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Christopher Ferris570b76f2017-06-30 17:18:16 -07001/*
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 <elf.h>
18#include <errno.h>
19#include <signal.h>
20#include <string.h>
21#include <sys/mman.h>
22#include <sys/ptrace.h>
23#include <sys/types.h>
24#include <unistd.h>
25
26#include <memory>
27#include <vector>
28
29#include <android-base/file.h>
30#include <android-base/test_utils.h>
31#include <gtest/gtest.h>
32
Christopher Ferrisd226a512017-07-14 10:37:19 -070033#include <unwindstack/Elf.h>
34#include <unwindstack/MapInfo.h>
35#include <unwindstack/Memory.h>
36
Christopher Ferris570b76f2017-06-30 17:18:16 -070037#include "ElfTestUtils.h"
Christopher Ferrisd226a512017-07-14 10:37:19 -070038
39namespace unwindstack {
Christopher Ferris570b76f2017-06-30 17:18:16 -070040
41class MapInfoGetElfTest : public ::testing::Test {
42 protected:
43 void SetUp() override {
44 map_ = mmap(nullptr, kMapSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
45 ASSERT_NE(MAP_FAILED, map_);
46
47 uint64_t start = reinterpret_cast<uint64_t>(map_);
48 info_.reset(new MapInfo{.start = start, .end = start + 1024, .offset = 0, .name = ""});
49 }
50
51 void TearDown() override { munmap(map_, kMapSize); }
52
53 const size_t kMapSize = 4096;
54
55 void* map_ = nullptr;
56 std::unique_ptr<MapInfo> info_;
57};
58
59TEST_F(MapInfoGetElfTest, invalid) {
60 // The map is empty, but this should still create an invalid elf object.
61 std::unique_ptr<Elf> elf(info_->GetElf(getpid(), false));
62 ASSERT_TRUE(elf.get() != nullptr);
63 ASSERT_FALSE(elf->valid());
64}
65
66TEST_F(MapInfoGetElfTest, valid32) {
67 Elf32_Ehdr ehdr;
68 TestInitEhdr<Elf32_Ehdr>(&ehdr, ELFCLASS32, EM_ARM);
69 memcpy(map_, &ehdr, sizeof(ehdr));
70
71 std::unique_ptr<Elf> elf(info_->GetElf(getpid(), false));
72 ASSERT_TRUE(elf.get() != nullptr);
73 ASSERT_TRUE(elf->valid());
74 EXPECT_EQ(static_cast<uint32_t>(EM_ARM), elf->machine_type());
75 EXPECT_EQ(ELFCLASS32, elf->class_type());
76}
77
78TEST_F(MapInfoGetElfTest, valid64) {
79 Elf64_Ehdr ehdr;
80 TestInitEhdr<Elf64_Ehdr>(&ehdr, ELFCLASS64, EM_AARCH64);
81 memcpy(map_, &ehdr, sizeof(ehdr));
82
83 std::unique_ptr<Elf> elf(info_->GetElf(getpid(), false));
84 ASSERT_TRUE(elf.get() != nullptr);
85 ASSERT_TRUE(elf->valid());
86 EXPECT_EQ(static_cast<uint32_t>(EM_AARCH64), elf->machine_type());
87 EXPECT_EQ(ELFCLASS64, elf->class_type());
88}
89
90TEST_F(MapInfoGetElfTest, gnu_debugdata_do_not_init32) {
91 TestInitGnuDebugdata<Elf32_Ehdr, Elf32_Shdr>(
92 ELFCLASS32, EM_ARM, false, [&](uint64_t offset, const void* ptr, size_t size) {
93 memcpy(&reinterpret_cast<uint8_t*>(map_)[offset], ptr, size);
94 });
95
96 std::unique_ptr<Elf> elf(info_->GetElf(getpid(), false));
97 ASSERT_TRUE(elf.get() != nullptr);
98 ASSERT_TRUE(elf->valid());
99 EXPECT_EQ(static_cast<uint32_t>(EM_ARM), elf->machine_type());
100 EXPECT_EQ(ELFCLASS32, elf->class_type());
101 EXPECT_TRUE(elf->gnu_debugdata_interface() == nullptr);
102}
103
104TEST_F(MapInfoGetElfTest, gnu_debugdata_do_not_init64) {
105 TestInitGnuDebugdata<Elf64_Ehdr, Elf64_Shdr>(
106 ELFCLASS64, EM_AARCH64, false, [&](uint64_t offset, const void* ptr, size_t size) {
107 memcpy(&reinterpret_cast<uint8_t*>(map_)[offset], ptr, size);
108 });
109
110 std::unique_ptr<Elf> elf(info_->GetElf(getpid(), false));
111 ASSERT_TRUE(elf.get() != nullptr);
112 ASSERT_TRUE(elf->valid());
113 EXPECT_EQ(static_cast<uint32_t>(EM_AARCH64), elf->machine_type());
114 EXPECT_EQ(ELFCLASS64, elf->class_type());
115 EXPECT_TRUE(elf->gnu_debugdata_interface() == nullptr);
116}
117
118TEST_F(MapInfoGetElfTest, gnu_debugdata_init32) {
119 TestInitGnuDebugdata<Elf32_Ehdr, Elf32_Shdr>(
120 ELFCLASS32, EM_ARM, true, [&](uint64_t offset, const void* ptr, size_t size) {
121 memcpy(&reinterpret_cast<uint8_t*>(map_)[offset], ptr, size);
122 });
123
124 std::unique_ptr<Elf> elf(info_->GetElf(getpid(), true));
125 ASSERT_TRUE(elf.get() != nullptr);
126 ASSERT_TRUE(elf->valid());
127 EXPECT_EQ(static_cast<uint32_t>(EM_ARM), elf->machine_type());
128 EXPECT_EQ(ELFCLASS32, elf->class_type());
129 EXPECT_TRUE(elf->gnu_debugdata_interface() != nullptr);
130}
131
132TEST_F(MapInfoGetElfTest, gnu_debugdata_init64) {
133 TestInitGnuDebugdata<Elf64_Ehdr, Elf64_Shdr>(
134 ELFCLASS64, EM_AARCH64, true, [&](uint64_t offset, const void* ptr, size_t size) {
135 memcpy(&reinterpret_cast<uint8_t*>(map_)[offset], ptr, size);
136 });
137
138 std::unique_ptr<Elf> elf(info_->GetElf(getpid(), true));
139 ASSERT_TRUE(elf.get() != nullptr);
140 ASSERT_TRUE(elf->valid());
141 EXPECT_EQ(static_cast<uint32_t>(EM_AARCH64), elf->machine_type());
142 EXPECT_EQ(ELFCLASS64, elf->class_type());
143 EXPECT_TRUE(elf->gnu_debugdata_interface() != nullptr);
144}
Christopher Ferrisd226a512017-07-14 10:37:19 -0700145
146} // namespace unwindstack