[msan] Remove dead function/fields

[stephan.yichao.zhao]

Summary

To see how to extract a shared allocator interface for D101204,
found some unused code. Tests passed. Are they safe to remove?

[vitalybuka]

Can you please remove the one from MemprofThreadLocalMallocStorage as well

[stephan.yichao.zhao]

changed MemprofThreadLocalMallocStorage

compiler-rt/lib/memprof/memprof_allocator.h

 
 template <typename AddressSpaceView>
 using MemprofAllocatorASVT =
     CombinedAllocator<PrimaryAllocatorASVT<AddressSpaceView>>;
 using MemprofAllocator = MemprofAllocatorASVT<LocalAddressSpaceView>;
 using AllocatorCache = MemprofAllocator::AllocatorCache;
 
 struct MemprofThreadLocalMallocStorage {
-  uptr quarantine_cache[16];
   AllocatorCache allocator_cache;
   void CommitBack();
 
 private:
   // These objects are allocated via mmap() and are zero-initialized.
   MemprofThreadLocalMallocStorage() {}
 };
 

compiler-rt/lib/msan/msan.h

 extern int msan_report_count;
 
 bool ProtectRange(uptr beg, uptr end);
 bool InitShadow(bool init_origins);
 char *GetProcSelfMaps();
 void InitializeInterceptors();
 
 void MsanAllocatorInit();
-void MsanAllocatorThreadFinish();
 void MsanDeallocate(StackTrace *stack, void *ptr);
 
 void *msan_malloc(uptr size, StackTrace *stack);
 void *msan_calloc(uptr nmemb, uptr size, StackTrace *stack);
 void *msan_realloc(void *ptr, uptr size, StackTrace *stack);
 void *msan_reallocarray(void *ptr, uptr nmemb, uptr size, StackTrace *stack);
 void *msan_valloc(uptr size, StackTrace *stack);
 void *msan_pvalloc(uptr size, StackTrace *stack);

compiler-rt/lib/msan/msan_allocator.h

 #ifndef MSAN_ALLOCATOR_H
 #define MSAN_ALLOCATOR_H
 
 #include "sanitizer_common/sanitizer_common.h"
 
 namespace __msan {
 
 struct MsanThreadLocalMallocStorage {
-  uptr quarantine_cache[16];
   // Allocator cache contains atomic_uint64_t which must be 8-byte aligned.
   ALIGNED(8) uptr allocator_cache[96 * (512 * 8 + 16)];  // Opaque.
   void CommitBack();
 
  private:
   // These objects are allocated via mmap() and are zero-initialized.
   MsanThreadLocalMallocStorage() {}
 };
 
 } // namespace __msan
 #endif // MSAN_ALLOCATOR_H