// Copyright (c) 2013 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // This file contains routines for gathering resource statistics for processes // running on the system. #ifndef BASE_PROCESS_PROCESS_METRICS_H_ #define BASE_PROCESS_PROCESS_METRICS_H_ #include #include #include #include "base/base_export.h" #include "base/gtest_prod_util.h" #include "base/memory/raw_ptr.h" #include "base/process/process_handle.h" #include "base/strings/string_piece.h" #include "base/time/time.h" #include "build/build_config.h" #if BUILDFLAG(IS_APPLE) #include #include "base/process/port_provider_mac.h" #if !BUILDFLAG(IS_IOS) #include #endif #endif #if BUILDFLAG(IS_WIN) #include "base/win/scoped_handle.h" #include "base/win/windows_types.h" #endif #if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) || \ BUILDFLAG(IS_AIX) #include #include #include #include "base/cpu.h" #include "base/threading/platform_thread.h" #endif namespace base { class Value; // Full declaration is in process_metrics_iocounters.h. struct IoCounters; #if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) // Minor and major page fault counts since the process creation. // Both counts are process-wide, and exclude child processes. // // minor: Number of page faults that didn't require disk IO. // major: Number of page faults that required disk IO. struct PageFaultCounts { int64_t minor; int64_t major; }; #endif // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || // BUILDFLAG(IS_ANDROID) // Convert a POSIX timeval to microseconds. BASE_EXPORT int64_t TimeValToMicroseconds(const struct timeval& tv); // Provides performance metrics for a specified process (CPU usage and IO // counters). Use CreateCurrentProcessMetrics() to get an instance for the // current process, or CreateProcessMetrics() to get an instance for an // arbitrary process. Then, access the information with the different get // methods. // // This class exposes a few platform-specific APIs for parsing memory usage, but // these are not intended to generalize to other platforms, since the memory // models differ substantially. // // To obtain consistent memory metrics, use the memory_instrumentation service. // // For further documentation on memory, see // https://chromium.googlesource.com/chromium/src/+/HEAD/docs/README.md#Memory class BASE_EXPORT ProcessMetrics { public: ProcessMetrics(const ProcessMetrics&) = delete; ProcessMetrics& operator=(const ProcessMetrics&) = delete; ~ProcessMetrics(); // Creates a ProcessMetrics for the specified process. #if !BUILDFLAG(IS_MAC) static std::unique_ptr CreateProcessMetrics( ProcessHandle process); #else // The port provider needs to outlive the ProcessMetrics object returned by // this function. If NULL is passed as provider, the returned object // only returns valid metrics if |process| is the current process. static std::unique_ptr CreateProcessMetrics( ProcessHandle process, PortProvider* port_provider); #endif // !BUILDFLAG(IS_MAC) // Creates a ProcessMetrics for the current process. This a cross-platform // convenience wrapper for CreateProcessMetrics(). static std::unique_ptr CreateCurrentProcessMetrics(); #if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) // Resident Set Size is a Linux/Android specific memory concept. Do not // attempt to extend this to other platforms. BASE_EXPORT size_t GetResidentSetSize() const; #endif // Returns the percentage of time spent executing, across all threads of the // process, in the interval since the last time the method was called. Since // this considers the total execution time across all threads in a process, // the result can easily exceed 100% in multi-thread processes running on // multi-core systems. In general the result is therefore a value in the // range 0% to SysInfo::NumberOfProcessors() * 100%. // // To obtain the percentage of total available CPU resources consumed by this // process over the interval, the caller must divide by NumberOfProcessors(). // // Since