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/***************************************************************************
debug.c - main functions for debugger use
-------------------
begin : Fri Nov 2 2001
copyright : (C) 2001 by Keith Isdale
email : k_isdale@tpg.com.au
***************************************************************************/
#include "xsldbg.h"
#include "debug.h"
#include "debugXSL.h" /* needed for debugXSLBreak function */
#include "breakpoint.h"
#include "callstack.h"
#include "files.h"
#include "options.h"
#include <libxslt/xsltutils.h> /* need for breakpoint callback support */
/* setup debugger callbacks */
struct DebuggerCallbacks {
xsltHandleDebuggerCallback debuggercallback;
xsltAddCallCallback addcallback;
xsltDropCallCallback dropcallback;
} debuggerDriver;
/* -----------------------------------------
Private functions
-------------------------------------------*/
/**
* debugHandleDebugger:
* @cur : source node being executed
* @node : data node being processed
* @templ : temlate that applies to node
* @ctxt : the xslt transform context
*
* If either cur or node are a breakpoint, or xslDebugStatus in state
* where debugging must occcur at this time, then transfer control
* to the debugXSLBreak function
*/
void debugHandleDebugger(xmlNodePtr cur, xmlNodePtr node,
xsltTemplatePtr templ,
xsltTransformContextPtr ctxt);
/* -------------------------------------
End private functions
---------------------------------------*/
/*-----------------------------------------------------------
Main debugger functions
-----------------------------------------------------------*/
/**
* debugInit :
*
* Initialize debugger
* Returns 1 on success,
* 0 otherwise
*/
int
debugInit(void)
{
int result;
xslDebugStatus = DEBUG_NONE;
result = breakPointInit();
result = result && callStackInit();
/* setup debugger callbacks */
debuggerDriver.debuggercallback = debugHandleDebugger;
debuggerDriver.addcallback = callStackAdd;
debuggerDriver.dropcallback = callStackDrop;
xsltSetDebuggerCallbacks(3, &debuggerDriver);
return result;
}
/**
* debugFree :
*
* Free up any memory taken by debugging
*/
void
debugFree(void)
{
breakPointFree();
callStackFree();
}
/**
* debugGotControl:
* @reached: 1 if debugger has received control, -1 to read its value,
0 to clear the flag
*
* Set flag that debugger has received control to value of @reached
*
* Returns 1 if any break point was reached previously,
* 0 otherwise
*/
int
debugGotControl(int reached)
{
static int hasReached;
int result = hasReached;
if (reached != -1)
hasReached = reached;
return result;
}
/**
* debugHandleDebugger:
* @cur : source node being executed
* @node : data node being processed
* @templ : temlate that applies to node
* @ctxt : the xslt transform context
*
* If either cur or node are a breakpoint, or xslDebugStatus in state
* where debugging must occcur at this time then transfer control
* to the debugXSLBreak function
*/
void
debugHandleDebugger(xmlNodePtr cur, xmlNodePtr node,
xsltTemplatePtr templ, xsltTransformContextPtr ctxt)
{
if (!cur && !node) {
xsldbgGenericErrorFunc(i18n("Error: XSLT source and XML data are empty. Cannot enter the debugger.\n"));
} else {
if (optionsGetIntOption(OPTIONS_GDB)){
int doValidation = 0;
switch(xsldbgValidateBreakpoints){
case BREAKPOINTS_ARE_VALID:
if (!filesGetStylesheet() || !filesGetMainDoc()) {
xsldbgValidateBreakpoints = BREAKPOINTS_NEED_VALIDATION;
doValidation = 1;
}
break;
case BREAKPOINTS_NEED_VALIDATION:
if (filesGetStylesheet() && filesGetMainDoc() && templ){
xsldbgValidateBreakpoints = BREAKPOINTS_BEING_VALIDATED;
doValidation = 1;
}
break;
case BREAKPOINTS_BEING_VALIDATED:
/*should never be in the state for any length of time */
#ifdef WITH_XSLDBG_DEBUG_BREAKPOINTS
xsltGenericError(xsltGenericErrorContext,
"Error: Unexpected breakpoint validation state %d", xsldbgValidateBreakpoints);
#endif
break;
}
if (doValidation){
/* breakpoints will either be marked as orphaned or not as needed */
xsldbgValidateBreakpoints = BREAKPOINTS_BEING_VALIDATED;
walkBreakPoints((xmlHashScanner)
xslDbgShellValidateBreakPoint, ctxt);
if (filesGetStylesheet() && filesGetMainDoc() && templ){
xsldbgValidateBreakpoints = BREAKPOINTS_ARE_VALID;
}else{
xsldbgValidateBreakpoints = BREAKPOINTS_NEED_VALIDATION;
}
}
}
switch (xslDebugStatus) {
/* A temparary stopping point */
case DEBUG_WALK:
case DEBUG_TRACE:
/* only allow breakpoints at xml elements */
if (xmlGetLineNo(cur) != -1)
debugXSLBreak(cur, node, templ, ctxt);
break;
case DEBUG_STOP:
xslDebugStatus = DEBUG_CONT;
/* only allow breakpoints at xml elements */
if (xmlGetLineNo(cur) != -1)
debugXSLBreak(cur, node, templ, ctxt);
break;
case DEBUG_STEP:
/* only allow breakpoints at xml elements */
if (xmlGetLineNo(cur) != -1)
debugXSLBreak(cur, node, templ, ctxt);
break;
case DEBUG_CONT:
{
breakPointPtr breakPtr = NULL;
xmlChar *baseUri = NULL;
if (cur) {
breakPtr =
breakPointGet(cur->doc->URL,
xmlGetLineNo(cur));
if (breakPtr && (breakPtr->flags & BREAKPOINT_ENABLED) ){
debugXSLBreak(cur, node, templ, ctxt);
return;
}
}
if (node) {
baseUri = filesGetBaseUri(node);
if (baseUri != NULL) {
breakPtr =
breakPointGet(baseUri, xmlGetLineNo(node));
} else {
breakPtr =
breakPointGet(node->doc->URL,
xmlGetLineNo(node));
}
if (breakPtr) {
if (breakPtr->flags & BREAKPOINT_ENABLED) {
debugXSLBreak(cur, node, templ, ctxt);
}
}
if (baseUri)
xmlFree(baseUri);
}
}
break;
}
}
}
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