FunctionExecutable* UnlinkedFunctionExecutable::link(VM& vm, const SourceCode& ownerSource, int overrideLineNumber)
{
SourceCode source = m_sourceOverride ? SourceCode(m_sourceOverride) : ownerSource;
unsigned firstLine = source.firstLine() + m_firstLineOffset;
unsigned startOffset = source.startOffset() + m_startOffset;
unsigned lineCount = m_lineCount;
// Adjust to one-based indexing.
bool startColumnIsOnFirstSourceLine = !m_firstLineOffset;
unsigned startColumn = m_unlinkedBodyStartColumn + (startColumnIsOnFirstSourceLine ? source.startColumn() : 1);
bool endColumnIsOnStartLine = !lineCount;
unsigned endColumn = m_unlinkedBodyEndColumn + (endColumnIsOnStartLine ? startColumn : 1);
SourceCode code(source.provider(), startOffset, startOffset + m_sourceLength, firstLine, startColumn);
FunctionOverrides::OverrideInfo overrideInfo;
bool hasFunctionOverride = false;
if (UNLIKELY(Options::functionOverrides())) {
hasFunctionOverride = FunctionOverrides::initializeOverrideFor(code, overrideInfo);
if (hasFunctionOverride) {
firstLine = overrideInfo.firstLine;
lineCount = overrideInfo.lineCount;
startColumn = overrideInfo.startColumn;
endColumn = overrideInfo.endColumn;
code = overrideInfo.sourceCode;
}
}
FunctionExecutable* result = FunctionExecutable::create(vm, code, this, firstLine, firstLine + lineCount, startColumn, endColumn);
if (overrideLineNumber != -1)
result->setOverrideLineNumber(overrideLineNumber);
if (UNLIKELY(hasFunctionOverride)) {
result->overrideParameterAndTypeProfilingStartEndOffsets(
overrideInfo.parametersStartOffset,
overrideInfo.typeProfilingStartOffset,
overrideInfo.typeProfilingEndOffset);
}
return result;
}
