jdk-sandbox: comparison src/hotspot/os/linux/os_perf

equal deleted inserted replaced

-:7a2a740815b7
+:caf115bb98ad
+/*
+* Copyright (c) 2012, 2018, Oracle and/or its affiliates. All rights reserved.
+* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+*
+* This code is free software; you can redistribute it and/or modify it
+* under the terms of the GNU General Public License version 2 only, as
+* published by the Free Software Foundation.
+*
+* This code is distributed in the hope that it will be useful, but WITHOUT
+* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+* version 2 for more details (a copy is included in the LICENSE file that
+* accompanied this code).
+*
+* You should have received a copy of the GNU General Public License version
+* 2 along with this work; if not, write to the Free Software Foundation,
+* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+*
+* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+* or visit www.oracle.com if you need additional information or have any
+* questions.
+*
+*/
+#include "precompiled.hpp"
+#include "jvm.h"
+#include "memory/allocation.inline.hpp"
+#include "os_linux.inline.hpp"
+#include "runtime/os.hpp"
+#include "runtime/os_perf.hpp"
+#ifdef X86
+#include "vm_version_ext_x86.hpp"
+#endif
+#ifdef ARM
+#include "vm_version_ext_arm.hpp"
+#endif
+#ifndef ARM
+#ifdef AARCH64
+#include "vm_version_ext_aarch64.hpp"
+#endif
+#endif
+#include <stdio.h>
+#include <stdarg.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/resource.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+#include <stdlib.h>
+#include <dlfcn.h>
+#include <pthread.h>
+#include <limits.h>
+/**
+/proc/[number]/stat
+Status information about the process.  This is used by ps(1).  It is defined in /usr/src/linux/fs/proc/array.c.
+The fields, in order, with their proper scanf(3) format specifiers, are:
+1. pid %d The process id.
+2. comm %s
+The filename of the executable, in parentheses.  This is visible whether or not the executable is swapped out.
+3. state %c
+One  character  from  the  string "RSDZTW" where R is running, S is sleeping in an interruptible wait, D is waiting in uninterruptible disk
+sleep, Z is zombie, T is traced or stopped (on a signal), and W is paging.
+4. ppid %d
+The PID of the parent.
+5. pgrp %d
+The process group ID of the process.
+6. session %d
+The session ID of the process.
+7. tty_nr %d
+The tty the process uses.
+8. tpgid %d
+The process group ID of the process which currently owns the tty that the process is connected to.
+9. flags %lu
+The flags of the process.  The math bit is decimal 4, and the traced bit is decimal 10.
+10. minflt %lu
+The number of minor faults the process has made which have not required loading a memory page from disk.
+11. cminflt %lu
+The number of minor faults that the process's waited-for children have made.
+12. majflt %lu
+The number of major faults the process has made which have required loading a memory page from disk.
+13. cmajflt %lu
+The number of major faults that the process's waited-for children have made.
+14. utime %lu
+The number of jiffies that this process has been scheduled in user mode.
+15. stime %lu
+The number of jiffies that this process has been scheduled in kernel mode.
+16. cutime %ld
+The number of jiffies that this process's waited-for children have been scheduled in user mode. (See also times(2).)
+17. cstime %ld
+The number of jiffies that this process' waited-for children have been scheduled in kernel mode.
+18. priority %ld
+The standard nice value, plus fifteen.  The value is never negative in the kernel.
+19. nice %ld
+The nice value ranges from 19 (nicest) to -19 (not nice to others).
+20. 0 %ld  This value is hard coded to 0 as a placeholder for a removed field.
+21. itrealvalue %ld
+The time in jiffies before the next SIGALRM is sent to the process due to an interval timer.
+22. starttime %lu
+The time in jiffies the process started after system boot.
+23. vsize %lu
+Virtual memory size in bytes.
+24. rss %ld
+Resident Set Size: number of pages the process has in real memory, minus 3 for administrative purposes. This is just the pages which  count
+towards text, data, or stack space.  This does not include pages which have not been demand-loaded in, or which are swapped out.
+25. rlim %lu
+Current limit in bytes on the rss of the process (usually 4294967295 on i386).
+26. startcode %lu
+The address above which program text can run.
+27. endcode %lu
+The address below which program text can run.
