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llvm-project/lldb/source/Core/Module.cpp

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//===-- Module.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/AddressRange.h"
#include "lldb/Core/AddressResolverFileLine.h"
#include "lldb/Core/DataFileCache.h"
#include "lldb/Core/Debugger.h"
#include "lldb/Core/FileSpecList.h"
#include "lldb/Core/Mangled.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Core/SearchFilter.h"
#include "lldb/Core/Section.h"
#include "lldb/Host/FileSystem.h"
#include "lldb/Host/Host.h"
#include "lldb/Host/HostInfo.h"
#include "lldb/Interpreter/CommandInterpreter.h"
#include "lldb/Interpreter/ScriptInterpreter.h"
#include "lldb/Symbol/CompileUnit.h"
#include "lldb/Symbol/Function.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/Symbol.h"
#include "lldb/Symbol/SymbolContext.h"
#include "lldb/Symbol/SymbolFile.h"
#include "lldb/Symbol/SymbolVendor.h"
#include "lldb/Symbol/Symtab.h"
#include "lldb/Symbol/Type.h"
#include "lldb/Symbol/TypeList.h"
#include "lldb/Symbol/TypeMap.h"
#include "lldb/Symbol/TypeSystem.h"
#include "lldb/Target/Language.h"
#include "lldb/Target/Process.h"
#include "lldb/Target/Target.h"
#include "lldb/Utility/DataBufferHeap.h"
#include "lldb/Utility/LLDBAssert.h"
#include "lldb/Utility/LLDBLog.h"
#include "lldb/Utility/Log.h"
#include "lldb/Utility/RegularExpression.h"
#include "lldb/Utility/Status.h"
#include "lldb/Utility/Stream.h"
#include "lldb/Utility/StreamString.h"
#include "lldb/Utility/Timer.h"
#if defined(_WIN32)
#include "lldb/Host/windows/PosixApi.h"
#endif
#include "Plugins/Language/CPlusPlus/CPlusPlusLanguage.h"
#include "Plugins/Language/ObjC/ObjCLanguage.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/DJB.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/FormatVariadic.h"
#include "llvm/Support/JSON.h"
#include "llvm/Support/Signals.h"
#include "llvm/Support/raw_ostream.h"
#include <cassert>
#include <cinttypes>
#include <cstdarg>
#include <cstdint>
#include <cstring>
#include <map>
#include <type_traits>
#include <utility>
namespace lldb_private {
class CompilerDeclContext;
}
namespace lldb_private {
class VariableList;
}
using namespace lldb;
using namespace lldb_private;
// Shared pointers to modules track module lifetimes in targets and in the
// global module, but this collection will track all module objects that are
// still alive
typedef std::vector<Module *> ModuleCollection;
static ModuleCollection &GetModuleCollection() {
// This module collection needs to live past any module, so we could either
// make it a shared pointer in each module or just leak is. Since it is only
// an empty vector by the time all the modules have gone away, we just leak
// it for now. If we decide this is a big problem we can introduce a
// Finalize method that will tear everything down in a predictable order.
static ModuleCollection *g_module_collection = nullptr;
if (g_module_collection == nullptr)
g_module_collection = new ModuleCollection();
return *g_module_collection;
}
std::recursive_mutex &Module::GetAllocationModuleCollectionMutex() {
// NOTE: The mutex below must be leaked since the global module list in
// the ModuleList class will get torn at some point, and we can't know if it
// will tear itself down before the "g_module_collection_mutex" below will.
// So we leak a Mutex object below to safeguard against that
static std::recursive_mutex *g_module_collection_mutex = nullptr;
if (g_module_collection_mutex == nullptr)
g_module_collection_mutex = new std::recursive_mutex; // NOTE: known leak
return *g_module_collection_mutex;
}
size_t Module::GetNumberAllocatedModules() {
std::lock_guard<std::recursive_mutex> guard(
GetAllocationModuleCollectionMutex());
return GetModuleCollection().size();
}
Module *Module::GetAllocatedModuleAtIndex(size_t idx) {
std::lock_guard<std::recursive_mutex> guard(
GetAllocationModuleCollectionMutex());
ModuleCollection &modules = GetModuleCollection();
if (idx < modules.size())
return modules[idx];
return nullptr;
}
Module::Module(const ModuleSpec &module_spec)
: m_file_has_changed(false), m_first_file_changed_log(false) {
// Scope for locker below...
{
std::lock_guard<std::recursive_mutex> guard(
GetAllocationModuleCollectionMutex());
GetModuleCollection().push_back(this);
}
Log *log(GetLog(LLDBLog::Object | LLDBLog::Modules));
if (log != nullptr)
LLDB_LOGF(log, "%p Module::Module((%s) '%s%s%s%s')",
static_cast<void *>(this),
module_spec.GetArchitecture().GetArchitectureName(),
module_spec.GetFileSpec().GetPath().c_str(),
module_spec.GetObjectName().IsEmpty() ? "" : "(",
module_spec.GetObjectName().IsEmpty()
? ""
: module_spec.GetObjectName().AsCString(""),
module_spec.GetObjectName().IsEmpty() ? "" : ")");
auto data_sp = module_spec.GetData();
lldb::offset_t file_size = 0;
if (data_sp)
file_size = data_sp->GetByteSize();
// First extract all module specifications from the file using the local file
// path. If there are no specifications, then don't fill anything in
ModuleSpecList modules_specs;
if (ObjectFile::GetModuleSpecifications(
module_spec.GetFileSpec(), 0, file_size, modules_specs, data_sp) == 0)
return;
// Now make sure that one of the module specifications matches what we just
// extract. We might have a module specification that specifies a file
// "/usr/lib/dyld" with UUID XXX, but we might have a local version of
// "/usr/lib/dyld" that has
// UUID YYY and we don't want those to match. If they don't match, just don't
// fill any ivars in so we don't accidentally grab the wrong file later since
// they don't match...
ModuleSpec matching_module_spec;
if (!modules_specs.FindMatchingModuleSpec(module_spec,
matching_module_spec)) {
if (log) {
LLDB_LOGF(log, "Found local object file but the specs didn't match");
}
return;
}
// Set m_data_sp if it was initially provided in the ModuleSpec. Note that
// we cannot use the data_sp variable here, because it will have been
// modified by GetModuleSpecifications().
