mirror of
https://github.com/danog/psalm.git
synced 2024-12-15 10:57:08 +01:00
1003 lines
36 KiB
PHP
1003 lines
36 KiB
PHP
<?php
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namespace Psalm\Internal\Analyzer;
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use PhpParser;
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use Psalm\Internal\Analyzer\Statements\Block\DoAnalyzer;
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use Psalm\Internal\Analyzer\Statements\Block\ForAnalyzer;
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use Psalm\Internal\Analyzer\Statements\Block\ForeachAnalyzer;
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use Psalm\Internal\Analyzer\Statements\Block\IfElseAnalyzer;
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use Psalm\Internal\Analyzer\Statements\Block\SwitchAnalyzer;
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use Psalm\Internal\Analyzer\Statements\Block\TryAnalyzer;
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use Psalm\Internal\Analyzer\Statements\Block\WhileAnalyzer;
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use Psalm\Internal\Analyzer\Statements\Expression\AssignmentAnalyzer;
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use Psalm\Internal\Analyzer\Statements\Expression\Assignment\InstancePropertyAssignmentAnalyzer;
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use Psalm\Internal\Analyzer\Statements\Expression\Fetch\ClassConstFetchAnalyzer;
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use Psalm\Internal\Analyzer\Statements\Expression\Fetch\ConstFetchAnalyzer;
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use Psalm\Internal\Analyzer\Statements\Expression\Fetch\VariableFetchAnalyzer;
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use Psalm\Internal\Analyzer\Statements\Expression\SimpleTypeInferer;
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use Psalm\Internal\Analyzer\Statements\ExpressionAnalyzer;
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use Psalm\Internal\Analyzer\Statements\ReturnAnalyzer;
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use Psalm\Internal\Analyzer\Statements\ThrowAnalyzer;
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use Psalm\Internal\Scanner\ParsedDocblock;
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use Psalm\Internal\Codebase\DataFlowGraph;
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use Psalm\Internal\Codebase\TaintFlowGraph;
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use Psalm\Internal\Codebase\VariableUseGraph;
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use Psalm\Internal\DataFlow\DataFlowNode;
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use Psalm\Codebase;
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use Psalm\CodeLocation;
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use Psalm\Context;
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use Psalm\DocComment;
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use Psalm\Exception\DocblockParseException;
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use Psalm\FileManipulation;
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use Psalm\Internal\FileManipulation\FileManipulationBuffer;
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use Psalm\Issue\ComplexFunction;
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use Psalm\Issue\ComplexMethod;
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use Psalm\Issue\InvalidDocblock;
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use Psalm\Issue\MissingDocblockType;
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use Psalm\Issue\Trace;
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use Psalm\Issue\UndefinedTrace;
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use Psalm\Issue\UnevaluatedCode;
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use Psalm\Issue\UnrecognizedStatement;
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use Psalm\Issue\UnusedVariable;
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use Psalm\IssueBuffer;
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use Psalm\Type;
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use function strtolower;
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use function fwrite;
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use const STDERR;
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use function array_filter;
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use function array_merge;
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use function preg_split;
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use function get_class;
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use function strrpos;
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use function strlen;
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use function substr;
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use function array_change_key_case;
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use function trim;
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use function array_column;
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use function array_combine;
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use function array_keys;
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use function round;
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/**
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* @internal
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*/
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class StatementsAnalyzer extends SourceAnalyzer
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{
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/**
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* @var SourceAnalyzer
