misc: Fix a number of unitialised variables and members

Static analysis unearther a bunch of uninitialised variables and
members, and this patch addresses the problem. In all cases these
omissions seem benign in the end, but at least fixing them means less
false positives next time round.

6 files changed, 10 insertions, 6 deletions

diff --git a/src/mem/cache/base.cc b/src/mem/cache/base.cc
index 70d1b4167..faa000c09 100644
--- a/src/mem/cache/base.cc
+++ b/src/mem/cache/base.cc
@@ -67,6 +67,7 @@ BaseCache::CacheSlavePort::CacheSlavePort(const std::string &_name,
 
 BaseCache::BaseCache(const Params *p)
     : MemObject(p),
+      cpuSidePort(nullptr), memSidePort(nullptr),
       mshrQueue("MSHRs", p->mshrs, 4, MSHRQueue_MSHRs),
       writeBuffer("write buffer", p->write_buffers, p->mshrs+1000,
                   MSHRQueue_WriteBuffer),
@@ -77,6 +78,7 @@ BaseCache::BaseCache(const Params *p)
       forwardSnoops(p->forward_snoops),
       isTopLevel(p->is_top_level),
       blocked(0),
+      order(0),
       noTargetMSHR(NULL),
       missCount(p->max_miss_count),
       addrRanges(p->addr_ranges.begin(), p->addr_ranges.end()),
diff --git a/src/mem/cache/prefetch/base.cc b/src/mem/cache/prefetch/base.cc
index 57c1424bf..971ecf5b0 100644
--- a/src/mem/cache/prefetch/base.cc
+++ b/src/mem/cache/prefetch/base.cc
@@ -57,7 +57,8 @@
 #include "sim/system.hh"
 
 BasePrefetcher::BasePrefetcher(const Params *p)
-    : ClockedObject(p), size(p->size), latency(p->latency), degree(p->degree),
+    : ClockedObject(p), size(p->size), cache(nullptr), blkSize(0),
+      latency(p->latency), degree(p->degree),
       useMasterId(p->use_master_id), pageStop(!p->cross_pages),
       serialSquash(p->serial_squash), onlyData(p->data_accesses_only),
       onMissOnly(p->on_miss_only), onReadOnly(p->on_read_only),
@@ -69,6 +70,7 @@ BasePrefetcher::BasePrefetcher(const Params *p)
 void
 BasePrefetcher::setCache(BaseCache *_cache)
 {
+    assert(!cache);
     cache = _cache;
     blkSize = cache->getBlockSize();
 }
diff --git a/src/mem/cache/prefetch/base.hh b/src/mem/cache/prefetch/base.hh
index fc0dd0b36..22a4c68f6 100644
--- a/src/mem/cache/prefetch/base.hh
+++ b/src/mem/cache/prefetch/base.hh
@@ -83,7 +83,7 @@ class BasePrefetcher : public ClockedObject
     BaseCache* cache;
 
     /** The block size of the parent cache. */
-    int blkSize;
+    unsigned blkSize;
 
     /** The latency before a prefetch is issued */
     const Cycles latency;
diff --git a/src/mem/cache/tags/base.cc b/src/mem/cache/tags/base.cc
index 446c1ea49..2ec1379b0 100644
--- a/src/mem/cache/tags/base.cc
+++ b/src/mem/cache/tags/base.cc
@@ -56,13 +56,15 @@ using namespace std;
 
 BaseTags::BaseTags(const Params *p)
     : ClockedObject(p), blkSize(p->block_size), size(p->size),
-      hitLatency(p->hit_latency)
+      hitLatency(p->hit_latency), cache(nullptr), warmupBound(0),
+      warmedUp(false), numBlocks(0)
 {
 }
 
 void
 BaseTags::setCache(BaseCache *_cache)
 {
+    assert(!cache);
     cache = _cache;
 }
 
diff --git a/src/mem/cache/tags/base_set_assoc.cc b/src/mem/cache/tags/base_set_assoc.cc
index 637edd557..0d955255a 100644
--- a/src/mem/cache/tags/base_set_assoc.cc
+++ b/src/mem/cache/tags/base_set_assoc.cc
@@ -76,7 +76,6 @@ BaseSetAssoc::BaseSetAssoc(const Params *p)
     setShift = floorLog2(blkSize);
     setMask = numSets - 1;
     tagShift = setShift + floorLog2(numSets);
-    warmedUp = false;
     /** @todo Make warmup percentage a parameter. */
     warmupBound = numSets * assoc;
 
diff --git a/src/mem/cache/tags/fa_lru.cc b/src/mem/cache/tags/fa_lru.cc
index 6526aadb8..6a63da673 100644
--- a/src/mem/cache/tags/fa_lru.cc
+++ b/src/mem/cache/tags/fa_lru.cc
@@ -55,7 +55,7 @@
 using namespace std;
 
 FALRU::FALRU(const Params *p)
-    : BaseTags(p)
+    : BaseTags(p), cacheBoundaries(nullptr)
 {
     if (!isPowerOf2(blkSize))
         fatal("cache block size (in bytes) `%d' must be a power of two",
@@ -74,7 +74,6 @@ FALRU::FALRU(const Params *p)
         cacheMask = 0;
     }
 
-    warmedUp = false;
     warmupBound = size/blkSize;
     numBlocks = size/blkSize;