97206d5727
This renames the LLDB error class to Status, as discussed on the lldb-dev mailing list. A change of this magnitude cannot easily be done without find and replace, but that has potential to catch unwanted occurrences of common strings such as "Error". Every effort was made to find all the obvious things such as the word "Error" appearing in a string, etc, but it's possible there are still some lingering occurences left around. Hopefully nothing too serious. llvm-svn: 302872
250 lines
8.3 KiB
C++
250 lines
8.3 KiB
C++
//===-- DynamicLoader.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/Target/DynamicLoader.h"
|
|
|
|
#include "lldb/Core/Module.h"
|
|
#include "lldb/Core/ModuleList.h" // for ModuleList
|
|
#include "lldb/Core/ModuleSpec.h"
|
|
#include "lldb/Core/PluginManager.h"
|
|
#include "lldb/Core/Section.h"
|
|
#include "lldb/Symbol/ObjectFile.h" // for ObjectFile
|
|
#include "lldb/Target/MemoryRegionInfo.h"
|
|
#include "lldb/Target/Process.h"
|
|
#include "lldb/Target/Target.h"
|
|
#include "lldb/Utility/ConstString.h" // for ConstString
|
|
#include "lldb/lldb-private-interfaces.h" // for DynamicLoaderCreateInstance
|
|
|
|
#include "llvm/ADT/StringRef.h" // for StringRef
|
|
|
|
#include <memory> // for shared_ptr, unique_ptr
|
|
|
|
#include <assert.h> // for assert
|
|
|
|
using namespace lldb;
|
|
using namespace lldb_private;
|
|
|
|
DynamicLoader *DynamicLoader::FindPlugin(Process *process,
|
|
const char *plugin_name) {
|
|
DynamicLoaderCreateInstance create_callback = nullptr;
|
|
if (plugin_name) {
|
|
ConstString const_plugin_name(plugin_name);
|
|
create_callback =
|
|
PluginManager::GetDynamicLoaderCreateCallbackForPluginName(
|
|
const_plugin_name);
|
|
if (create_callback) {
|
|
std::unique_ptr<DynamicLoader> instance_ap(
|
|
create_callback(process, true));
|
|
if (instance_ap)
|
|
return instance_ap.release();
|
|
}
|
|
} else {
|
|
for (uint32_t idx = 0;
|
|
(create_callback =
|
|
PluginManager::GetDynamicLoaderCreateCallbackAtIndex(idx)) !=
|
|
nullptr;
|
|
++idx) {
|
|
std::unique_ptr<DynamicLoader> instance_ap(
|
|
create_callback(process, false));
|
|
if (instance_ap)
|
|
return instance_ap.release();
|
|
}
|
|
}
|
|
return nullptr;
|
|
}
|
|
|
|
DynamicLoader::DynamicLoader(Process *process) : m_process(process) {}
|
|
|
|
DynamicLoader::~DynamicLoader() = default;
|
|
|
|
//----------------------------------------------------------------------
|
|
// Accessosors to the global setting as to whether to stop at image
|
|
// (shared library) loading/unloading.
|
|
//----------------------------------------------------------------------
|
|
|
|
bool DynamicLoader::GetStopWhenImagesChange() const {
|
|
return m_process->GetStopOnSharedLibraryEvents();
|
|
}
|
|
|
|
void DynamicLoader::SetStopWhenImagesChange(bool stop) {
|
|
m_process->SetStopOnSharedLibraryEvents(stop);
|
|
}
|
|
|
|
ModuleSP DynamicLoader::GetTargetExecutable() {
|
|
Target &target = m_process->GetTarget();
|
|
ModuleSP executable = target.GetExecutableModule();
|
|
|
|
if (executable) {
|
|
if (executable->GetFileSpec().Exists()) {
|
|
ModuleSpec module_spec(executable->GetFileSpec(),
|
|
executable->GetArchitecture());
|
|
auto module_sp = std::make_shared<Module>(module_spec);
|
|
|
|
// Check if the executable has changed and set it to the target executable
|
|
// if they differ.
