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85dec2b8f6
drgn/tests/test_language_c.py
Omar Sandoval 85dec2b8f6 tests: move C-specific tests from test_object to test_language_c 
TestCLiteral, TestCIntegerPromotion, TestCCommonRealType,
TestCOperators, and TestCPretty in test_object all test various
operations on objects, but since they're testing language-specific
behavior, they belong in test_language_c.

Signed-off-by: Omar Sandoval <osandov@osandov.com>
2021-02-21 16:11:19 -08:00

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# Copyright (c) Facebook, Inc. and its affiliates.
# SPDX-License-Identifier: GPL-3.0+
from functools import reduce
import operator
import unittest
from drgn import (
Object,
Qualifiers,
Type,
TypeEnumerator,
TypeMember,
TypeParameter,
cast,
container_of,
)
from tests import MockProgramTestCase
from tests.libdrgn import C_TOKEN, Lexer, drgn_lexer_c
class TestPrettyPrintTypeName(MockProgramTestCase):
def assertTypeName(self, type, expected, same_as_definition=False):
self.assertEqual(type.type_name(), expected)
if same_as_definition:
self.assertEqual(str(type), expected)
def assertQualifiedTypeName(self, expected, same_as_definition, constructor, *args):
self.assertEqual(constructor(*args).type_name(), expected)
qualifiers = [
(Qualifiers.CONST, "const"),
(Qualifiers.VOLATILE, "volatile"),
(Qualifiers.RESTRICT, "restrict"),
(Qualifiers.ATOMIC, "_Atomic"),
]
for qualifier in qualifiers:
t = constructor(*args, qualifiers=qualifier[0])
self.assertTypeName(t, qualifier[1] + " " + expected, same_as_definition)
# All qualifiers.
t = constructor(
*args,
qualifiers=reduce(operator.or_, (qualifier[0] for qualifier in qualifiers)),
)
self.assertTypeName(
t,
" ".join(qualifier[1] for qualifier in qualifiers) + " " + expected,
same_as_definition,
)
def test_void(self):
self.assertQualifiedTypeName("void", True, self.prog.void_type)
def test_int(self):
self.assertQualifiedTypeName("int", True, self.prog.int_type, "int", 4, True)
def test_bool(self):
self.assertQualifiedTypeName("_Bool", True, self.prog.bool_type, "_Bool", 1)
def test_float(self):
self.assertQualifiedTypeName("float", True, self.prog.float_type, "float", 4)
def test_struct(self):
self.assertQualifiedTypeName(
"struct point", True, self.prog.struct_type, "point"
)
self.assertQualifiedTypeName(
"struct <anonymous>", False, self.prog.struct_type, None
)
def test_union(self):
self.assertQualifiedTypeName(
"union option", True, self.prog.union_type, "option"
),
self.assertQualifiedTypeName(
"union <anonymous>", False, self.prog.union_type, None
)
def test_class(self):
self.assertQualifiedTypeName("class coord", True, self.prog.class_type, "coord")
self.assertQualifiedTypeName(
"class <anonymous>", False, self.prog.class_type, None
)
def test_enum(self):
self.assertQualifiedTypeName(
"enum color", True, self.prog.enum_type, "color", None, None
),
self.assertQualifiedTypeName(
"enum <anonymous>", False, self.prog.enum_type, None, None, None
)
def test_typedef(self):
self.assertQualifiedTypeName(
"bool",
False,
self.prog.typedef_type,
"bool",
self.prog.bool_type("_Bool", 1),
)
def test_pointer(self):
self.assertTypeName(
self.prog.pointer_type(self.prog.void_type()), "void *", True
)
t = self.prog.pointer_type(self.prog.void_type(qualifiers=Qualifiers.VOLATILE))
self.assertTypeName(t, "volatile void *", True)
t = self.prog.pointer_type(
self.prog.void_type(qualifiers=Qualifiers.VOLATILE),
qualifiers=Qualifiers.CONST,
)
self.assertTypeName(t, "volatile void * const", True)
t = self.prog.pointer_type(t)
self.assertTypeName(t, "volatile void * const *", True)
def test_array(self):
i = self.prog.int_type("int", 4, True)
self.assertTypeName(self.prog.array_type(i), "int []", True)
self.assertTypeName(self.prog.array_type(i, 2), "int [2]", True)
self.assertTypeName(
self.prog.array_type(self.prog.array_type(i, 3), 2), "int [2][3]", True
)
self.assertTypeName(
self.prog.array_type(
self.prog.array_type(self.prog.array_type(i, 4), 3), 2
),
"int [2][3][4]",
True,
)
def test_array_of_pointers(self):
self.assertTypeName(
self.prog.array_type(
self.prog.array_type(
self.prog.pointer_type(self.prog.int_type("int", 4, True)), 3
),
2,
),
"int *[2][3]",
True,
)
def test_pointer_to_array(self):
self.assertTypeName(
self.prog.pointer_type(
self.prog.array_type(self.prog.int_type("int", 4, True), 2)
),
"int (*)[2]",
True,
)
def test_pointer_to_pointer_to_array(self):
self.assertTypeName(
self.prog.pointer_type(
self.prog.pointer_type(
self.prog.array_type(self.prog.int_type("int", 4, True), 2)
)
),
"int (**)[2]",
True,
)
def test_pointer_to_array_of_pointers(self):
self.assertTypeName(
self.prog.pointer_type(
self.prog.array_type(
self.prog.pointer_type(self.prog.int_type("int", 4, True)), 2
)
),
"int *(*)[2]",
True,
)
def test_array_of_pointers_to_array(self):
self.assertTypeName(
self.prog.array_type(
self.prog.pointer_type(
self.prog.array_type(self.prog.int_type("int", 4, True), 3)
),
2,
),
"int (*[2])[3]",
True,
)
def test_pointer_to_function(self):
i = self.prog.int_type("int", 4, True)
self.assertTypeName(
self.prog.pointer_type(
self.prog.function_type(i, (TypeParameter(i),), False)
),
"int (*)(int)",
True,
)
self.assertTypeName(
self.prog.pointer_type(
self.prog.function_type(i, (TypeParameter(i, "x"),), False)
),
"int (*)(int x)",
True,
)
self.assertTypeName(
self.prog.pointer_type(
self.prog.function_type(
i,
(
TypeParameter(i),
TypeParameter(self.prog.float_type("float", 4)),
),
False,
),
),
"int (*)(int, float)",
True,
)
def test_pointer_to_function_returning_pointer(self):
i = self.prog.int_type("int", 4, True)
self.assertTypeName(
self.prog.pointer_type(
self.prog.function_type(
self.prog.pointer_type(i), (TypeParameter(i),), False
)
),
"int *(*)(int)",
True,
)
self.assertTypeName(
self.prog.pointer_type(
self.prog.function_type(
self.prog.pointer_type(i),
(TypeParameter(self.prog.pointer_type(i)),),
False,
),
),
"int *(*)(int *)",
True,
)
def test_pointer_to_function_returning_pointer_to_const(self):
i = self.prog.int_type("int", 4, True)
self.assertTypeName(
self.prog.pointer_type(
self.prog.function_type(
self.prog.pointer_type(
self.prog.int_type("int", 4, True, qualifiers=Qualifiers.CONST)
),
(TypeParameter(i),),
False,
),
),
"const int *(*)(int)",
True,
)
def test_pointer_to_function_returning_const_pointer(self):
i = self.prog.int_type("int", 4, True)
self.assertTypeName(
self.prog.pointer_type(
self.prog.function_type(
self.prog.pointer_type(i, qualifiers=Qualifiers.CONST),
(TypeParameter(i),),
False,
),
),
"int * const (*)(int)",
True,
)
def test_const_pointer_to_function_returning_pointer(self):
i = self.prog.int_type("int", 4, True)
self.assertTypeName(
self.prog.pointer_type(
self.prog.function_type(
self.prog.pointer_type(i), (TypeParameter(i),), False
),
qualifiers=Qualifiers.CONST,
),
"int *(* const)(int)",
True,
)
def test_array_of_pointers_to_functions(self):
i = self.prog.int_type("int", 4, True)
self.assertTypeName(
self.prog.array_type(
self.prog.pointer_type(
self.prog.function_type(i, (TypeParameter(i),), False)
),
4,
),
"int (*[4])(int)",
True,
)
def test_array_of_const_pointers_to_functions(self):
i = self.prog.int_type("int", 4, True)
self.assertTypeName(
self.prog.array_type(
self.prog.pointer_type(
self.prog.function_type(i, (TypeParameter(i),), False),
qualifiers=Qualifiers.CONST,
),
),
"int (* const [])(int)",
True,
)
def test_pointer_to_variadic_function(self):
i = self.prog.int_type("int", 4, True)
self.assertTypeName(
self.prog.pointer_type(
self.prog.function_type(i, (TypeParameter(i),), True)
),
"int (*)(int, ...)",
True,
)
def test_pointer_to_function_with_no_parameters(self):
self.assertTypeName(
self.prog.pointer_type(
self.prog.function_type(self.prog.int_type("int", 4, True), (), False)
),
"int (*)(void)",
True,
)
def test_pointer_to_function_with_no_parameter_specification(self):
self.assertTypeName(
self.prog.pointer_type(
self.prog.function_type(self.prog.int_type("int", 4, True), (), True)
),
"int (*)()",
True,
)
def test_function(self):
self.assertTypeName(
self.prog.function_type(self.prog.int_type("int", 4, True), (), False),
"int (void)",
)
class TestPrettyPrintType(MockProgramTestCase):
def assertPrettyPrint(self, type, expected):
self.assertEqual(str(type), expected)
def test_struct(self):
self.assertPrettyPrint(
self.point_type,
"""\
struct point {
int x;
int y;
}""",
)
def test_struct_member(self):
self.assertPrettyPrint(
self.line_segment_type,
"""\
struct line_segment {
struct point a;
struct point b;
}""",
)
def test_anonymous_struct(self):
self.assertPrettyPrint(
self.prog.struct_type(
None,
8,
(
TypeMember(self.prog.int_type("int", 4, True), "x", 0),
TypeMember(self.prog.int_type("int", 4, True), "y", 32),
),
),
"""\
struct {
int x;
int y;
}""",
)
def test_anonymous_struct_member(self):