this API measures usage over an interval, it will return zero on the // first call, and an actual value only on the second and subsequent calls. [[nodiscard]] double GetPlatformIndependentCPUUsage(); // Returns the cumulative CPU usage across all threads of the process since // process start. In case of multi-core processors, a process can consume CPU // at a rate higher than wall-clock time, e.g. two cores at full utilization // will result in a time delta of 2 seconds/per 1 wall-clock second. [[nodiscard]] TimeDelta GetCumulativeCPUUsage(); #if BUILDFLAG(IS_WIN) // TODO(pmonette): Remove the precise version of the CPU usage functions once // we're validated that they are indeed better than the regular version above // and that they can replace the old implementation. // Returns the percentage of time spent executing, across all threads of the // process, in the interval since the last time the method was called. // // Same as GetPlatformIndependentCPUUSage() but implemented using // `QueryProcessCycleTime` for higher precision. [[nodiscard]] double GetPreciseCPUUsage(); // Returns the cumulative CPU usage across all threads of the process since // process start. In case of multi-core processors, a process can consume CPU // at a rate higher than wall-clock time, e.g. two cores at full utilization // will result in a time delta of 2 seconds/per 1 wall-clock second. // // This is implemented using `QueryProcessCycleTime` for higher precision. [[nodiscard]] TimeDelta GetPreciseCumulativeCPUUsage(); #endif // BUILDFLAG(IS_WIN) #if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) || \ BUILDFLAG(IS_AIX) // Emits the cumulative CPU usage for all currently active threads since they // were started into the output parameter (replacing its current contents). // Threads that have already terminated will not be reported. Thus, the sum of // these times may not equal the value returned by GetCumulativeCPUUsage(). // Returns false on failure. We return the usage via an output parameter to // allow reuse of CPUUsagePerThread's std::vector by the caller, e.g. to avoid // allocations between repeated calls to this method. // NOTE: Currently only supported on Linux/Android. using CPUUsagePerThread = std::vector>; bool GetCumulativeCPUUsagePerThread(CPUUsagePerThread&); // Similar to GetCumulativeCPUUsagePerThread, but also splits the cumulative // CPU usage by CPU cluster frequency states. One entry in the output // parameter is added for each thread + cluster core index + frequency state // combination with a non-zero CPU time value. // NOTE: Currently only supported on Linux/Android, and only on devices that // expose per-pid/tid time_in_state files in /proc. struct ThreadTimeInState { PlatformThreadId thread_id; CPU::CoreType core_type; // type of the cores in this cluster. uint32_t cluster_core_index; // index of the first core in the cluster. uint64_t core_frequency_khz; TimeDelta cumulative_cpu_time; }; using TimeInStatePerThread = std::vector; bool GetPerThreadCumulativeCPUTimeInState(TimeInStatePerThread&); // Parse the data found in /proc//task//time_in_state into // TimeInStatePerThread (adding to existing entries). Returns false on error. // Exposed for testing. bool ParseProcTimeInState(const std::string& content, PlatformThreadId tid, TimeInStatePerThread& time_in_state_per_thread); #endif // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || // BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_AIX) // Returns the number of average idle cpu wakeups per second since the last // call. int GetIdleWakeupsPerSecond(); #if BUILDFLAG(IS_APPLE) // Returns the number of average "package idle exits" per second, which have // a higher energy impact than a regular wakeup, since the last call. // // From the powermetrics man page: // "With the exception of some Mac Pro systems, Mac and // iOS systems are typically single package systems, wherein all CPUs are // part of a single processor complex (typically