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src/java.base/unix/native/libjava/ProcessHandleImpl_unix.c
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rev 12532 : 8131168: Refactor ProcessHandleImpl_*.c and add implememtation for AIX
Reviewed-by: rriggs, smarks
@@ -26,35 +26,91 @@
#include "jni.h"
#include "jni_util.h"
#include "java_lang_ProcessHandleImpl.h"
#include "java_lang_ProcessHandleImpl_Info.h"
+#include "ProcessHandleImpl_unix.h"
-#include <stdio.h>
+#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <pwd.h>
#include <signal.h>
#include <stdlib.h>
#include <unistd.h>
+#include <string.h>
+#include <dirent.h>
+#include <ctype.h>
+#include <limits.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
-#include <string.h>
-#include <dirent.h>
-#include <ctype.h>
+#ifdef _AIX
+#include <sys/procfs.h>
+#endif
+#ifdef __solaris__
+#include <procfs.h>
+#endif
/**
- * Implementations of ProcessHandleImpl functions that are common to all
- * Unix variants:
- * - waitForProcessExit0(pid, reap)
- * - getCurrentPid0()
- * - destroy0(pid, force)
+ * This file contains the implementation of the native ProcessHandleImpl
+ * functions which are common to all Unix variants.
+ *
+ * The currently supported Unix variants are Solaris, Linux, MaxOS X and AIX.
+ * The various similarities and differences between these systems make it hard
+ * to find a clear boundary between platform specific and shared code.
+ *
+ * In order to ease code sharing between the platforms while still keeping the
+ * code as clean as possible (i.e. free of preprocessor macros) we use the
+ * following source code layout (remember that ProcessHandleImpl_unix.c will
+ * be compiled on EVERY Unix platform while ProcessHandleImpl_<os>.c will be
+ * only compiled on the specific OS):
+ *
+ * - all the JNI wrappers for the ProcessHandleImpl functions go into this file
+ * - if their implementation is common on ALL the supported Unix platforms it
+ * goes right into the JNI wrappers
+ * - if the whole function or substantial parts of it are platform dependent,
+ * the implementation goes into os_<function_name> functions in
+ * ProcessHandleImpl_<os>.c
+ * - if at least two platforms implement an os_<function_name> function in the
+ * same way, this implementation is factored out into unix_<function_name>,
+ * placed into this file and called from the corresponding os_<function_name>
+ * function.
+ * - For convenience, all the os_ and unix_ functions are declared in
+ * ProcessHandleImpl_unix.h which is included into every
+ * ProcessHandleImpl_<os>.c file.
+ *
+ * Example 1:
+ * ----------
+ * The implementation of Java_java_lang_ProcessHandleImpl_initNative()
+ * is the same on all platforms except on Linux where it initilizes one
+ * additional field. So we place the implementation right into
+ * Java_java_lang_ProcessHandleImpl_initNative() but add call to
+ * os_init() at the end of the function which is empty on all platforms
+ * except Linux where it performs the additionally initializations.
+ *
+ * Example 2:
+ * ----------
+ * The implementation of Java_java_lang_ProcessHandleImpl_00024Info_info0 is the
+ * same on Solaris and AIX but different on Linux and MacOSX. We therefore simply
+ * call the helpers os_getParentPidAndTimings() and os_getCmdlineAndUserInfo().
+ * The Linux and MaxOS X versions of these functions (in the corresponding files
+ * ProcessHandleImpl_linux.c and ProcessHandleImpl_macosx.c) directly contain
+ * the platform specific implementations while the Solaris and AIX
+ * implementations simply call back to unix_getParentPidAndTimings() and
+ * unix_getCmdlineAndUserInfo() which are implemented right in this file.
+ *
+ * The term "same implementation" is still a question of interpretation. It my
+ * be acceptable to have a few ifdef'ed lines if that allows the sharing of a
+ * huge function. On the other hand, if the platform specific code in a shared
+ * function grows over a certain limit, it may be better to refactor that
+ * functionality into corresponding, platform-specific os_ functions.
*/
+
#ifndef WIFEXITED
#define WIFEXITED(status) (((status)&0xFF) == 0)
#endif
#ifndef WEXITSTATUS
@@ -67,10 +123,23 @@
#ifndef WTERMSIG
#define WTERMSIG(status) ((status)&0x7F)
#endif
+#ifdef __solaris__
+/* The child exited because of a signal.
+ * The best value to return is 0x80 + signal number,
+ * because that is what all Unix shells do, and because
+ * it allows callers to distinguish between process exit and
+ * process death by signal.
