Fixed various simulator-related space leaks.

src/ppc/simulator-ppc.cc

Index: src/ppc/simulator-ppc.cc
diff --git a/src/ppc/simulator-ppc.cc b/src/ppc/simulator-ppc.cc
index 7139ead2134aff860c657c7099d347b62a884f8d..31fcc9e6cdb48a62e964454f13f4b7478c699191 100644
--- a/src/ppc/simulator-ppc.cc
+++ b/src/ppc/simulator-ppc.cc
@@ -830,7 +830,7 @@ Simulator::Simulator(Isolate* isolate) : isolate_(isolate) {
 }
 
 
-Simulator::~Simulator() {}
+Simulator::~Simulator() { free(stack_); }
 
 
 // When the generated code calls an external reference we need to catch that in
@@ -888,6 +888,14 @@ class Redirection {
     return redirection->external_function();
   }
 
+  static void DeleteChain(Redirection* redirection) {
+    while (redirection != nullptr) {
+      Redirection* next = redirection->next_;
+      delete redirection;
+      redirection = next;
+    }
+  }
+
  private:
   void* external_function_;
   uint32_t swi_instruction_;
@@ -896,6 +904,19 @@ class Redirection {
 };
 
 
+// static
+void Simulator::TearDown(HashMap* i_cache, Redirection* first) {
+  Redirection::DeleteChain(first);
+  if (i_cache != nullptr) {
+    for (HashMap::Entry* entry = i_cache->Start(); entry != nullptr;
+         entry = i_cache->Next(entry)) {
+      delete static_cast<CachePage*>(entry->value);
+    }
+    delete i_cache;
+  }
+}
+
+
 void* Simulator::RedirectExternalReference(void* external_function,
                                            ExternalReference::Type type) {
   Redirection* redirection = Redirection::Get(external_function, type);