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Diffstat (limited to '')
-rw-r--r-- | devtools/shared/heapsnapshot/tests/xpcshell/test_ReadHeapSnapshot_with_allocations.js | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/devtools/shared/heapsnapshot/tests/xpcshell/test_ReadHeapSnapshot_with_allocations.js b/devtools/shared/heapsnapshot/tests/xpcshell/test_ReadHeapSnapshot_with_allocations.js new file mode 100644 index 0000000000..273736abcd --- /dev/null +++ b/devtools/shared/heapsnapshot/tests/xpcshell/test_ReadHeapSnapshot_with_allocations.js @@ -0,0 +1,51 @@ +/* Any copyright is dedicated to the Public Domain. + http://creativecommons.org/publicdomain/zero/1.0/ */ +"use strict"; + +// Test that we can save a core dump with allocation stacks and read it back +// into a HeapSnapshot. + +if (typeof Debugger != "function") { + const { addDebuggerToGlobal } = ChromeUtils.importESModule( + "resource://gre/modules/jsdebugger.sys.mjs" + ); + addDebuggerToGlobal(globalThis); +} + +function run_test() { + Services.prefs.setBoolPref( + "security.allow_parent_unrestricted_js_loads", + true + ); + Services.prefs.setBoolPref("security.allow_eval_with_system_principal", true); + Services.prefs.setBoolPref("security.allow_eval_in_parent_process", true); + registerCleanupFunction(() => { + Services.prefs.clearUserPref("security.allow_parent_unrestricted_js_loads"); + Services.prefs.clearUserPref("security.allow_eval_with_system_principal"); + Services.prefs.clearUserPref("security.allow_eval_in_parent_process"); + }); + + // 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(HeapSnapshot.isInstance(snapshot), "Should be an instanceof HeapSnapshot"); + + do_test_finished(); +} |