABE8, U+ABED, U+11080..U+11081, U+110B3..U+110B6, U+110B9..U+110BA, U+110BD. (uc_width): Return 2 also for unassigned code points of planes 2 and 3. * lib/uninorm/composition-table.gperf: Regenerated for Unicode 5.2.0. * lib/uninorm/composition.c (struct composition_rule): Allow for 24 bits instead of 16 bits in the code1 and code2 of each composition rule. (uc_composition): Update for Unicode 5.2.0. * lib/uninorm/decomposition-table1.h: Regenerated for Unicode 5.2.0. * lib/uninorm/decomposition-table2.h: Likewise. * lib/uniwbrk/wbrkprop.h: Likewise. * tests/unicase/test-cased.c: Likewise. * tests/unicase/test-ignorable.c: Likewise. * tests/unicase/test-uc_tolower.c: Likewise. * tests/unicase/test-uc_totitle.c: Likewise. * tests/unicase/test-uc_toupper.c: Likewise. * tests/unictype/test-categ_C.c: Likewise. * tests/unictype/test-categ_Cf.c: Likewise. * tests/unictype/test-categ_Cn.c: Likewise. * tests/unictype/test-categ_L.c: Likewise. * tests/unictype/test-categ_Ll.c: Likewise. * tests/unictype/test-categ_Lm.c: Likewise. * tests/unictype/test-categ_Lo.c: Likewise. * tests/unictype/test-categ_Lu.c: Likewise. * tests/unictype/test-categ_M.c: Likewise. * tests/unictype/test-categ_Mc.c: Likewise. * tests/unictype/test-categ_Mn.c: Likewise. * tests/unictype/test-categ_N.c: Likewise. * tests/unictype/test-categ_Nd.c: Likewise. * tests/unictype/test-categ_Nl.c: Likewise. * tests/unictype/test-categ_No.c: Likewise. * tests/unictype/test-categ_P.c: Likewise. * tests/unictype/test-categ_Pd.c: Likewise. * tests/unictype/test-categ_Po.c: Likewise. * tests/unictype/test-categ_S.c: Likewise. * tests/unictype/test-categ_Sc.c: Likewise. * tests/unictype/test-categ_So.c: Likewise. * tests/unictype/test-ctype_alnum.c: Likewise. * tests/unictype/test-ctype_alpha.c: Likewise. * tests/unictype/test-ctype_graph.c: Likewise. * tests/unictype/test-ctype_lower.c: Likewise. * tests/unictype/test-ctype_print.c: Likewise. * tests/unictype/test-ctype_punct.c: Likewise. * tests/unictype/test-ctype_upper.c: Likewise. * tests/unictype/test-decdigit.h: Likewise. * tests/unictype/test-digit.h: Likewise. * tests/unictype/test-numeric.h: Likewise. * tests/unictype/test-pr_alphabetic.c: Likewise. * tests/unictype/test-pr_bidi_arabic_digit.c: Likewise. * tests/unictype/test-pr_bidi_eur_num_terminator.c: Likewise. * tests/unictype/test-pr_bidi_european_digit.c: Likewise. * tests/unictype/test-pr_bidi_hebrew_right_to_left.c: Likewise. * tests/unictype/test-pr_bidi_left_to_right.c: Likewise. * tests/unictype/test-pr_bidi_non_spacing_mark.c: Likewise. * tests/unictype/test-pr_bidi_other_neutral.c: Likewise. * tests/unictype/test-pr_combining.c: Likewise. * tests/unictype/test-pr_composite.c: Likewise. * tests/unictype/test-pr_currency_symbol.c: Likewise. * tests/unictype/test-pr_dash.c: Likewise. * tests/unictype/test-pr_decimal_digit.c: Likewise. * tests/unictype/test-pr_deprecated.c: Likewise. * tests/unictype/test-pr_diacritic.c: Likewise. * tests/unictype/test-pr_extender.c: Likewise. * tests/unictype/test-pr_grapheme_base.c: Likewise. * tests/unictype/test-pr_grapheme_extend.c: Likewise. * tests/unictype/test-pr_grapheme_link.c: Likewise. * tests/unictype/test-pr_id_continue.c: Likewise. * tests/unictype/test-pr_id_start.c: Likewise. * tests/unictype/test-pr_ideographic.c: Likewise. * tests/unictype/test-pr_ignorable_control.c: Likewise. * tests/unictype/test-pr_logical_order_exception.c: Likewise. * tests/unictype/test-pr_lowercase.c: Likewise. * tests/unictype/test-pr_numeric.c: Likewise. * tests/unictype/test-pr_other_alphabetic.c: Likewise. * tests/unictype/test-pr_punctuation.c: Likewise. * tests/unictype/test-pr_sentence_terminal.c: Likewise. * tests/unictype/test-pr_terminal_punctuation.c: Likewise. * tests/unictype/test-pr_unassigned_code_value.c: Likewise. * tests/unictype/test-pr_unified_ideograph.c: Likewise. * tests/unictype/test-pr_uppercase.c: Likewise. * tests/unictype/test-pr_xid_continue.c: