196 lines
6.6 KiB
C++
196 lines
6.6 KiB
C++
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <stdint.h>
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#include <sys/mman.h>
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#include <thread>
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#include <gtest/gtest.h>
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#include <unwindstack/MapInfo.h>
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#include <unwindstack/Maps.h>
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#include "ElfFake.h"
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namespace unwindstack {
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TEST(MapInfoTest, maps_constructor_const_char) {
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auto prev_map = MapInfo::Create(0, 0, 0, 0, "");
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auto map_info = MapInfo::Create(prev_map, 1, 2, 3, 4, "map");
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EXPECT_EQ(prev_map.get(), map_info->prev_map().get());
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EXPECT_EQ(1UL, map_info->start());
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EXPECT_EQ(2UL, map_info->end());
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EXPECT_EQ(3UL, map_info->offset());
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EXPECT_EQ(4UL, map_info->flags());
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EXPECT_EQ("map", map_info->name());
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EXPECT_EQ(UINT64_MAX, map_info->load_bias());
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EXPECT_EQ(0UL, map_info->elf_offset());
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EXPECT_TRUE(map_info->elf().get() == nullptr);
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}
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TEST(MapInfoTest, maps_constructor_string) {
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std::string name("string_map");
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auto prev_map = MapInfo::Create(0, 0, 0, 0, "");
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auto map_info = MapInfo::Create(prev_map, 1, 2, 3, 4, name);
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EXPECT_EQ(prev_map, map_info->prev_map());
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EXPECT_EQ(1UL, map_info->start());
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EXPECT_EQ(2UL, map_info->end());
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EXPECT_EQ(3UL, map_info->offset());
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EXPECT_EQ(4UL, map_info->flags());
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EXPECT_EQ("string_map", map_info->name());
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EXPECT_EQ(UINT64_MAX, map_info->load_bias());
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EXPECT_EQ(0UL, map_info->elf_offset());
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EXPECT_TRUE(map_info->elf().get() == nullptr);
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}
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TEST(MapInfoTest, real_map_check) {
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auto map1 = MapInfo::Create(0, 0x1000, 0, PROT_READ, "fake.so");
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auto map2 = MapInfo::Create(map1, 0, 0, 0, 0, "");
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auto map3 = MapInfo::Create(map2, 0x1000, 0x2000, 0x1000, PROT_READ | PROT_EXEC, "fake.so");
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EXPECT_EQ(nullptr, map1->prev_map());
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EXPECT_EQ(nullptr, map1->GetPrevRealMap());
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EXPECT_EQ(map2, map1->next_map());
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EXPECT_EQ(map3, map1->GetNextRealMap());
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EXPECT_EQ(map1, map2->prev_map());
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EXPECT_EQ(nullptr, map2->GetPrevRealMap());
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EXPECT_EQ(map3, map2->next_map());
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EXPECT_EQ(nullptr, map2->GetNextRealMap());
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EXPECT_EQ(map2, map3->prev_map());
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EXPECT_EQ(map1, map3->GetPrevRealMap());
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EXPECT_EQ(nullptr, map3->next_map());
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EXPECT_EQ(nullptr, map3->GetNextRealMap());
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// Verify that if the middle map is not blank, then the Get{Next,Prev}RealMap
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// functions return nullptrs.
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map2->set_offset(1);
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EXPECT_EQ(nullptr, map1->GetPrevRealMap());
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EXPECT_EQ(nullptr, map1->GetNextRealMap());
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EXPECT_EQ(nullptr, map3->GetPrevRealMap());
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EXPECT_EQ(nullptr, map3->GetNextRealMap());
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map2->set_offset(0);
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EXPECT_EQ(map3, map1->GetNextRealMap());
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map2->set_flags(1);
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EXPECT_EQ(nullptr, map1->GetPrevRealMap());
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EXPECT_EQ(nullptr, map1->GetNextRealMap());
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EXPECT_EQ(nullptr, map3->GetPrevRealMap());
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EXPECT_EQ(nullptr, map3->GetNextRealMap());
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map2->set_flags(0);
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EXPECT_EQ(map3, map1->GetNextRealMap());
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map2->set_name("something");
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EXPECT_EQ(nullptr, map1->GetPrevRealMap());
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EXPECT_EQ(nullptr, map1->GetNextRealMap());
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EXPECT_EQ(nullptr, map3->GetPrevRealMap());
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EXPECT_EQ(nullptr, map3->GetNextRealMap());
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map2->set_name("");
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EXPECT_EQ(map3, map1->GetNextRealMap());
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// Verify that if the Get{Next,Prev}RealMap names must match.
