Crash when the memory on host is insufficient about rv32emu

[tony2037]

#449 is just an idea. Perhaps allowing user to config accordingly is the most intuitive way to solve this problem.

[vacantron]

Maybe modifying the setting of the overcommit fix this problem? Try echo 1 | sudo tee /proc/sys/vm/overcommit_memory.

[jserv]

@qwe661234, Check the necessary and desirable memory region required by mmap.

[jserv]

Alternatively, we could adopt the approach used by the mmap_allocator, a memory allocator based on mmap that allows users to allocate dynamic memory in the mmap region. This could particularly benefit processes with limited swap space, such as those running in restricted containers or virtual machines, by utilizing kernel-managed file cache for swapping.

Check its mmap_maptemp function.