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// Copyright (c) 2019 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "shell/browser/api/process_metric.h"
#include <memory>
#include <utility>
#include "third_party/abseil-cpp/absl/types/optional.h"
#if BUILDFLAG(IS_WIN)
#include <windows.h>
#include <psapi.h>
#include "base/win/win_util.h"
#endif
#if BUILDFLAG(IS_MAC)
#include <mach/mach.h>
#include "base/process/port_provider_mac.h"
#include "content/public/browser/browser_child_process_host.h"
extern "C" int sandbox_check(pid_t pid, const char* operation, int type, ...);
namespace {
mach_port_t TaskForPid(pid_t pid) {
mach_port_t task = MACH_PORT_NULL;
if (auto* port_provider = content::BrowserChildProcessHost::GetPortProvider())
task = port_provider->TaskForPid(pid);
if (task == MACH_PORT_NULL && pid == getpid())
task = mach_task_self();
return task;
}
absl::optional<mach_task_basic_info_data_t> GetTaskInfo(mach_port_t task) {
if (task == MACH_PORT_NULL)
return absl::nullopt;
mach_task_basic_info_data_t info = {};
mach_msg_type_number_t count = MACH_TASK_BASIC_INFO_COUNT;
kern_return_t kr = task_info(task, MACH_TASK_BASIC_INFO,
reinterpret_cast<task_info_t>(&info), &count);
return (kr == KERN_SUCCESS) ? absl::make_optional(info) : absl::nullopt;
}
} // namespace
#endif // BUILDFLAG(IS_MAC)
namespace electron {
ProcessMetric::ProcessMetric(int type,
base::ProcessHandle handle,
std::unique_ptr<base::ProcessMetrics> metrics,
const std::string& service_name,
const std::string& name) {
this->type = type;
this->metrics = std::move(metrics);
this->service_name = service_name;
this->name = name;
#if BUILDFLAG(IS_WIN)
HANDLE duplicate_handle = INVALID_HANDLE_VALUE;
::DuplicateHandle(::GetCurrentProcess(), handle, ::GetCurrentProcess(),
&duplicate_handle, 0, false, DUPLICATE_SAME_ACCESS);
this->process = base::Process(duplicate_handle);
#else
this->process = base::Process(handle);
#endif
}
ProcessMetric::~ProcessMetric() = default;
#if BUILDFLAG(IS_WIN)
ProcessMemoryInfo ProcessMetric::GetMemoryInfo() const {
ProcessMemoryInfo result;
PROCESS_MEMORY_COUNTERS_EX info = {};
if (::GetProcessMemoryInfo(process.Handle(),
reinterpret_cast<PROCESS_MEMORY_COUNTERS*>(&info),
sizeof(info))) {
result.working_set_size = info.WorkingSetSize;
result.peak_working_set_size = info.PeakWorkingSetSize;
result.private_bytes = info.PrivateUsage;
}
return result;
}
ProcessIntegrityLevel ProcessMetric::GetIntegrityLevel() const {
HANDLE token = nullptr;
if (!::OpenProcessToken(process.Handle(), TOKEN_QUERY, &token)) {
return ProcessIntegrityLevel::kUnknown;
}
base::win::ScopedHandle token_scoped(token);
DWORD token_info_length = 0;
if (::GetTokenInformation(token, TokenIntegrityLevel, nullptr, 0,
&token_info_length) ||
::GetLastError() != ERROR_INSUFFICIENT_BUFFER) {
return ProcessIntegrityLevel::kUnknown;
}
auto token_label_bytes = std::make_unique<char[]>(token_info_length);
auto* token_label =
reinterpret_cast<TOKEN_MANDATORY_LABEL*>(token_label_bytes.get());
if (!::GetTokenInformation(token, TokenIntegrityLevel, token_label,
token_info_length, &token_info_length)) {
return ProcessIntegrityLevel::kUnknown;
}
DWORD integrity_level = *::GetSidSubAuthority(
token_label->Label.Sid,
static_cast<DWORD>(*::GetSidSubAuthorityCount(token_label->Label.Sid) -
1));
if (integrity_level >= SECURITY_MANDATORY_UNTRUSTED_RID &&
integrity_level < SECURITY_MANDATORY_LOW_RID) {
return ProcessIntegrityLevel::kUntrusted;
}
if (integrity_level >= SECURITY_MANDATORY_LOW_RID &&
integrity_level < SECURITY_MANDATORY_MEDIUM_RID) {
return ProcessIntegrityLevel::kLow;
}
if (integrity_level >= SECURITY_MANDATORY_MEDIUM_RID &&
integrity_level < SECURITY_MANDATORY_HIGH_RID) {
return ProcessIntegrityLevel::kMedium;
}
if (integrity_level >= SECURITY_MANDATORY_HIGH_RID &&
integrity_level < SECURITY_MANDATORY_SYSTEM_RID) {
return ProcessIntegrityLevel::kHigh;
}
return ProcessIntegrityLevel::kUnknown;
}
// static
bool ProcessMetric::IsSandboxed(ProcessIntegrityLevel integrity_level) {
return integrity_level > ProcessIntegrityLevel::kUnknown &&
integrity_level < ProcessIntegrityLevel::kMedium;
}
#elif BUILDFLAG(IS_MAC)
ProcessMemoryInfo ProcessMetric::GetMemoryInfo() const {
ProcessMemoryInfo result;
if (auto info = GetTaskInfo(TaskForPid(process.Pid()))) {
result.working_set_size = info->resident_size;
result.peak_working_set_size = info->resident_size_max;
}
return result;
}
bool ProcessMetric::IsSandboxed() const {
#if defined(MAS_BUILD)
return true;
#else
return sandbox_check(process.Pid(), nullptr, 0) != 0;
#endif
}
#endif // BUILDFLAG(IS_MAC)
} // namespace electron