1 /*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <stdint.h>
18
19 #include <memory>
20
21 #include <gtest/gtest.h>
22
23 #include <unwindstack/DwarfError.h>
24
25 #include "DwarfEhFrame.h"
26 #include "DwarfEncoding.h"
27
28 #include "LogFake.h"
29 #include "utils/MemoryFake.h"
30
31 namespace unwindstack {
32
33 template <typename TypeParam>
34 class DwarfEhFrameTest : public ::testing::Test {
35 protected:
SetUp()36 void SetUp() override {
37 fake_memory_ = new MemoryFake;
38 std::shared_ptr<Memory> memory(fake_memory_);
39 eh_frame_.reset(new DwarfEhFrame<TypeParam>(memory));
40 ResetLogs();
41 }
42
43 MemoryFake* fake_memory_;
44 std::unique_ptr<DwarfEhFrame<TypeParam>> eh_frame_;
45 };
46 TYPED_TEST_SUITE_P(DwarfEhFrameTest);
47
48 // NOTE: All test class variables need to be referenced as this->.
49
50 // Only verify different cie/fde format. All other DwarfSection corner
51 // cases are tested in DwarfDebugFrameTest.cpp.
52
TYPED_TEST_P(DwarfEhFrameTest,GetFdeCieFromOffset32)53 TYPED_TEST_P(DwarfEhFrameTest, GetFdeCieFromOffset32) {
54 // CIE 32 information.
55 this->fake_memory_->SetData32(0x5000, 0xfc);
56 // Indicates this is a cie for eh_frame.
57 this->fake_memory_->SetData32(0x5004, 0);
58 this->fake_memory_->SetMemory(0x5008, std::vector<uint8_t>{1, '\0', 16, 32, 1});
59
60 // FDE 32 information.
61 this->fake_memory_->SetData32(0x5100, 0xfc);
62 this->fake_memory_->SetData32(0x5104, 0x104);
63 this->fake_memory_->SetData32(0x5108, 0x1500);
64 this->fake_memory_->SetData32(0x510c, 0x200);
65
66 const DwarfFde* fde = this->eh_frame_->GetFdeFromOffset(0x5100);
67 ASSERT_TRUE(fde != nullptr);
68 EXPECT_EQ(0x5000U, fde->cie_offset);
69 EXPECT_EQ(0x5110U, fde->cfa_instructions_offset);
70 EXPECT_EQ(0x5200U, fde->cfa_instructions_end);
71 EXPECT_EQ(0x6608U, fde->pc_start);
72 EXPECT_EQ(0x6808U, fde->pc_end);
73 EXPECT_EQ(0U, fde->lsda_address);
74
75 const DwarfCie* cie = fde->cie;
76 ASSERT_TRUE(cie != nullptr);
77 EXPECT_EQ(1U, cie->version);
78 EXPECT_EQ(DW_EH_PE_udata4, cie->fde_address_encoding);
79 EXPECT_EQ(DW_EH_PE_omit, cie->lsda_encoding);
80 EXPECT_EQ(0U, cie->segment_size);
81 EXPECT_EQ('\0', cie->augmentation_string[0]);
82 EXPECT_EQ(0U, cie->personality_handler);
83 EXPECT_EQ(0x500dU, cie->cfa_instructions_offset);
84 EXPECT_EQ(0x5100U, cie->cfa_instructions_end);
85 EXPECT_EQ(16U, cie->code_alignment_factor);
86 EXPECT_EQ(32U, cie->data_alignment_factor);
87 EXPECT_EQ(1U, cie->return_address_register);
88 }
89
TYPED_TEST_P(DwarfEhFrameTest,GetFdeCieFromOffset64)90 TYPED_TEST_P(DwarfEhFrameTest, GetFdeCieFromOffset64) {
91 // CIE 64 information.
92 this->fake_memory_->SetData32(0x5000, 0xffffffff);
93 this->fake_memory_->SetData64(0x5004, 0xfc);
94 // Indicates this is a cie for eh_frame.
95 this->fake_memory_->SetData64(0x500c, 0);
96 this->fake_memory_->SetMemory(0x5014, std::vector<uint8_t>{1, '\0', 16, 32, 1});
97
98 // FDE 64 information.
99 this->fake_memory_->SetData32(0x5100, 0xffffffff);
100 this->fake_memory_->SetData64(0x5104, 0xfc);
101 this->fake_memory_->SetData64(0x510c, 0x10c);
102 this->fake_memory_->SetData64(0x5114, 0x1500);
103 this->fake_memory_->SetData64(0x511c, 0x200);
104
105 const DwarfFde* fde = this->eh_frame_->GetFdeFromOffset(0x5100);
106 ASSERT_TRUE(fde != nullptr);
107 EXPECT_EQ(0x5000U, fde->cie_offset);
108 EXPECT_EQ(0x5124U, fde->cfa_instructions_offset);
109 EXPECT_EQ(0x5208U, fde->cfa_instructions_end);
110 EXPECT_EQ(0x6618U, fde->pc_start);
111 EXPECT_EQ(0x6818U, fde->pc_end);
112 EXPECT_EQ(0U, fde->lsda_address);
113
114 const DwarfCie* cie = fde->cie;
115 ASSERT_TRUE(cie != nullptr);
116 EXPECT_EQ(1U, cie->version);
117 EXPECT_EQ(DW_EH_PE_udata8, cie->fde_address_encoding);
118 EXPECT_EQ(DW_EH_PE_omit, cie->lsda_encoding);
119 EXPECT_EQ(0U, cie->segment_size);
120 EXPECT_EQ('\0', cie->augmentation_string[0]);
121 EXPECT_EQ(0U, cie->personality_handler);
122 EXPECT_EQ(0x5019U, cie->cfa_instructions_offset);
123 EXPECT_EQ(0x5108U, cie->cfa_instructions_end);
124 EXPECT_EQ(16U, cie->code_alignment_factor);
125 EXPECT_EQ(32U, cie->data_alignment_factor);
126 EXPECT_EQ(1U, cie->return_address_register);
127 }
128
129 REGISTER_TYPED_TEST_SUITE_P(DwarfEhFrameTest, GetFdeCieFromOffset32, GetFdeCieFromOffset64);
130
131 typedef ::testing::Types<uint32_t, uint64_t> DwarfEhFrameTestTypes;
132 INSTANTIATE_TYPED_TEST_SUITE_P(Libunwindstack, DwarfEhFrameTest, DwarfEhFrameTestTypes);
133
134 } // namespace unwindstack
135