| // Test various levels of coverage |
| // |
| // RUN: %clangxx_msan -DINIT_VAR=1 -O1 -fsanitize-coverage=func,trace-pc-guard %s -o %t |
| // RUN: mkdir -p %t-dir |
| // RUN: MSAN_OPTIONS=coverage=1:verbosity=1:coverage_dir=%t-dir %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK_NOWARN |
| // RUN: %clangxx_msan -O1 -fsanitize-coverage=func,trace-pc-guard %s -o %t |
| // RUN: MSAN_OPTIONS=coverage=1:verbosity=1:coverage_dir=%t-dir not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK_WARN |
| // RUN: %clangxx_msan -O1 -fsanitize-coverage=bb,trace-pc-guard %s -o %t |
| // RUN: MSAN_OPTIONS=coverage=1:verbosity=1:coverage_dir=%t-dir not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK2 --check-prefix=CHECK_WARN |
| // RUN: %clangxx_msan -O1 -fsanitize-coverage=edge,trace-pc-guard %s -o %t |
| // RUN: MSAN_OPTIONS=coverage=1:verbosity=1:coverage_dir=%t-dir not %run %t 2>&1 | FileCheck %s --check-prefix=CHECK3 --check-prefix=CHECK_WARN |
| |
| volatile int sink; |
| int main(int argc, char **argv) { |
| int var; |
| #if INIT_VAR |
| var = 0; |
| #endif |
| if (argc == 0) |
| sink = 0; |
| return *(volatile int*)&var; |
| } |
| |
| // CHECK_WARN: WARNING: MemorySanitizer: use-of-uninitialized-value |
| // CHECK_NOWARN-NOT: ERROR |
| // CHECK1: 1 PCs written |
| // CHECK2: 1 PCs written |
| // CHECK3: 2 PCs written |
