blob: 9176c9dbb357bfd9535b6063bbe42b5dfabb386f [file] [log] [blame]
//===-- ModuleList.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/ModuleList.h"
#include "lldb/Core/FileSpecList.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Host/FileSystem.h"
#include "lldb/Interpreter/OptionValueFileSpec.h"
#include "lldb/Interpreter/OptionValueFileSpecList.h"
#include "lldb/Interpreter/OptionValueProperties.h"
#include "lldb/Interpreter/Property.h"
#include "lldb/Symbol/LocateSymbolFile.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/SymbolContext.h"
#include "lldb/Symbol/TypeList.h"
#include "lldb/Symbol/VariableList.h"
#include "lldb/Utility/ArchSpec.h"
#include "lldb/Utility/ConstString.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/Logging.h"
#include "lldb/Utility/UUID.h"
#include "lldb/lldb-defines.h"
#if defined(_WIN32)
#include "lldb/Host/windows/PosixApi.h"
#endif
#include "clang/Driver/Driver.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Threading.h"
#include "llvm/Support/raw_ostream.h"
#include <chrono>
#include <memory>
#include <mutex>
#include <string>
#include <utility>
namespace lldb_private {
class Function;
}
namespace lldb_private {
class RegularExpression;
}
namespace lldb_private {
class Stream;
}
namespace lldb_private {
class SymbolFile;
}
namespace lldb_private {
class Target;
}
using namespace lldb;
using namespace lldb_private;
namespace {
#define LLDB_PROPERTIES_modulelist
#include "CoreProperties.inc"
enum {
#define LLDB_PROPERTIES_modulelist
#include "CorePropertiesEnum.inc"
};
} // namespace
ModuleListProperties::ModuleListProperties() {
m_collection_sp =
std::make_shared<OptionValueProperties>(ConstString("symbols"));
m_collection_sp->Initialize(g_modulelist_properties);
m_collection_sp->SetValueChangedCallback(ePropertySymLinkPaths,
[this] { UpdateSymlinkMappings(); });
llvm::SmallString<128> path;
if (clang::driver::Driver::getDefaultModuleCachePath(path)) {
lldbassert(SetClangModulesCachePath(FileSpec(path)));
}
}
bool ModuleListProperties::GetEnableExternalLookup() const {
const uint32_t idx = ePropertyEnableExternalLookup;
return m_collection_sp->GetPropertyAtIndexAsBoolean(
nullptr, idx, g_modulelist_properties[idx].default_uint_value != 0);
}
bool ModuleListProperties::SetEnableExternalLookup(bool new_value) {
return m_collection_sp->SetPropertyAtIndexAsBoolean(
nullptr, ePropertyEnableExternalLookup, new_value);
}
FileSpec ModuleListProperties::GetClangModulesCachePath() const {
return m_collection_sp
->GetPropertyAtIndexAsOptionValueFileSpec(nullptr, false,
ePropertyClangModulesCachePath)
->GetCurrentValue();
}
bool ModuleListProperties::SetClangModulesCachePath(const FileSpec &path) {
return m_collection_sp->SetPropertyAtIndexAsFileSpec(
nullptr, ePropertyClangModulesCachePath, path);
}
void ModuleListProperties::UpdateSymlinkMappings() {
FileSpecList list = m_collection_sp
