1647 lines
42 KiB
C
Executable File
1647 lines
42 KiB
C
Executable File
/*************************************************************************
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* *
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* YAP Prolog *
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* *
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* Yap Prolog was developed at NCCUP - Universidade do Porto *
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* *
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* Copyright L.Damas, V.S.Costa and Universidade do Porto 1985-1997 *
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* *
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**************************************************************************
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* *
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* File: save.c * Last
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*rev: * mods:
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** comments: saving and restoring a Prolog computation *
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* *
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*************************************************************************/
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#ifdef SCCS
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static char SccsId[] = "@(#)save.c 1.3 3/15/90";
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#endif
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#include "absmi.h"
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#include "alloc.h"
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#if _MSC_VER || defined(__MINGW32__)
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#if HAVE_WINSOCK2_H
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#include <winsock2.h>
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#endif
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#include <psapi.h>
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#include <windows.h>
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#endif
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#if USE_DL_MALLOC
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#include "dlmalloc.h"
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#endif
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#include "Foreign.h"
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#include "YapText.h"
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#include "sshift.h"
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#include "yapio.h"
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#if HAVE_STRING_H
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#include <string.h>
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#endif
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#if !HAVE_STRNCAT
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#define strncat(X, Y, Z) strcat(X, Y)
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#endif
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#if !HAVE_STRNCPY
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#define strncpy(X, Y, Z) strcpy(X, Y)
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#endif
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#if HAVE_FCNTL_H
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#include <fcntl.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#endif
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#endif
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#include "iopreds.h"
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/********* hack for accesing several kinds of terms. Should be cleaned **/
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static char end_msg[256] = "*** End of YAP saved state *****";
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/* SWI IO, must be restarted after restore */
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void initIO(void);
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#ifdef DEBUG
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/*
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*
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#FOR DEBUGGING define DEBUG_RESTORE0 to check the file stuff,
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#define DEBUG_RESTORE1 to see if it is able to prepare the chain,
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#define DEBUG_RESTORE2 to see how things are going,
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#define DEBUG_RESTORE3 to check if the atom chain is still a working chain,
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* define DEBUG_RESTORE4 if you want to set the output for some
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* particular file,
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* define DEBUG_RESTORE5 if you want to see how the stacks are being
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* cleaned up,
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* define DEBUG_RESTORE6 if you want to follow the execution in
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*
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* Also a file is defined where you can write things, by default stderr
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*
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* Good Luck
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*/
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#endif
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static int myread(FILE *, char *, Int);
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static Int mywrite(FILE *, char *, Int);
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static FILE *open_file(const char *, int);
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static int close_file(void);
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static Int putout(CELL);
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static Int putcellptr(CELL *);
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static CELL get_cell(void);
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static CELL *get_cellptr(/* CELL * */ void);
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static int put_info(int, int CACHE_TYPE);
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static int save_regs(int CACHE_TYPE);
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static int save_code_info(void);
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static int save_heap(void);
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static int save_stacks(int CACHE_TYPE);
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static int save_crc(void);
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static Int do_save(int CACHE_TYPE);
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static Int p_save2(CACHE_TYPE1);
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static Int p_save_program(CACHE_TYPE1);
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static int check_header(CELL *, CELL *, CELL *, CELL *CACHE_TYPE);
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static int get_heap_info(CACHE_TYPE1);
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static int get_regs(int CACHE_TYPE);
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static int get_insts(OPCODE[]);
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static int get_hash(void);
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static int CopyCode(CACHE_TYPE1);
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static int CopyStacks(CACHE_TYPE1);
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static int get_coded(int, OPCODE[] CACHE_TYPE);
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static void restore_codes(void);
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static void RestoreDB(DBEntry *CACHE_TYPE);
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static void RestoreDBTerm(DBTerm *, bool, int CACHE_TYPE);
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static void CleanClauses(yamop *First, yamop *Last, PredEntry *pp USES_REGS);
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static void rehash(CELL *, int, int CACHE_TYPE);
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static void CleanCode(PredEntry *CACHE_TYPE);
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static void RestoreEntries(PropEntry *, int CACHE_TYPE);
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static void RestoreFreeSpace(CACHE_TYPE1);
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static void restore_heap(void);
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#ifdef DEBUG_RESTORE3
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static void ShowAtoms(void);
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static void ShowEntries(PropEntry *);
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#endif
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static int OpenRestore(const char *, CELL *, CELL *, CELL *,
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CELL *, FILE **);
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static void CloseRestore(void);
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#ifndef _WIN32
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static int check_opcodes(OPCODE[]);
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#endif
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static void RestoreHeap(OPCODE[] CACHE_TYPE);
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static Int p_restore(CACHE_TYPE1);
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static void restore_heap_regs(CACHE_TYPE1);
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static void restore_regs(int CACHE_TYPE);
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#ifdef MACYAP
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static void NewFileInfo(long, long);
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extern int DefVol;
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#endif
