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llvm-project/lldb/source/Symbol/CompileUnit.cpp

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//===-- CompileUnit.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/Symbol/CompileUnit.h"
#include "lldb/Core/Module.h"
#include "lldb/Symbol/LineTable.h"
#include "lldb/Symbol/SymbolFile.h"
#include "lldb/Symbol/VariableList.h"
#include "lldb/Target/Language.h"
#include "lldb/Utility/Timer.h"
using namespace lldb;
using namespace lldb_private;
CompileUnit::CompileUnit(const lldb::ModuleSP &module_sp, void *user_data,
const char *pathname, const lldb::user_id_t cu_sym_id,
lldb::LanguageType language,
lldb_private::LazyBool is_optimized)
: CompileUnit(module_sp, user_data, FileSpec(pathname), cu_sym_id, language,
is_optimized) {}
CompileUnit::CompileUnit(const lldb::ModuleSP &module_sp, void *user_data,
const FileSpec &fspec, const lldb::user_id_t cu_sym_id,
lldb::LanguageType language,
lldb_private::LazyBool is_optimized)
: ModuleChild(module_sp), UserID(cu_sym_id), m_user_data(user_data),
m_language(language), m_flags(0), m_file_spec(fspec),
m_is_optimized(is_optimized) {
if (language != eLanguageTypeUnknown)
m_flags.Set(flagsParsedLanguage);
assert(module_sp);
}
void CompileUnit::CalculateSymbolContext(SymbolContext *sc) {
sc->comp_unit = this;
GetModule()->CalculateSymbolContext(sc);
}
ModuleSP CompileUnit::CalculateSymbolContextModule() { return GetModule(); }
CompileUnit *CompileUnit::CalculateSymbolContextCompileUnit() { return this; }
void CompileUnit::DumpSymbolContext(Stream *s) {
GetModule()->DumpSymbolContext(s);
s->Printf(", CompileUnit{0x%8.8" PRIx64 "}", GetID());
}
void CompileUnit::GetDescription(Stream *s,
lldb::DescriptionLevel level) const {
const char *language = Language::GetNameForLanguageType(m_language);
*s << "id = " << (const UserID &)*this << ", file = \""
<< this->GetPrimaryFile() << "\", language = \"" << language << '"';
}
void CompileUnit::ForeachFunction(
llvm::function_ref<bool(const FunctionSP &)> lambda) const {
std::vector<lldb::FunctionSP> sorted_functions;
sorted_functions.reserve(m_functions_by_uid.size());
for (auto &p : m_functions_by_uid)
sorted_functions.push_back(p.second);
llvm::sort(sorted_functions.begin(), sorted_functions.end(),
[](const lldb::FunctionSP &a, const lldb::FunctionSP &b) {
return a->GetID() < b->GetID();
});
for (auto &f : sorted_functions)
if (lambda(f))
return;
}
lldb::FunctionSP CompileUnit::FindFunction(
llvm::function_ref<bool(const FunctionSP &)> matching_lambda) {
static Timer::Category func_cat(LLVM_PRETTY_FUNCTION);
Timer scoped_timer(func_cat, "CompileUnit::FindFunction");
lldb::ModuleSP module = CalculateSymbolContextModule();
if (!module)
return {};
SymbolFile *symbol_file = module->GetSymbolFile();
if (!symbol_file)
return {};
// m_functions_by_uid is filled in lazily but we need all the entries.
symbol_file->ParseFunctions(*this);
for (auto &p : m_functions_by_uid) {
if (matching_lambda(p.second))
return p.second;
}
return {};
}
// Dump the current contents of this object. No functions that cause on demand
// parsing of functions, globals, statics are called, so this is a good
// function to call to get an idea of the current contents of the CompileUnit
// object.