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map1->set_name("another");
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EXPECT_EQ(nullptr, map1->GetPrevRealMap());
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EXPECT_EQ(nullptr, map1->GetNextRealMap());
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EXPECT_EQ(nullptr, map3->GetPrevRealMap());
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EXPECT_EQ(nullptr, map3->GetNextRealMap());
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map1->set_name("fake.so");
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EXPECT_EQ(map3, map1->GetNextRealMap());
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map3->set_name("another");
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EXPECT_EQ(nullptr, map1->GetPrevRealMap());
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EXPECT_EQ(nullptr, map1->GetNextRealMap());
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EXPECT_EQ(nullptr, map3->GetPrevRealMap());
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EXPECT_EQ(nullptr, map3->GetNextRealMap());
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map3->set_name("fake.so");
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EXPECT_EQ(map3, map1->GetNextRealMap());
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}
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TEST(MapInfoTest, get_function_name) {
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ElfFake* elf = new ElfFake(nullptr);
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ElfInterfaceFake* interface = new ElfInterfaceFake(nullptr);
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elf->FakeSetInterface(interface);
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interface->FakePushFunctionData(FunctionData("function", 1000));
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auto map_info = MapInfo::Create(1, 2, 3, 4, "");
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map_info->set_elf(elf);
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SharedString name;
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uint64_t offset;
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ASSERT_TRUE(map_info->GetFunctionName(1000, &name, &offset));
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EXPECT_EQ("function", name);
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EXPECT_EQ(1000UL, offset);
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}
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TEST(MapInfoTest, multiple_thread_get_elf_fields) {
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auto map_info = MapInfo::Create(0, 0, 0, 0, "");
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static constexpr size_t kNumConcurrentThreads = 100;
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MapInfo::ElfFields* elf_fields[kNumConcurrentThreads];
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std::atomic_bool wait;
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wait = true;
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// Create all of the threads and have them do the call at the same time
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// to make it likely that a race will occur.
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std::vector<std::thread*> threads;
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for (size_t i = 0; i < kNumConcurrentThreads; i++) {
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std::thread* thread = new std::thread([i, &wait, &map_info, &elf_fields]() {
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while (wait)
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;
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elf_fields[i] = &map_info->GetElfFields();
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});
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threads.push_back(thread);
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}
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// Set them all going and wait for the threads to finish.
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wait = false;
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for (auto thread : threads) {
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thread->join();
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delete thread;
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}
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// Now verify that all of elf fields are exactly the same and valid.
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MapInfo::ElfFields* expected_elf_fields = &map_info->GetElfFields();
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ASSERT_TRUE(expected_elf_fields != nullptr);
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for (size_t i = 0; i < kNumConcurrentThreads; i++) {
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EXPECT_EQ(expected_elf_fields, elf_fields[i]) << "Thread " << i << " mismatched.";
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}
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}
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TEST(MapInfoTest, elf_file_not_readable) {
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auto map_info_readable = MapInfo::Create(0, 0x1000, 0, PROT_READ, "fake.so");
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map_info_readable->set_memory_backed_elf(true);
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ASSERT_TRUE(map_info_readable->ElfFileNotReadable());
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auto map_info_no_name = MapInfo::Create(0, 0x1000, 0, PROT_READ, "");
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map_info_no_name->set_memory_backed_elf(true);
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ASSERT_FALSE(map_info_no_name->ElfFileNotReadable());
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auto map_info_bracket = MapInfo::Create(0, 0x2000, 0, PROT_READ, "[vdso]");
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map_info_bracket->set_memory_backed_elf(true);
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ASSERT_FALSE(map_info_bracket->ElfFileNotReadable());
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auto map_info_memfd = MapInfo::Create(0, 0x3000, 0, PROT_READ, "/memfd:jit-cache");
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map_info_memfd->set_memory_backed_elf(true);
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ASSERT_FALSE(map_info_memfd->ElfFileNotReadable());
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}
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} // namespace unwindstack
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