Implement threads extension

.github/workflows/tests.yml

@@ -23,69 +23,82 @@ jobs:
         build: [release, debug]
         threads: [true, false]
         system:
-          - { target: gcc,                                              cc: gcc,                                                    }
-          - { target: clang,                                            cc: clang,                                                  }
-          - { target: arm,      toolchain: gcc-arm-linux-gnueabi,       cc: arm-linux-gnueabi-gcc,       qemu: qemu-arm-static      }
-          - { target: armhf,    toolchain: gcc-arm-linux-gnueabihf,     cc: arm-linux-gnueabihf-gcc,     qemu: qemu-arm-static      }
-          - { target: aarch64,  toolchain: gcc-aarch64-linux-gnu,       cc: aarch64-linux-gnu-gcc,       qemu: qemu-aarch64-static  }
-          - { target: riscv64,  toolchain: gcc-riscv64-linux-gnu,       cc: riscv64-linux-gnu-gcc,       qemu: qemu-riscv64-static  }
-          - { target: ppc,      toolchain: gcc-powerpc-linux-gnu,       cc: powerpc-linux-gnu-gcc,       qemu: qemu-ppc-static      }
-          - { target: ppc64,    toolchain: gcc-powerpc64-linux-gnu,     cc: powerpc64-linux-gnu-gcc,     qemu: qemu-ppc64-static    }
-          - { target: s390x,    toolchain: gcc-s390x-linux-gnu,         cc: s390x-linux-gnu-gcc,         qemu: qemu-s390x-static    }
-          - { target: alpha,    toolchain: gcc-alpha-linux-gnu,         cc: alpha-linux-gnu-gcc,         qemu: qemu-alpha-static    }
+          - { target: gcc,                                              cc: gcc                                                                         }
+          - { target: clang,                                            cc: clang                                                                       }
+          - { target: arm,      toolchain: gcc-arm-linux-gnueabi,       cc: arm-linux-gnueabi-gcc,       qemu: qemu-arm-static,        linkAtomic: true }
+          - { target: armhf,    toolchain: gcc-arm-linux-gnueabihf,     cc: arm-linux-gnueabihf-gcc,     qemu: qemu-arm-static                          }
+          - { target: aarch64,  toolchain: gcc-aarch64-linux-gnu,       cc: aarch64-linux-gnu-gcc,       qemu: qemu-aarch64-static                      }
+          - { target: riscv64,  toolchain: gcc-riscv64-linux-gnu,       cc: riscv64-linux-gnu-gcc,       qemu: qemu-riscv64-static,    linkAtomic: true }
+          - { target: ppc,      toolchain: gcc-powerpc-linux-gnu,       cc: powerpc-linux-gnu-gcc,       qemu: qemu-ppc-static,        linkAtomic: true }
+          - { target: ppc64,    toolchain: gcc-powerpc64-linux-gnu,     cc: powerpc64-linux-gnu-gcc,     qemu: qemu-ppc64-static                        }
+          - { target: s390x,    toolchain: gcc-s390x-linux-gnu,         cc: s390x-linux-gnu-gcc,         qemu: qemu-s390x-static                        }
+          - { target: alpha,    toolchain: gcc-alpha-linux-gnu,         cc: alpha-linux-gnu-gcc,         qemu: qemu-alpha-static                        }
 
           # Architectures with expected failures (mostly due to FP issues, e.g. NaN representation, conversion, arithemtic)
-          - { target: i386,     toolchain: gcc-multilib,                cc: clang -m32,                  qemu: qemu-i386-static     }
-          - { target: hppa,     toolchain: gcc-hppa-linux-gnu,          cc: hppa-linux-gnu-gcc,          qemu: qemu-hppa-static     }
-          - { target: mips,     toolchain: gcc-mips-linux-gnu,          cc: mips-linux-gnu-gcc,          qemu: qemu-mips-static     }
-          - { target: mipsel,   toolchain: gcc-mipsel-linux-gnu,        cc: mipsel-linux-gnu-gcc,        qemu: qemu-mipsel-static   }
-          - { target: mips64,   toolchain: gcc-mips64-linux-gnuabi64,   cc: mips64-linux-gnuabi64-gcc,   qemu: qemu-mips64-static   }
-          - { target: mips64el, toolchain: gcc-mips64el-linux-gnuabi64, cc: mips64el-linux-gnuabi64-gcc, qemu: qemu-mips64el-static }
-          - { target: ppc64le,  toolchain: gcc-powerpc64le-linux-gnu,   cc: powerpc64le-linux-gnu-gcc,   qemu: qemu-ppc64le-static  }
+          - { target: i386,     toolchain: gcc-multilib,                cc: clang -m32,                  qemu: qemu-i386-static,       linkAtomic: true }
+          - { target: hppa,     toolchain: gcc-hppa-linux-gnu,          cc: hppa-linux-gnu-gcc,          qemu: qemu-hppa-static                         }
+          - { target: mips,     toolchain: gcc-mips-linux-gnu,          cc: mips-linux-gnu-gcc,          qemu: qemu-mips-static,       linkAtomic: true }
+          - { target: mipsel,   toolchain: gcc-mipsel-linux-gnu,        cc: mipsel-linux-gnu-gcc,        qemu: qemu-mipsel-static,     linkAtomic: true }
+          - { target: mips64,   toolchain: gcc-mips64-linux-gnuabi64,   cc: mips64-linux-gnuabi64-gcc,   qemu: qemu-mips64-static                       }
+          - { target: mips64el, toolchain: gcc-mips64el-linux-gnuabi64, cc: mips64el-linux-gnuabi64-gcc, qemu: qemu-mips64el-static                     }
+          - { target: ppc64le,  toolchain: gcc-powerpc64le-linux-gnu,   cc: powerpc64le-linux-gnu-gcc,   qemu: qemu-ppc64le-static                      }
 
