contrib/llvm/tools/lldb/include/lldb/Target/SectionLoadList.h

   1 //===-- SectionLoadList.h -----------------------------------------------*- C++
   2 //-*-===//
   3 //
   4 //                     The LLVM Compiler Infrastructure
   5 //
   6 // This file is distributed under the University of Illinois Open Source
   7 // License. See LICENSE.TXT for details.
   8 //
   9 //===----------------------------------------------------------------------===//
  10
  11 #ifndef liblldb_SectionLoadList_h_
  12 #define liblldb_SectionLoadList_h_
  13
  14 // C Includes
  15 // C++ Includes
  16 #include <map>
  17 #include <mutex>
  18
  19 // Other libraries and framework includes
  20 #include "llvm/ADT/DenseMap.h"
  21 // Project includes
  22 #include "lldb/Core/Section.h"
  23 #include "lldb/lldb-public.h"
  24
  25 namespace lldb_private {
  26
  27 class SectionLoadList {
  28 public:
  29   //------------------------------------------------------------------
  30   // Constructors and Destructors
  31   //------------------------------------------------------------------
  32   SectionLoadList() : m_addr_to_sect(), m_sect_to_addr(), m_mutex() {}
  33
  34   SectionLoadList(const SectionLoadList &rhs);
  35
  36   ~SectionLoadList() {
  37     // Call clear since this takes a lock and clears the section load list in
  38     // case another thread is currently using this section load list
  39     Clear();
  40   }
  41
  42   void operator=(const SectionLoadList &rhs);
  43
  44   bool IsEmpty() const;
  45
  46   void Clear();
  47
  48   lldb::addr_t GetSectionLoadAddress(const lldb::SectionSP &section_sp) const;
  49
  50   bool ResolveLoadAddress(lldb::addr_t load_addr, Address &so_addr,
  51                           bool allow_section_end = false) const;
  52
  53   bool SetSectionLoadAddress(const lldb::SectionSP &section_sp,
  54                              lldb::addr_t load_addr,
  55                              bool warn_multiple = false);
  56
  57   // The old load address should be specified when unloading to ensure we get
  58   // the correct instance of the section as a shared library could be loaded at
  59   // more than one location.
  60   bool SetSectionUnloaded(const lldb::SectionSP &section_sp,
  61                           lldb::addr_t load_addr);
  62
  63   // Unload all instances of a section. This function can be used on systems
  64   // that don't support multiple copies of the same shared library to be loaded
  65   // at the same time.
  66   size_t SetSectionUnloaded(const lldb::SectionSP &section_sp);
  67
  68   void Dump(Stream &s, Target *target);
  69
  70 protected:
  71   typedef std::map<lldb::addr_t, lldb::SectionSP> addr_to_sect_collection;
  72   typedef llvm::DenseMap<const Section *, lldb::addr_t> sect_to_addr_collection;
  73   addr_to_sect_collection m_addr_to_sect;
  74   sect_to_addr_collection m_sect_to_addr;
  75   mutable std::recursive_mutex m_mutex;
  76 };
  77
  78 } // namespace lldb_private
  79
  80 #endif // liblldb_SectionLoadList_h_