[Interpreter]: Add fake support for try/catch/finally.

test/cctest/interpreter/test-interpreter.cc

 // Copyright 2015 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.
 
 #include "src/v8.h"
 
 #include "src/execution.h"
 #include "src/handles.h"
 #include "src/interpreter/bytecode-array-builder.h"
 #include "src/interpreter/interpreter.h"
@@ skipping 47 matching lines @@
  public:
   InterpreterTester(Isolate* isolate, const char* source,
                     MaybeHandle<BytecodeArray> bytecode,
                     MaybeHandle<TypeFeedbackVector> feedback_vector)
       : isolate_(isolate),
         source_(source),
         bytecode_(bytecode),
         feedback_vector_(feedback_vector) {
     i::FLAG_vector_stores = true;
     i::FLAG_ignition = true;
+    i::FLAG_ignition_fake_try_catch = true;
     i::FLAG_always_opt = false;
     // Set ignition filter flag via SetFlagsFromString to avoid double-free
     // (or potential leak with StrDup() based on ownership confusion).
     ScopedVector<char> ignition_filter(64);
     SNPrintF(ignition_filter, "--ignition-filter=%s", kFunctionName);
     FlagList::SetFlagsFromString(ignition_filter.start(),
                                  ignition_filter.length());
     // Ensure handler table is generated.
     isolate->interpreter()->Initialize();
   }
@@ skipping 1587 matching lines @@
 
   for (size_t i = 0; i < arraysize(literals); i++) {
     std::string source(InterpreterTester::SourceForBody(literals[i].first));
     InterpreterTester tester(handles.main_isolate(), source.c_str());
     auto callable = tester.GetCallable<>();
 
     Handle<i::Object> return_value = callable().ToHandleChecked();
     CHECK(return_value->SameValue(*literals[i].second));
   }
 }
+
+
+TEST(InterpreterTryCatch) {
+  HandleAndZoneScope handles;
+
+  // TODO(rmcilroy): modify tests when we have real try catch support.
+  std::string source(InterpreterTester::SourceForBody(
+      "var a = 1; try { a = a + 1; } catch(e) { a = a + 2; }; return a;"));
+  InterpreterTester tester(handles.main_isolate(), source.c_str());
+  auto callable = tester.GetCallable<>();
+
+  Handle<Object> return_val = callable().ToHandleChecked();
+  CHECK_EQ(Smi::cast(*return_val), Smi::FromInt(2));
+}
+
+
+TEST(InterpreterTryFinally) {
+  HandleAndZoneScope handles;
+
+  // TODO(rmcilroy): modify tests when we have real try finally support.
+  std::string source(InterpreterTester::SourceForBody(
+      "var a = 1; try { a = a + 1; } finally { a = a + 2; }; return a;"));
+  InterpreterTester tester(handles.main_isolate(), source.c_str());
+  auto callable = tester.GetCallable<>();
+
+  Handle<Object> return_val = callable().ToHandleChecked();
+  CHECK_EQ(Smi::cast(*return_val), Smi::FromInt(4));
+}