[CTU] Eliminate race condition in CTU lit tests

[martong]

Summary

We plan to introduce additional CTU related lit test. Since lit may run the
tests in parallel, it is not safe to use the same directory (%T) for these
tests. It is safe to use however test case specific directories (%t).

[a_sidorin]

Hi Gabor,
Yes, the %T variable is obsolete, but it looks like the Guide recommendations are not entirely fulfilled.

test/Analysis/ctu-main.cpp

1–12

The Testing Infrastructure Guide recommends to use rm -rf %t && mkdir %t.

[xazax.hun]

After the review comment is resolved, the rest LGTM!

[martong]

• Use rm, mkdir and break long RUN lines

test/Analysis/ctu-main.cpp

-// RUN: mkdir -p %T/ctudir
-// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -emit-pch -o %T/ctudir/ctu-other.cpp.ast %S/Inputs/ctu-other.cpp
-// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -emit-pch -o %T/ctudir/ctu-chain.cpp.ast %S/Inputs/ctu-chain.cpp
-// RUN: cp %S/Inputs/externalFnMap.txt %T/ctudir/
-// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -fsyntax-only -analyze -analyzer-checker=core,debug.ExprInspection -analyzer-config experimental-enable-naive-ctu-analysis=true -analyzer-config ctu-dir=%T/ctudir -verify %s
+// RUN: rm -rf %t && mkdir %t
+// RUN: mkdir -p %t/ctudir
+// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu \
+// RUN:   -emit-pch -o %t/ctudir/ctu-other.cpp.ast %S/Inputs/ctu-other.cpp
+// RUN: %clang_cc1 -triple x86_64-pc-linux-gnu \
+// RUN:   -emit-pch -o %t/ctudir/ctu-chain.cpp.ast %S/Inputs/ctu-chain.cpp
+// RUN: cp %S/Inputs/externalFnMap.txt %t/ctudir/
+// RUN: %clang_analyze_cc1 -triple x86_64-pc-linux-gnu \
+// RUN:   -analyzer-checker=core,debug.ExprInspection \
+// RUN:   -analyzer-config experimental-enable-naive-ctu-analysis=true \
+// RUN:   -analyzer-config ctu-dir=%t/ctudir \
+// RUN:   -verify %s
 
 #include "ctu-hdr.h"
 
 void clang_analyzer_eval(int);
 
 int f(int);
 int g(int);
 int h(int);