if (auto module_spec_data_sp = module_spec.GetData()) {
m_data_sp = module_spec_data_sp;
m_mod_time = {};
} else {
if (module_spec.GetFileSpec())
m_mod_time =
FileSystem::Instance().GetModificationTime(module_spec.GetFileSpec());
else if (matching_module_spec.GetFileSpec())
m_mod_time = FileSystem::Instance().GetModificationTime(
matching_module_spec.GetFileSpec());
}
// Copy the architecture from the actual spec if we got one back, else use
// the one that was specified
if (matching_module_spec.GetArchitecture().IsValid())
m_arch = matching_module_spec.GetArchitecture();
else if (module_spec.GetArchitecture().IsValid())
m_arch = module_spec.GetArchitecture();
// Copy the file spec over and use the specified one (if there was one) so we
// don't use a path that might have gotten resolved a path in
// 'matching_module_spec'
if (module_spec.GetFileSpec())
m_file = module_spec.GetFileSpec();
else if (matching_module_spec.GetFileSpec())
m_file = matching_module_spec.GetFileSpec();
// Copy the platform file spec over
if (module_spec.GetPlatformFileSpec())
m_platform_file = module_spec.GetPlatformFileSpec();
else if (matching_module_spec.GetPlatformFileSpec())
m_platform_file = matching_module_spec.GetPlatformFileSpec();
// Copy the symbol file spec over
if (module_spec.GetSymbolFileSpec())
m_symfile_spec = module_spec.GetSymbolFileSpec();
else if (matching_module_spec.GetSymbolFileSpec())
m_symfile_spec = matching_module_spec.GetSymbolFileSpec();
// Copy the object name over
if (matching_module_spec.GetObjectName())
m_object_name = matching_module_spec.GetObjectName();
else
m_object_name = module_spec.GetObjectName();
// Always trust the object offset (file offset) and object modification time
// (for mod time in a BSD static archive) of from the matching module
// specification
m_object_offset = matching_module_spec.GetObjectOffset();
m_object_mod_time = matching_module_spec.GetObjectModificationTime();
}
Module::Module(const FileSpec &file_spec, const ArchSpec &arch,
const ConstString *object_name, lldb::offset_t object_offset,
const llvm::sys::TimePoint<> &object_mod_time)
: m_mod_time(FileSystem::Instance().GetModificationTime(file_spec)),
m_arch(arch), m_file(file_spec), m_object_offset(object_offset),
m_object_mod_time(object_mod_time), m_file_has_changed(false),
m_first_file_changed_log(false) {
// Scope for locker below...
{
std::lock_guard<std::recursive_mutex> guard(
GetAllocationModuleCollectionMutex());
GetModuleCollection().push_back(this);
}
if (object_name)
m_object_name = *object_name;
Log *log(GetLog(LLDBLog::Object | LLDBLog::Modules));
if (log != nullptr)
LLDB_LOGF(log, "%p Module::Module((%s) '%s%s%s%s')",
static_cast<void *>(this), m_arch.GetArchitectureName(),
m_file.GetPath().c_str(), m_object_name.IsEmpty() ? "" : "(",
m_object_name.IsEmpty() ? "" : m_object_name.AsCString(""),
m_object_name.IsEmpty() ? "" : ")");
}
Module::Module() : m_file_has_changed(false), m_first_file_changed_log(false) {
std::lock_guard<std::recursive_mutex> guard(
GetAllocationModuleCollectionMutex());
GetModuleCollection().push_back(this);
}
Module::~Module() {
// Lock our module down while we tear everything down to make sure we don't
// get any access to the module while it is being destroyed
std::lock_guard<std::recursive_mutex> guard(m_mutex);
// Scope for locker below...
{
std::lock_guard<std::recursive_mutex> guard(
GetAllocationModuleCollectionMutex());
ModuleCollection &modules = GetModuleCollection();
ModuleCollection::iterator end = modules.end();
ModuleCollection::iterator pos = std::find(modules.begin(), end, this);
assert(pos != end);
modules.erase(pos);
}
Log *log(GetLog(LLDBLog::Object | LLDBLog::Modules));
if (log != nullptr)
LLDB_LOGF(log, "%p Module::~Module((%s) '%s%s%s%s')",
static_cast<void *>(this), m_arch.GetArchitectureName(),
m_file.GetPath().c_str(), m_object_name.IsEmpty() ? "" : "(",
m_object_name.IsEmpty() ? "" : m_object_name.AsCString(""),
m_object_name.IsEmpty() ? "" : ")");
// Release any auto pointers before we start tearing down our member
// variables since the object file and symbol files might need to make
// function calls back into this module object. The ordering is important
// here because symbol files can require the module object file. So we tear
// down the symbol file first, then the object file.
m_sections_up.reset();
m_symfile_up.reset();
m_objfile_sp.reset();
}
ObjectFile *Module::GetMemoryObjectFile(const lldb::ProcessSP &process_sp,
lldb::addr_t header_addr, Status &error,
size_t size_to_read) {
if (m_objfile_sp) {
error.SetErrorString("object file already exists");
} else {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (process_sp) {
m_did_load_objfile = true;
std::shared_ptr<DataBufferHeap> data_sp =
std::make_shared<DataBufferHeap>(size_to_read, 0);
Status readmem_error;
const size_t bytes_read =
process_sp->ReadMemory(header_addr, data_sp->GetBytes(),
data_sp->GetByteSize(), readmem_error);
if (bytes_read < size_to_read)
data_sp->SetByteSize(bytes_read);
if (data_sp->GetByteSize() > 0) {
m_objfile_sp = ObjectFile::FindPlugin(shared_from_this(), process_sp,
header_addr, data_sp);
if (m_objfile_sp) {
StreamString s;
s.Printf("0x%16.16" PRIx64, header_addr);
m_object_name.SetString(s.GetString());
// Once we get the object file, update our module with the object
// file's architecture since it might differ in vendor/os if some
// parts were unknown.
m_arch = m_objfile_sp->GetArchitecture();
// Augment the arch with the target's information in case
// we are unable to extract the os/environment from memory.
m_arch.MergeFrom(process_sp->GetTarget().GetArchitecture());
} else {
error.SetErrorString("unable to find suitable object file plug-in");
}
} else {
error.SetErrorStringWithFormat("unable to read header from memory: %s",
readmem_error.AsCString());
}
} else {
error.SetErrorString("invalid process");
}
}
return m_objfile_sp.get();
}
const lldb_private::UUID &Module::GetUUID() {
if (!m_did_set_uuid.load()) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (!m_did_set_uuid.load()) {
ObjectFile *obj_file = GetObjectFile();
if (obj_file != nullptr) {
m_uuid = obj_file->GetUUID();
m_did_set_uuid = true;
}
}
}
return m_uuid;
}
void Module::SetUUID(const lldb_private::UUID &uuid) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (!m_did_set_uuid) {
m_uuid = uuid;
m_did_set_uuid = true;
} else {
lldbassert(0 && "Attempting to overwrite the existing module UUID");
}
}
llvm::Expected<TypeSystem &>
Module::GetTypeSystemForLanguage(LanguageType language) {
return m_type_system_map.GetTypeSystemForLanguage(language, this, true);
}
void Module::ParseAllDebugSymbols() {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
size_t num_comp_units = GetNumCompileUnits();
if (num_comp_units == 0)
return;
SymbolFile *symbols = GetSymbolFile();
for (size_t cu_idx = 0; cu_idx < num_comp_units; cu_idx++) {
SymbolContext sc;
sc.module_sp = shared_from_this();
sc.comp_unit = symbols->GetCompileUnitAtIndex(cu_idx).get();
if (!sc.comp_unit)
continue;
symbols->ParseVariablesForContext(sc);
symbols->ParseFunctions(*sc.comp_unit);
sc.comp_unit->ForeachFunction([&sc, &symbols](const FunctionSP &f) {
symbols->ParseBlocksRecursive(*f);
// Parse the variables for this function and all its blocks
sc.function = f.get();
symbols->ParseVariablesForContext(sc);
return false;
});
// Parse all types for this compile unit
symbols->ParseTypes(*sc.comp_unit);
}
}
void Module::CalculateSymbolContext(SymbolContext *sc) {
sc->module_sp = shared_from_this();
}
ModuleSP Module::CalculateSymbolContextModule() { return shared_from_this(); }
void Module::DumpSymbolContext(Stream *s) {
s->Printf(", Module{%p}", static_cast<void *>(this));
}
size_t Module::GetNumCompileUnits() {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
LLDB_SCOPED_TIMERF("Module::GetNumCompileUnits (module = %p)",
static_cast<void *>(this));
if (SymbolFile *symbols = GetSymbolFile())
return symbols->GetNumCompileUnits();
return 0;
}
CompUnitSP Module::GetCompileUnitAtIndex(size_t index) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
size_t num_comp_units = GetNumCompileUnits();
CompUnitSP cu_sp;
if (index < num_comp_units) {
if (SymbolFile *symbols = GetSymbolFile())
cu_sp = symbols->GetCompileUnitAtIndex(index);
}
return cu_sp;
}
bool Module::ResolveFileAddress(lldb::addr_t vm_addr, Address &so_addr) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
SectionList *section_list = GetSectionList();
if (section_list)
return so_addr.ResolveAddressUsingFileSections(vm_addr, section_list);
return false;
}
uint32_t Module::ResolveSymbolContextForAddress(
const Address &so_addr, lldb::SymbolContextItem resolve_scope,
SymbolContext &sc, bool resolve_tail_call_address) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
uint32_t resolved_flags = 0;
// Clear the result symbol context in case we don't find anything, but don't
// clear the target
sc.Clear(false);
// Get the section from the section/offset address.
