1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include <string>
6
7 #include "base/strings/string_util.h"
8
9 #include "courgette/assembly_program.h"
10 #include "courgette/courgette.h"
11 #include "courgette/streams.h"
12
13 #include "testing/gtest/include/gtest/gtest.h"
14
15 class AdjustmentMethodTest : public testing::Test {
16 public:
17 void Test1() const;
18
19 private:
SetUp()20 void SetUp() {
21 }
22
TearDown()23 void TearDown() {
24 }
25
26 // Returns one of two similar a simple programs. They differ only in the
27 // label assignment, so that it is possible to make them look identical.
MakeProgram(int kind) const28 courgette::AssemblyProgram* MakeProgram(int kind) const {
29 courgette::AssemblyProgram* prog =
30 new courgette::AssemblyProgram(courgette::EXE_WIN_32_X86);
31 prog->set_image_base(0x00400000);
32
33 courgette::Label* labelA = prog->FindOrMakeAbs32Label(0x00410000);
34 courgette::Label* labelB = prog->FindOrMakeAbs32Label(0x00410004);
35
36 EXPECT_TRUE(prog->EmitAbs32(labelA));
37 EXPECT_TRUE(prog->EmitAbs32(labelA));
38 EXPECT_TRUE(prog->EmitAbs32(labelB));
39 EXPECT_TRUE(prog->EmitAbs32(labelA));
40 EXPECT_TRUE(prog->EmitAbs32(labelA));
41 EXPECT_TRUE(prog->EmitAbs32(labelB));
42
43 if (kind == 0) {
44 labelA->index_ = 0;
45 labelB->index_ = 1;
46 } else {
47 labelA->index_ = 1;
48 labelB->index_ = 0;
49 }
50 prog->AssignRemainingIndexes();
51
52 return prog;
53 }
54
MakeProgramA() const55 courgette::AssemblyProgram* MakeProgramA() const { return MakeProgram(0); }
MakeProgramB() const56 courgette::AssemblyProgram* MakeProgramB() const { return MakeProgram(1); }
57
58 // Returns a string that is the serialized version of |program|.
59 // Deletes |program|.
Serialize(courgette::AssemblyProgram * program) const60 std::string Serialize(courgette::AssemblyProgram *program) const {
61 courgette::EncodedProgram* encoded = NULL;
62
63 const courgette::Status encode_status = Encode(program, &encoded);
64 EXPECT_EQ(courgette::C_OK, encode_status);
65
66 DeleteAssemblyProgram(program);
67
68 courgette::SinkStreamSet sinks;
69 const courgette::Status write_status = WriteEncodedProgram(encoded, &sinks);
70 EXPECT_EQ(courgette::C_OK, write_status);
71
72 DeleteEncodedProgram(encoded);
73
74 courgette::SinkStream sink;
75 bool can_collect = sinks.CopyTo(&sink);
76 EXPECT_TRUE(can_collect);
77
78 return std::string(reinterpret_cast<const char *>(sink.Buffer()),
79 sink.Length());
80 }
81 };
82
83
Test1() const84 void AdjustmentMethodTest::Test1() const {
85 courgette::AssemblyProgram* prog1 = MakeProgramA();
86 courgette::AssemblyProgram* prog2 = MakeProgramB();
87 std::string s1 = Serialize(prog1);
88 std::string s2 = Serialize(prog2);
89
90 // Don't use EXPECT_EQ because strings are unprintable.
91 EXPECT_FALSE(s1 == s2); // Unadjusted A and B differ.
92
93 courgette::AssemblyProgram* prog5 = MakeProgramA();
94 courgette::AssemblyProgram* prog6 = MakeProgramB();
95 courgette::Status can_adjust = Adjust(*prog5, prog6);
96 EXPECT_EQ(courgette::C_OK, can_adjust);
97 std::string s5 = Serialize(prog5);
98 std::string s6 = Serialize(prog6);
99
100 EXPECT_TRUE(s1 == s5); // Adjustment did not change A (prog5)
101 EXPECT_TRUE(s5 == s6); // Adjustment did change B into A
102 }
103
104
TEST_F(AdjustmentMethodTest,All)105 TEST_F(AdjustmentMethodTest, All) {
106 Test1();
107 }
108