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* [Bug other/67659] New: ICE: Linux kernel/rcu/tree.c:3261:6
@ 2015-09-20 22:34 nwmcsween at gmail dot com
2015-09-21 6:28 ` [Bug other/67659] " ubizjak at gmail dot com
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: nwmcsween at gmail dot com @ 2015-09-20 22:34 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67659
Bug ID: 67659
Summary: ICE: Linux kernel/rcu/tree.c:3261:6
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
Assignee: unassigned at gcc dot gnu.org
Reporter: nwmcsween at gmail dot com
Target Milestone: ---
ICE while compiling linux kernel, at kernel/rcu/tree.c:3261:6 using latest git
as of sunday 2015-09-20
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug other/67659] ICE: Linux kernel/rcu/tree.c:3261:6
2015-09-20 22:34 [Bug other/67659] New: ICE: Linux kernel/rcu/tree.c:3261:6 nwmcsween at gmail dot com
@ 2015-09-21 6:28 ` ubizjak at gmail dot com
2015-09-25 2:54 ` [Bug tree-optimization/67659] [5 regression] ICE: segfault: " trippels at gcc dot gnu.org
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: ubizjak at gmail dot com @ 2015-09-21 6:28 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67659
Uroš Bizjak <ubizjak at gmail dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2015-09-21
Ever confirmed|0 |1
--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Nathan McSween from comment #0)
> ICE while compiling linux kernel, at kernel/rcu/tree.c:3261:6 using latest
> git as of sunday 2015-09-20
Please provide all required information, as instructed in [1].
[1] https://gcc.gnu.org/bugs/
>From gcc-bugs-return-497654-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Mon Sep 21 06:29:56 2015
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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/67662] -fsanitize=undefined cries wolf for X - 1 + X when X is 2**30
Date: Mon, 21 Sep 2015 06:29:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: middle-end
X-Bugzilla-Version: 5.2.0
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X-Bugzilla-Who: pinskia at gcc dot gnu.org
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idg662
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2015-09-21
Component|sanitizer |middle-end
Ever confirmed|0 |1
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This is a reassociation issue inside fold-const. Basically we change x - 1 + x
to x + x - 1 which is invalid as it introduces an overflow which was not there
before. (This is why we need an addition tree where overflow is defined).
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/67659] [5 regression] ICE: segfault: Linux kernel/rcu/tree.c:3261:6
2015-09-20 22:34 [Bug other/67659] New: ICE: Linux kernel/rcu/tree.c:3261:6 nwmcsween at gmail dot com
2015-09-21 6:28 ` [Bug other/67659] " ubizjak at gmail dot com
@ 2015-09-25 2:54 ` trippels at gcc dot gnu.org
2015-09-25 7:30 ` trippels at gcc dot gnu.org
2015-09-25 8:03 ` trippels at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: trippels at gcc dot gnu.org @ 2015-09-25 2:54 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67659
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|WAITING |NEW
CC| |trippels at gcc dot gnu.org
Component|other |tree-optimization
Known to work| |4.9.3, 6.0
Summary|ICE: Linux |[5 regression] ICE:
|kernel/rcu/tree.c:3261:6 |segfault: Linux
| |kernel/rcu/tree.c:3261:6
Known to fail| |5.2.1
--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
markus@x4 tmp % cat tree.i
struct list_head {
struct list_head *next, *prev;
} typedef call_rcu_func_t;
struct __wait_queue_head {
int lock;
struct list_head task_list;
};
struct completion {
int done;
struct __wait_queue_head wait;
};
int call_rcu_sched;
void fn1(unsigned long p1) {
__asm__("" : : : "memory");
if (~0UL / 2 >= p1) {
call_rcu_func_t __crcu_array[] = {call_rcu_sched};
int __n = sizeof({});
struct completion __rs_array[__n];
fn2(0, 1, __crcu_array, __rs_array);
}
}
void fn3(unsigned long p1) {
__asm__("" : : : "memory");
if (~0UL / 2 >= p1) {
call_rcu_func_t __crcu_array[] = {call_rcu_sched};
int __n = sizeof({});
struct completion __rs_array[__n];
fn2(0, 1, __crcu_array, __rs_array);
}
}
markus@x4 tmp % gdb --args gcc -O3 -c -w tree.i
Reading symbols from gcc...done.
(gdb) run
Starting program: /usr/bin/gcc -O3 -c -w tree.i
process 16753 is executing new program:
/usr/x86_64-pc-linux-gnu/gcc-bin/5.2.1/gcc
[New process 16757]
process 16757 is executing new program:
/usr/libexec/gcc/x86_64-pc-linux-gnu/5.2.1/cc1
Program received signal SIGSEGV, Segmentation fault.
