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Diffstat (limited to 'toolkit/crashreporter/breakpad-client/mac/tests/exception_handler_test.cc')
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1 files changed, 714 insertions, 0 deletions
diff --git a/toolkit/crashreporter/breakpad-client/mac/tests/exception_handler_test.cc b/toolkit/crashreporter/breakpad-client/mac/tests/exception_handler_test.cc new file mode 100644 index 0000000000..d5b505a1e1 --- /dev/null +++ b/toolkit/crashreporter/breakpad-client/mac/tests/exception_handler_test.cc @@ -0,0 +1,714 @@ +// Copyright (c) 2010, Google Inc. +// All rights reserved. +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + +// exception_handler_test.cc: Unit tests for google_breakpad::ExceptionHandler + +#include <pthread.h> +#include <sys/mman.h> +#include <sys/stat.h> +#include <unistd.h> + +#include "breakpad_googletest_includes.h" +#include "client/mac/handler/exception_handler.h" +#include "common/linux/ignore_ret.h" +#include "common/mac/MachIPC.h" +#include "common/tests/auto_tempdir.h" +#include "google_breakpad/processor/minidump.h" + +namespace google_breakpad { +// This acts as the log sink for INFO logging from the processor +// logging code. The logging output confuses XCode and makes it think +// there are unit test failures. testlogging.h handles the overriding. +std::ostringstream info_log; +} + +namespace { +using std::string; +using google_breakpad::AutoTempDir; +using google_breakpad::ExceptionHandler; +using google_breakpad::MachPortSender; +using google_breakpad::MachReceiveMessage; +using google_breakpad::MachSendMessage; +using google_breakpad::Minidump; +using google_breakpad::MinidumpContext; +using google_breakpad::MinidumpException; +using google_breakpad::MinidumpMemoryList; +using google_breakpad::MinidumpMemoryRegion; +using google_breakpad::ReceivePort; +using testing::Test; + +class ExceptionHandlerTest : public Test { + public: + void InProcessCrash(bool aborting); + AutoTempDir tempDir; + string lastDumpName; +}; + +static void Crasher() { + int *a = (int*)0x42; + + fprintf(stdout, "Going to crash...\n"); + fprintf(stdout, "A = %d", *a); +} + +static void AbortCrasher() { + fprintf(stdout, "Going to crash...\n"); + abort(); +} + +static void SoonToCrash(void(*crasher)()) { + crasher(); +} + +static bool MDCallback(const char *dump_dir, const char *file_name, + void *context, bool success) { + string path(dump_dir); + path.append("/"); + path.append(file_name); + path.append(".dmp"); + + int fd = *reinterpret_cast<int*>(context); + IGNORE_RET(write(fd, path.c_str(), path.length() + 1)); + close(fd); + exit(0); + // not reached + return true; +} + +void ExceptionHandlerTest::InProcessCrash(bool aborting) { + // Give the child process a pipe to report back on. + int fds[2]; + ASSERT_EQ(0, pipe(fds)); + // Fork off a child process so it can crash. + pid_t pid = fork(); + if (pid == 0) { + // In the child process. + close(fds[0]); + ExceptionHandler eh(tempDir.path(), NULL, MDCallback, &fds[1], true, NULL); + // crash + SoonToCrash(aborting ? &AbortCrasher : &Crasher); + // not reached + exit(1); + } + // In the parent process. + ASSERT_NE(-1, pid); + // Wait for the background process to return the minidump file. + close(fds[1]); + char minidump_file[PATH_MAX]; + ssize_t nbytes = read(fds[0], minidump_file, sizeof(minidump_file)); + ASSERT_NE(0, nbytes); + + Minidump minidump(minidump_file); + ASSERT_TRUE(minidump.Read()); + + MinidumpException* exception = minidump.GetException(); + ASSERT_TRUE(exception); + + const MDRawExceptionStream* raw_exception = exception->exception(); + ASSERT_TRUE(raw_exception); + + if (aborting) { + EXPECT_EQ(MD_EXCEPTION_MAC_SOFTWARE, + raw_exception->exception_record.exception_code); + EXPECT_EQ(MD_EXCEPTION_CODE_MAC_ABORT, + raw_exception->exception_record.exception_flags); + } else { + EXPECT_EQ(MD_EXCEPTION_MAC_BAD_ACCESS, + raw_exception->exception_record.exception_code); +#if defined(__x86_64__) + EXPECT_EQ(MD_EXCEPTION_CODE_MAC_INVALID_ADDRESS, + raw_exception->exception_record.exception_flags); +#elif defined(__i386__) + EXPECT_EQ(MD_EXCEPTION_CODE_MAC_PROTECTION_FAILURE, + raw_exception->exception_record.exception_flags); +#endif + } + + const MinidumpContext* context = exception->GetContext(); + ASSERT_TRUE(context); + + uint64_t instruction_pointer; + ASSERT_TRUE(context->GetInstructionPointer(&instruction_pointer)); + + // Ideally would like to sanity check that abort() is on the stack + // but that's hard. + MinidumpMemoryList* memory_list = minidump.GetMemoryList(); + ASSERT_TRUE(memory_list); + MinidumpMemoryRegion* region = + memory_list->GetMemoryRegionForAddress(instruction_pointer); + EXPECT_TRUE(region); + + // Child process should have exited with a zero status. + int ret; + ASSERT_EQ(pid, waitpid(pid, &ret, 0)); + EXPECT_NE(0, WIFEXITED(ret)); + EXPECT_EQ(0, WEXITSTATUS(ret)); +} + +TEST_F(ExceptionHandlerTest, InProcess) { + InProcessCrash(false); +} + +TEST_F(ExceptionHandlerTest, InProcessAbort) { + InProcessCrash(true); +} + +static bool DumpNameMDCallback(const char *dump_dir, const char *file_name, + void *context, bool success) { + ExceptionHandlerTest *self = reinterpret_cast<ExceptionHandlerTest*>(context); + if (dump_dir && file_name) { + self->lastDumpName = dump_dir; + self->lastDumpName += "/"; + self->lastDumpName += file_name; + self->lastDumpName += ".dmp"; + } + return true; +} + +TEST_F(ExceptionHandlerTest, WriteMinidump) { + ExceptionHandler eh(tempDir.path(), NULL, DumpNameMDCallback, this, true, + NULL); + ASSERT_TRUE(eh.WriteMinidump()); + + // Ensure that minidump file exists and is > 0 bytes. + ASSERT_FALSE(lastDumpName.empty()); + struct stat st; + ASSERT_EQ(0, stat(lastDumpName.c_str(), &st)); + ASSERT_LT(0, st.st_size); + + // The minidump should not contain an exception stream. + Minidump minidump(lastDumpName); + ASSERT_TRUE(minidump.Read()); + + MinidumpException* exception = minidump.GetException(); + EXPECT_FALSE(exception); +} + +TEST_F(ExceptionHandlerTest, WriteMinidumpWithException) { + ExceptionHandler eh(tempDir.path(), NULL, DumpNameMDCallback, this, true, + NULL); + ASSERT_TRUE(eh.WriteMinidump(true)); + + // Ensure that minidump file exists and is > 0 bytes. + ASSERT_FALSE(lastDumpName.empty()); + struct stat st; + ASSERT_EQ(0, stat(lastDumpName.c_str(), &st)); + ASSERT_LT(0, st.st_size); + + // The minidump should contain an exception stream. + Minidump minidump(lastDumpName); + ASSERT_TRUE(minidump.Read()); + + MinidumpException* exception = minidump.GetException(); + ASSERT_TRUE(exception); + const MDRawExceptionStream* raw_exception = exception->exception(); + ASSERT_TRUE(raw_exception); + + EXPECT_EQ(MD_EXCEPTION_MAC_BREAKPOINT, + raw_exception->exception_record.exception_code); +} + +TEST_F(ExceptionHandlerTest, DumpChildProcess) { + const int kTimeoutMs = 2000; + // Create a mach port to receive the child task on. + char machPortName[128]; + sprintf(machPortName, "ExceptionHandlerTest.