[compiler-rt] df3af58 - tsan: increase app mappings for aarch64 48-bit

[Thurston Dang via llvm-commits]

Author: Thurston Dang
Date: 2023-01-09T18:45:43Z
New Revision: df3af581e711116ac6d9473251f346d335e97e53

URL: https://github.com/llvm/llvm-project/commit/df3af581e711116ac6d9473251f346d335e97e53
DIFF: https://github.com/llvm/llvm-project/commit/df3af581e711116ac6d9473251f346d335e97e53.diff

LOG: tsan: increase app mappings for aarch64 48-bit

Currently, tsan's memory mappings include 4GB
for high app, 20GB for mid app, and 8GB for low
app. The high app and mid app mappings are
too small for large programs, especially if ASLR
entropy (mmap_rnd_bits) is set higher. The low app
region (for non-PIE) is too small for some of tcmalloc's
internal tests (this does not affect normal apps,
since tsan will replace malloc).

This CL increases the memory mappings to 4TB for
high app, 1.3TB for mid app, and 10TB for low app. Note
that tsan's 44-bit pointer compression/decompression imposes
a 16TB limit on the combined size of the app mappings, making
this set of mappings more or less maximal.

Differential Revision: https://reviews.llvm.org/D140923

Added: 
    

Modified: 
    compiler-rt/lib/tsan/rtl/tsan_platform.h

Removed: 
    


################################################################################
diff  --git a/compiler-rt/lib/tsan/rtl/tsan_platform.h b/compiler-rt/lib/tsan/rtl/tsan_platform.h
index cad99f1a0bd26..2d9cc883855c7 100644
--- a/compiler-rt/lib/tsan/rtl/tsan_platform.h
+++ b/compiler-rt/lib/tsan/rtl/tsan_platform.h
@@ -212,20 +212,20 @@ struct MappingAarch64_42 {
 
 struct MappingAarch64_48 {
   static const uptr kLoAppMemBeg   = 0x0000000001000ull;
-  static const uptr kLoAppMemEnd   = 0x0000200000000ull;
-  static const uptr kShadowBeg = 0x0001000000000ull;
-  static const uptr kShadowEnd = 0x0002000000000ull;
-  static const uptr kMetaShadowBeg = 0x0005000000000ull;
-  static const uptr kMetaShadowEnd = 0x0006000000000ull;
+  static const uptr kLoAppMemEnd   = 0x00a0000000000ull;
+  static const uptr kShadowBeg     = 0x0155400000000ull;
+  static const uptr kShadowEnd     = 0x0540000000000ull;
+  static const uptr kMetaShadowBeg = 0x0800000000000ull;
+  static const uptr kMetaShadowEnd = 0x0a00000000000ull;
   static const uptr kMidAppMemBeg  = 0x0aaaa00000000ull;
-  static const uptr kMidAppMemEnd = 0x0aaaf00000000ull;
-  static const uptr kHeapMemBeg    = 0x0ffff00000000ull;
-  static const uptr kHeapMemEnd    = 0x0ffff00000000ull;
-  static const uptr kHiAppMemBeg   = 0x0ffff00000000ull;
+  static const uptr kMidAppMemEnd  = 0x0ac0000000000ull;
+  static const uptr kHiAppMemBeg   = 0x0fc0000000000ull;
   static const uptr kHiAppMemEnd   = 0x1000000000000ull;
-  static const uptr kShadowMsk = 0x0fff800000000ull;
-  static const uptr kShadowXor = 0x0000800000000ull;
-  static const uptr kShadowAdd = 0x0000000000000ull;
+  static const uptr kHeapMemBeg    = 0x0fc0000000000ull;
+  static const uptr kHeapMemEnd    = 0x0fc0000000000ull;
+  static const uptr kShadowMsk     = 0x0c00000000000ull;
+  static const uptr kShadowXor     = 0x0200000000000ull;
+  static const uptr kShadowAdd     = 0x0000000000000ull;
   static const uptr kVdsoBeg       = 0xffff000000000ull;
 };