https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82977
Martin Sebor <msebor at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed|2017-11-13 00:00:00 |2017-11-14
Ever confirmed|0 |1
--- Comment #2 from Martin Sebor <msebor at gcc dot gnu.org> ---
I don't have a sanitizer build but I think it's safe to confirm there's
something wrong based on the Valgrind output below.
$ gcc -O2 -S -Wall pr82977.i -wrapper valgrind
==10920== Memcheck, a memory error detector
==10920== Copyright (C) 2002-2015, and GNU GPL'd, by Julian Seward et al.
==10920== Using Valgrind-3.12.0 and LibVEX; rerun with -h for copyright info
==10920== Command: /ssd/build/gcc-git/gcc/cc1 -fpreprocessed pr82977.i -quiet
-dumpbase pr82977.i -mtune=generic -march=x86-64 -auxbase pr82977 -O2 -Wall -o
pr82977.s
==10920==
In file included from cp-demangle.c:140:
/home/marxin/BIG/buildbot/slave/gcc-master-bootstrap-asan/build/libstdc++-v3/../libiberty/cp-demangle.h:184:1:
warning: ‘cplus_demangle_mangled_name’ declared ‘static’ but never defined
[-Wunused-function]
/home/marxin/BIG/buildbot/slave/gcc-master-bootstrap-asan/build/libstdc++-v3/../libiberty/cp-demangle.h:188:1:
warning: ‘cplus_demangle_type’ declared ‘static’ but never defined
[-Wunused-function]
cp-demangle.c:4323:1: warning: ‘d_print’ defined but not used
[-Wunused-function]
==10920== Invalid read of size 8
==10920== at 0x101C826: hash_map<tree_node*, std::pair<int, unsigned int>,
simple_hashmap_traits<default_hash_traits<tree_node*>, std::pair<int, unsigned
int> > >::put(tree_node* const&, std::pair<int, unsigned int> const&)
(hash-map.h:142)
==10920== by 0x101B8DF: strlen_optimize_stmt(gimple_stmt_iterator*)
(tree-ssa-strlen.c:2972)
==10920== by 0x101BFA8:
strlen_dom_walker::before_dom_children(basic_block_def*)
(tree-ssa-strlen.c:3138)
==10920== by 0x17BB4F9: dom_walker::walk(basic_block_def*) (domwalk.c:308)
==10920== by 0x101C1A5: (anonymous
namespace)::pass_strlen::execute(function*) (tree-ssa-strlen.c:3210)
==10920== by 0xCDD02C: execute_one_pass(opt_pass*) (passes.c:2497)
==10920== by 0xCDD37B: execute_pass_list_1(opt_pass*) (passes.c:2586)
==10920== by 0xCDD3AC: execute_pass_list_1(opt_pass*) (passes.c:2587)
==10920== by 0xCDD404: execute_pass_list(function*, opt_pass*)
(passes.c:2597)
==10920== by 0x92DF5F: cgraph_node::expand() (cgraphunit.c:2139)
==10920== by 0x92E403: expand_all_functions() (cgraphunit.c:2275)
==10920== by 0x92EE87: symbol_table::compile() (cgraphunit.c:2623)
==10920== Address 0x63cd178 is 136 bytes inside a block of size 208 free'd
==10920== at 0x4C2ED4A: free (vg_replace_malloc.c:530)
==10920== by 0x101D837: xcallocator<hash_map<tree_node*, std::pair<int,
unsigned int>, simple_hashmap_traits<default_hash_traits<tree_node*>,
std::pair<int, unsigned int> > >::hash_entry>::data_free(hash_map<tree_node*,
std::pair<int, unsigned int>,
simple_hashmap_traits<default_hash_traits<tree_node*>, std::pair<int, unsigned
int> > >::hash_entry*) (hash-table.h:273)
==10920== by 0x101DE6B: hash_table<hash_map<tree_node*, std::pair<int,
unsigned int>, simple_hashmap_traits<default_hash_traits<tree_node*>,
std::pair<int, unsigned int> > >::hash_entry, xcallocator>::expand()
(hash-table.h:765)
