The bionic libc test hello_world fails

[whn09]

Description
hello_world.cpp fails. The father process calls "cout" function. But something goes wrong.

Reproduce Steps
cd ~/ucore_plus/ucore
./uCore_test -s bionic -w 15 -t 45 -f src/user-ucore/testspecs/test_hello_world.testpec

Current Result
From the serial console:

kernel_execve: pid = 4, name = "/bionic-test/test_hello_world".
sfs: unmount: 'simple file system' (1701/10587/12288)
vfs: unmount disk0.
all user-mode processes have quit.
kernel panic at proc.c:1970:
assertion failed: nr_process == 1 + pls_read(lcpu_count)
Welcome to the kernel debug monitor!!
Type 'help' for a list of commands.

Expected Result
Hello World

Future Work
The problem maybe caused by lacking of bioniclibc library. But, although I put bioniclibc library to the sfs, somethings goes wrong too. I will solve the bug in the week. Maybe it's caused by the high address '0xffffXXXX' which is pagefault.