Load dex files from ART-specific data structure.
Fixes cdex which was recently changed to have shared data section,
which means the DEX PC cannot be used to find the right symbol,
as the bytecode is no longer within the dex file, and in-fact,
we might have to scan multiple dex files to find the method.
Bug: 72520014
Test: testrunner.py --host --cdex-none -t 137
Test: testrunner.py --host --cdex-fast -t 137
Test: All unit tests pass.
Change-Id: I80265d05ad69dd9cefbe3f8a75e4cd349002af5e
diff --git a/libunwindstack/tests/DexFilesTest.cpp b/libunwindstack/tests/DexFilesTest.cpp
new file mode 100644
index 0000000..dca5605
--- /dev/null
+++ b/libunwindstack/tests/DexFilesTest.cpp
@@ -0,0 +1,311 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <elf.h>
+#include <string.h>
+
+#include <memory>
+#include <vector>
+
+#include <gtest/gtest.h>
+
+#include <unwindstack/DexFiles.h>
+#include <unwindstack/Elf.h>
+#include <unwindstack/MapInfo.h>
+#include <unwindstack/Maps.h>
+#include <unwindstack/Memory.h>
+
+#include "DexFileData.h"
+#include "ElfFake.h"
+#include "MemoryFake.h"
+
+namespace unwindstack {
+
+class DexFilesTest : public ::testing::Test {
+ protected:
+ void SetUp() override {
+ memory_ = new MemoryFake;
+ process_memory_.reset(memory_);
+
+ dex_files_.reset(new DexFiles(process_memory_));
+ dex_files_->SetArch(ARCH_ARM);
+
+ maps_.reset(
+ new BufferMaps("1000-4000 ---s 00000000 00:00 0\n"
+ "4000-6000 r--s 00000000 00:00 0\n"
+ "6000-8000 -w-s 00000000 00:00 0\n"
+ "a000-c000 r-xp 00000000 00:00 0\n"
+ "c000-f000 rwxp 00000000 00:00 0\n"
+ "f000-11000 r-xp 00000000 00:00 0\n"
+ "100000-110000 rw-p 0000000 00:00 0\n"
+ "200000-210000 rw-p 0000000 00:00 0\n"
+ "300000-400000 rw-p 0000000 00:00 0\n"));
+ ASSERT_TRUE(maps_->Parse());
+
+ // Global variable in a section that is not readable/executable.
+ MapInfo* map_info = maps_->Get(kMapGlobalNonReadableExectable);
+ ASSERT_TRUE(map_info != nullptr);
+ MemoryFake* memory = new MemoryFake;
+ ElfFake* elf = new ElfFake(memory);
+ elf->FakeSetValid(true);
+ ElfInterfaceFake* interface = new ElfInterfaceFake(memory);
+ elf->FakeSetInterface(interface);
+ interface->FakeSetGlobalVariable("__art_debug_dexfiles", 0x800);
+ map_info->elf.reset(elf);
+
+ // Global variable not set by default.
+ map_info = maps_->Get(kMapGlobalSetToZero);
+ ASSERT_TRUE(map_info != nullptr);
+ memory = new MemoryFake;
+ elf = new ElfFake(memory);
+ elf->FakeSetValid(true);
+ interface = new ElfInterfaceFake(memory);
+ elf->FakeSetInterface(interface);
+ interface->FakeSetGlobalVariable("__art_debug_dexfiles", 0x800);
+ map_info->elf.reset(elf);
+
+ // Global variable set in this map.
