Adding upstream version 1:115.7.0.upstream/1%115.7.0upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 172 insertions, 0 deletions

diff --git a/js/public/WasmFeatures.h b/js/public/WasmFeatures.h
new file mode 100644
index 0000000000..4abd99cd1d
--- /dev/null
+++ b/js/public/WasmFeatures.h
@@ -0,0 +1,172 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ * vim: set ts=8 sts=2 et sw=2 tw=80:
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef js_WasmFeatures_h
+#define js_WasmFeatures_h
+
+// [SMDOC] WebAssembly feature gating
+//
+// Declarative listing of WebAssembly optional features. This macro is used to
+// generate most of the feature gating code in a centralized manner. See
+// 'Adding a feature' below for the exact steps needed to add a new feature.
+//
+// Each feature is either `DEFAULT`, `TENTATIVE`, or `EXPERIMENTAL`:
+//
+// Default features are enabled by default in ContextOptions and in the
+// JS-shell, and are given a `--no-wasm-FEATURE` shell flag to disable.  The
+// `--wasm-FEATURE` flag is rejected.
+//
+// Tentative features are like Default features, but the `--wasm-FEATURE` flag
+// is silently ignored.
+//
+// Experimental features are disabled by default in ContextOptions and in the
+// JS-shell, and are given a `--wasm-FEATURE` shell flag to enable.  The
+// `--no-wasm-FEATURE` flag is silently ignored.
+//
+// The browser pref is `javascript.options.wasm-FEATURE` for default, tentative,
+// and experimental features alike.
+//
+// # Adding a feature
+//
+// 1. Add a configure switch for the feature in js/moz.configure
+// 2. Add a WASM_FEATURE_ENABLED #define below
+// 3. Add the feature to JS_FOR_WASM_FEATURES
+//   a. capitalized name: Used for naming of feature functions, including
+//      wasmFeatureEnabled shell function.
+//   b. lower case name: Used for naming of feature flag variables, including
+//      in wasm::FeatureArgs.
+//   c. compile predicate: Set to WASM_FEATURE_ENABLED
+//   d. compiler predicate: Expression of compilers that this feature depends
+//      on.
+//   e. flag predicate: Expression used to predicate enablement of feature
+//      flag. Useful for disabling a feature when dependent feature is not
+//      enabled or if we are fuzzing.
+//   f. shell flag: The stem of the JS-shell flag. Will be expanded to
+//      --no-wasm-FEATURE or --wasm-FEATURE as explained above.
+//   g. preference name: The stem of the browser preference. Will be expanded
+//      to `javascript.options.wasm-FEATURE`.
+// 4. Add the preference to module/libpref/init/StaticPrefList.yaml
+//   a. Use conditionally compiled flag
+//   b. Set value to 'true' for default features, @IS_NIGHTLY_BUILD@ for
+//      tentative features, and 'false' for experimental features.
+// 5. [fuzzing] Add the feature to gluesmith/src/lib.rs, if wasm-smith has
+//    support for it.
+
+#ifdef ENABLE_WASM_SIMD
+#  define WASM_SIMD_ENABLED 1
+#else
+#  define WASM_SIMD_ENABLED 0
+#endif
+#ifdef ENABLE_WASM_RELAXED_SIMD
+#  define WASM_RELAXED_SIMD_ENABLED 1
+#else
+#  define WASM_RELAXED_SIMD_ENABLED 0
+#endif
+#ifdef ENABLE_WASM_EXTENDED_CONST
+#  define WASM_EXTENDED_CONST_ENABLED 1
+#else
+#  define WASM_EXTENDED_CONST_ENABLED 0
+#endif
+#ifdef ENABLE_WASM_FUNCTION_REFERENCES
+#  define WASM_FUNCTION_REFERENCES_ENABLED 1
+#else
+#  define WASM_FUNCTION_REFERENCES_ENABLED 0
+#endif
+#ifdef ENABLE_WASM_GC
+#  define WASM_GC_ENABLED 1
+#else
+#  define WASM_GC_ENABLED 0
+#endif
+#ifdef ENABLE_WASM_MEMORY64
+#  define WASM_MEMORY64_ENABLED 1
+#else
+#  define WASM_MEMORY64_ENABLED 0
+#endif
+#ifdef ENABLE_WASM_MEMORY_CONTROL
+#  define WASM_MEMORY_CONTROL_ENABLED 1
+#else
+#  define WASM_MEMORY_CONTROL_ENABLED 0
+#endif
+#ifdef ENABLE_WASM_MOZ_INTGEMM
+#  define WASM_MOZ_INTGEMM_ENABLED 1
+#else
+#  define WASM_MOZ_INTGEMM_ENABLED 0
+#endif
+
+// clang-format off
+#define JS_FOR_WASM_FEATURES(DEFAULT, TENTATIVE, EXPERIMENTAL)                \
+  TENTATIVE(/* capitalized name   */ ExtendedConst,                           \
+            /* lower case name    */ extendedConst,                           \
+            /* compile predicate  */ WASM_EXTENDED_CONST_ENABLED,             \
+            /* compiler predicate */ true,                                    \
+            /* flag predicate     */ true,                                    \
+            /* shell flag         */ "extended-const",                        \
+            /* preference name    */ "extended_const")                        \
+  TENTATIVE(                                                                  \
+      /* capitalized name   */ Exceptions,                                    \
+      /* lower case name    */ exceptions,                                    \
