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51bc6233b2
If @generate-function-entries is specified in the stub file, also generate function entries for the extension. Currently limited to free functions only.
748 lines
23 KiB
PHP
748 lines
23 KiB
PHP
#!/usr/bin/env php
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<?php declare(strict_types=1);
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use PhpParser\Comment\Doc as DocComment;
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use PhpParser\Node;
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use PhpParser\Node\Expr;
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use PhpParser\Node\Stmt;
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error_reporting(E_ALL);
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try {
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initPhpParser();
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} catch (Exception $e) {
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echo "{$e->getMessage()}\n";
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exit(1);
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}
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if ($argc >= 2) {
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if (is_file($argv[1])) {
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// Generate single file.
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processStubFile($argv[1]);
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} else if (is_dir($argv[1])) {
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processDirectory($argv[1]);
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} else {
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echo "$argv[1] is neither a file nor a directory.\n";
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exit(1);
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}
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} else {
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// Regenerate all stub files we can find.
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processDirectory('.');
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}
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function processDirectory(string $dir) {
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$it = new RecursiveIteratorIterator(
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new RecursiveDirectoryIterator($dir),
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RecursiveIteratorIterator::LEAVES_ONLY
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);
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foreach ($it as $file) {
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$pathName = $file->getPathName();
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if (preg_match('/\.stub\.php$/', $pathName)) {
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processStubFile($pathName);
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}
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}
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}
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function processStubFile(string $stubFile) {
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$arginfoFile = str_replace('.stub.php', '', $stubFile) . '_arginfo.h';
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try {
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$fileInfo = parseStubFile($stubFile);
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$arginfoCode = generateArgInfoCode($fileInfo);
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file_put_contents($arginfoFile, $arginfoCode);
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} catch (Exception $e) {
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echo "In $stubFile:\n{$e->getMessage()}\n";
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exit(1);
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}
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}
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class SimpleType {
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/** @var string */
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public $name;
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/** @var bool */
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public $isBuiltin;
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public function __construct(string $name, bool $isBuiltin) {
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$this->name = $name;
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$this->isBuiltin = $isBuiltin;
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}
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public static function fromNode(Node $node) {
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if ($node instanceof Node\Name) {
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assert($node->isFullyQualified());
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return new SimpleType($node->toString(), false);
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}
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if ($node instanceof Node\Identifier) {
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return new SimpleType($node->toString(), true);
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}
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throw new Exception("Unexpected node type");
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}
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public function isNull() {
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return $this->isBuiltin && $this->name === 'null';
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}
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public function toTypeCode() {
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assert($this->isBuiltin);
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switch (strtolower($this->name)) {
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case "bool":
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return "_IS_BOOL";
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case "int":
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return "IS_LONG";
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case "float":
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return "IS_DOUBLE";
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case "string":
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return "IS_STRING";
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case "array":
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return "IS_ARRAY";
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case "object":
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return "IS_OBJECT";
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case "void":
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return "IS_VOID";
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case "callable":
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return "IS_CALLABLE";
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default:
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throw new Exception("Not implemented: $this->name");
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}
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}
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public function toTypeMask() {
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assert($this->isBuiltin);
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switch (strtolower($this->name)) {
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case "null":
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return "MAY_BE_NULL";
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case "false":
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return "MAY_BE_FALSE";
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case "bool":
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return "MAY_BE_BOOL";
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case "int":
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return "MAY_BE_LONG";
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case "float":
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return "MAY_BE_DOUBLE";
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case "string":
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return "MAY_BE_STRING";
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case "array":
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return "MAY_BE_ARRAY";
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case "object":
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return "MAY_BE_OBJECT";
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case "callable":
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return "MAY_BE_CALLABLE";
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default:
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throw new Exception("Not implemented: $this->name");
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}
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}
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public function toEscapedName(): string {
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return str_replace('\\', '\\\\', $this->name);
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}
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public function equals(SimpleType $other) {
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return $this->name === $other->name
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&& $this->isBuiltin === $other->isBuiltin;
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}
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}
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class Type {
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/** @var SimpleType[] $types */
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public $types;
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public function __construct(array $types) {
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$this->types = $types;
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}
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public static function fromNode(Node $node) {
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if ($node instanceof Node\UnionType) {
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return new Type(array_map(['SimpleType', 'fromNode'], $node->types));
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}
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if ($node instanceof Node\NullableType) {
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return new Type([
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SimpleType::fromNode($node->type),
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new SimpleType('null', true),
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]);
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}
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return new Type([SimpleType::fromNode($node)]);
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}
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public function isNullable(): bool {
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foreach ($this->types as $type) {
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if ($type->isNull()) {
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return true;
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}
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}
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return false;
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}
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public function getWithoutNull(): Type {
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return new Type(array_filter($this->types, function(SimpleType $type) {
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return !$type->isNull();
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}));
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}
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public function tryToSimpleType(): ?SimpleType {
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$withoutNull = $this->getWithoutNull();
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if (count($withoutNull->types) === 1) {
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return $withoutNull->types[0];
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}
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return null;
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}
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public function tryToRepresentableType(): ?RepresentableType {
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$classType = null;
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$builtinTypes = [];
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foreach ($this->types as $type) {
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if ($type->isBuiltin) {
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$builtinTypes[] = $type;
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} else if ($classType === null) {
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$classType = $type;
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} else {
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// We can only represent a single class type.