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*/
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protected $source;
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/**
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* @var FileAnalyzer
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*/
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protected $file_analyzer;
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/**
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* @var Codebase
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*/
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protected $codebase;
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/**
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* @var array<string, CodeLocation>
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*/
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private $all_vars = [];
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/**
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* @var array<string, int>
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*/
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private $var_branch_points = [];
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/**
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* Possibly undefined variables should be initialised if we're altering code
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*
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* @var array<string, int>|null
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*/
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private $vars_to_initialize;
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/**
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* @var array<string, FunctionAnalyzer>
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*/
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private $function_analyzers = [];
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/**
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* @var array<string, array{0: string, 1: CodeLocation}>
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*/
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private $unused_var_locations = [];
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/**
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* @var ?array<string, bool>
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*/
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public $byref_uses;
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/**
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* @var ParsedDocblock|null
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*/
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private $parsed_docblock = null;
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/**
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* @var ?string
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*/
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private $fake_this_class = null;
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/** @var \Psalm\Internal\Provider\NodeDataProvider */
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public $node_data;
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/** @var ?DataFlowGraph */
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public $data_flow_graph;
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public function __construct(SourceAnalyzer $source, \Psalm\Internal\Provider\NodeDataProvider $node_data)
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{
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$this->source = $source;
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$this->file_analyzer = $source->getFileAnalyzer();
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$this->codebase = $source->getCodebase();
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$this->node_data = $node_data;
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if ($this->codebase->taint_flow_graph) {
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$this->data_flow_graph = new TaintFlowGraph();
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} elseif ($this->codebase->find_unused_variables) {
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$this->data_flow_graph = new VariableUseGraph();
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}
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}
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/**
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* Checks an array of statements for validity
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*
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* @param array<PhpParser\Node\Stmt> $stmts
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*
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* @return null|false
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*/
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public function analyze(
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array $stmts,
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Context $context,
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?Context $global_context = null,
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bool $root_scope = false
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): ?bool {
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if (!$stmts) {
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return null;
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}
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// hoist functions to the top
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$this->hoistFunctions($stmts, $context);
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$project_analyzer = $this->getFileAnalyzer()->project_analyzer;
