1// Test various levels of coverage
2//
3// RUN: mkdir -p %T/coverage-levels
4// RUN: OPT=coverage=1:verbosity=1:coverage_dir=%T/coverage-levels
5// RUN: %clangxx -fsanitize=shift                        -DGOOD_SHIFT=1 -O1 -fsanitize-coverage=1  %s -o %t
6// RUN: UBSAN_OPTIONS=$OPT %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK_NOWARN
7// RUN: %clangxx -fsanitize=undefined                    -DGOOD_SHIFT=1 -O1 -fsanitize-coverage=1  %s -o %t
8// RUN: UBSAN_OPTIONS=$OPT %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK_NOWARN
9
10// RUN: %clangxx -fsanitize=shift -O1 -fsanitize-coverage=1  %s -o %t
11// RUN: UBSAN_OPTIONS=$OPT %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK_WARN
12// RUN: %clangxx -fsanitize=shift -O1 -fsanitize-coverage=2  %s -o %t
13// RUN: UBSAN_OPTIONS=$OPT %run %t 2>&1 | FileCheck %s --check-prefix=CHECK2 --check-prefix=CHECK_WARN
14// RUN: %clangxx -fsanitize=shift -O1 -fsanitize-coverage=3  %s -o %t
15// RUN: UBSAN_OPTIONS=$OPT %run %t 2>&1 | FileCheck %s --check-prefix=CHECK3 --check-prefix=CHECK_WARN
16
17volatile int sink;
18int main(int argc, char **argv) {
19  int shift = argc * 32;
20#if GOOD_SHIFT
21  shift = 3;
22#endif
23  if ((argc << shift) == 16)  // False.
24    return 1;
25  return 0;
26}
27
28// CHECK_WARN: shift exponent 32 is too large
29// CHECK_NOWARN-NOT: ERROR
30// FIXME: Currently, coverage instrumentation kicks in after ubsan, so we get
31// more than the minimal number of instrumented blocks.
32// FIXME: Currently, ubsan with -fno-sanitize-recover and w/o asan will fail
33// to dump coverage.
34// CHECK1:  1 PCs written
35// CHECK2:  3 PCs written
36// CHECK3:  4 PCs written
37