chromium/third_party/crashpad/crashpad/handler/linux/exception_handler_server.cc

// Copyright 2017 The Crashpad Authors
//
// 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 "handler/linux/exception_handler_server.h"

#include <errno.h>
#include <linux/capability.h>
#include <sys/epoll.h>
#include <sys/eventfd.h>
#include <sys/socket.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

#include <utility>

#include "base/check_op.h"
#include "base/compiler_specific.h"
#include "base/logging.h"
#include "base/posix/eintr_wrapper.h"
#include "base/strings/string_number_conversions.h"
#include "base/types/cxx23_to_underlying.h"
#include "build/build_config.h"
#include "util/file/file_io.h"
#include "util/file/filesystem.h"
#include "util/linux/proc_task_reader.h"
#include "util/linux/socket.h"

namespace crashpad {

namespace {

// Log an error for a socket after an EPOLLERR.
void LogSocketError(int sock) { … }

enum class PtraceScope { … };

PtraceScope GetPtraceScope() { … }

bool HaveCapSysPtrace() { … }

bool SendMessageToClient(
    int client_sock,
    ExceptionHandlerProtocol::ServerToClientMessage::Type type) { … }

int tgkill(pid_t pid, pid_t tid, int signo) { … }

void SendSIGCONT(pid_t pid, pid_t tid) { … }

bool SendCredentials(int client_sock) { … }

class PtraceStrategyDeciderImpl : public PtraceStrategyDecider { … };

}  // namespace

ExceptionHandlerServer::ExceptionHandlerServer()
    : … { … }

ExceptionHandlerServer::~ExceptionHandlerServer() = default;

void ExceptionHandlerServer::SetPtraceStrategyDecider(
    std::unique_ptr<PtraceStrategyDecider> decider) { … }

bool ExceptionHandlerServer::InitializeWithClient(ScopedFileHandle sock,
                                                  bool multiple_clients) { … }

void ExceptionHandlerServer::Run(Delegate* delegate) { … }

void ExceptionHandlerServer::Stop() { … }

void ExceptionHandlerServer::HandleEvent(Event* event, uint32_t event_type) { … }

bool ExceptionHandlerServer::InstallClientSocket(ScopedFileHandle socket,
                                                 Event::Type type) { … }

bool ExceptionHandlerServer::UninstallClientSocket(Event* event) { … }

bool ExceptionHandlerServer::ReceiveClientMessage(Event* event) { … }

bool ExceptionHandlerServer::HandleCrashDumpRequest(
    const ucred& creds,
    const ExceptionHandlerProtocol::ClientInformation& client_info,
    VMAddress requesting_thread_stack_address,
    int client_sock,
    bool multiple_clients) { … }

}  // namespace crashpad