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return false;
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}
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}
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return new RepresentableType($classType, $builtinTypes);
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}
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public static function equals(?Type $a, ?Type $b): bool {
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if ($a === null || $b === null) {
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return $a === $b;
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}
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if (count($a->types) !== count($b->types)) {
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return false;
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}
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for ($i = 0; $i < count($a->types); $i++) {
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if (!$a->types[$i]->equals($b->types[$i])) {
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return false;
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}
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}
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return true;
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}
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}
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class RepresentableType {
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/** @var ?SimpleType $classType */
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public $classType;
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/** @var SimpleType[] $builtinTypes */
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public $builtinTypes;
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public function __construct(?SimpleType $classType, array $builtinTypes) {
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$this->classType = $classType;
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$this->builtinTypes = $builtinTypes;
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}
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public function toTypeMask(): string {
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return implode('|', array_map(function(SimpleType $type) {
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return $type->toTypeMask();
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}, $this->builtinTypes));
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}
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}
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class ArgInfo {
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const SEND_BY_VAL = 0;
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const SEND_BY_REF = 1;
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const SEND_PREFER_REF = 2;
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/** @var string */
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public $name;
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/** @var int */
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public $sendBy;
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/** @var bool */
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public $isVariadic;
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/** @var Type|null */
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public $type;
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public function __construct(string $name, int $sendBy, bool $isVariadic, ?Type $type) {
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$this->name = $name;
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$this->sendBy = $sendBy;
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$this->isVariadic = $isVariadic;
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$this->type = $type;
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}
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public function equals(ArgInfo $other): bool {
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return $this->name === $other->name
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&& $this->sendBy === $other->sendBy
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&& $this->isVariadic === $other->isVariadic
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&& Type::equals($this->type, $other->type);
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}
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public function getSendByString(): string {
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switch ($this->sendBy) {
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case self::SEND_BY_VAL:
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return "0";
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case self::SEND_BY_REF:
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return "1";
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case self::SEND_PREFER_REF:
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return "ZEND_SEND_PREFER_REF";
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}
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throw new Exception("Invalid sendBy value");
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}
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}
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class ReturnInfo {
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/** @var bool */
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public $byRef;
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/** @var Type|null */
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public $type;
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public function __construct(bool $byRef, ?Type $type) {
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$this->byRef = $byRef;
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$this->type = $type;
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}
