hansl@google.com | 8cf0a52 | 2010-05-12 17:51:21 +0000 | [diff] [blame] | 1 | // Copyright 2009, Google Inc. |
| 2 | // All rights reserved. |
| 3 | // |
| 4 | // Redistribution and use in source and binary forms, with or without |
| 5 | // modification, are permitted provided that the following conditions are |
| 6 | // met: |
| 7 | // |
| 8 | // * Redistributions of source code must retain the above copyright |
| 9 | // notice, this list of conditions and the following disclaimer. |
| 10 | // * Redistributions in binary form must reproduce the above |
| 11 | // copyright notice, this list of conditions and the following disclaimer |
| 12 | // in the documentation and/or other materials provided with the |
| 13 | // distribution. |
| 14 | // * Neither the name of Google Inc. nor the names of its |
| 15 | // contributors may be used to endorse or promote products derived from |
| 16 | // this software without specific prior written permission. |
| 17 | // |
| 18 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 19 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 20 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 21 | // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 22 | // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 23 | // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 24 | // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 25 | // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 26 | // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 27 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 28 | // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 29 | |
| 30 | #include <windows.h> |
| 31 | #include <dbghelp.h> |
| 32 | #include <strsafe.h> |
| 33 | #include <objbase.h> |
| 34 | #include <shellapi.h> |
| 35 | |
ted.mielczarek | 0df0555 | 2011-01-25 19:19:19 +0000 | [diff] [blame] | 36 | #include <string> |
| 37 | |
hansl@google.com | 8cf0a52 | 2010-05-12 17:51:21 +0000 | [diff] [blame] | 38 | #include "../../../breakpad_googletest_includes.h" |
ted.mielczarek | 0df0555 | 2011-01-25 19:19:19 +0000 | [diff] [blame] | 39 | #include "../../../../common/windows/string_utils-inl.h" |
hansl@google.com | 8cf0a52 | 2010-05-12 17:51:21 +0000 | [diff] [blame] | 40 | #include "../crash_generation/crash_generation_server.h" |
| 41 | #include "../handler/exception_handler.h" |
ted.mielczarek | 0df0555 | 2011-01-25 19:19:19 +0000 | [diff] [blame] | 42 | #include "../../../../google_breakpad/processor/minidump.h" |
hansl@google.com | 8cf0a52 | 2010-05-12 17:51:21 +0000 | [diff] [blame] | 43 | |
| 44 | namespace { |
ted.mielczarek | 0df0555 | 2011-01-25 19:19:19 +0000 | [diff] [blame] | 45 | |
| 46 | using std::wstring; |
| 47 | using namespace google_breakpad; |
| 48 | |
hansl@google.com | 8cf0a52 | 2010-05-12 17:51:21 +0000 | [diff] [blame] | 49 | const wchar_t kPipeName[] = L"\\\\.\\pipe\\BreakpadCrashTest\\TestCaseServer"; |
| 50 | const char kSuccessIndicator[] = "success"; |
| 51 | const char kFailureIndicator[] = "failure"; |
| 52 | |
| 53 | // Utility function to test for a path's existence. |
| 54 | BOOL DoesPathExist(const TCHAR *path_name); |
| 55 | |
| 56 | class ExceptionHandlerDeathTest : public ::testing::Test { |
| 57 | protected: |
| 58 | // Member variable for each test that they can use |
| 59 | // for temporary storage. |
| 60 | TCHAR temp_path_[MAX_PATH]; |
| 61 | // Actually constructs a temp path name. |
| 62 | virtual void SetUp(); |