Likewise. * tests/unictype/test-pr_xid_start.c: Likewise. * tests/unictype/test-pr_zero_width.c: Likewise. * tests/unigbrk/test-uc-gbrk-prop.h: Likewise. * tests/unilbrk/test-u8-possible-linebreaks.c (main): Update for changed behaviour: line breaking is now disallowed between a letter or '=' and '('. * tests/unilbrk/test-u16-possible-linebreaks.c (main): Likewise. * tests/unilbrk/test-u32-possible-linebreaks.c (main): Likewise. * tests/unilbrk/test-ulc-possible-linebreaks.c (main): Likewise. * tests/unilbrk/test-ulc-width-linebreaks.c (main): Likewise. * tests/uniwidth/test-uc_width2.sh: Same updates as in lib/uniwidth/width.c. * tests/uninorm/NormalizationTest.txt: Update from Unicode 5.2.0, without comments, but with the original copyright notice. * lib/unicase/special-casing-table.gperf: Regenerated; only comment changes. * lib/unictype/categ_Cc.h: Likewise. * lib/unictype/categ_Co.h: Likewise. * lib/unictype/categ_Cs.h: Likewise. * lib/unictype/categ_Lt.h: Likewise. * lib/unictype/categ_Me.h: Likewise. * lib/unictype/categ_Pc.h: Likewise. * lib/unictype/categ_Pe.h: Likewise. * lib/unictype/categ_Pf.h: Likewise. * lib/unictype/categ_Pi.h: Likewise. * lib/unictype/categ_Ps.h: Likewise. * lib/unictype/categ_Sk.h: Likewise. * lib/unictype/categ_Sm.h: Likewise. * lib/unictype/categ_Z.h: Likewise. * lib/unictype/categ_Zl.h: Likewise. * lib/unictype/categ_Zp.h: Likewise. * lib/unictype/categ_Zs.h: Likewise. * lib/unictype/ctype_blank.h: Likewise. * lib/unictype/ctype_cntrl.h: Likewise. * lib/unictype/ctype_digit.h: Likewise. * lib/unictype/ctype_space.h: Likewise. * lib/unictype/ctype_xdigit.h: Likewise. * lib/unictype/mirror.h: Likewise. * lib/unictype/pr_ascii_hex_digit.h: Likewise. * lib/unictype/pr_bidi_arabic_right_to_left.h: Likewise. * lib/unictype/pr_bidi_block_separator.h: Likewise. * lib/unictype/pr_bidi_boundary_neutral.h: Likewise. * lib/unictype/pr_bidi_common_separator.h: Likewise. * lib/unictype/pr_bidi_control.h: Likewise. * lib/unictype/pr_bidi_embedding_or_override.h: Likewise. * lib/unictype/pr_bidi_eur_num_separator.h: Likewise. * lib/unictype/pr_bidi_pdf.h: Likewise. * lib/unictype/pr_bidi_segment_separator.h: Likewise. * lib/unictype/pr_bidi_whitespace.h: Likewise. * lib/unictype/pr_default_ignorable_code_point.h: Likewise. * lib/unictype/pr_format_control.h: Likewise. * lib/unictype/pr_hex_digit.h: Likewise. * lib/unictype/pr_hyphen.h: Likewise. * lib/unictype/pr_ids_binary_operator.h: Likewise. * lib/unictype/pr_ids_trinary_operator.h: Likewise. * lib/unictype/pr_iso_control.h: Likewise. * lib/unictype/pr_join_control.h: Likewise. * lib/unictype/pr_left_of_pair.h: Likewise. * lib/unictype/pr_line_separator.h: Likewise. * lib/unictype/pr_math.h: Likewise. * lib/unictype/pr_non_break.h: Likewise. * lib/unictype/pr_not_a_character.h: Likewise. * lib/unictype/pr_other_default_ignorable_code_point.h: Likewise. * lib/unictype/pr_other_grapheme_extend.h: Likewise. * lib/unictype/pr_other_id_continue.h: Likewise. * lib/unictype/pr_other_id_start.h: Likewise. * lib/unictype/pr_other_lowercase.h: Likewise. * lib/unictype/pr_other_math.h: Likewise. * lib/unictype/pr_other_uppercase.h: Likewise. * lib/unictype/pr_paired_punctuation.h: Likewise. * lib/unictype/pr_paragraph_separator.h: Likewise. * lib/unictype/pr_pattern_syntax.h: Likewise. * lib/unictype/pr_pattern_white_space.h: Likewise. * lib/unictype/pr_private_use.h: Likewise. * lib/unictype/pr_quotation_mark.h: Likewise. * lib/unictype/pr_radical.h: Likewise. * lib/unictype/pr_soft_dotted.h: Likewise. * lib/unictype/pr_space.h: Likewise. * lib/unictype/pr_titlecase.h: Likewise. * lib/unictype/pr_variation_selector.h: Likewise. * lib/unictype/pr_white_space.h: Likewise. * lib/unictype/sy_c_ident.h: Likewise. * lib/unictype/sy_c_whitespace.h: Likewise. * lib/unictype/sy_java_whitespace.h: Likewise. * modules/uni*/*: Bump version number of expected libunistring version. Reported by Simon Josefsson.