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public function equals(ReturnInfo $other): bool {
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return $this->byRef === $other->byRef
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&& Type::equals($this->type, $other->type);
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}
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}
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class FuncInfo {
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/** @var string */
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public $name;
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/** @var ?string */
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public $className;
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/** @var ?string */
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public $alias;
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/** @var ArgInfo[] */
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public $args;
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/** @var ReturnInfo */
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public $return;
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/** @var int */
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public $numRequiredArgs;
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/** @var string|null */
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public $cond;
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public function __construct(
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string $name, ?string $className, ?string $alias, array $args, ReturnInfo $return,
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int $numRequiredArgs, ?string $cond
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) {
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$this->name = $name;
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$this->className = $className;
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$this->alias = $alias;
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$this->args = $args;
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$this->return = $return;
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$this->numRequiredArgs = $numRequiredArgs;
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$this->cond = $cond;
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}
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public function equalsApartFromName(FuncInfo $other): bool {
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if (count($this->args) !== count($other->args)) {
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return false;
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}
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for ($i = 0; $i < count($this->args); $i++) {
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if (!$this->args[$i]->equals($other->args[$i])) {
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return false;
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}
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}
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return $this->return->equals($other->return)
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&& $this->numRequiredArgs === $other->numRequiredArgs
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&& $this->cond === $other->cond;
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}
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public function getArgInfoName(): string {
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if ($this->className) {
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return 'arginfo_class_' . $this->className . '_' . $this->name;
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}
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return 'arginfo_' . $this->name;
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}
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}
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class FileInfo {
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/** @var FuncInfo[] */
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public $funcInfos;
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/** @var bool */
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public $generateFunctionEntries;
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public function __construct(array $funcInfos, bool $generateFunctionEntries) {
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$this->funcInfos = $funcInfos;
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$this->generateFunctionEntries = $generateFunctionEntries;
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}
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}
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function parseFunctionLike(
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string $name, ?string $className, Node\FunctionLike $func, ?string $cond
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): FuncInfo {
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$comment = $func->getDocComment();
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$paramMeta = [];
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$alias = null;
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if ($comment) {
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$commentText = substr($comment->getText(), 2, -2);
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foreach (explode("\n", $commentText) as $commentLine) {
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if (preg_match('/^\*\s*@prefer-ref\s+\$(.+)$/', trim($commentLine), $matches)) {
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$varName = $matches[1];
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if (!isset($paramMeta[$varName])) {
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$paramMeta[$varName] = [];
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}
