1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // This file contains internal routines that are called by other files in 6 // base/process/. 7 8 #ifndef BASE_PROCESS_INTERNAL_AIX_H_ 9 #define BASE_PROCESS_INTERNAL_AIX_H_ 10 11 #include <stddef.h> 12 #include <stdint.h> 13 #include <unistd.h> 14 15 #include "base/files/file_path.h" 16 17 namespace base { 18 19 namespace internalAIX { 20 21 // "/proc" 22 extern const char kProcDir[]; 23 24 // "psinfo" 25 extern const char kStatFile[]; 26 27 // Returns a FilePath to "/proc/pid". 28 base::FilePath GetProcPidDir(pid_t pid); 29 30 // Take a /proc directory entry named |d_name|, and if it is the directory for 31 // a process, convert it to a pid_t. 32 // Returns 0 on failure. 33 // e.g. /proc/self/ will return 0, whereas /proc/1234 will return 1234. 34 pid_t ProcDirSlotToPid(const char* d_name); 35 36 // Reads /proc/<pid>/stat into |buffer|. Returns true if the file can be read 37 // and is non-empty. 38 bool ReadProcStats(pid_t pid, std::string* buffer); 39 40 // Takes |stats_data| and populates |proc_stats| with the values split by 41 // spaces. Taking into account the 2nd field may, in itself, contain spaces. 42 // Returns true if successful. 43 bool ParseProcStats(const std::string& stats_data, 44 std::vector<std::string>* proc_stats); 45 46 // Fields from /proc/<pid>/psinfo. 47 // If the ordering ever changes, carefully review functions that use these 48 // values. 49 // For AIX this is the bare minimum that we need. Most of the commented out 50 // fields can still be extracted but currently none of these are required. 51 enum ProcStatsFields { 52 VM_COMM = 1, // Filename of executable, without parentheses. 53 // VM_STATE = 2, // Letter indicating the state of the process. 54 VM_PPID = 3, // PID of the parent. 55 VM_PGRP = 4, // Process group id. 56 // VM_UTIME = 13, // Time scheduled in user mode in clock ticks. 57 // VM_STIME = 14, // Time scheduled in kernel mode in clock ticks. 58 // VM_NUMTHREADS = 19, // Number of threads. 59 // VM_STARTTIME = 21, // The time the process started in clock ticks. 60 // VM_VSIZE = 22, // Virtual memory size in bytes. 61 // VM_RSS = 23, // Resident Set Size in pages. 62 }; 63 64 // Reads the |field_num|th field from |proc_stats|. Returns 0 on failure. 65 // This version does not handle the first 3 values, since the first value is 66 // simply |pid|, and the next two values are strings. 67 int64_t GetProcStatsFieldAsInt64(const std::vector<std::string>& proc_stats, 68 ProcStatsFields field_num); 69 70 // Same as GetProcStatsFieldAsInt64(), but for size_t values. 71 size_t GetProcStatsFieldAsSizeT(const std::vector<std::string>& proc_stats, 72 ProcStatsFields field_num); 73 74 // Convenience wrapper around GetProcStatsFieldAsInt64(), ParseProcStats() and 75 // ReadProcStats(). See GetProcStatsFieldAsInt64() for details. 76 int64_t ReadProcStatsAndGetFieldAsInt64(pid_t pid, ProcStatsFields field_num); 77 78 // Same as ReadProcStatsAndGetFieldAsInt64() but for size_t values. 79 size_t ReadProcStatsAndGetFieldAsSizeT(pid_t pid, ProcStatsFields field_num); 80 81 } // namespace internal 82 } // namespace base 83 84 #endif // BASE_PROCESS_INTERNAL_AIX_H_ 85