utils/prepare-code-coverage-artifact.py

   1 #!/usr/bin/env python
   2
   3 from __future__ import print_function
   4
   5 '''Prepare a code coverage artifact.
   6
   7 - Collate raw profiles into one indexed profile.
   8 - Generate html reports for the given binaries.
   9
  10 Caution: The positional arguments to this script must be specified before any
  11 optional arguments, such as --restrict.
  12 '''
  13
  14 import argparse
  15 import glob
  16 import os
  17 import subprocess
  18 import sys
  19
  20 def merge_raw_profiles(host_llvm_profdata, profile_data_dir, preserve_profiles):
  21     print(':: Merging raw profiles...', end='')
  22     sys.stdout.flush()
  23     raw_profiles = glob.glob(os.path.join(profile_data_dir, '*.profraw'))
  24     manifest_path = os.path.join(profile_data_dir, 'profiles.manifest')
  25     profdata_path = os.path.join(profile_data_dir, 'Coverage.profdata')
  26     with open(manifest_path, 'w') as manifest:
  27         manifest.write('\n'.join(raw_profiles))
  28     subprocess.check_call([host_llvm_profdata, 'merge', '-sparse', '-f',
  29                            manifest_path, '-o', profdata_path])
  30     if not preserve_profiles:
  31         for raw_profile in raw_profiles:
  32             os.remove(raw_profile)
  33     os.remove(manifest_path)
  34     print('Done!')
  35     return profdata_path
  36
  37 def prepare_html_report(host_llvm_cov, profile, report_dir, binaries,
  38                         restricted_dirs):
  39     print(':: Preparing html report for {0}...'.format(binaries), end='')
  40     sys.stdout.flush()
  41     objects = []
  42     for i, binary in enumerate(binaries):
  43         if i == 0:
  44             objects.append(binary)
  45         else:
  46             objects.extend(('-object', binary))
  47     invocation = [host_llvm_cov, 'show'] + objects + ['-format', 'html',
  48                   '-instr-profile', profile, '-o', report_dir,
  49                   '-show-line-counts-or-regions', '-Xdemangler', 'c++filt',
  50                   '-Xdemangler', '-n'] + restricted_dirs
  51     subprocess.check_call(invocation)
  52     with open(os.path.join(report_dir, 'summary.txt'), 'wb') as Summary:
  53         subprocess.check_call([host_llvm_cov, 'report'] + objects +
  54                                ['-instr-profile', profile], stdout=Summary)
  55     print('Done!')
  56
  57 def prepare_html_reports(host_llvm_cov, profdata_path, report_dir, binaries,
  58                          unified_report, restricted_dirs):
  59     if unified_report:
  60         prepare_html_report(host_llvm_cov, profdata_path, report_dir, binaries,
  61                             restricted_dirs)
  62     else:
  63         for binary in binaries:
  64             binary_report_dir = os.path.join(report_dir,
  65                                              os.path.basename(binary))
  66             prepare_html_report(host_llvm_cov, profdata_path, binary_report_dir,
  67                                 [binary], restricted_dirs)
  68
  69 if __name__ == '__main__':
  70     parser = argparse.ArgumentParser(description=__doc__)
  71     parser.add_argument('host_llvm_profdata', help='Path to llvm-profdata')
  72     parser.add_argument('host_llvm_cov', help='Path to llvm-cov')
  73     parser.add_argument('profile_data_dir',
  74                        help='Path to the directory containing the raw profiles')
  75     parser.add_argument('report_dir',
  76                        help='Path to the output directory for html reports')
  77     parser.add_argument('binaries', metavar='B', type=str, nargs='*',
  78                        help='Path to an instrumented binary')
  79     parser.add_argument('--only-merge', action='store_true',
  80                         help='Only merge raw profiles together, skip report '
  81                              'generation')
  82     parser.add_argument('--preserve-profiles',
  83                        help='Do not delete raw profiles', action='store_true')
  84     parser.add_argument('--use-existing-profdata',
  85                        help='Specify an existing indexed profile to use')
  86     parser.add_argument('--unified-report', action='store_true',
  87                        help='Emit a unified report for all binaries')
  88     parser.add_argument('--restrict', metavar='R', type=str, nargs='*',
  89                        default=[],
  90                        help='Restrict the reporting to the given source paths'
  91                    ' (must be specified after all other positional arguments)')
  92     args = parser.parse_args()
  93
  94     if args.use_existing_profdata and args.only_merge:
  95         print('--use-existing-profdata and --only-merge are incompatible')
  96         exit(1)
  97
  98     if args.use_existing_profdata:
  99         profdata_path = args.use_existing_profdata
 100     else:
 101         profdata_path = merge_raw_profiles(args.host_llvm_profdata,
 102                                            args.profile_data_dir,
 103                                            args.preserve_profiles)
 104
 105     if not len(args.binaries):
 106         print('No binaries specified, no work to do!')
 107         exit(1)
 108
 109     if not args.only_merge:
 110         prepare_html_reports(args.host_llvm_cov, profdata_path, args.report_dir,
 111                             args.binaries, args.unified_report, args.restrict)