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$paramMeta[$varName]['preferRef'] = true;
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} else if (preg_match('/^\*\s*@alias\s+(.+)$/', trim($commentLine), $matches)) {
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$alias = $matches[1];
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}
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}
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}
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$args = [];
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$numRequiredArgs = 0;
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$foundVariadic = false;
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foreach ($func->getParams() as $i => $param) {
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$varName = $param->var->name;
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$preferRef = !empty($paramMeta[$varName]['preferRef']);
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unset($paramMeta[$varName]);
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if ($preferRef) {
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$sendBy = ArgInfo::SEND_PREFER_REF;
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} else if ($param->byRef) {
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$sendBy = ArgInfo::SEND_BY_REF;
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} else {
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$sendBy = ArgInfo::SEND_BY_VAL;
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}
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if ($foundVariadic) {
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throw new Exception("Error in function $name: only the last parameter can be variadic");
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}
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$type = $param->type ? Type::fromNode($param->type) : null;
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if ($param->default instanceof Expr\ConstFetch &&
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$param->default->name->toLowerString() === "null" &&
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$type && !$type->isNullable()
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) {
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throw new Exception(
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"Parameter $varName of function $name has null default, but is not nullable");
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}
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$foundVariadic = $param->variadic;
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$args[] = new ArgInfo(
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$varName,
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$sendBy,
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$param->variadic,
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$type
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);
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if (!$param->default && !$param->variadic) {
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$numRequiredArgs = $i + 1;
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}
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}
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foreach (array_keys($paramMeta) as $var) {
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throw new Exception("Found metadata for invalid param $var of function $name");
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}
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$returnType = $func->getReturnType();
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$return = new ReturnInfo(
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$func->returnsByRef(),
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$returnType ? Type::fromNode($returnType) : null);
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return new FuncInfo($name, $className, $alias, $args, $return, $numRequiredArgs, $cond);
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}
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function handlePreprocessorConditions(array &$conds, Stmt $stmt): ?string {
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foreach ($stmt->getComments() as $comment) {
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$text = trim($comment->getText());
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if (preg_match('/^#\s*if\s+(.+)$/', $text, $matches)) {
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$conds[] = $matches[1];
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} else if (preg_match('/^#\s*ifdef\s+(.+)$/', $text, $matches)) {
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$conds[] = "defined($matches[1])";
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} else if (preg_match('/^#\s*ifndef\s+(.+)$/', $text, $matches)) {
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$conds[] = "!defined($matches[1])";
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} else if (preg_match('/^#\s*else$/', $text)) {
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if (empty($conds)) {
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throw new Exception("Encountered else without corresponding #if");
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}
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$cond = array_pop($conds);
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$conds[] = "!($cond)";
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} else if (preg_match('/^#\s*endif$/', $text)) {
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if (empty($conds)) {
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throw new Exception("Encountered #endif without corresponding #if");
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}
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array_pop($conds);
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} else if ($text[0] === '#') {
