[LSan] Adjust LSan allocator limits for PPC64.

[alekseyshl]

Summary

Now the limits are the same as for ASan allocator.

[cryptoad]

I don't know the PPC address space so I can't comment on the values themselves. But the form looks good.

[alekseyshl]

In D39309#907306, @cryptoad wrote:

I don't know the PPC address space so I can't comment on the values themselves. But the form looks good.

They are the same as ASan uses on PPC64.

compiler-rt/trunk/lib/lsan/lsan_allocator.h

struct AP32 {
   typedef __sanitizer::CompactSizeClassMap SizeClassMap;
   static const uptr kRegionSizeLog = __lsan::kRegionSizeLog;
   typedef __lsan::ByteMap ByteMap;
   typedef NoOpMapUnmapCallback MapUnmapCallback;
   static const uptr kFlags = 0;
 };
 typedef SizeClassAllocator32<AP32> PrimaryAllocator;
 #elif defined(__x86_64__) || defined(__powerpc64__)
+# if defined(__powerpc64__)
+const uptr kAllocatorSpace = 0xa0000000000ULL;
+const uptr kAllocatorSize  = 0x20000000000ULL;  // 2T.
+# else
+const uptr kAllocatorSpace = 0x600000000000ULL;
+const uptr kAllocatorSize  = 0x40000000000ULL;  // 4T.
+# endif
 struct AP64 {  // Allocator64 parameters. Deliberately using a short name.
-  static const uptr kSpaceBeg = 0x600000000000ULL;
-  static const uptr kSpaceSize =  0x40000000000ULL; // 4T.
+  static const uptr kSpaceBeg = kAllocatorSpace;
+  static const uptr kSpaceSize = kAllocatorSize;
   static const uptr kMetadataSize = sizeof(ChunkMetadata);
   typedef DefaultSizeClassMap SizeClassMap;
   typedef NoOpMapUnmapCallback MapUnmapCallback;
   static const uptr kFlags = 0;
 };
 
 typedef SizeClassAllocator64<AP64> PrimaryAllocator;
 #endif