compiler-rt/test/rtsan/blocking_call.cpp

   1 // RUN: %clangxx -fsanitize=realtime %s -o %t
   2 // RUN: not %run %t 2>&1 | FileCheck %s
   3 // UNSUPPORTED: ios
   4
   5 // Intent: Check that a function marked with [[clang::nonblocking]] cannot call a function that is blocking.
   6
   7 #include <stdio.h>
   8 #include <stdlib.h>
   9
  10 void custom_blocking_function() [[clang::blocking]] {
  11   printf("In blocking function\n");
  12 }
  13
  14 void realtime_function() [[clang::nonblocking]] { custom_blocking_function(); }
  15 void nonrealtime_function() { custom_blocking_function(); }
  16
  17 int main() {
  18   nonrealtime_function();
  19   realtime_function();
  20   return 0;
  21 }
  22
  23 // CHECK: ==ERROR: RealtimeSanitizer: blocking-call
  24 // CHECK-NEXT: Call to blocking function `custom_blocking_function()` in real-time context!
  25 // CHECK-NEXT: {{.*custom_blocking_function*}}
  26 // CHECK-NEXT: {{.*realtime_function*}}
  27
  28 // should only occur once
  29 // CHECK-NOT: ==ERROR: RealtimeSanitizer: blocking-call