Fixed various simulator-related space leaks.

src/ppc/simulator-ppc.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stdarg.h>
 #include <stdlib.h>
 #include <cmath>
 
 #include "src/v8.h"
 
@@ skipping 812 matching lines @@
   // The sp is initialized to point to the bottom (high address) of the
   // allocated stack area. To be safe in potential stack underflows we leave
   // some buffer below.
   registers_[sp] = reinterpret_cast<intptr_t>(stack_) + stack_size - 64;
   InitializeCoverage();
 
   last_debugger_input_ = NULL;
 }
 
 
-Simulator::~Simulator() {}
+Simulator::~Simulator() { free(stack_); }
 
 
 // When the generated code calls an external reference we need to catch that in
 // the simulator.  The external reference will be a function compiled for the
 // host architecture.  We need to call that function instead of trying to
 // execute it with the simulator.  We do that by redirecting the external
 // reference to a svc (Supervisor Call) instruction that is handled by
 // the simulator.  We write the original destination of the jump just at a known
 // offset from the svc instruction so the simulator knows what to call.
 class Redirection {
@@ skipping 37 matching lines @@
         addr_of_swi - OFFSET_OF(Redirection, swi_instruction_);
     return reinterpret_cast<Redirection*>(addr_of_redirection);
   }
 
   static void* ReverseRedirection(intptr_t reg) {
     Redirection* redirection = FromSwiInstruction(
         reinterpret_cast<Instruction*>(reinterpret_cast<void*>(reg)));
     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_;
   ExternalReference::Type type_;
   Redirection* next_;
 };
 
 
+// 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);
   return redirection->address_of_swi_instruction();
 }
 
 
 // Get the active Simulator for the current thread.
 Simulator* Simulator::current(Isolate* isolate) {
   v8::internal::Isolate::PerIsolateThreadData* isolate_data =
@@ skipping 2966 matching lines @@
   uintptr_t* stack_slot = reinterpret_cast<uintptr_t*>(current_sp);
   uintptr_t address = *stack_slot;
   set_register(sp, current_sp + sizeof(uintptr_t));
   return address;
 }
 }
 }  // namespace v8::internal
 
 #endif  // USE_SIMULATOR
 #endif  // V8_TARGET_ARCH_PPC