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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim: set ts=8 sts=2 et sw=2 tw=80:
*
* Tests the stack-based instrumentation profiler on a JSRuntime
*/
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
#include "mozilla/Atomics.h"
#include "js/CallAndConstruct.h"
#include "js/ContextOptions.h"
#include "js/GlobalObject.h"
#include "js/PropertySpec.h"
#include "jsapi-tests/tests.h"
#include "vm/JSContext.h"
MOZ_RUNINIT static ProfilingStack profilingStack;
static uint32_t peakStackPointer = 0;
static void reset(JSContext* cx) {
profilingStack.stackPointer = 0;
cx->runtime()->geckoProfiler().stringsReset();
cx->runtime()->geckoProfiler().enableSlowAssertions(true);
js::EnableContextProfilingStack(cx, true);
}
static const JSClass ptestClass = {
"Prof",
0,
};
static bool test_fn(JSContext* cx, unsigned argc, JS::Value* vp) {
peakStackPointer = profilingStack.stackPointer;
return true;
}
static bool test_fn2(JSContext* cx, unsigned argc, JS::Value* vp) {
JS::RootedValue r(cx);
JS::RootedObject global(cx, JS::CurrentGlobalOrNull(cx));
return JS_CallFunctionName(cx, global, "d", JS::HandleValueArray::empty(),
&r);
}
static bool enable(JSContext* cx, unsigned argc, JS::Value* vp) {
js::EnableContextProfilingStack(cx, true);
return true;
}
static bool disable(JSContext* cx, unsigned argc, JS::Value* vp) {
js::EnableContextProfilingStack(cx, false);
return true;
}
static bool Prof(JSContext* cx, unsigned argc, JS::Value* vp) {
JS::CallArgs args = JS::CallArgsFromVp(argc, vp);
JSObject* obj = JS_NewObjectForConstructor(cx, &ptestClass, args);
if (!obj) {
return false;
}
args.rval().setObject(*obj);
return true;
}
static const JSFunctionSpec ptestFunctions[] = {
JS_FN("test_fn", test_fn, 0, 0),
JS_FN("test_fn2", test_fn2, 0, 0),
JS_FN("enable", enable, 0, 0),
JS_FN("disable", disable, 0, 0),
JS_FS_END,
};
static JSObject* initialize(JSContext* cx) {
js::SetContextProfilingStack(cx, &profilingStack);
JS::RootedObject global(cx, JS::CurrentGlobalOrNull(cx));
return JS_InitClass(cx, global, nullptr, nullptr, "Prof", Prof, 0, nullptr,
ptestFunctions, nullptr, nullptr);
}
BEGIN_TEST(testProfileStrings_isCalledWithInterpreter) {
CHECK(initialize(cx));
EXEC("function g() { var p = new Prof(); p.test_fn(); }");
EXEC("function f() { g(); }");
EXEC("function e() { f(); }");
EXEC("function d() { e(); }");
EXEC("function c() { d(); }");
EXEC("function b() { c(); }");
EXEC("function a() { b(); }");
EXEC("function check() { var p = new Prof(); p.test_fn(); a(); }");
EXEC("function check2() { var p = new Prof(); p.test_fn2(); }");
reset(cx);
{
JS::RootedValue rval(cx);
/* Make sure the stack resets and we have an entry for each stack */
CHECK(JS_CallFunctionName(cx, global, "check",
JS::HandleValueArray::empty(), &rval));
CHECK(profilingStack.stackPointer == 0);
CHECK(peakStackPointer >= 8);
CHECK(cx->runtime()->geckoProfiler().stringsCount() == 8);
/* Make sure the stack resets and we added no new entries */
peakStackPointer = 0;
CHECK(JS_CallFunctionName(cx, global, "check",
JS::HandleValueArray::empty(), &rval));
CHECK(profilingStack.stackPointer == 0);
CHECK(peakStackPointer >= 8);
CHECK(cx->runtime()->geckoProfiler().stringsCount() == 8);
}
reset(cx);
{
JS::RootedValue rval(cx);
CHECK(JS_CallFunctionName(cx, global, "check2",
JS::HandleValueArray::empty(), &rval));
CHECK(cx->runtime()->geckoProfiler().stringsCount() == 5);
CHECK(peakStackPointer >= 6);