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#ifdef _WIN32
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#if HAVE_IO_H
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#include <io.h>
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#endif
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#endif
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#ifdef LIGHT
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#include <strings.h>
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#include <unix.h>
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void LightBug(char *);
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static void LightBug(s) char *s;
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{}
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#endif /* LIGHT */
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static Int do_SYSTEM_ERROR_INTERNAL(yap_error_number etype, const char *msg) {
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CACHE_REGS
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char *buf = malloc(1043);
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#if HAVE_SNPRINTF
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#if HAVE_STRERROR
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snprintf(buf, 1043 - 1, "%s (%s when reading %s)", msg, strerror(errno),
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LOCAL_FileNameBuf);
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#else
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snprintf(buf, 1024 - 1, "%s, (system error %d when reading %s)", msg, errno,
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LOCAL_FileNameBuf);
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#endif
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#else
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#if HAVE_STRERROR
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snprintf(buf, 1024 - 1, "%s, (%s when reading %s)", msg, strerror(errno),
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LOCAL_FileNameBuf);
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#else
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snprintf(buf, 1024 - 1, "%s, (system error %d when reading %s)", msg, errno,
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LOCAL_FileNameBuf);
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#endif
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#endif
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LOCAL_Error_TYPE = etype;
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return -1;
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}
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inline static int myread(FILE *fd, char *buffer, Int len) {
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size_t nread;
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while (len > 0) {
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nread = fread(buffer, 1, (int)len, fd);
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if (nread < 1) {
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return do_SYSTEM_ERROR_INTERNAL(PERMISSION_ERROR_INPUT_PAST_END_OF_STREAM,
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"bad read on saved state");
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}
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buffer += nread;
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len -= nread;
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}
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return len;
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}
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inline static Int mywrite(FILE *fd, char *buff, Int len) {
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size_t nwritten;
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while (len > 0) {
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nwritten = fwrite(buff, 1, (size_t)len, fd);
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if ((long int)nwritten < 0) {
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return do_SYSTEM_ERROR_INTERNAL(SYSTEM_ERROR_INTERNAL,
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"bad write on saved state");
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}
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buff += nwritten;
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len -= nwritten;
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}
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return len;
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}
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#define FullSaved 1
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/* Where the code was before */
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typedef CELL *CELLPOINTER;
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static FILE *splfild = NULL;
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#ifdef DEBUG
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#ifdef DEBUG_RESTORE4
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static FILE *errout;
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#else
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#define errout GLOBAL_stderr
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#endif
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#endif /* DEBUG */
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static Int OldHeapUsed;
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static CELL which_save;
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/* Open a file to read or to write */
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static FILE *open_file(const char *my_file, int flag) {
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FILE *splfild;
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char flags[6];
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int i = 0;
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if (flag & O_RDONLY) {
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flags[i++] = 'r';
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}
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if (flag & O_CREAT) {
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flags[i++] = 'w';
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}
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if (flag & O_WRONLY) {
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flags[i++] = 'w';
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}
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if (flag & O_APPEND) {
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flags[i++] = 'a';
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}
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#if _WIN32
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if (flag & O_BINARY) {
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flags[i++] = 'b';
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}
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#endif
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flags[i] = '\0';
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splfild = fopen(my_file, flags);
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#ifdef undf0
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fprintf(errout, "Opened file %s\n", my_file);
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#endif
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return splfild;
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}
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static int close_file(void) {
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if (splfild == 0)
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return 0;
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if (fclose(splfild) < 0)
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return do_SYSTEM_ERROR_INTERNAL(SYSTEM_ERROR_INTERNAL,
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"bad close on saved state");
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splfild = 0;
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return 1;
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}
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/* stores a cell in a file */
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static Int putout(CELL l) { return mywrite(splfild, (char *)&l, sizeof(CELL)); }
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/* stores a pointer to a cell in a file */
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static Int putcellptr(CELL *l) {
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return mywrite(splfild, (char *)&l, sizeof(CELLPOINTER));
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}
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/* gets a cell from a file */
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static CELL get_cell(void) {
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CELL l;
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myread(splfild, (char *)&l, Unsigned(sizeof(CELL)));
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return (l);
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}
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/* gets a cell from a file */
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static CELL get_header_cell(void) {
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CELL l;
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size_t count = 0;
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int n;
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while (count < sizeof(CELL)) {
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if ((n = fread(&l, 1, sizeof(CELL) - count, splfild)) < 0) {
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do_SYSTEM_ERROR_INTERNAL(PERMISSION_ERROR_INPUT_PAST_END_OF_STREAM,
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"failed to read saved state header");
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return 0L;
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}
