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// Copyright 2021 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 main
import (
"fmt"
"internal/testenv"
"os"
"os/exec"
"path/filepath"
"runtime"
"strings"
"testing"
)
var tmp, pprofExe string // populated by buildPprof
func TestMain(m *testing.M) {
if !testenv.HasGoBuild() {
return
}
var exitcode int
if err := buildPprof(); err == nil {
exitcode = m.Run()
} else {
fmt.Println(err)
exitcode = 1
}
os.RemoveAll(tmp)
os.Exit(exitcode)
}
func buildPprof() error {
var err error
tmp, err = os.MkdirTemp("", "TestPprof")
if err != nil {
return fmt.Errorf("TempDir failed: %v", err)
}
pprofExe = filepath.Join(tmp, "testpprof.exe")
gotool, err := testenv.GoTool()
if err != nil {
return err
}
out, err := exec.Command(gotool, "build", "-o", pprofExe, "cmd/pprof").CombinedOutput()
if err != nil {
os.RemoveAll(tmp)
return fmt.Errorf("go build -o %v cmd/pprof: %v\n%s", pprofExe, err, string(out))
}
return nil
}
// See also runtime/pprof.cpuProfilingBroken.
func mustHaveCPUProfiling(t *testing.T) {
switch runtime.GOOS {
case "plan9":
t.Skipf("skipping on %s, unimplemented", runtime.GOOS)
case "aix":
t.Skipf("skipping on %s, issue 45170", runtime.GOOS)
case "ios", "dragonfly", "netbsd", "illumos", "solaris":
t.Skipf("skipping on %s, issue 13841", runtime.GOOS)
case "openbsd":
if runtime.GOARCH == "arm" || runtime.GOARCH == "arm64" {
t.Skipf("skipping on %s/%s, issue 13841", runtime.GOOS, runtime.GOARCH)
}
}
}
func mustHaveDisasm(t *testing.T) {
switch runtime.GOARCH {
case "loong64":
t.Skipf("skipping on %s.", runtime.GOARCH)
case "mips", "mipsle", "mips64", "mips64le":
t.Skipf("skipping on %s, issue 12559", runtime.GOARCH)
case "riscv64":
t.Skipf("skipping on %s, issue 36738", runtime.GOARCH)
case "s390x":
t.Skipf("skipping on %s, issue 15255", runtime.GOARCH)
}
// Skip PIE platforms, pprof can't disassemble PIE.
if runtime.GOOS == "windows" {
t.Skipf("skipping on %s, issue 46639", runtime.GOOS)
}
if runtime.GOOS == "darwin" && runtime.GOARCH == "arm64" {
t.Skipf("skipping on %s/%s, issue 46639", runtime.GOOS, runtime.GOARCH)
}
}
// TestDisasm verifies that cmd/pprof can successfully disassemble functions.
//
// This is a regression test for issue 46636.
func TestDisasm(t *testing.T) {
mustHaveCPUProfiling(t)
mustHaveDisasm(t)
testenv.MustHaveGoBuild(t)
if runtime.GOARCH == "arm64" {
// Fixed at tip (issue 56574). Skip for Go 1.19 release branch.
testenv.SkipFlaky(t, 60637)
}
tmpdir := t.TempDir()
cpuExe := filepath.Join(tmpdir, "cpu.exe")
cmd := exec.Command(testenv.GoToolPath(t), "build", "-o", cpuExe, "cpu.go")
cmd.Dir = "testdata/"
out, err := cmd.CombinedOutput()
if err != nil {
t.Fatalf("build failed: %v\n%s", err, out)
}
profile := filepath.Join(tmpdir, "cpu.pprof")
cmd = exec.Command(cpuExe, "-output", profile)
out, err = cmd.CombinedOutput()
if err != nil {
t.Fatalf("cpu failed: %v\n%s", err, out)
}
cmd = exec.Command(pprofExe, "-disasm", "main.main", cpuExe, profile)
out, err = cmd.CombinedOutput()
if err != nil {
t.Fatalf("pprof failed: %v\n%s", err, out)
}
sout := string(out)
want := "ROUTINE ======================== main.main"
if !strings.Contains(sout, want) {
t.Errorf("pprof disasm got %s want contains %q", sout, want)
}
}
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