| // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| #include "vm/report.h" |
| |
| #include "vm/code_patcher.h" |
| #include "vm/exceptions.h" |
| #include "vm/flags.h" |
| #include "vm/longjump.h" |
| #include "vm/object.h" |
| #include "vm/stack_frame.h" |
| #include "vm/symbols.h" |
| |
| namespace dart { |
| |
| DEFINE_FLAG(bool, silent_warnings, false, "Silence warnings."); |
| DEFINE_FLAG(bool, warning_as_error, false, "Treat warnings as errors."); |
| |
| StringPtr Report::PrependSnippet(Kind kind, |
| const Script& script, |
| TokenPosition token_pos, |
| bool report_after_token, |
| const String& message) { |
| const char* message_header; |
| switch (kind) { |
| case kWarning: |
| message_header = "warning"; |
| break; |
| case kError: |
| message_header = "error"; |
| break; |
| case kBailout: |
| message_header = "bailout"; |
| break; |
| default: |
| message_header = ""; |
| UNREACHABLE(); |
| } |
| String& result = String::Handle(); |
| if (!script.IsNull() && script.HasSource()) { |
| const String& script_url = String::Handle(script.url()); |
| intptr_t line, column; |
| if (script.GetTokenLocation(token_pos, &line, &column)) { |
| const intptr_t token_len = script.GetTokenLength(token_pos); |
| if (report_after_token) { |
| column += token_len < 0 ? 1 : token_len; |
| } |
| // Allocate formatted strings in old space as they may be created during |
| // optimizing compilation. Those strings are created rarely and should not |
| // pollute old space. |
| result = String::NewFormatted( |
| Heap::kOld, "'%s': %s: line %" Pd " pos %" Pd ": ", |
| script_url.ToCString(), message_header, line, column); |
| // Append the formatted error or warning message. |
| const Array& strs = Array::Handle(Array::New(6, Heap::kOld)); |
| strs.SetAt(0, result); |
| strs.SetAt(1, message); |
| // Append the source line. |
| const String& script_line = |
| String::Handle(script.GetLine(line, Heap::kOld)); |
| ASSERT(!script_line.IsNull()); |
| strs.SetAt(2, Symbols::NewLine()); |
| strs.SetAt(3, script_line); |
| strs.SetAt(4, Symbols::NewLine()); |
| // Append the column marker. |
| const String& column_line = String::Handle(String::NewFormatted( |
| Heap::kOld, "%*s\n", static_cast<int>(column), "^")); |
| strs.SetAt(5, column_line); |
| result = String::ConcatAll(strs, Heap::kOld); |
| } else { |
| // Token position is unknown. |
| result = String::NewFormatted( |
| Heap::kOld, "'%s': %s: ", script_url.ToCString(), message_header); |
| result = String::Concat(result, message, Heap::kOld); |
| } |
| } else { |
| // Script is unknown. |
| // Append the formatted error or warning message. |
| result = String::NewFormatted(Heap::kOld, "%s: ", message_header); |
| result = String::Concat(result, message, Heap::kOld); |
| } |
| return result.ptr(); |
| } |
| |
| void Report::LongJump(const Error& error) { |
| Thread::Current()->long_jump_base()->Jump(1, error); |
| UNREACHABLE(); |
| } |
| |
| void Report::LongJumpF(const Error& prev_error, |
| const Script& script, |
| TokenPosition token_pos, |
| const char* format, |
| ...) { |
| va_list args; |
| va_start(args, format); |
| LongJumpV(prev_error, script, token_pos, format, args); |
| va_end(args); |
| UNREACHABLE(); |
| } |
| |
| void Report::LongJumpV(const Error& prev_error, |
| const Script& script, |
| TokenPosition token_pos, |
| const char* format, |
| va_list args) { |
| // If an isolate is being killed a [UnwindError] will be propagated up the |
| // stack. In such a case we cannot wrap the unwind error in a new |
| // [LanguageError]. Instead we simply continue propagating the [UnwindError] |
| // upwards. |
| if (prev_error.IsUnwindError()) { |
| LongJump(prev_error); |
| UNREACHABLE(); |
| } |
| const Error& error = Error::Handle(LanguageError::NewFormattedV( |
| prev_error, script, token_pos, Report::AtLocation, kError, Heap::kOld, |
| format, args)); |
| LongJump(error); |
| UNREACHABLE(); |
| } |
| |
| void Report::MessageF(Kind kind, |
| const Script& script, |
| TokenPosition token_pos, |
| bool report_after_token, |
| const char* format, |
| ...) { |
| va_list args; |
| va_start(args, format); |
| MessageV(kind, script, token_pos, report_after_token, format, args); |
| va_end(args); |
| } |
| |
| void Report::MessageV(Kind kind, |
| const Script& script, |
| TokenPosition token_pos, |
| bool report_after_token, |
| const char* format, |
| va_list args) { |
| if (kind < kError) { |
| // Reporting a warning. |
| if (FLAG_silent_warnings) { |
| return; |
| } |
| if (!FLAG_warning_as_error) { |
| const String& msg = String::Handle(String::NewFormattedV(format, args)); |
| const String& snippet_msg = String::Handle( |
| PrependSnippet(kind, script, token_pos, report_after_token, msg)); |
| OS::PrintErr("%s", snippet_msg.ToCString()); |
| return; |
| } |
| } |
| // Reporting an error (or a warning as error). |
| const Error& error = Error::Handle(LanguageError::NewFormattedV( |
| Error::Handle(), // No previous error. |
| script, token_pos, report_after_token, kind, Heap::kOld, format, args)); |
| LongJump(error); |
| UNREACHABLE(); |
| } |
| |
| } // namespace dart |