fis-gtm/sr_port/mu_gv_stack_init.c

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/****************************************************************
* *
* Copyright 2003, 2010 Fidelity Information Services, Inc *
* *
* 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 "gtm_string.h"
#include "gdsroot.h"
#include "gdskill.h"
#include "gtm_facility.h"
#include "fileinfo.h"
#include "gdsbt.h"
#include "gdsblk.h"
#include "gdsfhead.h"
#include "rtnhdr.h"
#include "mv_stent.h"
#include "stack_frame.h"
#include "mu_gv_stack_init.h"
GBLREF gv_key *gv_currkey;
GBLREF gv_namehead *gv_target;
GBLREF gd_region *gv_cur_region;
GBLREF int4 gv_keysize;
GBLREF gv_key *gv_altkey;
GBLREF mv_stent *mv_chain;
GBLREF stack_frame *frame_pointer;
GBLREF unsigned char *msp, *stackbase, *stacktop, *stackwarn;
void mu_gv_stack_init(void)
{
rhdtyp *rtnhdr;
lab_tabent *labtbe;
lnr_tabent *lnrtbe;
unsigned char *mstack_ptr;
GVKEY_INIT(gv_currkey, gv_keysize);
GVKEY_INIT(gv_altkey, gv_keysize);
/* There may be M transactions in the journal files. If so, op_tstart() and op_tcommit()
* will be called during recovery; they require a couple of dummy stack frames to be set up.
*/
# ifdef UNIX
/* Triggers and error recovery in same will also need them. We don't actually need an executable routine,
* just one that "looks" executable for errorhandling.
*/
rtnhdr = (rhdtyp *)malloc(SIZEOF(rhdtyp) + RLEN + SIZEOF(lab_tabent) + (2 * SIZEOF(lnr_tabent)));
memset(rtnhdr, 0, SIZEOF(rhdtyp));
rtnhdr->src_full_name.addr = rtnhdr->routine_name.addr = UTIL_BASE_FRAME_NAME;
rtnhdr->src_full_name.len = rtnhdr->routine_name.len = STRLEN(UTIL_BASE_FRAME_NAME);
rtnhdr->lnrtab_len = 2; /* 2 line number table entries (lines 0 and 1) */
# ifdef USHBIN_SUPPORTED
rtnhdr->ptext_adr = (unsigned char *)rtnhdr + SIZEOF(rhdtyp);
rtnhdr->ptext_end_adr = rtnhdr->ptext_adr + RLEN;
rtnhdr->vartab_adr = (var_tabent *)rtnhdr->ptext_end_adr; /* No vars */
rtnhdr->labtab_adr = (lab_tabent *)rtnhdr->ptext_end_adr; /* 1 label */
rtnhdr->lnrtab_adr = (lnr_tabent *)((char *)rtnhdr->labtab_adr + SIZEOF(lab_tabent));
rtnhdr->current_rhead_adr = rtnhdr;
labtbe = LABTAB_ADR(rtnhdr);
labtbe->lnr_adr = LNRTAB_ADR(rtnhdr);
# else /* non-USHBIN */
rtnhdr->ptext_off = SIZEOF(rhdtyp);
rtnhdr->vartab_off = rtnhdr->ptext_off + RLEN;
rtnhdr->labtab_off = rtnhdr->vartab_off;
rtnhdr->lnrtab_off = rtnhdr->labtab_off + SIZEOF(lab_tabent);
labtbe = LABTAB_ADR(rtnhdr);
labtbe->lab_ln_ptr = 0;
/* current_rhead_off can stay at its initialized 0 since it is an offset in non-USHBIN */
# endif
labtbe->lab_name.addr = UTIL_BASE_LABEL_NAME;
labtbe->lab_name.len = STRLEN(UTIL_BASE_LABEL_NAME);
lnrtbe = LNRTAB_ADR(rtnhdr);
*lnrtbe++ = 0 NON_USHBIN_ONLY( + SIZEOF(*rtnhdr));
*lnrtbe++ = 0 NON_USHBIN_ONLY( + SIZEOF(*rtnhdr));
/* Create the base (back stop) frame */
base_frame(rtnhdr);
/* Now create the fake execution frame */
new_stack_frame(rtnhdr, NULL, PTEXT_ADR(rtnhdr));
# elif defined(VMS)
mstack_ptr = (unsigned char *)malloc(USER_STACK_SIZE);
msp = stackbase = mstack_ptr + USER_STACK_SIZE - SIZEOF(char *);
mv_chain = (mv_stent *)msp;
stacktop = mstack_ptr + 2 * mvs_size[MVST_NTAB];
stackwarn = stacktop + 1024;
msp -= SIZEOF(stack_frame);
frame_pointer = (stack_frame *)msp;
memset(frame_pointer, 0, SIZEOF(stack_frame));
frame_pointer->type = SFT_COUNT;
frame_pointer->temps_ptr = (unsigned char *)frame_pointer; /* no temporaries in this frame */
--frame_pointer;
memset(frame_pointer, 0, SIZEOF(stack_frame));
frame_pointer->type = SFT_COUNT;
frame_pointer->temps_ptr = (unsigned char *)frame_pointer; /* no temporaries in this frame either */
frame_pointer->old_frame_pointer = (stack_frame *)msp;
msp = (unsigned char *)frame_pointer;
# else
# error "Unsupported platform"
# endif
}