# Member with anonymous struct type.
anonymous_struct = self.prog.struct_type(
None,
8,
(
TypeMember(self.prog.int_type("int", 4, True), "x", 0),
TypeMember(self.prog.int_type("int", 4, True), "y", 32),
),
)
self.assertPrettyPrint(
self.prog.struct_type(
"line_segment",
16,
(
TypeMember(anonymous_struct, "a", 0),
TypeMember(anonymous_struct, "b", 64),
),
),
"""\
struct line_segment {
struct {
int x;
int y;
} a;
struct {
int x;
int y;
} b;
}""",
)
def test_struct_unnamed_member(self):
self.assertPrettyPrint(
self.prog.struct_type(
"point3",
0,
(
TypeMember(
self.prog.struct_type(
None,
8,
(
TypeMember(self.prog.int_type("int", 4, True), "x"),
TypeMember(self.prog.int_type("int", 4, True), "y", 32),
),
)
),
TypeMember(self.prog.int_type("int", 4, True), "z", 64),
),
),
"""\
struct point3 {
struct {
int x;
int y;
};
int z;
}""",
)
def test_bit_field(self):
self.assertPrettyPrint(
self.prog.struct_type(
"point",
4,
(
TypeMember(
Object(
self.prog,
self.prog.int_type("int", 4, True),
bit_field_size=4,
),
"x",
0,
),
TypeMember(
Object(
self.prog,
self.prog.int_type("int", 4, True),
bit_field_size=8,
),
"y",
4,
),
),
),
"""\
struct point {
int x : 4;
int y : 8;
}""",
)
def test_union(self):
self.assertPrettyPrint(
self.prog.union_type(
"foo",
4,
(
TypeMember(self.prog.int_type("int", 4, True), "i"),
TypeMember(
self.prog.array_type(
self.prog.int_type("unsigned char", 1, False), 4
),
"a",
),
),
),
"""\
union foo {
int i;
unsigned char a[4];
}""",
)
def test_union_qualified(self):
self.assertPrettyPrint(
self.prog.union_type(
"foo",
4,
(
TypeMember(self.prog.int_type("int", 4, True), "i"),
TypeMember(
self.prog.array_type(
self.prog.int_type("unsigned char", 1, False), 4
),
"a",
),
),
qualifiers=Qualifiers.CONST,
),
"""\
const union foo {
int i;
unsigned char a[4];
}""",
)
def test_class(self):
self.assertPrettyPrint(
self.coord_type,
"""\
class coord {
int x;
int y;
int z;
}""",
)
def test_enum(self):
self.assertPrettyPrint(
self.color_type,
"""\
enum color {
RED = 0,
GREEN = 1,
BLUE = 2,
}""",
)
def test_enum_qualified(self):
self.assertPrettyPrint(
self.color_type.qualified(Qualifiers.CONST),
"""\
const enum color {
RED = 0,
GREEN = 1,
BLUE = 2,
}""",
)
def test_enum_anonymous(self):
self.assertPrettyPrint(
self.prog.enum_type(
None,
self.prog.int_type("int", 4, True),
(
TypeEnumerator("RED", 0),
TypeEnumerator("GREEN", -1),
TypeEnumerator("BLUE", -2),
),
),
"""\
enum {
RED = 0,
GREEN = -1,
BLUE = -2,
}""",
)
def test_typedef(self):
self.assertPrettyPrint(
self.prog.typedef_type("INT", self.prog.int_type("int", 4, True)),
"typedef int INT",
)
def test_typedef_const(self):
self.assertPrettyPrint(
self.prog.typedef_type(
"CINT", self.prog.int_type("int", 4, True, qualifiers=Qualifiers.CONST)
),
"typedef const int CINT",
)
def test_const_typedef(self):
self.assertPrettyPrint(
self.prog.typedef_type(
"INT", self.prog.int_type("int", 4, True), qualifiers=Qualifiers.CONST
),
"const typedef int INT",
)
def test_typedef_pointer(self):
self.assertPrettyPrint(
self.prog.typedef_type(
"string", self.prog.pointer_type(self.prog.int_type("char", 1, True))
),
"typedef char *string",
)
def test_typedef_struct(self):
self.assertPrettyPrint(
self.prog.typedef_type(
"Point",
self.prog.struct_type(
None,
8,
(
TypeMember(self.prog.int_type("int", 4, True), "x", 0),
TypeMember(self.prog.int_type("int", 4, True), "y", 32),
),
),
),
"""\
typedef struct {
int x;
int y;
} Point""",
)
def test_typedef_function(self):
self.assertPrettyPrint(
self.prog.typedef_type(
"fn",
self.prog.function_type(self.prog.int_type("int", 4, True), (), False),
),
"typedef int fn(void)",
)
def test_function_no_name(self):
self.assertRaisesRegex(
ValueError,
"function must have name",
str,
self.prog.struct_type(
"foo",
8,
(
TypeMember(
self.prog.function_type(
self.prog.int_type("int", 4, True), (), False
)
),
),
),
)
class TestLexer(unittest.TestCase):
def lex(self, s):
lexer = Lexer(drgn_lexer_c, s)
while True:
token = lexer.pop()
if token.kind == C_TOKEN.EOF:
break
yield token
def test_empty(self):
lexer = Lexer(drgn_lexer_c, "")
for i in range(64):
self.assertEqual(lexer.pop().kind, C_TOKEN.EOF)
def test_symbols(self):
s = "()[]*."