->GetPropertyAtIndexAsOptionValueFileSpecList(
nullptr, false, ePropertySymLinkPaths)
->GetCurrentValue();
llvm::sys::ScopedWriter lock(m_symlink_paths_mutex);
const bool notify = false;
m_symlink_paths.Clear(notify);
for (FileSpec symlink : list) {
FileSpec resolved;
Status status = FileSystem::Instance().Readlink(symlink, resolved);
if (status.Success())
m_symlink_paths.Append(symlink.GetPath(), resolved.GetPath(), notify);
}
}
PathMappingList ModuleListProperties::GetSymlinkMappings() const {
llvm::sys::ScopedReader lock(m_symlink_paths_mutex);
return m_symlink_paths;
}
ModuleList::ModuleList() : m_modules(), m_modules_mutex() {}
ModuleList::ModuleList(const ModuleList &rhs)
: m_modules(), m_modules_mutex(), m_notifier(nullptr) {
std::lock_guard<std::recursive_mutex> lhs_guard(m_modules_mutex);
std::lock_guard<std::recursive_mutex> rhs_guard(rhs.m_modules_mutex);
m_modules = rhs.m_modules;
}
ModuleList::ModuleList(ModuleList::Notifier *notifier)
: m_modules(), m_modules_mutex(), m_notifier(notifier) {}
const ModuleList &ModuleList::operator=(const ModuleList &rhs) {
if (this != &rhs) {
std::lock(m_modules_mutex, rhs.m_modules_mutex);
std::lock_guard<std::recursive_mutex> lhs_guard(m_modules_mutex,
std::adopt_lock);
std::lock_guard<std::recursive_mutex> rhs_guard(rhs.m_modules_mutex,
std::adopt_lock);
m_modules = rhs.m_modules;
}
return *this;
}
ModuleList::~ModuleList() = default;
void ModuleList::AppendImpl(const ModuleSP &module_sp, bool use_notifier) {
if (module_sp) {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
m_modules.push_back(module_sp);
if (use_notifier && m_notifier)
m_notifier->NotifyModuleAdded(*this, module_sp);
}
}
void ModuleList::Append(const ModuleSP &module_sp, bool notify) {
AppendImpl(module_sp, notify);
}
void ModuleList::ReplaceEquivalent(
const ModuleSP &module_sp,
llvm::SmallVectorImpl<lldb::ModuleSP> *old_modules) {
if (module_sp) {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
// First remove any equivalent modules. Equivalent modules are modules
// whose path, platform path and architecture match.
ModuleSpec equivalent_module_spec(module_sp->GetFileSpec(),
module_sp->GetArchitecture());
equivalent_module_spec.GetPlatformFileSpec() =
module_sp->GetPlatformFileSpec();
size_t idx = 0;
while (idx < m_modules.size()) {
ModuleSP test_module_sp(m_modules[idx]);
if (test_module_sp->MatchesModuleSpec(equivalent_module_spec)) {
if (old_modules)
old_modules->push_back(test_module_sp);
RemoveImpl(m_modules.begin() + idx);
} else {
++idx;
}
}
// Now add the new module to the list
Append(module_sp);
}
}
bool ModuleList::AppendIfNeeded(const ModuleSP &new_module, bool notify) {
if (new_module) {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
for (const ModuleSP &module_sp : m_modules) {
if (module_sp.get() == new_module.get())
return false; // Already in the list
}
// Only push module_sp on the list if it wasn't already in there.