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$codebase = $project_analyzer->getCodebase();
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if ($codebase->config->hoist_constants) {
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self::hoistConstants($this, $stmts, $context);
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}
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foreach ($stmts as $stmt) {
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if (self::analyzeStatement($this, $stmt, $context, $global_context) === false) {
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return false;
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}
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}
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if ($root_scope
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&& !$context->collect_initializations
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&& !$context->collect_mutations
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&& $codebase->find_unused_variables
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&& $context->check_variables
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) {
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//var_dump($this->data_flow_graph);
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$this->checkUnreferencedVars($stmts);
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}
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if ($codebase->alter_code && $root_scope && $this->vars_to_initialize) {
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$file_contents = $codebase->getFileContents($this->getFilePath());
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foreach ($this->vars_to_initialize as $var_id => $branch_point) {
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$newline_pos = (int)strrpos($file_contents, "\n", $branch_point - strlen($file_contents)) + 1;
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$indentation = substr($file_contents, $newline_pos, $branch_point - $newline_pos);
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FileManipulationBuffer::add($this->getFilePath(), [
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new FileManipulation($branch_point, $branch_point, $var_id . ' = null;' . "\n" . $indentation),
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]);
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}
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}
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if ($root_scope
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&& $this->data_flow_graph instanceof TaintFlowGraph
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&& $this->codebase->taint_flow_graph
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&& $codebase->config->trackTaintsInPath($this->getFilePath())
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) {
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$this->codebase->taint_flow_graph->addGraph($this->data_flow_graph);
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}
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return null;
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}
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/**
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* @param array<PhpParser\Node\Stmt> $stmts
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*/
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private function hoistFunctions(array $stmts, Context $context) : void
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{
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foreach ($stmts as $stmt) {
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if ($stmt instanceof PhpParser\Node\Stmt\Function_) {
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$function_name = strtolower($stmt->name->name);
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if ($ns = $this->getNamespace()) {
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$fq_function_name = strtolower($ns) . '\\' . $function_name;
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} else {
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$fq_function_name = $function_name;
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}
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if ($this->data_flow_graph
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&& $this->codebase->find_unused_variables
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) {
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foreach ($stmt->stmts as $function_stmt) {
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if ($function_stmt instanceof PhpParser\Node\Stmt\Global_) {
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foreach ($function_stmt->vars as $var) {
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if (!$var instanceof PhpParser\Node\Expr\Variable
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|| !\is_string($var->name)
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) {
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continue;
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}
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$var_id = '$' . $var->name;
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if ($var_id !== '$argv' && $var_id !== '$argc') {
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$context->byref_constraints[$var_id] = new \Psalm\Internal\ReferenceConstraint();
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}
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}
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}
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}
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}
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try {
