vendor.sh: bump go-patricia to 2.2.4 to fix leaks

Signed-off-by: Cristian Staretu <[email protected]>

hack/vendor.sh

@@ -53,7 +53,7 @@ clone git github.com/gorilla/mux e444e69cbd
 clone git github.com/kr/pty 5cf931ef8f
 clone git github.com/mattn/go-shellwords v1.0.0
 clone git github.com/mattn/go-sqlite3 v1.1.0
-clone git github.com/tchap/go-patricia v2.1.0
+clone git github.com/tchap/go-patricia v2.2.4
 clone git github.com/vdemeester/shakers 24d7f1d6a71aa5d9cbe7390e4afb66b7eef9e1b3
 # forked golang.org/x/net package includes a patch for lazy loading trace templates
 clone git golang.org/x/net 2beffdc2e92c8a3027590f898fe88f69af48a3f8 https://github.com/tonistiigi/net.git

vendor/src/github.com/tchap/go-patricia/patricia/children.go

@@ -5,16 +5,22 @@
 
 package patricia
 
-import "sort"
+import (
+	"fmt"
+	"io"
+	"sort"
+)
 
 type childList interface {
 	length() int
 	head() *Trie
 	add(child *Trie) childList
+	remove(b byte)
 	replace(b byte, child *Trie)
-	remove(child *Trie)
 	next(b byte) *Trie
 	walk(prefix *Prefix, visitor VisitorFunc) error
+	print(w io.Writer, indent int)
+	total() int
 }
 
 type tries []*Trie
@@ -38,7 +44,7 @@ type sparseChildList struct {
 
 func newSparseChildList(maxChildrenPerSparseNode int) childList {
 	return &sparseChildList{
-		children: make(tries, 0, DefaultMaxChildrenPerSparseNode),
+		children: make(tries, 0, maxChildrenPerSparseNode),
 	}
 }
 
@@ -61,26 +67,33 @@ func (list *sparseChildList) add(child *Trie) childList {
 	return newDenseChildList(list, child)
 }
 
-func (list *sparseChildList) replace(b byte, child *Trie) {
-	// Seek the child and replace it.
+func (list *sparseChildList) remove(b byte) {
 	for i, node := range list.children {
 		if node.prefix[0] == b {
-			list.children[i] = child
+			list.children, list.children[len(list.children)-1] =
+				append(list.children[:i], list.children[i+1:]...),
+				nil
 			return
 		}
 	}
+
+	// This is not supposed to be reached.
+	panic("removing non-existent child")
 }
 
-func (list *sparseChildList) remove(child *Trie) {
+func (list *sparseChildList) replace(b byte, child *Trie) {
+	// Make a consistency check.
+	if p0 := child.prefix[0]; p0 != b {
+		panic(fmt.Errorf("child prefix mismatch: %v != %v", p0, b))
+	}
+
+	// Seek the child and replace it.
 	for i, node := range list.children {
-		if node.prefix[0] == child.prefix[0] {
-			list.children = append(list.children[:i], list.children[i+1:]...)
+		if node.prefix[0] == b {
+			list.children[i] = child
 			return
 		}
 	}
-
-	// This is not supposed to be reached.
-	panic("removing non-existent child")
 }
 
 func (list *sparseChildList) next(b byte) *Trie {
@@ -120,10 +133,30 @@ func (list *sparseChildList) walk(prefix *Prefix, visitor VisitorFunc) error {
 	return nil
 }
 
+func (list *sparseChildList) total() int {
+	tot := 0
+	for _, child := range list.children {
+		if child != nil {
+			tot = tot + child.total()
+		}
+	}
+	return tot
+}
+
+func (list *sparseChildList) print(w io.Writer, indent int) {
+	for _, child := range list.children {
+		if child != nil {
+			child.print(w, indent)
+		}
+	}
+}
+
 type denseChildList struct {
-	min      int
-	max      int
-	children []*Trie
+	min         int
+	max         int
+	numChildren int
+	headIndex   int
+	children    []*Trie
 }
 
 func newDenseChildList(list *sparseChildList, child *Trie) childList {
@@ -155,57 +188,87 @@ func newDenseChildList(list *sparseChildList, child *Trie) childList {
 	}
 	children[int(child.prefix[0])-min] = child
 
-	return &denseChildList{min, max, children}
+	return &denseChildList{
+		min:         min,
+		max:         max,
+		numChildren: list.length() + 1,
+		headIndex:   0,
+		children:    children,
+	}
 }
 
 func (list *denseChildList) length() int {
-	return list.max - list.min + 1
+	return list.numChildren
 }
 
 func (list *denseChildList) head() *Trie {
-	return list.children[0]
+	return list.children[list.headIndex]
 }
 
 func (list *denseChildList) add(child *Trie) childList {
 	b := int(child.prefix[0])
+	var i int
 
 	switch {
 	case list.min <= b && b <= list.max:
 		if list.children[b-list.min] != nil {
 			panic("dense child list collision detected")
 		}
-		list.children[b-list.min] = child
+		i = b - list.min
+		list.children[i] = child
 
 	case b < list.min:
 		children := make([]*Trie, list.max-b+1)
-		children[0] = child
+		i = 0
+		children[i] = child
 		copy(children[list.min-b:], list.children)
 		list.children = children
 		list.min = b
 
 	default: // b > list.max
 		children := make([]*Trie, b-list.min+1)
-		children[b-list.min] = child
+		i = b - list.min
+		children[i] = child
 		copy(children, list.children)
 		list.children = children
 		list.max = b
 	}
 
+	list.numChildren++
+	if i < list.headIndex {
+		list.headIndex = i
+	}
 	return list
 }
 
-func (list *denseChildList) replace(b byte, child *Trie) {
-	list.children[int(b)-list.min] = nil
-	list.children[int(child.prefix[0])-list.min] = child
-}
-
-func (list *denseChildList) remove(child *Trie) {
-	i := int(child.prefix[0]) - list.min
+func (list *denseChildList) remove(b byte) {
+	i := int(b) - list.min
 	if list.children[i] == nil {
 		// This is not supposed to be reached.
 		panic("removing non-existent child")
 	}
+	list.numChildren--
 	list.children[i] = nil
+
+	// Update head index.
+	if i == list.headIndex {
+		for ; i < len(list.children); i++ {
+			if list.children[i] != nil {
+				list.headIndex = i
+				return
+			}
+		}
+	}
+}
+
+func (list *denseChildList) replace(b byte, child *Trie) {
+	// Make a consistency check.
+	if p0 := child.prefix[0]; p0 != b {
+		panic(fmt.Errorf("child prefix mismatch: %v != %v", p0, b))
+	}
+
+	// Replace the child.
+	list.children[int(b)-list.min] = child
 }
 
 func (list *denseChildList) next(b byte) *Trie {
@@ -242,3 +305,21 @@ func (list *denseChildList) walk(prefix *Prefix, visitor VisitorFunc) error {
 
 	return nil
 }
+
+func (list *denseChildList) print(w io.Writer, indent int) {
+	for _, child := range list.children {
+		if child != nil {
+			child.print(w, indent)
+		}
+	}
+}
+
+func (list *denseChildList) total() int {
+	tot := 0
+	for _, child := range list.children {
+		if child != nil {
+			tot = tot + child.total()
+		}
+	}
+	return tot
+}