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author | Kevin Cheng <kevcheng@google.com> | 2019-04-18 11:31:16 -0700 |
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committer | Kevin Cheng <kevcheng@google.com> | 2019-05-02 13:59:40 -0700 |
commit | 757c264bc10ebc71074ee3f5fb66d670667a09bc (patch) | |
tree | 26c7f7b74c752db99d9b0ac1f94fc592aca1e53a /testing/cffi0/test_ffi_backend.py | |
parent | 99013222844839c42437f16eace25f4e6a8a8b20 (diff) | |
download | cffi-757c264bc10ebc71074ee3f5fb66d670667a09bc.tar.gz |
Add in cffi 1.12.2 (e0c7666)
Since this is a mercurial repo, d/led zip of src:
https://bitbucket.org/cffi/cffi/get/v1.12.2.zip
Also add in misc METADATA/NOTICE/Android.bp/etc files.
Bug: 122778810
Test: None
Change-Id: I36c58ed07a2cdd4d9d11831908175a5c988f33c1
Diffstat (limited to 'testing/cffi0/test_ffi_backend.py')
-rw-r--r-- | testing/cffi0/test_ffi_backend.py | 576 |
1 files changed, 576 insertions, 0 deletions
diff --git a/testing/cffi0/test_ffi_backend.py b/testing/cffi0/test_ffi_backend.py new file mode 100644 index 0000000..12ecaee --- /dev/null +++ b/testing/cffi0/test_ffi_backend.py @@ -0,0 +1,576 @@ +import py, sys, platform +import pytest +from testing.cffi0 import backend_tests, test_function, test_ownlib +from testing.support import u +from cffi import FFI +import _cffi_backend + + +class TestFFI(backend_tests.BackendTests, + test_function.TestFunction, + test_ownlib.TestOwnLib): + TypeRepr = "<ctype '%s'>" + + @staticmethod + def Backend(): + return _cffi_backend + + def test_not_supported_bitfield_in_result(self): + ffi = FFI(backend=self.Backend()) + ffi.cdef("struct foo_s { int a,b,c,d,e; int x:1; };") + e = py.test.raises(NotImplementedError, ffi.callback, + "struct foo_s foo(void)", lambda: 42) + assert str(e.value) == ("struct foo_s(*)(): " + "callback with unsupported argument or return type or with '...'") + + def test_inspecttype(self): + ffi = FFI(backend=self.Backend()) + assert ffi.typeof("long").kind == "primitive" + assert ffi.typeof("long(*)(long, long**, ...)").cname == ( + "long(*)(long, long * *, ...)") + assert ffi.typeof("long(*)(long, long**, ...)").ellipsis is True + + def test_new_handle(self): + ffi = FFI(backend=self.Backend()) + o = [2, 3, 4] + p = ffi.new_handle(o) + assert ffi.typeof(p) == ffi.typeof("void *") + assert ffi.from_handle(p) is o + assert ffi.from_handle(ffi.cast("char *", p)) is o + py.test.raises(RuntimeError, ffi.from_handle, ffi.NULL) + + def test_callback_onerror(self): + ffi = FFI(backend=self.Backend()) + seen = [] + def oops(*args): + seen.append(args) + def otherfunc(): + raise LookupError + def cb(n): + otherfunc() + a = ffi.callback("int(*)(int)", cb, error=42, onerror=oops) + res = a(234) + assert res == 42 + assert len(seen) == 1 + exc, val, tb = seen[0] + assert exc is LookupError + assert isinstance(val, LookupError) + assert tb.tb_frame.f_code.co_name == 'cb' + assert tb.tb_frame.f_locals['n'] == 234 + + def test_ffi_new_allocator_2(self): + ffi = FFI(backend=self.Backend()) + seen = [] + def myalloc(size): + seen.append(size) + return ffi.new("char[]", b"X" * size) + def myfree(raw): + seen.append(raw) + alloc1 = ffi.new_allocator(myalloc, myfree) + alloc2 = ffi.new_allocator(alloc=myalloc, free=myfree, + should_clear_after_alloc=False) + p1 = alloc1("int[10]") + p2 = alloc2("int[]", 10) + assert seen == [40, 40] + assert ffi.typeof(p1) == ffi.typeof("int[10]") + assert ffi.sizeof(p1) == 40 + assert ffi.typeof(p2) == ffi.typeof("int[]") + assert ffi.sizeof(p2) == 40 + assert p1[5] == 0 + assert p2[6] == ord('X') * 0x01010101 + raw1 = ffi.cast("char *", p1) + raw2 = ffi.cast("char *", p2) + del p1, p2 + retries = 0 + while len(seen) != 4: + retries += 1 + assert retries <= 5 + import gc; gc.collect() + assert seen == [40, 40, raw1, raw2] + assert repr(seen[2]) == "<cdata 'char[]' owning 41 bytes>" + assert repr(seen[3]) == "<cdata 'char[]' owning 41 bytes>" + + def test_ffi_new_allocator_3(self): + ffi = FFI(backend=self.Backend()) + seen = [] + def myalloc(size): + seen.append(size) + return ffi.new("char[]", b"X" * size) + alloc1 = ffi.new_allocator(myalloc) # no 'free' + p1 = alloc1("int[10]") + assert seen == [40] + assert ffi.typeof(p1) == ffi.typeof("int[10]") + assert ffi.sizeof(p1) == 40 + assert p1[5] == 0 + + def test_ffi_new_allocator_4(self): + ffi = FFI(backend=self.Backend()) + py.test.raises(TypeError, ffi.new_allocator, free=lambda x: None) + # + def myalloc2(size): + raise LookupError + alloc2 = ffi.new_allocator(myalloc2) + py.test.raises(LookupError, alloc2, "int[5]") + # + def myalloc3(size): + return 42 + alloc3 = ffi.new_allocator(myalloc3) + e = py.test.raises(TypeError, alloc3, "int[5]") + assert str(e.value) == "alloc() must return a cdata object (got int)" + # + def myalloc4(size): + return ffi.cast("int", 42) + alloc4 = ffi.new_allocator(myalloc4) + e = py.test.raises(TypeError, alloc4, "int[5]") + assert str(e.value) == "alloc() must return a cdata pointer, not 'int'" + # + def myalloc5(size): + return ffi.NULL + alloc5 = ffi.new_allocator(myalloc5) + py.test.raises(MemoryError, alloc5, "int[5]") + + +class TestBitfield: + def check(self, source, expected_ofs_y, expected_align, expected_size): + # NOTE: 'expected_*' is the numbers expected from GCC. + # The numbers expected from MSVC are not explicitly written + # in this file, and will just be taken from the compiler. + ffi = FFI() + ffi.cdef("struct s1 { %s };" % source) + ctype = ffi.typeof("struct s1") + # verify the information with gcc + ffi1 = FFI() + ffi1.cdef(""" + static const int Gofs_y, Galign, Gsize; + struct s1 *try_with_value(int fieldnum, long long value); + """) + fnames = [name for name, cfield in ctype.fields + if name and cfield.bitsize > 0] + setters = ['case %d: s.%s = value; break;' % iname + for iname in enumerate(fnames)] + lib = ffi1.verify(""" + struct s1 { %s }; + struct sa { char a; struct s1 b; }; + #define Gofs_y offsetof(struct s1, y) + #define Galign offsetof(struct sa, b) + #define Gsize sizeof(struct s1) + struct s1 *try_with_value(int fieldnum, long long value) + { + static struct s1 s; + memset(&s, 0, sizeof(s)); + switch (fieldnum) { %s } + return &s; + } + """ % (source, ' '.join(setters))) + if sys.platform == 'win32': + expected_ofs_y = lib.Gofs_y + expected_align = lib.Galign + expected_size = lib.Gsize + else: + assert (lib.Gofs_y, lib.Galign, lib.Gsize) == ( + expected_ofs_y, expected_align, expected_size) + # the real test follows + assert ffi.offsetof("struct s1", "y") == expected_ofs_y + assert ffi.alignof("struct s1") == expected_align + assert ffi.sizeof("struct s1") == expected_size + # compare the actual storage of the two + for name, cfield in ctype.fields: + if cfield.bitsize < 0 or not name: + continue + if int(ffi.cast(cfield.type, -1)) == -1: # signed + min_value = -(1 << (cfield.bitsize-1)) + max_value = (1 << (cfield.bitsize-1)) - 1 + else: + min_value = 0 + max_value = (1 << cfield.bitsize) - 1 + for t in [1, 2, 4, 8, 16, 128, 2813, 89728, 981729, + -1,-2,-4,-8,-16,-128,-2813,-89728,-981729]: + if min_value <= t <= max_value: + self._fieldcheck(ffi, lib, fnames, name, t) + + def _fieldcheck(self, ffi, lib, fnames, name, value): + s = ffi.new("struct s1 *") + setattr(s, name, value) + assert getattr(s, name) == value + raw1 = ffi.buffer(s)[:] + buff1 = ffi.buffer(s) + t = lib.try_with_value(fnames.index(name), value) + raw2 = ffi.buffer(t, len(raw1))[:] + assert raw1 == raw2 + buff2 = ffi.buffer(t, len(buff1)) + assert buff1 == buff2 + + def test_bitfield_basic(self): + self.check("int a; int b:9; int c:20; int y;", 8, 4, 12) + self.check("int a; short b:9; short c:7; int y;", 8, 4, 12) + self.check("int a; short b:9; short c:9; int y;", 8, 4, 12) + + def test_bitfield_reuse_if_enough_space(self): + self.check("int a:2; char y;", 1, 4, 4) + self.check("int a:1; char b ; int c:1; char y;", 3, 4, 4) + self.check("int a:1; char b:8; int c:1; char y;", 3, 4, 4) + self.check("char a; int b:9; char y;", 3, 4, 4) + self.check("char a; short b:9; char y;", 4, 2, 6) + self.check("int a:2; char b:6; char y;", 1, 4, 4) + self.check("int a:2; char b:7; char y;", 2, 4, 4) + self.check("int a:2; short b:15; char c:2; char y;", 5, 4, 8) + self.check("int a:2; char b:1; char c:1; char y;", 1, 4, 4) + + @pytest.mark.skipif("platform.machine().startswith(('arm', 'aarch64'))") + def test_bitfield_anonymous_no_align(self): + L = FFI().alignof("long long") + self.check("char y; int :1;", 0, 1, 2) + self.check("char x; int z:1; char y;", 2, 4, 4) + self.check("char x; int :1; char y;", 2, 1, 3) + self.check("char x; long long z:48; char y;", 7, L, 8) + self.check("char x; long long :48; char y;", 7, 1, 8) + self.check("char x; long long z:56; char y;", 8, L, 8 + L) + self.check("char x; long long :56; char y;", 8, 1, 9) + self.check("char x; long long z:57; char y;", L + 8, L, L + 8 + L) + self.check("char x; long long :57; char y;", L + 8, 1, L + 9) + + @pytest.mark.skipif( + "not platform.machine().startswith(('arm', 'aarch64'))") + def test_bitfield_anonymous_align_arm(self): + L = FFI().alignof("long long") + self.check("char y; int :1;", 0, 4, 4) + self.check("char x; int z:1; char y;", 2, 4, 4) + self.check("char x; int :1; char y;", 2, 4, 4) + self.check("char x; long long z:48; char y;", 7, L, 8) + self.check("char x; long long :48; char y;", 7, 8, 8) + self.check("char x; long long z:56; char y;", 8, L, 8 + L) + self.check("char x; long long :56; char y;", 8, L, 8 + L) + self.check("char x; long long z:57; char y;", L + 8, L, L + 8 + L) + self.check("char x; long long :57; char y;", L + 8, L, L + 8 + L) + + @pytest.mark.skipif("platform.machine().startswith(('arm', 'aarch64'))") + def test_bitfield_zero(self): + L = FFI().alignof("long long") + self.check("char y; int :0;", 0, 1, 4) + self.check("char x; int :0; char y;", 4, 1, 5) + self.check("char x; int :0; int :0; char y;", 4, 1, 5) + self.check("char x; long long :0; char y;", L, 