| 63 | // A helper method that tests can use to crash. |
hansl@google.com | bcf885c | 2010-05-13 21:00:43 +0000 | [diff] [blame] | 64 | void DoCrashAccessViolation(); |
| 65 | void DoCrashPureVirtualCall(); |
hansl@google.com | 8cf0a52 | 2010-05-12 17:51:21 +0000 | [diff] [blame] | 66 | }; |
| 67 | |
| 68 | void ExceptionHandlerDeathTest::SetUp() { |
| 69 | const ::testing::TestInfo* const test_info = |
| 70 | ::testing::UnitTest::GetInstance()->current_test_info(); |
| 71 | TCHAR temp_path[MAX_PATH] = { '\0' }; |
| 72 | TCHAR test_name_wide[MAX_PATH] = { '\0' }; |
| 73 | // We want the temporary directory to be what the OS returns |
| 74 | // to us, + the test case name. |
| 75 | GetTempPath(MAX_PATH, temp_path); |
ted.mielczarek | 0df0555 | 2011-01-25 19:19:19 +0000 | [diff] [blame] | 76 | // The test case name is exposed as a c-style string, |
| 77 | // convert it to a wchar_t string. |
hansl@google.com | 8cf0a52 | 2010-05-12 17:51:21 +0000 | [diff] [blame] | 78 | int dwRet = MultiByteToWideChar(CP_ACP, 0, test_info->name(), |
| 79 | strlen(test_info->name()), |
| 80 | test_name_wide, |
| 81 | MAX_PATH); |
| 82 | if (!dwRet) { |
| 83 | assert(false); |
| 84 | } |
| 85 | StringCchPrintfW(temp_path_, MAX_PATH, L"%s%s", temp_path, test_name_wide); |
| 86 | CreateDirectory(temp_path_, NULL); |
| 87 | } |
| 88 | |
| 89 | BOOL DoesPathExist(const TCHAR *path_name) { |
| 90 | DWORD flags = GetFileAttributes(path_name); |
| 91 | if (flags == INVALID_FILE_ATTRIBUTES) { |
| 92 | return FALSE; |
| 93 | } |
| 94 | return TRUE; |
| 95 | } |
| 96 | |
| 97 | bool MinidumpWrittenCallback(const wchar_t* dump_path, |
| 98 | const wchar_t* minidump_id, |
| 99 | void* context, |
| 100 | EXCEPTION_POINTERS* exinfo, |
| 101 | MDRawAssertionInfo* assertion, |
| 102 | bool succeeded) { |
| 103 | if (succeeded && DoesPathExist(dump_path)) { |
| 104 | fprintf(stderr, kSuccessIndicator); |
| 105 | } else { |
| 106 | fprintf(stderr, kFailureIndicator); |
| 107 | } |
| 108 | // If we don't flush, the output doesn't get sent before |
| 109 | // this process dies. |
| 110 | fflush(stderr); |
| 111 | return succeeded; |
| 112 | } |
| 113 | |
| 114 | TEST_F(ExceptionHandlerDeathTest, InProcTest) { |
| 115 | // For the in-proc test, we just need to instantiate an exception |
| 116 | // handler in in-proc mode, and crash. Since the entire test is |
| 117 | // reexecuted in the child process, we don't have to worry about |
| 118 | // the semantics of the exception handler being inherited/not |
| 119 | // inherited across CreateProcess(). |
| 120 | ASSERT_TRUE(DoesPathExist(temp_path_)); |
| 121 | google_breakpad::ExceptionHandler *exc = |
| 122 | new google_breakpad::ExceptionHandler( |
| 123 | temp_path_, NULL, &MinidumpWrittenCallback, NULL, |
| 124 | google_breakpad::ExceptionHandler::HANDLER_ALL); |
| 125 | int *i = NULL; |
| 126 | ASSERT_DEATH((*i)++, kSuccessIndicator); |
| 127 | delete exc; |
| 128 | } |
| 129 | |
| 130 | static bool gDumpCallbackCalled = false; |
| 131 | |
| 132 | void clientDumpCallback(void *dump_context, |
| 133 | const google_breakpad::ClientInfo *client_info, |
| 134 | const std::wstring *dump_path) { |
| 135 | gDumpCallbackCalled = true; |
| 136 | } |
| 137 | |
hansl@google.com | bcf885c | 2010-05-13 21:00:43 +0000 | [diff] [blame] | 138 | void ExceptionHandlerDeathTest::DoCrashAccessViolation() { |
hansl@google.com | 8cf0a52 | 2010-05-12 17:51:21 +0000 | [diff] [blame] | 139 | google_breakpad::ExceptionHandler *exc = |