SectionSP section_sp(so_addr.GetSection());
// Make sure the section matches this module before we try and match anything
if (section_sp && section_sp->GetModule().get() == this) {
// If the section offset based address resolved itself, then this is the
// right module.
sc.module_sp = shared_from_this();
resolved_flags |= eSymbolContextModule;
SymbolFile *symfile = GetSymbolFile();
if (!symfile)
return resolved_flags;
// Resolve the compile unit, function, block, line table or line entry if
// requested.
if (resolve_scope & eSymbolContextCompUnit ||
resolve_scope & eSymbolContextFunction ||
resolve_scope & eSymbolContextBlock ||
resolve_scope & eSymbolContextLineEntry ||
resolve_scope & eSymbolContextVariable) {
symfile->SetLoadDebugInfoEnabled();
resolved_flags |=
symfile->ResolveSymbolContext(so_addr, resolve_scope, sc);
}
// Resolve the symbol if requested, but don't re-look it up if we've
// already found it.
if (resolve_scope & eSymbolContextSymbol &&
!(resolved_flags & eSymbolContextSymbol)) {
Symtab *symtab = symfile->GetSymtab();
if (symtab && so_addr.IsSectionOffset()) {
Symbol *matching_symbol = nullptr;
symtab->ForEachSymbolContainingFileAddress(
so_addr.GetFileAddress(),
[&matching_symbol](Symbol *symbol) -> bool {
if (symbol->GetType() != eSymbolTypeInvalid) {
matching_symbol = symbol;
return false; // Stop iterating
}
return true; // Keep iterating
});
sc.symbol = matching_symbol;
if (!sc.symbol && resolve_scope & eSymbolContextFunction &&
!(resolved_flags & eSymbolContextFunction)) {
bool verify_unique = false; // No need to check again since
// ResolveSymbolContext failed to find a
// symbol at this address.
if (ObjectFile *obj_file = sc.module_sp->GetObjectFile())
sc.symbol =
obj_file->ResolveSymbolForAddress(so_addr, verify_unique);
}
if (sc.symbol) {
if (sc.symbol->IsSynthetic()) {
// We have a synthetic symbol so lets check if the object file from
// the symbol file in the symbol vendor is different than the
// object file for the module, and if so search its symbol table to
// see if we can come up with a better symbol. For example dSYM
// files on MacOSX have an unstripped symbol table inside of them.
ObjectFile *symtab_objfile = symtab->GetObjectFile();
if (symtab_objfile && symtab_objfile->IsStripped()) {
ObjectFile *symfile_objfile = symfile->GetObjectFile();
if (symfile_objfile != symtab_objfile) {
Symtab *symfile_symtab = symfile_objfile->GetSymtab();
if (symfile_symtab) {
Symbol *symbol =
symfile_symtab->FindSymbolContainingFileAddress(
so_addr.GetFileAddress());
if (symbol && !symbol->IsSynthetic()) {
sc.symbol = symbol;
}
}
}
}
}
resolved_flags |= eSymbolContextSymbol;
}
}
}
// For function symbols, so_addr may be off by one. This is a convention
// consistent with FDE row indices in eh_frame sections, but requires extra
// logic here to permit symbol lookup for disassembly and unwind.
if (resolve_scope & eSymbolContextSymbol &&
!(resolved_flags & eSymbolContextSymbol) && resolve_tail_call_address &&
so_addr.IsSectionOffset()) {
Address previous_addr = so_addr;
previous_addr.Slide(-1);
bool do_resolve_tail_call_address = false; // prevent recursion
const uint32_t flags = ResolveSymbolContextForAddress(
previous_addr, resolve_scope, sc, do_resolve_tail_call_address);
if (flags & eSymbolContextSymbol) {
AddressRange addr_range;
if (sc.GetAddressRange(eSymbolContextFunction | eSymbolContextSymbol, 0,
false, addr_range)) {
if (addr_range.GetBaseAddress().GetSection() ==
so_addr.GetSection()) {
// If the requested address is one past the address range of a
// function (i.e. a tail call), or the decremented address is the
// start of a function (i.e. some forms of trampoline), indicate
// that the symbol has been resolved.
if (so_addr.GetOffset() ==
addr_range.GetBaseAddress().GetOffset() ||
so_addr.GetOffset() == addr_range.GetBaseAddress().GetOffset() +
addr_range.GetByteSize()) {
resolved_flags |= flags;
}
} else {
sc.symbol =
nullptr; // Don't trust the symbol if the sections didn't match.
