* [Bug other/55358] Valgrind errors
2012-11-16 18:57 [Bug other/55358] New: Valgrind errors hjl.tools at gmail dot com
@ 2012-11-21 15:31 ` markus at trippelsdorf dot de
2012-11-21 16:53 ` markus at trippelsdorf dot de
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From: markus at trippelsdorf dot de @ 2012-11-21 15:31 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55358
Markus Trippelsdorf <markus at trippelsdorf dot de> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |markus at trippelsdorf dot
| |de
--- Comment #1 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-11-21 15:30:35 UTC ---
The last error is reproducible with e.g.:
% /var/tmp/gcc_valgrind/usr/local/bin/gcc -w -O2 -c
/home/markus/gcc/libiberty/cp-demangle.c
==6842== Invalid read of size 4
==6842== at 0xD20A91: rest_of_handle_ree() (ree.c:615)
==6842== by 0x826B2A: execute_one_pass(opt_pass*) (passes.c:2327)
==6842== by 0x826FA4: execute_pass_list(opt_pass*) (passes.c:2387)
==6842== by 0x826FB6: execute_pass_list(opt_pass*) (passes.c:2388)
==6842== by 0x826FB6: execute_pass_list(opt_pass*) (passes.c:2388)
==6842== by 0x5EC801: expand_function(cgraph_node*) (cgraphunit.c:1641)
==6842== by 0x5EE5C6: compile() (cgraphunit.c:1745)
==6842== by 0x5EEC69: finalize_compilation_unit() (cgraphunit.c:2120)
==6842== by 0x4D52EB: c_write_global_declarations() (c-decl.c:10120)
==6842== by 0x8C845C: compile_file() (toplev.c:559)
==6842== by 0x8CA319: toplev_main(int, char**) (toplev.c:1881)
==6842== by 0x4ECD894: (below main) (libc-start.c:258)
==6842== Address 0x5b37f51 is 2,577 bytes inside a block of size 2,580 alloc'd
==6842== at 0x4026BA4: calloc (in
/usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==6842== by 0xDFABD8: xcalloc (xmalloc.c:162)
==6842== by 0xD211C6: rest_of_handle_ree() (ree.c:884)
==6842== by 0x826B2A: execute_one_pass(opt_pass*) (passes.c:2327)
...
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From: markus at trippelsdorf dot de @ 2012-11-21 16:53 UTC (permalink / raw)
To: gcc-bugs
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--- Comment #2 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-11-21 16:52:59 UTC ---
==13066== Conditional jump or move depends on uninitialised value(s)
==13066== at 0x56333A: pp_c_specifier_qualifier_list(c_pretty_print_info*,
tree_node*) (c-pretty-print.c:449)
==13066== by 0x563668: pp_c_type_id(c_pretty_print_info*, tree_node*)
(c-pretty-print.c:621)
==13066== by 0x4FF780: c_tree_printer(pretty_print_info*, text_info*, char
const*, int, bool, bool, bool) (c-objc-common.c:149)
==13066== by 0xDB6682: pp_base_format(pretty_print_info*, text_info*)
(pretty-print.c:509)
==13066== by 0xDB4478: diagnostic_report_diagnostic(diagnostic_context*,
diagnostic_info*) (diagnostic.c:756)
==13066== by 0xDB5043: error_at(unsigned int, char const*, ...)
(diagnostic.c:1036)
==13066== by 0x4EA6BA: build_component_ref(unsigned int, tree_node*,
tree_node*) (c-typeck.c:2156)
==13066== by 0x50968B: c_parser_postfix_expression_after_primary(c_parser*,
unsigned int, c_expr) (c-parser.c:6946)
==13066== by 0x501568: c_parser_postfix_expression(c_parser*)
(c-parser.c:6779)
==13066== by 0x502F22: c_parser_unary_expression(c_parser*)
(c-parser.c:5978)
==13066== by 0x50733E: c_parser_cast_expression(c_parser*, c_expr*)
(c-parser.c:5830)
==13066== by 0x502E06: c_parser_unary_expression(c_parser*)
(c-parser.c:5892)
==13066==
==13066== Conditional jump or move depends on uninitialised value(s)
==13066== at 0x5633C8: pp_c_specifier_qualifier_list(c_pretty_print_info*,
tree_node*) (c-pretty-print.c:497)
==13066== by 0x563668: pp_c_type_id(c_pretty_print_info*, tree_node*)
(c-pretty-print.c:621)
==13066== by 0x4FF780: c_tree_printer(pretty_print_info*, text_info*, char
const*, int, bool, bool, bool) (c-objc-common.c:149)
==13066== by 0xDB6682: pp_base_format(pretty_print_info*, text_info*)
(pretty-print.c:509)
==13066== by 0xDB4478: diagnostic_report_diagnostic(diagnostic_context*,
diagnostic_info*) (diagnostic.c:756)
==13066== by 0xDB5043: error_at(unsigned int, char const*, ...)