| 140 | new google_breakpad::ExceptionHandler( |
| 141 | temp_path_, NULL, NULL, NULL, |
| 142 | google_breakpad::ExceptionHandler::HANDLER_ALL, MiniDumpNormal, kPipeName, |
| 143 | NULL); |
| 144 | // Although this is executing in the child process of the death test, |
| 145 | // if it's not true we'll still get an error rather than the crash |
| 146 | // being expected. |
| 147 | ASSERT_TRUE(exc->IsOutOfProcess()); |
| 148 | int *i = NULL; |
| 149 | printf("%d\n", (*i)++); |
| 150 | } |
| 151 | |
| 152 | TEST_F(ExceptionHandlerDeathTest, OutOfProcTest) { |
| 153 | // We can take advantage of a detail of google test here to save some |
| 154 | // complexity in testing: when you do a death test, it actually forks. |
| 155 | // So we can make the main test harness the crash generation server, |
| 156 | // and call ASSERT_DEATH on a NULL dereference, it to expecting test |
| 157 | // the out of process scenario, since it's happening in a different |
| 158 | // process! This is different from the above because, above, we pass |
| 159 | // a NULL pipe name, and we also don't start a crash generation server. |
| 160 | |
| 161 | ASSERT_TRUE(DoesPathExist(temp_path_)); |
| 162 | std::wstring dump_path(temp_path_); |
| 163 | google_breakpad::CrashGenerationServer server( |
| 164 | kPipeName, NULL, NULL, NULL, &clientDumpCallback, NULL, NULL, NULL, true, |
| 165 | &dump_path); |
| 166 | |
| 167 | // This HAS to be EXPECT_, because when this test case is executed in the |
| 168 | // child process, the server registration will fail due to the named pipe |
| 169 | // being the same. |
| 170 | EXPECT_TRUE(server.Start()); |
| 171 | EXPECT_FALSE(gDumpCallbackCalled); |
hansl@google.com | bcf885c | 2010-05-13 21:00:43 +0000 | [diff] [blame] | 172 | ASSERT_DEATH(this->DoCrashAccessViolation(), ""); |
hansl@google.com | 8cf0a52 | 2010-05-12 17:51:21 +0000 | [diff] [blame] | 173 | EXPECT_TRUE(gDumpCallbackCalled); |
| 174 | } |
| 175 | |
| 176 | TEST_F(ExceptionHandlerDeathTest, InvalidParameterTest) { |
| 177 | using google_breakpad::ExceptionHandler; |
| 178 | |
| 179 | ASSERT_TRUE(DoesPathExist(temp_path_)); |
| 180 | ExceptionHandler handler(temp_path_, NULL, NULL, NULL, |
| 181 | ExceptionHandler::HANDLER_INVALID_PARAMETER); |
| 182 | |
| 183 | // Disable the message box for assertions |
| 184 | _CrtSetReportMode(_CRT_ASSERT, 0); |
| 185 | |
| 186 | // Call with a bad argument. The invalid parameter will be swallowed |
| 187 | // and a dump will be generated, the process will exit(0). |
| 188 | ASSERT_EXIT(printf(NULL), ::testing::ExitedWithCode(0), ""); |
| 189 | } |
hansl@google.com | bcf885c | 2010-05-13 21:00:43 +0000 | [diff] [blame] | 190 | |
| 191 | |
| 192 | struct PureVirtualCallBase { |
| 193 | PureVirtualCallBase() { |
| 194 | // We have to reinterpret so the linker doesn't get confused because the |
| 195 | // method isn't defined. |
| 196 | reinterpret_cast<PureVirtualCallBase*>(this)->PureFunction(); |
| 197 | } |
| 198 | virtual ~PureVirtualCallBase() {} |
| 199 | virtual void PureFunction() const = 0; |
| 200 | }; |
| 201 | struct PureVirtualCall : public PureVirtualCallBase { |
| 202 | PureVirtualCall() { PureFunction(); } |
| 203 | virtual void PureFunction() const {} |
| 204 | }; |
| 205 | |
| 206 | void ExceptionHandlerDeathTest::DoCrashPureVirtualCall() { |
| 207 | PureVirtualCall instance; |
| 208 | } |
| 209 | |
| 210 | TEST_F(ExceptionHandlerDeathTest, PureVirtualCallTest) { |