1, L + 1) + self.check("short x, y; int :0; int :0;", 2, 2, 4) + self.check("char x; int :0; short b:1; char y;", 5, 2, 6) + self.check("int a:1; int :0; int b:1; char y;", 5, 4, 8) + + @pytest.mark.skipif( + "not platform.machine().startswith(('arm', 'aarch64'))") + def test_bitfield_zero_arm(self): + L = FFI().alignof("long long") + self.check("char y; int :0;", 0, 4, 4) + self.check("char x; int :0; char y;", 4, 4, 8) + self.check("char x; int :0; int :0; char y;", 4, 4, 8) + self.check("char x; long long :0; char y;", L, 8, L + 8) + self.check("short x, y; int :0; int :0;", 2, 4, 4) + self.check("char x; int :0; short b:1; char y;", 5, 4, 8) + self.check("int a:1; int :0; int b:1; char y;", 5, 4, 8) + + def test_error_cases(self): + ffi = FFI() + py.test.raises(TypeError, + 'ffi.cdef("struct s1 { float x:1; };"); ffi.new("struct s1 *")') + py.test.raises(TypeError, + 'ffi.cdef("struct s2 { char x:0; };"); ffi.new("struct s2 *")') + py.test.raises(TypeError, + 'ffi.cdef("struct s3 { char x:9; };"); ffi.new("struct s3 *")') + + def test_struct_with_typedef(self): + ffi = FFI() + ffi.cdef("typedef struct { float x; } foo_t;") + p = ffi.new("foo_t *", [5.2]) + assert repr(p).startswith("<cdata 'foo_t *' ") + + def test_struct_array_no_length(self): + ffi = FFI() + ffi.cdef("struct foo_s { int x; int a[]; };") + p = ffi.new("struct foo_s *", [100, [200, 300, 400]]) + assert p.x == 100 + assert ffi.typeof(p.a) is ffi.typeof("int[]") + assert len(p.a) == 3 # length recorded + assert p.a[0] == 200 + assert p.a[1] == 300 + assert p.a[2] == 400 + assert list(p.a) == [200, 300, 400] + q = ffi.cast("struct foo_s *", p) + assert q.x == 100 + assert ffi.typeof(q.a) is ffi.typeof("int *") # no length recorded + py.test.raises(TypeError, len, q.a) + assert q.a[0] == 200 + assert q.a[1] == 300 + assert q.a[2] == 400 + py.test.raises(TypeError, list, q.a) + + @pytest.mark.skipif("sys.platform != 'win32'") + def test_getwinerror(self): + ffi = FFI() + code, message = ffi.getwinerror(1155) + assert code == 1155 + assert message == ("No application is associated with the " + "specified file for this operation") + ffi.cdef("void SetLastError(int);") + lib = ffi.dlopen("Kernel32.dll") + lib.SetLastError(2) + code, message = ffi.getwinerror() + assert code == 2 + assert message == "The system cannot find the file specified" + code, message = ffi.getwinerror(-1) + assert code == 2 + assert message == "The system cannot find the file specified" + + def test_from_buffer(self): + import array + ffi = FFI() + a = array.array('H', [10000, 20000, 30000]) + c = ffi.from_buffer(a) + assert ffi.typeof(c) is ffi.typeof("char[]") + assert len(c) == 6 + ffi.cast("unsigned short *", c)[1] += 500 + assert list(a) == [10000, 20500, 30000] + assert c == ffi.from_buffer("char[]", a, True) + assert c == ffi.from_buffer(a, require_writable=True) + # + c = ffi.from_buffer("unsigned short[]", a) + assert len(c) == 3 + assert c[1] == 20500 + # + p = ffi.from_buffer(b"abcd") + assert p[2] == b"c" + # + assert p == ffi.from_buffer(b"abcd", require_writable=False) + py.test.raises((TypeError, BufferError), ffi.from_buffer, + "char[]", b"abcd", True) + py.test.raises((TypeError, BufferError), ffi.from_buffer, b"abcd", + require_writable=True) + + def test_release(self): + ffi = FFI() + p = ffi.new("int[]", 