cmd/pprof: update vendored github.com/google/pprof

Pull in the latest published version of github.com/google/pprof
as part of the continuous process of keeping Go's dependencies
up to date.

For #36905.

[git-generate]
cd src/cmd
go get github.com/google/pprof@v0.0.0-20240722153945-304e4f0156b8
go mod tidy
go mod vendor

Change-Id: If009cff7f2d99ec58315102963cbe07b6739c09a
Reviewed-on: https://go-review.googlesource.com/c/go/+/600596
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@google.com>

6 files changed, 44 insertions, 22 deletions

diff --git a/src/cmd/vendor/github.com/google/pprof/internal/driver/html/common.css b/src/cmd/vendor/github.com/google/pprof/internal/driver/html/common.css
index e0de53c1e1..14f836ff10 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/driver/html/common.css
+++ b/src/cmd/vendor/github.com/google/pprof/internal/driver/html/common.css
@@ -52,7 +52,6 @@ a {
 }
 #detailsbox {
   display: none;
-  z-index: 1;
   position: fixed;
   top: 40px;
   right: 20px;
@@ -107,7 +106,6 @@ a {
 }
 .submenu {
   display: none;
-  z-index: 1;
   margin-top: -4px;
   min-width: 10em;
   position: absolute;
@@ -169,8 +167,6 @@ a {
   top: 60px;
   left: 50%;
   transform: translateX(-50%);
-
-  z-index: 3;
   font-size: 125%;
   background-color: #ffffff;
   box-shadow: 0 1px 5px rgba(0,0,0,.3);
@@ -271,3 +267,9 @@ table tr td {
   background-color: #ebf5fb;
   font-weight: bold;
 }
+/* stacking order */
+.boxtext         { z-index: 2; }  /* flame graph box text */
+#current-details { z-index: 2; }  /* flame graph current box info */
+#detailsbox      { z-index: 3; }  /* profile details */
+.submenu         { z-index: 4; }
+.dialog          { z-index: 5; }
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/driver/html/stacks.css b/src/cmd/vendor/github.com/google/pprof/internal/driver/html/stacks.css
index f5aeb9857a..34c54ebb49 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/driver/html/stacks.css
+++ b/src/cmd/vendor/github.com/google/pprof/internal/driver/html/stacks.css
@@ -19,7 +19,6 @@ body {
   position: absolute;
   top: 5px;
   right: 5px;
-  z-index: 2;
   font-size: 12pt;
 }
 /* Background of a single flame-graph frame */
@@ -57,8 +56,6 @@ body {
   font-size: 12pt;
   font-weight: bold;
 }
-/* Ensure that pprof menu is above boxes */
-.submenu { z-index: 3; }
 /* Right-click menu */
 #action-menu {
   max-width: 15em;
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/driver/html/stacks.js b/src/cmd/vendor/github.com/google/pprof/internal/driver/html/stacks.js
index df0f0649b9..ced7151e8e 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/driver/html/stacks.js
+++ b/src/cmd/vendor/github.com/google/pprof/internal/driver/html/stacks.js
@@ -436,13 +436,29 @@ function stackViewer(stacks, nodes) {
       r.appendChild(t);
     }
 
-    r.addEventListener('click', () => { switchPivots(pprofQuoteMeta(src.UniqueName)); });
+    onClick(r, () => { switchPivots(pprofQuoteMeta(src.UniqueName)); });
     r.addEventListener('mouseenter', () => { handleEnter(box, r); });
     r.addEventListener('mouseleave', () => { handleLeave(box); });
     r.addEventListener('contextmenu', (e) => { showActionMenu(e, box); });
     return r;
   }
 
+  // Handle clicks, but only if the mouse did not move during the click.
+  function onClick(target, handler) {
+    // Disable click if mouse moves more than threshold pixels since mousedown.
+    const threshold = 3;
+    let [x, y] = [-1, -1];
+    target.addEventListener('mousedown', (e) => {
+      [x, y] = [e.clientX, e.clientY];
+    });
+    target.addEventListener('click', (e) => {
+      if (Math.abs(e.clientX - x) <= threshold &&
+          Math.abs(e.clientY - y) <= threshold) {
+        handler();
+      }
+    });
+  }
+
   function drawSep(y, posTotal, negTotal) {
     const m = document.createElement('div');
     m.innerText = summary(posTotal, negTotal);
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/driver/stacks.go b/src/cmd/vendor/github.com/google/pprof/internal/driver/stacks.go
index 355b8f2e2a..a7936107d1 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/driver/stacks.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/driver/stacks.go
@@ -20,7 +20,6 @@ import (
 	"net/http"
 
 	"github.com/google/pprof/internal/measurement"
-	"github.com/google/pprof/internal/report"
 )
 
 // stackView generates the flamegraph view.
@@ -51,8 +50,7 @@ func (ui *webInterface) stackView(w http.ResponseWriter, req *http.Request) {
 	}
 	nodes[0] = "" // root is not a real node
 
