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[llvm-locstats][NFC] Support OOP concept
Making these changes, the code becomes more robust and easier for adding the new features. -Introduce the LocationStats class representing the statistics -Add the pretty_print() method in the LocationStats class -Add additional '-' for the program options -Add the verify_program_inputs() function -Add the parse_locstats() function -Rename 'results' => 'opts' -Add more comments Differential Revision: https://reviews.llvm.org/D71868
This commit is contained in:
Djordje Todorovic
parent
cffbac9542
commit
ada36eafbb
@ -25,18 +25,18 @@ covered.
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OPTIONS
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-------
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.. option:: -only-variables
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.. option:: --only-variables
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Calculate the location statistics only for local variables.
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calculate the location statistics only for local variables
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.. option:: -only-formal-parameters
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.. option:: --only-formal-parameters
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Calculate the location statistics only for formal parameters.
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calculate the location statistics only for formal parameters
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.. option:: -ignore-debug-entry-values
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.. option:: --ignore-debug-entry-values
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Ignore the location statistics on locations containing the
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debug entry values DWARF operation.
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ignore the location statistics on locations containing the
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debug entry values DWARF operation
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EXIT STATUS
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-----------
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@ -13,6 +13,59 @@ from json import loads
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from math import ceil
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from subprocess import Popen, PIPE
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# Holds the debug location statistics.
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class LocationStats:
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def __init__(self, file_name, variables_total, variables_total_locstats,
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variables_with_loc, variables_scope_bytes_covered, variables_scope_bytes,
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variables_coverage_map):
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self.file_name = file_name
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self.variables_total = variables_total
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self.variables_total_locstats = variables_total_locstats
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self.variables_with_loc = variables_with_loc
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self.scope_bytes_covered = variables_scope_bytes_covered
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self.scope_bytes = variables_scope_bytes
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self.variables_coverage_map = variables_coverage_map
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# Pretty print the debug location buckets.
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def pretty_print(self):
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if self.scope_bytes == 0:
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print ('No scope bytes found.')
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return -1
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pc_ranges_covered = int(ceil(self.scope_bytes_covered * 100.0) \
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/ self.scope_bytes)
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variables_coverage_per_map = {}
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for cov_bucket in coverage_buckets():
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variables_coverage_per_map[cov_bucket] = \
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int(ceil(self.variables_coverage_map[cov_bucket] * 100.0) \
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/ self.variables_total_locstats)
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print (' =================================================')
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print (' Debug Location Statistics ')
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print (' =================================================')
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print (' cov% samples percentage(~) ')
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print (' -------------------------------------------------')
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for cov_bucket in coverage_buckets():
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print (' {0:10} {1:8d} {2:3d}%'. \
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format(cov_bucket, self.variables_coverage_map[cov_bucket], \
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variables_coverage_per_map[cov_bucket]))
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print (' =================================================')
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print (' -the number of debug variables processed: ' \
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+ str(self.variables_total_locstats))
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print (' -PC ranges covered: ' + str(pc_ranges_covered) + '%')
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# Only if we are processing all the variables output the total
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# availability.
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if self.variables_total and self.variables_with_loc:
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total_availability = int(ceil(self.variables_with_loc * 100.0) \
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/ self.variables_total)
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print (' -------------------------------------------------')
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print (' -total availability: ' + str(total_availability) + '%')
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print (' =================================================')
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return 0
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# Define the location buckets.
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def coverage_buckets():
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yield '0%'
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yield '(0%,10%)'
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@ -20,84 +73,9 @@ def coverage_buckets():
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yield '[{0}%,{1}%)'.format(start, start + 10)
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yield '100%'
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def locstats_output(
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variables_total,
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variables_total_locstats,
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variables_with_loc,
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scope_bytes_covered,
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scope_bytes,
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variables_coverage_map
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):
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if scope_bytes == 0:
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print ('No scope bytes found.')
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sys.exit(0)
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pc_ranges_covered = int(ceil(scope_bytes_covered * 100.0)
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/ scope_bytes)
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variables_coverage_per_map = {}
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for cov_bucket in coverage_buckets():
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variables_coverage_per_map[cov_bucket] = \
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int(ceil(variables_coverage_map[cov_bucket] * 100.0) \
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/ variables_total_locstats)
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print (' =================================================')
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print (' Debug Location Statistics ')
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print (' =================================================')
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print (' cov% samples percentage(~) ')
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print (' -------------------------------------------------')
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for cov_bucket in coverage_buckets():
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print (' {0:10} {1:8d} {2:3d}%'. \
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format(cov_bucket, variables_coverage_map[cov_bucket], \
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variables_coverage_per_map[cov_bucket]))
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print (' =================================================')
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print (' -the number of debug variables processed: ' \
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+ str(variables_total_locstats))
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print (' -PC ranges covered: ' + str(pc_ranges_covered) + '%')
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# Only if we are processing all the variables output the total
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# availability.
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if variables_total and variables_with_loc:
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total_availability = int(ceil(variables_with_loc * 100.0) \
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/ variables_total)
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print (' -------------------------------------------------')
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print (' -total availability: ' + str(total_availability) + '%')
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print (' =================================================')
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def parse_program_args(parser):
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parser.add_argument('-only-variables', action='store_true',
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default=False,
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help='calculate the location statistics only for '
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'local variables'
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)
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parser.add_argument('-only-formal-parameters', action='store_true',
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default=False,
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help='calculate the location statistics only for '
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'formal parameters'
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)
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parser.add_argument('-ignore-debug-entry-values', action='store_true',
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default=False,
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help='ignore the location statistics on locations with '
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'entry values'
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)
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parser.add_argument('file_name', type=str, help='file to process')
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return parser.parse_args()
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def Main():
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parser = argparse.ArgumentParser()
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results = parse_program_args(parser)
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if len(sys.argv) < 2:
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print ('error: Too few arguments.')
