src: force gc for flaky (deadlock) tests

src/node_options.cc

@@ -1166,6 +1166,10 @@ PerProcessOptionsParser::PerProcessOptionsParser(
             "force FIPS crypto (cannot be disabled)",
             &PerProcessOptions::force_fips_crypto,
             kAllowedInEnvvar);
+  AddOption("--force-gc-for-test",
+            "",
+            &PerProcessOptions::force_gc_for_test,
+            kAllowedInEnvvar);
   AddOption("--secure-heap",
             "total size of the OpenSSL secure heap",
             &PerProcessOptions::secure_heap,

src/node_options.h

@@ -321,6 +321,7 @@ class PerProcessOptions : public Options {
   std::string snapshot_blob;
 
   std::vector<std::string> security_reverts;
+  bool force_gc_for_test = false;
   bool print_bash_completion = false;
   bool print_help = false;
   bool print_v8_help = false;

src/node_platform.cc

@@ -464,6 +464,11 @@ void NodePlatform::DrainTasks(Isolate* isolate) {
   if (!per_isolate) return;
 
   do {
+    if (per_process::cli_options->force_gc_for_test) {
+      isolate->RequestGarbageCollectionForTesting(
+          Isolate::GarbageCollectionType::kFullGarbageCollection);
+    }
+
     // Worker tasks aren't associated with an Isolate.
     worker_thread_task_runner_->BlockingDrain();
   } while (per_isolate->FlushForegroundTasksInternal());