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Make zend_register_*_constant() functions return pointers, use them #19029

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Make zend_register_*_constant() functions return pointers, use them #19029

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f78fd03
Make `zend_register_*_constant()` functions return pointers, use them
DanielEScherzer Jul 3, 2025
2a0220f
Fix for extensions support PHP < 8.5
DanielEScherzer Jul 4, 2025
c866325
Update build/gen_stub.php
DanielEScherzer Jul 4, 2025
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7 changes: 7 additions & 0 deletions UPGRADING.INTERNALS
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Original file line number Diff line number Diff line change
Expand Up @@ -47,6 +47,13 @@ PHP 8.5 INTERNALS UPGRADE NOTES
did not match its actual behavior.
. zend_register_constant() now returns a pointer to the added constant
on success and NULL on failure instead of SUCCESS/FAILURE.
The same is true for the specialized registration methods
* zend_register_bool_constant()
* zend_register_null_constant()
* zend_register_long_constant()
* zend_register_double_constant()
* zend_register_string_constant()
* zend_register_stringl_constant()

========================
2. Build system changes
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24 changes: 12 additions & 12 deletions Zend/zend_constants.c
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Expand Up @@ -136,62 +136,62 @@ void zend_register_standard_constants(void)
null_const = zend_hash_str_find_ptr(EG(zend_constants), "NULL", sizeof("NULL")-1);
}

ZEND_API void zend_register_null_constant(const char *name, size_t name_len, int flags, int module_number)
ZEND_API zend_constant *zend_register_null_constant(const char *name, size_t name_len, int flags, int module_number)
{
zend_constant c;

ZVAL_NULL(&c.value);
ZEND_CONSTANT_SET_FLAGS(&c, flags, module_number);
c.name = zend_string_init_interned(name, name_len, flags & CONST_PERSISTENT);
zend_register_constant(&c);
return zend_register_constant(&c);
}

ZEND_API void zend_register_bool_constant(const char *name, size_t name_len, bool bval, int flags, int module_number)
ZEND_API zend_constant *zend_register_bool_constant(const char *name, size_t name_len, bool bval, int flags, int module_number)
{
zend_constant c;

ZVAL_BOOL(&c.value, bval);
ZEND_CONSTANT_SET_FLAGS(&c, flags, module_number);
c.name = zend_string_init_interned(name, name_len, flags & CONST_PERSISTENT);
zend_register_constant(&c);
return zend_register_constant(&c);
}

ZEND_API void zend_register_long_constant(const char *name, size_t name_len, zend_long lval, int flags, int module_number)
ZEND_API zend_constant *zend_register_long_constant(const char *name, size_t name_len, zend_long lval, int flags, int module_number)
{
zend_constant c;

ZVAL_LONG(&c.value, lval);
ZEND_CONSTANT_SET_FLAGS(&c, flags, module_number);
c.name = zend_string_init_interned(name, name_len, flags & CONST_PERSISTENT);
zend_register_constant(&c);
return zend_register_constant(&c);
}


ZEND_API void zend_register_double_constant(const char *name, size_t name_len, double dval, int flags, int module_number)
ZEND_API zend_constant *zend_register_double_constant(const char *name, size_t name_len, double dval, int flags, int module_number)
{
zend_constant c;

ZVAL_DOUBLE(&c.value, dval);
ZEND_CONSTANT_SET_FLAGS(&c, flags, module_number);
c.name = zend_string_init_interned(name, name_len, flags & CONST_PERSISTENT);
zend_register_constant(&c);
return zend_register_constant(&c);
}


ZEND_API void zend_register_stringl_constant(const char *name, size_t name_len, const char *strval, size_t strlen, int flags, int module_number)
ZEND_API zend_constant *zend_register_stringl_constant(const char *name, size_t name_len, const char *strval, size_t strlen, int flags, int module_number)
{
zend_constant c;

