Ejemplo n.º 1
0
def test_arena_protect():
    a = arena_malloc(100, False)
    S = lltype.Struct('S', ('x', lltype.Signed))
    arena_reserve(a, llmemory.sizeof(S))
    p = llmemory.cast_adr_to_ptr(a, lltype.Ptr(S))
    p.x = 123
    assert p.x == 123
    arena_protect(a, 100, True)
    py.test.raises(ArenaError, arena_reserve, a + 48, llmemory.sizeof(S))
    py.test.raises(RuntimeError, "p.x")
    py.test.raises(RuntimeError, "p.x = 124")
    arena_protect(a, 100, False)
    assert p.x == 123
    p.x = 125
    assert p.x == 125
Ejemplo n.º 2
0
 def fn(argv):
     testrun = int(argv[1])
     a = arena_malloc(65536, False)
     arena_reserve(a, llmemory.sizeof(S))
     p = llmemory.cast_adr_to_ptr(a + 23432, lltype.Ptr(S))
     p.x = 123
     assert p.x == 123
     arena_protect(a, 65536, True)
     result = 0
     if testrun == 1:
         print p.x  # segfault
     if testrun == 2:
         p.x = 124  # segfault
     arena_protect(a, 65536, False)
     p.x += 10
     print p.x
     return 0