From: simonmar@microsoft.com <unknown>
Date: Fri, 14 Dec 2007 13:59:09 +0000 (+0000)
Subject: findSlop: useful function for tracking down excessive slop in gdb
X-Git-Tag: Before_cabalised-GHC~269
X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=commitdiff_plain;h=de6a898b43cacc69cd9bc4c6675d3e8771047f17

findSlop: useful function for tracking down excessive slop in gdb
---

diff --git a/rts/sm/Storage.c b/rts/sm/Storage.c
index ecd9b54..2305996 100644
--- a/rts/sm/Storage.c
+++ b/rts/sm/Storage.c
@@ -1118,6 +1118,21 @@ void freeExec (void *addr)
 
 #ifdef DEBUG
 
+// Useful for finding partially full blocks in gdb
+void findSlop(bdescr *bd);
+void findSlop(bdescr *bd)
+{
+    lnat slop;
+
+    for (; bd != NULL; bd = bd->link) {
+        slop = (bd->blocks * BLOCK_SIZE_W) - (bd->free - bd->start);
+        if (slop > (1024/sizeof(W_))) {
+            debugBelch("block at %p (bdescr %p) has %ldKB slop\n",
+                       bd->start, bd, slop / (1024/sizeof(W_)));
+        }
+    }
+}
+
 nat
 countBlocks(bdescr *bd)
 {