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/* $Id: DBGCCmdWorkers.cpp $ */
/** @file
* DBGC - Debugger Console, Command Worker Routines.
*/
/*
* Copyright (C) 2006-2020 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_DBGC
#include <VBox/dbg.h>
#include <VBox/vmm/dbgf.h>
#include <VBox/param.h>
#include <VBox/err.h>
#include <VBox/log.h>
#include <iprt/alloc.h>
#include <iprt/string.h>
#include <iprt/assert.h>
#include "DBGCInternal.h"
//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//
//
//
// B r e a k p o i n t M a n a g e m e n t
//
//
//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//\\//
/**
* Adds a breakpoint to the DBGC breakpoint list.
*/
int dbgcBpAdd(PDBGC pDbgc, RTUINT iBp, const char *pszCmd)
{
/*
* Check if it already exists.
*/
PDBGCBP pBp = dbgcBpGet(pDbgc, iBp);
if (pBp)
return VERR_DBGC_BP_EXISTS;
/*
* Add the breakpoint.
*/
if (pszCmd)
pszCmd = RTStrStripL(pszCmd);
size_t cchCmd = pszCmd ? strlen(pszCmd) : 0;
pBp = (PDBGCBP)RTMemAlloc(RT_UOFFSETOF_DYN(DBGCBP, szCmd[cchCmd + 1]));
if (!pBp)
return VERR_NO_MEMORY;
if (cchCmd)
memcpy(pBp->szCmd, pszCmd, cchCmd + 1);
else
pBp->szCmd[0] = '\0';
pBp->cchCmd = cchCmd;
pBp->iBp = iBp;
pBp->pNext = pDbgc->pFirstBp;
pDbgc->pFirstBp = pBp;
return VINF_SUCCESS;
}
/**
* Updates the a breakpoint.
*
* @returns VBox status code.
* @param pDbgc The DBGC instance.
* @param iBp The breakpoint to update.
* @param pszCmd The new command.
*/
int dbgcBpUpdate(PDBGC pDbgc, RTUINT iBp, const char *pszCmd)
{
/*
* Find the breakpoint.
*/
PDBGCBP pBp = dbgcBpGet(pDbgc, iBp);
if (!pBp)
return VERR_DBGC_BP_NOT_FOUND;
/*
* Do we need to reallocate?
*/
if (pszCmd)
pszCmd = RTStrStripL(pszCmd);
if (!pszCmd || !*pszCmd)
pBp->szCmd[0] = '\0';
else
{
size_t cchCmd = strlen(pszCmd);
if (strlen(pBp->szCmd) >= cchCmd)
{
memcpy(pBp->szCmd, pszCmd, cchCmd + 1);
pBp->cchCmd = cchCmd;
}
else
{
/*
* Yes, let's do it the simple way...
*/
int rc = dbgcBpDelete(pDbgc, iBp);
AssertRC(rc);
return dbgcBpAdd(pDbgc, iBp, pszCmd);
}
}
return VINF_SUCCESS;
}
/**
* Deletes a breakpoint.
*
* @returns VBox status code.
* @param pDbgc The DBGC instance.
* @param iBp The breakpoint to delete.
*/
int dbgcBpDelete(PDBGC pDbgc, RTUINT iBp)
{
/*
* Search thru the list, when found unlink and free it.
*/
PDBGCBP pBpPrev = NULL;
PDBGCBP pBp = pDbgc->pFirstBp;
for (; pBp; pBp = pBp->pNext)
{
if (pBp->iBp == iBp)
{
if (pBpPrev)
pBpPrev->pNext = pBp->pNext;
else
pDbgc->pFirstBp = pBp->pNext;
RTMemFree(pBp);
return VINF_SUCCESS;
}
pBpPrev = pBp;
}
return VERR_DBGC_BP_NOT_FOUND;
}
/**
* Get a breakpoint.
*
* @returns Pointer to the breakpoint.
* @returns NULL if the breakpoint wasn't found.
* @param pDbgc The DBGC instance.
* @param iBp The breakpoint to get.
*/
PDBGCBP dbgcBpGet(PDBGC pDbgc, RTUINT iBp)
{
/*
* Enumerate the list.
*/
PDBGCBP pBp = pDbgc->pFirstBp;
for (; pBp; pBp = pBp->pNext)
if (pBp->iBp == iBp)
return pBp;
return NULL;
}
/**
* Executes the command of a breakpoint.
*
* @returns VINF_DBGC_BP_NO_COMMAND if there is no command associated with the breakpoint.
* @returns VERR_DBGC_BP_NOT_FOUND if the breakpoint wasn't found.
* @returns VERR_BUFFER_OVERFLOW if the is not enough space in the scratch buffer for the command.
* @returns VBox status code from dbgcEvalCommand() otherwise.
* @param pDbgc The DBGC instance.
* @param iBp The breakpoint to execute.
*/
int dbgcBpExec(PDBGC pDbgc, RTUINT iBp)
{
/*
* Find the breakpoint.
*/
PDBGCBP pBp = dbgcBpGet(pDbgc, iBp);
if (!pBp)
return VERR_DBGC_BP_NOT_FOUND;
/*
* Anything to do?
*/
if (!pBp->cchCmd)
return VINF_DBGC_BP_NO_COMMAND;
/*
* Execute the command.
* This means copying it to the scratch buffer and process it as if it
* were user input. We must save and restore the state of the scratch buffer.
*/
/* Save the scratch state. */
char *pszScratch = pDbgc->pszScratch;
unsigned iArg = pDbgc->iArg;
/* Copy the command to the scratch buffer. */
size_t cbScratch = sizeof(pDbgc->achScratch) - (pDbgc->pszScratch - &pDbgc->achScratch[0]);
if (pBp->cchCmd >= cbScratch)
return VERR_BUFFER_OVERFLOW;
memcpy(pDbgc->pszScratch, pBp->szCmd, pBp->cchCmd + 1);
/* Execute the command. */
pDbgc->pszScratch = pDbgc->pszScratch + pBp->cchCmd + 1;
int rc = dbgcEvalCommand(pDbgc, pszScratch, pBp->cchCmd, false /* fNoExecute */);
/* Restore the scratch state. */
pDbgc->iArg = iArg;
pDbgc->pszScratch = pszScratch;
return rc;
}
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