}
}
}
}
}
return resolved_flags;
}
uint32_t Module::ResolveSymbolContextForFilePath(
const char *file_path, uint32_t line, bool check_inlines,
lldb::SymbolContextItem resolve_scope, SymbolContextList &sc_list) {
FileSpec file_spec(file_path);
return ResolveSymbolContextsForFileSpec(file_spec, line, check_inlines,
resolve_scope, sc_list);
}
uint32_t Module::ResolveSymbolContextsForFileSpec(
const FileSpec &file_spec, uint32_t line, bool check_inlines,
lldb::SymbolContextItem resolve_scope, SymbolContextList &sc_list) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
LLDB_SCOPED_TIMERF("Module::ResolveSymbolContextForFilePath (%s:%u, "
"check_inlines = %s, resolve_scope = 0x%8.8x)",
file_spec.GetPath().c_str(), line,
check_inlines ? "yes" : "no", resolve_scope);
const uint32_t initial_count = sc_list.GetSize();
if (SymbolFile *symbols = GetSymbolFile()) {
// TODO: Handle SourceLocationSpec column information
SourceLocationSpec location_spec(file_spec, line, /*column=*/llvm::None,
check_inlines, /*exact_match=*/false);
symbols->ResolveSymbolContext(location_spec, resolve_scope, sc_list);
}
return sc_list.GetSize() - initial_count;
}
void Module::FindGlobalVariables(ConstString name,
const CompilerDeclContext &parent_decl_ctx,
size_t max_matches, VariableList &variables) {
if (SymbolFile *symbols = GetSymbolFile())
symbols->FindGlobalVariables(name, parent_decl_ctx, max_matches, variables);
}
void Module::FindGlobalVariables(const RegularExpression &regex,
size_t max_matches, VariableList &variables) {
SymbolFile *symbols = GetSymbolFile();
if (symbols)
symbols->FindGlobalVariables(regex, max_matches, variables);
}
void Module::FindCompileUnits(const FileSpec &path,
SymbolContextList &sc_list) {
const size_t num_compile_units = GetNumCompileUnits();
SymbolContext sc;
sc.module_sp = shared_from_this();
for (size_t i = 0; i < num_compile_units; ++i) {
sc.comp_unit = GetCompileUnitAtIndex(i).get();
if (sc.comp_unit) {
if (FileSpec::Match(path, sc.comp_unit->GetPrimaryFile()))
sc_list.Append(sc);
}
}
}
Module::LookupInfo::LookupInfo(ConstString name,
FunctionNameType name_type_mask,
LanguageType language)
: m_name(name), m_lookup_name(), m_language(language) {
const char *name_cstr = name.GetCString();
llvm::StringRef basename;
llvm::StringRef context;
if (name_type_mask & eFunctionNameTypeAuto) {
if (CPlusPlusLanguage::IsCPPMangledName(name_cstr))
m_name_type_mask = eFunctionNameTypeFull;
else if ((language == eLanguageTypeUnknown ||
Language::LanguageIsObjC(language)) &&
ObjCLanguage::IsPossibleObjCMethodName(name_cstr))
m_name_type_mask = eFunctionNameTypeFull;
else if (Language::LanguageIsC(language)) {
m_name_type_mask = eFunctionNameTypeFull;
} else {
if ((language == eLanguageTypeUnknown ||
Language::LanguageIsObjC(language)) &&
ObjCLanguage::IsPossibleObjCSelector(name_cstr))
m_name_type_mask |= eFunctionNameTypeSelector;
CPlusPlusLanguage::MethodName cpp_method(name);
basename = cpp_method.GetBasename();
if (basename.empty()) {
if (CPlusPlusLanguage::ExtractContextAndIdentifier(name_cstr, context,
basename))
m_name_type_mask |= (eFunctionNameTypeMethod | eFunctionNameTypeBase);
else
m_name_type_mask |= eFunctionNameTypeFull;
} else {
m_name_type_mask |= (eFunctionNameTypeMethod | eFunctionNameTypeBase);
}
}
} else {
m_name_type_mask = name_type_mask;
if (name_type_mask & eFunctionNameTypeMethod ||
name_type_mask & eFunctionNameTypeBase) {
// If they've asked for a CPP method or function name and it can't be
// that, we don't even need to search for CPP methods or names.
CPlusPlusLanguage::MethodName cpp_method(name);
if (cpp_method.IsValid()) {
basename = cpp_method.GetBasename();
if (!cpp_method.GetQualifiers().empty()) {
// There is a "const" or other qualifier following the end of the
// function parens, this can't be a eFunctionNameTypeBase
m_name_type_mask &= ~(eFunctionNameTypeBase);
if (m_name_type_mask == eFunctionNameTypeNone)
return;
}
} else {
// If the CPP method parser didn't manage to chop this up, try to fill
// in the base name if we can. If a::b::c is passed in, we need to just
// look up "c", and then we'll filter the result later.
CPlusPlusLanguage::ExtractContextAndIdentifier(name_cstr, context,
basename);
}
}
if (name_type_mask & eFunctionNameTypeSelector) {
if (!ObjCLanguage::IsPossibleObjCSelector(name_cstr)) {
m_name_type_mask &= ~(eFunctionNameTypeSelector);
if (m_name_type_mask == eFunctionNameTypeNone)
return;
}
}
// Still try and get a basename in case someone specifies a name type mask
// of eFunctionNameTypeFull and a name like "A::func"
if (basename.empty()) {
if (name_type_mask & eFunctionNameTypeFull &&
!CPlusPlusLanguage::IsCPPMangledName(name_cstr)) {
CPlusPlusLanguage::MethodName cpp_method(name);
basename = cpp_method.GetBasename();
if (basename.empty())
CPlusPlusLanguage::ExtractContextAndIdentifier(name_cstr, context,
basename);
}
}
}
if (!basename.empty()) {
// The name supplied was a partial C++ path like "a::count". In this case
// we want to do a lookup on the basename "count" and then make sure any
// matching results contain "a::count" so that it would match "b::a::count"
// and "a::count". This is why we set "match_name_after_lookup" to true
m_lookup_name.SetString(basename);
m_match_name_after_lookup = true;
} else {
// The name is already correct, just use the exact name as supplied, and we
// won't need to check if any matches contain "name"
m_lookup_name = name;
m_match_name_after_lookup = false;
}
}
void Module::LookupInfo::Prune(SymbolContextList &sc_list,
size_t start_idx) const {
if (m_match_name_after_lookup && m_name) {
SymbolContext sc;
size_t i = start_idx;
while (i < sc_list.GetSize()) {
if (!sc_list.GetContextAtIndex(i, sc))
break;
llvm::StringRef user_name = m_name.GetStringRef();
bool keep_it = true;
Language *language = Language::FindPlugin(sc.GetLanguage());
// If the symbol has a language, then let the language make the match.
// Otherwise just check that the demangled name contains the user name.
if (language)
keep_it = language->DemangledNameContainsPath(m_name.GetStringRef(),
sc.GetFunctionName());
else {
llvm::StringRef full_name = sc.GetFunctionName().GetStringRef();
// We always keep unnamed symbols:
if (!full_name.empty())
keep_it = full_name.contains(user_name);
}
if (keep_it)
++i;
else
sc_list.RemoveContextAtIndex(i);
}
}
// If we have only full name matches we might have tried to set breakpoint on
// "func" and specified eFunctionNameTypeFull, but we might have found
// "a::func()", "a::b::func()", "c::func()", "func()" and "func". Only
// "func()" and "func" should end up matching.
if (m_name_type_mask == eFunctionNameTypeFull) {
SymbolContext sc;
size_t i = start_idx;
while (i < sc_list.GetSize()) {
if (!sc_list.GetContextAtIndex(i, sc))
break;
// Make sure the mangled and demangled names don't match before we try to
// pull anything out
ConstString mangled_name(sc.GetFunctionName(Mangled::ePreferMangled));
ConstString full_name(sc.GetFunctionName());
if (mangled_name != m_name && full_name != m_name) {
CPlusPlusLanguage::MethodName cpp_method(full_name);
if (cpp_method.IsValid()) {
if (cpp_method.GetContext().empty()) {
if (cpp_method.GetBasename().compare(m_name.GetStringRef()) != 0) {
sc_list.RemoveContextAtIndex(i);
continue;
}
} else {
std::string qualified_name;
llvm::StringRef anon_prefix("(anonymous namespace)");
if (cpp_method.GetContext() == anon_prefix)
qualified_name = cpp_method.GetBasename().str();
else
qualified_name = cpp_method.GetScopeQualifiedName();
if (qualified_name != m_name.GetCString()) {
sc_list.RemoveContextAtIndex(i);
continue;
}
}
}
}
++i;
}
}
}
void Module::FindFunctions(ConstString name,
const CompilerDeclContext &parent_decl_ctx,
FunctionNameType name_type_mask,
const ModuleFunctionSearchOptions &options,
SymbolContextList &sc_list) {
const size_t old_size = sc_list.GetSize();
// Find all the functions (not symbols, but debug information functions...
