| 1 | // Copyright (C) 2018 The Qt Company Ltd. |
|---|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
| 3 | |
| 4 | #include "qv4stackframe_p.h" |
| 5 | #include <private/qv4qobjectwrapper_p.h> |
| 6 | #include <QtCore/qstring.h> |
| 7 | |
| 8 | using namespace QV4; |
| 9 | |
| 10 | QString CppStackFrame::source() const |
| 11 | { |
| 12 | return v4Function ? v4Function->sourceFile() : QString(); |
| 13 | } |
| 14 | |
| 15 | QString CppStackFrame::function() const |
| 16 | { |
| 17 | return v4Function ? v4Function->name()->toQString() : QString(); |
| 18 | } |
| 19 | |
| 20 | static const CompiledData::CodeOffsetToLineAndStatement *lineAndStatement(const CppStackFrame *frame) |
| 21 | { |
| 22 | if (!frame->v4Function || frame->instructionPointer <= 0) |
| 23 | return nullptr; |
| 24 | |
| 25 | auto findLine = [](const CompiledData::CodeOffsetToLineAndStatement &entry, uint offset) { |
| 26 | return entry.codeOffset < offset; |
| 27 | }; |
| 28 | |
| 29 | const QV4::CompiledData::Function *cf = frame->v4Function->compiledFunction; |
| 30 | const uint offset = frame->instructionPointer; |
| 31 | const CompiledData::CodeOffsetToLineAndStatement *lineAndStatementNumbers |
| 32 | = cf->lineAndStatementNumberTable(); |
| 33 | const uint nLineAndStatementNumbers = cf->nLineAndStatementNumbers; |
| 34 | return std::lower_bound( |
| 35 | first: lineAndStatementNumbers, last: lineAndStatementNumbers + nLineAndStatementNumbers, |
| 36 | val: offset, comp: findLine) - 1; |
| 37 | } |
| 38 | |
| 39 | int CppStackFrame::lineNumber() const |
| 40 | { |
| 41 | if (auto *line = lineAndStatement(frame: this)) |
| 42 | return line->line; |
| 43 | return missingLineNumber(); |
| 44 | } |
| 45 | |
| 46 | int CppStackFrame::statementNumber() const |
| 47 | { |
| 48 | if (auto *statement = lineAndStatement(frame: this)) |
| 49 | return statement->statement; |
| 50 | return -1; |
| 51 | } |
| 52 | |
| 53 | int CppStackFrame::missingLineNumber() const |
| 54 | { |
| 55 | // Remove the first bit so that we can cast to positive int and negate. |
| 56 | // Remove the last bit so that it can't be -1. |
| 57 | const int result = -int(quintptr(this) & 0x7ffffffe); |
| 58 | Q_ASSERT(result < -1); |
| 59 | return result; |
| 60 | } |
| 61 | |
| 62 | ReturnedValue QV4::CppStackFrame::thisObject() const |
| 63 | { |
| 64 | if (isJSTypesFrame()) |
| 65 | return static_cast<const JSTypesStackFrame *>(this)->thisObject(); |
| 66 | |
| 67 | Q_ASSERT(isMetaTypesFrame()); |
| 68 | const auto metaTypesFrame = static_cast<const MetaTypesStackFrame *>(this); |
| 69 | return QObjectWrapper::wrap(engine: metaTypesFrame->context()->engine(), object: metaTypesFrame->thisObject()); |
| 70 | } |
| 71 |