Update upstream source from tag 'upstream/6.0.0'master

Update to upstream version '6.0.0'
with Debian dir 5604a80ec1c96ca76f25f40d78e6ef855abec322

1 files changed, 0 insertions, 426 deletions

diff --git a/src/mongo/util/shared_buffer_test.cpp b/src/mongo/util/shared_buffer_test.cpp
deleted file mode 100644
index 7d0eefac43d..00000000000
--- a/src/mongo/util/shared_buffer_test.cpp
+++ /dev/null
@@ -1,426 +0,0 @@
-/**
- *    Copyright (C) 2019-present MongoDB, Inc.
- *
- *    This program is free software: you can redistribute it and/or modify
- *    it under the terms of the Server Side Public License, version 1,
- *    as published by MongoDB, Inc.
- *
- *    This program is distributed in the hope that it will be useful,
- *    but WITHOUT ANY WARRANTY; without even the implied warranty of
- *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *    Server Side Public License for more details.
- *
- *    You should have received a copy of the Server Side Public License
- *    along with this program. If not, see
- *    <http://www.mongodb.com/licensing/server-side-public-license>.
- *
- *    As a special exception, the copyright holders give permission to link the
- *    code of portions of this program with the OpenSSL library under certain
- *    conditions as described in each individual source file and distribute
- *    linked combinations including the program with the OpenSSL library. You
- *    must comply with the Server Side Public License in all respects for
- *    all of the code used other than as permitted herein. If you modify file(s)
- *    with this exception, you may extend this exception to your version of the
- *    file(s), but you are not obligated to do so. If you do not wish to do so,
- *    delete this exception statement from your version. If you delete this
- *    exception statement from all source files in the program, then also delete
- *    it in the license file.
- */
-
-#include "mongo/platform/basic.h"
-
-#include "mongo/base/string_data.h"
-#include "mongo/util/shared_buffer.h"
-#include "mongo/util/shared_buffer_fragment.h"
-
-#include "mongo/unittest/unittest.h"
-
-namespace mongo {
-namespace {
-
-using SharedBufferTest = unittest::Test;
-
-TEST_F(SharedBufferTest, ReallocOrCopyNull) {
-    SharedBuffer buf;
-    ASSERT_EQ(buf.capacity(), 0u);
-    ASSERT(!buf);
-    ASSERT(!buf.isShared());
-    buf.reallocOrCopy(10);
-    ASSERT(buf);
-    ASSERT(!buf.isShared());
-    ASSERT_EQ(buf.capacity(), 10u);
-}
-
-TEST_F(SharedBufferTest, ReallocOrCopyNullShared) {
-    // null SharedBuffers are never considered "shared", even when copied.
-    SharedBuffer buf;
-    const SharedBuffer sharer = buf;
-    ASSERT_EQ(buf.capacity(), 0u);
-    ASSERT(!buf);
-    ASSERT(!buf.isShared());
-    buf.reallocOrCopy(10);
-    ASSERT(buf);
-    ASSERT(!buf.isShared());
-    ASSERT_EQ(buf.capacity(), 10u);
-    ASSERT_EQ(sharer.capacity(), 0u);
-}
-
-SharedBuffer makeBuffer() {
-    SharedBuffer buf = SharedBuffer::allocate(4);
-    memcpy(buf.get(), "foo", 4);
-    return buf;
-}
-
-TEST_F(SharedBufferTest, ReallocOrCopyGrow) {
-    SharedBuffer buf = makeBuffer();
-    ASSERT_EQ(buf.capacity(), 4u);
-    ASSERT(buf);
-    ASSERT(!buf.isShared());
-    buf.reallocOrCopy(10);
-    ASSERT(buf);
-    ASSERT(!buf.isShared());
-    ASSERT_EQ(buf.capacity(), 10u);
-    ASSERT_EQ("foo"_sd, buf.get());
-}
-
-TEST_F(SharedBufferTest, ReallocOrCopyGrowShared) {
-    SharedBuffer buf = makeBuffer();
-    const SharedBuffer sharer = buf;
-    ASSERT_EQ(buf.capacity(), 4u);
-    ASSERT(buf);
-    ASSERT(buf.isShared());
-    buf.reallocOrCopy(10);
-    ASSERT(buf);
-    ASSERT(!buf.isShared());
-    ASSERT_EQ(buf.capacity(), 10u);
-    ASSERT_EQ(sharer.capacity(), 4u);
-    ASSERT_EQ("foo"_sd, buf.get());
-    ASSERT_EQ("foo"_sd, sharer.get());
-    ASSERT_NE(buf.get(), sharer.get());
-}
-
-TEST_F(SharedBufferTest, ReallocOrCopyShrink) {
-    SharedBuffer buf = makeBuffer();
-    ASSERT_EQ(buf.capacity(), 4u);
-    ASSERT(buf);
-    ASSERT(!buf.isShared());
-    // The buffer is already at least 1 byte.
