1// Test various levels of coverage
2//
3// RUN: %clangxx_msan -DINIT_VAR=1 -O1 -fsanitize-coverage=func  %s -o %t
4// RUN: mkdir -p %T/coverage-levels
5// RUN: MSAN_OPTIONS=coverage=1:verbosity=1:coverage_dir=%T/coverage-levels %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK_NOWARN
6// RUN: %clangxx_msan -O1 -fsanitize-coverage=func  %s -o %t
7// RUN: MSAN_OPTIONS=coverage=1:verbosity=1:coverage_dir=%T/coverage-levels not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK_WARN
8// RUN: %clangxx_msan -O1 -fsanitize-coverage=bb  %s -o %t
9// RUN: MSAN_OPTIONS=coverage=1:verbosity=1:coverage_dir=%T/coverage-levels not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK2 --check-prefix=CHECK_WARN
10// RUN: %clangxx_msan -O1 -fsanitize-coverage=edge  %s -o %t
11// RUN: MSAN_OPTIONS=coverage=1:verbosity=1:coverage_dir=%T/coverage-levels not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK3 --check-prefix=CHECK_WARN
12//
13volatile int sink;
14int main(int argc, char **argv) {
15  int var;
16#if INIT_VAR
17  var = 0;
18#endif
19  if (argc == 0)
20    sink = 0;
21  return *(volatile int*)&var;
22}
23
24// CHECK_WARN: WARNING: MemorySanitizer: use-of-uninitialized-value
25// CHECK_NOWARN-NOT: ERROR
26// CHECK1:  1 PCs written
27// CHECK2:  1 PCs written
28// CHECK3:  2 PCs written
29