r214410 - Exposes a C API to name mangling for a given cursor.
Eli Bendersky
eliben at google.com
Thu Jul 31 12:39:02 PDT 2014
On Thu, Jul 31, 2014 at 11:30 AM, Rafael Avila de Espindola <
rafael.espindola at gmail.com> wrote:
> This is the LLVM level name, right? For example, it doesn't include a
> leading underscore on Mach-o, correct? Can you document that?
Yes, this is frontend-level mangling.
> Wouldn't it be more useful (and stable) to provide the fully mangled name?
>
I'm not sure how to access those parts of LLVM from libclang. Besides, IIRC
targets are not linked into libclang. Do you have an idea?
Eli
> Sent from my iPhone
>
> > On Jul 31, 2014, at 14:04, Eli Bendersky <eliben at google.com> wrote:
> >
> > Author: eliben
> > Date: Thu Jul 31 13:04:56 2014
> > New Revision: 214410
> >
> > URL: http://llvm.org/viewvc/llvm-project?rev=214410&view=rev
> > Log:
> > Exposes a C API to name mangling for a given cursor.
> >
> > Inspired by https://gist.github.com/tritao/2766291, and was previously
> discussed
> > on cfe-dev:
> http://lists.cs.uiuc.edu/pipermail/cfe-dev/2014-June/037577.html
> >
> > Adding testing capability via c-index-test.
> >
> >
> >
> > Added:
> > cfe/trunk/test/Index/print-mangled-name.cpp
> > Modified:
> > cfe/trunk/include/clang-c/Index.h
> > cfe/trunk/tools/c-index-test/c-index-test.c
> > cfe/trunk/tools/libclang/CIndex.cpp
> > cfe/trunk/tools/libclang/libclang.exports
> >
> > Modified: cfe/trunk/include/clang-c/Index.h
> > URL:
> http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang-c/Index.h?rev=214410&r1=214409&r2=214410&view=diff
> >
> ==============================================================================
> > --- cfe/trunk/include/clang-c/Index.h (original)
> > +++ cfe/trunk/include/clang-c/Index.h Thu Jul 31 13:04:56 2014
> > @@ -3639,6 +3639,20 @@ CINDEX_LINKAGE CXString clang_Cursor_get
> > * @}
> > */
> >
> > +/** \defgroup CINDEX_MANGLE Name Mangling API Functions
> > + *
> > + * @{
> > + */
> > +
> > +/**
> > + * \brief Retrieve the CXString representing the mangled name of the
> cursor.
> > + */
> > +CINDEX_LINKAGE CXString clang_Cursor_getMangling(CXCursor);
> > +
> > +/**
> > + * @}
> > + */
> > +
> > /**
> > * \defgroup CINDEX_MODULE Module introspection
> > *
> >
> > Added: cfe/trunk/test/Index/print-mangled-name.cpp
> > URL:
> http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Index/print-mangled-name.cpp?rev=214410&view=auto
> >
> ==============================================================================
> > --- cfe/trunk/test/Index/print-mangled-name.cpp (added)
> > +++ cfe/trunk/test/Index/print-mangled-name.cpp Thu Jul 31 13:04:56 2014
> > @@ -0,0 +1,23 @@
> > +// RUN: %clang_cc1 -triple i686-pc-linux-gnu -emit-pch %s -o
> %t_linux.ast
> > +// RUN: c-index-test -test-print-mangle %t_linux.ast | FileCheck %s
> --check-prefix=ITANIUM
> > +
> > +// RUN: %clang_cc1 -triple i686-pc-win32 -emit-pch %s -o %t_msft.ast
> > +// RUN: c-index-test -test-print-mangle %t_msft.ast | FileCheck %s
> --check-prefix=MICROSOFT
> > +
> > +int foo(int, int);
> > +// ITANIUM: mangled=_Z3fooii
> > +// MICROSOFT: mangled=?foo@@YAHHH
> > +
> > +int foo(float, int);
> > +// ITANIUM: mangled=_Z3foofi
> > +// MICROSOFT: mangled=?foo@@YAHMH
> > +
> > +struct S {
> > + int x, y;
> > +};
> > +// ITANIUM: StructDecl{{.*}}mangled=]
> > +// MICROSOFT: StructDecl{{.*}}mangled=]
> > +
> > +int foo(S, S&);
> > +// ITANIUM: mangled=_Z3foo1SRS
> > +// MICROSOFT: mangled=?foo@@YAHUS
> >
> > Modified: cfe/trunk/tools/c-index-test/c-index-test.c
> > URL:
> http://llvm.org/viewvc/llvm-project/cfe/trunk/tools/c-index-test/c-index-test.c?rev=214410&r1=214409&r2=214410&view=diff
> >
> ==============================================================================
> > --- cfe/trunk/tools/c-index-test/c-index-test.c (original)
> > +++ cfe/trunk/tools/c-index-test/c-index-test.c Thu Jul 31 13:04:56 2014
> > @@ -1363,6 +1363,19 @@ static enum CXChildVisitResult PrintType
> > }
> >
> >
> /******************************************************************************/
> > +/* Mangling testing.
