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[Bug sanitizer/77963] New: inconsistent (false?) leaks detection.
- From: "pawel_sikora at zoho dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 13 Oct 2016 08:33:10 +0000
- Subject: [Bug sanitizer/77963] New: inconsistent (false?) leaks detection.
- Auto-submitted: auto-generated
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77963
Bug ID: 77963
Summary: inconsistent (false?) leaks detection.
Product: gcc
Version: 6.2.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: pawel_sikora at zoho dot com
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org
Target Milestone: ---
Created attachment 39800
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=39800&action=edit
testcase
hi,
i've observed that running application under gdb/ltrace/strace reports strange
memory leaks, e.g:
% make
g++ -Wall -g2 s.cpp -fsanitize=address -Og -shared -fPIC -o s.so -lboost_thread
g++ -Wall -g2 m.cpp -fsanitize=address -Og -o m ./s.so -ldl
[pawels@pawels]~/ssd/leaks% ./m; echo $?
0
[pawels@pawels]~/ssd/leaks% ltrace ./m
__asan_init(1, 0x7ffddcdce888, 0x7ffddcdce898, 0x7f833ad36540)
= 0
__libc_start_main([ "./m" ] <unfinished ...>
__asan_init(1, 0x7ffddcdce888, 0x7ffddcdce898, 0) = 0
__asan_version_mismatch_check_v6(1, 0x7ffddcdce888, 0x7ffddcdce898, 0) = 0
__asan_register_globals(0x601080, 2, 0x7ffddcdce898, 0) = 0
dlopen("./s.so", 1) = 0x7f833cbabb18
dlsym(0x7f833cbabb18, "foo") = 0x7f833b7e4d20
dlclose(0x7f833cbabb18) = 0
__asan_unregister_globals(0x601080, 2, 0, 1) = 0x80078140
=================================================================
==4777==ERROR: LeakSanitizer: detected memory leaks
Indirect leak of 440 byte(s) in 1 object(s) allocated from:
#0 0x7f833baaeea0 in operator new(unsigned long)
(/lib64/libasan.so.3+0xc7ea0)
#1 0x7f833a33a83d in boost::detail::make_external_thread_data()
(/lib64/libboost_thread.so.1.60.0+0x1283d)
Indirect leak of 24 byte(s) in 1 object(s) allocated from:
#0 0x7f833baaeea0 in operator new(unsigned long)
(/lib64/libasan.so.3+0xc7ea0)
#1 0x7f833a33a9e9 in boost::detail::make_external_thread_data()
(/lib64/libboost_thread.so.1.60.0+0x129e9)
SUMMARY: AddressSanitizer: 464 byte(s) leaked in 2 allocation(s).
+++ exited (status 1) +++