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//===-- 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);
for (ModuleSP module_sp : module_list.Modules()) {
if (module_sp) {
bool changed = false;
ObjectFile *image_object_file = module_sp->GetObjectFile();
if (image_object_file) {
SectionList *section_list = image_object_file->GetSectionList();
if (section_list) {
// All sections listed in the dyld image info structure will all
// either be fixed up already, or they will all be off by a single
// slide amount that is determined by finding the first segment that
// is at file offset zero which also has bytes (a file size that is
// greater than zero) in the object file.
// Determine the slide amount (if any)
const size_t num_sections = section_list->GetSize();
size_t sect_idx = 0;
for (sect_idx = 0; sect_idx < num_sections; ++sect_idx) {
// Iterate through the object file sections to find the first
// section that starts of file offset zero and that has bytes in
// the file...
SectionSP section_sp(section_list->GetSectionAtIndex(sect_idx));
if (section_sp) {
// If this section already has a load address set in the target,
// don't re-set it to the file address. Something may have
// set it to a more correct value already.
if (m_process->GetTarget()
.GetSectionLoadList()
.GetSectionLoadAddress(section_sp) !=
LLDB_INVALID_ADDRESS) {
continue;
}
if (m_process->GetTarget().SetSectionLoadAddress(
section_sp, section_sp->GetFileAddress()))
changed = true;
}
}
}
}
if (changed)
loaded_module_list.AppendIfNeeded(module_sp);
}
}
m_process->GetTarget().ModulesDidLoad(loaded_module_list);
}
ThreadPlanSP
DynamicLoaderStatic::GetStepThroughTrampolinePlan(Thread &thread,
bool stop_others) {
return ThreadPlanSP();
}
Status DynamicLoaderStatic::CanLoadImage() {
Status error;
error.SetErrorString("can't load images on with a static debug session");
return error;
}
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.";
}
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