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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 (
"internal/testenv"
"os"
"path/filepath"
"runtime"
"strings"
"sync"
"testing"
)
// TestMain executes the test binary as the pprof command if
// GO_PPROFTEST_IS_PPROF is set, and runs the tests otherwise.
func TestMain(m *testing.M) {
if os.Getenv("GO_PPROFTEST_IS_PPROF") != "" {
main()
os.Exit(0)
}
os.Setenv("GO_PPROFTEST_IS_PPROF", "1") // Set for subprocesses to inherit.
os.Exit(m.Run())
}
// pprofPath returns the path to the "pprof" binary to run.
func pprofPath(t testing.TB) string {
t.Helper()
testenv.MustHaveExec(t)
pprofPathOnce.Do(func() {
pprofExePath, pprofPathErr = os.Executable()
})
if pprofPathErr != nil {
t.Fatal(pprofPathErr)
}
return pprofExePath
}
var (
pprofPathOnce sync.Once
pprofExePath string
pprofPathErr error
)
// 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)
}
// pprof can only disassemble PIE on some platforms.
// Skip the ones it can't handle yet.
if runtime.GOOS == "android" && runtime.GOARCH == "arm" {
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)
tmpdir := t.TempDir()
cpuExe := filepath.Join(tmpdir, "cpu.exe")
cmd := testenv.Command(t, 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 = testenv.Command(t, cpuExe, "-output", profile)
out, err = cmd.CombinedOutput()
if err != nil {
t.Fatalf("cpu failed: %v\n%s", err, out)
}
cmd = testenv.Command(t, pprofPath(t), "-disasm", "main.main", cpuExe, profile)
out, err = cmd.CombinedOutput()
if err != nil {
t.Errorf("pprof -disasm failed: %v\n%s", err, out)
// Try to print out profile content for debugging.
cmd = testenv.Command(t, pprofPath(t), "-raw", cpuExe, profile)
out, err = cmd.CombinedOutput()
if err != nil {
t.Logf("pprof -raw failed: %v\n%s", err, out)
} else {
t.Logf("profile content:\n%s", out)
}
return
}
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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