From 513a9547f50bda29d4795fc8869ce80c120d8387 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Mon, 14 Nov 2005 07:00:29 +0000
Subject: [PATCH] Teach -track-memory to work on darwin.  Looking at sbrk
 doesn't work because the default allocator uses mmap.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24349 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/System/Unix/Process.inc | 22 ++++++++++++----------
 1 file changed, 12 insertions(+), 10 deletions(-)

diff --git a/lib/System/Unix/Process.inc b/lib/System/Unix/Process.inc
index e5a93786aa4..f73444f0c05 100644
--- a/lib/System/Unix/Process.inc
+++ b/lib/System/Unix/Process.inc
@@ -21,6 +21,9 @@
 #ifdef HAVE_MALLOC_H
 #include <malloc.h>
 #endif
+#ifdef HAVE_MALLOC_MALLOC_H
+#include <malloc/malloc.h>
+#endif
 
 //===----------------------------------------------------------------------===//
 //=== WARNING: Implementation here must contain only generic UNIX code that
@@ -43,23 +46,20 @@ Process::GetPageSize()
   return static_cast<unsigned>(page_size);
 }
 
-#if defined(HAVE_SBRK)
-static char* som = reinterpret_cast<char*>(::sbrk(0));
-#endif
-
-size_t 
-Process::GetMallocUsage()
-{
+size_t Process::GetMallocUsage() {
 #if defined(HAVE_MALLINFO)
   struct mallinfo mi;
   mi = ::mallinfo();
   return mi.uordblks;
+#elif defined(HAVE_MSTATS) && defined(HAVE_MALLOC_MALLOC_H)
+  return mstats().bytes_used;   // darwin
 #elif defined(HAVE_SBRK)
   // Note this is only an approximation and more closely resembles
   // the value returned by mallinfo in the arena field.
-  char * eom = (char*) sbrk(0);
-  if (eom != ((char*)-1) && som != ((char*)-1))
-    return eom - som;
+  static char *StartOfMemory = reinterpret_cast<char*>(::sbrk(0));
+  char *EndOfMemory = (char*)sbrk(0);
+  if (EndOfMemory != ((char*)-1) && StartOfMemory != ((char*)-1))
+    return EndOfMemory - StartOfMemory;
   else
     return 0;
 #else
@@ -74,6 +74,8 @@ Process::GetTotalMemoryUsage()
 #if defined(HAVE_MALLINFO)
   struct mallinfo mi = ::mallinfo();
   return mi.uordblks + mi.hblkhd;
+#elif defined(HAVE_MSTATS) && defined(HAVE_MALLOC_MALLOC_H)
+  return mstats().bytes_total;   // darwin
 #elif defined(HAVE_GETRUSAGE)
   struct rusage usage;
   ::getrusage(RUSAGE_SELF, &usage);