123) + ffi.release(p) + # here, reading p[0] might give garbage or segfault... + ffi.release(p) # no effect + + def test_memmove(self): + ffi = FFI() + p = ffi.new("short[]", [-1234, -2345, -3456, -4567, -5678]) + ffi.memmove(p, p + 1, 4) + assert list(p) == [-2345, -3456, -3456, -4567, -5678] + p[2] = 999 + ffi.memmove(p + 2, p, 6) + assert list(p) == [-2345, -3456, -2345, -3456, 999] + ffi.memmove(p + 4, ffi.new("char[]", b"\x71\x72"), 2) + if sys.byteorder == 'little': + assert list(p) == [-2345, -3456, -2345, -3456, 0x7271] + else: + assert list(p) == [-2345, -3456, -2345, -3456, 0x7172] + + def test_memmove_buffer(self): + import array + ffi = FFI() + a = array.array('H', [10000, 20000, 30000]) + p = ffi.new("short[]", 5) + ffi.memmove(p, a, 6) + assert list(p) == [10000, 20000, 30000, 0, 0] + ffi.memmove(p + 1, a, 6) + assert list(p) == [10000, 10000, 20000, 30000, 0] + b = array.array('h', [-1000, -2000, -3000]) + ffi.memmove(b, a, 4) + assert b.tolist() == [10000, 20000, -3000] + assert a.tolist() == [10000, 20000, 30000] + p[0] = 999 + p[1] = 998 + p[2] = 997 + p[3] = 996 + p[4] = 995 + ffi.memmove(b, p, 2) + assert b.tolist() == [999, 20000, -3000] + ffi.memmove(b, p + 2, 4) + assert b.tolist() == [997, 996, -3000] + p[2] = -p[2] + p[3] = -p[3] + ffi.memmove(b, p + 2, 6) + assert b.tolist() == [-997, -996, 995] + + def test_memmove_readonly_readwrite(self): + ffi = FFI() + p = ffi.new("signed char[]", 5) + ffi.memmove(p, b"abcde", 3) + assert list(p) == [ord("a"), ord("b"), ord("c"), 0, 0] + ffi.memmove(p, bytearray(b"ABCDE"), 2) + assert list(p) == [ord("A"), ord("B"), ord("c"), 0, 0] + py.test.raises((TypeError, BufferError), ffi.memmove, b"abcde", p, 3) + ba = bytearray(b"xxxxx") + ffi.memmove(dest=ba, src=p, n=3) + assert ba == bytearray(b"ABcxx") + + def test_all_primitives(self): + ffi = FFI() + for name in [ + "char", + "short", + "int", + "long", + "long long", + "signed char", + "unsigned char", + "unsigned short", + "unsigned int", + "unsigned long", + "unsigned long long", + "float", + "double", + "long double", + "wchar_t", + "char16_t", + "char32_t", + "_Bool", + "int8_t", + "uint8_t", + "int16_t", + "uint16_t", + "int32_t", + "uint32_t", + "int64_t", + "uint64_t", + "int_least8_t", + "uint_least8_t", + "int_least16_t", + "uint_least16_t", + "int_least32_t", + "uint_least32_t", + "int_least64_t", + "uint_least64_t", + "int_fast8_t", + "uint_fast8_t", + "int_fast16_t", + "uint_fast16_t", + "int_fast32_t", + "uint_fast32_t", + "int_fast64_t", + "uint_fast64_t", + "intptr_t", + "uintptr_t", + "intmax_t", + "uintmax_t", + "ptrdiff_t", + "size_t", + "ssize_t", + ]: + x = ffi.sizeof(name) + assert 1 <= x <= 16 + + def test_ffi_def_extern(self): + ffi = FFI() + py.test.raises(ValueError, ffi.def_extern) + + def test_introspect_typedef(self): + ffi = FFI() + ffi.cdef("typedef int foo_t;") + assert ffi.list_types() == (['foo_t'], [], []) + assert ffi.typeof('foo_t').kind == 'primitive' + assert ffi.typeof('foo_t').cname == 'int' + # + ffi.cdef("typedef signed char a_t, c_t, g_t, b_t;") + assert ffi.list_types() == (['a_t', 'b_t', 'c_t', 'foo_t', 'g_t'], + [], []) + + def test_introspect_struct(self): + ffi = FFI() + ffi.cdef("struct foo_s { int a; };") + assert ffi.list_types() == ([], ['foo_s'], []) + assert ffi.typeof('struct