/usr/lib/llvm-3.4/include/lldb/Expression/ASTStructExtractor.h is in liblldb-3.4-dev 1:3.4.2-13.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 | //===-- ASTStructExtractor.h ------------------------------------*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef liblldb_ASTStructExtractor_h_
#define liblldb_ASTStructExtractor_h_
#include "clang/Sema/SemaConsumer.h"
#include "lldb/Core/ClangForward.h"
#include "lldb/Expression/ClangExpressionVariable.h"
#include "lldb/Expression/ClangFunction.h"
namespace lldb_private {
//----------------------------------------------------------------------
/// @class ASTStructExtractor ASTStructExtractor.h "lldb/Expression/ASTStructExtractor.h"
/// @brief Extracts and describes the argument structure for a wrapped function.
///
/// This pass integrates with ClangFunction, which calls functions with custom
/// sets of arguments. To avoid having to implement the full calling convention
/// for the target's architecture, ClangFunction writes a simple wrapper
/// function that takes a pointer to an argument structure that contains room
/// for the address of the function to be called, the values of all its
/// arguments, and room for the function's return value.
///
/// The definition of this struct is itself in the body of the wrapper function,
/// so Clang does the structure layout itself. ASTStructExtractor reads through
/// the AST for the wrapper funtion and finds the struct.
//----------------------------------------------------------------------
class ASTStructExtractor : public clang::SemaConsumer
{
public:
//----------------------------------------------------------------------
/// Constructor
///
/// @param[in] passthrough
/// Since the ASTs must typically go through to the Clang code generator
/// in order to produce LLVM IR, this SemaConsumer must allow them to
/// pass to the next step in the chain after processing. Passthrough is
/// the next ASTConsumer, or NULL if none is required.
///
/// @param[in] struct_name
/// The name of the structure to extract from the wrapper function.
///
/// @param[in] function
/// The caller object whose members should be populated with information
/// about the argument struct. ClangFunction friends ASTStructExtractor
/// for this purpose.
//----------------------------------------------------------------------
ASTStructExtractor(clang::ASTConsumer *passthrough,
const char *struct_name,
ClangFunction &function);
//----------------------------------------------------------------------
/// Destructor
//----------------------------------------------------------------------
virtual ~ASTStructExtractor();
//----------------------------------------------------------------------
/// Link this consumer with a particular AST context
///
/// @param[in] Context
/// This AST context will be used for types and identifiers, and also
/// forwarded to the passthrough consumer, if one exists.
//----------------------------------------------------------------------
void Initialize(clang::ASTContext &Context);
//----------------------------------------------------------------------
/// Examine a list of Decls to find the function $__lldb_expr and
/// transform its code
///
/// @param[in] D
/// The list of Decls to search. These may contain LinkageSpecDecls,
/// which need to be searched recursively. That job falls to
/// TransformTopLevelDecl.
//----------------------------------------------------------------------
bool HandleTopLevelDecl(clang::DeclGroupRef D);
//----------------------------------------------------------------------
/// Passthrough stub
//----------------------------------------------------------------------
void HandleTranslationUnit(clang::ASTContext &Ctx);
//----------------------------------------------------------------------
/// Passthrough stub
//----------------------------------------------------------------------
void HandleTagDeclDefinition(clang::TagDecl *D);
//----------------------------------------------------------------------
/// Passthrough stub
//----------------------------------------------------------------------
void CompleteTentativeDefinition(clang::VarDecl *D);
//----------------------------------------------------------------------
/// Passthrough stub
//----------------------------------------------------------------------
void HandleVTable(clang::CXXRecordDecl *RD, bool DefinitionRequired);
//----------------------------------------------------------------------
/// Passthrough stub
//----------------------------------------------------------------------
void PrintStats();
//----------------------------------------------------------------------
/// Set the Sema object to use when performing transforms, and pass it on
///
/// @param[in] S
/// The Sema to use. Because Sema isn't externally visible, this class
/// casts it to an Action for actual use.
//----------------------------------------------------------------------
void InitializeSema(clang::Sema &S);
//----------------------------------------------------------------------
/// Reset the Sema to NULL now that transformations are done
//----------------------------------------------------------------------
void ForgetSema();
private:
//----------------------------------------------------------------------
/// Hunt the given FunctionDecl for the argument struct and place
/// information about it into m_function
///
/// @param[in] F
/// The FunctionDecl to hunt.
//----------------------------------------------------------------------
void
ExtractFromFunctionDecl(clang::FunctionDecl* F);
//----------------------------------------------------------------------
/// Hunt the given Decl for FunctionDecls named the same as the wrapper
/// function name, recursing as necessary through LinkageSpecDecls, and
/// calling ExtractFromFunctionDecl on anything that was found
///
/// @param[in] D
/// The Decl to hunt.
//----------------------------------------------------------------------
void
ExtractFromTopLevelDecl(clang::Decl* D);
clang::ASTContext *m_ast_context; ///< The AST context to use for identifiers and types.
clang::ASTConsumer *m_passthrough; ///< The ASTConsumer down the chain, for passthrough. NULL if it's a SemaConsumer.
clang::SemaConsumer *m_passthrough_sema; ///< The SemaConsumer down the chain, for passthrough. NULL if it's an ASTConsumer.
clang::Sema *m_sema; ///< The Sema to use.
clang::Action *m_action; ///< The Sema to use, cast to an Action so it's usable.
ClangFunction &m_function; ///< The function to populate with information about the argument structure.
std::string m_struct_name; ///< The name of the structure to extract.
};
}
#endif
|