llvm-project/compiler-rt/test/fuzzer/merge.test

RUN: %cpp_compiler %S/FullCoverageSetTest.cpp -o %t-FullCoverageSetTest

RUN: rm -rf %t/T0 %t/T1 %t/T2
RUN: mkdir -p %t/T0 %t/T1 %t/T2
RUN: echo F..... > %t/T0/1
RUN: echo .U.... > %t/T0/2
RUN: echo ..Z... > %t/T0/3

# T1 has 3 elements, T2 is empty.
RUN: cp %t/T0/* %t/T1/
RUN: %run %t-FullCoverageSetTest         -merge=1 %t/T1 %t/T2 2>&1 | FileCheck %s --check-prefix=CHECK1
CHECK1: MERGE-OUTER: 3 files, 3 in the initial corpus
CHECK1: MERGE-OUTER: 0 new files with 0 new features added

RUN: echo ...Z.. > %t/T2/1
RUN: echo ....E. > %t/T2/2
RUN: echo .....R > %t/T2/3
RUN: echo F..... > %t/T2/a
RUN: echo .U.... > %t/T2/b
RUN: echo ..Z... > %t/T2/c

# T1 has 3 elements, T2 has 6 elements, only 3 are new.
RUN: %run %t-FullCoverageSetTest         -merge=1 %t/T1 %t/T2 2>&1 | FileCheck %s --check-prefix=CHECK2
CHECK2: MERGE-OUTER: 9 files, 3 in the initial corpus
CHECK2: MERGE-OUTER: 3 new files with 3 new features added

# Now, T1 has 6 units and T2 has no new interesting units.
RUN: %run %t-FullCoverageSetTest         -merge=1 %t/T1 %t/T2 2>&1 | FileCheck %s --check-prefix=CHECK3
CHECK3: MERGE-OUTER: 12 files, 6 in the initial corpus
CHECK3: MERGE-OUTER: 0 new files with 0 new features added

# Check that we respect max_len during the merge and don't crash.
RUN: rm %t/T1/*
RUN: cp %t/T0/* %t/T1/
RUN: echo looooooooong > %t/T2/looooooooong
RUN: %run %t-FullCoverageSetTest         -merge=1 %t/T1 %t/T2 -max_len=6 2>&1 | FileCheck %s --check-prefix=MAX_LEN
MAX_LEN: MERGE-OUTER: 3 new files

# Check that we respect -merge_control_file=FILE
RUN: rm %t/T1/*
RUN: cp %t/T0/* %t/T1/
RUN: rm -f %t/MCF
RUN: %run %t-FullCoverageSetTest -merge=1 -merge_control_file=%t/MCF %t/T1 %t/T2 2>&1 | FileCheck %s --check-prefix=MCF
RUN: grep STARTED %t/MCF
RUN: grep FT %t/MCF
MCF: MERGE-INNER: using the control file {{.*}}MCF
MCF: MERGE-OUTER: 3 new files


# Check that merge tolerates failures.
RUN: rm %t/T1/*
RUN: cp %t/T0/* %t/T1/
RUN: echo 'FUZZER' > %t/T2/FUZZER
RUN: %run %t-FullCoverageSetTest -merge=1 %t/T1 %t/T2 2>&1 | FileCheck %s --check-prefix=MERGE_WITH_CRASH
MERGE_WITH_CRASH: MERGE-OUTER: successful in 2 attempt(s)
MERGE_WITH_CRASH: MERGE-OUTER: 3 new files

# Check that we actually limit the size with max_len
RUN: rm %t/T1/* %t/T2/*
RUN: echo 'FUZZER' > %t/T2/FUZZER
RUN: %run %t-FullCoverageSetTest -merge=1 %t/T1 %t/T2  -max_len=5 2>&1 | FileCheck %s --check-prefix=MERGE_LEN5
RUN: not grep FUZZER %t/T1/*
RUN: grep FUZZE %t/T1/*
MERGE_LEN5: MERGE-OUTER: successful in 1 attempt(s)