a single IC die) with shared // logic that can include (depending on system specifics) shared last level // caches, an integrated memory controller etc. When all CPUs in the package // are idle, the hardware can power-gate significant portions of the shared // logic in addition to each individual processor's logic, as well as take // measures such as placing DRAM in to self-refresh (also referred to as // auto-refresh), place interconnects into lower-power states etc" int GetPackageIdleWakeupsPerSecond(); // Returns "Energy Impact", a synthetic power estimation metric displayed by // macOS in Activity Monitor and the battery menu. int GetEnergyImpact(); #endif // Retrieves accounting information for all I/O operations performed by the // process. // If IO information is retrieved successfully, the function returns true // and fills in the IO_COUNTERS passed in. The function returns false // otherwise. bool GetIOCounters(IoCounters* io_counters) const; // Returns the cumulative disk usage in bytes across all threads of the // process since process start. uint64_t GetCumulativeDiskUsageInBytes(); #if BUILDFLAG(IS_POSIX) // Returns the number of file descriptors currently open by the process, or // -1 on error. int GetOpenFdCount() const; // Returns the soft limit of file descriptors that can be opened by the // process, or -1 on error. int GetOpenFdSoftLimit() const; #endif // BUILDFLAG(IS_POSIX) #if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) // Bytes of swap as reported by /proc/[pid]/status. uint64_t GetVmSwapBytes() const; // Minor and major page fault count as reported by /proc/[pid]/stat. // Returns true for success. bool GetPageFaultCounts(PageFaultCounts* counts) const; #endif // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || // BUILDFLAG(IS_ANDROID) // Returns total memory usage of malloc. size_t GetMallocUsage(); private: #if !BUILDFLAG(IS_MAC) explicit ProcessMetrics(ProcessHandle process); #else ProcessMetrics(ProcessHandle process, PortProvider* port_provider); #endif // !BUILDFLAG(IS_MAC) #if BUILDFLAG(IS_APPLE) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || \ BUILDFLAG(IS_AIX) int CalculateIdleWakeupsPerSecond(uint64_t absolute_idle_wakeups); #endif #if BUILDFLAG(IS_APPLE) // The subset of wakeups that cause a "package exit" can be tracked on macOS. // See |GetPackageIdleWakeupsForSecond| comment for more info. int CalculatePackageIdleWakeupsPerSecond( uint64_t absolute_package_idle_wakeups); #endif #if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) || \ BUILDFLAG(IS_AIX) CPU::CoreType GetCoreType(uint32_t core_index); #endif // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || // BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_AIX) #if BUILDFLAG(IS_WIN) win::ScopedHandle process_; #else ProcessHandle process_; #endif // Used to store the previous times and CPU usage counts so we can // compute the CPU usage between calls. TimeTicks last_cpu_time_; #if !BUILDFLAG(IS_FREEBSD) || !BUILDFLAG(IS_POSIX) TimeDelta last_cumulative_cpu_; #endif #if BUILDFLAG(IS_WIN) TimeTicks last_cpu_time_for_precise_cpu_usage_; TimeDelta last_precise_cumulative_cpu_; #endif #if BUILDFLAG(IS_APPLE) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || \ BUILDFLAG(IS_AIX) // Same thing for idle wakeups. TimeTicks last_idle_wakeups_time_; uint64_t last_absolute_idle_wakeups_; #endif #if BUILDFLAG(IS_APPLE) // And same thing for package idle exit wakeups. TimeTicks last_package_idle_wakeups_time_; uint64_t last_absolute_package_idle_wakeups_; double last_energy_impact_; // In mach_absolute_time units. uint64_t last_energy_impact_time_; #endif #if BUILDFLAG(IS_MAC) // Queries the port provider if it's set. mach_port_t TaskForPid(ProcessHandle process) const; raw_ptr port_provider_; #endif // BUILDFLAG(IS_MAC) }; // Returns the memory committed by the system in KBytes. // Returns 0 if it can't compute the commit charge. BASE_EXPORT size_t GetSystemCommitCharge(); // Returns the