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$function_analyzer = new FunctionAnalyzer($stmt, $this->source);
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$this->function_analyzers[$fq_function_name] = $function_analyzer;
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} catch (\UnexpectedValueException $e) {
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// do nothing
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}
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}
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}
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}
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/**
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* @param array<PhpParser\Node\Stmt> $stmts
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*/
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private static function hoistConstants(
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StatementsAnalyzer $statements_analyzer,
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array $stmts,
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Context $context
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) : void {
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$codebase = $statements_analyzer->getCodebase();
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foreach ($stmts as $stmt) {
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if ($stmt instanceof PhpParser\Node\Stmt\Const_) {
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foreach ($stmt->consts as $const) {
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ConstFetchAnalyzer::setConstType(
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$statements_analyzer,
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$const->name->name,
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SimpleTypeInferer::infer(
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$codebase,
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$statements_analyzer->node_data,
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$const->value,
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$statements_analyzer->getAliases(),
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$statements_analyzer
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) ?: Type::getMixed(),
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$context
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);
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}
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} elseif ($stmt instanceof PhpParser\Node\Stmt\Expression
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&& $stmt->expr instanceof PhpParser\Node\Expr\FuncCall
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&& $stmt->expr->name instanceof PhpParser\Node\Name
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&& $stmt->expr->name->parts === ['define']
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&& isset($stmt->expr->args[1])
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) {
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$const_name = ConstFetchAnalyzer::getConstName(
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$stmt->expr->args[0]->value,
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$statements_analyzer->node_data,
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$codebase,
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$statements_analyzer->getAliases()
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);
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if ($const_name !== null) {
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ConstFetchAnalyzer::setConstType(
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$statements_analyzer,
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$const_name,
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Statements\Expression\SimpleTypeInferer::infer(
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$codebase,
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$statements_analyzer->node_data,
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$stmt->expr->args[1]->value,
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$statements_analyzer->getAliases(),
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$statements_analyzer
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) ?: Type::getMixed(),
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$context
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);
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}
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}
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}
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}
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/**
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* @return false|null
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*/
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private static function analyzeStatement(
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StatementsAnalyzer $statements_analyzer,
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PhpParser\Node\Stmt $stmt,
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Context $context,
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?Context $global_context
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): ?bool {
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$ignore_variable_property = false;
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$ignore_variable_method = false;
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$codebase = $statements_analyzer->getCodebase();
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if ($context->has_returned
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&& !$context->collect_initializations
