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moby--moby/libnetwork/bitseq/sequence_test.go
Alessandro Boch 90711b0def Fix bug in bitsequence.pushReservation 
- pushReservation fails to correctly detect when
  the affected block is the last in the current
  sequence. It thinks instead the block is in between
  the sequence. Because of this a couple of issues
  may happen:
   1. The allocation of the last bit causes the creation
      of a phantom sequence (length 0) at the end.
      (This has no side effects).
   2. The allocation of a bit somewhere in the middle of
      the bitmask may lead to a completely incorrect
      sequence pattern.

Signed-off-by: Alessandro Boch <aboch@docker.com>
2015-11-24 10:23:58 -08:00

748 lines
33 KiB
Go
Raw Blame History

package bitseq
import (
"testing"
_ "github.com/docker/libnetwork/testutils"
)
func TestSequenceGetAvailableBit(t *testing.T) {
input := []struct {
head *sequence
from uint64
bytePos uint64
bitPos uint64
}{
{&sequence{block: 0x0, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0x0, count: 1}, 0, 0, 0},
{&sequence{block: 0x0, count: 100}, 0, 0, 0},
{&sequence{block: 0x80000000, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0x80000000, count: 1}, 0, 0, 1},
{&sequence{block: 0x80000000, count: 100}, 0, 0, 1},
{&sequence{block: 0xFF000000, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFF000000, count: 1}, 0, 1, 0},
{&sequence{block: 0xFF000000, count: 100}, 0, 1, 0},
{&sequence{block: 0xFF800000, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFF800000, count: 1}, 0, 1, 1},
{&sequence{block: 0xFF800000, count: 100}, 0, 1, 1},
{&sequence{block: 0xFFC0FF00, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFC0FF00, count: 1}, 0, 1, 2},
{&sequence{block: 0xFFC0FF00, count: 100}, 0, 1, 2},
{&sequence{block: 0xFFE0FF00, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFE0FF00, count: 1}, 0, 1, 3},
{&sequence{block: 0xFFE0FF00, count: 100}, 0, 1, 3},
{&sequence{block: 0xFFFEFF00, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFFEFF00, count: 1}, 0, 1, 7},
{&sequence{block: 0xFFFEFF00, count: 100}, 0, 1, 7},
{&sequence{block: 0xFFFFC0FF, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFFFC0FF, count: 1}, 0, 2, 2},
{&sequence{block: 0xFFFFC0FF, count: 100}, 0, 2, 2},
{&sequence{block: 0xFFFFFF00, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFFFFF00, count: 1}, 0, 3, 0},
{&sequence{block: 0xFFFFFF00, count: 100}, 0, 3, 0},
{&sequence{block: 0xFFFFFFFE, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFFFFFFE, count: 1}, 0, 3, 7},
{&sequence{block: 0xFFFFFFFE, count: 100}, 0, 3, 7},
{&sequence{block: 0xFFFFFFFF, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFFFFFFF, count: 1}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFFFFFFF, count: 100}, 0, invalidPos, invalidPos},
// now test with offset
{&sequence{block: 0x0, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0x0, count: 0}, 31, invalidPos, invalidPos},
{&sequence{block: 0x0, count: 0}, 32, invalidPos, invalidPos},
{&sequence{block: 0x0, count: 1}, 0, 0, 0},
{&sequence{block: 0x0, count: 1}, 1, 0, 1},
{&sequence{block: 0x0, count: 1}, 31, 3, 7},
{&sequence{block: 0xF0FF0000, count: 1}, 0, 0, 4},
{&sequence{block: 0xF0FF0000, count: 1}, 8, 2, 0},
{&sequence{block: 0xFFFFFFFF, count: 1}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFFFFFFF, count: 1}, 16, invalidPos, invalidPos},
{&sequence{block: 0xFFFFFFFF, count: 1}, 31, invalidPos, invalidPos},
{&sequence{block: 0xFFFFFFFE, count: 1}, 0, 3, 7},
{&sequence{block: 0xFFFFFFFF, count: 2}, 0, invalidPos, invalidPos},
{&sequence{block: 0xFFFFFFFF, count: 2}, 32, invalidPos, invalidPos},
}
for n, i := range input {
b, bb, err := i.head.getAvailableBit(i.from)
if b != i.bytePos || bb != i.bitPos {
