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