forked from runkit7/runkit7
/
runkit_zend_execute_API.c
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/
runkit_zend_execute_API.c
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#include "php_runkit_zend_execute_API.h"
#include "main/php_version.h"
#include "Zend/zend_API.h"
#include "Zend/zend_compile.h"
#include "Zend/zend_exceptions.h"
#include "Zend/zend_generators.h"
#include "Zend/zend_globals_macros.h"
#include "Zend/zend_types.h"
#ifndef GC_ADDREF
#define GC_ADDREF(x) GC_REFCOUNT((x))++
#endif
#if PHP_VERSION_ID >= 70300
#define RUNKIT_IS_FCI_CACHE_INITIALIZED(fci_cache) ((fci_cache)->function_handler != NULL)
#define RUNKIT_CLEAR_FCI_CACHE(fci_cache) do {(fci_cache)->function_handler = NULL; } while (0)
#else
#define RUNKIT_IS_FCI_CACHE_INITIALIZED(fci_cache) ((fci_cache)->initialized)
#define RUNKIT_CLEAR_FCI_CACHE(fci_cache) do {(fci_cache)->initialized = 0; } while (0)
#endif
#if PHP_VERSION_ID >= 80200
#define IS_CALLABLE_CHECK_SILENT 0
#endif
/**
* Copies of internal methods from Zend/zend_execute_API.c
* These are used to call internal methods (not in the function table) from the external method.
* TODO: See if xdebug works
*
* FIXME: Update the signature and implementation to also support named parameters
*/
int runkit_forward_call_user_function(zend_function *fbc, zend_function *fbc_inner, INTERNAL_FUNCTION_PARAMETERS) /* {{{ */
{
uint32_t i;
zend_execute_data *call, dummy_execute_data;
zend_fcall_info_cache fci_cache_local = {0};
zend_function *func;
#if PHP_VERSION_ID >= 70400
uint32_t call_info;
void *object_or_called_scope;
#endif
/* {{{ patch for runkit */
zend_fcall_info fci = {0};
zend_fcall_info_cache *fci_cache = NULL;
fci.size = sizeof(fci);
fci.object = NULL; // FIXME for methods? // object ? Z_OBJ_P(object) : NULL;
ZVAL_STR(&fci.function_name, fbc_inner->common.function_name);
zend_string_addref(fbc_inner->common.function_name);
fci.retval = return_value;
fci.param_count = ZEND_CALL_NUM_ARGS(EG(current_execute_data));
fci.params = ZEND_CALL_ARG(EG(current_execute_data), 1); // params and param_count From zend_API.c
#if PHP_VERSION_ID < 80000
fci.no_separation = (zend_bool)1; // ???
#endif
/* end patch for runkit }}} */
ZVAL_UNDEF(fci.retval);
if (!EG(active)) {
return FAILURE; /* executor is already inactive */
}
if (EG(exception)) {
return FAILURE; /* we would result in an unstable executor otherwise */
}
/* Initialize execute_data */
if (!EG(current_execute_data)) {
/* This only happens when we're called outside any execute()'s
* It shouldn't be strictly necessary to NULL execute_data out,
* but it may make bugs easier to spot
*/
memset(&dummy_execute_data, 0, sizeof(zend_execute_data));
EG(current_execute_data) = &dummy_execute_data;
} else if (EG(current_execute_data)->func &&
ZEND_USER_CODE(EG(current_execute_data)->func->common.type) &&
EG(current_execute_data)->opline->opcode != ZEND_DO_FCALL &&
EG(current_execute_data)->opline->opcode != ZEND_DO_ICALL &&
EG(current_execute_data)->opline->opcode != ZEND_DO_UCALL &&
EG(current_execute_data)->opline->opcode != ZEND_DO_FCALL_BY_NAME) {
/* Insert fake frame in case of include or magic calls */
dummy_execute_data = *EG(current_execute_data);
dummy_execute_data.prev_execute_data = EG(current_execute_data);
dummy_execute_data.call = NULL;
dummy_execute_data.opline = NULL;
dummy_execute_data.func = NULL;
EG(current_execute_data) = &dummy_execute_data;
}
if (!fci_cache || !RUNKIT_IS_FCI_CACHE_INITIALIZED(fci_cache)) {
zend_string *callable_name;
char *error = NULL;
if (!fci_cache) {
fci_cache = &fci_cache_local;
}
if (!zend_is_callable_ex(&fci.function_name, fci.object, IS_CALLABLE_CHECK_SILENT, &callable_name, fci_cache, &error)) {
if (error) {
zend_error(E_WARNING, "Invalid callback %s, %s", ZSTR_VAL(callable_name), error);
efree(error);
}
if (callable_name) {
zend_string_release(callable_name);
}
if (EG(current_execute_data) == &dummy_execute_data) {
EG(current_execute_data) = dummy_execute_data.prev_execute_data;
}
return FAILURE;
} else if (error) {
/* Capitalize the first letter of the error message */
if (error[0] >= 'a' && error[0] <= 'z') {
error[0] += ('A' - 'a');
}
zend_error(E_DEPRECATED, "%s", error);
efree(error);
}
zend_string_release(callable_name);
}
func = fbc_inner;
// fprintf(stderr, "func=%p func->type=%d\n", func, func->type);
#if PHP_VERSION_ID < 70400
fci.object = (func->common.fn_flags & ZEND_ACC_STATIC) ?
