Bug 623301 - Properly root arguments names during a call to Function(). r=brendan

--HG--
extra : rebase_source : 4c397e75a23eca275c6fea1b50d675ff23fea2ba

js/src/jscntxt.h

@@ -2318,7 +2318,8 @@ class AutoGCRooter {
         VALVECTOR =   -12, /* js::AutoValueVector */
         DESCRIPTOR =  -13, /* js::AutoPropertyDescriptorRooter */
         STRING =      -14, /* js::AutoStringRooter */
-        IDVECTOR =    -15  /* js::AutoIdVector */
+        IDVECTOR =    -15, /* js::AutoIdVector */
+        BINDINGS =    -16  /* js::Bindings */
     };
 
     private:
@@ -2635,9 +2636,11 @@ class AutoEnumStateRooter : private AutoGCRooter
 #ifdef JS_HAS_XML_SUPPORT
 class AutoXMLRooter : private AutoGCRooter {
   public:
-    AutoXMLRooter(JSContext *cx, JSXML *xml)
+    AutoXMLRooter(JSContext *cx, JSXML *xml
+                  JS_GUARD_OBJECT_NOTIFIER_PARAM)
       : AutoGCRooter(cx, XML), xml(xml)
     {
+        JS_GUARD_OBJECT_NOTIFIER_INIT;
         JS_ASSERT(xml);
     }
 
@@ -2646,30 +2649,69 @@ class AutoXMLRooter : private AutoGCRooter {
 
   private:
     JSXML * const xml;
+    JS_DECL_USE_GUARD_OBJECT_NOTIFIER
 };
 #endif /* JS_HAS_XML_SUPPORT */
 
+class AutoBindingsRooter : private AutoGCRooter {
+  public:
+    AutoBindingsRooter(JSContext *cx, Bindings &bindings
+                       JS_GUARD_OBJECT_NOTIFIER_PARAM)
+      : AutoGCRooter(cx, BINDINGS), bindings(bindings)
+    {
+        JS_GUARD_OBJECT_NOTIFIER_INIT;
+    }
+
+    friend void AutoGCRooter::trace(JSTracer *trc);
+
+  private:
+    Bindings &bindings;
+    JS_DECL_USE_GUARD_OBJECT_NOTIFIER
+};
+
 class AutoLockGC {
-private:
-    JSRuntime *rt;
-public:
-    explicit AutoLockGC(JSRuntime *rt) : rt(rt) { JS_LOCK_GC(rt); }
+  public:
+    explicit AutoLockGC(JSRuntime *rt
+                        JS_GUARD_OBJECT_NOTIFIER_PARAM)
+      : rt(rt)
+    {
+        JS_GUARD_OBJECT_NOTIFIER_INIT;
+        JS_LOCK_GC(rt);
+    }
     ~AutoLockGC() { JS_UNLOCK_GC(rt); }
+
+  private:
+    JSRuntime *rt;
+    JS_DECL_USE_GUARD_OBJECT_NOTIFIER
 };
 
 class AutoUnlockGC {
-private:
+  private:
     JSRuntime *rt;
-public:
-    explicit AutoUnlockGC(JSRuntime *rt) : rt(rt) { JS_UNLOCK_GC(rt); }
+    JS_DECL_USE_GUARD_OBJECT_NOTIFIER
+
+  public:
+    explicit AutoUnlockGC(JSRuntime *rt
+                          JS_GUARD_OBJECT_NOTIFIER_PARAM)
+      : rt(rt)
+    {
+        JS_GUARD_OBJECT_NOTIFIER_INIT;
+        JS_UNLOCK_GC(rt);
+    }
     ~AutoUnlockGC() { JS_LOCK_GC(rt); }
 };
 
 class AutoLockDefaultCompartment {
   private:
-      JSContext *cx;
+    JSContext *cx;
+    JS_DECL_USE_GUARD_OBJECT_NOTIFIER
+
   public:
-    AutoLockDefaultCompartment(JSContext *cx) : cx(cx) {
+    AutoLockDefaultCompartment(JSContext *cx
+                               JS_GUARD_OBJECT_NOTIFIER_PARAM)
+      : cx(cx)
+    {
+        JS_GUARD_OBJECT_NOTIFIER_INIT;
         JS_LOCK(cx, &cx->runtime->atomState.lock);
 #ifdef JS_THREADSAFE
         cx->runtime->defaultCompartmentIsLocked = true;
@@ -2684,10 +2726,15 @@ class AutoLockDefaultCompartment {
 };
 
 class AutoUnlockDefaultCompartment {
-  private:
-      JSContext *cx;
+    JSContext *cx;
+    JS_DECL_USE_GUARD_OBJECT_NOTIFIER
+
   public:
-    AutoUnlockDefaultCompartment(JSContext *cx) : cx(cx) {
+    AutoUnlockDefaultCompartment(JSContext *cx
+                                 JS_GUARD_OBJECT_NOTIFIER_PARAM)
+      : cx(cx)
+    {
+        JS_GUARD_OBJECT_NOTIFIER_INIT;
 #ifdef JS_THREADSAFE
         cx->runtime->defaultCompartmentIsLocked = false;
 #endif
@@ -2703,16 +2750,31 @@ class AutoUnlockDefaultCompartment {
 
