void goframes(int4 frames)
#endif
{
mval *ret_targ;
GTMTRIG_ONLY(goframes_unwound_trigger = FALSE);
for (ret_targ = NULL; frames--; )
{
while (tp_pointer && tp_pointer->fp <= frame_pointer)
{
OP_TROLLBACK(-1);
}
if (0 == frames)
{
ret_targ = (mval *)get_ret_targ(NULL);
/* If alias_retarg is non-NULL, *ret_targ would have been already initialized so no need to set it.
* Setting it to literal_null in that case would cause reference counts to not be decremented later
* in op_unwind/mdb_condition_handler so it is actually necessary to skip it in that case.
*/
if ((NULL != ret_targ) && (NULL == alias_retarg))
{
*ret_targ = literal_null;
ret_targ->mvtype |= MV_RETARG;
}
}
skip_error_ret = TRUE;
# ifdef GTM_TRIGGER
if (!(SFT_TRIGR & frame_pointer->type))
{ /* Normal frame unwind */
DBGTRIGR((stderr, "goframes: unwinding regular frame at %016lx\n", frame_pointer));
op_unwind();
DBGTRIGR((stderr, "goframes: after regular frame unwind: frame_pointer 0x%016lx ctxt value: 0x%016lx\n",
frame_pointer, ctxt));
} else
{ /* Trigger base frame unwind (special case) */
DBGTRIGR((stderr, "goframes: unwinding trigger base frame at %016lx\n", frame_pointer));
gtm_trigger_fini(TRUE, fromzgoto);
goframes_unwound_trigger = TRUE;
}
# else
/* If triggers are not enabled, just a normal unwind */
DBGEHND((stderr, "goframes: unwinding regular frame at %016lx\n", frame_pointer));
op_unwind();
# endif
assert(FALSE == skip_error_ret); /* op_unwind() should have read and reset this */
skip_error_ret = FALSE; /* be safe in PRO versions */
}
# ifdef GTM_TRIGGER
if (unwtrigrframe && (SFT_TRIGR & frame_pointer->type))
{ /* If we landed on a trigger base frame after unwinding everything, we are in the same boat as if we had run into
* one while we were unwinding. We cannot return this frame to (for example) zgoto which is going to morph it into
* something else (unwtrigrframe only set when ZGOTO with entryref specified). So if the flag says we should never
* land on a trigger frame, go ahead and unwind that one too.
*/
DBGTRIGR((stderr, "goframes: unwinding trailing trigger base frame at %016lx\n", frame_pointer));
gtm_trigger_fini(TRUE, fromzgoto);
goframes_unwound_trigger = TRUE;
}
# endif
return;
}
/* This has to be maintained in parallel with op_unwind(), the unwind without a return argument (intrinsic quit) routine. */
int unw_retarg(mval *src, boolean_t alias_return)
{
mval ret_value, *trg;
boolean_t got_ret_target;
stack_frame *prevfp;
lv_val *srclv, *srclvc, *base_lv;
symval *symlv, *symlvc;
int4 srcsymvlvl;
DCL_THREADGBL_ACCESS;
SETUP_THREADGBL_ACCESS;
assert((frame_pointer < frame_pointer->old_frame_pointer) || (NULL == frame_pointer->old_frame_pointer));
assert(NULL == alias_retarg);
alias_retarg = NULL;
DBGEHND_ONLY(prevfp = frame_pointer);
if (tp_pointer && tp_pointer->fp <= frame_pointer)
rts_error(VARLSTCNT(1) ERR_TPQUIT);
assert(msp <= stackbase && msp > stacktop);
assert(mv_chain <= (mv_stent *)stackbase && mv_chain > (mv_stent *)stacktop);
assert(frame_pointer <= (stack_frame *)stackbase && frame_pointer > (stack_frame *)stacktop);
got_ret_target = FALSE;
/* Before we do any unwinding or even verify the existence of the return var, check to see if we are returning
* an alias (or container). We do this now because (1) alias returns don't need to be defined and (2) the returning
* item could go out of scope in the unwinds so we have to bump the returned item's reference counts NOW.