SymbolFile *symbols = GetSymbolFile();
if (name_type_mask & eFunctionNameTypeAuto) {
LookupInfo lookup_info(name, name_type_mask, eLanguageTypeUnknown);
if (symbols) {
symbols->FindFunctions(lookup_info.GetLookupName(), parent_decl_ctx,
lookup_info.GetNameTypeMask(),
options.include_inlines, sc_list);
// Now check our symbol table for symbols that are code symbols if
// requested
if (options.include_symbols) {
Symtab *symtab = symbols->GetSymtab();
if (symtab)
symtab->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 {
if (symbols) {
symbols->FindFunctions(name, parent_decl_ctx, name_type_mask,
options.include_inlines, sc_list);
// Now check our symbol table for symbols that are code symbols if
// requested
if (options.include_symbols) {
Symtab *symtab = symbols->GetSymtab();
if (symtab)
symtab->FindFunctionSymbols(name, name_type_mask, sc_list);
}
}
}
}
void Module::FindFunctions(const RegularExpression &regex,
const ModuleFunctionSearchOptions &options,
SymbolContextList &sc_list) {
const size_t start_size = sc_list.GetSize();
if (SymbolFile *symbols = GetSymbolFile()) {
symbols->FindFunctions(regex, options.include_inlines, sc_list);
// Now check our symbol table for symbols that are code symbols if
// requested
if (options.include_symbols) {
Symtab *symtab = symbols->GetSymtab();
if (symtab) {
std::vector<uint32_t> symbol_indexes;
symtab->AppendSymbolIndexesMatchingRegExAndType(
regex, eSymbolTypeAny, Symtab::eDebugAny, Symtab::eVisibilityAny,
symbol_indexes);
const size_t num_matches = symbol_indexes.size();
if (num_matches) {
SymbolContext sc(this);
const size_t end_functions_added_index = sc_list.GetSize();
size_t num_functions_added_to_sc_list =
end_functions_added_index - start_size;
if (num_functions_added_to_sc_list == 0) {
// No functions were added, just symbols, so we can just append
// them
for (size_t i = 0; i < num_matches; ++i) {
sc.symbol = symtab->SymbolAtIndex(symbol_indexes[i]);
SymbolType sym_type = sc.symbol->GetType();
if (sc.symbol && (sym_type == eSymbolTypeCode ||
sym_type == eSymbolTypeResolver))
sc_list.Append(sc);
}
} else {
typedef std::map<lldb::addr_t, uint32_t> FileAddrToIndexMap;
FileAddrToIndexMap file_addr_to_index;
for (size_t i = start_size; i < end_functions_added_index; ++i) {
const SymbolContext &sc = sc_list[i];
if (sc.block)
continue;
file_addr_to_index[sc.function->GetAddressRange()
.GetBaseAddress()
.GetFileAddress()] = i;
}
FileAddrToIndexMap::const_iterator end = file_addr_to_index.end();
// Functions were added so we need to merge symbols into any
// existing function symbol contexts
for (size_t i = start_size; i < num_matches; ++i) {
sc.symbol = symtab->SymbolAtIndex(symbol_indexes[i]);
SymbolType sym_type = sc.symbol->GetType();
if (sc.symbol && sc.symbol->ValueIsAddress() &&
(sym_type == eSymbolTypeCode ||
sym_type == eSymbolTypeResolver)) {
FileAddrToIndexMap::const_iterator pos =
file_addr_to_index.find(
sc.symbol->GetAddressRef().GetFileAddress());
if (pos == end)
sc_list.Append(sc);
else
sc_list[pos->second].symbol = sc.symbol;
}
}
}
}
}
}
}
}
void Module::FindAddressesForLine(const lldb::TargetSP target_sp,
const FileSpec &file, uint32_t line,
Function *function,
std::vector<Address> &output_local,
std::vector<Address> &output_extern) {
SearchFilterByModule filter(target_sp, m_file);
// TODO: Handle SourceLocationSpec column information
SourceLocationSpec location_spec(file, line, /*column=*/llvm::None,
/*check_inlines=*/true,
/*exact_match=*/false);
AddressResolverFileLine resolver(location_spec);
resolver.ResolveAddress(filter);
for (size_t n = 0; n < resolver.GetNumberOfAddresses(); n++) {
Address addr = resolver.GetAddressRangeAtIndex(n).GetBaseAddress();
Function *f = addr.CalculateSymbolContextFunction();
if (f && f == function)
output_local.push_back(addr);
else
output_extern.push_back(addr);
}
}
void Module::FindTypes_Impl(
ConstString name, const CompilerDeclContext &parent_decl_ctx,
size_t max_matches,
llvm::DenseSet<lldb_private::SymbolFile *> &searched_symbol_files,
TypeMap &types) {
if (SymbolFile *symbols = GetSymbolFile())
symbols->FindTypes(name, parent_decl_ctx, max_matches,
searched_symbol_files, types);
}
void Module::FindTypesInNamespace(ConstString type_name,
const CompilerDeclContext &parent_decl_ctx,
size_t max_matches, TypeList &type_list) {
TypeMap types_map;
llvm::DenseSet<lldb_private::SymbolFile *> searched_symbol_files;
FindTypes_Impl(type_name, parent_decl_ctx, max_matches, searched_symbol_files,
types_map);
if (types_map.GetSize()) {
SymbolContext sc;
sc.module_sp = shared_from_this();
sc.SortTypeList(types_map, type_list);
}
}
lldb::TypeSP Module::FindFirstType(const SymbolContext &sc, ConstString name,
bool exact_match) {
TypeList type_list;
llvm::DenseSet<lldb_private::SymbolFile *> searched_symbol_files;
FindTypes(name, exact_match, 1, searched_symbol_files, type_list);
if (type_list.GetSize())
return type_list.GetTypeAtIndex(0);
return TypeSP();
}
void Module::FindTypes(
ConstString name, bool exact_match, size_t max_matches,
llvm::DenseSet<lldb_private::SymbolFile *> &searched_symbol_files,
TypeList &types) {
const char *type_name_cstr = name.GetCString();
llvm::StringRef type_scope;
llvm::StringRef type_basename;
TypeClass type_class = eTypeClassAny;
TypeMap typesmap;
if (Type::GetTypeScopeAndBasename(type_name_cstr, type_scope, type_basename,
type_class)) {
// Check if "name" starts with "::" which means the qualified type starts
// from the root namespace and implies and exact match. The typenames we
// get back from clang do not start with "::" so we need to strip this off
// in order to get the qualified names to match
exact_match = type_scope.consume_front("::");
ConstString type_basename_const_str(type_basename);
FindTypes_Impl(type_basename_const_str, CompilerDeclContext(), max_matches,
searched_symbol_files, typesmap);
if (typesmap.GetSize())
typesmap.RemoveMismatchedTypes(std::string(type_scope),
std::string(type_basename), type_class,
exact_match);
} else {
// The type is not in a namespace/class scope, just search for it by
// basename
if (type_class != eTypeClassAny && !type_basename.empty()) {
// The "type_name_cstr" will have been modified if we have a valid type
// class prefix (like "struct", "class", "union", "typedef" etc).
FindTypes_Impl(ConstString(type_basename), CompilerDeclContext(),
UINT_MAX, searched_symbol_files, typesmap);
typesmap.RemoveMismatchedTypes(std::string(type_scope),
std::string(type_basename), type_class,
exact_match);
} else {
FindTypes_Impl(name, CompilerDeclContext(), UINT_MAX,
searched_symbol_files, typesmap);
if (exact_match) {
std::string name_str(name.AsCString(""));
typesmap.RemoveMismatchedTypes(std::string(type_scope), name_str,
type_class, exact_match);
}
}
}
if (typesmap.GetSize()) {
SymbolContext sc;
sc.module_sp = shared_from_this();
sc.SortTypeList(typesmap, types);
}
}
void Module::FindTypes(
llvm::ArrayRef<CompilerContext> pattern, LanguageSet languages,
llvm::DenseSet<lldb_private::SymbolFile *> &searched_symbol_files,
TypeMap &types) {
// If a scoped timer is needed, place it in a SymbolFile::FindTypes override.
