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-rwxr-xr-xlib/sanitizer_common/symbolizer/scripts/build_symbolizer.sh187
1 files changed, 187 insertions, 0 deletions
diff --git a/lib/sanitizer_common/symbolizer/scripts/build_symbolizer.sh b/lib/sanitizer_common/symbolizer/scripts/build_symbolizer.sh
new file mode 100755
index 0000000000000..07239eb505872
--- /dev/null
+++ b/lib/sanitizer_common/symbolizer/scripts/build_symbolizer.sh
@@ -0,0 +1,187 @@
+#!/bin/bash -eu
+#
+# Run as: CLANG=bin/clang ZLIB_SRC=src/zlib \
+# build_symbolizer.sh runtime_build/lib/clang/4.0.0/lib/linux/
+# zlib can be downloaded from from http://www.zlib.net.
+#
+# Script compiles self-contained object file with symbolization code and injects
+# it into the given set of runtime libraries. Script updates only libraries
+# which has unresolved __sanitizer_symbolize_* symbols and matches architecture.
+# Object file is be compiled from LLVM sources with dependencies like libc++ and
+# zlib. Then it internalizes symbols in the file, so that it can be linked
+# into arbitrary programs, avoiding conflicts with the program own symbols and
+# avoiding dependencies on any program symbols. The only acceptable dependencies
+# are libc and __sanitizer::internal_* from sanitizer runtime.
+#
+# Symbols exported by the object file will be used by Sanitizer runtime
+# libraries to symbolize code/data in-process.
+#
+# The script will modify the output directory which is given as the first
+# argument to the script.
+#
+# FIXME: We should really be using a simpler approach to building this object
+# file, and it should be available as a regular cmake rule. Conceptually, we
+# want to be doing "ld -r" followed by "objcopy -G" to create a relocatable
+# object file with only our entry points exposed. However, this does not work at
+# present, see PR30750.
+
+SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+SRC_DIR=$(readlink -f $SCRIPT_DIR/..)
+TARGE_DIR=$(readlink -f $1)
+
+LLVM_SRC="${LLVM_SRC:-$SCRIPT_DIR/../../../../../..}"
+LLVM_SRC=$(readlink -f $LLVM_SRC)
+
+if [[ ! -d "${LLVM_SRC}/projects/libcxxabi" ||
+ ! -d "${LLVM_SRC}/projects/libcxx" ]]; then
+ echo "Missing or incomplete LLVM_SRC"
+ exit 1
+fi
+
+if [[ "$ZLIB_SRC" == "" ||
+ ! -x "${ZLIB_SRC}/configure" ||
+ ! -f "${ZLIB_SRC}/zlib.h" ]]; then
+ echo "Missing or incomplete ZLIB_SRC"
+ exit 1
+fi
+ZLIB_SRC=$(readlink -f $ZLIB_SRC)
+
+J="${J:-50}"
+
+CLANG="${CLANG:-`which clang`}"
+CLANG_DIR=$(readlink -f $(dirname "$CLANG"))
+
+BUILD_DIR=$(readlink -f ./symbolizer)
+mkdir -p $BUILD_DIR
+cd $BUILD_DIR
+
+CC=$CLANG_DIR/clang
+CXX=$CLANG_DIR/clang++
+TBLGEN=$CLANG_DIR/llvm-tblgen
+LINK=$CLANG_DIR/llvm-link
+OPT=$CLANG_DIR/opt
+AR=$CLANG_DIR/llvm-ar
+
+for F in $CC $CXX $TBLGEN $LINK $OPT $AR; do
+ if [[ ! -x "$F" ]]; then
+ echo "Missing $F"
+ exit 1
+ fi
+done
+
+ZLIB_BUILD=${BUILD_DIR}/zlib
+LIBCXX_BUILD=${BUILD_DIR}/libcxx
+LLVM_BUILD=${BUILD_DIR}/llvm
+SYMBOLIZER_BUILD=${BUILD_DIR}/symbolizer
+
+FLAGS=${FLAGS:-}
+FLAGS="$FLAGS -fPIC -flto -Os -g0 -DNDEBUG"
+
+# Build zlib.
+mkdir -p ${ZLIB_BUILD}
+cd ${ZLIB_BUILD}
+cp -r ${ZLIB_SRC}/* .
+CC=$CC CFLAGS="$FLAGS" RANLIB=/bin/true ./configure --static
+make -j${J} libz.a
+
+# Build and install libcxxabi and libcxx.