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&& !$context->collect_mutations
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&& !($stmt instanceof PhpParser\Node\Stmt\Nop)
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&& !($stmt instanceof PhpParser\Node\Stmt\InlineHTML)
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) {
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if ($codebase->find_unused_variables) {
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if (IssueBuffer::accepts(
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new UnevaluatedCode(
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'Expressions after return/throw/continue',
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new CodeLocation($statements_analyzer->source, $stmt)
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),
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$statements_analyzer->source->getSuppressedIssues()
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)) {
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return false;
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}
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}
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return null;
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}
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if ($statements_analyzer->getProjectAnalyzer()->debug_lines) {
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fwrite(STDERR, $statements_analyzer->getFilePath() . ':' . $stmt->getLine() . "\n");
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}
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/*
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if (isset($context->vars_in_scope['$array']) && !$stmt instanceof PhpParser\Node\Stmt\Nop) {
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var_dump($stmt->getLine(), $context->vars_in_scope['$array']);
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}
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*/
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$new_issues = null;
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$traced_variables = [];
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if ($docblock = $stmt->getDocComment()) {
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$statements_analyzer->parseStatementDocblock($docblock, $stmt, $context);
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if (isset($statements_analyzer->parsed_docblock->tags['psalm-trace'])) {
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foreach ($statements_analyzer->parsed_docblock->tags['psalm-trace'] as $traced_variable_line) {
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$possible_traced_variable_names = preg_split('/[\s]+/', $traced_variable_line);
|
||
if ($possible_traced_variable_names) {
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$traced_variables = array_merge(
|
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$traced_variables,
|
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array_filter($possible_traced_variable_names)
|
||
);
|
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}
|
||
}
|
||
}
|
||
|
||
if (isset($statements_analyzer->parsed_docblock->tags['psalm-ignore-variable-method'])) {
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||
$context->ignore_variable_method = $ignore_variable_method = true;
|
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}
|
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if (isset($statements_analyzer->parsed_docblock->tags['psalm-ignore-variable-property'])) {
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||
$context->ignore_variable_property = $ignore_variable_property = true;
|
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}
|
||
|
||
if (isset($statements_analyzer->parsed_docblock->tags['psalm-suppress'])) {
|
||
$suppressed = $statements_analyzer->parsed_docblock->tags['psalm-suppress'];
|
||
if ($suppressed) {
|
||
$new_issues = [];
|
||
|
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foreach ($suppressed as $offset => $suppress_entry) {
|
||
foreach (DocComment::parseSuppressList($suppress_entry) as $issue_offset => $issue_type) {
|
||
$new_issues[$issue_offset + $offset + $docblock->getStartFilePos()] = $issue_type;
|
||
|
||
if ($issue_type === 'InaccessibleMethod') {
|
||
continue;
|
||
}
|
||
|
||
if ($codebase->track_unused_suppressions) {
|
||
IssueBuffer::addUnusedSuppression(
|
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$statements_analyzer->getFilePath(),
|
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$issue_offset + $offset + $docblock->getStartFilePos(),
|
||
$issue_type
|
||
);
|
||
}
|
||
}
|
||
}
|
||
|
||
$statements_analyzer->addSuppressedIssues($new_issues);
|
||
}
|
||
}
|
||
|
||
if (isset($statements_analyzer->parsed_docblock->combined_tags['var'])
|
||
&& !($stmt instanceof PhpParser\Node\Stmt\Expression
|
||
&& $stmt->expr instanceof PhpParser\Node\Expr\Assign)
|
||
&& !$stmt instanceof PhpParser\Node\Stmt\Foreach_
|
||
&& !$stmt instanceof PhpParser\Node\Stmt\Return_
|
||
) {
|
||
$file_path = $statements_analyzer->getRootFilePath();
|
||
|
||
$file_storage_provider = $codebase->file_storage_provider;
|
||
|
||
$file_storage = $file_storage_provider->get($file_path);
|
||
|
||
$template_type_map = $statements_analyzer->getTemplateTypeMap();
|
||
|
||
$var_comments = [];
|
||
|
||
try {
|
||
$var_comments = CommentAnalyzer::arrayToDocblocks(
|
||
$docblock,
|
||
$statements_analyzer->parsed_docblock,
|
||
$statements_analyzer->getSource(),
|
||
$statements_analyzer->getAliases(),
|
||
$template_type_map,
|
||
$file_storage->type_aliases
|
||
);
|
||
} catch (\Psalm\Exception\IncorrectDocblockException $e) {
|
||
if (IssueBuffer::accepts(
|
||
new MissingDocblockType(
|
||
(string)$e->getMessage(),
