We must not use the same shared memory OPcache instance for different
SAPIs, since their memory layout is different. To avoid this, we add
the SAPI name (truncated to at most 20 characters) to the names of the
memory base file, the mutex and the file mapping.
And `$x = !$x`
Noticed while working on GH-4912
The included test would not emit undefined variable errors in php 8.0
with opcache enabled. The command used:
```
php -d zend_extension=opcache.so --no-php-ini -d error_reporting=E_ALL \
-d opcache.file_cache= -d opcache.enable_cli=1 test.php
```
Opcache stores `opline->handler`s in shared memory. These pointers are
invalid, if the main PHP DLL is loaded at another base address due to
ASLR. We therefore store the address of `execute_ex` in the mmap base
file, and check on startup whether it matches its current address. If
not, we fall back on the file cache if enabled, and bail out otherwise.
This still does not address cases where the opline handler is located
inside of another DLL (e.g. for some profilers, debuggers), but there
seems to be no general solution for now.
(cherry picked from commit 8ba10b8fbc)
It can return false if the resource type is wrong.
```
php > var_export(hash_update_stream(hash_init('md5'),
imagecreate(1,1)));
Warning: hash_update_stream(): supplied resource is not a valid stream
resource in php shell code on line 1
false
```
The return types were initially added in
c88ffa9a56
This can also return an array. See
https://www.php.net/manual/en/function.time-nanosleep.php#refsect1-function.time-nanosleep-returnvalues
> If the delay was interrupted by a signal, an associative array will be
returned with the components:
>
> - seconds - number of seconds remaining in the delay
> - nanoseconds - number of nanoseconds remaining in the delay
Sending a SIGUSR1 to the below program would trigger this behavior.
```
pcntl_signal(\SIGUSR1, function ($signo, $signinfo) {
echo "Handling a signal $signo\n";
});
echo "Sleeping for 100 seconds\n";
var_export(time_nanosleep(100, 0));
```
The incomplete signature existed since c88ffa9a5.
No phpt tests existed for time_nanosleep returning an array
There are a few parts here:
* opcache should not be blocking signals while invoking compile_file,
otherwise signals may remain blocked on a compile error. While at
it, also protect SHM memory during compile_file.
* We should deactivate Zend signals at the end of the request, to make
sure that we gracefully recover from a missing unblock and signals
don't remain blocked forever.
* We don't use a critical section in deactivation, because it should
not be necessary. Additionally we want to clean up the signal queue,
if it is non-empty.
* Enable SIGG(check) in debug builds so we notice issues in the future.
The smart branch logic assumed b->start refers to the old offsets,
while b->start was already adjusted to the new offsets at this
point. Delay the change until later.
New opcache directives have been added recently which are returned
if using `ini_get_all('zend opcache')` but are not listed in the
directives if using `opcache_get_configuration()`. This fix adds
those missing directives as well as if `opcache.mmap_base` is used
instead of `opcache.lockfile_path`. Also adds a test to ensure the
directives match with both methods of fetching.
When cleaning nops in the dfa pass, we were always keeping the
smart branch inhibiting nop that occurs directly before the jump
instruction. However, as we skip unreachable blocks entirely, it
may happen that we need to keep a nop that occurs further back,
prior to the unreachable blocks. Account for that case now.
We should really do something about the smart branch situation,
this is very fragile...
opcache incorrectly handles PHAR files when opcache.validate_permission
option enabled, because it calls
access("phar://path-to/file.phar/path/inside.php", R_OK);
rather than
access("path-to/file.phar", R_OK)
This test is easily tripped by former test runs with other PHP
versions. To avoid such false positives, we check that there is at
least one respective OPcache file, and that all found OPcache user ID
folders have exactly 32 hexadecimal digits.
Christoph M. Becker