t.Fatalf("Error in sequence.getAvailableBit(%d) (%d).\nExp: (%d, %d)\nGot: (%d, %d), err: %v", i.from, n, i.bytePos, i.bitPos, b, bb, err)
}
}
}
func TestSequenceEqual(t *testing.T) {
input := []struct {
first *sequence
second *sequence
areEqual bool
}{
{&sequence{block: 0x0, count: 8, next: nil}, &sequence{block: 0x0, count: 8}, true},
{&sequence{block: 0x0, count: 0, next: nil}, &sequence{block: 0x0, count: 0}, true},
{&sequence{block: 0x0, count: 2, next: nil}, &sequence{block: 0x0, count: 1, next: &sequence{block: 0x0, count: 1}}, false},
{&sequence{block: 0x0, count: 2, next: &sequence{block: 0x1, count: 1}}, &sequence{block: 0x0, count: 2}, false},
{&sequence{block: 0x12345678, count: 8, next: nil}, &sequence{block: 0x12345678, count: 8}, true},
{&sequence{block: 0x12345678, count: 8, next: nil}, &sequence{block: 0x12345678, count: 9}, false},
{&sequence{block: 0x12345678, count: 1, next: &sequence{block: 0XFFFFFFFF, count: 1}}, &sequence{block: 0x12345678, count: 1}, false},
{&sequence{block: 0x12345678, count: 1}, &sequence{block: 0x12345678, count: 1, next: &sequence{block: 0XFFFFFFFF, count: 1}}, false},
}
for n, i := range input {
if i.areEqual != i.first.equal(i.second) {
t.Fatalf("Error in sequence.equal() (%d).\nExp: %t\nGot: %t,", n, i.areEqual, !i.areEqual)
}
}
}
func TestSequenceCopy(t *testing.T) {
s := getTestSequence()
n := s.getCopy()
if !s.equal(n) {
t.Fatalf("copy of s failed")
}
if n == s {
t.Fatalf("not true copy of s")
}
}
func TestGetFirstAvailable(t *testing.T) {
input := []struct {
mask *sequence
bytePos uint64
bitPos uint64
}{
{&sequence{block: 0xffffffff, count: 2048}, invalidPos, invalidPos},
{&sequence{block: 0x0, count: 8}, 0, 0},
{&sequence{block: 0x80000000, count: 8}, 0, 1},
{&sequence{block: 0xC0000000, count: 8}, 0, 2},
{&sequence{block: 0xE0000000, count: 8}, 0, 3},
{&sequence{block: 0xF0000000, count: 8}, 0, 4},
{&sequence{block: 0xF8000000, count: 8}, 0, 5},
{&sequence{block: 0xFC000000, count: 8}, 0, 6},
{&sequence{block: 0xFE000000, count: 8}, 0, 7},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0x00000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0x80000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 1},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC0000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 2},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xE0000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 3},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xF0000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 4},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xF8000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 5},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFC000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 6},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFE000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 7},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFF000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFF800000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 1},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFC00000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 2},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFE00000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 3},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFF00000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 4},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFF80000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 5},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFFC0000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 6},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFFE0000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 7},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xfffffffe, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 7, 7},
