37 lines · 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 13typedef char *__attribute__((align_value(0x8000))) aligned_char;14 15struct ac_struct {16 aligned_char a;17};18 19char *load_from_ac_struct(struct ac_struct *x) {20 return x->a;21}22 23int main(int argc, char* argv[]) {24 char *ptr = (char *)malloc(2);25 26 struct ac_struct x;27 x.a = ptr + 1; // FIXME: it is weird that this does not also have an assumption.28 load_from_ac_struct(&x);29 // CHECK: {{.*}}align-assume-{{.*}}.cpp:[[@LINE-9]]:13: runtime error: assumption of 32768 byte alignment for pointer of type 'aligned_char' (aka 'char *') failed30 // CHECK: {{.*}}align-assume-{{.*}}.cpp:[[@LINE-17]]:30: note: alignment assumption was specified here31 // CHECK: 0x{{.*}}: note: address is {{.*}} aligned, misalignment offset is {{.*}} byte32 33 free(ptr);34 35 return 0;36}37