author Bruno Haible <bruno@clisp.org>
date Sun, 09 Jan 2011 11:09:25 +0100
parents 97fc9a21a8fb
children 3cb76305b3e9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
1 /* Stack overflow handling.
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
2
14079
97fc9a21a8fb maint: update almost all copyright ranges to include 2011
Jim Meyering <meyering@redhat.com>
parents: 13818
diff changeset
3 Copyright (C) 2002, 2004, 2006, 2008-2011 Free Software Foundation, Inc.
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
4
9309
bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+.
Bruno Haible <bruno@clisp.org>
parents: 7302
diff changeset
5 This program is free software: you can redistribute it and/or modify
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
6 it under the terms of the GNU General Public License as published by
9309
bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+.
Bruno Haible <bruno@clisp.org>
parents: 7302
diff changeset
7 the Free Software Foundation; either version 3 of the License, or
bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+.
Bruno Haible <bruno@clisp.org>
parents: 7302
diff changeset
8 (at your option) any later version.
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
9
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
10 This program is distributed in the hope that it will be useful,
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
13 GNU General Public License for more details.
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
14
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
15 You should have received a copy of the GNU General Public License
9309
bbbbbf4cd1c5 Change copyright notice from GPLv2+ to GPLv3+.
Bruno Haible <bruno@clisp.org>
parents: 7302
diff changeset
16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
17
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
18 /* Written by Paul Eggert. */
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
19
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
20 /* NOTES:
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
21
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
22 A program that uses alloca, dynamic arrays, or large local
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
23 variables may extend the stack by more than a page at a time. If
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
24 so, when the stack overflows the operating system may not detect
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
25 the overflow until the program uses the array, and this module may
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
26 incorrectly report a program error instead of a stack overflow.
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
27
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
28 To avoid this problem, allocate only small objects on the stack; a
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
29 program should be OK if it limits single allocations to a page or
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
30 less. Allocate larger arrays in static storage, or on the heap
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
31 (e.g., with malloc). Yes, this is a pain, but we don't know of any
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
32 better solution that is portable.
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
33
4915
7994c15009db Merge from diffutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 3921
diff changeset
34 No attempt has been made to deal with multithreaded applications. */
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
35
7302
8a1a9361108c * _fpending.c: Include <config.h> unconditionally, since we no
Paul Eggert <eggert@cs.ucla.edu>
parents: 6689
diff changeset
36 #include <config.h>
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
37
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
38 #ifndef __attribute__
9613
c4fa39bf5223 Don't redefine __attribute__ without a need.
Bruno Haible <bruno@clisp.org>
parents: 9309
diff changeset
39 # if __GNUC__ < 3
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
40 # define __attribute__(x)
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
41 # endif
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
42 #endif
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
43
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
44 #include "gettext.h"
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
45 #define _(msgid) gettext (msgid)
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
46
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
47 #include <errno.h>
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
48
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
49 #include <signal.h>
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
50 #if ! HAVE_STACK_T && ! defined stack_t
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
51 typedef struct sigaltstack stack_t;
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
52 #endif
10276
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
53 #ifndef SIGSTKSZ
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
54 # define SIGSTKSZ 16384
13818
7d63d145c370 c-stack: work around libsigsegv 2.8 bug
Eric Blake <eblake@redhat.com>
parents: 12559
diff changeset
55 #elif HAVE_LIBSIGSEGV && SIGSTKSZ < 16384
7d63d145c370 c-stack: work around libsigsegv 2.8 bug
Eric Blake <eblake@redhat.com>
parents: 12559
diff changeset
56 /* libsigsegv 2.6 through 2.8 have a bug where some architectures use
7d63d145c370 c-stack: work around libsigsegv 2.8 bug
Eric Blake <eblake@redhat.com>
parents: 12559
diff changeset
57 more than the Linux default of an 8k alternate stack when deciding
7d63d145c370 c-stack: work around libsigsegv 2.8 bug
Eric Blake <eblake@redhat.com>
parents: 12559
diff changeset
58 if a fault was caused by stack overflow. */
7d63d145c370 c-stack: work around libsigsegv 2.8 bug
Eric Blake <eblake@redhat.com>
parents: 12559
diff changeset
59 # undef SIGSTKSZ
7d63d145c370 c-stack: work around libsigsegv 2.8 bug
Eric Blake <eblake@redhat.com>
parents: 12559
diff changeset
60 # define SIGSTKSZ 16384
10276
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
61 #endif
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
62
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
63 #include <stdlib.h>
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
64 #include <string.h>
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
65
10214
6fcac230dda4 Simplify c-stack prerequisites.
