Add fizzy-wasi tool

CMakeLists.txt

@@ -12,6 +12,8 @@ include(CableBuildType)
 include(CableCompilerSettings)
 include(CMakeDependentOption)
 
+option(FIZZY_WASI "Enable WASI support" OFF)
+
 option(FIZZY_TESTING "Enable Fizzy internal tests" OFF)
 cmake_dependent_option(HUNTER_ENABLED "Enable Hunter package manager" ON
     "FIZZY_TESTING" OFF)
@@ -104,6 +106,10 @@ if(FIZZY_TESTING)
     add_subdirectory(test)
 endif()
 
+if(FIZZY_WASI)
+    add_subdirectory(tools/wasi)
+endif()
+
 set(CMAKE_INSTALL_CMAKEPACKAGEDIR ${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME})
 
 write_basic_package_version_file(fizzyConfigVersion.cmake COMPATIBILITY ExactVersion)

README.md

@@ -45,6 +45,26 @@ $ cmake --build .
 This will build Fizzy as a library and since there is no public API
 (the so called *embedder API* in WebAssembly) yet, this is not very useful.
 
+## WASI
+
+Building with the `FIZZY_WASI` option will output a `fizzy-wasi` binary implementing
+the [WASI] API (a very limited subset of [wasi_snapshot_preview1], to be precise).
+It uses [uvwasi] under the hood. It can be used to execute WASI-compatible binaries on the command line.
+
+```sh
+$ mkdir build && cd build
+$ cmake -DFIZZY_WASI=ON ..
+$ cmake --build .
+```
+
+Try it with a Hello World example:
+```sh
+$ bin/fizzy-wasi ../test/smoketests/wasi/helloworld.wasm
+hello world
+```
+
+## Testing tools
+
 Building with the `FIZZY_TESTING` option will output a few useful utilities:
 
 ```sh
@@ -152,15 +172,19 @@ For a list of releases and changelog see the [CHANGELOG file](./CHANGELOG.md).
 
 Licensed under the [Apache License, Version 2.0].
 
-[webassembly]: https://webassembly.org/
+[webassembly]: https://webassembly.org
 [standard readme]: https://github.com/RichardLitt/standard-readme
 [circleci]: https://circleci.com/gh/wasmx/fizzy/tree/master
-[codecov]: https://codecov.io/gh/wasmx/fizzy/
+[codecov]: https://codecov.io/gh/wasmx/fizzy
 [Apache License, Version 2.0]: LICENSE
 [@axic]: https://github.com/axic
 [@chfast]: https://github.com/chfast
 [@gumb0]: https://github.com/gumb0
 
+[WASI]: https://github.com/WebAssembly/WASI
+[uvwasi]: https://github.com/cjihrig/uvwasi
+[wasi_snapshot_preview1]: https://github.com/WebAssembly/WASI/blob/master/phases/snapshot/witx/wasi_snapshot_preview1.witx
+
 [webassembly badge]: https://img.shields.io/badge/WebAssembly-Engine-informational.svg?logo=webassembly
 [readme style standard badge]: https://img.shields.io/badge/readme%20style-standard-brightgreen.svg
 [circleci badge]: https://img.shields.io/circleci/project/github/wasmx/fizzy/master.svg?logo=circleci

circle.yml

@@ -110,7 +110,7 @@ commands:
           working_directory: ~/build
           command: |
             rm -f CMakeCache.txt
-            cmake ../project -G Ninja -DCMAKE_INSTALL_PREFIX=~/install -DCMAKE_BUILD_TYPE=<<parameters.build_type>> -DFIZZY_TESTING=ON <<parameters.cmake_options>>
+            cmake ../project -G Ninja -DCMAKE_INSTALL_PREFIX=~/install -DCMAKE_BUILD_TYPE=<<parameters.build_type>> -DFIZZY_TESTING=ON -DFIZZY_WASI=ON <<parameters.cmake_options>>
       - save_cache:
           name: "Save Hunter cache"
           key: *hunter-cache-key