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throw new Exception("Unrecognized preprocessor directive \"$text\"");
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}
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}
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return empty($conds) ? null : implode(' && ', $conds);
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}
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function getFileDocComment(array $stmts): ?DocComment {
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if (empty($stmts)) {
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return null;
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}
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$comments = $stmts[0]->getComments();
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if (empty($comments)) {
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return null;
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}
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if ($comments[0] instanceof DocComment) {
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return $comments[0];
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}
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return null;
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}
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function parseStubFile(string $fileName): FileInfo {
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if (!file_exists($fileName)) {
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throw new Exception("File $fileName does not exist");
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}
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$code = file_get_contents($fileName);
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$lexer = new PhpParser\Lexer();
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$parser = new PhpParser\Parser\Php7($lexer);
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$nodeTraverser = new PhpParser\NodeTraverser;
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$nodeTraverser->addVisitor(new PhpParser\NodeVisitor\NameResolver);
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$stmts = $parser->parse($code);
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$nodeTraverser->traverse($stmts);
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$generateFunctionEntries = false;
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$fileDocComment = getFileDocComment($stmts);
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if ($fileDocComment) {
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if (strpos($fileDocComment->getText(), '@generate-function-entries') !== false) {
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$generateFunctionEntries = true;
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}
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}
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$funcInfos = [];
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$conds = [];
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foreach ($stmts as $stmt) {
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$cond = handlePreprocessorConditions($conds, $stmt);
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if ($stmt instanceof Stmt\Nop) {
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continue;
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}
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if ($stmt instanceof Stmt\Function_) {
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$funcInfos[] = parseFunctionLike($stmt->name->toString(), null, $stmt, $cond);
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continue;
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}
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if ($stmt instanceof Stmt\ClassLike) {
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$className = $stmt->name->toString();
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foreach ($stmt->stmts as $classStmt) {
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$cond = handlePreprocessorConditions($conds, $classStmt);
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if ($classStmt instanceof Stmt\Nop) {
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continue;
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}
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if (!$classStmt instanceof Stmt\ClassMethod) {
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throw new Exception("Not implemented {$classStmt->getType()}");
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}
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$funcInfos[] = parseFunctionLike(
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$classStmt->name->toString(), $className, $classStmt, $cond);
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}
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continue;
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}
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throw new Exception("Unexpected node {$stmt->getType()}");
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}
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return new FileInfo($funcInfos, $generateFunctionEntries);
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}
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function funcInfoToCode(FuncInfo $funcInfo): string {
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$code = '';
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$returnType = $funcInfo->return->type;
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if ($returnType !== null) {
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if (null !== $simpleReturnType = $returnType->tryToSimpleType()) {
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if ($simpleReturnType->isBuiltin) {
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$code .= sprintf(
|
|
"ZEND_BEGIN_ARG_WITH_RETURN_TYPE_INFO_EX(%s, %d, %d, %s, %d)\n",
|
|
$funcInfo->getArgInfoName(), $funcInfo->return->byRef,
