compiler-rt/test/msan/coverage-levels.cpp

   1 // Test various levels of coverage
   2 //
   3 // RUN: %clangxx_msan -DINIT_VAR=1 -O1 -fsanitize-coverage=func,trace-pc-guard  %s -o %t
   4 // RUN: mkdir -p %t-dir
   5 // RUN: MSAN_OPTIONS=coverage=1:verbosity=1:coverage_dir=%t-dir %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK_NOWARN
   6 // RUN: %clangxx_msan -O1 -fsanitize-coverage=func,trace-pc-guard  %s -o %t
   7 // 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
   8 // RUN: %clangxx_msan -O1 -fsanitize-coverage=bb,trace-pc-guard  %s -o %t
   9 // 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
  10 // RUN: %clangxx_msan -O1 -fsanitize-coverage=edge,trace-pc-guard  %s -o %t
  11 // 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
  12
  13 volatile int sink;
  14 int 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