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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
#include "exceptions.h"
#include <string>
namespace deno {
std::string EncodeMessageAsJSON(v8::Local<v8::Context> context,
v8::Local<v8::Message> message) {
auto* isolate = context->GetIsolate();
v8::HandleScope handle_scope(isolate);
v8::Context::Scope context_scope(context);
auto stack_trace = message->GetStackTrace();
// Encode the exception into a JS object, which we will then turn into JSON.
auto json_obj = v8::Object::New(isolate);
auto exception_str = message->Get();
CHECK(json_obj->Set(context, v8_str("message"), exception_str).FromJust());
auto maybe_source_line = message->GetSourceLine(context);
if (!maybe_source_line.IsEmpty()) {
CHECK(json_obj
->Set(context, v8_str("sourceLine"),
maybe_source_line.ToLocalChecked())
.FromJust());
}
CHECK(json_obj
->Set(context, v8_str("scriptResourceName"),
message->GetScriptResourceName())
.FromJust());
auto maybe_line_number = message->GetLineNumber(context);
if (maybe_line_number.IsJust()) {
CHECK(json_obj
->Set(context, v8_str("lineNumber"),
v8::Integer::New(isolate, maybe_line_number.FromJust()))
.FromJust());
}
CHECK(json_obj
->Set(context, v8_str("startPosition"),
v8::Integer::New(isolate, message->GetStartPosition()))
.FromJust());
CHECK(json_obj
->Set(context, v8_str("endPosition"),
v8::Integer::New(isolate, message->GetEndPosition()))
.FromJust());
CHECK(json_obj
->Set(context, v8_str("errorLevel"),
v8::Integer::New(isolate, message->ErrorLevel()))
.FromJust());
auto maybe_start_column = message->GetStartColumn(context);
if (maybe_start_column.IsJust()) {
auto start_column =
v8::Integer::New(isolate, maybe_start_column.FromJust());
CHECK(
json_obj->Set(context, v8_str("startColumn"), start_column).FromJust());
}
auto maybe_end_column = message->GetEndColumn(context);
if (maybe_end_column.IsJust()) {
auto end_column = v8::Integer::New(isolate, maybe_end_column.FromJust());
CHECK(json_obj->Set(context, v8_str("endColumn"), end_column).FromJust());
}
CHECK(json_obj
->Set(context, v8_str("isSharedCrossOrigin"),
v8::Boolean::New(isolate, message->IsSharedCrossOrigin()))
.FromJust());
CHECK(json_obj
->Set(context, v8_str("isOpaque"),
v8::Boolean::New(isolate, message->IsOpaque()))
.FromJust());
v8::Local<v8::Array> frames;
if (!stack_trace.IsEmpty()) {
uint32_t count = static_cast<uint32_t>(stack_trace->GetFrameCount());
frames = v8::Array::New(isolate, count);
for (uint32_t i = 0; i < count; ++i) {
auto frame = stack_trace->GetFrame(isolate, i);
auto frame_obj = v8::Object::New(isolate);
CHECK(frames->Set(context, i, frame_obj).FromJust());
auto line = v8::Integer::New(isolate, frame->GetLineNumber());
auto column = v8::Integer::New(isolate, frame->GetColumn());
CHECK(frame_obj->Set(context, v8_str("line"), line).FromJust());
CHECK(frame_obj->Set(context, v8_str("column"), column).FromJust());
CHECK(frame_obj
->Set(context, v8_str("functionName"), frame->GetFunctionName())
.FromJust());
// scriptName can be empty in special conditions e.g. eval
auto scriptName = frame->GetScriptNameOrSourceURL();
if (scriptName.IsEmpty()) {
scriptName = v8_str("<unknown>");
}
CHECK(
frame_obj->Set(context, v8_str("scriptName"), scriptName).FromJust());
CHECK(frame_obj
->Set(context, v8_str("isEval"),
v8::Boolean::New(isolate, frame->IsEval()))
.FromJust());
CHECK(frame_obj
->Set(context, v8_str("isConstructor"),
v8::Boolean::New(isolate, frame->IsConstructor()))
.FromJust());
CHECK(frame_obj
->Set(context, v8_str("isWasm"),
v8::Boolean::New(isolate, frame->IsWasm()))
.FromJust());
}
} else {
// No stack trace. We only have one stack frame of info..
frames = v8::Array::New(isolate, 1);
auto frame_obj = v8::Object::New(isolate);
CHECK(frames->Set(context, 0, frame_obj).FromJust());
auto line =
v8::Integer::New(isolate, message->GetLineNumber(context).FromJust());
auto column =
v8::Integer::New(isolate, message->GetStartColumn(context).FromJust());
CHECK(frame_obj->Set(context, v8_str("line"), line).FromJust());
CHECK(frame_obj->Set(context, v8_str("column"), column).FromJust());
CHECK(frame_obj
->Set(context, v8_str("scriptName"),
message->GetScriptResourceName())
.FromJust());
}
CHECK(json_obj->Set(context, v8_str("frames"), frames).FromJust());
auto json_string = v8::JSON::Stringify(context, json_obj).ToLocalChecked();
v8::String::Utf8Value json_string_(isolate, json_string);
return std::string(ToCString(json_string_));
}
std::string EncodeExceptionAsJSON(v8::Local<v8::Context> context,
v8::Local<v8::Value> exception) {
auto* isolate = context->GetIsolate();
v8::HandleScope handle_scope(isolate);
v8::Context::Scope context_scope(context);
auto message = v8::Exception::CreateMessage(isolate, exception);
return EncodeMessageAsJSON(context, message);
}
void HandleException(v8::Local<v8::Context> context,
v8::Local<v8::Value> exception) {
v8::Isolate* isolate = context->GetIsolate();
DenoIsolate* d = DenoIsolate::FromIsolate(isolate);
std::string json_str = EncodeExceptionAsJSON(context, exception);
CHECK_NOT_NULL(d);
d->last_exception_ = json_str;
}
void HandleExceptionMessage(v8::Local<v8::Context> context,
v8::Local<v8::Message> message) {
v8::Isolate* isolate = context->GetIsolate();
DenoIsolate* d = DenoIsolate::FromIsolate(isolate);
std::string json_str = EncodeMessageAsJSON(context, message);
CHECK_NOT_NULL(d);
d->last_exception_ = json_str;
}
} // namespace deno
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