I noticed that this part of the build was taking much longer than
expected. Turns out it's due to not running the subdirs in parallel.
Reduces `make all` inside lib/libclang_rt time from 63s to 20s with -j32.
Reviewed By: dim
Differential Revision: https://reviews.freebsd.org/D26623
It turns out that parts of the common sanitizer code still do not
compile for arm and aarch64, at least not on FreeBSD, so for now those
are all limited to amd64, and sometimes i386.
There's no reason why a special case needs to be added specifically for amd64,
arm, and i386, as the code is written in machine architecture agnostic C/C++.
This will make it possible for all supporting clang architectures to produce
runtime coverage with `--coverage`.
MFC after: 2 weeks
Reviewed by: dim
Differential Revision: https://reviews.freebsd.org/D20003
contains the libraries for Address Sanitizer (asan), Undefined Behavior
Sanitizer (ubsan) and Profile Guided Optimization.
ASan is a fast memory error detector. It can detect the following types
of bugs:
Out-of-bounds accesses to heap, stack and globals
Use-after-free
Use-after-return (to some extent)
Double-free, invalid free
Memory leaks (experimental)
Typical slowdown introduced by AddressSanitizer is 2x.
UBSan is a fast and compatible undefined behavior checker. It enables a
number of undefined behavior checks that have small runtime cost and no
impact on address space layout or ABI.
PLEASE NOTE: the sanitizers still have some rough edges on FreeBSD,
particularly on i386. These will hopefully be smoothed out in the
coming time.
Differential Revision: https://reviews.freebsd.org/D1505
sanitizer libraries that already work on FreeBSD:
* asan: Address Sanitizer
* ubsan: Undefined Behavior Sanitizer
* profile: Profile Guided Optimization support
Please note that these libraries are *experimental* at this stage, so
the main Makefile is not yet connected to the build.
Since I didn't want to needlessly edit BSD.usr.dist, you will also have
to create the install directory /usr/lib/clang/3.5.0/lib/freebsd
manually for now.
