Add tensorflow sample under samples/workload/tensorflow (#427)

samples/workload/tensorflow/build.sh

@@ -0,0 +1,97 @@
+#!/bin/bash
+
+####################################
+#   build tensorflow-lite sample   #
+####################################
+set -x
+set -e
+
+EMSDK_WASM_DIR="$EM_CACHE/wasm"
+BUILD_SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+OUT_DIR=${BUILD_SCRIPT_DIR}/out
+TENSORFLOW_DIR="${BUILD_SCRIPT_DIR}/tensorflow"
+TF_LITE_BUILD_DIR=${TENSORFLOW_DIR}/tensorflow/lite/tools/make
+WAMR_DIR="${BUILD_SCRIPT_DIR}/../../../product-mini/platforms/linux"
+
+function Clear_Before_Exit
+{
+    [[ -f ${TENSORFLOW_DIR}/tf_lite.patch ]] &&
+       rm -f ${TENSORFLOW_DIR}/tf_lite.patch
+    # resume the libc.a under EMSDK_WASM_DIR
+    cd ${EMSDK_WASM_DIR}
+    mv libc.a.bak libc.a
+}
+
+# 1.hack emcc
+cd ${EMSDK_WASM_DIR}
+# back up libc.a
+cp libc.a libc.a.bak
+# delete some objects in libc.a
+emar d libc.a open.o
+emar d libc.a mmap.o
+emar d libc.a munmap.o
+emranlib libc.a
+
+# 2. build tf-lite
+cd ${BUILD_SCRIPT_DIR}
+# 2.1 clone tf repo from Github and checkout to 2303ed commit
+if [ ! -d "tensorflow" ]; then
+    git clone https://github.com/tensorflow/tensorflow.git
+fi
+
+cd ${TENSORFLOW_DIR}
+git checkout 2303ed4bdb344a1fc4545658d1df6d9ce20331dd
+
+# 2.2 copy the tf-lite.patch to tensorflow_root_dir and apply
+cd ${TENSORFLOW_DIR}
+cp ${BUILD_SCRIPT_DIR}/tf_lite.patch .
+git checkout tensorflow/lite/tools/make/Makefile
+git checkout tensorflow/lite/tools/make/targets/linux_makefile.inc
+
+if [[ $(git apply tf_lite.patch 2>&1) =~ "error" ]]; then
+    echo "git apply patch failed, please check tf-lite related changes..."
+    Clear_Before_Exit
+    exit 0
+fi
+
+cd ${TF_LITE_BUILD_DIR}
+# 2.3 download dependencies
+if [ ! -d "${TF_LITE_BUILD_DIR}/downloads" ]; then
+    source download_dependencies.sh
+fi
+
+# 2.4 build tf-lite target
+if [ -d "${TF_LITE_BUILD_DIR}/gen" ]; then
+    rm -fr ${TF_LITE_BUILD_DIR}/gen
+fi
+make -j 4 -C "${TENSORFLOW_DIR}" -f ${TF_LITE_BUILD_DIR}/Makefile $@
+
+# 2.5 copy /make/gen target files to out/
+rm -rf ${OUT_DIR}
+mkdir ${OUT_DIR}
+cp -r ${TF_LITE_BUILD_DIR}/gen/linux_x86_64/bin/. ${OUT_DIR}/
+
+# 3. build iwasm with pthread and libc_emcc enable
+cd ${WAMR_DIR}
+rm -fr build && mkdir build
+cd build && cmake .. -DWAMR_BUILD_LIB_PTHREAD=1 -DWAMR_BUILD_LIBC_EMCC=1
+make
+
+# 4. run tensorflow with iwasm
+cd ${BUILD_SCRIPT_DIR}
+# 4.1 download tf-lite model
+if [ ! -f mobilenet_quant_v1_224.tflite ]; then
+    wget "https://storage.googleapis.com/download.tensorflow.org/models/tflite/mobilenet_v1_224_android_quant_2017_11_08.zip"
+    unzip mobilenet_v1_224_android_quant_2017_11_08.zip
+fi
+
+# 4.2 run tf-lite model with iwasm
+echo "---> run tensorflow benchmark model with iwasm"
+${WAMR_DIR}/build/iwasm --heap-size=10475860 \
+                        ${OUT_DIR}/benchmark_model.wasm \
+                        --graph=mobilenet_quant_v1_224.tflite --max_secs=300
+
+Clear_Before_Exit
+
+
+