1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142
|
/****************************************************************
* *
* Copyright (c) 2013-2017 Fidelity National Information *
* Services, Inc. and/or its subsidiaries. All rights reserved. *
* *
* This source code contains the intellectual property *
* of its copyright holder(s), and is made available *
* under a license. If you do not know the terms of *
* the license, please stop and do not read further. *
* *
****************************************************************/
#include "mdef.h"
#include "gdsroot.h"
#include "gtm_facility.h"
#include "fileinfo.h"
#include "gdsbt.h"
#include "gdsfhead.h"
#include "filestruct.h"
#include "targ_alloc.h"
#include "gvnh_spanreg.h"
#include "gvcst_protos.h"
/* Initialize gvnh_reg->gvspan if input global spans multiple regions.
* "gvnh_reg" is the gvnh_reg_t structure that has already been allocated for this global name.
* "addr" is the corresponding gd_addr (global directory structure) whose hashtable contains "gvnh_reg"
* "gvmap_start" is the map entry in the gld file where the unsubscripted global name maps to.
*/
void gvnh_spanreg_init(gvnh_reg_t *gvnh_reg, gd_addr *addr, gd_binding *gvmap_start)
{
gvnh_spanreg_t *gvspan;
gd_binding *gvmap_end, *gdmap_start;
mident *gvname;
char *gvent_name, *c, *c_top;
int gvent_len, res, reg_index, gvspan_size;
unsigned int min_reg_index, max_reg_index;
gd_region *reg, *reg_start;
# ifdef DEBUG
boolean_t min_reg_index_adjusted = FALSE;
gd_region *reg_top;
gd_binding *gdmap_top;
trans_num gd_targ_tn, *tn_array;
# endif
DCL_THREADGBL_ACCESS;
SETUP_THREADGBL_ACCESS;
/* At this point "gvnh_reg->gd_reg" and "gvnh_reg->gvt" have already been initialized */
/* First check if global spans multiple regions */
gvname = &gvnh_reg->gvt->gvname.var_name;
gvent_len = gvname->len;
gvent_name = gvname->addr;
/* Assert that gvname is not subscripted (i.e. does not contain null bytes) */
# ifdef DEBUG
c = gvent_name;
c_top = gvent_name + gvent_len;
for ( ; c < c_top; c++)
assert(KEY_DELIMITER != *c);
# endif
gvmap_end = gvmap_start;
if (!TREF(no_spangbls))
{
reg_start = addr->regions;
min_reg_index = addr->n_regions; /* impossible value of index into addr->regions[] array */
DEBUG_ONLY(reg_top = reg_start + min_reg_index;)
max_reg_index = 0;
DEBUG_ONLY(INCREMENT_GD_TARG_TN(gd_targ_tn);) /* takes a copy of incremented "TREF(gd_targ_tn)"
* into local variable "gd_targ_tn" */
DEBUG_ONLY(tn_array = TREF(gd_targ_reg_array);) /* could be NULL if no spanning globals were seen till now */
for ( ; ; gvmap_end++)
{
res = memcmp(gvent_name, &(gvmap_end->gvkey.addr[0]), gvent_len);
assert(0 >= res);
reg = gvmap_end->reg.addr;
GET_REG_INDEX(addr, reg_start, reg, reg_index); /* sets "reg_index" */
# ifdef DEBUG
if (NULL != tn_array)
tn_array[reg_index] = gd_targ_tn;
# endif
if (min_reg_index > reg_index)
min_reg_index = reg_index;
if (max_reg_index < reg_index)
max_reg_index = reg_index;
assert((0 != res) || (gvent_len <= gvmap_end->gvname_len));
if ((0 > res) || ((0 == res) && (gvent_len < gvmap_end->gvname_len)))
break;
}
}
/* else : no_spangbls is TRUE which means this process does not need to worry about globals spanning multiple regions */
if (gvmap_end == gvmap_start)
{ /* global does not span multiple regions. */
gvnh_reg->gvspan = NULL;
return;
}
TREF(spangbl_seen) = TRUE; /* we found at least one global that spans multiple regions */
/* If global name is ^%YGS, the map entries for ^%YGS might change with time (see OPEN_BASEREG_IF_STATSREG macro
* AND ygs_map->reg.addr in "gvcst_init_statsDB"). So keep min_reg_index as lowest possible value.
*/
if ((gvent_len == STATSDB_GBLNAME_LEN) && (0 == memcmp(gvent_name, STATSDB_GBLNAME, STATSDB_GBLNAME_LEN)))
{
DEBUG_ONLY(min_reg_index_adjusted = TRUE;)
min_reg_index = 0;
}
/* Allocate and initialize a gvnh_spanreg_t structure and link it to gvnh_reg.
* Note gvt_array[] size is max_reg_index - min_reg_index + 1.
*/
gvspan_size = SIZEOF(gvspan->gvt_array[0]) * (max_reg_index - min_reg_index);
gvspan = (gvnh_spanreg_t *)malloc(SIZEOF(gvnh_spanreg_t) + gvspan_size);
gvspan->min_reg_index = min_reg_index;
gvspan->max_reg_index = max_reg_index;
gdmap_start = addr->maps;
DEBUG_ONLY(gdmap_top = gdmap_start + addr->n_maps;)
assert((gvmap_start >= gdmap_start) && (gvmap_start < gdmap_top));
assert((gvmap_end >= gdmap_start) && (gvmap_end < gdmap_top));
gvspan->start_map_index = gvmap_start - gdmap_start;
gvspan->end_map_index = gvmap_end - gdmap_start;
/* Initialize the array of gv_targets (corresponding to each spanned region) to NULL initially.
* As and when each region is referenced, the gv_targets will get allocated.
*/
memset(&gvspan->gvt_array[0], 0, gvspan_size + SIZEOF(gvspan->gvt_array[0]));
# ifdef DEBUG
if (!min_reg_index_adjusted)
{ /* Initialize the region slots that are not spanned to by this global with a distinct "invalid" value */
assert(tn_array[min_reg_index] == gd_targ_tn);
assert(tn_array[max_reg_index] == gd_targ_tn);
for (reg_index = min_reg_index; reg_index <= max_reg_index; reg_index++)
{
if (tn_array[reg_index] != gd_targ_tn)
gvspan->gvt_array[reg_index - min_reg_index] = INVALID_GV_TARGET;
}
}
# endif
gvnh_reg->gvspan = gvspan;
/* Initialize gvt for the region that the unsubscripted global name maps to */
reg = gvmap_start->reg.addr;
GET_REG_INDEX(addr, reg_start, reg, reg_index); /* sets "reg_index" */
assert((reg_index >= min_reg_index) && (reg_index <= max_reg_index));
assert(INVALID_GV_TARGET != gvspan->gvt_array[reg_index - min_reg_index]); /* Assert that this region is indeed
* mapped to by the spanning global */
gvspan->gvt_array[reg_index - min_reg_index] = gvnh_reg->gvt;
return;
}
|