Get the process start time

Get the process start time on linux, windows, osx, aix and
z/os.

Issue: eclipse#7201
Signed-off-by: Amarpreet Singh <Amarpreet.A.Singh@ibm.com>

fvtest/porttest/si.cpp

@@ -37,21 +37,30 @@
 #include <sched.h>
 #include <fstream>
 #include <regex>
+#include <sys/wait.h>
+#include <unistd.h>
 #endif /* defined(LINUX) */
 #if defined(OMR_OS_WINDOWS)
 #include <direct.h>
+#include <windows.h>
 #endif /* defined(OMR_OS_WINDOWS) */
 #if !defined(OMR_OS_WINDOWS)
 #include <grp.h>
 #include <errno.h>
 #if defined(J9ZOS390)
 #include <limits.h>
+#include <sys/wait.h>
+#include <unistd.h>
 #else
 #define __STDC_LIMIT_MACROS
 #include <stdint.h> /* For INT64_MAX. */
 #endif /* defined(J9ZOS390) */
 #include <sys/resource.h> /* For RLIM_INFINITY */
 #endif /* !defined(OMR_OS_WINDOWS) */
+#if defined(OSX) || defined(AIXPPC)
+#include <sys/wait.h>
+#include <unistd.h>
+#endif /* defined(LINUX) */
 
 #if defined(J9ZOS390) && !defined(OMR_EBCDIC)
 #include "atoe.h"
@@ -3119,3 +3128,56 @@ TEST(PortSysinfoTest, GetProcessorDescription)
 		ASSERT_TRUE(feature == TRUE || feature == FALSE);
 	}
 }
+
+/**
+ * Test GetProcessorStartTimeOfNonExistingProcessTest.
+ */
+TEST(PortSysinfoTest, GetProcessorStartTimeOfNonExistingProcessTest)
+{
+	OMRPORT_ACCESS_FROM_OMRPORT(portTestEnv->getPortLibrary());
+	uintptr_t pid = UINTPTR_MAX;
+	uint64_t expectedProcessStartTimeInNanoseconds = 0;
+	uint64_t actualProcessStartTimeInNanoseconds = omrsysinfo_get_process_start_time(pid);
+	ASSERT_EQ(expectedProcessStartTimeInNanoseconds, actualProcessStartTimeInNanoseconds);
+}
+
+/**
+ * Test GetProcessorStartTimeOfExistingProcessTest.
+ */
+TEST(PortSysinfoTest, GetProcessorStartTimeOfExistingProcessTest)
+{
+	OMRPORT_ACCESS_FROM_OMRPORT(portTestEnv->getPortLibrary());
+	uintptr_t pid = UINTPTR_MAX;
+	uintptr_t success = 0;
+	uint64_t testStartTimeInNanoseconds = omrtime_current_time_nanos(&success);
+	uint64_t processStartTimeInNanoseconds = 0;
+#if defined(LINUX) || defined(OSX) || defined(AIXPPC) || defined(J9ZOS390)
+	int status = 0;
+	sleep(3);
+	pid = fork();
+	ASSERT_NE(pid, -1);
+	if (0 == pid) {
+		sleep(10);
+		exit(0);
+		return;
+	}
+	processStartTimeInNanoseconds = omrsysinfo_get_process_start_time(pid);
+	waitpid(pid, &status, 0);
+#elif defined(OMR_OS_WINDOWS) /* defined(LINUX) || defined(OSX) || defined(AIXPPC) || defined(J9ZOS390) */
+	STARTUPINFO si;
+	PROCESS_INFORMATION pi;
+	BOOL ret = FALSE;
+	ZeroMemory(&si, sizeof(si));
+	si.cb = sizeof(si);
+	ZeroMemory(&pi, sizeof(pi));
+	ret = CreateProcess(NULL, "cmd.exe /c timeout /t 10", NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi);
+	ASSERT_EQ(ret, TRUE);
+	pid = (uintptr_t)GetProcessId(pi.hProcess);
+	processStartTimeInNanoseconds = omrsysinfo_get_process_start_time(pid);
+	WaitForSingleObject(pi.hProcess, INFINITE);
+	CloseHandle(pi.hProcess);
+	CloseHandle(pi.hThread);
+#endif /* defined(LINUX) || defined(OSX) || defined(AIXPPC) || defined(J9ZOS390) */
+	ASSERT_GT(processStartTimeInNanoseconds, testStartTimeInNanoseconds);
+	ASSERT_LT(processStartTimeInNanoseconds, omrtime_current_time_nanos(&success));
+}

