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
|
//===-- InferiorCallPOSIX.cpp ---------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#include "InferiorCallPOSIX.h"
#include "lldb/Core/Address.h"
#include "lldb/Core/Module.h"
#include "lldb/Expression/DiagnosticManager.h"
#include "lldb/Host/Config.h"
#include "lldb/Symbol/SymbolContext.h"
#include "lldb/Symbol/TypeSystem.h"
#include "lldb/Target/ExecutionContext.h"
#include "lldb/Target/Platform.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Target.h"
#include "lldb/Target/ThreadPlanCallFunction.h"
#include "lldb/ValueObject/ValueObject.h"
#if LLDB_ENABLE_POSIX
#include <sys/mman.h>
#else
// define them
#define PROT_NONE 0
#define PROT_READ 1
#define PROT_WRITE 2
#define PROT_EXEC 4
#endif
using namespace lldb;
using namespace lldb_private;
bool lldb_private::InferiorCallMmap(Process *process, addr_t &allocated_addr,
addr_t addr, addr_t length, unsigned prot,
unsigned flags, addr_t fd, addr_t offset) {
Thread *thread =
process->GetThreadList().GetExpressionExecutionThread().get();
if (thread == nullptr)
return false;
ModuleFunctionSearchOptions function_options;
function_options.include_symbols = true;
function_options.include_inlines = false;
SymbolContextList sc_list;
process->GetTarget().GetImages().FindFunctions(
ConstString("mmap"), eFunctionNameTypeFull, function_options, sc_list);
const uint32_t count = sc_list.GetSize();
if (count > 0) {
SymbolContext sc;
if (sc_list.GetContextAtIndex(0, sc)) {
const uint32_t range_scope =
eSymbolContextFunction | eSymbolContextSymbol;
const bool use_inline_block_range = false;
EvaluateExpressionOptions options;
options.SetStopOthers(true);
options.SetUnwindOnError(true);
options.SetIgnoreBreakpoints(true);
options.SetTryAllThreads(true);
options.SetDebug(false);
options.SetTimeout(process->GetUtilityExpressionTimeout());
options.SetTrapExceptions(false);
addr_t prot_arg;
if (prot == eMmapProtNone)
prot_arg = PROT_NONE;
else {
prot_arg = 0;
if (prot & eMmapProtExec)
prot_arg |= PROT_EXEC;
if (prot & eMmapProtRead)
prot_arg |= PROT_READ;
if (prot & eMmapProtWrite)
prot_arg |= PROT_WRITE;
}
AddressRange mmap_range;
if (sc.GetAddressRange(range_scope, 0, use_inline_block_range,
mmap_range)) {
auto type_system_or_err =
process->GetTarget().GetScratchTypeSystemForLanguage(
eLanguageTypeC);
if (!type_system_or_err) {
llvm::consumeError(type_system_or_err.takeError());
return false;
}
auto ts = *type_system_or_err;
if (!ts)
return false;
CompilerType void_ptr_type =
ts->GetBasicTypeFromAST(eBasicTypeVoid).GetPointerType();
const ArchSpec arch = process->GetTarget().GetArchitecture();
MmapArgList args =
process->GetTarget().GetPlatform()->GetMmapArgumentList(
arch, addr, length, prot_arg, flags, fd, offset);
lldb::ThreadPlanSP call_plan_sp(
new ThreadPlanCallFunction(*thread, mmap_range.GetBaseAddress(),
void_ptr_type, args, options));
if (call_plan_sp) {
DiagnosticManager diagnostics;
StackFrame *frame = thread->GetStackFrameAtIndex(0).get();
if (frame) {
ExecutionContext exe_ctx;
frame->CalculateExecutionContext(exe_ctx);
ExpressionResults result = process->RunThreadPlan(
exe_ctx, call_plan_sp, options, diagnostics);
if (result == eExpressionCompleted) {
allocated_addr =
call_plan_sp->GetReturnValueObject()->GetValueAsUnsigned(
LLDB_INVALID_ADDRESS);
if (process->GetAddressByteSize() == 4) {
if (allocated_addr == UINT32_MAX)
return false;
} else if (process->GetAddressByteSize() == 8) {
if (allocated_addr == UINT64_MAX)
return false;
}
return true;
}
}
}
}
}
}
return false;
}
bool lldb_private::InferiorCallMunmap(Process *process, addr_t addr,
addr_t length) {
Thread *thread =
process->GetThreadList().GetExpressionExecutionThread().get();
if (thread == nullptr)
return false;
ModuleFunctionSearchOptions function_options;
function_options.include_symbols = true;
function_options.include_inlines = false;
SymbolContextList sc_list;
process->GetTarget().GetImages().FindFunctions(
ConstString("munmap"), eFunctionNameTypeFull, function_options, sc_list);
const uint32_t count = sc_list.GetSize();
if (count > 0) {
SymbolContext sc;
if (sc_list.GetContextAtIndex(0, sc)) {
const uint32_t range_scope =
eSymbolContextFunction | eSymbolContextSymbol;
const bool use_inline_block_range = false;
EvaluateExpressionOptions options;
options.SetStopOthers(true);
options.SetUnwindOnError(true);
options.SetIgnoreBreakpoints(true);
options.SetTryAllThreads(true);
options.SetDebug(false);
options.SetTimeout(process->GetUtilityExpressionTimeout());
options.SetTrapExceptions(false);
AddressRange munmap_range;
if (sc.GetAddressRange(range_scope, 0, use_inline_block_range,
munmap_range)) {
lldb::addr_t args[] = {addr, length};
lldb::ThreadPlanSP call_plan_sp(
new ThreadPlanCallFunction(*thread, munmap_range.GetBaseAddress(),
CompilerType(), args, options));
if (call_plan_sp) {
DiagnosticManager diagnostics;
StackFrame *frame = thread->GetStackFrameAtIndex(0).get();
if (frame) {
ExecutionContext exe_ctx;
frame->CalculateExecutionContext(exe_ctx);
ExpressionResults result = process->RunThreadPlan(
exe_ctx, call_plan_sp, options, diagnostics);
if (result == eExpressionCompleted) {
return true;
}
}
}
}
}
}
return false;
}
|
