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// Copyright 2019 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package build
import (
"fmt"
"math/rand"
"os"
"path/filepath"
"syscall"
"time"
"android/soong/ui/metrics"
)
const (
rbeLeastNProcs = 2500
rbeLeastNFiles = 16000
// prebuilt RBE binaries
bootstrapCmd = "bootstrap"
// RBE metrics proto buffer file
rbeMetricsPBFilename = "rbe_metrics.pb"
defaultOutDir = "out"
)
func rbeCommand(ctx Context, config Config, rbeCmd string) string {
var cmdPath string
if rbeDir := config.rbeDir(); rbeDir != "" {
cmdPath = filepath.Join(rbeDir, rbeCmd)
} else {
ctx.Fatalf("rbe command path not found")
}
if _, err := os.Stat(cmdPath); err != nil && os.IsNotExist(err) {
ctx.Fatalf("rbe command %q not found", rbeCmd)
}
return cmdPath
}
func sockAddr(dir string) (string, error) {
maxNameLen := len(syscall.RawSockaddrUnix{}.Path)
rand.Seed(time.Now().UnixNano())
base := fmt.Sprintf("reproxy_%v.sock", rand.Intn(1000))
name := filepath.Join(dir, base)
if len(name) < maxNameLen {
return name, nil
}
name = filepath.Join("/tmp", base)
if len(name) < maxNameLen {
return name, nil
}
return "", fmt.Errorf("cannot generate a proxy socket address shorter than the limit of %v", maxNameLen)
}
func getRBEVars(ctx Context, config Config) map[string]string {
vars := map[string]string{
"RBE_log_path": config.rbeLogPath(),
"RBE_log_dir": config.logDir(),
"RBE_re_proxy": config.rbeReproxy(),
"RBE_exec_root": config.rbeExecRoot(),
"RBE_output_dir": config.rbeStatsOutputDir(),
}
if config.StartRBE() {
name, err := sockAddr(absPath(ctx, config.TempDir()))
if err != nil {
ctx.Fatalf("Error retrieving socket address: %v", err)
return nil
}
vars["RBE_server_address"] = fmt.Sprintf("unix://%v", name)
}
k, v := config.rbeAuth()
vars[k] = v
return vars
}
func startRBE(ctx Context, config Config) {
ctx.BeginTrace(metrics.RunSetupTool, "rbe_bootstrap")
defer ctx.EndTrace()
if u := ulimitOrFatal(ctx, config, "-u"); u < rbeLeastNProcs {
ctx.Fatalf("max user processes is insufficient: %d; want >= %d.\n", u, rbeLeastNProcs)
}
if n := ulimitOrFatal(ctx, config, "-n"); n < rbeLeastNFiles {
ctx.Fatalf("max open files is insufficient: %d; want >= %d.\n", n, rbeLeastNFiles)
}
cmd := Command(ctx, config, "startRBE bootstrap", rbeCommand(ctx, config, bootstrapCmd))
if output, err := cmd.CombinedOutput(); err != nil {
ctx.Fatalf("rbe bootstrap failed with: %v\n%s\n", err, output)
}
}
func stopRBE(ctx Context, config Config) {
cmd := Command(ctx, config, "stopRBE bootstrap", rbeCommand(ctx, config, bootstrapCmd), "-shutdown")
if output, err := cmd.CombinedOutput(); err != nil {
ctx.Fatalf("rbe bootstrap with shutdown failed with: %v\n%s\n", err, output)
}
}
// DumpRBEMetrics creates a metrics protobuf file containing RBE related metrics.
// The protobuf file is created if RBE is enabled and the proxy service has
// started. The proxy service is shutdown in order to dump the RBE metrics to the
// protobuf file.
func DumpRBEMetrics(ctx Context, config Config, filename string) {
ctx.BeginTrace(metrics.RunShutdownTool, "dump_rbe_metrics")
defer ctx.EndTrace()
// Remove the previous metrics file in case there is a failure or RBE has been
// disable for this run.
os.Remove(filename)
// If RBE is not enabled then there are no metrics to generate.
// If RBE does not require to start, the RBE proxy maybe started
// manually for debugging purpose and can generate the metrics
// afterwards.
if !config.StartRBE() {
return
}
outputDir := config.rbeStatsOutputDir()
if outputDir == "" {
ctx.Fatal("RBE output dir variable not defined. Aborting metrics dumping.")
}
metricsFile := filepath.Join(outputDir, rbeMetricsPBFilename)
// Stop the proxy first in order to generate the RBE metrics protobuf file.
stopRBE(ctx, config)
if metricsFile == filename {
return
}
if _, err := copyFile(metricsFile, filename); err != nil {
ctx.Fatalf("failed to copy %q to %q: %v\n", metricsFile, filename, err)
}
}
// PrintOutDirWarning prints a warning to indicate to the user that
// setting output directory to a path other than "out" in an RBE enabled
// build can cause slow builds.
func PrintOutDirWarning(ctx Context, config Config) {
if config.UseRBE() && config.OutDir() != defaultOutDir {
fmt.Fprintln(ctx.Writer, "")
fmt.Fprintln(ctx.Writer, "\033[33mWARNING:\033[0m")
fmt.Fprintln(ctx.Writer, fmt.Sprintf("Setting OUT_DIR to a path other than %v may result in slow RBE builds.", defaultOutDir))
fmt.Fprintln(ctx.Writer, "See http://go/android_rbe_out_dir for a workaround.")
fmt.Fprintln(ctx.Writer, "")
}
}
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