Append(new_module, notify);
return true;
}
return false;
}
void ModuleList::Append(const ModuleList &module_list) {
for (auto pos : module_list.m_modules)
Append(pos);
}
bool ModuleList::AppendIfNeeded(const ModuleList &module_list) {
bool any_in = false;
for (auto pos : module_list.m_modules) {
if (AppendIfNeeded(pos))
any_in = true;
}
return any_in;
}
bool ModuleList::RemoveImpl(const ModuleSP &module_sp, bool use_notifier) {
if (module_sp) {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
collection::iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos) {
if (pos->get() == module_sp.get()) {
m_modules.erase(pos);
if (use_notifier && m_notifier)
m_notifier->NotifyModuleRemoved(*this, module_sp);
return true;
}
}
}
return false;
}
ModuleList::collection::iterator
ModuleList::RemoveImpl(ModuleList::collection::iterator pos,
bool use_notifier) {
ModuleSP module_sp(*pos);
collection::iterator retval = m_modules.erase(pos);
if (use_notifier && m_notifier)
m_notifier->NotifyModuleRemoved(*this, module_sp);
return retval;
}
bool ModuleList::Remove(const ModuleSP &module_sp, bool notify) {
return RemoveImpl(module_sp, notify);
}
bool ModuleList::ReplaceModule(const lldb::ModuleSP &old_module_sp,
const lldb::ModuleSP &new_module_sp) {
if (!RemoveImpl(old_module_sp, false))
return false;
AppendImpl(new_module_sp, false);
if (m_notifier)
m_notifier->NotifyModuleUpdated(*this, old_module_sp, new_module_sp);
return true;
}
bool ModuleList::RemoveIfOrphaned(const Module *module_ptr) {
if (module_ptr) {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
collection::iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos) {
if (pos->get() == module_ptr) {
if (pos->unique()) {
pos = RemoveImpl(pos);
return true;
} else
return false;
}
}
}
return false;
}
size_t ModuleList::RemoveOrphans(bool mandatory) {
std::unique_lock<std::recursive_mutex> lock(m_modules_mutex, std::defer_lock);
if (mandatory) {
lock.lock();
} else {
// Not mandatory, remove orphans if we can get the mutex
if (!lock.try_lock())
return 0;
}
size_t remove_count = 0;
// Modules might hold shared pointers to other modules, so removing one
// module might make other other modules orphans. Keep removing modules until
// there are no further modules that can be removed.
bool made_progress = true;
while (made_progress) {
// Keep track if we make progress this iteration.
made_progress = false;
collection::iterator pos = m_modules.begin();
while (pos != m_modules.end()) {
if (pos->unique()) {
pos = RemoveImpl(pos);
++remove_count;
// We did make progress.
made_progress = true;
} else {
++pos;
}
}
}
return remove_count;
}
size_t ModuleList::Remove(ModuleList &module_list) {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
size_t num_removed = 0;
collection::iterator pos, end = module_list.m_modules.end();
for (pos = module_list.m_modules.begin(); pos != end; ++pos) {
if (Remove(*pos, false /* notify */))
++num_removed;
}
if (m_notifier)
m_notifier->NotifyModulesRemoved(module_list);
return num_removed;
}
void ModuleList::Clear() { ClearImpl(); }
void ModuleList::Destroy() { ClearImpl(); }
void ModuleList::ClearImpl(bool use_notifier) {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
if (use_notifier && m_notifier)
m_notifier->NotifyWillClearList(*this);
m_modules.clear();
}
Module *ModuleList::GetModulePointerAtIndex(size_t idx) const {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
if (idx < m_modules.size())
return m_modules[idx].get();
return nullptr;
}
ModuleSP ModuleList::GetModuleAtIndex(size_t idx) const {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
return GetModuleAtIndexUnlocked(idx);
}
ModuleSP ModuleList::GetModuleAtIndexUnlocked(size_t idx) const {
ModuleSP module_sp;
if (idx < m_modules.size())
module_sp = m_modules[idx];
return module_sp;
}
void ModuleList::FindFunctions(ConstString name,
FunctionNameType name_type_mask,
const ModuleFunctionSearchOptions &options,
SymbolContextList &sc_list) const {
const size_t old_size = sc_list.GetSize();
if (name_type_mask & eFunctionNameTypeAuto) {
Module::LookupInfo lookup_info(name, name_type_mask, eLanguageTypeUnknown);
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
for (const ModuleSP &module_sp : m_modules) {
module_sp->FindFunctions(lookup_info.GetLookupName(),
CompilerDeclContext(),
lookup_info.GetNameTypeMask(), options, sc_list);
}
const size_t new_size = sc_list.GetSize();
if (old_size < new_size)
lookup_info.Prune(sc_list, old_size);
