1 // Copyright (c) 2014 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 <sys/syscall.h> 31 #include <sys/types.h> 32 #include <unistd.h> 33 34 #include <string> 35 36 #include "breakpad_googletest_includes.h" 37 #include "client/linux/handler/exception_handler.h" 38 #include "client/linux/microdump_writer/microdump_writer.h" 39 #include "common/linux/eintr_wrapper.h" 40 #include "common/linux/ignore_ret.h" 41 #include "common/scoped_ptr.h" 42 #include "common/tests/auto_tempdir.h" 43 #include "common/using_std_string.h" 44 45 using namespace google_breakpad; 46 47 namespace { 48 49 typedef testing::Test MicrodumpWriterTest; 50 51 TEST(MicrodumpWriterTest, Setup) { 52 int fds[2]; 53 ASSERT_NE(-1, pipe(fds)); 54 55 AutoTempDir temp_dir; 56 string stderr_file = temp_dir.path() + "/stderr.log"; 57 int err_fd = open(stderr_file.c_str(), O_CREAT | O_RDWR, S_IRUSR | S_IWUSR); 58 ASSERT_NE(-1, err_fd); 59 60 const pid_t child = fork(); 61 if (child == 0) { 62 close(fds[1]); 63 char b; 64 IGNORE_RET(HANDLE_EINTR(read(fds[0], &b, sizeof(b)))); 65 close(fds[0]); 66 syscall(__NR_exit); 67 } 68 close(fds[0]); 69 70 ExceptionHandler::CrashContext context; 71 memset(&context, 0, sizeof(context)); 72 73 // Set a non-zero tid to avoid tripping asserts. 74 context.tid = child; 75 76 // Push some extra mapping to check the MappingList logic. 77 const uint32_t memory_size = sysconf(_SC_PAGESIZE); 78 const char* kMemoryName = "libfoo.so"; 79 const uint8_t kModuleGUID[sizeof(MDGUID)] = { 80 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 81 0x88, 0x99, 0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF 82 }; 83 84 MappingInfo info; 85 info.start_addr = memory_size; 86 info.size = memory_size; 87 info.offset = 42; 88 strcpy(info.name, kMemoryName); 89 90 MappingList mappings; 91 MappingEntry mapping; 92 mapping.first = info; 93 memcpy(mapping.second, kModuleGUID, sizeof(MDGUID)); 94 mappings.push_back(mapping); 95 96 // Redirect temporarily stderr to the stderr.log file. 97 int save_err = dup(STDERR_FILENO); 98 ASSERT_NE(-1, save_err); 99 ASSERT_NE(-1, dup2(err_fd, STDERR_FILENO)); 100 101 ASSERT_TRUE(WriteMicrodump(child, &context, sizeof(context), mappings)); 102 103 // Revert stderr back to the console. 104 dup2(save_err, STDERR_FILENO); 105 close(save_err); 106 107 // Read back the stderr file and check for the microdump marker. 108 fsync(err_fd); 109 lseek(err_fd, 0, SEEK_SET); 110 const size_t kBufSize = 64 * 1024; 111 scoped_array<char> buf(new char[kBufSize]); 112 ASSERT_GT(read(err_fd, buf.get(), kBufSize), 0); 113 114 ASSERT_NE(static_cast<char*>(0), strstr( 115 buf.get(), "-----BEGIN BREAKPAD MICRODUMP-----")); 116 ASSERT_NE(static_cast<char*>(0), strstr( 117 buf.get(), "-----END BREAKPAD MICRODUMP-----")); 118 119 #ifdef __LP64__ 120 ASSERT_NE(static_cast<char*>(0), strstr( 121 buf.get(), "M 0000000000001000 000000000000002A 0000000000001000 " 122 "33221100554477668899AABBCCDDEEFF0 libfoo.so")); 123 #else 124 ASSERT_NE(static_cast<char*>(0), strstr( 125 buf.get(), "M 00001000 0000002A 00001000 " 126 "33221100554477668899AABBCCDDEEFF0 libfoo.so")); 127 #endif 128 129 close(err_fd); 130 close(fds[1]); 131 } 132 133 } // namespace 134
