[ubsan] lit changes for lld testing, future lto testing.

Summary:
As discussed in https://github.com/google/oss-fuzz/issues/933,
it would be really awesome to be able to use ThinLTO for fuzzing.
However, as @kcc has pointed out, it is currently undefined (untested)
whether the sanitizers actually function properly with LLD and/or LTO.

This patch is inspired by the cfi test, which already do test with LTO
(and/or LLD), since LTO is required for CFI to function.

I started with UBSan, because it's cmakelists / lit.* files appeared
to be the cleanest. This patch adds the infrastructure to easily add
LLD and/or LTO sub-variants of the existing lit test configurations.

Also, this patch adds the LLD flavor, that explicitly does use LLD to link.
The check-ubsan does pass on my machine. And to minimize the [initial]
potential buildbot breakage i have put some restrictions on this flavour.

Please review carefully, i have not worked with lit/sanitizer tests before.

Reviewers: eugenis, vitalybuka

Reviewed By: eugenis

Subscribers: #sanitizers, pcc, kubamracek, mgorny, llvm-commits, mehdi_amini, inglorion, kcc

Differential Revision: https://reviews.llvm.org/D39508

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@319525 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 1 insertions, 1 deletions

diff --git a/test/scudo/lit.cfg b/test/scudo/lit.cfg
index 2f6469d25..028bf721b 100644
--- a/test/scudo/lit.cfg
+++ b/test/scudo/lit.cfg
@@ -36,7 +36,7 @@ if not config.android:
 cxx_flags = (c_flags + config.cxx_mode_flags + ["-std=c++11"])
 
 def build_invocation(compile_flags):                                            
-  return " " + " ".join([config.compile_wrapper, config.clang] + compile_flags) + " "                   
+  return " " + " ".join([config.clang] + compile_flags) + " "
 
 # Add clang substitutions.
 config.substitutions.append(("%clang ", build_invocation(c_flags)))