Casting from pointer to array is special, so we must not fall back to
the general FFI casting. There is a particular issue regarding the
size comparison, namely that the pointer size is always 8 for 64bit
architectures, but the size of an array is determined by its
declaration, so as is casting a pointer to an array with more than 8
elements would fail, but casting to an array with less than 9 elements
succeeds, but the internal pointer would point to some arbitrary
memory.
We fix this by properly supporting the cast. An alternative would be
to deny this kind of cast generally, since it is not necessarily safe.
However, FFI isn't necessarily safe anyway.
We also check pointer/array type compatibility when casting.
Co-authored-by: Dmitry Stogov <dmitry@zend.com>
Closes GH-7876.
JIT ignores that the `zend_write` callback is overwritten, so we define
our own callback and caller.
We also fix the "inconsistent DLL binding" warnings on Windows, by
introducing `PHP_ZEND_TEST_API`.
Closes GH-6391.
We have to error on unhandled exceptions in FFI callbacks, to avoid
passing back undefined values.
This has been discussed and agreed upon in a previous PR[1].
[1] <https://github.com/php/php-src/pull/5120>
Closes GH-6366.
Casting objects to bool is supposed to yield `true`. Since the
`cast_object` handler is required now, we have to implement the
`_IS_BOOL` conversion there.
--file-cache-prime populates the file cache,
--file-cache-use uses the file cache.
And fix a number of tests to run under file cache or disabled
timestamp validation.
We must not attempt to access arbitrary union members when retrieving
debug info, because that may not be valid. Therefore we do no longer
dereference pointer types inside of unions, but report their address as
string in `%p` format instead.
We have to actually determine the proper `SIZEOF_OFF_T`.
Interestingly, it is `4` on Windows x64.
We also have to prevent the redefinition in pg_config.h. The clean
solution would likely be to not include pg_config.h at all, but that's
out of scope for BC reasons for now.
We add Windows support to four existing test cases, extract some useful
utility functions, and use them to simplify further test cases.
We also remove the Windows specific code from preload.inc, since
preloading isn't supported on Windows anyway.
* PHP-7.4:
Disable instantiation of zero size FFI\CData objects
Fix # 79171: heap-buffer-overflow in phar_extract_file
Fix bug #79082 - Files added to tar with Phar::buildFromIterator have all-access permissions
Fix bug #79221 - Null Pointer Dereference in PHP Session Upload Progress
We must not assume that the size of a function's return value is at
most `sizeof(ffi_arg)`, but rather have to use the size which already
has been determined for the return type if it is larger than
`sizeof(ffi_arg)`.
To be able to have a regression test, we export the required test
function from the zend-test extension, and make sure that the test
can be run on different platforms regardless of whether zend-tests was
built statically or dynamically.