|
|
$funcInfo->numRequiredArgs,
|
|
$simpleReturnType->toTypeCode(), $returnType->isNullable()
|
|
);
|
|
} else {
|
|
$code .= sprintf(
|
|
"ZEND_BEGIN_ARG_WITH_RETURN_OBJ_INFO_EX(%s, %d, %d, %s, %d)\n",
|
|
$funcInfo->getArgInfoName(), $funcInfo->return->byRef,
|
|
$funcInfo->numRequiredArgs,
|
|
$simpleReturnType->toEscapedName(), $returnType->isNullable()
|
|
);
|
|
}
|
|
} else if (null !== $representableType = $returnType->tryToRepresentableType()) {
|
|
if ($representableType->classType !== null) {
|
|
$code .= sprintf(
|
|
"ZEND_BEGIN_ARG_WITH_RETURN_OBJ_TYPE_MASK_EX(%s, %d, %d, %s, %s)\n",
|
|
$funcInfo->getArgInfoName(), $funcInfo->return->byRef,
|
|
$funcInfo->numRequiredArgs,
|
|
$representableType->classType->toEscapedName(), $representableType->toTypeMask()
|
|
);
|
|
} else {
|
|
$code .= sprintf(
|
|
"ZEND_BEGIN_ARG_WITH_RETURN_TYPE_MASK_EX(%s, %d, %d, %s)\n",
|
|
$funcInfo->getArgInfoName(), $funcInfo->return->byRef,
|
|
$funcInfo->numRequiredArgs,
|
|
$representableType->toTypeMask()
|
|
);
|
|
}
|
|
} else {
|
|
throw new Exception('Unimplemented');
|
|
}
|
|
} else {
|
|
$code .= sprintf(
|
|
"ZEND_BEGIN_ARG_INFO_EX(%s, 0, %d, %d)\n",
|
|
$funcInfo->getArgInfoName(), $funcInfo->return->byRef, $funcInfo->numRequiredArgs
|
|
);
|
|
}
|
|
|
|
foreach ($funcInfo->args as $argInfo) {
|
|
$argKind = $argInfo->isVariadic ? "ARG_VARIADIC" : "ARG";
|
|
$argType = $argInfo->type;
|
|
if ($argType !== null) {
|
|
if (null !== $simpleArgType = $argType->tryToSimpleType()) {
|
|
if ($simpleArgType->isBuiltin) {
|
|
$code .= sprintf(
|
|
"\tZEND_%s_TYPE_INFO(%s, %s, %s, %d)\n",
|
|
$argKind, $argInfo->getSendByString(), $argInfo->name,
|
|
$simpleArgType->toTypeCode(), $argType->isNullable()
|
|
);
|
|
} else {
|
|
$code .= sprintf(
|
|
"\tZEND_%s_OBJ_INFO(%s, %s, %s, %d)\n",
|
|
$argKind, $argInfo->getSendByString(), $argInfo->name,
|
|
$simpleArgType->toEscapedName(), $argType->isNullable()
|
|
);
|
|
}
|
|
} else if (null !== $representableType = $argType->tryToRepresentableType()) {
|
|
if ($representableType->classType !== null) {
|
|
throw new Exception('Unimplemented');
|
|
}
|
|
$code .= sprintf(
|
|
"\tZEND_%s_TYPE_MASK(%s, %s, %s)\n",
|
|
$argKind, $argInfo->getSendByString(), $argInfo->name,
|
|
$representableType->toTypeMask()
|
|
);
|
|
} else {
|
|
throw new Exception('Unimplemented');
|
|
}
|
|
} else {
|
|
$code .= sprintf(
|
|
"\tZEND_%s_INFO(%s, %s)\n", $argKind, $argInfo->getSendByString(), $argInfo->name);
|
|
}
|
|
}
|
|
|
|
$code .= "ZEND_END_ARG_INFO()";
|
|
return $code . "\n";
|
|
}
|
|
|
|
function findEquivalentFuncInfo(array $generatedFuncInfos, $funcInfo): ?FuncInfo {
|
|
foreach ($generatedFuncInfos as $generatedFuncInfo) {
|
|
if ($generatedFuncInfo->equalsApartFromName($funcInfo)) {
|
|
return $generatedFuncInfo;
|
|
}
|
|
}
|
|
return null;
|
|
}
|
|
|
|
function generateCodeWithConditions(
|
|
FileInfo $fileInfo, string $separator, Closure $codeGenerator): string {
|
|
$code = "";
|
|
foreach ($fileInfo->funcInfos as $funcInfo) {
|
|
$funcCode = $codeGenerator($funcInfo);
|
|
if ($funcCode === null) {
|
|
continue;
|
|
}
|
|
|
|
$code .= $separator;
|
|
if ($funcInfo->cond) {
|
|
$code .= "#if {$funcInfo->cond}\n";
|
|
$code .= $funcCode;
|
|
$code .= "#endif\n";
|
|
} else {
|
|
$code .= $funcCode;
|
|
}
|
|
}
|
|
return $code;
|
|
}
|
|
|
|
function generateArgInfoCode(FileInfo $fileInfo): string {
|
|
$funcInfos = $fileInfo->funcInfos;
|
|
|
|
$code = "/* This is a generated file, edit the .stub.php file instead. */\n";
|
|
$generatedFuncInfos = [];
|
|
$code .= generateCodeWithConditions(
|
|
$fileInfo, "\n",
|
|
function(FuncInfo $funcInfo) use(&$generatedFuncInfos) {
|
|
/* If there already is an equivalent arginfo structure, only emit a #define */
|
|
if ($generatedFuncInfo = findEquivalentFuncInfo($generatedFuncInfos, $funcInfo)) {
|
|
$code = sprintf(
|
|
"#define %s %s\n",
|
|
$funcInfo->getArgInfoName(), $generatedFuncInfo->getArgInfoName()
|
|
);
|
|
} else {
|
|
$code = funcInfoToCode($funcInfo);
|
|
}
|
|
|
|
$generatedFuncInfos[] = $funcInfo;
|
|
return $code;
|
|
}
|
|
);
|
|
|
|
if ($fileInfo->generateFunctionEntries) {
|
|
$code .= "\n\n";
|
|
$code .= generateCodeWithConditions($fileInfo, "", function(FuncInfo $funcInfo) {
|
|
if ($funcInfo->className || $funcInfo->alias) {
|
|
return null;
|
|
}
|
|
|
|
return "ZEND_FUNCTION($funcInfo->name);\n";
|
|
});
|
|
|
|
$code .= "\n\nstatic const zend_function_entry ext_functions[] = {\n";
|
|
$code .= generateCodeWithConditions($fileInfo, "", function(FuncInfo $funcInfo) {
|
|
if ($funcInfo->className) {
|
|
return null;
|
|
}
|
|
|
|
if ($funcInfo->alias) {
|
|
return sprintf(
|
|
"\tZEND_FALIAS(%s, %s, %s)\n",
|
|
$funcInfo->name, $funcInfo->alias, $funcInfo->getArgInfoName()
|
|
);
|
|
} else {
|
|
return sprintf("\tZEND_FE(%s, %s)\n", $funcInfo->name, $funcInfo->getArgInfoName());
|
|
}
|
|
});
|
|
$code .= "\tZEND_FE_END\n";
|
|
$code .= "};\n";
|
|
}
|
|
|
|
return $code;
|
|
}
|
|
|
|
function initPhpParser() {
|
|
$version = "4.3.0";
|
|
$phpParserDir = __DIR__ . "/PHP-Parser-$version";
|
|
if (!is_dir($phpParserDir)) {
|
|
$cwd = getcwd();
|
|
chdir(__DIR__);
|
|
|
|
passthru("wget https://github.com/nikic/PHP-Parser/archive/v$version.tar.gz", $exit);
|
|
if ($exit !== 0) {
|
|
passthru("curl -LO https://github.com/nikic/PHP-Parser/archive/v$version.tar.gz", $exit);
|
|
}
|
|
if ($exit !== 0) {
|
|
throw new Exception("Failed to download PHP-Parser tarball");
|
|
}
|
|
if (!mkdir($phpParserDir)) {
|
|
throw new Exception("Failed to create directory $phpParserDir");
|
|
}
|
|
passthru("tar xvzf v$version.tar.gz -C PHP-Parser-$version --strip-components 1", $exit);
|
|
if ($exit !== 0) {
|
|
throw new Exception("Failed to extract PHP-Parser tarball");
|
|
}
|
|
unlink(__DIR__ . "/v$version.tar.gz");
|
|
chdir($cwd);
|
|
}
|
|
|
|
spl_autoload_register(function(string $class) use($phpParserDir) {
|
|
if (strpos($class, "PhpParser\\") === 0) {
|
|
$fileName = $phpParserDir . "/lib/" . str_replace("\\", "/", $class) . ".php";
|
|
require $fileName;
|
|
}
|
|
});
|
|
}
|