[Lldb-commits] [lldb] 8612e92 - [lldb][NFC] Remove GetASTContext call in ClangDeclVendor

Shafik Yaghmour via lldb-commits lldb-commits at lists.llvm.org
Thu Jan 2 15:38:01 PST 2020


I am not crazy about the reinterpret_cast although if we look inside CompilerDecl impl we can see that basically it is always assuming it is a Decl* and just C-style casts it as such. So why not just make it a Decl*

Also operator<(…) is super sketchy doing a < on void* 

> On Dec 28, 2019, at 6:52 AM, Raphael Isemann via lldb-commits <lldb-commits at lists.llvm.org> wrote:
> 
> 
> Author: Raphael Isemann
> Date: 2019-12-28T15:20:19+01:00
> New Revision: 8612e92ed590e615f9f56e4fb86a1fdaf3a39e15
> 
> URL: https://github.com/llvm/llvm-project/commit/8612e92ed590e615f9f56e4fb86a1fdaf3a39e15
> DIFF: https://github.com/llvm/llvm-project/commit/8612e92ed590e615f9f56e4fb86a1fdaf3a39e15.diff
> 
> LOG: [lldb][NFC] Remove GetASTContext call in ClangDeclVendor
> 
> Instead of returning NamedDecls and then calling GetASTContext
> to find back the ClangASTContext we used can just implement the
> FindDecl variant that returns CompilerDecls (and implement the
> other function by throwing away the ClangASTContext part of the
> compiler decl).
> 
> Added: 
> 
> 
> Modified: 
>    lldb/source/Plugins/ExpressionParser/Clang/ClangDeclVendor.cpp
>    lldb/source/Plugins/ExpressionParser/Clang/ClangDeclVendor.h
>    lldb/source/Plugins/ExpressionParser/Clang/ClangModulesDeclVendor.cpp
>    lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCDeclVendor.cpp
>    lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCDeclVendor.h
> 
> Removed: 
> 
> 
> 
> ################################################################################
> diff  --git a/lldb/source/Plugins/ExpressionParser/Clang/ClangDeclVendor.cpp b/lldb/source/Plugins/ExpressionParser/Clang/ClangDeclVendor.cpp
> index c59722b7b4f8..0c5796650d45 100644
> --- a/lldb/source/Plugins/ExpressionParser/Clang/ClangDeclVendor.cpp
> +++ b/lldb/source/Plugins/ExpressionParser/Clang/ClangDeclVendor.cpp
> @@ -15,16 +15,17 @@ using namespace lldb_private;
> 
> uint32_t ClangDeclVendor::FindDecls(ConstString name, bool append,
>                                     uint32_t max_matches,
> -                                    std::vector<CompilerDecl> &decls) {
> +                                    std::vector<clang::NamedDecl *> &decls) {
>   if (!append)
>     decls.clear();
> 
> -  std::vector<clang::NamedDecl *> named_decls;
> -  uint32_t ret = FindDecls(name, /*append*/ false, max_matches, named_decls);
> -  for (auto *named_decl : named_decls) {
> -    decls.push_back(CompilerDecl(
> -        ClangASTContext::GetASTContext(&named_decl->getASTContext()),
> -        named_decl));
> +  std::vector<CompilerDecl> compiler_decls;
> +  uint32_t ret = FindDecls(name, /*append*/ false, max_matches, compiler_decls);
> +  for (CompilerDecl compiler_decl : compiler_decls) {
> +    clang::Decl *d =
> +        reinterpret_cast<clang::Decl *>(compiler_decl.GetOpaqueDecl());
> +    clang::NamedDecl *nd = llvm::cast<clang::NamedDecl>(d);
> +    decls.push_back(nd);
>   }
>   return ret;
> }
> 
> diff  --git a/lldb/source/Plugins/ExpressionParser/Clang/ClangDeclVendor.h b/lldb/source/Plugins/ExpressionParser/Clang/ClangDeclVendor.h
> index 85a10400a201..0c888de08841 100644
> --- a/lldb/source/Plugins/ExpressionParser/Clang/ClangDeclVendor.h
> +++ b/lldb/source/Plugins/ExpressionParser/Clang/ClangDeclVendor.h
> @@ -21,12 +21,10 @@ class ClangDeclVendor : public DeclVendor {
> 
>   virtual ~ClangDeclVendor() {}
> 
> -  uint32_t FindDecls(ConstString name, bool append, uint32_t max_matches,
> -                     std::vector<CompilerDecl> &decls) override;
> +  using DeclVendor::FindDecls;
> 
> -  virtual uint32_t FindDecls(ConstString name, bool append,
> -                             uint32_t max_matches,
> -                             std::vector<clang::NamedDecl *> &decls) = 0;
> +  uint32_t FindDecls(ConstString name, bool append, uint32_t max_matches,
> +                     std::vector<clang::NamedDecl *> &decls);
> 
