aleksandr.urakov created this revision.
aleksandr.urakov added reviewers: zturner, asmith, labath.
aleksandr.urakov added a project: LLDB.
Herald added a subscriber: lldb-commits.
This patch adds possibility of searching a public symbol with name and type in
a symbol file, not only in a symtab. It is helpful when working with PE,
because PE's symtabs contain only imported / exported symbols only. Such a
search is required for e.g. evaluation of an expression that calls some
function of the debuggee.
A few weeks ago on `lldb-dev` there was a discussion of this, it is called
`Symtab for PECOFF`.
Repository:
rLLDB LLDB
https://reviews.llvm.org/D53368
Files:
include/lldb/Symbol/SymbolFile.h
include/lldb/Symbol/SymbolVendor.h
include/lldb/lldb-forward.h
source/Core/Module.cpp
source/Plugins/SymbolFile/PDB/SymbolFilePDB.cpp
source/Plugins/SymbolFile/PDB/SymbolFilePDB.h
source/Symbol/SymbolFile.cpp
source/Symbol/SymbolVendor.cpp
unittests/SymbolFile/PDB/SymbolFilePDBTests.cpp
Index: unittests/SymbolFile/PDB/SymbolFilePDBTests.cpp
===================================================================
--- unittests/SymbolFile/PDB/SymbolFilePDBTests.cpp
+++ unittests/SymbolFile/PDB/SymbolFilePDBTests.cpp
@@ -615,3 +615,20 @@
EXPECT_EQ(0u, num_results);
EXPECT_EQ(0u, results.GetSize());
}
+
+TEST_F(SymbolFilePDBTests, TestFindSymbolsWithNameAndType) {
+ FileSpec fspec(m_pdb_test_exe.c_str(), false);
+ ArchSpec aspec("i686-pc-windows");
+ lldb::ModuleSP module = std::make_shared<Module>(fspec, aspec);
+
+ SymbolContextList sc_list;
+ EXPECT_EQ(1u,
+ module->FindSymbolsWithNameAndType(ConstString("?foo@@YAHH@Z"),
+ lldb::eSymbolTypeAny, sc_list));
+ EXPECT_EQ(1u, sc_list.GetSize());
+
+ SymbolContext sc;
+ EXPECT_TRUE(sc_list.GetContextAtIndex(0, sc));
+ EXPECT_STREQ("int foo(int)",
+ sc.GetFunctionName(Mangled::ePreferDemangled).AsCString());
+}
Index: source/Symbol/SymbolVendor.cpp
===================================================================
--- source/Symbol/SymbolVendor.cpp
+++ source/Symbol/SymbolVendor.cpp
@@ -314,6 +314,18 @@
return 0;
}
+size_t SymbolVendor::FindPublicSymbols(const ConstString &name,
+ lldb::SymbolType type, bool append,
+ SymbolContextList &sc_list) {
+ ModuleSP module_sp(GetModule());
+ if (module_sp) {
+ std::lock_guard<std::recursive_mutex> guard(module_sp->GetMutex());
+ if (m_sym_file_ap.get())
+ return m_sym_file_ap->FindPublicSymbols(name, type, append, sc_list);
+ }
+ return 0;
+}
+
size_t SymbolVendor::FindTypes(
const SymbolContext &sc, const ConstString &name,
const CompilerDeclContext *parent_decl_ctx, bool append, size_t max_matches,
Index: source/Symbol/SymbolFile.cpp
===================================================================
--- source/Symbol/SymbolFile.cpp
+++ source/Symbol/SymbolFile.cpp
@@ -127,6 +127,14 @@
return 0;
}
+size_t SymbolFile::FindPublicSymbols(const ConstString &name,
+ lldb::SymbolType type, bool append,
+ SymbolContextList &sc_list) {
+ if (!append)
+ sc_list.Clear();
+ return 0;
+}
+
void SymbolFile::GetMangledNamesForFunction(
const std::string &scope_qualified_name,
std::vector<ConstString> &mangled_names) {
Index: source/Plugins/SymbolFile/PDB/SymbolFilePDB.h
===================================================================
--- source/Plugins/SymbolFile/PDB/SymbolFilePDB.h
+++ source/Plugins/SymbolFile/PDB/SymbolFilePDB.h
@@ -132,6 +132,10 @@
const std::string &scope_qualified_name,
std::vector<lldb_private::ConstString> &mangled_names) override;
+ size_t FindPublicSymbols(const lldb_private::ConstString &name,
+ lldb::SymbolType type, bool append,
+ lldb_private::SymbolContextList &sc_list) override;
+
uint32_t
FindTypes(const lldb_private::SymbolContext &sc,
const lldb_private::ConstString &name,
@@ -227,9 +231,13 @@
bool DeclContextMatchesThisSymbolFile(
const lldb_private::CompilerDeclContext *decl_ctx);
+ lldb_private::Symbol *
+ GetPublicSymbol(const llvm::pdb::PDBSymbolPublicSymbol &pub_symbol);
+
llvm::DenseMap<uint32_t, lldb::CompUnitSP> m_comp_units;
llvm::DenseMap<uint32_t, lldb::TypeSP> m_types;
llvm::DenseMap<uint32_t, lldb::VariableSP> m_variables;
+ llvm::DenseMap<uint32_t, lldb::SymbolSP> m_public_symbols;
std::vector<lldb::TypeSP> m_builtin_types;
std::unique_ptr<llvm::pdb::IPDBSession> m_session_up;
Index: source/Plugins/SymbolFile/PDB/SymbolFilePDB.cpp
===================================================================
--- source/Plugins/SymbolFile/PDB/SymbolFilePDB.cpp
