[cfe-dev] leaks in clang (many!)

[Kostya Serebryany]

Hi,

TL;DR: there are tons of leaks in Clang, please help us fix them.

We have a build
bot<http://lab.llvm.org:8011/builders/sanitizer-x86_64-linux-bootstrap>
that
runs clang bootstrap under
AddressSanitizer<http://clang.llvm.org/docs/AddressSanitizer.html>
 (ASan).
LeakSanitizer <http://clang.llvm.org/docs/LeakSanitizer.html> (LSan, a leak
detector that runs as part of ASan) is enabled on that bot,
but as we've learned today only on part of the bootstrap actually runs LSan.
LSan is enabled by the env. var ASAN_OPTIONS=detect_leaks=1 and we have
this env. var. set on the bot so the 3-rd stage build uses it.
However the lit runner clears the environment and the lit
tests were not running under lsan until today, when I tried to enable lsan
by default.

This has discovered tons of leaks and I reverted the change.
The leaks happen in various modes that are not exercised during regular
self-compilation on linux,
e.g. static analyzer, -emit-llvm, Windows ABI, etc.
I've filed a few bugs (19520 19522 19523 19524) but there are dozens more
reports left.

If you care about leaks in clang, please check
http://llvm.org/bugs/attachment.cgi?id=12423
and see if any of these leaks are in your code.

Thanks,

--kcc
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