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Fetch the function return value in PHP extension C++
I have created an php extension in c++ which tracks the call graph of each request(centos7-64 bit,PHP5.6).And now,I want to get the function return value of each function.
It can be done by using zend_excute_data structure(original_return_value).
zend_execute_data *data;
data = EG(current_execute_data);
if(data->original_return_value)
{
zval *rvalue = *(data->original_return_value); // crashing here
switch (Z_TYPE(argument_element))
{
..
..
..
}
}
Here, while assigning the original_return_value to rvalue,my php extension getting crash.
Is this correct way to do? or anything else.
php php-extension php-internals
asked Nov 20 '18 at 12:29
DuraiDurai
289
add a comment |
I have created an php extension in c++ which tracks the call graph of each request(centos7-64 bit,PHP5.6).And now,I want to get the function return value of each function.
It can be done by using zend_excute_data structure(original_return_value).
zend_execute_data *data;
data = EG(current_execute_data);
if(data->original_return_value)
{
zval *rvalue = *(data->original_return_value); // crashing here
switch (Z_TYPE(argument_element))
{
..
..
..
}
}
Here, while assigning the original_return_value to rvalue,my php extension getting crash.
Is this correct way to do? or anything else.
php php-extension php-internals
asked Nov 20 '18 at 12:29
DuraiDurai
289
I tried with EG(return_value_ptr_ptr) global also,still i didn't get.
– Durai
Nov 23 '18 at 12:42
add a comment |
I have created an php extension in c++ which tracks the call graph of each request(centos7-64 bit,PHP5.6).And now,I want to get the function return value of each function.
It can be done by using zend_excute_data structure(original_return_value).
zend_execute_data *data;
data = EG(current_execute_data);
if(data->original_return_value)
{
zval *rvalue = *(data->original_return_value); // crashing here
switch (Z_TYPE(argument_element))
{
..
..
..
}
}
Here, while assigning the original_return_value to rvalue,my php extension getting crash.
Is this correct way to do? or anything else.
php php-extension php-internals
asked Nov 20 '18 at 12:29
DuraiDurai
289
I have created an php extension in c++ which tracks the call graph of each request(centos7-64 bit,PHP5.6).And now,I want to get the function return value of each function.
It can be done by using zend_excute_data structure(original_return_value).
zend_execute_data *data;
data = EG(current_execute_data);
if(data->original_return_value)
{
zval *rvalue = *(data->original_return_value); // crashing here
switch (Z_TYPE(argument_element))
{
..
..
..
}
}
Here, while assigning the original_return_value to rvalue,my php extension getting crash.
Is this correct way to do? or anything else.
php php-extension php-internals
php php-extension php-internals
asked Nov 20 '18 at 12:29
DuraiDurai
289
asked Nov 20 '18 at 12:29
DuraiDurai
289
edited Nov 23 '18 at 10:31
Durai
asked Nov 20 '18 at 12:29
DuraiDurai
289
asked Nov 20 '18 at 12:29
DuraiDurai
289
asked Nov 20 '18 at 12:29
DuraiDurai
289
289
I tried with EG(return_value_ptr_ptr) global also,still i didn't get.
– Durai
Nov 23 '18 at 12:42
add a comment |
I tried with EG(return_value_ptr_ptr) global also,still i didn't get.
– Durai
Nov 23 '18 at 12:42
I tried with EG(return_value_ptr_ptr) global also,still i didn't get.
– Durai
Nov 23 '18 at 12:42
I tried with EG(return_value_ptr_ptr) global also,still i didn't get.
– Durai
Nov 23 '18 at 12:42
add a comment |
2 Answers
2
active
oldest
votes
zval *rvalue = *(data->original_return_value); // crashing here
Its because of the last deref of original_return_value.
Either the data object or original_return_value is uninitialized or corrupted memory.
answered Nov 20 '18 at 13:34
darunedarune
1,338516
The data object has the value.May be original_return_value points the corrupted memory. Other than this,how can i get the function return value?