{&sequence{block: 0xffffffff, count: 2, next: &sequence{block: 0x0, count: 6}}, 8, 0},
}
for n, i := range input {
bytePos, bitPos, _ := getFirstAvailable(i.mask, 0)
if bytePos != i.bytePos || bitPos != i.bitPos {
t.Fatalf("Error in (%d) getFirstAvailable(). Expected (%d, %d). Got (%d, %d)", n, i.bytePos, i.bitPos, bytePos, bitPos)
}
}
}
func TestFindSequence(t *testing.T) {
input := []struct {
head *sequence
bytePos uint64
precBlocks uint64
inBlockBytePos uint64
}{
{&sequence{block: 0xffffffff, count: 0}, 0, 0, invalidPos},
{&sequence{block: 0xffffffff, count: 0}, 31, 0, invalidPos},
{&sequence{block: 0xffffffff, count: 0}, 100, 0, invalidPos},
{&sequence{block: 0x0, count: 1}, 0, 0, 0},
{&sequence{block: 0x0, count: 1}, 1, 0, 1},
{&sequence{block: 0x0, count: 1}, 31, 0, invalidPos},
{&sequence{block: 0x0, count: 1}, 60, 0, invalidPos},
{&sequence{block: 0xffffffff, count: 10}, 0, 0, 0},
{&sequence{block: 0xffffffff, count: 10}, 3, 0, 3},
{&sequence{block: 0xffffffff, count: 10}, 4, 1, 0},
{&sequence{block: 0xffffffff, count: 10}, 7, 1, 3},
{&sequence{block: 0xffffffff, count: 10}, 8, 2, 0},
{&sequence{block: 0xffffffff, count: 10}, 39, 9, 3},
{&sequence{block: 0xffffffff, count: 10, next: &sequence{block: 0xcc000000, count: 10}}, 79, 9, 3},
{&sequence{block: 0xffffffff, count: 10, next: &sequence{block: 0xcc000000, count: 10}}, 80, 0, invalidPos},
}
for n, i := range input {
_, _, precBlocks, inBlockBytePos := findSequence(i.head, i.bytePos)
if precBlocks != i.precBlocks || inBlockBytePos != i.inBlockBytePos {
t.Fatalf("Error in (%d) findSequence(). Expected (%d, %d). Got (%d, %d)", n, i.precBlocks, i.inBlockBytePos, precBlocks, inBlockBytePos)
}
}
}
func TestCheckIfAvailable(t *testing.T) {
input := []struct {
head *sequence
ordinal uint64
bytePos uint64
bitPos uint64
}{
{&sequence{block: 0xffffffff, count: 0}, 0, invalidPos, invalidPos},
{&sequence{block: 0xffffffff, count: 0}, 31, invalidPos, invalidPos},
{&sequence{block: 0xffffffff, count: 0}, 100, invalidPos, invalidPos},
{&sequence{block: 0x0, count: 1}, 0, 0, 0},
{&sequence{block: 0x0, count: 1}, 1, 0, 1},
{&sequence{block: 0x0, count: 1}, 31, 3, 7},
{&sequence{block: 0x0, count: 1}, 60, invalidPos, invalidPos},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0x800000ff, count: 1}}, 31, invalidPos, invalidPos},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0x800000ff, count: 1}}, 32, invalidPos, invalidPos},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0x800000ff, count: 1}}, 33, 4, 1},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC00000ff, count: 1}}, 33, invalidPos, invalidPos},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC00000ff, count: 1}}, 34, 4, 2},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC00000ff, count: 1, next: &sequence{block: 0x0, count: 1}}}, 55, 6, 7},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC00000ff, count: 1, next: &sequence{block: 0x0, count: 1}}}, 56, invalidPos, invalidPos},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC00000ff, count: 1, next: &sequence{block: 0x0, count: 1}}}, 63, invalidPos, invalidPos},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC00000ff, count: 1, next: &sequence{block: 0x0, count: 1}}}, 64, 8, 0},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC00000ff, count: 1, next: &sequence{block: 0x0, count: 1}}}, 95, 11, 7},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC00000ff, count: 1, next: &sequence{block: 0x0, count: 1}}}, 96, invalidPos, invalidPos},
}
for n, i := range input {
bytePos, bitPos, err := checkIfAvailable(i.head, i.ordinal)
if bytePos != i.bytePos || bitPos != i.bitPos {
