Discussion:
results of gnulib tests with -fsanitize=thread
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Bruno Haible
2017-05-19 15:16:59 UTC
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Here are the result of a gnulib testdir with
CFLAGS="-O -ggdb -fsanitize=thread".

1) test-*printf-posix[23].sh, test-get-rusage-as fail because the
ThreadSanitizer does not have enough memory for its own operation.

2) test-getgroups blows up (quickly uses more than 6 GB of memory)
and then gets killed by the Linux kernel. dmesg says:
[274463.520311] Out of memory: Kill process 16149 (test-getgroups) score 612 or sacrifice child
[274463.520318] Killed process 16149 (test-getgroups) total-vm:132607169824kB, anon-rss:6662924kB, file-rss:0kB

3) test-idpriv-drop.sh and test-idpriv-droptemp.sh ask for the root password
and then hang indefinitely.

4) test-lock triggers an internal error in the ThreadSanitizer's deadlock detector.

5) test-pthread_sigmask2 leaks a thread.

Conclusion: I would say I won't try this sanitizer option any more in a while.

Bruno


FAIL: test-dprintf-posix2.sh
============================

==17721==ERROR: ThreadSanitizer failed to allocate 0x12000 (73728) bytes of SignalContext (errno: 12)
ERROR: Failed to mmap
FAIL test-dprintf-posix2.sh (exit status: 1)

FAIL: test-fprintf-posix2.sh
============================

==21368==ERROR: ThreadSanitizer failed to allocate 0x12000 (73728) bytes of SignalContext (errno: 12)
ERROR: Failed to mmap
FAIL test-fprintf-posix2.sh (exit status: 1)

FAIL: test-fprintf-posix3.sh
============================

==21390==ERROR: ThreadSanitizer failed to allocate 0x12000 (73728) bytes of SignalContext (errno: 12)
ERROR: Failed to mmap
FAIL test-fprintf-posix3.sh (exit status: 1)

FAIL: test-get-rusage-as
========================

==22087==ERROR: ThreadSanitizer failed to allocate 0x12000 (73728) bytes of SignalContext (errno: 12)
ERROR: Failed to mmap
FAIL test-get-rusage-as (exit status: 1)

FAIL: test-getgroups
====================

FAIL test-getgroups (exit status: 137)

FAIL: test-idpriv-drop.sh
=========================

Terminated
FAIL test-idpriv-drop.sh (exit status: 1)

FAIL: test-idpriv-droptemp.sh
=============================

Terminated
FAIL test-idpriv-droptemp.sh (exit status: 1)

FAIL: test-lock
===============

Starting test_lock ... OK
Starting test_rwlock ... OK
Starting test_recursive_lock ... OK
Starting test_once ...FATAL: ThreadSanitizer CHECK failed: ../../../../src/libsanitizer/sanitizer_common/sanitizer_deadlock_detector.h:67 "((n_all_locks_)) < (((sizeof(all_locks_with_contexts_)/sizeof((all_locks_with_contexts_)[0]))))" (0x40, 0x40)
#0 <null> <null> (libtsan.so.0+0x000000075193)
#1 <null> <null> (libtsan.so.0+0x00000007519b)
#2 __sanitizer::CheckFailed(char const*, int, char const*, unsigned long long, unsigned long long) <null> (libtsan.so.0+0x000000079d13)
#3 <null> <null> (libtsan.so.0+0x00000007dafd)
#4 <null> <null> (libtsan.so.0+0x000000071b95)
#5 pthread_rwlock_wrlock <null> (libtsan.so.0+0x000000028e95)
#6 test_once ../../gltests/test-lock.c:646 (test-lock+0x0000004025c8)
#7 main ../../gltests/test-lock.c:738 (test-lock+0x0000004025c8)
#8 __libc_start_main <null> (libc.so.6+0x00000002082f)
#9 _start <null> (test-lock+0x000000401768)

FAIL test-lock (exit status: 1)

FAIL: test-printf-posix2.sh
===========================

==21938==ERROR: ThreadSanitizer failed to allocate 0x12000 (73728) bytes of SignalContext (errno: 12)
ERROR: Failed to mmap
FAIL test-printf-posix2.sh (exit status: 1)

FAIL: test-pthread_sigmask2
===========================

==================
WARNING: ThreadSanitizer: thread leak (pid=21976)
Thread T1 (tid=21978, finished) created by main thread at:
#0 pthread_create <null> (libtsan.so.0+0x000000027577)
#1 main ../../gltests/test-pthread_sigmask2.c:70 (test-pthread_sigmask2+0x0000004015bb)

SUMMARY: ThreadSanitizer: thread leak ??:0 __interceptor_pthread_create
==================
ThreadSanitizer: reported 1 warnings
FAIL test-pthread_sigmask2 (exit status: 66)

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