 class AutoKeepAtoms {
     JSRuntime *rt;
+    JS_DECL_USE_GUARD_OBJECT_NOTIFIER
+
   public:
-    explicit AutoKeepAtoms(JSRuntime *rt) : rt(rt) { JS_KEEP_ATOMS(rt); }
+    explicit AutoKeepAtoms(JSRuntime *rt
+                           JS_GUARD_OBJECT_NOTIFIER_PARAM)
+      : rt(rt)
+    {
+        JS_GUARD_OBJECT_NOTIFIER_INIT;
+        JS_KEEP_ATOMS(rt);
+    }
     ~AutoKeepAtoms() { JS_UNKEEP_ATOMS(rt); }
 };
 
 class AutoArenaAllocator {
     JSArenaPool *pool;
     void        *mark;
+    JS_DECL_USE_GUARD_OBJECT_NOTIFIER
+
   public:
-    explicit AutoArenaAllocator(JSArenaPool *pool) : pool(pool) { mark = JS_ARENA_MARK(pool); }
+    explicit AutoArenaAllocator(JSArenaPool *pool
+                                JS_GUARD_OBJECT_NOTIFIER_PARAM)
+      : pool(pool), mark(JS_ARENA_MARK(pool))
+    {
+        JS_GUARD_OBJECT_NOTIFIER_INIT;
+    }
     ~AutoArenaAllocator() { JS_ARENA_RELEASE(pool, mark); }
 
     template <typename T>
@@ -2726,9 +2788,17 @@ class AutoArenaAllocator {
 class AutoReleasePtr {
     JSContext   *cx;
     void        *ptr;
+    JS_DECL_USE_GUARD_OBJECT_NOTIFIER
+
     AutoReleasePtr operator=(const AutoReleasePtr &other);
+
   public:
-    explicit AutoReleasePtr(JSContext *cx, void *ptr) : cx(cx), ptr(ptr) {}
+    explicit AutoReleasePtr(JSContext *cx, void *ptr
+                            JS_GUARD_OBJECT_NOTIFIER_PARAM)
+      : cx(cx), ptr(ptr)
+    {
+        JS_GUARD_OBJECT_NOTIFIER_INIT;
+    }
     ~AutoReleasePtr() { cx->free(ptr); }
 };
 
@@ -2738,9 +2808,17 @@ class AutoReleasePtr {
 class AutoReleaseNullablePtr {
     JSContext   *cx;
     void        *ptr;
+    JS_DECL_USE_GUARD_OBJECT_NOTIFIER
+
     AutoReleaseNullablePtr operator=(const AutoReleaseNullablePtr &other);
+
   public:
-    explicit AutoReleaseNullablePtr(JSContext *cx, void *ptr) : cx(cx), ptr(ptr) {}
+    explicit AutoReleaseNullablePtr(JSContext *cx, void *ptr
+                                    JS_GUARD_OBJECT_NOTIFIER_PARAM)
+      : cx(cx), ptr(ptr)
+    {
+        JS_GUARD_OBJECT_NOTIFIER_INIT;
+    }
     void reset(void *ptr2) {
         if (ptr)
             cx->free(ptr);

js/src/jsfun.cpp

@@ -2430,6 +2430,7 @@ Function(JSContext *cx, uintN argc, Value *vp)
     }
 
     Bindings bindings(cx);
+    AutoBindingsRooter root(cx, bindings);
 
     Value *argv = vp + 2;
     uintN n = argc ? argc - 1 : 0;

js/src/jsgc.cpp

@@ -1601,6 +1601,11 @@ AutoGCRooter::trace(JSTracer *trc)
         MarkIdRange(trc, vector.length(), vector.begin(), "js::AutoIdVector.vector");
         return;
       }
+
+      case BINDINGS: {
+        static_cast<js::AutoBindingsRooter *>(this)->bindings.trace(trc);
+        return;
+      }
     }
 
     JS_ASSERT(tag >= 0);

js/src/jsscript.cpp

@@ -401,6 +401,7 @@ js_XDRScript(JSXDRState *xdr, JSScript **scriptp, JSBool *hasMagic)
     JS_ASSERT(nupvars != Bindings::BINDING_COUNT_LIMIT);
 
     Bindings bindings(cx);
+    AutoBindingsRooter rooter(cx, bindings);
     uint32 nameCount = nargs + nvars + nupvars;
     if (nameCount > 0) {
         struct AutoMark {

js/src/tests/ecma_5/Function/Function-arguments-gc.js

@@ -0,0 +1,38 @@
+/*
+ * Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/licenses/publicdomain/
+ * Contributor:
+ *   Christian Holler <decoder@own-hero.net>
+ */
+
+//-----------------------------------------------------------------------------
+var BUGNUMBER = 623301;
+var summary = "Properly root argument names during Function()";
+print(BUGNUMBER + ": " + summary);
+
+/**************
+ * BEGIN TEST *
+ **************/
+
+if (typeof gczeal === "function")
+  gczeal(2);
+
+function crashMe(n)
+{
+  var nasty = [];
+  while (n--)
+    nasty.push("a" + n);
+  return Function.apply(null, nasty);
+}
+
+var count = 64; // exact value not important
+assertEq(crashMe(count + 1).length, count);
+
+gczeal(0); // reset
+
+/******************************************************************************/
+
+if (typeof reportCompare === "function")
+  reportCompare(true, true);
+
+print("All tests passed!");

js/src/tests/ecma_5/Function/jstests.list

@@ -9,3 +9,4 @@ script function-bind.js
 script function-call.js
 script redefine-arguments-length.js
 script builtin-no-prototype.js
+script Function-arguments-gc.js