t.Fatalf("Error in (%d) checkIfAvailable(ord:%d). Expected (%d, %d). Got (%d, %d). err: %v", n, i.ordinal, i.bytePos, i.bitPos, bytePos, bitPos, err)
}
}
}
func TestMergeSequences(t *testing.T) {
input := []struct {
original *sequence
merged *sequence
}{
{&sequence{block: 0xFE000000, count: 8, next: &sequence{block: 0xFE000000, count: 2}}, &sequence{block: 0xFE000000, count: 10}},
{&sequence{block: 0xFFFFFFFF, count: 8, next: &sequence{block: 0xFFFFFFFF, count: 1}}, &sequence{block: 0xFFFFFFFF, count: 9}},
{&sequence{block: 0xFFFFFFFF, count: 1, next: &sequence{block: 0xFFFFFFFF, count: 8}}, &sequence{block: 0xFFFFFFFF, count: 9}},
{&sequence{block: 0xFFFFFFF0, count: 8, next: &sequence{block: 0xFFFFFFF0, count: 1}}, &sequence{block: 0xFFFFFFF0, count: 9}},
{&sequence{block: 0xFFFFFFF0, count: 1, next: &sequence{block: 0xFFFFFFF0, count: 8}}, &sequence{block: 0xFFFFFFF0, count: 9}},
{&sequence{block: 0xFE, count: 8, next: &sequence{block: 0xFE, count: 1, next: &sequence{block: 0xFE, count: 5}}}, &sequence{block: 0xFE, count: 14}},
{&sequence{block: 0xFE, count: 8, next: &sequence{block: 0xFE, count: 1, next: &sequence{block: 0xFE, count: 5, next: &sequence{block: 0xFF, count: 1}}}},
&sequence{block: 0xFE, count: 14, next: &sequence{block: 0xFF, count: 1}}},
// No merge
{&sequence{block: 0xFE, count: 8, next: &sequence{block: 0xF8, count: 1, next: &sequence{block: 0xFE, count: 5}}},
&sequence{block: 0xFE, count: 8, next: &sequence{block: 0xF8, count: 1, next: &sequence{block: 0xFE, count: 5}}}},
// No merge from head: // Merge function tries to merge from passed head. If it can't merge with next, it does not reattempt with next as head
{&sequence{block: 0xFE, count: 8, next: &sequence{block: 0xFF, count: 1, next: &sequence{block: 0xFF, count: 5}}},
&sequence{block: 0xFE, count: 8, next: &sequence{block: 0xFF, count: 6}}},
}
for n, i := range input {
mergeSequences(i.original)
for !i.merged.equal(i.original) {
t.Fatalf("Error in (%d) mergeSequences().\nExp: %s\nGot: %s,", n, i.merged.toString(), i.original.toString())
}
}
}
func TestPushReservation(t *testing.T) {
input := []struct {
mask *sequence
bytePos uint64
bitPos uint64
newMask *sequence
}{
// Create first sequence and fill in 8 addresses starting from address 0
{&sequence{block: 0x0, count: 8, next: nil}, 0, 0, &sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 7, next: nil}}},
{&sequence{block: 0x80000000, count: 8}, 0, 1, &sequence{block: 0xC0000000, count: 1, next: &sequence{block: 0x80000000, count: 7, next: nil}}},
{&sequence{block: 0xC0000000, count: 8}, 0, 2, &sequence{block: 0xE0000000, count: 1, next: &sequence{block: 0xC0000000, count: 7, next: nil}}},
{&sequence{block: 0xE0000000, count: 8}, 0, 3, &sequence{block: 0xF0000000, count: 1, next: &sequence{block: 0xE0000000, count: 7, next: nil}}},
{&sequence{block: 0xF0000000, count: 8}, 0, 4, &sequence{block: 0xF8000000, count: 1, next: &sequence{block: 0xF0000000, count: 7, next: nil}}},
{&sequence{block: 0xF8000000, count: 8}, 0, 5, &sequence{block: 0xFC000000, count: 1, next: &sequence{block: 0xF8000000, count: 7, next: nil}}},
{&sequence{block: 0xFC000000, count: 8}, 0, 6, &sequence{block: 0xFE000000, count: 1, next: &sequence{block: 0xFC000000, count: 7, next: nil}}},
{&sequence{block: 0xFE000000, count: 8}, 0, 7, &sequence{block: 0xFF000000, count: 1, next: &sequence{block: 0xFE000000, count: 7, next: nil}}},
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 7}}, 0, 1, &sequence{block: 0xC0000000, count: 1, next: &sequence{block: 0x0, count: 7, next: nil}}},
// Create second sequence and fill in 8 addresses starting from address 32