} else {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
for (const ModuleSP &module_sp : m_modules) {
module_sp->FindFunctions(name, CompilerDeclContext(), name_type_mask,
options, sc_list);
}
}
}
void ModuleList::FindFunctionSymbols(ConstString name,
lldb::FunctionNameType name_type_mask,
SymbolContextList &sc_list) {
const size_t old_size = sc_list.GetSize();
if (name_type_mask & eFunctionNameTypeAuto) {
Module::LookupInfo lookup_info(name, name_type_mask, eLanguageTypeUnknown);
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
for (const ModuleSP &module_sp : m_modules) {
module_sp->FindFunctionSymbols(lookup_info.GetLookupName(),
lookup_info.GetNameTypeMask(), sc_list);
}
const size_t new_size = sc_list.GetSize();
if (old_size < new_size)
lookup_info.Prune(sc_list, old_size);
} else {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
for (const ModuleSP &module_sp : m_modules) {
module_sp->FindFunctionSymbols(name, name_type_mask, sc_list);
}
}
}
void ModuleList::FindFunctions(const RegularExpression &name,
const ModuleFunctionSearchOptions &options,
SymbolContextList &sc_list) {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
for (const ModuleSP &module_sp : m_modules)
module_sp->FindFunctions(name, options, sc_list);
}
void ModuleList::FindCompileUnits(const FileSpec &path,
SymbolContextList &sc_list) const {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
for (const ModuleSP &module_sp : m_modules)
module_sp->FindCompileUnits(path, sc_list);
}
void ModuleList::FindGlobalVariables(ConstString name, size_t max_matches,
VariableList &variable_list) const {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
for (const ModuleSP &module_sp : m_modules) {
module_sp->FindGlobalVariables(name, CompilerDeclContext(), max_matches,
variable_list);
}
}
void ModuleList::FindGlobalVariables(const RegularExpression &regex,
size_t max_matches,
VariableList &variable_list) const {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
for (const ModuleSP &module_sp : m_modules)
module_sp->FindGlobalVariables(regex, max_matches, variable_list);
}
void ModuleList::FindSymbolsWithNameAndType(ConstString name,
SymbolType symbol_type,
SymbolContextList &sc_list) const {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
for (const ModuleSP &module_sp : m_modules)
module_sp->FindSymbolsWithNameAndType(name, symbol_type, sc_list);
}
void ModuleList::FindSymbolsMatchingRegExAndType(
const RegularExpression &regex, lldb::SymbolType symbol_type,
SymbolContextList &sc_list) const {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
for (const ModuleSP &module_sp : m_modules)
module_sp->FindSymbolsMatchingRegExAndType(regex, symbol_type, sc_list);
}
void ModuleList::FindModules(const ModuleSpec &module_spec,
ModuleList &matching_module_list) const {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
for (const ModuleSP &module_sp : m_modules) {
if (module_sp->MatchesModuleSpec(module_spec))
matching_module_list.Append(module_sp);
}
}
ModuleSP ModuleList::FindModule(const Module *module_ptr) const {
ModuleSP module_sp;
// Scope for "locker"
{
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
collection::const_iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos) {
if ((*pos).get() == module_ptr) {
module_sp = (*pos);
break;
}
}
}
return module_sp;
}
ModuleSP ModuleList::FindModule(const UUID &uuid) const {
ModuleSP module_sp;
if (uuid.IsValid()) {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
collection::const_iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos) {
if ((*pos)->GetUUID() == uuid) {
module_sp = (*pos);
break;
}
}
}
return module_sp;
}
void ModuleList::FindTypes(Module *search_first, ConstString name,
bool name_is_fully_qualified, size_t max_matches,
llvm::DenseSet<SymbolFile *> &searched_symbol_files,
TypeList &types) const {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
collection::const_iterator pos, end = m_modules.end();
if (search_first) {
for (pos = m_modules.begin(); pos != end; ++pos) {
if (search_first == pos->get()) {
search_first->FindTypes(name, name_is_fully_qualified, max_matches,
searched_symbol_files, types);
if (types.GetSize() >= max_matches)
return;
}
}
}
for (pos = m_modules.begin(); pos != end; ++pos) {
// Search the module if the module is not equal to the one in the symbol
// context "sc". If "sc" contains a empty module shared pointer, then the
// comparison will always be true (valid_module_ptr != nullptr).