+ * Unfortunately, the historical behavior on Solaris is to return
+ * the signal number, and we preserve this for compatibility. */
+#define WTERMSIG_RETURN(status) WTERMSIG(status)
+#else
+#define WTERMSIG_RETURN(status) (WTERMSIG(status) + 0x80)
+#endif
+
#define RESTARTABLE(_cmd, _result) do { \
do { \
_result = _cmd; \
} while((_result == -1) && (errno == EINTR)); \
} while(0)
@@ -79,25 +148,87 @@
do { \
_result = _cmd; \
} while((_result == NULL) && (errno == EINTR)); \
} while(0)
-#ifdef __solaris__
- #define STAT_FILE "/proc/%d/status"
-#else
- #define STAT_FILE "/proc/%d/stat"
-#endif
+
+/* Field id for jString 'command' in java.lang.ProcessHandleImpl.Info */
+jfieldID ProcessHandleImpl_Info_commandID;
+
+/* Field id for jString 'commandLine' in java.lang.ProcessHandleImpl.Info */
+jfieldID ProcessHandleImpl_Info_commandLineID;
+
+/* Field id for jString[] 'arguments' in java.lang.ProcessHandleImpl.Info */
+jfieldID ProcessHandleImpl_Info_argumentsID;
+
+/* Field id for jlong 'totalTime' in java.lang.ProcessHandleImpl.Info */
+jfieldID ProcessHandleImpl_Info_totalTimeID;
+
+/* Field id for jlong 'startTime' in java.lang.ProcessHandleImpl.Info */
+jfieldID ProcessHandleImpl_Info_startTimeID;
+
+/* Field id for jString 'user' in java.lang.ProcessHandleImpl.Info */
+jfieldID ProcessHandleImpl_Info_userID;
+
+/* Size of password or group entry when not available via sysconf */
+#define ENT_BUF_SIZE 1024
+/* The value for the size of the buffer used by getpwuid_r(). The result of */
+/* sysconf(_SC_GETPW_R_SIZE_MAX) if available or ENT_BUF_SIZE otherwise. */
+static long getpw_buf_size;
+
+/**************************************************************
+ * Static method to initialize field IDs and the ticks per second rate.
+ *
+ * Class: java_lang_ProcessHandleImpl_Info
+ * Method: initIDs
+ * Signature: ()V
+ */
+JNIEXPORT void JNICALL
+Java_java_lang_ProcessHandleImpl_00024Info_initIDs(JNIEnv *env, jclass clazz) {
+
+ CHECK_NULL(ProcessHandleImpl_Info_commandID =
+ (*env)->GetFieldID(env, clazz, "command", "Ljava/lang/String;"));
+ CHECK_NULL(ProcessHandleImpl_Info_commandLineID =
+ (*env)->GetFieldID(env, clazz, "commandLine", "Ljava/lang/String;"));
+ CHECK_NULL(ProcessHandleImpl_Info_argumentsID =
+ (*env)->GetFieldID(env, clazz, "arguments", "[Ljava/lang/String;"));
+ CHECK_NULL(ProcessHandleImpl_Info_totalTimeID =
+ (*env)->GetFieldID(env, clazz, "totalTime", "J"));
+ CHECK_NULL(ProcessHandleImpl_Info_startTimeID =
+ (*env)->GetFieldID(env, clazz, "startTime", "J"));
+ CHECK_NULL(ProcessHandleImpl_Info_userID =
+ (*env)->GetFieldID(env, clazz, "user", "Ljava/lang/String;"));
+}
+
+/***********************************************************
+ * Static method to initialize platform dependent constants.
+ *
+ * Class: java_lang_ProcessHandleImpl
+ * Method: initNative
+ * Signature: ()V
+ */
+JNIEXPORT void JNICALL
+Java_java_lang_ProcessHandleImpl_initNative(JNIEnv *env, jclass clazz) {
+ getpw_buf_size = sysconf(_SC_GETPW_R_SIZE_MAX);
+ if (getpw_buf_size == -1) {
+ getpw_buf_size = ENT_BUF_SIZE;
+ }
+ os_initNative(env, clazz);
+}
/* Block until a child process exits and return its exit code.
* Note, can only be called once for any given pid if reapStatus = true.
+ *
+ * Class: java_lang_ProcessHandleImpl
+ * Method: waitForProcessExit0
+ * Signature: (JZ)I
*/
JNIEXPORT jint JNICALL
Java_java_lang_ProcessHandleImpl_waitForProcessExit0(JNIEnv* env,
jclass junk,
jlong jpid,
- jboolean reapStatus)
-{
+ jboolean reapStatus) {
pid_t pid = (pid_t)jpid;
errno = 0;
if (reapStatus != JNI_FALSE) {
/* Wait for the child process to exit.
@@ -115,22 +246,11 @@
}
if (WIFEXITED(status)) {
return WEXITSTATUS(status);
} else if (WIFSIGNALED(status)) {
- /* The child exited because of a signal.