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0x00000000, count: 1, next: &sequence{block: 0xffffffff, count: 6, next: nil}}}, 4, 0,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0x80000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0x80000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 1,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC0000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xC0000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 2,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xE0000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xE0000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 3,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xF0000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xF0000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 4,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xF8000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xF8000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 5,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFC000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFC000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 6,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFE000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFE000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 4, 7,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFF000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
// fill in 8 addresses starting from address 40
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFF000000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 0,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFF800000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFF800000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 1,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFC00000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFC00000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 2,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFE00000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFE00000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 3,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFF00000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFF00000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 4,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFF80000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFF80000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 5,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFFC0000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFFC0000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 6,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFFE0000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFFE0000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}, 5, 7,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xFFFF0000, count: 1, next: &sequence{block: 0xffffffff, count: 6}}}},
// Insert new sequence
{&sequence{block: 0xffffffff, count: 2, next: &sequence{block: 0x0, count: 6}}, 8, 0,
&sequence{block: 0xffffffff, count: 2, next: &sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 5}}}},
{&sequence{block: 0xffffffff, count: 2, next: &sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 5}}}, 8, 1,
&sequence{block: 0xffffffff, count: 2, next: &sequence{block: 0xC0000000, count: 1, next: &sequence{block: 0x0, count: 5}}}},
// Merge affected with next
{&sequence{block: 0xffffffff, count: 7, next: &sequence{block: 0xfffffffe, count: 2, next: &sequence{block: 0xffffffff, count: 1}}}, 31, 7,
&sequence{block: 0xffffffff, count: 8, next: &sequence{block: 0xfffffffe, count: 1, next: &sequence{block: 0xffffffff, count: 1}}}},
{&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xfffffffc, count: 1, next: &sequence{block: 0xfffffffe, count: 6}}}, 7, 6,
&sequence{block: 0xffffffff, count: 1, next: &sequence{block: 0xfffffffe, count: 7}}},
