diff options
Diffstat (limited to 'contrib/llvm/tools/lldb/source/Symbol/Symtab.cpp')
| -rw-r--r-- | contrib/llvm/tools/lldb/source/Symbol/Symtab.cpp | 1211 |
1 files changed, 1211 insertions, 0 deletions
diff --git a/contrib/llvm/tools/lldb/source/Symbol/Symtab.cpp b/contrib/llvm/tools/lldb/source/Symbol/Symtab.cpp new file mode 100644 index 0000000..27af698 --- /dev/null +++ b/contrib/llvm/tools/lldb/source/Symbol/Symtab.cpp @@ -0,0 +1,1211 @@ +//===-- Symtab.cpp ----------------------------------------------*- C++ -*-===// +// +// The LLVM Compiler Infrastructure +// +// This file is distributed under the University of Illinois Open Source +// License. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include <map> + +#include "lldb/Core/Module.h" +#include "lldb/Core/RegularExpression.h" +#include "lldb/Core/Section.h" +#include "lldb/Core/Timer.h" +#include "lldb/Symbol/ObjectFile.h" +#include "lldb/Symbol/SymbolContext.h" +#include "lldb/Symbol/Symtab.h" +#include "lldb/Target/CPPLanguageRuntime.h" +#include "lldb/Target/ObjCLanguageRuntime.h" + +using namespace lldb; +using namespace lldb_private; + + + +Symtab::Symtab(ObjectFile *objfile) : + m_objfile (objfile), + m_symbols (), + m_file_addr_to_index (), + m_name_to_index (), + m_mutex (Mutex::eMutexTypeRecursive), + m_file_addr_to_index_computed (false), + m_name_indexes_computed (false) +{ +} + +Symtab::~Symtab() +{ +} + +void +Symtab::Reserve(size_t count) +{ + // Clients should grab the mutex from this symbol table and lock it manually + // when calling this function to avoid performance issues. + m_symbols.reserve (count); +} + +Symbol * +Symtab::Resize(size_t count) +{ + // Clients should grab the mutex from this symbol table and lock it manually + // when calling this function to avoid performance issues. + m_symbols.resize (count); + return &m_symbols[0]; +} + +uint32_t +Symtab::AddSymbol(const Symbol& symbol) +{ + // Clients should grab the mutex from this symbol table and lock it manually + // when calling this function to avoid performance issues. + uint32_t symbol_idx = m_symbols.size(); + m_name_to_index.Clear(); + m_file_addr_to_index.Clear(); + m_symbols.push_back(symbol); + m_file_addr_to_index_computed = false; + m_name_indexes_computed = false; + return symbol_idx; +} + +size_t +Symtab::GetNumSymbols() const +{ + Mutex::Locker locker (m_mutex); + return m_symbols.size(); +} + +void +Symtab::Dump (Stream *s, Target *target, SortOrder sort_order) +{ + Mutex::Locker locker (m_mutex); + +// s->Printf("%.*p: ", (int)sizeof(void*) * 2, this); + s->Indent(); + const FileSpec &file_spec = m_objfile->GetFileSpec(); + const char * object_name = NULL; + if (m_objfile->GetModule()) + object_name = m_objfile->GetModule()->GetObjectName().GetCString(); + + if (file_spec) + s->Printf("Symtab, file = %s%s%s%s, num_symbols = %lu", + file_spec.GetPath().c_str(), + object_name ? "(" : "", + object_name ? object_name : "", + object_name ? ")" : "", + m_symbols.size()); + else + s->Printf("Symtab, num_symbols = %lu", m_symbols.size()); + + if (!m_symbols.empty()) + { + switch (sort_order) + { + case eSortOrderNone: + { + s->PutCString (":\n"); + DumpSymbolHeader (s); + const_iterator begin = m_symbols.begin(); + const_iterator end = m_symbols.end(); + for (const_iterator pos = m_symbols.begin(); pos != end; ++pos) + { + s->Indent(); + pos->Dump(s, target, std::distance(begin, pos)); + } + } + break; + + case eSortOrderByName: + { + // Although we maintain a lookup by exact name map, the table + // isn't sorted by name. So we must make the ordered symbol list + // up ourselves. + s->PutCString (" (sorted by name):\n"); + DumpSymbolHeader (s); + typedef std::multimap<const char*, const Symbol *, CStringCompareFunctionObject> CStringToSymbol; + CStringToSymbol name_map; + for (const_iterator pos = m_symbols.begin(), end = m_symbols.end(); pos != end; ++pos) + { + const char *name = pos->GetMangled().GetName(Mangled::ePreferDemangled).AsCString(); + if (name && name[0]) + name_map.insert (std::make_pair(name, &(*pos))); + } + + for (CStringToSymbol::const_iterator pos = name_map.begin(), end = name_map.end(); pos != end; ++pos) + { + s->Indent(); + pos->second->Dump (s, target, pos->second - &m_symbols[0]); + } + } + break; + + case eSortOrderByAddress: + s->PutCString (" (sorted by address):\n"); + DumpSymbolHeader (s); + if (!m_file_addr_to_index_computed) + InitAddressIndexes(); + const size_t num_entries = m_file_addr_to_index.GetSize(); + for (size_t i=0; i<num_entries; ++i) + { + s->Indent(); + const uint32_t symbol_idx = m_file_addr_to_index.GetEntryRef(i).data; + m_symbols[symbol_idx].Dump(s, target, symbol_idx); + } + break; + } + } +} + +void +Symtab::Dump(Stream *s, Target *target, std::vector<uint32_t>& indexes) const +{ + Mutex::Locker locker (m_mutex); + + const size_t num_symbols = GetNumSymbols(); + //s->Printf("%.