35 lines
1 KiB
Go
35 lines
1 KiB
Go
// Package static computes the call graph of a Go program containing
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// only static call edges.
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package static // import "honnef.co/go/tools/callgraph/static"
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import (
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"honnef.co/go/tools/callgraph"
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"honnef.co/go/tools/ssa"
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"honnef.co/go/tools/ssa/ssautil"
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)
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// CallGraph computes the call graph of the specified program
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// considering only static calls.
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//
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func CallGraph(prog *ssa.Program) *callgraph.Graph {
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cg := callgraph.New(nil) // TODO(adonovan) eliminate concept of rooted callgraph
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// TODO(adonovan): opt: use only a single pass over the ssa.Program.
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// TODO(adonovan): opt: this is slower than RTA (perhaps because
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// the lower precision means so many edges are allocated)!
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for f := range ssautil.AllFunctions(prog) {
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fnode := cg.CreateNode(f)
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for _, b := range f.Blocks {
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for _, instr := range b.Instrs {
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if site, ok := instr.(ssa.CallInstruction); ok {
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if g := site.Common().StaticCallee(); g != nil {
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gnode := cg.CreateNode(g)
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callgraph.AddEdge(fnode, site, gnode)
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}
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}
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}
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}
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}
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return cg
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}
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