[Bug middle-end/45484] r163660 ICEs gcc.c-torture/execute/builtins/sprintf-chk.c compilation, -Os at -m32

["ubizjak at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #10 from ubizjak at gmail dot com  2010-09-02 05:47 -------
(In reply to comment #8)

> Since this doesn't backtrace in gdb, I recompiled dwarf2out.c with the patch...

You should use bigger hammer.

Try valgrind using following procedure:

a) Create a preprocessed source
   "~/gcc-build/gcc/xgcc -B ~/gcc-build/gcc -Os -S -save-temps sprintf-chk.c"

b) fire up valgrind:
   "valgrind ~/gcc-build/gcc/cc1 -Os -quiet sprintf-chk.i"

==3664== Memcheck, a memory error detector
==3664== Copyright (C) 2002-2009, and GNU GPL'd, by Julian Seward et al.
==3664== Using Valgrind-3.5.0 and LibVEX; rerun with -h for copyright info
==3664== Command: /home/uros/gcc-build/gcc/cc1 -Os -quiet sprintf-chk.i
==3664== 
==3664== Invalid read of size 8
==3664==    at 0xC71730: search_line_sse2 (lex.c:394)
==3664==    by 0xC71919: _cpp_clean_line (lex.c:665)
==3664==    by 0xC72317: _cpp_get_fresh_line (lex.c:1878)
==3664==    by 0xC73AA1: _cpp_lex_direct (lex.c:1943)
==3664==    by 0xC74896: _cpp_lex_token (lex.c:1817)
==3664==    by 0xC76FC7: cpp_get_token (macro.c:1240)
==3664==    by 0xC7727F: cpp_get_token_with_location (macro.c:1352)
==3664==    by 0x51684C: c_lex_with_flags (c-lex.c:302)
==3664==    by 0x4CFAA7: c_lex_one_token (c-parser.c:204)
==3664==    by 0x4DC468: c_parser_compound_statement_nostart (c-parser.c:320)
==3664==    by 0x4DEA18: c_parser_compound_statement (c-parser.c:3545)
==3664==    by 0x4DBDC2: c_parser_declaration_or_fndef (c-parser.c:1375)
==3664==  Address 0x5331f50 is 5,808 bytes inside a block of size 5,815 alloc'd
==3664==    at 0x4A05255: realloc (vg_replace_malloc.c:476)
==3664==    by 0xC9ADAC: xrealloc (xmalloc.c:179)
==3664==    by 0xC6659F: _cpp_convert_input (charset.c:1734)
==3664==    by 0xC6EFA2: read_file (files.c:648)
==3664==    by 0xC6F9CA: _cpp_stack_file (files.c:723)
==3664==    by 0xC71190: cpp_read_main_file (init.c:570)
==3664==    by 0x51B58A: c_common_post_options (c-opts.c:1124)
==3664==    by 0x7DACA4: toplev_main (toplev.c:1826)
==3664==    by 0x369861EC5C: (below main) (in /lib64/libc-2.12.so)
==3664== 
==3664== Invalid read of size 8
==3664==    at 0xC71723: search_line_sse2 (lex.c:382)
==3664==    by 0xC71919: _cpp_clean_line (lex.c:665)
==3664==    by 0xC72317: _cpp_get_fresh_line (lex.c:1878)
==3664==    by 0xC73AA1: _cpp_lex_direct (lex.c:1943)
==3664==    by 0xC74896: _cpp_lex_token (lex.c:1817)
==3664==    by 0xC76FC7: cpp_get_token (macro.c:1240)
==3664==    by 0xC7727F: cpp_get_token_with_location (macro.c:1352)
==3664==    by 0x51684C: c_lex_with_flags (c-lex.c:302)
==3664==    by 0x4CFAA7: c_lex_one_token (c-parser.c:204)
==3664==    by 0x4DC468: c_parser_compound_statement_nostart (c-parser.c:320)
==3664==    by 0x4DEA18: c_parser_compound_statement (c-parser.c:3545)
==3664==    by 0x4DBDC2: c_parser_declaration_or_fndef (c-parser.c:1375)
==3664==  Address 0x5331f50 is 5,808 bytes inside a block of size 5,815 alloc'd
==3664==    at 0x4A05255: realloc (vg_replace_malloc.c:476)
==3664==    by 0xC9ADAC: xrealloc (xmalloc.c:179)
==3664==    by 0xC6659F: _cpp_convert_input (charset.c:1734)
==3664==    by 0xC6EFA2: read_file (files.c:648)
==3664==    by 0xC6F9CA: _cpp_stack_file (files.c:723)
==3664==    by 0xC71190: cpp_read_main_file (init.c:570)
==3664==    by 0x51B58A: c_common_post_options (c-opts.c:1124)
==3664==    by 0x7DACA4: toplev_main (toplev.c:1826)
==3664==    by 0x369861EC5C: (below main) (in /lib64/libc-2.12.so)
==3664== 

==3680== ERROR SUMMARY: 4 errors from 2 contexts (suppressed: 6 from 6)

Woo-hoo?


-- 

ubizjak at gmail dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever Confirmed|0                           |1
   Last reconfirmed|0000-00-00 00:00:00         |2010-09-02 05:47:57
               date|                            |


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45484