test/fuzzing/meson.build

tests = [
  'hb-shape-fuzzer.cc',
  'hb-subset-fuzzer.cc',
  'hb-raster-fuzzer.cc',
  'hb-vector-fuzzer.cc',
  'hb-gpu-fuzzer.cc',
  'hb-repacker-fuzzer.cc',
]

depend_tests = [
  'hb-depend-closure-parity.cc',
  'hb-depend-fuzzer.cc',
]

# Build the binaries
foreach file_name : tests
  test_name = file_name.split('.')[0]

  sources = [file_name]
  fuzzer_ldflags = []
  extra_cpp_args = []

  if get_option('fuzzer_ldflags') == ''
    sources += 'main.cc'
  else
    fuzzer_ldflags += get_option('fuzzer_ldflags').split()
    extra_cpp_args += '-DHB_IS_IN_FUZZER'
  endif

  if get_option('experimental_api')
    extra_cpp_args += '-DHB_EXPERIMENTAL_API'
  endif

  if (test_name.contains('subset') or test_name.contains('repacker')) and get_option('subset').disabled()
    continue
  endif

  if test_name.contains('raster') and get_option('raster').disabled()
    continue
  endif

  if test_name.contains('vector') and get_option('vector').disabled()
    continue
  endif

  if test_name.contains('gpu') and get_option('gpu').disabled()
    continue
  endif

  link_with_libs = [libharfbuzz]
  if test_name.contains('subset') or test_name.contains('repacker')
    link_with_libs += [libharfbuzz_subset]
  endif
  if test_name.contains('raster')
    link_with_libs += [libharfbuzz_raster]
  endif
  if test_name.contains('vector')
    link_with_libs += [libharfbuzz_vector]
  endif
  if test_name.contains('gpu')
    link_with_libs += [libharfbuzz_gpu]
  endif


  exe = executable(test_name, sources,
    cpp_args: cpp_args + extra_cpp_args,
    include_directories: [incconfig, incsrc],
    dependencies: [],
    link_args: fuzzer_ldflags,
    link_with: link_with_libs,
    install: false,
  )
  set_variable('@0@_exe'.format(test_name.underscorify()), exe)
endforeach

# Build depend-related fuzzers only if depend_api is enabled
if conf.get('HB_EXPERIMENTAL_API', 0) == 1
  foreach file_name : depend_tests
    test_name = file_name.split('.')[0]

    sources = [file_name]
    fuzzer_ldflags = []
    extra_cpp_args = []

    if get_option('fuzzer_ldflags') == ''
      # hb-depend-closure-parity has custom main that sets font path global
      if test_name == 'hb-depend-closure-parity'
        sources += 'hb-depend-closure-parity-main.cc'
      else
        sources += 'main.cc'
      endif
    else
      fuzzer_ldflags += get_option('fuzzer_ldflags').split()
      extra_cpp_args += '-DHB_IS_IN_FUZZER'
    endif

    if get_option('experimental_api')
      extra_cpp_args += '-DHB_EXPERIMENTAL_API'
    endif

    # hb-depend-closure-parity needs glib for option parsing
    test_deps = []
    if test_name == 'hb-depend-closure-parity'
      if conf.get('HAVE_GLIB', 0) == 0
        continue
      endif
      test_deps = [glib_dep]
    endif

    exe = executable(test_name, sources,
      cpp_args: cpp_args + extra_cpp_args,
      include_directories: [incconfig, incsrc],
      dependencies: test_deps,
      link_args: fuzzer_ldflags,
      link_with: [libharfbuzz, libharfbuzz_subset],
      install: false,
    )
    set_variable('@0@_exe'.format(test_name.underscorify()), exe)
  endforeach
endif

glob_cmd = find_program('glob.py', required: true)

fonts_glob = run_command(glob_cmd, meson.current_source_dir() / 'fonts', check:true).stdout().strip().split('\n')
subset_fonts_glob = run_command(glob_cmd, meson.current_source_dir() / '..' / 'subset' / 'data' / 'fonts', check:true).stdout().strip().split('\n')
graphs_glob = run_command(glob_cmd, meson.current_source_dir() / 'graphs', check:true).stdout().strip().split('\n')

depend_closure_parity_fonts_glob = []
foreach font : subset_fonts_glob
  # These fonts currently spend tens of seconds or more building the
  # contextual GSUB dependency graph before the parity tests start.
  if not font.contains('NotoNastaliqUrdu-Bold.ttf') and not font.contains('NotoNastaliqUrdu-Regular.ttf')
    depend_closure_parity_fonts_glob += [font]
  endif
endforeach

