crashpad_client_linux.cc | Explore in Territory

// Copyright 2018 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 "client/crashpad_client.h"

#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <linux/futex.h>
#include <pthread.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <sys/prctl.h>
#include <sys/socket.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>

#include <atomic>

#include "base/check_op.h"
#include "base/logging.h"
#include "base/strings/stringprintf.h"
#include "build/build_config.h"
#include "build/chromeos_buildflags.h"
#include "client/client_argv_handling.h"
#include "third_party/lss/lss.h"
#include "util/file/file_io.h"
#include "util/file/filesystem.h"
#include "util/linux/exception_handler_client.h"
#include "util/linux/exception_information.h"
#include "util/linux/scoped_pr_set_dumpable.h"
#include "util/linux/scoped_pr_set_ptracer.h"
#include "util/linux/socket.h"
#include "util/misc/address_sanitizer.h"
#include "util/misc/from_pointer_cast.h"
#include "util/posix/scoped_mmap.h"
#include "util/posix/signals.h"
#include "util/posix/spawn_subprocess.h"

namespace crashpad {

namespace {

std::string FormatArgumentInt(const std::string& name, int value) { … }

std::string FormatArgumentAddress(const std::string& name, const void* addr) { … }

#if BUILDFLAG(IS_ANDROID)

std::vector<std::string> BuildAppProcessArgs(
    const std::string& class_name,
    const base::FilePath& database,
    const base::FilePath& metrics_dir,
    const std::string& url,
    const std::map<std::string, std::string>& annotations,
    const std::vector<std::string>& arguments,
    int socket) {
#if defined(ARCH_CPU_64_BITS)
  static constexpr char kAppProcess[] = "/system/bin/app_process64";
#else
  static constexpr char kAppProcess[] = "/system/bin/app_process32";
#endif

  std::vector<std::string> argv;
  argv.push_back(kAppProcess);
  argv.push_back("/system/bin");
  argv.push_back("--application");
  argv.push_back(class_name);

  std::vector<std::string> handler_argv =
      BuildHandlerArgvStrings(base::FilePath(kAppProcess),
                              database,
                              metrics_dir,
                              url,
                              annotations,
                              arguments);

  if (socket != kInvalidFileHandle) {
    handler_argv.push_back(FormatArgumentInt("initial-client-fd", socket));
  }

  argv.insert(argv.end(), handler_argv.begin(), handler_argv.end());
  return argv;
}

std::vector<std::string> BuildArgsToLaunchWithLinker(
    const std::string& handler_trampoline,
    const std::string& handler_library,
    bool is_64_bit,
    const base::FilePath& database,
    const base::FilePath& metrics_dir,
    const std::string& url,
    const std::map<std::string, std::string>& annotations,
    const std::vector<std::string>& arguments,
    int socket) {
  std::vector<std::string> argv;
  if (is_64_bit) {
    argv.push_back("/system/bin/linker64");
  } else {
    argv.push_back("/system/bin/linker");
  }
  argv.push_back(handler_trampoline);
  argv.push_back(handler_library);

  std::vector<std::string> handler_argv = BuildHandlerArgvStrings(
      base::FilePath(), database, metrics_dir, url, annotations, arguments);

  if (socket != kInvalidFileHandle) {
    handler_argv.push_back(FormatArgumentInt("initial-client-fd", socket));
  }

  argv.insert(argv.end(), handler_argv.begin() + 1, handler_argv.end());
  return argv;
}

#endif  // BUILDFLAG(IS_ANDROID)

LastChanceHandler;

// A base class for Crashpad signal handler implementations.
class SignalHandler { … };
SignalHandler* SignalHandler::handler_ = …;

// Launches a single use handler to snapshot this process.
class LaunchAtCrashHandler : public SignalHandler { … };

class RequestCrashDumpHandler : public SignalHandler { … };

}  // namespace

CrashpadClient::CrashpadClient() { … }

CrashpadClient::~CrashpadClient() { … }

bool CrashpadClient::StartHandler(
    const base::FilePath& handler,
    const base::FilePath& database,
    const base::FilePath& metrics_dir,
    const std::string& url,
    const std::map<std::string, std::string>& annotations,
    const std::vector<std::string>& arguments,
    bool restartable,
    bool asynchronous_start,
    const std::vector<base::FilePath>& attachments) { … }

#if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS)
// static
bool CrashpadClient::GetHandlerSocket(int* sock, pid_t* pid) { … }

bool CrashpadClient::SetHandlerSocket(ScopedFileHandle sock, pid_t pid) { … }

// static
bool CrashpadClient::InitializeSignalStackForThread() { … }
#endif  // BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_LINUX) ||
        // BUILDFLAG(IS_CHROMEOS)

