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

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//===-- ModuleList.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/Core/ModuleList.h"
// C Includes
#include <stdint.h>
// C++ Includes
#include <mutex> // std::once
// Other libraries and framework includes
// Project includes
#include "lldb/Core/Log.h"
#include "lldb/Core/Module.h"
#include "lldb/Core/ModuleSpec.h"
#include "lldb/Host/Host.h"
#include "lldb/Host/Symbols.h"
#include "lldb/Symbol/ClangNamespaceDecl.h"
#include "lldb/Symbol/ObjectFile.h"
#include "lldb/Symbol/VariableList.h"
using namespace lldb;
using namespace lldb_private;
//----------------------------------------------------------------------
// ModuleList constructor
//----------------------------------------------------------------------
ModuleList::ModuleList() :
m_modules(),
m_modules_mutex (Mutex::eMutexTypeRecursive),
m_notifier(NULL)
{
}
//----------------------------------------------------------------------
// Copy constructor
//----------------------------------------------------------------------
ModuleList::ModuleList(const ModuleList& rhs) :
m_modules(),
m_modules_mutex (Mutex::eMutexTypeRecursive),
m_notifier(NULL)
{
Mutex::Locker lhs_locker(m_modules_mutex);
Mutex::Locker rhs_locker(rhs.m_modules_mutex);
m_modules = rhs.m_modules;
}
ModuleList::ModuleList (ModuleList::Notifier* notifier) :
m_modules(),
m_modules_mutex (Mutex::eMutexTypeRecursive),
m_notifier(notifier)
{
}
//----------------------------------------------------------------------
// Assignment operator
//----------------------------------------------------------------------
const ModuleList&
ModuleList::operator= (const ModuleList& rhs)
{
if (this != &rhs)
{
// That's probably me nit-picking, but in theoretical situation:
//
// * that two threads A B and
// * two ModuleList's x y do opposite assignemnts ie.:
//
// in thread A: | in thread B:
// x = y; | y = x;
//
// This establishes correct(same) lock taking order and thus
// avoids priority inversion.
if (uintptr_t(this) > uintptr_t(&rhs))
{
Mutex::Locker lhs_locker(m_modules_mutex);
Mutex::Locker rhs_locker(rhs.m_modules_mutex);
m_modules = rhs.m_modules;
}
else
{
Mutex::Locker rhs_locker(rhs.m_modules_mutex);
Mutex::Locker lhs_locker(m_modules_mutex);
m_modules = rhs.m_modules;
}
}
return *this;
}
//----------------------------------------------------------------------
// Destructor
//----------------------------------------------------------------------
ModuleList::~ModuleList()
{
}
void
ModuleList::AppendImpl (const ModuleSP &module_sp, bool use_notifier)
{
if (module_sp)
{
Mutex::Locker locker(m_modules_mutex);
m_modules.push_back(module_sp);
if (use_notifier && m_notifier)
m_notifier->ModuleAdded(*this, module_sp);
}
}
void
ModuleList::Append (const ModuleSP &module_sp)
{
AppendImpl (module_sp);
}
void
ModuleList::ReplaceEquivalent (const ModuleSP &module_sp)
{
if (module_sp)
{
Mutex::Locker locker(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 module_sp (m_modules[idx]);
if (module_sp->MatchesModuleSpec (equivalent_module_spec))
RemoveImpl(m_modules.begin() + idx);
else
++idx;
}
// Now add the new module to the list
Append(module_sp);
}
}
bool
ModuleList::AppendIfNeeded (const ModuleSP &module_sp)
{
if (module_sp)
{
Mutex::Locker locker(m_modules_mutex);
collection::iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos)
{
if (pos->get() == module_sp.get())
return false; // Already in the list
}
// Only push module_sp on the list if it wasn't already in there.