%d", getpid()); + ReceivePort parent_recv_port(machPortName); + + // Give the child process a pipe to block on. + int fds[2]; + ASSERT_EQ(0, pipe(fds)); + + // Fork off a child process to dump. + pid_t pid = fork(); + if (pid == 0) { + // In the child process + close(fds[1]); + + // Send parent process the task and thread ports. + MachSendMessage child_message(0); + child_message.AddDescriptor(mach_task_self()); + child_message.AddDescriptor(mach_thread_self()); + + MachPortSender child_sender(machPortName); + if (child_sender.SendMessage(child_message, kTimeoutMs) != KERN_SUCCESS) + exit(1); + + // Wait for the parent process. + uint8_t data; + read(fds[0], &data, 1); + exit(0); + } + // In the parent process. + ASSERT_NE(-1, pid); + close(fds[0]); + + // Read the child's task and thread ports. + MachReceiveMessage child_message; + ASSERT_EQ(KERN_SUCCESS, + parent_recv_port.WaitForMessage(&child_message, kTimeoutMs)); + mach_port_t child_task = child_message.GetTranslatedPort(0); + mach_port_t child_thread = child_message.GetTranslatedPort(1); + ASSERT_NE((mach_port_t)MACH_PORT_NULL, child_task); + ASSERT_NE((mach_port_t)MACH_PORT_NULL, child_thread); + + // Write a minidump of the child process. + bool result = ExceptionHandler::WriteMinidumpForChild(child_task, + child_thread, + tempDir.path(), + DumpNameMDCallback, + this); + ASSERT_EQ(true, result); + + // Ensure that minidump file exists and is > 0 bytes. + ASSERT_FALSE(lastDumpName.empty()); + struct stat st; + ASSERT_EQ(0, stat(lastDumpName.c_str(), &st)); + ASSERT_LT(0, st.st_size); + + // Unblock child process + uint8_t data = 1; + IGNORE_RET(write(fds[1], &data, 1)); + + // Child process should have exited with a zero status. + int ret; + ASSERT_EQ(pid, waitpid(pid, &ret, 0)); + EXPECT_NE(0, WIFEXITED(ret)); + EXPECT_EQ(0, WEXITSTATUS(ret)); +} + +// Test that memory around the instruction pointer is written +// to the dump as a MinidumpMemoryRegion. +TEST_F(ExceptionHandlerTest, InstructionPointerMemory) { + // Give the child process a pipe to report back on. + int fds[2]; + ASSERT_EQ(0, pipe(fds)); + + // These are defined here so the parent can use them to check the + // data from the minidump afterwards. + const uint32_t kMemorySize = 256; // bytes + const int kOffset = kMemorySize / 2; + // This crashes with SIGILL on x86/x86-64/arm. + const unsigned char instructions[] = { 0xff, 0xff, 0xff, 0xff }; + + pid_t pid = fork(); + if (pid == 0) { + close(fds[0]); + ExceptionHandler eh(tempDir.path(), NULL, MDCallback, &fds[1], true, NULL); + // Get some executable memory. + char* memory = + reinterpret_cast<char*>(mmap(NULL, + kMemorySize, + PROT_READ | PROT_WRITE | PROT_EXEC, + MAP_PRIVATE | MAP_ANON, + -1, + 0)); + if (!memory) + exit(0); + + // Write some instructions that will crash. Put them in the middle + // of the block of memory, because the minidump should contain 128 + // bytes on either side of the instruction pointer. + memcpy(memory + kOffset, instructions, sizeof(instructions)); + + // Now execute the instructions, which should crash. + typedef void (*void_function)(void); + void_function memory_function = + reinterpret_cast<void_function>(memory + kOffset); + memory_function(); + // not reached + exit(1); + } + // In the parent process. + ASSERT_NE(-1, pid); + close(fds[1]); + + // Wait for the background process to return the minidump file. + close(fds[1]); + char minidump_file[PATH_MAX]; + ssize_t nbytes = read(fds[0], minidump_file, sizeof(minidump_file)); + ASSERT_NE(0, nbytes); + // Ensure that minidump file exists and is > 0 bytes. + struct stat st; + ASSERT_EQ(0, stat(minidump_file, &st)); + ASSERT_LT(0, st.st_size); + + // Child process should have exited with a zero status. + int ret; + ASSERT_EQ(pid, waitpid(pid, &ret, 0)); + EXPECT_NE(0, WIFEXITED(ret)); + EXPECT_EQ(0, WEXITSTATUS(ret)); + + // Read the minidump. Locate the exception record and the + // memory list, and then ensure that there is a memory region + // in the memory list that covers the instruction pointer from + // the exception record. + Minidump minidump(minidump_file); + ASSERT_TRUE(minidump.Read()); + + MinidumpException* exception = minidump.GetException(); + MinidumpMemoryList* memory_list = minidump.GetMemoryList(); + ASSERT_TRUE(exception); + ASSERT_TRUE(memory_list); + ASSERT_NE((unsigned int)0, memory_list->region_count()); + + MinidumpContext* context = exception->GetContext(); + ASSERT_TRUE(context); + + uint64_t instruction_pointer; + ASSERT_TRUE(context->GetInstructionPointer(&instruction_pointer)); + + MinidumpMemoryRegion* region = + memory_list->GetMemoryRegionForAddress(instruction_pointer); + EXPECT_TRUE(region); + + EXPECT_EQ(kMemorySize, region->GetSize()); + const uint8_t* bytes = region->GetMemory(); + ASSERT_TRUE(bytes); + + uint8_t prefix_bytes[kOffset]; + uint8_t suffix_bytes[kMemorySize - kOffset - sizeof(instructions)]; + memset(prefix_bytes, 0, sizeof(prefix_bytes)); + memset(suffix_bytes, 0, sizeof(suffix_bytes)); + EXPECT_TRUE(memcmp(bytes, prefix_bytes, sizeof(prefix_bytes)) == 0); + EXPECT_TRUE(memcmp(bytes + kOffset, instructions, sizeof(instructions)) == 0); + EXPECT_TRUE(memcmp(bytes + kOffset + sizeof(instructions), + suffix_bytes, sizeof(suffix_bytes)) == 0); +} + +// Test that the memory region around the instruction pointer is +// bounded correctly on the low end. +TEST_F(ExceptionHandlerTest, InstructionPointerMemoryMinBound) { + // Give the child process a pipe to report back on. + int fds[2]; + ASSERT_EQ(0, pipe(fds)); + + // These are defined here so the parent can use them to check the + // data from the minidump afterwards. + const uint32_t kMemorySize = 256; // bytes + const int kOffset = 0; + // This crashes with SIGILL on x86/x86-64/arm. + const unsigned char instructions[] = { 0xff, 0xff, 0xff, 0xff }; + + pid_t pid = fork(); + if (pid == 0) { + close(fds[0]); + ExceptionHandler eh(tempDir.path(), NULL, MDCallback, &fds[1], true, NULL); + // Get some executable memory. + char* memory = + reinterpret_cast<char*>(mmap(NULL, + kMemorySize, + PROT_READ | PROT_WRITE | PROT_EXEC, + MAP_PRIVATE | MAP_ANON, + -1, + 0)); + if (!memory) + exit(0); + + // Write some instructions that will crash. Put them at the start + // of the block of memory, to ensure that the memory bounding + // works properly. + memcpy(memory + kOffset, instructions, sizeof(instructions)); + + // Now execute the instructions, which should crash. + typedef void (*void_function)(void); + void_function memory_function = + reinterpret_cast<void_function>(memory + kOffset); + memory_function(); + // not reached + exit(1); + } + // In the parent process. + ASSERT_NE(-1, pid); + close(fds[1]); + + // Wait for the background process to return the minidump file. + close(fds[1]); + char minidump_file[PATH_MAX]; + ssize_t nbytes = read(fds[0], minidump_file, sizeof(minidump_file)); + ASSERT_NE(0, nbytes); + // Ensure that minidump file exists and is > 0 bytes. + struct stat st; + ASSERT_EQ(0, stat(minidump_file, &st)); + ASSERT_LT(0, st.st_size); + + // Child process should have exited with a zero status. + int ret; + ASSERT_EQ(pid, waitpid(pid, &ret, 0)); + EXPECT_NE(0, WIFEXITED(ret)); + EXPECT_EQ(0, WEXITSTATUS(ret)); + + // Read the minidump. Locate the exception record and the + // memory list, and then ensure that there is a memory region + // in the memory list that covers the instruction pointer from + // the exception record. + Minidump minidump(minidump_file); + ASSERT_TRUE(minidump.Read()); + + MinidumpException* exception = minidump.GetException(); + MinidumpMemoryList* memory_list = minidump.GetMemoryList(); + ASSERT_TRUE(exception); + ASSERT_TRUE(memory_list); + ASSERT_NE((unsigned int)0, memory_list->region_count()); + + MinidumpContext* context = exception->GetContext(); + ASSERT_TRUE(context); + + uint64_t instruction_pointer; + ASSERT_TRUE(context->GetInstructionPointer(&instruction_pointer)); + + MinidumpMemoryRegion* region = + memory_list->GetMemoryRegionForAddress(instruction_pointer); + EXPECT_TRUE(region); + + EXPECT_EQ(kMemorySize / 2, region->GetSize()); + const uint8_t* bytes = region->GetMemory(); + ASSERT_TRUE(bytes); + + uint8_t suffix_bytes[kMemorySize / 2 - sizeof(instructions)]; + memset(suffix_bytes, 0, sizeof(suffix_bytes)); + EXPECT_TRUE(memcmp(bytes + kOffset, instructions, sizeof(instructions)) == 0); + EXPECT_TRUE(memcmp(bytes + kOffset + sizeof(instructions), + suffix_bytes, sizeof(suffix_bytes)) == 0); +} + +// Test that the memory region around the instruction pointer is +// bounded correctly on the high end. +TEST_F(ExceptionHandlerTest, InstructionPointerMemoryMaxBound) { + // Give the child process a pipe to report back on. + int fds[2]; + ASSERT_EQ(0, pipe(fds)); + + // These are defined here so the parent can use them to check the + // data from the minidump afterwards. + // Use 4k here because the OS will hand out a single page even + // if a smaller size is requested, and this test wants to + // test the upper bound of the memory range. + const uint32_t kMemorySize = 4096; // bytes + // This crashes with SIGILL on x86/x86-64/arm. + const unsigned char instructions[] = { 0xff, 0xff, 0xff, 0xff }; + const int kOffset = kMemorySize - sizeof(instructions); + + pid_t pid = fork(); + if (pid == 0) { + close(fds[0]); + ExceptionHandler eh(tempDir.path(), NULL, MDCallback, &fds[1], true, NULL); + // Get some executable memory. + char* memory = + reinterpret_cast<char*>(mmap(NULL, + kMemorySize, + PROT_READ | PROT_WRITE | PROT_EXEC, + MAP_PRIVATE | MAP_ANON, + -1, + 0)); + if (!memory) + exit(0); + + // Write some instructions that will crash. Put them at the start + // of the block of memory, to ensure that the memory bounding + // works properly. + memcpy(memory + kOffset, instructions, sizeof(instructions)); + + // Now execute the instructions, which should crash. + typedef void (*void_function)(void); + void_function memory_function = + reinterpret_cast<void_function>(memory + kOffset); + memory_function(); + // not reached + exit(1); + } + // In the parent process. + ASSERT_NE(-1, pid); + close(fds[1]); + + // Wait for the background process to return the minidump file. + close(fds[1]); + char minidump_file[PATH_MAX]; + ssize_t nbytes = read(fds[0], minidump_file, sizeof(minidump_file)); + ASSERT_NE(0, nbytes); + // Ensure that minidump file exists and is > 0 bytes. + struct stat st; + ASSERT_EQ(0, stat(minidump_file, &st)); + ASSERT_LT(0, st.st_size); + + // Child process should have exited with a zero status. + int ret; + ASSERT_EQ(pid, waitpid(pid, &ret, 0)); + EXPECT_NE(0, WIFEXITED(ret)); + EXPECT_EQ(0, WEXITSTATUS(ret)); + + // Read the minidump. Locate the exception record and the + // memory list, and then ensure that there is a memory region + // in the memory list that covers the instruction pointer from + // the exception record. + Minidump minidump(minidump_file); + ASSERT_TRUE(minidump.Read()); + + MinidumpException* exception = minidump.GetException(); + MinidumpMemoryList* memory_list = minidump.GetMemoryList(); + ASSERT_TRUE(exception); + ASSERT_TRUE(memory_list); + ASSERT_NE((unsigned int)0, memory_list->region_count()); + + MinidumpContext* context = exception->GetContext(); + ASSERT_TRUE(context); + + uint64_t instruction_pointer; + ASSERT_TRUE(context->GetInstructionPointer(&instruction_pointer)); + + MinidumpMemoryRegion* region = + memory_list->GetMemoryRegionForAddress(instruction_pointer); + EXPECT_TRUE(region); + + const size_t kPrefixSize = 128; // bytes + EXPECT_EQ(kPrefixSize + sizeof(instructions), region->GetSize()); + const uint8_t* bytes = region->GetMemory(); + ASSERT_TRUE(bytes); + + uint8_t prefix_bytes[kPrefixSize]; + memset(prefix_bytes, 