[interpreter, debugger] support debug breaks via bytecode array copy

src/compiler/bytecode-graph-builder.cc

Index: src/compiler/bytecode-graph-builder.cc
diff --git a/src/compiler/bytecode-graph-builder.cc b/src/compiler/bytecode-graph-builder.cc
index a6c19af58fadc122923aca0f4b69bcdaa94db2c4..5254c3eba3502028b60d5af3860a619573c97649 100644
--- a/src/compiler/bytecode-graph-builder.cc
+++ b/src/compiler/bytecode-graph-builder.cc
@@ -1480,6 +1480,12 @@ void BytecodeGraphBuilder::VisitDebugger() {
   environment()->BindAccumulator(call, &states);
 }
 
+// We cannot create a graph from the debugger copy of the bytecode array.
+#define DEBUG_BREAK(Name, ...) \
+  void BytecodeGraphBuilder::Visit##Name() { CHECK(false); }

[rmcilroy, 2016/02/16 10:46:38]

/s/CHECK(false)/UNREACHABLE()/

[Yang, 2016/02/19 13:09:17]

Done.

+DEBUG_BREAK_BYTECODE_LIST(DEBUG_BREAK);
+#undef DEBUG_BREAK
+
 void BytecodeGraphBuilder::BuildForInPrepare() {
   FrameStateBeforeAndAfter states(this);
   Node* receiver = environment()->LookupAccumulator();