Fix lazy deoptimization in the presence of exceptions

runtime/vm/code_generator.cc

 // Copyright (c) 2013, 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 "vm/code_generator.h"
 
 #include "vm/assembler.h"
 #include "vm/ast.h"
 #include "vm/code_patcher.h"
 #include "vm/compiler.h"
@@ skipping 1931 matching lines @@
   // is not a performance issue).
   uword lazy_deopt_jump = optimized_code.GetLazyDeoptPc();
 #if !defined(TARGET_ARCH_DBC)
   ASSERT(lazy_deopt_jump != 0);
 #endif
   const Instructions& instrs =
       Instructions::Handle(zone, optimized_code.instructions());
   {
     WritableInstructionsScope writable(instrs.PayloadStart(), instrs.size());
     CodePatcher::InsertDeoptimizationCallAt(pc, lazy_deopt_jump);
-  }
-  if (FLAG_trace_patching) {
-    const String& name = String::Handle(function.name());
-    OS::PrintErr("InsertDeoptimizationCallAt: %" Px " to %" Px " for %s\n", pc,
-                 lazy_deopt_jump, name.ToCString());
+    if (FLAG_trace_patching) {
+      const String& name = String::Handle(function.name());
+      OS::PrintErr(
+          "InsertDeoptimizationCallAt: 0x%" Px " to 0x%" Px " for %s\n",
+          pc, lazy_deopt_jump, name.ToCString());
+    }
+    const ExceptionHandlers& handlers =
+        ExceptionHandlers::Handle(zone, optimized_code.exception_handlers());
+    RawExceptionHandlers::HandlerInfo info;
+    for (intptr_t i = 0; i < handlers.num_entries(); ++i) {
+      handlers.GetHandlerInfo(i, &info);
+      const uword patch_pc = instrs.PayloadStart() + info.handler_pc_offset;
+      CodePatcher::InsertDeoptimizationCallAt(patch_pc, lazy_deopt_jump);
+      if (FLAG_trace_patching) {
+        OS::PrintErr("  at handler 0x%" Px "\n", patch_pc);
+      }
+    }
   }
   // Mark code as dead (do not GC its embedded objects).
   optimized_code.set_is_alive(false);
 }
 
 
 // Currently checks only that all optimized frames have kDeoptIndex
 // and unoptimized code has the kDeoptAfter.
 void DeoptimizeFunctionsOnStack() {
   DartFrameIterator iterator;
@@ skipping 249 matching lines @@
   const intptr_t elm_size = old_data.ElementSizeInBytes();
   const TypedData& new_data =
       TypedData::Handle(TypedData::New(cid, new_size, Heap::kOld));
   TypedData::Copy(new_data, 0, old_data, 0, old_size * elm_size);
   typed_data_cell.SetAt(0, new_data);
   arguments.SetReturn(new_data);
 }
 
 
 }  // namespace dart