Eric Blake <ebb9@byu.net>
parents: 10213
diff changeset
66 /* Posix 2001 declares ucontext_t in <ucontext.h>, Posix 200x in
6fcac230dda4 Simplify c-stack prerequisites.
Eric Blake <ebb9@byu.net>
parents: 10213
diff changeset
67 <signal.h>. */
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
68 #if HAVE_UCONTEXT_H
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
69 # include <ucontext.h>
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
70 #endif
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
71
6689
93d578c7aa44 * lib/c-stack.c: Include unistd.h unconditionally, since we now assume
Paul Eggert <eggert@cs.ucla.edu>
parents: 6259
diff changeset
72 #include <unistd.h>
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
73
10276
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
74 #if HAVE_LIBSIGSEGV
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
75 # include <sigsegv.h>
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
76 #endif
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
77
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
78 #include "c-stack.h"
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
79 #include "exitfail.h"
12333
d904c3a8f14c c-stack: avoid "ignoring return value of `write'" warning
Jim Meyering <meyering@redhat.com>
parents: 11941
diff changeset
80 #include "ignore-value.h"
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
81
10230
54813304edd2 Use sigaction module rather than signal().
Eric Blake <ebb9@byu.net>
parents: 10214
diff changeset
82 #if defined SA_ONSTACK && defined SA_SIGINFO
4969
0db24850c598 Fix c-stack.c portability bug on IRIX 5.3.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4915
diff changeset
83 # define SIGACTION_WORKS 1
0db24850c598 Fix c-stack.c portability bug on IRIX 5.3.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4915
diff changeset
84 #else
0db24850c598 Fix c-stack.c portability bug on IRIX 5.3.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4915
diff changeset
85 # define SIGACTION_WORKS 0
10960
a412de948252 Make c-stack work on Haiku.
Ingo Weinhold <ingo_weinhold@gmx.de>
parents: 10851
diff changeset
86 # ifndef SA_ONSTACK
a412de948252 Make c-stack work on Haiku.
Ingo Weinhold <ingo_weinhold@gmx.de>
parents: 10851
diff changeset
87 # define SA_ONSTACK 0
a412de948252 Make c-stack work on Haiku.
Ingo Weinhold <ingo_weinhold@gmx.de>
parents: 10851
diff changeset
88 # endif
4969
0db24850c598 Fix c-stack.c portability bug on IRIX 5.3.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4915
diff changeset
89 #endif
0db24850c598 Fix c-stack.c portability bug on IRIX 5.3.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4915
diff changeset
90
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
91 extern char *program_name;
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
92
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
93 /* The user-specified action to take when a SEGV-related program error
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
94 or stack overflow occurs. */
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
95 static void (* volatile segv_action) (int);
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
96
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
97 /* Translated messages for program errors and stack overflow. Do not
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
98 translate them in the signal handler, since gettext is not
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
99 async-signal-safe. */
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
100 static char const * volatile program_error_message;
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
101 static char const * volatile stack_overflow_message;
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
102
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
103 /* Output an error message, then exit with status EXIT_FAILURE if it
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
104 appears to have been a stack overflow, or with a core dump
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
105 otherwise. This function is async-signal-safe. */
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
106
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
107 static void die (int) __attribute__ ((noreturn));
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
108 static void
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
109 die (int signo)
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
110 {
4915
7994c15009db Merge from diffutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 3921
diff changeset
111 char const *message;
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
112 segv_action (signo);
4915
7994c15009db Merge from diffutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 3921
diff changeset
113 message = signo ? program_error_message : stack_overflow_message;
12333
d904c3a8f14c c-stack: avoid "ignoring return value of `write'" warning
Jim Meyering <meyering@redhat.com>
parents: 11941
diff changeset
114 ignore_value (write (STDERR_FILENO, program_name, strlen (program_name)));
d904c3a8f14c c-stack: avoid "ignoring return value of `write'" warning
Jim Meyering <meyering@redhat.com>
parents: 11941
diff changeset
115 ignore_value (write (STDERR_FILENO, ": ", 2));
d904c3a8f14c c-stack: avoid "ignoring return value of `write'" warning
Jim Meyering <meyering@redhat.com>
parents: 11941
diff changeset
116 ignore_value (write (STDERR_FILENO, message, strlen (message)));
d904c3a8f14c c-stack: avoid "ignoring return value of `write'" warning
Jim Meyering <meyering@redhat.com>
parents: 11941
diff changeset
117 ignore_value (write (STDERR_FILENO, "\n", 1));
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
118 if (! signo)
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
119 _exit (exit_failure);
10003
655ec8b9fbde Use 'raise'.