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count += n;
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}
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return l;
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}
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/* gets a pointer to cell from a file */
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static CELL *get_cellptr(void) {
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CELL *l;
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if (myread(splfild, (char *)&l, Unsigned(sizeof(CELLPOINTER))) < 0)
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return NULL;
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return (l);
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}
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/*
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* writes the header (at the moment YAPV*), info about what kind of saved
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* set, the work size, and the space ocuppied
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*/
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static int put_info(int info, int mode USES_REGS) {
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char msg[256 * 16];
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sprintf(msg,
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"#!/bin/sh\nexec_dir=${YAPBINDIR:-%s}\nexec $exec_dir/yap $0 "
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"\"$@\"\n%cYAP-%s",
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YAP_BINDIR, 1, YAP_FULL_VERSION);
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if (mywrite(splfild, msg, strlen(msg) + 1))
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return -1;
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if (putout(Unsigned(info)) < 0)
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return -1;
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/* say whether we just saved the heap or everything */
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if (putout(mode) < 0)
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return -1;
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/* current state of stacks, to be used by SavedInfo */
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/* space available in heap area */
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if (putout(Unsigned(LOCAL_GlobalBase) - Unsigned(Yap_HeapBase)) < 0)
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return -1;
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/* space available for stacks */
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if (putout(Unsigned(LOCAL_LocalBase) - Unsigned(LOCAL_GlobalBase)) < 0)
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return -1;
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/* space available for trail */
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if (putout(Unsigned(LOCAL_TrailTop) - Unsigned(LOCAL_TrailBase)) < 0)
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return -1;
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/* Space used in heap area */
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if (putout(Unsigned(HeapTop) - Unsigned(Yap_HeapBase)) < 0)
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return -1;
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/* Space used for local stack */
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if (putout(Unsigned(LCL0) - Unsigned(ASP)) < 0)
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return -1;
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/* Space used for global stack */
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if (putout(Unsigned(HR) - Unsigned(LOCAL_GlobalBase)) < 0)
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return -1;
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/* Space used for trail */
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if (putout(Unsigned(TR) - Unsigned(LOCAL_TrailBase)) < 0)
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return -1;
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return 0;
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}
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static int save_regs(int mode USES_REGS) {
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/* save all registers */
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if (putout((CELL)compile_arrays) < 0)
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return -1;
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if (mode == DO_EVERYTHING) {
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if (putcellptr((CELL *)CP) < 0)
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return -1;
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if (putcellptr(ENV) < 0)
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return -1;
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if (putcellptr(ASP) < 0)
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return -1;
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/* if (putout((CELL)N) < 0)
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return -1; */
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if (putcellptr(H0) < 0)
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return -1;
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if (putcellptr(LCL0) < 0)
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return -1;
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if (putcellptr(HR) < 0)
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return -1;
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if (putcellptr(HB) < 0)
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return -1;
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if (putcellptr((CELL *)B) < 0)
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return -1;
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if (putcellptr((CELL *)TR) < 0)
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return -1;
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if (putcellptr(YENV) < 0)
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return -1;
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if (putcellptr(S) < 0)
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return -1;
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if (putcellptr((CELL *)P) < 0)
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return -1;
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if (putout(CreepFlag) < 0)
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return -1;
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if (putout(EventFlag) < 0)
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return -1;
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#if defined(YAPOR_SBA) || defined(TABLING)
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if (putcellptr(H_FZ) < 0)
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return -1;
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if (putcellptr((CELL *)B_FZ) < 0)
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return -1;
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if (putcellptr((CELL *)TR_FZ) < 0)
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return -1;
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#endif /* YAPOR_SBA || TABLING */
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}
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if (putout(CurrentModule) < 0)
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return -1;
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if (mode == DO_EVERYTHING) {
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#ifdef COROUTINING
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if (putout(LOCAL_WokenGoals) < 0)
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return -1;
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#endif
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#ifdef DEPTH_LIMIT
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if (putout(DEPTH) < 0)
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return -1;
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#endif
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if (putout(LOCAL_GcGeneration) < 0)
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return -1;
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if (putout(LOCAL_GcPhase) < 0)
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return -1;
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if (putout(LOCAL_GcCurrentPhase) < 0)
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return -1;
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}
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/* The operand base */
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if (putcellptr(CellPtr(XREGS)) < 0)
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return -1;
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if (putout(which_save) < 0)
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return -1;
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/* Now start by saving the code */
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/* the heap boundaries */
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if (putcellptr(CellPtr(Yap_HeapBase)) < 0)
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return -1;
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if (putcellptr(CellPtr(HeapTop)) < 0)
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return -1;
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/* and the space it ocuppies */
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if (putout(Unsigned(HeapUsed)) < 0)
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return -1;
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/* Then the start of the free code */
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if (putcellptr(CellPtr(FreeBlocks)) < 0)
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return -1;
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if (putcellptr(CellPtr(AuxBase)) < 0)
