| // Copyright 2016 Google Inc. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "cobalt/script/mozjs/util/exception_helpers.h" |
| |
| #include <algorithm> |
| |
| #include "cobalt/script/mozjs/conversion_helpers.h" |
| #include "cobalt/script/mozjs/mozjs_exception_state.h" |
| #include "third_party/mozjs/js/public/RootingAPI.h" |
| #include "third_party/mozjs/js/src/jsapi.h" |
| #include "third_party/mozjs/js/src/jsdbgapi.h" |
| #include "third_party/mozjs/js/src/jsscript.h" |
| |
| namespace cobalt { |
| namespace script { |
| namespace mozjs { |
| namespace util { |
| |
| std::string GetExceptionString(JSContext* context) { |
| if (!JS_IsExceptionPending(context)) { |
| return std::string("No exception pending."); |
| } |
| JS::RootedValue exception(context); |
| JS_GetPendingException(context, exception.address()); |
| JS_ReportPendingException(context); |
| return GetExceptionString(context, exception); |
| } |
| |
| std::string GetExceptionString(JSContext* context, |
| JS::HandleValue exception) { |
| std::string exception_string; |
| MozjsExceptionState exception_state(context); |
| FromJSValue(context, exception, kNoConversionFlags, &exception_state, |
| &exception_string); |
| return exception_string; |
| } |
| |
| void GetStackTrace(JSContext* context, size_t max_frames, |
| nb::RewindableVector<StackFrame>* output) { |
| DCHECK(output); |
| output->rewindAll(); |
| JSAutoRequest auto_request(context); |
| JS::StackDescription* stack_description = |
| JS::DescribeStack(context, max_frames); |
| if (max_frames == 0) { |
| max_frames = static_cast<size_t>(stack_description->nframes); |
| } else { |
| max_frames = |
| std::min(max_frames, static_cast<size_t>(stack_description->nframes)); |
| } |
| JS::FrameDescription* stack_trace = stack_description->frames; |
| for (size_t i = 0; i < max_frames; ++i) { |
| output->grow(1); |
| StackFrame& sf = output->back(); |
| |
| sf.line_number = stack_trace[i].lineno; |
| sf.column_number = stack_trace[i].columnno; |
| sf.function_name = "global code"; |
| if (stack_trace[i].fun) { |
| JS::RootedString rooted_string(context, |
| JS_GetFunctionId(stack_trace[i].fun)); |
| if (rooted_string) { |
| const jschar* jstring_raw = rooted_string->getChars(context); |
| |
| if (!jstring_raw) { |
| sf.function_name = ""; |
| } else { |
| // Note, this is a wide-string conversion. |
| sf.function_name.assign(jstring_raw, |
| jstring_raw + rooted_string->length()); |
| } |
| } else { |
| // anonymous function |
| sf.function_name = "(anonymous function)"; |
| } |
| } |
| if (stack_trace[i].script) { |
| sf.source_url = stack_trace[i].script->filename(); |
| } |
| } |
| JS::FreeStackDescription(context, stack_description); |
| } |
| |
| } // namespace util |
| } // namespace mozjs |
| } // namespace script |
| } // namespace cobalt |