|
| 1 | + |
| 2 | + |
| 3 | +class GdbException(Exception): |
| 4 | + def __init__(self, message="False"): |
| 5 | + self.message = message |
| 6 | + |
| 7 | + def __str__(self): |
| 8 | + return '\n ERROR: {0}\n'.format(repr(self.message)) |
| 9 | + |
| 10 | + |
| 11 | +class GDBobj: |
| 12 | + def __init__(self, cmd, env, attach=False): |
| 13 | + self.verbose = env.verbose |
| 14 | + self.output = '' |
| 15 | + |
| 16 | + # Check gdb flag is set up |
| 17 | + if not env.gdb: |
| 18 | + raise GdbException("No `PGPROBACKUP_GDB=on` is set, " |
| 19 | + "test should call ProbackupTest::check_gdb_flag_or_skip_test() on its start " |
| 20 | + "and be skipped") |
| 21 | + # Check gdb presense |
| 22 | + try: |
| 23 | + gdb_version, _ = subprocess.Popen( |
| 24 | + ['gdb', '--version'], |
| 25 | + stdout=subprocess.PIPE |
| 26 | + ).communicate() |
| 27 | + except OSError: |
| 28 | + raise GdbException("Couldn't find gdb on the path") |
| 29 | + |
| 30 | + self.base_cmd = [ |
| 31 | + 'gdb', |
| 32 | + '--interpreter', |
| 33 | + 'mi2', |
| 34 | + ] |
| 35 | + |
| 36 | + if attach: |
| 37 | + self.cmd = self.base_cmd + ['--pid'] + cmd |
| 38 | + else: |
| 39 | + self.cmd = self.base_cmd + ['--args'] + cmd |
| 40 | + |
| 41 | + # Get version |
| 42 | + gdb_version_number = re.search( |
| 43 | + b"^GNU gdb [^\d]*(\d+)\.(\d)", |
| 44 | + gdb_version) |
| 45 | + self.major_version = int(gdb_version_number.group(1)) |
| 46 | + self.minor_version = int(gdb_version_number.group(2)) |
| 47 | + |
| 48 | + if self.verbose: |
| 49 | + print([' '.join(map(str, self.cmd))]) |
| 50 | + |
| 51 | + self.proc = subprocess.Popen( |
| 52 | + self.cmd, |
| 53 | + stdin=subprocess.PIPE, |
| 54 | + stdout=subprocess.PIPE, |
| 55 | + stderr=subprocess.STDOUT, |
| 56 | + bufsize=0, |
| 57 | + universal_newlines=True |
| 58 | + ) |
| 59 | + self.gdb_pid = self.proc.pid |
| 60 | + |
| 61 | + while True: |
| 62 | + line = self.get_line() |
| 63 | + |
| 64 | + if 'No such process' in line: |
| 65 | + raise GdbException(line) |
| 66 | + |
| 67 | + if not line.startswith('(gdb)'): |
| 68 | + pass |
| 69 | + else: |
| 70 | + break |
| 71 | + |
| 72 | + def get_line(self): |
| 73 | + line = self.proc.stdout.readline() |
| 74 | + self.output += line |
| 75 | + return line |
| 76 | + |
| 77 | + def kill(self): |
| 78 | + self.proc.kill() |
| 79 | + self.proc.wait() |
| 80 | + |
| 81 | + def set_breakpoint(self, location): |
| 82 | + |
| 83 | + result = self._execute('break ' + location) |
| 84 | + for line in result: |
| 85 | + if line.startswith('~"Breakpoint'): |
| 86 | + return |
| 87 | + |
| 88 | + elif line.startswith('=breakpoint-created'): |
| 89 | + return |
| 90 | + |
| 91 | + elif line.startswith('^error'): #or line.startswith('(gdb)'): |
| 92 | + break |
| 93 | + |
| 94 | + elif line.startswith('&"break'): |
| 95 | + pass |
| 96 | + |
| 97 | + elif line.startswith('&"Function'): |
| 98 | + raise GdbException(line) |
| 99 | + |
| 100 | + elif line.startswith('&"No line'): |
| 101 | + raise GdbException(line) |
| 102 | + |
| 103 | + elif line.startswith('~"Make breakpoint pending on future shared'): |
| 104 | + raise GdbException(line) |
| 105 | + |
| 106 | + raise GdbException( |
| 107 | + 'Failed to set breakpoint.\n Output:\n {0}'.format(result) |
| 108 | + ) |
| 109 | + |
| 110 | + def remove_all_breakpoints(self): |
| 111 | + |
| 112 | + result = self._execute('delete') |
| 113 | + for line in result: |
| 114 | + |
| 115 | + if line.startswith('^done'): |
| 116 | + return |
| 117 | + |
| 118 | + raise GdbException( |
| 119 | + 'Failed to remove breakpoints.\n Output:\n {0}'.format(result) |
| 120 | + ) |
| 121 | + |
| 122 | + def run_until_break(self): |
| 123 | + result = self._execute('run', False) |
| 124 | + for line in result: |
| 125 | + if line.startswith('*stopped,reason="breakpoint-hit"'): |
