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-rw-r--r--js/src/jit-test/tests/debug/clear-old-analyses-01.js38
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diff --git a/js/src/jit-test/tests/debug/clear-old-analyses-01.js b/js/src/jit-test/tests/debug/clear-old-analyses-01.js
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+++ b/js/src/jit-test/tests/debug/clear-old-analyses-01.js
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+// |jit-test| error:AllDone
+// When we enter debug mode in a compartment, we must throw away all
+// analyses in that compartment (debug mode affects the results of
+// analysis, so they become out of date). This is true even when we would
+// otherwise be retaining jit code and its related data structures for
+// animation timing.
+
+if (typeof gcPreserveCode != "function")
+ throw('AllDone');
+
+var g = newGlobal();
+var dbg = new Debugger;
+
+g.eval("" +
+ function fib(n) {
+ var a = 0, b = 1;
+ while (n-- > 0)
+ b = b+a, a = b-a;
+ return b;
+ });
+
+g.fib(20); // Cause g.fib to be jitted. This creates an analysis with
+ // debug mode off.
+
+gcPreserveCode(); // Tell the gc to preserve JIT code and analyses by
+ // default. A recent call to js::NotifyAnimationActivity
+ // could have a similar effect in real life.
+
+dbg.addDebuggee(g); // Put g in debug mode. This triggers a GC which must
+ // clear all analyses. In the original buggy code, we also
+ // release all of g's scripts' JIT code, leading to a
+ // recompilation the next time it was called.
+
+g.fib(20); // Run g.fib again, causing it to be re-jitted. If the
+ // original analysis is still present, JM will assert,
+ // because it is not in debug mode.
+
+throw('AllDone');