compiler-rt/test/ubsan/TestCases/Pointer/align-assume-attribute-align_value-on-paramvar.cpp

   1 // RUN: %clang   -x c   -fsanitize=alignment -O0 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not=" assumption " --implicit-check-not="note:" --implicit-check-not="runtime error:"
   2 // RUN: %clang   -x c   -fsanitize=alignment -O1 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not=" assumption " --implicit-check-not="note:" --implicit-check-not="runtime error:"
   3 // RUN: %clang   -x c   -fsanitize=alignment -O2 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not=" assumption " --implicit-check-not="note:" --implicit-check-not="runtime error:"
   4 // RUN: %clang   -x c   -fsanitize=alignment -O3 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not=" assumption " --implicit-check-not="note:" --implicit-check-not="runtime error:"
   5
   6 // RUN: %clangxx -x c++ -fsanitize=alignment -O0 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not=" assumption " --implicit-check-not="note:" --implicit-check-not="runtime error:"
   7 // RUN: %clangxx -x c++ -fsanitize=alignment -O1 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not=" assumption " --implicit-check-not="note:" --implicit-check-not="runtime error:"
   8 // RUN: %clangxx -x c++ -fsanitize=alignment -O2 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not=" assumption " --implicit-check-not="note:" --implicit-check-not="runtime error:"
   9 // RUN: %clangxx -x c++ -fsanitize=alignment -O3 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not=" assumption " --implicit-check-not="note:" --implicit-check-not="runtime error:"
  10
  11 #include <stdlib.h>
  12
  13 char *passthrough(__attribute__((align_value(0x8000))) char *x) {
  14   return x;
  15 }
  16
  17 int main(int argc, char* argv[]) {
  18   char *ptr = (char *)malloc(2);
  19
  20   passthrough(ptr + 1);
  21   // CHECK: {{.*}}align-assume-{{.*}}.cpp:[[@LINE-7]]:10: runtime error: assumption of 32768 byte alignment for pointer of type 'char *' failed
  22   // CHECK: {{.*}}align-assume-{{.*}}.cpp:[[@LINE-9]]:34: note: alignment assumption was specified here
  23   // CHECK: 0x{{.*}}: note: address is {{.*}} aligned, misalignment offset is {{.*}} byte
  24
  25   // FIXME: shouldn't there be an assumption on the caller's side too?
  26
  27   free(ptr);
  28
  29   return 0;
  30 }