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      1 // Copyright 2006-2008 the V8 project authors. All rights reserved.
      2 // Redistribution and use in source and binary forms, with or without
      3 // modification, are permitted provided that the following conditions are
      4 // met:
      5 //
      6 //     * Redistributions of source code must retain the above copyright
      7 //       notice, this list of conditions and the following disclaimer.
      8 //     * Redistributions in binary form must reproduce the above
      9 //       copyright notice, this list of conditions and the following
     10 //       disclaimer in the documentation and/or other materials provided
     11 //       with the distribution.
     12 //     * Neither the name of Google Inc. nor the names of its
     13 //       contributors may be used to endorse or promote products derived
     14 //       from this software without specific prior written permission.
     15 //
     16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
     19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
     22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27 
     28 //
     29 // Top include for all V8 .cc files.
     30 //
     31 
     32 #ifndef V8_V8_H_
     33 #define V8_V8_H_
     34 
     35 #if defined(GOOGLE3)
     36 // Google3 special flag handling.
     37 #if defined(DEBUG) && defined(NDEBUG)
     38 // If both are defined in Google3, then we are building an optimized v8 with
     39 // assertions enabled.
     40 #undef NDEBUG
     41 #elif !defined(DEBUG) && !defined(NDEBUG)
     42 // If neither is defined in Google3, then we are building a debug v8. Mark it
     43 // as such.
     44 #define DEBUG
     45 #endif
     46 #endif  // defined(GOOGLE3)
     47 
     48 // V8 only uses DEBUG, but included external files
     49 // may use NDEBUG - make sure they are consistent.
     50 #if defined(DEBUG) && defined(NDEBUG)
     51 #error both DEBUG and NDEBUG are set
     52 #endif
     53 
     54 // Basic includes
     55 #include "../include/v8.h"
     56 #include "v8globals.h"
     57 #include "v8checks.h"
     58 #include "allocation.h"
     59 #include "v8utils.h"
     60 #include "flags.h"
     61 
     62 // Objects & heap
     63 #include "objects-inl.h"
     64 #include "spaces-inl.h"
     65 #include "heap-inl.h"
     66 #include "log-inl.h"
     67 #include "cpu-profiler-inl.h"
     68 #include "handles-inl.h"
     69 
     70 namespace v8 {
     71 namespace internal {
     72 
     73 class Deserializer;
     74 
     75 class V8 : public AllStatic {
     76  public:
     77   // Global actions.
     78 
     79   // If Initialize is called with des == NULL, the initial state is
     80   // created from scratch. If a non-null Deserializer is given, the
     81   // initial state is created by reading the deserialized data into an
     82   // empty heap.
     83   static bool Initialize(Deserializer* des);
     84   static void TearDown();
     85   static bool IsRunning() { return is_running_; }
     86   static bool UseCrankshaft() { return use_crankshaft_; }
     87   // To be dead you have to have lived
     88   // TODO(isolates): move IsDead to Isolate.
     89   static bool IsDead() { return has_fatal_error_ || has_been_disposed_; }
     90   static void SetFatalError();
     91 
     92   // Report process out of memory. Implementation found in api.cc.
     93   static void FatalProcessOutOfMemory(const char* location,
     94                                       bool take_snapshot = false);
     95 
     96   // Random number generation support. Not cryptographically safe.
     97   static uint32_t Random(Isolate* isolate);
     98   // We use random numbers internally in memory allocation and in the
     99   // compilers for security. In order to prevent information leaks we
    100   // use a separate random state for internal random number
    101   // generation.
    102   static uint32_t RandomPrivate(Isolate* isolate);
    103   static Object* FillHeapNumberWithRandom(Object* heap_number,
    104                                           Isolate* isolate);
    105 
    106   // Idle notification directly from the API.
    107   static bool IdleNotification();
    108 
    109  private:
    110   static void InitializeOncePerProcess();
    111 
    112   // True if engine is currently running
    113   static bool is_running_;
    114   // True if V8 has ever been run
    115   static bool has_been_setup_;
    116   // True if error has been signaled for current engine
    117   // (reset to false if engine is restarted)
    118   static bool has_fatal_error_;
    119   // True if engine has been shut down
    120   // (reset if engine is restarted)
    121   static bool has_been_disposed_;
    122   // True if we are using the crankshaft optimizing compiler.
    123   static bool use_crankshaft_;
    124 };
    125 
    126 } }  // namespace v8::internal
    127 
    128 namespace i = v8::internal;
    129 
    130 #endif  // V8_V8_H_
    131