|
||
new CodeLocation($statements_analyzer->getSource(), $stmt)
|
||
)
|
||
)) {
|
||
// fall through
|
||
}
|
||
} catch (\Psalm\Exception\DocblockParseException $e) {
|
||
if (IssueBuffer::accepts(
|
||
new InvalidDocblock(
|
||
(string)$e->getMessage(),
|
||
new CodeLocation($statements_analyzer->getSource(), $stmt)
|
||
)
|
||
)) {
|
||
// fall through
|
||
}
|
||
}
|
||
|
||
foreach ($var_comments as $var_comment) {
|
||
AssignmentAnalyzer::assignTypeFromVarDocblock(
|
||
$statements_analyzer,
|
||
$stmt,
|
||
$var_comment,
|
||
$context
|
||
);
|
||
}
|
||
}
|
||
} else {
|
||
$statements_analyzer->parsed_docblock = null;
|
||
}
|
||
|
||
if ($stmt instanceof PhpParser\Node\Stmt\If_) {
|
||
if (IfElseAnalyzer::analyze($statements_analyzer, $stmt, $context) === false) {
|
||
return false;
|
||
}
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\TryCatch) {
|
||
if (TryAnalyzer::analyze($statements_analyzer, $stmt, $context) === false) {
|
||
return false;
|
||
}
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\For_) {
|
||
if (ForAnalyzer::analyze($statements_analyzer, $stmt, $context) === false) {
|
||
return false;
|
||
}
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Foreach_) {
|
||
if (ForeachAnalyzer::analyze($statements_analyzer, $stmt, $context) === false) {
|
||
return false;
|
||
}
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\While_) {
|
||
if (WhileAnalyzer::analyze($statements_analyzer, $stmt, $context) === false) {
|
||
return false;
|
||
}
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Do_) {
|
||
DoAnalyzer::analyze($statements_analyzer, $stmt, $context);
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Const_) {
|
||
ConstFetchAnalyzer::analyzeConstAssignment($statements_analyzer, $stmt, $context);
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Unset_) {
|
||
Statements\UnsetAnalyzer::analyze($statements_analyzer, $stmt, $context);
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Return_) {
|
||
ReturnAnalyzer::analyze($statements_analyzer, $stmt, $context);
|
||
$context->has_returned = true;
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Throw_) {
|
||
ThrowAnalyzer::analyze($statements_analyzer, $stmt, $context);
|
||
$context->has_returned = true;
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Switch_) {
|
||
SwitchAnalyzer::analyze($statements_analyzer, $stmt, $context);
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Break_) {
|
||
Statements\BreakAnalyzer::analyze($statements_analyzer, $stmt, $context);
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Continue_) {
|
||
Statements\ContinueAnalyzer::analyze($statements_analyzer, $stmt, $context);
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Static_) {
|
||
Statements\StaticAnalyzer::analyze($statements_analyzer, $stmt, $context);
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Echo_) {
|
||
if (Statements\EchoAnalyzer::analyze($statements_analyzer, $stmt, $context) === false) {
|
||
return false;
|
||
}
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Function_) {
|
||
FunctionAnalyzer::analyzeStatement($statements_analyzer, $stmt, $context);
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Expression) {
|
||
if (ExpressionAnalyzer::analyze(
|
||
$statements_analyzer,
|
||
$stmt->expr,
|
||
$context,
|
||
false,
|
||
$global_context,
|
||
true
|
||
) === false) {
|
||
return false;
|
||
}
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\InlineHTML) {
|
||
// do nothing
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Global_) {
|
||
Statements\GlobalAnalyzer::analyze($statements_analyzer, $stmt, $context, $global_context);
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Property) {
|
||
InstancePropertyAssignmentAnalyzer::analyzeStatement($statements_analyzer, $stmt, $context);
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\ClassConst) {
|
||
ClassConstFetchAnalyzer::analyzeClassConstAssignment($statements_analyzer, $stmt, $context);
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Class_) {
|
||
try {
|
||
$class_analyzer = new ClassAnalyzer(
|
||
$stmt,
|
||
$statements_analyzer->source,
|
||
$stmt->name ? $stmt->name->name : null
|
||
);
|
||
|
||
$class_analyzer->analyze(null, $global_context);
|
||
} catch (\InvalidArgumentException $e) {
|
||
// disregard this exception, we'll likely see it elsewhere in the form
|
||
// of an issue
|
||
}
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Nop) {
|
||
// do nothing
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Goto_) {
|
||
// do nothing
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Label) {
|
||
// do nothing
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\Declare_) {
|
||
foreach ($stmt->declares as $declaration) {
|
||
if ((string) $declaration->key === 'strict_types'
|
||
&& $declaration->value instanceof PhpParser\Node\Scalar\LNumber
|
||
&& $declaration->value->value === 1
|
||
) {
|
||
$context->strict_types = true;
|
||
}
|
||
}
|
||
} elseif ($stmt instanceof PhpParser\Node\Stmt\HaltCompiler) {
|
||
$context->has_returned = true;
|
||
} else {
|
||
if (IssueBuffer::accepts(
|
||
new UnrecognizedStatement(
|
||
'Psalm does not understand ' . get_class($stmt),
|
||
new CodeLocation($statements_analyzer->source, $stmt)
|
||
),
|
||
$statements_analyzer->getSuppressedIssues()
|
||
)) {
|
||
return false;
|
||
}
|
||
}
|
||
|
||
$codebase = $statements_analyzer->getCodebase();
|
||
|
||
$plugin_classes = $codebase->config->after_statement_checks;
|
||
|
||
if ($plugin_classes) {
|
||
$file_manipulations = [];
|
||
|
||
foreach ($plugin_classes as $plugin_fq_class_name) {
|
||
if ($plugin_fq_class_name::afterStatementAnalysis(
|
||
$stmt,
|
||
$context,
|
||
$statements_analyzer,
|
||
$codebase,
|
||
$file_manipulations
|
||
) === false) {
|
||
return false;
|
||
}
|
||
}
|
||
|
||
if ($file_manipulations) {
|