if (search_first != pos->get())
(*pos)->FindTypes(name, name_is_fully_qualified, max_matches,
searched_symbol_files, types);
if (types.GetSize() >= max_matches)
return;
}
}
bool ModuleList::FindSourceFile(const FileSpec &orig_spec,
FileSpec &new_spec) const {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
for (const ModuleSP &module_sp : m_modules) {
if (module_sp->FindSourceFile(orig_spec, new_spec))
return true;
}
return false;
}
void ModuleList::FindAddressesForLine(const lldb::TargetSP target_sp,
const FileSpec &file, uint32_t line,
Function *function,
std::vector<Address> &output_local,
std::vector<Address> &output_extern) {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
for (const ModuleSP &module_sp : m_modules) {
module_sp->FindAddressesForLine(target_sp, file, line, function,
output_local, output_extern);
}
}
ModuleSP ModuleList::FindFirstModule(const ModuleSpec &module_spec) const {
ModuleSP module_sp;
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
collection::const_iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos) {
ModuleSP module_sp(*pos);
if (module_sp->MatchesModuleSpec(module_spec))
return module_sp;
}
return module_sp;
}
size_t ModuleList::GetSize() const {
size_t size = 0;
{
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
size = m_modules.size();
}
return size;
}
void ModuleList::Dump(Stream *s) const {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
for (const ModuleSP &module_sp : m_modules)
module_sp->Dump(s);
}
void ModuleList::LogUUIDAndPaths(Log *log, const char *prefix_cstr) {
if (log != nullptr) {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
collection::const_iterator pos, begin = m_modules.begin(),
end = m_modules.end();
for (pos = begin; pos != end; ++pos) {
Module *module = pos->get();
const FileSpec &module_file_spec = module->GetFileSpec();
LLDB_LOGF(log, "%s[%u] %s (%s) \"%s\"", prefix_cstr ? prefix_cstr : "",
(uint32_t)std::distance(begin, pos),
module->GetUUID().GetAsString().c_str(),
module->GetArchitecture().GetArchitectureName(),
module_file_spec.GetPath().c_str());
}
}
}
bool ModuleList::ResolveFileAddress(lldb::addr_t vm_addr,
Address &so_addr) const {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
for (const ModuleSP &module_sp : m_modules) {
if (module_sp->ResolveFileAddress(vm_addr, so_addr))
return true;
}
return false;
}
uint32_t
ModuleList::ResolveSymbolContextForAddress(const Address &so_addr,
SymbolContextItem resolve_scope,
SymbolContext &sc) const {
// The address is already section offset so it has a module
uint32_t resolved_flags = 0;
ModuleSP module_sp(so_addr.GetModule());
if (module_sp) {
resolved_flags =
module_sp->ResolveSymbolContextForAddress(so_addr, resolve_scope, sc);
} else {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
collection::const_iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos) {
resolved_flags =
(*pos)->ResolveSymbolContextForAddress(so_addr, resolve_scope, sc);
if (resolved_flags != 0)
break;
}
}
return resolved_flags;
}
uint32_t ModuleList::ResolveSymbolContextForFilePath(
const char *file_path, uint32_t line, bool check_inlines,
SymbolContextItem resolve_scope, SymbolContextList &sc_list) const {
FileSpec file_spec(file_path);
return ResolveSymbolContextsForFileSpec(file_spec, line, check_inlines,
resolve_scope, sc_list);
}
uint32_t ModuleList::ResolveSymbolContextsForFileSpec(
const FileSpec &file_spec, uint32_t line, bool check_inlines,
SymbolContextItem resolve_scope, SymbolContextList &sc_list) const {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
for (const ModuleSP &module_sp : m_modules) {
module_sp->ResolveSymbolContextsForFileSpec(file_spec, line, check_inlines,
resolve_scope, sc_list);
}
return sc_list.GetSize();
}
size_t ModuleList::GetIndexForModule(const Module *module) const {
if (module) {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
collection::const_iterator pos;
collection::const_iterator begin = m_modules.begin();
collection::const_iterator end = m_modules.end();
for (pos = begin; pos != end; ++pos) {
if ((*pos).get() == module)
return std::distance(begin, pos);
}
}
return LLDB_INVALID_INDEX32;
}
namespace {
struct SharedModuleListInfo {
ModuleList module_list;
ModuleListProperties module_list_properties;
};
}
static SharedModuleListInfo &GetSharedModuleListInfo()
{
static SharedModuleListInfo *g_shared_module_list_info = nullptr;
static llvm::once_flag g_once_flag;
llvm::call_once(g_once_flag, []() {
// NOTE: Intentionally leak the module list so a program doesn't have to
// cleanup all modules and object files as it exits. This just wastes time
// doing a bunch of cleanup that isn't required.
