Bug 1271650 - Implement a C++ interface for DebuggerFrame.getEnvironment;r=fitzgen

js/src/vm/Debugger.cpp

@@ -7067,26 +7067,6 @@ DebuggerFrame::getIsConstructing(JSContext* cx, Handle<DebuggerFrame*> frame, bo
     return true;
 }
 
-/* static */ bool
-DebuggerFrame::getScriptFrameIter(JSContext* cx, Handle<DebuggerFrame*> frame,
-                                  Maybe<ScriptFrameIter>& result)
-{
-    AbstractFramePtr referent = AbstractFramePtr::FromRaw(frame->getPrivate());
-    if (referent.isScriptFrameIterData()) {
-        result.emplace(*reinterpret_cast<ScriptFrameIter::Data*>(referent.raw()));
-    } else {
-        result.emplace(cx, ScriptFrameIter::IGNORE_DEBUGGER_EVAL_PREV_LINK);
-        ScriptFrameIter& iter = *result;
-        while (!iter.hasUsableAbstractFramePtr() || iter.abstractFramePtr() != referent)
-            ++iter;
-        AbstractFramePtr data = iter.copyDataAsAbstractFramePtr();
-        if (!data)
-            return false;
-        frame->setPrivate(data.raw());
-    }
-    return true;
-}
-
 static void
 UpdateFrameIterPc(FrameIter& iter)
 {
@@ -7124,6 +7104,49 @@ UpdateFrameIterPc(FrameIter& iter)
     iter.updatePcQuadratic();
 }
 
+/* static */ bool
+DebuggerFrame::getEnvironment(JSContext* cx, Handle<DebuggerFrame*> frame,
+                              MutableHandle<DebuggerEnvironment*> result)
+{
+    Debugger* dbg = frame->owner();
+
+    Maybe<ScriptFrameIter> maybeIter;
+    if (!DebuggerFrame::getScriptFrameIter(cx, frame, maybeIter))
+        return false;
+    ScriptFrameIter& iter = *maybeIter;
+
+    Rooted<Env*> env(cx);
+    {
+        AutoCompartment ac(cx, iter.abstractFramePtr().scopeChain());
+        UpdateFrameIterPc(iter);
+        env = GetDebugScopeForFrame(cx, iter.abstractFramePtr(), iter.pc());
+        if (!env)
+            return false;
+    }
+
+    return dbg->wrapEnvironment(cx, env, result);
+}
+
+/* static */ bool
+DebuggerFrame::getScriptFrameIter(JSContext* cx, Handle<DebuggerFrame*> frame,
+                                  Maybe<ScriptFrameIter>& result)
+{
+    AbstractFramePtr referent = AbstractFramePtr::FromRaw(frame->getPrivate());
+    if (referent.isScriptFrameIterData()) {
+        result.emplace(*reinterpret_cast<ScriptFrameIter::Data*>(referent.raw()));
+    } else {
+        result.emplace(cx, ScriptFrameIter::IGNORE_DEBUGGER_EVAL_PREV_LINK);
+        ScriptFrameIter& iter = *result;
+        while (!iter.hasUsableAbstractFramePtr() || iter.abstractFramePtr() != referent)
+            ++iter;
+        AbstractFramePtr data = iter.copyDataAsAbstractFramePtr();
+        if (!data)
+            return false;
+        frame->setPrivate(data.raw());
+    }
+    return true;
+}
+
 static void
 DebuggerFrame_freeScriptFrameIterData(FreeOp* fop, JSObject* obj)
 {
@@ -7293,21 +7316,17 @@ DebuggerFrame_getImplementation(JSContext* cx, unsigned argc, Value* vp)
     return true;
 }
 
-static bool
-DebuggerFrame_getEnvironment(JSContext* cx, unsigned argc, Value* vp)
+/* static */ bool
+DebuggerFrame::environmentGetter(JSContext* cx, unsigned argc, Value* vp)
 {
-    THIS_FRAME_OWNER_ITER(cx, argc, vp, "get environment", args, thisobj, _, iter, dbg);
+    THIS_DEBUGGER_FRAME(cx, argc, vp, "get environment", args, frame);
 
-    Rooted<Env*> env(cx);
-    {
-        AutoCompartment ac(cx, iter.abstractFramePtr().scopeChain());
-        UpdateFrameIterPc(iter);
-        env = GetDebugScopeForFrame(cx, iter.abstractFramePtr(), iter.pc());
-        if (!env)
-            return false;
-    }
+    Rooted<DebuggerEnvironment*> result(cx);
+    if (!DebuggerFrame::getEnvironment(cx, frame, &result))
+        return false;
 
-    return dbg->wrapEnvironment(cx, env, args.rval());
+    args.rval().setObject(*result);
+    return true;
 }
 
 /* static */ bool
@@ -7856,7 +7875,7 @@ const JSPropertySpec DebuggerFrame::properties_[] = {
     JS_PSG("arguments", DebuggerFrame_getArguments, 0),
     JS_PSG("callee", DebuggerFrame::calleeGetter, 0),
     JS_PSG("constructing", DebuggerFrame::constructingGetter, 0),
-    JS_PSG("environment", DebuggerFrame_getEnvironment, 0),
+    JS_PSG("environment", DebuggerFrame::environmentGetter, 0),
     JS_PSG("generator", DebuggerFrame_getGenerator, 0),
     JS_PSG("live", DebuggerFrame_getLive, 0),
     JS_PSG("offset", DebuggerFrame_getOffset, 0),

js/src/vm/Debugger.h

@@ -1151,6 +1151,8 @@ class DebuggerFrame : public NativeObject
                                        MutableHandle<DebuggerObject*> result);
     static MOZ_MUST_USE bool getIsConstructing(JSContext* cx, Handle<DebuggerFrame*> frame,
                                                bool& result);
+    static MOZ_MUST_USE bool getEnvironment(JSContext* cx, Handle<DebuggerFrame*> frame,
+                                            MutableHandle<DebuggerEnvironment*> result);
 
   private:
     static const ClassOps classOps_;
@@ -1165,6 +1167,7 @@ class DebuggerFrame : public NativeObject
 
     static MOZ_MUST_USE bool calleeGetter(JSContext* cx, unsigned argc, Value* vp);
     static MOZ_MUST_USE bool constructingGetter(JSContext* cx, unsigned argc, Value* vp);
+    static MOZ_MUST_USE bool environmentGetter(JSContext* cx, unsigned argc, Value* vp);
 
     AbstractFramePtr referent() const;
     Debugger* owner() const;