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diff --git a/deps/v8/src/trap-handler/handler-inside-posix.h b/deps/v8/src/trap-handler/handler-inside-posix.h
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+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef V8_TRAP_HANDLER_HANDLER_INSIDE_POSIX_H_
+#define V8_TRAP_HANDLER_HANDLER_INSIDE_POSIX_H_
+
+#include <signal.h>
+#include "include/v8config.h"
+
+namespace v8 {
+namespace internal {
+namespace trap_handler {
+
+#if V8_OS_LINUX
+constexpr int kOobSignal = SIGSEGV;
+#elif V8_OS_MACOSX
+constexpr int kOobSignal = SIGBUS;
+#else
+#error Posix trap handlers are only supported on Linux and MacOSX.
+#endif
+
+void HandleSignal(int signum, siginfo_t* info, void* context);
+
+bool TryHandleSignal(int signum, siginfo_t* info, void* context);
+
+} // namespace trap_handler
+} // namespace internal
+} // namespace v8
+
+#endif // V8_TRAP_HANDLER_HANDLER_INSIDE_POSIX_H_