NULL : fci_cache->object;
call = zend_vm_stack_push_call_frame(ZEND_CALL_TOP_FUNCTION | ZEND_CALL_DYNAMIC,
func, fci.param_count, fci_cache->called_scope, fci.object);
#else
if ((func->common.fn_flags & ZEND_ACC_STATIC) || !fci_cache->object) {
fci.object = NULL;
object_or_called_scope = fci_cache->called_scope;
call_info = ZEND_CALL_TOP_FUNCTION | ZEND_CALL_DYNAMIC;
} else {
fci.object = fci_cache->object;
object_or_called_scope = fci.object;
call_info = ZEND_CALL_TOP_FUNCTION | ZEND_CALL_DYNAMIC | ZEND_CALL_HAS_THIS;
}
call = zend_vm_stack_push_call_frame(call_info,
func, fci.param_count, object_or_called_scope);
#endif
if (fci.object &&
(!EG(objects_store).object_buckets ||
!IS_OBJ_VALID(EG(objects_store).object_buckets[fci.object->handle]))) {
if (EG(current_execute_data) == &dummy_execute_data) {
EG(current_execute_data) = dummy_execute_data.prev_execute_data;
}
return FAILURE;
}
if (func->common.fn_flags & (ZEND_ACC_ABSTRACT | ZEND_ACC_DEPRECATED)) {
if (func->common.fn_flags & ZEND_ACC_ABSTRACT) {
zend_throw_error(NULL, "Cannot call abstract method %s::%s()", ZSTR_VAL(func->common.scope->name), ZSTR_VAL(func->common.function_name));
if (EG(current_execute_data) == &dummy_execute_data) {
EG(current_execute_data) = dummy_execute_data.prev_execute_data;
}
return FAILURE;
}
if (func->common.fn_flags & ZEND_ACC_DEPRECATED) {
zend_error(E_DEPRECATED, "Function %s%s%s() is deprecated",
func->common.scope ? ZSTR_VAL(func->common.scope->name) : "",
func->common.scope ? "::" : "",
ZSTR_VAL(func->common.function_name));
}
}
// fprintf(stderr, "func=%p func->type=%d\n", func, func->type);
for (i = 0; i < fci.param_count; i++) {
zval *param;
zval *arg = &fci.params[i];
if (ARG_SHOULD_BE_SENT_BY_REF(func, i + 1)) {
if (UNEXPECTED(!Z_ISREF_P(arg))) {
#if PHP_VERSION_ID < 80000
if (!fci.no_separation) {
/* Separation is enabled -- create a ref */
ZVAL_NEW_REF(arg, arg);
} else if (!ARG_MAY_BE_SENT_BY_REF(func, i + 1))
#endif
{
/* By-value send is not allowed -- emit a warning,
* but still perform the call with a by-value send. */
zend_error(E_WARNING,
"Parameter %d to %s%s%s() expected to be a reference, value given", i + 1,
func->common.scope ? ZSTR_VAL(func->common.scope->name) : "",
func->common.scope ? "::" : "",
ZSTR_VAL(func->common.function_name));
}
}
} else {
if (Z_ISREF_P(arg) &&
!(func->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE)) {
/* don't separate references for __call */
arg = Z_REFVAL_P(arg);
}
}
param = ZEND_CALL_ARG(call, i + 1);
ZVAL_COPY(param, arg);
}
//fprintf(stderr, "func=%p func->type=%d\n", func, func->type);
if (UNEXPECTED(func->op_array.fn_flags & ZEND_ACC_CLOSURE)) {
#if PHP_VERSION_ID >= 80000
#define ZEND_CLOSURE_OBJECT(op_array) \
((zend_object*)((char*)(op_array) - sizeof(zend_object)))
/*
uint32_t call_info;
// This GC_ADDREF ends up modifying func->op_array.prototype for some reason
