| // 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 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; |
| } |
| static char *getelementpointer_inbounds_v1(char *base, unsigned long offset) { |
| // Potentially UB. |
| return base + offset; |
| } |
| |
| int main(int argc, char *argv[]) { |
| char *base; |
| unsigned long offset; |
| |
| base = (char *)0; |
| offset = argc - 1; |
| (void)getelementpointer_inbounds_v0(base, offset); |
| // CHECK-UB: {{.*}}.c:[[@LINE-14]]:15: runtime error: applying non-zero offset 1 to null pointer |
| // CHECK-UB-C: {{.*}}.c:[[@LINE-15]]:15: runtime error: applying zero offset to null pointer |
| |
| base = (char *)(intptr_t)(argc - 1); |
| offset = argc == 1 ? 0 : -(argc - 1); |
| (void)getelementpointer_inbounds_v1(base, offset); |
| // CHECK-UB: {{.*}}.c:[[@LINE-16]]:15: runtime error: applying non-zero offset to non-null pointer {{.*}} produced null pointer |
| // CHECK-UB-C: {{.*}}.c:[[@LINE-17]]:15: runtime error: applying zero offset to null pointer |
| |
| return 0; |
| } |