Bruno Haible <bruno@clisp.org>
parents: 9830
diff changeset
120 raise (signo);
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
121 abort ();
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
122 }
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
123
10358
37fd490ee38d c-stack: test that stack overflow can be caught
Eric Blake <ebb9@byu.net>
parents: 10279
diff changeset
124 #if (HAVE_SIGALTSTACK && HAVE_DECL_SIGALTSTACK \
37fd490ee38d c-stack: test that stack overflow can be caught
Eric Blake <ebb9@byu.net>
parents: 10279
diff changeset
125 && HAVE_STACK_OVERFLOW_HANDLING) || HAVE_LIBSIGSEGV
10276
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
126
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
127 /* Storage for the alternate signal stack. */
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
128 static union
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
129 {
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
130 char buffer[SIGSTKSZ];
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
131
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
132 /* These other members are for proper alignment. There's no
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
133 standard way to guarantee stack alignment, but this seems enough
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
134 in practice. */
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
135 long double ld;
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
136 long l;
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
137 void *p;
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
138 } alternate_signal_stack;
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
139
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
140 static void
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
141 null_action (int signo __attribute__ ((unused)))
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
142 {
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
143 }
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
144
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
145 #endif /* SIGALTSTACK || LIBSIGSEGV */
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
146
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
147 /* Only use libsigsegv if we need it; platforms like Solaris can
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
148 detect stack overflow without the overhead of an external
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
149 library. */
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
150 #if HAVE_LIBSIGSEGV && ! HAVE_XSI_STACK_OVERFLOW_HEURISTIC
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
151
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
152 /* Nonzero if general segv handler could not be installed. */
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
153 static volatile int segv_handler_missing;
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
154
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
155 /* Handle a segmentation violation and exit if it cannot be stack
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
156 overflow. This function is async-signal-safe. */
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
157
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
158 static int segv_handler (void *address __attribute__ ((unused)),
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12335
diff changeset
159 int serious)
10276
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
160 {
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
161 # if DEBUG
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
162 {
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
163 char buf[1024];
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
164 sprintf (buf, "segv_handler serious=%d\n", serious);
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
165 write (STDERR_FILENO, buf, strlen (buf));
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
166 }
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
167 # endif
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
168
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
169 /* If this fault is not serious, return 0 to let the stack overflow
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
170 handler take a shot at it. */
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
171 if (!serious)
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
172 return 0;
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
173 die (SIGSEGV);
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
174 }
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
175
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
176 /* Handle a segmentation violation that is likely to be a stack
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
177 overflow and exit. This function is async-signal-safe. */
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
178
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
179 static void overflow_handler (int, stackoverflow_context_t)
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
180 __attribute__ ((noreturn));
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
181 static void
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
182 overflow_handler (int emergency,
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12335
diff changeset
183 stackoverflow_context_t context __attribute__ ((unused)))
10276
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
184 {
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
185 # if DEBUG
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
186 {
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
187 char buf[1024];
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
188 sprintf (buf, "overflow_handler emergency=%d segv_handler_missing=%d\n",
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12335
diff changeset
189 emergency, segv_handler_missing);
10276
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
190 write (STDERR_FILENO, buf, strlen (buf));
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
191 }
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
192 # endif
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
193
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
194 die ((!emergency || segv_handler_missing) ? 0 : SIGSEGV);
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
195 }
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
196
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
197 int
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
198 c_stack_action (void (*action) (int))
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
199 {
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
200 segv_action = action ? action : null_action;
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
201 program_error_message = _("program error");
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
202 stack_overflow_message = _("stack overflow");
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
203
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
204 /* Always install the overflow handler. */
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
205 if (stackoverflow_install_handler (overflow_handler,
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
206 alternate_signal_stack.buffer,
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
207 sizeof alternate_signal_stack.buffer))
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
208 {
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
209 errno = ENOTSUP;
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
210 return -1;
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
211 }
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
212 /* Try installing a general handler; if it fails, then treat all
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
213 segv as stack overflow. */
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
214 segv_handler_missing = sigsegv_install_handler (segv_handler);
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
215 return 0;
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
216 }
adfc5a204195 Make c-stack use libsigsegv, when available.
