Christopher Ferris | 3958f80 | 2017-02-01 15:44:40 -0800 | [diff] [blame] | 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 <elf.h> |
| 18 | |
| 19 | #include <gtest/gtest.h> |
| 20 | |
| 21 | #include <vector> |
| 22 | |
Christopher Ferris | d226a51 | 2017-07-14 10:37:19 -0700 | [diff] [blame^] | 23 | #include <unwindstack/Regs.h> |
| 24 | |
Christopher Ferris | 3958f80 | 2017-02-01 15:44:40 -0800 | [diff] [blame] | 25 | #include "ElfInterfaceArm.h" |
| 26 | #include "Machine.h" |
Christopher Ferris | 3958f80 | 2017-02-01 15:44:40 -0800 | [diff] [blame] | 27 | |
| 28 | #include "MemoryFake.h" |
| 29 | |
Christopher Ferris | d226a51 | 2017-07-14 10:37:19 -0700 | [diff] [blame^] | 30 | namespace unwindstack { |
| 31 | |
Christopher Ferris | 3958f80 | 2017-02-01 15:44:40 -0800 | [diff] [blame] | 32 | class ElfInterfaceArmTest : public ::testing::Test { |
| 33 | protected: |
| 34 | void SetUp() override { |
| 35 | memory_.Clear(); |
| 36 | process_memory_.Clear(); |
| 37 | } |
| 38 | |
| 39 | MemoryFake memory_; |
| 40 | MemoryFake process_memory_; |
| 41 | }; |
| 42 | |
| 43 | TEST_F(ElfInterfaceArmTest, GetPrel32Addr) { |
| 44 | ElfInterfaceArm interface(&memory_); |
| 45 | memory_.SetData32(0x1000, 0x230000); |
| 46 | |
| 47 | uint32_t value; |
| 48 | ASSERT_TRUE(interface.GetPrel31Addr(0x1000, &value)); |
| 49 | ASSERT_EQ(0x231000U, value); |
| 50 | |
| 51 | memory_.SetData32(0x1000, 0x80001000); |
| 52 | ASSERT_TRUE(interface.GetPrel31Addr(0x1000, &value)); |
| 53 | ASSERT_EQ(0x2000U, value); |
| 54 | |
| 55 | memory_.SetData32(0x1000, 0x70001000); |
| 56 | ASSERT_TRUE(interface.GetPrel31Addr(0x1000, &value)); |
| 57 | ASSERT_EQ(0xf0002000U, value); |
| 58 | } |
| 59 | |
| 60 | TEST_F(ElfInterfaceArmTest, FindEntry_start_zero) { |
| 61 | ElfInterfaceArm interface(&memory_); |
| 62 | interface.set_start_offset(0); |
| 63 | interface.set_total_entries(10); |
| 64 | |
| 65 | uint64_t entry_offset; |
| 66 | ASSERT_FALSE(interface.FindEntry(0x1000, &entry_offset)); |
| 67 | } |
| 68 | |
| 69 | TEST_F(ElfInterfaceArmTest, FindEntry_no_entries) { |
| 70 | ElfInterfaceArm interface(&memory_); |
| 71 | interface.set_start_offset(0x100); |
| 72 | interface.set_total_entries(0); |
| 73 | |
| 74 | uint64_t entry_offset; |
| 75 | ASSERT_FALSE(interface.FindEntry(0x1000, &entry_offset)); |
| 76 | } |
| 77 | |
| 78 | TEST_F(ElfInterfaceArmTest, FindEntry_no_valid_memory) { |
| 79 | ElfInterfaceArm interface(&memory_); |
| 80 | interface.set_start_offset(0x100); |
| 81 | interface.set_total_entries(2); |
| 82 | |
| 83 | uint64_t entry_offset; |
| 84 | ASSERT_FALSE(interface.FindEntry(0x1000, &entry_offset)); |
| 85 | } |
| 86 | |
| 87 | TEST_F(ElfInterfaceArmTest, FindEntry_ip_before_first) { |
| 88 | ElfInterfaceArm interface(&memory_); |
| 89 | interface.set_start_offset(0x1000); |
| 90 | interface.set_total_entries(1); |
| 91 | memory_.SetData32(0x1000, 0x6000); |
| 92 | |
| 93 | uint64_t entry_offset; |