- * The best value to return is 0x80 + signal number,
- * because that is what all Unix shells do, and because
- * it allows callers to distinguish between process exit and
- * process death by signal.
- * Unfortunately, the historical behavior on Solaris is to return
- * the signal number, and we preserve this for compatibility. */
-#ifdef __solaris__
- return WTERMSIG(status);
-#else
- return 0x80 + WTERMSIG(status);
-#endif
+ return WTERMSIG_RETURN(status);
} else {
return status;
}
} else {
/*
@@ -154,22 +274,11 @@
/*
* The child exited normally; get its exit code.
*/
return siginfo.si_status;
} else if (siginfo.si_code == CLD_KILLED || siginfo.si_code == CLD_DUMPED) {
- /* The child exited because of a signal.
- * The best value to return is 0x80 + signal number,
- * because that is what all Unix shells do, and because
- * it allows callers to distinguish between process exit and
- * process death by signal.
- * Unfortunately, the historical behavior on Solaris is to return
- * the signal number, and we preserve this for compatibility. */
- #ifdef __solaris__
- return WTERMSIG(siginfo.si_status);
- #else
- return 0x80 + WTERMSIG(siginfo.si_status);
- #endif
+ return WTERMSIG_RETURN(siginfo.si_status);
} else {
/*
* Unknown exit code; pass it through.
*/
return siginfo.si_status;
@@ -189,11 +298,11 @@
}
/*
* Class: java_lang_ProcessHandleImpl
* Method: destroy0
- * Signature: (Z)Z
+ * Signature: (JJZ)Z
*/
JNIEXPORT jboolean JNICALL
Java_java_lang_ProcessHandleImpl_destroy0(JNIEnv *env,
jobject obj,
jlong jpid,
@@ -208,123 +317,56 @@
} else {
return JNI_FALSE;
}
}
-/**
- * Size of password or group entry when not available via sysconf
- */
-#define ENT_BUF_SIZE 1024
-
-/**
- * Return a strong username for the uid_t or null.
+/*
+ * Returns the children of the requested pid and optionally each parent and
+ * start time.
+ * Accumulates any process who parent pid matches.
+ * The resulting pids are stored into the array of longs.
+ * The number of pids is returned if they all fit.
+ * If the array is too short, the negative of the desired length is returned.
+ * Class: java_lang_ProcessHandleImpl
+ * Method: getProcessPids0
+ * Signature: (J[J[J[J)I
*/
-jstring uidToUser(JNIEnv* env, uid_t uid) {
- int result = 0;
- int buflen;
- char* pwbuf;
- jstring name = NULL;
-
- /* allocate buffer for password record */
- buflen = (int)sysconf(_SC_GETPW_R_SIZE_MAX);
- if (buflen == -1)
- buflen = ENT_BUF_SIZE;
- pwbuf = (char*)malloc(buflen);
- if (pwbuf == NULL) {
- JNU_ThrowOutOfMemoryError(env, "Unable to open getpwent");
- } else {
- struct passwd pwent;
- struct passwd* p = NULL;
-
-#ifdef __solaris__
- RESTARTABLE_RETURN_PTR(getpwuid_r(uid, &pwent, pwbuf, (size_t)buflen), p);
-#else
- RESTARTABLE(getpwuid_r(uid, &pwent, pwbuf, (size_t)buflen, &p), result);
-#endif
-
- // Return the Java String if a name was found
- if (result == 0 && p != NULL &&
- p->pw_name != NULL && *(p->pw_name) != '\0') {
- name = JNU_NewStringPlatform(env, p->pw_name);
- }
- free(pwbuf);
- }
- return name;
+JNIEXPORT jint JNICALL
+Java_java_lang_ProcessHandleImpl_getProcessPids0(JNIEnv *env,
+ jclass clazz,
+ jlong jpid,
+ jlongArray jarray,
+ jlongArray jparentArray,
+ jlongArray jstimesArray) {
+ return os_getChildren(env, jpid, jarray, jparentArray, jstimesArray);
}
-/**
- * Implementations of ProcessHandleImpl functions that are common to
- * (some) Unix variants:
- * - getProcessPids0(pid, pidArray, parentArray)
- */
-
-#if defined(__linux__) || defined(__AIX__)
-
/*
- * Signatures for internal OS specific functions.