foo_s').kind == 'struct' + assert ffi.typeof('struct foo_s').cname == 'struct foo_s' + + def test_introspect_union(self): + ffi = FFI() + ffi.cdef("union foo_s { int a; };") + assert ffi.list_types() == ([], [], ['foo_s']) + assert ffi.typeof('union foo_s').kind == 'union' + assert ffi.typeof('union foo_s').cname == 'union foo_s' + + def test_introspect_struct_and_typedef(self): + ffi = FFI() + ffi.cdef("typedef struct { int a; } foo_t;") + assert ffi.list_types() == (['foo_t'], [], []) + assert ffi.typeof('foo_t').kind == 'struct' + assert ffi.typeof('foo_t').cname == 'foo_t' + + def test_introspect_included_type(self): + ffi1 = FFI() + ffi2 = FFI() + ffi1.cdef("typedef signed char schar_t; struct sint_t { int x; };") + ffi2.include(ffi1) + assert ffi1.list_types() == ffi2.list_types() == ( + ['schar_t'], ['sint_t'], []) + + def test_introspect_order(self): + ffi = FFI() + ffi.cdef("union CFFIaaa { int a; }; typedef struct CFFIccc { int a; } CFFIb;") + ffi.cdef("union CFFIg { int a; }; typedef struct CFFIcc { int a; } CFFIbbb;") + ffi.cdef("union CFFIaa { int a; }; typedef struct CFFIa { int a; } CFFIbb;") + assert ffi.list_types() == (['CFFIb', 'CFFIbb', 'CFFIbbb'], + ['CFFIa', 'CFFIcc', 'CFFIccc'], + ['CFFIaa', 'CFFIaaa', 'CFFIg']) + + def test_unpack(self): + ffi = FFI() + p = ffi.new("char[]", b"abc\x00def") + assert ffi.unpack(p+1, 7) == b"bc\x00def\x00" + p = ffi.new("int[]", [-123456789]) + assert ffi.unpack(p, 1) == [-123456789] + + def test_negative_array_size(self): + ffi = FFI() + py.test.raises(ValueError, ffi.cast, "int[-5]", 0) + + def test_cannot_instantiate_manually(self): + ffi = FFI() + ct = type(ffi.typeof("void *")) + py.test.raises(TypeError, ct) + py.test.raises(TypeError, ct, ffi.NULL) + for cd in [type(ffi.cast("void *", 0)), + type(ffi.new("char[]", 3)), + type(ffi.gc(ffi.NULL, lambda x: None))]: + py.test.raises(TypeError, cd) + py.test.raises(TypeError, cd, ffi.NULL) + py.test.raises(TypeError, cd, ffi.typeof("void *")) + + def test_explicitly_defined_char16_t(self): + ffi = FFI() + ffi.cdef("typedef uint16_t char16_t;") + x = ffi.cast("char16_t", 1234) + assert ffi.typeof(x) is ffi.typeof("uint16_t") + + def test_char16_t(self): + ffi = FFI() + x = ffi.new("char16_t[]", 5) + assert len(x) == 5 and ffi.sizeof(x) == 10 + x[2] = u+'\u1324' + assert x[2] == u+'\u1324' + y = ffi.new("char16_t[]", u+'\u1234\u5678') + assert len(y) == 3 + assert list(y) == [u+'\u1234', u+'\u5678', u+'\x00'] + assert ffi.string(y) == u+'\u1234\u5678' + z = ffi.new("char16_t[]", u+'\U00012345') + assert len(z) == 3 + assert list(z) == [u+'\ud808', u+'\udf45', u+'\x00'] + assert ffi.string(z) == u+'\U00012345' + + def test_char32_t(self): + ffi = FFI() + x = ffi.new("char32_t[]", 5) + assert len(x) == 5 and ffi.sizeof(x) == 20 + x[3] = u+'\U00013245' + assert x[3] == u+'\U00013245' + y = ffi.new("char32_t[]", u+'\u1234\u5678') + assert len(y) == 3 + assert list(y) == [u+'\u1234', u+'\u5678', u+'\x00'] + py_uni = u+'\U00012345' + z = ffi.new("char32_t[]", py_uni) + assert len(z) == 2 + assert list(z) == [py_uni, u+'\x00'] # maybe a 2-unichars string + assert ffi.string(z) == py_uni + if len(py_uni) == 1: # 4-bytes unicodes in Python + s = ffi.new("char32_t[]", u+'\ud808\udf00') + assert len(s) == 3 + assert list(s) == [u+'\ud808', u+'\udf00', u+'\x00'] |