From 77a950aac417ba5e9bf1a48b0ec8934291376a8c Mon Sep 17 00:00:00 2001
From: Mathias Lafeldt <mathias.lafeldt@gmail.com>
Date: Mon, 5 Jun 2023 11:22:32 +0200
Subject: [PATCH] feat(runtime): support creating workers using custom v8
 params (#19339)

In order to limit the memory usage of isolates via heap_limits.
---
 cli/worker.rs     | 1 +
 runtime/worker.rs | 6 ++++++
 2 files changed, 7 insertions(+)

diff --git a/cli/worker.rs b/cli/worker.rs
index 6edf427ea572f4..b8bb6e941643e6 100644
--- a/cli/worker.rs
+++ b/cli/worker.rs
@@ -449,6 +449,7 @@ impl CliMainWorkerFactory {
       },
       extensions,
       startup_snapshot: Some(crate::js::deno_isolate_init()),
+      create_params: None,
       unsafely_ignore_certificate_errors: shared
         .options
         .unsafely_ignore_certificate_errors
diff --git a/runtime/worker.rs b/runtime/worker.rs
index 0e62decb46f1b9..10375818d01d2a 100644
--- a/runtime/worker.rs
+++ b/runtime/worker.rs
@@ -95,6 +95,10 @@ pub struct WorkerOptions {
 
   /// V8 snapshot that should be loaded on startup.
   pub startup_snapshot: Option<Snapshot>,
+
+  /// Optional isolate creation parameters, such as heap limits.
+  pub create_params: Option<v8::CreateParams>,
+
   pub unsafely_ignore_certificate_errors: Option<Vec<String>>,
   pub root_cert_store_provider: Option<Arc<dyn RootCertStoreProvider>>,
   pub seed: Option<u64>,
@@ -181,6 +185,7 @@ impl Default for WorkerOptions {
       blob_store: Default::default(),
       extensions: Default::default(),
       startup_snapshot: Default::default(),
+      create_params: Default::default(),
       bootstrap: Default::default(),
       stdio: Default::default(),
     }
@@ -321,6 +326,7 @@ impl MainWorker {
     let mut js_runtime = JsRuntime::new(RuntimeOptions {
       module_loader: Some(options.module_loader.clone()),
       startup_snapshot: Some(startup_snapshot),
+      create_params: options.create_params,
       source_map_getter: options.source_map_getter,
       get_error_class_fn: options.get_error_class_fn,
       shared_array_buffer_store: options.shared_array_buffer_store.clone(),