> */
> >
> +/******************************************************************************/
> > +
> > +static enum CXChildVisitResult PrintMangledName(CXCursor cursor,
> CXCursor p,
> > + CXClientData d) {
> > + CXString MangledName;
> > + PrintCursor(cursor, NULL);
> > + MangledName = clang_Cursor_getMangling(cursor);
> > + printf(" [mangled=%s]\n", clang_getCString(MangledName));
> > + return CXChildVisit_Continue;
> > +}
> > +
> >
> +/******************************************************************************/
> > /* Bitwidth testing.
> */
> >
> /******************************************************************************/
> >
> > @@ -4081,6 +4094,8 @@ int cindextest_main(int argc, const char
> > else if (argc > 2 && strcmp(argv[1], "-test-print-bitwidth") == 0)
> > return perform_test_load_source(argc - 2, argv + 2, "all",
> > PrintBitWidth, 0);
> > + else if (argc > 2 && strcmp(argv[1], "-test-print-mangle") == 0)
> > + return perform_test_load_tu(argv[2], "all", NULL, PrintMangledName,
> NULL);
> > else if (argc > 1 && strcmp(argv[1], "-print-usr") == 0) {
> > if (argc > 2)
> > return print_usrs(argv + 2, argv + argc);
> >
> > Modified: cfe/trunk/tools/libclang/CIndex.cpp
> > URL:
> http://llvm.org/viewvc/llvm-project/cfe/trunk/tools/libclang/CIndex.cpp?rev=214410&r1=214409&r2=214410&view=diff
> >
> ==============================================================================
> > --- cfe/trunk/tools/libclang/CIndex.cpp (original)
> > +++ cfe/trunk/tools/libclang/CIndex.cpp Thu Jul 31 13:04:56 2014
> > @@ -22,6 +22,7 @@
> > #include "CXType.h"
> > #include "CursorVisitor.h"
> > #include "clang/AST/Attr.h"
> > +#include "clang/AST/Mangle.h"
> > #include "clang/AST/StmtVisitor.h"
> > #include "clang/Basic/Diagnostic.h"
> > #include "clang/Basic/DiagnosticCategories.h"
> > @@ -3667,6 +3668,31 @@ CXSourceRange clang_Cursor_getSpellingNa
> > return cxloc::translateSourceRange(Ctx, Loc);
> > }
> >
> > +CXString clang_Cursor_getMangling(CXCursor C) {
> > + if (clang_isInvalid(C.kind) || !clang_isDeclaration(C.kind))
> > + return cxstring::createEmpty();
> > +
> > + const Decl *D = getCursorDecl(C);
> > + // Mangling only works for functions and variables.
> > + if (!D || !(isa<FunctionDecl>(D) || isa<VarDecl>(D)))
> > + return cxstring::createEmpty();
> > +
> > + const NamedDecl *ND = cast<NamedDecl>(D);
> > + std::unique_ptr<MangleContext>
> MC(ND->getASTContext().createMangleContext());
> > +
> > + std::string Buf;
> > + llvm::raw_string_ostream OS(Buf);
> > + MC->mangleName(ND, OS);
> > + OS.flush();
> > +
> > + // The Microsoft mangler may insert a special character in the
> beginning to
> > + // prevent further mangling. We can strip that for display purposes.
> > + if (Buf[0] == '\x01') {
> > + Buf.erase(0, 1);
> > + }
> > + return cxstring::createDup(Buf);
> > +}
> > +
> > CXString clang_getCursorDisplayName(CXCursor C) {
> > if (!clang_isDeclaration(C.kind))
> > return clang_getCursorSpelling(C);
> >
> > Modified: cfe/trunk/tools/libclang/libclang.exports
> > URL:
> http://llvm.org/viewvc/llvm-project/cfe/trunk/tools/libclang/libclang.exports?rev=214410&r1=214409&r2=214410&view=diff
> >
> ==============================================================================
> > --- cfe/trunk/tools/libclang/libclang.exports (original)
> > +++ cfe/trunk/tools/libclang/libclang.exports Thu Jul 31 13:04:56 2014
> > @@ -9,6 +9,7 @@ clang_CXXMethod_isVirtual
> > clang_Cursor_getArgument
> > clang_Cursor_getBriefCommentText
> > clang_Cursor_getCommentRange
> > +clang_Cursor_getMangling
> > clang_Cursor_getParsedComment
> > clang_Cursor_getRawCommentText
> > clang_Cursor_getNumArguments
> >
> >
> > _______________________________________________
> > cfe-commits mailing list
> > cfe-commits at cs.uiuc.edu
> > http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits
>
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