-    buf.reallocOrCopy(1);
-    ASSERT(buf);
-    // We copy it anyway.
-    ASSERT(!buf.isShared());
-    ASSERT_EQ(buf.capacity(), 1u);
-    ASSERT_EQ('f', buf.get()[0]);
-}
-
-TEST_F(SharedBufferTest, ReallocOrCopyShrinkShared) {
-    SharedBuffer buf = makeBuffer();
-    const SharedBuffer sharer = buf;
-    ASSERT_EQ(buf.capacity(), 4u);
-    ASSERT(buf);
-    ASSERT(buf.isShared());
-    // The buffer is already at least 1 byte.
-    buf.reallocOrCopy(1);
-    ASSERT(buf);
-    // We copy it anyway.
-    ASSERT(!buf.isShared());
-    ASSERT_EQ(buf.capacity(), 1u);
-    ASSERT_EQ(sharer.capacity(), 4u);
-    ASSERT_EQ('f', buf.get()[0]);
-    ASSERT_EQ("foo"_sd, sharer.get());
-    ASSERT_NE(buf.get(), sharer.get());
-}
-
-TEST_F(SharedBufferTest, SharedBufferFragmentBuilder) {
-    constexpr size_t kBlockSize = 16;
-    SharedBufferFragmentBuilder builder(kBlockSize);
-
-    auto verifyFragment = [](const SharedBufferFragment& fragment, uint8_t expected) {
-        for (size_t i = 0; i < fragment.size(); ++i)
-            ASSERT(memcmp(fragment.get() + i, &expected, 1) == 0);
-    };
-
-    builder.start(kBlockSize / 2);
-    ASSERT_EQ(builder.capacity(), kBlockSize);
-    uint8_t one = 1;
-    memset(builder.get(), one, kBlockSize / 2);
-    auto fragment1 = builder.finish(kBlockSize / 2);
-    ASSERT_EQ(fragment1.size(), kBlockSize / 2);
-    verifyFragment(fragment1, one);
-
-    builder.start(kBlockSize / 2);
-    ASSERT_EQ(builder.capacity(), kBlockSize / 2);
-    // We can use less than we ask for
-    uint8_t two = 2;
-    memset(builder.get(), two, kBlockSize / 4);
-    auto fragment2 = builder.finish(kBlockSize / 4);
-    ASSERT_EQ(fragment2.size(), kBlockSize / 4);
-    // Buffers should not overlap and be next to each other
-    ASSERT_EQ(fragment1.get() + fragment1.size(), fragment2.get());
-    verifyFragment(fragment2, two);
-
-    // Verify that anything written is transfered when we grow
-    builder.start(builder.capacity());
-    ASSERT_EQ(builder.capacity(), kBlockSize / 4);
-    uint8_t three = 3;
-    size_t written = kBlockSize / 4;
-    // Write current capacity
-    memset(builder.get(), three, written);
-    builder.grow(kBlockSize);
-    // Write the rest
-    memset(builder.get() + written, three, builder.capacity() - written);
-    auto fragment3 = builder.finish(kBlockSize);
-    for (size_t i = 0; i < (kBlockSize / 4); ++i)
-        ASSERT(memcmp(fragment3.get() + i, &three, 1) == 0);
-    ASSERT_EQ(builder.capacity(), kBlockSize);
-    verifyFragment(fragment3, three);
-
-    builder.start(builder.capacity());
-    auto ptr = builder.get();
-    builder.discard();
-    builder.start(builder.capacity());
-    ASSERT_EQ(builder.get(), ptr);
-
-    // No buffers should have been overwritten by others
-    verifyFragment(fragment1, one);
-    verifyFragment(fragment2, two);
