1# Copyright (C) 2017 The Android Open Source Project
2#
3# Licensed under the Apache License, Version 2.0 (the "License");
4# you may not use this file except in compliance with the License.
5# You may obtain a copy of the License at
6#
7#      http://www.apache.org/licenses/LICENSE-2.0
8#
9# Unless required by applicable law or agreed to in writing, software
10# distributed under the License is distributed on an "AS IS" BASIS,
11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12# See the License for the specific language governing permissions and
13# limitations under the License.
14
15import("//gn/standalone/sanitizers/sanitizers.gni")
16
17# Link dependencies for sanitizers for executables.
18group("deps") {
19  visibility = [ "*" ]
20  if (using_sanitizer) {
21    public_configs = [ ":sanitizers_ldflags" ]
22    if (is_android && sanitizer_lib != "" && !sanitizer_lib_dir_is_static) {
23      deps = [
24        ":copy_sanitizer_lib",
25      ]
26    }
27  }
28}
29
30if (is_android && sanitizer_lib != "" && !sanitizer_lib_dir_is_static) {
31  copy("copy_sanitizer_lib") {
32    sources = [
33      "${sanitizer_lib_dir}/lib${sanitizer_lib}.so",
34    ]
35    outputs = [
36      "${root_out_dir}/sanitizer_libs/lib${sanitizer_lib}.so",
37    ]
38  }
39}
40
41config("sanitizers_cflags") {
42  cflags = []
43  defines = []
44  if (using_sanitizer) {
45    blacklist_path_ = rebase_path("blacklist.txt", root_build_dir)
46    cflags += [
47      "-fno-omit-frame-pointer",
48      "-fsanitize-blacklist=$blacklist_path_",
49    ]
50  }
51
52  if (is_asan) {
53    cflags += [ "-fsanitize=address" ]
54    defines += [ "ADDRESS_SANITIZER" ]
55  }
56  if (is_lsan) {
57    cflags += [ "-fsanitize=leak" ]
58    defines += [ "LEAK_SANITIZER" ]
59  }
60  if (is_tsan) {
61    cflags += [ "-fsanitize=thread" ]
62    defines += [
63      "THREAD_SANITIZER",
64      "DYNAMIC_ANNOTATIONS_EXTERNAL_IMPL=1",
65    ]
66  }
67  if (is_msan) {
68    cflags += [
69      "-fsanitize=memory",
70      "-fsanitize-memory-track-origins=2",
71    ]
72    defines += [ "MEMORY_SANITIZER" ]
73  }
74  if (is_ubsan) {
75    cflags += [
76      "-fsanitize=bounds",
77      "-fsanitize=float-divide-by-zero",
78      "-fsanitize=integer-divide-by-zero",
79      "-fsanitize=null",
80      "-fsanitize=object-size",
81      "-fsanitize=return",
82      "-fsanitize=returns-nonnull-attribute",
83      "-fsanitize=shift-exponent",
84      "-fsanitize=signed-integer-overflow",
85      "-fsanitize=unreachable",
86      "-fsanitize=vla-bound",
87    ]
88    defines += [ "UNDEFINED_SANITIZER" ]
89  }
90  if (is_fuzzer) {
91    # FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION is also defined by oss-fuzz,
92    # so using the same name.
93    defines += [ "FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION" ]
94    cflags += [ "-fsanitize=fuzzer-no-link" ]
95    if (is_asan) {
96      cflags += [
97        "-mllvm",
98        "-asan-use-private-alias",
99      ]
100    }
101  }
102}
103
104config("sanitizer_options_link_helper") {
105  if (is_mac) {
106    ldflags = [ "-Wl,-U,_sanitizer_options_link_helper" ]
107  }
108}
109
110config("sanitizers_ldflags") {
111  visibility = [ ":deps" ]
112  ldflags = []
113  if (is_asan) {
114    ldflags += [ "-fsanitize=address" ]
115  }
116  if (is_lsan) {
117    # This is not a copy/paste mistake. The LSan runtime library has
118    # moved into asan. So in order to make LSan work one has to build
119    # .cc files with -fsanitize=leak but link with -fsanitize=address.
120    ldflags += [ "-fsanitize=address" ]
121  }
122  if (is_tsan) {
123    ldflags += [ "-fsanitize=thread" ]
124  }
125  if (is_msan) {
126    ldflags += [ "-fsanitize=memory" ]
127  }
128  if (is_ubsan) {
129    ldflags += [ "-fsanitize=undefined" ]
130  }
131  configs = [ ":sanitizer_options_link_helper" ]
132}
133