Index: compiler-rt/lib/ubsan/CMakeLists.txt
===================================================================
--- compiler-rt/lib/ubsan/CMakeLists.txt
+++ compiler-rt/lib/ubsan/CMakeLists.txt
@@ -11,6 +11,7 @@
 set(UBSAN_STANDALONE_SOURCES
   ubsan_diag_standalone.cc
   ubsan_init_standalone.cc
+  ubsan_signals_standalone.cc
   )
 
 set(UBSAN_CXXABI_SOURCES
@@ -143,6 +144,7 @@
               RTSanitizerCommonLibc
               RTUbsan
               RTUbsan_standalone
+              RTInterception
       CFLAGS ${UBSAN_CFLAGS}
       PARENT_TARGET ubsan)
 
@@ -159,6 +161,7 @@
       OBJECT_LIBS RTSanitizerCommon
               RTSanitizerCommonLibc
               RTUbsan
+              RTInterception
       CFLAGS ${UBSAN_CFLAGS}
       LINK_FLAGS ${SANITIZER_COMMON_LINK_FLAGS}
       LINK_LIBS ${UBSAN_DYNAMIC_LIBS}
Index: compiler-rt/lib/ubsan/ubsan_init.h
===================================================================
--- compiler-rt/lib/ubsan/ubsan_init.h
+++ compiler-rt/lib/ubsan/ubsan_init.h
@@ -29,6 +29,9 @@
 // from "parent tool" (e.g. ASan) initialization.
 void InitAsPlugin();
 
+// Initializes signal handlers and interceptors. Only in standalone mode.
+SANITIZER_WEAK_ATTRIBUTE void InitializeDeadlySignals();
+
 }  // namespace __ubsan
 
 #endif  // UBSAN_INIT_H
Index: compiler-rt/lib/ubsan/ubsan_init.cc
===================================================================
--- compiler-rt/lib/ubsan/ubsan_init.cc
+++ compiler-rt/lib/ubsan/ubsan_init.cc
@@ -43,6 +43,8 @@
   CacheBinaryName();
   InitializeFlags();
   __sanitizer_set_report_path(common_flags()->log_path);
+  if (InitializeDeadlySignals)
+    InitializeDeadlySignals();
   AndroidLogInit();
   InitializeCoverage(common_flags()->coverage, common_flags()->coverage_dir);
   CommonInit();
Index: compiler-rt/lib/ubsan/ubsan_signals_standalone.cc
===================================================================
--- /dev/null
+++ compiler-rt/lib/ubsan/ubsan_signals_standalone.cc
@@ -0,0 +1,49 @@
+//=-- ubsan_interceptors_standalone.cc
+//------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Installs signal handlers and related interceptors for UBSan.
+//
+//===----------------------------------------------------------------------===//
+
+#include "ubsan_platform.h"
+#if CAN_SANITIZE_UB
+#include "interception/interception.h"
+#include "sanitizer_common/sanitizer_stacktrace.h"
+#include "ubsan_diag.h"
+#include "ubsan_init.h"
+
+#define COMMON_INTERCEPT_FUNCTION(name) INTERCEPT_FUNCTION(name)
+#include "sanitizer_common/sanitizer_signal_interceptors.inc"
+
+namespace __ubsan {
+
+static void OnStackUnwind(const SignalContext &sig, const void *,
+                          BufferedStackTrace *stack) {
+  GetStackTraceWithPcBpAndContext(stack, kStackTraceMax, sig.pc, sig.bp,
+                                  sig.context,
+                                  common_flags()->fast_unwind_on_fatal);
+}
+
+static void UBsanOnDeadlySignal(int signo, void *siginfo, void *context) {
+  StartReportDeadlySignal();
+  SpinMutexLock l(&CommonSanitizerReportMutex);
+  SignalContext sig(siginfo, context);
+  ReportDeadlySignal(sig, GetTid(), &OnStackUnwind, nullptr);
+  Die();
+}
+
+void InitializeDeadlySignals() {
+  InitializeSignalInterceptors();
+  InstallDeadlySignalHandlers(&UBsanOnDeadlySignal);
+}
+
+} // namespace __ubsan
+
+#endif // CAN_SANITIZE_UB
Index: compiler-rt/test/sanitizer_common/TestCases/Linux/allow_user_segv.cc
===================================================================
--- compiler-rt/test/sanitizer_common/TestCases/Linux/allow_user_segv.cc
+++ compiler-rt/test/sanitizer_common/TestCases/Linux/allow_user_segv.cc
@@ -20,7 +20,6 @@
 // Remove when fixed: https://github.com/google/sanitizers/issues/637
 // XFAIL: msan
 // XFAIL: tsan
-// XFAIL: ubsan
 
 #include <signal.h>
 #include <stdio.h>
Index: compiler-rt/test/sanitizer_common/TestCases/Posix/dedup_token_length_test.cc
===================================================================
--- compiler-rt/test/sanitizer_common/TestCases/Posix/dedup_token_length_test.cc
+++ compiler-rt/test/sanitizer_common/TestCases/Posix/dedup_token_length_test.cc
@@ -7,10 +7,9 @@
 // RUN: env %tool_options='abort_on_error=0, dedup_token_length=3' not %run %t 2>&1   | FileCheck %s --check-prefix=CHECK3 --match-full-lines
 
 // REQUIRES: stable-runtime
-// FIXME: implement SEGV handler in other sanitizers, not just asan.
+// FIXME: implement SEGV handler in other sanitizers.
 // XFAIL: msan
 // XFAIL: tsan
-// XFAIL: ubsan
 
 volatile int *null = 0;
 
Index: compiler-rt/test/sanitizer_common/TestCases/Posix/dump_instruction_bytes.cc
===================================================================
--- compiler-rt/test/sanitizer_common/TestCases/Posix/dump_instruction_bytes.cc
+++ compiler-rt/test/sanitizer_common/TestCases/Posix/dump_instruction_bytes.cc
@@ -11,7 +11,6 @@
 // FIXME: implement in other sanitizers.
 // XFAIL: msan
 // XFAIL: tsan
-// XFAIL: ubsan
 
 int main() {
 #if defined(__x86_64__)
Index: compiler-rt/test/sanitizer_common/TestCases/Posix/sanitizer_set_report_fd_test.cc
===================================================================
--- compiler-rt/test/sanitizer_common/TestCases/Posix/sanitizer_set_report_fd_test.cc
+++ compiler-rt/test/sanitizer_common/TestCases/Posix/sanitizer_set_report_fd_test.cc
@@ -8,7 +8,6 @@
 // FIXME: implement SEGV handler in other sanitizers, not just asan.
 // XFAIL: msan
 // XFAIL: tsan
-// XFAIL: ubsan
 
 #include <sanitizer/common_interface_defs.h>
 #include <stdio.h>