diff options
Diffstat (limited to 'generic/tclExecute.c')
| -rw-r--r-- | generic/tclExecute.c | 356 |
1 files changed, 117 insertions, 239 deletions
diff --git a/generic/tclExecute.c b/generic/tclExecute.c index efdcdbb..8ff5d23 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 1.82 2002/07/24 15:40:42 msofer Exp $ + * RCS: @(#) $Id: tclExecute.c,v 1.83 2002/07/24 23:20:50 msofer Exp $ */ #include "tclInt.h" @@ -81,12 +81,6 @@ TCL_DECLARE_MUTEX(execMutex) */ int tclTraceExec = 0; - -/* - * Execution tracing temporarily disabled: WORK IN PROGRESS. - */ -#undef TCL_COMPILE_DEBUG - #endif /* @@ -242,6 +236,10 @@ long tclObjsShared[TCL_MAX_SHARED_OBJ_STATS] = { 0, 0, 0, 0, 0 }; GetOpcodeName(pc)); \ printf a; \ } +# define TRACE_APPEND(a) \ + if (traceInstructions) { \ + printf a; \ + } # define TRACE_WITH_OBJ(a, objPtr) \ if (traceInstructions) { \ fprintf(stdout, "%2d: %2d (%u) %s ", iPtr->numLevels, stackTop, \ @@ -255,6 +253,7 @@ long tclObjsShared[TCL_MAX_SHARED_OBJ_STATS] = { 0, 0, 0, 0, 0 }; (objPtr ? TclGetString(objPtr) : "") #else /* !TCL_COMPILE_DEBUG */ # define TRACE(a) +# define TRACE_APPEND(a) # define TRACE_WITH_OBJ(a, objPtr) # define O2S(objPtr) #endif /* TCL_COMPILE_DEBUG */ @@ -1047,7 +1046,7 @@ TclExecuteByteCode(interp, codePtr) /* Cached top index of evaluation stack. */ register unsigned char *pc = codePtr->codeStart; /* The current program counter. */ - int opnd; /* Current instruction's operand byte. */ + int opnd; /* Current instruction's operand byte(s). */ int pcAdjustment; /* Hold pc adjustment after instruction. */ int initStackTop = stackTop;/* Stack top at start of execution. */ ExceptionRange *rangePtr; /* Points to closest loop or catch exception @@ -1056,10 +1055,6 @@ TclExecuteByteCode(interp, codePtr) * process break, continue, and errors. */ int result = TCL_OK; /* Return code returned after execution. */ int storeFlags; -#ifdef TCL_COMPILE_DEBUG - int traceInstructions = (tclTraceExec == 3); - char cmdNameBuf[21]; -#endif Tcl_Obj *valuePtr, *value2Ptr, *objPtr; char *bytes; int length; @@ -1072,6 +1067,10 @@ TclExecuteByteCode(interp, codePtr) char *part1, *part2; Var *varPtr, *arrayPtr; CallFrame *varFramePtr = iPtr->varFramePtr; +#ifdef TCL_COMPILE_DEBUG + int traceInstructions = (tclTraceExec == 3); + char cmdNameBuf[21]; +#endif /* * This procedure uses a stack to hold information about catch commands. @@ -1091,6 +1090,7 @@ TclExecuteByteCode(interp, codePtr) fprintf(stdout, " Starting stack top=%d\n", eePtr->stackTop); fflush(stdout); } + opnd = 0; /* Init. avoids compiler warning. */ #endif #ifdef TCL_COMPILE_STATS @@ -1211,9 +1211,9 @@ TclExecuteByteCode(interp, codePtr) valuePtr = stackPtr[stackTop]; Tcl_SetObjResult(interp, valuePtr); +#ifdef TCL_COMPILE_DEBUG TRACE_WITH_OBJ(("=> return code=%d, result=", result), iPtr->objResultPtr); -#ifdef TCL_COMPILE_DEBUG if (traceInstructions) { fprintf(stdout, "\n"); } @@ -1397,7 +1397,7 @@ TclExecuteByteCode(interp, codePtr) * with the next