||
FileManipulationBuffer::add($statements_analyzer->getFilePath(), $file_manipulations);
|
||
}
|
||
}
|
||
|
||
if ($new_issues) {
|
||
$statements_analyzer->removeSuppressedIssues($new_issues);
|
||
}
|
||
|
||
if ($ignore_variable_property) {
|
||
$context->ignore_variable_property = false;
|
||
}
|
||
|
||
if ($ignore_variable_method) {
|
||
$context->ignore_variable_method = false;
|
||
}
|
||
|
||
foreach ($traced_variables as $traced_variable) {
|
||
if (isset($context->vars_in_scope[$traced_variable])) {
|
||
if (IssueBuffer::accepts(
|
||
new Trace(
|
||
$traced_variable . ': ' . $context->vars_in_scope[$traced_variable]->getId(),
|
||
new CodeLocation($statements_analyzer->source, $stmt)
|
||
),
|
||
$statements_analyzer->getSuppressedIssues()
|
||
)) {
|
||
// fall through
|
||
}
|
||
} else {
|
||
if (IssueBuffer::accepts(
|
||
new UndefinedTrace(
|
||
'Attempt to trace undefined variable ' . $traced_variable,
|
||
new CodeLocation($statements_analyzer->source, $stmt)
|
||
),
|
||
$statements_analyzer->getSuppressedIssues()
|
||
)) {
|
||
// fall through
|
||
}
|
||
}
|
||
}
|
||
|
||
return null;
|
||
}
|
||
|
||
private function parseStatementDocblock(
|
||
PhpParser\Comment\Doc $docblock,
|
||
PhpParser\Node\Stmt $stmt,
|
||
Context $context
|
||
) : void {
|
||
$codebase = $this->getCodebase();
|
||
|
||
try {
|
||
$this->parsed_docblock = DocComment::parsePreservingLength($docblock);
|
||
} catch (DocblockParseException $e) {
|
||
if (IssueBuffer::accepts(
|
||
new InvalidDocblock(
|
||
(string)$e->getMessage(),
|
||
new CodeLocation($this->getSource(), $stmt, null, true)
|
||
)
|
||
)) {
|
||
// fall through
|
||
}
|
||
|
||
$this->parsed_docblock = null;
|
||
}
|
||
|
||
$comments = $this->parsed_docblock;
|
||
|
||
if (isset($comments->tags['psalm-scope-this'])) {
|
||
$trimmed = trim(\reset($comments->tags['psalm-scope-this']));
|
||
|
||
if (!$codebase->classExists($trimmed)) {
|
||
if (IssueBuffer::accepts(
|
||
new \Psalm\Issue\UndefinedDocblockClass(
|
||
'Scope class ' . $trimmed . ' does not exist',
|
||
new CodeLocation($this->getSource(), $stmt, null, true),
|
||
$trimmed
|
||
)
|
||
)) {
|
||
// fall through
|
||
}
|
||
} else {
|
||
$this_type = Type::parseString($trimmed);
|
||
$context->self = $trimmed;
|
||
$context->vars_in_scope['$this'] = $this_type;
|
||
$this->setFQCLN($trimmed);
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @param array<PhpParser\Node\Stmt> $stmts
|
||
*/
|
||
public function checkUnreferencedVars(array $stmts): void
|
||
{
|
||
$source = $this->getSource();
|
||
$codebase = $source->getCodebase();
|
||
$function_storage = $source instanceof FunctionLikeAnalyzer ? $source->getFunctionLikeStorage($this) : null;
|
||
$var_list = array_column($this->unused_var_locations, 0);
|
||
$loc_list = array_column($this->unused_var_locations, 1);
|
||
|
||
$project_analyzer = $this->getProjectAnalyzer();
|
||
|
||
$unused_var_remover = new Statements\UnusedAssignmentRemover();
|
||
|
||
if ($this->data_flow_graph instanceof VariableUseGraph
|
||
&& $codebase->config->limit_method_complexity
|
||
&& $source instanceof FunctionLikeAnalyzer
|
||
&& !$source instanceof ClosureAnalyzer
|
||
&& $function_storage
|
||
&& $function_storage->location
|
||
) {
|
||
[$count, , $unique_destinations, $mean] = $this->data_flow_graph->getEdgeStats();
|
||
|
||
$average_destination_branches_converging = $unique_destinations > 0 ? $count / $unique_destinations : 0;
|
||
|
||
if ($count > $codebase->config->max_graph_size
|
||
&& $mean > $codebase->config->max_avg_path_length
|
||
&& $average_destination_branches_converging > 1.1
|
||
) {
|
||
if ($source instanceof FunctionAnalyzer) {
|
||
if (IssueBuffer::accepts(
|
||
new ComplexFunction(
|
||
'This function’s complexity is greater than the project limit'
|
||
. ' (method graph size = ' . $count .', average path length = ' . round($mean). ')',
|
||
$function_storage->location
|
||
),
|
||
$this->getSuppressedIssues(),
|
||
true
|
||
)) {
|
||
// fall through
|
||
}
|
||
} elseif ($source instanceof MethodAnalyzer) {
|
||
if (IssueBuffer::accepts(
|
||
new ComplexMethod(
|
||
'This method’s complexity is greater than the project limit'
|
||
. ' (method graph size = ' . $count .', average path length = ' . round($mean) . ')',
|
||
$function_storage->location
|
||
),
|
||
$this->getSuppressedIssues(),
|
||
true
|
||
)) {
|
||
// fall through
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
foreach ($this->unused_var_locations as [$var_id, $original_location]) {
|
||
if (substr($var_id, 0, 2) === '$_') {
|
||
continue;
|
||
}
|
||
|
||
if ($function_storage) {
|
||
$param_index = \array_search(substr($var_id, 1), array_keys($function_storage->param_lookup));
|
||
if ($param_index !== false) {
|
||
$param = $function_storage->params[$param_index];
|
||
|
||
if ($param->location
|
||
&& ($original_location->raw_file_end === $param->location->raw_file_end
|
||
|| $param->by_ref)
|
||
) {
|
||
continue;
|
||
}
|
||
}
|
||
}
|
||
|
||
$assignment_node = DataFlowNode::getForAssignment($var_id, $original_location);
|
||
|
||
if (!isset($this->byref_uses[$var_id])
|
||
&& !VariableFetchAnalyzer::isSuperGlobal($var_id)
|
||
&& $this->data_flow_graph instanceof VariableUseGraph
|
||
&& !$this->data_flow_graph->isVariableUsed($assignment_node)
|
||
) {
|
||
$issue = new UnusedVariable(
|
||
$var_id . ' is never referenced or the value is not used',
|
||
$original_location
|
||
);
|
||
|
||
if ($codebase->alter_code
|
||
&& !$unused_var_remover->checkIfVarRemoved($var_id, $original_location)
|
||
&& isset($project_analyzer->getIssuesToFix()['UnusedVariable'])
|
||
&& !IssueBuffer::isSuppressed($issue, $this->getSuppressedIssues())
|
||
) {
|
||
$unused_var_remover->findUnusedAssignment(
|
||
$this->getCodebase(),
|
||
$stmts,
|
||
array_combine($var_list, $loc_list),
|
||
$var_id,
|
||
$original_location
|