[Switching to process 16757]
0x00000000007fce50 in ccp_fold_stmt(gimple_stmt_iterator*) [clone .cold.97] ()
(gdb) bt
#0 0x00000000007fce50 in ccp_fold_stmt(gimple_stmt_iterator*) [clone .cold.97]
()
#1 0x0000000000f509c1 in
substitute_and_fold_dom_walker::before_dom_children(basic_block_def*) ()
#2 0x000000000107f821 in dom_walker::walk(basic_block_def*) ()
#3 0x0000000000f505e1 in substitute_and_fold(tree_node* (*)(tree_node*), bool
(*)(gimple_stmt_iterator*), bool) ()
#4 0x0000000000ee9b2a in (anonymous namespace)::pass_ccp::execute(function*)
()
#5 0x0000000000721a13 in execute_one_pass(opt_pass*) ()
#6 0x0000000000722fb2 in execute_pass_list_1(opt_pass*) ()
#7 0x0000000000722fe3 in execute_pass_list_1(opt_pass*) ()
#8 0x0000000000e34619 in execute_pass_list(function*, opt_pass*) ()
#9 0x0000000001104e27 in symbol_table::compile() ()
#10 0x00000000011045fe in symbol_table::finalize_compilation_unit() ()
#11 0x0000000000c2b473 in c_write_global_declarations() ()
#12 0x0000000001148411 in compile_file() ()
#13 0x0000000000c20831 in toplev::main(int, char**) ()
#14 0x0000000000c20c8e in main ()
-fno-ipa-icf "fixes" the issue.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/67659] [5 regression] ICE: segfault: Linux kernel/rcu/tree.c:3261:6
2015-09-20 22:34 [Bug other/67659] New: ICE: Linux kernel/rcu/tree.c:3261:6 nwmcsween at gmail dot com
2015-09-21 6:28 ` [Bug other/67659] " ubizjak at gmail dot com
2015-09-25 2:54 ` [Bug tree-optimization/67659] [5 regression] ICE: segfault: " trippels at gcc dot gnu.org
@ 2015-09-25 7:30 ` trippels at gcc dot gnu.org
2015-09-25 8:03 ` trippels at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: trippels at gcc dot gnu.org @ 2015-09-25 7:30 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67659
--- Comment #3 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
tree.i:13:6: internal compiler error: Segmentation fault
void fn1(unsigned long p1) {
^
0x99d1ef crash_signal
../../gcc/gcc/toplev.c:383
0xa5cc22 fold_builtin_alloca_with_align
../../gcc/gcc/tree-ssa-ccp.c:2067
0xa5cc22 ccp_fold_stmt
../../gcc/gcc/tree-ssa-ccp.c:2172
0xac6866 substitute_and_fold_dom_walker::before_dom_children(basic_block_def*)
../../gcc/gcc/tree-ssa-propagate.c:1177
0xea6077 dom_walker::walk(basic_block_def*)
../../gcc/gcc/domwalk.c:188
0xac62a9 substitute_and_fold(tree_node* (*)(tree_node*), bool
(*)(gimple_stmt_iterator*), bool)
../../gcc/gcc/tree-ssa-propagate.c:1272
0xa54108 ccp_finalize
../../gcc/gcc/tree-ssa-ccp.c:941
0xa54108 do_ssa_ccp
../../gcc/gcc/tree-ssa-ccp.c:2382
0xa54108 execute
../../gcc/gcc/tree-ssa-ccp.c:2414
Please submit a full bug report,
with preprocessed source if appropriate.
Please include the complete backtrace with any bug report.
See <http://gcc.gnu.org/bugs.html> for instructions.
I think there is a dup somewhere, but I cannot find it at the moment.
^ permalink raw reply [flat|nested] 5+ messages in thread
* [Bug tree-optimization/67659] [5 regression] ICE: segfault: Linux kernel/rcu/tree.c:3261:6
2015-09-20 22:34 [Bug other/67659] New: ICE: Linux kernel/rcu/tree.c:3261:6 nwmcsween at gmail dot com
` (2 preceding siblings ...)
2015-09-25 7:30 ` trippels at gcc dot gnu.org
@ 2015-09-25 8:03 ` trippels at gcc dot gnu.org
3 siblings, 0 replies; 5+ messages in thread
From: trippels at gcc dot gnu.org @ 2015-09-25 8:03 UTC (permalink / raw)
To: gcc-bugs
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67659
Markus Trippelsdorf <trippels at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |DUPLICATE
--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
dup.
*** This bug has been marked as a duplicate of bug 67055 ***
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2015-09-25 8:03 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2015-09-20 22:34 [Bug other/67659] New: ICE: Linux kernel/rcu/tree.c:3261:6 nwmcsween at gmail dot com
2015-09-21 6:28 ` [Bug other/67659] " ubizjak at gmail dot com
2015-09-25 2:54 ` [Bug tree-optimization/67659] [5 regression] ICE: segfault: " trippels at gcc dot gnu.org
2015-09-25 7:30 ` trippels at gcc dot gnu.org
2015-09-25 8:03 ` trippels at gcc dot gnu.org
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