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authorMiguel Sofer <miguel.sofer@gmail.com>2009-12-11 05:38:11 (GMT)
committerMiguel Sofer <miguel.sofer@gmail.com>2009-12-11 05:38:11 (GMT)
commit61ace5272a2905633f2c69fc76b503e6739e6ad2 (patch)
tree69e7124f7841fc0472a7920ed6d9f3db250e1f6d
parent7e4c6f37909b4679e7ca70148d619d8059650581 (diff)
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code comments
-rw-r--r--generic/tclExecute.c25
1 files changed, 13 insertions, 12 deletions
diff --git a/generic/tclExecute.c b/generic/tclExecute.c
index c88aa73..a7952d9 100644
--- a/generic/tclExecute.c
+++ b/generic/tclExecute.c
@@ -14,7 +14,7 @@
* 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 1.464 2009/12/11 05:33:00 msofer Exp $
+ * RCS: @(#) $Id: tclExecute.c,v 1.465 2009/12/11 05:38:11 msofer Exp $
*/
#include "tclInt.h"
@@ -1962,16 +1962,6 @@ TclExecuteByteCode(
char cmdNameBuf[21];
#endif
- /*
- * The execution uses a unified stack: first a BottomData, immediately
- * above it a CmdFrame, then the catch stack, then the execution stack.
- *
- * Make sure the catch stack is large enough to hold the maximum number of
- * catch commands that could ever be executing at the same time (this will
- * be no more than the exception range array's depth). Make sure the
- * execution stack is large enough to execute this ByteCode.
- */
-
if (!codePtr) {
CoroutineData *corPtr;
@@ -2002,6 +1992,16 @@ TclExecuteByteCode(
goto returnToCaller;
}
+ /*
+ * The execution uses a unified stack: first a BottomData, immediately
+ * above it a CmdFrame, then the catch stack, then the execution stack.
+ *
+ * Make sure the catch stack is large enough to hold the maximum number of
+ * catch commands that could ever be executing at the same time (this will
+ * be no more than the exception range array's depth). Make sure the
+ * execution stack is large enough to execute this ByteCode.
+ */
+
nonRecursiveCallStart:
codePtr->refCount++;
BP = (BottomData *) GrowEvaluationStack(iPtr->execEnvPtr,
@@ -2021,7 +2021,8 @@ TclExecuteByteCode(
tosPtr = initTosPtr;
/*
- * TIP #280: Initialize the frame. Do not push it yet.
+ * TIP #280: Initialize the frame. Do not push it yet: it will be pushed
+ * every time that we call out from this BP, popped when we return to it.
*/
bcFramePtr->type = ((codePtr->flags & TCL_BYTECODE_PRECOMPILED)