tokens = [
C_TOKEN.LPAREN,
C_TOKEN.RPAREN,
C_TOKEN.LBRACKET,
C_TOKEN.RBRACKET,
C_TOKEN.ASTERISK,
C_TOKEN.DOT,
]
self.assertEqual([token.kind for token in self.lex(s)], tokens)
def test_keywords(self):
s = """void char short int long signed unsigned _Bool float double
_Complex const restrict volatile _Atomic struct union enum"""
tokens = [
C_TOKEN.VOID,
C_TOKEN.CHAR,
C_TOKEN.SHORT,
C_TOKEN.INT,
C_TOKEN.LONG,
C_TOKEN.SIGNED,
C_TOKEN.UNSIGNED,
C_TOKEN.BOOL,
C_TOKEN.FLOAT,
C_TOKEN.DOUBLE,
C_TOKEN.COMPLEX,
C_TOKEN.CONST,
C_TOKEN.RESTRICT,
C_TOKEN.VOLATILE,
C_TOKEN.ATOMIC,
C_TOKEN.STRUCT,
C_TOKEN.UNION,
C_TOKEN.ENUM,
]
self.assertEqual([token.kind for token in self.lex(s)], tokens)
def test_identifiers(self):
s = "_ x foo _bar baz1"
tokens = s.split()
self.assertEqual(
[(token.kind, token.value) for token in self.lex(s)],
[(C_TOKEN.IDENTIFIER, value) for value in tokens],
)
def test_number(self):
s = "0 1234 0xdeadbeef"
tokens = s.split()
self.assertEqual(
[(token.kind, token.value) for token in self.lex(s)],
[(C_TOKEN.NUMBER, value) for value in tokens],
)
def test_invalid_number(self):
for s in ["0x", "1234y"]:
self.assertRaisesRegex(SyntaxError, "invalid number", list, self.lex(s))
def test_invalid_character(self):
self.assertRaisesRegex(SyntaxError, "invalid character", list, self.lex("@"))
class TestLiteral(MockProgramTestCase):
def test_int(self):
self.assertIdentical(
Object(self.prog, value=1), Object(self.prog, "int", value=1)
)
self.assertIdentical(
Object(self.prog, value=-1), Object(self.prog, "int", value=-1)
)
self.assertIdentical(
Object(self.prog, value=2 ** 31 - 1),
Object(self.prog, "int", value=2 ** 31 - 1),
)
self.assertIdentical(
Object(self.prog, value=2 ** 31), Object(self.prog, "long", value=2 ** 31)
)
# Not int, because this is treated as the negation operator applied to
# 2**31.
self.assertIdentical(
Object(self.prog, value=-(2 ** 31)),
Object(self.prog, "long", value=-(2 ** 31)),
)
self.assertIdentical(
Object(self.prog, value=2 ** 63),
Object(self.prog, "unsigned long long", value=2 ** 63),
)
self.assertIdentical(
Object(self.prog, value=2 ** 64 - 1),
Object(self.prog, "unsigned long long", value=2 ** 64 - 1),
)
self.assertIdentical(
Object(self.prog, value=-(2 ** 64 - 1)),
Object(self.prog, "unsigned long long", value=1),
)
def test_bool(self):
self.assertIdentical(
Object(self.prog, value=True), Object(self.prog, "int", value=1)
)
self.assertIdentical(
Object(self.prog, value=False), Object(self.prog, "int", value=0)
)
def test_float(self):
self.assertIdentical(
Object(self.prog, value=3.14), Object(self.prog, "double", value=3.14)
)
def test_invalid(self):
class Foo:
pass
self.assertRaisesRegex(
TypeError, "cannot create Foo literal", Object, self.prog, value=Foo()
)
class TestIntegerPromotion(MockProgramTestCase):
def test_conversion_rank_less_than_int(self):
self.assertIdentical(+self.bool(False), self.int(0))
self.assertIdentical(
+Object(self.prog, "char", value=1), Object(self.prog, "int", value=1)
)
self.assertIdentical(
+Object(self.prog, "signed char", value=2),
Object(self.prog, "int", value=2),
)
self.assertIdentical(
+Object(self.prog, "unsigned char", value=3),
Object(self.prog, "int", value=3),
)
self.assertIdentical(
+Object(self.prog, "short", value=1), Object(self.prog, "int", value=1)
)
self.assertIdentical(
+Object(self.prog, "unsigned short", value=2),
Object(self.prog, "int", value=2),
)
# If short is the same size as int, then int can't represent all of the
# values of unsigned short.
self.assertIdentical(
+Object(self.prog, self.prog.int_type("short", 4, True), value=1),
Object(self.prog, "int", value=1),
)
self.assertIdentical(
+Object(self.prog, self.prog.int_type("unsigned short", 4, False), value=2),
Object(self.prog, "unsigned int", value=2),
)
def test_int(self):
self.assertIdentical(
+Object(self.prog, "int", value=-1), Object(self.prog, "int", value=-1)
)
self.assertIdentical(
+Object(self.prog, "unsigned int", value=-1),
Object(self.prog, "unsigned int", value=-1),
)
def test_conversion_rank_greater_than_int(self):
self.assertIdentical(
+Object(self.prog, "long", value=-1), Object(self.prog, "long", value=-1)
)
self.assertIdentical(
+Object(self.prog, "unsigned long", value=-1),
Object(self.prog, "unsigned long", value=-1),
)
self.assertIdentical(
+Object(self.prog, "long long", value=-1),
Object(self.prog, "long long", value=-1),
)
self.assertIdentical(
+Object(self.prog, "unsigned long long", value=-1),
Object(self.prog, "unsigned long long", value=-1),
)
def test_extended_integer(self):
self.assertIdentical(
+Object(self.prog, self.prog.int_type("byte", 1, True), value=1),
Object(self.prog, "int", value=1),
)
self.assertIdentical(
+Object(self.prog, self.prog.int_type("ubyte", 1, False), value=-1),
Object(self.prog, "int", value=0xFF),
)
self.assertIdentical(
+Object(self.prog, self.prog.int_type("qword", 8, True), value=1),
Object(self.prog, self.prog.int_type("qword", 8, True), value=1),
)
self.assertIdentical(
+Object(self.prog, self.prog.int_type("qword", 8, False), value=1),
Object(self.prog, self.prog.int_type("qword", 8, False), value=1),
)
def test_bit_field(self):
# Bit fields which can be represented by int or unsigned int should be
# promoted.
self.assertIdentical(
+Object(self.prog, "int", value=1, bit_field_size=4),
Object(self.prog, "int", value=1),
)
self.assertIdentical(
+Object(self.prog, "long", value=1, bit_field_size=4),
Object(self.prog, "int", value=1),
)
self.assertIdentical(
+Object(self.prog, "int", value=1, bit_field_size=32),
Object(self.prog, "int", value=1),
)
self.assertIdentical(
+Object(self.prog, "long", value=1, bit_field_size=32),
Object(self.prog, "int", value=1),
)
self.assertIdentical(
+Object(self.prog, "unsigned int", value=1, bit_field_size=4),
Object(self.prog, "int", value=1),
)
self.assertIdentical(
+Object(self.prog, "unsigned long", value=1, bit_field_size=4),
Object(self.prog, "int", value=1),
)
self.assertIdentical(
+Object(self.prog, "unsigned int", value=1, bit_field_size=32),
Object(self.prog, "unsigned int", value=1),
)
self.assertIdentical(
+Object(self.prog, "unsigned long", value=1, bit_field_size=32),
Object(self.prog, "unsigned int", value=1),
)
# Bit fields which cannot be represented by int or unsigned int should
# be preserved.
self.assertIdentical(
+Object(self.prog, "long", value=1, bit_field_size=40),
Object(self.prog, "long", value=1, bit_field_size=40),
)
self.assertIdentical(
+Object(self.prog, "unsigned long", value=1, bit_field_size=40),
Object(self.prog, "unsigned long", value=1, bit_field_size=40),
)
def test_enum(self):
# Enums should be converted to their compatible type and then promoted.
self.assertIdentical(
+Object(self.prog, self.color_type, value=1),
Object(self.prog, "unsigned int", value=1),
)
type_ = self.prog.enum_type(
"color",
self.prog.type("unsigned long long"),
(
TypeEnumerator("RED", 0),
TypeEnumerator("GREEN", 1),
TypeEnumerator("BLUE", 2),
),
)
self.assertIdentical(
+Object(self.prog, type_, value=1),
Object(self.prog, "unsigned long long", value=1),
)
type_ = self.prog.enum_type(
"color",
self.prog.type("char"),
(
TypeEnumerator("RED", 0),
TypeEnumerator("GREEN", 1),
TypeEnumerator("BLUE", 2),
),
)
self.assertIdentical(
+Object(self.prog, type_, value=1), Object(self.prog, "int", value=1)
)
def test_typedef(self):
type_ = self.prog.typedef_type("SHORT", self.prog.type("short"))
self.assertIdentical(
+Object(self.prog, type_, value=5), Object(self.prog, "int", value=5)
)