| 211 | using google_breakpad::ExceptionHandler; |
| 212 | |
| 213 | ASSERT_TRUE(DoesPathExist(temp_path_)); |
| 214 | ExceptionHandler handler(temp_path_, NULL, NULL, NULL, |
| 215 | ExceptionHandler::HANDLER_PURECALL); |
| 216 | |
| 217 | // Disable the message box for assertions |
| 218 | _CrtSetReportMode(_CRT_ASSERT, 0); |
| 219 | |
| 220 | // Calls a pure virtual function. |
| 221 | EXPECT_EXIT(DoCrashPureVirtualCall(), ::testing::ExitedWithCode(0), ""); |
| 222 | } |
ted.mielczarek | 0df0555 | 2011-01-25 19:19:19 +0000 | [diff] [blame] | 223 | |
| 224 | wstring find_minidump_in_directory(const wstring &directory) { |
| 225 | wstring search_path = directory + L"\\*"; |
| 226 | WIN32_FIND_DATA find_data; |
| 227 | HANDLE find_handle = FindFirstFileW(search_path.c_str(), &find_data); |
| 228 | if (find_handle == INVALID_HANDLE_VALUE) |
| 229 | return wstring(); |
| 230 | |
| 231 | wstring filename; |
| 232 | do { |
| 233 | const wchar_t extension[] = L".dmp"; |
| 234 | const int extension_length = sizeof(extension) / sizeof(extension[0]) - 1; |
| 235 | const int filename_length = wcslen(find_data.cFileName); |
| 236 | if (filename_length > extension_length && |
| 237 | wcsncmp(extension, |
| 238 | find_data.cFileName + filename_length - extension_length, |
| 239 | extension_length) == 0) { |
| 240 | filename = directory + L"\\" + find_data.cFileName; |
| 241 | break; |
| 242 | } |
| 243 | } while(FindNextFile(find_handle, &find_data)); |
| 244 | FindClose(find_handle); |
| 245 | return filename; |
hansl@google.com | 8cf0a52 | 2010-05-12 17:51:21 +0000 | [diff] [blame] | 246 | } |
ted.mielczarek | 0df0555 | 2011-01-25 19:19:19 +0000 | [diff] [blame] | 247 | |
| 248 | TEST_F(ExceptionHandlerDeathTest, InstructionPointerMemory) { |
| 249 | ASSERT_TRUE(DoesPathExist(temp_path_)); |
| 250 | google_breakpad::ExceptionHandler *exc = |
| 251 | new google_breakpad::ExceptionHandler( |
| 252 | temp_path_, NULL, NULL, NULL, |
| 253 | google_breakpad::ExceptionHandler::HANDLER_ALL); |
| 254 | |
| 255 | // Get some executable memory. |
| 256 | const u_int32_t kMemorySize = 256; // bytes |
| 257 | const int kOffset = kMemorySize / 2; |
| 258 | // This crashes with SIGILL on x86/x86-64/arm. |
| 259 | const unsigned char instructions[] = { 0xff, 0xff, 0xff, 0xff }; |
| 260 | char* memory = reinterpret_cast<char*>(VirtualAlloc(NULL, |
| 261 | kMemorySize, |
| 262 | MEM_COMMIT | MEM_RESERVE, |
| 263 | PAGE_EXECUTE_READWRITE)); |
| 264 | ASSERT_TRUE(memory); |
| 265 | |
| 266 | // Write some instructions that will crash. Put them |
| 267 | // in the middle of the block of memory, because the |
| 268 | // minidump should contain 128 bytes on either side of the |
| 269 | // instruction pointer. |
| 270 | memcpy(memory + kOffset, instructions, sizeof(instructions)); |
| 271 | |
| 272 | // Now execute the instructions, which should crash. |
| 273 | typedef void (*void_function)(void); |
| 274 | void_function memory_function = |
| 275 | reinterpret_cast<void_function>(memory + kOffset); |
| 276 | ASSERT_DEATH(memory_function(), ""); |
| 277 | |
| 278 | // free the memory. |
| 279 | VirtualFree(memory, 0, MEM_RELEASE); |
| 280 | |
| 281 | // Verify that the resulting minidump contains the memory around the IP |
| 282 | wstring minidump_filename_wide = find_minidump_in_directory(temp_path_); |
| 283 | ASSERT_FALSE(minidump_filename_wide.empty()); |
| 284 | string minidump_filename; |