0, sizeof(prefix_bytes)); + EXPECT_TRUE(memcmp(bytes, prefix_bytes, sizeof(prefix_bytes)) == 0); + EXPECT_TRUE(memcmp(bytes + kPrefixSize, + instructions, sizeof(instructions)) == 0); +} + +// Ensure that an extra memory block doesn't get added when the +// instruction pointer is not in mapped memory. +TEST_F(ExceptionHandlerTest, InstructionPointerMemoryNullPointer) { + // Give the child process a pipe to report back on. + int fds[2]; + ASSERT_EQ(0, pipe(fds)); + + pid_t pid = fork(); + if (pid == 0) { + close(fds[0]); + ExceptionHandler eh(tempDir.path(), NULL, MDCallback, &fds[1], true, NULL); + // Try calling a NULL pointer. + typedef void (*void_function)(void); + // Volatile markings are needed to keep Clang from generating invalid + // opcodes. See http://crbug.com/498354 for details. + volatile void_function memory_function = + reinterpret_cast<void_function>(NULL); + memory_function(); + // not reached + exit(1); + } + // In the parent process. + ASSERT_NE(-1, pid); + close(fds[1]); + + // Wait for the background process to return the minidump file. + close(fds[1]); + char minidump_file[PATH_MAX]; + ssize_t nbytes = read(fds[0], minidump_file, sizeof(minidump_file)); + ASSERT_NE(0, nbytes); + // Ensure that minidump file exists and is > 0 bytes. + struct stat st; + ASSERT_EQ(0, stat(minidump_file, &st)); + ASSERT_LT(0, st.st_size); + + // Child process should have exited with a zero status. + int ret; + ASSERT_EQ(pid, waitpid(pid, &ret, 0)); + EXPECT_NE(0, WIFEXITED(ret)); + EXPECT_EQ(0, WEXITSTATUS(ret)); + + // Read the minidump. Locate the exception record and the + // memory list, and then ensure that there is only one memory region + // in the memory list (the thread memory from the single thread). + Minidump minidump(minidump_file); + ASSERT_TRUE(minidump.Read()); + + MinidumpException* exception = minidump.GetException(); + MinidumpMemoryList* memory_list = minidump.GetMemoryList(); + ASSERT_TRUE(exception); + ASSERT_TRUE(memory_list); + ASSERT_EQ((unsigned int)1, memory_list->region_count()); +} + +static void *Junk(void *) { + sleep(1000000); + return NULL; +} + +// Test that the memory list gets written correctly when multiple +// threads are running. +TEST_F(ExceptionHandlerTest, MemoryListMultipleThreads) { + // Give the child process a pipe to report back on. + int fds[2]; + ASSERT_EQ(0, pipe(fds)); + + pid_t pid = fork(); + if (pid == 0) { + close(fds[0]); + ExceptionHandler eh(tempDir.path(), NULL, MDCallback, &fds[1], true, NULL); + + // Run an extra thread so >2 memory regions will be written. + pthread_t junk_thread; + if (pthread_create(&junk_thread, NULL, Junk, NULL) == 0) + pthread_detach(junk_thread); + + // Just crash. + Crasher(); + + // not reached + exit(1); + } + // In the parent process. + ASSERT_NE(-1, pid); + close(fds[1]); + + // Wait for the background process to return the minidump file. + close(fds[1]); + char minidump_file[PATH_MAX]; + ssize_t nbytes = read(fds[0], minidump_file, sizeof(minidump_file)); + ASSERT_NE(0, nbytes); + // Ensure that minidump file exists and is > 0 bytes. + struct stat st; + ASSERT_EQ(0, stat(minidump_file, &st)); + ASSERT_LT(0, st.st_size); + + // Child process should have exited with a zero status. + int ret; + ASSERT_EQ(pid, waitpid(pid, &ret, 0)); + EXPECT_NE(0, WIFEXITED(ret)); + EXPECT_EQ(0, WEXITSTATUS(ret)); + + // Read the minidump, and verify that the memory list can be read. + Minidump minidump(minidump_file); + ASSERT_TRUE(minidump.Read()); + + MinidumpMemoryList* memory_list = minidump.GetMemoryList(); + ASSERT_TRUE(memory_list); + // Verify that there are three memory regions: + // one per thread, and one for the instruction pointer memory. + ASSERT_EQ((unsigned int)3, memory_list->region_count()); +} + +} |