[DWARF] Align non-accelerated function fullname searching with the apple-tables path
Summary: Before this patch the two paths were doing very different things - the apple path searched the .apple_names section, which contained mangled names, as well as basenames of all functions. It returned any name it found. - the non-accelerated path looked in the "full name" index we built ourselves, which contained mangled as well as demangled names of all functions (but no basenames). Then however, if it did not find a match it did an extra search in the basename index, with some special handling for anonymous namespaces. This aligns the two paths by changing the non-accelerated path to return the same results as in the apple-tables one. In pratice, this means we will search in both the "basename", "method" and "fullname" indexes (in the manual indexes these are separate indexes. This means the function will return some slightly inappropriate results (e.g. bar::baz::foo when one asks for a "full name" foo), but this can be handled by additional filtering, independently indexing method. I've also stopped inserting demangled names into the "fullname" index, as that is inconsistent with the apple path. Reviewers: clayborg, JDevlieghere Subscribers: lldb-commits Differential Revision: https://reviews.llvm.org/D46576 llvm-svn: 331855
This commit is contained in:
Pavel Labath
parent
349fdaab92
commit
80d48155cf
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@ -8,6 +8,8 @@
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// RUN: FileCheck --check-prefix=METHOD %s
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// RUN: lldb-test symbols --name=foo --find=function --function-flags=full %t | \
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// RUN: FileCheck --check-prefix=FULL %s
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// RUN: lldb-test symbols --name=_Z3fooi --find=function --function-flags=full %t | \
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// RUN: FileCheck --check-prefix=FULL-MANGLED %s
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// RUN: lldb-test symbols --name=foo --context=context --find=function --function-flags=base %t | \
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// RUN: FileCheck --check-prefix=CONTEXT %s
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// RUN: lldb-test symbols --name=not_there --find=function %t | \
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@ -24,9 +26,17 @@
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// METHOD-DAG: name = "sbar::foo(int)", mangled = "_ZN4sbar3fooEi"
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// METHOD-DAG: name = "ffbar()::sbar::foo()", mangled = "_ZZ5ffbarvEN4sbar3fooEv"
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// FULL: Found 2 functions:
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// FULL: Found 7 functions:
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// FULL-DAG: name = "foo()", mangled = "_Z3foov"
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// FULL-DAG: name = "foo(int)", mangled = "_Z3fooi"
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// FULL-DAG: name = "bar::foo()", mangled = "_ZN3bar3fooEv"
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// FULL-DAG: name = "bar::baz::foo()", mangled = "_ZN3bar3baz3fooEv"
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// FULL-DAG: name = "sbar::foo()", mangled = "_ZN4sbar3fooEv"
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// FULL-DAG: name = "sbar::foo(int)", mangled = "_ZN4sbar3fooEi"
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// FULL-DAG: name = "ffbar()::sbar::foo()", mangled = "_ZZ5ffbarvEN4sbar3fooEv"
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// FULL-MANGLED: Found 1 functions:
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// FULL-DAG: name = "foo(int)", mangled = "_Z3fooi"
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// CONTEXT: Found 1 functions:
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// CONTEXT-DAG: name = "bar::foo()", mangled = "_ZN3bar3fooEv"
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@ -897,12 +897,7 @@ void DWARFUnit::IndexPrivate(
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if (name && name != mangled_cstr &&
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((mangled_cstr[0] == '_') ||
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(::strcmp(name, mangled_cstr) != 0))) {
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Mangled mangled(ConstString(mangled_cstr), true);
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func_fullnames.Insert(mangled.GetMangledName(),
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DIERef(cu_offset, die.GetOffset()));
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ConstString demangled = mangled.GetDemangledName(cu_language);
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if (demangled)
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func_fullnames.Insert(demangled,
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func_fullnames.Insert(ConstString(mangled_cstr),
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DIERef(cu_offset, die.GetOffset()));
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}
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}
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@ -922,12 +917,7 @@ void DWARFUnit::IndexPrivate(
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if (name && name != mangled_cstr &&
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((mangled_cstr[0] == '_') ||
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(::strcmp(name, mangled_cstr) != 0))) {
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Mangled mangled(ConstString(mangled_cstr), true);
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func_fullnames.Insert(mangled.GetMangledName(),
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DIERef(cu_offset, die.GetOffset()));
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ConstString demangled = mangled.GetDemangledName(cu_language);
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if (demangled)
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func_fullnames.Insert(demangled,
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func_fullnames.Insert(ConstString(mangled_cstr),
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DIERef(cu_offset, die.GetOffset()));
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}
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} else
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@ -2626,44 +2626,26 @@ SymbolFileDWARF::FindFunctions(const ConstString &name,
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if (!m_indexed)
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Index();
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if (name_type_mask & eFunctionNameTypeFull) {
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FindFunctions(name, m_function_fullname_index, include_inlines, sc_list);
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// FIXME Temporary workaround for global/anonymous namespace
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// functions debugging FreeBSD and Linux binaries. If we didn't find any
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// functions in the global namespace try looking in the basename index
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// but ignore any returned functions that have a namespace but keep
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// functions which have an anonymous namespace
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// TODO: The arch in the object file isn't correct for MSVC
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// binaries on windows, we should find a way to make it correct and
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// handle those symbols as well.
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if (sc_list.GetSize() == original_size) {
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ArchSpec arch;
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if (!parent_decl_ctx && GetObjectFile()->GetArchitecture(arch) &&
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arch.GetTriple().isOSBinFormatELF()) {
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SymbolContextList temp_sc_list;
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FindFunctions(name, m_function_basename_index, include_inlines,
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temp_sc_list);
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SymbolContext sc;
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for (uint32_t i = 0; i < temp_sc_list.GetSize(); i++) {
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if (temp_sc_list.GetContextAtIndex(i, sc)) {
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ConstString mangled_name =
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sc.GetFunctionName(Mangled::ePreferMangled);
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ConstString demangled_name =
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sc.GetFunctionName(Mangled::ePreferDemangled);
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// Mangled names on Linux and FreeBSD are of the form:
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// _ZN18function_namespace13function_nameEv.
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if (strncmp(mangled_name.GetCString(), "_ZN", 3) ||
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!strncmp(demangled_name.GetCString(), "(anonymous namespace)",
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21)) {
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sc_list.Append(sc);
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}
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}
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}
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}
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}
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}
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DIEArray die_offsets;
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if (name_type_mask & eFunctionNameTypeFull) {
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uint32_t num_matches = m_function_basename_index.Find(name, die_offsets);
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num_matches += m_function_method_index.Find(name, die_offsets);
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num_matches += m_function_fullname_index.Find(name, die_offsets);
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for (uint32_t i = 0; i < num_matches; i++) {
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const DIERef &die_ref = die_offsets[i];
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DWARFDIE die = info->GetDIE(die_ref);
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if (die) {
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if (!DIEInDeclContext(parent_decl_ctx, die))
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continue; // The containing decl contexts don't match
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if (resolved_dies.find(die.GetDIE()) == resolved_dies.end()) {
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if (ResolveFunction(die, include_inlines, sc_list))
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resolved_dies.insert(die.GetDIE());
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}
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}
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}
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die_offsets.clear();
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}
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if (name_type_mask & eFunctionNameTypeBase) {
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uint32_t num_base = m_function_basename_index.Find(name, die_offsets);
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for (uint32_t i = 0; i < num_base; i++) {
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