| // Copyright 2024 The Fuchsia Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "test-ubsan.h" |
| |
| namespace ubsan { |
| |
| // The test modules don't have any capabilities plumbed that could be used to |
| // log a message. The message will be formatted into the stack buffer and then |
| // a known register will point to that buffer when the process crashes. This |
| // will only make the initial header message visible, but that's something. |
| int LogError(std::string_view str) { |
| #if defined(__aarch64__) |
| register const char* x0 __asm__("x0") = str.data(); |
| __asm__ volatile("udf #0" : : "r"(x0), "m"(str.front())); |
| #elif defined(__riscv) |
| register const char* a0 __asm__("a0") = str.data(); |
| __asm__ volatile("unimp" : : "r"(a0), "m"(str.front())); |
| #elif defined(__x86_64__) |
| __asm__ volatile("ud2" : : "a"(str.data()), "m"(str.front())); |
| #endif |
| __builtin_trap(); |
| } |
| |
| } // namespace ubsan |
