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240 lines
9.4 KiB
C++
240 lines
9.4 KiB
C++
// -*- c-basic-offset: 2 -*-
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/*
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* This file is part of the KDE libraries
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* Copyright (C) 1999-2001 Harri Porten (porten@kde.org)
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* Copyright (C) 2001 Peter Kelly (pmk@post.com)
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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#ifndef _KJSDEBUGGER_H_
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#define _KJSDEBUGGER_H_
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#include "global.h"
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#include <wtf/HashMap.h>
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#include "protect.h"
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namespace KJS {
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class DebuggerImp;
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class Interpreter;
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class ExecState;
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class JSObject;
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class JSValue;
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class UString;
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class List;
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class FunctionBodyNode;
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/**
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* @internal
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*
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* Provides an interface which receives notification about various
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* script-execution related events such as statement execution and function
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* calls.
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*
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* WARNING: This interface is still a work in progress and is not yet
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* officially publicly available. It is likely to change in binary incompatible
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* (and possibly source incompatible) ways in future versions. It is
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* anticipated that at some stage the interface will be frozen and made
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* available for general use.
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*/
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class KJS_EXPORT Debugger {
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public:
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/**
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* Creates a new debugger
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*/
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Debugger();
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/**
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* Destroys the debugger. If the debugger is attached to any interpreters,
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* it is automatically detached.
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*/
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virtual ~Debugger();
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DebuggerImp *imp() const { return rep; }
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/**
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* Attaches the debugger to specified interpreter. This will cause this
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* object to receive notification of events from the interpreter.
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*
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* If the interpreter is deleted, the debugger will automatically be
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* detached.
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*
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* Note: only one debugger can be attached to an interpreter at a time.
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* Attaching another debugger to the same interpreter will cause the
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* original debugger to be detached from that interpreter.
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*
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* @param interp The interpreter to attach to
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*
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* @see detach()
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*/
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virtual void attach(Interpreter *interp);
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/**
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* Detach the debugger from an interpreter
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*
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* @param interp The interpreter to detach from. If 0, the debugger will be
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* detached from all interpreters to which it is attached.
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*
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* @see attach()
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*/
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virtual void detach(Interpreter *interp);
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/**
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* Called to notify the debugger that some javascript source code has
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* been parsed. For calls to Interpreter::evaluate(), this will be called
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* with the supplied source code before any other code is parsed.
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* Other situations in which this may be called include creation of a
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* function using the Function() constructor, or the eval() function.
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*
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* The default implementation does nothing. Override this method if
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* you want to process this event.
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*
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* @param exec The current execution state
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* @param sourceId The ID of the source code (corresponds to the
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* sourceId supplied in other functions such as atStatement()
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* @param sourceURL Where the source code that was parsed came from
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* @param source The source code that was parsed
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* @param startingLineNumber The line number at which parsing started
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* @param errorLine The line number at which parsing encountered an
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* error, or -1 if the source code was valid and parsed successfully
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* @param errorMsg The error description, or null if the source code
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was valid and parsed successfully
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* @return true if execution should be continue, false if it should
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* be aborted
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*/
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virtual bool sourceParsed(ExecState *exec, int sourceId, const UString &sourceURL,
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const UString &source, int startingLineNumber, int errorLine, const UString &errorMsg);
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/**
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* Called when an exception is thrown during script execution.
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*
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* The default implementation does nothing. Override this method if
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* you want to process this event.
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*
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* @param exec The current execution state
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* @param sourceId The ID of the source code being executed
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* @param lineno The line at which the error occurred
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* @param exception The exception object
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* @return true if execution should be continue, false if it should
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* be aborted
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*/
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virtual bool exception(ExecState *exec, int sourceId, int lineno,
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JSValue *exception);
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bool hasHandledException(ExecState *, JSValue *);
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/**
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* Called when a line of the script is reached (before it is executed)
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*
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* The default implementation does nothing. Override this method if
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* you want to process this event.
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*
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* @param exec The current execution state
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* @param sourceId The ID of the source code being executed
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* @param firstLine The starting line of the statement that is about to be
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* executed
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* @param lastLine The ending line of the statement that is about to be
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* executed (usually the same as firstLine)
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* @return true if execution should be continue, false if it should
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* be aborted
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*/
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virtual bool atStatement(ExecState *exec, int sourceId, int firstLine,
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int lastLine);
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/**
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* Called when the interpreter enters a new execution context (stack
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* frame). This can happen in three situations:
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*
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* <ul>
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* <li>A call to Interpreter::evaluate(). This has a codeType of
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* GlobalCode </li>
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* <li>A call to the builtin eval() function. The sourceId corresponds to
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* the code passed in to eval. This has a codeType of EvalCode. The
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* lineno here is always 0 since execution starts at the beginning of
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* the script.</li>
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* <li>A function call. This only occurs for functions defined in
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* ECMAScript code, whether via the normal function() { ... } syntax or
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* a call to the built-in Function() constructor (anonymous functions).
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* In the former case, the sourceId and lineno indicate the location at
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* which the function was defined. For anonymous functions, the sourceId
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* corresponds to the code passed into the Function() constructor.</li>
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* </ul>
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*
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* enterContext() is not called for functions implemented in the native
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* code, since these do not use an execution context.
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*
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* @param exec The current execution state (corresponding to the new stack)
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* @param sourceId The ID of the source code being executed
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* @param lineno The line that is about to be executed
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* @param function The function being called. 0 in non-function context.
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* @param args The arguments that were passed to the function
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* line is being executed. Empty in non-function contexts.
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*
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* @return true if execution should be continued, false if it should
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* be aborted
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*/
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virtual bool enterContext(ExecState *exec, int sourceId, int lineno,
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JSObject *function, const List &args);
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/**
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* Called when the inteprreter exits an execution context. This always
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* corresponds to a previous call to enterContext()
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*
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* The default implementation does nothing. Override this method if
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* you want to process this event.
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*
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* @param exec The current execution state
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* @param sourceId The ID of the source code being executed
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* @param lineno The line that is about to be executed
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* @param function The function being returned from, if there is one
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* @return true if execution should be continue, false if it should
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* be aborted
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*/
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virtual bool exitContext(ExecState *exec, int sourceId, int lineno,
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JSObject *function);
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// Override this and return true if you want the debugger to report
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// pretty-printed versions of the source.
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virtual bool shouldReindentSources() const;
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// Override this to return true if the debugger should report
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// exceptions even if there is a try block waiting for it.
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virtual bool shouldReportCaught() const;
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// The two methods below call the events but also keep track/use of line # information
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// so we can associate it with exceptions
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void reportAtStatement(ExecState *exec, int sourceId, int firstLine, int lastLine);
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void reportException (ExecState *exec, JSValue *exception);
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// This notifies the debugger of source being parsed, reindenting it if need be.
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void reportSourceParsed(ExecState *exec, FunctionBodyNode *body, int sourceId, UString sourceURL,
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const UString &source, int startingLineNumber, int errorLine, const UString &errorMsg);
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private:
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DebuggerImp *rep;
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HashMap<Interpreter*, ProtectedPtr<JSValue> > latestExceptions;
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int lastLineRan;
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int lastSourceParsed; // Needed for attributing syntax exceptions at top-level
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public:
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static int debuggersPresent;
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};
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}
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#endif
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// kate: indent-width 4; replace-tabs on; tab-width 4; space-indent on;
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