| 285 | ASSERT_TRUE(WindowsStringUtils::safe_wcstombs(minidump_filename_wide, |
| 286 | &minidump_filename)); |
| 287 | |
| 288 | // Read the minidump. Locate the exception record and the |
| 289 | // memory list, and then ensure that there is a memory region |
| 290 | // in the memory list that covers the instruction pointer from |
| 291 | // the exception record. |
| 292 | { |
| 293 | Minidump minidump(minidump_filename); |
| 294 | ASSERT_TRUE(minidump.Read()); |
| 295 | |
| 296 | MinidumpException* exception = minidump.GetException(); |
| 297 | MinidumpMemoryList* memory_list = minidump.GetMemoryList(); |
| 298 | ASSERT_TRUE(exception); |
| 299 | ASSERT_TRUE(memory_list); |
| 300 | ASSERT_LT((unsigned)0, memory_list->region_count()); |
| 301 | |
| 302 | MinidumpContext* context = exception->GetContext(); |
| 303 | ASSERT_TRUE(context); |
| 304 | |
| 305 | u_int64_t instruction_pointer; |
| 306 | switch (context->GetContextCPU()) { |
| 307 | case MD_CONTEXT_X86: |
| 308 | instruction_pointer = context->GetContextX86()->eip; |
| 309 | break; |
| 310 | case MD_CONTEXT_AMD64: |
| 311 | instruction_pointer = context->GetContextAMD64()->rip; |
| 312 | break; |
| 313 | default: |
| 314 | FAIL() << "Unknown context CPU: " << context->GetContextCPU(); |
| 315 | break; |
| 316 | } |
| 317 | |
| 318 | MinidumpMemoryRegion* region = |
| 319 | memory_list->GetMemoryRegionForAddress(instruction_pointer); |
| 320 | ASSERT_TRUE(region); |
| 321 | |
| 322 | EXPECT_EQ(kMemorySize, region->GetSize()); |
| 323 | const u_int8_t* bytes = region->GetMemory(); |
| 324 | ASSERT_TRUE(bytes); |
| 325 | |
| 326 | u_int8_t prefix_bytes[kOffset]; |
| 327 | u_int8_t suffix_bytes[kMemorySize - kOffset - sizeof(instructions)]; |
| 328 | memset(prefix_bytes, 0, sizeof(prefix_bytes)); |
| 329 | memset(suffix_bytes, 0, sizeof(suffix_bytes)); |
| 330 | EXPECT_TRUE(memcmp(bytes, prefix_bytes, sizeof(prefix_bytes)) == 0); |
| 331 | EXPECT_TRUE(memcmp(bytes + kOffset, instructions, |
| 332 | sizeof(instructions)) == 0); |
| 333 | EXPECT_TRUE(memcmp(bytes + kOffset + sizeof(instructions), |
| 334 | suffix_bytes, sizeof(suffix_bytes)) == 0); |
| 335 | } |
| 336 | |
| 337 | DeleteFileW(minidump_filename_wide.c_str()); |
| 338 | } |
| 339 | |
| 340 | TEST_F(ExceptionHandlerDeathTest, InstructionPointerMemoryMinBound) { |
| 341 | ASSERT_TRUE(DoesPathExist(temp_path_)); |
| 342 | google_breakpad::ExceptionHandler *exc = |
| 343 | new google_breakpad::ExceptionHandler( |
| 344 | temp_path_, NULL, NULL, NULL, |
| 345 | google_breakpad::ExceptionHandler::HANDLER_ALL); |
| 346 | |
| 347 | SYSTEM_INFO sSysInfo; // Useful information about the system |
| 348 | GetSystemInfo(&sSysInfo); // Initialize the structure. |
| 349 | |
| 350 | const u_int32_t kMemorySize = 256; // bytes |
| 351 | const DWORD kPageSize = sSysInfo.dwPageSize; |
| 352 | const int kOffset = 0; |
| 353 | // This crashes with SIGILL on x86/x86-64/arm. |
| 354 | const unsigned char instructions[] = { 0xff, 0xff, 0xff, 0xff }; |
| 355 | // Get some executable memory. Specifically, reserve two pages, |
| 356 | // but only commit the second. |
| 357 | char* all_memory = reinterpret_cast<char*>(VirtualAlloc(NULL, |
| 358 | kPageSize * 2, |
| 359 | MEM_RESERVE, |
| 360 | PAGE_NOACCESS)); |
| 361 | ASSERT_TRUE(all_memory); |
| 362 | char* memory = all_memory + kPageSize; |
| 363 | ASSERT_TRUE(VirtualAlloc(memory, kPageSize, |
| 364 | MEM_COMMIT, PAGE_EXECUTE_READWRITE)); |
| 365 | |
| 366 | // Write some instructions that will crash. Put them |
