1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
|
// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "courgette/encoded_program.h"
#include <stddef.h>
#include <stdint.h>
#include <memory>
#include <vector>
#include "courgette/image_utils.h"
#include "courgette/label_manager.h"
#include "courgette/streams.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace courgette {
namespace {
// Helper class to instantiate RVAToLabel while managing allocation.
class TestLabelManager : public LabelManager {
public:
void RawAddLabel(int index, RVA rva) {
labels_.push_back(Label(rva, index)); // Don't care about |count_|.
}
};
// Creates a simple new program with given addresses. The orders of elements
// in |abs32_specs| and |rel32_specs| are important.
std::unique_ptr<EncodedProgram> CreateTestProgram(
const TestLabelManager& abs32_label_manager,
const TestLabelManager& rel32_label_manager) {
std::unique_ptr<EncodedProgram> program(new EncodedProgram());
uint32_t base = 0x00900000;
program->set_image_base(base);
EXPECT_TRUE(program->ImportLabels(abs32_label_manager, rel32_label_manager));
EXPECT_TRUE(program->AddOrigin(0)); // Start at base.
// Add instructions. Since we're using TestLabelManager, Labels are sorted in
// the order they're added via Add().
for (const Label& label : abs32_label_manager.Labels())
EXPECT_TRUE(program->AddAbs32(label.index_));
for (const Label& label : rel32_label_manager.Labels())
EXPECT_TRUE(program->AddRel32(label.index_));
return program;
}
bool CompareSink(const uint8_t expected[],
size_t num_expected,
SinkStream* ss) {
size_t n = ss->Length();
if (num_expected != n)
return false;
const uint8_t* buffer = ss->Buffer();
return memcmp(&expected[0], buffer, n) == 0;
}
} // namespace
// Create a simple program with a few addresses and references and
// check that the bits produced are as expected.
TEST(EncodedProgramTest, Test) {
// ABS32 index 7 <-- base + 4.
TestLabelManager abs32_label_manager;
abs32_label_manager.RawAddLabel(7, 4);
// REL32 index 5 <-- base + 0.
TestLabelManager rel32_label_manager;
rel32_label_manager.RawAddLabel(5, 0);
std::unique_ptr<EncodedProgram> program(
CreateTestProgram(abs32_label_manager, rel32_label_manager));
// Serialize and deserialize.
SinkStreamSet sinks;
EXPECT_TRUE(program->WriteTo(&sinks));
program.reset();
SinkStream sink;
bool can_collect = sinks.CopyTo(&sink);
EXPECT_TRUE(can_collect);
const void* buffer = sink.Buffer();
size_t length = sink.Length();
SourceStreamSet sources;
bool can_get_source_streams = sources.Init(buffer, length);
EXPECT_TRUE(can_get_source_streams);
std::unique_ptr<EncodedProgram> encoded2(new EncodedProgram());
bool can_read = encoded2->ReadFrom(&sources);
EXPECT_TRUE(can_read);
// Finally, try to assemble.
SinkStream assembled;
bool can_assemble = encoded2->AssembleTo(&assembled);
EXPECT_TRUE(can_assemble);
encoded2.reset();
const uint8_t golden[] = {
0x04, 0x00, 0x90,
0x00, // ABS32 to base + 4
0xF8, 0xFF, 0xFF,
0xFF // REL32 from next line to base + 2
};
EXPECT_TRUE(CompareSink(golden, std::size(golden), &assembled));
}
// A larger test with multiple addresses. We encode the program and check the
// contents of the address streams.
TEST(EncodedProgramTest, TestWriteAddress) {
// Absolute addresses by index: [_, _, _, 2, _, 23, _, 11].
TestLabelManager abs32_label_manager;
abs32_label_manager.RawAddLabel(7, 11);
abs32_label_manager.RawAddLabel(3, 2);
abs32_label_manager.RawAddLabel(5, 23);
// Relative addresses by index: [16, 7, _, 32].
TestLabelManager rel32_label_manager;
rel32_label_manager.RawAddLabel(0, 16);
rel32_label_manager.RawAddLabel(3, 32);
rel32_label_manager.RawAddLabel(1, 7);
std::unique_ptr<EncodedProgram> program(
CreateTestProgram(abs32_label_manager, rel32_label_manager));
SinkStreamSet sinks;
EXPECT_TRUE(program->WriteTo(&sinks));
program.reset();
// Check indexes and addresses in sinks.
const uint8_t golden_abs32_indexes[] = {
0x03, 0x07, 0x03, 0x05 // 3 indexes: [7, 3, 5].
};
EXPECT_TRUE(CompareSink(golden_abs32_indexes, std::size(golden_abs32_indexes),
sinks.stream(kStreamAbs32Indexes)));
const uint8_t golden_rel32_indexes[] = {
0x03, 0x00, 0x03, 0x01 // 3 indexes: [0, 3, 1].
};
EXPECT_TRUE(CompareSink(golden_rel32_indexes, std::size(golden_rel32_indexes),
sinks.stream(kStreamRel32Indexes)));
// Addresses: [_, _, _, 2, _, 23, _, 11].
// Padded: [0, 0, 0, 2, 2, 23, 23, 11].
// Delta: [0, 0, 0, 2, 0, 21, 0, -12].
// Hex: [0, 0, 0, 0x02, 0, 0x15, 0, 0xFFFFFFF4].
// Complement neg: [0, 0, 0, 0x02, 0, 0x15, 0, (0x0B)].
// Varint32 Signed: [0, 0, 0, 0x04, 0, 0x2A, 0, 0x17].
const uint8_t golden_abs32_addresses[] = {
0x08, // 8 address deltas.
0x00, 0x00, 0x00, 0x04, 0x00, 0x2A, 0x00, 0x17,
};
EXPECT_TRUE(CompareSink(golden_abs32_addresses,
std::size(golden_abs32_addresses),
sinks.stream(kStreamAbs32Addresses)));
// Addresses: [16, 7, _, 32].
// Padded: [16, 7, 7, 32].
// Delta: [16, -9, 0, 25].
// Hex: [0x10, 0xFFFFFFF7, 0, 0x19].
// Complement Neg: [0x10, (0x08), 0, 0x19].
// Varint32 Signed: [0x20, 0x11, 0, 0x32].
const uint8_t golden_rel32_addresses[] = {
0x04, // 4 address deltas.
0x20, 0x11, 0x00, 0x32,
};
EXPECT_TRUE(CompareSink(golden_rel32_addresses,
std::size(golden_rel32_addresses),
sinks.stream(kStreamRel32Addresses)));
}
} // namespace courgette
|