# Typedef should be preserved if the type wasn't promoted.
type_ = self.prog.typedef_type("CINT", self.prog.type("int"))
self.assertIdentical(
+Object(self.prog, type_, value=5), Object(self.prog, type_, value=5)
)
def test_non_integer(self):
# Non-integer types should not be affected.
self.assertIdentical(
+Object(self.prog, "double", value=3.14),
Object(self.prog, "double", value=3.14),
)
def test_byte_order(self):
# Types in the opposite byte order should converted to the program's
# byte order.
self.assertIdentical(
+Object(self.prog, self.prog.int_type("int", 4, True, "big"), value=5),
Object(self.prog, self.prog.int_type("int", 4, True, "little"), value=5),
)
def test_byte_order_typedef(self):
self.assertIdentical(
+Object(
self.prog,
self.prog.typedef_type(
"CINT", self.prog.int_type("int", 4, True, "big")
),
value=5,
),
Object(
self.prog,
self.prog.typedef_type(
"CINT", self.prog.int_type("int", 4, True, "little")
),
value=5,
),
)
def test_byte_order_enum(self):
self.assertIdentical(
+Object(
self.prog,
self.prog.enum_type(
"ENUM", self.prog.int_type("int", 4, True, "big"), ()
),
value=5,
),
Object(self.prog, self.prog.int_type("int", 4, True, "little"), value=5),
)
class TestCommonRealType(MockProgramTestCase):
def assertCommonRealType(self, lhs, rhs, expected, commutative=True):
if isinstance(lhs, (str, Type)):
obj1 = Object(self.prog, lhs, value=1)
else:
obj1 = Object(self.prog, lhs[0], value=1, bit_field_size=lhs[1])
if isinstance(rhs, (str, Type)):
obj2 = Object(self.prog, rhs, value=1)
else:
obj2 = Object(self.prog, rhs[0], value=1, bit_field_size=rhs[1])
if isinstance(expected, (str, Type)):
expected_obj = Object(self.prog, expected, value=1)
else:
expected_obj = Object(
self.prog, expected[0], value=1, bit_field_size=expected[1]
)
self.assertIdentical(obj1 * obj2, expected_obj)
if commutative:
self.assertIdentical(obj2 * obj1, expected_obj)
def test_float(self):
self.assertCommonRealType("float", "long long", "float")
self.assertCommonRealType("float", "float", "float")
self.assertCommonRealType("double", "long long", "double")
self.assertCommonRealType("double", "float", "double")
self.assertCommonRealType("double", "double", "double")
# Floating type not in the standard.
float64 = self.prog.float_type("float64", 8)
self.assertCommonRealType(float64, "long long", float64)
self.assertCommonRealType(float64, "float", float64)
self.assertCommonRealType(float64, "double", float64)
self.assertCommonRealType(float64, float64, float64)
def test_bit_field(self):
# Same width and sign.
self.assertCommonRealType(
("long long", 33), ("long long", 33), ("long long", 33)
)
self.assertCommonRealType(
("long long", 33), ("long", 33), ("long", 33), commutative=False
)
self.assertCommonRealType(
("long", 33), ("long long", 33), ("long long", 33), commutative=False
)
# Same width, different sign.
self.assertCommonRealType(
("long long", 33), ("unsigned long long", 33), ("unsigned long long", 33)
)
# Different width, same sign.
self.assertCommonRealType(
("long long", 34), ("long long", 33), ("long long", 34)
)
# Different width, different sign.
self.assertCommonRealType(
("long long", 34), ("unsigned long long", 33), ("long long", 34)
)
def test_same(self):
self.assertCommonRealType("_Bool", "_Bool", "int")
self.assertCommonRealType("int", "int", "int")
self.assertCommonRealType("long", "long", "long")
def test_same_sign(self):
self.assertCommonRealType("long", "int", "long")
self.assertCommonRealType("long long", "int", "long long")
self.assertCommonRealType("long long", "long", "long long")
self.assertCommonRealType("unsigned long", "unsigned int", "unsigned long")
self.assertCommonRealType(
"unsigned long long", "unsigned int", "unsigned long long"
)
self.assertCommonRealType(
"unsigned long long", "unsigned long", "unsigned long long"
)
int64 = self.prog.int_type("int64", 8, True)
qword = self.prog.int_type("qword", 8, True)
self.assertCommonRealType("long", int64, "long")
self.assertCommonRealType(int64, qword, qword, commutative=False)
self.assertCommonRealType(qword, int64, int64, commutative=False)
self.assertCommonRealType("int", int64, int64)
def test_unsigned_greater_rank(self):
self.assertCommonRealType("unsigned long", "int", "unsigned long")
self.assertCommonRealType("unsigned long long", "long", "unsigned long long")
self.assertCommonRealType("unsigned long long", "int", "unsigned long long")
int64 = self.prog.int_type("int64", 8, True)
uint64 = self.prog.int_type("uint64", 8, False)
self.assertCommonRealType(uint64, "int", uint64)
self.assertCommonRealType("unsigned long", int64, "unsigned long")
def test_signed_can_represent_unsigned(self):
self.assertCommonRealType("long", "unsigned int", "long")
self.assertCommonRealType("long long", "unsigned int", "long long")
int64 = self.prog.int_type("int64", 8, True)
weirduint = self.prog.int_type("weirduint", 6, False)
self.assertCommonRealType(int64, "unsigned int", int64)
self.assertCommonRealType("long", weirduint, "long")
def test_corresponding_unsigned(self):
self.assertCommonRealType("long", "unsigned long", "unsigned long")
self.assertCommonRealType("long long", "unsigned long", "unsigned long long")
def test_enum(self):
self.assertCommonRealType(self.color_type, self.color_type, "unsigned int")
def test_typedef(self):
type_ = self.prog.typedef_type("INT", self.prog.type("int"))
self.assertCommonRealType(type_, type_, type_)
self.assertCommonRealType("int", type_, type_, commutative=False)
self.assertCommonRealType(type_, "int", "int", commutative=False)
type_ = self.prog.typedef_type("LONG", self.prog.type("long"))
self.assertCommonRealType(type_, "int", type_)
class TestOperators(MockProgramTestCase):
def test_cast_array(self):
obj = Object(self.prog, "int []", address=0xFFFF0000)
self.assertIdentical(
cast("int *", obj), Object(self.prog, "int *", value=0xFFFF0000)
)
self.assertIdentical(
cast("void *", obj), Object(self.prog, "void *", value=0xFFFF0000)
)
self.assertIdentical(
cast("unsigned long", obj),
Object(self.prog, "unsigned long", value=0xFFFF0000),
)
self.assertRaisesRegex(
TypeError, r"cannot cast to 'int \[2]'", cast, "int [2]", obj
)
def test_cast_function(self):
func = Object(
self.prog,
self.prog.function_type(self.prog.void_type(), (), False),
address=0xFFFF0000,
)
self.assertIdentical(
cast("void *", func), Object(self.prog, "void *", value=0xFFFF0000)
)
def _test_arithmetic(
self, op, lhs, rhs, result, integral=True, floating_point=False
):
if integral:
self.assertIdentical(op(self.int(lhs), self.int(rhs)), self.int(result))
self.assertIdentical(op(self.int(lhs), self.long(rhs)), self.long(result))
self.assertIdentical(op(self.long(lhs), self.int(rhs)), self.long(result))
self.assertIdentical(op(self.long(lhs), self.long(rhs)), self.long(result))
self.assertIdentical(op(self.int(lhs), rhs), self.int(result))
self.assertIdentical(op(self.long(lhs), rhs), self.long(result))
self.assertIdentical(op(lhs, self.int(rhs)), self.int(result))
self.assertIdentical(op(lhs, self.long(rhs)), self.long(result))
if floating_point:
self.assertIdentical(
op(self.double(lhs), self.double(rhs)), self.double(result)
)
self.assertIdentical(
op(self.double(lhs), self.int(rhs)), self.double(result)
)
self.assertIdentical(
op(self.int(lhs), self.double(rhs)), self.double(result)
)
self.assertIdentical(op(self.double(lhs), float(rhs)), self.double(result))
self.assertIdentical(op(float(lhs), self.double(rhs)), self.double(result))
self.assertIdentical(op(float(lhs), self.int(rhs)), self.double(result))
self.assertIdentical(op(self.int(lhs), float(rhs)), self.double(result))
def _test_shift(self, op, lhs, rhs, result):
self.assertIdentical(op(self.int(lhs), self.int(rhs)), self.int(result))
self.assertIdentical(op(self.int(lhs), self.long(rhs)), self.int(result))
self.assertIdentical(op(self.long(lhs), self.int(rhs)), self.long(result))
self.assertIdentical(op(self.long(lhs), self.long(rhs)), self.long(result))
self.assertIdentical(op(self.int(lhs), rhs), self.int(result))
self.assertIdentical(op(self.long(lhs), rhs), self.long(result))
self.assertIdentical(op(lhs, self.int(rhs)), self.int(result))
self.assertIdentical(op(lhs, self.long(rhs)), self.int(result))
self._test_pointer_type_errors(op)
self._test_floating_type_errors(op)
def _test_pointer_type_errors(self, op):
def pointer(value):
return Object(self.prog, "int *", value=value)
self.assertRaisesRegex(
TypeError, "invalid operands to binary", op, self.int(1), pointer(1)
)
self.assertRaisesRegex(
TypeError, "invalid operands to binary", op, pointer(1), self.int(1)
)
self.assertRaisesRegex(
TypeError, "invalid operands to binary", op, pointer(1), pointer(1)
)
def _test_floating_type_errors(self, op):
self.assertRaises(TypeError, op, self.int(1), self.double(1))
self.assertRaises(TypeError, op, self.double(1), self.int(1))
self.assertRaises(TypeError, op, self.double(1), self.double(1))
def test_relational(self):
one = self.int(1)
two = self.int(2)
three = self.int(3)
self.assertTrue(one < two)
self.assertFalse(two < two)
self.assertFalse(three < two)
self.assertTrue(one <= two)
self.assertTrue(two <= two)
self.assertFalse(three <= two)
self.assertTrue(one == one)
self.assertFalse(one == two)
self.assertFalse(one != one)
self.assertTrue(one != two)
self.assertFalse(one > two)
self.assertFalse(two > two)
self.assertTrue(three > two)
self.assertFalse(one >= two)
self.assertTrue(two >= two)
self.assertTrue(three >= two)