@@ -143,7 +143,7 @@ commands:
           name: "Collect coverage data"
           working_directory: ~/build
           command: |
-            binaries='-object bin/fizzy-unittests -object bin/fizzy-spectests -object bin/fizzy-bench -object bin/fizzy-testfloat'
+            binaries='-object bin/fizzy-unittests -object bin/fizzy-spectests -object bin/fizzy-bench -object bin/fizzy-testfloat -object bin/fizzy-wasi'
 
             mkdir coverage
             find -name '*.profraw'

cmake/ProjectUVWASI.cmake

@@ -0,0 +1,52 @@
+if(ProjectUVWASIIncluded)
+    return()
+endif()
+set(ProjectUVWASIIncluded TRUE)
+
+include(ExternalProject)
+
+set(prefix ${CMAKE_BINARY_DIR}/_deps)
+set(source_dir ${prefix}/src/uvwasi)
+set(binary_dir ${prefix}/src/uvwasi-build)
+set(include_dir ${source_dir}/include)
+set(uvwasi_library ${binary_dir}/${CMAKE_STATIC_LIBRARY_PREFIX}uvwasi_a${CMAKE_STATIC_LIBRARY_SUFFIX})
+set(uv_library ${binary_dir}/_deps/libuv-build/${CMAKE_STATIC_LIBRARY_PREFIX}uv_a${CMAKE_STATIC_LIBRARY_SUFFIX})
+
+if(UNIX AND NOT APPLE)
+    set(system_libs "pthread;dl;rt")
+endif()
+
+ExternalProject_Add(uvwasi
+    EXCLUDE_FROM_ALL 1
+    PREFIX ${prefix}
+    DOWNLOAD_NAME uvwasi-0.0.10.tar.gz
+    DOWNLOAD_DIR ${prefix}/downloads
+    SOURCE_DIR ${source_dir}
+    BINARY_DIR ${binary_dir}
+    URL https://github.com/cjihrig/uvwasi/archive/v0.0.10.tar.gz
+    URL_HASH SHA256=39135f4dd4a44013399ceed7166391ffc5c09655e4bfbf851da2be039e6985df
+    CMAKE_ARGS
+    -DCMAKE_INSTALL_PREFIX=<INSTALL_DIR>
+    -DCMAKE_C_COMPILER=${CMAKE_C_COMPILER}
+    -DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}
+    -DUVWASI_DEBUG_LOG=OFF
+    -DCODE_COVERAGE=OFF
+    -DASAN=OFF
+    -DUVWASI_BUILD_TESTS=OFF
+    BUILD_BYPRODUCTS ${uvwasi_library} ${uv_library}
+)
+
+add_library(uvwasi::uvwasi STATIC IMPORTED)
+
+file(MAKE_DIRECTORY ${include_dir})
+
+set_target_properties(
+    uvwasi::uvwasi
+    PROPERTIES
+    IMPORTED_CONFIGURATIONS Release
+    IMPORTED_LOCATION_RELEASE ${uvwasi_library}
+    INTERFACE_INCLUDE_DIRECTORIES "${include_dir};${binary_dir}"
+    INTERFACE_LINK_LIBRARIES "${uv_library};${system_libs}"
+)
+
+add_dependencies(uvwasi::uvwasi uvwasi)

lgtm.yml

@@ -9,4 +9,4 @@ extraction:
     configure:
       command:
         - cd $LGTM_SRC/_lgtm_build_dir
-        - cmake -DFIZZY_TESTING=ON -DCMAKE_BUILD_TYPE=Release ..
+        - cmake -DFIZZY_TESTING=ON -DFIZZY_WASI=ON -DCMAKE_BUILD_TYPE=Release ..

test/smoketests/CMakeLists.txt

@@ -4,3 +4,6 @@
 
 add_subdirectory(benchmarks)
 add_subdirectory(spectests)
+if(FIZZY_WASI)
+    add_subdirectory(wasi)
+endif()

test/smoketests/wasi/CMakeLists.txt

@@ -0,0 +1,97 @@
+# Fizzy: A fast WebAssembly interpreter
+# Copyright 2020 The Fizzy Authors.
+# SPDX-License-Identifier: Apache-2.0
+
+add_test(
+    NAME fizzy/smoketests/wasi/cli-missing-arg
+    COMMAND fizzy-wasi
+)
+set_tests_properties(
+    fizzy/smoketests/wasi/cli-missing-arg
+    PROPERTIES
+    PASS_REGULAR_EXPRESSION "Missing executable argument"
+)
+
+add_test(
+    NAME fizzy/smoketests/wasi/cli-invalid-file
+    COMMAND fizzy-wasi ${CMAKE_CURRENT_LIST_DIR}
+)
+set_tests_properties(
+    fizzy/smoketests/wasi/cli-invalid-file
+    PROPERTIES