// Merge affected with next and next.next
{&sequence{block: 0xffffffff, count: 7, next: &sequence{block: 0xfffffffe, count: 1, next: &sequence{block: 0xffffffff, count: 1}}}, 31, 7,
&sequence{block: 0xffffffff, count: 9}},
{&sequence{block: 0xffffffff, count: 7, next: &sequence{block: 0xfffffffe, count: 1}}, 31, 7,
&sequence{block: 0xffffffff, count: 8}},
// Merge affected with previous and next
{&sequence{block: 0xffffffff, count: 7, next: &sequence{block: 0xfffffffe, count: 1, next: &sequence{block: 0xffffffff, count: 1}}}, 31, 7,
&sequence{block: 0xffffffff, count: 9}},
// Redundant push: No change
{&sequence{block: 0xffff0000, count: 1}, 0, 0, &sequence{block: 0xffff0000, count: 1}},
{&sequence{block: 0xffff0000, count: 7}, 25, 7, &sequence{block: 0xffff0000, count: 7}},
{&sequence{block: 0xffffffff, count: 7, next: &sequence{block: 0xfffffffe, count: 1, next: &sequence{block: 0xffffffff, count: 1}}}, 7, 7,
&sequence{block: 0xffffffff, count: 7, next: &sequence{block: 0xfffffffe, count: 1, next: &sequence{block: 0xffffffff, count: 1}}}},
// Set last bit
{&sequence{block: 0x0, count: 8}, 31, 7, &sequence{block: 0x0, count: 7, next: &sequence{block: 0x1, count: 1}}},
// Set bit in a middle sequence in the first block, first bit
{&sequence{block: 0x40000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 4, 0,
&sequence{block: 0x40000000, count: 1, next: &sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 5,
next: &sequence{block: 0x1, count: 1}}}}},
// Set bit in a middle sequence in the first block, first bit (merge involved)
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 4, 0,
&sequence{block: 0x80000000, count: 2, next: &sequence{block: 0x0, count: 5, next: &sequence{block: 0x1, count: 1}}}},
// Set bit in a middle sequence in the first block, last bit
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 4, 31,
&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x1, count: 1, next: &sequence{block: 0x0, count: 5,
next: &sequence{block: 0x1, count: 1}}}}},
// Set bit in a middle sequence in the first block, middle bit
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 4, 16,
&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x8000, count: 1, next: &sequence{block: 0x0, count: 5,
next: &sequence{block: 0x1, count: 1}}}}},
// Set bit in a middle sequence in a middle block, first bit
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 16, 0,
&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 3, next: &sequence{block: 0x80000000, count: 1,
next: &sequence{block: 0x0, count: 2, next: &sequence{block: 0x1, count: 1}}}}}},
// Set bit in a middle sequence in a middle block, last bit
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 16, 31,
&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 3, next: &sequence{block: 0x1, count: 1,
next: &sequence{block: 0x0, count: 2, next: &sequence{block: 0x1, count: 1}}}}}},
// Set bit in a middle sequence in a middle block, middle bit
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 16, 15,
&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 3, next: &sequence{block: 0x10000, count: 1,
next: &sequence{block: 0x0, count: 2, next: &sequence{block: 0x1, count: 1}}}}}},
// Set bit in a middle sequence in the last block, first bit
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 24, 0,
&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 5, next: &sequence{block: 0x80000000, count: 1,
next: &sequence{block: 0x1, count: 1}}}}},
// Set bit in a middle sequence in the last block, last bit
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x4, count: 1}}}, 24, 31,
&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 5, next: &sequence{block: 0x1, count: 1,
next: &sequence{block: 0x4, count: 1}}}}},
