Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
[Debug] Add symfony_debug_backtrace() that works with fatal errors
- Loading branch information
1 parent
8be2903
commit eacdc62
Showing
7 changed files
with
329 additions
and
93 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,133 @@ | ||
Symfony Debug Extension | ||
======================= | ||
|
||
This extension publishes several functions to help building powerful debugging tools. | ||
|
||
symfony_zval_info() | ||
------------------- | ||
|
||
- exposes zval_hash/refcounts, allowing e.g. efficient exploration of arbitrary structures in PHP, | ||
- does work with references, preventing memory copying. | ||
|
||
Its behavior is about the same as: | ||
|
||
```php | ||
<?php | ||
|
||
function symfony_zval_info($key, $array, $options = 0) | ||
{ | ||
|
||
// $options is currently not used, but could be in future version. | ||
|
||
if (!array_key_exists($key, $array)) { | ||
return null; | ||
} | ||
|
||
$info = array( | ||
'type' => gettype($array[$key]), | ||
'zval_hash' => /* hashed memory address of $array[$key] */, | ||
'zval_refcount' => /* internal zval refcount of $array[$key] */, | ||
'zval_isref' => /* is_ref status of $array[$key] */, | ||
); | ||
|
||
switch ($info['type']) { | ||
case 'object': | ||
$info += array( | ||
'object_class' => get_class($array[$key]), | ||
'object_refcount' => /* internal object refcount of $array[$key] */, | ||
'object_hash' => spl_object_hash($array[$key]), | ||
'object_handle' => /* internal object handle $array[$key] */, | ||
); | ||
break; | ||
|
||
case 'resource': | ||
$info += array( | ||
'resource_handle' => (int) $array[$key], | ||
'resource_type' => get_resource_type($array[$key]), | ||
'resource_refcount' => /* internal resource refcount of $array[$key] */, | ||
); | ||
break; | ||
|
||
case 'array': | ||
$info += array( | ||
'array_count' => count($array[$key]), | ||
); | ||
break; | ||
|
||
case 'string': | ||
$info += array( | ||
'strlen' => strlen($array[$key]), | ||
); | ||
break; | ||
} | ||
|
||
return $info; | ||
} | ||
``` | ||
|
||
symfony_debug_backtrace() | ||
------------------------- | ||
|
||
This function works like debug_backtrace(), except that it can fetch the full backtrace in case of fatal errors: | ||
|
||
```php | ||
function foo() { fatal(); } | ||
function bar() { foo(); } | ||
|
||
function sd() { var_dump(symfony_debug_backtrace()); } | ||
|
||
register_shutdown_function('sd'); | ||
|
||
bar(); | ||
|
||
/* Will output | ||
Fatal error: Call to undefined function fatal() in foo.php on line 42 | ||
array(3) { | ||
[0]=> | ||
array(2) { | ||
["function"]=> | ||
string(2) "sd" | ||
["args"]=> | ||
array(0) { | ||
} | ||
} | ||
[1]=> | ||
array(4) { | ||
["file"]=> | ||
string(7) "foo.php" | ||
["line"]=> | ||
int(1) | ||
["function"]=> | ||
string(3) "foo" | ||
["args"]=> | ||
array(0) { | ||
} | ||
} | ||
[2]=> | ||
array(4) { | ||
["file"]=> | ||
string(102) "foo.php" | ||
["line"]=> | ||
int(2) | ||
["function"]=> | ||
string(3) "bar" | ||
["args"]=> | ||
array(0) { | ||
} | ||
} | ||
} | ||
*/ | ||
``` | ||
|
||
Usage | ||
----- | ||
|
||
The extension is compatible with ZTS mode, and should be supported by PHP5.3, 5.4, 5.5 and 5.6. | ||
To enable the extension from source, run: | ||
|
||
``` | ||
phpize | ||
./configure | ||
make | ||
sudo make install | ||
``` |
This file was deleted.
Oops, something went wrong.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.