include_core/omrport.h

@@ -2459,6 +2459,8 @@ typedef struct OMRPortLibrary {
 	int32_t (*sysinfo_cgroup_subsystem_iterator_next)(struct OMRPortLibrary *portLibrary, struct OMRCgroupMetricIteratorState *state, struct OMRCgroupMetricElement *metricElement);
 	/** see @ref omrsysinfo.c::omrsysinfo_cgroup_subsystem_iterator_destroy "omrsysinfo_cgroup_subsystem_iterator_destroy"*/
 	void (*sysinfo_cgroup_subsystem_iterator_destroy)(struct OMRPortLibrary *portLibrary, struct OMRCgroupMetricIteratorState *state);
+	/** see @ref omrsysinfo.c::omrsysinfo_get_process_start_time "omrsysinfo_get_process_start_time"*/
+	uint64_t (*sysinfo_get_process_start_time)(struct OMRPortLibrary *portLibrary, uintptr_t pid);
 	/** see @ref omrport.c::omrport_init_library "omrport_init_library"*/
 	int32_t (*port_init_library)(struct OMRPortLibrary *portLibrary, uintptr_t size) ;
 	/** see @ref omrport.c::omrport_startup_library "omrport_startup_library"*/
@@ -3102,6 +3104,7 @@ extern J9_CFUNC int32_t omrport_getVersion(struct OMRPortLibrary *portLibrary);
 #define omrsysinfo_cgroup_subsystem_iterator_metricKey(param1, param2) privateOmrPortLibrary->sysinfo_cgroup_subsystem_iterator_metricKey(privateOmrPortLibrary, param1, param2)
 #define omrsysinfo_cgroup_subsystem_iterator_next(param1, param2) privateOmrPortLibrary->sysinfo_cgroup_subsystem_iterator_next(privateOmrPortLibrary, param1, param2)
 #define omrsysinfo_cgroup_subsystem_iterator_destroy(param1) privateOmrPortLibrary->sysinfo_cgroup_subsystem_iterator_destroy(privateOmrPortLibrary, param1)
+#define omrsysinfo_get_process_start_time(param1) privateOmrPortLibrary->sysinfo_get_process_start_time(privateOmrPortLibrary, param1)
 #define omrintrospect_startup() privateOmrPortLibrary->introspect_startup(privateOmrPortLibrary)
 #define omrintrospect_shutdown() privateOmrPortLibrary->introspect_shutdown(privateOmrPortLibrary)
 #define omrintrospect_set_suspend_signal_offset(param1) privateOmrPortLibrary->introspect_set_suspend_signal_offset(privateOmrPortLibrary, param1)

port/common/omrport.c

@@ -335,6 +335,7 @@ static OMRPortLibrary MainPortLibraryTable = {
 	omrsysinfo_cgroup_subsystem_iterator_metricKey, /* sysinfo_cgroup_subsystem_iterator_metricKey */
 	omrsysinfo_cgroup_subsystem_iterator_next, /* sysinfo_cgroup_subsystem_iterator_next */
 	omrsysinfo_cgroup_subsystem_iterator_destroy, /* sysinfo_cgroup_subsystem_iterator_destroy */
+	omrsysinfo_get_process_start_time, /* sysinfo_get_process_start_time */
 	omrport_init_library, /* port_init_library */
 	omrport_startup_library, /* port_startup_library */
 	omrport_create_library, /* port_create_library */

port/common/omrsysinfo.c

@@ -1178,3 +1178,15 @@ omrsysinfo_cgroup_subsystem_iterator_destroy(struct OMRPortLibrary *portLibrary,
 {
 	return;
 }
+
+/**
+ * Get the process start time in ns precision epoch time.
+ * @param[in] portLibrary The port library.
+ * @param[in] pid The process id.
+ * @return 0 if the process does not exist, process start time in ns precision epoch time if the process exists.
+ */
+uint64_t
+omrsysinfo_get_process_start_time(struct OMRPortLibrary *portLibrary, uintptr_t pid)
+{
+	return 0;
+}

port/omrportpriv.h

@@ -661,6 +661,8 @@ extern J9_CFUNC int32_t
 omrsysinfo_cgroup_subsystem_iterator_next(struct OMRPortLibrary *portLibrary, struct OMRCgroupMetricIteratorState *state, struct OMRCgroupMetricElement *metricElement);
 extern J9_CFUNC void
 omrsysinfo_cgroup_subsystem_iterator_destroy(struct OMRPortLibrary *portLibrary, struct OMRCgroupMetricIteratorState *state);
+extern J9_CFUNC uint64_t
+omrsysinfo_get_process_start_time(struct OMRPortLibrary *portLibrary, uintptr_t pid);
 