# The usual arithmetic conversions convert -1 to an unsigned int.
self.assertFalse(self.int(-1) < self.unsigned_int(0))
self.assertTrue(self.int(1) == self.bool(1))
def test_ptr_relational(self):
ptr0 = Object(self.prog, "int *", value=0xFFFF0000)
ptr1 = Object(self.prog, "int *", value=0xFFFF0004)
fptr1 = Object(self.prog, "float *", value=0xFFFF0004)
self.assertTrue(ptr0 < ptr1)
self.assertTrue(ptr0 < fptr1)
self.assertFalse(ptr1 < fptr1)
self.assertTrue(ptr0 <= ptr1)
self.assertTrue(ptr0 <= fptr1)
self.assertTrue(ptr1 <= fptr1)
self.assertFalse(ptr0 == ptr1)
self.assertFalse(ptr0 == fptr1)
self.assertTrue(ptr1 == fptr1)
self.assertTrue(ptr0 != ptr1)
self.assertTrue(ptr0 != fptr1)
self.assertFalse(ptr1 != fptr1)
self.assertFalse(ptr0 > ptr1)
self.assertFalse(ptr0 > fptr1)
self.assertFalse(ptr1 > fptr1)
self.assertFalse(ptr0 >= ptr1)
self.assertFalse(ptr0 >= fptr1)
self.assertTrue(ptr1 >= fptr1)
self.assertRaises(TypeError, operator.lt, ptr0, self.int(1))
func = Object(
self.prog,
self.prog.function_type(self.prog.void_type(), (), False),
address=0xFFFF0000,
)
self.assertTrue(func == func)
self.assertTrue(func == ptr0)
array = Object(self.prog, "int [8]", address=0xFFFF0000)
self.assertTrue(array == array)
self.assertTrue(array != ptr1)
incomplete = Object(self.prog, "int []", address=0xFFFF0000)
self.assertTrue(incomplete == incomplete)
self.assertTrue(incomplete == ptr0)
self.assertRaises(
TypeError,
operator.eq,
Object(
self.prog, self.prog.struct_type("foo", None, None), address=0xFFFF0000
),
ptr0,
)
def test_add(self):
self._test_arithmetic(operator.add, 1, 2, 3, floating_point=True)
ptr = Object(self.prog, "int *", value=0xFFFF0000)
arr = Object(self.prog, "int [2]", address=0xFFFF0000)
ptr1 = Object(self.prog, "int *", value=0xFFFF0004)
self.assertIdentical(ptr + self.int(1), ptr1)
self.assertIdentical(self.unsigned_int(1) + ptr, ptr1)
self.assertIdentical(arr + self.int(1), ptr1)
self.assertIdentical(ptr1 + self.int(-1), ptr)
self.assertIdentical(self.int(-1) + ptr1, ptr)
self.assertIdentical(ptr + 1, ptr1)
self.assertIdentical(1 + ptr, ptr1)
self.assertRaises(TypeError, operator.add, ptr, ptr)
self.assertRaises(TypeError, operator.add, ptr, 2.0)
self.assertRaises(TypeError, operator.add, 2.0, ptr)
void_ptr = Object(self.prog, "void *", value=0xFFFF0000)
void_ptr1 = Object(self.prog, "void *", value=0xFFFF0001)
self.assertIdentical(void_ptr + self.int(1), void_ptr1)
self.assertIdentical(self.unsigned_int(1) + void_ptr, void_ptr1)
self.assertIdentical(void_ptr + 1, void_ptr1)
self.assertIdentical(1 + void_ptr, void_ptr1)
def test_sub(self):
self._test_arithmetic(operator.sub, 4, 2, 2, floating_point=True)
ptr = Object(self.prog, "int *", value=0xFFFF0000)
arr = Object(self.prog, "int [2]", address=0xFFFF0004)
ptr1 = Object(self.prog, "int *", value=0xFFFF0004)
self.assertIdentical(ptr1 - ptr, Object(self.prog, "ptrdiff_t", value=1))
self.assertIdentical(ptr - ptr1, Object(self.prog, "ptrdiff_t", value=-1))
self.assertIdentical(ptr - self.int(0), ptr)
self.assertIdentical(ptr1 - self.int(1), ptr)
self.assertIdentical(arr - self.int(1), ptr)
self.assertRaises(TypeError, operator.sub, self.int(1), ptr)
self.assertRaises(TypeError, operator.sub, ptr, 1.0)
void_ptr = Object(self.prog, "void *", value=0xFFFF0000)
void_ptr1 = Object(self.prog, "void *", value=0xFFFF0001)
self.assertIdentical(
void_ptr1 - void_ptr, Object(self.prog, "ptrdiff_t", value=1)
)
self.assertIdentical(
void_ptr - void_ptr1, Object(self.prog, "ptrdiff_t", value=-1)
)
self.assertIdentical(void_ptr - self.int(0), void_ptr)
self.assertIdentical(void_ptr1 - self.int(1), void_ptr)
def test_mul(self):
self._test_arithmetic(operator.mul, 2, 3, 6, floating_point=True)
self._test_pointer_type_errors(operator.mul)
# Negative numbers.
self.assertIdentical(self.int(2) * self.int(-3), self.int(-6))
self.assertIdentical(self.int(-2) * self.int(3), self.int(-6))
self.assertIdentical(self.int(-2) * self.int(-3), self.int(6))
# Integer overflow.
self.assertIdentical(self.int(0x8000) * self.int(0x10000), self.int(-(2 ** 31)))
self.assertIdentical(
self.unsigned_int(0x8000) * self.int(0x10000), self.unsigned_int(2 ** 31)
)
self.assertIdentical(
self.unsigned_int(0xFFFFFFFF) * self.unsigned_int(0xFFFFFFFF),
self.unsigned_int(1),
)
self.assertIdentical(
self.unsigned_int(0xFFFFFFFF) * self.int(-1), self.unsigned_int(1)
)
def test_div(self):
self._test_arithmetic(operator.truediv, 6, 3, 2, floating_point=True)