if (g_shared_module_list_info == nullptr)
g_shared_module_list_info = new SharedModuleListInfo();
});
return *g_shared_module_list_info;
}
static ModuleList &GetSharedModuleList() {
return GetSharedModuleListInfo().module_list;
}
ModuleListProperties &ModuleList::GetGlobalModuleListProperties() {
return GetSharedModuleListInfo().module_list_properties;
}
bool ModuleList::ModuleIsInCache(const Module *module_ptr) {
if (module_ptr) {
ModuleList &shared_module_list = GetSharedModuleList();
return shared_module_list.FindModule(module_ptr).get() != nullptr;
}
return false;
}
void ModuleList::FindSharedModules(const ModuleSpec &module_spec,
ModuleList &matching_module_list) {
GetSharedModuleList().FindModules(module_spec, matching_module_list);
}
size_t ModuleList::RemoveOrphanSharedModules(bool mandatory) {
return GetSharedModuleList().RemoveOrphans(mandatory);
}
Status
ModuleList::GetSharedModule(const ModuleSpec &module_spec, ModuleSP &module_sp,
const FileSpecList *module_search_paths_ptr,
llvm::SmallVectorImpl<lldb::ModuleSP> *old_modules,
bool *did_create_ptr, bool always_create) {
ModuleList &shared_module_list = GetSharedModuleList();
std::lock_guard<std::recursive_mutex> guard(
shared_module_list.m_modules_mutex);
char path[PATH_MAX];
Status error;
module_sp.reset();
if (did_create_ptr)
*did_create_ptr = false;
const UUID *uuid_ptr = module_spec.GetUUIDPtr();
const FileSpec &module_file_spec = module_spec.GetFileSpec();
const ArchSpec &arch = module_spec.GetArchitecture();
// Make sure no one else can try and get or create a module while this
// function is actively working on it by doing an extra lock on the global
// mutex list.
if (!always_create) {
ModuleList matching_module_list;
shared_module_list.FindModules(module_spec, matching_module_list);
const size_t num_matching_modules = matching_module_list.GetSize();
if (num_matching_modules > 0) {
for (size_t module_idx = 0; module_idx < num_matching_modules;
++module_idx) {
module_sp = matching_module_list.GetModuleAtIndex(module_idx);
// Make sure the file for the module hasn't been modified
if (module_sp->FileHasChanged()) {
if (old_modules)
old_modules->push_back(module_sp);
Log *log(lldb_private::GetLogIfAnyCategoriesSet(LIBLLDB_LOG_MODULES));
if (log != nullptr)
LLDB_LOGF(
log, "%p '%s' module changed: removing from global module list",
static_cast<void *>(module_sp.get()),
module_sp->GetFileSpec().GetFilename().GetCString());
shared_module_list.Remove(module_sp);
module_sp.reset();
} else {
// The module matches and the module was not modified from when it
// was last loaded.
