Function GetMemoryChunkContext

src/include/utils/memutils.h:162–183

 */
#ifndef FRONTEND
static inline MemoryContext
GetMemoryChunkContext(void *pointer)
{
	MemoryContext context;

	/*
	 * Try to detect bogus pointers handed to us, poorly though we can.
	 * Presumably, a pointer that isn't MAXALIGNED isn't pointing at an
	 * allocated chunk.
	 */
	Assert(pointer != NULL);
	Assert(pointer == (void *) MAXALIGN(pointer));

	/*
	 * OK, it's probably safe to look at the context.
	 */
	context = *(MemoryContext *) (((char *) pointer) - sizeof(void *));

	AssertArg(MemoryContextIsValid(context));

	return context;
}
#endif

/*