+    PASS_REGULAR_EXPRESSION "File does not exists or is irregular:"
+)
+
+add_test(
+    NAME fizzy/smoketests/wasi/cli-missing-file
+    COMMAND fizzy-wasi ${CMAKE_CURRENT_LIST_DIR}/helloworld.nonexistent.wasm
+)
+set_tests_properties(
+    fizzy/smoketests/wasi/cli-missing-file
+    PROPERTIES
+    PASS_REGULAR_EXPRESSION "File does not exists or is irregular:"
+)
+
+add_test(
+    NAME fizzy/smoketests/wasi/helloworld
+    COMMAND fizzy-wasi ${CMAKE_CURRENT_LIST_DIR}/helloworld.wasm
+)
+set_tests_properties(
+    fizzy/smoketests/wasi/helloworld
+    PROPERTIES
+    PASS_REGULAR_EXPRESSION "hello world"
+)
+
+add_test(
+    NAME fizzy/smoketests/wasi/missing-start
+    COMMAND fizzy-wasi ${CMAKE_CURRENT_LIST_DIR}/missingstart.wasm
+)
+set_tests_properties(
+    fizzy/smoketests/wasi/missing-start
+    PROPERTIES
+    PASS_REGULAR_EXPRESSION "File is not WASI compatible \\(_start not found\\)"
+)
+
+add_test(
+    NAME fizzy/smoketests/wasi/invalid-start
+    COMMAND fizzy-wasi ${CMAKE_CURRENT_LIST_DIR}/invalidstart.wasm
+)
+set_tests_properties(
+    fizzy/smoketests/wasi/invalid-start
+    PROPERTIES
+    PASS_REGULAR_EXPRESSION "File is not WASI compatible \\(_start has invalid signature\\)"
+)
+
+add_test(
+    NAME fizzy/smoketests/wasi/missing-memory
+    COMMAND fizzy-wasi ${CMAKE_CURRENT_LIST_DIR}/missingmemory.wasm
+)
+set_tests_properties(
+    fizzy/smoketests/wasi/missing-memory
+    PROPERTIES
+    PASS_REGULAR_EXPRESSION "File is not WASI compatible \\(no memory exported\\)"
+)
+
+add_test(
+    NAME fizzy/smoketests/wasi/trap
+    COMMAND fizzy-wasi ${CMAKE_CURRENT_LIST_DIR}/trap.wasm
+)
+set_tests_properties(
+    fizzy/smoketests/wasi/trap
+    PROPERTIES
+    PASS_REGULAR_EXPRESSION "Execution aborted with WebAssembly trap"
+)
+
+# Dump coverage data to distinct files (otherwise file will be overwritten).
+set_tests_properties(
+    fizzy/smoketests/wasi/cli-missing-arg
+    fizzy/smoketests/wasi/cli-missing-file
+    fizzy/smoketests/wasi/cli-invalid-file
+    fizzy/smoketests/wasi/helloworld
+    fizzy/smoketests/wasi/missing-start
+    fizzy/smoketests/wasi/invalid-start
+    fizzy/smoketests/wasi/missing-memory
+    fizzy/smoketests/wasi/trap
+    PROPERTIES
+    ENVIRONMENT LLVM_PROFILE_FILE=${CMAKE_BINARY_DIR}/wasi-%p.profraw
+)

tools/wasi/CMakeLists.txt

@@ -0,0 +1,20 @@
+# Fizzy: A fast WebAssembly interpreter
+# Copyright 2019-2020 The Fizzy Authors.
+# SPDX-License-Identifier: Apache-2.0
+
+include(ProjectUVWASI)
+
+set(fizzy_include_dir ${PROJECT_SOURCE_DIR}/lib/fizzy)
+
+add_executable(fizzy-wasi wasi.cpp)
+target_compile_features(fizzy-wasi PRIVATE cxx_std_17)
+target_link_libraries(fizzy-wasi PRIVATE fizzy::fizzy-internal uvwasi::uvwasi)
+target_include_directories(fizzy-wasi PRIVATE ${fizzy_include_dir})
+
+if(UNIX AND NOT APPLE)
+    # For libstdc++ up to version 8 (included) this is needed for proper <filesystem> support.
+    # Otherwise, the result program will crash on first use (no linker errors).
+    # For libstdc++ 9, this is not needed, but cause no harm.
+    # Clang compiler on linux may select libstdc++8 in some configurations.
+    target_link_libraries(fizzy-wasi PRIVATE stdc++fs)
+endif()