+      /* compile predicate  */ true,                                          \
+      /* compiler predicate */ BaselineAvailable(cx) || IonAvailable(cx),     \
+      /* flag predicate     */ true,                                          \
+      /* shell flag         */ "exceptions",                                  \
+      /* preference name    */ "exceptions")                                  \
+  EXPERIMENTAL(/* capitalized name   */ FunctionReferences,                   \
+               /* lower case name    */ functionReferences,                   \
+               /* compile predicate  */ WASM_FUNCTION_REFERENCES_ENABLED,     \
+               /* compiler predicate */ BaselineAvailable(cx) ||              \
+                                        IonAvailable(cx),                     \
+               /* flag predicate     */ true,                                 \
+               /* shell flag         */ "function-references",                \
+               /* preference name    */ "function_references")                \
+  EXPERIMENTAL(/* capitalized name   */ Gc,                                   \
+               /* lower case name    */ gc,                                   \
+               /* compile predicate  */ WASM_GC_ENABLED,                      \
+               /* compiler predicate */ AnyCompilerAvailable(cx),             \
+               /* flag predicate     */ WasmFunctionReferencesFlag(cx),       \
+               /* shell flag         */ "gc",                                 \
+               /* preference name    */ "gc")                                 \
+  TENTATIVE(/* capitalized name   */ RelaxedSimd,                             \
+            /* lower case name    */ v128Relaxed,                             \
+            /* compile predicate  */ WASM_RELAXED_SIMD_ENABLED,               \
+            /* compiler predicate */ AnyCompilerAvailable(cx),                \
+            /* flag predicate     */ js::jit::JitSupportsWasmSimd(),          \
+            /* shell flag         */ "relaxed-simd",                          \
+            /* preference name    */ "relaxed_simd")                          \
+  TENTATIVE(                                                                  \
+      /* capitalized name   */ Memory64,                                      \
+      /* lower case name    */ memory64,                                      \
+      /* compile predicate  */ WASM_MEMORY64_ENABLED,                         \
+      /* compiler predicate */ BaselineAvailable(cx) || IonAvailable(cx),     \
+      /* flag predicate     */ true,                                          \
+      /* shell flag         */ "memory64",                                    \
+      /* preference name    */ "memory64")                                    \
+  EXPERIMENTAL(                                                               \
+      /* capitalized name   */ MemoryControl,                                 \
+      /* lower case name    */ memoryControl,                                 \
+      /* compile predicate  */ WASM_MEMORY_CONTROL_ENABLED,                   \
+      /* compiler predicate */ BaselineAvailable(cx) || IonAvailable(cx),     \
+      /* flag predicate     */ true,                                          \
+      /* shell flag         */ "memory-control",                              \
+      /* preference name    */ "memory_control")                              \
+  EXPERIMENTAL(/* capitalized name   */ MozIntGemm,                           \
+               /* lower case name    */ mozIntGemm,                           \
+               /* compile predicate  */ WASM_MOZ_INTGEMM_ENABLED,             \
+               /* compiler predicate */ BaselineAvailable(cx) ||              \
+                  IonAvailable(cx),                                           \
+               /* flag predicate     */ IsSimdPrivilegedContext(cx),          \
+               /* shell flag         */ "moz-intgemm",                        \
+               /* preference name    */ "moz_intgemm")                        \
+  EXPERIMENTAL(/* capitalized name   */ TestSerialization,                    \
+               /* lower case name    */ testSerialization,                    \
+               /* compile predicate  */ 1,                                    \
+               /* compiler predicate */ IonAvailable(cx),                     \
+               /* flag predicate     */ true,                                 \
+               /* shell flag         */ "test-serialization",                 \
+               /* preference name    */ "test-serialization")
+
+// clang-format on
+
+#endif  // js_WasmFeatures_h