return error;
}
}
}
}
if (module_sp)
return error;
module_sp = std::make_shared<Module>(module_spec);
// Make sure there are a module and an object file since we can specify a
// valid file path with an architecture that might not be in that file. By
// getting the object file we can guarantee that the architecture matches
if (module_sp->GetObjectFile()) {
// If we get in here we got the correct arch, now we just need to verify
// the UUID if one was given
if (uuid_ptr && *uuid_ptr != module_sp->GetUUID()) {
module_sp.reset();
} else {
if (module_sp->GetObjectFile() &&
module_sp->GetObjectFile()->GetType() ==
ObjectFile::eTypeStubLibrary) {
module_sp.reset();
} else {
if (did_create_ptr) {
*did_create_ptr = true;
}
shared_module_list.ReplaceEquivalent(module_sp, old_modules);
return error;
}
}
} else {
module_sp.reset();
}
if (module_search_paths_ptr) {
const auto num_directories = module_search_paths_ptr->GetSize();
for (size_t idx = 0; idx < num_directories; ++idx) {
auto search_path_spec = module_search_paths_ptr->GetFileSpecAtIndex(idx);
FileSystem::Instance().Resolve(search_path_spec);
namespace fs = llvm::sys::fs;
if (!FileSystem::Instance().IsDirectory(search_path_spec))
continue;
search_path_spec.AppendPathComponent(
module_spec.GetFileSpec().GetFilename().GetStringRef());
if (!FileSystem::Instance().Exists(search_path_spec))
continue;
auto resolved_module_spec(module_spec);
resolved_module_spec.GetFileSpec() = search_path_spec;
module_sp = std::make_shared<Module>(resolved_module_spec);
if (module_sp->GetObjectFile()) {
// If we get in here we got the correct arch, now we just need to
// verify the UUID if one was given
if (uuid_ptr && *uuid_ptr != module_sp->GetUUID()) {
module_sp.reset();
} else {
if (module_sp->GetObjectFile()->GetType() ==
ObjectFile::eTypeStubLibrary) {
module_sp.reset();
} else {
if (did_create_ptr)
*did_create_ptr = true;
shared_module_list.ReplaceEquivalent(module_sp, old_modules);
return Status();
}
}
} else {
module_sp.reset();
}
}
}
// Either the file didn't exist where at the path, or no path was given, so
// we now have to use more extreme measures to try and find the appropriate
// module.
// Fixup the incoming path in case the path points to a valid file, yet the
// arch or UUID (if one was passed in) don't match.
ModuleSpec located_binary_modulespec =
Symbols::LocateExecutableObjectFile(module_spec);
// Don't look for the file if it appears to be the same one we already
// checked for above...
if (located_binary_modulespec.GetFileSpec() != module_file_spec) {
if (!FileSystem::Instance().Exists(
located_binary_modulespec.GetFileSpec())) {
located_binary_modulespec.GetFileSpec().GetPath(path, sizeof(path));
if (path[0] == '\0')
module_file_spec.GetPath(path, sizeof(path));
// How can this check ever be true? This branch it is false, and we
// haven't modified file_spec.
if (FileSystem::Instance().Exists(
located_binary_modulespec.GetFileSpec())) {
std::string uuid_str;
if (uuid_ptr && uuid_ptr->IsValid())
uuid_str = uuid_ptr->GetAsString();
if (arch.IsValid()) {
if (!uuid_str.empty())
error.SetErrorStringWithFormat(
"'%s' does not contain the %s architecture and UUID %s", path,
arch.GetArchitectureName(), uuid_str.c_str());
else
error.SetErrorStringWithFormat(
"'%s' does not contain the %s architecture.", path,
arch.GetArchitectureName());
}
} else {
error.SetErrorStringWithFormat("'%s' does not exist", path);
}
if (error.Fail())
module_sp.reset();
return error;
}
// Make sure no one else can try and get or create a module while this
// function is actively working on it by doing an extra lock on the global
// mutex list.
