Allowing optional build of a WASM prototype behind a gyp define.

Place a copy of the v8-native-prototype in third_party/wasm.
GYP_DEFINES='v8_wasm=1' gclient runhooks

BUG=None
TEST=None
R=titzer@chromium.org
LOG=N

Review URL: https://codereview.chromium.org/1294543006

Cr-Commit-Position: refs/heads/master@{#30225}

build/features.gypi

@@ -64,6 +64,9 @@
 
     # Set to 1 to enable DCHECKs in release builds.
     'dcheck_always_on%': 0,
+
+    # Set to 1 to enable building with wasm prototype.
+    'v8_wasm%': 0,
   },
   'target_defaults': {
     'conditions': [
@@ -103,6 +106,9 @@
       ['dcheck_always_on!=0', {
         'defines': ['DEBUG',],
       }],
+      ['v8_wasm!=0', {
+        'defines': ['V8_WASM',],
+      }],
     ],  # conditions
     'configurations': {
       'DebugBaseCommon': {

src/d8.cc

@@ -49,6 +49,10 @@
 #include "src/v8.h"
 #endif  // !V8_SHARED
 
+#if defined(V8_WASM)
+#include "src/wasm/wasm-js.h"
+#endif
+
 #if !defined(_WIN32) && !defined(_WIN64)
 #include <unistd.h>  // NOLINT
 #else
@@ -1170,6 +1174,11 @@ Local<ObjectTemplate> Shell::CreateGlobalTemplate(Isolate* isolate) {
           .ToLocalChecked(),
       os_templ);
 
+#if defined(V8_WASM)
+  // Install WASM API.
+  WasmJs::Install(isolate, global_template);
+#endif
+
   return global_template;
 }
 

src/d8.gyp

@@ -98,6 +98,9 @@
             '<(icu_gyp_path):icudata',
           ],
         }],
+        ['v8_wasm!=0', {
+          'include_dirs': ['../third_party/wasm'],
+        }],
       ],
     },
     {

src/flag-definitions.h

@@ -446,6 +446,14 @@ DEFINE_BOOL(turbo_frame_elision, true, "elide frames in TurboFan")
 DEFINE_BOOL(turbo_cache_shared_code, true, "cache context-independent code")
 DEFINE_BOOL(turbo_preserve_shared_code, false, "keep context-independent code")
 
+#if defined(V8_WASM)
+// Flags for native WebAssembly.
+DEFINE_BOOL(trace_wasm_decoder, false, "trace decoding of wasm code")
+DEFINE_BOOL(trace_wasm_compiler, false, "trace compiling of wasm code")
+DEFINE_BOOL(wasm_break_on_decoder_error, false,
+            "debug break when wasm decoder encounters an error")
+#endif
+
 DEFINE_INT(typed_array_max_size_in_heap, 64,
            "threshold for in-heap typed array")
 

test/cctest/cctest.gyp

@@ -276,6 +276,11 @@
         }, {
           'dependencies': ['../../tools/gyp/v8.gyp:v8'],
         }],
+        ['v8_wasm!=0', {
+          'dependencies': [
+            '../../third_party/wasm/test/cctest/wasm/wasm.gyp:wasm_cctest'
+          ],
+        }],
       ],
     },
     {

test/unittests/unittests.gyp

@@ -163,6 +163,11 @@
             ],
           },
         }],
+        ['v8_wasm!=0', {
+          'dependencies': [
+            '../../third_party/wasm/test/unittests/wasm/wasm.gyp:wasm_unittests',
+          ],
+        }],
       ],
     },
   ],

tools/gyp/v8.gyp

@@ -1397,6 +1397,9 @@
             }],
           ],
         }],
+        ['v8_wasm!=0', {
+          'dependencies': ['../../third_party/wasm/src/wasm/wasm.gyp:wasm'],
+        }],
       ],
     },
     {