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# Copyright 2020 The Pigweed Authors
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may not
# use this file except in compliance with the License. You may obtain a copy of
# the License at
#
# https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations under
# the License.
import("//build_overrides/pigweed.gni")
import("//build_overrides/pigweed_environment.gni")
# See https://github.com/google/sanitizers
config("sanitize_address") {
cflags = [ "-fsanitize=address" ]
ldflags = cflags
}
config("sanitize_memory") {
cflags = [
"-fsanitize=memory",
# Do not optimizes tail recursive calls to get better call stack.
"-fno-optimize-sibling-calls",
# Enable check after destruction detection.
"-fsanitize-memory-use-after-dtor",
]
ldflags = cflags
}
config("sanitize_undefined") {
cflags = [
"-fsanitize=undefined",
# Store the stack frame pointer in a register to get proper debug
# information.
"-fno-omit-frame-pointer",
# Exit the program on check failure. (The default is to continue execution,
# which prevents test frameworks from realizing the test has failed.)
"-fno-sanitize-recover=undefined",
]
ldflags = cflags
}
# UBsan configuration that enables additional checks. These checks are
# heuristic and may not correspond to undefined behavior.
config("sanitize_undefined_heuristic") {
sanitizers = [
# Base checks for undefined behaviour.
"undefined",
# Checks for undefined or suspicious integer behavior.
"integer",
# Checks for floating point division by zero.
"float-divide-by-zero",
# Checks for suspicious behavior of implicit conversions.
"implicit-conversion",
# Checks for null as function arg, lvalue and return type.
"nullability",
]
cflags = [
"-fsanitize=" + string_join(",", sanitizers),
# Store the stack frame pointer in a register to get proper debug
# information.
"-fno-omit-frame-pointer",
]
ldflags = cflags
}
config("sanitize_thread") {
cflags = [ "-fsanitize=thread" ]
ldflags = cflags
}
config("sanitize_coverage") {
cflags = [
"-fprofile-instr-generate",
"-fcoverage-mapping",
]
ldflags = cflags
}
# Locate XCode's sysroot for Clang.
config("xcode_sysroot") {
if (current_os == "mac") {
_xcode_sysroot = exec_script("$dir_pw_build/py/pw_build/exec.py",
[
"--",
"/usr/bin/xcrun",
"--show-sdk-path",
],
"trim string")
cflags = [ "--sysroot=$_xcode_sysroot" ]
ldflags = cflags
}
}
config("linux_sysroot") {
if (current_os == "linux") {
cflags = [ "--sysroot=" +
rebase_path(pw_env_setup_CIPD_PIGWEED, root_build_dir) +
"/clang_sysroot/" ]
ldflags = cflags
}
}
# The CIPD provided Clang/LLVM toolchain must link against the matched
# libc++ which is also from CIPD. However, by default, Clang on Mac (but
# not on Linux) will fall back to the system libc++, which is
# incompatible due to an ABI change.
#
# Pull the appropriate paths from our Pigweed env setup.
config("no_system_libcpp") {
if (current_os == "mac") {
install_dir = pw_env_setup_CIPD_PIGWEED
assert(install_dir != "",
"You forgot to activate the Pigweed environment; " +
"did you source pw_env_setup/setup.sh?")
ldflags = [
# Force dropping the system libc++
"-nostdlib++",
# Use the libc++ from CIPD.
rebase_path(pw_env_setup_CIPD_PIGWEED + "/lib/libc++.a", root_build_dir),
]
}
}
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