1 files changed, 47 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Memory-drainAllocationsLog-16.js b/js/src/jit-test/tests/debug/Memory-drainAllocationsLog-16.js
new file mode 100644
index 000000000..b147d6ded
--- /dev/null
+++ b/js/src/jit-test/tests/debug/Memory-drainAllocationsLog-16.js
@@ -0,0 +1,47 @@
+// Test drainAllocationsLog() and constructor names.
+
+const root = newGlobal();
+const dbg = new Debugger();
+const wrappedRoot = dbg.addDebuggee(root);
+
+root.eval(
+  `
+  function Ctor() {}
+
+  var nested = {};
+  nested.Ctor = function () {};
+
+  function makeInstance() {
+    let LexicalCtor = function () {};
+    return new LexicalCtor;
+  }
+
+  function makeObject() {
+    let object = {};
+    return object;
+  }
+
+  this.tests = [
+    { name: "Ctor",                     fn: () => new Ctor             },
+    { name: "nested.Ctor",              fn: () => new nested.Ctor      },
+    { name: "makeInstance/LexicalCtor", fn: () => makeInstance()       },
+    { name: null,                       fn: () => ({})                 },
+    { name: null,                       fn: () => (nested.object = {}) },
+    { name: null,                       fn: () => makeObject()         },
+  ];
+  `
+);
+
+for (let { name, fn } of root.tests) {
+  print(name);
+
+  dbg.memory.trackingAllocationSites = true;
+
+  fn();
+
+  let entries = dbg.memory.drainAllocationsLog();
+  let ctors = entries.map(e => e.constructor);
+  assertEq(ctors.some(ctor => ctor === name), true);
+
+  dbg.memory.trackingAllocationSites = false;
+}