instruction. */ - TRACE_WITH_OBJ(("%u => ...after \"%.20s\", result=", + TRACE_WITH_OBJ(("%u => ... after \"%.20s\": TCL_OK, result=", objc, cmdNameBuf), Tcl_GetObjResult(interp)); objResultPtr = Tcl_GetObjResult(interp); @@ -1464,13 +1464,14 @@ TclExecuteByteCode(interp, codePtr) while (TclIsVarLink(varPtr)) { varPtr = varPtr->value.linkPtr; } + TRACE(("%u => ", opnd)); if (TclIsVarScalar(varPtr) && !TclIsVarUndefined(varPtr) && (varPtr->tracePtr == NULL)) { /* * No errors, no traces: just get the value. */ - objResultPtr = varPtr->value.objPtr; - TRACE_WITH_OBJ(("%u => ", opnd), objResultPtr); + objResultPtr = varPtr->value.objPtr; + TRACE_APPEND(("%.30s\n", O2S(objResultPtr))); NEXT_INST_F(2, 0, 1); } pcAdjustment = 2; @@ -1486,13 +1487,14 @@ TclExecuteByteCode(interp, codePtr) while (TclIsVarLink(varPtr)) { varPtr = varPtr->value.linkPtr; } + TRACE(("%u => ", opnd)); if (TclIsVarScalar(varPtr) && !TclIsVarUndefined(varPtr) && (varPtr->tracePtr == NULL)) { /* * No errors, no traces: just get the value. */ objResultPtr = varPtr->value.objPtr; - TRACE_WITH_OBJ(("%u => ", opnd), objResultPtr); + TRACE_APPEND(("%.30s\n", O2S(objResultPtr))); NEXT_INST_F(5, 0, 1); } pcAdjustment = 5; @@ -1505,6 +1507,7 @@ TclExecuteByteCode(interp, codePtr) cleanup = 2; part2 = Tcl_GetString(stackPtr[stackTop]); /* element name */ objPtr = stackPtr[stackTop-1]; /* array name */ + TRACE(("\"%.30s(%.30s)\" => ", O2S(objPtr), part2)); goto doLoadStk; case INST_LOAD_STK: @@ -1512,6 +1515,7 @@ TclExecuteByteCode(interp, codePtr) cleanup = 1; part2 = NULL; objPtr = stackPtr[stackTop]; /* variable name */ + TRACE(("\"%.30s\" => ", O2S(objPtr))); doLoadStk: part1 = TclGetString(objPtr); @@ -1520,6 +1524,7 @@ TclExecuteByteCode(interp, codePtr) /*createPart1*/ 0, /*createPart2*/ 1, &arrayPtr); if (varPtr == NULL) { + TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp)))); result = TCL_ERROR; goto checkForCatch; } @@ -1531,6 +1536,7 @@ TclExecuteByteCode(interp, codePtr) * No errors, no traces: just get the value. */ objResultPtr = varPtr->value.objPtr; + TRACE_APPEND(("%.30s\n", O2S(objResultPtr))); NEXT_INST_V(1, cleanup, 1); } pcAdjustment = 1; @@ -1552,9 +1558,11 @@ TclExecuteByteCode(interp, codePtr) while (TclIsVarLink(arrayPtr)) { arrayPtr = arrayPtr->value.linkPtr; } + TRACE(("%u \"%.30s\" => ", opnd, part2)); varPtr = TclLookupArrayElement(interp, part1, part2, TCL_LEAVE_ERR_MSG, "read", 0, 1, arrayPtr); if (varPtr == NULL) { + TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp)))); result = TCL_ERROR; goto checkForCatch; } @@ -1566,6 +1574,7 @@ TclExecuteByteCode(interp, codePtr) * No errors, no traces: just get the value. */ objResultPtr = varPtr->value.objPtr; + TRACE_APPEND(("%.30s\n", O2S(objResultPtr))); NEXT_INST_F(pcAdjustment, 1, 1); } cleanup = 1; @@ -1582,9 +1591,11 @@ TclExecuteByteCode(interp, codePtr) part2, TCL_LEAVE_ERR_MSG); CACHE_STACK_INFO(); if (objResultPtr == NULL) { + TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp)))); result = TCL_ERROR; goto checkForCatch; } + TRACE_APPEND(("%.30s\n", O2S(objResultPtr))); NEXT_INST_V(pcAdjustment, cleanup, 1); /* @@ -1642,11 +1653,21 @@ TclExecuteByteCode(interp, codePtr) doStoreStk: objPtr = stackPtr[stackTop - 1 - (part2 != NULL)]; /* variable name */ part1 = TclGetString(objPtr); +#ifdef TCL_COMPILE_DEBUG + if (part2 == NULL) { + TRACE(("\"%.30s\" <- \"%.30s\" =>", + part1, O2S(valuePtr))); + } else { + TRACE(("\"%.30s(%.30s)\" <- \"%.30s\" => ", + part1, part2, O2S(valuePtr))); + } +#endif varPtr = TclObjLookupVar(interp, objPtr, part2, TCL_LEAVE_ERR_MSG, "set", /*createPart1*/ 1, /*createPart2*/ 1, &arrayPtr); if (varPtr == NULL) { + TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp)))); result = TCL_ERROR; goto checkForCatch; } @@ -1696,12 +1717,15 @@ TclExecuteByteCode(interp, codePtr) part2 = TclGetString(stackPtr[stackTop - 1]); arrayPtr = &(varFramePtr->compiledLocals[opnd]); part1 = arrayPtr->name; + TRACE(("%u \"%.30s\" <- \"%.30s\" => ", + opnd, part2, O2S(valuePtr))); while (TclIsVarLink(arrayPtr)) { arrayPtr = arrayPtr->value.linkPtr; } varPtr = TclLookupArrayElement(interp, part1, part2, TCL_LEAVE_ERR_MSG, "set", 1, 1, arrayPtr); if (varPtr == NULL) { + TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp)))); result = TCL_ERROR; goto checkForCatch; } @@ -1749,6 +1773,7 @@ TclExecuteByteCode(interp, codePtr) valuePtr = stackPtr[stackTop]; varPtr = &(varFramePtr->compiledLocals[opnd]); part1 = varPtr->name; + TRACE(("%u <- \"%.30s\" => ", opnd, O2S(valuePtr))); while (TclIsVarLink(varPtr)) { varPtr = varPtr->value.linkPtr; } @@ -1782,9 +1807,13 @@ TclExecuteByteCode(interp, codePtr) varPtr->value.objPtr = objResultPtr; Tcl_IncrRefCount(objResultPtr); } +#ifndef TCL_COMPILE_DEBUG if (*(pc+pcAdjustment) == INST_POP) { NEXT_INST_V((pcAdjustment+1), cleanup, 0); } +#else + TRACE_APPEND(("%.30s\n", O2S(objResultPtr))); +#endif NEXT_INST_V(pcAdjustment, cleanup, 1); } else { DECACHE_STACK_INFO(); @@ -1792,13 +1821,17 @@ TclExecuteByteCode(interp, codePtr) part1, part2, valuePtr, storeFlags); CACHE_STACK_INFO(); if (objResultPtr == NULL) { + TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp)))); result = TCL_ERROR; goto checkForCatch; } } +#ifndef TCL_COMPILE_DEBUG if (*(pc+pcAdjustment) == INST_POP) { NEXT_INST_V((pcAdjustment+1), cleanup, 0); } +#endif + TRACE_APPEND(("%.30s\n", O2S(objResultPtr))); NEXT_INST_V(pcAdjustment, cleanup, 1); @@ -1863,16 +1896,21 @@ TclExecuteByteCode(interp, codePtr) || (*pc == INST_INCR_ARRAY_STK)) { part2 = TclGetString(stackPtr[stackTop]); objPtr = stackPtr[stackTop - 1]; + TRACE(("\"%.30s(%.30s)\" (by %ld) => ", + O2S(objPtr), part2, i)); } else { part2 = NULL; objPtr = stackPtr[stackTop]; + TRACE(("\"%.30s\" (by %ld) => ", O2S(objPtr), i)); } part1 = TclGetString(objPtr); + varPtr = TclObjLookupVar(interp, objPtr, part2, TCL_LEAVE_ERR_MSG, "read", 0, 1, &arrayPtr); if (varPtr == NULL) { Tcl_AddObjErrorInfo(interp, "\n (reading value of variable to