// Set bit in a middle sequence in the last block, last bit (merge involved)
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 24, 31,
&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 5, next: &sequence{block: 0x1, count: 2}}}},
// Set bit in a middle sequence in the last block, middle bit
{&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 6, next: &sequence{block: 0x1, count: 1}}}, 24, 16,
&sequence{block: 0x80000000, count: 1, next: &sequence{block: 0x0, count: 5, next: &sequence{block: 0x8000, count: 1,
next: &sequence{block: 0x1, count: 1}}}}},
}
for n, i := range input {
mask := pushReservation(i.bytePos, i.bitPos, i.mask, false)
if !mask.equal(i.newMask) {
t.Fatalf("Error in (%d) pushReservation():\n%s + (%d,%d):\nExp: %s\nGot: %s,",
n, i.mask.toString(), i.bytePos, i.bitPos, i.newMask.toString(), mask.toString())
}
}
}
func TestSerializeDeserialize(t *testing.T) {
s := getTestSequence()
data, err := s.toByteArray()
if err != nil {
t.Fatal(err)
}
r := &sequence{}
err = r.fromByteArray(data)
if err != nil {
t.Fatal(err)
}
if !s.equal(r) {
t.Fatalf("Sequences are different: \n%v\n%v", s, r)
}
}
func getTestSequence() *sequence {
// Returns a custom sequence of 1024 * 32 bits
return &sequence{
block: 0XFFFFFFFF,
count: 100,
next: &sequence{
block: 0xFFFFFFFE,
count: 1,
next: &sequence{
block: 0xFF000000,
count: 10,
next: &sequence{
block: 0XFFFFFFFF,
count: 50,
next: &sequence{
block: 0XFFFFFFFC,
count: 1,
next: &sequence{
block: 0xFF800000,
count: 1,
next: &sequence{
block: 0XFFFFFFFF,
count: 87,
next: &sequence{
block: 0x0,
count: 150,
next: &sequence{
block: 0XFFFFFFFF,
count: 200,
next: &sequence{
block: 0x0000FFFF,
count: 1,
next: &sequence{
block: 0x0,
count: 399,
next: &sequence{
block: 0XFFFFFFFF,
count: 23,
next: &sequence{
block: 0x1,
count: 1,
},
},
},
},
},
},
},
},
},
},
},
},
}
}
func TestSet(t *testing.T) {
hnd, err := NewHandle("", nil, "", 1024*32)
if err != nil {
t.Fatal(err)
}
hnd.head = getTestSequence()
firstAv := uint64(32*100 + 31)
last := uint64(1024*32 - 1)
if hnd.IsSet(100000) {
t.Fatal("IsSet() returned wrong result")
}
if !hnd.IsSet(0) {
t.Fatal("IsSet() returned wrong result")
}
if hnd.IsSet(firstAv) {
t.Fatal("IsSet() returned wrong result")
}
if !hnd.IsSet(last) {
t.Fatal("IsSet() returned wrong result")
}
if err := hnd.Set(0); err == nil {
t.Fatalf("Expected failure, but succeeded")
}
os, err := hnd.SetAny()
if err != nil {
t.Fatalf("Unexpected failure: %v", err)
}
if os != firstAv {
t.Fatalf("SetAny returned unexpected ordinal. Expected %d. Got %d.", firstAv, os)
}
if !hnd.IsSet(firstAv) {
t.Fatal("IsSet() returned wrong result")
}
if err := hnd.Unset(firstAv); err != nil {
t.Fatalf("Unexpected failure: %v", err)
}
if hnd.IsSet(firstAv) {
t.Fatal("IsSet() returned wrong result")
}
if err := hnd.Set(firstAv); err != nil {
t.Fatalf("Unexpected failure: %v", err)
}
if err := hnd.Set(last); err == nil {
t.Fatalf("Expected failure, but succeeded")
}
}
func TestSetUnset(t *testing.T) {
numBits := uint64(64 * 1024)
hnd, err := NewHandle("", nil, "", numBits)
if err != nil {
t.Fatal(err)
}
// set and unset all one by one
for hnd.Unselected() > 0 {
if _, err := hnd.SetAny(); err != nil {
t.Fatal(err)
}
}
i := uint64(0)
for hnd.Unselected() < numBits {
if err := hnd.Unset(i); err != nil {
t.Fatal(err)
}
i++
}
}
func TestSetInRange(t *testing.T) {
numBits := uint64(1024 * blockLen)
hnd, err := NewHandle("", nil, "", numBits)
if err != nil {
t.Fatal(err)
}
hnd.head = getTestSequence()
firstAv := uint64(100*blockLen + blockLen - 1)
if o, err := hnd.SetAnyInRange(4, 3); err == nil {
t.Fatalf("Expected failure. Got success with ordinal:%d", o)
}
if o, err := hnd.SetAnyInRange(5, 5); err == nil {
t.Fatalf("Expected failure. Got success with ordinal:%d", o)
}
if o, err := hnd.SetAnyInRange(0, numBits); err == nil {