+28. startstack %lu
+The address of the start of the stack.
+29. kstkesp %lu
+The current value of esp (stack pointer), as found in the kernel stack page for the process.
+30. kstkeip %lu
+The current EIP (instruction pointer).
+31. signal %lu
+The bitmap of pending signals (usually 0).
+32. blocked %lu
+The bitmap of blocked signals (usually 0, 2 for shells).
+33. sigignore %lu
+The bitmap of ignored signals.
+34. sigcatch %lu
+The bitmap of catched signals.
+35. wchan %lu
+This  is the "channel" in which the process is waiting.  It is the address of a system call, and can be looked up in a namelist if you need
+a textual name.  (If you have an up-to-date /etc/psdatabase, then try ps -l to see the WCHAN field in action.)
+36. nswap %lu
+Number of pages swapped - not maintained.
+37. cnswap %lu
+Cumulative nswap for child processes.
+38. exit_signal %d
+Signal to be sent to parent when we die.
+39. processor %d
+CPU number last executed on.
+///// SSCANF FORMAT STRING. Copy and use.
+field:        1  2  3  4  5  6  7  8  9   10  11  12  13  14  15  16  17  18  19  20  21  22  23  24  25  26  27  28  29  30  31  32  33  34  35  36  37  38 39
+format:       %d %s %c %d %d %d %d %d %lu %lu %lu %lu %lu %lu %lu %ld %ld %ld %ld %ld %ld %lu %lu %ld %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %lu %d %d
+*/
+/**
+* For platforms that have them, when declaring
+* a printf-style function,
+*   formatSpec is the parameter number (starting at 1)
+*       that is the format argument ("%d pid %s")
+*   params is the parameter number where the actual args to
+*       the format starts. If the args are in a va_list, this
+*       should be 0.
+*/
+#ifndef PRINTF_ARGS
+#  define PRINTF_ARGS(formatSpec,  params) ATTRIBUTE_PRINTF(formatSpec, params)
+#endif
+#ifndef SCANF_ARGS
+#  define SCANF_ARGS(formatSpec,   params) ATTRIBUTE_SCANF(formatSpec, params)
+#endif
+#ifndef _PRINTFMT_
+#  define _PRINTFMT_
+#endif
+#ifndef _SCANFMT_
+#  define _SCANFMT_
+#endif
+struct CPUPerfTicks {
+uint64_t  used;
+uint64_t  usedKernel;
+uint64_t  total;
+};
+typedef enum {
+CPU_LOAD_VM_ONLY,
+CPU_LOAD_GLOBAL,
+} CpuLoadTarget;
+enum {
+UNDETECTED,
+UNDETECTABLE,
+LINUX26_NPTL,
+BAREMETAL
+};
+struct CPUPerfCounters {
+int   nProcs;
+CPUPerfTicks jvmTicks;
+CPUPerfTicks* cpus;
+};
+static double get_cpu_load(int which_logical_cpu, CPUPerfCounters* counters, double* pkernelLoad, CpuLoadTarget target);
+/** reads /proc/<pid>/stat data, with some checks and some skips.
+*  Ensure that 'fmt' does _NOT_ contain the first two "%d %s"
+*/
+static int SCANF_ARGS(2, 0) vread_statdata(const char* procfile, _SCANFMT_ const char* fmt, va_list args) {
+FILE*f;
+int n;
+char buf[2048];
+if ((f = fopen(procfile, "r")) == NULL) {
+return -1;
+}
+if ((n = fread(buf, 1, sizeof(buf), f)) != -1) {
+char *tmp;
+buf[n-1] = '\0';
+/** skip through pid and exec name. */
+if ((tmp = strrchr(buf, ')')) != NULL) {
+// skip the ')' and the following space
+// but check that buffer is long enough
+tmp += 2;
+if (tmp < buf + n) {
+n = vsscanf(tmp, fmt, args);
+}
+}
+}
+fclose(f);
+return n;
+}
+static int SCANF_ARGS(2, 3) read_statdata(const char* procfile, _SCANFMT_ const char* fmt, ...) {
+int   n;
+va_list args;
+va_start(args, fmt);
+n = vread_statdata(procfile, fmt, args);
+va_end(args);
+return n;
+}
+static FILE* open_statfile(void) {
+FILE *f;
+if ((f = fopen("/proc/stat", "r")) == NULL) {
+static int haveWarned = 0;
+if (!haveWarned) {
+haveWarned = 1;
+}
+}
+return f;
+}
+static void
+next_line(FILE *f) {
+int c;
+do {
+c = fgetc(f);
+} while (c != '\n' && c != EOF);
+}
+/**
+* Return the total number of ticks since the system was booted.
