* Add string output escaping into zend dump (phpdbg + opcache debug)
* Use ZSTR_VAL macro instead direct string access
* Move "escaped_string" into local switch/case scope
* Add zend_string_release
* Add Z_STR_P macro instead direct string access
* Merge zend_string declaration and its assigment in one stmt
The block optimizer pass allows the use of sources of the preceding
block if the block is a follower and not a target. This causes issues
when trying to remove FREE instructions: if the source is not in the
block of the FREE, then the FREE and source are still removed. Therefore
the other successor blocks, which must consume or FREE the temporary,
will still contain the FREE opline. This opline will now refer to a
temporary that doesn't exist anymore, which most of the time results in
a crash. For these kind of non-local scenarios, we'll let the SSA
based optimizations handle those cases.
Closes GH-11251.
This will allow us to easily check in other mbstring functions if the
list of all supported encodings, returned by mb_list_encodings, is
passed in as input to another function.
Co-authored-by: Ilija Tovilo <ilija.tovilo@me.com>
There is a typo which causes the AND and OR range inference to infer a
wider range than necessary. Fix this typo. There are many ranges for
which the inference is too wide, I just picked one for AND and one for
OR that I found through symbolic execution.
In this example test, the previous range inferred for test_or was [-27..-1]
instead of [-20..-1].
And the previous range inferred for test_and was [-32..-25]
instead of [-28..-25].
Closes GH-11170.
Struct members require some alignment based on their type. This means
that if a struct member is not aligned, there will be a hole created by
the compiler in the struct, which is wasted space. This patch reorders
some of the most commonly used structs, but in such a way that the
fields which were in the same cache line still belong together.
The only exception to this is exception_ignore_args, which was
temporally not close to nearby members, and as such I placed
it further up to close a hole.
On 64-bit Linux this gives us the following shrinks:
* zend_op_array: 248 -> 240
* zend_ssa_var: 56 -> 48
* zend_ssa_var_info: 48 -> 40
* php_core_globals: 672 -> 608
* zend_executor_globals: 1824 -> 1792
On 32-bit, the sizes will either remain the same or will result in
smaller shrinks.
Fixes GH-10801
Named arguments are not supported by the constant evaluation routine, in
the sense that they are ignored. This causes two issues:
- It causes a crash because not all oplines belonging to the call are
removed, which results in SEND_VA{L,R} which should've been removed.
- It causes semantic issues (demonstrated in the test case).
This case never worked anyway, leading to crashes or incorrect behaviour,
so just prevent CTE of calls with named parameters for now.
We can choose to support it later, but introducing support for this in
a stable branch seems too dangerous.
This patch does not change the removal of SEND_* opcodes in remove_call
because the crash bug can't be triggered anymore with this patch as
there are no named parameters anymore and no variadic CTE functions
exist.
Closes GH-10811.
`zend_uchar` suggests that the value is an ASCII character, but here,
it's about very small integers. This is misleading, so let's use a
C99 integer instead.
On all architectures currently supported by PHP, `zend_uchar` and
`uint8_t` are identical. This change is only about code readability.
We can't increase the refcount of internal classes during request time.
To work around this problem we simply don't refcount aliases anymore and
add a check in the destruction to skip aliases entirely.
There were also some checks which checked for an alias implicitly by
comparing the refcount, these have been replaced by checking the type of
the zval instead.
Currently, a function is considered a prototype if the function is not
marked as final. However, a class marked as final also make it
impossible for a function to be overridden. Therefore, we know in this
case too that the function is not a prototype.
This allows the type inference algorithm to determine some types more
precisely, and can allow for more optimizations of the instructions.
Additionally, place some computation of the flags in their respective
blocks as a micro-optimization.
Note: anonymous classes *can* be extended (see test
Zend/tests/anon/011.phpt). Therefore we don't optimize this case.
Many sources need just `zend_result`, and with this new header, they
only need to include `zend_result.h` instead of `zend_types.h`; the
latter is large and has fat dependencies, which slows down the build.
The code fetched the class entry into ce for objects and static
properties. However, when the actual update needs to take place (when
result_def exists), the class entry in ce was reset to NULL. So the SSA
object type update never happened. Fetch the class entry in the
result_def>=0 case instead after the reset of ce to NULL.
The "nothing to do" case would never be hit because the switch block
would execute if the opcode is ZEND_ASSIGN_STATIC_PROP_OP,
not ZEND_ASSIGN_STATIC_PROP. This meant that we were falling through to
the else block. Fix this by correcting the check condition.
We're in the case of ZEND_JMPZ_EX or ZEND_JMPNZ_EX. The opcode gets
overwritten and only after the overwriting gets checked if we're in a
JMPZ or JMPNZ case. This results in a wrong optimization.
Close GH-10329
