1 files changed, 44 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/gc/incremental-compacting.js b/js/src/jit-test/tests/gc/incremental-compacting.js
new file mode 100644
index 000000000..25f770ae6
--- /dev/null
+++ b/js/src/jit-test/tests/gc/incremental-compacting.js
@@ -0,0 +1,44 @@
+// Exercise incremental compacting GC
+// Run with MOZ_GCTIMER to see the timings
+
+if (!("gcstate" in this && "gczeal" in this))
+    quit();
+
+gczeal(0);
+
+function testCompacting(zoneCount, objectCount, sliceCount)
+{
+    // Allocate objectCount objects in zoneCount zones
+    // On linux64 debug builds we will move them all
+    // Run compacting GC with multiple slices
+
+    var zones = [];
+    for (var i = 0; i < zoneCount; i++) {
+        var zone = newGlobal();
+        evaluate("var objects; " +
+                 "function makeObjectGraph(objectCount) { " +
+                 "    objects = []; " +
+                 "    for (var i = 0; i < objectCount; i++) " +
+                 "        objects.push({ serial: i }); " +
+                "}",
+                 { global: zone });
+        zone.makeObjectGraph(objectCount);
+        zones.push(zone);
+    }
+
+    // Finish any alloc-triggered incremental GC
+    if (gcstate() !== "NotActive")
+        gc();
+
+    startgc(sliceCount, "shrinking");
+    while (gcstate() !== "NotActive") {
+        gcslice(sliceCount);
+    }
+
+    return zones;
+}
+
+testCompacting(1, 100000, 100000);
+testCompacting(2, 100000, 100000);
+testCompacting(4, 50000,  100000);
+testCompacting(2, 100000, 50000);