 /* J9SourceJ9Signal*/
 extern J9_CFUNC int32_t

port/unix/omrsysinfo.c

@@ -80,6 +80,7 @@
 
 
 #if defined(J9ZOS390)
+#include "omrintrospect.h"
 #include "omrsimap.h"
 #endif /* defined(J9ZOS390) */
 
@@ -95,6 +96,7 @@
 
 #if defined(AIXPPC)
 #include <fcntl.h>
+#include <procinfo.h>
 #include <sys/procfs.h>
 #include <sys/systemcfg.h>
 #endif /* defined(AIXPPC) */
@@ -641,6 +643,25 @@ static int32_t retrieveOSXMemoryStats(struct OMRPortLibrary *portLibrary, struct
 static int32_t retrieveAIXMemoryStats(struct OMRPortLibrary *portLibrary, struct J9MemoryInfo *memInfo);
 #endif
 
+#if defined(LINUX) || defined(OSX) || defined(AIXPPC) || defined(J9ZOS390)
+#define NANOSECONDS_PER_SECOND 1000000000ULL
+#endif /* defined(LINUX) || defined(OSX) || defined(AIXPPC) || defined(J9ZOS390) */
+
+#if defined(LINUX)
+#define PROC_DIR_BUFFER_SIZE 256
+#define STAT_FAILURE -1
+#endif /* defined(LINUX) */
+
+#if defined(OSX)
+#define NUM_SYSCTL_ARGS 4
+#define SYSCTL_FAILURE -1
+#define NANOSECONDS_PER_MICROSECOND 1000ULL
+#endif /* defined(OSX) */
+
+#if defined(J9ZOS390)
+#define I32MAXVAL 0x7FFFFFFF
+#endif /* defined(J9ZOS390) */
+
 /**
  * @internal
  * Determines the proper portable error code to return given a native error code
@@ -7354,3 +7375,82 @@ get_Dispatch_IstreamCount(void) {
 	return (uintptr_t)numberOfIStreams;
 }
 #endif /* defined(OMRZTPF) */
+
+/**
+ * Get the process start time in ns precision epoch time.
+ * @param[in] portLibrary The port library.
+ * @param[in] pid The process id.
+ * @return 0 if the process does not exist, process start time in ns precision epoch time if the process exists.
+ */
+uint64_t
+omrsysinfo_get_process_start_time(struct OMRPortLibrary *portLibrary, uintptr_t pid)
+{
+	uint64_t processStartTimeInNanoseconds = 0;
+	if (omrsysinfo_process_exists(portLibrary, pid)) {
+#if defined(LINUX)
+		char procDir[PROC_DIR_BUFFER_SIZE] = {0};
+		struct stat st;
+		snprintf(procDir, sizeof(procDir), "/proc/%" PRIuPTR, pid);
+		if (stat(procDir, &st) == STAT_FAILURE) {
+			perror("stat");
+			goto done;
+		}
+		processStartTimeInNanoseconds = (uint64_t)st.st_mtime * NANOSECONDS_PER_SECOND + st.st_mtim.tv_nsec;
+#elif defined(OSX) /* defined(LINUX) */
+		int mib[NUM_SYSCTL_ARGS] = {CTL_KERN, KERN_PROC, KERN_PROC_PID, pid};
+		size_t len = sizeof(struct kinfo_proc);
+		struct kinfo_proc procInfo;
+		if (sysctl(mib, NUM_SYSCTL_ARGS, &procInfo, &len, NULL, 0) == SYSCTL_FAILURE) {
+			perror("sysctl");
+			goto done;
+		}
+		if (0 == len) {
+			perror("pid does not exist");
+			goto done;
+		}
+		processStartTimeInNanoseconds =
+			((uint64_t)procInfo.kp_proc.p_starttime.tv_sec * NANOSECONDS_PER_SECOND) +
+			((uint64_t)procInfo.kp_proc.p_starttime.tv_usec * NANOSECONDS_PER_MICROSECOND);
+#elif defined(AIXPPC) /* defined(OSX) */
+		pid_t convertedPid = (pid_t)pid;
+		struct procsinfo procInfos[] = {0};
+		int ret = getprocs(procInfos, sizeof(procInfos[0]), NULL, 0, &convertedPid, sizeof(procInfos) / sizeof(procInfos[0]));
+		if (-1 == ret) {
+			perror("getprocs");
+			goto done;
+		} else if (0 == ret) {
+			perror("pid does not exist");
+			goto done;
+		}
+		processStartTimeInNanoseconds = (uint64_t)(procInfos[0].pi_start) * NANOSECONDS_PER_SECOND;
+#elif defined(J9ZOS390) /* defined(AIXPPC) */
+		struct pgtha pgtha;
+		struct j9pg_thread_data threadData;
+		struct pgthc *pgthc = NULL;
+		unsigned int dataOffset = 0;
+		int inputSize = sizeof(struct pgtha);
+		struct pgtha *input = &pgtha;
+		int outputSize = sizeof(struct j9pg_thread_data);
+		unsigned char *output = (unsigned char *)&threadData;
+		int ret = 0;
+		int retCode = 0;
+		int reasonCode = 0;
+		memset(input, 0, sizeof(pgtha));
+		memset(output, 0, sizeof(threadData));
+		pgtha.pid = (pid_t)pid;
+		pgtha.accesspid = PGTHA_ACCESS_CURRENT;
+		pgtha.flag1 = PGTHA_FLAG_PROCESS_DATA;
+		getthent_os(&inputSize, &input, &outputSize, (void **)&output, &ret, &retCode, &reasonCode);
+		if (-1 == ret) {
+			fprintf(stderr, "getthent_os\n");
+			goto done;
+		}
+		dataOffset = *((unsigned int *)threadData.pgthb.offc);
+		dataOffset = (dataOffset & I32MAXVAL) >> 8;
+		pgthc = (struct pgthc *)(((char *)&threadData) + dataOffset);
+		processStartTimeInNanoseconds = (uint64_t)pgthc->starttime * NANOSECONDS_PER_SECOND;
+#endif /* defined(LINUX) */
+	}
+done:
+	return processStartTimeInNanoseconds;
+}

