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
|
//===-- DynamicLoaderStatic.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 "lldb/Core/Module.h"
#include "lldb/Core/PluginManager.h"
#include "lldb/Core/Section.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Target/SectionLoadList.h"
#include "lldb/Target/Target.h"
#include "DynamicLoaderStatic.h"
using namespace lldb;
using namespace lldb_private;
LLDB_PLUGIN_DEFINE(DynamicLoaderStatic)
// Create an instance of this class. This function is filled into the plugin
// info class that gets handed out by the plugin factory and allows the lldb to
// instantiate an instance of this class.
DynamicLoader *DynamicLoaderStatic::CreateInstance(Process *process,
bool force) {
bool create = force;
if (!create) {
const llvm::Triple &triple_ref =
process->GetTarget().GetArchitecture().GetTriple();
const llvm::Triple::OSType os_type = triple_ref.getOS();
const llvm::Triple::ArchType arch_type = triple_ref.getArch();
if (os_type == llvm::Triple::UnknownOS) {
// The WASM and Hexagon plugin check the ArchType rather than the OSType,
// so explicitly reject those here.
switch(arch_type) {
case llvm::Triple::hexagon:
case llvm::Triple::wasm32:
case llvm::Triple::wasm64:
break;
default:
create = true;
}
}
}
if (!create) {
Module *exe_module = process->GetTarget().GetExecutableModulePointer();
if (exe_module) {
ObjectFile *object_file = exe_module->GetObjectFile();
if (object_file) {
create = (object_file->GetStrata() == ObjectFile::eStrataRawImage);
}
}
}
if (create)
return new DynamicLoaderStatic(process);
return nullptr;
}
// Constructor
DynamicLoaderStatic::DynamicLoaderStatic(Process *process)
: DynamicLoader(process) {}
/// Called after attaching a process.
///
/// Allow DynamicLoader plug-ins to execute some code after
/// attaching to a process.
void DynamicLoaderStatic::DidAttach() { LoadAllImagesAtFileAddresses(); }
/// Called after attaching a process.
///
/// Allow DynamicLoader plug-ins to execute some code after
/// attaching to a process.
void DynamicLoaderStatic::DidLaunch() { LoadAllImagesAtFileAddresses(); }
void DynamicLoaderStatic::LoadAllImagesAtFileAddresses() {
const ModuleList &module_list = m_process->GetTarget().GetImages();
ModuleList loaded_module_list;
// Disable JIT for static dynamic loader targets
m_process->SetCanJIT(false);
Target &target = m_process->GetTarget();
for (ModuleSP module_sp : module_list.Modules()) {
if (module_sp) {
bool changed = false;
bool no_load_addresses = true;
// If this module has a section with a load address set in
// the target, assume all necessary work is already done. There
// may be sections without a load address set intentionally
// and we don't want to mutate that.
// For a module with no load addresses set, set the load addresses
// to slide == 0, the same as the file addresses, in the target.
ObjectFile *image_object_file = module_sp->GetObjectFile();
if (image_object_file) {
SectionList *section_list = image_object_file->GetSectionList();
if (section_list) {
const size_t num_sections = section_list->GetSize();
for (size_t sect_idx = 0; sect_idx < num_sections; ++sect_idx) {
SectionSP section_sp(section_list->GetSectionAtIndex(sect_idx));
if (section_sp) {
if (target.GetSectionLoadAddress(section_sp) !=
LLDB_INVALID_ADDRESS) {
no_load_addresses = false;
break;
}
}
}
}
}
if (no_load_addresses)
module_sp->SetLoadAddress(target, 0, true /*value_is_offset*/, changed);
if (changed)
loaded_module_list.AppendIfNeeded(module_sp);
}
}
target.ModulesDidLoad(loaded_module_list);
}
ThreadPlanSP
DynamicLoaderStatic::GetStepThroughTrampolinePlan(Thread &thread,
bool stop_others) {
return ThreadPlanSP();
}
Status DynamicLoaderStatic::CanLoadImage() {
return Status::FromErrorString(
"can't load images on with a static debug session");
}
void DynamicLoaderStatic::Initialize() {
PluginManager::RegisterPlugin(GetPluginNameStatic(),
GetPluginDescriptionStatic(), CreateInstance);
}
void DynamicLoaderStatic::Terminate() {
PluginManager::UnregisterPlugin(CreateInstance);
}
llvm::StringRef DynamicLoaderStatic::GetPluginDescriptionStatic() {
return "Dynamic loader plug-in that will load any images at the static "
"addresses contained in each image.";
}
|