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return -1;
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if (putcellptr(AuxSp) < 0)
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return -1;
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if (putcellptr(CellPtr(AuxTop)) < 0)
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return -1;
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if (putcellptr(CellPtr(LOCAL_ScratchPad.ptr)) < 0)
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return -1;
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if (putout(LOCAL_ScratchPad.sz) < 0)
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return -1;
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if (putout(LOCAL_ScratchPad.msz) < 0)
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return -1;
|
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if (mode == DO_EVERYTHING) {
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/* put the old trail base, just in case it moves again */
|
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if (putout(ARG1) < 0)
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return -1;
|
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if (which_save == 2) {
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if (putout(ARG2) < 0)
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return -1;
|
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}
|
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if (putcellptr(CellPtr(LOCAL_TrailBase)) < 0)
|
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return -1;
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}
|
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return 0;
|
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}
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|
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static int save_code_info(void) {
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|
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/* First the instructions */
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{
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op_numbers i;
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OPCODE my_ops[_std_top + 1];
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for (i = _Ystop; i <= _std_top; ++i)
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my_ops[i] = Yap_opcode(i);
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if (mywrite(splfild, (char *)my_ops, sizeof(OPCODE) * (_std_top + 1)) < 0)
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return -1;
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}
|
|
/* and the current character codes */
|
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if (mywrite(splfild, (char *)Yap_chtype,
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NUMBER_OF_CHARS * sizeof(char_kind_t)) < 0)
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return -1;
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return 0;
|
|
}
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|
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static int save_heap(void) {
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#ifdef USE_SYSTEM_MALLOC
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return -1;
|
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#endif
|
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int j;
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/* Then save the whole heap */
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Yap_ResetConsultStack();
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j = Unsigned(HeapTop) - Unsigned(Yap_HeapBase);
|
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/* store 10 more cells because of the memory manager */
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if (mywrite(splfild, (char *)Yap_HeapBase, j) < 0)
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return -1;
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return 0;
|
|
}
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|
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static int save_stacks(int mode USES_REGS) {
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int j;
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|
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switch (mode) {
|
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case DO_EVERYTHING:
|
|
/* Now, go and save the state */
|
|
/* Save the local stack */
|
|
j = Unsigned(LCL0) - Unsigned(ASP);
|
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if (mywrite(splfild, (char *)ASP, j) < 0)
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return -1;
|
|
/* Save the global stack */
|
|
j = Unsigned(HR) - Unsigned(LOCAL_GlobalBase);
|
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if (mywrite(splfild, (char *)LOCAL_GlobalBase, j) < 0)
|
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return -1;
|
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/* Save the trail */
|
|
j = Unsigned(TR) - Unsigned(LOCAL_TrailBase);
|
|
if (mywrite(splfild, (char *)LOCAL_TrailBase, j) < 0)
|
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return -1;
|
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break;
|
|
case DO_ONLY_CODE: {
|
|
tr_fr_ptr tr_ptr = TR;
|
|
while (tr_ptr != (tr_fr_ptr)LOCAL_TrailBase) {
|
|
CELL val = TrailTerm(tr_ptr - 1);
|
|
if (IsVarTerm(val)) {
|
|
CELL *d1 = VarOfTerm(val);
|
|
if (d1 < (CELL *)HeapTop) {
|
|
if (putout(val) < 0)
|
|
return -1;
|
|
}
|
|
} else if (IsPairTerm(val)) {
|
|
CELL *d1 = RepPair(val);
|
|
if (d1 < (CELL *)HeapTop) {
|
|
if (putout(val) < 0)
|
|
return -1;
|
|
}
|
|
}
|
|
tr_ptr--;
|
|
}
|
|
}
|
|
if (putcellptr(NULL) < 0)
|
|
return -1;
|
|
break;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int save_crc(void) {
|
|
/* Save a CRC */
|
|
return mywrite(splfild, end_msg, 256);
|
|
}
|
|
|
|
static Int do_save(int mode USES_REGS) {
|
|
Term t1 = Deref(ARG1);
|
|
|
|
if (Yap_HoleSize) {
|
|
Yap_Error(SYSTEM_ERROR_INTERNAL,
|
|
MkAtomTerm(Yap_LookupAtom(LOCAL_FileNameBuf)),
|
|
"restore/1: address space has holes of size %ld, cannot save",
|
|
(long int)Yap_HoleSize);
|
|
return FALSE;
|
|
}
|
|
if (!Yap_GetName(LOCAL_FileNameBuf, YAP_FILENAME_MAX, t1)) {
|
|
Yap_Error(TYPE_ERROR_LIST, t1, "save/1");
|
|
return FALSE;
|
|
}
|
|
Yap_CloseStreams();
|
|
if ((splfild = open_file(LOCAL_FileNameBuf, O_WRONLY | O_CREAT)) < 0) {
|
|
Yap_Error(SYSTEM_ERROR_INTERNAL,
|
|
MkAtomTerm(Yap_LookupAtom(LOCAL_FileNameBuf)),
|
|
"restore/1, open(%s)", strerror(errno));
|
|
return (FALSE);
|
|
}
|
|
if (put_info(FullSaved, mode PASS_REGS) < 0)
|
|
return -1;
|
|
if (save_regs(mode PASS_REGS) < 0)
|
|
return -1;
|
|
if (save_code_info() < 0)
|
|
return -1;
|
|
if (save_heap() < 0)
|
|
return -1;
|
|
if (save_stacks(mode PASS_REGS) < 0)
|
|
return -1;
|
|
if (save_crc() < 0)
|
|
return -1;
|
|
close_file();
|
|
return (TRUE);
|
|
}
|
|
|
|
/* Saves a complete prolog environment */
|
|
static Int p_save2(USES_REGS1) {
|
|
Int res;
|
|
yhandle_t CurSlot = Yap_StartSlots();
|
|
|
|
Term t;
|
|
#ifdef YAPOR
|
|
if (GLOBAL_number_workers != 1) {
|
|
Yap_Error(SYSTEM_ERROR_INTERNAL, TermNil,
|
|
"cannot perform save: more than a worker/thread running");
|
|
return (FALSE);
|
|
}
|
|
#endif /* YAPOR */
|
|
#ifdef THREADS
|
|
if (GLOBAL_NOfThreads != 1) {
|
|
Yap_Error(SYSTEM_ERROR_INTERNAL, TermNil,
|
|
"cannot perform save: more than a worker/thread running");
|
|
return (FALSE);
|
|
}
|
|
#endif /* THREADS */
|
|
/* avoid double saves */
|
|
if (IsNonVarTerm(t = Deref(ARG2)))
|
|
return TRUE;
|
|
if (!Yap_unify(ARG2, MkIntTerm(1)))
|
|
return FALSE;
|
|
which_save = 2;
|
|
CurSlot = Yap_StartSlots();
|
|
res = do_save(DO_EVERYTHING PASS_REGS);
|
|
Yap_CloseSlots(CurSlot);
|
|
return res;
|
|
}
|
|
|
|
/* Just save the program, not the stacks */
|
|
static Int p_save_program(USES_REGS1) {
|
|
which_save = 0;
|
|
return do_save(DO_ONLY_CODE PASS_REGS);
|
|
}
|
|
|
|
/* Now, to restore the saved code */
|
|
|
|
/* First check out if we are dealing with a valid file */
|
|
static int check_header(CELL *info, CELL *ATrail, CELL *AStack,
|
|
CELL *AHeap USES_REGS) {
|
|
char pp[256];
|
|
char msg[256];
|
|
CELL hp_size, gb_size, lc_size, tr_size, mode;
|
|
int n;
|
|
|
|
/* make sure we always check if there are enough bytes */
|
|
/* skip the first line */
|
|
pp[0] = '\0';
|
|
do {
|
|
if ((n = fread(pp, 1, 1, splfild)) <= 0) {
|
|
do_SYSTEM_ERROR_INTERNAL(PERMISSION_ERROR_INPUT_PAST_END_OF_STREAM,
|
|
"failed to scan first line from saved state");
|
|
return FAIL_RESTORE;
|
|
}
|
|
} while (pp[0] != 1);
|
|
/* now check the version */
|
|
sprintf(msg, "YAP-%s", YAP_FULL_VERSION);
|
|
{
|
|
int count = 0, n, to_read = Unsigned(strlen(msg) + 1);
|
|
while (count < to_read) {
|
|
if ((n = fread(pp, 1, to_read - count, splfild)) <= 0) {
|
|
do_SYSTEM_ERROR_INTERNAL(
|
|
PERMISSION_ERROR_INPUT_PAST_END_OF_STREAM,
|
|
"failed to scan version info from saved state");
|
|
return FAIL_RESTORE;
|
|
}
|
|
count += n;
|
|
}
|
|
}
|
|
if (strcmp(pp, msg) != 0) {
|
|
strncpy(LOCAL_ErrorMessage, "saved state ", MAX_ERROR_MSG_SIZE - 1);
|
|
strncat(LOCAL_ErrorMessage, LOCAL_FileNameBuf, MAX_ERROR_MSG_SIZE - 1);
|
|
strncat(LOCAL_ErrorMessage, " failed to match version ID",
|
|
MAX_ERROR_MSG_SIZE - 1);
|
|
LOCAL_Error_TYPE = SYSTEM_ERROR_SAVED_STATE;
|
|
return FAIL_RESTORE;
|
|
}
|
|
/* check info on header */
|
|
/* ignore info on saved state */
|
|
*info = get_header_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return FAIL_RESTORE;
|
|
/* check the restore mode */
|
|
mode = get_header_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return FAIL_RESTORE;
|
|
if (mode != DO_EVERYTHING && mode != DO_ONLY_CODE) {
|
|
return FAIL_RESTORE;
|
|
}
|
|
/* ignore info on stacks size */
|
|
*AHeap = get_header_cell();
|
|
if (LOCAL_ErrorMessage) {
|
|
return FAIL_RESTORE;
|
|
}
|
|
*AStack = get_header_cell();
|
|
if (LOCAL_ErrorMessage) {
|
|
return FAIL_RESTORE;
|
|
}
|
|
*ATrail = get_header_cell();
|
|
if (LOCAL_ErrorMessage) {
|
|
return FAIL_RESTORE;
|
|
}
|
|
