compiler-rt/test/dfsan/trace-cmp.c

   1 // Checks that dfsan works with trace-cmp instrumentation, even if some hooks
   2 // are not defined (relies on week hooks implemented in dfsan).
   3 //
   4 // RUN: %clang_dfsan -fsanitize-coverage=trace-pc-guard,pc-table,func,trace-cmp %s -o %t
   5 // RUN: %run %t 2>&1 | FileCheck %s
   6
   7 #include <stdio.h>
   8 #include <stdint.h>
   9 #include <stdlib.h>
  10
  11 #include <sanitizer/dfsan_interface.h>
  12
  13 uint32_t a4, b4;
  14 uint64_t a8, b8;
  15
  16 // Define just two hooks, and leave others undefined.
  17 void __dfsw___sanitizer_cov_trace_const_cmp4(uint8_t a, uint8_t b,
  18                                              dfsan_label l1, dfsan_label l2) {
  19   printf("const_cmp4 %d %d\n", a, b);
  20 }
  21 void __dfsw___sanitizer_cov_trace_cmp8(uint8_t a, uint8_t b, dfsan_label l1,
  22                                        dfsan_label l2) {
  23   printf("cmp8 %d %d\n", a, b);
  24 }
  25
  26 int main(int argc, char **argv) {
  27   printf("MAIN\n");
  28   // CHECK: MAIN
  29
  30   if (a4 != b4) abort();
  31   if (a4 == 42) abort();
  32   // CHECK: const_cmp4 42 0
  33   if (a8 != b8) abort();
  34   // CHECK: cmp8 0 0
  35   if (a8 == 66) abort();
  36
  37   switch (10 / (a4 + 2)) {
  38     case 1: abort();
  39     case 2: exit(1);
  40     case 5:
  41             printf("SWITCH OK\n");
  42             break;
  43   }
  44   // CHECK: SWITCH OK
  45
  46
  47   printf("DONE\n");
  48   // CHECK: DONE
  49   return 0;
  50 }