5 files changed, 47 insertions, 4 deletions

diff --git a/deps/v8/src/heap/heap.cc b/deps/v8/src/heap/heap.cc
index 5a307ff9e1..d966d979c8 100644
--- a/deps/v8/src/heap/heap.cc
+++ b/deps/v8/src/heap/heap.cc
@@ -1819,6 +1819,8 @@ bool Heap::CollectGarbage(AllocationSpace space,
 
   collector = SelectGarbageCollector(space, gc_reason, &collector_reason);
 
+  current_or_last_garbage_collector_ = collector;
+
   if (collector == GarbageCollector::MARK_COMPACTOR &&
       incremental_marking()->IsMinorMarking()) {
     CollectGarbage(NEW_SPACE, GarbageCollectionReason::kFinalizeMinorMC);
diff --git a/deps/v8/src/heap/heap.h b/deps/v8/src/heap/heap.h
index daca783901..6e270f246d 100644
--- a/deps/v8/src/heap/heap.h
+++ b/deps/v8/src/heap/heap.h
@@ -1455,6 +1455,10 @@ class Heap {
 
   bool is_current_gc_forced() const { return is_current_gc_forced_; }
 
+  GarbageCollector current_or_last_garbage_collector() const {
+    return current_or_last_garbage_collector_;
+  }
+
   // Returns whether the currently in-progress GC should avoid increasing the
   // ages on any objects that live for a set number of collections.
   bool ShouldCurrentGCKeepAgesUnchanged() const {
@@ -2389,6 +2393,8 @@ class Heap {
 
   bool is_current_gc_forced_ = false;
   bool is_current_gc_for_heap_profiler_ = false;
+  GarbageCollector current_or_last_garbage_collector_ =
+      GarbageCollector::SCAVENGER;
 
   ExternalStringTable external_string_table_;
 
diff --git a/deps/v8/src/inspector/v8-heap-profiler-agent-impl.cc b/deps/v8/src/inspector/v8-heap-profiler-agent-impl.cc
index 13dfd69bbe..4e8197fdec 100644
--- a/deps/v8/src/inspector/v8-heap-profiler-agent-impl.cc
+++ b/deps/v8/src/inspector/v8-heap-profiler-agent-impl.cc
@@ -29,6 +29,7 @@ static const char allocationTrackingEnabled[] = "allocationTrackingEnabled";
 static const char samplingHeapProfilerEnabled[] = "samplingHeapProfilerEnabled";
 static const char samplingHeapProfilerInterval[] =
     "samplingHeapProfilerInterval";
+static const char samplingHeapProfilerFlags[] = "samplingHeapProfilerFlags";
 }  // namespace HeapProfilerAgentState
 
 class HeapSnapshotProgress final : public v8::ActivityControl {
@@ -208,7 +209,16 @@ void V8HeapProfilerAgentImpl::restore() {
     double samplingInterval = m_state->doubleProperty(
         HeapProfilerAgentState::samplingHeapProfilerInterval, -1);
     DCHECK_GE(samplingInterval, 0);
-    startSampling(Maybe<double>(samplingInterval));
+    int flags = m_state->integerProperty(
+        HeapProfilerAgentState::samplingHeapProfilerFlags, 0);
+    startSampling(
+        Maybe<double>(samplingInterval),
+        Maybe<bool>(
+            flags &
+            v8::HeapProfiler::kSamplingIncludeObjectsCollectedByMajorGC),
+        Maybe<bool>(
+            flags &
+            v8::HeapProfiler::kSamplingIncludeObjectsCollectedByMinorGC));
   }
 }
 
@@ -387,7 +397,9 @@ void V8HeapProfilerAgentImpl::stopTrackingHeapObjectsInternal() {
 }
 
