Method ParseExportTrie

view/macho/machoview.cpp:2563–2664

}

void MachoView::ParseExportTrie(BinaryReader& reader, linkedit_data_command exportTrie)
{
	try {
		uint32_t endGuard = exportTrie.datasize;
		DataBuffer buffer = GetParentView()
								->ReadBuffer(m_universalImageOffset + exportTrie.dataoff, exportTrie.datasize);

		struct Node
		{
			uint64_t cursor;
			std::string text;
		};
		std::vector<Node> stack;
		stack.reserve(64);
		stack.push_back({ /* cursor */ 0, /* text */ "" });

		while (!stack.empty())
		{
			m_logger->LogTrace("Export Trie: Processing node %s with cursor %llu", stack.back().text.c_str(), stack.back().cursor);
			Node node = std::move(stack.back());
			stack.pop_back();

			uint64_t cursor = node.cursor;
			const std::string currentText = std::move(node.text);

			if (cursor > endGuard)
			{
				m_logger->LogError("Export Trie: Cursor left trie during initial bounds check");
				throw ReadException();
			}

			size_t localCursor = cursor;
			uint64_t terminalSize = readValidULEB128(buffer, localCursor);
			uint64_t childOffset = localCursor + terminalSize;

			// If there's terminal data, define the symbol
			if (terminalSize != 0)
			{
				uint64_t flags = readValidULEB128(buffer, localCursor);
				uint64_t imageOffset = readValidULEB128(buffer, localCursor);
				m_logger->LogTrace("Export Trie: Found terminal node %s with flags %llx and image offset %llx", currentText.c_str(), flags, imageOffset);

				AddExportTerminalSymbol(currentText, flags, imageOffset);
			}

			localCursor = childOffset;
			if (localCursor > endGuard)
			{
				m_logger->LogError("Export Trie: Cursor left trie while moving to child offset");
				throw ReadException();
			}

			uint8_t childCount = buffer[localCursor++];
			if (localCursor > endGuard)
			{
				m_logger->LogError("Export Trie: Cursor left trie while reading child count");
				throw ReadException();
			}