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llvm-mirror/test/Demangle/ms-back-references.test
Zachary Turner 696ab67afc [MS Demangler] Fix several crashes and demangling bugs. 
These bugs were found by writing a Python script which spidered
the entire Chromium build directory tree demangling every symbol
in every object file.  At the start, the tool printed:

  Processed 27443 object files.
  2926377/2936108 symbols successfully demangled (99.6686%)
  9731 symbols could not be demangled (0.3314%)
  14589 files crashed while demangling (53.1611%)

After this patch, it prints:

  Processed 27443 object files.
  41295518/41295617 symbols successfully demangled (99.9998%)
  99 symbols could not be demangled (0.0002%)
  0 files crashed while demangling (0.0000%)

The issues fixed in this patch are:

  * Ignore empty parameter packs.  Previously we would encounter
    a mangling for an empty parameter pack and add a null node
    to the AST.  Since we don't print these anyway, we now just
    don't add anything to the AST and ignore it entirely.  This
    fixes some of the crashes.

  * Account for "incorrect" string literal demanglings.  Apparently
    an older version of clang would not truncate mangled string
    literals to 32 bytes of encoded character data.  The demangling
    code however would allocate a 32 byte buffer thinking that it
    would not encounter more than this, and overrun the buffer.
    We now demangle up to 128 bytes of data, since the buggy
    clang would encode up to 32 *characters* of data.

  * Extended support for demangling init-fini stubs.  If you had
    something like
      struct Foo {
        static vector<string> S;
      };
    this would generate a dynamic atexit initializer *for the
    variable*.  We didn't handle this, but now we print something
    nice.  This is actually an improvement over undname, which will
    fail to demangle this at all.

  * Fixed one case of static this adjustment.  We weren't handling
    several thunk codes so we didn't recognize the mangling.  These
    are now handled.

  * Fixed a back-referencing problem.  Member pointer templates
    should have their components considered for back-referencing

The remaining 99 symbols which can't be demangled are all symbols
which are compiler-generated and undname can't demangle either.