/* now, check whether we got enough enough space to load the
|
|
saved space */
|
|
hp_size = get_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return FAIL_RESTORE;
|
|
while (Yap_HeapBase != NULL &&
|
|
hp_size > Unsigned(HeapLim) - Unsigned(Yap_HeapBase)) {
|
|
if (!Yap_growheap(FALSE, hp_size, NULL)) {
|
|
return FAIL_RESTORE;
|
|
}
|
|
}
|
|
if (mode == DO_EVERYTHING) {
|
|
lc_size = get_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return FAIL_RESTORE;
|
|
gb_size = get_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return FAIL_RESTORE;
|
|
if (Yap_HeapBase != NULL &&
|
|
lc_size + gb_size >
|
|
Unsigned(LOCAL_LocalBase) - Unsigned(LOCAL_GlobalBase)) {
|
|
if (LOCAL_ErrorMessage != NULL)
|
|
LOCAL_ErrorMessage = "could not allocate enough stack space";
|
|
return FAIL_RESTORE;
|
|
}
|
|
if (Yap_HeapBase != NULL &&
|
|
(tr_size = get_cell()) >
|
|
Unsigned(LOCAL_TrailTop) - Unsigned(LOCAL_TrailBase)) {
|
|
if (LOCAL_ErrorMessage != NULL)
|
|
LOCAL_ErrorMessage = "could not allocate enough trail space";
|
|
return FAIL_RESTORE;
|
|
}
|
|
} else {
|
|
/* skip cell size */
|
|
get_header_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return FAIL_RESTORE;
|
|
get_header_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return FAIL_RESTORE;
|
|
get_header_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return FAIL_RESTORE;
|
|
}
|
|
return (mode);
|
|
}
|
|
|
|
/* Gets the state of the heap, and evaluates the related variables */
|
|
static int get_heap_info(USES_REGS1) {
|
|
LOCAL_OldHeapBase = (ADDR)get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
LOCAL_OldHeapTop = (ADDR)get_cellptr();
|
|
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
OldHeapUsed = (Int)get_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
FreeBlocks = (BlockHeader *)get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
AuxBase = (ADDR)get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
AuxSp = get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
AuxTop = (ADDR)get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
LOCAL_ScratchPad.ptr = (ADDR)get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
LOCAL_ScratchPad.sz = get_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
LOCAL_ScratchPad.msz = get_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
LOCAL_HDiff = Unsigned(Yap_HeapBase) - Unsigned(LOCAL_OldHeapBase);
|
|
return 1;
|
|
}
|
|
|
|
/* Gets the register array */
|
|
/* Saves the old bases for the work areas */
|
|
/* and evaluates the difference from the old areas to the new ones */
|
|
static int get_regs(int flag USES_REGS) {
|
|
CELL *NewGlobalBase = (CELL *)LOCAL_GlobalBase;
|
|
CELL *NewLCL0 = LCL0;
|
|
CELL *OldXREGS;
|
|
|
|
/* Get regs */
|
|
compile_arrays = (int)get_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
if (flag == DO_EVERYTHING) {
|
|
CP = (yamop *)get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
ENV = get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
ASP = get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
/* N = get_cell(); */
|
|
H0 = get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
LCL0 = get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
HR = get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
HB = get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
B = (choiceptr)get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
TR = (tr_fr_ptr)get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
YENV = get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
S = get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
P = (yamop *)get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
CreepFlag = get_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
EventFlag = get_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
#if defined(YAPOR_SBA) || defined(TABLING)
|
|
H_FZ = get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
B_FZ = (choiceptr)get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
TR_FZ = (tr_fr_ptr)get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
#endif /* YAPOR_SBA || TABLING */
|
|
}
|
|
CurrentModule = get_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
if (flag == DO_EVERYTHING) {
|
|
#ifdef COROUTINING
|
|
LOCAL_WokenGoals = get_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
#endif
|
|
#ifdef DEPTH_LIMIT
|
|
DEPTH = get_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
#endif
|
|
LOCAL_GcGeneration = get_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
LOCAL_GcPhase = get_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
LOCAL_GcCurrentPhase = get_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
}
|
|
/* Get the old bases */
|
|
OldXREGS = get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
which_save = get_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
LOCAL_XDiff = (CELL)XREGS - (CELL)OldXREGS;
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
if (get_heap_info(PASS_REGS1) < 0)
|
|
return -1;
|
|
if (flag == DO_EVERYTHING) {
|
|
ARG1 = get_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
if (which_save == 2) {
|
|
ARG2 = get_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
}
|
|
/* get old trail base */
|
|
LOCAL_OldTrailBase = (ADDR)get_cellptr();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
/* Save the old register where we can easily access them */
|
|
LOCAL_OldASP = ASP;
|
|
LOCAL_OldLCL0 = LCL0;
|
|
LOCAL_OldGlobalBase = (CELL *)LOCAL_GlobalBase;
|
|
LOCAL_OldH = HR;
|
|
LOCAL_OldTR = TR;
|
|
LOCAL_GDiff = Unsigned(NewGlobalBase) - Unsigned(LOCAL_GlobalBase);
|
|
LOCAL_GDiff0 = 0;
|
|
LOCAL_LDiff = Unsigned(NewLCL0) - Unsigned(LCL0);
|
|
LOCAL_TrDiff = LOCAL_LDiff;
|
|
LOCAL_GlobalBase = (ADDR)NewGlobalBase;
|
|
LCL0 = NewLCL0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* Get the old opcodes and place them in a hash table */
|
|
static int get_insts(OPCODE old_ops[]) {
|
|
return myread(splfild, (char *)old_ops, sizeof(OPCODE) * (_std_top + 1));
|
|
}
|
|
|
|
/* Get the old atoms hash table */
|
|
static int get_hash(void) {
|
|
return myread(splfild, (char *)Yap_chtype,
|
|
NUMBER_OF_CHARS * sizeof(char_kind_t));
|
|
}
|
|
|
|
/* Copy all of the old code to the new Heap */
|
|
static int CopyCode(USES_REGS1) {
|
|
if (myread(splfild, (char *)Yap_HeapBase,
|
|
(Unsigned(LOCAL_OldHeapTop) - Unsigned(LOCAL_OldHeapBase))) < 0) {
|
|
return -1;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* Copy the local and global stack and also the trail to their new home */
|
|
/* In REGS we still have nonadjusted values !! */
|
|
static int CopyStacks(USES_REGS1) {
|
|
Int j;
|
|
char *NewASP;
|
|
|
|
j = Unsigned(LOCAL_OldLCL0) - Unsigned(ASP);
|
|
NewASP = (char *)(Unsigned(ASP) + (Unsigned(LCL0) - Unsigned(LOCAL_OldLCL0)));
|
|
if (myread(splfild, (char *)NewASP, j) < 0)
|
|
return -1;
|
|
j = Unsigned(HR) - Unsigned(LOCAL_OldGlobalBase);
|
|
if (myread(splfild, (char *)LOCAL_GlobalBase, j) < 0)
|
|
return -1;
|
|
j = Unsigned(TR) - Unsigned(LOCAL_OldTrailBase);
|
|
if (myread(splfild, LOCAL_TrailBase, j))
|
|
return -1;
|
|
return 1;
|
|
}
|
|
|
|
/* Copy the local and global stack and also the trail to their new home */
|
|
/* In REGS we still have nonadjusted values !! */
|
|
static int CopyTrailEntries(USES_REGS1) {
|
|
CELL entry, *Entries;
|
|
|
|
Entries = (CELL *)LOCAL_TrailBase;
|
|
do {
|
|
*Entries++ = entry = get_cell();
|
|
if (LOCAL_ErrorMessage)
|
|
return -1;
|
|
} while ((CODEADDR)entry != NULL);
|
|
return 1;
|
|
}
|
|
|
|
/* get things which are saved in the file */
|
|
static int get_coded(int flag, OPCODE old_ops[] USES_REGS) {
|
|
char my_end_msg[256];
|
|
|
|
if (get_regs(flag PASS_REGS) < 0)
|
|
return -1;
|
|
if (get_insts(old_ops) < 0)
|
|
return -1;
|
|
if (get_hash() < 0)
|
|
return -1;
|
|
if (CopyCode(PASS_REGS1) < 0)
|
|
return -1;
|
|
switch (flag) {
|
|
case DO_EVERYTHING:
|
|
if (CopyStacks(PASS_REGS1) < 0)
|
|
return -1;
|
|
break;
|
|
case DO_ONLY_CODE:
|
|
if (CopyTrailEntries(PASS_REGS1) < 0)
|
|
return -1;
|
|
break;
|
|
}
|
|
/* Check CRC */
|
|
if (myread(splfild, my_end_msg, 256) < 0)
|
|
return -1;
|
|
if (strcmp(end_msg, my_end_msg) != 0) {
|
|
LOCAL_ErrorMessage = "bad trailing CRC in saved state";
|
|
return -1;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/* restore some heap registers */
|
|
static void restore_heap_regs(USES_REGS1) {
|
|
if (HeapTop) {
|
|
HeapTop = AddrAdjust(HeapTop);
|
|
*((YAP_SEG_SIZE *)HeapTop) = InUseFlag;
|
|
}
|
|
// HeapMax = HeapUsed = OldHeapUsed;
|
|
HeapLim = LOCAL_GlobalBase;
|
|
}
|
|
|
|
/* adjust abstract machine registers */
|
|
static void restore_regs(int flag USES_REGS) {
|
|
restore_heap_regs(PASS_REGS1);
|
|
if (CurrentModule) {
|
|
CurrentModule = AtomTermAdjust(CurrentModule);
|
|
;
|
|
}
|
|
if (flag == DO_EVERYTHING) {
|
|
CP = PtoOpAdjust(CP);
|
|
ENV = PtoLocAdjust(ENV);
|
|
ASP = PtoLocAdjust(ASP);
|
|
HR = PtoGloAdjust(HR);
|
|
B = (choiceptr)PtoLocAdjust(CellPtr(B));
|
|
TR = PtoTRAdjust(TR);
|
|
P = PtoOpAdjust(P);
|
|
HB = PtoLocAdjust(HB);
|
|
YENV = PtoLocAdjust(YENV);
|
|
S = PtoGloAdjust(S);
|
|
LOCAL_WokenGoals = AbsAppl(PtoGloAdjust(RepAppl(LOCAL_WokenGoals)));
|
|
}
|
|
}
|
|
|
|
static void recompute_mask(DBRef dbr) {
|
|
if (dbr->Flags & DBNoVars) {
|
|
dbr->Mask = Yap_EvalMasks((Term)dbr->DBT.Entry, &(dbr->Key));
|
|
} else if (dbr->Flags & DBComplex) {
|
|
/* This is quite nasty, we want to recalculate the mask but
|
|
we don't want to rebuild the whole term. We'll just build whatever we
|
|
need to recompute the mask.
|
|
*/
|
|
CELL *x = (CELL *)HeapTop, *tp;
|
|
unsigned int Arity, i;
|
|
Term out;
|
|
char *tbase = CharP(dbr->DBT.Contents - 1);
|
|
|
|
if (IsPairTerm(dbr->DBT.Entry)) {
|
|
|
|
out = AbsPair(x);
|
|
Arity = 2;
|
|
tp = (CELL *)(tbase + (CELL)RepPair(dbr->DBT.Entry));
|
|
} else {
|
|
Functor f;
|
|
|
|
tp = (CELL *)(tbase + (CELL)RepAppl(dbr->DBT.Entry));
|
|
f = (Functor)(*tp++);
|
|
out = AbsAppl(x);
|
|
Arity = ArityOfFunctor(f);
|
|
*x++ = (CELL)f;
|
|
if (Arity > 3)
|
|
Arity = 3;
|
|
}
|
|
for (i = 0; i < Arity; i++) {
|
|
register Term tw = *tp++;
|
|
if (IsVarTerm(tw)) {
|
|
RESET_VARIABLE(x);
|
|
} else if (IsApplTerm(tw)) {
|
|
/* just fetch the functor from where it is in the data-base.