// GC_ADDREF((zend_object *)func->op_array.prototype);
call_info = ZEND_CALL_CLOSURE;
if (func->common.fn_flags & ZEND_ACC_FAKE_CLOSURE) {
call_info |= ZEND_CALL_FAKE_CLOSURE;
}
ZEND_ADD_CALL_FLAG(call, call_info);
*/
#else
ZEND_ASSERT(GC_TYPE((zend_object *)func->op_array.prototype) == IS_OBJECT);
GC_ADDREF((zend_object *)func->op_array.prototype);
ZEND_ADD_CALL_FLAG(call, ZEND_CALL_CLOSURE);
#endif
}
// fprintf(stderr, "after closure handling func=%p func->type=%d\n", func, func->type);
if (func->type == ZEND_USER_FUNCTION) {
int call_via_handler = (func->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE) != 0;
zend_init_execute_data(call, &func->op_array, fci.retval);
zend_execute_ex(call);
if (call_via_handler) {
/* We must re-initialize function again */
RUNKIT_CLEAR_FCI_CACHE(fci_cache);
}
} else if (func->type == ZEND_INTERNAL_FUNCTION) {
int call_via_handler = (func->common.fn_flags & ZEND_ACC_CALL_VIA_TRAMPOLINE) != 0;
ZVAL_NULL(fci.retval);
call->prev_execute_data = EG(current_execute_data);
call->return_value = NULL; /* this is not a constructor call */
EG(current_execute_data) = call;
if (EXPECTED(zend_execute_internal == NULL)) {
/* saves one function call if zend_execute_internal is not used */
func->internal_function.handler(call, fci.retval);
} else {
zend_execute_internal(call, fci.retval);
}
EG(current_execute_data) = call->prev_execute_data;
zend_vm_stack_free_args(call);
/* We shouldn't fix bad extensions here,
because it can break proper ones (Bug #34045)
if (!EX(function_state).function->common.return_reference)
{
INIT_PZVAL(f->retval);
}*/
if (EG(exception)) {
zval_ptr_dtor(fci.retval);
ZVAL_UNDEF(fci.retval);
}
if (call_via_handler) {
/* We must re-initialize function again */
RUNKIT_CLEAR_FCI_CACHE(fci_cache);
}
} else { /* ZEND_OVERLOADED_FUNCTION */
#if PHP_VERSION_ID < 70400
ZVAL_NULL(fci.retval);
/* Not sure what should be done here if it's a static method */
if (fci.object) {
call->prev_execute_data = EG(current_execute_data);
EG(current_execute_data) = call;
fci.object->handlers->call_method(func->common.function_name, fci.object, call, fci.retval);
EG(current_execute_data) = call->prev_execute_data;
} else {
zend_throw_error(NULL, "Cannot call overloaded function for non-object");
}
zend_vm_stack_free_args(call);
if (func->type == ZEND_OVERLOADED_FUNCTION_TEMPORARY) {
zend_string_release(func->common.function_name);
}
efree(func);
if (EG(exception)) {
zval_ptr_dtor(fci.retval);
ZVAL_UNDEF(fci.retval);
}
#else
// fprintf(stderr, "func->type=%d\n", (int)func->type);
// php 7.4 got rid of ZEND_OVERLOADED_FUNCTION
ZEND_ASSERT(func->type == ZEND_INTERNAL_FUNCTION);
#endif
}
zend_vm_stack_free_call_frame(call);
if (EG(current_execute_data) == &dummy_execute_data) {
EG(current_execute_data) = dummy_execute_data.prev_execute_data;
}
if (EG(exception)) {
zend_throw_exception_internal(NULL);
}
return SUCCESS;
}