samples: Simplify helloworld demo to match helloworld test

The helloworld demo used a really complicated system to build the elf
file on the host and then transfer it to the docker image. It's better
to simply build it inside docker, as the test does.

This commit copies Dockerfile, Makefile and helloworld.c from the test
to the sample. The Makefile has been modified to still use
enclave_config.json (the test wasn't using it).

samples/basic/helloworld/Dockerfile

@@ -1,25 +1,11 @@
-FROM alpine:3.8
+FROM alpine:3.6 AS builder
 
-ARG UID
-ARG GID
+RUN apk add --no-cache gcc musl-dev
 
-USER root
+ADD *.c /
+RUN gcc -g -o helloworld helloworld.c
 
-# Build packages: build-base gcc wget git curl
+FROM alpine:3.6
 
-RUN apk add --no-cache bash shadow sudo && \
-    addgroup -S alpine; \
-    adduser -S -G alpine -s /bin/bash user; \
-    echo "user ALL=(root) NOPASSWD:ALL" > /etc/sudoers.d/user && \
-    chmod 0440 /etc/sudoers.d/user
-
-WORKDIR /app
-RUN chown user:alpine /app
-USER user
-
-#ENV PS1="\[\033[31;40;1m\][\u@\h]\[\033[32;40;1m\] \W\[\033[33;40;1m\]>\[\033[0m\]"
-
-COPY --chown=user:alpine app/ .
-
-# Start from a Bash prompt
-CMD ["/bin/bash"]
+COPY --from=builder helloworld .
+ADD app /app

samples/basic/helloworld/Makefile

@@ -1,57 +1,41 @@
+include ../../common.mk
 
-APP_ROOT=app
-PROG=${APP_ROOT}/helloworld
-PROG_NONPIE=${APP_ROOT}/helloworld-nonpie
-PROG_C=helloworld.c
+PROG=helloworld
+PROG_SRC=$(PROG).c
+IMAGE_SIZE=5M
 
-DISK_IMAGE=sgxlkl-helloworld.img
-IMAGE_SIZE=100M
+EXECUTION_TIMEOUT=60
 
-SGXLKL_ROOT=../../..
+SGXLKL_ENV=SGXLKL_VERBOSE=1 SGXLKL_KERNEL_VERBOSE=1
+SGXLKL_HW_PARAMS=--hw-debug
+SGXLKL_SW_PARAMS=--sw-debug
 
-MUSL_CC=${SGXLKL_ROOT}/build/host-musl/bin/musl-gcc
-
-SGXLKL_STARTER=$(SGXLKL_ROOT)/build/sgx-lkl-run-oe
-
-ifeq ($(SGXLKL_VERBOSE),)
-SGXLKL_ENV=\
-   SGXLKL_VERBOSE=1 SGXLKL_KERNEL_VERBOSE=0 SGXLKL_TRACE_SIGNAL=0\
-   SGXLKL_TRACE_HOST_SYSCALL=0 SGXLKL_TRACE_LKL_SYSCALL=0 SGXLKL_TRACE_MMAP=0
-else
-SGXLKL_ENV=
-endif
-
-SGXLKL_DISK_TOOL=${SGXLKL_ROOT}/tools/sgx-lkl-disk
-SGXLKL_GDB=${SGXLKL_ROOT}/tools/gdb/sgx-lkl-gdb
+SGXLKL_ROOTFS=sgx-lkl-rootfs.img
 
 .DELETE_ON_ERROR:
 .PHONY: all clean
 
-all: $(DISK_IMAGE)
+$(SGXLKL_ROOTFS): $(PROG_SRC)
+	${SGXLKL_DISK_TOOL} create --size=${IMAGE_SIZE} --docker=./Dockerfile ${SGXLKL_ROOTFS}
 
-clean:
-	rm -f $(DISK_IMAGE) $(PROG) $(PROG_NONPIE)
-
-$(PROG): $(PROG_C)
-	${MUSL_CC} -fPIE -pie -o $@ $(PROG_C)
+gettimeout:
+	@echo ${EXECUTION_TIMEOUT}
 
-# non-PIE executable are currently unsupported by SGX-LKL-OE
-$(PROG_NONPIE): $(PROG_C)
-	${MUSL_CC} -fno-pie -no-pie -o $@ $(PROG_C)
+run: run-hw run-sw
 
-$(DISK_IMAGE): $(PROG) $(PROG_NONPIE)
-	${SGXLKL_DISK_TOOL} create --size=${IMAGE_SIZE} --copy=./${APP_ROOT}/ ${DISK_IMAGE}
+run-gdb: run-hw-gdb
 
-run: run-hw
+run-hw: ${SGXLKL_ROOTFS}
+	$(SGXLKL_ENV) $(SGXLKL_STARTER) $(SGXLKL_HW_PARAMS) --enclave-config enclave_config.json $(SGXLKL_ROOTFS) $(PROG)
 
-run-hw: $(DISK_IMAGE)
-	${SGXLKL_ENV} ${SGXLKL_STARTER} --hw-debug --enclave-config enclave_config.json $(DISK_IMAGE)
+run-sw: ${SGXLKL_ROOTFS}
+	$(SGXLKL_ENV) $(SGXLKL_STARTER) $(SGXLKL_SW_PARAMS) --enclave-config enclave_config.json $(SGXLKL_ROOTFS) $(PROG)
 
-run-hw-gdb: $(DISK_IMAGE)
-	${SGXLKL_ENV} ${SGXLKL_GDB} --args ${SGXLKL_STARTER} --hw-debug --enclave-config enclave_config.json $(DISK_IMAGE)
+run-hw-gdb: ${SGXLKL_ROOTFS}
+	$(SGXLKL_ENV) $(SGXLKL_GDB) --args $(SGXLKL_STARTER) $(SGXLKL_HW_PARAMS) --enclave-config enclave_config.json $(SGXLKL_ROOTFS) $(PROG)
 
-run-sw: $(DISK_IMAGE)
-	${SGXLKL_ENV} ${SGXLKL_STARTER} --sw-debug --enclave-config enclave_config.json $(DISK_IMAGE)
+run-sw-gdb: ${SGXLKL_ROOTFS}
+	$(SGXLKL_ENV) $(SGXLKL_GDB) --args $(SGXLKL_STARTER) $(SGXLKL_SW_PARAMS) --enclave-config enclave_config.json $(SGXLKL_ROOTFS) $(PROG)
 
-run-sw-gdb: $(DISK_IMAGE)
-	${SGXLKL_ENV} ${SGXLKL_GDB} --args ${SGXLKL_STARTER} --sw-debug --enclave-config enclave_config.json $(DISK_IMAGE)
+clean:
+	rm -f $(SGXLKL_ROOTFS) $(PROG)

samples/basic/helloworld/helloworld.c

@@ -13,6 +13,7 @@ int main(int argc, char** argv)
     {
         fprintf(
             stderr, "Could not open file %s: %s\n", HW_FILE, strerror(errno));
+        fprintf(stderr, "TEST_FAILED");
         exit(1);
     }
 
@@ -28,8 +29,8 @@ int main(int argc, char** argv)
             "Could not read first line of file %s: %s\n",
             HW_FILE,
             strerror(errno));
+        fprintf(stderr, "TEST_FAILED");
         exit(1);
     }
-
     return 0;
 }