[libcxx-commits] [libcxx] [libc++][hardening] Introduce a dylib function to log hardening errors. (PR #148266)

[Nikolas Klauser via libcxx-commits]

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@@ -0,0 +1,61 @@
+//===----------------------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include <__config>
+#include <__log_error>
+#include <cstdio>
+
+#ifdef __BIONIC__
+#  include <syslog.h>
+extern "C" void android_set_abort_message(const char* msg);
+#endif // __BIONIC__
+
+#if defined(__APPLE__) && __has_include(<os/reason_private.h>)
+#  include <os/reason_private.h>
+#endif
+
+_LIBCPP_BEGIN_NAMESPACE_STD
+
+namespace {
+
+void log_security_failure(const char* message) noexcept {
+  // Always log the message to `stderr` in case the platform-specific system calls fail.
+  fprintf(stderr, "%s", message);
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philnik777 wrote:

Maybe use `fputs` instead?

https://github.com/llvm/llvm-project/pull/148266