|
|
This guarantees we have access to references and friends. */
|
|
CELL offset = (CELL)RepAppl(tw);
|
|
if (offset > dbr->DBT.NOfCells * sizeof(CELL))
|
|
*x = tw;
|
|
else
|
|
*x = AbsAppl((CELL *)(tbase + offset));
|
|
} else if (IsAtomicTerm(tw)) {
|
|
*x = tw;
|
|
} else if (IsPairTerm(tw)) {
|
|
*x = AbsPair(x);
|
|
}
|
|
x++;
|
|
}
|
|
dbr->Mask = Yap_EvalMasks(out, &(dbr->Key));
|
|
}
|
|
}
|
|
|
|
#define HASH_SHIFT 6
|
|
|
|
/*
|
|
* This is used to make an hash table correct, after displacing its elements,
|
|
* HCEnd should point to an area of free space, usually in the heap. The
|
|
* routine is very dependent on the hash function used, and it destroys the
|
|
* previous "hit" order
|
|
*/
|
|
static void rehash(CELL *oldcode, int NOfE, int KindOfEntries USES_REGS) {
|
|
register CELL *savep, *basep;
|
|
CELL *oldp = oldcode;
|
|
int TableSize = NOfE - 1, NOfEntries;
|
|
register int i;
|
|
int hash;
|
|
CELL WorkTerm, failplace = 0;
|
|
CELL *Base = oldcode;
|
|
|
|
if (LOCAL_HDiff == 0)
|
|
return;
|
|
basep = HR;
|
|
if (HR + (NOfE * 2) > ASP) {
|
|
basep = (CELL *)TR;
|
|
if (basep + (NOfE * 2) > (CELL *)LOCAL_TrailTop) {
|
|
if (!Yap_growtrail((ADDR)(basep + (NOfE * 2)) - LOCAL_TrailTop, TRUE)) {
|
|
Yap_Error(RESOURCE_ERROR_TRAIL, TermNil,
|
|
"not enough space to restore hash tables for indexing");
|
|
Yap_exit(1);
|
|
}
|
|
}
|
|
}
|
|
for (i = 0; i < NOfE; ++i) {
|
|
if (*oldp == 0) {
|
|
failplace = oldp[1];
|
|
break;
|
|
}
|
|
oldp += 2;
|
|
}
|
|
savep = basep;
|
|
oldp = oldcode;
|
|
for (i = 0; i < NOfE; ++i) {
|
|
if (*oldp != 0) {
|
|
savep[0] = oldp[0];
|
|
savep[1] = oldp[1];
|
|
oldp[0] = 0;
|
|
oldp[1] = failplace;
|
|
savep += 2;
|
|
}
|
|
oldp += 2;
|
|
}
|
|
NOfEntries = (savep - basep) / 2;
|
|
savep = basep;
|
|
for (i = 0; i < NOfEntries; ++i) {
|
|
register Int d;
|
|
CELL *hentry;
|
|
|
|
WorkTerm = savep[i * 2];
|
|
hash = (Unsigned(WorkTerm) >> HASH_SHIFT) & TableSize;
|
|
hentry = Base + hash * 2;
|
|
d = TableSize & (Unsigned(WorkTerm) | 1);
|
|
while (*hentry) {
|
|
#ifdef DEBUG
|
|
#ifdef CLASHES
|
|
++clashes;
|
|
#endif /* CLASHES */
|
|
#endif /* DEBUG */
|
|
hash = (hash + d) & TableSize;
|
|
hentry = Base + hash * 2;
|
|
}
|
|
hentry[0] = WorkTerm;
|
|
hentry[1] = savep[i * 2 + 1];
|
|
}
|
|
}
|
|
|
|
static void RestoreFlags(UInt NFlags) {}
|
|
|
|
#include "rheap.h"
|
|
|
|
/* restore the atom entries which are invisible for the user */
|
|
static void RestoreIOStructures(void) { Yap_InitStdStreams(); }
|
|
|
|
static void RestoreFreeSpace(USES_REGS1) {
|
|
#if USE_DL_MALLOC
|
|
Yap_av = (struct malloc_state *)AddrAdjust((ADDR)Yap_av);
|
|
Yap_RestoreDLMalloc();
|
|
if (AuxSp != NULL) {
|
|
if (AuxBase < LOCAL_OldHeapBase || AuxBase > LOCAL_OldHeapTop) {
|
|
AuxSp = NULL;
|
|
AuxBase = NULL;
|
|
AuxTop = NULL;
|
|
} else {
|
|
AuxSp = PtoHeapCellAdjust(AuxSp);
|
|
AuxBase = AddrAdjust(AuxBase);
|
|
AuxTop = AddrAdjust(AuxTop);
|
|
LOCAL_ScratchPad.ptr = AddrAdjust(LOCAL_ScratchPad.ptr);
|
|
}
|
|
}
|
|
#else
|
|
/* restores the list of free space, with its curious structure */
|
|
BlockHeader *bpt, *bsz;
|
|
|
|
if (FreeBlocks != NULL)
|
|
FreeBlocks = BlockAdjust(FreeBlocks);
|
|
bpt = FreeBlocks;
|
|
if (AuxSp != NULL)
|
|
AuxSp = CellPtoHeapAdjust(AuxSp);
|
|
if (AuxTop != NULL)
|
|
AuxTop = AddrAdjust(AuxTop);
|
|
while (bpt != NULL) {
|
|
if (bpt->b_next != NULL) {
|
|
bsz = bpt->b_next = BlockAdjust(bpt->b_next);
|
|
while (bsz != NULL) {
|
|
if (bsz->b_next_size != NULL)
|
|
bsz->b_next_size = BlockAdjust(bsz->b_next_size);
|
|
if (bsz->b_next != NULL)
|
|
bsz->b_next = BlockAdjust(bsz->b_next);
|
|
bsz = bsz->b_next;
|
|
}
|
|
}
|
|
if (bpt->b_next_size != NULL)
|
|
bpt->b_next_size = BlockAdjust(bpt->b_next_size);
|
|
bpt = bpt->b_next_size;
|
|
}
|
|
*((YAP_SEG_SIZE *)HeapTop) = InUseFlag;
|
|
#endif
|
|
}
|
|
|
|
static void RestoreAtomList(Atom atm USES_REGS) {
|
|
AtomEntry *at;
|
|
|
|
at = RepAtom(atm);
|
|
if (EndOfPAEntr(at))
|
|
return;
|
|
do {
|
|
RestoreAtom(at PASS_REGS);
|
|
at = RepAtom(at->NextOfAE);
|
|
} while (!EndOfPAEntr(at));
|
|
}
|
|
|
|
static void RestoreHashPreds(USES_REGS1) {
|
|
UInt size = PredHashTableSize;
|
|
bool malloced = FALSE;
|
|
PredEntry **np;
|
|
UInt i;
|
|
PredEntry **oldp = PredHash;
|
|
|
|
np = (PredEntry **)Yap_AllocAtomSpace(sizeof(PredEntry *) * size);
|
|
if (!np) {
|
|
if (!(np = (PredEntry **)malloc(sizeof(PredEntry *) * size))) {
|
|
Yap_Error(SYSTEM_ERROR_FATAL, TermNil,
|
|
"Could not allocate space for pred table");
|
|
return;
|
|
}
|
|
malloced = TRUE;
|
|
}
|
|
for (i = 0; i < size; i++) {
|
|
np[i] = NULL;
|
|
}
|
|
for (i = 0; i < PredHashTableSize; i++) {
|
|
PredEntry *p = oldp[i];
|
|
|
|
if (p)
|
|
p = PredEntryAdjust(p);
|
|
while (p) {
|
|
Prop nextp;
|
|
UInt hsh;
|
|
|
|
if (p->NextOfPE)
|
|
p->NextOfPE = PropAdjust(p->NextOfPE);
|
|
nextp = p->NextOfPE;
|
|
CleanCode(p PASS_REGS);
|
|
hsh = PRED_HASH(p->FunctorOfPred, p->ModuleOfPred, size);
|
|
p->NextOfPE = AbsPredProp(np[hsh]);
|
|
np[hsh] = p;
|
|
p = RepPredProp(nextp);
|
|
}
|
|
}
|
|
for (i = 0; i < size; i++) {
|
|
PredHash[i] = np[i];
|
|
}
|
|
if (malloced)
|
