[libFuzzer] Simplify test to work on windows.

[mpividori]

Summary

Environment variables are handled differently on Windows.
In this case it is not necessary to use environment variables. So, I simplify the test to work on Windows.

[kcc]

nope. this way the test will race with other tests that will create sancov files in $PWD

The test as is is also not very good. Instead of BUILDDIR it should be using ASAN_OPTIONS=coverage_dir=PATH or some such

[mpividori]

@kcc Let me know if you agree with this new diff.
Thanks.

[kcc]

lib/Fuzzer/test/dump_coverage.test

4 ↗

(On Diff #87308)

use env ASAN_OPTIONS=coverage_dir='"%t_workdir"' in all the lines below to avoid races on output files.

[kcc]

LGTM

llvm/trunk/lib/Fuzzer/test/dump_coverage.test

-RUN: DIR=%t_workdir
-RUN: BUILD_DIR=$(pwd)
-RUN: rm -rf $DIR && mkdir -p $DIR && cd $DIR
-RUN: not $BUILD_DIR/LLVMFuzzer-NullDerefTest -dump_coverage=1 2>&1 | FileCheck %s
-RUN: ls *.sancov | xargs sancov -covered-functions $BUILD_DIR/LLVMFuzzer-NullDerefTest* | FileCheck %s --check-prefix=SANCOV
-RUN: $BUILD_DIR/LLVMFuzzer-DSOTest -dump_coverage=1 -runs=0 2>&1 | FileCheck %s --check-prefix=DSO
-RUN: not $BUILD_DIR/LLVMFuzzer-NullDerefTest -dump_coverage=0 2>&1 | FileCheck %s --check-prefix=NOCOV
-RUN: rm -rf $DIR
+RUN: rm -rf %t_workdir && mkdir -p %t_workdir
+RUN: env ASAN_OPTIONS=coverage_dir='"%t_workdir"' not LLVMFuzzer-NullDerefTest -dump_coverage=1 2>&1 | FileCheck %s
+RUN: xargs sancov -covered-functions LLVMFuzzer-NullDerefTest* %t_workdir/*.sancov | FileCheck %s --check-prefix=SANCOV
+RUN: env ASAN_OPTIONS=coverage_dir='"%t_workdir"' LLVMFuzzer-DSOTest -dump_coverage=1 -runs=0 2>&1 | FileCheck %s --check-prefix=DSO
+RUN: env ASAN_OPTIONS=coverage_dir='"%t_workdir"' not LLVMFuzzer-NullDerefTest -dump_coverage=0 2>&1 | FileCheck %s --check-prefix=NOCOV
 
-
-CHECK: SanitizerCoverage: ./LLVMFuzzer-NullDerefTest.{{.*}}.sancov {{.*}} PCs written
+CHECK: SanitizerCoverage: {{.*}}LLVMFuzzer-NullDerefTest.{{.*}}.sancov {{.*}} PCs written
 SANCOV: LLVMFuzzerTestOneInput
 
-DSO: SanitizerCoverage: ./LLVMFuzzer-DSOTest.{{.*}}.sancov {{.*}} PCs written
+DSO: SanitizerCoverage: {{.*}}LLVMFuzzer-DSOTest.{{.*}}.sancov {{.*}} PCs written
 DSO-DAG: SanitizerCoverage: {{.*}}LLVMFuzzer-DSO1.{{.*}}.sancov {{.*}} PCs written
 DSO-DAG: SanitizerCoverage: {{.*}}LLVMFuzzer-DSO2.{{.*}}.sancov {{.*}} PCs written
 
 NOCOV-NOT: SanitizerCoverage: {{.*}} PCs written