js/src/jsapi-tests/testGCChunkPool.cpp
author Jon Coppeard <jcoppeard@mozilla.com>
Mon, 14 Jan 2019 11:02:35 +0000
changeset 453704 1cebf4f5c850
parent 448963 66eb1f485c1a
permissions -rw-r--r--
Bug 1519397 - Factor GC locking RAII classes out of vm/Runtime.h r=pbone

/* -*- 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 "mozilla/Move.h"

#include "gc/GCLock.h"
#include "gc/GCRuntime.h"
#include "gc/Heap.h"

#include "jsapi-tests/tests.h"

BEGIN_TEST(testGCChunkPool) {
  const int N = 10;
  js::gc::ChunkPool pool;

  // Create.
  for (int i = 0; i < N; ++i) {
    js::gc::Chunk* chunk = js::gc::Chunk::allocate(cx->runtime());
    CHECK(chunk);
    pool.push(chunk);
  }
  MOZ_ASSERT(pool.verify());

  // Iterate.
  uint32_t i = 0;
  for (js::gc::ChunkPool::Iter iter(pool); !iter.done(); iter.next(), ++i) {
    CHECK(iter.get());
  }
  CHECK(i == pool.count());
  MOZ_ASSERT(pool.verify());

  // Push/Pop.
  for (int i = 0; i < N; ++i) {
    js::gc::Chunk* chunkA = pool.pop();
    js::gc::Chunk* chunkB = pool.pop();
    js::gc::Chunk* chunkC = pool.pop();
    pool.push(chunkA);
    pool.push(chunkB);
    pool.push(chunkC);
  }
  MOZ_ASSERT(pool.verify());

  // Remove.
  js::gc::Chunk* chunk = nullptr;
  int offset = N / 2;
  for (js::gc::ChunkPool::Iter iter(pool); !iter.done();
       iter.next(), --offset) {
    if (offset == 0) {
      chunk = pool.remove(iter.get());
      break;
    }
  }
  CHECK(chunk);
  MOZ_ASSERT(!pool.contains(chunk));
  MOZ_ASSERT(pool.verify());
  pool.push(chunk);

  // Destruct.
  js::AutoLockGC lock(cx->runtime());
  for (js::gc::ChunkPool::Iter iter(pool); !iter.done();) {
    js::gc::Chunk* chunk = iter.get();
    iter.next();
    pool.remove(chunk);
    js::gc::UnmapPages(chunk, js::gc::ChunkSize);
  }

  return true;
}
END_TEST(testGCChunkPool)