mirror of
https://github.com/denoland/deno.git
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236 lines
8.4 KiB
C++
236 lines
8.4 KiB
C++
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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#include "exceptions.h"
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#include <string>
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#include "internal.h"
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namespace deno {
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v8::Local<v8::Object> EncodeMessageAsObject(v8::Local<v8::Context> context,
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v8::Local<v8::Message> message) {
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auto* isolate = context->GetIsolate();
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v8::EscapableHandleScope handle_scope(isolate);
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v8::Context::Scope context_scope(context);
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auto stack_trace = message->GetStackTrace();
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// Encode the exception into a JS object, which we will then turn into JSON.
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auto json_obj = v8::Object::New(isolate);
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auto exception_str = message->Get();
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CHECK(json_obj->Set(context, v8_str("message"), exception_str).FromJust());
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auto maybe_source_line = message->GetSourceLine(context);
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if (!maybe_source_line.IsEmpty()) {
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CHECK(json_obj
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->Set(context, v8_str("sourceLine"),
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maybe_source_line.ToLocalChecked())
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.FromJust());
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}
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CHECK(json_obj
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->Set(context, v8_str("scriptResourceName"),
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message->GetScriptResourceName())
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.FromJust());
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auto maybe_line_number = message->GetLineNumber(context);
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if (maybe_line_number.IsJust()) {
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CHECK(json_obj
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->Set(context, v8_str("lineNumber"),
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v8::Integer::New(isolate, maybe_line_number.FromJust()))
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.FromJust());
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}
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CHECK(json_obj
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->Set(context, v8_str("startPosition"),
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v8::Integer::New(isolate, message->GetStartPosition()))
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.FromJust());
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CHECK(json_obj
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->Set(context, v8_str("endPosition"),
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v8::Integer::New(isolate, message->GetEndPosition()))
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.FromJust());
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CHECK(json_obj
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->Set(context, v8_str("errorLevel"),
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v8::Integer::New(isolate, message->ErrorLevel()))
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.FromJust());
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auto maybe_start_column = message->GetStartColumn(context);
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if (maybe_start_column.IsJust()) {
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auto start_column =
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v8::Integer::New(isolate, maybe_start_column.FromJust());
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CHECK(
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json_obj->Set(context, v8_str("startColumn"), start_column).FromJust());
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}
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auto maybe_end_column = message->GetEndColumn(context);
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if (maybe_end_column.IsJust()) {
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auto end_column = v8::Integer::New(isolate, maybe_end_column.FromJust());
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CHECK(json_obj->Set(context, v8_str("endColumn"), end_column).FromJust());
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}
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CHECK(json_obj
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->Set(context, v8_str("isSharedCrossOrigin"),
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v8::Boolean::New(isolate, message->IsSharedCrossOrigin()))
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.FromJust());
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CHECK(json_obj
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->Set(context, v8_str("isOpaque"),
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v8::Boolean::New(isolate, message->IsOpaque()))
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.FromJust());
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v8::Local<v8::Array> frames;
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if (!stack_trace.IsEmpty()) {
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uint32_t count = static_cast<uint32_t>(stack_trace->GetFrameCount());
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frames = v8::Array::New(isolate, count);
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for (uint32_t i = 0; i < count; ++i) {
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auto frame = stack_trace->GetFrame(isolate, i);
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auto frame_obj = v8::Object::New(isolate);
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CHECK(frames->Set(context, i, frame_obj).FromJust());
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auto line = v8::Integer::New(isolate, frame->GetLineNumber());
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auto column = v8::Integer::New(isolate, frame->GetColumn());
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CHECK(frame_obj->Set(context, v8_str("line"), line).FromJust());
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CHECK(frame_obj->Set(context, v8_str("column"), column).FromJust());
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auto function_name = frame->GetFunctionName();
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if (!function_name.IsEmpty()) {
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CHECK(frame_obj->Set(context, v8_str("functionName"), function_name)
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.FromJust());
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}
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// scriptName can be empty in special conditions e.g. eval
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auto scriptName = frame->GetScriptNameOrSourceURL();
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if (scriptName.IsEmpty()) {
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scriptName = v8_str("<unknown>");
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}
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CHECK(
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frame_obj->Set(context, v8_str("scriptName"), scriptName).FromJust());
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CHECK(frame_obj
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->Set(context, v8_str("isEval"),
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v8::Boolean::New(isolate, frame->IsEval()))
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.FromJust());
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CHECK(frame_obj
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->Set(context, v8_str("isConstructor"),
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v8::Boolean::New(isolate, frame->IsConstructor()))
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.FromJust());
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CHECK(frame_obj
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->Set(context, v8_str("isWasm"),
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v8::Boolean::New(isolate, frame->IsWasm()))
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.FromJust());
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}
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} else {
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// No stack trace. We only have one stack frame of info..
