diff options
Diffstat (limited to 'dom/heapsnapshot/tests/unit/test_ReadHeapSnapshot_with_allocations.js')
-rw-r--r-- | dom/heapsnapshot/tests/unit/test_ReadHeapSnapshot_with_allocations.js | 36 |
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(); +} |