Revert r15361 "Improved function entry hook coverage" because of ARM build error.

R=siggi@chromium.org
BUG=

Review URL: https://chromiumcodereview.appspot.com/18062006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15365 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

include/v8.h

@@ -4476,26 +4476,19 @@ class V8EXPORT V8 {
   static void SetReturnAddressLocationResolver(
       ReturnAddressLocationResolver return_address_resolver);
 
-  /**
-   * Deprecated, use the variant with the Isolate parameter below instead.
-   */
-  V8_DEPRECATED(static bool SetFunctionEntryHook(FunctionEntryHook entry_hook));
-
   /**
    * Allows the host application to provide the address of a function that's
    * invoked on entry to every V8-generated function.
    * Note that \p entry_hook is invoked at the very start of each
    * generated function.
    *
-   * \param isolate the isolate to operate on.
    * \param entry_hook a function that will be invoked on entry to every
    *   V8-generated function.
    * \returns true on success on supported platforms, false on failure.
-   * \note Setting an entry hook can only be done very early in an isolates
+   * \note Setting a new entry hook function when one is already active will
-   *   lifetime, and once set, the entry hook cannot be revoked.
+   *   fail.
    */
-  static bool SetFunctionEntryHook(Isolate* isolate,
+  static bool SetFunctionEntryHook(FunctionEntryHook entry_hook);
-                                   FunctionEntryHook entry_hook);
 
   /**
    * Allows the host application to provide the address of a function that is

src/api.cc

@@ -300,13 +300,8 @@ static inline bool EmptyCheck(const char* location, const v8::Data* obj) {
 // --- S t a t i c s ---
 
 
-static bool InitializeHelper(i::Isolate* isolate) {
+static bool InitializeHelper() {
-  // If the isolate has a function entry hook, it needs to re-build all its
+  if (i::Snapshot::Initialize()) return true;
-  // code stubs with entry hooks embedded, so let's deserialize a snapshot.
-  if (isolate == NULL || isolate->function_entry_hook() == NULL) {
-    if (i::Snapshot::Initialize())
-      return true;
-  }
   return i::V8::Initialize(NULL);
 }
 
@@ -318,7 +313,7 @@ static inline bool EnsureInitializedForIsolate(i::Isolate* isolate,
     if (isolate->IsInitialized()) return true;
   }
   ASSERT(isolate == i::Isolate::Current());
-  return ApiCheck(InitializeHelper(isolate), location, "Error initializing V8");
+  return ApiCheck(InitializeHelper(), location, "Error initializing V8");
 }
 
 // Some initializing API functions are called early and may be
@@ -5216,7 +5211,7 @@ bool v8::V8::Initialize() {
   if (isolate != NULL && isolate->IsInitialized()) {
     return true;
   }
-  return InitializeHelper(isolate);
+  return InitializeHelper();
 }
 
 
@@ -5232,30 +5227,7 @@ void v8::V8::SetReturnAddressLocationResolver(
 
 
 bool v8::V8::SetFunctionEntryHook(FunctionEntryHook entry_hook) {
-  return SetFunctionEntryHook(Isolate::GetCurrent(), entry_hook);
+  return i::ProfileEntryHookStub::SetFunctionEntryHook(entry_hook);
-}
-
-
-bool v8::V8::SetFunctionEntryHook(Isolate* ext_isolate,
-                                  FunctionEntryHook entry_hook) {
-  ASSERT(ext_isolate != NULL);
-  ASSERT(entry_hook != NULL);
-
-  i::Isolate* isolate = reinterpret_cast<i::Isolate*>(ext_isolate);
-
-  // The entry hook can only be set before the Isolate is initialized, as
-  // otherwise the Isolate's code stubs generated at initialization won't
-  // contain entry hooks.
-  if (isolate->IsInitialized())
-    return false;
-
-  // Setting an entry hook is a one-way operation, once set, it cannot be
-  // changed or unset.
-  if (isolate->function_entry_hook() != NULL)
-    return false;
-
-  isolate->set_function_entry_hook(entry_hook);
-  return true;
 }
 
 

src/arm/builtins-arm.cc

@@ -717,7 +717,6 @@ static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
   // r3: argc
   // r4: argv
   // r5-r7, cp may be clobbered
-  ProfileEntryHookStub::MaybeCallEntryHook(masm);
 
   // Clear the context before we push it when entering the internal frame.
   __ mov(cp, Operand::Zero());

src/arm/code-stubs-arm.cc

@@ -3181,8 +3181,6 @@ void CEntryStub::Generate(MacroAssembler* masm) {
   // sp: stack pointer  (restored as callee's sp after C call)
   // cp: current context  (C callee-saved)
 
-  ProfileEntryHookStub::MaybeCallEntryHook(masm);
-
   // Result returned in r0 or r0+r1 by default.
 