CHECK(profilingStack.stackPointer == 0);
}
return true;
}
END_TEST(testProfileStrings_isCalledWithInterpreter)
BEGIN_TEST(testProfileStrings_isCalledWithJIT) {
CHECK(initialize(cx));
EXEC("function g() { var p = new Prof(); p.test_fn(); }");
EXEC("function f() { g(); }");
EXEC("function e() { f(); }");
EXEC("function d() { e(); }");
EXEC("function c() { d(); }");
EXEC("function b() { c(); }");
EXEC("function a() { b(); }");
EXEC("function check() { var p = new Prof(); p.test_fn(); a(); }");
EXEC("function check2() { var p = new Prof(); p.test_fn2(); }");
reset(cx);
{
JS::RootedValue rval(cx);
/* Make sure the stack resets and we have an entry for each stack */
CHECK(JS_CallFunctionName(cx, global, "check",
JS::HandleValueArray::empty(), &rval));
CHECK(profilingStack.stackPointer == 0);
CHECK(peakStackPointer >= 8);
/* Make sure the stack resets and we added no new entries */
uint32_t cnt = cx->runtime()->geckoProfiler().stringsCount();
peakStackPointer = 0;
CHECK(JS_CallFunctionName(cx, global, "check",
JS::HandleValueArray::empty(), &rval));
CHECK(profilingStack.stackPointer == 0);
CHECK(cx->runtime()->geckoProfiler().stringsCount() == cnt);
CHECK(peakStackPointer >= 8);
}
return true;
}
END_TEST(testProfileStrings_isCalledWithJIT)
BEGIN_TEST(testProfileStrings_isCalledWhenError) {
CHECK(initialize(cx));
EXEC("function check2() { throw 'a'; }");
reset(cx);
{
JS::RootedValue rval(cx);
/* Make sure the stack resets and we have an entry for each stack */
bool ok = JS_CallFunctionName(cx, global, "check2",
JS::HandleValueArray::empty(), &rval);
CHECK(!ok);
CHECK(profilingStack.stackPointer == 0);
CHECK(cx->runtime()->geckoProfiler().stringsCount() == 1);
JS_ClearPendingException(cx);
}
return true;
}
END_TEST(testProfileStrings_isCalledWhenError)
BEGIN_TEST(testProfileStrings_worksWhenEnabledOnTheFly) {
CHECK(initialize(cx));
EXEC("function b(p) { p.test_fn(); }");
EXEC("function a() { var p = new Prof(); p.enable(); b(p); }");
reset(cx);
js::EnableContextProfilingStack(cx, false);
{
/* enable it in the middle of JS and make sure things check out */
JS::RootedValue rval(cx);
JS_CallFunctionName(cx, global, "a", JS::HandleValueArray::empty(), &rval);
CHECK(profilingStack.stackPointer == 0);
CHECK(peakStackPointer >= 1);
CHECK(cx->runtime()->geckoProfiler().stringsCount() == 1);
}
EXEC("function d(p) { p.disable(); }");
EXEC("function c() { var p = new Prof(); d(p); }");
reset(cx);
{
/* now disable in the middle of js */
JS::RootedValue rval(cx);
JS_CallFunctionName(cx, global, "c", JS::HandleValueArray::empty(), &rval);
CHECK(profilingStack.stackPointer == 0);
}
EXEC("function e() { var p = new Prof(); d(p); p.enable(); b(p); }");
reset(cx);
{
/* now disable in the middle of js, but re-enable before final exit */
JS::RootedValue rval(cx);
JS_CallFunctionName(cx, global, "e", JS::HandleValueArray::empty(), &rval);
CHECK(profilingStack.stackPointer == 0);
CHECK(peakStackPointer >= 3);
}
EXEC("function h() { }");
EXEC("function g(p) { p.disable(); for (var i = 0; i < 100; i++) i++; }");
EXEC("function f() { g(new Prof()); }");
reset(cx);
cx->runtime()->geckoProfiler().enableSlowAssertions(false);
{
JS::RootedValue rval(cx);
/* disable, and make sure that if we try to re-enter the JIT the pop
* will still happen */
JS_CallFunctionName(cx, global, "f", JS::HandleValueArray::empty(), &rval);
CHECK(profilingStack.stackPointer == 0);
}
return true;
}
END_TEST(testProfileStrings_worksWhenEnabledOnTheFly)