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-rw-r--r--js/src/jit-test/tests/debug/Memory-takeCensus-04.js26
1 files changed, 26 insertions, 0 deletions
diff --git a/js/src/jit-test/tests/debug/Memory-takeCensus-04.js b/js/src/jit-test/tests/debug/Memory-takeCensus-04.js
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index 000000000..daef676dd
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+++ b/js/src/jit-test/tests/debug/Memory-takeCensus-04.js
@@ -0,0 +1,26 @@
+// Test that Debugger.Memory.prototype.takeCensus finds GC roots that are on the
+// stack.
+
+var g = newGlobal();
+var dbg = new Debugger(g);
+
+g.eval(`
+ function withAllocationMarkerOnStack(f) {
+ (function () {
+ var onStack = allocationMarker();
+ f();
+ }())
+ }
+`);
+
+assertEq("AllocationMarker" in dbg.memory.takeCensus().objects, false,
+ "There shouldn't exist any allocation markers in the census.");
+
+var allocationMarkerCount;
+g.withAllocationMarkerOnStack(() => {
+ allocationMarkerCount = dbg.memory.takeCensus().objects.AllocationMarker.count;
+});
+
+assertEq(allocationMarkerCount, 1,
+ "Should have one allocation marker in the census, because there " +
+ "was one on the stack.");