||
);
|
||
}
|
||
|
||
if (IssueBuffer::accepts(
|
||
$issue,
|
||
$this->getSuppressedIssues(),
|
||
true
|
||
)) {
|
||
// fall through
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
public function hasVariable(string $var_name): bool
|
||
{
|
||
return isset($this->all_vars[$var_name]);
|
||
}
|
||
|
||
public function registerVariable(string $var_id, CodeLocation $location, ?int $branch_point): void
|
||
{
|
||
$this->all_vars[$var_id] = $location;
|
||
|
||
if ($branch_point) {
|
||
$this->var_branch_points[$var_id] = $branch_point;
|
||
}
|
||
|
||
$this->registerVariableAssignment($var_id, $location);
|
||
}
|
||
|
||
public function registerVariableAssignment(string $var_id, CodeLocation $location): void
|
||
{
|
||
$this->unused_var_locations[$location->getHash()] = [$var_id, $location];
|
||
}
|
||
|
||
/**
|
||
* @return array<string, array{0: string, 1: CodeLocation}>
|
||
*/
|
||
public function getUnusedVarLocations(): array
|
||
{
|
||
return $this->unused_var_locations;
|
||
}
|
||
|
||
public function registerPossiblyUndefinedVariable(
|
||
string $undefined_var_id,
|
||
PhpParser\Node\Expr\Variable $stmt
|
||
) : void {
|
||
if (!$this->data_flow_graph) {
|
||
return;
|
||
}
|
||
|
||
$use_location = new CodeLocation($this->getSource(), $stmt);
|
||
$use_node = DataFlowNode::getForAssignment($undefined_var_id, $use_location);
|
||
|
||
$stmt_type = $this->node_data->getType($stmt);
|
||
|
||
if ($stmt_type) {
|
||
$stmt_type->parent_nodes[$use_node->id] = $use_node;
|
||
}
|
||
|
||
foreach ($this->unused_var_locations as [$var_id, $original_location]) {
|
||
if ($var_id === $undefined_var_id) {
|
||
$parent_node = DataFlowNode::getForAssignment($var_id, $original_location);
|
||
|
||
$this->data_flow_graph->addPath($parent_node, $use_node, '=');
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @return array<string, DataFlowNode>
|
||
*/
|
||
public function getParentNodesForPossiblyUndefinedVariable(string $undefined_var_id) : array
|
||
{
|
||
if (!$this->data_flow_graph) {
|
||
return [];
|
||
}
|
||
|
||
$parent_nodes = [];
|
||
|
||
foreach ($this->unused_var_locations as [$var_id, $original_location]) {
|
||
if ($var_id === $undefined_var_id) {
|
||
$assignment_node = DataFlowNode::getForAssignment($var_id, $original_location);
|
||
$parent_nodes[$assignment_node->id] = $assignment_node;
|
||
}
|
||
}
|
||
|
||
return $parent_nodes;
|
||
}
|
||
|
||
/**
|
||
* The first appearance of the variable in this set of statements being evaluated
|
||
*/
|
||
public function getFirstAppearance(string $var_id): ?CodeLocation
|
||
{
|
||
return isset($this->all_vars[$var_id]) ? $this->all_vars[$var_id] : null;
|
||
}
|
||
|
||
public function getBranchPoint(string $var_id): ?int
|
||
{
|
||
return isset($this->var_branch_points[$var_id]) ? $this->var_branch_points[$var_id] : null;
|
||
}
|
||
|
||
public function addVariableInitialization(string $var_id, int $branch_point): void
|
||
{
|
||
$this->vars_to_initialize[$var_id] = $branch_point;
|
||
}
|
||
|
||
public function getFileAnalyzer() : FileAnalyzer
|
||
{
|
||
return $this->file_analyzer;
|
||
}
|
||
|
||
public function getCodebase() : Codebase
|
||
{
|
||
return $this->codebase;
|
||
}
|
||
|
||
/**
|
||
* @return array<string, FunctionAnalyzer>
|
||
*/
|
||
public function getFunctionAnalyzers(): array
|
||
{
|
||
return $this->function_analyzers;
|
||
}
|
||
|
||
/**
|
||
* @param array<string, bool> $byref_uses
|
||
*/
|
||
public function setByRefUses(array $byref_uses): void
|
||
{
|
||
$this->byref_uses = $byref_uses;
|
||
}
|
||
|
||
/**
|
||
* @return array<string, array<array-key, CodeLocation>>
|
||
*/
|
||
public function getUncaughtThrows(Context $context): array
|
||
{
|
||
$uncaught_throws = [];
|
||
|
||
if ($context->collect_exceptions) {
|
||
if ($context->possibly_thrown_exceptions) {
|
||
$config = $this->codebase->config;
|
||
$ignored_exceptions = array_change_key_case(
|
||
$context->is_global ?
|
||
$config->ignored_exceptions_in_global_scope :
|
||
$config->ignored_exceptions
|
||
);
|
||
$ignored_exceptions_and_descendants = array_change_key_case(
|
||
$context->is_global ?
|
||
$config->ignored_exceptions_and_descendants_in_global_scope :
|
||
$config->ignored_exceptions_and_descendants
|
||
);
|
||
|
||
foreach ($context->possibly_thrown_exceptions as $possibly_thrown_exception => $codelocations) {
|
||
if (isset($ignored_exceptions[strtolower($possibly_thrown_exception)])) {
|
||
continue;
|
||
}
|
||
|
||
$is_expected = false;
|
||
|
||
foreach ($ignored_exceptions_and_descendants as $expected_exception => $_) {
|
||
try {
|
||
if ($expected_exception === strtolower($possibly_thrown_exception)
|
||
|| $this->codebase->classExtends($possibly_thrown_exception, $expected_exception)
|
||
) {
|
||
$is_expected = true;
|
||
break;
|
||
}
|
||
} catch (\InvalidArgumentException $e) {
|
||
$is_expected = true;
|
||
break;
|
||
}
|
||
}
|
||
|
||
if (!$is_expected) {
|
||
$uncaught_throws[$possibly_thrown_exception] = $codelocations;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
return $uncaught_throws;
|
||
}
|
||
|
||
public function getFunctionAnalyzer(string $function_id) : ?FunctionAnalyzer
|
||
{
|
||
return $this->function_analyzers[$function_id] ?? null;
|
||
}
|
||
|
||
public function getParsedDocblock() : ?ParsedDocblock
|
||
{
|
||
return $this->parsed_docblock;
|
||
}
|
||
|
||
public function getFQCLN(): ?string
|
||
{
|
||
if ($this->fake_this_class) {
|
||
return $this->fake_this_class;
|
||
}
|
||
|
||
return parent::getFQCLN();
|
||
}
|
||
|
||
public function setFQCLN(string $fake_this_class) : void
|
||
{
|
||
$this->fake_this_class = $fake_this_class;
|
||
}
|
||
|
||
/**
|
||
* @return \Psalm\Internal\Provider\NodeDataProvider
|
||
*/
|
||
public function getNodeTypeProvider() : \Psalm\NodeTypeProvider
|
||
{
|
||
return $this->node_data;
|
||
}
|
||
}
|