   // NOTE: Invocations of builtins may return failure objects
@@ -3273,8 +3271,6 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
 
   Label invoke, handler_entry, exit;
 
-  ProfileEntryHookStub::MaybeCallEntryHook(masm);
-
   // Called from C, so do not pop argc and args on exit (preserve sp)
   // No need to save register-passed args
   // Save callee-saved registers (incl. cp and fp), sp, and lr
@@ -7075,9 +7071,8 @@ void StubFailureTrampolineStub::Generate(MacroAssembler* masm) {
 
 
 void ProfileEntryHookStub::MaybeCallEntryHook(MacroAssembler* masm) {
-  if (masm->isolate()->function_entry_hook() != NULL) {
+  if (entry_hook_ != NULL) {
     PredictableCodeSizeScope predictable(masm, 4 * Assembler::kInstrSize);
-    AllowStubCallsScope allow_stub_calls(masm, true);
     ProfileEntryHookStub stub;
     __ push(lr);
     __ CallStub(&stub);
@@ -7091,21 +7086,9 @@ void ProfileEntryHookStub::Generate(MacroAssembler* masm) {
   const int32_t kReturnAddressDistanceFromFunctionStart =
       3 * Assembler::kInstrSize;
 
-  // This should contain all kCallerSaved registers.
+  // Save live volatile registers.
-  const RegList kSavedRegs =
+  __ Push(lr, r5, r1);
-      1 <<  0 |  // r0
+  const int32_t kNumSavedRegs = 3;
-      1 <<  1 |  // r1
-      1 <<  2 |  // r2
-      1 <<  3 |  // r3
-      1 <<  5 |  // r5
-      1 <<  9;   // r9
-  // We also save lr, so the count here is one higher than the mask indicates.
-  const int32_t kNumSavedRegs = 7;
-
-  ASSERT((kCallerSaved & kSavedRegs) == kCallerSaved);
-
-  // Save all caller-save registers as this may be called from anywhere.
-  __ stm(db_w, sp, kSavedRegs | lr.bit());
 
   // Compute the function's address for the first argument.
   __ sub(r0, lr, Operand(kReturnAddressDistanceFromFunctionStart));
@@ -7123,12 +7106,14 @@ void ProfileEntryHookStub::Generate(MacroAssembler* masm) {
   }
 
 #if defined(V8_HOST_ARCH_ARM)
-  __ mov(ip, FUNCTION_ADDR(masm->isolate()->function_entry_hook()),
+  __ mov(ip, Operand(reinterpret_cast<int32_t>(&entry_hook_)));
-         RelocInfo::NONE));
+  __ ldr(ip, MemOperand(ip));
 #else
   // Under the simulator we need to indirect the entry hook through a
   // trampoline function at a known address.
-  ApiFunction dispatcher(FUNCTION_ADDR(EntryHookTrampoline));
+  Address trampoline_address = reinterpret_cast<Address>(
+      reinterpret_cast<intptr_t>(EntryHookTrampoline));
+  ApiFunction dispatcher(trampoline_address);
   __ mov(ip, Operand(ExternalReference(&dispatcher,
                                        ExternalReference::BUILTIN_CALL,
                                        masm->isolate())));
@@ -7140,8 +7125,8 @@ void ProfileEntryHookStub::Generate(MacroAssembler* masm) {
     __ mov(sp, r5);
   }
 
-  // Also pop pc to get Ret(0).
+  __ Pop(lr, r5, r1);
-  __ ldm(ia_w, sp, kSavedRegs | pc.bit());
+  __ Ret();
 }
 
 

src/bootstrapper.cc

@@ -2575,14 +2575,7 @@ Genesis::Genesis(Isolate* isolate,
   StackLimitCheck check(isolate);
   if (check.HasOverflowed()) return;
 
-  // We can only de-serialize a context if the isolate was initialized from
-  // a snapshot. Otherwise we have to build the context from scratch.
-  if (isolate->initialized_from_snapshot()) {
   native_context_ = Snapshot::NewContextFromSnapshot();
-  } else {
-    native_context_ = Handle<Context>();
-  }
-
   if (!native_context().is_null()) {
     AddToWeakNativeContextList(*native_context());
     isolate->set_context(*native_context());

src/code-stubs.cc

@@ -757,11 +757,24 @@ void StubFailureTrampolineStub::GenerateAheadOfTime(Isolate* isolate) {
 }
 
 
+FunctionEntryHook ProfileEntryHookStub::entry_hook_ = NULL;
+
+
 void ProfileEntryHookStub::EntryHookTrampoline(intptr_t function,
                                                intptr_t stack_pointer) {
-  FunctionEntryHook entry_hook = Isolate::Current()->function_entry_hook();
+  if (entry_hook_ != NULL)
-  ASSERT(entry_hook != NULL);
+    entry_hook_(function, stack_pointer);
-  entry_hook(function, stack_pointer);
+}
+
+
+bool ProfileEntryHookStub::SetFunctionEntryHook(FunctionEntryHook entry_hook) {
+  // We don't allow setting a new entry hook over one that's
+  // already active, as the hooks won't stack.
+  if (entry_hook != 0 && entry_hook_ != 0)
+    return false;
+
+  entry_hook_ = entry_hook;
+  return true;
 }
 
 

src/code-stubs.h

@@ -2135,6 +2135,13 @@ class ProfileEntryHookStub : public PlatformCodeStub {
   // Generates a call to the entry hook if it's enabled.
   static void MaybeCallEntryHook(MacroAssembler* masm);
 
