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| Original file line number | Diff line number | Diff line change |
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| #!/usr/bin/env python | ||
| # Copyright (c) 2018 Adrian Herrera | ||
| # | ||
| # Licensed under the Apache License, Version 2.0 (the "License"); | ||
| # you may not use this file except in compliance with the License. | ||
| # You may obtain a copy of the License at | ||
| # | ||
| # http://www.apache.org/licenses/LICENSE-2.0 | ||
| # | ||
| # Unless required by applicable law or agreed to in writing, software | ||
| # distributed under the License is distributed on an "AS IS" BASIS, | ||
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| # See the License for the specific language governing permissions and | ||
| # limitations under the License. | ||
|
|
||
| import logging | ||
| import os | ||
|
|
||
| from s2e_env.manage import call_command | ||
| from s2e_env.commands.new_project import Command as NewProjectCommand | ||
| from s2e_env.utils import log as s2e_log | ||
|
|
||
| from deepstate.common import LOG_LEVEL_DEBUG, LOG_LEVEL_TRACE, LOG_LEVEL_INFO, \ | ||
| LOG_LEVEL_WARNING, LOG_LEVEL_ERROR, LOG_LEVEL_FATAL | ||
| from .common import DeepState | ||
| from .s2e.project import DeepStateProject | ||
|
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|
|
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| L = logging.getLogger("deepstate.s2e") | ||
| L.setLevel(logging.INFO) | ||
|
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| LOG_LEVEL_TO_LOGGING_LEVEL = { | ||
| LOG_LEVEL_DEBUG: logging.DEBUG, | ||
| LOG_LEVEL_TRACE: 15, | ||
| LOG_LEVEL_INFO: logging.INFO, | ||
| LOG_LEVEL_WARNING: logging.WARNING, | ||
| LOG_LEVEL_ERROR: logging.ERROR, | ||
| LOG_LEVEL_FATAL: logging.CRITICAL, | ||
| } | ||
|
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||
|
|
||
| def get_s2e_env(): | ||
| s2e_env_dir = os.getenv("S2EDIR") | ||
| if not s2e_env_dir: | ||
| raise Exception("S2EDIR environment variable not specified. Ensure " | ||
| "that s2e_activate.sh has been sourced") | ||
| if not os.path.isdir(s2e_env_dir): | ||
| raise Exception("S2EDIR {} is invalid".format(s2e_env_dir)) | ||
|
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| return s2e_env_dir | ||
|
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|
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| def main(): | ||
| """ | ||
| Create an s2e-env project that is suitable for analyzing a DeepState test. | ||
| """ | ||
| args = DeepState.parse_args() | ||
|
|
||
| # Sync S2E and DeepState logging levels | ||
| s2e_log.configure_logging(level=LOG_LEVEL_TO_LOGGING_LEVEL[args.verbosity]) | ||
|
|
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| try: | ||
| s2e_env_path = get_s2e_env() | ||
| proj_name = "{}-deepstate".format(os.path.basename(args.binary)) | ||
|
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| call_command(NewProjectCommand(), args.binary, env=s2e_env_path, | ||
| name=proj_name, project_class=DeepStateProject, | ||
| **vars(args)) | ||
| except Exception as e: | ||
| L.critical("Cannot create an S2E project for %s: %s", args.binary, e) | ||
| return 1 | ||
|
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| return 0 | ||
|
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| if __name__ == '__main__': | ||
| exit(main()) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,203 @@ | ||
| # Copyright (c) 2018 Adrian Herrera | ||
| # | ||
| # Licensed under the Apache License, Version 2.0 (the "License"); | ||
| # you may not use this file except in compliance with the License. | ||
| # You may obtain a copy of the License at | ||
| # | ||
| # http://www.apache.org/licenses/LICENSE-2.0 | ||
| # | ||