void CompileUnit::Dump(Stream *s, bool show_context) const {
const char *language = Language::GetNameForLanguageType(m_language);
s->Printf("%p: ", static_cast<const void *>(this));
s->Indent();
*s << "CompileUnit" << static_cast<const UserID &>(*this) << ", language = \""
<< language << "\", file = '" << GetPrimaryFile() << "'\n";
// m_types.Dump(s);
if (m_variables.get()) {
s->IndentMore();
m_variables->Dump(s, show_context);
s->IndentLess();
}
if (!m_functions_by_uid.empty()) {
s->IndentMore();
ForeachFunction([&s, show_context](const FunctionSP &f) {
f->Dump(s, show_context);
return false;
});
s->IndentLess();
s->EOL();
}
}
// Add a function to this compile unit
void CompileUnit::AddFunction(FunctionSP &funcSP) {
m_functions_by_uid[funcSP->GetID()] = funcSP;
}
FunctionSP CompileUnit::FindFunctionByUID(lldb::user_id_t func_uid) {
auto it = m_functions_by_uid.find(func_uid);
if (it == m_functions_by_uid.end())
return FunctionSP();
return it->second;
}
lldb::LanguageType CompileUnit::GetLanguage() {
if (m_language == eLanguageTypeUnknown) {
if (m_flags.IsClear(flagsParsedLanguage)) {
m_flags.Set(flagsParsedLanguage);
if (SymbolFile *symfile = GetModule()->GetSymbolFile())
m_language = symfile->ParseLanguage(*this);
}
}
return m_language;
}
LineTable *CompileUnit::GetLineTable() {
if (m_line_table_up == nullptr) {
if (m_flags.IsClear(flagsParsedLineTable)) {
m_flags.Set(flagsParsedLineTable);
if (SymbolFile *symfile = GetModule()->GetSymbolFile())
symfile->ParseLineTable(*this);
}
}
return m_line_table_up.get();
}
void CompileUnit::SetLineTable(LineTable *line_table) {
if (line_table == nullptr)
m_flags.Clear(flagsParsedLineTable);
else
m_flags.Set(flagsParsedLineTable);
m_line_table_up.reset(line_table);
}
void CompileUnit::SetSupportFiles(const FileSpecList &support_files) {
m_support_files = support_files;
}
DebugMacros *CompileUnit::GetDebugMacros() {
if (m_debug_macros_sp.get() == nullptr) {
if (m_flags.IsClear(flagsParsedDebugMacros)) {
m_flags.Set(flagsParsedDebugMacros);
if (SymbolFile *symfile = GetModule()->GetSymbolFile())
symfile->ParseDebugMacros(*this);
}
}
return m_debug_macros_sp.get();
}
void CompileUnit::SetDebugMacros(const DebugMacrosSP &debug_macros_sp) {
if (debug_macros_sp.get() == nullptr)
m_flags.Clear(flagsParsedDebugMacros);
else
m_flags.Set(flagsParsedDebugMacros);
m_debug_macros_sp = debug_macros_sp;
}
VariableListSP CompileUnit::GetVariableList(bool can_create) {
if (m_variables.get() == nullptr && can_create) {
SymbolContext sc;
CalculateSymbolContext(&sc);
assert(sc.module_sp);
sc.module_sp->GetSymbolFile()->ParseVariablesForContext(sc);
}
return m_variables;
}
std::vector<uint32_t> FindFileIndexes(const FileSpecList &files, const FileSpec &file) {
std::vector<uint32_t> result;
uint32_t idx = -1;
while ((idx = files.FindFileIndex(idx + 1, file, /*full=*/true)) !=
UINT32_MAX)
result.push_back(idx);
return result;
}
uint32_t CompileUnit::FindLineEntry(uint32_t start_idx, uint32_t line,
const FileSpec *file_spec_ptr, bool exact,
LineEntry *line_entry_ptr) {
if (!file_spec_ptr)
file_spec_ptr = &GetPrimaryFile();
std::vector<uint32_t> file_indexes = FindFileIndexes(GetSupportFiles(), *file_spec_ptr);
if (file_indexes.empty())
return UINT32_MAX;
LineTable *line_table = GetLineTable();
if (line_table)
return line_table->FindLineEntryIndexByFileIndex(
start_idx, file_indexes, line, exact, line_entry_ptr);
return UINT32_MAX;
}
void CompileUnit::ResolveSymbolContext(const FileSpec &file_spec,
uint32_t line, bool check_inlines,
bool exact,
SymbolContextItem resolve_scope,
SymbolContextList &sc_list) {
// First find all of the file indexes that match our "file_spec". If
// "file_spec" has an empty directory, then only compare the basenames when
// finding file indexes
std::vector<uint32_t> file_indexes;
bool file_spec_matches_cu_file_spec =
FileSpec::Match(file_spec, this->GetPrimaryFile());
// If we are not looking for inlined functions and our file spec doesn't
// match then we are done...