+  // Sets or unsets the entry hook function. Returns true on success,
+  // false on an attempt to replace a non-NULL entry hook with another
+  // non-NULL hook.
+  static bool SetFunctionEntryHook(FunctionEntryHook entry_hook);
+
+  static bool HasEntryHook() { return entry_hook_ != NULL; }
+
  private:
   static void EntryHookTrampoline(intptr_t function,
                                   intptr_t stack_pointer);
@@ -2144,6 +2151,9 @@ class ProfileEntryHookStub : public PlatformCodeStub {
 
   void Generate(MacroAssembler* masm);
 
+  // The current function entry hook.
+  static FunctionEntryHook entry_hook_;
+
   DISALLOW_COPY_AND_ASSIGN(ProfileEntryHookStub);
 };
 

src/frames-inl.h

@@ -136,17 +136,6 @@ inline Code* StackFrame::GetContainingCode(Isolate* isolate, Address pc) {
 }
 
 
-inline Address* StackFrame::ResolveReturnAddressLocation(Address* pc_address) {
-  if (return_address_location_resolver_ == NULL) {
-    return pc_address;
-  } else {
-    return reinterpret_cast<Address*>(
-        return_address_location_resolver_(
-            reinterpret_cast<uintptr_t>(pc_address)));
-  }
-}
-
-
 inline EntryFrame::EntryFrame(StackFrameIteratorBase* iterator)
     : StackFrame(iterator) {
 }

src/frames.cc

@@ -43,8 +43,19 @@ namespace v8 {
 namespace internal {
 
 
-ReturnAddressLocationResolver
+static ReturnAddressLocationResolver return_address_location_resolver = NULL;
-    StackFrame::return_address_location_resolver_ = NULL;
+
+
+// Resolves pc_address through the resolution address function if one is set.
+static inline Address* ResolveReturnAddressLocation(Address* pc_address) {
+  if (return_address_location_resolver == NULL) {
+    return pc_address;
+  } else {
+    return reinterpret_cast<Address*>(
+        return_address_location_resolver(
+            reinterpret_cast<uintptr_t>(pc_address)));
+  }
+}
 
 
 // Iterator that supports traversing the stack handlers of a
@@ -228,7 +239,7 @@ SafeStackFrameIterator::SafeStackFrameIterator(
     ASSERT(fp != NULL);
     state.fp = fp;
     state.sp = sp;
-    state.pc_address = StackFrame::ResolveReturnAddressLocation(
+    state.pc_address = ResolveReturnAddressLocation(
         reinterpret_cast<Address*>(StandardFrame::ComputePCAddress(fp)));
     type = StackFrame::ComputeType(this, &state);
   } else {
@@ -378,8 +389,8 @@ void StackFrame::IteratePc(ObjectVisitor* v,
 
 void StackFrame::SetReturnAddressLocationResolver(
     ReturnAddressLocationResolver resolver) {
-  ASSERT(return_address_location_resolver_ == NULL);
+  ASSERT(return_address_location_resolver == NULL);
-  return_address_location_resolver_ = resolver;
+  return_address_location_resolver = resolver;
 }
 
 

src/frames.h

@@ -297,10 +297,6 @@ class StackFrame BASE_EMBEDDED {
   static void SetReturnAddressLocationResolver(
       ReturnAddressLocationResolver resolver);
 
-  // Resolves pc_address through the resolution address function if one is set.
-  static inline Address* ResolveReturnAddressLocation(Address* pc_address);
-
-
   // Printing support.
   enum PrintMode { OVERVIEW, DETAILS };
   virtual void Print(StringStream* accumulator,
@@ -336,8 +332,6 @@ class StackFrame BASE_EMBEDDED {
   Isolate* isolate_;
   State state_;
 
-  static ReturnAddressLocationResolver return_address_location_resolver_;
-
   // Fill in the state of the calling frame.
   virtual void ComputeCallerState(State* state) const = 0;
 

src/ia32/builtins-ia32.cc

@@ -447,8 +447,6 @@ void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) {
 
 static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
                                              bool is_construct) {
-  ProfileEntryHookStub::MaybeCallEntryHook(masm);
-
   // Clear the context before we push it when entering the internal frame.
   __ Set(esi, Immediate(0));
 

src/ia32/code-stubs-ia32.cc

@@ -5077,8 +5077,6 @@ void CEntryStub::Generate(MacroAssembler* masm) {
   // esi: current context (C callee-saved)
   // edi: JS function of the caller (C callee-saved)
 
-  ProfileEntryHookStub::MaybeCallEntryHook(masm);
-
   // NOTE: Invocations of builtins may return failure objects instead
   // of a proper result. The builtin entry handles this by performing
   // a garbage collection and retrying the builtin (twice).
@@ -5152,8 +5150,6 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   Label invoke, handler_entry, exit;
   Label not_outermost_js, not_outermost_js_2;
 