- */
-static pid_t getStatInfo(JNIEnv *env, pid_t pid,
- jlong *totalTime, jlong* startTime);
-static void getCmdlineInfo(JNIEnv *env, pid_t pid, jobject jinfo);
-static long long getBoottime(JNIEnv *env);
-
-jstring uidToUser(JNIEnv* env, uid_t uid);
-
-/* Field id for jString 'command' in java.lang.ProcessHandleImpl.Info */
-static jfieldID ProcessHandleImpl_Info_commandID;
-
-/* Field id for jString[] 'arguments' in java.lang.ProcessHandleImpl.Info */
-static jfieldID ProcessHandleImpl_Info_argumentsID;
-
-/* Field id for jlong 'totalTime' in java.lang.ProcessHandleImpl.Info */
-static jfieldID ProcessHandleImpl_Info_totalTimeID;
-
-/* Field id for jlong 'startTime' in java.lang.ProcessHandleImpl.Info */
-static jfieldID ProcessHandleImpl_Info_startTimeID;
-
-/* Field id for jString 'user' in java.lang.ProcessHandleImpl.Info */
-static jfieldID ProcessHandleImpl_Info_userID;
-
-/* static value for clock ticks per second. */
-static long clock_ticks_per_second;
-
-/* A static offset in milliseconds since boot. */
-static long long bootTime_ms;
-
-/**************************************************************
- * Static method to initialize field IDs and the ticks per second rate.
+ * Fill in the Info object from the OS information about the process.
*
* Class: java_lang_ProcessHandleImpl_Info
- * Method: initIDs
- * Signature: ()V
+ * Method: info0
+ * Signature: (Ljava/lang/ProcessHandle/Info;J)I
*/
JNIEXPORT void JNICALL
-Java_java_lang_ProcessHandleImpl_00024Info_initIDs(JNIEnv *env, jclass clazz) {
+Java_java_lang_ProcessHandleImpl_00024Info_info0(JNIEnv *env,
+ jobject jinfo,
+ jlong jpid) {
+ pid_t pid = (pid_t) jpid;
+ pid_t ppid;
+ jlong totalTime = -1L;
+ jlong startTime = -1L;
- CHECK_NULL(ProcessHandleImpl_Info_commandID = (*env)->GetFieldID(env,
- clazz, "command", "Ljava/lang/String;"));
- CHECK_NULL(ProcessHandleImpl_Info_argumentsID = (*env)->GetFieldID(env,
- clazz, "arguments", "[Ljava/lang/String;"));
- CHECK_NULL(ProcessHandleImpl_Info_totalTimeID = (*env)->GetFieldID(env,
- clazz, "totalTime", "J"));
- CHECK_NULL(ProcessHandleImpl_Info_startTimeID = (*env)->GetFieldID(env,
- clazz, "startTime", "J"));
- CHECK_NULL(ProcessHandleImpl_Info_userID = (*env)->GetFieldID(env,
- clazz, "user", "Ljava/lang/String;"));
-}
+ ppid = os_getParentPidAndTimings(env, pid, &totalTime, &startTime);
+ if (ppid >= 0) {
+ (*env)->SetLongField(env, jinfo, ProcessHandleImpl_Info_totalTimeID, totalTime);
+ JNU_CHECK_EXCEPTION(env);
-/**************************************************************
- * Static method to initialize the ticks per second rate.
- *
- * Class: java_lang_ProcessHandleImpl
- * Method: initNative
- * Signature: ()V
- */
-JNIEXPORT void JNICALL
-Java_java_lang_ProcessHandleImpl_initNative(JNIEnv *env, jclass clazz) {
- clock_ticks_per_second = sysconf(_SC_CLK_TCK);
- bootTime_ms = getBoottime(env);
+ (*env)->SetLongField(env, jinfo, ProcessHandleImpl_Info_startTimeID, startTime);
+ JNU_CHECK_EXCEPTION(env);
+ }
+ os_getCmdlineAndUserInfo(env, jinfo, pid);
}
/*
* Check if a process is alive.
* Return the start time (ms since 1970) if it is available.
@@ -338,62 +380,131 @@
JNIEXPORT jlong JNICALL
Java_java_lang_ProcessHandleImpl_isAlive0(JNIEnv *env, jobject obj, jlong jpid) {
pid_t pid = (pid_t) jpid;
jlong startTime = 0L;
jlong totalTime = 0L;
- pid_t ppid = getStatInfo(env, pid, &totalTime, &startTime);
- return (ppid <= 0) ? -1 : startTime;
+ pid_t ppid = os_getParentPidAndTimings(env, pid, &totalTime, &startTime);
+ return (ppid < 0) ? -1 : startTime;
}
/*
* Returns the parent pid of the requested pid.
* The start time of the process must match (or be ANY).
