mirror of
https://github.com/golang/go
synced 2024-10-01 16:38:34 -06:00
785cfaa938
Also: pointer.Analyze now returns a pointer.Result object, containing the callgraph and the results of ssa.Value queries. The oracle has been updated to use the new call and pointer APIs. R=crawshaw, gri CC=golang-dev https://golang.org/cl/13915043
95 lines
2.5 KiB
Go
95 lines
2.5 KiB
Go
// Copyright 2013 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package oracle
|
|
|
|
import (
|
|
"go/token"
|
|
"strings"
|
|
|
|
"code.google.com/p/go.tools/call"
|
|
"code.google.com/p/go.tools/oracle/serial"
|
|
)
|
|
|
|
// callgraph displays the entire callgraph of the current program.
|
|
//
|
|
// Nodes may be seem to appear multiple times due to (limited)
|
|
// context sensitivity.
|
|
//
|
|
// TODO(adonovan): add options for restricting the display to a region
|
|
// of interest: function, package, subgraph, dirtree, goroutine, etc.
|
|
//
|
|
// TODO(adonovan): add an option to project away context sensitivity.
|
|
// The callgraph API should provide this feature.
|
|
//
|
|
// TODO(adonovan): add an option to partition edges by call site.
|
|
//
|
|
// TODO(adonovan): elide nodes for synthetic functions?
|
|
//
|
|
func callgraph(o *Oracle, _ *QueryPos) (queryResult, error) {
|
|
buildSSA(o)
|
|
|
|
// Run the pointer analysis and build the complete callgraph.
|
|
o.config.BuildCallGraph = true
|
|
ptares := ptrAnalysis(o)
|
|
|
|
return &callgraphResult{
|
|
callgraph: ptares.CallGraph,
|
|
}, nil
|
|
}
|
|
|
|
type callgraphResult struct {
|
|
callgraph call.Graph
|
|
}
|
|
|
|
func (r *callgraphResult) display(printf printfFunc) {
|
|
printf(nil, `
|
|
Below is a call graph of the entire program.
|
|
The numbered nodes form a spanning tree.
|
|
Non-numbered nodes indicate back- or cross-edges to the node whose
|
|
number follows in parentheses.
|
|
Some nodes may appear multiple times due to context-sensitive
|
|
treatment of some calls.
|
|
`)
|
|
|
|
seen := make(map[call.GraphNode]int)
|
|
var print func(cgn call.GraphNode, indent int)
|
|
print = func(cgn call.GraphNode, indent int) {
|
|
fn := cgn.Func()
|
|
if num, ok := seen[cgn]; !ok {
|
|
num = len(seen)
|
|
seen[cgn] = num
|
|
printf(fn, "%d\t%s%s", num, strings.Repeat(" ", indent), fn)
|
|
// Don't use Edges(), which distinguishes callees by call site.
|
|
for callee := range call.CalleesOf(cgn) {
|
|
print(callee, indent+1)
|
|
}
|
|
} else {
|
|
printf(fn, "\t%s%s (%d)", strings.Repeat(" ", indent), fn, num)
|
|
}
|
|
}
|
|
print(r.callgraph.Root(), 0)
|
|
}
|
|
|
|
func (r *callgraphResult) toSerial(res *serial.Result, fset *token.FileSet) {
|
|
nodes := r.callgraph.Nodes()
|
|
|
|
numbering := make(map[call.GraphNode]int)
|
|
for i, n := range nodes {
|
|
numbering[n] = i
|
|
}
|
|
|
|
cg := make([]serial.CallGraph, len(nodes))
|
|
for i, n := range nodes {
|
|
j := &cg[i]
|
|
fn := n.Func()
|
|
j.Name = fn.String()
|
|
j.Pos = fset.Position(fn.Pos()).String()
|
|
for callee := range call.CalleesOf(n) {
|
|
j.Children = append(j.Children, numbering[callee])
|
|
}
|
|
}
|
|
res.Callgraph = cg
|
|
}
|