1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
/* $Id: DBGCCmdWorkers.cpp $ */
/** @file
* DBGC - Debugger Console, Command Worker Routines.
*/
/*
* Copyright (C) 2006-2019 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;
}
|
