Expose JSON stringifier through V8 API

src/api.cc

Index: src/api.cc
diff --git a/src/api.cc b/src/api.cc
index 17502bce90e8a7c512affbf8318bcb19f1e11136..b78325c317b285ace5f1b7164f2deedc63c1bc85 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -49,12 +49,12 @@
 #include "src/profiler/heap-snapshot-generator-inl.h"
 #include "src/profiler/profile-generator-inl.h"
 #include "src/profiler/sampler.h"
-#include "src/property.h"
 #include "src/property-descriptor.h"
 #include "src/property-details.h"
+#include "src/property.h"
 #include "src/prototype.h"
-#include "src/runtime/runtime.h"
 #include "src/runtime-profiler.h"
+#include "src/runtime/runtime.h"
 #include "src/simulator.h"
 #include "src/snapshot/natives.h"
 #include "src/snapshot/snapshot.h"
@@ -66,7 +66,6 @@
 #include "src/version.h"
 #include "src/vm-state-inl.h"
 
-
 namespace v8 {
 
 #define LOG_API(isolate, expr) LOG(isolate, ApiEntryCall(expr))
@@ -2749,6 +2748,19 @@ MaybeLocal<Value> JSON::Parse(Isolate* v8_isolate, Local<String> json_string) {
   RETURN_ESCAPED(result);
 }
 
+MaybeLocal<Value> JSON::Parse(Local<Context> context,
+                              Local<String> json_string) {
+  PREPARE_FOR_EXECUTION(context, "JSON::Parse", Value);
+  i::Handle<i::String> string = Utils::OpenHandle(*json_string);
+  i::Handle<i::String> source = i::String::Flatten(string);
+  auto maybe = source->IsSeqOneByteString()
+                   ? i::JsonParser<true>::Parse(source)

[haavardm, 2016/04/15 10:44:49]

Does |context| end up in source? or is a new empty context set and used in
JsonParser?

[jochen (gone - plz use gerrit), 2016/04/15 10:50:11]

the PREPARE_FOR_EXECUTION macro will create a potential exception in |context|

+                   : i::JsonParser<false>::Parse(source);
+  Local<Value> result;
+  has_pending_exception = !ToLocal<Value>(maybe, &result);
+  RETURN_ON_FAILED_EXECUTION(Value);
+  RETURN_ESCAPED(result);
+}
 
 Local<Value> JSON::Parse(Local<String> json_string) {
   auto isolate = reinterpret_cast<v8::Isolate*>(
@@ -2756,6 +2768,21 @@ Local<Value> JSON::Parse(Local<String> json_string) {
   RETURN_TO_LOCAL_UNCHECKED(Parse(isolate, json_string), Value);
 }
 
+MaybeLocal<String> JSON::Stringify(Isolate* v8_isolate,
+                                   Local<Object> json_object) {
+  auto isolate = reinterpret_cast<i::Isolate*>(v8_isolate);
+  PREPARE_FOR_EXECUTION_WITH_ISOLATE(isolate, "JSON::Stringify", String);
+  i::Handle<i::Object> object = Utils::OpenHandle(*json_object);
+  i::Handle<i::Object> maybe;
+  has_pending_exception =
+      !i::Runtime::BasicJsonStringify(isolate, object).ToHandle(&maybe);
+  RETURN_ON_FAILED_EXECUTION(String);
+  Local<String> result;
+  has_pending_exception =
+      !ToLocal<String>(i::Object::ToString(isolate, maybe), &result);
+  RETURN_ON_FAILED_EXECUTION(String);
+  RETURN_ESCAPED(result);
+}
 
 // --- D a t a ---