Handle holes in zend_get_opcode_id()

Some opcodes may currently not be allocated.

Merge branch 'PHP-8.0' into PHP-8.1

* PHP-8.0:
Fix clobering of operand by error handler in assignment to string offset

Fix clobering of operand by error handler in assignment to string offset

In some cases new code requires two reallocations insead of one.

Fixes oss-fuzz #31716, #36196, #39739 and #

Fix clobering of operand by error handler in assignment to string offset

In some cases new code requires two reallocations insead of one.

Fixes oss-fuzz #31716, #36196, #39739 and #40002

show more ...

Merge branch 'PHP-8.0' into PHP-8.1

* PHP-8.0:
Suppress unused label warnings in SWITCH VM

Suppress unused label warnings in SWITCH VM

While we avoid emitting labels for handlers that are not referenced
from anywhere else, we do not perform a fine-grained analysis on
used

Suppress unused label warnings in SWITCH VM

While we avoid emitting labels for handlers that are not referenced
from anywhere else, we do not perform a fine-grained analysis on
used specializations, so some of the specialization labels may not
be used. Use ATTRIBUTE_UNUSED_LABEL to suppress the warning. Drop
"cold" from the definition of this attribute, as it is completely
unrelated.

show more ...

Fix a typo in function execute_ex (#7315)

Correct DWARF frame description.

Now GDB correctly shows backtraces that involves JIT-ed code for
functional/tracing JIT, HYBRID/CALL VM, x86/AArch64 CPU.
(opcache.jit_debug=0x100 sh

Correct DWARF frame description.

Now GDB correctly shows backtraces that involves JIT-ed code for
functional/tracing JIT, HYBRID/CALL VM, x86/AArch64 CPU.
(opcache.jit_debug=0x100 should be set).

show more ...

Disable "red zone" usage (it leads to crashes).

Use "red zone" for HYBRID VM.
Support for CALL VM and VM without global register variables.

Update zend_vm_gen.php with zend_vm_opcode.c/h changes

The generated files were modified directly, resulting in mysterious
build failures depending on exact build order.

Fix E_DEPRECATED in zend_vm_gen.php

explode(): Passing null to parameter #2 ($string) of type string is
deprecated

Closes GH-6698.

Avoid writing zend_vm_opcodes.h if it did not change

Now that we track header changes, a change to zend_vm_opcodes.h
requires rebuilding essentially the whole tree. In most cases,
ch

Avoid writing zend_vm_opcodes.h if it did not change

Now that we track header changes, a change to zend_vm_opcodes.h
requires rebuilding essentially the whole tree. In most cases,
changes to zend_vm_def.h don't actually result in any header
changes though.

Avoid touching the file by first checking whether the to be written
contents are actually the same.

show more ...

Coding style tweaks for zend_vm_gen.php

- fixed array style for $vm_kind_name and $op_types
- deleted unnecessary else statement for is_hot_helper function
- fixed concatenation styl

Coding style tweaks for zend_vm_gen.php

- fixed array style for $vm_kind_name and $op_types
- deleted unnecessary else statement for is_hot_helper function
- fixed concatenation style
- fixed style of using whitespace between "(" and switch/foreach - replaced !is_null with "!=="

Closes GH-6704.

show more ...

Disable stack reuse optimization for x86 PIC code. It may clobber local variable used for Global Offset Table.

Preallocate stack space for JIT in execute_ex() to eliminate JIT prologue/epilogue.

Provide unused retvals to observers

Make sure that the return value is available to observers, even if
it is not used by the caller.

Closes GH-6422.

[Observer] Save opline before calling begin/end handlers

Cleanup observer API and add JIT support

Remove specialization of SPEC(OBSERVER) handlers

Add zend_observer API

Closes GH-5857.

Co-authored-by: Nikita Popov <nikita.ppv@gmail.com>
Co-authored-by: Sammy Powers <sammyk@datadoghq.com>

SAVE_OPLINE in NULL_HANDLER

Let's avoid crashing before the nice error message gets printed...

Implement named parameters

From an engine perspective, named parameters mainly add three
concepts:

* The SEND_* opcodes now accept a CONST op2, which is the
argument nam

Implement named parameters

From an engine perspective, named parameters mainly add three
concepts:

* The SEND_* opcodes now accept a CONST op2, which is the
argument name. For now, it is looked up by linear scan and
runtime cached.
* This may leave UNDEF arguments on the stack. To avoid having
to deal with them in other places, a CHECK_UNDEF_ARGS opcode
is used to either replace them with defaults, or error.
* For variadic functions, EX(extra_named_params) are collected
and need to be freed based on ZEND_CALL_HAS_EXTRA_NAMED_PARAMS.

RFC: https://wiki.php.net/rfc/named_params

Closes GH-5357.

show more ...

Remove FREE_UNFETCHED concept

In master normal FREE_OPs work like FREE_UNFETCHED_OP used to, so
there is no point in keeping this distinction anymore, it's just
confusing.

Assert exception set in HANDLE_EXCEPTION()

Some code paths were checking this manually, but we can turn this
into a general assertion to avoid surprises (functions returning
failure

Assert exception set in HANDLE_EXCEPTION()

Some code paths were checking this manually, but we can turn this
into a general assertion to avoid surprises (functions returning
failure without throwing).

show more ...

Remove #undefs from vm_gen

Possibly these were needed for VM_EXPORT, but they don't serve a
purpose now.