a5e0f710c2
"dlv attach": - Spams the terminal - Requires sysctl -w kernel.yama.ptrace_scope=0 - Apparently, does not allow the debugger to inspect variables Test: Manual. Change-Id: I625369effaf5abda2b5d884c8ce5bde7247774eb
124 lines
3.6 KiB
Go
124 lines
3.6 KiB
Go
// Copyright 2015 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 android
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"os/exec"
|
|
"strings"
|
|
"syscall"
|
|
|
|
"android/soong/env"
|
|
)
|
|
|
|
// This file supports dependencies on environment variables. During build manifest generation,
|
|
// any dependency on an environment variable is added to a list. During the singleton phase
|
|
// a JSON file is written containing the current value of all used environment variables.
|
|
// The next time the top-level build script is run, it uses the soong_env executable to
|
|
// compare the contents of the environment variables, rewriting the file if necessary to cause
|
|
// a manifest regeneration.
|
|
|
|
var originalEnv map[string]string
|
|
var soongDelveListen string
|
|
var soongDelvePath string
|
|
var soongDelveEnv []string
|
|
|
|
func init() {
|
|
// Delve support needs to read this environment variable very early, before NewConfig has created a way to
|
|
// access originalEnv with dependencies. Store the value where soong_build can find it, it will manually
|
|
// ensure the dependencies are created.
|
|
soongDelveListen = os.Getenv("SOONG_DELVE")
|
|
soongDelvePath, _ = exec.LookPath("dlv")
|
|
|
|
originalEnv = make(map[string]string)
|
|
soongDelveEnv = []string{}
|
|
for _, env := range os.Environ() {
|
|
idx := strings.IndexRune(env, '=')
|
|
if idx != -1 {
|
|
originalEnv[env[:idx]] = env[idx+1:]
|
|
if env[:idx] != "SOONG_DELVE" {
|
|
soongDelveEnv = append(soongDelveEnv, env)
|
|
}
|
|
}
|
|
}
|
|
|
|
// Clear the environment to prevent use of os.Getenv(), which would not provide dependencies on environment
|
|
// variable values. The environment is available through ctx.Config().Getenv, ctx.Config().IsEnvTrue, etc.
|
|
os.Clearenv()
|
|
}
|
|
|
|
func ReexecWithDelveMaybe() {
|
|
if soongDelveListen == "" {
|
|
return
|
|
}
|
|
|
|
if soongDelvePath == "" {
|
|
fmt.Fprintln(os.Stderr, "SOONG_DELVE is set but failed to find dlv")
|
|
os.Exit(1)
|
|
}
|
|
dlvArgv := []string{
|
|
soongDelvePath,
|
|
"--listen=:" + soongDelveListen,
|
|
"--headless=true",
|
|
"--api-version=2",
|
|
"exec",
|
|
os.Args[0],
|
|
"--",
|
|
}
|
|
dlvArgv = append(dlvArgv, os.Args[1:]...)
|
|
os.Chdir(absSrcDir)
|
|
syscall.Exec(soongDelvePath, dlvArgv, soongDelveEnv)
|
|
fmt.Fprintln(os.Stderr, "exec() failed while trying to reexec with Delve")
|
|
os.Exit(1)
|
|
}
|
|
|
|
// getenv checks either os.Getenv or originalEnv so that it works before or after the init()
|
|
// function above. It doesn't add any dependencies on the environment variable, so it should
|
|
// only be used for values that won't change. For values that might change use ctx.Config().Getenv.
|
|
func getenv(key string) string {
|
|
if originalEnv == nil {
|
|
return os.Getenv(key)
|
|
} else {
|
|
return originalEnv[key]
|
|
}
|
|
}
|
|
|
|
func EnvSingleton() Singleton {
|
|
return &envSingleton{}
|
|
}
|
|
|
|
type envSingleton struct{}
|
|
|
|
func (c *envSingleton) GenerateBuildActions(ctx SingletonContext) {
|
|
envDeps := ctx.Config().EnvDeps()
|
|
|
|
envFile := PathForOutput(ctx, ".soong.environment")
|
|
if ctx.Failed() {
|
|
return
|
|
}
|
|
|
|
data, err := env.EnvFileContents(envDeps)
|
|
if err != nil {
|
|
ctx.Errorf(err.Error())
|
|
}
|
|
|
|
err = WriteFileToOutputDir(envFile, data, 0666)
|
|
if err != nil {
|
|
ctx.Errorf(err.Error())
|
|
}
|
|
|
|
ctx.AddNinjaFileDeps(envFile.String())
|
|
}
|