+* If the usedTicks parameter is not NULL, it will be filled with
+* the number of ticks spent on actual processes (user, system or
+* nice processes) since system boot. Note that this is the total number
+* of "executed" ticks on _all_ CPU:s, that is on a n-way system it is
+* n times the number of ticks that has passed in clock time.
+*
+* Returns a negative value if the reading of the ticks failed.
+*/
+static OSReturn get_total_ticks(int which_logical_cpu, CPUPerfTicks* pticks) {
+FILE*         fh;
+uint64_t      userTicks, niceTicks, systemTicks, idleTicks;
+uint64_t      iowTicks = 0, irqTicks = 0, sirqTicks= 0;
+int           logical_cpu = -1;
+const int     expected_assign_count = (-1 == which_logical_cpu) ? 4 : 5;
+int           n;
+if ((fh = open_statfile()) == NULL) {
+return OS_ERR;
+}
+if (-1 == which_logical_cpu) {
+n = fscanf(fh, "cpu " UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " "
+UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT,
+&userTicks, &niceTicks, &systemTicks, &idleTicks,
+&iowTicks, &irqTicks, &sirqTicks);
+} else {
+// Move to next line
+next_line(fh);
+// find the line for requested cpu faster to just iterate linefeeds?
+for (int i = 0; i < which_logical_cpu; i++) {
+next_line(fh);
+}
+n = fscanf(fh, "cpu%u " UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " "
+UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT,
+&logical_cpu, &userTicks, &niceTicks,
+&systemTicks, &idleTicks, &iowTicks, &irqTicks, &sirqTicks);
+}
+fclose(fh);
+if (n < expected_assign_count || logical_cpu != which_logical_cpu) {
+#ifdef DEBUG_LINUX_PROC_STAT
+vm_fprintf(stderr, "[stat] read failed");
+#endif
+return OS_ERR;
+}
+#ifdef DEBUG_LINUX_PROC_STAT
+vm_fprintf(stderr, "[stat] read "
+UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " "
+UINT64_FORMAT " " UINT64_FORMAT " " UINT64_FORMAT " \n",
+userTicks, niceTicks, systemTicks, idleTicks,
+iowTicks, irqTicks, sirqTicks);
+#endif
+pticks->used       = userTicks + niceTicks;
+pticks->usedKernel = systemTicks + irqTicks + sirqTicks;
+pticks->total      = userTicks + niceTicks + systemTicks + idleTicks +
+iowTicks + irqTicks + sirqTicks;
+return OS_OK;
+}
+static int get_systemtype(void) {
+static int procEntriesType = UNDETECTED;
+DIR *taskDir;
+if (procEntriesType != UNDETECTED) {
+return procEntriesType;
+}
+// Check whether we have a task subdirectory
+if ((taskDir = opendir("/proc/self/task")) == NULL) {
+procEntriesType = UNDETECTABLE;
+} else {
+// The task subdirectory exists; we're on a Linux >= 2.6 system
+closedir(taskDir);
+procEntriesType = LINUX26_NPTL;
+}
+return procEntriesType;
+}
+/** read user and system ticks from a named procfile, assumed to be in 'stat' format then. */
+static int read_ticks(const char* procfile, uint64_t* userTicks, uint64_t* systemTicks) {
+return read_statdata(procfile, "%*c %*d %*d %*d %*d %*d %*u %*u %*u %*u %*u " UINT64_FORMAT " " UINT64_FORMAT,
+userTicks, systemTicks);
+}
+/**
+* Return the number of ticks spent in any of the processes belonging
+* to the JVM on any CPU.
