# Copyright 2016 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

group("afl") {
  deps = [
    ":afl-cmin",
    ":afl-fuzz",
    ":afl-showmap",
    ":afl-tmin",
    ":afl_docs",
    ":afl_runtime",
  ]
}

source_set("afl_runtime") {
  # AFL needs this flag to be built with -Werror. This is because it uses u8*
  # and char* types interchangeably in its source code. The AFL Makefiles use
  # this flag.
  cflags = [ "-Wno-pointer-sign" ]

  configs -= [
    # These functions should not be compiled with sanitizers since they
    # are used by the sanitizers.
    "//build/config/sanitizers:default_sanitizer_flags",

    # Every function in this library should have "default" visibility.
    # Thus we turn off flags which make visibility "hidden" for functions
    # that do not specify visibility.
    # The functions in this library will not conflict with others elsewhere
    # because they begin with a double underscore and/or are static.
    "//build/config/gcc:symbol_visibility_hidden",
  ]

  sources = [
    "src/llvm_mode/afl-llvm-rt.o.c",
  ]
}

afl_headers = [
  "src/alloc-inl.h",
  "src/config.h",
  "src/debug.h",
  "src/types.h",
  "src/hash.h",
]

config("afl-tool") {
  cflags = [
    # Include flags from afl's Makefile.
    "-O3",
    "-funroll-loops",
    "-D_FORTIFY_SOURCE=2",

    # These flags are necessary to build with -Werror.
    "-Wno-sign-compare",
    "-Wno-pointer-sign",

    # afl_docs copies docs/ to this location.
    "-DDOC_PATH=\"$root_build_dir/afl/docs/\"",

    # This flag is needed for compilation but is only used for QEMU mode which
    # we do not use. Therefore its value is unimportant.
    "-DBIN_PATH=\"$root_build_dir\"",
  ]
}

copy("afl-cmin") {
  # afl-cmin is a bash script used to minimize the corpus, therefore we can just
  # copy it over.
  sources = [
    "src/afl-cmin",
  ]
  outputs = [
    "$root_build_dir/{{source_file_part}}",
  ]
  deps = [
    ":afl-showmap",
  ]
}

copy("afl_docs") {
  # Copy the docs folder. This is so that we can use a real value for for
  # -DDOC_PATH when compiling.
  sources = [
    "src/docs",
  ]
  outputs = [
    "$root_build_dir/afl/{{source_file_part}}",
  ]
}

executable("afl-fuzz") {
  # Used to fuzz programs.
  configs -= [ "//build/config/sanitizers:default_sanitizer_flags" ]
  configs += [ ":afl-tool" ]

  no_default_deps = true

  sources = [
    "src/afl-fuzz.c",
  ]
  sources += afl_headers
}

executable("afl-tmin") {
  configs -= [ "//build/config/sanitizers:default_sanitizer_flags" ]
  configs += [ ":afl-tool" ]

  no_default_deps = true

  sources = [
    "src/afl-tmin.c",
  ]
  sources += afl_headers
}

executable("afl-showmap") {
  configs -= [ "//build/config/sanitizers:default_sanitizer_flags" ]
  configs += [ ":afl-tool" ]

  no_default_deps = true

  sources = [
    "src/afl-showmap.c",
  ]
  sources += afl_headers
}