*
* Class: java_lang_ProcessHandleImpl
* Method: parent0
- * Signature: (J)J
+ * Signature: (JJ)J
*/
JNIEXPORT jlong JNICALL
Java_java_lang_ProcessHandleImpl_parent0(JNIEnv *env,
jobject obj,
jlong jpid,
jlong startTime) {
pid_t pid = (pid_t) jpid;
pid_t ppid;
- pid_t mypid = getpid();
- if (pid == mypid) {
+ if (pid == getpid()) {
ppid = getppid();
} else {
- jlong start = 0L;;
+ jlong start = 0L;
jlong total = 0L; // unused
- ppid = getStatInfo(env, pid, &total, &start);
+ ppid = os_getParentPidAndTimings(env, pid, &total, &start);
if (start != startTime && start != 0 && startTime != 0) {
ppid = -1;
}
}
return (jlong) ppid;
}
+/**
+ * Construct the argument array by parsing the arguments from the sequence
+ * of arguments.
+ */
+void unix_fillArgArray(JNIEnv *env, jobject jinfo, int nargs, char *cp,
+ char *argsEnd, jstring cmdexe, char *cmdline) {
+ jobject argsArray;
+ int i;
+
+ (*env)->SetObjectField(env, jinfo, ProcessHandleImpl_Info_commandID, cmdexe);
+ JNU_CHECK_EXCEPTION(env);
+
+ if (nargs >= 1) {
+ // Create a String array for nargs-1 elements
+ argsArray = (*env)->NewObjectArray(env, nargs - 1, JNU_ClassString(env), NULL);
+ CHECK_NULL(argsArray);
+
+ for (i = 0; i < nargs - 1; i++) {
+ jstring str = NULL;
+
+ cp += strlen(cp) + 1;
+ if (cp > argsEnd || *cp == '\0') {
+ return; // Off the end pointer or an empty argument is an error
+ }
+
+ CHECK_NULL((str = JNU_NewStringPlatform(env, cp)));
+
+ (*env)->SetObjectArrayElement(env, argsArray, i, str);
+ JNU_CHECK_EXCEPTION(env);
+ }
+ (*env)->SetObjectField(env, jinfo, ProcessHandleImpl_Info_argumentsID, argsArray);
+ JNU_CHECK_EXCEPTION(env);
+ }
+ if (cmdline != NULL) {
+ jstring commandLine = NULL;
+ CHECK_NULL((commandLine = JNU_NewStringPlatform(env, cmdline)));
+ (*env)->SetObjectField(env, jinfo, ProcessHandleImpl_Info_commandLineID, commandLine);
+ JNU_CHECK_EXCEPTION(env);
+ }
+}
+
+void unix_getUserInfo(JNIEnv* env, jobject jinfo, uid_t uid) {
+ int result = 0;
+ char* pwbuf;
+ jstring name = NULL;
+
+ /* allocate buffer for password record */
+ pwbuf = (char*)malloc(getpw_buf_size);
+ if (pwbuf == NULL) {
+ JNU_ThrowOutOfMemoryError(env, "Unable to open getpwent");
+ } else {
+ struct passwd pwent;
+ struct passwd* p = NULL;
+
+#ifdef __solaris__
+ RESTARTABLE_RETURN_PTR(getpwuid_r(uid, &pwent, pwbuf, (size_t)getpw_buf_size), p);
+#else
+ RESTARTABLE(getpwuid_r(uid, &pwent, pwbuf, (size_t)getpw_buf_size, &p), result);
+#endif
+
+ // Create the Java String if a name was found
+ if (result == 0 && p != NULL &&
+ p->pw_name != NULL && *(p->pw_name) != '\0') {
+ name = JNU_NewStringPlatform(env, p->pw_name);
+ }
+ free(pwbuf);
+ }
+ if (name != NULL) {
+ (*env)->SetObjectField(env, jinfo, ProcessHandleImpl_Info_userID, name);
+ }
+}
+
/*
- * Returns the children of the requested pid and optionally each parent.
+ * The following functions are common on Solaris, Linux and AIX.
+ */
+
+#if defined(__solaris__) || defined (__linux__) || defined(_AIX)
+
+/*
+ * Returns the children of the requested pid and optionally each parent and
+ * start time.
* Reads /proc and accumulates any process who parent pid matches.
* The resulting pids are stored into the array of longs.
* The number of pids is returned if they all fit.
- * If the array is too short, the negative of the desired length is returned. *
- * Class: java_lang_ProcessHandleImpl
- * Method: getChildPids
- * Signature: (J[J[J)I
+ * If the array is too short, the negative of the desired length is returned.