Append(module_sp);
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)
{
Mutex::Locker locker(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->ModuleRemoved(*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->ModuleRemoved(*this, module_sp);
return retval;
}
bool
ModuleList::Remove (const ModuleSP &module_sp)
{
return RemoveImpl (module_sp);
}
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->ModuleUpdated(*this, old_module_sp,new_module_sp);
return true;
}
bool
ModuleList::RemoveIfOrphaned (const Module *module_ptr)
{
if (module_ptr)
{
Mutex::Locker locker(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)
{
Mutex::Locker locker;
if (mandatory)
{
locker.Lock (m_modules_mutex);
}
else
{
// Not mandatory, remove orphans if we can get the mutex
if (!locker.TryLock(m_modules_mutex))
return 0;
}
collection::iterator pos = m_modules.begin();
size_t remove_count = 0;
while (pos != m_modules.end())
{
if (pos->unique())
{
pos = RemoveImpl(pos);
++remove_count;
}
else
{
++pos;
}
}
return remove_count;
}
size_t
ModuleList::Remove (ModuleList &module_list)
{
Mutex::Locker locker(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))
++num_removed;
}
return num_removed;
}
void
ModuleList::Clear()
{
ClearImpl();
}
void
ModuleList::Destroy()
{
ClearImpl();
}
void
ModuleList::ClearImpl (bool use_notifier)
{
Mutex::Locker locker(m_modules_mutex);
if (use_notifier && m_notifier)
m_notifier->WillClearList(*this);
m_modules.clear();
}
Module*
ModuleList::GetModulePointerAtIndex (size_t idx) const
{
Mutex::Locker locker(m_modules_mutex);
return GetModulePointerAtIndexUnlocked(idx);
}
Module*
ModuleList::GetModulePointerAtIndexUnlocked (size_t idx) const
{
if (idx < m_modules.size())
return m_modules[idx].get();
return NULL;
}
ModuleSP
ModuleList::GetModuleAtIndex(size_t idx) const
{
Mutex::Locker locker(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;
}
size_t
ModuleList::FindFunctions (const ConstString &name,
uint32_t name_type_mask,
bool include_symbols,
bool include_inlines,
bool append,
SymbolContextList &sc_list) const
{
if (!append)
sc_list.Clear();
const size_t old_size = sc_list.GetSize();
if (name_type_mask & eFunctionNameTypeAuto)
{
ConstString lookup_name;
uint32_t lookup_name_type_mask = 0;
bool match_name_after_lookup = false;
Module::PrepareForFunctionNameLookup (name, name_type_mask,
lookup_name,
lookup_name_type_mask,
match_name_after_lookup);
Mutex::Locker locker(m_modules_mutex);
collection::const_iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos)
{
(*pos)->FindFunctions (lookup_name,
NULL,
lookup_name_type_mask,
include_symbols,
include_inlines,
true,
sc_list);
}
if (match_name_after_lookup)
{
SymbolContext sc;
size_t i = old_size;
while (i<sc_list.GetSize())
{
if (sc_list.GetContextAtIndex(i, sc))
{
const char *func_name = sc.GetFunctionName().GetCString();
if (func_name && strstr (func_name, name.GetCString()) == NULL)
{
// Remove the current context
sc_list.RemoveContextAtIndex(i);
// Don't increment i and continue in the loop
continue;
}
}
++i;
}
}
}
else
{
Mutex::Locker locker(m_modules_mutex);
collection::const_iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos)
{
(*pos)->FindFunctions (name, NULL, name_type_mask, include_symbols, include_inlines, true, sc_list);
}
}
return sc_list.GetSize() - old_size;
}
size_t
ModuleList::FindFunctionSymbols (const ConstString &name,
uint32_t name_type_mask,
SymbolContextList& sc_list)
{
const size_t old_size = sc_list.GetSize();
if (name_type_mask & eFunctionNameTypeAuto)
{
ConstString lookup_name;
uint32_t lookup_name_type_mask = 0;
bool match_name_after_lookup = false;
Module::PrepareForFunctionNameLookup (name, name_type_mask,
lookup_name,
lookup_name_type_mask,
match_name_after_lookup);
Mutex::Locker locker(m_modules_mutex);
collection::const_iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos)
{
(*pos)->FindFunctionSymbols (lookup_name,
lookup_name_type_mask,
sc_list);
}
if (match_name_after_lookup)
{
SymbolContext sc;
size_t i = old_size;
while (i<sc_list.GetSize())
{