-  ProfileEntryHookStub::MaybeCallEntryHook(masm);
-
   // Set up frame.
   __ push(ebp);
   __ mov(ebp, esp);
@@ -7695,11 +7691,7 @@ void StubFailureTrampolineStub::Generate(MacroAssembler* masm) {
 
 
 void ProfileEntryHookStub::MaybeCallEntryHook(MacroAssembler* masm) {
-  if (masm->isolate()->function_entry_hook() != NULL) {
+  if (entry_hook_ != NULL) {
-    // It's always safe to call the entry hook stub, as the hook itself
-    // is not allowed to call back to V8.
-    AllowStubCallsScope allow_stub_calls(masm, true);
-
     ProfileEntryHookStub stub;
     masm->CallStub(&stub);
   }
@@ -7707,11 +7699,9 @@ void ProfileEntryHookStub::MaybeCallEntryHook(MacroAssembler* masm) {
 
 
 void ProfileEntryHookStub::Generate(MacroAssembler* masm) {
-  // Save volatile registers.
+  // Ecx is the only volatile register we must save.
-  const int kNumSavedRegisters = 3;
+  const int kNumSavedRegisters = 1;
-  __ push(eax);
   __ push(ecx);
-  __ push(edx);
 
   // Calculate and push the original stack pointer.
   __ lea(eax, Operand(esp, (kNumSavedRegisters + 1) * kPointerSize));
@@ -7724,16 +7714,12 @@ void ProfileEntryHookStub::Generate(MacroAssembler* masm) {
   __ push(eax);
 
   // Call the entry hook.
-  ASSERT(masm->isolate()->function_entry_hook() != NULL);
+  int32_t hook_location = reinterpret_cast<int32_t>(&entry_hook_);
-  __ call(FUNCTION_ADDR(masm->isolate()->function_entry_hook()),
+  __ call(Operand(hook_location, RelocInfo::NONE32));
-          RelocInfo::RUNTIME_ENTRY);
   __ add(esp, Immediate(2 * kPointerSize));
 
   // Restore ecx.
-  __ pop(edx);
   __ pop(ecx);
-  __ pop(eax);
-
   __ ret(0);
 }
 

src/ic.cc

@@ -144,7 +144,7 @@ IC::IC(FrameDepth depth, Isolate* isolate) : isolate_(isolate) {
   ASSERT(fp == frame->fp() && pc_address == frame->pc_address());
 #endif
   fp_ = fp;
-  pc_address_ = StackFrame::ResolveReturnAddressLocation(pc_address);
+  pc_address_ = pc_address;
 }
 
 

src/isolate.cc

@@ -1753,10 +1753,8 @@ Isolate::Isolate()
       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),
@@ -2079,14 +2077,6 @@ bool Isolate::Init(Deserializer* des) {
   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;
 
@@ -2278,9 +2268,6 @@ bool Isolate::Init(Deserializer* des) {
       sweeper_thread_[i]->Start();
     }
   }
-
-  initialized_from_snapshot_ = (des != NULL);
-
   return true;
 }
 

src/isolate.h

@@ -547,7 +547,7 @@ class Isolate {
   }
   Context** context_address() { return &thread_local_top_.context_; }
 
-  SaveContext* save_context() { return thread_local_top_.save_context_; }
+  SaveContext* save_context() {return thread_local_top_.save_context_; }
   void set_save_context(SaveContext* save) {
     thread_local_top_.save_context_ = save;
   }
@@ -1050,8 +1050,6 @@ class Isolate {
     context_exit_happened_ = context_exit_happened;
   }
 
-  bool initialized_from_snapshot() { return initialized_from_snapshot_; }
-
   double time_millis_since_init() {
     return OS::TimeCurrentMillis() - time_millis_at_init_;
   }
@@ -1111,11 +1109,6 @@ class Isolate {
   HStatistics* GetHStatistics();
   HTracer* GetHTracer();
 
-  FunctionEntryHook function_entry_hook() { return function_entry_hook_; }
-  void set_function_entry_hook(FunctionEntryHook function_entry_hook) {
-    function_entry_hook_ = function_entry_hook;
-  }
-
  private:
   Isolate();
 
@@ -1295,9 +1288,6 @@ class Isolate {
   // that a context was recently exited.
   bool context_exit_happened_;
 
-  // True if this isolate was initialized from a snapshot.
-  bool initialized_from_snapshot_;
-
   // Time stamp at initialization.
   double time_millis_at_init_;
 
@@ -1321,7 +1311,6 @@ class Isolate {
 #endif
   CpuProfiler* cpu_profiler_;
   HeapProfiler* heap_profiler_;
-  FunctionEntryHook function_entry_hook_;
 
 #define GLOBAL_BACKING_STORE(type, name, initialvalue)                         \
   type name##_;

src/v8.h

@@ -101,8 +101,6 @@ class V8 : public AllStatic {
   // Support for return-address rewriting profilers.
   static void SetReturnAddressLocationResolver(
       ReturnAddressLocationResolver resolver);
-  // Support for entry hooking JITed code.
-  static void SetFunctionEntryHook(FunctionEntryHook entry_hook);
   // Random number generation support. Not cryptographically safe.
   static uint32_t Random(Context* context);
   // We use random numbers internally in memory allocation and in the

src/x64/builtins-x64.cc

@@ -456,8 +456,6 @@ void Builtins::Generate_JSConstructStubApi(MacroAssembler* masm) {
 
 static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
                                              bool is_construct) {
-  ProfileEntryHookStub::MaybeCallEntryHook(masm);
-
   // Expects five C++ function parameters.
   // - Address entry (ignored)
   // - JSFunction* function (

src/x64/code-stubs-x64.cc

@@ -4129,8 +4129,6 @@ void CEntryStub::Generate(MacroAssembler* masm) {
   // this by performing a garbage collection and retrying the
   // builtin once.
 
