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/*
* Copyright (C) 2018 The Android Open Source Project
*
* 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.
*/
#include <stdlib.h>
#include <unistd.h>
#include <array>
#include <memory>
#include <vector>
#include <signal.h>
#include "perfetto/ext/base/event_fd.h"
#include "perfetto/ext/base/getopt.h"
#include "perfetto/ext/base/scoped_file.h"
#include "perfetto/ext/base/unix_socket.h"
#include "perfetto/ext/base/watchdog.h"
#include "perfetto/ext/tracing/ipc/default_socket.h"
#include "src/profiling/memory/heapprofd_producer.h"
#include "src/profiling/memory/java_hprof_producer.h"
#include "src/profiling/memory/wire_protocol.h"
#include "perfetto/ext/base/unix_task_runner.h"
// TODO(rsavitski): the task runner watchdog spawns a thread (normally for
// tracking cpu/mem usage) that we don't strictly need.
namespace perfetto {
namespace profiling {
namespace {
int StartCentralHeapprofd();
int GetListeningSocket() {
const char* sock_fd = getenv(kHeapprofdSocketEnvVar);
if (sock_fd == nullptr)
PERFETTO_FATAL("Did not inherit socket from init.");
char* end;
int raw_fd = static_cast<int>(strtol(sock_fd, &end, 10));
if (*end != '\0')
PERFETTO_FATAL("Invalid %s. Expected decimal integer.",
kHeapprofdSocketEnvVar);
return raw_fd;
}
base::EventFd* g_dump_evt = nullptr;
int HeapprofdMain(int argc, char** argv) {
bool cleanup_crash = false;
enum { kCleanupCrash = 256, kTargetPid, kTargetCmd, kInheritFd };
static option long_options[] = {
{"cleanup-after-crash", no_argument, nullptr, kCleanupCrash},
{nullptr, 0, nullptr, 0}};
int c;
while ((c = getopt_long(argc, argv, "", long_options, nullptr)) != -1) {
switch (c) {
case kCleanupCrash:
cleanup_crash = true;
break;
}
}
if (cleanup_crash) {
PERFETTO_LOG(
"Recovering from crash: unsetting heapprofd system properties. "
"Expect SELinux denials for unrelated properties.");
SystemProperties::ResetHeapprofdProperties();
PERFETTO_LOG(
"Finished unsetting heapprofd system properties. "
"SELinux denials about properties are unexpected after "
"this point.");
return 0;
}
// start as a central daemon.
return StartCentralHeapprofd();
}
int StartCentralHeapprofd() {
// We set this up before launching any threads, so we do not have to use a
// std::atomic for g_dump_evt.
g_dump_evt = new base::EventFd();
base::UnixTaskRunner task_runner;
base::Watchdog::GetInstance()->Start(); // crash on exceedingly long tasks
HeapprofdProducer producer(HeapprofdMode::kCentral, &task_runner,
/* exit_when_done= */ false);
int listening_raw_socket = GetListeningSocket();
auto listening_socket = base::UnixSocket::Listen(
base::ScopedFile(listening_raw_socket), &producer.socket_delegate(),
&task_runner, base::SockFamily::kUnix, base::SockType::kStream);
struct sigaction action = {};
action.sa_handler = [](int) { g_dump_evt->Notify(); };
// Allow to trigger a full dump by sending SIGUSR1 to heapprofd.
// This will allow manually deciding when to dump on userdebug.
PERFETTO_CHECK(sigaction(SIGUSR1, &action, nullptr) == 0);
task_runner.AddFileDescriptorWatch(g_dump_evt->fd(), [&producer] {
g_dump_evt->Clear();
producer.DumpAll();
});
producer.ConnectWithRetries(GetProducerSocket());
// TODO(fmayer): Create one producer that manages both heapprofd and Java
// producers, so we do not have two connections to traced.
JavaHprofProducer java_producer(&task_runner);
java_producer.ConnectWithRetries(GetProducerSocket());
task_runner.Run();
return 0;
}
} // namespace
} // namespace profiling
} // namespace perfetto
int main(int argc, char** argv) {
return perfetto::profiling::HeapprofdMain(argc, argv);
}
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