(diagnostic.c:1036)
==13066== by 0x4EA6BA: build_component_ref(unsigned int, tree_node*,
tree_node*) (c-typeck.c:2156)
==13066== by 0x50968B: c_parser_postfix_expression_after_primary(c_parser*,
unsigned int, c_expr) (c-parser.c:6946)
==13066== by 0x501568: c_parser_postfix_expression(c_parser*)
(c-parser.c:6779)
==13066== by 0x502F22: c_parser_unary_expression(c_parser*)
(c-parser.c:5978)
==13066== by 0x50733E: c_parser_cast_expression(c_parser*, c_expr*)
(c-parser.c:5830)
==13066== by 0x502E06: c_parser_unary_expression(c_parser*)
(c-parser.c:5892)
==13066==
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From: markus at trippelsdorf dot de @ 2012-11-21 17:17 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55358
--- Comment #3 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-11-21 17:17:23 UTC ---
I hope it's OK to just dump the errors here as I encounter them.
This one looks similar to the rest_of_handle_ree() issue:
==23637== Invalid write of size 8
==23637== at 0xCF9951: rest_of_handle_dse() (dse.c:2874)
==23637== by 0x826B2A: execute_one_pass(opt_pass*) (passes.c:2327)
==23637== by 0x826FA4: execute_pass_list(opt_pass*) (passes.c:2387)
==23637== by 0x826FB6: execute_pass_list(opt_pass*) (passes.c:2388)
==23637== by 0x5EC801: expand_function(cgraph_node*) (cgraphunit.c:1641)
==23637== by 0x5EE5C6: compile() (cgraphunit.c:1745)
==23637== by 0x5EEC69: finalize_compilation_unit() (cgraphunit.c:2120)
==23637== by 0x4D52EB: c_write_global_declarations() (c-decl.c:10120)
==23637== by 0x8C845C: compile_file() (toplev.c:559)
==23637== by 0x8CA319: toplev_main(int, char**) (toplev.c:1881)
==23637== by 0x4ECD894: (below main) (libc-start.c:258)
==23637== Address 0x69fdd50 is 112 bytes inside a block of size 11,208 alloc'd
==23637== at 0x4028ECB: malloc (in
/usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==23637== by 0xDFAB97: xmalloc (xmalloc.c:147)
==23637== by 0x57E6C8: pool_alloc(alloc_pool_def*) (alloc-pool.c:282)
==23637== by 0xCF8F1C: record_store(rtx_def*, bb_info*) (dse.c:1544)
==23637== by 0xCF9D14: rest_of_handle_dse() (dse.c:2676)
==23637== by 0x826B2A: execute_one_pass(opt_pass*) (passes.c:2327)
==23637== by 0x826FA4: execute_pass_list(opt_pass*) (passes.c:2387)
==23637== by 0x826FB6: execute_pass_list(opt_pass*) (passes.c:2388)
==23637== by 0x5EC801: expand_function(cgraph_node*) (cgraphunit.c:1641)
==23637== by 0x5EE5C6: compile() (cgraphunit.c:1745)
==23637== by 0x5EEC69: finalize_compilation_unit() (cgraphunit.c:2120)
==23637== by 0x4D52EB: c_write_global_declarations() (c-decl.c:10120)
==23637==
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From: jakub at gcc dot gnu.org @ 2012-11-21 17:20 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55358
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-11-21 17:20:02 UTC ---
The ree.c miscompilation tracked in PR55430 now.