llvm-svn: 341000
2018-08-29 23:56:09 +00:00

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; RUN: llvm-undname < %s | FileCheck %s
; CHECK-NOT: Invalid mangled name
?f1@@YAXPBD0@Z
; CHECK: void __cdecl f1(char const *, char const *)
?f2@@YAXPBDPAD@Z
; CHECK: void __cdecl f2(char const *, char *)
?f3@@YAXHPBD0@Z
; CHECK: void __cdecl f3(int, char const *, char const *)
?f4@@YAPBDPBD0@Z
; CHECK: char const * __cdecl f4(char const *, char const *)
?f5@@YAXPBDIDPBX0I@Z
; CHECK: void __cdecl f5(char const *, unsigned int, char, void const *, char const *, unsigned int)
?f6@@YAX_N0@Z
; CHECK: void __cdecl f6(bool, bool)
?f7@@YAXHPAHH0_N1PA_N@Z
; CHECK: void __cdecl f7(int, int *, int, int *, bool, bool, bool *)
?g1@@YAXUS@@@Z
; CHECK: void __cdecl g1(struct S)
?g2@@YAXUS@@0@Z
; CHECK: void __cdecl g2(struct S, struct S)
?g3@@YAXUS@@0PAU1@1@Z
; CHECK: void __cdecl g3(struct S, struct S, struct S *, struct S *)
?g4@@YAXPBDPAUS@@01@Z
; CHECK: void __cdecl g4(char const *, struct S *, char const *, struct S *)
?mbb@S@@QAEX_N0@Z
; CHECK: void __thiscall S::mbb(bool, bool)
?h1@@YAXPBD0P6AXXZ1@Z
; CHECK: void __cdecl h1(char const *, char const *, void (__cdecl *)(void), void (__cdecl *)(void))
?h2@@YAXP6AXPAX@Z0@Z
; CHECK: void __cdecl h2(void (__cdecl *)(void *), void *)
?h3@@YAP6APAHPAH0@ZP6APAH00@Z10@Z
; CHECK: int * (__cdecl * __cdecl h3(int * (__cdecl *)(int *, int *), int * (__cdecl *)(int *, int *), int *))(int *, int *)
?foo@0@YAXXZ
; CHECK: void __cdecl foo::foo(void)
??$?HH@S@@QEAAAEAU0@H@Z
; CHECK: struct S & __cdecl S::operator+<int>(int)
?foo_abbb@@YAXV?$A@V?$B@D@@V1@V1@@@@Z
; CHECK: void __cdecl foo_abbb(class A<class B<char>, class B<char>, class B<char>>)
?foo_abb@@YAXV?$A@DV?$B@D@@V1@@@@Z
; CHECK: void __cdecl foo_abb(class A<char, class B<char>, class B<char>>)
?foo_abc@@YAXV?$A@DV?$B@D@@V?$C@D@@@@@Z
; CHECK: void __cdecl foo_abc(class A<char, class B<char>, class C<char>>)
?foo_bt@@YAX_NV?$B@$$A6A_N_N@Z@@@Z
; CHECK: void __cdecl foo_bt(bool, class B<bool __cdecl(bool)>)
?foo_abbb@@YAXV?$A@V?$B@D@N@@V12@V12@@N@@@Z
; CHECK: void __cdecl foo_abbb(class N::A<class N::B<char>, class N::B<char>, class N::B<char>>)
?foo_abb@@YAXV?$A@DV?$B@D@N@@V12@@N@@@Z
; CHECK: void __cdecl foo_abb(class N::A<char, class N::B<char>, class N::B<char>>)
?foo_abc@@YAXV?$A@DV?$B@D@N@@V?$C@D@2@@N@@@Z
; CHECK: void __cdecl foo_abc(class N::A<char, class N::B<char>, class N::C<char>>)
?abc_foo@@YA?AV?$A@DV?$B@D@N@@V?$C@D@2@@N@@XZ
; CHECK: class N::A<char, class N::B<char>, class N::C<char>> __cdecl abc_foo(void)
?z_foo@@YA?AVZ@N@@V12@@Z
; CHECK: class N::Z __cdecl z_foo(class N::Z)
?b_foo@@YA?AV?$B@D@N@@V12@@Z
; CHECK: class N::B<char> __cdecl b_foo(class N::B<char>)
?d_foo@@YA?AV?$D@DD@N@@V12@@Z
; CHECK: class N::D<char, char> __cdecl d_foo(class N::D<char, char>)
?abc_foo_abc@@YA?AV?$A@DV?$B@D@N@@V?$C@D@2@@N@@V12@@Z