+if [[ ! -d ${LIBCXX_BUILD} ]]; then
+ mkdir -p ${LIBCXX_BUILD}
+ cd ${LIBCXX_BUILD}
+ LIBCXX_FLAGS="${FLAGS} -Wno-macro-redefined -I${LLVM_SRC}/projects/libcxxabi/include"
+ cmake -GNinja \
+ -DCMAKE_BUILD_TYPE=Release \
+ -DCMAKE_C_COMPILER=$CC \
+ -DCMAKE_CXX_COMPILER=$CXX \
+ -DCMAKE_C_FLAGS_RELEASE="${LIBCXX_FLAGS}" \
+ -DCMAKE_CXX_FLAGS_RELEASE="${LIBCXX_FLAGS}" \
+ -DLIBCXXABI_ENABLE_ASSERTIONS=OFF \
+ -DLIBCXXABI_ENABLE_EXCEPTIONS=OFF \
+ -DLIBCXXABI_ENABLE_SHARED=OFF \
+ -DLIBCXXABI_ENABLE_THREADS=OFF \
+ -DLIBCXX_ENABLE_ASSERTIONS=OFF \
+ -DLIBCXX_ENABLE_EXCEPTIONS=OFF \
+ -DLIBCXX_ENABLE_RTTI=OFF \
+ -DLIBCXX_ENABLE_SHARED=OFF \
+ -DLIBCXX_ENABLE_THREADS=OFF \
+ $LLVM_SRC
+fi
+cd ${LIBCXX_BUILD}
+ninja cxx cxxabi
+
+FLAGS="${FLAGS} -fno-rtti -fno-exceptions"
+
+# Build LLVM.
+if [[ ! -d ${LLVM_BUILD} ]]; then
+ mkdir -p ${LLVM_BUILD}
+ cd ${LLVM_BUILD}
+ LLVM_FLAGS="${FLAGS} -I${ZLIB_BUILD} -I${LIBCXX_BUILD}/include/c++/v1"
+ cmake -GNinja \
+ -DCMAKE_BUILD_TYPE=Release \
+ -DCMAKE_C_COMPILER=$CC \
+ -DCMAKE_CXX_COMPILER=$CXX \
+ -DCMAKE_C_FLAGS_RELEASE="${LLVM_FLAGS}" \
+ -DCMAKE_CXX_FLAGS_RELEASE="${LLVM_FLAGS}" \
+ -DLLVM_TABLEGEN=$TBLGEN \
+ -DLLVM_ENABLE_ZLIB=ON \
+ -DLLVM_ENABLE_TERMINFO=OFF \
+ -DLLVM_ENABLE_THREADS=OFF \
+ $LLVM_SRC
+fi
+cd ${LLVM_BUILD}
+ninja LLVMSymbolize LLVMObject LLVMDebugInfoDWARF LLVMSupport LLVMDebugInfoPDB LLVMMC
+
+cd ${BUILD_DIR}
+rm -rf ${SYMBOLIZER_BUILD}
+mkdir ${SYMBOLIZER_BUILD}
+cd ${SYMBOLIZER_BUILD}
+
+for A in $LIBCXX_BUILD/lib/libc++.a \
+ $LIBCXX_BUILD/lib/libc++abi.a \
+ $LLVM_BUILD/lib/libLLVMSymbolize.a \
+ $LLVM_BUILD/lib/libLLVMObject.a \
+ $LLVM_BUILD/lib/libLLVMDebugInfoDWARF.a \
+ $LLVM_BUILD/lib/libLLVMSupport.a \
+ $LLVM_BUILD/lib/libLLVMDebugInfoPDB.a \
+ $LLVM_BUILD/lib/libLLVMMC.a \
+ $ZLIB_BUILD/libz.a ; do
+ for O in $($AR t $A); do
+ $AR x $A $O
+ mv -f $O "$(basename $A).$O" # Rename to avoid collisions between libs.
+ done
+done
+
+echo "Compiling..."
+SYMBOLIZER_FLAGS="$FLAGS -std=c++11 -I${LLVM_SRC}/include -I${LLVM_BUILD}/include -I${LIBCXX_BUILD}/include/c++/v1"
+$CXX $SYMBOLIZER_FLAGS ${SRC_DIR}/sanitizer_symbolize.cc ${SRC_DIR}/sanitizer_wrappers.cc -c
+
+SYMBOLIZER_API_LIST=__sanitizer_symbolize_code,__sanitizer_symbolize_data,__sanitizer_symbolize_flush,__sanitizer_symbolize_demangle
+
+# Merge all the object files together and copy the resulting library back.
+$LINK *.o -o all.bc
+echo "Optimizing..."
+$OPT -internalize -internalize-public-api-list=${SYMBOLIZER_API_LIST} all.bc -o opt.bc
+$CC $FLAGS -fno-lto -c opt.bc -o symbolizer.o
+
+echo "Checking undefined symbols..."
+nm -f posix -g symbolizer.o | cut -f 1,2 -d \ | LC_COLLATE=C sort -u > undefined.new
+(diff -u $SCRIPT_DIR/global_symbols.txt undefined.new | grep -E "^\+[^+]") && \
+ (echo "Failed: unexpected symbols"; exit 1)
+
+arch() {
+ objdump -f $1 | grep -m1 -Po "(?<=file format ).*$"
+}
+
+SYMBOLIZER_FORMAT=$(arch symbolizer.o)
+echo "Injecting $SYMBOLIZER_FORMAT symbolizer..."
+for A in $TARGE_DIR/libclang_rt.*san*.a; do
+ A_FORMAT=$(arch $A)
+ if [[ "$A_FORMAT" != "$SYMBOLIZER_FORMAT" ]] ; then
+ continue
+ fi
+ (nm -u $A 2>/dev/null | grep -E "__sanitizer_symbolize_code" >/dev/null) || continue
+ echo "$A"
+ $AR rcs $A symbolizer.o
+done
+
+echo "Success!"