Fix lazy deoptimization in the presence of exceptions

runtime/vm/simulator_arm64.cc

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include <setjmp.h>  // NOLINT
 #include <stdlib.h>
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM64)
 
@@ skipping 3586 matching lines @@
   set_register(NULL, FP, static_cast<int64_t>(fp));
   set_register(NULL, THR, reinterpret_cast<int64_t>(thread));
   // Set the tag.
   thread->set_vm_tag(VMTag::kDartTagId);
   // Clear top exit frame.
   thread->set_top_exit_frame_info(0);
 
   ASSERT(raw_exception != Object::null());
   set_register(NULL, kExceptionObjectReg, bit_cast<int64_t>(raw_exception));
   set_register(NULL, kStackTraceObjectReg, bit_cast<int64_t>(raw_stacktrace));
+  // Restore pool pointer.
+  int64_t code = *reinterpret_cast<int64_t*>(
+      fp + kPcMarkerSlotFromFp * kWordSize);
+  int64_t pp = *reinterpret_cast<int64_t*>(
+      code + Code::object_pool_offset() - kHeapObjectTag);
+  pp -= kHeapObjectTag;  // In the PP register, the pool pointer is untagged.
+  set_register(NULL, CODE_REG, code);
+  set_register(NULL, PP, pp);
   buf->Longjmp();
 }
 
 }  // namespace dart
 
 #endif  // !defined(USING_SIMULATOR)
 
 #endif  // defined TARGET_ARCH_ARM64