           # Disabled due to miscompilation or qemu issues (?)
-          # - { target: sh4,      toolchain: gcc-sh4-linux-gnu,           cc: sh4-linux-gnu-gcc,           qemu: qemu-sh4-static      }
-          # - { target: sparc64,  toolchain: gcc-sparc64-linux-gnu,       cc: sparc64-linux-gnu-gcc,       qemu: qemu-sparc64-static  }
+          # - { target: sh4,      toolchain: gcc-sh4-linux-gnu,           cc: sh4-linux-gnu-gcc,           qemu: qemu-sh4-static                          }
+          # - { target: sparc64,  toolchain: gcc-sparc64-linux-gnu,       cc: sparc64-linux-gnu-gcc,       qemu: qemu-sparc64-static                      }
 
           # Disabled due to too large `switch'-statement
-          # - { target: m68k,     toolchain: gcc-m68k-linux-gnu,          cc: m68k-linux-gnu-gcc,          qemu: qemu-m68k-static     }
+          # - { target: m68k,     toolchain: gcc-m68k-linux-gnu,          cc: m68k-linux-gnu-gcc,          qemu: qemu-m68k-static                         }
 
     env:
       CC: ${{ matrix.system.cc }}
 
     steps:
       - uses: actions/checkout@v3
+
       - name: Install QEMU
         if: ${{ matrix.system.qemu }}
         run: |
           sudo apt update
           sudo apt install qemu-user-static
+
       - name: Install ${{ matrix.system.toolchain }}
         if: ${{ matrix.system.toolchain }}
         run: |
           sudo apt install ${{ matrix.system.toolchain }}
+
       - uses: dorny/paths-filter@v2
         id: changes
         with:
           filters: |
             w2c2:
               - 'w2c2/**'
+              - 'futex/**'
+              - 'tests/**'
             wasi:
               - 'wasi/**'
+
       - if: steps.changes.outputs.w2c2 == 'true'
         name: Build w2c2
         env:
           LDFLAGS: -static
         working-directory: ./w2c2
         run: make BUILD=${{ matrix.build }} FEATURES="unistd libgen getopt glob ${{ matrix.threads && 'threads' || '' }}"
+
+      - if: steps.changes.outputs.w2c2 == 'true'
+        name: Build futex
+        working-directory: ./futex
+        run: make BUILD=${{ matrix.build }}
+
       - if: steps.changes.outputs.w2c2 == 'true'
-        name: Run w2c2 tests
+        name: Run WebAssembly tests
         env:
-          LDFLAGS: -static
+          LDFLAGS: -static ${{ matrix.system.linkAtomic && '-latomic' || '' }}
           ARCH: ${{ matrix.system.target }}
         working-directory: ./tests
         shell: bash
         run: make run-tests
+
       - if: steps.changes.outputs.wasi == 'true'
         name: Build wasi
         working-directory: ./wasi
@@ -103,85 +116,40 @@ jobs:
 
