addr2line.py: Support sourceMappingURL section produced by emcc (#3302)

And update the debug-tools sample.

samples/debug-tools/cmake/FindEMSCRIPTEN.cmake

@@ -0,0 +1,45 @@
+# Copyright (C) 2019 Intel Corporation. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+include(FindPackageHandleStandardArgs)
+
+find_path(EMSCRIPTEN_HOME
+  NAMES upstream/emscripten
+  PATHS /opt/emsdk
+  NO_DEFAULT_PATH
+  NO_CMAKE_PATH
+  NO_CMAKE_SYSTEM_PATH
+  NO_CMAKE_FIND_ROOT_PATH
+  REQUIRED
+)
+
+find_file(EMSCRIPTEN_VERSION_FILE
+  NAMES emscripten-version.txt
+  PATHS ${EMSCRIPTEN_HOME}/upstream/emscripten
+  NO_DEFAULT_PATH
+  NO_CMAKE_PATH
+  NO_CMAKE_SYSTEM_PATH
+  NO_CMAKE_FIND_ROOT_PATH
+  REQUIRED
+)
+
+file(READ ${EMSCRIPTEN_VERSION_FILE} EMSCRIPTEN_VERSION_FILE_CONTENT)
+
+string(REGEX
+    MATCH
+    "[0-9]+\.[0-9]+(\.[0-9]+)*"
+    EMSCRIPTEN_VERSION
+    ${EMSCRIPTEN_VERSION_FILE_CONTENT}
+)
+
+find_package_handle_standard_args(EMSCRIPTEN
+  REQUIRED_VARS EMSCRIPTEN_HOME
+  VERSION_VAR EMSCRIPTEN_VERSION
+  HANDLE_VERSION_RANGE
+)
+
+if(EMSCRIPTEN_FOUND)
+  set(EMSCRIPTEN_TOOLCHAIN  ${EMSCRIPTEN_HOME}/upstream/emscripten/cmake/Modules/Platform/Emscripten.cmake)
+  set(EMCC ${EMSCRIPTEN_HOME}/upstream/emscripten/emcc)
+endif()
+mark_as_advanced(EMSCRIPTEN_TOOLCHAIN EMCC)

samples/debug-tools/cmake/FindWAMRC.cmake

@@ -0,0 +1,27 @@
+# Copyright (C) 2019 Intel Corporation. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+include(FindPackageHandleStandardArgs)
+
+find_path(WAMRC_HOME
+  wamr-compiler
+  PATHS ${CMAKE_CURRENT_SOURCE_DIR}/../../..
+  NO_DEFAULT_PATH
+  NO_CMAKE_PATH
+  NO_CMAKE_SYSTEM_PATH
+  NO_CMAKE_FIND_ROOT_PATH
+  REQUIRED
+)
+
+find_file(WAMRC_BIN
+  wamrc
+  HINTS ${WAMRC_HOME}/wamr-compiler/build
+  NO_DEFAULT_PATH
+  NO_CMAKE_PATH
+  NO_CMAKE_SYSTEM_PATH
+  NO_CMAKE_FIND_ROOT_PATH
+  REQUIRED
+)
+
+find_package_handle_standard_args(WAMRC REQUIRED_VARS WAMRC_BIN)
+mark_as_advanced(WAMRC_BIN)

samples/debug-tools/cmake/FindWASISDK.cmake

@@ -0,0 +1,24 @@
+# Copyright (C) 2019 Intel Corporation. All rights reserved.
+# SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+include(FindPackageHandleStandardArgs)
+
+file(GLOB WASISDK_SEARCH_PATH "/opt/wasi-sdk-*")
+find_path(WASISDK_HOME
+  NAMES share/wasi-sysroot
+  PATHS ${WASISDK_SEARCH_PATH}
+  NO_DEFAULT_PATH
+  REQUIRED
+)
+
+string(REGEX MATCH [0-9]+\.[0-9]+\.*[0-9]* WASISDK_VERSION ${WASISDK_HOME})
+
+find_package_handle_standard_args(WASISDK REQUIRED_VARS WASISDK_HOME VERSION_VAR WASISDK_VERSION)
+
+if(WASISDK_FOUND)
+  set(WASISDK_CC_COMMAND  ${WASISDK_HOME}/bin/clang)
+  set(WASISDK_CXX_COMMAND ${WASISDK_HOME}/bin/clang++)
+  set(WASISDK_TOOLCHAIN   ${WASISDK_HOME}/share/cmake/wasi-sdk.cmake)
+  set(WASISDK_SYSROOT     ${WASISDK_HOME}/share/wasi-sysroot)
+endif()
+mark_as_advanced(WASISDK_CC_COMMAND WASISDK_CXX_COMMAND WASISDK_TOOLCHAIN WASISDK_SYSROOT WASISDK_HOME)