def test_buffer_read(hack, app, basic_name_type_pairs):
buffer = gh.Buffer(hack, app.sizes.Program)
for name, type_name in basic_name_type_pairs:
for addr in app.addr.roots:
buffer.read_from(addr)
assert_basic_value(app, buffer, 0, name, type_name)
def test_buffer_read_string(hack, app):
for addr in app.addr.roots:
buffer = gh.Buffer(hack, 32)
buffer.read_from(addr + app.offsets.Basic.str, buffer.size)
assert buffer.strlen(0) == len("TestStr")
assert buffer.read_string(0, len("TestStr")) == "TestStr"
assert buffer.read_bytes(0, len("TestStr")) == b"TestStr"
def test_buffer_create_incorrect():
hack = gh.Hack()
buf1 = gh.Buffer(hack, 32)
# Buffer with size=0
with pytest.raises(RuntimeError):
buf2 = gh.Buffer(hack, 0)
# View with size=0
with pytest.raises(RuntimeError):
buf2 = gh.Buffer(buf1, 16, 0)
# View that exceeds memory range of parent
with pytest.raises(RuntimeError):
buf2 = gh.Buffer(buf1, 32, 16)
with pytest.raises(RuntimeError):
buf2 = gh.Buffer(buf1, 16, 32)
def test_buffer_write_string(hack, app, reset_app):
for addr in app.addr.roots:
buffer = gh.Buffer(hack, 32)
buffer.read_from(addr + app.offsets.Basic.str, buffer.size)
buffer.write_string(0, "StrTest")
assert buffer.read_string(0, len("StrTest")) == "StrTest"
with pytest.raises(RuntimeError):
buffer.write_string(0, "0" * 100)
def test_buffer_create():
hack = gh.Hack()
# Owning
buf1 = gh.Buffer(hack, 32)
assert 32 == buf1.size
assert 0 == buf1.read_u32(16)
buf1.write_u32(16, 10)
assert 10 == buf1.read_u32(16)
# View
buf2 = gh.Buffer(buf1, 16, 16)
assert 16 == buf2.size
assert 10 == buf2.read_u32(0)
buf2.write_u32(0, 4)
assert 4 == buf1.read_u32(16)
assert 4 == buf2.read_u32(0)
# Clear
buf1.clear()
assert 0 == buf1.read_u32(16)
assert 0 == buf2.read_u32(0)