>   static bool classof(const DeclVendor *vendor) {
>     return vendor->GetKind() >= eClangDeclVendor &&
> 
> diff  --git a/lldb/source/Plugins/ExpressionParser/Clang/ClangModulesDeclVendor.cpp b/lldb/source/Plugins/ExpressionParser/Clang/ClangModulesDeclVendor.cpp
> index ff0905dda4ef..0696c669f2e2 100644
> --- a/lldb/source/Plugins/ExpressionParser/Clang/ClangModulesDeclVendor.cpp
> +++ b/lldb/source/Plugins/ExpressionParser/Clang/ClangModulesDeclVendor.cpp
> @@ -80,7 +80,7 @@ class ClangModulesDeclVendorImpl : public ClangModulesDeclVendor {
>                                 Stream &error_stream) override;
> 
>   uint32_t FindDecls(ConstString name, bool append, uint32_t max_matches,
> -                     std::vector<clang::NamedDecl *> &decls) override;
> +                     std::vector<CompilerDecl> &decls) override;
> 
>   void ForEachMacro(const ModuleVector &modules,
>                     std::function<bool(const std::string &)> handler) override;
> @@ -356,7 +356,7 @@ bool ClangModulesDeclVendorImpl::AddModulesForCompileUnit(
> uint32_t
> ClangModulesDeclVendorImpl::FindDecls(ConstString name, bool append,
>                                       uint32_t max_matches,
> -                                      std::vector<clang::NamedDecl *> &decls) {
> +                                      std::vector<CompilerDecl> &decls) {
>   if (!m_enabled) {
>     return 0;
>   }
> @@ -382,7 +382,7 @@ ClangModulesDeclVendorImpl::FindDecls(ConstString name, bool append,
>     if (num_matches >= max_matches)
>       return num_matches;
> 
> -    decls.push_back(named_decl);
> +    decls.push_back(CompilerDecl(m_ast_context.get(), named_decl));
>     ++num_matches;
>   }
> 
> 
> diff  --git a/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCDeclVendor.cpp b/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCDeclVendor.cpp
> index 54f8397e1dad..29930c303b07 100644
> --- a/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCDeclVendor.cpp
> +++ b/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCDeclVendor.cpp
> @@ -537,10 +537,9 @@ bool AppleObjCDeclVendor::FinishDecl(clang::ObjCInterfaceDecl *interface_decl) {
>   return true;
> }
> 
> -uint32_t
> -AppleObjCDeclVendor::FindDecls(ConstString name, bool append,
> -                               uint32_t max_matches,
> -                               std::vector<clang::NamedDecl *> &decls) {
> +uint32_t AppleObjCDeclVendor::FindDecls(ConstString name, bool append,
> +                                        uint32_t max_matches,
> +                                        std::vector<CompilerDecl> &decls) {
>   static unsigned int invocation_id = 0;
>   unsigned int current_id = invocation_id++;
> 
> @@ -587,7 +586,7 @@ AppleObjCDeclVendor::FindDecls(ConstString name, bool append,
>                    current_id, result_iface_type.getAsString(), isa_value);
>         }
> 
> -        decls.push_back(result_iface_decl);
> +        decls.push_back(CompilerDecl(&m_ast_ctx, result_iface_decl));
>         ret++;
>         break;
>       } else {
> @@ -630,7 +629,7 @@ AppleObjCDeclVendor::FindDecls(ConstString name, bool append,
>                new_iface_type.getAsString(), (uint64_t)isa);
>     }
> 
> -    decls.push_back(iface_decl);
> +    decls.push_back(CompilerDecl(&m_ast_ctx, iface_decl));
>     ret++;
>     break;
>   } while (false);
> 
> diff  --git a/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCDeclVendor.h b/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCDeclVendor.h
> index 311113a27735..f49ca3540c2c 100644
> --- a/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCDeclVendor.h
> +++ b/lldb/source/Plugins/LanguageRuntime/ObjC/AppleObjCRuntime/AppleObjCDeclVendor.h
> @@ -28,7 +28,7 @@ class AppleObjCDeclVendor : public ClangDeclVendor {
>   }
> 
>   uint32_t FindDecls(ConstString name, bool append, uint32_t max_matches,
> -                     std::vector<clang::NamedDecl *> &decls) override;
> +                     std::vector<CompilerDecl> &decls) override;
> 
>   friend class AppleObjCExternalASTSource;
> 
> 
> 
> 
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