From 4e2e9be6abed3225406b466099e397acc0f914d2 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <email@mattatobin.com>
Date: Sat, 22 Feb 2020 17:32:39 -0500
Subject: Reclassify heapsnapshot and nsJSInspector as not part of devtools

This resolves Issue #316
---
 .../tests/unit/test_HeapSnapshot_takeCensus_10.js  | 68 ++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 dom/heapsnapshot/tests/unit/test_HeapSnapshot_takeCensus_10.js

(limited to 'dom/heapsnapshot/tests/unit/test_HeapSnapshot_takeCensus_10.js')

diff --git a/dom/heapsnapshot/tests/unit/test_HeapSnapshot_takeCensus_10.js b/dom/heapsnapshot/tests/unit/test_HeapSnapshot_takeCensus_10.js
new file mode 100644
index 000000000..a7f987f5a
--- /dev/null
+++ b/dom/heapsnapshot/tests/unit/test_HeapSnapshot_takeCensus_10.js
@@ -0,0 +1,68 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Check byte counts produced by takeCensus.
+//
+// Ported from js/src/jit-test/tests/debug/Memory-take Census-10.js
+
+function run_test() {
+  let g = newGlobal();
+  let dbg = new Debugger(g);
+
+  let sizeOfAM = byteSize(allocationMarker());
+
+  // Allocate a single allocation marker, and check that we can find it.
+  g.eval("var hold = allocationMarker();");
+  let census = saveHeapSnapshotAndTakeCensus(dbg, { breakdown: { by: "objectClass" } });
+  equal(census.AllocationMarker.count, 1);
+  equal(census.AllocationMarker.bytes, sizeOfAM);
+  g.hold = null;
+
+  g.eval(`                                  // 1
+         var objs = [];                     // 2
+         function fnerd() {                 // 3
+           objs.push(allocationMarker());   // 4
+           for (let i = 0; i < 10; i++)     // 5
+             objs.push(allocationMarker()); // 6
+         }                                  // 7
+         `);                                // 8
+
+  dbg.memory.allocationSamplingProbability = 1;
+  dbg.memory.trackingAllocationSites = true;
+  g.fnerd();
+  dbg.memory.trackingAllocationSites = false;
+
+  census = saveHeapSnapshotAndTakeCensus(dbg, {
+    breakdown: { by: "objectClass",
+                 then: { by: "allocationStack" }
+               }
+  });
+
+  let seen = 0;
+  census.AllocationMarker.forEach((v, k) => {
+    equal(k.functionDisplayName, "fnerd");
+    switch (k.line) {
+      case 4:
+        equal(v.count, 1);
+        equal(v.bytes, sizeOfAM);
+        seen++;
+        break;
+
+      case 6:
+        equal(v.count, 10);
+        equal(v.bytes, 10 * sizeOfAM);
+        seen++;
+        break;
+
+      default:
+        dumpn("Unexpected stack:");
+        k.toString().split(/\n/g).forEach(s => dumpn(s));
+        ok(false);
+        break;
+    }
+  });
+
+  equal(seen, 2);
+
+  do_test_finished();
+}
-- 
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