def make_shader_test_string(shader_job: str, nodraw: bool) -> str:
"""
Makes a piglit shader_test from a shader job and shader.
:param shader_job: The path to the shader job file.
:param nodraw: determines if the draw command is added to draw the shader.
:return: the shader_test
"""
shader_job_json_parsed = get_json_properties(shader_job)
with gfuzz_common.open_helper(get_shader_from_job(shader_job),
'r') as shader:
shader_file_string = shader.read()
shader_lines = shader_file_string.split('\n')
shader_test_string = ''
# The version header always has to be on the first line of the shader.
shader_version_header = shader_lines[0]
shader_test_string += make_require_header(shader_version_header) + '\n'
shader_test_string += make_vertex_shader_header() + '\n'
shader_test_string += make_fragment_shader_header(
shader_file_string) + '\n'
shader_test_string += make_test_header(shader_job_json_parsed, nodraw)
return shader_test_string
def main_helper(args: List[str]) -> None:
"""
Main function. Parses arguments, delegates to other functions to write the shader_test string,
and writes the string to file.
:param args: the command line arguments.
"""
description = (
'Given a GraphicsFuzz shader job JSON file, produce a Mesa piglit shader_test file. '
'The shader test will be the same name as the shader job.')
argparser = argparse.ArgumentParser(description=description)
argparser.add_argument(
'shader_job', help='Path to the GraphicsFuzz shader job JSON file.')
argparser.add_argument(
'--nodraw',
action='store_true',
help=
'Do not draw the shader output when running the test. Useful for crash testing.'
)
args = argparser.parse_args(args)
test_string = make_shader_test_string(args.shader_job, args.nodraw)
with gfuzz_common.open_helper(get_shader_test_from_job(args.shader_job),
'w') as shader_test:
shader_test.write(test_string)
def get_json_properties(shader_job: str) -> dict:
"""
Helper function to parse a shader job JSON file into a dict of properties.
Throws IOError if the file can't be parsed.
:param shader_job: the path to the shader job file.
:return: a dict of JSON properties.
"""
with gfuzz_common.open_helper(shader_job, 'r') as job:
json_parsed = json.load(job)
return json_parsed
def dump_glxinfo(filename: str) -> None:
"""
Helper function that dumps the stable results of 'glxinfo -B' to a JSON file. Removes any
file with the same name as filename before writing. Will throw an exception if 'glxinfo'
fails or the JSON file can't be written.
:param filename: the filename to write to.
"""
# There are some useless or unstable lines in glxinfo we need to remove before trying to parse
# into JSON.
glxinfo_lines = filter(
lambda glx_line: 'OpenGL' in glx_line,
gfuzz_common.subprocess_helper(glxinfo_cmd()).stdout.split('\n'))
# We form keys out of the OpenGL info descriptors and values out of the hardware dependent
# strings. For example, "OpenGL version string: 4.6.0 NVIDIA 430.14" would become
# { "OpenGL version string": "4.6.0 NVIDIA 430.14" }.
glx_dict = dict()
for line in glxinfo_lines:
prop = line.split(': ')
assert len(prop) is 2
glx_dict.update({prop[0]: prop[1]})
with gfuzz_common.open_helper(filename, 'w') as info_file:
info_file.write(json.JSONEncoder().encode(glx_dict))
def main():
description = (
'Uses the piglit GLES3 shader runner to render shader jobs.')
parser = argparse.ArgumentParser(description=description)
# Required
parser.add_argument('worker_name',
help='The name that will refer to this worker.')
# Optional
parser.add_argument(
'--server',
default='http://localhost:8080',
help='Server URL to connect to (default: http://localhost:8080 )')
args = parser.parse_args()
gfuzz_common.tool_on_path('shader_runner_gles3')
gfuzz_common.log('Worker: ' + args.worker_name)
server = args.server + '/request'
gfuzz_common.log('server: ' + server)
# Get worker info
worker_info_json_string = '{}'
gfuzz_common.log('Dumping glxinfo to file for worker info string...')
try:
dump_glxinfo(WORKER_INFO_FILE)
with gfuzz_common.open_helper(WORKER_INFO_FILE, 'r') as info_file:
worker_info_json_string = info_file.read()
except Exception as ex:
gfuzz_common.log(str(ex))
gfuzz_common.log('Could not get worker info, continuing without it.')