-  ProfileEntryHookStub::MaybeCallEntryHook(masm);
-
   // Enter the exit frame that transitions from JavaScript to C++.
 #ifdef _WIN64
   int arg_stack_space = (result_size_ < 2 ? 2 : 4);
@@ -4211,8 +4209,6 @@ void JSEntryStub::GenerateBody(MacroAssembler* masm, bool is_construct) {
   Label invoke, handler_entry, exit;
   Label not_outermost_js, not_outermost_js_2;
 
-  ProfileEntryHookStub::MaybeCallEntryHook(masm);
-
   {  // NOLINT. Scope block confuses linter.
     MacroAssembler::NoRootArrayScope uninitialized_root_register(masm);
     // Set up frame.
@@ -6667,11 +6663,7 @@ void StubFailureTrampolineStub::Generate(MacroAssembler* masm) {
 
 
 void ProfileEntryHookStub::MaybeCallEntryHook(MacroAssembler* masm) {
-  if (masm->isolate()->function_entry_hook() != NULL) {
+  if (entry_hook_ != NULL) {
-    // It's always safe to call the entry hook stub, as the hook itself
-    // is not allowed to call back to V8.
-    AllowStubCallsScope allow_stub_calls(masm, true);
-
     ProfileEntryHookStub stub;
     masm->CallStub(&stub);
   }
@@ -6679,25 +6671,45 @@ void ProfileEntryHookStub::MaybeCallEntryHook(MacroAssembler* masm) {
 
 
 void ProfileEntryHookStub::Generate(MacroAssembler* masm) {
-  // This stub can be called from essentially anywhere, so it needs to save
+  // Save volatile registers.
-  // all volatile and callee-save registers.
+  // Live registers at this point are the same as at the start of any
-  const size_t kNumSavedRegisters = 2;
+  // JS function:
-  __ push(arg_reg_1);
+  //   o rdi: the JS function object being called (i.e. ourselves)
-  __ push(arg_reg_2);
+  //   o rsi: our context
+  //   o rbp: our caller's frame pointer
+  //   o rsp: stack pointer (pointing to return address)
+  //   o rcx: rcx is zero for method calls and non-zero for function calls.
+#ifdef _WIN64
+  const int kNumSavedRegisters = 1;
+
+  __ push(rcx);
+#else
+  const int kNumSavedRegisters = 3;
+
+  __ push(rcx);
+  __ push(rdi);
+  __ push(rsi);
+#endif
 
   // Calculate the original stack pointer and store it in the second arg.
-  __ lea(arg_reg_2, Operand(rsp, (kNumSavedRegisters + 1) * kPointerSize));
+#ifdef _WIN64
+  __ lea(rdx, Operand(rsp, (kNumSavedRegisters + 1) * kPointerSize));
+#else
+  __ lea(rsi, Operand(rsp, (kNumSavedRegisters + 1) * kPointerSize));
+#endif
 
   // Calculate the function address to the first arg.
-  __ movq(arg_reg_1, Operand(rsp, kNumSavedRegisters * kPointerSize));
+#ifdef _WIN64
-  __ subq(arg_reg_1, Immediate(Assembler::kShortCallInstructionLength));
+  __ movq(rcx, Operand(rsp, kNumSavedRegisters * kPointerSize));
-
+  __ subq(rcx, Immediate(Assembler::kShortCallInstructionLength));
-  // Save the remainder of the volatile registers.
+#else
-  masm->PushCallerSaved(kSaveFPRegs, arg_reg_1, arg_reg_2);
+  __ movq(rdi, Operand(rsp, kNumSavedRegisters * kPointerSize));
+  __ subq(rdi, Immediate(Assembler::kShortCallInstructionLength));
+#endif
 
   // Call the entry hook function.
-  __ movq(rax, FUNCTION_ADDR(masm->isolate()->function_entry_hook()),
+  __ movq(rax, &entry_hook_, RelocInfo::NONE64);
-          RelocInfo::NONE64);
+  __ movq(rax, Operand(rax, 0));
 
   AllowExternalCallThatCantCauseGC scope(masm);
 
@@ -6706,9 +6718,13 @@ void ProfileEntryHookStub::Generate(MacroAssembler* masm) {
   __ CallCFunction(rax, kArgumentCount);
 
   // Restore volatile regs.
-  masm->PopCallerSaved(kSaveFPRegs, arg_reg_1, arg_reg_2);
+#ifdef _WIN64
-  __ pop(arg_reg_2);
+  __ pop(rcx);
-  __ pop(arg_reg_1);
+#else
+  __ pop(rsi);
+  __ pop(rdi);
+  __ pop(rcx);
+#endif
 
   __ Ret();
 }

test/cctest/test-api.cc

@@ -31,8 +31,6 @@
 #include <signal.h>  // kill
 #include <unistd.h>  // getpid
 #endif  // WIN32
-#include <string>
-#include <map>
 
 #include "v8.h"
 
@@ -12265,268 +12263,68 @@ THREADED_TEST(NestedHandleScopeAndContexts) {
 }
 
 
-static bool MatchPointers(void* key1, void* key2) {
+static i::Handle<i::JSFunction>* foo_ptr = NULL;
-  return key1 == key2;
+static int foo_entry_count = 0;
-}
+static i::Handle<i::JSFunction>* bar_ptr = NULL;
+static int bar_entry_count = 0;
+static int bar_caller_count = 0;
 