# Chunk the glob lists to avoid command line length limits, and for parallelization
chunk_size = 64
foreach glob_name : ['fonts_glob', 'subset_fonts_glob', 'depend_closure_parity_fonts_glob', 'graphs_glob']
  glob = get_variable(glob_name)
  chunks = []
  chunk = []
  foreach item : glob
    if chunk.length() >= chunk_size
      chunks += [chunk]
      chunk = []
    endif
    chunk += [item]
  endforeach
  if chunk.length() > 0
    chunks += [chunk]
  endif
  set_variable('@0@_chunks'.format(glob_name), chunks)
endforeach

# Run fuzzers

i = 0
foreach chunk : fonts_glob_chunks
  test('shape-fuzzer-chunk-@0@'.format(i),
    hb_shape_fuzzer_exe,
    args: chunk,
    workdir: meson.current_build_dir() / '..' / '..',
    protocol: 'tap',
    suite: ['fuzzing'],
  )
  i += 1
endforeach

if not get_option('raster').disabled()
  i = 0
  foreach chunk : fonts_glob_chunks
    test('raster-fuzzer-chunk-@0@'.format(i),
      hb_raster_fuzzer_exe,
      args: chunk,
      workdir: meson.current_build_dir() / '..' / '..',
      protocol: 'tap',
      suite: ['fuzzing'],
    )
    i += 1
  endforeach
endif

if not get_option('vector').disabled()
  i = 0
  foreach chunk : fonts_glob_chunks
    test('vector-fuzzer-chunk-@0@'.format(i),
      hb_vector_fuzzer_exe,
      args: chunk,
      workdir: meson.current_build_dir() / '..' / '..',
      protocol: 'tap',
      suite: ['fuzzing'],
    )
    i += 1
  endforeach
endif

if not get_option('gpu').disabled()
  i = 0
  foreach chunk : fonts_glob_chunks
    test('gpu-fuzzer-chunk-@0@'.format(i),
      hb_gpu_fuzzer_exe,
      args: chunk,
      workdir: meson.current_build_dir() / '..' / '..',
      protocol: 'tap',
      suite: ['fuzzing'],
    )
    i += 1
  endforeach
endif

if not get_option('subset').disabled()
  i = 0
  foreach chunk : fonts_glob_chunks + subset_fonts_glob_chunks
    test('subset-fuzzer-chunk-@0@'.format(i),
      hb_subset_fuzzer_exe,
      args: chunk,
      workdir: meson.current_build_dir() / '..' / '..',
      protocol: 'tap',
      suite: ['fuzzing'],
    )
    i += 1
  endforeach
endif

if not get_option('subset').disabled()
  i = 0
  foreach chunk : graphs_glob_chunks
    test('repacker-fuzzer-chunk-@0@'.format(i),
      hb_repacker_fuzzer_exe,
      args: chunk,
      workdir: meson.current_build_dir() / '..' / '..',
      protocol: 'tap',
      suite: ['fuzzing'],
    )
    i += 1
  endforeach
endif

if conf.get('HB_EXPERIMENTAL_API', 0) == 1
  if conf.get('HAVE_GLIB', 0) == 1
    i = 0
    foreach chunk : depend_closure_parity_fonts_glob_chunks
      test('depend-closure-parity-chunk-@0@'.format(i),
        hb_depend_closure_parity_exe,
        args: ['-s', '42', '-n', '16'] + chunk,
        workdir: meson.current_build_dir() / '..' / '..',
        protocol: 'tap',
        suite: ['fuzzing'],
      )
      i += 1
    endforeach
  endif

  i = 0
  foreach chunk : fonts_glob_chunks
    test('depend-fuzzer-chunk-@0@'.format(i),
      hb_depend_fuzzer_exe,
      args: chunk,
      workdir: meson.current_build_dir() / '..' / '..',
      protocol: 'tap',
      suite: ['fuzzing'],
    )
    i += 1
  endforeach
endif