mozilla-central/devtools/shared/heapsnapshot/tests/xpcshell/test_ReadHeapSnapshot_with_allocations.js (file symbol)

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Test Info: Warnings

/* Any copyright is dedicated to the Public Domain.
"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(
);
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();
}