ref: 5cfedb745a94e855247811f3e65639e3a6be09be
dir: /tools/set_analyzer_env.sh/
## Copyright (c) 2018 The WebM project authors. All Rights Reserved. ## ## Use of this source code is governed by a BSD-style license ## that can be found in the LICENSE file in the root of the source ## tree. An additional intellectual property rights grant can be found ## in the file PATENTS. All contributing project authors may ## be found in the AUTHORS file in the root of the source tree. ## ## Sourcing this file sets environment variables to simplify setting up ## sanitizer builds and testing. sanitizer="${1}" case "${sanitizer}" in address) ;; cfi) ;; integer) ;; memory) ;; thread) ;; undefined) ;; clear) echo "Clearing environment:" set -x unset CC CXX LD AR unset CFLAGS CXXFLAGS LDFLAGS unset ASAN_OPTIONS MSAN_OPTIONS TSAN_OPTIONS UBSAN_OPTIONS set +x return ;; *) echo "Usage: source set_analyzer_env.sh [<sanitizer>|clear]" echo " Supported sanitizers:" echo " address cfi integer memory thread undefined" return 1 ;; esac if [ ! $(which clang) ]; then # TODO(johannkoenig): Support gcc analyzers. echo "ERROR: 'clang' must be in your PATH" return 1 fi # Warnings. if [ "${sanitizer}" = "undefined" -o "${sanitizer}" = "integer" ]; then echo "WARNING: When building the ${sanitizer} sanitizer for 32 bit targets" echo "you must run:" echo "export LDFLAGS=\"\${LDFLAGS} --rtlib=compiler-rt -lgcc_s\"" echo "See http://llvm.org/bugs/show_bug.cgi?id=17693 for details." fi if [ "${sanitizer}" = "undefined" ]; then major_version=$(clang --version | head -n 1 \ | grep -o -E "[[:digit:]]\.[[:digit:]]\.[[:digit:]]" | cut -f1 -d.) if [ ${major_version} -eq 5 ]; then echo "WARNING: clang v5 has a problem with vp9 x86_64 high bit depth" echo "configurations. It can take ~40 minutes to compile" echo "vpx_dsp/x86/fwd_txfm_sse2.c" echo "clang v4 did not have this issue." fi fi echo "It is recommended to configure with '--enable-debug' to improve stack" echo "traces. On mac builds, run 'dysmutil' on the output binaries (vpxenc," echo "test_libvpx, etc) to link the stack traces to source code lines." # Build configuration. cflags="-fsanitize=${sanitizer}" ldflags="-fsanitize=${sanitizer}" # http://code.google.com/p/webm/issues/detail?id=570 cflags="${cflags} -fno-strict-aliasing" # Useful backtraces. cflags="${cflags} -fno-omit-frame-pointer" # Exact backtraces. cflags="${cflags} -fno-optimize-sibling-calls" if [ "${sanitizer}" = "cfi" ]; then # https://clang.llvm.org/docs/ControlFlowIntegrity.html cflags="${cflags} -fno-sanitize-trap=cfi -flto -fvisibility=hidden" ldflags="${ldflags} -fno-sanitize-trap=cfi -flto -fuse-ld=gold" export AR="llvm-ar" fi # TODO(http://crbug.com/webm/1615): -fsanitize=implicit-integer-truncation # causes conversion warnings in many of the x86 intrinsics and elsewhere. if [ "${sanitizer}" = "integer" ]; then major_version=$(clang --version | head -n 1 \ | grep -o -E "[[:digit:]]\.[[:digit:]]\.[[:digit:]]" | cut -f1 -d.) if [ ${major_version} -ge 7 ]; then cflags="${cflags} -fno-sanitize=implicit-integer-truncation" ldflags="${ldflags} -fno-sanitize=implicit-integer-truncation" fi fi set -x export CC="clang" export CXX="clang++" export LD="clang++" export CFLAGS="${cflags}" export CXXFLAGS="${cflags}" export LDFLAGS="${ldflags}" set +x # Execution configuration. sanitizer_options="" sanitizer_options="${sanitizer_options}:handle_segv=1" sanitizer_options="${sanitizer_options}:handle_abort=1" sanitizer_options="${sanitizer_options}:handle_sigfpe=1" sanitizer_options="${sanitizer_options}:fast_unwind_on_fatal=1" sanitizer_options="${sanitizer_options}:allocator_may_return_null=1" case "${sanitizer}" in address) sanitizer_options="${sanitizer_options}:detect_stack_use_after_return=1" sanitizer_options="${sanitizer_options}:max_uar_stack_size_log=17" set -x export ASAN_OPTIONS="${sanitizer_options}" set +x ;; cfi) # No environment settings ;; memory) set -x export MSAN_OPTIONS="${sanitizer_options}" set +x ;; thread) # The thread sanitizer uses an entirely independent set of options. set -x export TSAN_OPTIONS="halt_on_error=1" set +x ;; undefined|integer) sanitizer_options="${sanitizer_options}:print_stacktrace=1" set -x export UBSAN_OPTIONS="${sanitizer_options}" set +x ;; esac