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34c823f147
This commit allows to enable sanitizers with autoconf options, instead
of modifying `CFLAGS`, `CXXFLAGS` and `LDFLAGS` directly.
* `--enable-tsan` option to enable Thread Sanitizer.
* `--enable-ubsan` option to enable Undefined Behaviour Sanitizer.
End goal is to speedup development by finding problems quickly, early
and easier. Eventually, when all current issues will be fixed, we can
enable sanitizers in CI. Fortunately, there are not a lot of problems we
need to fix.
Address Sanitizer is a bit controversial, because it replaces memory
allocator, so we decided to left it out for a while.
Below are couple of examples of how tests look like under different
sanitizers at the moment.
```
$ ../configure --enable-tsan --enable-debug
<...>
asan : 0
tsan : 1
ubsan : 0
$ make -j`nproc` check
<...>
Thread T13 (tid=332043, running) created by main thread at:
#0 pthread_create <null> (libtsan.so.0+0x61748)
#1 thd_create ../test/src/thd.c:25 (bin_batching+0x5631ca)
#2 stress_run ../test/unit/bin_batching.c:148
(bin_batching+0x40364c)
#3 test_races ../test/unit/bin_batching.c:249
(bin_batching+0x403d79)
#4 p_test_impl ../test/src/test.c:149 (bin_batching+0x562811)
#5 p_test_no_reentrancy ../test/src/test.c:213
(bin_batching+0x562d35)
#6 main ../test/unit/bin_batching.c:268 (bin_batching+0x40417e)
SUMMARY: ThreadSanitizer: data race
../include/jemalloc/internal/edata.h:498 in edata_nfree_inc
```
```
$ ../configure --enable-ubsan --enable-debug
<...>
asan : 0
tsan : 0
ubsan : 1
$ make -j`nproc` check
<...>
=== test/unit/hash ===
../test/unit/hash.c:119:16: runtime error: left shift of 176 by 24
places cannot be represented in type 'int'
<...>
```
jemalloc is a general purpose malloc(3) implementation that emphasizes fragmentation avoidance and scalable concurrency support. jemalloc first came into use as the FreeBSD libc allocator in 2005, and since then it has found its way into numerous applications that rely on its predictable behavior. In 2010 jemalloc development efforts broadened to include developer support features such as heap profiling and extensive monitoring/tuning hooks. Modern jemalloc releases continue to be integrated back into FreeBSD, and therefore versatility remains critical. Ongoing development efforts trend toward making jemalloc among the best allocators for a broad range of demanding applications, and eliminating/mitigating weaknesses that have practical repercussions for real world applications. The COPYING file contains copyright and licensing information. The INSTALL file contains information on how to configure, build, and install jemalloc. The ChangeLog file contains a brief summary of changes for each release. URL: https://jemalloc.net/