 
-struct SymbolInfo {
+static void entry_hook(uintptr_t function,
-  size_t id;
-  size_t size;
-  std::string name;
-};
-
-
-class SetFunctionEntryHookTest {
- public:
-  SetFunctionEntryHookTest() {
-    CHECK(instance_ == NULL);
-    instance_ = this;
-  }
-  ~SetFunctionEntryHookTest() {
-    CHECK(instance_ == this);
-    instance_ = NULL;
-  }
-  void Reset() {
-    symbols_.clear();
-    symbol_locations_.clear();
-    invocations_.clear();
-  }
-  void RunTest();
-  void OnJitEvent(const v8::JitCodeEvent* event);
-  static void JitEvent(const v8::JitCodeEvent* event) {
-    CHECK(instance_ != NULL);
-    instance_->OnJitEvent(event);
-  }
-
-  void OnEntryHook(uintptr_t function,
-                   uintptr_t return_addr_location);
-  static void EntryHook(uintptr_t function,
                        uintptr_t return_addr_location) {
-    CHECK(instance_ != NULL);
+  i::Code* code = i::Code::GetCodeFromTargetAddress(
-    instance_->OnEntryHook(function, return_addr_location);
-  }
-
-  static void RuntimeCallback(const v8::FunctionCallbackInfo<v8::Value>& args) {
-    CHECK(instance_ != NULL);
-    args.GetReturnValue().Set(v8_num(42));
-  }
-  void RunLoopInNewEnv(v8::Isolate* isolate);
-
-  // Records addr as location of symbol.
-  void InsertSymbolAt(i::Address addr, SymbolInfo* symbol);
-
-  // Finds the symbol containing addr
-  SymbolInfo* FindSymbolForAddr(i::Address addr);
-  // Returns the number of invocations where the caller name contains
-  // \p caller_name and the function name contains \p function_name.
-  size_t CountInvocations(const char* caller_name,
-                          const char* function_name);
-
-  i::Handle<i::JSFunction> foo_func_;
-  i::Handle<i::JSFunction> bar_func_;
-
-  typedef std::map<size_t, SymbolInfo> SymbolMap;
-  typedef std::map<i::Address, SymbolInfo*> SymbolLocationMap;
-  typedef std::map<std::pair<SymbolInfo*, SymbolInfo*>, size_t> InvocationMap;
-  SymbolMap symbols_;
-  SymbolLocationMap symbol_locations_;
-  InvocationMap invocations_;
-
-  static SetFunctionEntryHookTest* instance_;
-};
-SetFunctionEntryHookTest* SetFunctionEntryHookTest::instance_ = NULL;
-
-
-// Returns true if addr is in the range [start, start+len).
-static bool Overlaps(i::Address start, size_t len, i::Address addr) {
-  if (start <= addr && start + len > addr)
-    return true;
-
-  return false;
-}
-
-void SetFunctionEntryHookTest::InsertSymbolAt(i::Address addr,
-                                              SymbolInfo* symbol) {
-  // Insert the symbol at the new location.
-  SymbolLocationMap::iterator it =
-      symbol_locations_.insert(std::make_pair(addr, symbol)).first;
-  // Now erase symbols to the left and right that overlap this one.
-  while (it != symbol_locations_.begin()) {
-    SymbolLocationMap::iterator left = it;
-    --left;
-    if (!Overlaps(left->first, left->second->size, addr))
-      break;
-    symbol_locations_.erase(left);
-  }
-
-  // Now erase symbols to the left and right that overlap this one.
-  while (true) {
-    SymbolLocationMap::iterator right = it;
-    ++right;
-    if (right == symbol_locations_.end())
-        break;
-    if (!Overlaps(addr, symbol->size, right->first))
-      break;
-    symbol_locations_.erase(right);
-  }
-}
-
-
-void SetFunctionEntryHookTest::OnJitEvent(const v8::JitCodeEvent* event) {
-  switch (event->type) {
-    case v8::JitCodeEvent::CODE_ADDED: {
-        CHECK(event->code_start != NULL);
-        CHECK_NE(0, static_cast<int>(event->code_len));
-        CHECK(event->name.str != NULL);
-        size_t symbol_id = symbols_.size();
-
-        // Record the new symbol.
-        SymbolInfo& info = symbols_[symbol_id];
-        info.id = symbol_id;
-        info.size = event->code_len;
-        info.name.assign(event->name.str, event->name.str + event->name.len);
-
-        // And record it's location.
-        InsertSymbolAt(reinterpret_cast<i::Address>(event->code_start), &info);
-      }
-      break;
-
-    case v8::JitCodeEvent::CODE_MOVED: {
-        // We would like to never see code move that we haven't seen before,
-        // but the code creation event does not happen until the line endings
-        // have been calculated (this is so that we can report the line in the
-        // script at which the function source is found, see
-        // Compiler::RecordFunctionCompilation) and the line endings
-        // calculations can cause a GC, which can move the newly created code
-        // before its existence can be logged.
-        SymbolLocationMap::iterator it(
-            symbol_locations_.find(
-                reinterpret_cast<i::Address>(event->code_start)));
-        if (it != symbol_locations_.end()) {
-          // Found a symbol at this location, move it.
-          SymbolInfo* info = it->second;
-          symbol_locations_.erase(it);
-          InsertSymbolAt(reinterpret_cast<i::Address>(event->new_code_start),
-                         info);
-        }
-      }
-    default:
-      break;
-  }
-}
-
-void SetFunctionEntryHookTest::OnEntryHook(
-    uintptr_t function, uintptr_t return_addr_location) {
-  // Get the function's code object.
-  i::Code* function_code = i::Code::GetCodeFromTargetAddress(
       reinterpret_cast<i::Address>(function));
-  CHECK(function_code != NULL);
+  CHECK(code != NULL);
 
