Tests fail on aarch64 with "Cannot allocate memory"

[jpalus]

Nearly all of criterion tests fail on aarch64 with:

criterion: Could not initialize inheritable arena: Cannot allocate memory

That's because BoxFort assumes minimal address space for 64-bit hosts of 48-bit:

BoxFort/src/arena.c

Lines 56 to 61 in a26074c

	#elif BXF_BITS == 64
	/* On Linux it seems that you cannot map > 48-bit addresses */
	static void *mmap_base = (void *) 0x200000000000;
	static void *mmap_max = (void *) 0x7f0000000000;
	static intptr_t mmap_off = (intptr_t) 1 << 24;
	static intptr_t mmap_off_mask = 0x3fffff;

While on aarch64 it is possible to to have 39-bit address space see https://www.kernel.org/doc/Documentation/arm64/memory.rst

[Sakura286]

Similar on riscv64. context.c test failed due to invalid memory address allocation of mmap in arena.c.

39 bit address space sv39 are widely used on riscv64 too.
https://docs.kernel.org/riscv/vm-layout.html

[Sakura286]

@jpalus I am trying to fix this. Could you find the way to know which memory-layout is used, such as cat /proc/cpuinfo? I haven't got an AArch64 machine.