#if BUILDFLAG(IS_ANDROID)

bool CrashpadClient::StartJavaHandlerAtCrash(
    const std::string& class_name,
    const std::vector<std::string>* env,
    const base::FilePath& database,
    const base::FilePath& metrics_dir,
    const std::string& url,
    const std::map<std::string, std::string>& annotations,
    const std::vector<std::string>& arguments) {
  std::vector<std::string> argv = BuildAppProcessArgs(class_name,
                                                      database,
                                                      metrics_dir,
                                                      url,
                                                      annotations,
                                                      arguments,
                                                      kInvalidFileHandle);

  auto signal_handler = LaunchAtCrashHandler::Get();
  return signal_handler->Initialize(&argv, env, &unhandled_signals_);
}

// static
bool CrashpadClient::StartJavaHandlerForClient(
    const std::string& class_name,
    const std::vector<std::string>* env,
    const base::FilePath& database,
    const base::FilePath& metrics_dir,
    const std::string& url,
    const std::map<std::string, std::string>& annotations,
    const std::vector<std::string>& arguments,
    int socket) {
  std::vector<std::string> argv = BuildAppProcessArgs(
      class_name, database, metrics_dir, url, annotations, arguments, socket);
  return SpawnSubprocess(argv, env, socket, false, nullptr);
}

bool CrashpadClient::StartHandlerWithLinkerAtCrash(
    const std::string& handler_trampoline,
    const std::string& handler_library,
    bool is_64_bit,
    const std::vector<std::string>* env,
    const base::FilePath& database,
    const base::FilePath& metrics_dir,
    const std::string& url,
    const std::map<std::string, std::string>& annotations,
    const std::vector<std::string>& arguments) {
  std::vector<std::string> argv =
      BuildArgsToLaunchWithLinker(handler_trampoline,
                                  handler_library,
                                  is_64_bit,
                                  database,
                                  metrics_dir,
                                  url,
                                  annotations,
                                  arguments,
                                  kInvalidFileHandle);
  auto signal_handler = LaunchAtCrashHandler::Get();
  return signal_handler->Initialize(&argv, env, &unhandled_signals_);
}

// static
bool CrashpadClient::StartHandlerWithLinkerForClient(
    const std::string& handler_trampoline,
    const std::string& handler_library,
    bool is_64_bit,
    const std::vector<std::string>* env,
    const base::FilePath& database,
    const base::FilePath& metrics_dir,
    const std::string& url,
    const std::map<std::string, std::string>& annotations,
    const std::vector<std::string>& arguments,
    int socket) {
  std::vector<std::string> argv =
      BuildArgsToLaunchWithLinker(handler_trampoline,
                                  handler_library,
                                  is_64_bit,
                                  database,
                                  metrics_dir,
                                  url,
                                  annotations,
                                  arguments,
                                  socket);
  return SpawnSubprocess(argv, env, socket, false, nullptr);
}

#endif

bool CrashpadClient::StartHandlerAtCrash(
    const base::FilePath& handler,
    const base::FilePath& database,
    const base::FilePath& metrics_dir,
    const std::string& url,
    const std::map<std::string, std::string>& annotations,
    const std::vector<std::string>& arguments,
    const std::vector<base::FilePath>& attachments) { … }

// static
bool CrashpadClient::StartHandlerForClient(
    const base::FilePath& handler,
    const base::FilePath& database,
    const base::FilePath& metrics_dir,
    const std::string& url,
    const std::map<std::string, std::string>& annotations,
    const std::vector<std::string>& arguments,
    int socket) { … }

// static
void CrashpadClient::DumpWithoutCrash(NativeCPUContext* context) { … }

// static
void CrashpadClient::CrashWithoutDump(const std::string& message) { … }

// static
void CrashpadClient::SetFirstChanceExceptionHandler(
    FirstChanceHandler handler) { … }

// static
void CrashpadClient::SetLastChanceExceptionHandler(LastChanceHandler handler) { … }

void CrashpadClient::SetUnhandledSignals(const std::set<int>& signals) { … }

#if BUILDFLAG(IS_CHROMEOS_ASH)
// static
void CrashpadClient::SetCrashLoopBefore(uint64_t crash_loop_before_time) {
  auto request_crash_dump_handler = RequestCrashDumpHandler::Get();
  request_crash_dump_handler->SetCrashLoopBefore(crash_loop_before_time);
}
#endif

}  // namespace crashpad
chromium/third_party/crashpad/crashpad/client/crashpad_client_linux.cc