| 367 | // in the middle of the block of memory, because the |
| 368 | // minidump should contain 128 bytes on either side of the |
| 369 | // instruction pointer. |
| 370 | memcpy(memory + kOffset, instructions, sizeof(instructions)); |
| 371 | |
| 372 | // Now execute the instructions, which should crash. |
| 373 | typedef void (*void_function)(void); |
| 374 | void_function memory_function = |
| 375 | reinterpret_cast<void_function>(memory + kOffset); |
| 376 | ASSERT_DEATH(memory_function(), ""); |
| 377 | |
| 378 | // free the memory. |
| 379 | VirtualFree(memory, 0, MEM_RELEASE); |
| 380 | |
| 381 | // Verify that the resulting minidump contains the memory around the IP |
| 382 | wstring minidump_filename_wide = find_minidump_in_directory(temp_path_); |
| 383 | ASSERT_FALSE(minidump_filename_wide.empty()); |
| 384 | string minidump_filename; |
| 385 | ASSERT_TRUE(WindowsStringUtils::safe_wcstombs(minidump_filename_wide, |
| 386 | &minidump_filename)); |
| 387 | |
| 388 | // Read the minidump. Locate the exception record and the |
| 389 | // memory list, and then ensure that there is a memory region |
| 390 | // in the memory list that covers the instruction pointer from |
| 391 | // the exception record. |
| 392 | { |
| 393 | Minidump minidump(minidump_filename); |
| 394 | ASSERT_TRUE(minidump.Read()); |
| 395 | |
| 396 | MinidumpException* exception = minidump.GetException(); |
| 397 | MinidumpMemoryList* memory_list = minidump.GetMemoryList(); |
| 398 | ASSERT_TRUE(exception); |
| 399 | ASSERT_TRUE(memory_list); |
| 400 | ASSERT_LT((unsigned)0, memory_list->region_count()); |
| 401 | |
| 402 | MinidumpContext* context = exception->GetContext(); |
| 403 | ASSERT_TRUE(context); |
| 404 | |
| 405 | u_int64_t instruction_pointer; |
| 406 | switch (context->GetContextCPU()) { |
| 407 | case MD_CONTEXT_X86: |
| 408 | instruction_pointer = context->GetContextX86()->eip; |
| 409 | break; |
| 410 | case MD_CONTEXT_AMD64: |
| 411 | instruction_pointer = context->GetContextAMD64()->rip; |
| 412 | break; |
| 413 | default: |
| 414 | FAIL() << "Unknown context CPU: " << context->GetContextCPU(); |
| 415 | break; |
| 416 | } |
| 417 | |
| 418 | MinidumpMemoryRegion* region = |
| 419 | memory_list->GetMemoryRegionForAddress(instruction_pointer); |
| 420 | ASSERT_TRUE(region); |
| 421 | |
| 422 | EXPECT_EQ(kMemorySize / 2, region->GetSize()); |
| 423 | const u_int8_t* bytes = region->GetMemory(); |
| 424 | ASSERT_TRUE(bytes); |
| 425 | |
| 426 | u_int8_t suffix_bytes[kMemorySize / 2 - sizeof(instructions)]; |
| 427 | memset(suffix_bytes, 0, sizeof(suffix_bytes)); |
| 428 | EXPECT_TRUE(memcmp(bytes + kOffset, |
| 429 | instructions, sizeof(instructions)) == 0); |
| 430 | EXPECT_TRUE(memcmp(bytes + kOffset + sizeof(instructions), |
| 431 | suffix_bytes, sizeof(suffix_bytes)) == 0); |
| 432 | } |
| 433 | |
| 434 | DeleteFileW(minidump_filename_wide.c_str()); |
| 435 | } |
| 436 | |
| 437 | TEST_F(ExceptionHandlerDeathTest, InstructionPointerMemoryMaxBound) { |
| 438 | ASSERT_TRUE(DoesPathExist(temp_path_)); |
| 439 | google_breakpad::ExceptionHandler *exc = |
| 440 | new google_breakpad::ExceptionHandler( |
| 441 | temp_path_, NULL, NULL, NULL, |
| 442 | google_breakpad::ExceptionHandler::HANDLER_ALL); |
| 443 | |
| 444 | SYSTEM_INFO sSysInfo; // Useful information about the system |
| 445 | GetSystemInfo(&sSysInfo); // Initialize the structure. |
| 446 | |
| 447 | const DWORD kPageSize = sSysInfo.dwPageSize; |