maximum number of file descriptors that can be open by a process // at once. If the number is unavailable, a conservative best guess is returned. BASE_EXPORT size_t GetMaxFds(); // Returns the maximum number of handles that can be open at once per process. BASE_EXPORT size_t GetHandleLimit(); #if BUILDFLAG(IS_POSIX) // Increases the file descriptor soft limit to |max_descriptors| or the OS hard // limit, whichever is lower. If the limit is already higher than // |max_descriptors|, then nothing happens. BASE_EXPORT void IncreaseFdLimitTo(unsigned int max_descriptors); #endif // BUILDFLAG(IS_POSIX) #if BUILDFLAG(IS_WIN) || BUILDFLAG(IS_APPLE) || BUILDFLAG(IS_LINUX) || \ BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_AIX) || \ BUILDFLAG(IS_FUCHSIA) // Data about system-wide memory consumption. Values are in KB. Available on // Windows, Mac, Linux, Android and Chrome OS. // // Total memory are available on all platforms that implement // GetSystemMemoryInfo(). Total/free swap memory are available on all platforms // except on Mac. Buffers/cached/active_anon/inactive_anon/active_file/ // inactive_file/dirty/reclaimable/pswpin/pswpout/pgmajfault are available on // Linux/Android/Chrome OS. Shmem/slab are Chrome OS only. // Speculative/file_backed/purgeable are Mac and iOS only. // Free is absent on Windows (see "avail_phys" below). struct BASE_EXPORT SystemMemoryInfoKB { SystemMemoryInfoKB(); SystemMemoryInfoKB(const SystemMemoryInfoKB& other); SystemMemoryInfoKB& operator=(const SystemMemoryInfoKB& other); // Serializes the platform specific fields to value. Value ToValue() const; int total = 0; #if !BUILDFLAG(IS_WIN) int free = 0; #endif #if BUILDFLAG(IS_WIN) // "This is the amount of physical memory that can be immediately reused // without having to write its contents to disk first. It is the sum of the // size of the standby, free, and zero lists." (MSDN). // Standby: not modified pages of physical ram (file-backed memory) that are // not actively being used. int avail_phys = 0; #endif #if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) || \ BUILDFLAG(IS_AIX) // This provides an estimate of available memory as described here: // https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=34e431b0ae398fc54ea69ff85ec700722c9da773 // NOTE: this is ONLY valid in kernels 3.14 and up. Its value will always // be 0 in earlier kernel versions. // Note: it includes _all_ file-backed memory (active + inactive). int available = 0; #endif #if !BUILDFLAG(IS_APPLE) int swap_total = 0; int swap_free = 0; #endif #if BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || \ BUILDFLAG(IS_AIX) || BUILDFLAG(IS_FUCHSIA) int buffers = 0; int cached = 0; int active_anon = 0; int inactive_anon = 0; int active_file = 0; int inactive_file = 0; int dirty = 0; int reclaimable = 0; #endif // BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_LINUX) || // BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_AIX) BUILDFLAG(IS_FUCHSIA) #if BUILDFLAG(IS_CHROMEOS) int shmem = 0; int slab = 0; #endif // BUILDFLAG(IS_CHROMEOS) #if BUILDFLAG(IS_APPLE) int speculative = 0; int file_backed = 0; int purgeable = 0; #endif // BUILDFLAG(IS_APPLE) }; // On Linux/Android/Chrome OS, system-wide memory consumption data is parsed // from /proc/meminfo and /proc/vmstat. On Windows/Mac, it is obtained using // system API calls. // // Fills in the provided |meminfo| structure. Returns true on success. // Exposed for memory debugging widget. BASE_EXPORT bool GetSystemMemoryInfo(SystemMemoryInfoKB* meminfo); #endif // BUILDFLAG(IS_WIN) || BUILDFLAG(IS_APPLE) || BUILDFLAG(IS_LINUX) || // BUILDFLAG(IS_CHROMEOS) BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_AIX) || // BUILDFLAG(IS_FUCHSIA) #if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) || \ BUILDFLAG(IS_AIX) // Parse the data found in /proc//stat and return the sum of the // CPU-related ticks. Returns -1 on parse error. // Exposed for testing. BASE_EXPORT int