+ map_info = maps_->Get(kMapGlobal);
+ ASSERT_TRUE(map_info != nullptr);
+ memory = new MemoryFake;
+ elf = new ElfFake(memory);
+ elf->FakeSetValid(true);
+ interface = new ElfInterfaceFake(memory);
+ elf->FakeSetInterface(interface);
+ interface->FakeSetGlobalVariable("__art_debug_dexfiles", 0x800);
+ map_info->elf.reset(elf);
+ }
+
+ void WriteEntry32(uint64_t entry_addr, uint32_t next, uint32_t prev, uint32_t dex_file);
+ void WriteEntry64(uint64_t entry_addr, uint64_t next, uint64_t prev, uint64_t dex_file);
+ void WriteDex(uint64_t dex_file);
+
+ static constexpr size_t kMapGlobalNonReadableExectable = 3;
+ static constexpr size_t kMapGlobalSetToZero = 4;
+ static constexpr size_t kMapGlobal = 5;
+ static constexpr size_t kMapDexFileEntries = 7;
+ static constexpr size_t kMapDexFiles = 8;
+
+ std::shared_ptr<Memory> process_memory_;
+ MemoryFake* memory_;
+ std::unique_ptr<DexFiles> dex_files_;
+ std::unique_ptr<BufferMaps> maps_;
+};
+
+void DexFilesTest::WriteEntry32(uint64_t entry_addr, uint32_t next, uint32_t prev,
+ uint32_t dex_file) {
+ // Format of the 32 bit DEXFileEntry structure:
+ // uint32_t next
+ memory_->SetData32(entry_addr, next);
+ // uint32_t prev
+ memory_->SetData32(entry_addr + 4, prev);
+ // uint32_t dex_file
+ memory_->SetData32(entry_addr + 8, dex_file);
+}
+
+void DexFilesTest::WriteEntry64(uint64_t entry_addr, uint64_t next, uint64_t prev,
+ uint64_t dex_file) {
+ // Format of the 64 bit DEXFileEntry structure:
+ // uint64_t next
+ memory_->SetData64(entry_addr, next);
+ // uint64_t prev
+ memory_->SetData64(entry_addr + 8, prev);
+ // uint64_t dex_file
+ memory_->SetData64(entry_addr + 16, dex_file);
+}
+
+void DexFilesTest::WriteDex(uint64_t dex_file) {
+ memory_->SetMemory(dex_file, kDexData, sizeof(kDexData) * sizeof(uint32_t));
+}
+
+TEST_F(DexFilesTest, get_method_information_invalid) {
+ std::string method_name = "nothing";
+ uint64_t method_offset = 0x124;
+ MapInfo* info = maps_->Get(kMapDexFileEntries);
+
+ dex_files_->GetMethodInformation(maps_.get(), info, 0, &method_name, &method_offset);
+ EXPECT_EQ("nothing", method_name);
+ EXPECT_EQ(0x124U, method_offset);
+}
+
+TEST_F(DexFilesTest, get_method_information_32) {
+ std::string method_name = "nothing";
+ uint64_t method_offset = 0x124;
+ MapInfo* info = maps_->Get(kMapDexFiles);
+
+ memory_->SetData32(0xf800, 0x200000);
+ WriteEntry32(0x200000, 0, 0, 0x300000);
+ WriteDex(0x300000);
+
+ dex_files_->GetMethodInformation(maps_.get(), info, 0x300100, &method_name, &method_offset);
+ EXPECT_EQ("Main.<init>", method_name);
+ EXPECT_EQ(0U, method_offset);
+}
+
+TEST_F(DexFilesTest, get_method_information_64) {
+ std::string method_name = "nothing";
+ uint64_t method_offset = 0x124;
+ MapInfo* info = maps_->Get(kMapDexFiles);
+
+ dex_files_->SetArch(ARCH_ARM64);
+ memory_->SetData64(0xf800, 0x200000);
+ WriteEntry64(0x200000, 0, 0, 0x301000);
+ WriteDex(0x301000);
+
+ dex_files_->GetMethodInformation(maps_.get(), info, 0x301102, &method_name, &method_offset);
+ EXPECT_EQ("Main.<init>", method_name);
+ EXPECT_EQ(2U, method_offset);
+}
+
+TEST_F(DexFilesTest, get_method_information_not_first_entry_32) {
+ std::string method_name = "nothing";
+ uint64_t method_offset = 0x124;
+ MapInfo* info = maps_->Get(kMapDexFiles);
+
+ memory_->SetData32(0xf800, 0x200000);
+ WriteEntry32(0x200000, 0x200100, 0, 0x100000);
+ WriteEntry32(0x200100, 0, 0x200000, 0x300000);
+ WriteDex(0x300000);
+
+ dex_files_->GetMethodInformation(maps_.get(), info, 0x300104, &method_name, &method_offset);
+ EXPECT_EQ("Main.<init>", method_name);
+ EXPECT_EQ(4U, method_offset);
+}
+
+TEST_F(DexFilesTest, get_method_information_not_first_entry_64) {
+ std::string method_name = "nothing";
+ uint64_t method_offset = 0x124;
+ MapInfo* info = maps_->Get(kMapDexFiles);
+
+ dex_files_->SetArch(ARCH_ARM64);
+ memory_->SetData64(0xf800, 0x200000);
+ WriteEntry64(0x200000, 0x200100, 0, 0x100000);
+ WriteEntry64(0x200100, 0, 0x200000, 0x300000);
+ WriteDex(0x300000);
+
+ dex_files_->GetMethodInformation(maps_.get(), info, 0x300106, &method_name, &method_offset);
+ EXPECT_EQ("Main.<init>", method_name);
+ EXPECT_EQ(6U, method_offset);
+}
+
+TEST_F(DexFilesTest, get_method_information_cached) {
+ std::string method_name = "nothing";
+ uint64_t method_offset = 0x124;
+ MapInfo* info = maps_->Get(kMapDexFiles);
+
+ memory_->SetData32(0xf800, 0x200000);
+ WriteEntry32(0x200000, 0, 0, 0x300000);
+ WriteDex(0x300000);
+
+ dex_files_->GetMethodInformation(maps_.get(), info, 0x300100, &method_name, &method_offset);
+ EXPECT_EQ("Main.<init>", method_name);
+ EXPECT_EQ(0U, method_offset);
+
+ // Clear all memory and make sure that data is acquired from the cache.