// A timer here is too high volume for some cases, for example when calling
// FindTypes on each object file.
if (SymbolFile *symbols = GetSymbolFile())
symbols->FindTypes(pattern, languages, searched_symbol_files, types);
}
SymbolFile *Module::GetSymbolFile(bool can_create, Stream *feedback_strm) {
if (!m_did_load_symfile.load()) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (!m_did_load_symfile.load() && can_create) {
ObjectFile *obj_file = GetObjectFile();
if (obj_file != nullptr) {
LLDB_SCOPED_TIMER();
m_symfile_up.reset(
SymbolVendor::FindPlugin(shared_from_this(), feedback_strm));
m_did_load_symfile = true;
}
}
}
return m_symfile_up ? m_symfile_up->GetSymbolFile() : nullptr;
}
Symtab *Module::GetSymtab() {
if (SymbolFile *symbols = GetSymbolFile())
return symbols->GetSymtab();
return nullptr;
}
void Module::SetFileSpecAndObjectName(const FileSpec &file,
ConstString object_name) {
// Container objects whose paths do not specify a file directly can call this
// function to correct the file and object names.
m_file = file;
m_mod_time = FileSystem::Instance().GetModificationTime(file);
m_object_name = object_name;
}
const ArchSpec &Module::GetArchitecture() const { return m_arch; }
std::string Module::GetSpecificationDescription() const {
std::string spec(GetFileSpec().GetPath());
if (m_object_name) {
spec += '(';
spec += m_object_name.GetCString();
spec += ')';
}
return spec;
}
void Module::GetDescription(llvm::raw_ostream &s,
lldb::DescriptionLevel level) {
if (level >= eDescriptionLevelFull) {
if (m_arch.IsValid())
s << llvm::formatv("({0}) ", m_arch.GetArchitectureName());
}
if (level == eDescriptionLevelBrief) {
const char *filename = m_file.GetFilename().GetCString();
if (filename)
s << filename;
} else {
char path[PATH_MAX];
if (m_file.GetPath(path, sizeof(path)))
s << path;
}
const char *object_name = m_object_name.GetCString();
if (object_name)
s << llvm::formatv("({0})", object_name);
}
bool Module::FileHasChanged() const {
// We have provided the DataBuffer for this module to avoid accessing the
// filesystem. We never want to reload those files.
if (m_data_sp)
return false;
if (!m_file_has_changed)
m_file_has_changed =
(FileSystem::Instance().GetModificationTime(m_file) != m_mod_time);
return m_file_has_changed;
}
void Module::ReportWarningOptimization(
llvm::Optional<lldb::user_id_t> debugger_id) {
ConstString file_name = GetFileSpec().GetFilename();
if (file_name.IsEmpty())
return;
StreamString ss;
ss << file_name.GetStringRef()
<< " was compiled with optimization - stepping may behave "
"oddly; variables may not be available.";
Debugger::ReportWarning(std::string(ss.GetString()), debugger_id,
&m_optimization_warning);
}
void Module::ReportWarningUnsupportedLanguage(
LanguageType language, llvm::Optional<lldb::user_id_t> debugger_id) {
StreamString ss;
ss << "This version of LLDB has no plugin for the language \""
<< Language::GetNameForLanguageType(language)
<< "\". "
"Inspection of frame variables will be limited.";
Debugger::ReportWarning(std::string(ss.GetString()), debugger_id,
&m_language_warning);
}
void Module::ReportErrorIfModifyDetected(const char *format, ...) {
if (!m_first_file_changed_log) {
if (FileHasChanged()) {
m_first_file_changed_log = true;
if (format) {
StreamString strm;
strm.PutCString("the object file ");
GetDescription(strm.AsRawOstream(), lldb::eDescriptionLevelFull);
strm.PutCString(" has been modified\n");
va_list args;
va_start(args, format);
strm.PrintfVarArg(format, args);
va_end(args);
const int format_len = strlen(format);
if (format_len > 0) {
const char last_char = format[format_len - 1];
if (last_char != '\n' && last_char != '\r')
strm.EOL();
}
strm.PutCString("The debug session should be aborted as the original "
"debug information has been overwritten.");
Debugger::ReportError(std::string(strm.GetString()));
}
}
}
}
void Module::ReportError(const char *format, ...) {
if (format && format[0]) {
StreamString strm;
GetDescription(strm.AsRawOstream(), lldb::eDescriptionLevelBrief);
strm.PutChar(' ');
va_list args;
va_start(args, format);
strm.PrintfVarArg(format, args);
va_end(args);
Debugger::ReportError(std::string(strm.GetString()));
}
}
void Module::ReportWarning(const char *format, ...) {
if (format && format[0]) {
StreamString strm;
GetDescription(strm.AsRawOstream(), lldb::eDescriptionLevelFull);
strm.PutChar(' ');
va_list args;
va_start(args, format);
strm.PrintfVarArg(format, args);
va_end(args);
Debugger::ReportWarning(std::string(strm.GetString()));
}
}
void Module::LogMessage(Log *log, const char *format, ...) {
if (log != nullptr) {
StreamString log_message;
GetDescription(log_message.AsRawOstream(), lldb::eDescriptionLevelFull);
log_message.PutCString(": ");
va_list args;
va_start(args, format);
log_message.PrintfVarArg(format, args);
va_end(args);
log->PutCString(log_message.GetData());
}
}
void Module::LogMessageVerboseBacktrace(Log *log, const char *format, ...) {
if (log != nullptr) {
StreamString log_message;
GetDescription(log_message.AsRawOstream(), lldb::eDescriptionLevelFull);
log_message.PutCString(": ");
va_list args;
va_start(args, format);
log_message.PrintfVarArg(format, args);
va_end(args);
if (log->GetVerbose()) {
std::string back_trace;
llvm::raw_string_ostream stream(back_trace);
llvm::sys::PrintStackTrace(stream);
log_message.PutCString(back_trace);
}
log->PutCString(log_message.GetData());
}
}
void Module::Dump(Stream *s) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
// s->Printf("%.*p: ", (int)sizeof(void*) * 2, this);
s->Indent();
s->Printf("Module %s%s%s%s\n", m_file.GetPath().c_str(),
m_object_name ? "(" : "",
m_object_name ? m_object_name.GetCString() : "",
m_object_name ? ")" : "");
s->IndentMore();
ObjectFile *objfile = GetObjectFile();
if (objfile)
objfile->Dump(s);
if (SymbolFile *symbols = GetSymbolFile())
symbols->Dump(*s);
s->IndentLess();
}
ConstString Module::GetObjectName() const { return m_object_name; }
ObjectFile *Module::GetObjectFile() {
if (!m_did_load_objfile.load()) {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (!m_did_load_objfile.load()) {
LLDB_SCOPED_TIMERF("Module::GetObjectFile () module = %s",
GetFileSpec().GetFilename().AsCString(""));
lldb::offset_t data_offset = 0;
lldb::offset_t file_size = 0;
if (m_data_sp)
file_size = m_data_sp->GetByteSize();
else if (m_file)
file_size = FileSystem::Instance().GetByteSize(m_file);
if (file_size > m_object_offset) {
m_did_load_objfile = true;
// FindPlugin will modify its data_sp argument. Do not let it
// modify our m_data_sp member.