# Make sure we do integer division for integer operands.
self._test_arithmetic(operator.truediv, 3, 2, 1)
# Make sure we truncate towards zero (Python truncates towards negative
# infinity).
self._test_arithmetic(operator.truediv, -1, 2, 0)
self._test_arithmetic(operator.truediv, 1, -2, 0)
self.assertRaises(ZeroDivisionError, operator.truediv, self.int(1), self.int(0))
self.assertRaises(
ZeroDivisionError,
operator.truediv,
self.unsigned_int(1),
self.unsigned_int(0),
)
self.assertRaises(
ZeroDivisionError, operator.truediv, self.double(1), self.double(0)
)
self._test_pointer_type_errors(operator.truediv)
def test_mod(self):
self._test_arithmetic(operator.mod, 4, 2, 0)
# Make sure the modulo result has the sign of the dividend (Python uses
# the sign of the divisor).
self._test_arithmetic(operator.mod, 1, 26, 1)
self._test_arithmetic(operator.mod, 1, -26, 1)
self._test_arithmetic(operator.mod, -1, 26, -1)
self._test_arithmetic(operator.mod, -1, -26, -1)
self.assertRaises(ZeroDivisionError, operator.mod, self.int(1), self.int(0))
self.assertRaises(
ZeroDivisionError, operator.mod, self.unsigned_int(1), self.unsigned_int(0)
)
self._test_pointer_type_errors(operator.mod)
self._test_floating_type_errors(operator.mod)
def test_lshift(self):
self._test_shift(operator.lshift, 2, 3, 16)
self.assertIdentical(self.bool(True) << self.bool(True), self.int(2))
self.assertIdentical(self.int(1) << self.int(32), self.int(0))
def test_rshift(self):
self._test_shift(operator.rshift, 16, 3, 2)
self.assertIdentical(self.int(-2) >> self.int(1), self.int(-1))
self.assertIdentical(self.int(1) >> self.int(32), self.int(0))
self.assertIdentical(self.int(-1) >> self.int(32), self.int(-1))
def test_and(self):
self._test_arithmetic(operator.and_, 1, 3, 1)
self.assertIdentical(self.int(-1) & self.int(2 ** 31), self.int(2 ** 31))
self._test_pointer_type_errors(operator.and_)
self._test_floating_type_errors(operator.and_)
def test_xor(self):
self._test_arithmetic(operator.xor, 1, 3, 2)
self.assertIdentical(self.int(-1) ^ self.int(-(2 ** 31)), self.int(2 ** 31 - 1))
self._test_pointer_type_errors(operator.xor)
self._test_floating_type_errors(operator.xor)
def test_or(self):
self._test_arithmetic(operator.or_, 1, 3, 3)
self.assertIdentical(self.int(-(2 ** 31)) | self.int(2 ** 31 - 1), self.int(-1))
self._test_pointer_type_errors(operator.or_)
self._test_floating_type_errors(operator.or_)
def test_pos(self):
# TestIntegerPromotion covers the other cases.
self.assertRaisesRegex(
TypeError,
r"invalid operand to unary \+",
operator.pos,
Object(self.prog, "int *", value=0),
)
def test_neg(self):
self.assertIdentical(-Object(self.prog, "unsigned char", value=1), self.int(-1))
self.assertIdentical(-self.int(-1), self.int(1))
self.assertIdentical(-self.unsigned_int(1), self.unsigned_int(0xFFFFFFFF))
self.assertIdentical(
-Object(self.prog, "long", value=-0x8000000000000000),
Object(self.prog, "long", value=-0x8000000000000000),
)
self.assertIdentical(-self.double(2.0), self.double(-2.0))
self.assertRaisesRegex(
TypeError,
"invalid operand to unary -",
operator.neg,
Object(self.prog, "int *", value=0),
)
def test_not(self):
self.assertIdentical(~self.int(1), self.int(-2))
self.assertIdentical(
~Object(self.prog, "unsigned long long", value=-1),
Object(self.prog, "unsigned long long", value=0),
)
self.assertIdentical(
~Object(self.prog, "unsigned char", value=255), self.int(-256)
)
for type_ in ["int *", "double"]:
self.assertRaisesRegex(
TypeError,
"invalid operand to unary ~",
operator.invert,
Object(self.prog, type_, value=0),
)
def test_container_of(self):
obj = Object(self.prog, "int *", value=0xFFFF000C)
container_of(obj, self.point_type, "x")
self.assertIdentical(
container_of(obj, self.point_type, "x"),
Object(
self.prog, self.prog.pointer_type(self.point_type), value=0xFFFF000C
),
)
self.assertIdentical(
container_of(obj, self.point_type, "y"),
Object(
self.prog, self.prog.pointer_type(self.point_type), value=0xFFFF0008
),
)
self.assertIdentical(
container_of(obj, self.line_segment_type, "a.x"),
Object(
self.prog,
self.prog.pointer_type(self.line_segment_type),
value=0xFFFF000C,
),
)
self.assertIdentical(
container_of(obj, self.line_segment_type, "b.x"),
Object(
self.prog,
self.prog.pointer_type(self.line_segment_type),
value=0xFFFF0004,
),
)
self.assertRaisesRegex(
LookupError,
"'struct line_segment' has no member 'c'",
container_of,
obj,
self.line_segment_type,
"c.x",
)
polygon_type = self.prog.struct_type(
"polygon", 0, (TypeMember(self.prog.array_type(self.point_type), "points"),)
)
self.assertIdentical(
container_of(obj, polygon_type, "points[3].x"),
Object(self.prog, self.prog.pointer_type(polygon_type), value=0xFFFEFFF4),
)
small_point_type = self.prog.struct_type(
"small_point",
1,
(
TypeMember(
Object(
self.prog, self.prog.int_type("int", 4, True), bit_field_size=4
),
"x",
0,
),
TypeMember(
Object(
self.prog, self.prog.int_type("int", 4, True), bit_field_size=4
),
"y",
4,
),
),
)
self.assertRaisesRegex(
ValueError,
"member is not byte-aligned",
container_of,
obj,
small_point_type,
"y",
)
self.assertRaisesRegex(
TypeError,
r"container_of\(\) argument must be a pointer",
container_of,
obj[0],
self.point_type,
"x",
)
self.assertRaisesRegex(
TypeError,
"not a structure, union, or class",
container_of,
obj,
obj.type_,
"x",
),
type_ = self.prog.struct_type(
"foo",
16,
(
TypeMember(
self.prog.array_type(self.prog.int_type("int", 4, True), 8), "arr"
),
TypeMember(self.point_type, "point", 256),
),
)
syntax_errors = [
("", r"^expected identifier$"),
("[1]", r"^expected identifier$"),
("point.", r"^expected identifier after '\.'$"),
("point(", r"^expected '\.' or '\[' after identifier$"),
("arr[1](", r"^expected '\.' or '\[' after ']'$"),
("arr[]", r"^expected number after '\['$"),
("arr[1)", r"^expected ']' after number$"),
]
for member_designator, error in syntax_errors:
self.assertRaisesRegex(
SyntaxError, error, container_of, obj, type_, member_designator
)
class TestPrettyPrintObject(MockProgramTestCase):
def test_int(self):
obj = Object(self.prog, "int", value=99)
self.assertEqual(str(obj), "(int)99")
self.assertEqual(obj.format_(type_name=False), "99")
self.assertEqual(
str(Object(self.prog, "const int", value=-99)), "(const int)-99"
)
def test_char(self):
obj = Object(self.prog, "char", value=65)
self.assertEqual(str(obj), "(char)65")
self.assertEqual(obj.format_(char=True), "(char)'A'")
self.assertEqual(