-    verifyFragment(fragment3, three);
-}
-
-TEST_F(SharedBufferTest, ManualFreeSharedBufferFragmentMemUsage1) {
-    constexpr size_t kBlockSize = 16;
-    SharedBufferFragmentBuilder builder(kBlockSize,
-                                        SharedBufferFragmentBuilder::DoubleGrowStrategy(
-                                            SharedBufferFragmentBuilder::kDefaultMaxBlockSize));
-
-    {
-        builder.start(kBlockSize / 2);
-        ASSERT_EQ(kBlockSize, builder.capacity());
-        auto fragment1 = builder.finish(kBlockSize / 2);
-        ASSERT_EQ(kBlockSize / 2, fragment1.size());
-        ASSERT_EQ(kBlockSize, builder.memUsage());
-
-        builder.start(kBlockSize / 2);
-        ASSERT_EQ(kBlockSize / 2, builder.capacity());
-        auto fragment2 = builder.finish(kBlockSize / 2);
-        ASSERT_EQ(kBlockSize / 2, fragment2.size());
-        ASSERT_EQ(kBlockSize, builder.memUsage());
-    }
-
-    ASSERT_EQ(kBlockSize, builder.memUsage());
-    builder.freeUnused();
-    // At a mimimum we will have a buffer of at least one block size in use.
-    ASSERT_EQ(kBlockSize, builder.memUsage());
-}
-
-TEST_F(SharedBufferTest, ManualFreeSharedBufferFragmentMemUsage2) {
-    constexpr size_t kBlockSize = 16;
-    SharedBufferFragmentBuilder builder(kBlockSize,
-                                        SharedBufferFragmentBuilder::DoubleGrowStrategy(
-                                            SharedBufferFragmentBuilder::kDefaultMaxBlockSize));
-
-    // This test allocates fragments on a block boundaries.
-    {
-        builder.start(kBlockSize);
-        ASSERT_EQ(kBlockSize, builder.capacity());
-        auto fragment1 = builder.finish(kBlockSize);
-        ASSERT_EQ(kBlockSize, fragment1.size());
-        ASSERT_EQ(kBlockSize, builder.memUsage());
-
-        builder.start(kBlockSize);
-        // Second buffer is allocated with twice the capacity.
-        ASSERT_EQ(2 * kBlockSize, builder.capacity());
-        auto fragment2 = builder.finish(kBlockSize);
-        ASSERT_EQ(kBlockSize, fragment2.size());
-        ASSERT_EQ(3 * kBlockSize, builder.memUsage());
-    }
-
-    ASSERT_EQ(3 * kBlockSize, builder.memUsage());
-    builder.freeUnused();
-    // Remaining buffer is the last allocated block of 2x block size;
-    ASSERT_EQ(2 * kBlockSize, builder.memUsage());
-}
-
-TEST_F(SharedBufferTest, ManualFreeSharedBufferFragmentMemUsage3) {
-    constexpr size_t kBlockSize = 16;
-    SharedBufferFragmentBuilder builder(kBlockSize,
-                                        SharedBufferFragmentBuilder::DoubleGrowStrategy(
-                                            SharedBufferFragmentBuilder::kDefaultMaxBlockSize));
-
-    size_t expectedMem = 0;
-    ASSERT_EQ(expectedMem, builder.memUsage());
-
-    // This test allocates a fragment that isn't on a block boundary.
