Fix potential segfault when finally in a generator is run during shutdown

If a generator is destroyed in a finally block it will resume the generator to run that finally
block before fre

Fix potential segfault when finally in a generator is run during shutdown

If a generator is destroyed in a finally block it will resume the generator to run that finally
block before freeing the generator. This was done in the object storage free handler.

Running user code in the free handler isn't safe though because the free handlers may be run
during request shutdown, already after several key components have been shut down.

This is avoided by doing the finally handling in the dtor handler. These handlers are run at the
start of the shutdown sequence.

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Happy New Year

Implement Generator::throw() method

Generator::throw($exception) throws an exception into the generator. The
exception is thrown at the current point of suspension within the generator.

Implement Generator::throw() method

Generator::throw($exception) throws an exception into the generator. The
exception is thrown at the current point of suspension within the generator.
It basically behaves as if the current yield statement were replaced with
a throw statement and the generator subsequently resumed.

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Fix crash when last yielded value is a closure

If zend_generator_close is called from within zend_generator_resume (e.g.
due to a return statement) then all the EGs will still be using t

Fix crash when last yielded value is a closure

If zend_generator_close is called from within zend_generator_resume (e.g.
due to a return statement) then all the EGs will still be using the values
from the generator. That's why the stack frame has to be the last thing
that is dtored, otherwise some other dtor that is using
EG(current_execute_data) might access the already freed memory segment.
This was the case with the closure dtor.

The fix is to move the dtors for key and value to the start of the handler.
This way the stack frame is the last thing that is freed.

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Do not add a ref to EX(object) on generator clone

If a ref has to be added it will be already added while walking the call
slots.

Fix leak when generator ignores sent value

When the return value of yield wasn't used it was leaked.

This is fixed by using a TMP_VAR return value instead of VAR. TMP_VARs are
a

Fix leak when generator ignores sent value

When the return value of yield wasn't used it was leaked.

This is fixed by using a TMP_VAR return value instead of VAR. TMP_VARs are
automatically freed when they aren't used.

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Fix warning of no return in non-void function

Restored proper generators behaviour in conjunction with "finally". (Nikita)

- generators API exported for extensions
- improved RETURN sequence to avoid redundant check if op_array is a generator

Optimized access to temporary and compiled VM variables

- Fixed ZTS build

. The VM stacks for passing function arguments and syntaticaly nested calls were merged into a single stack. The stack size needed for op_array execution is calculated at compile time and preallocate

. The VM stacks for passing function arguments and syntaticaly nested calls were merged into a single stack. The stack size needed for op_array execution is calculated at compile time and preallocated at once. As result all the stack push operatins don't require checks for stack overflow any more.
. Generators implementation was improved using the new VM stack. Now it's a bit more clear and faster.

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Fix bug #63596: finally in generators segfaults

EX(fast_ret) wasn't initialized in this case so the code ended up
dereferencing an invalid pointer after the jump.

Improved "finally" im[plementation

Fixed bug #63428 (The behavior of execute() changed)

Fixed bug #63132

EG(arg_types_stack) is now also backed up when generators are used. This
allows the use of yield in nested method calls.

This commit adds two new functions to t

Fixed bug #63132

EG(arg_types_stack) is now also backed up when generators are used. This
allows the use of yield in nested method calls.

This commit adds two new functions to the zend_ptr_stack API:

zend_ptr_stack_push_from_memory
zend_ptr_stack_pop_into_memory

both taking the following arguments:

zend_ptr_stack *stack, int count, void **pointers

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Fix two op_array -> function cast warnings

- fix build, declarations must be 1st in a contextgit checkout -f master

Fixed bug #62991 (Segfault with generator and closure)

Fix typos

Fix segfault when traversing a by-ref generator twice

If you try to traverse an already closed generator an exception will now be
thrown.

Furthermore this changes the error for

Fix segfault when traversing a by-ref generator twice

If you try to traverse an already closed generator an exception will now be
thrown.

Furthermore this changes the error for traversing a by-val generator by-ref
from an E_ERROR to an Exception.

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Make sure that exception is thrown on rewind() after closing too

Fix several issues and allow rewind only at/before first yield

* Trying to resume a generator while it is already running now throws a
fatal error.
* Trying to use yield in fina

Fix several issues and allow rewind only at/before first yield

* Trying to resume a generator while it is already running now throws a
fatal error.
* Trying to use yield in finally while the generator is being force-closed
(by GC) throws a fatal error.
* Rewinding after the first yield now throws an Exception

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Run finally if generator is closed before finishing

Disallow serialization and unserialization