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/* Any copyright is dedicated to the Public Domain.
*/
/* A testcase to make sure reading late writes stacks works. */
// Constants from prio.h for nsIFileOutputStream.init
const PR_WRONLY = 0x2;
const PR_CREATE_FILE = 0x8;
const PR_TRUNCATE = 0x20;
const RW_OWNER = parseInt("0600", 8);
const STACK_SUFFIX1 = "stack1.txt";
const STACK_SUFFIX2 = "stack2.txt";
const STACK_BOGUS_SUFFIX = "bogus.txt";
const LATE_WRITE_PREFIX = "Telemetry.LateWriteFinal-";
// The names and IDs don't matter, but the format of the IDs does.
const LOADED_MODULES = {
"4759A7E6993548C89CAF716A67EC242D00": "libtest.so",
F77AF15BB8D6419FA875954B4A3506CA00: "libxul.so",
"1E2F7FB590424E8F93D60BB88D66B8C500": "libc.so",
E4D6D70CC09A63EF8B88D532F867858800: "libmodμles.so",
};
const N_MODULES = Object.keys(LOADED_MODULES).length;
// Format of individual items is [index, offset-in-library].
const STACK1 = [
[0, 0],
[1, 1],
[2, 2],
[3, 3],
];
const STACK2 = [
[0, 0],
[1, 5],
[2, 10],
[3, 15],
];
// XXX The only error checking is for a zero-sized stack.
const STACK_BOGUS = [];
function write_string_to_file(file, contents) {
let ostream = Cc[
"@mozilla.org/network/safe-file-output-stream;1"
].createInstance(Ci.nsIFileOutputStream);
ostream.init(
file,
PR_WRONLY | PR_CREATE_FILE | PR_TRUNCATE,
RW_OWNER,
ostream.DEFER_OPEN
);
var bos = Cc["@mozilla.org/binaryoutputstream;1"].createInstance(
Ci.nsIBinaryOutputStream
);
bos.setOutputStream(ostream);
let utf8 = new TextEncoder().encode(contents);
bos.writeByteArray(utf8);
ostream.QueryInterface(Ci.nsISafeOutputStream).finish();
ostream.close();
}
function construct_file(suffix) {
let profileDirectory = Services.dirsvc.get("ProfD", Ci.nsIFile);
let file = profileDirectory.clone();
file.append(LATE_WRITE_PREFIX + suffix);
return file;
}
function write_late_writes_file(stack, suffix) {
let file = construct_file(suffix);
let contents = N_MODULES + "\n";
for (let id in LOADED_MODULES) {
contents += id + " " + LOADED_MODULES[id] + "\n";
}
contents += stack.length + "\n";
for (let element of stack) {
contents += element[0] + " " + element[1].toString(16) + "\n";
}
write_string_to_file(file, contents);
}
function run_test() {
do_get_profile();
write_late_writes_file(STACK1, STACK_SUFFIX1);
write_late_writes_file(STACK2, STACK_SUFFIX2);
write_late_writes_file(STACK_BOGUS, STACK_BOGUS_SUFFIX);
let lateWrites = Telemetry.lateWrites;
Assert.ok("memoryMap" in lateWrites);
Assert.equal(lateWrites.memoryMap.length, 0);
Assert.ok("stacks" in lateWrites);
Assert.equal(lateWrites.stacks.length, 0);
do_test_pending();
Telemetry.asyncFetchTelemetryData(function () {
actual_test();
});
}
function actual_test() {
Assert.ok(!construct_file(STACK_SUFFIX1).exists());
Assert.ok(!construct_file(STACK_SUFFIX2).exists());
Assert.ok(!construct_file(STACK_BOGUS_SUFFIX).exists());
let lateWrites = Telemetry.lateWrites;
Assert.ok("memoryMap" in lateWrites);
Assert.equal(lateWrites.memoryMap.length, N_MODULES);
for (let id in LOADED_MODULES) {
let matchingLibrary = lateWrites.memoryMap.filter(function (library) {
return library[1] == id;
});
Assert.equal(matchingLibrary.length, 1);
let library = matchingLibrary[0];
let name = library[0];
Assert.equal(LOADED_MODULES[id], name);
}
Assert.ok("stacks" in lateWrites);
Assert.equal(lateWrites.stacks.length, 2);
let uneval_STACKS = [uneval(STACK1), uneval(STACK2)];
let first_stack = lateWrites.stacks[0];
let second_stack = lateWrites.stacks[1];
function stackChecker(canonicalStack) {
let unevalCanonicalStack = uneval(canonicalStack);
return function (obj) {
return unevalCanonicalStack == obj;
};
}
Assert.equal(uneval_STACKS.filter(stackChecker(first_stack)).length, 1);
Assert.equal(uneval_STACKS.filter(stackChecker(second_stack)).length, 1);
do_test_finished();
}