| 448 | // This crashes with SIGILL on x86/x86-64/arm. |
| 449 | const unsigned char instructions[] = { 0xff, 0xff, 0xff, 0xff }; |
| 450 | const int kOffset = kPageSize - sizeof(instructions); |
| 451 | // Get some executable memory. Specifically, reserve two pages, |
| 452 | // but only commit the first. |
| 453 | char* memory = reinterpret_cast<char*>(VirtualAlloc(NULL, |
| 454 | kPageSize * 2, |
| 455 | MEM_RESERVE, |
| 456 | PAGE_NOACCESS)); |
| 457 | ASSERT_TRUE(memory); |
| 458 | ASSERT_TRUE(VirtualAlloc(memory, kPageSize, |
| 459 | MEM_COMMIT, PAGE_EXECUTE_READWRITE)); |
| 460 | |
| 461 | // Write some instructions that will crash. |
| 462 | memcpy(memory + kOffset, instructions, sizeof(instructions)); |
| 463 | |
| 464 | // Now execute the instructions, which should crash. |
| 465 | typedef void (*void_function)(void); |
| 466 | void_function memory_function = |
| 467 | reinterpret_cast<void_function>(memory + kOffset); |
| 468 | ASSERT_DEATH(memory_function(), ""); |
| 469 | |
| 470 | // free the memory. |
| 471 | VirtualFree(memory, 0, MEM_RELEASE); |
| 472 | |
| 473 | // Verify that the resulting minidump contains the memory around the IP |
| 474 | wstring minidump_filename_wide = find_minidump_in_directory(temp_path_); |
| 475 | ASSERT_FALSE(minidump_filename_wide.empty()); |
| 476 | string minidump_filename; |
| 477 | ASSERT_TRUE(WindowsStringUtils::safe_wcstombs(minidump_filename_wide, |
| 478 | &minidump_filename)); |
| 479 | |
| 480 | // Read the minidump. Locate the exception record and the |
| 481 | // memory list, and then ensure that there is a memory region |
| 482 | // in the memory list that covers the instruction pointer from |
| 483 | // the exception record. |
| 484 | { |
| 485 | Minidump minidump(minidump_filename); |
| 486 | ASSERT_TRUE(minidump.Read()); |
| 487 | |
| 488 | MinidumpException* exception = minidump.GetException(); |
| 489 | MinidumpMemoryList* memory_list = minidump.GetMemoryList(); |
| 490 | ASSERT_TRUE(exception); |
| 491 | ASSERT_TRUE(memory_list); |
| 492 | ASSERT_LT((unsigned)0, memory_list->region_count()); |
| 493 | |
| 494 | MinidumpContext* context = exception->GetContext(); |
| 495 | ASSERT_TRUE(context); |
| 496 | |
| 497 | u_int64_t instruction_pointer; |
| 498 | switch (context->GetContextCPU()) { |
| 499 | case MD_CONTEXT_X86: |
| 500 | instruction_pointer = context->GetContextX86()->eip; |
| 501 | break; |
| 502 | case MD_CONTEXT_AMD64: |
| 503 | instruction_pointer = context->GetContextAMD64()->rip; |
| 504 | break; |
| 505 | default: |
| 506 | FAIL() << "Unknown context CPU: " << context->GetContextCPU(); |
| 507 | break; |
| 508 | } |
| 509 | |
| 510 | MinidumpMemoryRegion* region = |
| 511 | memory_list->GetMemoryRegionForAddress(instruction_pointer); |
| 512 | ASSERT_TRUE(region); |
| 513 | |
| 514 | const size_t kPrefixSize = 128; // bytes |
| 515 | EXPECT_EQ(kPrefixSize + sizeof(instructions), region->GetSize()); |
| 516 | const u_int8_t* bytes = region->GetMemory(); |
| 517 | ASSERT_TRUE(bytes); |
| 518 | |
| 519 | u_int8_t prefix_bytes[kPrefixSize]; |
| 520 | memset(prefix_bytes, 0, sizeof(prefix_bytes)); |
| 521 | EXPECT_TRUE(memcmp(bytes, prefix_bytes, sizeof(prefix_bytes)) == 0); |
| 522 | EXPECT_TRUE(memcmp(bytes + kPrefixSize, |
| 523 | instructions, sizeof(instructions)) == 0); |
| 524 | } |
| 525 | |
| 526 | DeleteFileW(minidump_filename_wide.c_str()); |
| 527 | } |
| 528 | |
| 529 | } // namespace |