-  // Then try and look up the caller's code object.
+  if (bar_ptr != NULL && code == (*bar_ptr)->code())
-  i::Address caller = *reinterpret_cast<i::Address*>(return_addr_location);
+    ++bar_entry_count;
 
-  // Count the invocation.
+  if (foo_ptr != NULL && code == (*foo_ptr)->code())
-  SymbolInfo* caller_symbol = FindSymbolForAddr(caller);
+    ++foo_entry_count;
-  SymbolInfo* function_symbol =
-      FindSymbolForAddr(reinterpret_cast<i::Address>(function));
-  ++invocations_[std::make_pair(caller_symbol, function_symbol)];
 
-  if (!bar_func_.is_null() && function_code == bar_func_->code()) {
+  // Let's check whether bar is the caller.
-    // Check that we have a symbol for the "bar" function at the right location.
+  if (bar_ptr != NULL) {
-    SymbolLocationMap::iterator it(
+    const v8::internal::byte* caller =
-        symbol_locations_.find(function_code->instruction_start()));
+        *reinterpret_cast<v8::internal::byte**>(return_addr_location);
-    CHECK(it != symbol_locations_.end());
+
+    if ((*bar_ptr)->code()->instruction_start() <= caller &&
+        (*bar_ptr)->code()->instruction_end() > caller) {
+      ++bar_caller_count;
     }
-
-  if (!foo_func_.is_null() && function_code == foo_func_->code()) {
-    // Check that we have a symbol for "foo" at the right location.
-    SymbolLocationMap::iterator it(
-        symbol_locations_.find(function_code->instruction_start()));
-    CHECK(it != symbol_locations_.end());
   }
 }
 
 
-SymbolInfo* SetFunctionEntryHookTest::FindSymbolForAddr(i::Address addr) {
+static void RunLoopInNewEnv() {
-  SymbolLocationMap::iterator it(symbol_locations_.lower_bound(addr));
+  bar_ptr = NULL;
-  // Do we have a direct hit on a symbol?
+  foo_ptr = NULL;
-  if (it != symbol_locations_.end()) {
-    if (it->first == addr)
-      return it->second;
-  }
 
-  // If not a direct hit, it'll have to be the previous symbol.
+  v8::Isolate* isolate = v8::Isolate::GetCurrent();
-  if (it == symbol_locations_.begin())
-    return NULL;
-
-  --it;
-  size_t offs = addr - it->first;
-  if (offs < it->second->size)
-    return it->second;
-
-  return NULL;
-}
-
-
-size_t SetFunctionEntryHookTest::CountInvocations(
-    const char* caller_name, const char* function_name) {
-  InvocationMap::iterator it(invocations_.begin());
-  size_t invocations = 0;
-  for (; it != invocations_.end(); ++it) {
-    SymbolInfo* caller = it->first.first;
-    SymbolInfo* function = it->first.second;
-
-    // Filter out non-matching functions.
-    if (function_name != NULL) {
-      if (function->name.find(function_name) == std::string::npos)
-        continue;
-    }
-
-    // Filter out non-matching callers.
-    if (caller_name != NULL) {
-      if (caller == NULL)
-        continue;
-      if (caller->name.find(caller_name) == std::string::npos)
-        continue;
-    }
-
-    // It matches add the invocation count to the tally.
-    invocations += it->second;
-  }
-
-  return invocations;
-}
-
-
-void SetFunctionEntryHookTest::RunLoopInNewEnv(v8::Isolate* isolate) {
   v8::HandleScope outer(isolate);
   v8::Local<Context> env = Context::New(isolate);
   env->Enter();
 
-  Local<ObjectTemplate> t = ObjectTemplate::New();
-  t->Set(v8_str("asdf"), v8::FunctionTemplate::New(RuntimeCallback));
-  env->Global()->Set(v8_str("obj"), t->NewInstance());
-
   const char* script =
-      "function bar() {\n"
+      "function bar() {"
-      "  var sum = 0;\n"
+      "  var sum = 0;"
-      "  for (i = 0; i < 100; ++i)\n"
+      "  for (i = 0; i < 100; ++i)"
-      "    sum = foo(i);\n"
+      "    sum = foo(i);"
-      "  return sum;\n"
+      "  return sum;"
-      "}\n"
+      "}"
-      "function foo(i) { return i * i; }\n"
+      "function foo(i) { return i * i; }";
-      "// Invoke on the runtime function.\n"
-      "obj.asdf()";
   CompileRun(script);
-  bar_func_ = i::Handle<i::JSFunction>::cast(
+  i::Handle<i::JSFunction> bar =
+      i::Handle<i::JSFunction>::cast(
           v8::Utils::OpenHandle(*env->Global()->Get(v8_str("bar"))));
-  ASSERT(!bar_func_.is_null());
+  ASSERT(*bar);
 
