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
13char *passthrough(__attribute__((align_value(0x8000))) char *x) {
14 return x;
15}
16
17int main(int argc, char* argv[]) {
18 char *ptr = (char *)malloc(size: 2);
19
20 passthrough(x: 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: ptr);
28
29 return 0;
30}
31

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