nullptr-and-nonzero-offset-variable.cpp
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// RUN: %clang -x c -fsanitize=pointer-overflow -O0 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="error:" --check-prefix=CHECK-UB-C
// RUN: %clang -x c -fsanitize=pointer-overflow -O1 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="error:" --check-prefix=CHECK-UB-C
// RUN: %clang -x c -fsanitize=pointer-overflow -O2 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="error:" --check-prefix=CHECK-UB-C
// RUN: %clang -x c -fsanitize=pointer-overflow -O3 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="error:" --check-prefix=CHECK-UB-C
// RUN: %clang -x c++ -fsanitize=pointer-overflow -O0 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="error:" --check-prefix=CHECK
// RUN: %clang -x c++ -fsanitize=pointer-overflow -O1 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="error:" --check-prefix=CHECK
// RUN: %clang -x c++ -fsanitize=pointer-overflow -O2 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="error:" --check-prefix=CHECK
// RUN: %clang -x c++ -fsanitize=pointer-overflow -O3 %s -o %t && %run %t 2>&1 | FileCheck %s --implicit-check-not="error:" --check-prefix=CHECK
// RUN: %clang -x c -fsanitize=pointer-overflow -O0 %s -o %t && %run %t I_AM_UB 2>&1 | FileCheck %s --implicit-check-not="error:" --check-prefix=CHECK-UB
// RUN: %clang -x c -fsanitize=pointer-overflow -O1 %s -o %t && %run %t I_AM_UB 2>&1 | FileCheck %s --implicit-check-not="error:" --check-prefix=CHECK-UB
// RUN: %clang -x c -fsanitize=pointer-overflow -O2 %s -o %t && %run %t I_AM_UB 2>&1 | FileCheck %s --implicit-check-not="error:" --check-prefix=CHECK-UB
// RUN: %clang -x c -fsanitize=pointer-overflow -O3 %s -o %t && %run %t I_AM_UB 2>&1 | FileCheck %s --implicit-check-not="error:" --check-prefix=CHECK-UB
// RUN: %clang -x c++ -fsanitize=pointer-overflow -O0 %s -o %t && %run %t I_AM_UB 2>&1 | FileCheck %s --implicit-check-not="error:" --check-prefix=CHECK-UB
// RUN: %clang -x c++ -fsanitize=pointer-overflow -O1 %s -o %t && %run %t I_AM_UB 2>&1 | FileCheck %s --implicit-check-not="error:" --check-prefix=CHECK-UB
// RUN: %clang -x c++ -fsanitize=pointer-overflow -O2 %s -o %t && %run %t I_AM_UB 2>&1 | FileCheck %s --implicit-check-not="error:" --check-prefix=CHECK-UB
// RUN: %clang -x c++ -fsanitize=pointer-overflow -O3 %s -o %t && %run %t I_AM_UB 2>&1 | FileCheck %s --implicit-check-not="error:" --check-prefix=CHECK-UB
#include <stdint.h>
#include <stdio.h>
// Just so deduplication doesn't do anything.
static char *getelementpointer_inbounds_v0(char *base, unsigned long offset) {
// Potentially UB.
return base + offset;
}
int main(int argc, char *argv[]) {
char *base;
unsigned long offset;
printf("Dummy\n");
// CHECK: Dummy
base = (char *)0;
offset = argc - 1;
(void)getelementpointer_inbounds_v0(base, offset);
// CHECK-UB: {{.*}}.cpp:[[@LINE-13]]:15: runtime error: applying non-zero offset 1 to null pointer
// CHECK-UB-C: {{.*}}.cpp:[[@LINE-14]]:15: runtime error: applying zero offset to null pointer
return 0;
}