diff options
Diffstat (limited to 'generic/tclExecute.c')
| -rw-r--r-- | generic/tclExecute.c | 39 |
1 files changed, 24 insertions, 15 deletions
diff --git a/generic/tclExecute.c b/generic/tclExecute.c index fa19db4..cd92324 100644 --- a/generic/tclExecute.c +++ b/generic/tclExecute.c @@ -11,7 +11,7 @@ * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * - * RCS: @(#) $Id: tclExecute.c,v 1.60 2002/06/07 10:38:03 dkf Exp $ + * RCS: @(#) $Id: tclExecute.c,v 1.61 2002/06/11 12:38:22 msofer Exp $ */ #include "tclInt.h" @@ -1384,6 +1384,12 @@ TclExecuteByteCode(interp, codePtr) } case INST_EVAL_STK: + /* + * Note to maintainers: it is important that INST_EVAL_STK + * pop its argument from the stack before jumping to + * checkForCatch! DO NOT OPTIMISE! + */ + objPtr = POP_OBJECT(); DECACHE_STACK_INFO(); result = TclCompEvalObj(interp, objPtr); @@ -4775,25 +4781,28 @@ GetExceptRangeForPc(pc, catchOnly, codePtr) int numRanges = codePtr->numExceptRanges; register ExceptionRange *rangePtr; int pcOffset = (pc - codePtr->codeStart); - register int i, level; + register int start; if (numRanges == 0) { return NULL; } - rangeArrayPtr = codePtr->exceptArrayPtr; - for (level = codePtr->maxExceptDepth; level >= 0; level--) { - for (i = 0; i < numRanges; i++) { - rangePtr = &(rangeArrayPtr[i]); - if (rangePtr->nestingLevel == level) { - int start = rangePtr->codeOffset; - int end = (start + rangePtr->numCodeBytes); - if ((start <= pcOffset) && (pcOffset < end)) { - if ((!catchOnly) - || (rangePtr->type == CATCH_EXCEPTION_RANGE)) { - return rangePtr; - } - } + /* + * This exploits peculiarities of our compiler: nested ranges + * are always *after* their containing ranges, so that by scanning + * backwards we are sure that the first matching range is indeed + * the deepest. + */ + + rangeArrayPtr = codePtr->exceptArrayPtr; + rangePtr = rangeArrayPtr + numRanges; + while (--rangePtr >= rangeArrayPtr) { + start = rangePtr->codeOffset; + if ((start <= pcOffset) && + (pcOffset < (start + rangePtr->numCodeBytes))) { + if ((!catchOnly) + || (rangePtr->type == CATCH_EXCEPTION_RANGE)) { + return rangePtr; } } } |