ZVAL_STR(&c.value, zend_string_init_interned(strval, strlen, flags & CONST_PERSISTENT));
ZEND_CONSTANT_SET_FLAGS(&c, flags, module_number);
c.name = zend_string_init_interned(name, name_len, flags & CONST_PERSISTENT);
zend_register_constant(&c);
return zend_register_constant(&c);
}


ZEND_API void zend_register_string_constant(const char *name, size_t name_len, const char *strval, int flags, int module_number)
ZEND_API zend_constant *zend_register_string_constant(const char *name, size_t name_len, const char *strval, int flags, int module_number)
{
zend_register_stringl_constant(name, name_len, strval, strlen(strval), flags, module_number);
return zend_register_stringl_constant(name, name_len, strval, strlen(strval), flags, module_number);
}

static zend_constant *zend_get_halt_offset_constant(const char *name, size_t name_len)
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12 changes: 6 additions & 6 deletions Zend/zend_constants.h
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Expand Up @@ -91,12 +91,12 @@ ZEND_API zend_constant *zend_get_constant_ptr(zend_string *name);
ZEND_API zval *zend_get_constant_str(const char *name, size_t name_len);
ZEND_API zval *zend_get_constant_ex(zend_string *name, zend_class_entry *scope, uint32_t flags);
ZEND_API zval *zend_get_class_constant_ex(zend_string *class_name, zend_string *constant_name, zend_class_entry *scope, uint32_t flags);
ZEND_API void zend_register_bool_constant(const char *name, size_t name_len, bool bval, int flags, int module_number);
ZEND_API void zend_register_null_constant(const char *name, size_t name_len, int flags, int module_number);
ZEND_API void zend_register_long_constant(const char *name, size_t name_len, zend_long lval, int flags, int module_number);
ZEND_API void zend_register_double_constant(const char *name, size_t name_len, double dval, int flags, int module_number);
ZEND_API void zend_register_string_constant(const char *name, size_t name_len, const char *strval, int flags, int module_number);
ZEND_API void zend_register_stringl_constant(const char *name, size_t name_len, const char *strval, size_t strlen, int flags, int module_number);
ZEND_API zend_constant *zend_register_bool_constant(const char *name, size_t name_len, bool bval, int flags, int module_number);
ZEND_API zend_constant *zend_register_null_constant(const char *name, size_t name_len, int flags, int module_number);
ZEND_API zend_constant *zend_register_long_constant(const char *name, size_t name_len, zend_long lval, int flags, int module_number);
ZEND_API zend_constant *zend_register_double_constant(const char *name, size_t name_len, double dval, int flags, int module_number);
ZEND_API zend_constant *zend_register_string_constant(const char *name, size_t name_len, const char *strval, int flags, int module_number);
ZEND_API zend_constant *zend_register_stringl_constant(const char *name, size_t name_len, const char *strval, size_t strlen, int flags, int module_number);
ZEND_API zend_constant *zend_register_constant(zend_constant *c);
void zend_constant_add_attributes(zend_constant *c, HashTable *attributes);
#ifdef ZTS
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3 changes: 1 addition & 2 deletions Zend/zend_constants_arginfo.h
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34 changes: 25 additions & 9 deletions build/gen_stub.php
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Expand Up @@ -2781,24 +2781,36 @@ private function getGlobalConstDeclaration(EvaluatedValue $value): string
if ($this->isDeprecated) {
$flags .= " | CONST_DEPRECATED";
}