| 94 | ASSERT_FALSE(interface.FindEntry(0x1000, &entry_offset)); |
| 95 | } |
| 96 | |
| 97 | TEST_F(ElfInterfaceArmTest, FindEntry_single_entry_negative_value) { |
| 98 | ElfInterfaceArm interface(&memory_); |
| 99 | interface.set_start_offset(0x8000); |
| 100 | interface.set_total_entries(1); |
| 101 | memory_.SetData32(0x8000, 0x7fffff00); |
| 102 | |
| 103 | uint64_t entry_offset; |
| 104 | ASSERT_TRUE(interface.FindEntry(0x7ff0, &entry_offset)); |
| 105 | ASSERT_EQ(0x8000U, entry_offset); |
| 106 | } |
| 107 | |
| 108 | TEST_F(ElfInterfaceArmTest, FindEntry_two_entries) { |
| 109 | ElfInterfaceArm interface(&memory_); |
| 110 | interface.set_start_offset(0x1000); |
| 111 | interface.set_total_entries(2); |
| 112 | memory_.SetData32(0x1000, 0x6000); |
| 113 | memory_.SetData32(0x1008, 0x7000); |
| 114 | |
| 115 | uint64_t entry_offset; |
| 116 | ASSERT_TRUE(interface.FindEntry(0x7000, &entry_offset)); |
| 117 | ASSERT_EQ(0x1000U, entry_offset); |
| 118 | } |
| 119 | |
| 120 | |
| 121 | TEST_F(ElfInterfaceArmTest, FindEntry_last_check_single_entry) { |
| 122 | ElfInterfaceArm interface(&memory_); |
| 123 | interface.set_start_offset(0x1000); |
| 124 | interface.set_total_entries(1); |
| 125 | memory_.SetData32(0x1000, 0x6000); |
| 126 | |
| 127 | uint64_t entry_offset; |
| 128 | ASSERT_TRUE(interface.FindEntry(0x7000, &entry_offset)); |
| 129 | ASSERT_EQ(0x1000U, entry_offset); |
| 130 | |
| 131 | // To guarantee that we are using the cache on the second run, |
| 132 | // set the memory to a different value. |
| 133 | memory_.SetData32(0x1000, 0x8000); |
| 134 | ASSERT_TRUE(interface.FindEntry(0x7004, &entry_offset)); |
| 135 | ASSERT_EQ(0x1000U, entry_offset); |
| 136 | } |
| 137 | |
| 138 | TEST_F(ElfInterfaceArmTest, FindEntry_last_check_multiple_entries) { |
| 139 | ElfInterfaceArm interface(&memory_); |
| 140 | interface.set_start_offset(0x1000); |
| 141 | interface.set_total_entries(2); |
| 142 | memory_.SetData32(0x1000, 0x6000); |
| 143 | memory_.SetData32(0x1008, 0x8000); |
| 144 | |
| 145 | uint64_t entry_offset; |
| 146 | ASSERT_TRUE(interface.FindEntry(0x9008, &entry_offset)); |
| 147 | ASSERT_EQ(0x1008U, entry_offset); |
| 148 | |
| 149 | // To guarantee that we are using the cache on the second run, |
| 150 | // set the memory to a different value. |
| 151 | memory_.SetData32(0x1000, 0x16000); |
| 152 | memory_.SetData32(0x1008, 0x18000); |
| 153 | ASSERT_TRUE(interface.FindEntry(0x9100, &entry_offset)); |
| 154 | ASSERT_EQ(0x1008U, entry_offset); |
| 155 | } |
| 156 | |
| 157 | TEST_F(ElfInterfaceArmTest, FindEntry_multiple_entries_even) { |
| 158 | ElfInterfaceArm interface(&memory_); |
| 159 | interface.set_start_offset(0x1000); |
| 160 | interface.set_total_entries(4); |
| 161 | memory_.SetData32(0x1000, 0x6000); |
| 162 | memory_.SetData32(0x1008, 0x7000); |
| 163 | memory_.SetData32(0x1010, 0x8000); |
| 164 | memory_.SetData32(0x1018, 0x9000); |
| 165 | |
| 166 | uint64_t entry_offset; |
| 167 | ASSERT_TRUE(interface.FindEntry(0x9100, &entry_offset)); |