*/
-JNIEXPORT jint JNICALL
-Java_java_lang_ProcessHandleImpl_getProcessPids0(JNIEnv *env,
- jclass clazz,
- jlong jpid,
- jlongArray jarray,
- jlongArray jparentArray,
- jlongArray jstimesArray) {
-
+jint unix_getChildren(JNIEnv *env, jlong jpid, jlongArray jarray,
+ jlongArray jparentArray, jlongArray jstimesArray) {
DIR* dir;
struct dirent* ptr;
pid_t pid = (pid_t) jpid;
jlong* pids = NULL;
jlong* ppids = NULL;
@@ -460,13 +571,14 @@
/* skip files that aren't numbers */
pid_t childpid = (pid_t) atoi(ptr->d_name);
if ((int) childpid <= 0) {
continue;
}
- // Read /proc/pid/stat and get the parent pid, and start time
- ppid = getStatInfo(env, childpid, &totalTime, &startTime);
- if (ppid > 0 && (pid == 0 || ppid == pid)) {
+
+ // Get the parent pid, and start time
+ ppid = os_getParentPidAndTimings(env, childpid, &totalTime, &startTime);
+ if (ppid >= 0 && (pid == 0 || ppid == pid)) {
if (count < arraySize) {
// Only store if it fits
pids[count] = (jlong) childpid;
if (ppids != NULL) {
@@ -496,295 +608,112 @@
closedir(dir);
// If more pids than array had size for; count will be greater than array size
return count;
}
-
-/**************************************************************
- * Implementation of ProcessHandleImpl_Info native methods.
- */
+#endif // defined(__solaris__) || defined (__linux__) || defined(_AIX)
/*
- * Fill in the Info object from the OS information about the process.
- *
- * Class: java_lang_ProcessHandleImpl_Info
- * Method: info0
- * Signature: (JLjava/lang/ProcessHandle/Info;)I
+ * The following functions are common on Solaris and AIX.
*/
-JNIEXPORT void JNICALL
-Java_java_lang_ProcessHandleImpl_00024Info_info0(JNIEnv *env,
- jobject jinfo,
- jlong jpid) {
- pid_t pid = (pid_t) jpid;
- pid_t ppid;
- jlong totalTime = 0L;
- jlong startTime = -1L;
- ppid = getStatInfo(env, pid, &totalTime, &startTime);
- if (ppid > 0) {
- (*env)->SetLongField(env, jinfo, ProcessHandleImpl_Info_totalTimeID, totalTime);
- JNU_CHECK_EXCEPTION(env);
-
- (*env)->SetLongField(env, jinfo, ProcessHandleImpl_Info_startTimeID, startTime);
- JNU_CHECK_EXCEPTION(env);
-
- getCmdlineInfo(env, pid, jinfo);
- }
-}
+#if defined(__solaris__) || defined(_AIX)
/**
- * Read /proc/<pid>/stat and return the ppid, total cputime and start time.
- * -1 is fail; zero is unknown; > 0 is parent pid
+ * Helper function to get the 'psinfo_t' data from "/proc/%d/psinfo".
+ * Returns 0 on success and -1 on error.
*/
-static pid_t getStatInfo(JNIEnv *env, pid_t pid,
- jlong *totalTime, jlong* startTime) {
+static int getPsinfo(pid_t pid, psinfo_t *psinfo) {
FILE* fp;
- char buffer[2048];
- int statlen;
char fn[32];
- char* s;
- int parentPid;
- long unsigned int utime = 0; // clock tics
- long unsigned int stime = 0; // clock tics
- long long unsigned int start = 0; // microseconds
+ int ret;
/*
- * Try to stat and then open /proc/%d/stat
+ * Try to open /proc/%d/psinfo
*/
- snprintf(fn, sizeof fn, STAT_FILE, pid);
-
+ snprintf(fn, sizeof fn, "/proc/%d/psinfo", pid);
fp = fopen(fn, "r");
if (fp == NULL) {
- return -1; // fail, no such /proc/pid/stat
+ return -1;
}
- /*
- * The format is: pid (command) state ppid ...
- * As the command could be anything we must find the right most
- * ")" and then skip the white spaces that follow it.
- */
- statlen = fread(buffer, 1, (sizeof buffer - 1), fp);
+ ret = fread(psinfo, 1, sizeof(psinfo_t), fp);
fclose(fp);
- if (statlen < 0) {
- return 0; // parent pid is not available
- }
-
- buffer[statlen] = '\0';
- s = strchr(buffer, '(');
- if (s == NULL) {
- return 0; // parent pid is not available
- }
- // Found start of command, skip to end
- s++;
- s = strrchr(s, ')');
- if (s == NULL) {
- return 0; // parent pid is not available
- }
- s++;
-
- // Scan the needed fields from status, retaining only ppid(4),
- // utime (14), stime(15), starttime(22)
- if (4 != sscanf(s, " %*c %d %*d %*d %*d %*d %*d %*u %*u %*u %*u %lu %lu %*d %*d %*d %*d %*d %*d %llu",
- &parentPid, &utime, &stime, &start)) {
- return 0; // not all values parsed; return error
+ if (ret < sizeof(psinfo_t)) {
+ return -1;
}
-
- *totalTime = (utime + stime) * (jlong)(1000000000 / clock_ticks_per_second);
-
- *startTime = bootTime_ms + ((start * 1000) / clock_ticks_per_second);
-
- return parentPid;
+ return 0;
}
/**
- * Construct the argument array by parsing the arguments from the sequence
- * of arguments. The zero'th arg is the command executable
+ * Read /proc/<pid>/psinfo and return the ppid, total cputime and start time.
