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      1 //===-- msan.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 a part of MemorySanitizer.
     11 //
     12 // Private MSan header.
     13 //===----------------------------------------------------------------------===//
     14 
     15 #ifndef MSAN_H
     16 #define MSAN_H
     17 
     18 #include "sanitizer_common/sanitizer_flags.h"
     19 #include "sanitizer_common/sanitizer_internal_defs.h"
     20 #include "sanitizer_common/sanitizer_stacktrace.h"
     21 #include "msan_interface_internal.h"
     22 #include "msan_flags.h"
     23 
     24 #ifndef MSAN_REPLACE_OPERATORS_NEW_AND_DELETE
     25 # define MSAN_REPLACE_OPERATORS_NEW_AND_DELETE 1
     26 #endif
     27 
     28 #define MEM_TO_SHADOW(mem) (((uptr)mem)       & ~0x400000000000ULL)
     29 #define MEM_TO_ORIGIN(mem) (MEM_TO_SHADOW(mem) + 0x200000000000ULL)
     30 #define MEM_IS_APP(mem)    ((uptr)mem >=         0x600000000000ULL)
     31 #define MEM_IS_SHADOW(mem) ((uptr)mem >=         0x200000000000ULL && \
     32                             (uptr)mem <=         0x400000000000ULL)
     33 
     34 const int kMsanParamTlsSizeInWords = 100;
     35 const int kMsanRetvalTlsSizeInWords = 100;
     36 
     37 namespace __msan {
     38 extern int msan_inited;
     39 extern bool msan_init_is_running;
     40 extern int msan_report_count;
     41 
     42 bool ProtectRange(uptr beg, uptr end);
     43 bool InitShadow(bool prot1, bool prot2, bool map_shadow, bool init_origins);
     44 char *GetProcSelfMaps();
     45 void InitializeInterceptors();
     46 
     47 void *MsanReallocate(StackTrace *stack, void *oldp, uptr size,
     48                      uptr alignment, bool zeroise);
     49 void MsanDeallocate(void *ptr);
     50 void InstallTrapHandler();
     51 void InstallAtExitHandler();
     52 void ReplaceOperatorsNewAndDelete();
     53 
     54 void EnterSymbolizer();
     55 void ExitSymbolizer();
     56 bool IsInSymbolizer();
     57 
     58 struct SymbolizerScope {
     59   SymbolizerScope() { EnterSymbolizer(); }
     60   ~SymbolizerScope() { ExitSymbolizer(); }
     61 };
     62 
     63 void EnterLoader();
     64 void ExitLoader();
     65 
     66 void MsanDie();
     67 void PrintWarning(uptr pc, uptr bp);
     68 void PrintWarningWithOrigin(uptr pc, uptr bp, u32 origin);
     69 
     70 void GetStackTrace(StackTrace *stack, uptr max_s, uptr pc, uptr bp,
     71                    bool fast);
     72 
     73 void ReportUMR(StackTrace *stack, u32 origin);
     74 void ReportExpectedUMRNotFound(StackTrace *stack);
     75 void ReportAtExitStatistics();
     76 
     77 // Unpoison first n function arguments.
     78 void UnpoisonParam(uptr n);
     79 
     80 #define GET_MALLOC_STACK_TRACE                                     \
     81   StackTrace stack;                                                \
     82   stack.size = 0;                                                  \
     83   if (__msan_get_track_origins() && msan_inited)                   \
     84     GetStackTrace(&stack, common_flags()->malloc_context_size,     \
     85         StackTrace::GetCurrentPc(), GET_CURRENT_FRAME(),           \
     86         common_flags()->fast_unwind_on_malloc)
     87 
     88 }  // namespace __msan
     89 
     90 #define MSAN_MALLOC_HOOK(ptr, size) \
     91   if (&__msan_malloc_hook) __msan_malloc_hook(ptr, size)
     92 #define MSAN_FREE_HOOK(ptr) \
     93   if (&__msan_free_hook) __msan_free_hook(ptr)
     94 
     95 #endif  // MSAN_H
     96