 Response V8HeapProfilerAgentImpl::startSampling(
-    Maybe<double> samplingInterval) {
+    Maybe<double> samplingInterval,
+    Maybe<bool> includeObjectsCollectedByMajorGC,
+    Maybe<bool> includeObjectsCollectedByMinorGC) {
   v8::HeapProfiler* profiler = m_isolate->GetHeapProfiler();
   if (!profiler) return Response::ServerError("Cannot access v8 heap profiler");
   const unsigned defaultSamplingInterval = 1 << 15;
@@ -400,9 +412,17 @@ Response V8HeapProfilerAgentImpl::startSampling(
                      samplingIntervalValue);
   m_state->setBoolean(HeapProfilerAgentState::samplingHeapProfilerEnabled,
                       true);
+  int flags = v8::HeapProfiler::kSamplingForceGC;
+  if (includeObjectsCollectedByMajorGC.fromMaybe(false)) {
+    flags |= v8::HeapProfiler::kSamplingIncludeObjectsCollectedByMajorGC;
+  }
+  if (includeObjectsCollectedByMinorGC.fromMaybe(false)) {
+    flags |= v8::HeapProfiler::kSamplingIncludeObjectsCollectedByMinorGC;
+  }
+  m_state->setInteger(HeapProfilerAgentState::samplingHeapProfilerFlags, flags);
   profiler->StartSamplingHeapProfiler(
       static_cast<uint64_t>(samplingIntervalValue), 128,
-      v8::HeapProfiler::kSamplingForceGC);
+      static_cast<v8::HeapProfiler::SamplingFlags>(flags));
   return Response::Success();
 }
 
diff --git a/deps/v8/src/inspector/v8-heap-profiler-agent-impl.h b/deps/v8/src/inspector/v8-heap-profiler-agent-impl.h
index 0387a006b8..61c6b6af53 100644
--- a/deps/v8/src/inspector/v8-heap-profiler-agent-impl.h
+++ b/deps/v8/src/inspector/v8-heap-profiler-agent-impl.h
@@ -56,7 +56,9 @@ class V8HeapProfilerAgentImpl : public protocol::HeapProfiler::Backend {
   Response getHeapObjectId(const String16& objectId,
                            String16* heapSnapshotObjectId) override;
 
-  Response startSampling(Maybe<double> samplingInterval) override;
+  Response startSampling(Maybe<double> samplingInterval,
+                         Maybe<bool> includeObjectsCollectedByMajorGC,
+                         Maybe<bool> includeObjectsCollectedByMinorGC) override;
   Response stopSampling(
       std::unique_ptr<protocol::HeapProfiler::SamplingHeapProfile>*) override;
   Response getSamplingProfile(
diff --git a/deps/v8/src/profiler/sampling-heap-profiler.cc b/deps/v8/src/profiler/sampling-heap-profiler.cc
index 45c72ec202..b38d235e98 100644
--- a/deps/v8/src/profiler/sampling-heap-profiler.cc
+++ b/deps/v8/src/profiler/sampling-heap-profiler.cc
@@ -95,6 +95,19 @@ void SamplingHeapProfiler::SampleObject(Address soon_object, size_t size) {
 void SamplingHeapProfiler::OnWeakCallback(
     const WeakCallbackInfo<Sample>& data) {
   Sample* sample = data.GetParameter();
+  Heap* heap = reinterpret_cast<Isolate*>(data.GetIsolate())->heap();
+  bool is_minor_gc =
+      heap->current_or_last_garbage_collector() == GarbageCollector::SCAVENGER;
+  bool should_keep_sample =
+      is_minor_gc
+          ? (sample->profiler->flags_ &
+             v8::HeapProfiler::kSamplingIncludeObjectsCollectedByMinorGC)
+          : (sample->profiler->flags_ &
+             v8::HeapProfiler::kSamplingIncludeObjectsCollectedByMajorGC);
+  if (should_keep_sample) {
+    sample->global.Reset();
+    return;
+  }
   AllocationNode* node = sample->owner;
   DCHECK_GT(node->allocations_[sample->size], 0);
   node->allocations_[sample->size]--;