compiler-rt/test/ubsan/TestCases/Pointer/nullptr-and-nonzero-offset-variable.cpp

   1 // RUN: %clang -x c   -fsanitize=pointer-overflow -O0 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="runtime error:" --check-prefix=CHECK-UB-C
   2 // RUN: %clang -x c   -fsanitize=pointer-overflow -O1 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="runtime error:" --check-prefix=CHECK-UB-C
   3 // RUN: %clang -x c   -fsanitize=pointer-overflow -O2 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="runtime error:" --check-prefix=CHECK-UB-C
   4 // RUN: %clang -x c   -fsanitize=pointer-overflow -O3 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="runtime error:" --check-prefix=CHECK-UB-C
   5
   6 // RUN: %clangxx -x c++ -fsanitize=pointer-overflow -O0 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="runtime error:" --check-prefix=CHECK
   7 // RUN: %clangxx -x c++ -fsanitize=pointer-overflow -O1 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="runtime error:" --check-prefix=CHECK
   8 // RUN: %clangxx -x c++ -fsanitize=pointer-overflow -O2 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="runtime error:" --check-prefix=CHECK
   9 // RUN: %clangxx -x c++ -fsanitize=pointer-overflow -O3 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="runtime error:" --check-prefix=CHECK
  10
  11 // RUN: %clang -x c   -fsanitize=pointer-overflow -O0 %s -o %t && %run %t I_AM_UB 2>&1 | FileCheck %s --implicit-check-not="runtime error:" --check-prefix=CHECK-UB
  12 // RUN: %clang -x c   -fsanitize=pointer-overflow -O1 %s -o %t && %run %t I_AM_UB 2>&1 | FileCheck %s --implicit-check-not="runtime error:" --check-prefix=CHECK-UB
  13 // RUN: %clang -x c   -fsanitize=pointer-overflow -O2 %s -o %t && %run %t I_AM_UB 2>&1 | FileCheck %s --implicit-check-not="runtime error:" --check-prefix=CHECK-UB
  14 // RUN: %clang -x c   -fsanitize=pointer-overflow -O3 %s -o %t && %run %t I_AM_UB 2>&1 | FileCheck %s --implicit-check-not="runtime error:" --check-prefix=CHECK-UB
  15
  16 // RUN: %clangxx -x c++ -fsanitize=pointer-overflow -O0 %s -o %t && %run %t I_AM_UB 2>&1 | FileCheck %s --implicit-check-not="runtime error:" --check-prefix=CHECK-UB
  17 // RUN: %clangxx -x c++ -fsanitize=pointer-overflow -O1 %s -o %t && %run %t I_AM_UB 2>&1 | FileCheck %s --implicit-check-not="runtime error:" --check-prefix=CHECK-UB
  18 // RUN: %clangxx -x c++ -fsanitize=pointer-overflow -O2 %s -o %t && %run %t I_AM_UB 2>&1 | FileCheck %s --implicit-check-not="runtime error:" --check-prefix=CHECK-UB
  19 // RUN: %clangxx -x c++ -fsanitize=pointer-overflow -O3 %s -o %t && %run %t I_AM_UB 2>&1 | FileCheck %s --implicit-check-not="runtime error:" --check-prefix=CHECK-UB
  20
  21 #include <stdint.h>
  22 #include <stdio.h>
  23
  24 // Just so deduplication doesn't do anything.
  25 static char *getelementpointer_inbounds_v0(char *base, unsigned long offset) {
  26   // Potentially UB.
  27   return base + offset;
  28 }
  29
  30 int main(int argc, char *argv[]) {
  31   char *base;
  32   unsigned long offset;
  33
  34   printf("Dummy\n");
  35   // CHECK: Dummy
  36
  37   base = (char *)0;
  38   offset = argc - 1;
  39   (void)getelementpointer_inbounds_v0(base, offset);
  40   // CHECK-UB: {{.*}}.cpp:[[@LINE-13]]:15: runtime error: applying non-zero offset 1 to null pointer
  41   // CHECK-UB-C: {{.*}}.cpp:[[@LINE-14]]:15: runtime error: applying zero offset to null pointer
  42
  43   return 0;
  44 }