| # Unless required by applicable law or agreed to in writing, software | ||
| # distributed under the License is distributed on an "AS IS" BASIS, | ||
| # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| # See the License for the specific language governing permissions and | ||
| # limitations under the License. | ||
|
|
||
|
|
||
| import datetime | ||
| import logging | ||
| import os | ||
| import shutil | ||
|
|
||
| from s2e_env.command import CommandError | ||
| from s2e_env.commands.project_creation.abstract_project import AbstractProject | ||
| from s2e_env.utils.templates import render_template | ||
|
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||
|
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| L = logging.getLogger('deepstate.s2e') | ||
| L.setLevel(logging.INFO) | ||
|
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||
| # Only Linux targets are supported | ||
| ARCH_TO_IMAGE = { | ||
| 'i386': 'debian-9.2.1-i386', | ||
| 'x86_64': 'debian-9.2.1-x86_64', | ||
| } | ||
|
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||
| DEEPSTATE_TEMPLATES_DIR = os.path.join(os.path.dirname(__file__), 'templates') | ||
|
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| INSTRUCTIONS = """ | ||
| Your DeepState project is available in {project_dir}. | ||
| This is a simplified version of a regular S2E analysis project. To start the | ||
| analysis: | ||
| * cd {project_dir} && ./launch-s2e.sh | ||
| This will run the DeepState-enabled program in an S2E guest VM. The generated | ||
| tests will appear in the s2e-last/tests directory. The tests can be run using | ||
| the `--input_test_files_dir` option on a **NON** S2E-compiled program (running | ||
| an S2E-compiled program **outside** of S2E will result in an illegal | ||
| instruction error). | ||
| Customization | ||
| ============= | ||
| * By default, your analysis will run with {num_workers} worker(s). This can be | ||
| changed by modifying the S2E_MAX_PROCESSES variable in launch-s2e.sh | ||
| * If your target program depends on other files (e.g., shared libraries, etc.), | ||
| then these should be retrieved in bootstrap.sh by adding a call to ${{S2EGET}} | ||
| * Only the minimum plugins required to generate tests have been enabled. To | ||
| enable more, edit s2e-config.lua | ||
| """ | ||
|
|
||
|
|
||
| class DeepStateProject(AbstractProject): | ||
| """A simplified S2E analysis project for DeepState-compiled programs.""" | ||
|
|
||
| def _configure(self, target, *args, **options): | ||
| """ | ||
| Generate the S2E analysis project configuration. | ||
| """ | ||
| if target.is_empty(): | ||
| raise CommandError('Cannot use an empty target for a DeepState ' | ||
| 'project') | ||
|
|
||
| # Decide on the image to use | ||
| image = ARCH_TO_IMAGE.get(target.arch) | ||
| if not image: | ||
| raise CommandError('Unable to find a suitable image for %s' % | ||
| target.path) | ||
| img_desc = self._select_image(target, image, download_image=False) | ||
| L.info('Using %s', img_desc['name']) | ||
|
|
||
| # Determine if guestfs is available for this image | ||
| guestfs_path = self._select_guestfs(img_desc) | ||
| if not guestfs_path: | ||
| L.warn('No guestfs available. The VMI plugin may not run optimally') | ||
|
|
||
| # Return the project config dict | ||
| return { | ||
| 'creation_time': str(datetime.datetime.now()), | ||
| 'project_dir': self.env_path('projects', options['name']), | ||
| 'image': img_desc, | ||
| 'has_guestfs': guestfs_path is not None, | ||
| 'guestfs_path': guestfs_path, | ||
| 'target_path': target.path, | ||
| 'target_arch': target.arch, | ||
| 'num_workers': options['num_workers'], | ||
| } | ||
|
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| def _create(self, config, force=False): | ||