| 168 | ASSERT_EQ(0x1010U, entry_offset); |
| 169 | |
| 170 | // To guarantee that we are using the cache on the second run, |
| 171 | // set the memory to a different value. |
| 172 | memory_.SetData32(0x1000, 0x16000); |
| 173 | memory_.SetData32(0x1008, 0x17000); |
| 174 | memory_.SetData32(0x1010, 0x18000); |
| 175 | memory_.SetData32(0x1018, 0x19000); |
| 176 | ASSERT_TRUE(interface.FindEntry(0x9100, &entry_offset)); |
| 177 | ASSERT_EQ(0x1010U, entry_offset); |
| 178 | } |
| 179 | |
| 180 | TEST_F(ElfInterfaceArmTest, FindEntry_multiple_entries_odd) { |
| 181 | ElfInterfaceArm interface(&memory_); |
| 182 | interface.set_start_offset(0x1000); |
| 183 | interface.set_total_entries(5); |
| 184 | memory_.SetData32(0x1000, 0x5000); |
| 185 | memory_.SetData32(0x1008, 0x6000); |
| 186 | memory_.SetData32(0x1010, 0x7000); |
| 187 | memory_.SetData32(0x1018, 0x8000); |
| 188 | memory_.SetData32(0x1020, 0x9000); |
| 189 | |
| 190 | uint64_t entry_offset; |
| 191 | ASSERT_TRUE(interface.FindEntry(0x8100, &entry_offset)); |
| 192 | ASSERT_EQ(0x1010U, entry_offset); |
| 193 | |
| 194 | // To guarantee that we are using the cache on the second run, |
| 195 | // set the memory to a different value. |
| 196 | memory_.SetData32(0x1000, 0x15000); |
| 197 | memory_.SetData32(0x1008, 0x16000); |
| 198 | memory_.SetData32(0x1010, 0x17000); |
| 199 | memory_.SetData32(0x1018, 0x18000); |
| 200 | memory_.SetData32(0x1020, 0x19000); |
| 201 | ASSERT_TRUE(interface.FindEntry(0x8100, &entry_offset)); |
| 202 | ASSERT_EQ(0x1010U, entry_offset); |
| 203 | } |
| 204 | |
| 205 | TEST_F(ElfInterfaceArmTest, iterate) { |
| 206 | ElfInterfaceArm interface(&memory_); |
| 207 | interface.set_start_offset(0x1000); |
| 208 | interface.set_total_entries(5); |
| 209 | memory_.SetData32(0x1000, 0x5000); |
| 210 | memory_.SetData32(0x1008, 0x6000); |
| 211 | memory_.SetData32(0x1010, 0x7000); |
| 212 | memory_.SetData32(0x1018, 0x8000); |
| 213 | memory_.SetData32(0x1020, 0x9000); |
| 214 | |
| 215 | std::vector<uint32_t> entries; |
| 216 | for (auto addr : interface) { |
| 217 | entries.push_back(addr); |
| 218 | } |
| 219 | ASSERT_EQ(5U, entries.size()); |
| 220 | ASSERT_EQ(0x6000U, entries[0]); |
| 221 | ASSERT_EQ(0x7008U, entries[1]); |
| 222 | ASSERT_EQ(0x8010U, entries[2]); |
| 223 | ASSERT_EQ(0x9018U, entries[3]); |
| 224 | ASSERT_EQ(0xa020U, entries[4]); |
| 225 | |
| 226 | // Make sure the iterate cached the entries. |
| 227 | memory_.SetData32(0x1000, 0x11000); |
| 228 | memory_.SetData32(0x1008, 0x12000); |
| 229 | memory_.SetData32(0x1010, 0x13000); |
| 230 | memory_.SetData32(0x1018, 0x14000); |
| 231 | memory_.SetData32(0x1020, 0x15000); |
| 232 | |
| 233 | entries.clear(); |
| 234 | for (auto addr : interface) { |
| 235 | entries.push_back(addr); |
| 236 | } |
| 237 | ASSERT_EQ(5U, entries.size()); |
| 238 | ASSERT_EQ(0x6000U, entries[0]); |
| 239 | ASSERT_EQ(0x7008U, entries[1]); |
| 240 | ASSERT_EQ(0x8010U, entries[2]); |