+*/
+static OSReturn get_jvm_ticks(CPUPerfTicks* pticks) {
+uint64_t userTicks;
+uint64_t systemTicks;
+if (get_systemtype() != LINUX26_NPTL) {
+return OS_ERR;
+}
+if (read_ticks("/proc/self/stat", &userTicks, &systemTicks) != 2) {
+return OS_ERR;
+}
+// get the total
+if (get_total_ticks(-1, pticks) != OS_OK) {
+return OS_ERR;
+}
+pticks->used       = userTicks;
+pticks->usedKernel = systemTicks;
+return OS_OK;
+}
+/**
+* Return the load of the CPU as a double. 1.0 means the CPU process uses all
+* available time for user or system processes, 0.0 means the CPU uses all time
+* being idle.
+*
+* Returns a negative value if there is a problem in determining the CPU load.
+*/
+static double get_cpu_load(int which_logical_cpu, CPUPerfCounters* counters, double* pkernelLoad, CpuLoadTarget target) {
+uint64_t udiff, kdiff, tdiff;
+CPUPerfTicks* pticks;
+CPUPerfTicks  tmp;
+double user_load;
+*pkernelLoad = 0.0;
+if (target == CPU_LOAD_VM_ONLY) {
+pticks = &counters->jvmTicks;
+} else if (-1 == which_logical_cpu) {
+pticks = &counters->cpus[counters->nProcs];
+} else {
+pticks = &counters->cpus[which_logical_cpu];
+}
+tmp = *pticks;
+if (target == CPU_LOAD_VM_ONLY) {
+if (get_jvm_ticks(pticks) != OS_OK) {
+return -1.0;
+}
+} else if (get_total_ticks(which_logical_cpu, pticks) != OS_OK) {
+return -1.0;
+}
+// seems like we sometimes end up with less kernel ticks when
+// reading /proc/self/stat a second time, timing issue between cpus?
+if (pticks->usedKernel < tmp.usedKernel) {
+kdiff = 0;
+} else {
+kdiff = pticks->usedKernel - tmp.usedKernel;
+}
+tdiff = pticks->total - tmp.total;
+udiff = pticks->used - tmp.used;
+if (tdiff == 0) {
+return 0.0;
+} else if (tdiff < (udiff + kdiff)) {
+tdiff = udiff + kdiff;
+}
+*pkernelLoad = (kdiff / (double)tdiff);
+// BUG9044876, normalize return values to sane values
+*pkernelLoad = MAX2<double>(*pkernelLoad, 0.0);
+*pkernelLoad = MIN2<double>(*pkernelLoad, 1.0);
+user_load = (udiff / (double)tdiff);
+user_load = MAX2<double>(user_load, 0.0);
+user_load = MIN2<double>(user_load, 1.0);
+return user_load;
+}
+static int SCANF_ARGS(1, 2) parse_stat(_SCANFMT_ const char* fmt, ...) {
+FILE *f;
+va_list args;
+va_start(args, fmt);
+if ((f = open_statfile()) == NULL) {
+va_end(args);
+return OS_ERR;
+}
+for (;;) {
+char line[80];
+if (fgets(line, sizeof(line), f) != NULL) {
+if (vsscanf(line, fmt, args) == 1) {
+fclose(f);
+va_end(args);
+return OS_OK;
+}
+} else {
+fclose(f);
+va_end(args);
+return OS_ERR;
+}
+}
+}
+static int get_noof_context_switches(uint64_t* switches) {
+return parse_stat("ctxt " UINT64_FORMAT "\n", switches);
+}
+/** returns boot time in _seconds_ since epoch */
+static int get_boot_time(uint64_t* time) {
+return parse_stat("btime " UINT64_FORMAT "\n", time);
+}
+static int perf_context_switch_rate(double* rate) {
+static pthread_mutex_t contextSwitchLock = PTHREAD_MUTEX_INITIALIZER;
+static uint64_t      lastTime;
+static uint64_t      lastSwitches;
+static double        lastRate;
+uint64_t lt = 0;
+int res = 0;
+if (lastTime == 0) {
+uint64_t tmp;
+if (get_boot_time(&tmp) < 0) {
+return OS_ERR;
+}
+lt = tmp * 1000;
+}
+res = OS_OK;
+pthread_mutex_lock(&contextSwitchLock);
+{
+uint64_t sw;
+s8 t, d;
+if (lastTime == 0) {
+lastTime = lt;
