82 lines
2.6 KiB
C
82 lines
2.6 KiB
C
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/****************************************************************
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* *
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* Copyright 2010, 2011 Fidelity Information Services, Inc *
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* *
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* This source code contains the intellectual property *
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* of its copyright holder(s), and is made available *
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* under a license. If you do not know the terms of *
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* the license, please stop and do not read further. *
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* *
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****************************************************************/
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#include "mdef.h"
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#include "gtm_stdio.h"
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#include "rtnhdr.h"
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#include "stack_frame.h"
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#include "tp_frame.h"
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#include "golevel.h"
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#include "dollar_zlevel.h"
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#include "error.h"
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GBLREF stack_frame *frame_pointer;
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#ifdef GTM_TRIGGER
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void golevel(int4 level, boolean_t unwtrigrframe)
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#else
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void golevel(int4 level)
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#endif
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{
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stack_frame *fp, *fpprev;
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int4 unwframes, unwlevels, prevlvl;
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error_def(ERR_ZGOTOTOOBIG);
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error_def(ERR_ZGOTOLTZERO);
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if (0 > level)
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rts_error(VARLSTCNT(1) ERR_ZGOTOLTZERO);
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unwlevels = dollar_zlevel() - level;
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if (0 > unwlevels)
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/* Couldn't get to the level we were trying to unwind to */
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rts_error(VARLSTCNT(1) ERR_ZGOTOTOOBIG);
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unwframes = 0;
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for (fp = frame_pointer; NULL != fp; fp = fpprev)
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{
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assert(0 <= unwlevels);
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fpprev = fp->old_frame_pointer;
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if (NULL == fpprev GTMTRIG_ONLY( && !(SFT_TRIGR & fp->type)))
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break; /* break on base frame not trigger related */
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# ifdef GTM_TRIGGER
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/* Break if level reached -- note trigger base frame is type=counted but is not counted as
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* part of level our count is not decremented on a trigger base frame.
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*/
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if (SFT_COUNT & fp->type)
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{
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if (0 == unwlevels)
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break; /* break on reaching target level with a counted frame */
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if (!(SFT_TRIGR & fp->type))
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unwlevels--;
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}
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unwframes++;
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if (SFT_TRIGR & fp->type)
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{ /* Unwinding a trigger base frame leave a null frame_pointer so allow us to jump over the
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* base frame to the rich stack beneath..
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*/
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assert(NULL == fpprev);
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fpprev = *(stack_frame **)(fp + 1);
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assert(NULL != fpprev);
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}
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# else
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if ((SFT_COUNT & fp->type) && (0 == unwlevels--))
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break; /* break on reaching target level with a counted frame */
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unwframes++;
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# endif
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}
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DBGEHND_ONLY(prevlvl = dollar_zlevel());
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GOFRAMES(unwframes, unwtrigrframe, FALSE);
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DBGEHND((stderr, "golevel: Unwound from level %d to level %d which is %d frames ending in stackframe 0x"lvaddr" with"
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" type 0x%04lx\n", prevlvl, level, unwframes, frame_pointer, (frame_pointer ? frame_pointer->type : 0xffff)));
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return;
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}
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