     steps:
       - uses: actions/checkout@v3
+
       - uses: dorny/paths-filter@v2
         id: changes
         with:
           filters: |
             w2c2:
               - 'w2c2/**'
+              - 'futex/**'
+              - 'tests/**'
             wasi:
               - 'wasi/**'
+
       - if: steps.changes.outputs.w2c2 == 'true'
         name: Build w2c2
         working-directory: ./w2c2
         run: make BUILD=${{ matrix.build }} FEATURES="unistd libgen getopt glob ${{ matrix.threads && 'threads' || '' }}"
+
       - if: steps.changes.outputs.w2c2 == 'true'
-        name: Run tests
-        working-directory: ./tests
-        shell: bash
+        name: Build futex
+        working-directory: ./futex
+        run: make BUILD=${{ matrix.build }}
+
+      - if: steps.changes.outputs.w2c2 == 'true'
+        name: Run WebAssembly tests
         env:
           ARCH: ${{ matrix.system.target }}
+        working-directory: ./tests
+        shell: bash
         run: make run-tests
+
       - if: steps.changes.outputs.wasi == 'true'
         name: Build wasi
         working-directory: ./wasi
-        run: make BUILD=${{ matrix.build }} FEATURES="unistd sysuio systime sysresource strndup fcntl timespec lstat"
-
-# Disabled due to sqrt issues
-#
-#     windows-mingw:
-#         runs-on: windows-latest
-#         name: "Windows (mingw), ${{ matrix.system.target }} (build=${{ matrix.build }}, threads=${{ matrix.threads }})"
-#
-#         strategy:
-#           fail-fast: false
-#           matrix:
-#             build: [release, debug]
-#             threads: [true, false]
-#             system:
-#               - { target: mingw64, env: x86_64 }
-#               - { target: mingw32, env: i686   }
-#
-#         defaults:
-#           run:
-#             shell: msys2 {0}
-#
-#         env:
-#           CC: gcc
-#
-#         steps:
-#           - uses: actions/checkout@v3
-#           - uses: msys2/setup-msys2@v2
-#             with:
-#               msystem: ${{ matrix.system.target }}
-#               install: >-
-#                 make
-#                 gcc
-#           - uses: dorny/paths-filter@v2
-#             id: changes
-#             with:
-#               filters: |
-#                 w2c2:
-#                   - 'w2c2/**'
-#                 wasi:
-#                   - 'wasi/**'
-#           - if: steps.changes.outputs.w2c2 == 'true'
-#             name: Build w2c2
-#             env:
-#               LDFLAGS: -static
-#             working-directory: ./w2c2
-#             run: make BUILD=${{ matrix.build }} FEATURES="getopt ${{ matrix.threads && 'threads' || '' }}"
-#           - if: steps.changes.outputs.w2c2 == 'true'
-#             name: Run tests
-#             working-directory: ./tests
-#             shell: bash
-#             env:
-#               ARCH: ${{ matrix.system.target }}
-#             run: make run-tests
-#           - if: steps.changes.outputs.wasi == 'true'
-#             name: Build wasi
-#             working-directory: ./wasi
-#             run: make BUILD=${{ matrix.build }}
+        run: make BUILD=${{ matrix.build }} FEATURES="unistd sysuio systime sysresource strndup fcntl timespec lstat pthreads"
 
   windows-msvc:
     runs-on: windows-2019
@@ -197,13 +165,14 @@ jobs:
               - 'w2c2/**'
             wasi:
               - 'wasi/**'
+
       - if: steps.changes.outputs.w2c2 == 'true'
         name: Build w2c2
         working-directory: ./w2c2
         run: |
           cmake -Bbuild
           cmake --build build
-      # TODO: run tests
+
       - if: steps.changes.outputs.wasi == 'true'
         name: Build wasi
         working-directory: ./wasi

README.md

@@ -18,10 +18,13 @@ Working towards [WebAssembly as the Elusive Universal Binary](https://kripken.gi
 
 ## Features
 
-- Implements the [WebAssembly Core Specification 1.0](https://www.w3.org/TR/wasm-core-1/), as well as
+- Implements the [WebAssembly Core Specification 1.0](https://www.w3.org/TR/wasm-core-1/)
+- Implements several extensions:
+  - [Threads and atomics](https://github.com/WebAssembly/threads/blob/master/proposals/threads/Overview.md)
   - [Bulk memory operations](https://github.com/WebAssembly/bulk-memory-operations/blob/master/proposals/bulk-memory-operations/Overview.md)
+  - [Conditional data segment initialization](https://github.com/WebAssembly/bulk-memory-operations/blob/master/proposals/bulk-memory-operations/Overview.md)
   - [Sign-extension operators](https://github.com/WebAssembly/sign-extension-ops/blob/master/proposals/sign-extension-ops/Overview.md)
-  - [Non-trapping Float-to-int Conversions](https://github.com/WebAssembly/nontrapping-float-to-int-conversions/blob/main/proposals/nontrapping-float-to-int-conversion/Overview.md)
+  - [Non-trapping float-to-int conversions](https://github.com/WebAssembly/nontrapping-float-to-int-conversions/blob/main/proposals/nontrapping-float-to-int-conversion/Overview.md)
 - Passes 99.9% of the WebAssembly core semantics test suite
 - Written in C89 and generates C89
 - Support for many operating systems (e.g. Mac OS X, Mac OS 9, Haiku, Rhapsody, OPENSTEP, NeXTSTEP, DOS, Windows XP, etc.)
@@ -35,7 +38,10 @@ Working towards [WebAssembly as the Elusive Universal Binary](https://kripken.gi
   - Function names, if function names are provided in the [`names` custom section](https://webassembly.github.io/spec/core/appendix/custom.html#function-names)
   - Source line mapping, if DWARF line information is provided in the [`.debug_line` custom section](https://yurydelendik.github.io/webassembly-dwarf/).
     Requires [libdwarf](https://github.com/davea42/libdwarf-code) to be installed. See instructions below.
-- WASI implementation which is able to run clang and Python
+- WASI implementation
+  - Able to run clang and Python
+  - Support for many operating systems and architectures, support for big-endian systems
+  - Implements the [threads proposal](https://github.com/webAssembly/wasi-threads)
 