Eric Blake <ebb9@byu.net>
parents: 10230
diff changeset
217
10358
37fd490ee38d c-stack: test that stack overflow can be caught
Eric Blake <ebb9@byu.net>
parents: 10279
diff changeset
218 #elif HAVE_SIGALTSTACK && HAVE_DECL_SIGALTSTACK && HAVE_STACK_OVERFLOW_HANDLING
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
219
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
220 /* Direction of the C runtime stack. This function is
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
221 async-signal-safe. */
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
222
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
223 # if STACK_DIRECTION
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
224 # define find_stack_direction(ptr) STACK_DIRECTION
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
225 # else
12335
d6110537824b c-stack: avoid defining an unused static function
Jim Meyering <meyering@redhat.com>
parents: 12333
diff changeset
226 # if ! SIGACTION_WORKS || HAVE_XSI_STACK_OVERFLOW_HEURISTIC
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
227 static int
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
228 find_stack_direction (char const *addr)
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
229 {
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
230 char dummy;
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
231 return ! addr ? find_stack_direction (&dummy) : addr < &dummy ? 1 : -1;
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
232 }
12335
d6110537824b c-stack: avoid defining an unused static function
Jim Meyering <meyering@redhat.com>
parents: 12333
diff changeset
233 # endif
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
234 # endif
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
235
4969
0db24850c598 Fix c-stack.c portability bug on IRIX 5.3.
Paul Eggert <eggert@cs.ucla.edu>
parents: 4915
diff changeset
236 # if SIGACTION_WORKS
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
237
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
238 /* Handle a segmentation violation and exit. This function is
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
239 async-signal-safe. */
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
240
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
241 static void segv_handler (int, siginfo_t *, void *) __attribute__((noreturn));
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
242 static void
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
243 segv_handler (int signo, siginfo_t *info,
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12335
diff changeset
244 void *context __attribute__ ((unused)))
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
245 {
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
246 /* Clear SIGNO if it seems to have been a stack overflow. */
11077
ddb65537c2d0 On HP-UX, don't pretend it was a SIGSEGV when it was a stack overflow.
Bruno Haible <bruno@clisp.org>
parents: 11049
diff changeset
247 # if ! HAVE_XSI_STACK_OVERFLOW_HEURISTIC
ddb65537c2d0 On HP-UX, don't pretend it was a SIGSEGV when it was a stack overflow.
Bruno Haible <bruno@clisp.org>
parents: 11049
diff changeset
248 /* We can't easily determine whether it is a stack overflow; so
ddb65537c2d0 On HP-UX, don't pretend it was a SIGSEGV when it was a stack overflow.
Bruno Haible <bruno@clisp.org>
parents: 11049
diff changeset
249 assume that the rest of our program is perfect (!) and that
ddb65537c2d0 On HP-UX, don't pretend it was a SIGSEGV when it was a stack overflow.
Bruno Haible <bruno@clisp.org>
parents: 11049
diff changeset
250 this segmentation violation is a stack overflow.
ddb65537c2d0 On HP-UX, don't pretend it was a SIGSEGV when it was a stack overflow.
Bruno Haible <bruno@clisp.org>
parents: 11049
diff changeset
251
ddb65537c2d0 On HP-UX, don't pretend it was a SIGSEGV when it was a stack overflow.
Bruno Haible <bruno@clisp.org>
parents: 11049
diff changeset
252 Note that although both Linux and Solaris provide
ddb65537c2d0 On HP-UX, don't pretend it was a SIGSEGV when it was a stack overflow.
Bruno Haible <bruno@clisp.org>
parents: 11049
diff changeset
253 sigaltstack, SA_ONSTACK, and SA_SIGINFO, currently only
ddb65537c2d0 On HP-UX, don't pretend it was a SIGSEGV when it was a stack overflow.
Bruno Haible <bruno@clisp.org>
parents: 11049
diff changeset
254 Solaris satisfies the XSI heueristic. This is because
ddb65537c2d0 On HP-UX, don't pretend it was a SIGSEGV when it was a stack overflow.
Bruno Haible <bruno@clisp.org>
parents: 11049
diff changeset
255 Solaris populates uc_stack with the details of the
ddb65537c2d0 On HP-UX, don't pretend it was a SIGSEGV when it was a stack overflow.
Bruno Haible <bruno@clisp.org>
parents: 11049
diff changeset
256 interrupted stack, while Linux populates it with the details
ddb65537c2d0 On HP-UX, don't pretend it was a SIGSEGV when it was a stack overflow.
