deps: update V8 to 9.4.146.18

PR-URL: https://github.com/nodejs/node/pull/39945
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Jiawen Geng <technicalcute@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>

1 files changed, 34 insertions, 2 deletions

diff --git a/deps/v8/src/codegen/mips64/assembler-mips64.cc b/deps/v8/src/codegen/mips64/assembler-mips64.cc
index 73fbe4ce4d..0379cd65ce 100644
--- a/deps/v8/src/codegen/mips64/assembler-mips64.cc
+++ b/deps/v8/src/codegen/mips64/assembler-mips64.cc
@@ -3736,7 +3736,27 @@ int Assembler::RelocateInternalReference(RelocInfo::Mode rmode, Address pc,
   }
 }
 
+void Assembler::FixOnHeapReferences(bool update_embedded_objects) {
+  if (!update_embedded_objects) return;
+  for (auto p : saved_handles_for_raw_object_ptr_) {
+    Address address = reinterpret_cast<Address>(buffer_->start() + p.first);
+    Handle<HeapObject> object(reinterpret_cast<Address*>(p.second));
+    set_target_value_at(address, object->ptr());
+  }
+}
+
+void Assembler::FixOnHeapReferencesToHandles() {
+  for (auto p : saved_handles_for_raw_object_ptr_) {
+    Address address = reinterpret_cast<Address>(buffer_->start() + p.first);
+    set_target_value_at(address, p.second);
+  }
+  saved_handles_for_raw_object_ptr_.clear();
+}
+
 void Assembler::GrowBuffer() {
+  bool previously_on_heap = buffer_->IsOnHeap();
+  int previous_on_heap_gc_count = OnHeapGCCount();
+
   // Compute new buffer size.
   int old_size = buffer_->size();
   int new_size = std::min(2 * old_size, old_size + 1 * MB);
@@ -3778,6 +3798,16 @@ void Assembler::GrowBuffer() {
       RelocateInternalReference(rmode, it.rinfo()->pc(), pc_delta);
     }
   }
+
+  // Fix on-heap references.
+  if (previously_on_heap) {
+    if (buffer_->IsOnHeap()) {
+      FixOnHeapReferences(previous_on_heap_gc_count != OnHeapGCCount());
+    } else {
+      FixOnHeapReferencesToHandles();
+    }
+  }
+
   DCHECK(!overflow());
 }
 
@@ -3790,7 +3820,8 @@ void Assembler::db(uint8_t data) {
 void Assembler::dd(uint32_t data, RelocInfo::Mode rmode) {
   CheckForEmitInForbiddenSlot();
   if (!RelocInfo::IsNone(rmode)) {
-    DCHECK(RelocInfo::IsDataEmbeddedObject(rmode));
+    DCHECK(RelocInfo::IsDataEmbeddedObject(rmode) ||
+           RelocInfo::IsLiteralConstant(rmode));
     RecordRelocInfo(rmode);
   }
   *reinterpret_cast<uint32_t*>(pc_) = data;
@@ -3800,7 +3831,8 @@ void Assembler::dd(uint32_t data, RelocInfo::Mode rmode) {
 void Assembler::dq(uint64_t data, RelocInfo::Mode rmode) {
   CheckForEmitInForbiddenSlot();
   if (!RelocInfo::IsNone(rmode)) {
-    DCHECK(RelocInfo::IsDataEmbeddedObject(rmode));
+    DCHECK(RelocInfo::IsDataEmbeddedObject(rmode) ||
+           RelocInfo::IsLiteralConstant(rmode));
     RecordRelocInfo(rmode);
   }
   *reinterpret_cast<uint64_t*>(pc_) = data;