| """ | ||
| Create the S2E analysis project, based on the given configuration. | ||
| """ | ||
| project_dir = config['project_dir'] | ||
|
|
||
| # The force option is not exposed on the command-line for a DeepState | ||
| # project, so fail if the project directory already exists | ||
| if os.path.isdir(project_dir): | ||
| raise CommandError('Project directory %s already exists' % | ||
| project_dir) | ||
|
|
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| os.mkdir(project_dir) | ||
|
|
||
| try: | ||
| # Create a symlink to the analysis target | ||
| self._symlink_project_files(project_dir, config['target_path']) | ||
|
|
||
| # Create a symlink to the guest tools directory | ||
| self._symlink_guest_tools(project_dir, config['image']) | ||
|
|
||
| # Create a symlink to the guestfs (if it exists) | ||
| if config['guestfs_path']: | ||
| self._symlink_guestfs(project_dir, config['guestfs_path']) | ||
|
|
||
| # Render the templates | ||
| self._create_launch_script(project_dir, config) | ||
| self._create_lua_config(project_dir, config) | ||
| self._create_bootstrap(project_dir, config) | ||
| except Exception: | ||
| # If anything goes wrong during project creation, remove anything | ||
| # incomplete | ||
| shutil.rmtree(project_dir) | ||
| raise | ||
|
|
||
| return project_dir | ||
|
|
||
| def _get_instructions(self, config): | ||
| """ | ||
| Generate instructions. | ||
| """ | ||
| return INSTRUCTIONS.format(**config) | ||
|
|
||
| def _create_launch_script(self, project_dir, config): | ||
| """ | ||
| Create the S2E launch script. | ||
| """ | ||
| L.info('Creating launch script') | ||
|
|
||
| img_desc = config['image'] | ||
| context = { | ||
| 'creation_time': config['creation_time'], | ||
| 'env_dir': self.env_path(), | ||
| 'rel_image_path': os.path.relpath(img_desc['path'], self.env_path()), | ||
| 'max_processes': config['num_workers'], | ||
| 'qemu_arch': img_desc['qemu_build'], | ||
| 'qemu_memory': img_desc['memory'], | ||
| 'qemu_snapshot': img_desc['snapshot'], | ||
| 'qemu_extra_flags': img_desc['qemu_extra_flags'], | ||
| } | ||
|
|
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| output_file = 'launch-s2e.sh' | ||
| output_path = os.path.join(project_dir, output_file) | ||
|
|
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| render_template(context, '%s.j2' % output_file, output_path, | ||
| templates_dir=DEEPSTATE_TEMPLATES_DIR, executable=True) | ||
|
|
||
| def _create_lua_config(self, project_dir, config): | ||
| """ | ||
| Create the S2E Lua config. | ||
| """ | ||
| L.info('Creating S2E configuration') | ||
|
|
||
| self._copy_lua_library(project_dir) | ||
|
|
||
| context = { | ||
| 'creation_time': config['creation_time'], | ||
| 'project_dir': config['project_dir'], | ||
| 'target_process': os.path.basename(config['target_path']), | ||
| 'has_guestfs': config['has_guestfs'], | ||
| 'guestfs_path': config['guestfs_path'], | ||
| } | ||
|
|
||
| output_file = 's2e-config.lua' | ||
| output_path = os.path.join(project_dir, output_file) | ||
|
|
||
| render_template(context, '%s.j2' % output_file, output_path, | ||
| templates_dir=DEEPSTATE_TEMPLATES_DIR) | ||
|
|
||
| def _create_bootstrap(self, project_dir, config): | ||
| """ | ||
| Create the S2E bootstrap script. | ||
| """ | ||
| L.info('Creating S2E bootstrap script') | ||
|
|
||
| context = { | ||
| 'creation_time': config['creation_time'], | ||
| 'target': os.path.basename(config['target_path']), | ||
| } | ||
|
|
||
| output_file = 'bootstrap.sh' | ||
| output_path = os.path.join(project_dir, output_file) | ||
|
|
||
| render_template(context, '%s.j2' % output_file, output_path, | ||
| templates_dir=DEEPSTATE_TEMPLATES_DIR) |
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