increment)", -1); + TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp)))); result = TCL_ERROR; goto checkForCatch; } @@ -1891,11 +1929,12 @@ TclExecuteByteCode(interp, codePtr) while (TclIsVarLink(arrayPtr)) { arrayPtr = arrayPtr->value.linkPtr; } + TRACE(("%u \"%.30s\" (by %ld) => ", + opnd, part2, i)); varPtr = TclLookupArrayElement(interp, part1, part2, TCL_LEAVE_ERR_MSG, "read", 0, 1, arrayPtr); if (varPtr == NULL) { - Tcl_AddObjErrorInfo(interp, - "\n (reading value of variable to increment)", -1); + TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp)))); result = TCL_ERROR; goto checkForCatch; } @@ -1916,6 +1955,8 @@ TclExecuteByteCode(interp, codePtr) arrayPtr = NULL; part2 = NULL; cleanup = 0; + TRACE(("%u %ld => ", opnd, i)); + doIncrVar: objPtr = varPtr->value.objPtr; @@ -1940,19 +1981,24 @@ TclExecuteByteCode(interp, codePtr) Tcl_SetLongObj(objPtr, i); objResultPtr = objPtr; } + TRACE_APPEND(("%.30s\n", O2S(objResultPtr))); } else { DECACHE_STACK_INFO(); objResultPtr = TclPtrIncrVar(interp, varPtr, arrayPtr, part1, part2, i, TCL_LEAVE_ERR_MSG); CACHE_STACK_INFO(); if (objResultPtr == NULL) { + TRACE_APPEND(("ERROR: %.30s\n", O2S(Tcl_GetObjResult(interp)))); result = TCL_ERROR; goto checkForCatch; } } + TRACE_APPEND(("%.30s\n", O2S(objResultPtr))); +#ifndef TCL_COMPILE_DEBUG if (*(pc+pcAdjustment) == INST_POP) { NEXT_INST_V((pcAdjustment+1), cleanup, 0); } +#endif NEXT_INST_V(pcAdjustment, cleanup, 1); /* @@ -2372,6 +2418,7 @@ TclExecuteByteCode(interp, codePtr) */ pc++; +#ifndef TCL_COMPILE_DEBUG switch (*pc) { case INST_JUMP_FALSE1: NEXT_INST_F((iResult? 2 : TclGetInt1AtPtr(pc+1)), 2, 0); @@ -2382,6 +2429,7 @@ TclExecuteByteCode(interp, codePtr) case INST_JUMP_TRUE4: NEXT_INST_F((iResult? TclGetInt4AtPtr(pc+1) : 5), 2, 0); } +#endif objResultPtr = Tcl_NewIntObj(iResult); NEXT_INST_F(0, 2, 1); } @@ -2785,6 +2833,7 @@ TclExecuteByteCode(interp, codePtr) */ pc++; +#ifndef TCL_COMPILE_DEBUG switch (*pc) { case INST_JUMP_FALSE1: NEXT_INST_F((iResult? 2 : TclGetInt1AtPtr(pc+1)), 2, 0); @@ -2795,6 +2844,7 @@ TclExecuteByteCode(interp, codePtr) case INST_JUMP_TRUE4: NEXT_INST_F((iResult? TclGetInt4AtPtr(pc+1) : 5), 2, 0); } +#endif objResultPtr = Tcl_NewIntObj(iResult); NEXT_INST_F(0, 2, 1); } @@ -3749,13 +3799,17 @@ TclExecuteByteCode(interp, codePtr) opnd, iterTmpIndex)); } +#ifndef TCL_COMPILE_DEBUG /* * Remark that the compiler ALWAYS sets INST_FOREACH_STEP4 immediately * after INST_FOREACH_START4 - let us just fall through instead of - * ADJUST_PC(5); + * jumping back to the top. */ + pc += 5; - +#else + NEXT_INST_F(5, 0, 0); +#endif case INST_FOREACH_STEP4: opnd = TclGetUInt4AtPtr(pc+1); { @@ -3946,13 +4000,33 @@ TclExecuteByteCode(interp, codePtr) */ processExceptionReturn: -#ifndef TCL_COMPILE_DEBUG +#if TCL_COMPILE_DEBUG + switch (*pc) { + case INST_INVOKE_STK1: + case INST_INVOKE_STK4: + TRACE(("%u => ... after \"%.20s\": ", opnd, cmdNameBuf)); + break; + case INST_EVAL_STK: + /* + * Note that the object at stacktop