mirror of
https://github.com/golang/go
synced 2024-11-19 06:34:42 -07:00
6643abb26c
Suggested reading order: - doc.go - api.go, analysis.go, callgraph.go, labels.go - print.go, util.go - gen.go - solve.go - pointer_test.go, testdata/* - intrinsics.go (none are implemented yet) R=dannyb, gri, crawshaw, 0xjnml CC=golang-dev https://golang.org/cl/10618043
71 lines
1.5 KiB
Go
71 lines
1.5 KiB
Go
package main
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import "runtime"
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func final1a(x *int) int {
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print(x) // @pointsto alloc@newint:10
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return *x
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}
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func final1b(x *bool) {
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print(x) // @pointsto
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}
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func setfinalizer1() {
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x := new(int) // @line newint
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runtime.SetFinalizer(x, final1a) // ok: final1a's result is ignored
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runtime.SetFinalizer(x, final1b) // param type mismatch: no effect
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}
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// @calls runtime.SetFinalizer -> main.final1a
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// @calls main.setfinalizer1 -> runtime.SetFinalizer
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func final2a(x *bool) {
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print(x) // @pointsto alloc@newbool1:10 | alloc@newbool2:10
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}
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func final2b(x *bool) {
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print(x) // @pointsto alloc@newbool1:10 | alloc@newbool2:10
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}
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func setfinalizer2() {
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x := new(bool) // @line newbool1
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f := final2a
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if unknown {
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x = new(bool) // @line newbool2
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f = final2b
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}
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runtime.SetFinalizer(x, f)
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}
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// @calls runtime.SetFinalizer -> main.final2a
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// @calls runtime.SetFinalizer -> main.final2b
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// @calls main.setfinalizer2 -> runtime.SetFinalizer
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// type T int
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// func (t *T) finalize() {
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// print(t) // #@pointsto x
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// }
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// func setfinalizer3() {
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// x := new(T)
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// runtime.SetFinalizer(x, (*T).finalize) // go/types gives wrong type to f.
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// }
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// #@calls runtime.SetFinalizer -> (*T) finalize
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func funcForPC() {
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f := runtime.FuncForPC(0) // @line funcforpc
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print(f) // @pointsto reflectAlloc@funcforpc:25
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}
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func main() {
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setfinalizer1()
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setfinalizer2()
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// setfinalizer3()
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funcForPC()
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}
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var unknown bool // defeat dead-code elimination
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