Improved function entry hook coverage

src/isolate.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1736 matching lines @@
       global_handles_(NULL),
       context_switcher_(NULL),
       thread_manager_(NULL),
       fp_stubs_generated_(false),
       has_installed_extensions_(false),
       string_tracker_(NULL),
       regexp_stack_(NULL),
       date_cache_(NULL),
       code_stub_interface_descriptors_(NULL),
       context_exit_happened_(false),
+      initialized_from_snapshot_(false),
       cpu_profiler_(NULL),
       heap_profiler_(NULL),
+      function_entry_hook_(NULL),
       deferred_handles_head_(NULL),
       optimizing_compiler_thread_(this),
       marking_thread_(NULL),
       sweeper_thread_(NULL),
       callback_table_(NULL) {
   id_ = NoBarrier_AtomicIncrement(&isolate_counter_, 1);
   TRACE_ISOLATE(constructor);
 
   memset(isolate_addresses_, 0,
       sizeof(isolate_addresses_[0]) * (kIsolateAddressCount + 1));
@@ skipping 305 matching lines @@
   Release_Store(&debugger_initialized_, true);
 #endif
 }
 
 
 bool Isolate::Init(Deserializer* des) {
   ASSERT(state_ != INITIALIZED);
   ASSERT(Isolate::Current() == this);
   TRACE_ISOLATE(init);
 
+  if (function_entry_hook() != NULL) {
+    // When function entry hooking is in effect, we have to create the code
+    // stubs from scratch to get entry hooks, rather than loading the previously
+    // generated stubs from disk.
+    // If this assert fires, the initialization path has regressed.
+    ASSERT(des == NULL);
+  }
+
   // The initialization process does not handle memory exhaustion.
   DisallowAllocationFailure disallow_allocation_failure;
 
   InitializeLoggingAndCounters();
 
   InitializeDebugger();
 
   memory_allocator_ = new MemoryAllocator(this);
   code_range_ = new CodeRange(this);
 
@@ skipping 199 matching lines @@
     }
   } else {
     FLAG_concurrent_sweeping = false;
     FLAG_parallel_sweeping = false;
   }
   if (FLAG_parallel_recompilation &&
       SystemThreadManager::NumberOfParallelSystemThreads(
           SystemThreadManager::PARALLEL_RECOMPILATION) == 0) {
     FLAG_parallel_recompilation = false;
   }
+
+  initialized_from_snapshot_ = (des != NULL);
+
   return true;
 }
 
 
 // Initialized lazily to allow early
 // v8::V8::SetAddHistogramSampleFunction calls.
 StatsTable* Isolate::stats_table() {
   if (stats_table_ == NULL) {
     stats_table_ = new StatsTable;
   }
@@ skipping 158 matching lines @@
 
 #ifdef DEBUG
 #define ISOLATE_FIELD_OFFSET(type, name, ignored)                       \
 const intptr_t Isolate::name##_debug_offset_ = OFFSET_OF(Isolate, name##_);
 ISOLATE_INIT_LIST(ISOLATE_FIELD_OFFSET)
 ISOLATE_INIT_ARRAY_LIST(ISOLATE_FIELD_OFFSET)
 #undef ISOLATE_FIELD_OFFSET
 #endif
 
 } }  // namespace v8::internal