has to be used + * before doing the cleanup. + */ + + TRACE(("\"%.30s\" => ", O2S(stackPtr[stackTop]))); + break; + default: + TRACE(("=> ")); + } +#endif if ((result == TCL_CONTINUE) || (result == TCL_BREAK)) { rangePtr = GetExceptRangeForPc(pc, /*catchOnly*/ 0, codePtr); if (rangePtr == NULL) { - goto checkForCatch; + TRACE_APPEND(("no encl. loop or catch, returning %s\n", + StringForResultCode(result))); + goto abnormalReturn; } if (rangePtr->type == CATCH_EXCEPTION_RANGE) { + TRACE_APPEND(("%s ...\n", StringForResultCode(result))); goto processCatch; } while (cleanup--) { @@ -3962,233 +4036,37 @@ TclExecuteByteCode(interp, codePtr) if (result == TCL_BREAK) { result = TCL_OK; pc = (codePtr->codeStart + rangePtr->breakOffset); + TRACE_APPEND(("%s, range at %d, new pc %d\n", + StringForResultCode(result), + rangePtr->codeOffset, rangePtr->breakOffset)); NEXT_INST_F(0, 0, 0); } else { if (rangePtr->continueOffset == -1) { + TRACE_APPEND(("%s, loop w/o continue, checking for catch\n", + StringForResultCode(result))); goto checkForCatch; } result = TCL_OK; pc = (codePtr->codeStart + rangePtr->continueOffset); + TRACE_APPEND(("%s, range at %d, new pc %d\n", + StringForResultCode(result), + rangePtr->codeOffset, rangePtr->continueOffset)); NEXT_INST_F(0, 0, 0); } - } - -#else /* TCL_COMPILE_DEBUG is set! */ - /* - * ******************************************************** - * This code has been cut/pasted from the previous version; - * it still needs to be updated to the new flow model. - * ******************************************************** - */ - - /* - * Error messages depend on the instruction. - */ - - switch(*pc) { - int newPcOffset; - case INST_INVOKE_STK1: - case INST_INVOKE_STK4: - /* - * Process the result of the Tcl_ObjCmdProc call. - */ - - switch (result) { - case TCL_BREAK: - case TCL_CONTINUE: - /* - * The invoked command requested a break or continue. - * Find the closest enclosing loop or catch exception - * range, if any. If a loop is found, terminate its - * execution or skip to its next iteration. If the - * closest is a catch exception range, jump to its - * catchOffset. If no enclosing range is found, stop - * execution and return the TCL_BREAK or TCL_CONTINUE. - */ - rangePtr = GetExceptRangeForPc(pc, /*catchOnly*/ 0, - codePtr); - if (rangePtr == NULL) { - TRACE(("%u => ... after \"%.20s\", no encl. loop or catch, returning %s\n", - opnd, cmdNameBuf, StringForResultCode(result))); - goto abnormalReturn; /* no catch exists to check */ - } - switch (rangePtr->type) { - case LOOP_EXCEPTION_RANGE: - if (result == TCL_BREAK) { - newPcOffset = rangePtr->breakOffset; - } else if (rangePtr->continueOffset == -1) { - TRACE(("%u => ... after \"%.20s\", %s, loop w/o continue, checking for catch\n", - opnd, cmdNameBuf, StringForResultCode(result))); - goto checkForCatch; - } else { - newPcOffset = rangePtr->continueOffset; - } - TRACE(("%u => ... after \"%.20s\", %s, range at %d, new pc %d\n", - opnd, cmdNameBuf, StringForResultCode(result), - rangePtr->codeOffset, newPcOffset)); - break; - case CATCH_EXCEPTION_RANGE: - TRACE(("%u => ... after \"%.20s\", %s...