+ * Return: -1 is fail; >= 0 is parent pid
+ * 'total' will contain the running time of 'pid' in nanoseconds.
+ * 'start' will contain the start time of 'pid' in milliseconds since epoch.
*/
-static int fillArgArray(JNIEnv *env, jobject jinfo,
- int nargs, char *cp, char *argsEnd, jstring cmdexe) {
- jobject argsArray;
- int i;
-
- if (nargs < 1) {
- return 0;
- }
+pid_t unix_getParentPidAndTimings(JNIEnv *env, pid_t pid,
+ jlong *totalTime, jlong* startTime) {
+ psinfo_t psinfo;
- if (cmdexe == NULL) {
- // Create a string from arg[0]
- CHECK_NULL_RETURN((cmdexe = JNU_NewStringPlatform(env, cp)), -1);
+ if (getPsinfo(pid, &psinfo) < 0) {
+ return -1;
}
- (*env)->SetObjectField(env, jinfo, ProcessHandleImpl_Info_commandID, cmdexe);
- JNU_CHECK_EXCEPTION_RETURN(env, -3);
-
- // Create a String array for nargs-1 elements
- argsArray = (*env)->NewObjectArray(env, nargs - 1, JNU_ClassString(env), NULL);
- CHECK_NULL_RETURN(argsArray, -1);
- for (i = 0; i < nargs - 1; i++) {
- jstring str = NULL;
-
- cp += strnlen(cp, (argsEnd - cp)) + 1;
- if (cp > argsEnd || *cp == '\0') {
- return -2; // Off the end pointer or an empty argument is an error
- }
+ *totalTime = psinfo.pr_time.tv_sec * 1000000000L + psinfo.pr_time.tv_nsec;
- CHECK_NULL_RETURN((str = JNU_NewStringPlatform(env, cp)), -1);
+ *startTime = psinfo.pr_start.tv_sec * (jlong)1000 +
+ psinfo.pr_start.tv_nsec / 1000000;
- (*env)->SetObjectArrayElement(env, argsArray, i, str);
- JNU_CHECK_EXCEPTION_RETURN(env, -3);
- }
- (*env)->SetObjectField(env, jinfo, ProcessHandleImpl_Info_argumentsID, argsArray);
- JNU_CHECK_EXCEPTION_RETURN(env, -4);
- return 0;
+ return (pid_t) psinfo.pr_ppid;
}
-
-static void getCmdlineInfo(JNIEnv *env, pid_t pid, jobject jinfo) {
- int fd;
- int cmdlen = 0;
- char *cmdline = NULL, *cmdEnd; // used for command line args and exe
- jstring cmdexe = NULL;
+void unix_getCmdlineAndUserInfo(JNIEnv *env, jobject jinfo, pid_t pid) {
+ psinfo_t psinfo;
char fn[32];
- struct stat stat_buf;
-
- /*
- * Try to open /proc/%d/cmdline
- */
- snprintf(fn, sizeof fn, "/proc/%d/cmdline", pid);
- if ((fd = open(fn, O_RDONLY)) < 0) {
- return;
- }
-
- do { // Block to break out of on errors
- int i;
- char *s;
-
- cmdline = (char*)malloc(PATH_MAX);
- if (cmdline == NULL) {
- break;
- }
+ char exePath[PATH_MAX];
+ char prargs[PRARGSZ + 1];
+ jstring cmdexe = NULL;
+ int ret;
/*
- * The path to the executable command is the link in /proc/<pid>/exe.
+ * On Solaris, the full path to the executable command is the link in
+ * /proc/<pid>/paths/a.out. But it is only readable for processes we own.
*/
- snprintf(fn, sizeof fn, "/proc/%d/exe", pid);
- if ((cmdlen = readlink(fn, cmdline, PATH_MAX - 1)) > 0) {
+#if defined(__solaris__)
+ snprintf(fn, sizeof fn, "/proc/%d/path/a.out", pid);
+ if ((ret = readlink(fn, exePath, PATH_MAX - 1)) > 0) {
// null terminate and create String to store for command
- cmdline[cmdlen] = '\0';
- cmdexe = JNU_NewStringPlatform(env, cmdline);
- (*env)->ExceptionClear(env); // unconditionally clear any exception
+ exePath[ret] = '\0';
+ CHECK_NULL(cmdexe = JNU_NewStringPlatform(env, exePath));
}
+#endif
/*
- * The buffer format is the arguments nul terminated with an extra nul.
