diff options
Diffstat (limited to 'tests/functional/reverse_debugging.py')
| -rw-r--r-- | tests/functional/reverse_debugging.py | 65 |
1 files changed, 30 insertions, 35 deletions
diff --git a/tests/functional/reverse_debugging.py b/tests/functional/reverse_debugging.py index 68cfcb3..86fca8d 100644 --- a/tests/functional/reverse_debugging.py +++ b/tests/functional/reverse_debugging.py @@ -36,14 +36,13 @@ class ReverseDebugging(LinuxKernelTest): STEPS = 10 def run_vm(self, record, shift, args, replay_path, image_path, port): - logger = logging.getLogger('replay') vm = self.get_vm(name='record' if record else 'replay') vm.set_console() if record: - logger.info('recording the execution...') + self.log.info('recording the execution...') mode = 'record' else: - logger.info('replaying the execution...') + self.log.info('replaying the execution...') mode = 'replay' vm.add_args('-gdb', 'tcp::%d' % port, '-S') vm.add_args('-icount', 'shift=%s,rr=%s,rrfile=%s,rrsnapshot=init' % @@ -68,10 +67,8 @@ class ReverseDebugging(LinuxKernelTest): def reverse_debugging(self, gdb_arch, shift=7, args=None): from qemu_test import GDB - logger = logging.getLogger('replay') - # create qcow2 for snapshots - logger.info('creating qcow2 image for VM snapshots') + self.log.info('creating qcow2 image for VM snapshots') image_path = os.path.join(self.workdir, 'disk.qcow2') qemu_img = get_qemu_img(self) if qemu_img is None: @@ -79,7 +76,7 @@ class ReverseDebugging(LinuxKernelTest): 'create the temporary qcow2 image') out = check_output([qemu_img, 'create', '-f', 'qcow2', image_path, '128M'], encoding='utf8') - logger.info("qemu-img: %s" % out) + self.log.info("qemu-img: %s" % out) replay_path = os.path.join(self.workdir, 'replay.bin') @@ -90,7 +87,7 @@ class ReverseDebugging(LinuxKernelTest): last_icount = self.vm_get_icount(vm) vm.shutdown() - logger.info("recorded log with %s+ steps" % last_icount) + self.log.info("recorded log with %s+ steps" % last_icount) # replay and run debug commands with Ports() as ports: @@ -98,9 +95,16 @@ class ReverseDebugging(LinuxKernelTest): vm = self.run_vm(False, shift, args, replay_path, image_path, port) try: - logger.info('Connecting to gdbstub...') - self.reverse_debugging_run(vm, port, gdb_arch, last_icount) - logger.info('Test passed.') + self.log.info('Connecting to gdbstub...') + gdb_cmd = os.getenv('QEMU_TEST_GDB') + gdb = GDB(gdb_cmd) + try: + self.reverse_debugging_run(gdb, vm, port, gdb_arch, last_icount) + finally: + self.log.info('exiting gdb and qemu') + gdb.exit() + vm.shutdown() + self.log.info('Test passed.') except GDB.TimeoutError: # Convert a GDB timeout exception into a unittest failure exception. raise self.failureException("Timeout while connecting to or " @@ -110,12 +114,7 @@ class ReverseDebugging(LinuxKernelTest): # skipTest(), etc. raise - def reverse_debugging_run(self, vm, port, gdb_arch, last_icount): - logger = logging.getLogger('replay') - - gdb_cmd = os.getenv('QEMU_TEST_GDB') - gdb = GDB(gdb_cmd) - + def reverse_debugging_run(self, gdb, vm, port, gdb_arch, last_icount): r = gdb.cli("set architecture").get_log() if gdb_arch not in r: self.skipTest(f"GDB does not support arch '{gdb_arch}'") @@ -135,43 +134,43 @@ class ReverseDebugging(LinuxKernelTest): gdb.cli("set debug remote 0") - logger.info('stepping forward') + self.log.info('stepping forward') steps = [] # record first instruction addresses for _ in range(self.STEPS): pc = self.get_pc(gdb) - logger.info('saving position %x' % pc) + self.log.info('saving position %x' % pc) steps.append(pc) gdb.cli("stepi") # visit the recorded instruction in reverse order - logger.info('stepping backward') + self.log.info('stepping backward') for addr in steps[::-1]: - logger.info('found position %x' % addr) + self.log.info('found position %x' % addr) gdb.cli("reverse-stepi") pc = self.get_pc(gdb) if pc != addr: - logger.info('Invalid PC (read %x instead of %x)' % (pc, addr)) + self.log.info('Invalid PC (read %x instead of %x)' % (pc, addr)) self.fail('Reverse stepping failed!') # visit the recorded instruction in forward order - logger.info('stepping forward') + self.log.info('stepping forward') for addr in steps: - logger.info('found position %x' % addr) + self.log.info('found position %x' % addr) pc = self.get_pc(gdb) if pc != addr: - logger.info('Invalid PC (read %x instead of %x)' % (pc, addr)) + self.log.info('Invalid PC (read %x instead of %x)' % (pc, addr)) self.fail('Forward stepping failed!') gdb.cli("stepi") # set breakpoints for the instructions just stepped over - logger.info('setting breakpoints') + self.log.info('setting breakpoints') for addr in steps: gdb.cli(f"break *{hex(addr)}") # this may hit a breakpoint if first instructions are executed # again - logger.info('continuing execution') + self.log.info('continuing execution') vm.qmp('replay-break', icount=last_icount - 1) # continue - will return after pausing # This can stop at the end of the replay-break and gdb gets a SIGINT, @@ -180,12 +179,12 @@ class ReverseDebugging(LinuxKernelTest): gdb.cli("continue") if self.vm_get_icount(vm) == last_icount - 1: - logger.info('reached the end (icount %s)' % (last_icount - 1)) + self.log.info('reached the end (icount %s)' % (last_icount - 1)) else: - logger.info('hit a breakpoint again at %x (icount %s)' % + self.log.info('hit a breakpoint again at %x (icount %s)' % (self.get_pc(gdb), self.vm_get_icount(vm))) - logger.info('running reverse continue to reach %x' % steps[-1]) + self.log.info('running reverse continue to reach %x' % steps[-1]) # reverse continue - will return after stopping at the breakpoint gdb.cli("reverse-continue") @@ -195,8 +194,4 @@ class ReverseDebugging(LinuxKernelTest): if pc != steps[-1]: self.fail("'reverse-continue' did not hit the first PC in reverse order!") - logger.info('successfully reached %x' % steps[-1]) - - logger.info('exiting gdb and qemu') - gdb.exit() - vm.shutdown() + self.log.info('successfully reached %x' % steps[-1]) |