From 38aa50bb49ac8621fe9cc6a85ad6f39a61c76bb3 Mon Sep 17 00:00:00 2001
From: Steve Reinhardt <steve.reinhardt@amd.com>
Date: Fri, 18 Mar 2011 11:47:11 -0700
Subject: base: disable FastAlloc in debug builds by default FastAlloc's reuse
 policies can mask allocation bugs, so we typically want it disabled when
 debugging.  Set FORCE_FAST_ALLOC to enable even when debugging, and set
 NO_FAST_ALLOC to disable even in non-debug builds.

---
 src/base/fast_alloc.cc | 156 +------------------------------------------------
 1 file changed, 2 insertions(+), 154 deletions(-)

(limited to 'src/base/fast_alloc.cc')

diff --git a/src/base/fast_alloc.cc b/src/base/fast_alloc.cc
index 649f94be3..0736d26e2 100644
--- a/src/base/fast_alloc.cc
+++ b/src/base/fast_alloc.cc
@@ -38,7 +38,7 @@
 
 #include "base/fast_alloc.hh"
 
-#if !NO_FAST_ALLOC
+#if USE_FAST_ALLOC
 
 #ifdef __GNUC__
 #pragma implementation
@@ -73,156 +73,4 @@ FastAlloc::moreStructs(int bucket)
     return (p + sz);
 }
 
-#if FAST_ALLOC_DEBUG
-
-#include <map>
-#include <string>
-#include <typeinfo>
-
-#include "base/cprintf.hh"
-#include "sim/core.hh"   // for curTick()
-
-using namespace std;
-
-// count of in-use FastAlloc objects
-int FastAlloc::numInUse;
-
-// dummy head & tail object for doubly linked list of in-use FastAlloc
-// objects
-FastAlloc FastAlloc::inUseHead(&FastAlloc::inUseHead, &FastAlloc::inUseHead);
-
-// special constructor for dummy head: make inUsePrev & inUseNext
-// point to self
-FastAlloc::FastAlloc(FastAlloc *prev, FastAlloc *next)
-{
-    inUsePrev = prev;
-    inUseNext = next;
-}
-
-// constructor: marks as in use, add to in-use list
-FastAlloc::FastAlloc()
-{
-    // mark this object in use
-    inUse = true;
-    whenAllocated = curTick();
-
-    // update count
-    ++numInUse;
-
-    // add to tail of list of in-use objects ("before" dummy head)
-    FastAlloc *myNext = &inUseHead;
-    FastAlloc *myPrev = inUseHead.inUsePrev;
-
-    inUsePrev = myPrev;
-    inUseNext = myNext;
-    myPrev->inUseNext = this;
-    myNext->inUsePrev = this;
-}
-
-// destructor: mark not in use, remove from in-use list
-FastAlloc::~FastAlloc()
-{
-    assert(inUse);
-    inUse = false;
-
-    --numInUse;
-    assert(numInUse >= 0);
-
-    // remove me from in-use list
-    inUsePrev->inUseNext = inUseNext;
-    inUseNext->inUsePrev = inUsePrev;
-}
-
-
-// Note that in all the display functions below we suppress anything
-// with a zero allocation timestamp... there are a bunch of static or
-// quasi-static structures that get allocated during initialization
-// and we generally don't care about them so this gets them out of the
-// way.
-
-// summarize in-use list
-void
-FastAlloc::dump_summary()
-{
-    map<string, int> typemap;
-
-    for (FastAlloc *p = inUseHead.inUseNext; p != &inUseHead; p = p->inUseNext)
-    {
-        if (p->whenAllocated != 0)
-            ++typemap[typeid(*p).name()];
-    }
-
-    map<string, int>::const_iterator mapiter;
-
-    cprintf(" count  type\n"
-            " -----  ----\n");
-    for (mapiter = typemap.begin(); mapiter != typemap.end(); ++mapiter)
-        cprintf("%6d  %s\n",mapiter->second, mapiter->first);
-}
-
-
-// show oldest n items on in-use list
-void
-FastAlloc::dump_oldest(int n)
-{
-    // sanity check: don't want to crash the debugger if you forget to
-    // pass in a parameter
-    if (n < 0 || n > numInUse) {
-        cprintf("FastAlloc::dump_oldest: bad arg %d (%d objects in use)\n",
-                n, numInUse);
-        return;
-    }
-
-    for (FastAlloc *p = inUseHead.inUseNext;
-         p != &inUseHead && n > 0;
-         p = p->inUseNext, --n) {
-        if (p->whenAllocated != 0)
-            cprintf("%x %15d %s\n", p, p->whenAllocated, typeid(*p).name());
-    }
-}
-
-
-// show oldest n items on in-use list for specified type
-void
-FastAlloc::dump_oldest_of_type(int n, const char *type_name)
-{
-    // sanity check: don't want to crash the debugger if you forget to
-    // pass in a parameter
-    if (n < 0 || n > numInUse) {
-        cprintf("FastAlloc::dump_oldest_of_type: bad arg %d "
-                "(%d objects in use)\n",
-                n, numInUse);
-        return;
-    }
-
-    for (FastAlloc *p = inUseHead.inUseNext;
-         p != &inUseHead && n > 0;
-         p = p->inUseNext) {
-        if (p->whenAllocated != 0 &&
-            strcmp(typeid(*p).name(), type_name) == 0) {
-            cprintf("%x %15d\n", p, p->whenAllocated);
-            --n;
-        }
-    }
-}
-
-
-//
-// C interfaces to FastAlloc::dump_summary() and FastAlloc::dump_oldest().
-// gdb seems to have trouble with calling C++ functions directly.
-//
-void
-fast_alloc_summary()
-{
-    FastAlloc::dump_summary();
-}
-
-void
-fast_alloc_oldest(int n)
-{
-    FastAlloc::dump_oldest(n);
-}
-
-#endif // FAST_ALLOC_DEBUG
-
-#endif // NO_FAST_ALLOC
+#endif // USE_FAST_ALLOC
-- 
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