deps: cherry-pick 46c4979 from upstream V8

Original commit message:

    Use wider types for max_old_space_size and co.

    Make --max_old_space_size and friends work with values >= 2**31.
    Such values did not work reliably (or sometimes not all) due to
    signed integer overflow in size computations, which is UB.

    Fixes https://github.com/nodejs/node/issues/18786.

    Bug: chromium:814138
    Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
    Change-Id: Ibe23cef2417fd5b4a727022b8b0d4b50f1417182
    Reviewed-on: https://chromium-review.googlesource.com/927063
    Commit-Queue: Ben Noordhuis <info@bnoordhuis.nl>
    Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
    Cr-Commit-Position: refs/heads/master@{#51433}

Refs: https://github.com/v8/v8/commit/46c4979e860a9aaf4444616955e896e70e72afbf

PR-URL: https://github.com/nodejs/node/pull/18453
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Yang Guo <yangguo@chromium.org>
Reviewed-By: Ali Ijaz Sheikh <ofrobots@google.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>

2 files changed, 15 insertions, 15 deletions

diff --git a/deps/v8/src/heap/heap.cc b/deps/v8/src/heap/heap.cc
index 49c2eccb2d..7f965602b8 100644
--- a/deps/v8/src/heap/heap.cc
+++ b/deps/v8/src/heap/heap.cc
@@ -5078,8 +5078,8 @@ bool Heap::ConfigureHeap(size_t max_semi_space_size_in_kb,
 
   // The new space size must be a power of two to support single-bit testing
   // for containment.
-  max_semi_space_size_ = base::bits::RoundUpToPowerOfTwo32(
-      static_cast<uint32_t>(max_semi_space_size_));
+  max_semi_space_size_ = static_cast<size_t>(base::bits::RoundUpToPowerOfTwo64(
+      static_cast<uint64_t>(max_semi_space_size_)));
 
   if (max_semi_space_size_ == kMaxSemiSpaceSizeInKB * KB) {
     // Start with at least 1*MB semi-space on machines with a lot of memory.
diff --git a/deps/v8/src/heap/heap.h b/deps/v8/src/heap/heap.h
index 3d8234f392..7cc65479ca 100644
--- a/deps/v8/src/heap/heap.h
+++ b/deps/v8/src/heap/heap.h
@@ -603,15 +603,15 @@ class Heap {
 #endif
 
   // Semi-space size needs to be a multiple of page size.
-  static const int kMinSemiSpaceSizeInKB =
+  static const size_t kMinSemiSpaceSizeInKB =
       1 * kPointerMultiplier * ((1 << kPageSizeBits) / KB);
-  static const int kMaxSemiSpaceSizeInKB =
+  static const size_t kMaxSemiSpaceSizeInKB =
       16 * kPointerMultiplier * ((1 << kPageSizeBits) / KB);
 
   // The old space size has to be a multiple of Page::kPageSize.
   // Sizes are in MB.
-  static const int kMinOldGenerationSize = 128 * kPointerMultiplier;
-  static const int kMaxOldGenerationSize = 1024 * kPointerMultiplier;
+  static const size_t kMinOldGenerationSize = 128 * kPointerMultiplier;
+  static const size_t kMaxOldGenerationSize = 1024 * kPointerMultiplier;
 
   static const int kTraceRingBufferSize = 512;
   static const int kStacktraceBufferSize = 512;
@@ -1360,10 +1360,10 @@ class Heap {
   size_t MaxOldGenerationSize() { return max_old_generation_size_; }
 
   static size_t ComputeMaxOldGenerationSize(uint64_t physical_memory) {
-    const int old_space_physical_memory_factor = 4;
-    int computed_size =
-        static_cast<int>(physical_memory / i::MB /
-                         old_space_physical_memory_factor * kPointerMultiplier);
+    const size_t old_space_physical_memory_factor = 4;
+    size_t computed_size = static_cast<size_t>(
+        physical_memory / i::MB / old_space_physical_memory_factor *
+        kPointerMultiplier);
     return Max(Min(computed_size, kMaxOldGenerationSize),
                kMinOldGenerationSize);
   }
@@ -1375,11 +1375,11 @@ class Heap {
     uint64_t capped_physical_memory =
         Max(Min(physical_memory, max_physical_memory), min_physical_memory);
     // linearly scale max semi-space size: (X-A)/(B-A)*(D-C)+C
-    int semi_space_size_in_kb =
-        static_cast<int>(((capped_physical_memory - min_physical_memory) *
-                          (kMaxSemiSpaceSizeInKB - kMinSemiSpaceSizeInKB)) /
-                             (max_physical_memory - min_physical_memory) +
-                         kMinSemiSpaceSizeInKB);
+    size_t semi_space_size_in_kb =
+        static_cast<size_t>(((capped_physical_memory - min_physical_memory) *
+                             (kMaxSemiSpaceSizeInKB - kMinSemiSpaceSizeInKB)) /
+                                (max_physical_memory - min_physical_memory) +
+                            kMinSemiSpaceSizeInKB);
     return RoundUp(semi_space_size_in_kb, (1 << kPageSizeBits) / KB);
   }