auto data_sp = m_data_sp;
m_objfile_sp = ObjectFile::FindPlugin(
shared_from_this(), &m_file, m_object_offset,
file_size - m_object_offset, data_sp, data_offset);
if (m_objfile_sp) {
// Once we get the object file, update our module with the object
// file's architecture since it might differ in vendor/os if some
// parts were unknown. But since the matching arch might already be
// more specific than the generic COFF architecture, only merge in
// those values that overwrite unspecified unknown values.
m_arch.MergeFrom(m_objfile_sp->GetArchitecture());
} else {
ReportError("failed to load objfile for %s",
GetFileSpec().GetPath().c_str());
}
}
}
}
return m_objfile_sp.get();
}
SectionList *Module::GetSectionList() {
// Populate m_sections_up with sections from objfile.
if (!m_sections_up) {
ObjectFile *obj_file = GetObjectFile();
if (obj_file != nullptr)
obj_file->CreateSections(*GetUnifiedSectionList());
}
return m_sections_up.get();
}
void Module::SectionFileAddressesChanged() {
ObjectFile *obj_file = GetObjectFile();
if (obj_file)
obj_file->SectionFileAddressesChanged();
if (SymbolFile *symbols = GetSymbolFile())
symbols->SectionFileAddressesChanged();
}
UnwindTable &Module::GetUnwindTable() {
if (!m_unwind_table)
m_unwind_table.emplace(*this);
return *m_unwind_table;
}
SectionList *Module::GetUnifiedSectionList() {
if (!m_sections_up)
m_sections_up = std::make_unique<SectionList>();
return m_sections_up.get();
}
const Symbol *Module::FindFirstSymbolWithNameAndType(ConstString name,
SymbolType symbol_type) {
LLDB_SCOPED_TIMERF(
"Module::FindFirstSymbolWithNameAndType (name = %s, type = %i)",
name.AsCString(), symbol_type);
if (Symtab *symtab = GetSymtab())
return symtab->FindFirstSymbolWithNameAndType(
name, symbol_type, Symtab::eDebugAny, Symtab::eVisibilityAny);
return nullptr;
}
void Module::SymbolIndicesToSymbolContextList(
Symtab *symtab, std::vector<uint32_t> &symbol_indexes,
SymbolContextList &sc_list) {
// No need to protect this call using m_mutex all other method calls are
// already thread safe.
size_t num_indices = symbol_indexes.size();
if (num_indices > 0) {
SymbolContext sc;
CalculateSymbolContext(&sc);
for (size_t i = 0; i < num_indices; i++) {
sc.symbol = symtab->SymbolAtIndex(symbol_indexes[i]);
if (sc.symbol)
sc_list.Append(sc);
}
}
}
void Module::FindFunctionSymbols(ConstString name, uint32_t name_type_mask,
SymbolContextList &sc_list) {
LLDB_SCOPED_TIMERF("Module::FindSymbolsFunctions (name = %s, mask = 0x%8.8x)",
name.AsCString(), name_type_mask);
if (Symtab *symtab = GetSymtab())
symtab->FindFunctionSymbols(name, name_type_mask, sc_list);
}
void Module::FindSymbolsWithNameAndType(ConstString name,
SymbolType symbol_type,
SymbolContextList &sc_list) {
// No need to protect this call using m_mutex all other method calls are
// already thread safe.
if (Symtab *symtab = GetSymtab()) {
std::vector<uint32_t> symbol_indexes;
symtab->FindAllSymbolsWithNameAndType(name, symbol_type, symbol_indexes);
SymbolIndicesToSymbolContextList(symtab, symbol_indexes, sc_list);
}
}
void Module::FindSymbolsMatchingRegExAndType(const RegularExpression &regex,
SymbolType symbol_type,
SymbolContextList &sc_list) {
// No need to protect this call using m_mutex all other method calls are
// already thread safe.
LLDB_SCOPED_TIMERF(
"Module::FindSymbolsMatchingRegExAndType (regex = %s, type = %i)",
regex.GetText().str().c_str(), symbol_type);
if (Symtab *symtab = GetSymtab()) {
std::vector<uint32_t> symbol_indexes;
symtab->FindAllSymbolsMatchingRexExAndType(
regex, symbol_type, Symtab::eDebugAny, Symtab::eVisibilityAny,
symbol_indexes);
SymbolIndicesToSymbolContextList(symtab, symbol_indexes, sc_list);
}
}
void Module::PreloadSymbols() {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
SymbolFile *sym_file = GetSymbolFile();
if (!sym_file)
return;
// Load the object file symbol table and any symbols from the SymbolFile that
// get appended using SymbolFile::AddSymbols(...).
if (Symtab *symtab = sym_file->GetSymtab())
symtab->PreloadSymbols();
// Now let the symbol file preload its data and the symbol table will be
// available without needing to take the module lock.
sym_file->PreloadSymbols();
}
void Module::SetSymbolFileFileSpec(const FileSpec &file) {
if (!FileSystem::Instance().Exists(file))
return;
if (m_symfile_up) {
// Remove any sections in the unified section list that come from the
// current symbol vendor.
SectionList *section_list = GetSectionList();
SymbolFile *symbol_file = GetSymbolFile();
if (section_list && symbol_file) {
ObjectFile *obj_file = symbol_file->GetObjectFile();
// Make sure we have an object file and that the symbol vendor's objfile
// isn't the same as the module's objfile before we remove any sections
// for it...
if (obj_file) {
// Check to make sure we aren't trying to specify the file we already
// have
if (obj_file->GetFileSpec() == file) {
// We are being told to add the exact same file that we already have
// we don't have to do anything.
return;
}
// Cleare the current symtab as we are going to replace it with a new
// one
obj_file->ClearSymtab();
// Clear the unwind table too, as that may also be affected by the
// symbol file information.
m_unwind_table.reset();
// The symbol file might be a directory bundle ("/tmp/a.out.dSYM")
// instead of a full path to the symbol file within the bundle
// ("/tmp/a.out.dSYM/Contents/Resources/DWARF/a.out"). So we need to
// check this
if (FileSystem::Instance().IsDirectory(file)) {
std::string new_path(file.GetPath());
std::string old_path(obj_file->GetFileSpec().GetPath());
if (llvm::StringRef(old_path).startswith(new_path)) {
// We specified the same bundle as the symbol file that we already
// have
return;
}
}
if (obj_file != m_objfile_sp.get()) {
size_t num_sections = section_list->GetNumSections(0);
for (size_t idx = num_sections; idx > 0; --idx) {
lldb::SectionSP section_sp(
section_list->GetSectionAtIndex(idx - 1));
if (section_sp->GetObjectFile() == obj_file) {
section_list->DeleteSection(idx - 1);
}
}
}
}
}
// Keep all old symbol files around in case there are any lingering type
// references in any SBValue objects that might have been handed out.
