From 5f8de423f190bbb79a62f804151bc24824fa32d8 Mon Sep 17 00:00:00 2001
From: "Matt A. Tobin" <mattatobin@localhost.localdomain>
Date: Fri, 2 Feb 2018 04:16:08 -0500
Subject: Add m-esr52 at 52.6.0

---
 .../tests/saved-stacks/caching-and-frame-count.js  | 38 ++++++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 js/src/jit-test/tests/saved-stacks/caching-and-frame-count.js

(limited to 'js/src/jit-test/tests/saved-stacks/caching-and-frame-count.js')

diff --git a/js/src/jit-test/tests/saved-stacks/caching-and-frame-count.js b/js/src/jit-test/tests/saved-stacks/caching-and-frame-count.js
new file mode 100644
index 000000000..a751d0e3c
--- /dev/null
+++ b/js/src/jit-test/tests/saved-stacks/caching-and-frame-count.js
@@ -0,0 +1,38 @@
+// Test that the SavedFrame caching doesn't mess up counts. Specifically, that
+// if we capture only the first n frames of a stack, we don't cache that stack
+// and return it for when someone else captures another stack and asks for more
+// frames than that last time.
+
+function stackLength(stack) {
+  return stack === null
+    ? 0
+    : 1 + stackLength(stack.parent);
+}
+
+(function f0() {
+  (function f1() {
+    (function f2() {
+      (function f3() {
+        (function f4() {
+          (function f5() {
+            (function f6() {
+              (function f7() {
+                (function f8() {
+                  (function f9() {
+                    const s1 = saveStack(3);
+                    const s2 = saveStack(5);
+                    const s3 = saveStack(0 /* no limit */);
+
+                    assertEq(stackLength(s1), 3);
+                    assertEq(stackLength(s2), 5);
+                    assertEq(stackLength(s3), 11);
+                  }());
+                }());
+              }());
+            }());
+          }());
+        }());
+      }());
+    }());
+  }());
+}());
-- 
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