| 241 | ASSERT_EQ(0x9018U, entries[3]); |
| 242 | ASSERT_EQ(0xa020U, entries[4]); |
| 243 | } |
| 244 | |
| 245 | TEST_F(ElfInterfaceArmTest, FindEntry_load_bias) { |
| 246 | ElfInterfaceArm interface(&memory_); |
| 247 | interface.set_start_offset(0x1000); |
| 248 | interface.set_total_entries(2); |
| 249 | memory_.SetData32(0x1000, 0x6000); |
| 250 | memory_.SetData32(0x1008, 0x8000); |
| 251 | |
| 252 | uint64_t entry_offset; |
| 253 | interface.set_load_bias(0x2000); |
| 254 | ASSERT_FALSE(interface.FindEntry(0x1000, &entry_offset)); |
| 255 | ASSERT_FALSE(interface.FindEntry(0x8000, &entry_offset)); |
| 256 | ASSERT_FALSE(interface.FindEntry(0x8fff, &entry_offset)); |
| 257 | ASSERT_TRUE(interface.FindEntry(0x9000, &entry_offset)); |
| 258 | ASSERT_EQ(0x1000U, entry_offset); |
| 259 | ASSERT_TRUE(interface.FindEntry(0xb007, &entry_offset)); |
| 260 | ASSERT_EQ(0x1000U, entry_offset); |
| 261 | ASSERT_TRUE(interface.FindEntry(0xb008, &entry_offset)); |
| 262 | ASSERT_EQ(0x1008U, entry_offset); |
| 263 | } |
| 264 | |
| 265 | TEST_F(ElfInterfaceArmTest, HandleType_not_arm_exidx) { |
| 266 | ElfInterfaceArm interface(&memory_); |
| 267 | |
| 268 | ASSERT_FALSE(interface.HandleType(0x1000, PT_NULL)); |
| 269 | ASSERT_FALSE(interface.HandleType(0x1000, PT_LOAD)); |
| 270 | ASSERT_FALSE(interface.HandleType(0x1000, PT_DYNAMIC)); |
| 271 | ASSERT_FALSE(interface.HandleType(0x1000, PT_INTERP)); |
| 272 | ASSERT_FALSE(interface.HandleType(0x1000, PT_NOTE)); |
| 273 | ASSERT_FALSE(interface.HandleType(0x1000, PT_SHLIB)); |
| 274 | ASSERT_FALSE(interface.HandleType(0x1000, PT_PHDR)); |
| 275 | ASSERT_FALSE(interface.HandleType(0x1000, PT_TLS)); |
| 276 | ASSERT_FALSE(interface.HandleType(0x1000, PT_LOOS)); |
| 277 | ASSERT_FALSE(interface.HandleType(0x1000, PT_HIOS)); |
| 278 | ASSERT_FALSE(interface.HandleType(0x1000, PT_LOPROC)); |
| 279 | ASSERT_FALSE(interface.HandleType(0x1000, PT_HIPROC)); |
| 280 | ASSERT_FALSE(interface.HandleType(0x1000, PT_GNU_EH_FRAME)); |
| 281 | ASSERT_FALSE(interface.HandleType(0x1000, PT_GNU_STACK)); |
| 282 | } |
| 283 | |
| 284 | TEST_F(ElfInterfaceArmTest, HandleType_arm_exidx) { |
| 285 | ElfInterfaceArm interface(&memory_); |
| 286 | |
| 287 | Elf32_Phdr phdr; |
| 288 | interface.set_start_offset(0x1000); |
| 289 | interface.set_total_entries(100); |
| 290 | phdr.p_vaddr = 0x2000; |
| 291 | phdr.p_memsz = 0xa00; |
| 292 | |
| 293 | // Verify that if reads fail, we don't set the values but still get true. |
| 294 | ASSERT_TRUE(interface.HandleType(0x1000, 0x70000001)); |
| 295 | ASSERT_EQ(0x1000U, interface.start_offset()); |
| 296 | ASSERT_EQ(100U, interface.total_entries()); |
| 297 | |
| 298 | // Verify that if the second read fails, we still don't set the values. |
| 299 | memory_.SetData32( |
| 300 | 0x1000 + reinterpret_cast<uint64_t>(&phdr.p_vaddr) - reinterpret_cast<uint64_t>(&phdr), |
| 301 | phdr.p_vaddr); |
| 302 | ASSERT_TRUE(interface.HandleType(0x1000, 0x70000001)); |
| 303 | ASSERT_EQ(0x1000U, interface.start_offset()); |