Bruno Haible <bruno@clisp.org>
parents: 11049
diff changeset
257 of the current stack. */
ddb65537c2d0 On HP-UX, don't pretend it was a SIGSEGV when it was a stack overflow.
Bruno Haible <bruno@clisp.org>
parents: 11049
diff changeset
258 signo = 0;
ddb65537c2d0 On HP-UX, don't pretend it was a SIGSEGV when it was a stack overflow.
Bruno Haible <bruno@clisp.org>
parents: 11049
diff changeset
259 # else
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
260 if (0 < info->si_code)
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
261 {
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
262 /* If the faulting address is within the stack, or within one
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12335
diff changeset
263 page of the stack end, assume that it is a stack
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12335
diff changeset
264 overflow. */
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
265 ucontext_t const *user_context = context;
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
266 char const *stack_base = user_context->uc_stack.ss_sp;
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
267 size_t stack_size = user_context->uc_stack.ss_size;
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
268 char const *faulting_address = info->si_addr;
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
269 size_t s = faulting_address - stack_base;
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
270 size_t page_size = sysconf (_SC_PAGESIZE);
10230
54813304edd2 Use sigaction module rather than signal().
Eric Blake <ebb9@byu.net>
parents: 10214
diff changeset
271 if (find_stack_direction (NULL) < 0)
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12335
diff changeset
272 s += page_size;
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
273 if (s < stack_size + page_size)
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12335
diff changeset
274 signo = 0;
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
275
4915
7994c15009db Merge from diffutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 3921
diff changeset
276 # if DEBUG
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
277 {
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12335
diff changeset
278 char buf[1024];
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12335
diff changeset
279 sprintf (buf,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12335
diff changeset
280 "segv_handler fault=%p base=%p size=%lx page=%lx signo=%d\n",
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12335
diff changeset
281 faulting_address, stack_base, (unsigned long) stack_size,
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12335
diff changeset
282 (unsigned long) page_size, signo);
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12335
diff changeset
283 write (STDERR_FILENO, buf, strlen (buf));
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
284 }
4915
7994c15009db Merge from diffutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 3921
diff changeset
285 # endif
11077
ddb65537c2d0 On HP-UX, don't pretend it was a SIGSEGV when it was a stack overflow.
Bruno Haible <bruno@clisp.org>
parents: 11049
diff changeset
286 }
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
287 # endif
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
288
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
289 die (signo);
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
290 }
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
291 # endif
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
292
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
293 int
4915
7994c15009db Merge from diffutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 3921
diff changeset
294 c_stack_action (void (*action) (int))
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
295 {
4915
7994c15009db Merge from diffutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 3921
diff changeset
296 int r;
7994c15009db Merge from diffutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 3921
diff changeset
297 stack_t st;
10230
54813304edd2 Use sigaction module rather than signal().
Eric Blake <ebb9@byu.net>
parents: 10214
diff changeset
298 struct sigaction act;
4915
7994c15009db Merge from diffutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 3921
diff changeset
299 st.ss_flags = 0;
10470
9867f4fee019 c-stack: work around Irix sigaltstack bug
Eric Blake <ebb9@byu.net>
parents: 10358
diff changeset
300 # if SIGALTSTACK_SS_REVERSED
9867f4fee019 c-stack: work around Irix sigaltstack bug
Eric Blake <ebb9@byu.net>
parents: 10358
diff changeset
301 /* Irix mistakenly treats ss_sp as the upper bound, rather than
9867f4fee019 c-stack: work around Irix sigaltstack bug
Eric Blake <ebb9@byu.net>
parents: 10358
diff changeset
302 lower bound, of the alternate stack. */
9867f4fee019 c-stack: work around Irix sigaltstack bug
Eric Blake <ebb9@byu.net>
parents: 10358
diff changeset
303 st.ss_sp = alternate_signal_stack.buffer + SIGSTKSZ - sizeof (void *);
9867f4fee019 c-stack: work around Irix sigaltstack bug
Eric Blake <ebb9@byu.net>
parents: 10358
diff changeset
304 st.ss_size = sizeof alternate_signal_stack.buffer - sizeof (void *);
9867f4fee019 c-stack: work around Irix sigaltstack bug
Eric Blake <ebb9@byu.net>
parents: 10358
diff changeset
305 # else
4915
7994c15009db Merge from diffutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 3921
diff changeset
306 st.ss_sp = alternate_signal_stack.buffer;
7994c15009db Merge from diffutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 3921
diff changeset
307 st.ss_size = sizeof alternate_signal_stack.buffer;
10470
9867f4fee019 c-stack: work around Irix sigaltstack bug
Eric Blake <ebb9@byu.net>
parents: 10358
diff changeset
308 # endif
10230
54813304edd2 Use sigaction module rather than signal().