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parser.print_help()
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sys.exit(1)
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if results.only_variables and results.only_formal_parameters:
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print ('error: Please use just one only* option.')
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parser.print_help()
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sys.exit(1)
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# Parse the JSON representing the debug statistics, and create a
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# LocationStats object.
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def parse_locstats(opts, binary):
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# These will be different due to different options enabled.
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variables_total = None
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variables_total_locstats = None
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@ -106,7 +84,6 @@ def Main():
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variables_scope_bytes = None
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variables_scope_bytes_entry_values = None
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variables_coverage_map = {}
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binary = results.file_name
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# Get the directory of the LLVM tools.
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llvm_dwarfdump_cmd = os.path.join(os.path.dirname(__file__), \
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@ -114,6 +91,7 @@ def Main():
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# The statistics llvm-dwarfdump option.
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llvm_dwarfdump_stats_opt = "--statistics"
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# Generate the stats with the llvm-dwarfdump.
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subproc = Popen([llvm_dwarfdump_cmd, llvm_dwarfdump_stats_opt, binary], \
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stdin=PIPE, stdout=PIPE, stderr=PIPE, \
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universal_newlines = True)
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@ -128,7 +106,7 @@ def Main():
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print ('error: No valid llvm-dwarfdump statistics found.')
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sys.exit(1)
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if results.only_variables:
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if opts.only_variables:
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# Read the JSON only for local variables.
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variables_total_locstats = \
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json_parsed['total vars procesed by location statistics']
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@ -136,7 +114,7 @@ def Main():
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json_parsed['vars scope bytes covered']
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variables_scope_bytes = \
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json_parsed['vars scope bytes total']
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if not results.ignore_debug_entry_values:
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if not opts.ignore_debug_entry_values:
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for cov_bucket in coverage_buckets():
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cov_category = "vars with {} of its scope covered".format(cov_bucket)
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variables_coverage_map[cov_bucket] = json_parsed[cov_category]
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@ -150,7 +128,7 @@ def Main():
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"vars (excluding the debug entry values) " \
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"with {} of its scope covered".format(cov_bucket)
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variables_coverage_map[cov_bucket] = json_parsed[cov_category]
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elif results.only_formal_parameters:
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elif opts.only_formal_parameters:
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# Read the JSON only for formal parameters.
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variables_total_locstats = \
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json_parsed['total params procesed by location statistics']
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@ -158,7 +136,7 @@ def Main():
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json_parsed['formal params scope bytes covered']
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variables_scope_bytes = \
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json_parsed['formal params scope bytes total']
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if not results.ignore_debug_entry_values:
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if not opts.ignore_debug_entry_values:
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for cov_bucket in coverage_buckets():
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cov_category = "params with {} of its scope covered".format(cov_bucket)
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variables_coverage_map[cov_bucket] = json_parsed[cov_category]
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@ -183,7 +161,7 @@ def Main():
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json_parsed['scope bytes covered']
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variables_scope_bytes = \
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json_parsed['scope bytes total']
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if not results.ignore_debug_entry_values:
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if not opts.ignore_debug_entry_values:
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for cov_bucket in coverage_buckets():
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cov_category = "variables with {} of its scope covered". \
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format(cov_bucket)
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@ -198,15 +176,51 @@ def Main():
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"with {} of its scope covered". format(cov_bucket)
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variables_coverage_map[cov_bucket] = json_parsed[cov_category]
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return LocationStats(binary, variables_total, variables_total_locstats,
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variables_with_loc, variables_scope_bytes_covered,
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variables_scope_bytes, variables_coverage_map)
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# Parse the program arguments.
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def parse_program_args(parser):
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parser.add_argument('--only-variables', action='store_true', default=False,
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help='calculate the location statistics only for local variables')
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parser.add_argument('--only-formal-parameters', action='store_true',
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default=False,
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help='calculate the location statistics only for formal parameters')
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parser.add_argument('--ignore-debug-entry-values', action='store_true',
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default=False,
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help='ignore the location statistics on locations with '
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'entry values')
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parser.add_argument('file_name', type=str, help='file to process')
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return parser.parse_args()
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# Verify that the program inputs meet the requirements.
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def verify_program_inputs(opts):
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if len(sys.argv) < 2:
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print ('error: Too few arguments.')
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return False
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if opts.only_variables and opts.only_formal_parameters:
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print ('error: Please use just one --only* option.')
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return False
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return True
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def Main():
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parser = argparse.ArgumentParser()
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opts = parse_program_args(parser)
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if not verify_program_inputs(opts):
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parser.print_help()
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sys.exit(1)
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binary = opts.file_name
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locstats = parse_locstats(opts, binary)
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# Pretty print collected info.
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locstats_output(
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variables_total,
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variables_total_locstats,
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variables_with_loc,
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variables_scope_bytes_covered,
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variables_scope_bytes,
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variables_coverage_map
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)
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if locstats.pretty_print() == -1:
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sys.exit(0)
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if __name__ == '__main__':
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Main()
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