Find correct source position in inlined functions on debug break.

BUG=110010
TEST=test-debug/DebugBreakInline

Review URL: https://chromiumcodereview.appspot.com/9295014

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@10551 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/deoptimizer.cc

@@ -1603,6 +1603,7 @@ DeoptimizedFrameInfo::DeoptimizedFrameInfo(
   SetFunction(output_frame->GetFunction());
   expression_count_ = output_frame->GetExpressionCount();
   expression_stack_ = new Object*[expression_count_];
+  pc_ = output_frame->GetPc();
   for (int i = 0; i < expression_count_; i++) {
     SetExpression(i, output_frame->GetExpression(i));
   }

src/deoptimizer.h

@@ -749,6 +749,10 @@ class DeoptimizedFrameInfo : public Malloced {
     return expression_stack_[index];
   }
 
+  Address GetPc() {
+    return reinterpret_cast<Address>(pc_);
+  }
+
  private:
   // Set the frame function.
   void SetFunction(JSFunction* function) {
@@ -772,6 +776,7 @@ class DeoptimizedFrameInfo : public Malloced {
   int expression_count_;
   Object** parameters_;
   Object** expression_stack_;
+  intptr_t pc_;
 
   friend class Deoptimizer;
 };

src/runtime.cc

@@ -10747,6 +10747,11 @@ class FrameInspector {
         ? deoptimized_frame_->GetExpression(index)
         : frame_->GetExpression(index);
   }
+  Address GetPc() {
+    return is_optimized_
+        ? deoptimized_frame_->GetPc()
+        : frame_->pc();
+  }
 
   // To inspect all the provided arguments the frame might need to be
   // replaced with the arguments frame.
@@ -10852,17 +10857,16 @@ RUNTIME_FUNCTION(MaybeObject*, Runtime_GetFrameDetails) {
   // Get the frame id.
   Handle<Object> frame_id(WrapFrameId(it.frame()->id()), isolate);
 
-  // Find source position.
-  int position =
-      it.frame()->LookupCode()->SourcePosition(it.frame()->pc());
+  // Find source position in unoptimized code.
+  Handle<JSFunction> function(JSFunction::cast(frame_inspector.GetFunction()));
+  Handle<SharedFunctionInfo> shared(function->shared());
+  int position = shared->code()->SourcePosition(frame_inspector.GetPc());
 
   // Check for constructor frame. Inlined frames cannot be construct calls.
   bool inlined_frame = is_optimized && inlined_jsframe_index != 0;
   bool constructor = !inlined_frame && it.frame()->IsConstructor();
 
   // Get scope info and read from it for local variable information.
-  Handle<JSFunction> function(JSFunction::cast(frame_inspector.GetFunction()));
-  Handle<SharedFunctionInfo> shared(function->shared());
   Handle<ScopeInfo> scope_info(shared->scope_info());
   ASSERT(*scope_info != ScopeInfo::Empty());
 

test/cctest/test-debug.cc

@@ -7286,4 +7286,65 @@ TEST(DebugBreakLoop) {
 }
 
 
+v8::Local<v8::Script> inline_script;
+
+static void DebugBreakInlineListener(v8::DebugEvent event,
+                                     v8::Handle<v8::Object> exec_state,
+                                     v8::Handle<v8::Object> event_data,
+                                     v8::Handle<v8::Value> data) {
+  if (event != v8::Break) return;
+
+  int expected_frame_count = 4;
+  int expected_line_number[] = {1, 4, 7, 12};
+
+  i::Handle<i::Object> compiled_script = v8::Utils::OpenHandle(*inline_script);
+  i::Handle<i::Script> source_script = i::Handle<i::Script>(i::Script::cast(
+      i::JSFunction::cast(*compiled_script)->shared()->script()));
+
+  int break_id = v8::internal::Isolate::Current()->debug()->break_id();
+  char script[128];
+  i::Vector<char> script_vector(script, sizeof(script));
+  OS::SNPrintF(script_vector, "%%GetFrameCount(%d)", break_id);
+  v8::Local<v8::Value> result = CompileRun(script);
+
+  int frame_count = result->Int32Value();
+  CHECK_EQ(expected_frame_count, frame_count);
+
+  for (int i = 0; i < frame_count; i++) {
+    // The 5. element in the returned array of GetFrameDetails contains the
+    // source position of that frame.
+    OS::SNPrintF(script_vector, "%%GetFrameDetails(%d, %d)[5]", break_id, i);
+    v8::Local<v8::Value> result = CompileRun(script);
+    CHECK_EQ(expected_line_number[i],
+             i::GetScriptLineNumber(source_script, result->Int32Value()));
+  }
+  v8::Debug::SetDebugEventListener(NULL);
+  v8::V8::TerminateExecution();
+}
+
+
+TEST(DebugBreakInline) {
+  i::FLAG_allow_natives_syntax = true;
+  v8::HandleScope scope;
+  DebugLocalContext env;
+  const char* source =
+      "function debug(b) {             \n"
+      "  if (b) debugger;              \n"
+      "}                               \n"
+      "function f(b) {                 \n"
+      "  debug(b)                      \n"
+      "};                              \n"
+      "function g(b) {                 \n"
+      "  f(b);                         \n"
+      "};                              \n"
+      "g(false);                       \n"
+      "g(false);                       \n"
+      "%OptimizeFunctionOnNextCall(g); \n"
+      "g(true);";
+  v8::Debug::SetDebugEventListener(DebugBreakInlineListener);
+  inline_script = v8::Script::Compile(v8::String::New(source));
+  inline_script->Run();
+}
+
+
 #endif  // ENABLE_DEBUGGER_SUPPORT