+ * Now try to open /proc/%d/psinfo
*/
- cmdlen = read(fd, cmdline, PATH_MAX-1);
- if (cmdlen < 0) {
- break;
- }
-
- // Terminate the buffer and count the arguments
- cmdline[cmdlen] = '\0';
- cmdEnd = &cmdline[cmdlen + 1];
- for (s = cmdline,i = 0; *s != '\0' && (s < cmdEnd); i++) {
- s += strnlen(s, (cmdEnd - s)) + 1;
- }
-
- if (fillArgArray(env, jinfo, i, cmdline, cmdEnd, cmdexe) < 0) {
- break;
- }
-
- // Get and store the user name
- if (fstat(fd, &stat_buf) == 0) {
- jstring name = uidToUser(env, stat_buf.st_uid);
- if (name != NULL) {
- (*env)->SetObjectField(env, jinfo, ProcessHandleImpl_Info_userID, name);
- }
- }
- } while (0);
-
- if (cmdline != NULL) {
- free(cmdline);
- }
- if (fd >= 0) {
- close(fd);
- }
-}
-
-/**
- * Read the boottime from /proc/stat.
- */
-static long long getBoottime(JNIEnv *env) {
- FILE *fp;
- char *line = NULL;
- size_t len = 0;
- long long bootTime = 0;
-
- fp = fopen("/proc/stat", "r");
- if (fp == NULL) {
- return -1;
- }
-
- while (getline(&line, &len, fp) != -1) {
- if (sscanf(line, "btime %llu", &bootTime) == 1) {
- break;
- }
- }
- free(line);
-
- if (fp != 0) {
- fclose(fp);
+ if (getPsinfo(pid, &psinfo) < 0) {
+ unix_fillArgArray(env, jinfo, 0, NULL, NULL, cmdexe, NULL);
+ return;
}
- return bootTime * 1000;
-}
-
-#endif // defined(__linux__) || defined(__AIX__)
-
-
-/* Block until a child process exits and return its exit code.
- Note, can only be called once for any given pid. */
-JNIEXPORT jint JNICALL
-Java_java_lang_ProcessImpl_waitForProcessExit(JNIEnv* env,
- jobject junk,
- jint pid)
-{
- /* We used to use waitid() on Solaris, waitpid() on Linux, but
- * waitpid() is more standard, so use it on all POSIX platforms. */
- int status;
- /* Wait for the child process to exit. This returns immediately if
- the child has already exited. */
- while (waitpid(pid, &status, 0) < 0) {
- switch (errno) {
- case ECHILD: return 0;
- case EINTR: break;
- default: return -1;
- }
- }
+ unix_getUserInfo(env, jinfo, psinfo.pr_uid);
- if (WIFEXITED(status)) {
/*
- * The child exited normally; get its exit code.
+ * Now read psinfo.pr_psargs which contains the first PRARGSZ characters of the
+ * argument list (i.e. arg[0] arg[1] ...). Unfortunately, PRARGSZ is usually set
+ * to 80 characters only. Nevertheless it's better than nothing :)
*/
- return WEXITSTATUS(status);
- } else if (WIFSIGNALED(status)) {
- /* The child exited because of a signal.
- * The best value to return is 0x80 + signal number,
- * because that is what all Unix shells do, and because
- * it allows callers to distinguish between process exit and
- * process death by signal.
- * Unfortunately, the historical behavior on Solaris is to return
- * the signal number, and we preserve this for compatibility. */
-#ifdef __solaris__
- return WTERMSIG(status);
-#else
- return 0x80 + WTERMSIG(status);
-#endif
- } else {
- /*
- * Unknown exit code; pass it through.
+ strncpy(prargs, psinfo.pr_psargs, PRARGSZ);
+ prargs[PRARGSZ] = '\0';
+ if (prargs[0] == '\0') {
+ /* If psinfo.pr_psargs didn't contain any strings, use psinfo.pr_fname
+ * (which only contains the last component of exec()ed pathname) as a
+ * last resort. This is true for AIX kernel processes for example.
*/
- return status;
+ strncpy(prargs, psinfo.pr_fname, PRARGSZ);
+ prargs[PRARGSZ] = '\0';
}
+ unix_fillArgArray(env, jinfo, 0, NULL, NULL, cmdexe,
+ prargs[0] == '\0' ? NULL : prargs);
}
-
+#endif // defined(__solaris__) || defined(_AIX)
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