-	_, legend := report.TextItems(rpt)
-	ui.render(w, req, "stacks", rpt, errList, legend, webArgs{
+	ui.render(w, req, "stacks", rpt, errList, stacks.Legend(), webArgs{
 		Stacks:   template.JS(b),
 		Nodes:    nodes,
 		UnitDefs: measurement.UnitTypes,
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/report/report.go b/src/cmd/vendor/github.com/google/pprof/internal/report/report.go
index d72ebe914f..e21ce859d4 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/report/report.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/report/report.go
@@ -781,7 +781,7 @@ type TextItem struct {
 func TextItems(rpt *Report) ([]TextItem, []string) {
 	g, origCount, droppedNodes, _ := rpt.newTrimmedGraph()
 	rpt.selectOutputUnit(g)
-	labels := reportLabels(rpt, g, origCount, droppedNodes, 0, false)
+	labels := reportLabels(rpt, graphTotal(g), len(g.Nodes), origCount, droppedNodes, 0, false)
 
 	var items []TextItem
 	var flatSum int64
@@ -1064,7 +1064,7 @@ func printTree(w io.Writer, rpt *Report) error {
 	g, origCount, droppedNodes, _ := rpt.newTrimmedGraph()
 	rpt.selectOutputUnit(g)
 
-	fmt.Fprintln(w, strings.Join(reportLabels(rpt, g, origCount, droppedNodes, 0, false), "\n"))
+	fmt.Fprintln(w, strings.Join(reportLabels(rpt, graphTotal(g), len(g.Nodes), origCount, droppedNodes, 0, false), "\n"))
 
 	fmt.Fprintln(w, separator)
 	fmt.Fprintln(w, legend)
@@ -1128,7 +1128,7 @@ func printTree(w io.Writer, rpt *Report) error {
 func GetDOT(rpt *Report) (*graph.Graph, *graph.DotConfig) {
 	g, origCount, droppedNodes, droppedEdges := rpt.newTrimmedGraph()
 	rpt.selectOutputUnit(g)
-	labels := reportLabels(rpt, g, origCount, droppedNodes, droppedEdges, true)
+	labels := reportLabels(rpt, graphTotal(g), len(g.Nodes), origCount, droppedNodes, droppedEdges, true)
 
 	c := &graph.DotConfig{
 		Title:       rpt.options.Title,
@@ -1184,12 +1184,19 @@ func ProfileLabels(rpt *Report) []string {
 	return label
 }
 
+func graphTotal(g *graph.Graph) int64 {
+	var total int64
+	for _, n := range g.Nodes {
+		total += n.FlatValue()
+	}
+	return total
+}
+
 // reportLabels returns printable labels for a report. Includes
 // profileLabels.
-func reportLabels(rpt *Report, g *graph.Graph, origCount, droppedNodes, droppedEdges int, fullHeaders bool) []string {
+func reportLabels(rpt *Report, shownTotal int64, nodeCount, origCount, droppedNodes, droppedEdges int, fullHeaders bool) []string {
 	nodeFraction := rpt.options.NodeFraction
 	edgeFraction := rpt.options.EdgeFraction
-	nodeCount := len(g.Nodes)
 
 	var label []string
 	if len(rpt.options.ProfileLabels) > 0 {
@@ -1198,17 +1205,12 @@ func reportLabels(rpt *Report, g *graph.Graph, origCount, droppedNodes, droppedE
 		label = ProfileLabels(rpt)
 	}
 
-	var flatSum int64
-	for _, n := range g.Nodes {
-		flatSum = flatSum + n.FlatValue()
-	}
-
 	if len(rpt.options.ActiveFilters) > 0 {
 		activeFilters := legendActiveFilters(rpt.options.ActiveFilters)
 		label = append(label, activeFilters...)
 	}
 
-	label = append(label, fmt.Sprintf("Showing nodes accounting for %s, %s of %s total", rpt.formatValue(flatSum), strings.TrimSpace(measurement.Percentage(flatSum, rpt.total)), rpt.formatValue(rpt.total)))
+	label = append(label, fmt.Sprintf("Showing nodes accounting for %s, %s of %s total", rpt.formatValue(shownTotal), strings.TrimSpace(measurement.Percentage(shownTotal, rpt.total)), rpt.formatValue(rpt.total)))
 
 	if rpt.total != 0 {
 		if droppedNodes > 0 {
diff --git a/src/cmd/vendor/github.com/google/pprof/internal/report/stacks.go b/src/cmd/vendor/github.com/google/pprof/internal/report/stacks.go
index aa3bf80f2d..c6b07b86de 100644
--- a/src/cmd/vendor/github.com/google/pprof/internal/report/stacks.go
+++ b/src/cmd/vendor/github.com/google/pprof/internal/report/stacks.go
@@ -34,6 +34,7 @@ type StackSet struct {
 	Unit    string        // One of "B", "s", "GCU", or "" (if unknown)
 	Stacks  []Stack       // List of stored stacks
 	Sources []StackSource // Mapping from source index to info
+	report  *Report
 }
 
 // Stack holds a single stack instance.
@@ -94,6 +95,7 @@ func (rpt *Report) Stacks() StackSet {
 		Unit:    unit,
 		Stacks:  []Stack{},       // Ensure non-nil
 		Sources: []StackSource{}, // Ensure non-nil
+		report:  rpt,
 	}
 	s.makeInitialStacks(rpt)
 	s.fillPlaces()
@@ -187,3 +189,8 @@ func (s *StackSet) assignColors() {
 		s.Sources[i].Color = int(index % numColors)
 	}
 }
+
+// Legend returns the list of lines to display as the legend.
+func (s *StackSet) Legend() []string {
+	return reportLabels(s.report, s.report.total, len(s.Sources), len(s.Sources), 0, 0, false)
+}