*p: ", (int)sizeof(void*) * 2, this); + s->Indent(); + s->Printf("Symtab %lu symbol indexes (%lu symbols total):\n", indexes.size(), m_symbols.size()); + s->IndentMore(); + + if (!indexes.empty()) + { + std::vector<uint32_t>::const_iterator pos; + std::vector<uint32_t>::const_iterator end = indexes.end(); + DumpSymbolHeader (s); + for (pos = indexes.begin(); pos != end; ++pos) + { + size_t idx = *pos; + if (idx < num_symbols) + { + s->Indent(); + m_symbols[idx].Dump(s, target, idx); + } + } + } + s->IndentLess (); +} + +void +Symtab::DumpSymbolHeader (Stream *s) +{ + s->Indent(" Debug symbol\n"); + s->Indent(" |Synthetic symbol\n"); + s->Indent(" ||Externally Visible\n"); + s->Indent(" |||\n"); + s->Indent("Index UserID DSX Type File Address/Value Load Address Size Flags Name\n"); + s->Indent("------- ------ --- ------------ ------------------ ------------------ ------------------ ---------- ----------------------------------\n"); +} + + +static int +CompareSymbolID (const void *key, const void *p) +{ + const user_id_t match_uid = *(user_id_t*) key; + const user_id_t symbol_uid = ((Symbol *)p)->GetID(); + if (match_uid < symbol_uid) + return -1; + if (match_uid > symbol_uid) + return 1; + return 0; +} + +Symbol * +Symtab::FindSymbolByID (lldb::user_id_t symbol_uid) const +{ + Mutex::Locker locker (m_mutex); + + Symbol *symbol = (Symbol*)::bsearch (&symbol_uid, + &m_symbols[0], + m_symbols.size(), + (uint8_t *)&m_symbols[1] - (uint8_t *)&m_symbols[0], + CompareSymbolID); + return symbol; +} + + +Symbol * +Symtab::SymbolAtIndex(size_t idx) +{ + // Clients should grab the mutex from this symbol table and lock it manually + // when calling this function to avoid performance issues. + if (idx < m_symbols.size()) + return &m_symbols[idx]; + return NULL; +} + + +const Symbol * +Symtab::SymbolAtIndex(size_t idx) const +{ + // Clients should grab the mutex from this symbol table and lock it manually + // when calling this function to avoid performance issues. + if (idx < m_symbols.size()) + return &m_symbols[idx]; + return NULL; +} + +//---------------------------------------------------------------------- +// InitNameIndexes +//---------------------------------------------------------------------- +void +Symtab::InitNameIndexes() +{ + // Protected function, no need to lock mutex... + if (!m_name_indexes_computed) + { + m_name_indexes_computed = true; + Timer scoped_timer (__PRETTY_FUNCTION__, "%s", __PRETTY_FUNCTION__); + // Create the name index vector to be able to quickly search by name + const size_t num_symbols = m_symbols.size(); +#if 1 + m_name_to_index.Reserve (num_symbols); +#else + // TODO: benchmark this to see if we save any memory. Otherwise we + // will always keep the memory reserved in the vector unless we pull + // some STL swap magic and then recopy... + uint32_t actual_count = 0; + for (const_iterator pos = m_symbols.begin(), end = m_symbols.end(); + pos != end; + ++pos) + { + const Mangled &mangled = pos->GetMangled(); + if (mangled.GetMangledName()) + ++actual_count; + + if (mangled.GetDemangledName()) + ++actual_count; + } + + m_name_to_index.Reserve (actual_count); +#endif + + NameToIndexMap::Entry entry; + + // The "const char *" in "class_contexts" must come from a ConstString::GetCString() + std::set<const char *> class_contexts; + UniqueCStringMap<uint32_t> mangled_name_to_index; + std::vector<const char *> symbol_contexts(num_symbols, NULL); + + for (entry.value = 0; entry.value<num_symbols; ++entry.value) + { + const Symbol *symbol = &m_symbols[entry.value]; + + // Don't let trampolines get into the lookup by name map + // If we ever need the trampoline symbols to be searchable by name + // we can remove this and then possibly add a new bool to any of the + // Symtab functions that lookup symbols by name to indicate if they + // want trampolines. + if (symbol->IsTrampoline()) + continue; + + const Mangled &mangled = symbol->GetMangled(); + entry.cstring = mangled.GetMangledName().GetCString(); + if (entry.cstring && entry.cstring[0]) + { + m_name_to_index.Append (entry); + + const SymbolType symbol_type = symbol->GetType(); + if (symbol_type == eSymbolTypeCode || symbol_type == eSymbolTypeResolver) + { + if (entry.cstring[0] == '_' && entry.cstring[1] == 'Z' && + (entry.cstring[2] != 'T' && // avoid virtual table, VTT structure, typeinfo structure, and typeinfo name + entry.cstring[2] != 'G' && // avoid guard variables + entry.cstring[2] != 'Z')) // named local entities (if we eventually handle eSymbolTypeData, we will want this back) + { + CPPLanguageRuntime::MethodName cxx_method (mangled.GetDemangledName()); + entry.cstring = ConstString(cxx_method.GetBasename()).GetCString(); + if (entry.cstring && entry.cstring[0]) + { + // ConstString objects permanently store the string in the pool so calling + // GetCString() on the value gets us a const char * that will never go away + const char *const_context = ConstString(cxx_method.GetContext()).GetCString(); + + if (entry.cstring[0] == '~' || !cxx_method.GetQualifiers().empty()) + { + // The first character of the demangled basename is '~' which + // means we have a class destructor. We can use this information + // to help us know what is a class and what isn't. + if (class_contexts.find(const_context) == class_contexts.end()) + class_contexts.insert(const_context); + m_method_to_index.Append (entry); + } + else + { + if (const_context && const_context[0]) + { + if (class_contexts.find(const_context) != class_contexts.end()) + { + // The current decl context is in our "class_contexts" which means + // this is a method on a class + m_method_to_index.Append (entry); + } + else + { + // We don't know if this is a function basename or a method, + // so put it into a temporary collection so once we are done + // we can look in class_contexts to see if each entry is a class + // or just a function and will put any remaining items into + // m_method_to_index or m_basename_to_index as needed + mangled_name_to_index.Append (entry); + symbol_contexts[entry.value] = const_context; + } + } + else + { + // No context for this function so this has to be a basename + m_basename_to_index.Append(entry); + } + } + } + } + } + } + + entry.cstring = mangled.GetDemangledName().GetCString(); + if (entry.cstring && entry.cstring[0]) + m_name_to_index.Append (entry); + + // If the demangled name turns out to be an ObjC name, and + // is a category name, add the version without categories to the index too. + ObjCLanguageRuntime::MethodName objc_method (entry.cstring, true); + if (objc_method.IsValid(true)) + { + entry.cstring = objc_method.GetSelector().GetCString(); + m_selector_to_index.Append (entry); + + ConstString objc_method_no_category (objc_method.GetFullNameWithoutCategory(true)); + if (objc_method_no_category) + { + entry.cstring = objc_method_no_category.GetCString(); + m_name_to_index.Append (entry); + } + } + + } + + size_t count; + if (!mangled_name_to_index.IsEmpty()) + { + count = mangled_name_to_index.GetSize(); + for (size_t i=0; i<count; ++i) + { + if (mangled_name_to_index.GetValueAtIndex(i, entry.value)) + { + entry.cstring = mangled_name_to_index.GetCStringAtIndex(i); + if (symbol_contexts[entry.value] && class_contexts.find(symbol_contexts[entry.value]) != class_contexts.end()) + { + m_method_to_index.Append (entry); + } + else + { + // If we got here, we have something that had a context (was inside a namespace or class) + // yet we don't know if the entry + m_method_to_index.Append (entry); + m_basename_to_index.Append (entry); + } + } + } + } + m_name_to_index.Sort(); + m_name_to_index.SizeToFit(); + m_selector_to_index.Sort(); + m_selector_to_index.SizeToFit(); + m_basename_to_index.Sort(); + m_basename_to_index.SizeToFit(); + m_method_to_index.Sort(); + m_method_to_index.SizeToFit(); + +// static StreamFile a ("/tmp/a.txt"); +// +// count = m_basename_to_index.GetSize(); +// if (count) +// { +// for (size_t i=0; i<count; ++i) +// { +// if (m_basename_to_index.GetValueAtIndex(i, entry.value)) +// a.Printf ("%s BASENAME\n", m_symbols[entry.value].GetMangled().GetName().GetCString()); +// } +// } +// count = m_method_to_index.GetSize(); +// if (count) +// { +// for (size_t i=0; i<count; ++i) +// { +// if (m_method_to_index.GetValueAtIndex(i, entry.value)) +// a.Printf ("%s METHOD\n", m_symbols[entry.value].GetMangled().GetName().GetCString()); +// } +// } + } +} + +void +Symtab::AppendSymbolNamesToMap (const IndexCollection &indexes, + bool add_demangled, + bool add_mangled, + NameToIndexMap &name_to_index_map) const +{ + if (add_demangled || add_mangled) + { + Timer scoped_timer (__PRETTY_FUNCTION__, "%s", __PRETTY_FUNCTION__); + Mutex::Locker locker (m_mutex); + + // Create the name index vector to be able to quickly search by name + NameToIndexMap::Entry entry; + const size_t num_indexes = indexes.size(); + for (size_t i=0; i<num_indexes; ++i) + { + entry.value = indexes[i]; + assert (i < m_symbols.size()); + const Symbol *symbol = &m_symbols[entry.value]; + + const Mangled &mangled = symbol->GetMangled(); + if (add_demangled) + { + entry.cstring = mangled.GetDemangledName().GetCString(); + if (entry.cstring && entry.cstring[0]) + name_to_index_map.Append (entry); + } + + if (add_mangled) + { + entry.cstring = mangled.GetMangledName().GetCString(); + if (entry.cstring && entry.cstring[0]) + name_to_index_map.Append (entry); + } + } + } +} + +uint32_t +Symtab::AppendSymbolIndexesWithType (SymbolType symbol_type, std::vector<uint32_t>& indexes, uint32_t start_idx, uint32_t end_index) const +{ + Mutex::Locker locker (m_mutex); + + uint32_t prev_size = indexes.size(); + + const uint32_t count = std::min<uint32_t> (m_symbols.size(), end_index); + + for (uint32_t i = start_idx; i < count; ++i) + { + if (symbol_type == eSymbolTypeAny || m_symbols[i].GetType() == symbol_type) + indexes.push_back(i); + } + + return indexes.size() - prev_size; +} + +uint32_t +Symtab::AppendSymbolIndexesWithTypeAndFlagsValue (SymbolType symbol_type, uint32_t flags_value, std::vector<uint32_t>& indexes, uint32_t start_idx, uint32_t end_index) const +{ + Mutex::Locker locker (m_mutex); + + uint32_t prev_size = indexes.size(); + + const uint32_t count = std::min<uint32_t> (m_symbols.size(), end_index); + + for (uint32_t i = start_idx; i < count; ++i) + { + if ((symbol_type == eSymbolTypeAny || m_symbols[i].GetType() == symbol_type) && m_symbols[i].GetFlags() == flags_value) + indexes.push_back(i); + } + + return indexes.size() - prev_size; +} + +uint32_t +Symtab::AppendSymbolIndexesWithType (SymbolType symbol_type, Debug symbol_debug_type, Visibility symbol_visibility, std::vector<uint32_t>& indexes, uint32_t start_idx, uint32_t end_index) const +{ + Mutex::Locker locker (m_mutex); + + uint32_t prev_size = indexes.size(); + + const uint32_t count = std::min<uint32_t> (m_symbols.size(), end_index); + + for (uint32_t i = start_idx; i < count; ++i) + { + if (symbol_type == eSymbolTypeAny || m_symbols[i].GetType() == symbol_type) + { + if (CheckSymbolAtIndex(i, symbol_debug_type, symbol_visibility)) + indexes.push_back(i); + } + } + + return indexes.size() - prev_size; +} + + +uint32_t +Symtab::GetIndexForSymbol (const Symbol *symbol) const +{ + const Symbol *first_symbol = &m_symbols[0]; + if (symbol >= first_symbol && symbol < first_symbol + m_symbols.size()) + return symbol - first_symbol; + return UINT32_MAX; +} + +struct SymbolSortInfo +{ + const bool sort_by_load_addr; + const Symbol *symbols; +}; + +namespace { + struct SymbolIndexComparator { + const std::vector<Symbol>& symbols; + std::vector<lldb::addr_t> &addr_cache; + + // Getting from the symbol to the Address to the File Address involves some work. + // Since there are potentially many symbols here, and we're using this for sorting so + // we're going to be computing the address many times, cache that in addr_cache. + // The array passed in has to be the same size as the symbols array passed into the + // member variable symbols, and should be initialized with LLDB_INVALID_ADDRESS. + // NOTE: You have to make addr_cache externally and pass it in because std::stable_sort + // makes copies of the comparator it is initially passed in, and you end up spending + // huge amounts of time copying this array... + + SymbolIndexComparator(const std::vector<Symbol>& s, std::vector<lldb::addr_t> &a) : symbols(s), addr_cache(a) { + assert (symbols.size() == addr_cache.size()); + } + bool operator()(uint32_t index_a, uint32_t index_b) { + addr_t value_a = addr_cache[index_a]; + if (value_a == LLDB_INVALID_ADDRESS) + { + value_a = symbols[index_a].GetAddress().GetFileAddress(); + addr_cache[index_a] = value_a; + } + + addr_t value_b = addr_cache[index_b]; + if (value_b == LLDB_INVALID_ADDRESS) + { + value_b = symbols[index_b].GetAddress().GetFileAddress(); + addr_cache[index_b] = value_b; + } + + + if (value_a == value_b) { + // The if the values are equal, use the original symbol user ID + lldb::user_id_t uid_a = symbols[index_a].GetID(); + lldb::user_id_t uid_b = symbols[index_b].GetID(); + if (uid_a < uid_b) + return true; + if (uid_a > uid_b) + return false; + return false; + } else if (value_a < value_b) + return true; + + return false; + } + }; +} + +void +Symtab::SortSymbolIndexesByValue (std::vector<uint32_t>& indexes, bool remove_duplicates) const +{ + Mutex::Locker locker (m_mutex); + + Timer scoped_timer (__PRETTY_FUNCTION__,__PRETTY_FUNCTION__); + // No need to sort if we have zero or one items... + if (indexes.size() <= 1) + return; + + // Sort the indexes in place using std::stable_sort. + // NOTE: The use of std::stable_sort instead of std::sort here is strictly for performance, + // not correctness. The indexes vector tends to be "close" to sorted, which the + // stable sort handles better. + + std::vector<lldb::addr_t> addr_cache(m_symbols.size(), LLDB_INVALID_ADDRESS); + + SymbolIndexComparator comparator(m_symbols, addr_cache); + std::stable_sort(indexes.begin(), indexes.end(), comparator); + + // Remove any duplicates if requested + if (remove_duplicates) + std::unique(indexes.begin(), indexes.end()); +} + +uint32_t +Symtab::AppendSymbolIndexesWithName (const ConstString& symbol_name, std::vector<uint32_t>& indexes) +{ + Mutex::Locker locker (m_mutex); + + Timer scoped_timer (__PRETTY_FUNCTION__, "%s", __PRETTY_FUNCTION__); + if (symbol_name) + { + const char *symbol_cstr = symbol_name.GetCString(); + if (!m_name_indexes_computed) + InitNameIndexes(); + + return m_name_to_index.GetValues (symbol_cstr, indexes); + } + return 0; +} + +uint32_t +Symtab::AppendSymbolIndexesWithName (const ConstString& symbol_name, Debug symbol_debug_type, Visibility symbol_visibility, std::vector<uint32_t>& indexes) +{ + Mutex::Locker locker (m_mutex); + + Timer scoped_timer (__PRETTY_FUNCTION__, "%s", __PRETTY_FUNCTION__); + if (symbol_name) + { + const size_t old_size = indexes.size(); + if (!m_name_indexes_computed) + InitNameIndexes(); + + const char *symbol_cstr = symbol_name.GetCString(); + + std::vector<uint32_t> all_name_indexes; + const size_t name_match_count = m_name_to_index.GetValues (symbol_cstr, all_name_indexes); + for (size_t i=0; i<name_match_count; ++i) + { + if (CheckSymbolAtIndex(all_name_indexes[i], symbol_debug_type, symbol_visibility)) + indexes.push_back (all_name_indexes[i]); + } + return indexes.size() - old_size; + } + return 0; +} + +uint32_t +Symtab::AppendSymbolIndexesWithNameAndType (const ConstString& symbol_name, SymbolType symbol_type, std::vector<uint32_t>& indexes) +{ + Mutex::Locker locker (m_mutex); + + if (AppendSymbolIndexesWithName(symbol_name, indexes) > 0) + { + std::vector<uint32_t>::iterator pos = indexes.begin(); + while (pos != indexes.end()) + { + if (symbol_type == eSymbolTypeAny || m_symbols[*pos].GetType() == symbol_type) + ++pos; + else + indexes.erase(pos); + } + } + return indexes.size(); +} + +uint32_t +Symtab::AppendSymbolIndexesWithNameAndType (const ConstString& symbol_name, SymbolType symbol_type, Debug symbol_debug_type, Visibility symbol_visibility, std::vector<uint32_t>& indexes) +{ + Mutex::Locker locker (m_mutex); + + if (AppendSymbolIndexesWithName(symbol_name, symbol_debug_type, symbol_visibility, indexes) > 0) + { + std::vector<uint32_t>::iterator pos = indexes.begin(); + while (pos != indexes.end()) + { + if (symbol_type == eSymbolTypeAny || m_symbols[*pos].GetType() == symbol_type) + ++pos; + else + indexes.erase(pos); + } + } + return indexes.size(); +} + + +uint32_t +Symtab::AppendSymbolIndexesMatchingRegExAndType (const RegularExpression ®exp, SymbolType symbol_type, std::vector<uint32_t>& indexes) +{ + Mutex::Locker locker (m_mutex); + + uint32_t prev_size = indexes.size(); + uint32_t sym_end = m_symbols.size(); + + for (uint32_t i = 0; i < sym_end; i++) + { + if (symbol_type == eSymbolTypeAny || m_symbols[i].GetType() == symbol_type) + { + const char *name = m_symbols[i].GetMangled().GetName().AsCString(); + if (name) + { + if (regexp.Execute (name)) + indexes.push_back(i); + } + } + } + return indexes.size() - prev_size; + +} + +uint32_t +Symtab::AppendSymbolIndexesMatchingRegExAndType (const RegularExpression ®exp, SymbolType symbol_type, Debug symbol_debug_type, Visibility symbol_visibility, std::vector<uint32_t>& indexes) +{ + Mutex::Locker locker (m_mutex); + + uint32_t prev_size = indexes.size(); + uint32_t sym_end = m_symbols.size(); + + for (uint32_t i = 0; i < sym_end; i++) + { + if (symbol_type == eSymbolTypeAny || m_symbols[i].GetType() == symbol_type) + { + if (CheckSymbolAtIndex(i, symbol_debug_type, symbol_visibility) == false) + continue; + + const char *name = m_symbols[i].GetMangled().GetName().AsCString(); + if (name) + { + if (regexp.Execute (name)) + indexes.push_back(i); + } + } + } + return indexes.size() - prev_size; + +} + +Symbol * +Symtab::FindSymbolWithType (SymbolType symbol_type, Debug symbol_debug_type, Visibility symbol_visibility, uint32_t& start_idx) +{ + Mutex::Locker locker (m_mutex); + + const size_t count = m_symbols.size(); + for (size_t idx = start_idx; idx < count; ++idx) + { + if (symbol_type == eSymbolTypeAny || m_symbols[idx].GetType() == symbol_type) + { + if (CheckSymbolAtIndex(idx, symbol_debug_type, symbol_visibility)) + { + start_idx = idx; + return &m_symbols[idx]; + } + } + } + return NULL; +} + +size_t +Symtab::FindAllSymbolsWithNameAndType (const ConstString &name, SymbolType symbol_type, std::vector<uint32_t>& symbol_indexes) +{ + Mutex::Locker locker (m_mutex); + + Timer scoped_timer (__PRETTY_FUNCTION__, "%s", __PRETTY_FUNCTION__); + // Initialize all of the lookup by name indexes before converting NAME + // to a uniqued string NAME_STR below. + if (!m_name_indexes_computed) + InitNameIndexes(); + + if (name) + { + // The string table did have a string that matched, but we need + // to check the symbols and match the symbol_type if any was given. + AppendSymbolIndexesWithNameAndType (name, symbol_type, symbol_indexes); + } + return symbol_indexes.size(); +} + +size_t +Symtab::FindAllSymbolsWithNameAndType (const ConstString &name, SymbolType symbol_type, Debug symbol_debug_type, Visibility symbol_visibility, std::vector<uint32_t>& symbol_indexes) +{ + Mutex::Locker locker (m_mutex); + + Timer scoped_timer (__PRETTY_FUNCTION__, "%s", __PRETTY_FUNCTION__); + // Initialize all of the lookup by name indexes before converting NAME + // to a uniqued string NAME_STR below. + if (!m_name_indexes_computed) + InitNameIndexes(); + + if (name) + { + // The string table did have a string that matched, but we need + // to check the symbols and match the symbol_type if any was given. + AppendSymbolIndexesWithNameAndType (name, symbol_type, symbol_debug_type, symbol_visibility, symbol_indexes); + } + return symbol_indexes.size(); +} + +size_t +Symtab::FindAllSymbolsMatchingRexExAndType (const RegularExpression ®ex, SymbolType symbol_type, Debug symbol_debug_type, Visibility symbol_visibility, std::vector<uint32_t>& symbol_indexes) +{ + Mutex::Locker locker (m_mutex); + + AppendSymbolIndexesMatchingRegExAndType(regex, symbol_type, symbol_debug_type, symbol_visibility, symbol_indexes); + return symbol_indexes.size(); +} + +Symbol * +Symtab::FindFirstSymbolWithNameAndType (const ConstString &name, SymbolType symbol_type, Debug symbol_debug_type, Visibility symbol_visibility) +{ + Mutex::Locker locker (m_mutex); + + Timer scoped_timer (__PRETTY_FUNCTION__, "%s", __PRETTY_FUNCTION__); + if (!m_name_indexes_computed) + InitNameIndexes(); + + if (name) + { + std::vector<uint32_t> matching_indexes; + // The string table did have a string that matched, but we need + // to check the symbols and match the symbol_type if any was given. + if (AppendSymbolIndexesWithNameAndType (name, symbol_type, symbol_debug_type, symbol_visibility, matching_indexes)) + { + std::vector<uint32_t>::const_iterator pos, end = matching_indexes.end(); + for (pos = matching_indexes.begin(); pos != end; ++pos) + { + Symbol *symbol = SymbolAtIndex(*pos); + + if (symbol->Compare(name, symbol_type)) + return symbol; + } + } + } + return NULL; +} + +typedef struct +{ + const Symtab *symtab; + const addr_t file_addr; + Symbol *match_symbol; + const uint32_t *match_index_ptr; + addr_t match_offset; +} SymbolSearchInfo; + +static int +SymbolWithFileAddress (SymbolSearchInfo *info, const uint32_t *index_ptr) +{ + const Symbol *curr_symbol = info->symtab->SymbolAtIndex (index_ptr[0]); + if (curr_symbol == NULL) + return -1; + + const addr_t info_file_addr = info->file_addr; + + // lldb::Symbol::GetAddressRangePtr() will only return a non NULL address + // range if the symbol has a section! + if (curr_symbol->ValueIsAddress()) + { + const addr_t curr_file_addr = curr_symbol->GetAddress().GetFileAddress(); + if (info_file_addr < curr_file_addr) + return -1; + if (info_file_addr > curr_file_addr) + return +1; + info->match_symbol = const_cast<Symbol *>(curr_symbol); + info->match_index_ptr = index_ptr; + return 0; + } + + return -1; +} + +static int +SymbolWithClosestFileAddress (SymbolSearchInfo *info, const uint32_t *index_ptr) +{ + const Symbol *symbol = info->symtab->SymbolAtIndex (index_ptr[0]); + if (symbol == NULL) + return -1; + + const addr_t info_file_addr = info->file_addr; + if (symbol->ValueIsAddress()) + { + const addr_t curr_file_addr = symbol->GetAddress().GetFileAddress(); + if (info_file_addr < curr_file_addr) + return -1; + + // Since we are finding the closest symbol that is greater than or equal + // to 'info->file_addr' we set the symbol here. This will get set + // multiple times, but after the search is done it will contain the best + // symbol match + info->match_symbol = const_cast<Symbol *>(symbol); + info->match_index_ptr = index_ptr; + info->match_offset = info_file_addr - curr_file_addr; + + if (info_file_addr > curr_file_addr) + return +1; + return 0; + } + return -1; +} + +static SymbolSearchInfo +FindIndexPtrForSymbolContainingAddress(Symtab* symtab, addr_t file_addr, const uint32_t* indexes, uint32_t num_indexes) +{ + SymbolSearchInfo info = { symtab, file_addr, NULL, NULL, 0 }; + ::bsearch (&info, + indexes, + num_indexes, + sizeof(uint32_t), + (ComparisonFunction)SymbolWithClosestFileAddress); + return info; +} + + +void +Symtab::InitAddressIndexes() +{ + // Protected function, no need to lock mutex... + if (!m_file_addr_to_index_computed && !m_symbols.empty()) + { + m_file_addr_to_index_computed = true; + + FileRangeToIndexMap::Entry entry; + const_iterator begin = m_symbols.begin(); + const_iterator end = m_symbols.end(); + for (const_iterator pos = m_symbols.begin(); pos != end; ++pos) + { + if (pos->ValueIsAddress()) + { + entry.SetRangeBase(pos->GetAddress().GetFileAddress()); + entry.SetByteSize(pos->GetByteSize()); + entry.data = std::distance(begin, pos); + m_file_addr_to_index.Append(entry); + } + } + const size_t num_entries = m_file_addr_to_index.GetSize(); + if (num_entries > 0) + { + m_file_addr_to_index.Sort(); + m_file_addr_to_index.CalculateSizesOfZeroByteSizeRanges(); + + // Now our last symbols might not have had sizes because there + // was no subsequent symbol to calculate the size from. If this is + // the case, then calculate the size by capping it at the end of the + // section in which the symbol resides + for (int i = num_entries - 1; i >= 0; --i) + { + const FileRangeToIndexMap::Entry &entry = m_file_addr_to_index.GetEntryRef(i); + // As we iterate backwards, as soon as we find a symbol with a valid + // byte size, we are done + if (entry.GetByteSize() > 0) + break; + + // Cap the size to the end of the section in which the symbol resides + SectionSP section_sp (m_objfile->GetSectionList()->FindSectionContainingFileAddress (entry.GetRangeBase())); + if (section_sp) + { + const lldb::addr_t end_section_file_addr = section_sp->GetFileAddress() + section_sp->GetByteSize(); + const lldb::addr_t symbol_file_addr = entry.GetRangeBase(); + if (end_section_file_addr > symbol_file_addr) + { + Symbol &symbol = m_symbols[entry.data]; + + symbol.SetByteSize(end_section_file_addr - symbol_file_addr); + symbol.SetSizeIsSynthesized(true); + } + } + } + // Sort again in case the range size changes the ordering + m_file_addr_to_index.Sort(); + } + } +} + +void +Symtab::CalculateSymbolSizes () +{ + Mutex::Locker locker (m_mutex); + + if (!m_symbols.empty()) + { + if (!m_file_addr_to_index_computed) + InitAddressIndexes(); + + const size_t num_entries = m_file_addr_to_index.GetSize(); + + for (size_t i = 0; i < num_entries; ++i) + { + // The entries in the m_file_addr_to_index have calculated the sizes already + // so we will use this size if we need to. + const FileRangeToIndexMap::Entry &entry = m_file_addr_to_index.GetEntryRef(i); + + Symbol &symbol = m_symbols[entry.data]; + + // If the symbol size is already valid, no need to do anything + if (symbol.GetByteSizeIsValid()) + continue; + + const addr_t range_size = entry.GetByteSize(); + if (range_size > 0) + { + symbol.SetByteSize(range_size); + symbol.SetSizeIsSynthesized(true); + } + } + } +} + +Symbol * +Symtab::FindSymbolContainingFileAddress (addr_t file_addr, const uint32_t* indexes, uint32_t