– Durai
Nov 20 '18 at 13:44
add a comment |
Finally I got it.
zval **return_value_ptr = &EX_TMP_VAR(execute_data, execute_data->opline->result.var)->var.ptr;
return_value_ptr is has the return value of currently executed function.
answered Nov 29 '18 at 13:36
DuraiDurai
289
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
zval *rvalue = *(data->original_return_value); // crashing here
Its because of the last deref of original_return_value.
Either the data object or original_return_value is uninitialized or corrupted memory.
answered Nov 20 '18 at 13:34
darunedarune
1,338516
The data object has the value.May be original_return_value points the corrupted memory. Other than this,how can i get the function return value?
– Durai
Nov 20 '18 at 13:44
add a comment |
zval *rvalue = *(data->original_return_value); // crashing here
Its because of the last deref of original_return_value.
Either the data object or original_return_value is uninitialized or corrupted memory.
answered Nov 20 '18 at 13:34
darunedarune
1,338516
The data object has the value.May be original_return_value points the corrupted memory. Other than this,how can i get the function return value?
– Durai
Nov 20 '18 at 13:44
add a comment |
zval *rvalue = *(data->original_return_value); // crashing here
Its because of the last deref of original_return_value.
Either the data object or original_return_value is uninitialized or corrupted memory.
answered Nov 20 '18 at 13:34
darunedarune
1,338516
zval *rvalue = *(data->original_return_value); // crashing here
Its because of the last deref of original_return_value.
Either the data object or original_return_value is uninitialized or corrupted memory.
answered Nov 20 '18 at 13:34
darunedarune
1,338516
answered Nov 20 '18 at 13:34
darunedarune
1,338516
answered Nov 20 '18 at 13:34
darunedarune
1,338516
answered Nov 20 '18 at 13:34
darunedarune
1,338516
1,338516
The data object has the value.May be original_return_value points the corrupted memory. Other than this,how can i get the function return value?
– Durai
Nov 20 '18 at 13:44
add a comment |
The data object has the value.May be original_return_value points the corrupted memory. Other than this,how can i get the function return value?
– Durai
Nov 20 '18 at 13:44
The data object has the value.May be original_return_value points the corrupted memory. Other than this,how can i get the function return value?
– Durai
Nov 20 '18 at 13:44
The data object has the value.May be original_return_value points the corrupted memory. Other than this,how can i get the function return value?
– Durai
Nov 20 '18 at 13:44
add a comment |
Finally I got it.
zval **return_value_ptr = &EX_TMP_VAR(execute_data, execute_data->opline->result.var)->var.ptr;
return_value_ptr is has the return value of currently executed function.
answered Nov 29 '18 at 13:36
DuraiDurai
289
add a comment |
Finally I got it.
zval **return_value_ptr = &EX_TMP_VAR(execute_data, execute_data->opline->result.var)->var.ptr;
return_value_ptr is has the return value of currently executed function.
answered Nov 29 '18 at 13:36
DuraiDurai
289
add a comment |
Finally I got it.
zval **return_value_ptr = &EX_TMP_VAR(execute_data, execute_data->opline->result.var)->var.ptr;
return_value_ptr is has the return value of currently executed function.
answered Nov 29 '18 at 13:36
DuraiDurai
289
Finally I got it.
zval **return_value_ptr = &EX_TMP_VAR(execute_data, execute_data->opline->result.var)->var.ptr;
return_value_ptr is has the return value of currently executed function.
answered Nov 29 '18 at 13:36
DuraiDurai
289
answered Nov 29 '18 at 13:36
DuraiDurai
289
answered Nov 29 '18 at 13:36
DuraiDurai
289
answered Nov 29 '18 at 13:36
DuraiDurai
289
289
add a comment |
add a comment |
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I tried with EG(return_value_ptr_ptr) global also,still i didn't get.
– Durai
Nov 23 '18 at 12:42