Remote heap spraying / feng chui protection

Isolate request environment / input in separate chunks to makes it more
difficult to remotely control the layout of the heap.

Author: arnaud-lb

Zend/tests/bug70258.phpt

@@ -1,7 +1,7 @@
 --TEST--
 Bug #70258 (Segfault if do_resize fails to allocated memory)
 --INI--
-memory_limit=2M
+memory_limit=4M
 --SKIPIF--
 <?php
 $zend_mm_enabled = getenv("USE_ZEND_ALLOC");
@@ -25,4 +25,4 @@ $a = new A;
 $a->core();
 ?>
 --EXPECTF--
-Fatal error: Allowed memory size of 2097152 bytes exhausted%s(tried to allocate %d bytes) in %s on line %d
+Fatal error: Allowed memory size of 4194304 bytes exhausted%s(tried to allocate %d bytes) in %s on line %d

Zend/tests/fibers/out-of-memory-in-fiber.phpt

@@ -1,7 +1,7 @@
 --TEST--
 Out of Memory in a fiber
 --INI--
-memory_limit=2M
+memory_limit=4M
 --SKIPIF--
 <?php
 if (getenv("USE_ZEND_ALLOC") === "0") {

Zend/tests/fibers/out-of-memory-in-nested-fiber.phpt

@@ -1,7 +1,7 @@
 --TEST--
 Out of Memory in a nested fiber
 --INI--
-memory_limit=2M
+memory_limit=4M
 --SKIPIF--
 <?php
 if (getenv("USE_ZEND_ALLOC") === "0") {

Zend/tests/fibers/out-of-memory-in-recursive-fiber.phpt

@@ -1,7 +1,7 @@
 --TEST--
 Out of Memory from recursive fiber creation
 --INI--
-memory_limit=2M
+memory_limit=4M
 --SKIPIF--
 <?php
 if (getenv("USE_ZEND_ALLOC") === "0") {

Zend/tests/gh11189.phpt

@@ -5,7 +5,7 @@ GH-11189: Exceeding memory limit in zend_hash_do_resize leaves the array in an i
 if (getenv("USE_ZEND_ALLOC") === "0") die("skip ZMM is disabled");
 ?>
 --INI--
-memory_limit=2M
+memory_limit=4M
 --FILE--
 <?php
 

Zend/tests/gh11189_1.phpt

@@ -5,7 +5,7 @@ GH-11189: Exceeding memory limit in zend_hash_do_resize leaves the array in an i
 if (getenv("USE_ZEND_ALLOC") === "0") die("skip ZMM is disabled");
 ?>
 --INI--
-memory_limit=2M
+memory_limit=4M
 --FILE--
 <?php
 

Zend/tests/gh12073.phpt

@@ -16,7 +16,7 @@ function test() {
 	};
 }
 
-ini_set('memory_limit', '2M');
+ini_set('memory_limit', '4M');
 
 $array = [];
 for ($i = 0; $i < 10_000; $i++) {

Zend/tests/new_oom.inc

@@ -1,6 +1,6 @@
 <?php
 
-$mb_used = (int) ceil(memory_get_usage() / (1024 ** 2));
+$mb_used = (int) ceil(memory_get_usage(true) / (1024 ** 2));
 ini_set('memory_limit', ($mb_used + 1) . 'M');
 
 $class = $argv[1];

Zend/tests/object_gc_in_shutdown.phpt

@@ -2,9 +2,9 @@
 Bug object gc not working in shutdown
 --FILE--
 <?php
-ini_set('memory_limit', '2M');
+ini_set('memory_limit', '4M');
 register_shutdown_function(function () {
-    for ($n = 1000 * 1000; $n--;) {
+    for ($n = 2 * 1000 * 1000; $n--;) {
         new stdClass;
     }
     echo "OK\n";