+++ source/Plugins/SymbolFile/PDB/SymbolFilePDB.cpp
@@ -1339,6 +1339,42 @@
const std::string &scope_qualified_name,
std::vector<lldb_private::ConstString> &mangled_names) {}
+size_t
+SymbolFilePDB::FindPublicSymbols(const lldb_private::ConstString &name,
+ lldb::SymbolType type, bool append,
+ lldb_private::SymbolContextList &sc_list) {
+ if (!append)
+ sc_list.Clear();
+
+ auto results = m_global_scope_up->findChildren(
+ PDB_SymType::PublicSymbol, name.GetStringRef(), NS_Default);
+ if (!results)
+ return 0;
+
+ size_t count = 0;
+ while (auto symbol = results->getNext()) {
+ auto pub_symbol =
+ llvm::dyn_cast_or_null<PDBSymbolPublicSymbol>(symbol.get());
+ if (!pub_symbol)
+ continue;
+
+ auto symbol_ptr = GetPublicSymbol(*pub_symbol);
+ if (!symbol_ptr)
+ continue;
+
+ if (type != eSymbolTypeAny && symbol_ptr->GetType() != type)
+ continue;
+
+ SymbolContext sc;
+ sc.symbol = symbol_ptr;
+ sc_list.Append(sc);
+
+ count++;
+ }
+
+ return count;
+}
+
uint32_t SymbolFilePDB::FindTypes(
const lldb_private::SymbolContext &sc,
const lldb_private::ConstString &name,
@@ -1882,3 +1918,45 @@
return false;
}
+
+lldb_private::Symbol *SymbolFilePDB::GetPublicSymbol(
+ const llvm::pdb::PDBSymbolPublicSymbol &pub_symbol) {
+ auto it = m_public_symbols.find(pub_symbol.getSymIndexId());
+ if (it != m_public_symbols.end())
+ return it->second.get();
+
+ auto section_list = m_obj_file->GetSectionList();
+ if (!section_list)
+ return nullptr;
+
+ auto section_idx = pub_symbol.getAddressSection() - 1;
+ if (section_idx >= section_list->GetSize())
+ return nullptr;
+
+ auto section = section_list->GetSectionAtIndex(section_idx);
+ if (!section)
+ return nullptr;
+
+ auto size = pub_symbol.getLength();
+
+ auto symbol_sp = std::make_shared<Symbol>(
+ pub_symbol.getSymIndexId(), // symID
+ pub_symbol.getName().c_str(), // name
+ true, // name_is_mangled
+ pub_symbol.isCode() ? eSymbolTypeCode : eSymbolTypeData, // type
+ true, // external
+ false, // is_debug
+ false, // is_trampoline
+ false, // is_artificial
+ section, // section_sp
+ pub_symbol.getAddressOffset(), // value
+ size, // size
+ size != 0, // size_is_valid
+ false, // contains_linker_annotations
+ 0 // flags
+ );
+
+ m_public_symbols[pub_symbol.getSymIndexId()] = symbol_sp;
+
+ return symbol_sp.get();
+}
Index: source/Core/Module.cpp
===================================================================
--- source/Core/Module.cpp
+++ source/Core/Module.cpp
@@ -1366,6 +1366,8 @@
const size_t initial_size = sc_list.GetSize();
SymbolVendor *sym_vendor = GetSymbolVendor();
if (sym_vendor) {
+ sym_vendor->FindPublicSymbols(name, symbol_type, true, sc_list);
+
Symtab *symtab = sym_vendor->GetSymtab();
if (symtab) {
std::vector<uint32_t> symbol_indexes;
Index: include/lldb/lldb-forward.h
===================================================================
--- include/lldb/lldb-forward.h
+++ include/lldb/lldb-forward.h
@@ -441,6 +441,7 @@
StructuredDataPluginSP;
typedef std::weak_ptr<lldb_private::StructuredDataPlugin>
StructuredDataPluginWP;
+typedef std::shared_ptr<lldb_private::Symbol> SymbolSP;
typedef std::shared_ptr<lldb_private::SymbolFile> SymbolFileSP;
typedef std::shared_ptr<lldb_private::SymbolFileType> SymbolFileTypeSP;
typedef std::weak_ptr<lldb_private::SymbolFileType> SymbolFileTypeWP;
Index: include/lldb/Symbol/SymbolVendor.h
===================================================================
--- include/lldb/Symbol/SymbolVendor.h
+++ include/lldb/Symbol/SymbolVendor.h
@@ -97,6 +97,10 @@
bool include_inlines, bool append,
SymbolContextList &sc_list);
+ virtual size_t FindPublicSymbols(const ConstString &name,
+ lldb::SymbolType type, bool append,
+ SymbolContextList &sc_list);
+
virtual size_t
FindTypes(const SymbolContext &sc, const ConstString &name,
const CompilerDeclContext *parent_decl_ctx, bool append,
Index: include/lldb/Symbol/SymbolFile.h
===================================================================
--- include/lldb/Symbol/SymbolFile.h
+++ include/lldb/Symbol/SymbolFile.h
@@ -161,6 +161,9 @@
virtual uint32_t FindFunctions(const RegularExpression ®ex,
bool include_inlines, bool append,
SymbolContextList &sc_list);
+ virtual size_t FindPublicSymbols(const ConstString &name,
+ lldb::SymbolType type, bool append,
+ SymbolContextList &sc_list);
virtual uint32_t
FindTypes(const SymbolContext &sc, const ConstString &name,
const CompilerDeclContext *parent_decl_ctx, bool append,
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