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Fix GH-18898: SEGV zend_jit_op_array_hot with property hooks and preloading #18923

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Fix GH-18898: SEGV zend_jit_op_array_hot with property hooks and preloading #18923

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31 changes: 25 additions & 6 deletions ext/opcache/jit/zend_jit.c
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Original file line number Diff line number Diff line change
Expand Up @@ -3216,6 +3216,17 @@ int zend_jit_op_array(zend_op_array *op_array, zend_script *script)
return FAILURE;
}

static void zend_jit_link_func_info(zend_op_array *op_array)
{
if (!ZEND_FUNC_INFO(op_array)) {
void *jit_extension = zend_shared_alloc_get_xlat_entry(op_array->opcodes);

if (jit_extension) {
ZEND_SET_FUNC_INFO(op_array, jit_extension);
}
}
}

int zend_jit_script(zend_script *script)
{
void *checkpoint;
Expand Down Expand Up @@ -3303,6 +3314,7 @@ int zend_jit_script(zend_script *script)
zend_class_entry *ce;
zend_op_array *op_array;
zval *zv;
zend_property_info *prop;

ZEND_HASH_MAP_FOREACH_VAL(&script->class_table, zv) {
if (Z_TYPE_P(zv) == IS_ALIAS_PTR) {
Expand All @@ -3313,14 +3325,21 @@ int zend_jit_script(zend_script *script)
ZEND_ASSERT(ce->type == ZEND_USER_CLASS);

ZEND_HASH_MAP_FOREACH_PTR(&ce->function_table, op_array) {
if (!ZEND_FUNC_INFO(op_array)) {
void *jit_extension = zend_shared_alloc_get_xlat_entry(op_array->opcodes);
zend_jit_link_func_info(op_array);
} ZEND_HASH_FOREACH_END();

if (jit_extension) {
ZEND_SET_FUNC_INFO(op_array, jit_extension);
if (ce->num_hooked_props > 0) {
ZEND_HASH_MAP_FOREACH_PTR(&ce->properties_info, prop) {
if (prop->hooks) {
for (uint32_t i = 0; i < ZEND_PROPERTY_HOOK_COUNT; i++) {
if (prop->hooks[i]) {
op_array = &prop->hooks[i]->op_array;
zend_jit_link_func_info(op_array);
}
}
}
}
} ZEND_HASH_FOREACH_END();
} ZEND_HASH_FOREACH_END();
}
} ZEND_HASH_FOREACH_END();
}

Expand Down
23 changes: 23 additions & 0 deletions ext/opcache/tests/jit/gh18898_1.phpt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,23 @@
--TEST--
GH-18898 (SEGV zend_jit_op_array_hot with property hooks and preloading) - jit 1235
--INI--
opcache.enable=1
opcache.enable_cli=1
opcache.jit=1235
opcache.jit_buffer_size=16M
opcache.preload={PWD}/../gh18534_preload.inc
--EXTENSIONS--
opcache
--SKIPIF--
<?php
if (PHP_OS_FAMILY == 'Windows') die('skip Preloading is not supported on Windows');
?>
--FILE--
<?php
$test = new DummyModel;
var_dump($test->dummyProperty2);
echo "ok";
?>
--EXPECT--
NULL
ok
23 changes: 23 additions & 0 deletions ext/opcache/tests/jit/gh18898_2.phpt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,23 @@
--TEST--
GH-18898 (SEGV zend_jit_op_array_hot with property hooks and preloading) - jit 1233
--INI--
opcache.enable=1
opcache.enable_cli=1
opcache.jit=1233
opcache.jit_buffer_size=16M
opcache.preload={PWD}/../gh18534_preload.inc
--EXTENSIONS--
opcache
--SKIPIF--
<?php
if (PHP_OS_FAMILY == 'Windows') die('skip Preloading is not supported on Windows');
?>
--FILE--
<?php
$test = new DummyModel;
var_dump($test->dummyProperty2);
echo "ok";
?>
--EXPECT--
NULL
ok
83 changes: 60 additions & 23 deletions ext/opcache/zend_persist.c
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Original file line number Diff line number Diff line change
Expand Up @@ -1262,6 +1262,39 @@ void zend_update_parent_ce(zend_class_entry *ce)
}
}

static void zend_accel_persist_jit_op_array(zend_op_array *op_array, zend_class_entry *ce)
{
if (op_array->type == ZEND_USER_FUNCTION) {
if (op_array->scope == ce
&& !(op_array->fn_flags & ZEND_ACC_ABSTRACT)
&& !(op_array->fn_flags & ZEND_ACC_TRAIT_CLONE)) {
zend_jit_op_array(op_array, ZCG(current_persistent_script) ? &ZCG(current_persistent_script)->script : NULL);
for (uint32_t i = 0; i < op_array->num_dynamic_func_defs; i++) {
zend_jit_op_array(op_array->dynamic_func_defs[i], ZCG(current_persistent_script) ? &ZCG(current_persistent_script)->script : NULL);
}
}
}
}

