Line data    Source code

       1             : /*
       2             :  * SPDX-License-Identifier: MPL-2.0
       3             :  *
       4             :  * This Source Code Form is subject to the terms of the Mozilla Public
       5             :  * License, v. 2.0.  If a copy of the MPL was not distributed with this
       6             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       7             :  *
       8             :  * Copyright 2024 MonetDB Foundation;
       9             :  * Copyright August 2008 - 2023 MonetDB B.V.;
      10             :  * Copyright 1997 - July 2008 CWI.
      11             :  */
      12             : 
      13             : /* (author) M. Kersten */
      14             : #include "monetdb_config.h"
      15             : #include "mal.h"
      16             : 
      17             : char monet_cwd[FILENAME_MAX] = { 0 };
      18             : 
      19             : char monet_characteristics[4096];
      20             : stream *maleventstream = 0;
      21             : 
      22             : /* The compile time debugging flags are turned into bit masks, akin to GDK */
      23             : lng MALdebug;
      24             : 
      25             : #include "mal_stack.h"
      26             : #include "mal_linker.h"
      27             : #include "mal_authorize.h"
      28             : #include "mal_session.h"
      29             : #include "mal_scenario.h"
      30             : #include "mal_parser.h"
      31             : #include "mal_interpreter.h"
      32             : #include "mal_namespace.h"            /* for initNamespace() */
      33             : #include "mal_profiler.h"
      34             : #include "mal_client.h"
      35             : #include "msabaoth.h"
      36             : #include "mal_dataflow.h"
      37             : #include "mal_private.h"
      38             : #include "mal_internal.h"
      39             : #include "mal_runtime.h"
      40             : #include "mal_resource.h"
      41             : #include "mal_atom.h"
      42             : #include "mutils.h"
      43             : 
      44             : MT_Lock mal_contextLock = MT_LOCK_INITIALIZER(mal_contextLock);
      45             : MT_Lock mal_profileLock = MT_LOCK_INITIALIZER(mal_profileLock);
      46             : MT_Lock mal_copyLock = MT_LOCK_INITIALIZER(mal_copyLock);
      47             : MT_Lock mal_delayLock = MT_LOCK_INITIALIZER(mal_delayLock);
      48             : 
      49             : 
      50             : const char *
      51         320 : mal_version(void)
      52             : {
      53         320 :         return MONETDB5_VERSION;
      54             : }
      55             : 
      56             : /*
      57             :  * Initialization of the MAL context
      58             :  */
      59             : 
      60             : int
      61         329 : mal_init(char *modules[], bool embedded, const char *initpasswd,
      62             :                  const char *caller_revision)
      63             : {
      64             : /* Any error encountered here terminates the process
      65             :  * with a message sent to stderr
      66             :  */
      67         329 :         str err;
      68             : 
      69         329 :         mal_startup();
      70             :         /* check that library that we're linked against is compatible with
      71             :          * the one we were compiled with */
      72         329 :         int maj, min, patch;
      73         329 :         const char *version = GDKlibversion();
      74         329 :         sscanf(version, "%d.%d.%d", &maj, &min, &patch);
      75         329 :         if (maj != GDK_VERSION_MAJOR || min < GDK_VERSION_MINOR) {
      76           0 :                 TRC_CRITICAL(MAL_SERVER,
      77             :                                          "Linked GDK library not compatible with the one this was compiled with\n");
      78           0 :                 TRC_CRITICAL(MAL_SERVER, "Linked version: %s, compiled version: %s\n",
      79             :                                          version, GDK_VERSION);
      80           0 :                 return -1;
      81             :         }
      82             : 
      83         329 :         if (caller_revision) {
      84         318 :                 const char *p = mercurial_revision();
      85         318 :                 if (p && strcmp(p, caller_revision) != 0) {
      86           0 :                         TRC_CRITICAL(MAL_SERVER,
      87             :                                                  "incompatible versions: caller is %s, MAL is %s\n",
      88             :                                                  caller_revision, p);
      89           0 :                         return -1;
      90             :                 }
      91             :         }
      92             : 
      93         329 :         if (!MCinit())
      94             :                 return -1;
      95         329 :         initNamespace();
      96             : 
      97         329 :         err = malBootstrap(modules, embedded, initpasswd);
      98         328 :         if (err != MAL_SUCCEED) {
      99           0 :                 mal_client_reset();
     100           0 :                 TRC_CRITICAL(MAL_SERVER, "%s\n", err);
     101           0 :                 freeException(err);
     102           0 :                 return -1;
     103             :         }
     104         328 :         initProfiler();
     105         328 :         initHeartbeat();
     106         328 :         return 0;
     107             : }
     108             : 
     109             : /*
     110             :  * Upon exit we should attempt to remove all allocated memory explicitly.
     111             :  * This seemingly superfluous action is necessary to simplify analysis of
     112             :  * memory leakage problems later on and to allow an embedded server to
     113             :  * restart the server properly.
     114             :  *
     115             :  * It is the responsibility of the enclosing application to finish/cease all
     116             :  * activity first.
     117             :  * This function should be called after you have issued sql_reset();
     118             :  */
     119             : void
     120         327 : mal_reset(void)
     121             : {
     122         327 :         GDKprepareExit();
     123         327 :         MCstopClients(0);
     124         327 :         setHeartbeat(-1);
     125         327 :         stopProfiler(0);
     126         327 :         AUTHreset();
     127         327 :         if (!GDKinmemory(0) && !GDKembedded()) {
     128         317 :                 str err = 0;
     129             : 
     130         317 :                 if ((err = msab_wildRetreat()) !=NULL) {
     131           0 :                         TRC_ERROR(MAL_SERVER, "%s\n", err);
     132           0 :                         free(err);
     133             :                 }
     134         317 :                 if ((err = msab_registerStop()) !=NULL) {
     135           0 :                         TRC_ERROR(MAL_SERVER, "%s\n", err);
     136           0 :                         free(err);
     137             :                 }
     138             :         }
     139         327 :         mal_dataflow_reset();
     140         327 :         mal_client_reset();
     141         327 :         mal_linker_reset();
     142         327 :         mal_resource_reset();
     143         327 :         mal_runtime_reset();
     144         327 :         mal_module_reset();
     145         327 :         mal_atom_reset();
     146             : 
     147         327 :         memset((char *) monet_cwd, 0, sizeof(monet_cwd));
     148         327 :         memset((char *) monet_characteristics, 0, sizeof(monet_characteristics));
     149         327 :         mal_namespace_reset();
     150             :         /* No need to clean up the namespace, it will simply be extended
     151             :          * upon restart mal_namespace_reset(); */
     152         327 :         GDKreset(0);                            // terminate all other threads
     153         327 : }
     154             : 
     155             : 
     156             : /* stopping clients should be done with care, as they may be in the mids of
     157             :  * transactions. One safe place is between MAL instructions, which would
     158             :  * abort the transaction by raising an exception. All sessions are
     159             :  * terminate this way.
     160             :  * We should also ensure that no new client enters the scene while shutting down.
     161             :  * For this we mark the client records as BLOCKCLIENT.
     162             :  */
     163             : 
     164             : void
     165         317 : mal_exit(int status)
     166             : {
     167         317 :         mal_reset();
     168         317 :         exit(status);                           /* properly end GDK */
     169             : }