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To: gcc-bugs
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--- Comment #5 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-11-23 13:08:54 UTC ---
A new one:
==2442== Invalid write of size 8
==2442== at 0x672DF6: iterative_hash_canonical_type(tree_node*, unsigned
int) (gimple.c:3170)
==2442== by 0xD3F4A0: htab_find_slot (hashtab.c:712)
==2442== by 0x67DEA8: gimple_register_canonical_type(tree_node*)
(gimple.c:3438)
==2442== by 0x4D25C5: uniquify_nodes(data_in*, unsigned int) (lto.c:2050)
==2442== by 0x4D3A0A: lto_main() (lto.c:2089)
==2442== by 0x82195B: compile_file() (toplev.c:545)
==2442== by 0x8235CF: toplev_main(int, char**) (toplev.c:1881)
==2442== by 0x4ECD884: (below main) (libc-start.c:258)
==2442== Address 0x4031e98 is not stack'd, malloc'd or (recently) free'd
==2442==
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From: markus at trippelsdorf dot de @ 2012-11-28 8:51 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55358
--- Comment #6 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-11-28 08:51:26 UTC ---
Created attachment 28818
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28818
stl benchmark
The last issue can be reproduced with an old C++ STL benchmark
from Stepanov and Stroustrup (attached):
markus@x4 ~ % /var/tmp/gcc_valgrind/usr/local/bin/g++ -O2 -fprofile-generate
bench.cpp
markus@x4 ~ % ./a.out
size array vector with pointers vector with iterators deque
list set multiset
10 0.18 0.18 0.19 0.44
1.08 0.67 1.08
...
markus@x4 ~ % /var/tmp/gcc_valgrind/usr/local/bin/g++ -O2 -fprofile-use -flto
bench.cpp
==22679== Invalid write of size 8
==22679== at 0x68007D: iterative_hash_canonical_type(tree_node*, unsigned
int) (gimple.c:3170)
==22679== by 0xD611C0: htab_find_slot (hashtab.c:712)
==22679== by 0x68A918: gimple_register_canonical_type(tree_node*)
(gimple.c:3438)
==22679== by 0x4D093B: lto_file_read(lto_file_struct*, _IO_FILE*, int*)
(lto.c:2050)
==22679== by 0x4D25EA: lto_main() (lto.c:2966)
==22679== by 0x82A5B5: compile_file() (toplev.c:545)
==22679== by 0x82C4D9: toplev_main(int, char**) (toplev.c:1884)
==22679== by 0x4ECD884: (below main) (libc-start.c:258)
==22679== Address 0x4031e98 is not stack'd, malloc'd or (recently) free'd
==22679==
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From: markus at trippelsdorf dot de @ 2012-11-28 13:21 UTC (permalink / raw)
To: gcc-bugs
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--- Comment #7 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-11-28 13:20:54 UTC ---
The fix for:
==23637== Invalid write of size 8
==23637== at 0xCF9951: rest_of_handle_dse() (dse.c:2874)
...
seems to be simple. Because of "delete_dead_store_insn (ptr);"
"s_info->redundant_reason" may point into lala land:
(gdb) p *s_info
$3 = {is_set = false, is_large = false, group_id = 0, cse_base =
0xafafafafafafafaf, mem = 0xafafafafafafafaf, mem_addr = 0xafafafafafafafaf,
alias_set = -1347440721, begin = -5787213827046133841, end =
-5787213827046133841, positions_needed = {small_bitmask = 12659530246663417775,
large = {bmap = 0xafafafafafafafaf, count = -1347440721}}, next =
0xafafafafafafafaf, rhs = 0xafafafafafafafaf, const_rhs = 0xafafafafafafafaf,
redundant_reason = 0xafafafafafafafaf}
(gdb) p *ptr
$8 = {cannot_delete = true, wild_read = false, non_frame_wild_read = false,
frame_read = false, stack_pointer_based = false, contains_cselib_groups =
false, insn = 0x0, store_rec = 0x0, read_rec = 0x0, fixed_regs_live =
0x5e34f30, prev_insn = 0x54e9da0, next_local_store = 0x54e9da0}
diff --git a/gcc/dse.c b/gcc/dse.c
index f879adb..8d12e8d 100644
--- a/gcc/dse.c
+++ b/gcc/dse.c
@@ -2869,7 +2869,7 @@ dse_step1 (void)
INSN_UID (s_info->redundant_reason->insn));
delete_dead_store_insn (ptr);
}
- if (s_info)
+ if (ptr->store_rec && s_info)
s_info->redundant_reason = NULL;
free_store_info (ptr);
}
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From: jakub at gcc dot gnu.org @ 2012-11-28 14:48 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55358
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2012-11-28
Ever Confirmed|0 |1
--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-11-28 14:47:33 UTC ---
(In reply to comment #7)
> diff --git a/gcc/dse.c b/gcc/dse.c
> index f879adb..8d12e8d 100644
> --- a/gcc/dse.c
> +++ b/gcc/dse.c
> @@ -2869,7 +2869,7 @@ dse_step1 (void)
> INSN_UID (s_info->redundant_reason->insn));
> delete_dead_store_insn (ptr);
> }
> - if (s_info)
> + if (ptr->store_rec && s_info)
> s_info->redundant_reason = NULL;
> free_store_info (ptr);
> }
Actually, I fail to see what is that if (s_info) s_info->redundant_reason =
NULL;
good for, the following free_store_info (ptr) should pool_free s_info if
delete_dead_store_insn hasn't already called free_store_info. And it doesn't
seem that pool_alloced store info recs would rely on the field being cleared,
it seems we initialize it always:
store_info->redundant_reason = redundant_reason;
Thus, my preference would be just drop the two lines instead.
