src/libcompiler_builtins/compiler-rt/lib/sanitizer_common/sanitizer_procmaps.h

   1 //===-- sanitizer_procmaps.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 // This file is shared between AddressSanitizer and ThreadSanitizer.
  11 //
  12 // Information about the process mappings.
  13 //===----------------------------------------------------------------------===//
  14 #ifndef SANITIZER_PROCMAPS_H
  15 #define SANITIZER_PROCMAPS_H
  16
  17 #include "sanitizer_platform.h"
  18
  19 #if SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD || \
  20     SANITIZER_MAC || SANITIZER_SOLARIS
  21
  22 #include "sanitizer_common.h"
  23 #include "sanitizer_internal_defs.h"
  24 #include "sanitizer_linux.h"
  25 #include "sanitizer_mac.h"
  26 #include "sanitizer_mutex.h"
  27
  28 namespace __sanitizer {
  29
  30
  31 // Memory protection masks.
  32 static const uptr kProtectionRead = 1;
  33 static const uptr kProtectionWrite = 2;
  34 static const uptr kProtectionExecute = 4;
  35 static const uptr kProtectionShared = 8;
  36
  37 struct MemoryMappedSegmentData;
  38
  39 class MemoryMappedSegment {
  40  public:
  41   MemoryMappedSegment(char *buff = nullptr, uptr size = 0)
  42       : filename(buff), filename_size(size), data_(nullptr) {}
  43   ~MemoryMappedSegment() {}
  44
  45   bool IsReadable() const { return protection & kProtectionRead; }
  46   bool IsWritable() const { return protection & kProtectionWrite; }
  47   bool IsExecutable() const { return protection & kProtectionExecute; }
  48   bool IsShared() const { return protection & kProtectionShared; }
  49
  50   void AddAddressRanges(LoadedModule *module);
  51
  52   uptr start;
  53   uptr end;
  54   uptr offset;
  55   char *filename;  // owned by caller
  56   uptr filename_size;
  57   uptr protection;
  58   ModuleArch arch;
  59   u8 uuid[kModuleUUIDSize];
  60
  61  private:
  62   friend class MemoryMappingLayout;
  63
  64   // This field is assigned and owned by MemoryMappingLayout if needed
  65   MemoryMappedSegmentData *data_;
  66 };
  67
  68 class MemoryMappingLayout {
  69  public:
  70   explicit MemoryMappingLayout(bool cache_enabled);
  71   ~MemoryMappingLayout();
  72   bool Next(MemoryMappedSegment *segment);
  73   void Reset();
  74   // In some cases, e.g. when running under a sandbox on Linux, ASan is unable
  75   // to obtain the memory mappings. It should fall back to pre-cached data
  76   // instead of aborting.
  77   static void CacheMemoryMappings();
  78
  79   // Adds all mapped objects into a vector.
  80   void DumpListOfModules(InternalMmapVectorNoCtor<LoadedModule> *modules);
  81
  82  private:
  83   void LoadFromCache();
  84
  85   MemoryMappingLayoutData data_;
  86 };
  87
  88 // Returns code range for the specified module.
  89 bool GetCodeRangeForFile(const char *module, uptr *start, uptr *end);
  90
  91 bool IsDecimal(char c);
  92 uptr ParseDecimal(const char **p);
  93 bool IsHex(char c);
  94 uptr ParseHex(const char **p);
  95
  96 }  // namespace __sanitizer
  97
  98 #endif  // SANITIZER_LINUX || SANITIZER_FREEBSD || SANITIZER_NETBSD ||
  99         // SANITIZER_MAC || SANITIZER_SOLARIS
 100 #endif  // SANITIZER_PROCMAPS_H