ParseProcStatCPU(StringPiece input); // Get the number of threads of |process| as available in /proc//stat. // This should be used with care as no synchronization with running threads is // done. This is mostly useful to guarantee being single-threaded. // Returns 0 on failure. BASE_EXPORT int64_t GetNumberOfThreads(ProcessHandle process); // /proc/self/exe refers to the current executable. BASE_EXPORT extern const char kProcSelfExe[]; // Parses a string containing the contents of /proc/meminfo // returns true on success or false for a parsing error // Exposed for testing. BASE_EXPORT bool ParseProcMeminfo(StringPiece input, SystemMemoryInfoKB* meminfo); // Data from /proc/vmstat. struct BASE_EXPORT VmStatInfo { // Serializes the platform specific fields to value. Value ToValue() const; uint64_t pswpin = 0; uint64_t pswpout = 0; uint64_t pgmajfault = 0; uint64_t oom_kill = 0; }; // Retrieves data from /proc/vmstat about system-wide vm operations. // Fills in the provided |vmstat| structure. Returns true on success. BASE_EXPORT bool GetVmStatInfo(VmStatInfo* vmstat); // Parses a string containing the contents of /proc/vmstat // returns true on success or false for a parsing error // Exposed for testing. BASE_EXPORT bool ParseProcVmstat(StringPiece input, VmStatInfo* vmstat); // Data from /proc/diskstats about system-wide disk I/O. struct BASE_EXPORT SystemDiskInfo { SystemDiskInfo(); SystemDiskInfo(const SystemDiskInfo&); SystemDiskInfo& operator=(const SystemDiskInfo&); // Serializes the platform specific fields to value. Value ToValue() const; uint64_t reads = 0; uint64_t reads_merged = 0; uint64_t sectors_read = 0; uint64_t read_time = 0; uint64_t writes = 0; uint64_t writes_merged = 0; uint64_t sectors_written = 0; uint64_t write_time = 0; uint64_t io = 0; uint64_t io_time = 0; uint64_t weighted_io_time = 0; }; // Checks whether the candidate string is a valid disk name, [hsv]d[a-z]+ // for a generic disk or mmcblk[0-9]+ for the MMC case. // Names of disk partitions (e.g. sda1) are not valid. BASE_EXPORT bool IsValidDiskName(StringPiece candidate); // Retrieves data from /proc/diskstats about system-wide disk I/O. // Fills in the provided |diskinfo| structure. Returns true on success. BASE_EXPORT bool GetSystemDiskInfo(SystemDiskInfo* diskinfo); // Returns the amount of time spent in user space since boot across all CPUs. BASE_EXPORT TimeDelta GetUserCpuTimeSinceBoot(); #endif // BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || // BUILDFLAG(IS_ANDROID) || BUILDFLAG(IS_AIX) #if BUILDFLAG(IS_CHROMEOS) // Data from files in directory /sys/block/zram0 about ZRAM usage. struct BASE_EXPORT SwapInfo { SwapInfo() : num_reads(0), num_writes(0), compr_data_size(0), orig_data_size(0), mem_used_total(0) { } // Serializes the platform specific fields to value. Value ToValue() const; uint64_t num_reads = 0; uint64_t num_writes = 0; uint64_t compr_data_size = 0; uint64_t orig_data_size = 0; uint64_t mem_used_total = 0; }; // Parses a string containing the contents of /sys/block/zram0/mm_stat. // This should be used for the new ZRAM sysfs interfaces. // Returns true on success or false for a parsing error. // Exposed for testing. BASE_EXPORT bool ParseZramMmStat(StringPiece mm_stat_data, SwapInfo* swap_info); // Parses a string containing the contents of /sys/block/zram0/stat // This should be used for the new ZRAM sysfs interfaces. // Returns true on success or false for a parsing error. // Exposed for testing. BASE_EXPORT bool ParseZramStat(StringPiece stat_data, SwapInfo* swap_info); // In ChromeOS, reads files from /sys/block/zram0 that contain ZRAM usage data. // Fills in the provided |swap_data| structure. // Returns true on success or false for a parsing error. BASE_EXPORT bool GetSwapInfo(SwapInfo* swap_info); // Data about GPU memory usage. These fields will be -1 if not supported. struct BASE_EXPORT GraphicsMemoryInfoKB { // Serializes the platform specific fields to value. Value ToValue() const; int gpu_objects = -1; int64_t gpu_memory_size = -1; }; // Report on Chrome OS graphics memory. Returns true on success. // /run/debugfs_gpu is a bind mount into /sys/kernel/debug and synchronously // reading the in-memory files in /sys is fast in most cases. On platform that // reading the graphics memory info is slow, this function returns false. BASE_EXPORT bool GetGraphicsMemoryInfo(GraphicsMemoryInfoKB* gpu_meminfo); #endif // BUILDFLAG(IS_CHROMEOS) struct BASE_EXPORT SystemPerformanceInfo { SystemPerformanceInfo(); SystemPerformanceInfo(const SystemPerformanceInfo& other); // Serializes the platform specific fields to value. Value ToValue() const; // Total idle time of all processes in the system (units of 100 ns). uint64_t idle_time = 0; // Number of bytes read. uint64_t read_transfer_count = 0; // Number of bytes written. uint64_t write_transfer_count = 0; // Number of bytes transferred (e.g. DeviceIoControlFile) uint64_t other_transfer_count = 0; // The amount of read operations. uint64_t read_operation_count = 0; // The amount of write operations. uint64_t write_operation_count = 0; // The amount of other operations. uint64_t other_operation_count = 0; // The number of pages written to the system's pagefiles. uint64_t pagefile_pages_written = 0; // The number of write operations performed on the system's pagefiles. uint64_t pagefile_pages_write_ios = 0; // The number of pages of physical memory available to processes running on // the system. uint64_t available_pages = 0; // The number of pages read from disk to resolve page faults. uint64_t pages_read = 0; // The number of read operations initiated to resolve page faults. uint64_t page_read_ios = 0; }; // Retrieves performance counters from the operating system. // Fills in the provided |info| structure. Returns true on success. BASE_EXPORT bool GetSystemPerformanceInfo(SystemPerformanceInfo* info); // Collects and holds performance metrics for system memory and disk. // Provides functionality to retrieve the data on various platforms and // to serialize the stored data. class BASE_EXPORT SystemMetrics { public: SystemMetrics(); static SystemMetrics Sample(); // Serializes the system metrics to value. Value ToValue() const; private: FRIEND_TEST_ALL_PREFIXES(SystemMetricsTest, SystemMetrics); size_t committed_memory_; #if BUILDFLAG(IS_LINUX) || BUILDFLAG(IS_CHROMEOS) || BUILDFLAG(IS_ANDROID) SystemMemoryInfoKB memory_info_; VmStatInfo vmstat_info_; SystemDiskInfo disk_info_; #endif #if BUILDFLAG(IS_CHROMEOS) SwapInfo swap_info_; GraphicsMemoryInfoKB gpu_memory_info_; #endif #if BUILDFLAG(IS_WIN) SystemPerformanceInfo performance_; #endif }; #if BUILDFLAG(IS_MAC) enum class MachVMRegionResult { // There were no more memory regions between |address| and the end of the // virtual address space. Finished, // All output parameters are invalid. Error, // All output parameters are filled in. Success }; // Returns info on the first memory region at or after |address|, including // resident memory and share mode. On Success, |size| reflects the size of the // memory region. // |size| and |info| are output parameters, only valid on Success. // |address| is an in-out parameter, than represents both the address to start // looking, and the start address of the memory region. BASE_EXPORT MachVMRegionResult GetTopInfo(mach_port_t task, mach_vm_size_t* size, mach_vm_address_t* address, vm_region_top_info_data_t* info); // Returns info on the first memory region at or after |address|, including // protection values. On Success, |size| reflects the size of the // memory region. // Returns info on the first memory region at or after |address|, including // resident memory and share mode. // |size| and |info| are output parameters, only valid on Success. BASE_EXPORT MachVMRegionResult GetBasicInfo(mach_port_t task, mach_vm_size_t* size, mach_vm_address_t* address, vm_region_basic_info_64* info); #endif // BUILDFLAG(IS_MAC) } // namespace base #endif // BASE_PROCESS_PROCESS_METRICS_H_