num_indexes) +{ + Mutex::Locker locker (m_mutex); + + + SymbolSearchInfo info = { this, file_addr, NULL, NULL, 0 }; + + ::bsearch (&info, + indexes, + num_indexes, + sizeof(uint32_t), + (ComparisonFunction)SymbolWithClosestFileAddress); + + if (info.match_symbol) + { + if (info.match_offset == 0) + { + // We found an exact match! + return info.match_symbol; + } + + const size_t symbol_byte_size = info.match_symbol->GetByteSize(); + + if (symbol_byte_size == 0) + { + // We weren't able to find the size of the symbol so lets just go + // with that match we found in our search... + return info.match_symbol; + } + + // We were able to figure out a symbol size so lets make sure our + // offset puts "file_addr" in the symbol's address range. + if (info.match_offset < symbol_byte_size) + return info.match_symbol; + } + return NULL; +} + +Symbol * +Symtab::FindSymbolContainingFileAddress (addr_t file_addr) +{ + Mutex::Locker locker (m_mutex); + + if (!m_file_addr_to_index_computed) + InitAddressIndexes(); + + const FileRangeToIndexMap::Entry *entry = m_file_addr_to_index.FindEntryThatContains(file_addr); + if (entry) + return SymbolAtIndex(entry->data); + return NULL; +} + +void +Symtab::SymbolIndicesToSymbolContextList (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. + + const bool merge_symbol_into_function = true; + size_t num_indices = symbol_indexes.size(); + if (num_indices > 0) + { + SymbolContext sc; + sc.module_sp = m_objfile->GetModule(); + for (size_t i = 0; i < num_indices; i++) + { + sc.symbol = SymbolAtIndex (symbol_indexes[i]); + if (sc.symbol) + sc_list.AppendIfUnique(sc, merge_symbol_into_function); + } + } +} + + +size_t +Symtab::FindFunctionSymbols (const ConstString &name, + uint32_t name_type_mask, + SymbolContextList& sc_list) +{ + size_t count = 0; + std::vector<uint32_t> symbol_indexes; + + const char *name_cstr = name.GetCString(); + + // eFunctionNameTypeAuto should be pre-resolved by a call to Module::PrepareForFunctionNameLookup() + assert ((name_type_mask & eFunctionNameTypeAuto) == 0); + + if (name_type_mask & (eFunctionNameTypeBase | eFunctionNameTypeFull)) + { + std::vector<uint32_t> temp_symbol_indexes; + FindAllSymbolsWithNameAndType (name, eSymbolTypeAny, temp_symbol_indexes); + + unsigned temp_symbol_indexes_size = temp_symbol_indexes.size(); + if (temp_symbol_indexes_size > 0) + { + Mutex::Locker locker (m_mutex); + for (unsigned i = 0; i < temp_symbol_indexes_size; i++) + { + SymbolContext sym_ctx; + sym_ctx.symbol = SymbolAtIndex (temp_symbol_indexes[i]); + if (sym_ctx.symbol) + { + switch (sym_ctx.symbol->GetType()) + { + case eSymbolTypeCode: + case eSymbolTypeResolver: + symbol_indexes.push_back(temp_symbol_indexes[i]); + break; + default: + break; + } + } + } + } + } + + if (name_type_mask & eFunctionNameTypeBase) + { + // From mangled names we can't tell what is a basename and what + // is a method name, so we just treat them the same + if (!m_name_indexes_computed) + InitNameIndexes(); + + if (!m_basename_to_index.IsEmpty()) + { + const UniqueCStringMap<uint32_t>::Entry *match; + for (match = m_basename_to_index.FindFirstValueForName(name_cstr); + match != NULL; + match = m_basename_to_index.FindNextValueForName(match)) + { + symbol_indexes.push_back(match->value); + } + } + } + + if (name_type_mask & eFunctionNameTypeMethod) + { + if (!m_name_indexes_computed) + InitNameIndexes(); + + if (!m_method_to_index.IsEmpty()) + { + const UniqueCStringMap<uint32_t>::Entry *match; + for (match = m_method_to_index.FindFirstValueForName(name_cstr); + match != NULL; + match = m_method_to_index.FindNextValueForName(match)) + { + symbol_indexes.push_back(match->value); + } + } + } + + if (name_type_mask & eFunctionNameTypeSelector) + { + if (!m_name_indexes_computed) + InitNameIndexes(); + + if (!m_selector_to_index.IsEmpty()) + { + const UniqueCStringMap<uint32_t>::Entry *match; + for (match = m_selector_to_index.FindFirstValueForName(name_cstr); + match != NULL; + match = m_selector_to_index.FindNextValueForName(match)) + { + symbol_indexes.push_back(match->value); + } + } + } + + if (!symbol_indexes.empty()) + { + std::sort(symbol_indexes.begin(), symbol_indexes.end()); + symbol_indexes.erase(std::unique(symbol_indexes.begin(), symbol_indexes.end()), symbol_indexes.end()); + count = symbol_indexes.size(); + SymbolIndicesToSymbolContextList (symbol_indexes, sc_list); + } + + return count; +} + |