 ## Performance
 
@@ -116,50 +122,51 @@ make run-tests
 
 ## WASI Status
 
-- [x] args_get
-- [x] args_sizes_get
-- [x] clock_res_get
-- [x] clock_time_get
-- [x] environ_get
-- [x] environ_sizes_get
-- [ ] fd_advise
-- [ ] fd_allocate
-- [x] fd_close
-- [x] fd_datasync
-- [x] fd_fdstat_get
-- [ ] fd_fdstat_set_flags
-- [ ] fd_fdstat_set_rights
-- [x] fd_filestat_get
-- [ ] fd_filestat_set_size
-- [ ] fd_filestat_set_times
-- [x] fd_pread
-- [x] fd_prestat_get
-- [x] fd_prestat_dir_name
-- [x] fd_pwrite
-- [x] fd_read
-- [x] fd_readdir
-- [ ] fd_renumber
-- [x] fd_seek
-- [x] fd_sync
-- [x] fd_tell
-- [x] fd_write
-- [x] path_create_directory
-- [x] path_filestat_get
-- [ ] path_filestat_set_times
-- [ ] path_link
-- [x] path_open
-- [x] path_readlink
-- [x] path_remove_directory
-- [x] path_rename
-- [x] path_symlink
-- [x] path_unlink_file
-- [ ] poll_oneoff
-- [x] proc_exit
-- [x] random_get
-- [ ] sched_yield
-- [ ] sock_recv
-- [ ] sock_send
-- [ ] sock_shutdown
+- [x] `args_get`
+- [x] `args_sizes_get`
+- [x] `clock_res_get`
+- [x] `clock_time_get`
+- [x] `environ_get`
+- [x] `environ_sizes_get`
+- [ ] `fd_advise`
+- [ ] `fd_allocate`
+- [x] `fd_close`
+- [x] `fd_datasync`
+- [x] `fd_fdstat_get`
+- [ ] `fd_fdstat_set_flags`
+- [ ] `fd_fdstat_set_rights`
+- [x] `fd_filestat_get`
+- [ ] `fd_filestat_set_size`
+- [ ] `fd_filestat_set_times`
+- [x] `fd_pread`
+- [x] `fd_prestat_get`
+- [x] `fd_prestat_dir_name`
+- [x] `fd_pwrite`
+- [x] `fd_read`
+- [x] `fd_readdir`
+- [ ] `fd_renumber`
+- [x] `fd_seek`
+- [x] `fd_sync`
+- [x] `fd_tell`
+- [x] `fd_write`
+- [x] `path_create_directory`
+- [x] `path_filestat_get`
+- [ ] `path_filestat_set_times`
+- [ ] `path_link`
+- [x] `path_open`
+- [x] `path_readlink`
+- [x] `path_remove_directory`
+- [x] `path_rename`
+- [x] `path_symlink`
+- [x] `path_unlink_file`
+- [ ] `poll_oneoff`
+- [x] `proc_exit`
+- [x] `random_get`
+- [ ] `sched_yield`
+- [ ] `sock_recv`
+- [ ] `sock_send`
+- [ ] `sock_shutdown`
+- [x] `thread-spawn` (from the [threads proposal](https://github.com/webAssembly/wasi-threads))
 
 ## Development
 

examples/threads/Makefile

@@ -0,0 +1,22 @@
+LDFLAGS += -lm -L../../wasi -lw2c2wasi -L../../futex -lw2c2futex
+CFLAGS += -O0 -g
+W2C2 ?= ../../w2c2/w2c2
+
+ifeq ($(OS),Windows_NT)
+	CFLAGS += -DWASM_THREADS_WIN32
+else
+	CFLAGS += -pthread -DWASM_THREADS_PTHREADS
+endif
+
+threads: threads.o main.o
+	$(CC) $^ -o threads $(LDFLAGS)
+
+%.c: src/%.wasm
+	$(W2C2) -g $< $@
+
+%.o: %.c
+	$(CC) -I../../w2c2 -c $(CFLAGS) $< -o $@
+
+.PHONY: clean
+clean:
+	rm -f *.o threads threads.h