Also clear the stat cache in the forked child

Author: lazerg

ext/pcntl/pcntl.c

@@ -29,6 +29,7 @@
 
 #include "php.h"
 #include "ext/standard/info.h"
+#include "ext/standard/php_filestat.h"
 #include "php_signal.h"
 #include "php_ticks.h"
 #include "zend_exceptions.h"
@@ -294,7 +295,7 @@ PHP_FUNCTION(pcntl_fork)
 		}
 	} else if (id == 0) {
 		zend_max_execution_timer_init();
-		realpath_cache_clean();
+		php_clear_stat_cache(true, NULL, 0);
 	}
 
 	RETURN_LONG((zend_long) id);
@@ -1574,7 +1575,7 @@ PHP_FUNCTION(pcntl_rfork)
 		}
 	} else if (pid == 0) {
 		zend_max_execution_timer_init();
-		realpath_cache_clean();
+		php_clear_stat_cache(true, NULL, 0);
 	}
 
 	RETURN_LONG((zend_long) pid);
@@ -1620,7 +1621,7 @@ PHP_FUNCTION(pcntl_forkx)
 		}
 	} else if (pid == 0) {
 		zend_max_execution_timer_init();
-		realpath_cache_clean();
+		php_clear_stat_cache(true, NULL, 0);
 	}
 
 	RETURN_LONG((zend_long) pid);

ext/pcntl/tests/gh23986.phpt

@@ -13,9 +13,11 @@ function proc_self_pid() {
 }
 
 var_dump(proc_self_pid() === getmypid());
+$parent_inode = fileinode('/proc/self');
 
 $pid = pcntl_fork();
 if ($pid === 0) {
+    var_dump(fileinode('/proc/self') !== $parent_inode);
     var_dump(proc_self_pid() === getmypid());
     exit(0);
 }
@@ -24,3 +26,4 @@ pcntl_waitpid($pid, $status);
 --EXPECT--
 bool(true)
 bool(true)
+bool(true)