|
|
if (module_sp && module_sp->GetUUID().IsValid() &&
|
|
executable->GetUUID().IsValid()) {
|
|
if (module_sp->GetUUID() != executable->GetUUID())
|
|
executable.reset();
|
|
} else if (executable->FileHasChanged()) {
|
|
executable.reset();
|
|
}
|
|
|
|
if (!executable) {
|
|
executable = target.GetSharedModule(module_spec);
|
|
if (executable.get() != target.GetExecutableModulePointer()) {
|
|
// Don't load dependent images since we are in dyld where we will know
|
|
// and find out about all images that are loaded
|
|
const bool get_dependent_images = false;
|
|
target.SetExecutableModule(executable, get_dependent_images);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return executable;
|
|
}
|
|
|
|
void DynamicLoader::UpdateLoadedSections(ModuleSP module, addr_t link_map_addr,
|
|
addr_t base_addr,
|
|
bool base_addr_is_offset) {
|
|
UpdateLoadedSectionsCommon(module, base_addr, base_addr_is_offset);
|
|
}
|
|
|
|
void DynamicLoader::UpdateLoadedSectionsCommon(ModuleSP module,
|
|
addr_t base_addr,
|
|
bool base_addr_is_offset) {
|
|
bool changed;
|
|
module->SetLoadAddress(m_process->GetTarget(), base_addr, base_addr_is_offset,
|
|
changed);
|
|
}
|
|
|
|
void DynamicLoader::UnloadSections(const ModuleSP module) {
|
|
UnloadSectionsCommon(module);
|
|
}
|
|
|
|
void DynamicLoader::UnloadSectionsCommon(const ModuleSP module) {
|
|
Target &target = m_process->GetTarget();
|
|
const SectionList *sections = GetSectionListFromModule(module);
|
|
|
|
assert(sections && "SectionList missing from unloaded module.");
|
|
|
|
const size_t num_sections = sections->GetSize();
|
|
for (size_t i = 0; i < num_sections; ++i) {
|
|
SectionSP section_sp(sections->GetSectionAtIndex(i));
|
|
target.SetSectionUnloaded(section_sp);
|
|
}
|
|
}
|
|
|
|
const SectionList *
|
|
DynamicLoader::GetSectionListFromModule(const ModuleSP module) const {
|
|
SectionList *sections = nullptr;
|
|
if (module) {
|
|
ObjectFile *obj_file = module->GetObjectFile();
|
|
if (obj_file != nullptr) {
|
|
sections = obj_file->GetSectionList();
|
|
}
|
|
}
|
|
return sections;
|
|
}
|
|
|
|
ModuleSP DynamicLoader::LoadModuleAtAddress(const FileSpec &file,
|
|
addr_t link_map_addr,
|
|
addr_t base_addr,
|
|
bool base_addr_is_offset) {
|
|
Target &target = m_process->GetTarget();
|
|
ModuleList &modules = target.GetImages();
|
|
ModuleSpec module_spec(file, target.GetArchitecture());
|
|
ModuleSP module_sp;
|
|
|
|
if ((module_sp = modules.FindFirstModule(module_spec))) {
|
|
UpdateLoadedSections(module_sp, link_map_addr, base_addr,
|
|
base_addr_is_offset);
|
|
return module_sp;
|
|
}
|
|
|
|
if ((module_sp = target.GetSharedModule(module_spec))) {
|
|
UpdateLoadedSections(module_sp, link_map_addr, base_addr,
|
|
base_addr_is_offset);
|
|
return module_sp;
|
|
}
|
|
|
|
bool check_alternative_file_name = true;
|
|
if (base_addr_is_offset) {
|
|
// Try to fetch the load address of the file from the process as we need
|
|
// absolute load
|
|
// address to read the file out of the memory instead of a load bias.
|
|
bool is_loaded = false;
|
|
lldb::addr_t load_addr;
|
|
Status error = m_process->GetFileLoadAddress(file, is_loaded, load_addr);
|
|
if (error.Success() && is_loaded) {
|
|
check_alternative_file_name = false;
|
|
base_addr = load_addr;
|
|
}
|
|
}
|
|
|
|
// We failed to find the module based on its name. Lets try to check if we can
|
|
// find a
|
|
// different name based on the memory region info.
|
|
if (check_alternative_file_name) {
|
|
MemoryRegionInfo memory_info;
|
|
Status error = m_process->GetMemoryRegionInfo(base_addr, memory_info);
|
|
if (error.Success() && memory_info.GetMapped() &&
|
|
memory_info.GetRange().GetRangeBase() == base_addr &&
|
|
!(memory_info.GetName().IsEmpty())) {
|
|
ModuleSpec new_module_spec(
|
|
FileSpec(memory_info.GetName().AsCString(), false),
|
|
target.GetArchitecture());
|
|
|
|
if ((module_sp = modules.FindFirstModule(new_module_spec))) {
|
|
UpdateLoadedSections(module_sp, link_map_addr, base_addr, false);
|
|
return module_sp;
|
|
}
|
|
|
|
if ((module_sp = target.GetSharedModule(new_module_spec))) {
|
|
UpdateLoadedSections(module_sp, link_map_addr, base_addr, false);
|
|
return module_sp;
|
|
}
|
|
}
|
|
}
|
|
|
|
if ((module_sp = m_process->ReadModuleFromMemory(file, base_addr))) {
|
|
UpdateLoadedSections(module_sp, link_map_addr, base_addr, false);
|
|
target.GetImages().AppendIfNeeded(module_sp);
|
|
}
|
|
|
|
return module_sp;
|
|
}
|
|
|
|
int64_t DynamicLoader::ReadUnsignedIntWithSizeInBytes(addr_t addr,
|
|
int size_in_bytes) {
|
|
Status error;
|
|
uint64_t value =
|
|
m_process->ReadUnsignedIntegerFromMemory(addr, size_in_bytes, 0, error);
|
|
if (error.Fail())
|
|
return -1;
|
|
else
|
|
return (int64_t)value;
|
|
}
|
|
|
|
addr_t DynamicLoader::ReadPointer(addr_t addr) {
|
|
Status error;
|
|
addr_t value = m_process->ReadPointerFromMemory(addr, error);
|
|
if (error.Fail())
|
|
return LLDB_INVALID_ADDRESS;
|
|
else
|
|
return value;
|
|
}
|
|
|
|
void DynamicLoader::LoadOperatingSystemPlugin(bool flush)
|
|
{
|
|
if (m_process)
|
|
m_process->LoadOperatingSystemPlugin(flush);
|
|
}
|
|
|