*/
if (!alias_return)
{ /* Return of "regular" value - Verify it exists */
MV_FORCE_DEFINED(src);
ret_value = *src;
ret_value.mvtype &= ~MV_ALIASCONT; /* Make sure alias container of regular return does not propagate */
} else
{ /* QUIT *var or *var(indx..) syntax was used - see which one it was */
assert(NULL != src);
srclv = (lv_val *)src; /* Since can never be an expression, this relationship is guaranteed */
if (!LV_IS_BASE_VAR(srclv))
{ /* Have a potential container var - verify */
if (!(MV_ALIASCONT & srclv->v.mvtype))
rts_error(VARLSTCNT(1) ERR_ALIASEXPECTED);
ret_value = *src;
srclvc = (lv_val *)srclv->v.str.addr;
assert(LV_IS_BASE_VAR(srclvc)); /* Verify base var */
assert(srclvc->stats.trefcnt >= srclvc->stats.crefcnt);
assert(1 <= srclvc->stats.crefcnt); /* Verify is existing container ref */
base_lv = LV_GET_BASE_VAR(srclv);
symlv = LV_GET_SYMVAL(base_lv);
symlvc = LV_GET_SYMVAL(srclvc);
MARK_ALIAS_ACTIVE(MIN(symlv->symvlvl, symlvc->symvlvl));
DBGRFCT((stderr, "unw_retarg: Returning alias container 0x"lvaddr" pointing to 0x"lvaddr" to caller\n",
src, srclvc));
} else
{ /* Creating a new alias - create a container to pass back */
memcpy(&ret_value, &literal_null, SIZEOF(mval));
ret_value.mvtype |= MV_ALIASCONT;
ret_value.str.addr = (char *)srclv;
srclvc = srclv;
MARK_ALIAS_ACTIVE(LV_SYMVAL(srclv)->symvlvl);
DBGRFCT((stderr, "unw_retarg: Returning alias 0x"lvaddr" to caller\n", srclvc));
}
INCR_TREFCNT(srclvc);
INCR_CREFCNT(srclvc); /* This increment will be reversed if this container gets put into an alias */
/* We have a slight chicken-and-egg problem now. The mv_stent unwind loop below may pop a symbol table thus
* destroying the lv_val in our container. To prevent this, we need to locate the parm block before the symval is
* unwound and set the return value and alias_retarg appropriately so the symtab unwind logic called by
* unw_mv_ent() can work any necessary relocation magic on the return var.
*/
trg = get_ret_targ(NULL);
if (NULL != trg)
{
*trg = ret_value;
alias_retarg = trg;
got_ret_target = TRUE;
} /* else fall into below which will raise the NOTEXTRINSIC error */
}
/* Note: we are unwinding uncounted (indirect) frames here to allow the QUIT command to have indirect arguments
* and thus be executed by commarg in an indirect frame. By unrolling the indirect frames here we get back to
* the point where we can find where to put the quit value.
*/
unwind_nocounts();
assert(frame_pointer && (frame_pointer->type & SFT_COUNT));
while (mv_chain < (mv_stent *)frame_pointer)
{
msp = (unsigned char *)mv_chain;
unw_mv_ent(mv_chain);
POP_MV_STENT();
}
if (0 <= frame_pointer->dollar_test)
dollar_truth = (boolean_t)frame_pointer->dollar_test;
/* Now that we have unwound the uncounted frames, we should be left with a counted frame that
* contains some ret_value, NULL or not. If the value is non-NULL, let us restore the $TEST
* value from that frame as well as update *trg for non-alias returns.
*/
if ((trg = frame_pointer->ret_value) && !alias_return) /* CAUTION: Assignment */
{ /* If this is an alias_return arg, bypass the arg set logic which was done above. */
assert(!got_ret_target);
got_ret_target = TRUE;
*trg = ret_value;
}
/* do not throw an error if return value is expected from a non-extrinsic, but dollar_zquit_anyway is true */
if (!dollar_zquit_anyway && !got_ret_target)
rts_error(VARLSTCNT(1) ERR_NOTEXTRINSIC); /* This routine was not invoked as an extrinsic function */
/* Note that error_ret() should be invoked only after the rts_error() of TPQUIT and NOTEXTRINSIC.
* This is so the TPQUIT/NOTEXTRINSIC error gets noted down in $ECODE (which wont happen if error_ret() is called before).
