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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:
*/
/* 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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "jsapi-tests/tests.h"
#include "vm/JSContext-inl.h"
using namespace js;
BEGIN_TEST(testIsInsideNursery) {
/* Non-GC things are never inside the nursery. */
CHECK(!cx->nursery().isInside(cx));
CHECK(!cx->nursery().isInside((void*)nullptr));
// Skip test if some part of the nursery is disabled (via env var, for
// example.)
if (!cx->zone()->allocNurseryObjects() ||
!cx->zone()->allocNurseryStrings()) {
return true;
}
JS_GC(cx);
JS::Rooted<JSObject*> object(cx, JS_NewPlainObject(cx));
const char oolstr[] =
"my hands are floppy dark red pieces of liver, large "
"enough to exceed the space of an inline string";
JS::Rooted<JSString*> string(cx, JS_NewStringCopyZ(cx, oolstr));
/* Objects are initially allocated in the nursery. */
CHECK(gc::IsInsideNursery(object));
/* As are strings. */
CHECK(gc::IsInsideNursery(string));
/* And their contents. */
{
JS::AutoCheckCannotGC nogc;
const JS::Latin1Char* strdata =
string->asLinear().nonInlineLatin1Chars(nogc);
CHECK(cx->nursery().isInside(strdata));
}
JS_GC(cx);
/* And are tenured if still live after a GC. */
CHECK(!gc::IsInsideNursery(object));
CHECK(!gc::IsInsideNursery(string));
{
JS::AutoCheckCannotGC nogc;
const JS::Latin1Char* strdata =
string->asLinear().nonInlineLatin1Chars(nogc);
CHECK(!cx->nursery().isInside(strdata));
}
return true;
}
END_TEST(testIsInsideNursery)
BEGIN_TEST(testSemispaceNursery) {
AutoGCParameter enableSemispace(cx, JSGC_SEMISPACE_NURSERY_ENABLED, 1);
JS_GC(cx);
/* Objects are initially allocated in the nursery. */
RootedObject object(cx, JS_NewPlainObject(cx));
CHECK(gc::IsInsideNursery(object));
/* Minor GC with the evict reason tenures them. */
cx->minorGC(JS::GCReason::EVICT_NURSERY);
CHECK(!gc::IsInsideNursery(object));
/* Minor GC with other reasons gives them a second chance. */
object = JS_NewPlainObject(cx);
void* ptr = object;
CHECK(gc::IsInsideNursery(object));
cx->minorGC(JS::GCReason::API);
CHECK(ptr != object);
CHECK(gc::IsInsideNursery(object));
ptr = object;
cx->minorGC(JS::GCReason::API);
CHECK(!gc::IsInsideNursery(object));
CHECK(ptr != object);
CHECK(testReferencesBetweenGenerations(0));
CHECK(testReferencesBetweenGenerations(1));
CHECK(testReferencesBetweenGenerations(2));
return true;
}
bool testReferencesBetweenGenerations(size_t referrerGeneration) {
MOZ_ASSERT(referrerGeneration <= 2);
RootedObject referrer(cx, JS_NewPlainObject(cx));
CHECK(referrer);
CHECK(gc::IsInsideNursery(referrer));
for (size_t i = 0; i < referrerGeneration; i++) {
cx->minorGC(JS::GCReason::API);
}
MOZ_ASSERT(IsInsideNursery(referrer) == (referrerGeneration < 2));
RootedObject object(cx, JS_NewPlainObject(cx));
CHECK(gc::IsInsideNursery(object));
RootedValue value(cx, JS::ObjectValue(*object));
CHECK(JS_DefineProperty(cx, referrer, "prop", value, 0));
CHECK(JS_GetProperty(cx, referrer, "prop", &value));
CHECK(&value.toObject() == object);
CHECK(JS_SetElement(cx, referrer, 0, value));
CHECK(JS_GetElement(cx, referrer, 0, &value));
CHECK(&value.toObject() == object);
cx->minorGC(JS::GCReason::API);
CHECK(gc::IsInsideNursery(object));
CHECK(JS_GetProperty(cx, referrer, "prop", &value));
CHECK(&value.toObject() == object);
CHECK(JS_GetElement(cx, referrer, 0, &value));
CHECK(&value.toObject() == object);
cx->minorGC(JS::GCReason::API);
CHECK(!gc::IsInsideNursery(object));
CHECK(JS_GetProperty(cx, referrer, "prop", &value));
CHECK(&value.toObject() == object);
CHECK(JS_GetElement(cx, referrer, 0, &value));
CHECK(&value.toObject() == object);
return true;
}
END_TEST(testSemispaceNursery)
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