Object(self.prog, "signed char", value=65).format_(char=True),
"(signed char)'A'",
)
self.assertEqual(
Object(self.prog, "unsigned char", value=65).format_(char=True),
"(unsigned char)'A'",
)
self.assertEqual(
Object(
self.prog,
self.prog.typedef_type("uint8_t", self.prog.type("unsigned char")),
value=65,
).format_(char=True),
"(uint8_t)65",
)
def test_bool(self):
self.assertEqual(str(Object(self.prog, "_Bool", value=False)), "(_Bool)0")
self.assertEqual(
str(Object(self.prog, "const _Bool", value=True)), "(const _Bool)1"
)
def test_float(self):
self.assertEqual(str(Object(self.prog, "double", value=2.0)), "(double)2.0")
self.assertEqual(str(Object(self.prog, "float", value=0.5)), "(float)0.5")
def test_typedef(self):
type_ = self.prog.typedef_type("INT", self.prog.int_type("int", 4, True))
self.assertEqual(str(Object(self.prog, type_, value=99)), "(INT)99")
type_ = self.prog.typedef_type(
"INT", self.prog.int_type("int", 4, True), qualifiers=Qualifiers.CONST
)
self.assertEqual(str(Object(self.prog, type_, value=99)), "(const INT)99")
type_ = self.prog.typedef_type(
"CINT", self.prog.int_type("int", 4, True, qualifiers=Qualifiers.CONST)
)
self.assertEqual(str(Object(self.prog, type_, value=99)), "(CINT)99")
def test_struct(self):
segment = (
(99).to_bytes(4, "little")
+ (-1).to_bytes(4, "little", signed=True)
+ (12345).to_bytes(4, "little", signed=True)
+ (0).to_bytes(4, "little", signed=True)
)
self.add_memory_segment(segment, virt_addr=0xFFFF0000)
self.types.append(self.point_type)
obj = Object(self.prog, "struct point", address=0xFFFF0000)
self.assertEqual(
str(obj),
"""\
(struct point){
.x = (int)99,
.y = (int)-1,
}""",
)
self.assertEqual(
obj.format_(member_type_names=False),
"""\
(struct point){
.x = 99,
.y = -1,
}""",
)
self.assertEqual(
obj.format_(members_same_line=True),
"(struct point){ .x = (int)99, .y = (int)-1 }",
)
self.assertEqual(
obj.format_(member_names=False),
"""\
(struct point){
(int)99,
(int)-1,
}""",
)
self.assertEqual(
obj.format_(members_same_line=True, member_names=False),
"(struct point){ (int)99, (int)-1 }",
)
type_ = self.prog.struct_type(
"foo",
16,
(
TypeMember(self.point_type, "point"),
TypeMember(
self.prog.struct_type(
None,
8,
(
TypeMember(self.prog.int_type("int", 4, True), "bar"),
TypeMember(self.prog.int_type("int", 4, True), "baz", 32),
),
),
None,
64,
),
),
)
obj = Object(self.prog, type_, address=0xFFFF0000)
expected = """\
(struct foo){
.point = (struct point){
.x = (int)99,
.y = (int)-1,
},
.bar = (int)12345,
.baz = (int)0,
}"""
self.assertEqual(str(obj), expected)
self.assertEqual(str(obj.read_()), expected)
self.add_memory_segment(
(
(99).to_bytes(8, "little")
+ (-1).to_bytes(8, "little", signed=True)
+ (12345).to_bytes(8, "little", signed=True)
+ (0).to_bytes(8, "little", signed=True)
),
virt_addr=0xFFFF8000,
)
type_ = self.prog.struct_type(
"foo",
32,
(
TypeMember(
self.prog.struct_type(
"long_point",
16,
(
TypeMember(self.prog.int_type("long", 8, True), "x"),
TypeMember(self.prog.int_type("long", 8, True), "y", 64),
),
),
"point",
),
TypeMember(self.prog.int_type("long", 8, True), "bar", 128),
TypeMember(self.prog.int_type("long", 8, True), "baz", 192),
),
)
obj = Object(self.prog, type_, address=0xFFFF8000)
expected = """\
(struct foo){
.point = (struct long_point){
.x = (long)99,
.y = (long)-1,
},
.bar = (long)12345,
.baz = (long)0,
}"""
self.assertEqual(str(obj), expected)
self.assertEqual(str(obj.read_()), expected)
type_ = self.prog.struct_type("foo", 0, ())
self.assertEqual(str(Object(self.prog, type_, address=0)), "(struct foo){}")
obj = Object(self.prog, self.point_type, value={"x": 1})
self.assertEqual(
obj.format_(implicit_members=False),
"""\
(struct point){
.x = (int)1,
}""",
)
self.assertEqual(
obj.format_(member_names=False, implicit_members=False),
"""\
(struct point){
(int)1,
}""",
)
obj = Object(self.prog, self.point_type, value={"y": 1})
self.assertEqual(
obj.format_(implicit_members=False),
"""\
(struct point){
.y = (int)1,
}""",
)
self.assertEqual(
obj.format_(member_names=False, implicit_members=False),
"""\
(struct point){
(int)0,
(int)1,
}""",
)
def test_bit_field(self):
self.add_memory_segment(b"\x07\x10\x5e\x5f\x1f\0\0\0", virt_addr=0xFFFF0000)
type_ = self.prog.struct_type(
"bits",
8,
(
TypeMember(
Object(
self.prog, self.prog.int_type("int", 4, True), bit_field_size=4
),
"x",
0,
),
TypeMember(
Object(
self.prog,
self.prog.int_type("int", 4, True, qualifiers=Qualifiers.CONST),
bit_field_size=28,
),
"y",
4,
),
TypeMember(
Object(
self.prog, self.prog.int_type("int", 4, True), bit_field_size=5
),
"z",
32,
),
),
)
obj = Object(self.prog, type_, address=0xFFFF0000)
self.assertEqual(
str(obj),
"""\
(struct bits){
.x = (int)7,
.y = (const int)100000000,
.z = (int)-1,
}""",
)
self.assertEqual(str(obj.x), "(int)7")
self.assertEqual(str(obj.y), "(const int)100000000")
self.assertEqual(str(obj.z), "(int)-1")
def test_union(self):
self.add_memory_segment(b"\0\0\x80?", virt_addr=0xFFFF0000)
self.types.append(self.option_type)
self.assertEqual(
str(Object(self.prog, "union option", address=0xFFFF0000)),
"""\
(union option){
.i = (int)1065353216,
.f = (float)1.0,
}""",
)
def test_enum(self):
self.assertEqual(
str(Object(self.prog, self.color_type, value=0)), "(enum color)RED"
)
self.assertEqual(
str(Object(self.prog, self.color_type, value=1)), "(enum color)GREEN"
)
self.assertEqual(
str(Object(self.prog, self.color_type, value=4)), "(enum color)4"
)
obj = Object(self.prog, self.prog.enum_type("color"), address=0)
self.assertRaisesRegex(TypeError, "cannot format incomplete enum", str, obj)
def test_pointer(self):
self.add_memory_segment((99).to_bytes(4, "little"), virt_addr=0xFFFF0000)
obj = Object(self.prog, "int *", value=0xFFFF0000)
self.assertEqual(str(obj), "*(int *)0xffff0000 = 99")
self.assertEqual(obj.format_(dereference=False), "(int *)0xffff0000")
self.assertEqual(
str(Object(self.prog, "int *", value=0x7FFFFFFF)), "(int *)0x7fffffff"
)
def test_void_pointer(self):
self.add_memory_segment((99).to_bytes(4, "little"), virt_addr=0xFFFF0000)
self.assertEqual(
str(Object(self.prog, "void *", value=0xFFFF0000)), "(void *)0xffff0000"
)
def test_pointer_typedef(self):
self.add_memory_segment(
(0xFFFF00F0).to_bytes(8, "little"), virt_addr=0xFFFF0000
)
type_ = self.prog.typedef_type(
"HANDLE",
self.prog.pointer_type(self.prog.pointer_type(self.prog.void_type())),
)
self.assertEqual(
str(Object(self.prog, type_, value=0xFFFF0000)),
"*(HANDLE)0xffff0000 = 0xffff00f0",
)
