Bug 817812 - Fix --enable-root-analysis compile. r=terrence

The recent jsgc.cpp splitup removed some functions that my rooting analysis optimization depended on. This patch exposes a simplified IsAddressableGCThing overload and uses it.

--HG--
extra : rebase_source : a9295ec574824462d3b8c0c9f7bca3a4baec1300

js/src/gc/GCInternals.h

@@ -83,6 +83,11 @@ class IncrementalSafety
 IncrementalSafety
 IsIncrementalGCSafe(JSRuntime *rt);
 
+#ifdef JSGC_ROOT_ANALYSIS
+bool
+IsAddressableGCThing(JSRuntime *rt, uintptr_t w);
+#endif
+
 #ifdef JS_GC_ZEAL
 void
 StartVerifyPreBarriers(JSRuntime *rt);

js/src/gc/RootMarking.cpp

@@ -205,6 +205,19 @@ IsAddressableGCThing(JSRuntime *rt, uintptr_t w,
     return CGCT_VALID;
 }
 
+#ifdef JSGC_ROOT_ANALYSIS
+bool
+js::gc::IsAddressableGCThing(JSRuntime *rt, uintptr_t w)
+{
+    void *thing;
+    ArenaHeader *aheader;
+    AllocKind thingKind;
+    ConservativeGCTest status =
+        IsAddressableGCThing(rt, w, false, &thingKind, &aheader, &thing);
+    return status == CGCT_VALID;
+}
+#endif
+
 /*
  * Returns CGCT_VALID and mark it if the w can be a  live GC thing and sets
  * thingKind accordingly. Otherwise returns the reason for rejection.

js/src/gc/Verifier.cpp

@@ -11,6 +11,8 @@
 #include "jsprf.h"
 #include "jsutil.h"
 
+#include "mozilla/Util.h"
+
 #include "js/HashTable.h"
 #include "gc/GCInternals.h"
 
@@ -22,6 +24,7 @@
 
 using namespace js;
 using namespace js::gc;
+using namespace mozilla;
 
 #if defined(DEBUG) && defined(JS_GC_ZEAL) && defined(JSGC_ROOT_ANALYSIS) && !defined(JS_THREADSAFE)
 
@@ -48,12 +51,7 @@ CheckStackRoot(JSRuntime *rt, uintptr_t *w, Rooter *begin, Rooter *end)
     VALGRIND_MAKE_MEM_DEFINED(&w, sizeof(w));
 #endif
 
-    void *thing;
-    ArenaHeader *aheader;
-    AllocKind thingKind;
-    ConservativeGCTest status =
-        IsAddressableGCThing(rt, *w, false, &thingKind, &aheader, &thing);
-    if (status != CGCT_VALID)
+    if (!IsAddressableGCThing(rt, *w))
         return;
     /*
      * Note that |thing| may be in a free list (InFreeList(aheader, thing)),
@@ -161,9 +159,9 @@ SuppressCheckRoots(Vector<Rooter, 0, SystemAllocPolicy> &rooters)
     unsigned int pos;
 
     // Compute the hash of the current stack
-    uint32_t hash = mozilla::HashGeneric(&pos);
+    uint32_t hash = HashGeneric(&pos);
     for (unsigned int i = 0; i < Min(StackCheckDepth, rooters.length()); i++)
-        hash = mozilla::AddToHash(hash, rooters[rooters.length() - i - 1].rooter);
+        hash = AddToHash(hash, rooters[rooters.length() - i - 1].rooter);
 
     // Scan through the remembered stacks to find the current stack
     for (pos = 0; pos < numMemories; pos++) {
@@ -291,7 +289,8 @@ JS::CheckStackRoots(JSContext *cx)
     JS_ASSERT(stackMin <= stackEnd);
     CheckStackRootsRangeAndSkipIon(rt, stackMin, stackEnd, firstToScan, rooters.end());
     CheckStackRootsRange(rt, cgcd->registerSnapshot.words,
-                         ArrayEnd(cgcd->registerSnapshot.words), firstToScan, rooters.end());
+                         ArrayEnd(cgcd->registerSnapshot.words),
+                         firstToScan, rooters.end());
 
     // Mark all rooters as scanned
     for (Rooter *p = rooters.begin(); p != rooters.end(); p++)