+}
+t = os::javaTimeMillis();
+d = t - lastTime;
+if (d == 0) {
+*rate = lastRate;
+} else if (!get_noof_context_switches(&sw)) {
+*rate      = ( (double)(sw - lastSwitches) / d ) * 1000;
+lastRate     = *rate;
+lastSwitches = sw;
+lastTime     = t;
+} else {
+*rate = 0;
+res   = OS_ERR;
+}
+if (*rate <= 0) {
+*rate = 0;
+lastRate = 0;
+}
+}
+pthread_mutex_unlock(&contextSwitchLock);
+return res;
+}
+class CPUPerformanceInterface::CPUPerformance : public CHeapObj<mtInternal> {
+friend class CPUPerformanceInterface;
+private:
+CPUPerfCounters _counters;
+int cpu_load(int which_logical_cpu, double* cpu_load);
+int context_switch_rate(double* rate);
+int cpu_load_total_process(double* cpu_load);
+int cpu_loads_process(double* pjvmUserLoad, double* pjvmKernelLoad, double* psystemTotalLoad);
+public:
+CPUPerformance();
+bool initialize();
+~CPUPerformance();
+};
+CPUPerformanceInterface::CPUPerformance::CPUPerformance() {
+_counters.nProcs = os::active_processor_count();
+_counters.cpus = NULL;
+}
+bool CPUPerformanceInterface::CPUPerformance::initialize() {
+size_t tick_array_size = (_counters.nProcs +1) * sizeof(CPUPerfTicks);
+_counters.cpus = (CPUPerfTicks*)NEW_C_HEAP_ARRAY(char, tick_array_size, mtInternal);
+if (NULL == _counters.cpus) {
+return false;
+}
+memset(_counters.cpus, 0, tick_array_size);
+// For the CPU load total
+get_total_ticks(-1, &_counters.cpus[_counters.nProcs]);
+// For each CPU
+for (int i = 0; i < _counters.nProcs; i++) {
+get_total_ticks(i, &_counters.cpus[i]);
+}
+// For JVM load
+get_jvm_ticks(&_counters.jvmTicks);
+// initialize context switch system
+// the double is only for init
+double init_ctx_switch_rate;
+perf_context_switch_rate(&init_ctx_switch_rate);
+return true;
+}
+CPUPerformanceInterface::CPUPerformance::~CPUPerformance() {
+if (_counters.cpus != NULL) {
+FREE_C_HEAP_ARRAY(char, _counters.cpus);
+}
+}
+int CPUPerformanceInterface::CPUPerformance::cpu_load(int which_logical_cpu, double* cpu_load) {
+double u, s;
+u = get_cpu_load(which_logical_cpu, &_counters, &s, CPU_LOAD_GLOBAL);
+if (u < 0) {
+*cpu_load = 0.0;
+return OS_ERR;
+}
+// Cap total systemload to 1.0
+*cpu_load = MIN2<double>((u + s), 1.0);
+return OS_OK;
+}
+int CPUPerformanceInterface::CPUPerformance::cpu_load_total_process(double* cpu_load) {
+double u, s;
+u = get_cpu_load(-1, &_counters, &s, CPU_LOAD_VM_ONLY);
+if (u < 0) {
+*cpu_load = 0.0;
+return OS_ERR;
+}
+*cpu_load = u + s;
+return OS_OK;
+}
+int CPUPerformanceInterface::CPUPerformance::cpu_loads_process(double* pjvmUserLoad, double* pjvmKernelLoad, double* psystemTotalLoad) {
+double u, s, t;
+assert(pjvmUserLoad != NULL, "pjvmUserLoad not inited");
+assert(pjvmKernelLoad != NULL, "pjvmKernelLoad not inited");
+assert(psystemTotalLoad != NULL, "psystemTotalLoad not inited");
+u = get_cpu_load(-1, &_counters, &s, CPU_LOAD_VM_ONLY);
+if (u < 0) {
+*pjvmUserLoad = 0.0;
+*pjvmKernelLoad = 0.0;
+*psystemTotalLoad = 0.0;
+return OS_ERR;
+}
+cpu_load(-1, &t);
+// clamp at user+system and 1.0
+if (u + s > t) {
+t = MIN2<double>(u + s, 1.0);
+}
+*pjvmUserLoad = u;
+*pjvmKernelLoad = s;
+*psystemTotalLoad = t;
+return OS_OK;
+}
+int CPUPerformanceInterface::CPUPerformance::context_switch_rate(double* rate) {
+return perf_context_switch_rate(rate);