if (!file_spec_matches_cu_file_spec && !check_inlines)
return;
uint32_t file_idx =
GetSupportFiles().FindFileIndex(0, file_spec, true);
while (file_idx != UINT32_MAX) {
file_indexes.push_back(file_idx);
file_idx = GetSupportFiles().FindFileIndex(file_idx + 1, file_spec, true);
}
const size_t num_file_indexes = file_indexes.size();
if (num_file_indexes == 0)
return;
SymbolContext sc(GetModule());
sc.comp_unit = this;
if (line == 0) {
if (file_spec_matches_cu_file_spec && !check_inlines) {
// only append the context if we aren't looking for inline call sites by
// file and line and if the file spec matches that of the compile unit
sc_list.Append(sc);
}
return;
}
LineTable *line_table = sc.comp_unit->GetLineTable();
if (line_table == nullptr)
return;
uint32_t line_idx;
LineEntry line_entry;
if (num_file_indexes == 1) {
// We only have a single support file that matches, so use the line
// table function that searches for a line entries that match a single
// support file index
line_idx = line_table->FindLineEntryIndexByFileIndex(
0, file_indexes.front(), line, exact, &line_entry);
} else {
// We found multiple support files that match "file_spec" so use the
// line table function that searches for a line entries that match a
// multiple support file indexes.
line_idx = line_table->FindLineEntryIndexByFileIndex(0, file_indexes, line,
exact, &line_entry);
}
// If "exact == true", then "found_line" will be the same as "line". If
// "exact == false", the "found_line" will be the closest line entry
// with a line number greater than "line" and we will use this for our
// subsequent line exact matches below.
uint32_t found_line = line_entry.line;
while (line_idx != UINT32_MAX) {
// If they only asked for the line entry, then we're done, we can
// just copy that over. But if they wanted more than just the line
// number, fill it in.
if (resolve_scope == eSymbolContextLineEntry) {
sc.line_entry = line_entry;
} else {
line_entry.range.GetBaseAddress().CalculateSymbolContext(&sc,
resolve_scope);
}
sc_list.Append(sc);
if (num_file_indexes == 1)
line_idx = line_table->FindLineEntryIndexByFileIndex(
line_idx + 1, file_indexes.front(), found_line, true, &line_entry);
else
line_idx = line_table->FindLineEntryIndexByFileIndex(
line_idx + 1, file_indexes, found_line, true, &line_entry);
}
}
bool CompileUnit::GetIsOptimized() {
if (m_is_optimized == eLazyBoolCalculate) {
m_is_optimized = eLazyBoolNo;
if (SymbolFile *symfile = GetModule()->GetSymbolFile()) {
if (symfile->ParseIsOptimized(*this))
m_is_optimized = eLazyBoolYes;
}
}
return m_is_optimized;
}
void CompileUnit::SetVariableList(VariableListSP &variables) {
m_variables = variables;
}
const std::vector<SourceModule> &CompileUnit::GetImportedModules() {
if (m_imported_modules.empty() &&
m_flags.IsClear(flagsParsedImportedModules)) {
m_flags.Set(flagsParsedImportedModules);
if (SymbolFile *symfile = GetModule()->GetSymbolFile()) {
SymbolContext sc;
CalculateSymbolContext(&sc);
symfile->ParseImportedModules(sc, m_imported_modules);
}
}
return m_imported_modules;
}
bool CompileUnit::ForEachExternalModule(
llvm::DenseSet<SymbolFile *> &visited_symbol_files,
llvm::function_ref<bool(Module &)> lambda) {
if (SymbolFile *symfile = GetModule()->GetSymbolFile())
return symfile->ForEachExternalModule(*this, visited_symbol_files, lambda);
return false;
}
const FileSpecList &CompileUnit::GetSupportFiles() {
if (m_support_files.GetSize() == 0) {
if (m_flags.IsClear(flagsParsedSupportFiles)) {
m_flags.Set(flagsParsedSupportFiles);
if (SymbolFile *symfile = GetModule()->GetSymbolFile())
symfile->ParseSupportFiles(*this, m_support_files);
}
}
return m_support_files;
}
void *CompileUnit::GetUserData() const { return m_user_data; }
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