|
free((ADDR)np);
|
|
else
|
|
Yap_FreeAtomSpace((ADDR)np);
|
|
}
|
|
|
|
/*
|
|
* This is the really tough part, to restore the whole of the heap
|
|
*/
|
|
static void restore_heap(void) {
|
|
restore_codes();
|
|
RestoreIOStructures();
|
|
}
|
|
|
|
#ifdef DEBUG_RESTORE3
|
|
static void ShowEntries(pp) PropEntry *pp;
|
|
{
|
|
while (!EndOfPAEntr(pp)) {
|
|
fprintf(GLOBAL_stderr, "Estou a ver a prop %x em %x\n", pp->KindOfPE, pp);
|
|
pp = RepProp(pp->NextOfPE);
|
|
}
|
|
}
|
|
|
|
static void ShowAtoms() {
|
|
AtomHashEntry *HashPtr = HashChain;
|
|
register int i;
|
|
for (i = 0; i < AtomHashTableSize; ++i) {
|
|
if (HashPtr->Entry != NIL) {
|
|
AtomEntry *at;
|
|
at = RepAtom(HashPtr->Entry);
|
|
do {
|
|
fprintf(GLOBAL_stderr, "Passei ao %s em %x\n", at->StrOfAE, at);
|
|
ShowEntries(RepProp(at->PropsOfAE));
|
|
} while (!EndOfPAEntr(at = RepAtom(at->NextOfAE)));
|
|
}
|
|
HashPtr++;
|
|
}
|
|
HashPtr = WideHashChain;
|
|
for (i = 0; i < WideAtomHashTableSize; ++i) {
|
|
if (HashPtr->Entry != NIL) {
|
|
AtomEntry *at;
|
|
at = RepAtom(HashPtr->Entry);
|
|
do {
|
|
fprintf(GLOBAL_stderr, "Passei ao %s em %x\n", at->StrOfAE, at);
|
|
ShowEntries(RepProp(at->PropsOfAE));
|
|
} while (!EndOfPAEntr(at = RepAtom(at->NextOfAE)));
|
|
}
|
|
HashPtr++;
|
|
}
|
|
}
|
|
|
|
#endif /* DEBUG_RESTORE3 */
|
|
|
|
#include <stdio.h>
|
|
|
|
static int commit_to_saved_state(const char *s, CELL *Astate, CELL *ATrail,
|
|
CELL *AStack, CELL *AHeap) {
|
|
CACHE_REGS
|
|
int mode;
|
|
char tmp[YAP_FILENAME_MAX+1];
|
|
|
|
if ((mode = check_header(Astate, ATrail, AStack, AHeap PASS_REGS)) ==
|
|
FAIL_RESTORE)
|
|
return (FAIL_RESTORE);
|
|
LOCAL_PrologMode = BootMode;
|
|
if (Yap_HeapBase) {
|
|
if (falseGlobalPrologFlag(HALT_AFTER_CONSULT_FLAG) && !silentMode()) {
|
|
strcpy(tmp, Yap_AbsoluteFile(s, true));
|
|
fprintf(stderr, "%% Restoring file %s\n", tmp);
|
|
}
|
|
Yap_CloseStreams();
|
|
}
|
|
#ifdef DEBUG_RESTORE4
|
|
/*
|
|
* This should be another file, like the log file
|
|
*/
|
|
errout = GLOBAL_stderr;
|
|
#endif
|
|
return mode;
|
|
}
|
|
|
|
static int try_open(const char *inpf, CELL *Astate, CELL *ATrail, CELL *AStack,
|
|
CELL *AHeap, FILE **streamp) {
|
|
int mode;
|
|
|
|
if (streamp) {
|
|
if ((*streamp = fopen(inpf, "rb"))) {
|
|
return DO_ONLY_CODE;
|
|
}
|
|
return FAIL_RESTORE;
|
|
}
|
|
if ((splfild = open_file(inpf, O_RDONLY)) < 0) {
|
|
return FAIL_RESTORE;
|
|
}
|
|
if ((mode = commit_to_saved_state(inpf, Astate, ATrail, AStack, AHeap)) !=
|
|
FAIL_RESTORE) {
|
|
CACHE_REGS
|
|
LOCAL_ErrorMessage = NULL;
|
|
return mode;
|
|
}
|
|
return mode;
|
|
}
|
|
|
|
static int OpenRestore(const char *fname, CELL *Astate,
|
|
CELL *ATrail, CELL *AStack, CELL *AHeap,
|
|
FILE **streamp) {
|
|
CACHE_REGS
|
|
|
|
int mode;
|
|
if (fname && fname[0] && (mode = try_open(fname, Astate, ATrail, AStack, AHeap,
|
|
streamp)) != FAIL_RESTORE) {
|
|
setAtomicGlobalPrologFlag(RESOURCE_DATABASE_FLAG,
|
|
MkAtomTerm(Yap_LookupAtom(fname)));
|
|
return mode;
|
|
}
|
|
/* try to open from current directory */
|
|
/* could not open file */
|
|
if (LOCAL_ErrorMessage == NULL) {
|
|
do_SYSTEM_ERROR_INTERNAL(PERMISSION_ERROR_OPEN_SOURCE_SINK,
|
|
"incorrect saved state ");
|
|
} else {
|
|
strncpy(LOCAL_FileNameBuf, fname, YAP_FILENAME_MAX - 1);
|
|
do_SYSTEM_ERROR_INTERNAL(PERMISSION_ERROR_OPEN_SOURCE_SINK,
|
|
"could not open saved state");
|
|
}
|
|
return FAIL_RESTORE;
|
|
}
|
|
|
|
FILE *Yap_OpenRestore(const char *inpf) {
|
|
FILE *stream = NULL;
|
|
|
|
if (!inpf)
|
|
inpf = "startup.yss";
|
|
OpenRestore(inpf, NULL, NULL, NULL, NULL, &stream);
|
|
return stream;
|
|
}
|
|
|
|
static void CloseRestore(void) {
|
|
CACHE_REGS
|
|
#ifdef DEBUG_RESTORE3
|
|
ShowAtoms();
|
|
#endif
|
|
close_file();
|
|
LOCAL_PrologMode = UserMode;
|
|
}
|
|
|
|
#if !defined(_WIN32)
|
|
static int check_opcodes(OPCODE old_ops[]) {
|
|
#if USE_THREADED_CODE
|
|
bool have_shifted = FALSE;
|
|
op_numbers op = _Ystop;
|
|
for (op = _Ystop; op < _std_top; op++) {
|
|
if (Yap_opcode(op) != old_ops[op]) {
|
|
have_shifted = TRUE;
|
|
break;
|
|
}
|
|
}
|
|
return have_shifted;
|
|
#else
|
|
/* be conservative */
|
|
return TRUE;
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
static void RestoreHeap(OPCODE old_ops[] USES_REGS) {
|
|
bool heap_moved = (LOCAL_OldHeapBase != Yap_HeapBase || LOCAL_XDiff),
|
|
opcodes_moved;
|
|
Term mod = CurrentModule;
|
|
|
|
CurrentModule = PROLOG_MODULE;
|
|
#if defined(_WIN32)
|
|
/* It seems that under WIN32 opcodes may not have moved but the
|
|
remaining code may have bmoved */
|
|
opcodes_moved = TRUE;
|
|
#else
|
|
opcodes_moved = check_opcodes(old_ops);
|
|
#endif
|
|
/* opcodes_moved has side-effects and should be tried first */
|
|
if (heap_moved) {
|
|
opcodes_moved = TRUE;
|
|
RestoreFreeSpace(PASS_REGS1);
|
|
}
|
|
if (heap_moved || opcodes_moved) {
|
|
restore_heap();
|
|
}
|
|
/* This must be done after restore_heap */
|
|
Yap_InitAbsmi();
|
|
if (opcodes_moved) {
|
|
Yap_InitCPreds();
|
|
Yap_InitBackCPreds();
|
|
}
|
|
if (!(Yap_ReInitConstExps() && Yap_ReInitUnaryExps() &&
|
|
Yap_ReInitBinaryExps())) {
|
|
Yap_Error(SYSTEM_ERROR_INTERNAL, TermNil,