+}
+CPUPerformanceInterface::CPUPerformanceInterface() {
+_impl = NULL;
+}
+bool CPUPerformanceInterface::initialize() {
+_impl = new CPUPerformanceInterface::CPUPerformance();
+return NULL == _impl ? false : _impl->initialize();
+}
+CPUPerformanceInterface::~CPUPerformanceInterface() {
+if (_impl != NULL) {
+delete _impl;
+}
+}
+int CPUPerformanceInterface::cpu_load(int which_logical_cpu, double* cpu_load) const {
+return _impl->cpu_load(which_logical_cpu, cpu_load);
+}
+int CPUPerformanceInterface::cpu_load_total_process(double* cpu_load) const {
+return _impl->cpu_load_total_process(cpu_load);
+}
+int CPUPerformanceInterface::cpu_loads_process(double* pjvmUserLoad, double* pjvmKernelLoad, double* psystemTotalLoad) const {
+return _impl->cpu_loads_process(pjvmUserLoad, pjvmKernelLoad, psystemTotalLoad);
+}
+int CPUPerformanceInterface::context_switch_rate(double* rate) const {
+return _impl->context_switch_rate(rate);
+}
+class SystemProcessInterface::SystemProcesses : public CHeapObj<mtInternal> {
+friend class SystemProcessInterface;
+private:
+class ProcessIterator : public CHeapObj<mtInternal> {
+friend class SystemProcessInterface::SystemProcesses;
+private:
+DIR*           _dir;
+struct dirent* _entry;
+bool           _valid;
+char           _exeName[PATH_MAX];
+char           _exePath[PATH_MAX];
+ProcessIterator();
+~ProcessIterator();
+bool initialize();
+bool is_valid() const { return _valid; }
+bool is_valid_entry(struct dirent* entry) const;
+bool is_dir(const char* name) const;
+int  fsize(const char* name, uint64_t& size) const;
+char* allocate_string(const char* str) const;
+void  get_exe_name();
+char* get_exe_path();
+char* get_cmdline();
+int current(SystemProcess* process_info);
+int next_process();
+};
+ProcessIterator* _iterator;
+SystemProcesses();
+bool initialize();
+~SystemProcesses();
+//information about system processes
+int system_processes(SystemProcess** system_processes, int* no_of_sys_processes) const;
+};
+bool SystemProcessInterface::SystemProcesses::ProcessIterator::is_dir(const char* name) const {
+struct stat mystat;
+int ret_val = 0;
+ret_val = stat(name, &mystat);
+if (ret_val < 0) {
+return false;
+}
+ret_val = S_ISDIR(mystat.st_mode);
+return ret_val > 0;
+}
+int SystemProcessInterface::SystemProcesses::ProcessIterator::fsize(const char* name, uint64_t& size) const {
+assert(name != NULL, "name pointer is NULL!");
+size = 0;
+struct stat fbuf;
+if (stat(name, &fbuf) < 0) {
+return OS_ERR;
+}
+size = fbuf.st_size;
+return OS_OK;
+}
+// if it has a numeric name, is a directory and has a 'stat' file in it
+bool SystemProcessInterface::SystemProcesses::ProcessIterator::is_valid_entry(struct dirent* entry) const {
+char buffer[PATH_MAX];
+uint64_t size = 0;
+if (atoi(entry->d_name) != 0) {
+jio_snprintf(buffer, PATH_MAX, "/proc/%s", entry->d_name);
+buffer[PATH_MAX - 1] = '\0';
+if (is_dir(buffer)) {
+jio_snprintf(buffer, PATH_MAX, "/proc/%s/stat", entry->d_name);
+buffer[PATH_MAX - 1] = '\0';
+if (fsize(buffer, size) != OS_ERR) {
+return true;
+}
+}
+}
+return false;
+}
+// get exe-name from /proc/<pid>/stat
+void SystemProcessInterface::SystemProcesses::ProcessIterator::get_exe_name() {
+FILE* fp;
+char  buffer[PATH_MAX];