-    {
-        builder.start(1);
-        ASSERT_EQ(kBlockSize, builder.capacity());
-        auto fragment1 = builder.finish(1);
-        ASSERT_EQ(1, fragment1.size());
-        ASSERT_EQ(kBlockSize, builder.memUsage());
-
-        builder.start(kBlockSize);
-        // We will realloc with double the size.
-        ASSERT_EQ(2 * kBlockSize, builder.capacity());
-        auto fragment2 = builder.finish(kBlockSize);
-        ASSERT_EQ(kBlockSize, fragment2.size());
-        // We have one buffer of size kBlockSize and another of 2x.
-        ASSERT_EQ(3 * kBlockSize, builder.memUsage());
-    }
-
-    ASSERT_EQ(3 * kBlockSize, builder.memUsage());
-    builder.freeUnused();
-    // The last buffer we allocated was 2x the block size, so this is what remains.
-    ASSERT_EQ(2 * kBlockSize, builder.memUsage());
-}
-
-TEST_F(SharedBufferTest, ManualFreeSharedBufferFragmentMemUsageGrow) {
-    constexpr size_t kBlockSize = 16;
-    SharedBufferFragmentBuilder builder(kBlockSize,
-                                        SharedBufferFragmentBuilder::DoubleGrowStrategy(
-                                            SharedBufferFragmentBuilder::kDefaultMaxBlockSize));
-    {
-        builder.start(1);
-        ASSERT_EQ(kBlockSize, builder.capacity());
-        auto fragment1 = builder.finish(1);
-        ASSERT_EQ(1, fragment1.size());
-        ASSERT_EQ(kBlockSize, builder.memUsage());
-
-        builder.start(1);
-        ASSERT_EQ(kBlockSize - 1, builder.capacity());
-        // We will realloc a buffer of 2x the block size.
-        builder.grow(kBlockSize);
-        auto fragment2 = builder.finish(kBlockSize);
-        ASSERT_EQ(kBlockSize, fragment2.size());
-        ASSERT_EQ(3 * kBlockSize, builder.memUsage());
-    }
-
-    ASSERT_EQ(3 * kBlockSize, builder.memUsage());
-    builder.freeUnused();
-    // The last buffer we allocated was 2x the block size, so this is what remains.
-    ASSERT_EQ(2 * kBlockSize, builder.memUsage());
-}
-
-TEST_F(SharedBufferTest, ManualFreeSharedBufferFragmentMemReUse) {
-    constexpr size_t kBlockSize = 16;
-    SharedBufferFragmentBuilder builder(kBlockSize,
-                                        SharedBufferFragmentBuilder::DoubleGrowStrategy(
-                                            SharedBufferFragmentBuilder::kDefaultMaxBlockSize));
-
-    {
-        builder.start(kBlockSize);
-        ASSERT_EQ(kBlockSize, builder.capacity());
-        auto fragment1 = builder.finish(kBlockSize);
-        ASSERT_EQ(kBlockSize, fragment1.size());
-        ASSERT_EQ(kBlockSize, builder.memUsage());
-    }
-
-    {
-        // Expect that there is no increase in memory usage when we allocate a new buffer of the
-        // same size.
-        builder.start(kBlockSize);
-        ASSERT_EQ(kBlockSize, builder.capacity());
-        auto fragment2 = builder.finish(kBlockSize);
-        ASSERT_EQ(kBlockSize, fragment2.size());
-        ASSERT_EQ(kBlockSize, builder.memUsage());
-    }
-
-    {
-        // Expect that the memory usage only doubles and no more when we allocate a new buffer
-        // greater than the current capacity.
-        builder.start(2 * kBlockSize);
-        ASSERT_EQ(2 * kBlockSize, builder.capacity());
-        auto fragment = builder.finish(2 * kBlockSize);
-        ASSERT_EQ(2 * kBlockSize, builder.memUsage());
-    }
-}
-
-TEST_F(SharedBufferTest, ManualFreeSharedBufferFragmentLotsOfGrows) {
-    constexpr size_t kBlockSize = 16;
-    SharedBufferFragmentBuilder builder(kBlockSize,
-                                        SharedBufferFragmentBuilder::DoubleGrowStrategy(
-                                            SharedBufferFragmentBuilder::kDefaultMaxBlockSize));
-
-    // Ensure that when we grow and we are the exclusive user of the builder, we don't need to
-    // allocate new buffers.