Eric Blake <ebb9@byu.net>
parents: 10214
diff changeset
309 r = sigaltstack (&st, NULL);
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
310 if (r != 0)
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
311 return r;
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
312
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
313 segv_action = action ? action : null_action;
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
314 program_error_message = _("program error");
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
315 stack_overflow_message = _("stack overflow");
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
316
10230
54813304edd2 Use sigaction module rather than signal().
Eric Blake <ebb9@byu.net>
parents: 10214
diff changeset
317 sigemptyset (&act.sa_mask);
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
318
10230
54813304edd2 Use sigaction module rather than signal().
Eric Blake <ebb9@byu.net>
parents: 10214
diff changeset
319 # if SIGACTION_WORKS
54813304edd2 Use sigaction module rather than signal().
Eric Blake <ebb9@byu.net>
parents: 10214
diff changeset
320 /* POSIX 1003.1-2001 says SA_RESETHAND implies SA_NODEFER, but
54813304edd2 Use sigaction module rather than signal().
Eric Blake <ebb9@byu.net>
parents: 10214
diff changeset
321 this is not true on Solaris 8 at least. It doesn't hurt to use
54813304edd2 Use sigaction module rather than signal().
Eric Blake <ebb9@byu.net>
parents: 10214
diff changeset
322 SA_NODEFER here, so leave it in. */
54813304edd2 Use sigaction module rather than signal().
Eric Blake <ebb9@byu.net>
parents: 10214
diff changeset
323 act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND | SA_SIGINFO;
54813304edd2 Use sigaction module rather than signal().
Eric Blake <ebb9@byu.net>
parents: 10214
diff changeset
324 act.sa_sigaction = segv_handler;
54813304edd2 Use sigaction module rather than signal().
Eric Blake <ebb9@byu.net>
parents: 10214
diff changeset
325 # else
10960
a412de948252 Make c-stack work on Haiku.
Ingo Weinhold <ingo_weinhold@gmx.de>
parents: 10851
diff changeset
326 act.sa_flags = SA_NODEFER | SA_ONSTACK | SA_RESETHAND;
10230
54813304edd2 Use sigaction module rather than signal().
Eric Blake <ebb9@byu.net>
parents: 10214
diff changeset
327 act.sa_handler = die;
54813304edd2 Use sigaction module rather than signal().
Eric Blake <ebb9@byu.net>
parents: 10214
diff changeset
328 # endif
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
329
10851
d31da80e6c50 Treat SIGBUS like SIFSEGV on platforms that need it.
Bruno Haible <bruno@clisp.org>
parents: 10470
diff changeset
330 # if FAULT_YIELDS_SIGBUS
d31da80e6c50 Treat SIGBUS like SIFSEGV on platforms that need it.
Bruno Haible <bruno@clisp.org>
parents: 10470
diff changeset
331 if (sigaction (SIGBUS, &act, NULL) < 0)
d31da80e6c50 Treat SIGBUS like SIFSEGV on platforms that need it.
Bruno Haible <bruno@clisp.org>
parents: 10470
diff changeset
332 return -1;
d31da80e6c50 Treat SIGBUS like SIFSEGV on platforms that need it.
Bruno Haible <bruno@clisp.org>
parents: 10470
diff changeset
333 # endif
10230
54813304edd2 Use sigaction module rather than signal().
Eric Blake <ebb9@byu.net>
parents: 10214
diff changeset
334 return sigaction (SIGSEGV, &act, NULL);
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
335 }
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
336
10358
37fd490ee38d c-stack: test that stack overflow can be caught
Eric Blake <ebb9@byu.net>
parents: 10279
diff changeset
337 #else /* ! ((HAVE_SIGALTSTACK && HAVE_DECL_SIGALTSTACK
12421
e8d2c6fc33ad Use spaces for indentation, not tabs.
Bruno Haible <bruno@clisp.org>
parents: 12335
diff changeset
338 && HAVE_STACK_OVERFLOW_HANDLING) || HAVE_LIBSIGSEGV) */
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
339
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
340 int
4915
7994c15009db Merge from diffutils.
Paul Eggert <eggert@cs.ucla.edu>
parents: 3921
diff changeset
341 c_stack_action (void (*action) (int) __attribute__ ((unused)))
3902
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
342 {
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
343 errno = ENOTSUP;
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
344 return -1;
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
345 }
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
346
f26afed46772 New file, from diffutils-2.8.2.
Jim Meyering <jim@meyering.net>
parents:
diff changeset
347 #endif