For Clang, we just need to define the respective macros, since these
built-ins are available in all supported Clang versions (>= 4.0.0,
currently)[1].
For MSVC (and possibly other compilers) we use the respective APIs of
intsafe.h[2] which are available as of Windows 7/Server 2008 R2.
This avoids the UB due to signed integer overflow that may happen with
our fallback implementations.
We also drop the superfluous SHORT_MAX definition from pdo_firebird.
This shouldn't be defined unconditionally, but since it is apparently
unused, we remove it altogether.
[1] <https://releases.llvm.org/4.0.0/tools/clang/docs/LanguageExtensions.html>
[2] <https://learn.microsoft.com/en-us/windows/win32/api/intsafe/>
As per the discussion in GH-17120, we are printing a placeholder value only.
The commit history of that PR also includes alternative implementations, should
a different decision be desirable.
Fixes GH-17096
Closes GH-17120
Given that the `ZEND_AST_OP_ARRAY` type already needed special handling in
various places, it makes sense to give it its own struct to avoid some of the
casts. As a side benefit, it is a little smaller than the `zend_ast_zval`
struct.
* zend_compile: Do not traverse children of ZEND_AST_CLOSURE in zend_compile_const_expr()
* Add assertions verifying that zend_ast_decl AST nodes are not treated as regular zend_ast nodes
The current code expects the property name to be a string, but it can
also be a number via the {} syntax. Handle this consistently to a string
by using zval_get_string which will do the type coercion and refcount
update (instead of assuming string and doing an explicit string copy).
Closes GH-17236.
Replaces GH-15730 as that PR became stale.
But instead of introducing a new helper, reuse
smart_str_append_escaped(), this also removes the dependency on
ext/standard.
Closes GH-15730.
Closes GH-17277.
The error handling is incomplete on argument cleanup.
1. The fci is not cleared which means that zend_free_trampoline() is
never called.
2. The cleaning for extra named arguments was missing, resulting in
memory leak.
Closes GH-17219.
When observer is enabled, we normally add an extra temporary to all
functions, to store the previously observed frame. However, this is done in
zend_observer_post_startup() so it doesn't happen to dl'ed() functions.
One possible fix would be to move that from zend_observer_post_startup()
to zend_register_functions(), but this would be too early: Observer may
not be enabled when zend_register_functions() is called, and may still be
enabled later.
However, when zend_register_functions() is called at run-time (during dl()),
we know definitively whether observer is enabled.
Here I update zend_register_functions() to add a temporary to dl'ed()
functions when observer is enabled.
Fixes: GH-17211
Closes: GH-17220
Adding strings to the worklist is useless, because they never contribute to
cycles. The assembly size on x86_64 does not change. This significantly improves
performance in this synthetic benchmark by 33%.
function test($a) {}
$a = new stdClass();
$a->self = $a;
$a->prop1 = str_repeat('a', 10);
$a->prop2 = str_repeat('a', 10);
$a->prop3 = str_repeat('a', 10);
$a->prop4 = str_repeat('a', 10);
$a->prop5 = str_repeat('a', 10);
$a->prop6 = str_repeat('a', 10);
$a->prop7 = str_repeat('a', 10);
$a->prop8 = str_repeat('a', 10);
$a->prop9 = str_repeat('a', 10);
$a->prop10 = str_repeat('a', 10);
for ($i = 0; $i < 10_000_000; $i++) {
test($a);
gc_collect_cycles();
}
This requires adding IS_TYPE_COLLECTABLE to IS_REFERENCE_EX to ensure these
values continue to be pushed onto the stack. Luckily, IS_TYPE_COLLECTABLE is
currently only used in gc_check_possible_root(), where the checked value cannot
be a reference.
Note that this changes the output of gc_collect_cycles(). Non-cyclic, refcounted
values no longer count towards the total reported values collected.
Also, there is some obvious overlap with GH-17130. This change should be good
nonetheless, especially if we can remove the GC_COLLECTABLE(Z_COUNTED_P(zv))
condition in PHP 9 and rely on Z_COLLECTABLE_P() exclusively, given we can
assume an object doesn't become cyclic at runtime anymore.
Closes GH-17194