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From: jakub at gcc dot gnu.org @ 2012-11-28 16:50 UTC (permalink / raw)
To: gcc-bugs
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--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-11-28 16:49:49 UTC ---
Author: jakub
Date: Wed Nov 28 16:49:35 2012
New Revision: 193900
URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=193900
Log:
PR other/55358
* dse.c (rest_of_handle_dse): Remove superfluous clearing.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/dse.c
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From: markus at trippelsdorf dot de @ 2012-11-28 19:59 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55358
--- Comment #10 from Markus Trippelsdorf <markus at trippelsdorf dot de> 2012-11-28 19:58:43 UTC ---
iterative_hash_canonical_type (type=0x5941dc8, val=0) at
/home/markus/gcc/gcc/gimple.c:3170
3170 *slot = (void *) mp;
(gdb) bt
#0 iterative_hash_canonical_type (type=0x5941dc8, val=0) at
/home/markus/gcc/gcc/gimple.c:3170
#1 0x0000000000d616c1 in htab_find_slot (htab=0x4030850, element=0x5941dc8,
insert=INSERT) at /home/markus/gcc/libiberty/hashtab.c:712
#2 0x000000000068ac99 in gimple_register_canonical_type (t=0x5941dc8) at
/home/markus/gcc/gcc/gimple.c:3438
#3 0x00000000004d09dc in uniquify_nodes (from=3148, data_in=0x5601990) at
/home/markus/gcc/gcc/lto/lto.c:2050
#4 lto_read_decls (resolutions=..., data=0x5d33480, decl_data=0x404a000) at
/home/markus/gcc/gcc/lto/lto.c:2089
#5 lto_file_finalize (file=<optimized out>, file_data=0x404a000) at
/home/markus/gcc/gcc/lto/lto.c:2341
#6 lto_create_files_from_ids (count=0x7fefffd98, file_data=0x404a000,
file=0x5330490) at /home/markus/gcc/gcc/lto/lto.c:2351
#7 lto_file_read (file=<optimized out>,
resolution_file=resolution_file@entry=0x5300020, count=count@entry=0x7fefffd98)
at /home/markus/gcc/gcc/lto/lto.c:2391
#8 0x00000000004d268b in read_cgraph_and_symbols (fnames=<optimized out>,
nfiles=1) at /home/markus/gcc/gcc/lto/lto.c:2966
#9 lto_main () at /home/markus/gcc/gcc/lto/lto.c:3370
#10 0x000000000082aa46 in compile_file () at /home/markus/gcc/gcc/toplev.c:545
#11 0x000000000082c96a in do_compile () at /home/markus/gcc/gcc/toplev.c:1884
#12 toplev_main (argc=17, argv=0x521ab00) at /home/markus/gcc/gcc/toplev.c:1960
#13 0x0000000004ecd885 in __libc_start_main (main=0xd0af50 <main(int, char**)>,
argc=17, ubp_av=0x7feffff18, init=<optimized out>, fini=<optimized out>,
rtld_fini=<optimized out>, stack_end=0x7feffff08) at libc-start.c:258
#14 0x00000000004b07e9 in _start () at ../sysdeps/x86_64/start.S:123
(gdb) p *slot
$1 = (void *) 0xa5a5a5a5a5a5a5a5
(gdb) p *mp
$2 = {base = {from = 0x5941dc8}, to = 2655783743}
(gdb) p slot
$3 = (void **) 0x4031e98
(gdb) p mp
$4 = (tree_int_map *) 0x593b620
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@ 2013-10-14 9:24 ` rguenth at gcc dot gnu.org
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From: rguenth at gcc dot gnu.org @ 2013-10-14 9:24 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55358
--- Comment #11 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Mon Oct 14 09:24:36 2013
New Revision: 203517
URL: http://gcc.gnu.org/viewcvs?rev=203517&root=gcc&view=rev
Log:
2013-10-14 Richard Biener <rguenther@suse.de>
PR middle-end/58712
PR middle-end/55358
* gimple.c (iterative_hash_canonical_type): Make sure to
record the hash into the correct hashtable slot.
Modified:
trunk/gcc/ChangeLog
trunk/gcc/gimple.c
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