ModuleSpec platform_module_spec(module_spec);
platform_module_spec.GetFileSpec() =
located_binary_modulespec.GetFileSpec();
platform_module_spec.GetPlatformFileSpec() =
located_binary_modulespec.GetFileSpec();
platform_module_spec.GetSymbolFileSpec() =
located_binary_modulespec.GetSymbolFileSpec();
ModuleList matching_module_list;
shared_module_list.FindModules(platform_module_spec, matching_module_list);
if (!matching_module_list.IsEmpty()) {
module_sp = matching_module_list.GetModuleAtIndex(0);
// If we didn't have a UUID in mind when looking for the object file,
// then we should make sure the modification time hasn't changed!
if (platform_module_spec.GetUUIDPtr() == nullptr) {
auto file_spec_mod_time = FileSystem::Instance().GetModificationTime(
located_binary_modulespec.GetFileSpec());
if (file_spec_mod_time != llvm::sys::TimePoint<>()) {
if (file_spec_mod_time != module_sp->GetModificationTime()) {
if (old_modules)
old_modules->push_back(module_sp);
shared_module_list.Remove(module_sp);
module_sp.reset();
}
}
}
}
if (!module_sp) {
module_sp = std::make_shared<Module>(platform_module_spec);
// Make sure there are a module and an object file since we can specify a
// valid file path with an architecture that might not be in that file.
// By getting the object file we can guarantee that the architecture
// matches
if (module_sp && module_sp->GetObjectFile()) {
if (module_sp->GetObjectFile()->GetType() ==
ObjectFile::eTypeStubLibrary) {
module_sp.reset();
} else {
if (did_create_ptr)
*did_create_ptr = true;
shared_module_list.ReplaceEquivalent(module_sp, old_modules);
}
} else {
located_binary_modulespec.GetFileSpec().GetPath(path, sizeof(path));
if (located_binary_modulespec.GetFileSpec()) {
if (arch.IsValid())
error.SetErrorStringWithFormat(
"unable to open %s architecture in '%s'",
arch.GetArchitectureName(), path);
else
error.SetErrorStringWithFormat("unable to open '%s'", path);
} else {
std::string uuid_str;
if (uuid_ptr && uuid_ptr->IsValid())
uuid_str = uuid_ptr->GetAsString();
if (!uuid_str.empty())
error.SetErrorStringWithFormat(
"cannot locate a module for UUID '%s'", uuid_str.c_str());
else
error.SetErrorString("cannot locate a module");
}
}
}
}
return error;
}
bool ModuleList::RemoveSharedModule(lldb::ModuleSP &module_sp) {
return GetSharedModuleList().Remove(module_sp);
}
bool ModuleList::RemoveSharedModuleIfOrphaned(const Module *module_ptr) {
return GetSharedModuleList().RemoveIfOrphaned(module_ptr);
}
bool ModuleList::LoadScriptingResourcesInTarget(Target *target,
std::list<Status> &errors,
Stream *feedback_stream,
bool continue_on_error) {
if (!target)
return false;
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
for (auto module : m_modules) {
Status error;
if (module) {
if (!module->LoadScriptingResourceInTarget(target, error,
feedback_stream)) {
if (error.Fail() && error.AsCString()) {
error.SetErrorStringWithFormat("unable to load scripting data for "
"module %s - error reported was %s",
module->GetFileSpec()
.GetFileNameStrippingExtension()
.GetCString(),
error.AsCString());
errors.push_back(error);
if (!continue_on_error)
return false;
}
}
}
}
return errors.empty();
}
void ModuleList::ForEach(
std::function<bool(const ModuleSP &module_sp)> const &callback) const {
std::lock_guard<std::recursive_mutex> guard(m_modules_mutex);
for (const auto &module : m_modules) {
// If the callback returns false, then stop iterating and break out
if (!callback(module))
break;
}
}