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/**
* Copyright (C) 2018-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#include "mongo/transport/service_executor_utils.h"
#include <fmt/format.h>
#include <functional>
#include <memory>
#include "mongo/logv2/log.h"
#include "mongo/stdx/thread.h"
#include "mongo/transport/service_executor.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/debug_util.h"
#include "mongo/util/scopeguard.h"
#include "mongo/util/thread_safety_context.h"
#if !defined(_WIN32)
#include <sys/resource.h>
#include <unistd.h>
#endif
#define MONGO_LOGV2_DEFAULT_COMPONENT ::mongo::logv2::LogComponent::kDefault
#if !defined(__has_feature)
#define __has_feature(x) 0
#endif
namespace mongo::transport {
namespace {
using namespace fmt::literals;
void* runFunc(void* ctx) {
auto taskPtr =
std::unique_ptr<unique_function<void()>>(static_cast<unique_function<void()>*>(ctx));
(*taskPtr)();
return nullptr;
}
} // namespace
Status launchServiceWorkerThread(unique_function<void()> task) {
try {
#if defined(_WIN32)
stdx::thread([task = std::move(task)]() mutable { task(); }).detach();
#else
pthread_attr_t attrs;
pthread_attr_init(&attrs);
ScopeGuard attrsGuard([&attrs] { pthread_attr_destroy(&attrs); });
pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED);
static const rlim_t kStackSize =
1024 * 1024; // if we change this we need to update the warning
struct rlimit limits;
invariant(getrlimit(RLIMIT_STACK, &limits) == 0);
if (limits.rlim_cur >= kStackSize) {
size_t stackSizeToSet = kStackSize;
#if !defined(_WIN32) && (__SANITIZE_ADDRESS__ || __has_feature(address_sanitizer))
// If we are using address sanitizer, we set the stack at
// ~75% (rounded up to a multiple of the page size) of our
// usual desired. Since ASAN is known to use stack more
// aggressively and should positively detect stack overflow,
// this gives us increased confidence during testing that we
// aren't flirting with our real 1MB limit for any tested
// workloads. Note: This calculation only works on POSIX
// platforms. If we ever decide to use the MSVC
// implementation of ASAN, we will need to revisit it.
long page_size = sysconf(_SC_PAGE_SIZE);
stackSizeToSet =
((((stackSizeToSet * 3) >> 2) + page_size - 1) / page_size) * page_size;
#endif
int failed = pthread_attr_setstacksize(&attrs, stackSizeToSet);
if (failed) {
LOGV2_WARNING(22949,
"pthread_attr_setstacksize failed: {error}",
"pthread_attr_setstacksize failed",
"error"_attr = errorMessage(posixError(failed)));
}
} else {
LOGV2_WARNING(22950,
"Stack size set to {stackSizeKiB}KiB. We suggest 1024KiB",
"Stack size not set to suggested 1024KiB",
"stackSizeKiB"_attr = (limits.rlim_cur / 1024));
}
// Wrap the user-specified `task` so it runs with an installed `sigaltstack`.
task = [sigAltStackController = std::make_shared<stdx::support::SigAltStackController>(),
f = std::move(task)]() mutable {
auto sigAltStackGuard = sigAltStackController->makeInstallGuard();
f();
};
pthread_t thread;
auto ctx = std::make_unique<unique_function<void()>>(std::move(task));
ThreadSafetyContext::getThreadSafetyContext()->onThreadCreate();
int failed = pthread_create(&thread, &attrs, runFunc, ctx.get());
if (failed > 0) {
LOGV2_ERROR_OPTIONS(4850900,
{logv2::UserAssertAfterLog()},
"pthread_create failed: error: {error}",
"pthread_create failed",
"error"_attr = errorMessage(posixError(failed)));
} else if (failed < 0) {
auto ec = lastPosixError();
LOGV2_ERROR_OPTIONS(4850901,
{logv2::UserAssertAfterLog()},
"pthread_create failed with a negative return code: {code}, errno: "
"{errno}, error: {error}",
"pthread_create failed with a negative return code",
"code"_attr = failed,
"errno"_attr = ec.value(),
"error"_attr = errorMessage(ec));
}
ctx.release();
#endif
} catch (const std::exception& e) {
LOGV2_ERROR(22948, "Thread creation failed", "error"_attr = e.what());
return {ErrorCodes::InternalError,
format(FMT_STRING("Failed to create service entry worker thread: {}"), e.what())};
}
return Status::OK();
}
} // namespace mongo::transport
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