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
|
//===-- DNBBreakpoint.cpp ---------------------------------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Created by Greg Clayton on 6/29/07.
//
//===----------------------------------------------------------------------===//
#include "DNBBreakpoint.h"
#include "DNBLog.h"
#include "MachProcess.h"
#include <algorithm>
#include <assert.h>
#include <inttypes.h>
#pragma mark-- DNBBreakpoint
DNBBreakpoint::DNBBreakpoint(nub_addr_t addr, nub_size_t byte_size,
bool hardware)
: m_retain_count(1), m_byte_size(static_cast<uint32_t>(byte_size)),
m_opcode(), m_addr(addr), m_enabled(0), m_hw_preferred(hardware),
m_is_watchpoint(0), m_watch_read(0), m_watch_write(0),
m_hw_index(INVALID_NUB_HW_INDEX) {}
DNBBreakpoint::~DNBBreakpoint() {}
void DNBBreakpoint::Dump() const {
if (IsBreakpoint()) {
DNBLog("DNBBreakpoint addr = 0x%llx state = %s type = %s breakpoint "
"hw_index = %i",
(uint64_t)m_addr, m_enabled ? "enabled " : "disabled",
IsHardware() ? "hardware" : "software", GetHardwareIndex());
} else {
DNBLog("DNBBreakpoint addr = 0x%llx size = %llu state = %s type = %s "
"watchpoint (%s%s) hw_index = %i",
(uint64_t)m_addr, (uint64_t)m_byte_size,
m_enabled ? "enabled " : "disabled",
IsHardware() ? "hardware" : "software", m_watch_read ? "r" : "",
m_watch_write ? "w" : "", GetHardwareIndex());
}
}
#pragma mark-- DNBBreakpointList
DNBBreakpointList::DNBBreakpointList() {}
DNBBreakpointList::~DNBBreakpointList() {}
DNBBreakpoint *DNBBreakpointList::Add(nub_addr_t addr, nub_size_t length,
bool hardware) {
m_breakpoints.insert(
std::make_pair(addr, DNBBreakpoint(addr, length, hardware)));
iterator pos = m_breakpoints.find(addr);
return &pos->second;
}
bool DNBBreakpointList::Remove(nub_addr_t addr) {
iterator pos = m_breakpoints.find(addr);
if (pos != m_breakpoints.end()) {
m_breakpoints.erase(pos);
return true;
}
return false;
}
DNBBreakpoint *DNBBreakpointList::FindByAddress(nub_addr_t addr) {
iterator pos = m_breakpoints.find(addr);
if (pos != m_breakpoints.end())
return &pos->second;
return NULL;
}
const DNBBreakpoint *DNBBreakpointList::FindByAddress(nub_addr_t addr) const {
const_iterator pos = m_breakpoints.find(addr);
if (pos != m_breakpoints.end())
return &pos->second;
return NULL;
}
// Finds the next breakpoint at an address greater than or equal to "addr"
size_t DNBBreakpointList::FindBreakpointsThatOverlapRange(
nub_addr_t addr, nub_addr_t size, std::vector<DNBBreakpoint *> &bps) {
bps.clear();
iterator end = m_breakpoints.end();
// Find the first breakpoint with an address >= to "addr"
iterator pos = m_breakpoints.lower_bound(addr);
if (pos != end) {
if (pos != m_breakpoints.begin()) {
// Watch out for a breakpoint at an address less than "addr" that might
// still overlap
iterator prev_pos = pos;
--prev_pos;
if (prev_pos->second.IntersectsRange(addr, size, NULL, NULL, NULL))
bps.push_back(&pos->second);
}
while (pos != end) {
// When we hit a breakpoint whose start address is greater than "addr +
// size" we are done.
// Do the math in a way that doesn't risk unsigned overflow with bad
// input.
if ((pos->second.Address() - addr) >= size)
break;
// Check if this breakpoint overlaps, and if it does, add it to the list
if (pos->second.IntersectsRange(addr, size, NULL, NULL, NULL)) {
bps.push_back(&pos->second);
++pos;
}
}
}
return bps.size();
}
void DNBBreakpointList::Dump() const {
const_iterator pos;
const_iterator end = m_breakpoints.end();
for (pos = m_breakpoints.begin(); pos != end; ++pos)
pos->second.Dump();
}
void DNBBreakpointList::DisableAll() {
iterator pos, end = m_breakpoints.end();
for (pos = m_breakpoints.begin(); pos != end; ++pos)
pos->second.SetEnabled(false);
}
void DNBBreakpointList::RemoveTrapsFromBuffer(nub_addr_t addr, nub_size_t size,
void *p) const {
uint8_t *buf = (uint8_t *)p;
const_iterator end = m_breakpoints.end();
const_iterator pos = m_breakpoints.lower_bound(addr);
while (pos != end && (pos->first < (addr + size))) {
nub_addr_t intersect_addr;
nub_size_t intersect_size;
nub_size_t opcode_offset;
const DNBBreakpoint &bp = pos->second;
if (bp.IntersectsRange(addr, size, &intersect_addr, &intersect_size,
&opcode_offset)) {
assert(addr <= intersect_addr && intersect_addr < addr + size);
assert(addr < intersect_addr + intersect_size &&
intersect_addr + intersect_size <= addr + size);
assert(opcode_offset + intersect_size <= bp.ByteSize());
nub_size_t buf_offset = intersect_addr - addr;
::memcpy(buf + buf_offset, bp.SavedOpcodeBytes() + opcode_offset,
intersect_size);
}
++pos;
}
}
void DNBBreakpointList::DisableAllBreakpoints(MachProcess *process) {
iterator pos, end = m_breakpoints.end();
for (pos = m_breakpoints.begin(); pos != end; ++pos)
process->DisableBreakpoint(pos->second.Address(), false);
}
void DNBBreakpointList::DisableAllWatchpoints(MachProcess *process) {
iterator pos, end = m_breakpoints.end();
for (pos = m_breakpoints.begin(); pos != end; ++pos)
process->DisableWatchpoint(pos->second.Address(), false);
}
void DNBBreakpointList::RemoveDisabled() {
iterator pos = m_breakpoints.begin();
while (pos != m_breakpoints.end()) {
if (!pos->second.IsEnabled())
pos = m_breakpoints.erase(pos);
else
++pos;
}
}
|
