29 lines · cpp
1// Test various levels of coverage2//3// RUN: %clangxx_msan -DINIT_VAR=1 -O1 -fsanitize-coverage=func,trace-pc-guard %s -o %t4// RUN: mkdir -p %t-dir5// RUN: env MSAN_OPTIONS=coverage=1:verbosity=1:coverage_dir=%t-dir %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK_NOWARN6// RUN: %clangxx_msan -O1 -fsanitize-coverage=func,trace-pc-guard %s -o %t7// RUN: env MSAN_OPTIONS=coverage=1:verbosity=1:coverage_dir=%t-dir not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK_WARN8// RUN: %clangxx_msan -O1 -fsanitize-coverage=bb,trace-pc-guard %s -o %t9// RUN: env MSAN_OPTIONS=coverage=1:verbosity=1:coverage_dir=%t-dir not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK2 --check-prefix=CHECK_WARN10// RUN: %clangxx_msan -O1 -fsanitize-coverage=edge,trace-pc-guard %s -o %t11// RUN: env MSAN_OPTIONS=coverage=1:verbosity=1:coverage_dir=%t-dir not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK3 --check-prefix=CHECK_WARN12 13volatile int sink;14int main(int argc, char **argv) {15 int var;16#if INIT_VAR17 var = 0;18#endif19 if (argc == 0)20 sink = 0;21 return *(volatile int*)&var;22}23 24// CHECK_WARN: WARNING: MemorySanitizer: use-of-uninitialized-value25// CHECK_NOWARN-NOT: ERROR26// CHECK1: 1 PCs written27// CHECK2: 1 PCs written28// CHECK3: 2 PCs written29