// Copyright 2018 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef V8_WASM_WASM_FEATURE_FLAGS_H_ #define V8_WASM_WASM_FEATURE_FLAGS_H_ // See https://github.com/WebAssembly/proposals for an overview of current // WebAssembly proposals. // Experimental features (disabled by default). #define FOREACH_WASM_EXPERIMENTAL_FEATURE_FLAG(V) /* (force 80 columns) */ \ /* Exception handling proposal. */ \ /* https://github.com/WebAssembly/exception-handling */ \ /* V8 side owner: clemensb */ \ V(eh, "exception handling opcodes", false) \ \ /* No official proposal (yet?). */ \ /* V8 side owner: clemensb */ \ V(compilation_hints, "compilation hints section", false) \ \ /* GC proposal (early prototype, might change dramatically) */ \ /* Official proposal: https://github.com/WebAssembly/gc */ \ /* Prototype engineering spec: https://bit.ly/3cWcm6Q */ \ /* V8 side owner: jkummerow */ \ V(gc, "garbage collection", false) \ \ /* Typed function references proposal. */ \ /* Official proposal: https://github.com/WebAssembly/function-references */ \ /* V8 side owner: ahaas */ \ V(typed_funcref, "typed function references", false) \ \ /* Memory64 proposal. */ \ /* https://github.com/WebAssembly/memory64 */ \ /* V8 side owner: clemensb */ \ V(memory64, "memory64", false) // ############################################################################# // Staged features (disabled by default, but enabled via --wasm-staging (also // exposed as chrome://flags/#enable-experimental-webassembly-features). Staged // features get limited fuzzer coverage, and should come with their own tests. // They are not run through all fuzzers though and don't get much exposure in // the wild. Staged features do not necessarily be fully stabilized. They should // be shipped with enough lead time to the next branch to allow for // stabilization. #define FOREACH_WASM_STAGING_FEATURE_FLAG(V) /* (force 80 columns) */ \ /* Reference Types, a.k.a. reftypes proposal. */ \ /* https://github.com/WebAssembly/reference-types */ \ /* V8 side owner: ahaas */ \ /* Staged in v7.8. */ \ V(reftypes, "reference type opcodes", false) \ \ /* Tail call / return call proposal. */ \ /* https://github.com/webassembly/tail-call */ \ /* V8 side owner: thibaudm */ \ /* Staged in v8.7 * */ \ V(return_call, "return call opcodes", false) \ \ /* Fixed-width SIMD operations. */ \ /* https://github.com/webassembly/simd */ \ /* V8 side owner: gdeepti, zhin */ \ /* Staged in v8.7 * */ \ V(simd, "SIMD opcodes", false) \ \ /* Threads proposal. */ \ /* https://github.com/webassembly/threads */ \ /* NOTE: This is enabled via chromium flag on desktop systems since v7.4 */ \ /* (see https://crrev.com/c/1487808). ITS: https://groups.google.com/a/ */ \ /* chromium.org/d/msg/blink-dev/tD6np-OG2PU/rcNGROOMFQAJ */ \ /* V8 side owner: gdeepti */ \ V(threads, "thread opcodes", false) \ \ /* Type reflection proposal. */ \ /* https://github.com/webassembly/js-types */ \ /* V8 side owner: ahaas */ \ /* Staged in v7.8. */ \ V(type_reflection, "wasm type reflection in JS", false) // ############################################################################# // Shipped features (enabled by default). Remove the feature flag once they hit // stable and are expected to stay enabled. #define FOREACH_WASM_SHIPPED_FEATURE_FLAG(V) /* (force 80 columns) */ \ /* JS BigInt to wasm i64 integration. */ \ /* https://github.com/WebAssembly/JS-BigInt-integration */ \ /* V8 side owner: ahaas, ssauleau@igalia.com */ \ /* Shipped in v8.5. */ \ /* ITS: https://groups.google.com/a/chromium.org/g/blink-dev/c/ */ \ /* g4QKRUQV1-0/m/jdWjD1uZAAAJ */ \ V(bigint, "JS BigInt support", true) \ \ /* Bulk memory operations. */ \ /* https://github.com/webassembly/bulk-memory-operations */ \ /* V8 side owner: binji */ \ /* Shipped in v7.5. */ \ /* ITS: https://groups.google.com/forum/#!topic/v8-users/zM05lYEBVog */ \ V(bulk_memory, "bulk memory opcodes", true) \ \ /* Multi-value proposal. */ \ /* https://github.com/WebAssembly/multi-value */ \ /* V8 side owner: thibaudm */ \ /* Shipped in v8.6. */ \ /* ITS: https://groups.google.com/g/v8-users/c/pv2E4yFWeF0 */ \ V(mv, "multi-value support", true) // Combination of all available wasm feature flags. #define FOREACH_WASM_FEATURE_FLAG(V) \ FOREACH_WASM_EXPERIMENTAL_FEATURE_FLAG(V) \ FOREACH_WASM_STAGING_FEATURE_FLAG(V) \ FOREACH_WASM_SHIPPED_FEATURE_FLAG(V) #endif // V8_WASM_WASM_FEATURE_FLAGS_H_