-  foo_func_ =
+  i::Handle<i::JSFunction> foo =
       i::Handle<i::JSFunction>::cast(
            v8::Utils::OpenHandle(*env->Global()->Get(v8_str("foo"))));
-  ASSERT(!foo_func_.is_null());
+  ASSERT(*foo);
+
+  bar_ptr = &bar;
+  foo_ptr = &foo;
 
   v8::Handle<v8::Value> value = CompileRun("bar();");
   CHECK(value->IsNumber());
@@ -12541,55 +12339,6 @@ void SetFunctionEntryHookTest::RunLoopInNewEnv(v8::Isolate* isolate) {
   env->Exit();
 }
 
-void SetFunctionEntryHookTest::RunTest() {
-  // Work in a new isolate throughout.
-  v8::Isolate* isolate = v8::Isolate::New();
-
-  // Test setting the entry hook on the new isolate.
-  CHECK(v8::V8::SetFunctionEntryHook(isolate, EntryHook));
-
-  // Replacing the hook, once set should fail.
-  CHECK_EQ(false, v8::V8::SetFunctionEntryHook(isolate, EntryHook));
-
-  {
-    v8::Isolate::Scope scope(isolate);
-
-    v8::V8::SetJitCodeEventHandler(v8::kJitCodeEventDefault, JitEvent);
-
-    RunLoopInNewEnv(isolate);
-
-    // Check the exepected invocation counts.
-    CHECK_EQ(2, CountInvocations(NULL, "bar"));
-    CHECK_EQ(200, CountInvocations("bar", "foo"));
-    CHECK_EQ(200, CountInvocations(NULL, "foo"));
-
-    // Verify that we have an entry hook on some specific stubs.
-    CHECK_NE(0, CountInvocations(NULL, "CEntryStub"));
-    CHECK_NE(0, CountInvocations(NULL, "JSEntryStub"));
-    CHECK_NE(0, CountInvocations(NULL, "JSEntryTrampoline"));
-  }
-  isolate->Dispose();
-
-  Reset();
-
-  // Make sure a second isolate is unaffected by the previous entry hook.
-  isolate = v8::Isolate::New();
-  {
-    v8::Isolate::Scope scope(isolate);
-
-    // Reset the entry count to zero and set the entry hook.
-    RunLoopInNewEnv(isolate);
-
-    // We should record no invocations in this isolate.
-    CHECK_EQ(0, invocations_.size());
-  }
-  // Since the isolate has been used, we shouldn't be able to set an entry
-  // hook anymore.
-  CHECK_EQ(false, v8::V8::SetFunctionEntryHook(isolate, EntryHook));
-
-  isolate->Dispose();
-}
-
 
 TEST(SetFunctionEntryHook) {
   // FunctionEntryHook does not work well with experimental natives.
@@ -12602,8 +12351,42 @@ TEST(SetFunctionEntryHook) {
   i::FLAG_allow_natives_syntax = true;
   i::FLAG_use_inlining = false;
 
-  SetFunctionEntryHookTest test;
+  // Test setting and resetting the entry hook.
-  test.RunTest();
+  // Nulling it should always succeed.
+  CHECK(v8::V8::SetFunctionEntryHook(NULL));
+
+  CHECK(v8::V8::SetFunctionEntryHook(entry_hook));
+  // Setting a hook while one's active should fail.
+  CHECK_EQ(false, v8::V8::SetFunctionEntryHook(entry_hook));
+
+  CHECK(v8::V8::SetFunctionEntryHook(NULL));
+
+  // Reset the entry count to zero and set the entry hook.
+  bar_entry_count = 0;
+  bar_caller_count = 0;
+  foo_entry_count = 0;
+  CHECK(v8::V8::SetFunctionEntryHook(entry_hook));
+  RunLoopInNewEnv();
+
+  CHECK_EQ(2, bar_entry_count);
+  CHECK_EQ(200, bar_caller_count);
+  CHECK_EQ(200, foo_entry_count);
+
+  // Clear the entry hook and count.
+  bar_entry_count = 0;
+  bar_caller_count = 0;
+  foo_entry_count = 0;
+  v8::V8::SetFunctionEntryHook(NULL);
+
+  // Clear the compilation cache to make sure we don't reuse the
+  // functions from the previous invocation.
+  v8::internal::Isolate::Current()->compilation_cache()->Clear();
+
+  // Verify that entry hooking is now disabled.
+  RunLoopInNewEnv();
+  CHECK_EQ(0u, bar_entry_count);
+  CHECK_EQ(0u, bar_caller_count);
+  CHECK_EQ(0u, foo_entry_count);
 }
 
 
@@ -12745,6 +12528,11 @@ static void event_handler(const v8::JitCodeEvent* event) {
 }
 
 
+static bool MatchPointers(void* key1, void* key2) {
+  return key1 == key2;
+}
+
+
 TEST(SetJitCodeEventHandler) {
   i::FLAG_stress_compaction = true;
   i::FLAG_incremental_marking = false;