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// Copyright 2016 The Bazel Authors. 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 com.google.devtools.build.lib.sandbox;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.ImmutableSet.Builder;
import com.google.devtools.build.lib.actions.ActionExecutionContext;
import com.google.devtools.build.lib.actions.ActionInput;
import com.google.devtools.build.lib.actions.ActionStatusMessage;
import com.google.devtools.build.lib.actions.ExecException;
import com.google.devtools.build.lib.actions.Executor;
import com.google.devtools.build.lib.actions.Spawn;
import com.google.devtools.build.lib.analysis.BlazeDirectories;
import com.google.devtools.build.lib.analysis.config.BuildConfiguration;
import com.google.devtools.build.lib.buildtool.BuildRequest;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.standalone.StandaloneSpawnStrategy;
import com.google.devtools.build.lib.util.Preconditions;
import com.google.devtools.build.lib.vfs.Path;
import com.google.devtools.build.lib.vfs.PathFragment;
import java.io.IOException;
import java.util.UUID;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.atomic.AtomicInteger;
/** Helper methods that are shared by the different sandboxing strategies in this package. */
final class SandboxHelpers {
static void lazyCleanup(ExecutorService backgroundWorkers, final SandboxRunner runner) {
// By deleting the sandbox directory in the background, we avoid having to wait for it to
// complete before returning from the action, which improves performance.
backgroundWorkers.execute(
new Runnable() {
@Override
public void run() {
try {
while (!Thread.currentThread().isInterrupted()) {
try {
runner.cleanup();
return;
} catch (IOException e2) {
// Sleep & retry.
Thread.sleep(250);
}
}
} catch (InterruptedException e) {
// Mark ourselves as interrupted and then exit.
Thread.currentThread().interrupt();
}
}
});
}
static void fallbackToNonSandboxedExecution(
Spawn spawn, ActionExecutionContext actionExecutionContext, Executor executor)
throws ExecException {
StandaloneSpawnStrategy standaloneStrategy =
Preconditions.checkNotNull(executor.getContext(StandaloneSpawnStrategy.class));
standaloneStrategy.exec(spawn, actionExecutionContext);
}
static void reportSubcommand(Executor executor, Spawn spawn) {
if (executor.reportsSubcommands()) {
executor.reportSubcommand(
Label.print(spawn.getOwner().getLabel())
+ " ["
+ spawn.getResourceOwner().prettyPrint()
+ "]",
spawn.asShellCommand(executor.getExecRoot()));
}
}
static ImmutableSet<PathFragment> getOutputFiles(Spawn spawn) {
Builder<PathFragment> outputFiles = ImmutableSet.builder();
for (PathFragment optionalOutput : spawn.getOptionalOutputFiles()) {
Preconditions.checkArgument(!optionalOutput.isAbsolute());
outputFiles.add(optionalOutput);
}
for (ActionInput output : spawn.getOutputFiles()) {
outputFiles.add(new PathFragment(output.getExecPathString()));
}
return outputFiles.build();
}
static boolean shouldAllowNetwork(BuildRequest buildRequest, Spawn spawn) {
// If we don't run tests, allow network access.
if (!buildRequest.shouldRunTests()) {
return true;
}
// If the Spawn specifically requests network access, allow it.
if (spawn.getExecutionInfo().containsKey("requires-network")) {
return true;
}
// Allow network access, when --java_debug is specified, otherwise we can't connect to the
// remote debug server of the test.
if (buildRequest
.getOptions(BuildConfiguration.Options.class)
.testArguments
.contains("--wrapper_script_flag=--debug")) {
return true;
}
return false;
}
static void postActionStatusMessage(Executor executor, Spawn spawn) {
executor
.getEventBus()
.post(ActionStatusMessage.runningStrategy(spawn.getResourceOwner(), "sandbox"));
}
static Path getSandboxRoot(
BlazeDirectories blazeDirs, String productName, UUID uuid, AtomicInteger execCounter) {
return blazeDirs
.getOutputBase()
.getRelative(productName + "-sandbox")
.getRelative(uuid + "-" + execCounter.getAndIncrement());
}
}
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