| // Copyright 2014 The Crashpad Authors. All rights reserved. |
| // |
| // 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. |
| |
| #ifndef CRASHPAD_UTIL_POSIX_PROCESS_INFO_H_ |
| #define CRASHPAD_UTIL_POSIX_PROCESS_INFO_H_ |
| |
| #include <sys/time.h> |
| #include <sys/types.h> |
| #include <unistd.h> |
| |
| #include <set> |
| #include <string> |
| #include <vector> |
| |
| #include "base/macros.h" |
| #include "build/build_config.h" |
| #include "util/misc/initialization_state.h" |
| #include "util/misc/initialization_state_dcheck.h" |
| |
| #if defined(OS_APPLE) |
| #include <mach/mach.h> |
| #include <sys/sysctl.h> |
| #endif |
| |
| #if defined(OS_LINUX) || defined(OS_CHROMEOS) || defined(OS_ANDROID) |
| #include "util/linux/ptrace_connection.h" |
| #endif |
| |
| namespace crashpad { |
| |
| class ProcessInfo { |
| public: |
| ProcessInfo(); |
| ~ProcessInfo(); |
| |
| #if defined(OS_LINUX) || defined(OS_CHROMEOS) || defined(OS_ANDROID) || DOXYGEN |
| //! \brief Initializes this object with information about the process whose ID |
| //! is \a pid using a PtraceConnection \a connection. |
| //! |
| //! This method must be called successfully prior to calling any other method |
| //! in this class. This method may only be called once. |
| //! |
| //! It is unspecified whether the information that an object of this class |
| //! returns is loaded at the time Initialize() is called or subsequently, and |
| //! whether this information is cached in the object or not. |
| //! |
| //! \param[in] connection A connection to the remote process. |
| //! |
| //! \return `true` on success, `false` on failure with a message logged. |
| bool InitializeWithPtrace(PtraceConnection* connection); |
| #endif // OS_LINUX || OS_CHROMEOS || OS_ANDROID || DOXYGEN |
| |
| #if defined(OS_APPLE) || DOXYGEN |
| //! \brief Initializes this object with information about the process whose ID |
| //! is \a pid. |
| //! |
| //! This method must be called successfully prior to calling any other method |
| //! in this class. This method may only be called once. |
| //! |
| //! It is unspecified whether the information that an object of this class |
| //! returns is loaded at the time Initialize() is called or subsequently, and |
| //! whether this information is cached in the object or not. |
| //! |
| //! \param[in] pid The process ID to obtain information for. |
| //! |
| //! \return `true` on success, `false` on failure with a message logged. |
| bool InitializeWithPid(pid_t pid); |
| |
| //! \brief Initializes this object with information about a process based on |
| //! its Mach task. |
| //! |
| //! This method serves as a stand-in for InitializeWithPid() and may be called |
| //! in its place with the same restrictions and considerations. |
| //! |
| //! \param[in] task The Mach task to obtain information for. |
| //! |
| //! \return `true` on success, `false` on failure with an message logged. |
| bool InitializeWithTask(task_t task); |
| #endif |
| |
| //! \return The target task’s process ID. |
| pid_t ProcessID() const; |
| |
| //! \return The target task’s parent process ID. |
| pid_t ParentProcessID() const; |
| |
| //! \return The target process’ real user ID as would be returned to it by |
| //! `getuid()`. |
| uid_t RealUserID() const; |
| |
| //! \return The target process’ effective user ID as would be returned to it |
| //! by `geteuid()`. |
| uid_t EffectiveUserID() const; |
| |
| //! \return The target process’ saved set-user ID. |
| uid_t SavedUserID() const; |
| |
| //! \return the target process’ real group ID as would be returned to it by |
| //! `getgid()`. |
| gid_t RealGroupID() const; |
| |
| //! \return the target process’ effective group ID as would be returned to it |
| //! by `getegid()`. |
| gid_t EffectiveGroupID() const; |
| |
| //! \return The target process’ saved set-group ID. |
| gid_t SavedGroupID() const; |
| |
| //! \return the target process’ supplementary group list as would be returned |
| //! to it by `getgroups()`. |
| std::set<gid_t> SupplementaryGroups() const; |
| |
| //! \return All groups that the target process claims membership in, including |
| //! RealGroupID(), EffectiveGroupID(), SavedGroupID(), and |
| //! SupplementaryGroups(). |
| std::set<gid_t> AllGroups() const; |
| |
| //! \brief Determines whether the target process has changed privileges. |
| //! |
| //! A process is considered to have changed privileges if it has changed its |
| //! real, effective, or saved set-user or group IDs with the `setuid()`, |
| //! `seteuid()`, `setreuid()`, `setgid()`, `setegid()`, or `setregid()` system |
| //! calls since its most recent `execve()`, or if its privileges changed at |
| //! `execve()` as a result of executing a setuid or setgid executable. |
| bool DidChangePrivileges() const; |
| |
| //! \brief Determines the target process’ bitness. |
| //! |
| //! \return `true` if the target task is a 64-bit process. |
| bool Is64Bit() const; |
| |
| //! \brief Determines the target process’ start time. |
| //! |
| //! \param[out] start_time The time that the process started. |
| //! |
| //! \return `true` on success, with \a start_time set. Otherwise, `false` with |
| //! a message logged. |
| bool StartTime(timeval* start_time) const; |
| |
| //! \brief Obtains the arguments used to launch a process. |
| //! |
| //! Whether it is possible to obtain this information for a process with |
| //! different privileges than the running program is system-dependent. |
| //! |
| //! \param[out] argv The process’ arguments as passed to its `main()` function |
| //! as the \a argv parameter, possibly modified by the process. |
| //! |
| //! \return `true` on success, with \a argv populated appropriately. |
| //! Otherwise, `false` with a message logged. |
| //! |
| //! \note This function may spuriously return `false` when used to examine a |
| //! process that it is calling `exec()`. If examining such a process, call |
| //! this function in a retry loop with a small (100ns) delay to avoid an |
| //! erroneous assumption that \a pid is not running. |
| bool Arguments(std::vector<std::string>* argv) const; |
| |
| private: |
| #if defined(OS_APPLE) |
| kinfo_proc kern_proc_info_; |
| #elif defined(OS_LINUX) || defined(OS_CHROMEOS) || defined(OS_ANDROID) |
| // Some members are marked mutable so that they can be lazily initialized by |
| // const methods. These are always InitializationState-protected so that |
| // multiple successive calls will always produce the same return value and out |
| // parameters. This is necessary for intergration with the Snapshot interface. |
| // See https://crashpad.chromium.org/bug/9. |
| PtraceConnection* connection_; |
| std::set<gid_t> supplementary_groups_; |
| mutable timeval start_time_; |
| pid_t pid_; |
| pid_t ppid_; |
| uid_t uid_; |
| uid_t euid_; |
| uid_t suid_; |
| gid_t gid_; |
| gid_t egid_; |
| gid_t sgid_; |
| bool is_64_bit_; |
| mutable InitializationState start_time_initialized_; |
| #endif |
| InitializationStateDcheck initialized_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ProcessInfo); |
| }; |
| |
| } // namespace crashpad |
| |
| #endif // CRASHPAD_UTIL_POSIX_PROCESS_INFO_H_ |