-    {
-        builder.start(kBlockSize);
-        ASSERT_EQ(kBlockSize, builder.capacity());
-        ASSERT_EQ(kBlockSize, builder.memUsage());
-
-        builder.grow(2 * kBlockSize);
-        ASSERT_EQ(2 * kBlockSize, builder.capacity());
-        ASSERT_EQ(2 * kBlockSize, builder.memUsage());
-
-        builder.grow(3 * kBlockSize);
-        // We double the buffer size internally every time we realloc.
-        ASSERT_EQ(4 * kBlockSize, builder.capacity());
-        ASSERT_EQ(4 * kBlockSize, builder.memUsage());
-
-        builder.grow(4 * kBlockSize);
-        ASSERT_EQ(4 * kBlockSize, builder.capacity());
-        ASSERT_EQ(4 * kBlockSize, builder.memUsage());
-
-        builder.grow(5 * kBlockSize);
-        ASSERT_EQ(8 * kBlockSize, builder.capacity());
-        ASSERT_EQ(8 * kBlockSize, builder.memUsage());
-
-        auto fragment1 = builder.finish(5 * kBlockSize);
-        ASSERT_EQ(fragment1.size(), 5 * kBlockSize);
-
-        // If we start a new fragment, we expect that it's capacity is what remains in the buffer.
-        builder.start(kBlockSize);
-        ASSERT_EQ(3 * kBlockSize, builder.capacity());
-        ASSERT_EQ(8 * kBlockSize, builder.memUsage());
-
-        auto fragment2 = builder.finish(kBlockSize);
-        ASSERT_EQ(kBlockSize, fragment2.size());
-    }
-
-    // This has no effect on memory usage since the last allocated buffer is 8x the block size. We
-    // can't reclaim the unused space right now, but the next fragment we build should be able to.
-    builder.freeUnused();
-    ASSERT_EQ(2 * kBlockSize, builder.capacity());
-    ASSERT_EQ(8 * kBlockSize, builder.memUsage());
-
-    {
-        builder.start(kBlockSize);
-        // Since there are no active fragments, we expect to have the full capacity of the
-        // underlying buffer.
-        ASSERT_EQ(8 * kBlockSize, builder.capacity());
-        ASSERT_EQ(8 * kBlockSize, builder.memUsage());
-
-        builder.grow(8 * kBlockSize);
-        ASSERT_EQ(8 * kBlockSize, builder.capacity());
-        ASSERT_EQ(8 * kBlockSize, builder.memUsage());
-
-        auto fragment1 = builder.finish(8 * kBlockSize);
-        ASSERT_EQ(fragment1.size(), 8 * kBlockSize);
-    }
-
-    builder.freeUnused();
-    ASSERT_EQ(8 * kBlockSize, builder.memUsage());
-}
-
-TEST_F(SharedBufferTest, ManyUnusedBuffers) {
-    constexpr size_t kBlockSize = 16;
-    SharedBufferFragmentBuilder builder(
-        kBlockSize, SharedBufferFragmentBuilder::DoubleGrowStrategy(kBlockSize));
-
-    {
-        // Create many fragments, stop using them them all at once, and expect freeUnused to reclaim
-        // all but one.
-        std::vector<SharedBufferFragment> fragments;
-        for (int i = 0; i < 128; i++) {
-            builder.start(kBlockSize);
-            ASSERT_EQ(kBlockSize, builder.capacity());
-            fragments.emplace_back(builder.finish(kBlockSize));
-            ASSERT_EQ(kBlockSize * (i + 1), builder.memUsage());
-        }
-    }
-
-    builder.freeUnused();
-    ASSERT_EQ(kBlockSize, builder.memUsage());
-}
-
-}  // namespace
-}  // namespace mongo