if (sc_list.GetContextAtIndex(i, sc))
{
const char *func_name = sc.GetFunctionName().GetCString();
if (func_name && strstr (func_name, name.GetCString()) == NULL)
{
// Remove the current context
sc_list.RemoveContextAtIndex(i);
// Don't increment i and continue in the loop
continue;
}
}
++i;
}
}
}
else
{
Mutex::Locker locker(m_modules_mutex);
collection::const_iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos)
{
(*pos)->FindFunctionSymbols (name, name_type_mask, sc_list);
}
}
return sc_list.GetSize() - old_size;
}
size_t
ModuleList::FindFunctions(const RegularExpression &name,
bool include_symbols,
bool include_inlines,
bool append,
SymbolContextList& sc_list)
{
const size_t old_size = sc_list.GetSize();
Mutex::Locker locker(m_modules_mutex);
collection::const_iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos)
{
(*pos)->FindFunctions (name, include_symbols, include_inlines, append, sc_list);
}
return sc_list.GetSize() - old_size;
}
size_t
ModuleList::FindCompileUnits (const FileSpec &path,
bool append,
SymbolContextList &sc_list) const
{
if (!append)
sc_list.Clear();
Mutex::Locker locker(m_modules_mutex);
collection::const_iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos)
{
(*pos)->FindCompileUnits (path, true, sc_list);
}
return sc_list.GetSize();
}
size_t
ModuleList::FindGlobalVariables (const ConstString &name,
bool append,
size_t max_matches,
VariableList& variable_list) const
{
size_t initial_size = variable_list.GetSize();
Mutex::Locker locker(m_modules_mutex);
collection::const_iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos)
{
(*pos)->FindGlobalVariables (name, NULL, append, max_matches, variable_list);
}
return variable_list.GetSize() - initial_size;
}
size_t
ModuleList::FindGlobalVariables (const RegularExpression& regex,
bool append,
size_t max_matches,
VariableList& variable_list) const
{
size_t initial_size = variable_list.GetSize();
Mutex::Locker locker(m_modules_mutex);
collection::const_iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos)
{
(*pos)->FindGlobalVariables (regex, append, max_matches, variable_list);
}
return variable_list.GetSize() - initial_size;
}
size_t
ModuleList::FindSymbolsWithNameAndType (const ConstString &name,
SymbolType symbol_type,
SymbolContextList &sc_list,
bool append) const
{
Mutex::Locker locker(m_modules_mutex);
if (!append)
sc_list.Clear();
size_t initial_size = sc_list.GetSize();
collection::const_iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos)
(*pos)->FindSymbolsWithNameAndType (name, symbol_type, sc_list);
return sc_list.GetSize() - initial_size;
}
size_t
ModuleList::FindSymbolsMatchingRegExAndType (const RegularExpression &regex,
lldb::SymbolType symbol_type,
SymbolContextList &sc_list,
bool append) const
{
Mutex::Locker locker(m_modules_mutex);
if (!append)
sc_list.Clear();
size_t initial_size = sc_list.GetSize();
collection::const_iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos)
(*pos)->FindSymbolsMatchingRegExAndType (regex, symbol_type, sc_list);
return sc_list.GetSize() - initial_size;
}
size_t
ModuleList::FindModules (const ModuleSpec &module_spec, ModuleList& matching_module_list) const
{
size_t existing_matches = matching_module_list.GetSize();
Mutex::Locker locker(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))
matching_module_list.Append(module_sp);
}
return matching_module_list.GetSize() - existing_matches;
}
ModuleSP
ModuleList::FindModule (const Module *module_ptr) const
{
ModuleSP module_sp;
// Scope for "locker"
{
Mutex::Locker locker(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())
{
Mutex::Locker locker(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;
}
size_t
ModuleList::FindTypes (const SymbolContext& sc, const ConstString &name, bool name_is_fully_qualified, size_t max_matches, TypeList& types) const
{
Mutex::Locker locker(m_modules_mutex);
size_t total_matches = 0;
collection::const_iterator pos, end = m_modules.end();
if (sc.module_sp)
{
// The symbol context "sc" contains a module so we want to search that
// one first if it is in our list...
