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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/updater/crash_reporter.h"
#include <algorithm>
#include <iterator>
#include <map>
#include <memory>
#include <optional>
#include <string>
#include <vector>
#include "base/check.h"
#include "base/command_line.h"
#include "base/files/file_path.h"
#include "base/logging.h"
#include "base/no_destructor.h"
#include "base/path_service.h"
#include "base/strings/strcat.h"
#include "base/strings/string_util.h"
#include "base/strings/utf_string_conversions.h"
#include "build/build_config.h"
#include "chrome/updater/constants.h"
#include "chrome/updater/external_constants.h"
#include "chrome/updater/updater_branding.h"
#include "chrome/updater/updater_scope.h"
#include "chrome/updater/util/util.h"
#include "third_party/crashpad/crashpad/client/crashpad_client.h"
#include "third_party/crashpad/crashpad/client/crashpad_info.h"
#include "third_party/crashpad/crashpad/handler/handler_main.h"
#include "url/gurl.h"
namespace updater {
namespace {
crashpad::CrashpadClient& GetCrashpadClient() {
static base::NoDestructor<crashpad::CrashpadClient> crashpad_client;
return *crashpad_client;
}
// Returns the command line arguments to start the crash handler process with.
std::vector<std::string> MakeCrashHandlerArgs(UpdaterScope updater_scope) {
base::CommandLine command_line(base::CommandLine::NO_PROGRAM);
command_line.AppendSwitch(kCrashHandlerSwitch);
if (IsSystemInstall(updater_scope)) {
command_line.AppendSwitch(kSystemSwitch);
}
if (base::CommandLine::ForCurrentProcess()->HasSwitch(kMonitorSelfSwitch)) {
command_line.AppendSwitch(kMonitorSelfSwitch);
if (updater_scope == UpdaterScope::kSystem) {
command_line.AppendSwitchUTF8(kMonitorSelfSwitchArgument,
base::StrCat({"--", kSystemSwitch}));
}
}
// The first element in the command line arguments is the program name,
// which must be skipped.
#if BUILDFLAG(IS_WIN)
std::vector<std::string> args;
std::ranges::transform(++command_line.argv().begin(),
command_line.argv().end(), std::back_inserter(args),
[](const auto& arg) { return base::WideToUTF8(arg); });
return args;
#else
return {++command_line.argv().begin(), command_line.argv().end()};
#endif
}
} // namespace
void StartCrashReporter(UpdaterScope updater_scope,
const std::string& version) {
static bool started = false;
CHECK(!started);
started = true;
base::FilePath handler_path;
base::PathService::Get(base::FILE_EXE, &handler_path);
const std::optional<base::FilePath> database_path =
EnsureCrashDatabasePath(updater_scope);
if (!database_path) {
LOG(ERROR) << "Failed to get the database path.";
return;
}
std::map<std::string, std::string> annotations;
annotations["ver"] = version;
annotations["prod"] = CRASH_PRODUCT_NAME;
// Save dereferenced memory from all registers on the crashing thread.
// Crashpad saves up to 512 bytes per CPU register, and in the worst case,
// ARM64 has 32 registers.
static constexpr uint32_t kIndirectMemoryLimit = 32 * 512;
crashpad::CrashpadInfo::GetCrashpadInfo()
->set_gather_indirectly_referenced_memory(crashpad::TriState::kEnabled,
kIndirectMemoryLimit);
crashpad::CrashpadClient& client = GetCrashpadClient();
std::vector<base::FilePath> attachments;
#if !BUILDFLAG(IS_MAC) // Crashpad does not support attachments on macOS.
std::optional<base::FilePath> log_file = GetLogFilePath(updater_scope);
if (log_file) {
attachments.push_back(*log_file);
}
#endif
if (!client.StartHandler(
handler_path, *database_path,
/*metrics_dir=*/base::FilePath(),
CreateExternalConstants()->CrashUploadURL().possibly_invalid_spec(),
annotations, MakeCrashHandlerArgs(updater_scope),
/*restartable=*/true,
/*asynchronous_start=*/false, attachments)) {
VLOG(1) << "Failed to start handler.";
return;
}
VLOG(1) << "Crash handler launched and ready.";
}
int CrashReporterMain() {
base::CommandLine command_line = *base::CommandLine::ForCurrentProcess();
CHECK(command_line.HasSwitch(kCrashHandlerSwitch));
// Because of https://bugs.chromium.org/p/crashpad/issues/detail?id=82,
// Crashpad fails on the presence of flags it doesn't handle.
command_line.RemoveSwitch(kCrashHandlerSwitch);
command_line.RemoveSwitch(kSystemSwitch);
command_line.RemoveSwitch(kEnableLoggingSwitch);
command_line.RemoveSwitch(kLoggingModuleSwitch);
const std::vector<base::CommandLine::StringType> argv = command_line.argv();
// |storage| must be declared before |argv_as_utf8|, to ensure it outlives
// |argv_as_utf8|, which will hold pointers into |storage|.
std::vector<std::string> storage;
auto argv_as_utf8 = std::make_unique<char*[]>(argv.size() + 1);
storage.reserve(argv.size());
for (size_t i = 0; i < argv.size(); ++i) {
#if BUILDFLAG(IS_WIN)
storage.push_back(base::WideToUTF8(argv[i]));
#else
storage.push_back(argv[i]);
#endif
argv_as_utf8[i] = &storage[i][0];
}
argv_as_utf8[argv.size()] = nullptr;
return crashpad::HandlerMain(argv.size(), argv_as_utf8.get(),
/*user_stream_sources=*/nullptr);
}
} // namespace updater
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