[PATCH] D46016: [scudo] Adding an interface function to print allocator stats

[Kostya Kortchinsky via Phabricator via llvm-commits]

cryptoad created this revision.
Herald added subscribers: Sanitizers, llvm-commits, delcypher.

This adds `__scudo_print_stats` as an interface function to display the Primary
and Secondary allocator statistics for Scudo.


Repository:
  rCRT Compiler Runtime

https://reviews.llvm.org/D46016

Files:
  include/sanitizer/scudo_interface.h
  lib/scudo/scudo_allocator.cpp
  lib/scudo/scudo_allocator_combined.h
  lib/scudo/scudo_interface_internal.h


Index: lib/scudo/scudo_interface_internal.h
===================================================================
--- lib/scudo/scudo_interface_internal.h
+++ lib/scudo/scudo_interface_internal.h
@@ -25,6 +25,9 @@
 
 SANITIZER_INTERFACE_ATTRIBUTE
 void __scudo_set_rss_limit(uptr LimitMb, s32 HardLimit);
+
+SANITIZER_INTERFACE_ATTRIBUTE
+void __scudo_print_stats();
 }  // extern "C"
 
 #endif  // SCUDO_INTERFACE_INTERNAL_H_
Index: lib/scudo/scudo_allocator_combined.h
===================================================================
--- lib/scudo/scudo_allocator_combined.h
+++ lib/scudo/scudo_allocator_combined.h
@@ -61,6 +61,11 @@
     Stats.Get(StatType);
   }
 
+  void printStats() {
+    Primary.PrintStats();
+    Secondary.PrintStats();
+  }
+
  private:
   PrimaryAllocator Primary;
   SecondaryAllocator Secondary;
Index: lib/scudo/scudo_allocator.cpp
===================================================================
--- lib/scudo/scudo_allocator.cpp
+++ lib/scudo/scudo_allocator.cpp
@@ -594,6 +594,11 @@
       SoftRssLimitMb = LimitMb;
     CheckRssLimit = HardRssLimitMb || SoftRssLimitMb;
   }
+
+  void printStats() {
+    initThreadMaybe();
+    BackendAllocator.printStats();
+  }
 };
 
 static ScudoAllocator Instance(LINKER_INITIALIZED);
@@ -743,3 +748,7 @@
     return;
   Instance.setRssLimit(LimitMb, !!HardLimit);
 }
+
+void __scudo_print_stats() {
+  Instance.printStats();
+}
Index: include/sanitizer/scudo_interface.h
===================================================================
--- include/sanitizer/scudo_interface.h
+++ include/sanitizer/scudo_interface.h
@@ -27,6 +27,8 @@
   // can be removed by setting LimitMb to 0. This function's parameters should
   // be fully trusted to avoid security mishaps.
   void __scudo_set_rss_limit(size_t LimitMb, int HardLimit);
+
+  void __scudo_print_stats(void);
 #ifdef __cplusplus
 }  // extern "C"
 #endif


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