port/win32/omrsysinfo.c

@@ -46,6 +46,10 @@
 #include "ut_omrport.h"
 #include "omrsysinfo_helpers.h"
 
+#define WINDOWS_TICK 10000000ULL
+#define SEC_TO_UNIX_EPOCH 11644473600ULL
+#define NS100_PER_SEC 10000000ULL
+
 static int32_t copyEnvToBuffer(struct OMRPortLibrary *portLibrary, void *args);
 
 typedef struct CopyEnvToBufferArgs {
@@ -1990,3 +1994,34 @@ omrsysinfo_cgroup_subsystem_iterator_destroy(struct OMRPortLibrary *portLibrary,
 	return;
 }
 
+/**
+ * Get the process start time of a process in ns precision epoch time.
+ * @param[in] portLibrary The port library.
+ * @param[in] pid The process id.
+ * @return 0 if the process does not exist, process start time in ns precision epoch time if the process exists.
+ */
+uint64_t
+omrsysinfo_get_process_start_time(struct OMRPortLibrary *portLibrary, uintptr_t pid)
+{
+	uint64_t processStartTimeInNanoseconds = 0;
+	if (omrsysinfo_process_exists(portLibrary, pid)) {
+		HANDLE process = OpenProcess(PROCESS_QUERY_INFORMATION, FALSE, (DWORD)pid);
+		FILETIME createTime, exitTime, kernelTime, userTime;
+		double seconds = 0;
+		if (NULL == process) {
+			fprintf(stderr, "error opening process\n");
+			goto done;
+		}
+		if (!GetProcessTimes(process, &createTime, &exitTime, &kernelTime, &userTime)) {
+			fprintf(stderr, "error getting process times\n");
+			goto cleanup;
+		}
+		seconds = (double)(*(LONGLONG*)&(createTime)) / WINDOWS_TICK;
+		processStartTimeInNanoseconds = (uint64_t)((seconds - SEC_TO_UNIX_EPOCH) * NS100_PER_SEC);
+		processStartTimeInNanoseconds *= 100;
+cleanup:
+		CloseHandle(process);
+	}
+done:
+	return processStartTimeInNanoseconds;
+}

port/zos390/omrintrospect.h

@@ -34,10 +34,13 @@
 #include "omrutil.h"
 
 #pragma linkage(getthent, OS_UPSTACK)
+#pragma linkage(getthent_os, OS)
 #if defined(OMR_ENV_DATA64)
 #pragma map(getthent, "BPX4GTH")
+#pragma map(getthent_os, "BPX4GTH")
 #else
 #pragma map(getthent, "BPX1GTH")
+#pragma map(getthent_os, "BPX1GTH")
 #endif
 
 #pragma linkage(pthread_quiesce, OS_UPSTACK)
@@ -779,6 +782,14 @@ struct tcb {
 #define QUIESCE_SRB          9  /*  Quiesce threads type = SRBs      @DGA */
 /* Skip 10 and 11 due to collision with BPXZCONS Freeze/Unfreeze Fast */
 
+void getthent_os(int *inputSize, struct pgtha **input, int *outputSize, void **output, int *ret, int *retCode, int *reasonCode);
+
+struct j9pg_thread_data {
+	struct pgthb pgthb;
+	struct pgthj pgthj;
+	char padding[256];
+};
+
 #pragma pack(reset)
 
 #endif