*/
INVOKE_ERROR_RET_IF_NEEDED;
if (is_tracing_on)
(*unw_prof_frame_ptr)();
msp = (unsigned char *)frame_pointer + SIZEOF(stack_frame);
DRAIN_GLVN_POOL_IF_NEEDED;
PARM_ACT_UNSTACK_IF_NEEDED;
frame_pointer = frame_pointer->old_frame_pointer;
DBGEHND((stderr, "unw_retarg: Stack frame 0x"lvaddr" unwound - frame 0x"lvaddr" now current - New msp: 0x"lvaddr"\n",
prevfp, frame_pointer, msp));
if ((NULL != zyerr_frame) && (frame_pointer > zyerr_frame))
zyerr_frame = NULL;
if (!frame_pointer)
rts_error(VARLSTCNT(1) ERR_STACKUNDERFLO);
assert(frame_pointer >= (stack_frame *)msp);
/* ensuring that trg is not NULL */
if (!dollar_zquit_anyway || trg)
trg->mvtype |= MV_RETARG;
assert((frame_pointer < frame_pointer->old_frame_pointer) || (NULL == frame_pointer->old_frame_pointer));
return 0;
}
void zshow_svn(zshow_out *output)
{
mstr x;
mval var, zdir;
io_log_name *tl;
stack_frame *fp;
int count, save_dollar_zlevel;
char *c1, *c2;
char zdir_error[3 * GTM_MAX_DIR_LEN + 128]; /* PATH_MAX + "->" + GTM-W-ZDIROUTOFSYNC, <text of ZDIROUTOFSYNC> */
error_def(ERR_ZDIROUTOFSYNC);
/* SV_DEVICE */
get_dlr_device(&var);
ZS_VAR_EQU(&x, device_text);
mval_write(output, &var, TRUE);
/* SV_ECODE */
ecode_get(-1, &var);
ZS_VAR_EQU(&x, ecode_text);
mval_write(output, &var, TRUE);
/* SV_ESTACK */
save_dollar_zlevel = dollar_zlevel();
count = (save_dollar_zlevel - 1) - dollar_estack_delta.m[0];
MV_FORCE_MVAL(&var, count);
ZS_VAR_EQU(&x, estack_text);
mval_write(output, &var, TRUE);
/* SV_ETRAP */
var.mvtype = MV_STR;
var.str = dollar_etrap.str;
ZS_VAR_EQU(&x, etrap_text);
mval_write(output, &var, TRUE);
/* SV_HOROLOG */
op_horolog(&var);
ZS_VAR_EQU(&x, horolog_text);
mval_write(output, &var, TRUE);
/* SV_IO */
var.str.addr = io_curr_device.in->name->dollar_io;
var.str.len = io_curr_device.in->name->len;
/*** The following should be in the I/O code ***/
if (ESC == *var.str.addr)
{
if (5 > var.str.len)
var.str.len = 0;
else
{
var.str.addr += ESC_OFFSET;
var.str.len -= ESC_OFFSET;
}
}
var.mvtype = MV_STR;
ZS_VAR_EQU(&x, io_text);
mval_write(output, &var, TRUE);
/* SV_JOB */
ZS_VAR_EQU(&x, job_text);
mval_write(output, &dollar_job, TRUE);
/* SV_KEY */
get_dlr_key(&var);
ZS_VAR_EQU(&x, key_text);
mval_write(output, &var, TRUE);
/* SV_PRINCIPAL */
if (dollar_principal)
tl = dollar_principal;
else
tl = io_root_log_name->iod->trans_name;
var.str.addr = tl->dollar_io;
var.str.len = tl->len;
/*** The following should be in the I/O code ***/
if (ESC == *var.str.addr)
{
if (5 > var.str.len)
var.str.len = 0;
else
{
var.str.addr += ESC_OFFSET;
var.str.len -= ESC_OFFSET;
}
}
var.mvtype = MV_STR;
ZS_VAR_EQU(&x, principal_text);
mval_write(output, &var, TRUE);
/* SV_QUIT */
count = ((NULL == get_ret_targ()) ? 0 : 1);
MV_FORCE_MVAL(&var, count);
ZS_VAR_EQU(&x, quit_text);
mval_write(output, &var, TRUE);
/* SV_REFERENCE */
get_reference(&var);
ZS_VAR_EQU(&x, reference_text);
mval_write(output, &var, TRUE);
