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From: "dcb314 at hotmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c/94187] New: valgrind error in count_nonzero_bytes ?
Date: Mon, 16 Mar 2020 08:10:07 +0000 [thread overview]
Message-ID: <bug-94187-4@http.gcc.gnu.org/bugzilla/> (raw)
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=94187
Bug ID: 94187
Summary: valgrind error in count_nonzero_bytes ?
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: dcb314 at hotmail dot com
Target Milestone: ---
For this C code:
int
foo (void)
{
return *(int *) "";
}
I ran the code through a valgrind version of recent gcc trunk,
with the compiler flag -O2, and got this:
./gcc.dg/pr68785.c
==49861== Invalid read of size 1
==49861== at 0xD9CDDD: count_nonzero_bytes(tree_node*, unsigned long,
unsigned long, unsigned int*, bool*, bool*, bool*, vr_values const*,
ssa_name_limit_t&) (tree-ssa-strlen.c:4891)
==49861== by 0xD9CF17: count_nonzero_bytes(tree_node*, unsigned long,
unsigned long, unsigned int*, bool*, bool*, bool*, vr_values const*,
ssa_name_limit_t&) (tree-ssa-strlen.c:4801)
==49861== by 0xDA19EE: count_nonzero_bytes (tree-ssa-strlen.c:4920)
==49861== by 0xDA19EE: handle_integral_assign(gimple_stmt_iterator*, bool*,
vr_values const*) (tree-ssa-strlen.c:5547)
This bug is strongly related to bug # 68785.
next reply other threads:[~2020-03-16 8:10 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-16 8:10 dcb314 at hotmail dot com [this message]
2020-03-16 10:51 ` [Bug tree-optimization/94187] " marxin at gcc dot gnu.org
2020-03-16 11:18 ` dcb314 at hotmail dot com
2020-03-16 11:20 ` jakub at gcc dot gnu.org
2020-03-16 11:28 ` jakub at gcc dot gnu.org
2020-03-16 11:35 ` [Bug tree-optimization/94187] [10 Regression] valgrind error in count_nonzero_bytes since r10-2101 jakub at gcc dot gnu.org
2020-03-16 11:40 ` jakub at gcc dot gnu.org
2020-03-16 12:07 ` dcb314 at hotmail dot com
2020-03-16 21:04 ` dcb314 at hotmail dot com
2020-03-17 8:38 ` marxin at gcc dot gnu.org
2020-03-17 8:52 ` dcb314 at hotmail dot com
2020-03-17 9:44 ` cvs-commit at gcc dot gnu.org
2020-03-17 9:54 ` jakub at gcc dot gnu.org
2020-03-25 16:08 ` dcb314 at hotmail dot com
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