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77 lines
2.4 KiB
JavaScript
77 lines
2.4 KiB
JavaScript
/* Any copyright is dedicated to the Public Domain.
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http://creativecommons.org/publicdomain/zero/1.0/ */
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/**
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* Tests if the retrieved profiler data samples always have a (root) node.
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* If this ever changes, the |ThreadNode.prototype.insert| function in
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* devtools/client/performance/modules/logic/tree-model.js will have to be changed.
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*/
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const WAIT_TIME = 1000; // ms
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const { PerformanceFront } = require("devtools/server/actors/performance");
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add_task(function*() {
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let doc = yield addTab(MAIN_DOMAIN + "doc_perf.html");
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initDebuggerServer();
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let client = new DebuggerClient(DebuggerServer.connectPipe());
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let form = yield connectDebuggerClient(client);
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let front = PerformanceFront(client, form);
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yield front.connect();
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let rec = yield front.startRecording();
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busyWait(WAIT_TIME); // allow the profiler module to sample some cpu activity
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yield front.stopRecording(rec);
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let profile = rec.getProfile();
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let sampleCount = 0;
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for (let thread of profile.threads) {
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info("Checking thread: " + thread.name);
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for (let sample of thread.samples.data) {
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sampleCount++;
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let stack = getInflatedStackLocations(thread, sample);
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if (stack[0] != "(root)") {
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ok(false, "The sample " + stack.toSource() + " doesn't have a root node.");
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}
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}
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}
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ok(sampleCount > 0,
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"At least some samples have been iterated over, checking for root nodes.");
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yield front.destroy();
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yield closeDebuggerClient(client);
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gBrowser.removeCurrentTab();
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});
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/**
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* Inflate a particular sample's stack and return an array of strings.
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*/
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function getInflatedStackLocations(thread, sample) {
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let stackTable = thread.stackTable;
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let frameTable = thread.frameTable;
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let stringTable = thread.stringTable;
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let SAMPLE_STACK_SLOT = thread.samples.schema.stack;
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let STACK_PREFIX_SLOT = stackTable.schema.prefix;
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let STACK_FRAME_SLOT = stackTable.schema.frame;
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let FRAME_LOCATION_SLOT = frameTable.schema.location;
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// Build the stack from the raw data and accumulate the locations in
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// an array.
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let stackIndex = sample[SAMPLE_STACK_SLOT];
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let locations = [];
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while (stackIndex !== null) {
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let stackEntry = stackTable.data[stackIndex];
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let frame = frameTable.data[stackEntry[STACK_FRAME_SLOT]];
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locations.push(stringTable[frame[FRAME_LOCATION_SLOT]]);
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stackIndex = stackEntry[STACK_PREFIX_SLOT];
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}
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// The profiler tree is inverted, so reverse the array.
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return locations.reverse();
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}
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