/* SV_STACK */
count = (save_dollar_zlevel - 1);
MV_FORCE_MVAL(&var, count);
ZS_VAR_EQU(&x, stack_text);
mval_write(output, &var, TRUE);
/* SV_STORAGE */
i2mval(&var, getstorage());
ZS_VAR_EQU(&x, storage_text);
mval_write(output, &var, TRUE);
/* SV_SYSTEM */
var.mvtype = MV_STR;
var.str = dollar_system.str;
ZS_VAR_EQU(&x, system_text);
mval_write(output, &var, TRUE);
/* SV_TEST */
i2mval(&var, (int)op_dt_get());
ZS_VAR_EQU(&x, test_text);
mval_write(output, &var, TRUE);
/* SV_TLEVEL */
count = (int)dollar_tlevel;
MV_FORCE_MVAL(&var, count);
ZS_VAR_EQU(&x, tlevel_text);
mval_write(output, &var, TRUE);
/* SV_TRESTART */
MV_FORCE_MVAL(&var, (int)((MAX_VISIBLE_TRESTART < dollar_trestart) ? MAX_VISIBLE_TRESTART : dollar_trestart));
ZS_VAR_EQU(&x, trestart_text);
mval_write(output, &var, TRUE);
/* SV_X */
count = (int)io_curr_device.out->dollar.x;
MV_FORCE_MVAL(&var, count);
ZS_VAR_EQU(&x, x_text);
mval_write(output, &var, TRUE);
/* SV_Y */
count = (int)io_curr_device.out->dollar.y;
MV_FORCE_MVAL(&var, count);
ZS_VAR_EQU(&x, y_text);
mval_write(output, &var, TRUE);
/* SV_ZA */
count = (int)io_curr_device.in->dollar.za;
MV_FORCE_MVAL(&var, count);
ZS_VAR_EQU(&x, za_text);
mval_write(output, &var, TRUE);
/* SV_ZB */
c1 = (char *)io_curr_device.in->dollar.zb;
c2 = c1 + sizeof(io_curr_device.in->dollar.zb);
var.mvtype = MV_STR;
var.str.addr = (char *)io_curr_device.in->dollar.zb;
while (c1 < c2 && *c1)
c1++;
var.str.len = (char *)c1 - var.str.addr;
ZS_VAR_EQU(&x, zb_text);
mval_write(output, &var, TRUE);
/* SV_ZCMDLINE */
get_command_line(&var, TRUE); /* TRUE to indicate we want $ZCMDLINE (i.e. processed not actual command line) */
ZS_VAR_EQU(&x, zcmdline_text);
mval_write(output, &var, TRUE);
/* SV_ZCOMPILE */
var.mvtype = MV_STR;
var.str = dollar_zcompile;
ZS_VAR_EQU(&x, zcompile_text);
mval_write(output, &var, TRUE);
/* SV_ZCSTATUS */
MV_FORCE_MVAL(&var, dollar_zcstatus);
ZS_VAR_EQU(&x, zcstatus_text);
mval_write(output, &var, TRUE);
/* SV_ZDATEFORM */
MV_FORCE_MVAL(&var, zdate_form);
ZS_VAR_EQU(&x, zdate_form_text);
mval_write(output, &var, TRUE);
/* SV_ZDIR */
ZS_VAR_EQU(&x, zdirectory_text);
setzdir(NULL, &zdir);
if (zdir.str.len != dollar_zdir.str.len || 0 != memcmp(zdir.str.addr, dollar_zdir.str.addr, zdir.str.len))
{
memcpy(zdir_error, zdir.str.addr, zdir.str.len);
memcpy(&zdir_error[zdir.str.len], arrow_text, STR_LIT_LEN(arrow_text));
sgtm_putmsg(&zdir_error[zdir.str.len + STR_LIT_LEN(arrow_text)], VARLSTCNT(6) ERR_ZDIROUTOFSYNC, 4,
zdir.str.len, zdir.str.addr, dollar_zdir.str.len, dollar_zdir.str.addr);
zdir.str.addr = zdir_error;
zdir.str.len = strlen(zdir_error) - 1; /* eliminate trailing '\n' */
}
SKIP_DEVICE_IF_NOT_NEEDED(&zdir);
mval_write(output, &zdir, TRUE);
/* SV_ZEDITOR */
MV_FORCE_MVAL(&var, dollar_zeditor);
ZS_VAR_EQU(&x, zeditor_text);
mval_write(output, &var, TRUE);
/* SV_ZEOF */
ZS_VAR_EQU(&x, zeof_text);
