Re-enable the debug-build reentrancy check in TCMalloc. - #1014
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In debug builds, `ReentrancyGuard` now `TC_CHECK`s that `malloc`/`free` are not reentered on the same thread, e.g. from a malloc hook or a signal handler. Since the guard has a non-trivial destructor, `fast_alloc` only tail-calls `slow_alloc_large` when `NDEBUG` is defined. PiperOrigin-RevId: 984026215
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Re-enable the debug-build reentrancy check in TCMalloc.
In debug builds,
ReentrancyGuardnowTC_CHECKs thatmalloc/freearenot reentered on the same thread, e.g. from a malloc hook or a signal handler.
Since the guard has a non-trivial destructor,
fast_alloconly tail-callsslow_alloc_largewhenNDEBUGis defined.