; CHECK: class N::A<char, class N::B<char>, class N::C<char>> __cdecl abc_foo_abc(class N::A<char, class N::B<char>, class N::C<char>>)
?foo5@@YAXV?$Y@V?$Y@V?$Y@V?$Y@VX@NA@@@NB@@@NA@@@NB@@@NA@@@Z
; CHECK: void __cdecl foo5(class NA::Y<class NB::Y<class NA::Y<class NB::Y<class NA::X>>>>)
?foo11@@YAXV?$Y@VX@NA@@@NA@@V1NB@@@Z
; CHECK: void __cdecl foo11(class NA::Y<class NA::X>, class NB::Y<class NA::X>)
?foo112@@YAXV?$Y@VX@NA@@@NA@@V?$Y@VX@NB@@@NB@@@Z
; CHECK: void __cdecl foo112(class NA::Y<class NA::X>, class NB::Y<class NB::X>)
?foo22@@YAXV?$Y@V?$Y@VX@NA@@@NB@@@NA@@V?$Y@V?$Y@VX@NA@@@NA@@@NB@@@Z
; CHECK: void __cdecl foo22(class NA::Y<class NB::Y<class NA::X>>, class NB::Y<class NA::Y<class NA::X>>)
?foo@L@PR13207@@QAEXV?$I@VA@PR13207@@@2@@Z
; CHECK: void __thiscall PR13207::L::foo(class PR13207::I<class PR13207::A>)
?foo@PR13207@@YAXV?$I@VA@PR13207@@@1@@Z
; CHECK: void __cdecl PR13207::foo(class PR13207::I<class PR13207::A>)
?foo2@PR13207@@YAXV?$I@VA@PR13207@@@1@0@Z
; CHECK: void __cdecl PR13207::foo2(class PR13207::I<class PR13207::A>, class PR13207::I<class PR13207::A>)
?bar@PR13207@@YAXV?$J@VA@PR13207@@VB@2@@1@@Z
; CHECK: void __cdecl PR13207::bar(class PR13207::J<class PR13207::A, class PR13207::B>)
?spam@PR13207@@YAXV?$K@VA@PR13207@@VB@2@VC@2@@1@@Z
; CHECK: void __cdecl PR13207::spam(class PR13207::K<class PR13207::A, class PR13207::B, class PR13207::C>)
?baz@PR13207@@YAXV?$K@DV?$F@D@PR13207@@V?$I@D@2@@1@@Z
; CHECK: void __cdecl PR13207::baz(class PR13207::K<char, class PR13207::F<char>, class PR13207::I<char>>)
?qux@PR13207@@YAXV?$K@DV?$I@D@PR13207@@V12@@1@@Z
; CHECK: void __cdecl PR13207::qux(class PR13207::K<char, class PR13207::I<char>, class PR13207::I<char>>)
?foo@NA@PR13207@@YAXV?$Y@VX@NA@PR13207@@@12@@Z
; CHECK: void __cdecl PR13207::NA::foo(class PR13207::NA::Y<class PR13207::NA::X>)
?foofoo@NA@PR13207@@YAXV?$Y@V?$Y@VX@NA@PR13207@@@NA@PR13207@@@12@@Z
; CHECK: void __cdecl PR13207::NA::foofoo(class PR13207::NA::Y<class PR13207::NA::Y<class PR13207::NA::X>>)
?foo@NB@PR13207@@YAXV?$Y@VX@NA@PR13207@@@12@@Z
; CHECK: void __cdecl PR13207::NB::foo(class PR13207::NB::Y<class PR13207::NA::X>)
?bar@NB@PR13207@@YAXV?$Y@VX@NB@PR13207@@@NA@2@@Z
; CHECK: void __cdecl PR13207::NB::bar(class PR13207::NA::Y<class PR13207::NB::X>)
?spam@NB@PR13207@@YAXV?$Y@VX@NA@PR13207@@@NA@2@@Z
; CHECK: void __cdecl PR13207::NB::spam(class PR13207::NA::Y<class PR13207::NA::X>)
?foobar@NB@PR13207@@YAXV?$Y@V?$Y@VX@NB@PR13207@@@NB@PR13207@@@NA@2@V312@@Z
; CHECK: void __cdecl PR13207::NB::foobar(class PR13207::NA::Y<class PR13207::NB::Y<class PR13207::NB::X>>, class PR13207::NB::Y<class PR13207::NB::Y<class PR13207::NB::X>>)
?foobarspam@NB@PR13207@@YAXV?$Y@VX@NB@PR13207@@@12@V?$Y@V?$Y@VX@NB@PR13207@@@NB@PR13207@@@NA@2@V412@@Z
; CHECK: void __cdecl PR13207::NB::foobarspam(class PR13207::NB::Y<class PR13207::NB::X>, class PR13207::NA::Y<class PR13207::NB::Y<class PR13207::NB::X>>, class PR13207::NB::Y<class PR13207::NB::Y<class PR13207::NB::X>>)