for (pos = m_modules.begin(); pos != end; ++pos)
{
if (sc.module_sp.get() == (*pos).get())
{
total_matches += (*pos)->FindTypes (sc, name, name_is_fully_qualified, max_matches, types);
if (total_matches >= max_matches)
break;
}
}
}
if (total_matches < max_matches)
{
SymbolContext world_sc;
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 comparisong will always be true (valid_module_ptr != NULL).
if (sc.module_sp.get() != (*pos).get())
total_matches += (*pos)->FindTypes (world_sc, name, name_is_fully_qualified, max_matches, types);
if (total_matches >= max_matches)
break;
}
}
return total_matches;
}
bool
ModuleList::FindSourceFile (const FileSpec &orig_spec, FileSpec &new_spec) const
{
Mutex::Locker locker(m_modules_mutex);
collection::const_iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos)
{
if ((*pos)->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)
{
Mutex::Locker locker(m_modules_mutex);
collection::const_iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos)
{
(*pos)->FindAddressesForLine(target_sp, file, line, function, output_local, output_extern);
}
}
ModuleSP
ModuleList::FindFirstModule (const ModuleSpec &module_spec) const
{
ModuleSP module_sp;
Mutex::Locker locker(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;
{
Mutex::Locker locker(m_modules_mutex);
size = m_modules.size();
}
return size;
}
void
ModuleList::Dump(Stream *s) const
{
// s.Printf("%.*p: ", (int)sizeof(void*) * 2, this);
// s.Indent();
// s << "ModuleList\n";
Mutex::Locker locker(m_modules_mutex);
collection::const_iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos)
{
(*pos)->Dump(s);
}
}
void
ModuleList::LogUUIDAndPaths (Log *log, const char *prefix_cstr)
{
if (log)
{
Mutex::Locker locker(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();
log->Printf ("%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
{
Mutex::Locker locker(m_modules_mutex);
collection::const_iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos)
{
if ((*pos)->ResolveFileAddress (vm_addr, so_addr))
return true;
}
return false;
}
uint32_t
ModuleList::ResolveSymbolContextForAddress (const Address& so_addr, uint32_t 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
{
Mutex::Locker locker(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,
uint32_t resolve_scope,
SymbolContextList& sc_list
) const
{
FileSpec file_spec(file_path, false);
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, uint32_t resolve_scope, SymbolContextList& sc_list) const
{
Mutex::Locker locker(m_modules_mutex);
collection::const_iterator pos, end = m_modules.end();
for (pos = m_modules.begin(); pos != end; ++pos)
{
(*pos)->ResolveSymbolContextsForFileSpec (file_spec, line, check_inlines, resolve_scope, sc_list);
}
return sc_list.GetSize();
}
size_t
ModuleList::GetIndexForModule (const Module *module) const
{
if (module)
{
Mutex::Locker locker(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;
}
static ModuleList &
GetSharedModuleList ()
{
static ModuleList *g_shared_module_list = NULL;
static std::once_flag g_once_flag;
std::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 == NULL)
g_shared_module_list = new ModuleList(); // <--- Intentional leak!!!