|
|
"arithmetic operator not in saved state");
|
|
}
|
|
#ifdef DEBUG_RESTORE1
|
|
fprintf(errout, "phase 1 done\n");
|
|
#endif
|
|
CurrentModule = mod;
|
|
}
|
|
|
|
/*
|
|
* This function is called to know about the parameters of the last saved
|
|
* state
|
|
*/
|
|
int Yap_SavedInfo(const char *FileName, CELL *ATrail,
|
|
CELL *AStack, CELL *AHeap) {
|
|
return DO_ONLY_CODE;
|
|
|
|
CELL MyTrail, MyStack, MyHeap, MyState;
|
|
int mode;
|
|
|
|
mode = OpenRestore(FileName, &MyState, &MyTrail, &MyStack, &MyHeap,
|
|
NULL);
|
|
if (mode == FAIL_RESTORE) {
|
|
fprintf(stderr, "restore failed to open %s as a valid state\n", FileName);
|
|
return -1;
|
|
}
|
|
close_file();
|
|
if (!*AHeap)
|
|
*AHeap = MyHeap / 1024;
|
|
if (mode != DO_ONLY_CODE && *AStack)
|
|
*AStack = MyStack / 1024;
|
|
if (mode != DO_ONLY_CODE && *ATrail)
|
|
*ATrail = MyTrail / 1024;
|
|
return (MyState);
|
|
}
|
|
|
|
static void UnmarkTrEntries(USES_REGS1) {
|
|
CELL entry, *Entries;
|
|
|
|
/* initialize a choice point */
|
|
B = (choiceptr)LCL0;
|
|
B--;
|
|
B->cp_ap = NOCODE;
|
|
Entries = (CELL *)LOCAL_TrailBase;
|
|
while ((entry = *Entries++) != (CELL)NULL) {
|
|
if (!IsVarTerm(entry)) {
|
|
if (IsPairTerm(entry)) {
|
|
CELL *ent = CellPtoHeapAdjust(RepPair(entry));
|
|
register CELL flags;
|
|
|
|
flags = *ent;
|
|
ResetFlag(InUseMask, flags);
|
|
*ent = flags;
|
|
if (FlagOn((DirtyMask | ErasedMask), flags)) {
|
|
if (FlagOn(DBClMask, flags)) {
|
|
Yap_ErDBE(DBStructFlagsToDBStruct(ent));
|
|
} else {
|
|
if (flags & LogUpdMask) {
|
|
if (flags & IndexMask) {
|
|
if (FlagOn(ErasedMask, flags))
|
|
Yap_ErLogUpdIndex(ClauseFlagsToLogUpdIndex(ent));
|
|
else
|
|
Yap_CleanUpIndex(ClauseFlagsToLogUpdIndex(ent));
|
|
} else {
|
|
Yap_ErLogUpdCl(ClauseFlagsToLogUpdClause(ent));
|
|
}
|
|
} else {
|
|
Yap_ErCl(ClauseFlagsToDynamicClause(ent));
|
|
}
|
|
}
|
|
}
|
|
#ifdef MULTI_ASSIGNMENT_VARIABLES
|
|
} else /* if (IsApplTerm(d1)) */ {
|
|
Entries += 2;
|
|
#endif
|
|
}
|
|
}
|
|
}
|
|
B = NULL;
|
|
}
|
|
|
|
int in_limbo = FALSE;
|
|
|
|
/* cleanup any records we had in the saved state. They are now inaccessible */
|
|
static void FreeRecords(void) {
|
|
struct record_list *ptr;
|
|
|
|
ptr = Yap_Records;
|
|
Yap_Records = NULL;
|
|
while (ptr) {
|
|
struct record_list *optr = ptr;
|
|
Yap_ReleaseTermFromDB(ptr->dbrecord);
|
|
ptr = ptr->next_rec;
|
|
Yap_FreeCodeSpace((void *)optr);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* This function is called when wanting only to restore the heap and
|
|
* associated registers
|
|
*/
|
|
static int Restore(char *s_dir USES_REGS) {
|
|
int restore_mode;
|
|
|
|
OPCODE old_ops[_std_top + 1];
|
|
CELL MyTrail, MyStack, MyHeap, MyState;
|
|
|
|
if ((restore_mode = OpenRestore(s_dir, &MyState, &MyTrail, &MyStack,
|
|
&MyHeap, NULL)) == FAIL_RESTORE)
|
|
return (FALSE);
|
|
Yap_ShutdownLoadForeign();
|
|
in_limbo = TRUE;
|
|
if (get_coded(restore_mode, old_ops PASS_REGS) < 0)
|
|
return FAIL_RESTORE;
|
|
restore_regs(restore_mode PASS_REGS);
|
|
in_limbo = FALSE;
|
|
/*#endif*/
|
|
RestoreHeap(old_ops PASS_REGS);
|
|
switch (restore_mode) {
|
|
case DO_EVERYTHING:
|
|
if (LOCAL_OldHeapBase != Yap_HeapBase || LOCAL_OldLCL0 != LCL0 ||
|
|
LOCAL_OldGlobalBase != (CELL *)LOCAL_GlobalBase ||
|
|
LOCAL_OldTrailBase != LOCAL_TrailBase) {
|
|
Yap_AdjustStacksAndTrail();
|
|
if (which_save == 2) {
|
|
Yap_AdjustRegs(2);
|
|
} else {
|
|
Yap_AdjustRegs(1);
|
|
}
|
|
break;
|
|
#ifdef DEBUG_RESTORE2
|
|
fprintf(errout, "phase 2 done\n");
|
|
#endif
|
|
}
|
|
break;
|
|
case DO_ONLY_CODE:
|
|
UnmarkTrEntries(PASS_REGS1);
|
|
Yap_InitYaamRegs(0, true);
|
|
break;
|
|
}
|
|
|
|
Yap_ReOpenLoadForeign();
|
|
FreeRecords();
|
|
/* restart IO */
|
|
// initIO();
|
|
/* reset time */
|
|
Yap_ReInitWTime();
|
|
#if USE_DL_MALLOC || USE_SYSTEM_MALLOC
|
|
if (!AuxSp) {
|
|
Yap_InitPreAllocCodeSpace(0);
|
|
}
|
|
#endif
|
|
CloseRestore();
|
|
if (which_save == 2) {
|
|
Yap_unify(ARG2, MkIntTerm(0));
|
|
}
|
|
return restore_mode;
|
|
}
|
|
|
|
int Yap_SavedStateRestore(char *s) {
|
|
CACHE_REGS
|
|
return Restore(s PASS_REGS);
|
|
}
|
|
|
|
static Int p_restore(USES_REGS1) {
|
|
int mode;
|
|
char s[YAP_FILENAME_MAX + 1];
|
|
|
|
Term t1 = Deref(ARG1);
|
|
#ifdef YAPOR
|
|
if (GLOBAL_number_workers != 1) {
|
|
Yap_Error(SYSTEM_ERROR_INTERNAL, TermNil,
|
|
"cannot perform save: more than a worker/thread running");
|
|
return (FALSE);
|
|
}
|
|
#endif /* YAPOR */
|
|
#ifdef THREADS
|
|
if (GLOBAL_NOfThreads != 1) {
|
|
Yap_Error(SYSTEM_ERROR_INTERNAL, TermNil,
|
|
"cannot perform save: more than a worker/thread running");
|
|
return (FALSE);
|
|
}
|
|
#endif /* THREADS */
|
|
if (!Yap_GetName(s, YAP_FILENAME_MAX, t1)) {
|
|
Yap_Error(TYPE_ERROR_LIST, t1, "restore/1");
|
|
return (FALSE);
|
|
}
|
|
if ((mode = Restore(s PASS_REGS)) == DO_ONLY_CODE) {
|
|
Yap_RestartYap(3);
|
|
}
|
|
return (mode != FAIL_RESTORE);
|
|
}
|
|
|
|
void Yap_InitSavePreds(void) {
|
|
Yap_InitCPred("$save", 2, p_save2, SyncPredFlag);
|
|
Yap_InitCPred("$save_program", 1, p_save_program, SyncPredFlag);
|
|
Yap_InitCPred("$restore", 1, p_restore, SyncPredFlag);
|
|
}
|