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
|
//===-- RegisterContextWindows.cpp ------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "lldb/Host/windows/HostThreadWindows.h"
#include "lldb/Host/windows/windows.h"
#include "lldb/Utility/DataBufferHeap.h"
#include "lldb/Utility/Status.h"
#include "lldb/lldb-private-types.h"
#include "ProcessWindowsLog.h"
#include "RegisterContextWindows.h"
#include "TargetThreadWindows.h"
#include "llvm/ADT/STLExtras.h"
using namespace lldb;
using namespace lldb_private;
const DWORD kWinContextFlags = CONTEXT_CONTROL | CONTEXT_INTEGER;
//------------------------------------------------------------------
// Constructors and Destructors
//------------------------------------------------------------------
RegisterContextWindows::RegisterContextWindows(Thread &thread,
uint32_t concrete_frame_idx)
: RegisterContext(thread, concrete_frame_idx), m_context(),
m_context_stale(true) {}
RegisterContextWindows::~RegisterContextWindows() {}
void RegisterContextWindows::InvalidateAllRegisters() {
m_context_stale = true;
}
bool RegisterContextWindows::ReadAllRegisterValues(
lldb::DataBufferSP &data_sp) {
if (!CacheAllRegisterValues())
return false;
data_sp.reset(new DataBufferHeap(sizeof(CONTEXT), 0));
memcpy(data_sp->GetBytes(), &m_context, sizeof(m_context));
return true;
}
bool RegisterContextWindows::WriteAllRegisterValues(
const lldb::DataBufferSP &data_sp) {
assert(data_sp->GetByteSize() >= sizeof(m_context));
memcpy(&m_context, data_sp->GetBytes(), sizeof(m_context));
TargetThreadWindows &wthread = static_cast<TargetThreadWindows &>(m_thread);
if (!::SetThreadContext(
wthread.GetHostThread().GetNativeThread().GetSystemHandle(),
&m_context))
return false;
return true;
}
uint32_t RegisterContextWindows::ConvertRegisterKindToRegisterNumber(
lldb::RegisterKind kind, uint32_t num) {
const uint32_t num_regs = GetRegisterCount();
assert(kind < kNumRegisterKinds);
for (uint32_t reg_idx = 0; reg_idx < num_regs; ++reg_idx) {
const RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg_idx);
if (reg_info->kinds[kind] == num)
return reg_idx;
}
return LLDB_INVALID_REGNUM;
}
//------------------------------------------------------------------
// Subclasses can these functions if desired
//------------------------------------------------------------------
uint32_t RegisterContextWindows::NumSupportedHardwareBreakpoints() {
// Support for hardware breakpoints not yet implemented.
return 0;
}
uint32_t RegisterContextWindows::SetHardwareBreakpoint(lldb::addr_t addr,
size_t size) {
return 0;
}
bool RegisterContextWindows::ClearHardwareBreakpoint(uint32_t hw_idx) {
return false;
}
uint32_t RegisterContextWindows::NumSupportedHardwareWatchpoints() {
// Support for hardware watchpoints not yet implemented.
return 0;
}
uint32_t RegisterContextWindows::SetHardwareWatchpoint(lldb::addr_t addr,
size_t size, bool read,
bool write) {
return 0;
}
bool RegisterContextWindows::ClearHardwareWatchpoint(uint32_t hw_index) {
return false;
}
bool RegisterContextWindows::HardwareSingleStep(bool enable) { return false; }
bool RegisterContextWindows::CacheAllRegisterValues() {
Log *log = ProcessWindowsLog::GetLogIfAny(WINDOWS_LOG_REGISTERS);
if (!m_context_stale)
return true;
TargetThreadWindows &wthread = static_cast<TargetThreadWindows &>(m_thread);
memset(&m_context, 0, sizeof(m_context));
m_context.ContextFlags = kWinContextFlags;
if (!::GetThreadContext(
wthread.GetHostThread().GetNativeThread().GetSystemHandle(),
&m_context)) {
LLDB_LOG(
log,
"GetThreadContext failed with error {0} while caching register values.",
::GetLastError());
return false;
}
LLDB_LOG(log, "successfully updated the register values.");
m_context_stale = false;
return true;
}
|
