clang  14.0.0git
DataCollection.cpp
Go to the documentation of this file.
1 //===-- DataCollection.cpp --------------------------------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
11 #include "clang/Lex/Lexer.h"
12 
13 namespace clang {
14 namespace data_collection {
15 
16 /// Prints the macro name that contains the given SourceLocation into the given
17 /// raw_string_ostream.
18 static void printMacroName(llvm::raw_string_ostream &MacroStack,
19  ASTContext &Context, SourceLocation Loc) {
20  MacroStack << Lexer::getImmediateMacroName(Loc, Context.getSourceManager(),
21  Context.getLangOpts());
22 
23  // Add an empty space at the end as a padding to prevent
24  // that macro names concatenate to the names of other macros.
25  MacroStack << " ";
26 }
27 
28 /// Returns a string that represents all macro expansions that expanded into the
29 /// given SourceLocation.
30 ///
31 /// If 'getMacroStack(A) == getMacroStack(B)' is true, then the SourceLocations
32 /// A and B are expanded from the same macros in the same order.
34  std::string MacroStack;
35  llvm::raw_string_ostream MacroStackStream(MacroStack);
36  SourceManager &SM = Context.getSourceManager();
37 
38  // Iterate over all macros that expanded into the given SourceLocation.
39  while (Loc.isMacroID()) {
40  // Add the macro name to the stream.
41  printMacroName(MacroStackStream, Context, Loc);
42  Loc = SM.getImmediateMacroCallerLoc(Loc);
43  }
44  MacroStackStream.flush();
45  return MacroStack;
46 }
47 
48 } // end namespace data_collection
49 } // end namespace clang
string
string(SUBSTRING ${CMAKE_CURRENT_BINARY_DIR} 0 ${PATH_LIB_START} PATH_HEAD) string(SUBSTRING $
Definition: CMakeLists.txt:22
clang::SourceLocation
Encodes a location in the source.
Definition: SourceLocation.h:88
clang::data_collection::getMacroStack
std::string getMacroStack(SourceLocation Loc, ASTContext &Context)
Returns a string that represents all macro expansions that expanded into the given SourceLocation.
Definition: DataCollection.cpp:33
SourceManager.h
clang::SourceManager
This class handles loading and caching of source files into memory.
Definition: SourceManager.h:626
clang::ASTContext
Holds long-lived AST nodes (such as types and decls) that can be referred to throughout the semantic ...
Definition: ASTContext.h:212
clang::data_collection::printMacroName
static void printMacroName(llvm::raw_string_ostream &MacroStack, ASTContext &Context, SourceLocation Loc)
Prints the macro name that contains the given SourceLocation into the given raw_string_ostream.
Definition: DataCollection.cpp:18
clang::Lexer::getImmediateMacroName
static StringRef getImmediateMacroName(SourceLocation Loc, const SourceManager &SM, const LangOptions &LangOpts)
Retrieve the name of the immediate macro expansion.
Definition: Lexer.cpp:993
Lexer.h
DataCollection.h
clang::SourceLocation::isMacroID
bool isMacroID() const
Definition: SourceLocation.h:105
clang
Definition: CalledOnceCheck.h:17
SM
#define SM(sm)
Definition: Cuda.cpp:78