1"""Test that GDB can access PROT_NONE pages. 2 3This runs as a sourced script (via -x, via run-test.py). 4 5SPDX-License-Identifier: GPL-2.0-or-later 6""" 7import ctypes 8from test_gdbstub import main, report 9 10 11def probe_proc_self_mem(): 12 buf = ctypes.create_string_buffer(b'aaa') 13 try: 14 with open("/proc/self/mem", "rb") as fp: 15 fp.seek(ctypes.addressof(buf)) 16 return fp.read(3) == b'aaa' 17 except OSError: 18 return False 19 20 21def run_test(): 22 """Run through the tests one by one""" 23 if not probe_proc_self_mem(): 24 print("SKIP: /proc/self/mem is not usable") 25 exit(0) 26 gdb.Breakpoint("break_here") 27 gdb.execute("continue") 28 val = gdb.parse_and_eval("*(char[2] *)q").string() 29 report(val == "42", "{} == 42".format(val)) 30 gdb.execute("set *(char[3] *)q = \"24\"") 31 gdb.execute("continue") 32 exitcode = int(gdb.parse_and_eval("$_exitcode")) 33 report(exitcode == 0, "{} == 0".format(exitcode)) 34 35 36main(run_test) 37