[PATCH] D65775: [Sanitizer] Linux explicitally migrate shadow mapping to Transparent Huge Page

[David CARLIER via Phabricator via llvm-commits]

devnexen updated this revision to Diff 213702.

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D65775/new/

https://reviews.llvm.org/D65775

Files:
  compiler-rt/lib/sanitizer_common/sanitizer_common.h
  compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp
  compiler-rt/lib/sanitizer_common/sanitizer_win.cpp
  compiler-rt/lib/tsan/rtl/tsan_platform_posix.cpp


Index: compiler-rt/lib/tsan/rtl/tsan_platform_posix.cpp
===================================================================
--- compiler-rt/lib/tsan/rtl/tsan_platform_posix.cpp
+++ compiler-rt/lib/tsan/rtl/tsan_platform_posix.cpp
@@ -30,13 +30,7 @@
     "TSAN_OPTIONS=%s=0\n";
 
 static void NoHugePagesInShadow(uptr addr, uptr size) {
-  if (!SetShadowRegionHugePageMode(addr, size)) {
-    Printf(kShadowMemoryMappingWarning, SanitizerToolName, addr, addr + size,
-        "MADV_NOHUGEPAGE", errno);
-    Printf(kShadowMemoryMappingHint, "MADV_NOHUGEPAGE",
-        "no_huge_pages_for_shadow");
-    Die();
-  }
+  SetShadowRegionHugePageMode(addr, size);
 }
 
 static void DontDumpShadow(uptr addr, uptr size) {
Index: compiler-rt/lib/sanitizer_common/sanitizer_win.cpp
===================================================================
--- compiler-rt/lib/sanitizer_common/sanitizer_win.cpp
+++ compiler-rt/lib/sanitizer_common/sanitizer_win.cpp
@@ -329,9 +329,8 @@
   // FIXME: add madvise-analog when we move to 64-bits.
 }
 
-bool SetShadowRegionHugePageMode(uptr addr, uptr size) {
+void SetShadowRegionHugePageMode(uptr addr, uptr size) {
   // FIXME: probably similar to ReleaseMemoryToOS.
-  return true;
 }
 
 bool DontDumpShadowMemory(uptr addr, uptr length) {
Index: compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp
===================================================================
--- compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp
+++ compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp
@@ -68,13 +68,12 @@
             SANITIZER_MADVISE_DONTNEED);
 }
 
-bool SetShadowRegionHugePageMode(uptr addr, uptr size) {
+void SetShadowRegionHugePageMode(uptr addr, uptr size) {
 #ifdef MADV_NOHUGEPAGE  // May not be defined on old systems.
   if (common_flags()->no_huge_pages_for_shadow)
-    return madvise((char *)addr, size, MADV_NOHUGEPAGE) == 0;
-  return true;
-#else
-  return true;
+    madvise((char *)addr, size, MADV_NOHUGEPAGE);
+  else
+    madvise((char *)addr, size, MADV_HUGEPAGE) == 0;
 #endif  // MADV_NOHUGEPAGE
 }
 
Index: compiler-rt/lib/sanitizer_common/sanitizer_common.h
===================================================================
--- compiler-rt/lib/sanitizer_common/sanitizer_common.h
+++ compiler-rt/lib/sanitizer_common/sanitizer_common.h
@@ -131,7 +131,7 @@
 void IncreaseTotalMmap(uptr size);
 void DecreaseTotalMmap(uptr size);
 uptr GetRSS();
-bool SetShadowRegionHugePageMode(uptr addr, uptr length);
+void SetShadowRegionHugePageMode(uptr addr, uptr length);
 bool DontDumpShadowMemory(uptr addr, uptr length);
 // Check if the built VMA size matches the runtime one.
 void CheckVMASize();


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