static void zend_accel_persist_link_func_info(zend_op_array *op_array, zend_class_entry *ce)
{
if (op_array->type == ZEND_USER_FUNCTION
&& !(op_array->fn_flags & ZEND_ACC_ABSTRACT)) {
if ((op_array->scope != ce
|| (op_array->fn_flags & ZEND_ACC_TRAIT_CLONE))
&& (JIT_G(trigger) == ZEND_JIT_ON_FIRST_EXEC
|| JIT_G(trigger) == ZEND_JIT_ON_PROF_REQUEST
|| JIT_G(trigger) == ZEND_JIT_ON_HOT_COUNTERS
|| JIT_G(trigger) == ZEND_JIT_ON_HOT_TRACE)) {
void *jit_extension = zend_shared_alloc_get_xlat_entry(op_array->opcodes);

if (jit_extension) {
ZEND_SET_FUNC_INFO(op_array, jit_extension);
}
}
}
}

static void zend_accel_persist_class_table(HashTable *class_table)
{
Bucket *p;
Expand All @@ -1288,44 +1321,48 @@ static void zend_accel_persist_class_table(HashTable *class_table)
if (JIT_G(on) && JIT_G(opt_level) <= ZEND_JIT_LEVEL_OPT_FUNCS &&
!ZCG(current_persistent_script)->corrupted) {
zend_op_array *op_array;
zend_property_info *prop;

ZEND_HASH_MAP_FOREACH_BUCKET(class_table, p) {
if (EXPECTED(Z_TYPE(p->val) != IS_ALIAS_PTR)) {
ce = Z_PTR(p->val);
ZEND_HASH_MAP_FOREACH_PTR(&ce->function_table, op_array) {
if (op_array->type == ZEND_USER_FUNCTION) {
if (op_array->scope == ce
&& !(op_array->fn_flags & ZEND_ACC_ABSTRACT)
&& !(op_array->fn_flags & ZEND_ACC_TRAIT_CLONE)) {
zend_jit_op_array(op_array, ZCG(current_persistent_script) ? &ZCG(current_persistent_script)->script : NULL);
for (uint32_t i = 0; i < op_array->num_dynamic_func_defs; i++) {
zend_jit_op_array(op_array->dynamic_func_defs[i], ZCG(current_persistent_script) ? &ZCG(current_persistent_script)->script : NULL);
zend_accel_persist_jit_op_array(op_array, ce);
} ZEND_HASH_FOREACH_END();

if (ce->num_hooked_props > 0) {
ZEND_HASH_MAP_FOREACH_PTR(&ce->properties_info, prop) {
if (prop->hooks) {
for (uint32_t i = 0; i < ZEND_PROPERTY_HOOK_COUNT; i++) {
if (prop->hooks[i]) {
op_array = &prop->hooks[i]->op_array;
zend_accel_persist_jit_op_array(op_array, ce);
}
}
}
}
} ZEND_HASH_FOREACH_END();
} ZEND_HASH_FOREACH_END();
}
}
} ZEND_HASH_FOREACH_END();
ZEND_HASH_MAP_FOREACH_BUCKET(class_table, p) {
if (EXPECTED(Z_TYPE(p->val) != IS_ALIAS_PTR)) {
ce = Z_PTR(p->val);
ZEND_HASH_MAP_FOREACH_PTR(&ce->function_table, op_array) {
if (op_array->type == ZEND_USER_FUNCTION
&& !(op_array->fn_flags & ZEND_ACC_ABSTRACT)) {
if ((op_array->scope != ce
|| (op_array->fn_flags & ZEND_ACC_TRAIT_CLONE))
&& (JIT_G(trigger) == ZEND_JIT_ON_FIRST_EXEC
|| JIT_G(trigger) == ZEND_JIT_ON_PROF_REQUEST
|| JIT_G(trigger) == ZEND_JIT_ON_HOT_COUNTERS
|| JIT_G(trigger) == ZEND_JIT_ON_HOT_TRACE)) {
void *jit_extension = zend_shared_alloc_get_xlat_entry(op_array->opcodes);

if (jit_extension) {
ZEND_SET_FUNC_INFO(op_array, jit_extension);
zend_accel_persist_link_func_info(op_array, ce);
} ZEND_HASH_FOREACH_END();

if (ce->num_hooked_props > 0) {
ZEND_HASH_MAP_FOREACH_PTR(&ce->properties_info, prop) {
if (prop->hooks) {
for (uint32_t i = 0; i < ZEND_PROPERTY_HOOK_COUNT; i++) {
if (prop->hooks[i]) {
op_array = &prop->hooks[i]->op_array;
zend_accel_persist_link_func_info(op_array, ce);
}
}
}
}
} ZEND_HASH_FOREACH_END();
} ZEND_HASH_FOREACH_END();
}
}
} ZEND_HASH_FOREACH_END();
}
Expand Down