Hi, Willy, Thomas
This is not really for merge, but only let it work as a demo code to test whether it is possible to restore the next test when there is a bad pointer access in user-space [1].
Besides, a new 'run' command is added to 'NOLIBC_TEST' environment variable or arguments to control the running iterations, this may be used to test the reentrancy issues, but no failures found currently ;-)
With glibc, it works as following:
$ ./nolibc-test run:2,syscall:28-30,stdlib:1 Running iteration(s): 2
Current iteration: 1
Running test 'syscall', from 28 to 30 28 dup3_m1 = -1 EBADF [OK] 29 efault_handler ! 11 SIGSEGV [OK] 30 execve_root = -1 EACCES [OK] Errors during this test: 0
Running test 'stdlib' 1 getenv_blah = <(null)> [OK] Errors during this test: 0
Total number of errors in the 1 iteration(s): 0
Current iteration: 2
Running test 'syscall' 28 dup3_m1 = -1 EBADF [OK] 29 efault_handler ! 11 SIGSEGV [OK] 30 execve_root = -1 EACCES [OK] Errors during this test: 0
Running test 'stdlib' 1 getenv_blah = <(null)> [OK] Errors during this test: 0
Total number of errors in the 2 iteration(s): 0
With nolibc, it will be skipped (run:2,syscall:28-30,stdlib:10):
Running iteration(s): 2
Current iteration: 1
Running test 'syscall', from 28 to 30 28 dup3_m1 = -1 EBADF [OK] 29 efault_handler [SKIPPED] 30 execve_root = -1 EACCES [OK] Errors during this test: 0
Running test 'stdlib', from 10 to 10 10 strrchr_foobar_o = <obar> [OK] Errors during this test: 0
Total number of errors in the 1 iteration(s): 0
Current iteration: 2
Running test 'syscall', from 28 to 30 28 dup3_m1 = -1 EBADF [OK] 29 efault_handler [SKIPPED] 30 execve_root = -1 EACCES [OK] Errors during this test: 0
Running test 'stdlib', from 10 to 10 10 strrchr_foobar_o = <obar> [OK] Errors during this test: 0
Total number of errors in the 2 iteration(s): 0
Best regards, Zhangjin ---
[1]: https://lore.kernel.org/linux-riscv/20230529113143.GB2762@1wt.eu/
Zhangjin Wu (4): selftests/nolibc: allow rerun with the same settings selftests/nolibc: add rerun support selftests/nolibc: add user space efault handler selftests/nolibc: add user-space efault restore test case
tools/testing/selftests/nolibc/nolibc-test.c | 247 +++++++++++++++++-- 1 file changed, 221 insertions(+), 26 deletions(-)