$code = "\t";
if ($this->attributes !== []) {
if ($this->phpVersionIdMinimumCompatibility === null || $this->phpVersionIdMinimumCompatibility >= PHP_85_VERSION_ID) {
// Registration only returns the constant since PHP 8.5, it's
// not worth the bloat to add two different registration blocks
// with conditions for the PHP version
$constVarName = 'const_' . $constName;
$code .= "zend_constant *$constVarName = ";
}
}

if ($value->type->isNull()) {
return "\tREGISTER_NULL_CONSTANT(\"$constName\", $flags);\n";
return $code . "REGISTER_NULL_CONSTANT(\"$constName\", $flags);\n";
}

if ($value->type->isBool()) {
return "\tREGISTER_BOOL_CONSTANT(\"$constName\", " . ($cExpr ?: ($constValue ? "true" : "false")) . ", $flags);\n";
return $code . "REGISTER_BOOL_CONSTANT(\"$constName\", " . ($cExpr ?: ($constValue ? "true" : "false")) . ", $flags);\n";
}

if ($value->type->isInt()) {
return "\tREGISTER_LONG_CONSTANT(\"$constName\", " . ($cExpr ?: (int) $constValue) . ", $flags);\n";
return $code . "REGISTER_LONG_CONSTANT(\"$constName\", " . ($cExpr ?: (int) $constValue) . ", $flags);\n";
}

if ($value->type->isFloat()) {
return "\tREGISTER_DOUBLE_CONSTANT(\"$constName\", " . ($cExpr ?: (float) $constValue) . ", $flags);\n";
return $code . "REGISTER_DOUBLE_CONSTANT(\"$constName\", " . ($cExpr ?: (float) $constValue) . ", $flags);\n";
}

if ($value->type->isString()) {
return "\tREGISTER_STRING_CONSTANT(\"$constName\", " . ($cExpr ?: '"' . addslashes($constValue) . '"') . ", $flags);\n";
return $code . "REGISTER_STRING_CONSTANT(\"$constName\", " . ($cExpr ?: '"' . addslashes($constValue) . '"') . ", $flags);\n";
}

throw new Exception("Unimplemented constant type");
Expand Down Expand Up @@ -5307,12 +5319,11 @@ function generateGlobalConstantAttributeInitialization(
$isConditional = false;
if ($phpVersionIdMinimumCompatibility !== null && $phpVersionIdMinimumCompatibility < PHP_85_VERSION_ID) {
$isConditional = true;
$phpVersionIdMinimumCompatibility = PHP_85_VERSION_ID;
}
$code = generateCodeWithConditions(
$constInfos,
"",
static function (ConstInfo $constInfo) use ($allConstInfos, $phpVersionIdMinimumCompatibility) {
static function (ConstInfo $constInfo) use ($allConstInfos, $isConditional) {
$code = "";

if ($constInfo->attributes === []) {
Expand All @@ -5321,13 +5332,18 @@ static function (ConstInfo $constInfo) use ($allConstInfos, $phpVersionIdMinimum
$constName = str_replace('\\', '\\\\', $constInfo->name->__toString());
$constVarName = 'const_' . $constName;

$code .= "\tzend_constant *$constVarName = zend_hash_str_find_ptr(EG(zend_constants), \"" . $constName . "\", sizeof(\"" . $constName . "\") - 1);\n";
// The entire attribute block will be conditional if PHP < 8.5 is
// supported, but also if PHP < 8.5 is supported we need to search
// for the constant; see GH-19029
if ($isConditional) {
$code .= "\tzend_constant *$constVarName = zend_hash_str_find_ptr(EG(zend_constants), \"" . $constName . "\", sizeof(\"" . $constName . "\") - 1);\n";
}
foreach ($constInfo->attributes as $key => $attribute) {
$code .= $attribute->generateCode(
"zend_add_global_constant_attribute($constVarName",
$constVarName . "_$key",
$allConstInfos,
$phpVersionIdMinimumCompatibility
PHP_85_VERSION_ID
);
}

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3 changes: 1 addition & 2 deletions ext/curl/curl_arginfo.h
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9 changes: 3 additions & 6 deletions ext/date/php_date_arginfo.h
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3 changes: 1 addition & 2 deletions ext/dom/php_dom_arginfo.h
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6 changes: 2 additions & 4 deletions ext/enchant/enchant_arginfo.h
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