execute php,php扩展实践zend_execute_ex层获取实参

其实在实现的 php 函数里面是很容易获取到的，参考 php 的 builtin 函数 func_get_args() 就可以知道了。void **p;

int arg_count;

int i;

zend_execute_data *ex = EG(current_execute_data);

if (!ex || !ex->function_state.arguments) {

RETURN_FALSE;

}

p = ex->function_state.arguments;

arg_count = (int)(zend_uintptr_t) *p;

for (i = 0; i < arg_count; i++) {

zval *element, *arg;

arg = *((zval **) (p - (arg_count - i)));

php_var_dump(&arg, 1 TSRMLS_CC);

}

但是在 zend_execute_ex 中，是不能使用 function_state.arguments 来获取参数的，需要从 argument_stack 中获取调用函数的实参。static void (*old_zend_execute_ex) (zend_execute_data *execute_data TSRMLS_DC);

ZEND_API void learn_execute_ex (zend_execute_data *execute_data TSRMLS_DC)

{

php_printf("====== extension debug start ======n");

php_printf("function name: %sn", get_active_function_name(TSRMLS_C));

old_zend_execute_ex(execute_data TSRMLS_CC);

int stacked = 0;

void **top;

void **bottom;

zval *arguments;

smart_str buf = {0};

array_init(arguments);

top = zend_vm_stack_top(TSRMLS_C) - 1;

if (top) {

stacked = (int)(zend_uintptr_t) *top; // argc

if (stacked) {

bottom = zend_vm_stack_top(TSRMLS_C);

EG(argument_stack)->top = top + 1;

if (zend_copy_parameters_array(stacked, arguments TSRMLS_CC) == SUCCESS) {

php_json_encode(&buf, arguments, 0 TSRMLS_CC);

}

EG(argument_stack)->top = bottom;

}

}

smart_str_0(&buf);

php_printf("%sn", buf.c);

smart_str_free(&buf);

zval_dtor(arguments);

php_printf("====== extension debug end ======n");

}

PHP_MINIT_FUNCTION(learn)

{

old_zend_execute_ex = zend_execute_ex;

zend_execute_ex = learn_execute_ex;

return SUCCESS;

}

PHP_MSHUTDOWN_FUNCTION(learn)

{

zend_execute_ex = old_zend_execute_ex;

return SUCCESS;

}

2015-11-04 00:38 更新

后来看到，其实不用上面这中方法就可以实现, php 5.5之后要从 prev 里面去取/**

* php_var_dump defined in this head file.

*/

#include "ext/standard/php_var.h"

zend_execute_data *real_execute_data = execute_data->prev_execute_data;

void **p = real_execute_data->function_state.arguments;

int arg_count = (int) (zend_uintptr_t) * p;

zval *argument_element;

int i;

// zval *obj = real_execute_data->object;

unsigned long start = mach_absolute_time();

for (i = 0; i < arg_count; i++) {

argument_element = *(p - (arg_count - i));

php_var_dump(&argument_element, 1);

}