});
return *g_shared_module_list;
}
bool
ModuleList::ModuleIsInCache (const Module *module_ptr)
{
if (module_ptr)
{
ModuleList &shared_module_list = GetSharedModuleList ();
return shared_module_list.FindModule (module_ptr).get() != NULL;
}
return false;
}
size_t
ModuleList::FindSharedModules (const ModuleSpec &module_spec, ModuleList &matching_module_list)
{
return GetSharedModuleList ().FindModules (module_spec, matching_module_list);
}
size_t
ModuleList::RemoveOrphanSharedModules (bool mandatory)
{
return GetSharedModuleList ().RemoveOrphans(mandatory);
}
Error
ModuleList::GetSharedModule
(
const ModuleSpec &module_spec,
ModuleSP &module_sp,
const FileSpecList *module_search_paths_ptr,
ModuleSP *old_module_sp_ptr,
bool *did_create_ptr,
bool always_create
)
{
ModuleList &shared_module_list = GetSharedModuleList ();
Mutex::Locker locker(shared_module_list.m_modules_mutex);
char path[PATH_MAX];
Error error;
module_sp.reset();
if (did_create_ptr)
*did_create_ptr = false;
if (old_module_sp_ptr)
old_module_sp_ptr->reset();
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 == false)
{
ModuleList matching_module_list;
const size_t num_matching_modules = shared_module_list.FindModules (module_spec, matching_module_list);
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_module_sp_ptr && !old_module_sp_ptr->get())
*old_module_sp_ptr = module_sp;
Log *log(lldb_private::GetLogIfAnyCategoriesSet (LIBLLDB_LOG_MODULES));
if (log)
log->Printf("module changed: %p, removing from global module list",
static_cast<void*>(module_sp.get()));
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.reset (new 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 (did_create_ptr)
*did_create_ptr = true;
shared_module_list.ReplaceEquivalent(module_sp);
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);
if (!search_path_spec.ResolvePath())
continue;
if (!search_path_spec.Exists() || !search_path_spec.IsDirectory())
continue;
search_path_spec.AppendPathComponent(module_spec.GetFileSpec().GetFilename().AsCString());
if (!search_path_spec.Exists())
continue;
auto resolved_module_spec(module_spec);
resolved_module_spec.GetFileSpec() = search_path_spec;
module_sp.reset (new 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 (did_create_ptr)
*did_create_ptr = true;
shared_module_list.ReplaceEquivalent(module_sp);
return Error();
}
}
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.
FileSpec file_spec = Symbols::LocateExecutableObjectFile (module_spec);
// Don't look for the file if it appears to be the same one we already
// checked for above...
if (file_spec != module_file_spec)
{
if (!file_spec.Exists())
{
file_spec.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 (file_spec.Exists())
{
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() = file_spec;
platform_module_spec.GetPlatformFileSpec() = file_spec;
ModuleList matching_module_list;
if (shared_module_list.FindModules (platform_module_spec, matching_module_list) > 0)
{
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() == NULL)
{
TimeValue file_spec_mod_time(file_spec.GetModificationTime());
if (file_spec_mod_time.IsValid())
{
if (file_spec_mod_time != module_sp->GetModificationTime())
{
if (old_module_sp_ptr)
*old_module_sp_ptr = module_sp;
shared_module_list.Remove (module_sp);
module_sp.reset();
}
}
}
}
if (module_sp.get() == NULL)
{
module_sp.reset (new 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 (did_create_ptr)
*did_create_ptr = true;
shared_module_list.ReplaceEquivalent(module_sp);
}
else
{
file_spec.GetPath(path, sizeof(path));
if (file_spec)
{
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.SetErrorStringWithFormat("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<Error>& errors,
Stream *feedback_stream,
bool continue_on_error)
{
if (!target)
return false;
Mutex::Locker locker(m_modules_mutex);
for (auto module : m_modules)
{
Error 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.size() == 0;
}
void
ModuleList::ForEach (std::function <bool (const ModuleSP &module_sp)> const &callback) const
{
Mutex::Locker locker(m_modules_mutex);
for (const auto &module : m_modules)
{
// If the callback returns false, then stop iterating and break out
if (!callback (module))
break;
}
}
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