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authorMatt A. Tobin <email@mattatobin.com>2020-02-22 17:32:39 -0500
committerwolfbeast <mcwerewolf@wolfbeast.com>2020-04-14 12:50:57 +0200
commit36fc5f674ef1a02d1498484c563a7108f4de44ed (patch)
tree120483cd8fc0decd189d5118941a9b23d6156ad5 /dom/heapsnapshot/tests/unit/test_ReadHeapSnapshot_with_allocations.js
parent7b30664f59e65cadb7d5eb2e42591e90a32871f8 (diff)
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Reclassify heapsnapshot and nsJSInspector as not part of devtools
This resolves Issue #316
Diffstat (limited to 'dom/heapsnapshot/tests/unit/test_ReadHeapSnapshot_with_allocations.js')
-rw-r--r--dom/heapsnapshot/tests/unit/test_ReadHeapSnapshot_with_allocations.js36
1 files changed, 36 insertions, 0 deletions
diff --git a/dom/heapsnapshot/tests/unit/test_ReadHeapSnapshot_with_allocations.js b/dom/heapsnapshot/tests/unit/test_ReadHeapSnapshot_with_allocations.js
new file mode 100644
index 000000000..d91f36f56
--- /dev/null
+++ b/dom/heapsnapshot/tests/unit/test_ReadHeapSnapshot_with_allocations.js
@@ -0,0 +1,36 @@
+/* Any copyright is dedicated to the Public Domain.
+ http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Test that we can save a core dump with allocation stacks and read it back
+// into a HeapSnapshot.
+
+if (typeof Debugger != "function") {
+ const { addDebuggerToGlobal } = Cu.import("resource://gre/modules/jsdebugger.jsm", {});
+ addDebuggerToGlobal(this);
+}
+
+function run_test() {
+ // Create a Debugger observing a debuggee's allocations.
+ const debuggee = new Cu.Sandbox(null);
+ const dbg = new Debugger(debuggee);
+ dbg.memory.trackingAllocationSites = true;
+
+ // Allocate some objects in the debuggee that will have their allocation
+ // stacks recorded by the Debugger.
+ debuggee.eval("this.objects = []");
+ for (let i = 0; i < 100; i++) {
+ debuggee.eval("this.objects.push({})");
+ }
+
+ // Now save a snapshot that will include the allocation stacks and read it
+ // back again.
+
+ const filePath = ChromeUtils.saveHeapSnapshot({ runtime: true });
+ ok(true, "Should be able to save a snapshot.");
+
+ const snapshot = ChromeUtils.readHeapSnapshot(filePath);
+ ok(snapshot, "Should be able to read a heap snapshot");
+ ok(snapshot instanceof HeapSnapshot, "Should be an instanceof HeapSnapshot");
+
+ do_test_finished();
+}