service = None
worker = None
while True:
if not service:
gfuzz_common.log('Connecting to server...')
service, worker = thrift_connect(server, args.worker_name,
worker_info_json_string)
if not service:
gfuzz_common.log('Failed to connect, retrying...')
time.sleep(1)
continue
assert worker
os.makedirs(worker, exist_ok=True)
try:
job = service.getJob(worker)
if job.noJob is not None:
gfuzz_common.log("No job")
elif job.skipJob is not None:
gfuzz_common.log("Skip job")
service.jobDone(worker, job)
else:
assert job.imageJob
if job.imageJob.computeSource:
gfuzz_common.log("Got a compute job, but this worker "
"doesn't support compute shaders.")
job.imageJob.result = tt.ImageJobResult()
job.imageJob.result.status = tt.JobStatus.UNEXPECTED_ERROR
else:
gfuzz_common.log("#### Image job: " + job.imageJob.name)
job.imageJob.result = do_image_job(job.imageJob,
work_dir=worker)
gfuzz_common.log("Sending back, results status: {}".format(
job.imageJob.result.status))
service.jobDone(worker, job)
gfuzz_common.remove(worker)
continue
except (TApplicationException, ConnectionError):
gfuzz_common.log(
"Connection to server lost. Re-initialising client.")
service = None
time.sleep(1)
def run_image_job(json_file: str, status_file: str, png_file: str,
output_dir: str, skip_render: bool):
"""
Runs an image job. Converts the shader job to a piglit shader_test file, then delegates to
run_shader_test to render with shader_runner. Writes the status of the job to file.
:param json_file: The JSON uniforms to use with the shader.
:param status_file: The status file to write to.
:param png_file: The PNG file to write to.
:param output_dir: The directory to use for the job.
:param skip_render: whether to skip rendering or not.
"""
use_catchsegv = True
try:
gfuzz_common.tool_on_path('catchsegv')
except gfuzz_common.ToolNotOnPathError:
use_catchsegv = False
assert os.path.isdir(output_dir)
assert os.path.isfile(json_file)
arglist = [json_file]
if skip_render:
arglist.append(NO_DRAW_ARG)
shader_test_file = graphicsfuzz_piglit_converter.get_shader_test_from_job(
json_file)
try:
gfuzz_common.log('Creating shader_test file...')
graphicsfuzz_piglit_converter.main_helper(arglist)
except Exception as ex:
gfuzz_common.log('Could not create shader_test from the given job.')
raise ex
shader_runner_cmd_list = shader_runner_cmd() + \
[shader_test_file, SHADER_RUNNER_ARG_AUTO,
SHADER_RUNNER_ARG_UNIFORMS, SHADER_RUNNER_ARG_FBO, SHADER_RUNNER_ARG_SUBTESTS]
if use_catchsegv:
shader_runner_cmd_list.insert(0, catchsegv_cmd())
if not skip_render:
shader_runner_cmd_list.append(SHADER_RUNNER_ARG_PNG)
gfuzz_common.remove(PNG_FILENAME)
gfuzz_common.remove(COMPARE_PNG_FILENAME)
status = \
gfuzz_common.run_catchsegv(shader_runner_cmd_list, timeout=TIMEOUT, verbose=True) \
if use_catchsegv else \
gfuzz_common.subprocess_helper(shader_runner_cmd_list, timeout=TIMEOUT, verbose=True)
# Piglit throws the output PNG render into whatever the current working directory is
# (and there's no way to specify a location to write to) - we need to move it to wherever our
# output is.
if not skip_render and status == STATUS_SUCCESS:
try:
# An image was rendered, so we need to check for nondet. We do this by renaming the
# rendered image, rendering a second image, and using filecmp to compare the files.
assert os.path.isfile(PNG_FILENAME), \
"Shader runner successfully rendered, but no image was dumped?"
gfuzz_common.log(
'An image was rendered - rendering again to check for nondet.')
os.rename(PNG_FILENAME, COMPARE_PNG_FILENAME)
status = \
gfuzz_common.run_catchsegv(shader_runner_cmd_list, timeout=TIMEOUT, verbose=True) \
if use_catchsegv else \
gfuzz_common.subprocess_helper(shader_runner_cmd_list, timeout=TIMEOUT, verbose=True)
# Something is horribly wrong if shader crashes/timeouts are inconsistent per shader.
assert status == STATUS_SUCCESS, \
"Shader inconsistently fails - check your graphics drivers?"