| 126 | + return |
| 127 | + raise GdbException( |
| 128 | + 'Failed to run until breakpoint.\n' |
| 129 | + ) |
| 130 | + |
| 131 | + def continue_execution_until_running(self): |
| 132 | + result = self._execute('continue') |
| 133 | + |
| 134 | + for line in result: |
| 135 | + if line.startswith('*running') or line.startswith('^running'): |
| 136 | + return |
| 137 | + if line.startswith('*stopped,reason="breakpoint-hit"'): |
| 138 | + continue |
| 139 | + if line.startswith('*stopped,reason="exited-normally"'): |
| 140 | + continue |
| 141 | + |
| 142 | + raise GdbException( |
| 143 | + 'Failed to continue execution until running.\n' |
| 144 | + ) |
| 145 | + |
| 146 | + def continue_execution_until_exit(self): |
| 147 | + result = self._execute('continue', False) |
| 148 | + |
| 149 | + for line in result: |
| 150 | + if line.startswith('*running'): |
| 151 | + continue |
| 152 | + if line.startswith('*stopped,reason="breakpoint-hit"'): |
| 153 | + continue |
| 154 | + if ( |
| 155 | + line.startswith('*stopped,reason="exited') or |
| 156 | + line == '*stopped\n' |
| 157 | + ): |
| 158 | + return |
| 159 | + |
| 160 | + raise GdbException( |
| 161 | + 'Failed to continue execution until exit.\n' |
| 162 | + ) |
| 163 | + |
| 164 | + def continue_execution_until_error(self): |
| 165 | + result = self._execute('continue', False) |
| 166 | + |
| 167 | + for line in result: |
| 168 | + if line.startswith('^error'): |
| 169 | + return |
| 170 | + if line.startswith('*stopped,reason="exited'): |
| 171 | + return |
| 172 | + if line.startswith( |
| 173 | + '*stopped,reason="signal-received",signal-name="SIGABRT"'): |
| 174 | + return |
| 175 | + |
| 176 | + raise GdbException( |
| 177 | + 'Failed to continue execution until error.\n') |
| 178 | + |
| 179 | + def continue_execution_until_break(self, ignore_count=0): |
| 180 | + if ignore_count > 0: |
| 181 | + result = self._execute( |
| 182 | + 'continue ' + str(ignore_count), |
| 183 | + False |
| 184 | + ) |
| 185 | + else: |
| 186 | + result = self._execute('continue', False) |
| 187 | + |
| 188 | + for line in result: |
| 189 | + if line.startswith('*stopped,reason="breakpoint-hit"'): |
| 190 | + return |
| 191 | + if line.startswith('*stopped,reason="exited-normally"'): |
| 192 | + break |
| 193 | + |
| 194 | + raise GdbException( |
| 195 | + 'Failed to continue execution until break.\n') |
| 196 | + |
| 197 | + def stopped_in_breakpoint(self): |
| 198 | + while True: |
| 199 | + line = self.get_line() |
| 200 | + if self.verbose: |
| 201 | + print(line) |
| 202 | + if line.startswith('*stopped,reason="breakpoint-hit"'): |
| 203 | + return True |
| 204 | + return False |
| 205 | + |
| 206 | + def quit(self): |
| 207 | + self.proc.terminate() |
| 208 | + |
| 209 | + # use for breakpoint, run, continue |
| 210 | + def _execute(self, cmd, running=True): |
| 211 | + output = [] |
| 212 | + self.proc.stdin.flush() |
| 213 | + self.proc.stdin.write(cmd + '\n') |
| 214 | + self.proc.stdin.flush() |
| 215 | + sleep(1) |
| 216 | + |
| 217 | + # look for command we just send |
| 218 | + while True: |
| 219 | + line = self.get_line() |
| 220 | + if self.verbose: |
| 221 | + print(repr(line)) |
| 222 | + |
| 223 | + if cmd not in line: |
| 224 | + continue |
| 225 | + else: |
| 226 | + break |
| 227 | + |
| 228 | + while True: |
| 229 | + line = self.get_line() |
| 230 | + output += [line] |
| 231 | + if self.verbose: |
| 232 | + print(repr(line)) |
| 233 | + if line.startswith('^done') or line.startswith('*stopped'): |
| 234 | + break |
| 235 | + if line.startswith('^error'): |
| 236 | + break |
| 237 | + if running and (line.startswith('*running') or line.startswith('^running')): |
| 238 | +# if running and line.startswith('*running'): |
| 239 | + break |
| 240 | + return output |
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