m_old_symfiles.push_back(std::move(m_symfile_up));
}
m_symfile_spec = file;
m_symfile_up.reset();
m_did_load_symfile = false;
}
bool Module::IsExecutable() {
if (GetObjectFile() == nullptr)
return false;
else
return GetObjectFile()->IsExecutable();
}
bool Module::IsLoadedInTarget(Target *target) {
ObjectFile *obj_file = GetObjectFile();
if (obj_file) {
SectionList *sections = GetSectionList();
if (sections != nullptr) {
size_t num_sections = sections->GetSize();
for (size_t sect_idx = 0; sect_idx < num_sections; sect_idx++) {
SectionSP section_sp = sections->GetSectionAtIndex(sect_idx);
if (section_sp->GetLoadBaseAddress(target) != LLDB_INVALID_ADDRESS) {
return true;
}
}
}
}
return false;
}
bool Module::LoadScriptingResourceInTarget(Target *target, Status &error,
Stream *feedback_stream) {
if (!target) {
error.SetErrorString("invalid destination Target");
return false;
}
LoadScriptFromSymFile should_load =
target->TargetProperties::GetLoadScriptFromSymbolFile();
if (should_load == eLoadScriptFromSymFileFalse)
return false;
Debugger &debugger = target->GetDebugger();
const ScriptLanguage script_language = debugger.GetScriptLanguage();
if (script_language != eScriptLanguageNone) {
PlatformSP platform_sp(target->GetPlatform());
if (!platform_sp) {
error.SetErrorString("invalid Platform");
return false;
}
FileSpecList file_specs = platform_sp->LocateExecutableScriptingResources(
target, *this, feedback_stream);
const uint32_t num_specs = file_specs.GetSize();
if (num_specs) {
ScriptInterpreter *script_interpreter = debugger.GetScriptInterpreter();
if (script_interpreter) {
for (uint32_t i = 0; i < num_specs; ++i) {
FileSpec scripting_fspec(file_specs.GetFileSpecAtIndex(i));
if (scripting_fspec &&
FileSystem::Instance().Exists(scripting_fspec)) {
if (should_load == eLoadScriptFromSymFileWarn) {
if (feedback_stream)
feedback_stream->Printf(
"warning: '%s' contains a debug script. To run this script "
"in "
"this debug session:\n\n command script import "
"\"%s\"\n\n"
"To run all discovered debug scripts in this session:\n\n"
" settings set target.load-script-from-symbol-file "
"true\n",
GetFileSpec().GetFileNameStrippingExtension().GetCString(),
scripting_fspec.GetPath().c_str());
return false;
}
StreamString scripting_stream;
scripting_fspec.Dump(scripting_stream.AsRawOstream());
LoadScriptOptions options;
bool did_load = script_interpreter->LoadScriptingModule(
scripting_stream.GetData(), options, error);
if (!did_load)
return false;
}
}
} else {
error.SetErrorString("invalid ScriptInterpreter");
return false;
}
}
}
return true;
}
bool Module::SetArchitecture(const ArchSpec &new_arch) {
if (!m_arch.IsValid()) {
m_arch = new_arch;
return true;
}
return m_arch.IsCompatibleMatch(new_arch);
}
bool Module::SetLoadAddress(Target &target, lldb::addr_t value,
bool value_is_offset, bool &changed) {
ObjectFile *object_file = GetObjectFile();
if (object_file != nullptr) {
changed = object_file->SetLoadAddress(target, value, value_is_offset);
return true;
} else {
changed = false;
}
return false;
}
bool Module::MatchesModuleSpec(const ModuleSpec &module_ref) {
const UUID &uuid = module_ref.GetUUID();
if (uuid.IsValid()) {
// If the UUID matches, then nothing more needs to match...
return (uuid == GetUUID());
}
const FileSpec &file_spec = module_ref.GetFileSpec();
if (!FileSpec::Match(file_spec, m_file) &&
!FileSpec::Match(file_spec, m_platform_file))
return false;
const FileSpec &platform_file_spec = module_ref.GetPlatformFileSpec();
if (!FileSpec::Match(platform_file_spec, GetPlatformFileSpec()))
return false;
const ArchSpec &arch = module_ref.GetArchitecture();
if (arch.IsValid()) {
if (!m_arch.IsCompatibleMatch(arch))
return false;
}
ConstString object_name = module_ref.GetObjectName();
if (object_name) {
if (object_name != GetObjectName())
return false;
}
return true;
}
bool Module::FindSourceFile(const FileSpec &orig_spec,
FileSpec &new_spec) const {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (auto remapped = m_source_mappings.FindFile(orig_spec)) {
new_spec = *remapped;
return true;
}
return false;
}
llvm::Optional<std::string>
Module::RemapSourceFile(llvm::StringRef path) const {
std::lock_guard<std::recursive_mutex> guard(m_mutex);
if (auto remapped = m_source_mappings.RemapPath(path))
return remapped->GetPath();
return {};
}
void Module::RegisterXcodeSDK(llvm::StringRef sdk_name,
llvm::StringRef sysroot) {
XcodeSDK sdk(sdk_name.str());
llvm::StringRef sdk_path(HostInfo::GetXcodeSDKPath(sdk));
if (sdk_path.empty())
return;
// If the SDK changed for a previously registered source path, update it.
// This could happend with -fdebug-prefix-map, otherwise it's unlikely.
if (!m_source_mappings.Replace(sysroot, sdk_path, true))
// In the general case, however, append it to the list.
m_source_mappings.Append(sysroot, sdk_path, false);
}
bool Module::MergeArchitecture(const ArchSpec &arch_spec) {
if (!arch_spec.IsValid())
return false;
LLDB_LOGF(GetLog(LLDBLog::Object | LLDBLog::Modules),
"module has arch %s, merging/replacing with arch %s",
m_arch.GetTriple().getTriple().c_str(),
arch_spec.GetTriple().getTriple().c_str());
if (!m_arch.IsCompatibleMatch(arch_spec)) {
// The new architecture is different, we just need to replace it.
return SetArchitecture(arch_spec);
}
// Merge bits from arch_spec into "merged_arch" and set our architecture.
ArchSpec merged_arch(m_arch);
merged_arch.MergeFrom(arch_spec);
// SetArchitecture() is a no-op if m_arch is already valid.
m_arch = ArchSpec();
return SetArchitecture(merged_arch);
}
llvm::VersionTuple Module::GetVersion() {
if (ObjectFile *obj_file = GetObjectFile())
return obj_file->GetVersion();
return llvm::VersionTuple();
}
bool Module::GetIsDynamicLinkEditor() {
ObjectFile *obj_file = GetObjectFile();
if (obj_file)
return obj_file->GetIsDynamicLinkEditor();
return false;
}
uint32_t Module::Hash() {
std::string identifier;
llvm::raw_string_ostream id_strm(identifier);
id_strm << m_arch.GetTriple().str() << '-' << m_file.GetPath();
if (m_object_name)
id_strm << '(' << m_object_name.GetStringRef() << ')';
if (m_object_offset > 0)
id_strm << m_object_offset;
const auto mtime = llvm::sys::toTimeT(m_object_mod_time);
if (mtime > 0)
id_strm << mtime;
return llvm::djbHash(id_strm.str());
}
std::string Module::GetCacheKey() {
std::string key;
llvm::raw_string_ostream strm(key);
strm << m_arch.GetTriple().str() << '-' << m_file.GetFilename();
if (m_object_name)
strm << '(' << m_object_name.GetStringRef() << ')';
strm << '-' << llvm::format_hex(Hash(), 10);
return strm.str();
}
DataFileCache *Module::GetIndexCache() {
if (!ModuleList::GetGlobalModuleListProperties().GetEnableLLDBIndexCache())
return nullptr;
// NOTE: intentional leak so we don't crash if global destructor chain gets
// called as other threads still use the result of this function
static DataFileCache *g_data_file_cache =
new DataFileCache(ModuleList::GetGlobalModuleListProperties()
.GetLLDBIndexCachePath()
.GetPath());
return g_data_file_cache;
}
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