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frames = v8::Array::New(isolate, 1);
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auto frame_obj = v8::Object::New(isolate);
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CHECK(frames->Set(context, 0, frame_obj).FromJust());
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auto line =
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v8::Integer::New(isolate, message->GetLineNumber(context).FromJust());
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auto column =
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v8::Integer::New(isolate, message->GetStartColumn(context).FromJust());
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CHECK(frame_obj->Set(context, v8_str("line"), line).FromJust());
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CHECK(frame_obj->Set(context, v8_str("column"), column).FromJust());
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CHECK(frame_obj
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->Set(context, v8_str("scriptName"),
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message->GetScriptResourceName())
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.FromJust());
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}
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CHECK(json_obj->Set(context, v8_str("frames"), frames).FromJust());
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json_obj = handle_scope.Escape(json_obj);
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return json_obj;
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}
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std::string EncodeMessageAsJSON(v8::Local<v8::Context> context,
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v8::Local<v8::Message> message) {
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auto* isolate = context->GetIsolate();
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v8::HandleScope handle_scope(isolate);
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v8::Context::Scope context_scope(context);
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auto json_obj = EncodeMessageAsObject(context, message);
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auto json_string = v8::JSON::Stringify(context, json_obj).ToLocalChecked();
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v8::String::Utf8Value json_string_(isolate, json_string);
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return std::string(ToCString(json_string_));
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}
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v8::Local<v8::Object> EncodeExceptionAsObject(v8::Local<v8::Context> context,
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v8::Local<v8::Value> exception) {
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auto* isolate = context->GetIsolate();
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v8::EscapableHandleScope handle_scope(isolate);
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v8::Context::Scope context_scope(context);
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auto message = v8::Exception::CreateMessage(isolate, exception);
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auto json_obj = EncodeMessageAsObject(context, message);
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json_obj = handle_scope.Escape(json_obj);
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return json_obj;
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}
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std::string EncodeExceptionAsJSON(v8::Local<v8::Context> context,
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v8::Local<v8::Value> exception) {
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auto* isolate = context->GetIsolate();
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v8::HandleScope handle_scope(isolate);
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v8::Context::Scope context_scope(context);
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auto message = v8::Exception::CreateMessage(isolate, exception);
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return EncodeMessageAsJSON(context, message);
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}
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void HandleException(v8::Local<v8::Context> context,
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v8::Local<v8::Value> exception) {
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v8::Isolate* isolate = context->GetIsolate();
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// TerminateExecution was called
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if (isolate->IsExecutionTerminating()) {
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// cancel exception termination so that the exception can be created
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isolate->CancelTerminateExecution();
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// maybe make a new exception object
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if (exception->IsNullOrUndefined()) {
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exception = v8::Exception::Error(v8_str("execution terminated"));
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}
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// handle the exception as if it is a regular exception
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HandleException(context, exception);
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// re-enable exception termination
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isolate->TerminateExecution();
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return;
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}
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DenoIsolate* d = DenoIsolate::FromIsolate(isolate);
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std::string json_str = EncodeExceptionAsJSON(context, exception);
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CHECK_NOT_NULL(d);
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d->last_exception_ = json_str;
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d->last_exception_handle_.Reset(isolate, exception);
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}
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void HandleExceptionMessage(v8::Local<v8::Context> context,
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v8::Local<v8::Message> message) {
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v8::Isolate* isolate = context->GetIsolate();
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// TerminateExecution was called
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if (isolate->IsExecutionTerminating()) {
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HandleException(context, v8::Undefined(isolate));
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return;
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}
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DenoIsolate* d = DenoIsolate::FromIsolate(isolate);
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std::string json_str = EncodeMessageAsJSON(context, message);
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CHECK_NOT_NULL(d);
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d->last_exception_ = json_str;
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}
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void ClearException(v8::Local<v8::Context> context) {
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v8::Isolate* isolate = context->GetIsolate();
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DenoIsolate* d = DenoIsolate::FromIsolate(isolate);
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CHECK_NOT_NULL(d);
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d->last_exception_.clear();
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d->last_exception_handle_.Reset();
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}
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void ThrowInvalidArgument(v8::Isolate* isolate) {
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isolate->ThrowException(v8::Exception::TypeError(v8_str("Invalid Argument")));
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}
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} // namespace deno
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