Merge tcmalloc r111 (perftools v. 1.8) with the chromium/ branch.

third_party/tcmalloc/chromium/src/tests/system-alloc_unittest.cc

Index: third_party/tcmalloc/chromium/src/tests/system-alloc_unittest.cc
===================================================================
--- third_party/tcmalloc/chromium/src/tests/system-alloc_unittest.cc	(revision 94429)
+++ third_party/tcmalloc/chromium/src/tests/system-alloc_unittest.cc	(working copy)
@@ -40,6 +40,7 @@
 #endif
 #include <sys/types.h>
 #include <algorithm>
+#include <limits>
 #include "base/logging.h"               // for Check_GEImpl, Check_LTImpl, etc
 #include <google/malloc_extension.h>    // for MallocExtension::instance
 #include "common.h"                     // for kAddressBits
@@ -83,7 +84,6 @@
 
   void DumpStats() {
   }
-  void FlagsInitialized() {}
 
 private:
   static const int kArraySize = 8 * 1024 * 1024;
@@ -115,14 +115,30 @@
   const int kPointerBits = 8 * sizeof(void*);
   const int kImplementedVirtualBits = NumImplementedVirtualBits();
 
-  CHECK_GE(kAddressBits, min(kImplementedVirtualBits, kPointerBits));
+  CHECK_GE(kAddressBits, std::min(kImplementedVirtualBits, kPointerBits));
 }
 #endif
 
 static void TestBasicRetryFailTest() {
   // Check with the allocator still works after a failed allocation.
-  void* p = malloc(1ULL << 50);  // Asking for 1P ram
-  CHECK(p == NULL);
+  //
+  // There is no way to call malloc and guarantee it will fail.  malloc takes a
+  // size_t parameter and the C++ standard does not constrain the size of
+  // size_t.  For example, consider an implementation where size_t is 32 bits
+  // and pointers are 64 bits.
+  //
+  // It is likely, though, that sizeof(size_t) == sizeof(void*).  In that case,
+  // the first allocation here might succeed but the second allocation must
+  // fail.
+  //
+  // If the second allocation succeeds, you will have to rewrite or
+  // disable this test.
+  // The weird parens are to avoid macro-expansion of 'max' on windows.
+  const size_t kHugeSize = (std::numeric_limits<size_t>::max)() / 2;
+  void* p1 = malloc(kHugeSize);
+  void* p2 = malloc(kHugeSize);
+  CHECK(p2 == NULL);
+  if (p1 != NULL) free(p1);
 
   char* q = new char[1024];
   CHECK(q != NULL);