Fix tracked_realloc

We should only drop the information about the old allocation after
checking the memory limit. This makes the code a bit more awkward...

Enforce memory limit in tracked allocation mode

A very basic limit (for single allocations) was already enforced.
This extends it to count the total memory allocations.

This is

Enforce memory limit in tracked allocation mode

A very basic limit (for single allocations) was already enforced.
This extends it to count the total memory allocations.

This is useful to avoid out of memory conditions while fuzzing.

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Drop the unneeded pointer casting

The standard says that "A pointer to void may be converted to or from a
pointer to any object type". So the casting is unneeded.

REF:
*

Drop the unneeded pointer casting

The standard says that "A pointer to void may be converted to or from a
pointer to any object type". So the casting is unneeded.

REF:
* c11: http://port70.net/~nsz/c/c11/n1570.html#6.3.2.3p1
* c99: http://port70.net/~nsz/c/c99/n1256.html

Closes GH-5916

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Add crude memory limit to tracked alloc

Check whether the requested allocation size exceeds limit (rather
than the cumulative size).

This is useful to prevent allocations trigge

Add crude memory limit to tracked alloc

Check whether the requested allocation size exceeds limit (rather
than the cumulative size).

This is useful to prevent allocations triggering OOM during fuzzing.

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Merge branch 'PHP-7.4'

* PHP-7.4:
Fixed incorrect behavior of internal memory debugger

Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
Fixed incorrect behavior of internal memory debugger

Fixed incorrect behavior of internal memory debugger

Fix miscellaneous typos in docs and error messages

Closes GH-4863.

Reverting push to wrong repo

Update alloc patch

Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
Fix #78620: Out of memory error

Merge branch 'PHP-7.2' into PHP-7.3

* PHP-7.2:
Fix #78620: Out of memory error

Fix #78620: Out of memory error

The integer addition in `ZEND_MM_ALIGNED_SIZE_EX` can overflow, what we
have to catch early.

Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
Revert "Fix #78620: Out of memory error"

Merge branch 'PHP-7.2' into PHP-7.3

* PHP-7.2:
Revert "Fix #78620: Out of memory error"

Revert "Fix #78620: Out of memory error"

This reverts commit 8ce04df7e0108a10f7b782a28204e9384ab1129c.

Cf. <https://github.com/php/php-src/pull/4766#discussion_r330658679>.

Merge branch 'PHP-7.3' into PHP-7.4

* PHP-7.3:
Fix #78620: Out of memory error

Merge branch 'PHP-7.2' into PHP-7.3

* PHP-7.2:
Fix #78620: Out of memory error

Fix #78620: Out of memory error

If the integer addition in `ZEND_MM_ALIGNED_SIZE_EX` overflows, the
macro evaluates to `0`, what we should catch early.

Monitoring anonymous pages on mac via vmmap tag

Merge branch 'PHP-7.3' into PHP-7.4

Merge branch 'PHP-7.2' into PHP-7.3

Fix overflow in memory limit checks

Due to overflows in the memory limit checks, we were missing cases
where the allocation size was close to the address space size, and
caused an OO

Fix overflow in memory limit checks

Due to overflows in the memory limit checks, we were missing cases
where the allocation size was close to the address space size, and
caused an OOM condition rather than a memory limit error.

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Fix custom heap free

This seems to be designed around the use-case where the custom
allocator is a wrapper around ZMM.

Add tracked allocator mode

In this case we will use the system allocator, but still remember
all allocations and free them the same way that Zend MM does. This
allows us to accuratel

Add tracked allocator mode

In this case we will use the system allocator, but still remember
all allocations and free them the same way that Zend MM does. This
allows us to accurately model leak behavior.

Enabled using USE_ZEND_ALLOC=0 USE_TRACKED_ALLOC=1.

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