?foobarbaz@NB@PR13207@@YAXV?$Y@VX@NB@PR13207@@@12@V?$Y@V?$Y@VX@NB@PR13207@@@NB@PR13207@@@NA@2@V412@2@Z
; CHECK: void __cdecl PR13207::NB::foobarbaz(class PR13207::NB::Y<class PR13207::NB::X>, class PR13207::NA::Y<class PR13207::NB::Y<class PR13207::NB::X>>, class PR13207::NB::Y<class PR13207::NB::Y<class PR13207::NB::X>>, class PR13207::NB::Y<class PR13207::NB::Y<class PR13207::NB::X>>)
?foobarbazqux@NB@PR13207@@YAXV?$Y@VX@NB@PR13207@@@12@V?$Y@V?$Y@VX@NB@PR13207@@@NB@PR13207@@@NA@2@V412@2V?$Y@V?$Y@V?$Y@VX@NB@PR13207@@@NB@PR13207@@@NB@PR13207@@@52@@Z
; CHECK: void __cdecl PR13207::NB::foobarbazqux(class PR13207::NB::Y<class PR13207::NB::X>, class PR13207::NA::Y<class PR13207::NB::Y<class PR13207::NB::X>>, class PR13207::NB::Y<class PR13207::NB::Y<class PR13207::NB::X>>, class PR13207::NB::Y<class PR13207::NB::Y<class PR13207::NB::X>>, class PR13207::NA::Y<class PR13207::NB::Y<class PR13207::NB::Y<class PR13207::NB::X>>>)
?foo@NC@PR13207@@YAXV?$Y@VX@NB@PR13207@@@12@@Z
; CHECK: void __cdecl PR13207::NC::foo(class PR13207::NC::Y<class PR13207::NB::X>)
?foobar@NC@PR13207@@YAXV?$Y@V?$Y@V?$Y@VX@NA@PR13207@@@NA@PR13207@@@NB@PR13207@@@12@@Z
; CHECK: void __cdecl PR13207::NC::foobar(class PR13207::NC::Y<class PR13207::NB::Y<class PR13207::NA::Y<class PR13207::NA::X>>>)
?fun_normal@fn_space@@YA?AURetVal@1@H@Z
; CHECK: struct fn_space::RetVal __cdecl fn_space::fun_normal(int)
??$fun_tmpl@H@fn_space@@YA?AURetVal@0@ABH@Z
; CHECK: struct fn_space::RetVal __cdecl fn_space::fun_tmpl<int>(int const &)
??$fun_tmpl_recurse@H$1??$fun_tmpl_recurse@H$1?ident@fn_space@@YA?AURetVal@2@H@Z@fn_space@@YA?AURetVal@1@H@Z@fn_space@@YA?AURetVal@0@H@Z
; CHECK: struct fn_space::RetVal __cdecl fn_space::fun_tmpl_recurse<int, &struct fn_space::RetVal __cdecl fn_space::fun_tmpl_recurse<int, &struct fn_space::RetVal __cdecl fn_space::ident(int)>(int)>(int)
??$fun_tmpl_recurse@H$1?ident@fn_space@@YA?AURetVal@2@H@Z@fn_space@@YA?AURetVal@0@H@Z
; CHECK: struct fn_space::RetVal __cdecl fn_space::fun_tmpl_recurse<int, &struct fn_space::RetVal __cdecl fn_space::ident(int)>(int)
?AddEmitPasses@EmitAssemblyHelper@?A0x43583946@@AEAA_NAEAVPassManager@legacy@llvm@@W4BackendAction@clang@@AEAVraw_pwrite_stream@5@PEAV85@@Z
; CHECK: bool __cdecl `anonymous namespace'::EmitAssemblyHelper::AddEmitPasses(class llvm::legacy::PassManager &, enum clang::BackendAction, class llvm::raw_pwrite_stream &, class llvm::raw_pwrite_stream *)
??$forward@P8?$DecoderStream@$01@media@@AEXXZ@std@@YA$$QAP8?$DecoderStream@$01@media@@AEXXZAAP812@AEXXZ@Z
; CHECK: void (__thiscall media::DecoderStream<2>::*&& __cdecl std::forward<void (__thiscall media::DecoderStream<2>::*)(void)>(void (__thiscall media::DecoderStream<2>::*&)(void)))(void)
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