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/coverage-levels && mkdir %T/coverage-levels
7// RUN: %clangxx -fsanitize=shift                        -DGOOD_SHIFT=1 -O1 -fsanitize-coverage=func  %s -o %t
8// RUN: %env_ubsan_opts=coverage=1:verbosity=1:coverage_dir='"%T/coverage-levels"' %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  %s -o %t
10// RUN: %env_ubsan_opts=coverage=1:verbosity=1:coverage_dir='"%T/coverage-levels"' %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  %s -o %t
14// RUN: %env_ubsan_opts=coverage=1:verbosity=1:coverage_dir='"%T/coverage-levels"' %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK_NOWARN
15
16// RUN: %clangxx -fsanitize=shift -O1 -fsanitize-coverage=func  %s -o %t
17// RUN: %env_ubsan_opts=coverage=1:verbosity=1:coverage_dir='"%T/coverage-levels"' %run %t 2>&1 | FileCheck %s --check-prefix=CHECK1 --check-prefix=CHECK_WARN
18// RUN: %clangxx -fsanitize=shift -O1 -fsanitize-coverage=bb  %s -o %t
19// RUN: %env_ubsan_opts=coverage=1:verbosity=1:coverage_dir='"%T/coverage-levels"' %run %t 2>&1 | FileCheck %s --check-prefix=CHECK2 --check-prefix=CHECK_WARN
20// RUN: %clangxx -fsanitize=shift -O1 -fsanitize-coverage=edge  %s -o %t
21// RUN: %env_ubsan_opts=coverage=1:verbosity=1:coverage_dir='"%T/coverage-levels"' %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
26volatile int sink;
27int main(int argc, char **argv) {
28  int shift = argc * 32;
29#if GOOD_SHIFT
30  shift = 3;
31#endif
32  if ((argc << shift) == 16)  // False.
33    return 1;
34  return 0;
35}
36
37// CHECK_WARN: shift exponent 32 is too large
38// CHECK_NOWARN-NOT: ERROR
39// FIXME: Currently, coverage instrumentation kicks in after ubsan, so we get
40// more than the minimal number of instrumented blocks.
41// FIXME: Currently, ubsan with -fno-sanitize-recover and w/o asan will fail
42// to dump coverage.
43// CHECK1:  1 PCs written
44// CHECK2:  2 PCs written
45// CHECK3:  2 PCs written
46