This fixes bug #60097.
Before two global variables CG(heredoc) and CG(heredoc_len) were used to
track the current heredoc label. In order to support nested heredoc
strings the *previous* heredoc label was assigned as the token value of
T_START_HEREDOC and the language_parser.y assigned that to CG(heredoc).
This created a dependency of the lexer on the parser. Thus the
token_get_all() function, which accesses the lexer directly without
also running the parser, was not able to tokenize nested heredoc strings
(and leaked memory). Same applies for the source-code highlighting
functions.
The new approach is to maintain a heredoc_label_stack in the lexer, which
contains all active heredoc labels.
As it is no longer required, T_START_HEREDOC and T_END_HEREDOC now don't
carry a token value anymore.
In order to make the work with zend_ptr_stack in this context more
convenient I added a new function zend_ptr_stack_top(), which retrieves the
top element of the stack (similar to zend_stack_top()).
. zend_function.pass_rest_by_reference is replaced by
ZEND_ACC_PASS_REST_BY_REFERENCE in zend_function.fn_flags
. zend_function.return_reference is replaced by ZEND_ACC_RETURN_REFERENCE
in zend_function.fn_flags
. zend_arg_info.required_num_args removed. it was needed only for internal
functions. Now the first arg_info for internal function (which has special
meaning) is represented by zend_internal_function_info structure.
. zend_op_array.size, size_var, size_literal, current_brk_cont,
backpatch_count moved into CG(context), because they are used only during
compilation.
. zend_op_array.start_op is moved into EG(start_op), because it's used
only for 'interactive' execution of single top-level op-array.
. zend_op_array.done_pass_two is replaced by ZEND_ACC_DONE_PASS_TWO in
zend_op_array.fn_flags.
. op_array.vars array is trimmed (reallocated) during pass_two.
. zend_class_entry.constants_updated is replaced by
ZEND_ACC_CONSTANTS_UPDATED in zend_class_entry.ce_flags
. the size of zend_class_entry is reduced by sharing the same memory space
by different information for internal and user classes.
See zend_class_inttry.info union.
sigsetjmp use setjmp. Windows is of course weird in that it seems to
have sigsetjmp but not sigjmp_buf (??) so force it to use setjmp in
config.w32.h.in
consistent in how we deal with the signal mask. POSIX doesn't specify
what to do with the signal mask in setjmp/longjmp which has resulted in
the signal mask getting saved on *BSD and not getting saved on Linux.
Making the behaviour explicit via sigsetjmp/siglongjmp gives us
consistency and saves expensive sigprocmask() syscalls on *BSD.
The following pseudo-code explains how it should be used in opcode cache.
function cache_compile_file($filename) {
if (!is_cached($filename)) {
...
orig_compiler_options = CG(compiler_optins);
CG(compiler_options) |= ZEND_COMPILE_IGNORE_INTERNAL_CLASSES |
ZEND_COMPILE_DELAYED_BINDING;
$op_array = orig_compile_file($filename);
CG(compiler_options) = orig_copiler_options;
...
} else {
$op_array = restore_from_cache($filename);
}
zend_do_delayed_early_binding($op_array);
}
- Added ".htaccess" style user-defined php.ini files support for
CGI/FastCGI.
- Added support for special [PATH=/opt/httpd/www.example.com/] sections
in php.ini. All directives set in these sections will not be able to be
overridden in user-defined ini-files or during runtime in the specified
path.
- Improved php.ini handling:
. Added better error reporting for syntax errors in php.ini files
. Allowed "ini-variables" to be used almost everywhere ini php.ini files
. Allowed using alphanumeric/variable indexes in "array" ini options
. Fixed get_cfg_var() to be able to return "array" ini options
- Fixed bug #27372 (parse error loading browscap.ini at apache startup)
- Fixed bug #42069 (parse_ini_file() allows using some non-alpha numeric
characters)
- Perform implementation checks even with simple inheritance (off when
compatibility mode is enabled).
- Restore default arguments in interfaces and handle it correctly.
- Move registration of internal classes later in the startup sequence
in order to have INI options available.
implementation, and allows exceptions to 'fire' much earlier than before.
Instructions on how to use the new mechanism will follow on internals@
shortly...
Note - this (most probably) breaks the current implementation of
set_exception_handler()
this enables ZE2 to gracefully parse scripts written in UTF-8 (with BOM),
UTF-16, UTF-32, Shift_JIS, ISO-2022-JP etc... (when configured with
'--enable-zend-multibyte' and '--enable-mbstring')