assert os.path.isfile(PNG_FILENAME), \
"Shader runner successfully rendered, but no image was dumped?"
gfuzz_common.log('Comparing dumped PNG images...')
if filecmp.cmp(PNG_FILENAME, COMPARE_PNG_FILENAME):
gfuzz_common.log('Images are identical.')
shutil.move(PNG_FILENAME, png_file)
else:
gfuzz_common.log('Images are different.')
status = STATUS_NONDET
shutil.move(COMPARE_PNG_FILENAME,
os.path.join(output_dir, NONDET0_PNG))
shutil.move(PNG_FILENAME, os.path.join(output_dir,
NONDET1_PNG))
finally:
gfuzz_common.log('Removing dumped images...')
gfuzz_common.remove(PNG_FILENAME)
gfuzz_common.remove(COMPARE_PNG_FILENAME)
gfuzz_common.log('STATUS: ' + status)
with gfuzz_common.open_helper(status_file, 'w') as f:
f.write(status)
def do_image_job(image_job: tt.ImageJob, work_dir: str) -> tt.ImageJobResult:
"""
Does an image job. Sets up directories and some files, then delegates to run_image_job to
convert the job to a shader_test and run it. Sets a global logfile to log to for the lifetime
of the function. Gets the status of the shader job from a file that is written to by
run_image_job.
:param image_job: the image job containing the shader/uniforms.
:param work_dir: the directory to work in.
:return: the result of the image job, including the log, PNG and status.
"""
# Output directory is based on the name of job.
output_dir = os.path.join(work_dir, image_job.name)
# Delete and create output directory.
gfuzz_common.remove(output_dir)
os.makedirs(output_dir, exist_ok=True)
name = image_job.name
if name.endswith('.frag'):
name = gfuzz_common.remove_end(name, '.frag')
frag_file = os.path.join(output_dir, name + FRAG_SUFFIX)
json_file = os.path.join(output_dir, name + JSON_SUFFIX)
log_file = os.path.join(output_dir, LOGFILE_NAME)
status_file = os.path.join(output_dir, STATUS_FILENAME)
png_file = os.path.join(output_dir, name + PNG_SUFFIX)
nondet_0 = os.path.join(output_dir, NONDET0_PNG)
nondet_1 = os.path.join(output_dir, NONDET1_PNG)
gfuzz_common.write_to_file(image_job.fragmentSource, frag_file)
gfuzz_common.write_to_file(image_job.uniformsInfo, json_file)
res = tt.ImageJobResult()
# Set nice defaults to fields we will not update anyway
res.passSanityCheck = True
res.log = 'Start: ' + name + '\n'
with gfuzz_common.open_helper(log_file, 'w') as f:
try:
gfuzz_common.set_logfile(f)
run_image_job(json_file, status_file, png_file, output_dir,
image_job.skipRender)
except Exception as ex:
gfuzz_common.log(str(ex))
gfuzz_common.log('Removing status file and continuing...')
gfuzz_common.remove(status_file)
finally:
gfuzz_common.unset_logfile()
if os.path.isfile(log_file):
with gfuzz_common.open_helper(log_file, 'r') as f:
res.log += f.read()
if os.path.isfile(png_file):
with gfuzz_common.open_bin_helper(png_file, 'rb') as f:
res.PNG = f.read()
if os.path.isfile(status_file):
with gfuzz_common.open_helper(status_file, 'r') as f:
status = f.read().rstrip()
if status == STATUS_SUCCESS:
res.status = tt.JobStatus.SUCCESS
elif status == STATUS_CRASH:
res.status = tt.JobStatus.CRASH
elif status == STATUS_TIMEOUT:
res.status = tt.JobStatus.TIMEOUT
elif status == STATUS_UNEXPECTED:
res.status = tt.JobStatus.UNEXPECTED_ERROR
elif status == STATUS_NONDET:
res.status = tt.JobStatus.NONDET
with gfuzz_common.open_bin_helper(nondet_0, 'rb') as f:
res.PNG = f.read()
with gfuzz_common.open_bin_helper(nondet_1, 'rb') as f:
res.PNG2 = f.read()
else:
res.log += '\nUnknown status value: ' + status + '\n'
res.status = tt.JobStatus.UNEXPECTED_ERROR
else:
# Not even a status file?
res.log += '\nNo STATUS file\n'
res.status = tt.JobStatus.UNEXPECTED_ERROR
return res
def main():
parser = argparse.ArgumentParser()
# Required arguments
parser.add_argument(
'worker',
help='Worker name to identify to the server')
parser.add_argument(
'target',
help=runspv.TARGET_HELP)
# Optional arguments
parser.add_argument(
'--force',
action='store_true',
help=runspv.FORCE_OPTION_HELP)
parser.add_argument(
'--legacy-worker',
action='store_true',
help=runspv.LEGACY_OPTION_HELP)
parser.add_argument(
'--serial',
help=runspv.SERIAL_OPTION_HELP)
parser.add_argument(
'--server',
default='http://localhost:8080',
help='Server URL (default: http://localhost:8080 )')
parser.add_argument(
'--spirvopt',
help=runspv.SPIRV_OPT_OPTION_HELP + 'Pass RANDOM to have a random selection of '
'optimization arguments used for each shader job that '
'is processed. Note that this makes repeat runs of '
'the same shader job nondeterministic, as different '
'optimizer arguments may be chosen.')
parser.add_argument(
'--local-shader-job',
help='Execute a single, locally stored shader job (for debugging), instead of using the '
'server.')
parser.add_argument(
'--seed',
help='A seed to control random number generation.')
args = parser.parse_args()
# Seed the random number generator. If no seed is provided then 'None' will be used, which
# seeds the generator based on system time.
random.seed(args.seed)
spirvopt_args = None # type: Union[Optional[List[str]], str]
if args.spirvopt:
if args.spirvopt == "RANDOM":
spirvopt_args = "RANDOM"
else:
spirvopt_args = args.spirvopt.split()
# Check the target is known.
if not (args.target == 'android' or args.target == 'host'):
raise ValueError('Target must be "android" or "host"')
# Record whether or not we are targeting Android.
is_android = (args.target == 'android')
# Check the optional arguments are consistent with the target.
if not is_android and args.force:
raise ValueError('"force" option is only compatible with "android" target')
if not is_android and args.serial:
raise ValueError('"serial" option is only compatible with "android" target')
print('Worker: ' + args.worker)
server = args.server + '/request'
print('server: ' + server)
if args.serial:
os.environ['ANDROID_SERIAL'] = args.serial
service = None
worker = None
# Get worker info
worker_info_file = 'worker_info.json'
gfuzz_common.remove(worker_info_file)
worker_info_json_string = '{}'
try:
if is_android:
runspv.dump_info_android_legacy(wait_for_screen=not args.force)
else:
runspv.dump_info_host_legacy()
if not os.path.isfile(worker_info_file):
raise Exception(
'Failed to retrieve worker information. If targeting Android, make sure '
'the app permission to write to external storage is enabled.'
)
with gfuzz_common.open_helper(worker_info_file, 'r') as f:
worker_info_json_string = f.read()
except Exception as ex:
if args.legacy_worker:
raise ex
else:
print(ex)
print('Continuing without worker information.')
# Main loop
while True:
if is_android \
and 'ANDROID_SERIAL' in os.environ and \
not is_device_available(os.environ['ANDROID_SERIAL']):
raise Exception(
'#### ABORT: device {} is not available (either offline or not connected?)'
.format(os.environ['ANDROID_SERIAL'])
)
# Special case: local shader job for debugging.
if args.local_shader_job:
assert args.local_shader_job.endswith('.json'), \
'Expected local shader job "{}" to end with .json'
shader_job_prefix = gfuzz_common.remove_end(args.local_shader_job, '.json')
fake_job = tt.ImageJob()
fake_job.name = os.path.basename(shader_job_prefix)
assert os.path.isfile(args.local_shader_job), \
'Shader job {} does not exist'.format(args.local_shader_job)
with gfuzz_common.open_helper(args.local_shader_job, 'r') as f:
fake_job.uniformsInfo = f.read()
if os.path.isfile(shader_job_prefix + '.frag'):
with gfuzz_common.open_helper(shader_job_prefix + '.frag', 'r') as f:
fake_job.fragmentSource = f.read()
if os.path.isfile(shader_job_prefix + '.vert'):
with gfuzz_common.open_helper(shader_job_prefix + '.vert', 'r') as f:
fake_job.vertexSource = f.read()
if os.path.isfile(shader_job_prefix + '.comp'):
with gfuzz_common.open_helper(shader_job_prefix + '.comp', 'r') as f:
fake_job.computeSource = f.read()
fake_job.computeInfo = fake_job.uniformsInfo
do_image_job(args, fake_job, spirvopt_args, work_dir='out')
return
if not service:
service, worker = get_service(server, args, worker_info_json_string)
if not service:
print("Cannot connect to server, retry in a second...")