| 304 | ASSERT_EQ(100U, interface.total_entries()); |
| 305 | |
| 306 | // Everything is correct and present. |
| 307 | memory_.SetData32( |
| 308 | 0x1000 + reinterpret_cast<uint64_t>(&phdr.p_memsz) - reinterpret_cast<uint64_t>(&phdr), |
| 309 | phdr.p_memsz); |
| 310 | ASSERT_TRUE(interface.HandleType(0x1000, 0x70000001)); |
| 311 | ASSERT_EQ(0x2000U, interface.start_offset()); |
| 312 | ASSERT_EQ(320U, interface.total_entries()); |
| 313 | |
| 314 | // Non-zero load bias. |
| 315 | interface.set_load_bias(0x1000); |
| 316 | ASSERT_TRUE(interface.HandleType(0x1000, 0x70000001)); |
| 317 | ASSERT_EQ(0x1000U, interface.start_offset()); |
| 318 | ASSERT_EQ(320U, interface.total_entries()); |
| 319 | } |
| 320 | |
| 321 | TEST_F(ElfInterfaceArmTest, StepExidx) { |
| 322 | ElfInterfaceArm interface(&memory_); |
| 323 | |
| 324 | // FindEntry fails. |
| 325 | ASSERT_FALSE(interface.StepExidx(0x7000, nullptr, nullptr)); |
| 326 | |
| 327 | // ExtractEntry should fail. |
| 328 | interface.set_start_offset(0x1000); |
| 329 | interface.set_total_entries(2); |
| 330 | memory_.SetData32(0x1000, 0x6000); |
| 331 | memory_.SetData32(0x1008, 0x8000); |
| 332 | |
| 333 | RegsArm regs; |
| 334 | regs[ARM_REG_SP] = 0x1000; |
| 335 | regs[ARM_REG_LR] = 0x20000; |
| 336 | regs.set_sp(regs[ARM_REG_SP]); |
| 337 | regs.set_pc(0x1234); |
| 338 | ASSERT_FALSE(interface.StepExidx(0x7000, ®s, &process_memory_)); |
| 339 | |
| 340 | // Eval should fail. |
| 341 | memory_.SetData32(0x1004, 0x81000000); |
| 342 | ASSERT_FALSE(interface.StepExidx(0x7000, ®s, &process_memory_)); |
| 343 | |
| 344 | // Everything should pass. |
| 345 | memory_.SetData32(0x1004, 0x80b0b0b0); |
| 346 | ASSERT_TRUE(interface.StepExidx(0x7000, ®s, &process_memory_)); |
| 347 | ASSERT_EQ(0x1000U, regs.sp()); |
| 348 | ASSERT_EQ(0x1000U, regs[ARM_REG_SP]); |
| 349 | ASSERT_EQ(0x20000U, regs.pc()); |
| 350 | ASSERT_EQ(0x20000U, regs[ARM_REG_PC]); |
| 351 | } |
| 352 | |
| 353 | TEST_F(ElfInterfaceArmTest, StepExidx_pc_set) { |
| 354 | ElfInterfaceArm interface(&memory_); |
| 355 | |
| 356 | interface.set_start_offset(0x1000); |
| 357 | interface.set_total_entries(2); |
| 358 | memory_.SetData32(0x1000, 0x6000); |
| 359 | memory_.SetData32(0x1004, 0x808800b0); |
| 360 | memory_.SetData32(0x1008, 0x8000); |
| 361 | process_memory_.SetData32(0x10000, 0x10); |
| 362 | |
| 363 | RegsArm regs; |
| 364 | regs[ARM_REG_SP] = 0x10000; |
| 365 | regs[ARM_REG_LR] = 0x20000; |
| 366 | regs.set_sp(regs[ARM_REG_SP]); |
| 367 | regs.set_pc(0x1234); |
| 368 | |
| 369 | // Everything should pass. |
| 370 | ASSERT_TRUE(interface.StepExidx(0x7000, ®s, &process_memory_)); |
| 371 | ASSERT_EQ(0x10004U, regs.sp()); |
| 372 | ASSERT_EQ(0x10004U, regs[ARM_REG_SP]); |
| 373 | ASSERT_EQ(0x10U, regs.pc()); |
| 374 | ASSERT_EQ(0x10U, regs[ARM_REG_PC]); |
| 375 | } |
Christopher Ferris | d226a51 | 2017-07-14 10:37:19 -0700 | [diff] [blame^] | 376 | |
| 377 | } // namespace unwindstack |