This commit disallows the use of trailing positional arguments
after argument unpacking was used. The following calls are no
longer valid:
fn(...$array, $var);
fn(...$array1, $var, ...$array2);
However, all of the following continue to be valid:
fn($var, ...$array);
fn(...$array1, ...$array2);
fn($var, ...$array1, ...$array2);
The reason behind this change is a stack allocation issue pointed
out by Dmitry: As of PHP 5.5 the stack necessary for pushing
arguments is precomputed and preallocated, as such the individual
SEND opcodes no longer verify that there is enough stack space.
The unpacked arguments will occupy some of that preallocated
space and as such following positional arguments could write past
a stack page boundary.
An alternative resolution for this issue is to ensure that there
is enough space for the remaining arguments in the UNPACK opcode.
However making this allocation precise (rather than using a
conversative over-estimate) would require some effort. Given that
this particular aspect of the feature wasn't very popular in the
first place, it doesn't seem worth the effort.
If multiple unpacks were used (or mixed with normal arguments)
parts of the arguments could land on different stack pages. If
this occurs the arguments will now be copied to a new stack page.
The code used to do this is copied verbatim from the PHP 5.4 branch
and only modified to reduce the amount of inlined code.
std_compare_objects immidiately returned 0 if the property tables
of both objects contain NULL at some index. Thus it would report
objects as equal even though properties following after that
differ.
When Wincache or APC are installed, the resource IDs are not the same.
This is because Wincache takes a few resource objects for itself. As a
result, these tests become false positives.
On Windows boxes, the microtime precision is not granular enough
to reliably register a difference if two calls to uniqid() are made
concurrently. This is a fix to the uniqid() test to avoid the false
positive when run on Windows machines. Also, added a test to exercise
the 'more_entropy' variant of uniqid().
Functions registered using zend_register_functions instead of zend_module_entry.functions are not seen on reflection.
Ex: additional_functions from api_module_entry.
Ex: in CLI, dl, cli_set_process_title and cli_get_process_title
Note:
- also affects functions overrided in extension
(should be be reported in extension, where overrided, not in original extension)
- also allow extension to call zend_register_functions for various list
(instead of having a single bug list)
Bob Weinand