time.sleep(1)
continue
assert worker is not None
os.makedirs(worker, exist_ok=True)
try:
job = service.getJob(worker)
if job.noJob is not None:
print("No job")
elif job.skipJob is not None:
print("Skip job")
service.jobDone(worker, job)
else:
assert job.imageJob is not None
if job.imageJob.computeSource:
print("#### Compute job: " + job.imageJob.name)
job.imageJob.result = do_compute_job(
args,
job.imageJob,
spirvopt_args,
work_dir=worker
)
else:
print("#### Image job: " + job.imageJob.name)
job.imageJob.result = do_image_job(
args,
job.imageJob,
spirvopt_args,
work_dir=worker
)
print("Send back, results status: {}".format(job.imageJob.result.status))
service.jobDone(worker, job)
continue
except (TApplicationException, ConnectionError):
print("Connection to server lost. Re-initialising client.")
service = None
time.sleep(1)
def do_compute_job(
args,
comp_job: tt.ImageJob,
spirv_opt_args: Optional[List[str]],
work_dir: str
) -> tt.ImageJobResult:
# Output directory is based on the name of job.
output_dir = os.path.join(work_dir, comp_job.name)
# Delete and create output directory.
gfuzz_common.remove(output_dir)
os.makedirs(output_dir, exist_ok=True)
tmpcomp = os.path.join(output_dir, 'tmp.comp')
tmpjson = os.path.join(output_dir, 'tmp.json')
log_file = os.path.join(output_dir, runspv.LOGFILE_NAME)
ssbo_json_file = os.path.join(output_dir, 'ssbo.json')
# Output files from running the app.
status_file = os.path.join(output_dir, 'STATUS')
gfuzz_common.write_to_file(comp_job.computeSource, tmpcomp)
gfuzz_common.write_to_file(comp_job.computeInfo, tmpjson)
res = tt.ImageJobResult()
res.log = '#### Start compute shader\n\n'
assert not args.legacy_worker
# Set runspv logger. Use try-finally to clean up.
with gfuzz_common.open_helper(log_file, 'w') as f:
try:
runspv.log_to_file = f
runspv.run_compute_amber(
comp_original=tmpcomp,
json_file=tmpjson,
output_dir=output_dir,
force=args.force,
is_android=(args.target == 'android'),
skip_render=comp_job.skipRender,
spirv_opt_args=spirv_opt_args
)
except Exception as ex:
runspv.log('Exception: ' + str(ex))
runspv.log('Removing STATUS file.')
gfuzz_common.remove(status_file)
runspv.log('Continuing.')
finally:
runspv.log_to_file = None
if os.path.isfile(log_file):
with gfuzz_common.open_helper(log_file, 'r') as f:
res.log += f.read()
if os.path.isfile(status_file):
with gfuzz_common.open_helper(status_file, 'r') as f:
status = f.read().rstrip()
if status == 'SUCCESS':
res.status = tt.JobStatus.SUCCESS
assert (os.path.isfile(ssbo_json_file))
with gfuzz_common.open_helper(ssbo_json_file, 'r') as f:
res.computeOutputs = f.read()
elif status == 'CRASH':
res.status = tt.JobStatus.CRASH
elif status == 'TIMEOUT':
res.status = tt.JobStatus.TIMEOUT
else:
res.log += '\nUnknown status value: ' + status + '\n'
res.status = tt.JobStatus.UNEXPECTED_ERROR
else:
# Not even a status file?
res.log += '\nNo STATUS file\n'
res.status = tt.JobStatus.UNEXPECTED_ERROR
return res
def do_image_job(
args,
image_job,
spirv_opt_args: Optional[List[str]],
work_dir: str
) -> tt.ImageJobResult:
# Output directory is based on the name of job.
output_dir = os.path.join(work_dir, image_job.name)
# Delete and create output directory.
gfuzz_common.remove(output_dir)
os.makedirs(output_dir, exist_ok=True)
name = image_job.name
if name.endswith('.frag'):
name = gfuzz_common.remove_end(name, '.frag')
# TODO(324): the worker currently assumes that no vertex shader is present in the image job.
vert_file = prepare_vert_file(output_dir) if args.legacy_worker else None
frag_file = os.path.join(output_dir, name + '.frag')
json_file = os.path.join(output_dir, name + '.json')
png_file = os.path.join(output_dir, 'image_0.png')
log_file = os.path.join(output_dir, runspv.LOGFILE_NAME)
status_file = os.path.join(output_dir, 'STATUS')
nondet_0 = os.path.join(output_dir, 'nondet0.png')
nondet_1 = os.path.join(output_dir, 'nondet1.png')
res = tt.ImageJobResult()
skip_render = image_job.skipRender
# Set nice defaults to fields we will not update anyway
res.passSanityCheck = True
res.log = 'Start: ' + name + '\n'
gfuzz_common.write_to_file(image_job.fragmentSource, frag_file)
gfuzz_common.write_to_file(image_job.uniformsInfo, json_file)
# Set runspv logger. Use try-finally to clean up.
with gfuzz_common.open_helper(log_file, 'w') as f:
try:
runspv.log_to_file = f
resolved_spirvopt_args = resolve_spirvopt_args(spirv_opt_args)
if args.legacy_worker:
if args.target == 'host':
runspv.run_image_host_legacy(
vert_original=vert_file,
frag_original=frag_file,
json_file=json_file,
output_dir=output_dir,
skip_render=skip_render,
spirv_opt_args=resolved_spirvopt_args,
)
else:
assert args.target == 'android'
runspv.run_image_android_legacy(
vert_original=vert_file,
frag_original=frag_file,
json_file=json_file,
output_dir=output_dir,
force=args.force,
skip_render=skip_render,
spirv_opt_args=resolved_spirvopt_args,
)
else:
runspv.run_image_amber(
vert_original=vert_file,
frag_original=frag_file,
json_file=json_file,
output_dir=output_dir,
force=args.force,
is_android=(args.target == 'android'),
skip_render=skip_render,
spirv_opt_args=resolved_spirvopt_args
)
except Exception as ex:
runspv.log('Exception: ' + str(ex))
runspv.log('Removing STATUS file.')
gfuzz_common.remove(status_file)
runspv.log('Continuing.')
finally:
runspv.log_to_file = None
if os.path.isfile(log_file):
with gfuzz_common.open_helper(log_file, 'r') as f:
res.log += f.read()
if os.path.isfile(png_file):
with gfuzz_common.open_bin_helper(png_file, 'rb') as f:
res.PNG = f.read()
if os.path.isfile(status_file):
with gfuzz_common.open_helper(status_file, 'r') as f:
status = f.read().rstrip()
if status == 'SUCCESS':
res.status = tt.JobStatus.SUCCESS
elif status == 'CRASH':
res.status = tt.JobStatus.CRASH
elif status == 'TIMEOUT':
res.status = tt.JobStatus.TIMEOUT
elif status == 'SANITY_ERROR':
res.status = tt.JobStatus.SANITY_ERROR
elif status == 'UNEXPECTED_ERROR':
res.status = tt.JobStatus.UNEXPECTED_ERROR
elif status == 'NONDET':
res.status = tt.JobStatus.NONDET
with gfuzz_common.open_bin_helper(nondet_0, 'rb') as f:
res.PNG = f.read()
with gfuzz_common.open_bin_helper(nondet_1, 'rb') as f:
res.PNG2 = f.read()
else:
res.log += '\nUnknown status value: ' + status + '\n'
res.status = tt.JobStatus.UNEXPECTED_ERROR
else:
# Not even a status file?
res.log += '\nNo STATUS file\n'
res.status = tt.JobStatus.UNEXPECTED_ERROR
return res
def get_ssbo(result_json_filename: str) -> List:
with gfuzz_common.open_helper(result_json_filename, 'r') as f:
parsed = json.load(f)
if not parsed or 'outputs' not in parsed or 'ssbo' not in parsed['outputs']:
raise ValueError('No SSBO data found')
return parsed['outputs']['ssbo']