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      1 //===-- SectionLoadList.h -----------------------------------------------*- C++ -*-===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 #ifndef liblldb_SectionLoadList_h_
     11 #define liblldb_SectionLoadList_h_
     12 
     13 // C Includes
     14 // C++ Includes
     15 #include <map>
     16 
     17 // Other libraries and framework includes
     18 #include "llvm/ADT/DenseMap.h"
     19 // Project includes
     20 #include "lldb/lldb-public.h"
     21 #include "lldb/Host/Mutex.h"
     22 
     23 namespace lldb_private {
     24 
     25 class SectionLoadList
     26 {
     27 public:
     28     //------------------------------------------------------------------
     29     // Constructors and Destructors
     30     //------------------------------------------------------------------
     31     SectionLoadList () :
     32         m_addr_to_sect (),
     33         m_sect_to_addr (),
     34         m_mutex (Mutex::eMutexTypeRecursive)
     35 
     36     {
     37     }
     38 
     39     ~SectionLoadList()
     40     {
     41         // Call clear since this takes a lock and clears the section load list
     42         // in case another thread is currently using this section load list
     43         Clear();
     44     }
     45 
     46     bool
     47     IsEmpty() const;
     48 
     49     void
     50     Clear ();
     51 
     52     lldb::addr_t
     53     GetSectionLoadAddress (const lldb::SectionSP &section_sp) const;
     54 
     55     bool
     56     ResolveLoadAddress (lldb::addr_t load_addr, Address &so_addr) const;
     57 
     58     bool
     59     SetSectionLoadAddress (const lldb::SectionSP &section_sp, lldb::addr_t load_addr, bool warn_multiple = false);
     60 
     61     // The old load address should be specified when unloading to ensure we get
     62     // the correct instance of the section as a shared library could be loaded
     63     // at more than one location.
     64     bool
     65     SetSectionUnloaded (const lldb::SectionSP &section_sp, lldb::addr_t load_addr);
     66 
     67     // Unload all instances of a section. This function can be used on systems
     68     // that don't support multiple copies of the same shared library to be
     69     // loaded at the same time.
     70     size_t
     71     SetSectionUnloaded (const lldb::SectionSP &section_sp);
     72 
     73     void
     74     Dump (Stream &s, Target *target);
     75 
     76 protected:
     77     typedef std::map<lldb::addr_t, lldb::SectionSP> addr_to_sect_collection;
     78     typedef llvm::DenseMap<const Section *, lldb::addr_t> sect_to_addr_collection;
     79     addr_to_sect_collection m_addr_to_sect;
     80     sect_to_addr_collection m_sect_to_addr;
     81     mutable Mutex m_mutex;
     82 
     83 private:
     84     DISALLOW_COPY_AND_ASSIGN (SectionLoadList);
     85 };
     86 
     87 } // namespace lldb_private
     88 
     89 #endif  // liblldb_SectionLoadList_h_
     90