# TODO: test symbolize.
def test_c_string(self):
self.add_memory_segment(b"hello\0", virt_addr=0xFFFF0000)
self.add_memory_segment(b"unterminated", virt_addr=0xFFFF0010)
self.add_memory_segment(b'"escape\tme\\\0', virt_addr=0xFFFF0020)
obj = Object(self.prog, "char *", value=0xFFFF0000)
self.assertEqual(str(obj), '(char *)0xffff0000 = "hello"')
self.assertEqual(obj.format_(string=False), "*(char *)0xffff0000 = 104")
self.assertEqual(str(Object(self.prog, "char *", value=0x0)), "(char *)0x0")
self.assertEqual(
str(Object(self.prog, "char *", value=0xFFFF0010)), "(char *)0xffff0010"
)
self.assertEqual(
str(Object(self.prog, "char *", value=0xFFFF0020)),
r'(char *)0xffff0020 = "\"escape\tme\\"',
)
def test_basic_array(self):
segment = bytearray()
for i in range(5):
segment.extend(i.to_bytes(4, "little"))
self.add_memory_segment(segment, virt_addr=0xFFFF0000)
obj = Object(self.prog, "int [5]", address=0xFFFF0000)
self.assertEqual(str(obj), "(int [5]){ 0, 1, 2, 3, 4 }")
self.assertEqual(
obj.format_(type_name=False, element_type_names=True),
"{ (int)0, (int)1, (int)2, (int)3, (int)4 }",
)
self.assertEqual(
obj.format_(element_indices=True),
"(int [5]){ [1] = 1, [2] = 2, [3] = 3, [4] = 4 }",
)
self.assertEqual(
obj.format_(element_indices=True, implicit_elements=True),
"(int [5]){ [0] = 0, [1] = 1, [2] = 2, [3] = 3, [4] = 4 }",
)
self.assertEqual(obj.format_(columns=27), str(obj))
for columns in range(22, 26):
self.assertEqual(
obj.format_(columns=columns),
"""\
(int [5]){
0, 1, 2, 3, 4,
}""",
)
for columns in range(19, 22):
self.assertEqual(
obj.format_(columns=columns),
"""\
(int [5]){
0, 1, 2, 3,
4,
}""",
)
for columns in range(16, 19):
self.assertEqual(
obj.format_(columns=columns),
"""\
(int [5]){
0, 1, 2,
3, 4,
}""",
)
for columns in range(13, 16):
self.assertEqual(
obj.format_(columns=columns),
"""\
(int [5]){
0, 1,
2, 3,
4,
}""",
)
for columns in range(13):
self.assertEqual(
obj.format_(columns=columns),
"""\
(int [5]){
0,
1,
2,
3,
4,
}""",
)
self.assertEqual(
obj.format_(elements_same_line=False),
"""\
(int [5]){
0,
1,
2,
3,
4,
}""",
)
def test_nested_array(self):
segment = bytearray()
for i in range(10):
segment.extend(i.to_bytes(4, "little"))
self.add_memory_segment(segment, virt_addr=0xFFFF0000)
obj = Object(self.prog, "int [2][5]", address=0xFFFF0000)
self.assertEqual(
str(obj), "(int [2][5]){ { 0, 1, 2, 3, 4 }, { 5, 6, 7, 8, 9 } }"
)
self.assertEqual(obj.format_(columns=52), str(obj))
for columns in range(45, 52):
self.assertEqual(
obj.format_(columns=columns),
"""\
(int [2][5]){
{ 0, 1, 2, 3, 4 }, { 5, 6, 7, 8, 9 },
}""",
)
for columns in range(26, 45):
self.assertEqual(
obj.format_(columns=columns),
"""\
(int [2][5]){
{ 0, 1, 2, 3, 4 },
{ 5, 6, 7, 8, 9 },
}""",
)
for columns in range(24, 26):
self.assertEqual(
obj.format_(columns=columns),
"""\
(int [2][5]){
{
0, 1, 2,
3, 4,
},
{
5, 6, 7,
8, 9,
},
}""",
)
for columns in range(21, 24):
self.assertEqual(
obj.format_(columns=columns),
"""\
(int [2][5]){
{
0, 1,
2, 3,
4,
},
{
5, 6,
7, 8,
9,
},
}""",
)
for columns in range(21):
self.assertEqual(
obj.format_(columns=columns),
"""\
(int [2][5]){
{
0,
1,
2,
3,
4,
},
{
5,
6,
7,
8,
9,
},
}""",
)
def test_array_member(self):
segment = bytearray()
for i in range(5):
segment.extend(i.to_bytes(4, "little"))
self.add_memory_segment(segment, virt_addr=0xFFFF0000)
type_ = self.prog.struct_type(
None,
20,
(
TypeMember(
self.prog.array_type(self.prog.int_type("int", 4, True), 5), "arr"
),
),
)
obj = Object(self.prog, type_, address=0xFFFF0000)
self.assertEqual(
str(obj),
"""\
(struct <anonymous>){
.arr = (int [5]){ 0, 1, 2, 3, 4 },
}""",
)
self.assertEqual(obj.format_(columns=42), str(obj))
self.assertEqual(
obj.format_(columns=41),
"""\
(struct <anonymous>){
.arr = (int [5]){
0, 1, 2, 3, 4,
},
}""",
)
self.assertEqual(
obj.format_(columns=18),
"""\
(struct <anonymous>){
.arr = (int [5]){
0,
1,
2,
3,
4,
},
}""",
)
def test_array_of_struct(self):
segment = bytearray()
for i in range(1, 5):
segment.extend(i.to_bytes(4, "little"))
self.add_memory_segment(segment, virt_addr=0xFFFF0000)
self.types.append(self.point_type)
obj = Object(self.prog, "struct point [2]", address=0xFFFF0000)
self.assertEqual(
str(obj),
"""\
(struct point [2]){
{
.x = (int)1,
.y = (int)2,
},
{
.x = (int)3,
.y = (int)4,
},
}""",
)
def test_zero_length_array(self):
self.assertEqual(str(Object(self.prog, "int []", address=0)), "(int []){}")
self.assertEqual(str(Object(self.prog, "int [0]", address=0)), "(int [0]){}")
def test_array_zeroes(self):
segment = bytearray(16)
self.add_memory_segment(segment, virt_addr=0xFFFF0000)
self.types.append(self.point_type)
self.types.append(self.prog.struct_type("empty", 0, ()))
obj = Object(self.prog, "int [2]", address=0xFFFF0000)
self.assertEqual(str(obj), "(int [2]){}")
self.assertEqual(obj.format_(implicit_elements=True), "(int [2]){ 0, 0 }")
segment[:4] = (99).to_bytes(4, "little")
self.assertEqual(str(obj), "(int [2]){ 99 }")
segment[:4] = (0).to_bytes(4, "little")
segment[4:8] = (99).to_bytes(4, "little")
self.assertEqual(str(obj), "(int [2]){ 0, 99 }")
obj = Object(self.prog, "struct point [2]", address=0xFFFF0000)
self.assertEqual(
str(obj),
"""\
(struct point [2]){
{
.x = (int)0,
.y = (int)99,
},
}""",
)
obj = Object(self.prog, "struct empty [2]", address=0)
self.assertEqual(str(obj), "(struct empty [2]){}")
def test_char_array(self):
segment = bytearray(16)
self.add_memory_segment(segment, virt_addr=0xFFFF0000)
obj = Object(self.prog, "char [4]", address=0xFFFF0000)
segment[:16] = b"hello, world\0\0\0\0"
self.assertEqual(str(obj), '(char [4])"hell"')
self.assertEqual(obj.format_(string=False), "(char [4]){ 104, 101, 108, 108 }")
self.assertEqual(str(obj.read_()), str(obj))
segment[2] = 0
self.assertEqual(str(obj), '(char [4])"he"')
self.assertEqual(str(obj.read_()), str(obj))
self.assertEqual(
str(Object(self.prog, "char [0]", address=0xFFFF0000)), "(char [0]){}"
)
self.assertEqual(
str(Object(self.prog, "char []", address=0xFFFF0000)), "(char []){}"
)
def test_function(self):
obj = Object(
self.prog,
self.prog.function_type(self.prog.void_type(), (), False),
address=0xFFFF0000,
)
self.assertEqual(str(obj), "(void (void))0xffff0000")
def test_absent(self):
self.assertRaises(TypeError, str, Object(self.prog, "void"))
for type_ in [
"int",
"char",
"_Bool",
"double",
self.point_type,
self.option_type,
self.coord_type,
self.color_type,
"size_t",
"void *",
"int [2]",
self.prog.function_type(self.prog.void_type(), ()),
]:
if isinstance(type_, Type):
type_name = type_.type_name()
else:
type_name = type_
self.assertEqual(str(Object(self.prog, type_)), f"({type_name})<absent>")
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