+ memory_->Clear();
+ dex_files_->GetMethodInformation(maps_.get(), info, 0x300100, &method_name, &method_offset);
+ EXPECT_EQ("Main.<init>", method_name);
+ EXPECT_EQ(0U, method_offset);
+}
+
+TEST_F(DexFilesTest, get_method_information_search_libs) {
+ std::string method_name = "nothing";
+ uint64_t method_offset = 0x124;
+ MapInfo* info = maps_->Get(kMapDexFiles);
+
+ memory_->SetData32(0xf800, 0x200000);
+ WriteEntry32(0x200000, 0x200100, 0, 0x100000);
+ WriteEntry32(0x200100, 0, 0x200000, 0x300000);
+ WriteDex(0x300000);
+
+ // Only search a given named list of libs.
+ std::vector<std::string> libs{"libart.so"};
+ dex_files_.reset(new DexFiles(process_memory_, libs));
+ dex_files_->SetArch(ARCH_ARM);
+
+ dex_files_->GetMethodInformation(maps_.get(), info, 0x300104, &method_name, &method_offset);
+ EXPECT_EQ("nothing", method_name);
+ EXPECT_EQ(0x124U, method_offset);
+
+ MapInfo* map_info = maps_->Get(kMapGlobal);
+ map_info->name = "/system/lib/libart.so";
+ dex_files_.reset(new DexFiles(process_memory_, libs));
+ dex_files_->SetArch(ARCH_ARM);
+ // Make sure that clearing out copy of the libs doesn't affect the
+ // DexFiles object.
+ libs.clear();
+
+ dex_files_->GetMethodInformation(maps_.get(), info, 0x300104, &method_name, &method_offset);
+ EXPECT_EQ("Main.<init>", method_name);
+ EXPECT_EQ(4U, method_offset);
+}
+
+TEST_F(DexFilesTest, get_method_information_global_skip_zero_32) {
+ std::string method_name = "nothing";
+ uint64_t method_offset = 0x124;
+ MapInfo* info = maps_->Get(kMapDexFiles);
+
+ // First global variable found, but value is zero.
+ memory_->SetData32(0xc800, 0);
+
+ memory_->SetData32(0xf800, 0x200000);
+ WriteEntry32(0x200000, 0, 0, 0x300000);
+ WriteDex(0x300000);
+
+ dex_files_->GetMethodInformation(maps_.get(), info, 0x300100, &method_name, &method_offset);
+ EXPECT_EQ("Main.<init>", method_name);
+ EXPECT_EQ(0U, method_offset);
+
+ // Verify that second is ignored when first is set to non-zero
+ dex_files_.reset(new DexFiles(process_memory_));
+ dex_files_->SetArch(ARCH_ARM);
+ method_name = "fail";
+ method_offset = 0x123;
+ memory_->SetData32(0xc800, 0x100000);
+ dex_files_->GetMethodInformation(maps_.get(), info, 0x300100, &method_name, &method_offset);
+ EXPECT_EQ("fail", method_name);
+ EXPECT_EQ(0x123U, method_offset);
+}
+
+TEST_F(DexFilesTest, get_method_information_global_skip_zero_64) {
+ std::string method_name = "nothing";
+ uint64_t method_offset = 0x124;
+ MapInfo* info = maps_->Get(kMapDexFiles);
+
+ // First global variable found, but value is zero.
+ memory_->SetData64(0xc800, 0);
+
+ memory_->SetData64(0xf800, 0x200000);
+ WriteEntry64(0x200000, 0, 0, 0x300000);
+ WriteDex(0x300000);
+
+ dex_files_->SetArch(ARCH_ARM64);
+ dex_files_->GetMethodInformation(maps_.get(), info, 0x300100, &method_name, &method_offset);
+ EXPECT_EQ("Main.<init>", method_name);
+ EXPECT_EQ(0U, method_offset);
+
+ // Verify that second is ignored when first is set to non-zero
+ dex_files_.reset(new DexFiles(process_memory_));
+ dex_files_->SetArch(ARCH_ARM64);
+ method_name = "fail";
+ method_offset = 0x123;
+ memory_->SetData32(0xc800, 0x100000);
+ dex_files_->GetMethodInformation(maps_.get(), info, 0x300100, &method_name, &method_offset);
+ EXPECT_EQ("fail", method_name);
+ EXPECT_EQ(0x123U, method_offset);
+}
+
+} // namespace unwindstack