+jio_snprintf(buffer, PATH_MAX, "/proc/%s/stat", _entry->d_name);
+buffer[PATH_MAX - 1] = '\0';
+if ((fp = fopen(buffer, "r")) != NULL) {
+if (fgets(buffer, PATH_MAX, fp) != NULL) {
+char* start, *end;
+// exe-name is between the first pair of ( and )
+start = strchr(buffer, '(');
+if (start != NULL && start[1] != '\0') {
+start++;
+end = strrchr(start, ')');
+if (end != NULL) {
+size_t len;
+len = MIN2<size_t>(end - start, sizeof(_exeName) - 1);
+memcpy(_exeName, start, len);
+_exeName[len] = '\0';
+}
+}
+}
+fclose(fp);
+}
+}
+// get command line from /proc/<pid>/cmdline
+char* SystemProcessInterface::SystemProcesses::ProcessIterator::get_cmdline() {
+FILE* fp;
+char  buffer[PATH_MAX];
+char* cmdline = NULL;
+jio_snprintf(buffer, PATH_MAX, "/proc/%s/cmdline", _entry->d_name);
+buffer[PATH_MAX - 1] = '\0';
+if ((fp = fopen(buffer, "r")) != NULL) {
+size_t size = 0;
+char   dummy;
+// find out how long the file is (stat always returns 0)
+while (fread(&dummy, 1, 1, fp) == 1) {
+size++;
+}
+if (size > 0) {
+cmdline = NEW_C_HEAP_ARRAY(char, size + 1, mtInternal);
+if (cmdline != NULL) {
+cmdline[0] = '\0';
+if (fseek(fp, 0, SEEK_SET) == 0) {
+if (fread(cmdline, 1, size, fp) == size) {
+// the file has the arguments separated by '\0',
+// so we translate '\0' to ' '
+for (size_t i = 0; i < size; i++) {
+if (cmdline[i] == '\0') {
+cmdline[i] = ' ';
+}
+}
+cmdline[size] = '\0';
+}
+}
+}
+}
+fclose(fp);
+}
+return cmdline;
+}
+// get full path to exe from /proc/<pid>/exe symlink
+char* SystemProcessInterface::SystemProcesses::ProcessIterator::get_exe_path() {
+char buffer[PATH_MAX];
+jio_snprintf(buffer, PATH_MAX, "/proc/%s/exe", _entry->d_name);
+buffer[PATH_MAX - 1] = '\0';
+return realpath(buffer, _exePath);
+}
+char* SystemProcessInterface::SystemProcesses::ProcessIterator::allocate_string(const char* str) const {
+if (str != NULL) {
+size_t len = strlen(str);
+char* tmp = NEW_C_HEAP_ARRAY(char, len+1, mtInternal);
+strncpy(tmp, str, len);
+tmp[len] = '\0';
+return tmp;
+}
+return NULL;
+}
+int SystemProcessInterface::SystemProcesses::ProcessIterator::current(SystemProcess* process_info) {
+if (!is_valid()) {
+return OS_ERR;
+}
+process_info->set_pid(atoi(_entry->d_name));
+get_exe_name();
+process_info->set_name(allocate_string(_exeName));
+if (get_exe_path() != NULL) {
+process_info->set_path(allocate_string(_exePath));
+}
+char* cmdline = NULL;
+cmdline = get_cmdline();
+if (cmdline != NULL) {
+process_info->set_command_line(allocate_string(cmdline));
+FREE_C_HEAP_ARRAY(char, cmdline);
+}
+return OS_OK;
+}
+int SystemProcessInterface::SystemProcesses::ProcessIterator::next_process() {
+struct dirent* entry;
+if (!is_valid()) {
+return OS_ERR;
+}
+do {
+entry = os::readdir(_dir, _entry);
+if (entry == NULL) {
+// error
+_valid = false;
+return OS_ERR;
+}
+if (_entry == NULL) {
+// reached end
+_valid = false;
+return OS_ERR;
+}
+} while(!is_valid_entry(_entry));
+_valid = true;
+return OS_OK;
+}
+SystemProcessInterface::SystemProcesses::ProcessIterator::ProcessIterator() {
+_dir = NULL;
+_entry = NULL;
+_valid = false;
+}
+bool SystemProcessInterface::SystemProcesses::ProcessIterator::initialize() {
+_dir = opendir("/proc");
+_entry = (struct dirent*)NEW_C_HEAP_ARRAY(char, sizeof(struct dirent) + NAME_MAX + 1, mtInternal);
