deps: V8: cherry-pick 9868b2aefa1a

Original commit message:

    Fix SmartOS compilation errors

    This commit resolves compilation errors on SmartOS that
    were found while upgrading Node.js.

    See: nodejs#32831
    Change-Id: Ia2a2e028ba4f5bfd69c050cab4fb4e13af5eefd9
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2191054
    Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
    Reviewed-by: Ulan Degenbaev <ulan@chromium.org>
    Commit-Queue: Ulan Degenbaev <ulan@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#67793}

Refs: v8/v8@9868b2a

PR-URL: nodejs#33579
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Shelley Vohr <codebytere@gmail.com>

common.gypi

@@ -36,7 +36,7 @@
 
     # Reset this number to 0 on major V8 upgrades.
     # Increment by one for each non-official patch applied to deps/v8.
-    'v8_embedder_string': '-node.7',
+    'v8_embedder_string': '-node.8',
 
     ##### V8 defaults for Node.js #####
 

deps/v8/src/base/platform/platform-posix.cc

@@ -970,7 +970,8 @@ void Thread::SetThreadLocal(LocalStorageKey key, void* value) {
 // pthread_getattr_np used below is non portable (hence the _np suffix). We
 // keep this version in POSIX as most Linux-compatible derivatives will
 // support it. MacOS and FreeBSD are different here.
-#if !defined(V8_OS_FREEBSD) && !defined(V8_OS_MACOSX) && !defined(_AIX)
+#if !defined(V8_OS_FREEBSD) && !defined(V8_OS_MACOSX) && !defined(_AIX) && \
+    !defined(V8_OS_SOLARIS)
 
 // static
 void* Stack::GetStackStart() {
@@ -996,7 +997,8 @@ void* Stack::GetStackStart() {
   return nullptr;
 }
 
-#endif  // !defined(V8_OS_FREEBSD) && !defined(V8_OS_MACOSX) && !defined(_AIX)
+#endif  // !defined(V8_OS_FREEBSD) && !defined(V8_OS_MACOSX) &&
+        // !defined(_AIX) && !defined(V8_OS_SOLARIS)
 
 // static
 void* Stack::GetCurrentStackPosition() { return __builtin_frame_address(0); }

deps/v8/src/base/platform/platform-solaris.cc

@@ -65,5 +65,23 @@ void OS::SignalCodeMovingGC() {}
 
 void OS::AdjustSchedulingParams() {}
 
+// static
+void* Stack::GetStackStart() {
+  pthread_attr_t attr;
+  int error;
+  pthread_attr_init(&attr);
+  error = pthread_attr_get_np(pthread_self(), &attr);
+  if (!error) {
+    void* base;
+    size_t size;
+    error = pthread_attr_getstack(&attr, &base, &size);
+    CHECK(!error);
+    pthread_attr_destroy(&attr);
+    return reinterpret_cast<uint8_t*>(base) + size;
+  }
+  pthread_attr_destroy(&attr);
+  return nullptr;
+}
+
 }  // namespace base
 }  // namespace v8