Method _parse_stack_table

tools/fastgrind.py:644–658

(self)

        return display_names

    def _parse_stack_table(self) -> list[StackNode]:
        section = self.section_by_type[SECTION_STACK_TABLE]
        pos = section.offset
        end = pos + section.length
        nodes: list[StackNode] = []
        for expected_node_id in range(int(self.header["stack_node_count"])):
            self._require_range(pos, STACK_NODE_STRUCT.size)
            node_id, parent_id, function_id, depth, flags = STACK_NODE_STRUCT.unpack_from(self._mmap, pos)
            pos += STACK_NODE_STRUCT.size
            if node_id != expected_node_id:
                raise ValueError(f"stack node id {node_id} does not match its ordinal {expected_node_id}")
            nodes.append(StackNode(node_id, parent_id, function_id, depth, flags))
        if pos != end:
            raise ValueError("stack table size does not match the encoded payload")
        return nodes

    def _build_node_paths(self) -> tuple[list[tuple[int, ...]], list[frozenset[int]]]:
        paths: list[tuple[int, ...]] = [tuple() for _ in self.stack_nodes]