shm

include/os/os.h

@@ -82,6 +82,7 @@ extern "C" {
 #include "osLz4.h"
 #include "osMath.h"
 #include "osMemory.h"
+#include "osProc.h"
 #include "osRand.h"
 #include "osThread.h"
 #include "osSemaphore.h"

include/os/osProc.h

@@ -0,0 +1,33 @@
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program 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.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _TD_OS_PROC_H_
+#define _TD_OS_PROC_H_
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// start a copy of itself
+int32_t taosNewProc(const char *args);
+
+// the length of the new name must be less than the original name to take effect
+void taosSetProcName(char **argv, const char *name);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /*_TD_OS_PROC_H_*/

include/os/osSignal.h

@@ -49,6 +49,8 @@ void taosSetSignal(int32_t signum, FSignalHandler sigfp);
 void taosIgnSignal(int32_t signum);
 void taosDflSignal(int32_t signum);
 
+void taosKillChildOnSelfStopped();
+
 #ifdef __cplusplus
 }
 #endif

source/dnode/mgmt/main/exe/dndMain.c

@@ -56,7 +56,7 @@ static void dndSetSignalHandle() {
     taosSetSignal(SIGCHLD, dndHandleChild);
   } else {
     // When the parent process exits, the child process will receive the SIGKILL signal
-    prctl(PR_SET_PDEATHSIG, SIGKILL);
+    taosKillChildOnSelfStopped();
   }
 }
 
@@ -143,8 +143,7 @@ static int32_t dndInitLog() {
 static void dndSetProcName(char **argv) {
   if (global.ntype != DNODE) {
     const char *name = dndNodeProcStr(global.ntype);
-    prctl(PR_SET_NAME, name);
+    taosSetProcName(argv, name);
-    strcpy(argv[0], name);
   }
 }
 

source/dnode/mgmt/main/inc/dnd.h

@@ -95,6 +95,7 @@ typedef struct SMgmtWrapper {
   bool        deployed;
   bool        required;
   EProcType   procType;
+  int32_t     procId;
   SProcObj   *pProc;
   SShm        shm;
   void       *pMgmt;

source/dnode/mgmt/main/src/dndExec.c

@@ -193,9 +193,17 @@ static int32_t dndRunInParentProcess(SDnode *pDnode) {
     if (!pWrapper->required) continue;
 
     if (pDnode->ntype == NODE_MAX) {
-      dInfo("node:%s, will be started manually", pWrapper->name);
+      dInfo("node:%s, should be started manually", pWrapper->name);
     } else {
-      dInfo("node:%s, will pull up the child process through exec", pWrapper->name);
+      char    args[PATH_MAX];
+      int32_t pid = taosNewProc(args);
+      if (pid <= 0) {
+        terrno = TAOS_SYSTEM_ERROR(errno);
+        dError("node:%s, failed to exec in new process since %s", pWrapper->name, terrstr());
+        return -1;
+      }
+      pWrapper->procId = pid;
+      dInfo("node:%s, run in new process, pid:%d", pWrapper->name, pid);
     }
 
     if (taosProcRun(pWrapper->pProc) != 0) {

source/os/src/osProc.c

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
+ *
+ * This program is free software: you can use, redistribute, and/or modify
+ * it under the terms of the GNU Affero General Public License, version 3
+ * or later ("AGPL"), as published by the Free Software Foundation.
+ *
+ * This program 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.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#define ALLOW_FORBID_FUNC
+#define _DEFAULT_SOURCE
+#include "os.h"
+
+int32_t taosNewProc(const char *args) {
+  return 0;
+}
+
+void taosSetProcName(char **argv, const char *name) {
+  prctl(PR_SET_NAME, name);
+  strcpy(argv[0], name);
+}

source/os/src/osSignal.c

@@ -71,4 +71,6 @@ void taosIgnSignal(int32_t signum) { signal(signum, SIG_IGN); }
 
 void taosDflSignal(int32_t signum) { signal(signum, SIG_DFL); }
 
+void taosKillChildOnSelfStopped() { prctl(PR_SET_PDEATHSIG, SIGKILL); }
+
 #endif

source/util/test/queueTest.cpp

@@ -26,108 +26,3 @@ class UtilTestQueue : public ::testing::Test {
   static void SetUpTestSuite() {}
   static void TearDownTestSuite() {}
 };
-
-#if 0
-TEST_F(UtilTestQueue, 01_fork) {
-  pid_t pid;
-  int   shmid;
-  int*  shmptr;
-  int*  tmp;
-
-  int                 err;
-  pthread_mutexattr_t mattr;
-  if ((err = taosThreadMutexAttrInit(&mattr)) < 0) {
-    printf("mutex addr init error:%s\n", strerror(err));
-    exit(1);
-  }
-
-  if ((err = taosThreadMutexAttrSetPshared(&mattr, PTHREAD_PROCESS_SHARED)) < 0) {
-    printf("mutex addr get shared error:%s\n", strerror(err));
-    exit(1);
-  }
-
-  pthread_mutex_t* m;
-  int              mid = shmget(IPC_PRIVATE, sizeof(pthread_mutex_t), 0600);
-  m = (pthread_mutex_t*)shmat(mid, NULL, 0);
-
-  if ((err = taosThreadMutexInit(m, &mattr)) < 0) {
-    printf("mutex mutex init error:%s\n", strerror(err));
-    exit(1);
-  }
-
-  if ((shmid = shmget(IPC_PRIVATE, 1000, IPC_CREAT | 0600)) < 0) {
-    perror("shmget error");
-    exit(1);
-  }
-
-  if ((shmptr = (int*)shmat(shmid, 0, 0)) == (void*)-1) {
-    perror("shmat error");
-    exit(1);
-  }
-
-  tmp = shmptr;
-
-  int   shmid2;
-  int** shmptr2;
-  if ((shmid2 = shmget(IPC_PRIVATE, 20, IPC_CREAT | 0600)) < 0) {
-    perror("shmget2 error");
-    exit(1);
-  }
-
-  if ((shmptr2 = (int**)shmat(shmid2, 0, 0)) == (void*)-1) {
-    perror("shmat2 error");
-    exit(1);
-  }
-
-  *shmptr2 = shmptr;
-
-  if ((pid = fork()) < 0) {
-    perror("fork error");
-    exit(1);
-  } else if (pid == 0) {
-    if ((err = taosThreadMutexLock(m)) < 0) {
-      printf("lock error:%s\n", strerror(err));
-      exit(1);
-    }
-    for (int i = 0; i < 30; ++i) {
-      **shmptr2 = i;
-      (*shmptr2)++;
-    }
-
-    if ((err = taosThreadMutexUnlock(m)) < 0) {
-      printf("unlock error:%s\n", strerror(err));
-      exit(1);
-    }
-    exit(0);
-
-  } else {
-    if ((err = taosThreadMutexLock(m)) < 0) {
-      printf("lock error:%s\n", strerror(err));
-      exit(1);
-    }
-    for (int i = 10; i < 42; ++i) {
-      **shmptr2 = i;
-      (*shmptr2)++;
-    }
-    if ((err = taosThreadMutexUnlock(m)) < 0) {
-      printf("unlock error:%s\n", strerror(err));
-      exit(1);
-    }
-  }
-
-  wait(NULL);
-
-  for (int i = 0; i < 70; ++i) {
-    printf("%d ", tmp[i]);
-  }
-
-  printf("\n");
-
-  taosThreadAttrDestroy(&mattr);
-  //销毁mutex
-  taosThreadMutexDestroy(m);
-
-  exit(0);
-}
-
-#endif