compiler-rt/test/ubsan/TestCases/Misc/coverage-levels.cpp

   1 // Test various levels of coverage
   2 //
   3 // FIXME: Port the environment variable logic below for the lit shell.
   4 // REQUIRES: shell
   5 //
   6 // RUN: rm -rf %t-dir && mkdir %t-dir
   7 // RUN: %clangxx -fsanitize=shift                        -DGOOD_SHIFT=1 -O1 -fsanitize-coverage=func,trace-pc-guard  %s -o %t
   8 // RUN: %env_ubsan_opts=coverage=1:verbosity=1:coverage_dir='"%t-dir"' %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK_NOWARN
   9 // RUN: %clangxx -fsanitize=undefined                    -DGOOD_SHIFT=1 -O1 -fsanitize-coverage=func,trace-pc-guard  %s -o %t
  10 // RUN: %env_ubsan_opts=coverage=1:verbosity=1:coverage_dir='"%t-dir"' %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK_NOWARN
  11
  12 // Also works without any sanitizer.
  13 // RUN: %clangxx                                         -DGOOD_SHIFT=1 -O1 -fsanitize-coverage=func,trace-pc-guard  %s -o %t
  14 // RUN: %env_ubsan_opts=coverage=1:verbosity=1:coverage_dir='"%t-dir"' %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK_NOWARN
  15
  16 // RUN: %clangxx -fsanitize=shift -O1 -fsanitize-coverage=func,trace-pc-guard  %s -o %t
  17 // RUN: %env_ubsan_opts=coverage=1:verbosity=1:coverage_dir='"%t-dir"' %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK_WARN
  18 // RUN: %clangxx -fsanitize=shift -O1 -fsanitize-coverage=bb,trace-pc-guard  %s -o %t
  19 // RUN: %env_ubsan_opts=coverage=1:verbosity=1:coverage_dir='"%t-dir"' %run %t 2>&1 | FileCheck %s --check-prefix=CHECK2 --check-prefix=CHECK_WARN
  20 // RUN: %clangxx -fsanitize=shift -O1 -fsanitize-coverage=edge,trace-pc-guard  %s -o %t
  21 // RUN: %env_ubsan_opts=coverage=1:verbosity=1:coverage_dir='"%t-dir"' %run %t 2>&1 | FileCheck %s --check-prefix=CHECK3 --check-prefix=CHECK_WARN
  22
  23 // Coverage is not yet implemented in TSan.
  24 // XFAIL: ubsan-tsan
  25 // UNSUPPORTED: ubsan-standalone-static
  26 // No coverage support
  27 // UNSUPPORTED: target={{.*openbsd.*}}
  28
  29 volatile int sink;
  30 int main(int argc, char **argv) {
  31   int shift = argc * 33;
  32 #if GOOD_SHIFT
  33   shift = 3;
  34 #endif
  35   if ((argc << shift) == 16)  // False.
  36     return 1;
  37   return 0;
  38 }
  39
  40 // CHECK_WARN: shift exponent 33 is too large
  41 // CHECK_NOWARN-NOT: ERROR
  42 // FIXME: Currently, coverage instrumentation kicks in after ubsan, so we get
  43 // more than the minimal number of instrumented blocks.
  44 // FIXME: Currently, ubsan with -fno-sanitize-recover and w/o asan will fail
  45 // to dump coverage.
  46 // CHECK1:  1 PCs written
  47 // CHECK2:  2 PCs written
  48 // CHECK3:  2 PCs written