mval_write(output, io_curr_device.in->dollar.zeof ? (mval *)&literal_one : (mval *)&literal_zero, TRUE);
/* SV_ZERROR */
var.mvtype = MV_STR;
var.str = dollar_zerror.str;
ZS_VAR_EQU(&x, zerror_text);
mval_write(output, &var, TRUE);
/* SV_ZGBLDIR */
ZS_VAR_EQU(&x, zgbldir_text);
mval_write(output, &dollar_zgbldir, TRUE);
/* SV_ZININTERRUPT */
MV_FORCE_MVAL(&var, dollar_zininterrupt);
ZS_VAR_EQU(&x, zininterrupt_text);
mval_write(output, &var, TRUE);
/* SV_ZINTERRUPT */
var.mvtype = MV_STR;
var.str = dollar_zinterrupt.str;
ZS_VAR_EQU(&x, zinterrupt_text);
mval_write(output, &var, TRUE);
/* SV_ZIO */
var.mvtype = MV_STR;
/* NOTE: This is **NOT** equivalent to :
* io_curr_log_name->dollar_io
*/
var.str.addr = io_curr_device.in->trans_name->dollar_io;
var.str.len = io_curr_device.in->trans_name->len;
if (*var.str.addr == ESC)
{
if (5 > var.str.len)
var.str.len = 0;
else
{
var.str.addr += ESC_OFFSET;
var.str.len -= ESC_OFFSET;
}
}
ZS_VAR_EQU(&x, zio_text);
mval_write(output, &var, TRUE);
/* SV_ZJOB */
MV_FORCE_ULONG_MVAL(&var, dollar_zjob);
ZS_VAR_EQU(&x, zjob_text);
mval_write(output, &var, TRUE);
/* SV_ZLEVEL */
MV_FORCE_MVAL(&var, save_dollar_zlevel);
ZS_VAR_EQU(&x, zlevel_text);
mval_write(output, &var, TRUE);
/* SV_ZMAXTPTIME */
MV_FORCE_MVAL(&var, dollar_zmaxtptime);
ZS_VAR_EQU(&x, zmaxtptime_text);
mval_write(output, &var, TRUE);
/* SV_ZMODE */
ZS_VAR_EQU(&x, zmode_text);
mval_write(output, &dollar_zmode, TRUE);
/* SV_ZPOS */
getzposition(&var);
ZS_VAR_EQU(&x, zpos_text);
mval_write(output, &var, TRUE);
/* SV_ZPROC */
ZS_VAR_EQU(&x, zproc_text);
mval_write(output, &dollar_zproc, TRUE);
/* SV_PROMPT */
var.mvtype = MV_STR;
var.str.addr = gtmprompt.addr;
var.str.len = gtmprompt.len;
ZS_VAR_EQU(&x, zprompt_text);
mval_write(output, &var, TRUE);
/* SV_ZROUTINES */
if (!zro_root)
zro_init();
var.mvtype = MV_STR;
var.str = dollar_zroutines;
ZS_VAR_EQU(&x, zroutines_text);
mval_write(output, &var, TRUE);
/* SV_ZSOURCE */
var.mvtype = MV_STR;
var.str = dollar_zsource;
ZS_VAR_EQU(&x, zsource_text);
mval_write(output, &var, TRUE);
/* SV_ZSTATUS */
ZS_VAR_EQU(&x, zstatus_text);
mval_write(output, &dollar_zstatus, TRUE);
/* SV_ZSTEP */
ZS_VAR_EQU(&x, zstep_text);
mval_write(output, &dollar_zstep, TRUE);
/* SV_ZSYSTEM */
MV_FORCE_MVAL(&var, dollar_zsystem);
ZS_VAR_EQU(&x, zsystem_text);
mval_write(output, &var, TRUE);
/* SV_ZTEXIT */
var.mvtype = MV_STR;
var.str = dollar_ztexit.str;
ZS_VAR_EQU(&x, ztexit_text);
mval_write(output, &var, TRUE);
/* SV_ZTRAP */
var.mvtype = MV_STR;
var.str = dollar_ztrap.str;
ZS_VAR_EQU(&x, ztrap_text);
mval_write(output, &var, TRUE);
/* SV_ZVERSION */
var.mvtype = MV_STR;
var.str.addr = (char *)>m_release_name[0];
var.str.len = gtm_release_name_len;
ZS_VAR_EQU(&x, zversion_text);
mval_write(output, &var, TRUE);
/* SV_ZYERROR */
var.mvtype = MV_STR;
var.str = dollar_zyerror.str;
ZS_VAR_EQU(&x, zyerror_text);
mval_write(output, &var, TRUE);
}