\n", - opnd, cmdNameBuf, StringForResultCode(result))); - goto processCatch; /* it will use rangePtr */ - default: - newPcOffset = 0; /* avoid compiler warning */ - panic("TclExecuteByteCode: bad ExceptionRange type\n"); - } - result = TCL_OK; - pc = (codePtr->codeStart + newPcOffset); - continue; /* restart outer instruction loop at pc */ - - case TCL_ERROR: - /* - * The invoked command returned an error. Look for an - * enclosing catch exception range, if any. - */ - TRACE_WITH_OBJ(("%u => ... after \"%.20s\", TCL_ERROR ", - opnd, cmdNameBuf), Tcl_GetObjResult(interp)); - goto checkForCatch; - - case TCL_RETURN: - /* - * The invoked command requested that the current - * procedure stop execution and return. First check - * for an enclosing catch exception range, if any. - */ - TRACE(("%u => ... after \"%.20s\", TCL_RETURN\n", - opnd, cmdNameBuf)); - goto checkForCatch; - - default: - TRACE_WITH_OBJ(("%u => ... after \"%.20s\", OTHER RETURN CODE %d ", - opnd, cmdNameBuf, result), Tcl_GetObjResult(interp)); - goto checkForCatch; - } - case INST_EVAL_STK: - if ((result == TCL_BREAK) || (result == TCL_CONTINUE)) { - /* - * Find the closest enclosing loop or catch exception range, - * if any. If a loop is found, terminate its execution or - * skip to its next iteration. If the closest is a catch - * exception range, jump to its catchOffset. If no enclosing - * range is found, stop execution and return that same - * TCL_BREAK or TCL_CONTINUE. - */ - - int newPcOffset = 0; /* Pc offset computed during break, - * continue, error processing. Init. - * to avoid compiler warning. */ - - rangePtr = GetExceptRangeForPc(pc, /*catchOnly*/ 0, - codePtr); - if (rangePtr == NULL) { - TRACE(("\"%.30s\" => no encl. loop or catch, returning %s\n", - O2S(objPtr), StringForResultCode(result))); - TclDecrRefCount(objPtr); - goto abnormalReturn; /* no catch exists to check */ - } - switch (rangePtr->type) { - case LOOP_EXCEPTION_RANGE: - if (result == TCL_BREAK) { - newPcOffset = rangePtr->breakOffset; - } else if (rangePtr->continueOffset == -1) { - TRACE(("\"%.30s\" => %s, loop w/o continue, checking for catch\n", - O2S(objPtr), StringForResultCode(result))); - TclDecrRefCount(objPtr); - goto checkForCatch; - } else { - newPcOffset = rangePtr->continueOffset; - } - result = TCL_OK; - TRACE(("\"%.30s\" => %s, range at %d, new pc %d ", - O2S(objPtr), StringForResultCode(result), - rangePtr->codeOffset, newPcOffset)); - break; - case CATCH_EXCEPTION_RANGE: - TRACE(("\"%.30s\" => %s ", - O2S(objPtr), StringForResultCode(result))); - TclDecrRefCount(objPtr); - goto processCatch; /* it will use rangePtr */ - default: - panic("TclExecuteByteCode: unrecognized ExceptionRange type %d\n", rangePtr->type); - } - TclDecrRefCount(objPtr); - pc = (codePtr->codeStart + newPcOffset); - continue; /* restart outer instruction loop at pc */ - } else { /* eval returned TCL_ERROR, TCL_RETURN, unknown code */ - TRACE_WITH_OBJ(("\"%.30s\" => ERROR: ", O2S(objPtr)), - Tcl_GetObjResult(interp)); - TclDecrRefCount(objPtr); - goto checkForCatch; - } - - case INST_BREAK: - /* - * First reset the interpreter's result. Then find the closest - * enclosing loop or catch exception range, if any. If a loop is - * found, terminate its execution. If the closest is a catch - * exception range, jump to its catchOffset. If no enclosing - * range is found, stop execution and return TCL_BREAK. - */ - - rangePtr = GetExceptRangeForPc(pc, /*catchOnly*/ 0, codePtr); - if (rangePtr == NULL) { - TRACE(("=> no encl. loop or catch, returning TCL_BREAK\n")); - goto abnormalReturn; /* no catch exists to check */ - } - switch (rangePtr->type) { - case LOOP_EXCEPTION_RANGE: - result = TCL_OK; - TRACE(("=> range at %d, new pc %d\n", - rangePtr->codeOffset, rangePtr->breakOffset)); - break; - case CATCH_EXCEPTION_RANGE: - TRACE(("=> ...\n")); - goto processCatch; /* it will use rangePtr */ - default: - panic("TclExecuteByteCode: unrecognized ExceptionRange type %d\n", rangePtr->type); - } - pc = (codePtr->codeStart + rangePtr->breakOffset); - continue; /* restart outer instruction loop at pc */ - - case INST_CONTINUE: - /* - * Find the closest enclosing loop or catch exception range, - * if any. If a loop is found, skip to its next iteration. - * If the closest is a catch exception range, jump to its - * catchOffset. If no enclosing range is found, stop - * execution and return TCL_CONTINUE. - */ - - Tcl_ResetResult(interp); - rangePtr = GetExceptRangeForPc(pc, /*catchOnly*/ 0, codePtr); - if (rangePtr == NULL) { - TRACE(("=> no encl. loop or catch, returning TCL_CONTINUE\n")); - result = TCL_CONTINUE; - goto abnormalReturn; - } - switch (rangePtr->type) { - case LOOP_EXCEPTION_RANGE: - if (rangePtr->continueOffset == -1) { - TRACE(("=> loop w/o continue, checking for catch\n")); - goto checkForCatch; - } else { - result = TCL_OK; - TRACE(("=> range at %d, new pc %d\n", - rangePtr->codeOffset, rangePtr->continueOffset)); - } - break; - case CATCH_EXCEPTION_RANGE: - result = TCL_CONTINUE; - TRACE(("=> ...\n")); - goto processCatch; /* it will use rangePtr */ - default: - panic("TclExecuteByteCode: unrecognized ExceptionRange type %d\n", rangePtr->type); +#if TCL_COMPILE_DEBUG + } else if (traceInstructions) { + if ((result != TCL_ERROR) && (result != TCL_RETURN)) { + objPtr = Tcl_GetObjResult(interp); + TRACE_APPEND(("OTHER RETURN CODE %d, result= \"%s\"\n ", + result, O2S(objPtr))); + } else { + objPtr = Tcl_GetObjResult(interp); + TRACE_APPEND(("%s, result= \"%s\"\n", + StringForResultCode(result), O2S(objPtr))); } - pc = (codePtr->codeStart + rangePtr->continueOffset); - continue; /* restart outer instruction loop at pc */ +#endif } -#endif /* TCL_COMPILE_DEBUG */ - + /* * Execution has generated an "exception" such as TCL_ERROR. If the * exception is an error, record information about what was being |