t.Fatalf("Expected failure. Got success with ordinal:%d", o)
}
o, err := hnd.SetAnyInRange(100*uint64(blockLen), 101*uint64(blockLen))
if err != nil {
t.Fatalf("Unexpected failure: (%d, %v)", o, err)
}
if o != firstAv {
t.Fatalf("Unexpected ordinal: %d", o)
}
if o, err := hnd.SetAnyInRange(0, uint64(blockLen)); err == nil {
t.Fatalf("Expected failure. Got success with ordinal:%d", o)
}
if o, err := hnd.SetAnyInRange(0, firstAv-1); err == nil {
t.Fatalf("Expected failure. Got success with ordinal:%d", o)
}
if o, err := hnd.SetAnyInRange(111*uint64(blockLen), 161*uint64(blockLen)); err == nil {
t.Fatalf("Expected failure. Got success with ordinal:%d", o)
}
o, err = hnd.SetAnyInRange(161*uint64(blockLen), 162*uint64(blockLen))
if err != nil {
t.Fatal(err)
}
if o != 161*uint64(blockLen)+30 {
t.Fatalf("Unexpected ordinal: %d", o)
}
o, err = hnd.SetAnyInRange(161*uint64(blockLen), 162*uint64(blockLen))
if err != nil {
t.Fatal(err)
}
if o != 161*uint64(blockLen)+31 {
t.Fatalf("Unexpected ordinal: %d", o)
}
o, err = hnd.SetAnyInRange(161*uint64(blockLen), 162*uint64(blockLen))
if err == nil {
t.Fatalf("Expected failure. Got success with ordinal:%d", o)
}
if _, err := hnd.SetAnyInRange(0, numBits-1); err != nil {
t.Fatalf("Unexpected failure: %v", err)
}
// create a non multiple of 32 mask
hnd, err = NewHandle("", nil, "", 30)
if err != nil {
t.Fatal(err)
}
// set all bit in the first range
for hnd.Unselected() > 22 {
if o, err := hnd.SetAnyInRange(0, 7); err != nil {
t.Fatalf("Unexpected failure: (%d, %v)", o, err)
}
}
// try one more set, which should fail
o, err = hnd.SetAnyInRange(0, 7)
if err == nil {
t.Fatalf("Expected failure. Got success with ordinal:%d", o)
}
if err != errNoBitAvailable {
t.Fatalf("Unexpected error: %v", err)
}
// set all bit in a second range
for hnd.Unselected() > 14 {
if o, err := hnd.SetAnyInRange(8, 15); err != nil {
t.Fatalf("Unexpected failure: (%d, %v)", o, err)
}
}
// try one more set, which should fail
o, err = hnd.SetAnyInRange(0, 15)
if err == nil {
t.Fatalf("Expected failure. Got success with ordinal:%d", o)
}
if err != errNoBitAvailable {
t.Fatalf("Unexpected error: %v", err)
}
// set all bit in a range which includes the last bit
for hnd.Unselected() > 12 {
if o, err := hnd.SetAnyInRange(28, 29); err != nil {
t.Fatalf("Unexpected failure: (%d, %v)", o, err)
}
}
o, err = hnd.SetAnyInRange(28, 29)
if err == nil {
t.Fatalf("Expected failure. Got success with ordinal:%d", o)
}
if err != errNoBitAvailable {
t.Fatalf("Unexpected error: %v", err)
}
}
// This one tests an allocation pattern which unveiled an issue in pushReservation
// Specifically a failure in detecting when we are in the (B) case (the bit to set
// belongs to the last block of the current sequence). Because of a bug, code
// was assuming the bit belonged to a block in the middle of the current sequence.
// Which in turn caused an incorrect allocation when requesting a bit which is not
// in the first or last sequence block.
func TestSetAnyInRange(t *testing.T) {
numBits := uint64(8 * blockLen)
hnd, err := NewHandle("", nil, "", numBits)
if err != nil {
t.Fatal(err)
}
if err := hnd.Set(0); err != nil {
t.Fatal(err)
}
if err := hnd.Set(255); err != nil {
t.Fatal(err)
}
o, err := hnd.SetAnyInRange(128, 255)
if err != nil {
t.Fatal(err)
}
if o != 128 {
t.Fatalf("Unexpected ordinal: %d", o)
}
o, err = hnd.SetAnyInRange(128, 255)
if err != nil {
t.Fatal(err)
}
if o != 129 {
t.Fatalf("Unexpected ordinal: %d", o)
}
o, err = hnd.SetAnyInRange(246, 255)
if err != nil {
t.Fatal(err)
}
if o != 246 {
t.Fatalf("Unexpected ordinal: %d", o)
}
o, err = hnd.SetAnyInRange(246, 255)
if err != nil {
t.Fatal(err)
}
if o != 247 {
t.Fatalf("Unexpected ordinal: %d", o)
}
}
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