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// Copyright 2017 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/process/process.h"
#include <zircon/process.h>
#include <zircon/syscalls.h>
#include "base/debug/activity_tracker.h"
#include "base/fuchsia/default_job.h"
#include "base/strings/stringprintf.h"
namespace base {
Process::Process(ProcessHandle handle)
: process_(handle), is_current_process_(false) {
CHECK_NE(handle, zx_process_self());
}
Process::~Process() {
Close();
}
Process::Process(Process&& other)
: process_(std::move(other.process_)),
is_current_process_(other.is_current_process_) {
other.is_current_process_ = false;
}
Process& Process::operator=(Process&& other) {
process_ = std::move(other.process_);
is_current_process_ = other.is_current_process_;
other.is_current_process_ = false;
return *this;
}
// static
Process Process::Current() {
Process process;
process.is_current_process_ = true;
return process;
}
// static
Process Process::Open(ProcessId pid) {
if (pid == GetCurrentProcId())
return Current();
// While a process with object id |pid| might exist, the job returned by
// zx_job_default() might not contain it, so this call can fail.
ScopedZxHandle handle;
zx_status_t status = zx_object_get_child(
GetDefaultJob(), pid, ZX_RIGHT_SAME_RIGHTS, handle.receive());
if (status != ZX_OK) {
DLOG(ERROR) << "zx_object_get_child failed: " << status;
return Process();
}
return Process(handle.release());
}
// static
Process Process::OpenWithExtraPrivileges(ProcessId pid) {
// No privileges to set.
return Open(pid);
}
// static
Process Process::DeprecatedGetProcessFromHandle(ProcessHandle handle) {
DCHECK_NE(handle, GetCurrentProcessHandle());
ScopedZxHandle out;
if (zx_handle_duplicate(handle, ZX_RIGHT_SAME_RIGHTS, out.receive()) !=
ZX_OK) {
DLOG(ERROR) << "zx_handle_duplicate failed: " << handle;
return Process();
}
return Process(out.release());
}
// static
bool Process::CanBackgroundProcesses() {
return false;
}
// static
void Process::TerminateCurrentProcessImmediately(int exit_code) {
_exit(exit_code);
}
bool Process::IsValid() const {
return process_.is_valid() || is_current();
}
ProcessHandle Process::Handle() const {
return is_current_process_ ? zx_process_self() : process_.get();
}
Process Process::Duplicate() const {
if (is_current())
return Current();
if (!IsValid())
return Process();
ScopedZxHandle out;
if (zx_handle_duplicate(process_.get(), ZX_RIGHT_SAME_RIGHTS,
out.receive()) != ZX_OK) {
DLOG(ERROR) << "zx_handle_duplicate failed: " << process_.get();
return Process();
}
return Process(out.release());
}
ProcessId Process::Pid() const {
DCHECK(IsValid());
return GetProcId(Handle());
}
bool Process::is_current() const {
return is_current_process_;
}
void Process::Close() {
is_current_process_ = false;
process_.reset();
}
bool Process::Terminate(int exit_code, bool wait) const {
// exit_code isn't supportable. https://crbug.com/753490.
zx_status_t status = zx_task_kill(Handle());
// TODO(scottmg): Put these LOG/CHECK back to DLOG/DCHECK after
// https://crbug.com/750756 is diagnosed.
if (status == ZX_OK && wait) {
zx_signals_t signals;
status = zx_object_wait_one(Handle(), ZX_TASK_TERMINATED,
zx_deadline_after(ZX_SEC(60)), &signals);
if (status != ZX_OK) {
LOG(ERROR) << "Error waiting for process exit: " << status;
} else {
CHECK(signals & ZX_TASK_TERMINATED);
}
} else if (status != ZX_OK) {
LOG(ERROR) << "Unable to terminate process: " << status;
}
return status >= 0;
}
bool Process::WaitForExit(int* exit_code) const {
return WaitForExitWithTimeout(TimeDelta::Max(), exit_code);
}
bool Process::WaitForExitWithTimeout(TimeDelta timeout, int* exit_code) const {
if (is_current_process_)
return false;
// Record the event that this thread is blocking upon (for hang diagnosis).
base::debug::ScopedProcessWaitActivity process_activity(this);
zx_time_t deadline = timeout == TimeDelta::Max()
? ZX_TIME_INFINITE
: (TimeTicks::Now() + timeout).ToZxTime();
// TODO(scottmg): https://crbug.com/755282
const bool kOnBot = getenv("CHROME_HEADLESS") != nullptr;
if (kOnBot) {
LOG(ERROR) << base::StringPrintf(
"going to wait for process %x (deadline=%zu, now=%zu)", process_.get(),
deadline, TimeTicks::Now().ToZxTime());
}
zx_signals_t signals_observed = 0;
zx_status_t status = zx_object_wait_one(process_.get(), ZX_TASK_TERMINATED,
deadline, &signals_observed);
// TODO(scottmg): Make these LOGs into DLOGs after https://crbug.com/750756 is
// fixed.
if (status != ZX_OK && status != ZX_ERR_TIMED_OUT) {
LOG(ERROR) << "zx_object_wait_one failed, status=" << status;
return false;
}
if (status == ZX_ERR_TIMED_OUT) {
zx_time_t now = TimeTicks::Now().ToZxTime();
LOG(ERROR) << "zx_object_wait_one timed out, signals=" << signals_observed
<< ", deadline=" << deadline << ", now=" << now
<< ", delta=" << (now - deadline);
return false;
}
zx_info_process_t proc_info;
status = zx_object_get_info(process_.get(), ZX_INFO_PROCESS, &proc_info,
sizeof(proc_info), nullptr, nullptr);
if (status != ZX_OK) {
LOG(ERROR) << "zx_object_get_info failed, status=" << status;
if (exit_code)
*exit_code = -1;
return false;
}
if (exit_code)
*exit_code = proc_info.return_code;
return true;
}
void Process::Exited(int exit_code) const {}
bool Process::IsProcessBackgrounded() const {
// See SetProcessBackgrounded().
DCHECK(IsValid());
return false;
}
bool Process::SetProcessBackgrounded(bool value) {
// No process priorities on Fuchsia. TODO(fuchsia): See MG-783, and update
// this later if priorities are implemented.
return false;
}
int Process::GetPriority() const {
DCHECK(IsValid());
// No process priorities on Fuchsia.
return 0;
}
} // namespace base
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