==10920== by 0x101D28B: hash_table<hash_map<tree_node*, std::pair<int,
unsigned int>, simple_hashmap_traits<default_hash_traits<tree_node*>,
std::pair<int, unsigned int> > >::hash_entry,
xcallocator>::find_slot_with_hash(tree_node* const&, unsigned int,
insert_option) (hash-table.h:879)
==10920== by 0x101C7EE: hash_map<tree_node*, std::pair<int, unsigned int>,
simple_hashmap_traits<default_hash_traits<tree_node*>, std::pair<int, unsigned
int> > >::put(tree_node* const&, std::pair<int, unsigned int> const&)
(hash-map.h:137)
==10920== by 0x101B8DF: strlen_optimize_stmt(gimple_stmt_iterator*)
(tree-ssa-strlen.c:2972)
==10920== by 0x101BFA8:
strlen_dom_walker::before_dom_children(basic_block_def*)
(tree-ssa-strlen.c:3138)
==10920== by 0x17BB4F9: dom_walker::walk(basic_block_def*) (domwalk.c:308)
==10920== by 0x101C1A5: (anonymous
namespace)::pass_strlen::execute(function*) (tree-ssa-strlen.c:3210)
==10920== by 0xCDD02C: execute_one_pass(opt_pass*) (passes.c:2497)
==10920== by 0xCDD37B: execute_pass_list_1(opt_pass*) (passes.c:2586)
==10920== by 0xCDD3AC: execute_pass_list_1(opt_pass*) (passes.c:2587)
==10920== Block was alloc'd at
==10920== at 0x4C2FA50: calloc (vg_replace_malloc.c:711)
==10920== by 0x197B203: xcalloc (xmalloc.c:162)
==10920== by 0x101E156: xcallocator<hash_map<tree_node*, std::pair<int,
unsigned int>, simple_hashmap_traits<default_hash_traits<tree_node*>,
std::pair<int, unsigned int> > >::hash_entry>::data_alloc(unsigned long)
(hash-table.h:263)
==10920== by 0x101D765: hash_table<hash_map<tree_node*, std::pair<int,
unsigned int>, simple_hashmap_traits<default_hash_traits<tree_node*>,
std::pair<int, unsigned int> > >::hash_entry,
xcallocator>::alloc_entries(unsigned long) const (hash-table.h:650)
==10920== by 0x101CAD8: hash_table<hash_map<tree_node*, std::pair<int,
unsigned int>, simple_hashmap_traits<default_hash_traits<tree_node*>,
std::pair<int, unsigned int> > >::hash_entry, xcallocator>::hash_table(unsigned
long, bool, bool, mem_alloc_origin) (hash-table.h:586)
==10920== by 0x101C509: hash_map<tree_node*, std::pair<int, unsigned int>,
simple_hashmap_traits<default_hash_traits<tree_node*>, std::pair<int, unsigned
int> > >::hash_map(unsigned long, bool, bool) (hash-map.h:112)
==10920== by 0x101C3EC: __static_initialization_and_destruction_0(int, int)
(tree-ssa-strlen.c:157)
==10920== by 0x101C416: _GLOBAL__sub_I_laststmt (tree-ssa-strlen.c:3235)
==10920== by 0x198A38C: __libc_csu_init (in /ssd/build/gcc-git/gcc/cc1)
==10920== by 0x601438F: (below main) (in /usr/lib64/libc-2.24.so)
==10920==
==10920==
==10920== HEAP SUMMARY:
==10920== in use at exit: 8,264,061 bytes in 11,998 blocks
==10920== total heap usage: 631,542 allocs, 619,544 frees, 289,006,672 bytes
allocated
==10920==
==10920== LEAK SUMMARY:
==10920== definitely lost: 2,480 bytes in 24 blocks
==10920== indirectly lost: 720 bytes in 18 blocks
==10920== possibly lost: 0 bytes in 0 blocks
==10920== still reachable: 8,260,861 bytes in 11,956 blocks
==10920== suppressed: 0 bytes in 0 blocks
==10920== Rerun with --leak-check=full to see details of leaked memory
==10920==
==10920== For counts of detected and suppressed errors, rerun with: -v
==10920== ERROR SUMMARY: 1 errors from 1 contexts (suppressed: 0 from 0)
