Use one libc wrapper copy for sgx and other platforms (#107)

And remove bh_printf macro for other platform header files

core/iwasm/lib/native/libc/libc_wrapper.c

@@ -414,7 +414,7 @@ sprintf_out(int c, struct str_context *ctx)
 static int
 printf_out(int c, struct str_context *ctx)
 {
-    printf("%c", c);
+    bh_printf("%c", c);
     ctx->count++;
     return c;
 }
@@ -542,13 +542,13 @@ _puts_wrapper(int32 str_offset)
         return 0;
 
     str = addr_app_to_native(str_offset);
-    return printf("%s\n", str);
+    return bh_printf("%s\n", str);
 }
 
 static int
 _putchar_wrapper(int c)
 {
-    printf("%c", c);
+    bh_printf("%c", c);
     return 1;
 }
 
@@ -699,7 +699,10 @@ _strcpy_wrapper(int32 dst_offset, int32 src_offset)
 
     dst = addr_app_to_native(dst_offset);
     src = addr_app_to_native(src_offset);
-    strcpy(dst, src);
+    while (*src != '\0')
+        *dst++ = *src++;
+    *dst = '\0';
+
     return dst_offset;
 }
 
@@ -842,7 +845,7 @@ static void
 _llvm_stackrestore_wrapper(uint32 llvm_stack)
 {
     wasm_module_inst_t module_inst = get_module_inst();
-    printf("_llvm_stackrestore called!\n");
+    bh_printf("_llvm_stackrestore called!\n");
     wasm_runtime_set_llvm_stack(module_inst, llvm_stack);
 }
 
@@ -850,7 +853,7 @@ static uint32
 _llvm_stacksave_wrapper()
 {
     wasm_module_inst_t module_inst = get_module_inst();
-    printf("_llvm_stacksave called!\n");
+    bh_printf("_llvm_stacksave called!\n");
     return wasm_runtime_get_llvm_stack(module_inst);
 }
 
@@ -905,13 +908,13 @@ nullFunc_X_wrapper(int32 code)
 static void
 print_i32_wrapper(int i32)
 {
-    printf("%d\n", i32);
+    bh_printf("%d\n", i32);
 }
 
 static void
 print_wrapper(int i32)
 {
-    printf("%d\n", i32);
+    bh_printf("%d\n", i32);
 }
 #endif
 

core/iwasm/lib/native/libc/wasm_libc.cmake

@@ -17,7 +17,7 @@ set (WASM_LIBC_DIR ${CMAKE_CURRENT_LIST_DIR})
 include_directories(${WASM_LIBC_DIR})
 
 
-file (GLOB_RECURSE source_all ${WASM_LIBC_DIR}/libc_wrapper.c)
+file (GLOB_RECURSE source_all ${WASM_LIBC_DIR}/*.c)
 
 set (WASM_LIBC_SOURCE ${source_all})
 

core/iwasm/lib/native/libc/wasm_libc_sgx.cmake

@@ -1,23 +0,0 @@
-# Copyright (C) 2019 Intel Corporation.  All rights reserved.
-#
-# 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
-#
-#      http://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.
-
-set (WASM_LIBC_DIR ${CMAKE_CURRENT_LIST_DIR})
-
-include_directories(${WASM_LIBC_DIR})
-
-
-file (GLOB_RECURSE source_all ${WASM_LIBC_DIR}/libc_wrapper_sgx.c)
-
-set (WASM_LIBC_SOURCE ${source_all})
-

core/iwasm/products/linux-sgx/CMakeLists.txt

@@ -26,6 +26,7 @@ add_definitions(-DUSE_SGX=1)
 add_definitions(-DOPS_INPUT_OUTPUT=1)
 add_definitions(-DOPS_UNSAFE_BUFFERS=0)
 add_definitions(-DWASM_ENABLE_LOG=0)
+add_definitions(-Dbh_printf=bh_printf_sgx)
 
 # Enable repl mode if want to test spec cases
 # add_definitions(-DWASM_ENABLE_REPL)
@@ -71,19 +72,19 @@ include (../../runtime/platform/${PLATFORM}/platform.cmake)
 include (../../runtime/utils/utils.cmake)
 include (../../runtime/vmcore-wasm/vmcore.cmake)
 include (../../lib/native/base/wasm_lib_base.cmake)
-include (../../lib/native/libc/wasm_libc_sgx.cmake)
+include (../../lib/native/libc/wasm_libc.cmake)
 include (${SHARED_LIB_DIR}/platform/${PLATFORM}/shared_platform.cmake)
 include (${SHARED_LIB_DIR}/mem-alloc/mem_alloc.cmake)
-
-#add_executable (iwasm main.c ext_lib_export.c)
-
+include (${SHARED_LIB_DIR}/utils/shared_utils.cmake)
 
 add_library (vmlib
-             ext_lib_export.c
              ${WASM_PLATFORM_LIB_SOURCE}
              ${WASM_UTILS_LIB_SOURCE}
              ${VMCORE_LIB_SOURCE}
              ${WASM_LIB_BASE_DIR}/base_lib_export.c
              ${WASM_LIBC_SOURCE}
              ${PLATFORM_SHARED_SOURCE}
-             ${MEM_ALLOC_SHARED_SOURCE})
+             ${MEM_ALLOC_SHARED_SOURCE}
+             ${UTILS_SHARED_SOURCE})
+
+add_library (extlib ext_lib_export.c)