+if (NULL == _entry) {
+return false;
+}
+_valid = true;
+next_process();
+return true;
+}
+SystemProcessInterface::SystemProcesses::ProcessIterator::~ProcessIterator() {
+if (_entry != NULL) {
+FREE_C_HEAP_ARRAY(char, _entry);
+}
+if (_dir != NULL) {
+closedir(_dir);
+}
+}
+SystemProcessInterface::SystemProcesses::SystemProcesses() {
+_iterator = NULL;
+}
+bool SystemProcessInterface::SystemProcesses::initialize() {
+_iterator = new SystemProcessInterface::SystemProcesses::ProcessIterator();
+return NULL == _iterator ? false : _iterator->initialize();
+}
+SystemProcessInterface::SystemProcesses::~SystemProcesses() {
+if (_iterator != NULL) {
+delete _iterator;
+}
+}
+int SystemProcessInterface::SystemProcesses::system_processes(SystemProcess** system_processes, int* no_of_sys_processes) const {
+assert(system_processes != NULL, "system_processes pointer is NULL!");
+assert(no_of_sys_processes != NULL, "system_processes counter pointers is NULL!");
+assert(_iterator != NULL, "iterator is NULL!");
+// initialize pointers
+*no_of_sys_processes = 0;
+*system_processes = NULL;
+while (_iterator->is_valid()) {
+SystemProcess* tmp = new SystemProcess();
+_iterator->current(tmp);
+//if already existing head
+if (*system_processes != NULL) {
+//move "first to second"
+tmp->set_next(*system_processes);
+}
+// new head
+*system_processes = tmp;
+// increment
+(*no_of_sys_processes)++;
+// step forward
+_iterator->next_process();
+}
+return OS_OK;
+}
+int SystemProcessInterface::system_processes(SystemProcess** system_procs, int* no_of_sys_processes) const {
+return _impl->system_processes(system_procs, no_of_sys_processes);
+}
+SystemProcessInterface::SystemProcessInterface() {
+_impl = NULL;
+}
+bool SystemProcessInterface::initialize() {
+_impl = new SystemProcessInterface::SystemProcesses();
+return NULL == _impl ? false : _impl->initialize();
+}
+SystemProcessInterface::~SystemProcessInterface() {
+if (_impl != NULL) {
+delete _impl;
+}
+}
+CPUInformationInterface::CPUInformationInterface() {
+_cpu_info = NULL;
+}
+bool CPUInformationInterface::initialize() {
+_cpu_info = new CPUInformation();
+if (NULL == _cpu_info) {
+return false;
+}
+_cpu_info->set_number_of_hardware_threads(VM_Version_Ext::number_of_threads());
+_cpu_info->set_number_of_cores(VM_Version_Ext::number_of_cores());
+_cpu_info->set_number_of_sockets(VM_Version_Ext::number_of_sockets());
+_cpu_info->set_cpu_name(VM_Version_Ext::cpu_name());
+_cpu_info->set_cpu_description(VM_Version_Ext::cpu_description());
+return true;
+}
+CPUInformationInterface::~CPUInformationInterface() {
+if (_cpu_info != NULL) {
+if (_cpu_info->cpu_name() != NULL) {
+const char* cpu_name = _cpu_info->cpu_name();
+FREE_C_HEAP_ARRAY(char, cpu_name);
+_cpu_info->set_cpu_name(NULL);
+}
+if (_cpu_info->cpu_description() != NULL) {
+const char* cpu_desc = _cpu_info->cpu_description();
+FREE_C_HEAP_ARRAY(char, cpu_desc);
+_cpu_info->set_cpu_description(NULL);
+}
+delete _cpu_info;
+}
+}
+int CPUInformationInterface::cpu_information(CPUInformation& cpu_info) {
+if (_cpu_info == NULL) {
+return OS_ERR;
+}
+cpu_info = *_cpu_info; // shallow copy assignment
+return OS_OK;
+}

changeset 50113	caf115bb98ad
child 50160	dc18db671651